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Sunil S. Chirayath Nuclear Security Science and Policy Institute, Telephone: +1-979-862-2616 Department of Nuclear Engineering, Texas A&M University Fax: +1-979-845-6443 College Station, TX 77843-3473 USA Email: sunilsc@tamu.edu

http://engineering.tamu.edu/nuclear/people/chirayath-sunil

A. PROFESSIONAL PREPARATION

• Texas A&M University, USA Postdoc in Nuclear Nonproliferation Aug.’07-April’10

• University of Madras, India Physics Ph.D., 2005

• University of Calicut, India Physics M.Sc., 1994

• Bhabha Atomic Research Center, India Nuclear Science & Engineering Trainee 1990-1991

• University of Calicut, India Physics B.Sc., 1989

B. APPOINTMENTS

• March 2016-Present Director, Nuclear Security Science and Policy Institute (NSSPI), Texas A&M Engineering Experiment Station (TEES)

• September 2015-Present Texas A&M Research Assistant Professor, Department of Nuclear Engineering (NUEN)

• June 2015-February 2016 Interim Director, NSSPI-TEES

• September 2014-February 2016 Associate Director, NSSPI-TEES

• May 2010-August 2014 Research Scientist, NSSPI-TEES

• January 2009-August 2015 Texas A&M Visiting Assistant Professor, NUEN

• May 1999-November 2009 Scientific Officer, Safety Research Institute Atomic Energy Regulatory Board (AERB), Kalpakkam, India

• February 1998-April 1999 Scientific Officer, AERB, Mumbai, India

• November 1991-January 1998 Scientific Assistant, AERB, Mumbai, India

C. COURSES TAUGHT In the last 8 years of teaching (January 1, 2009 through August 31, 2016) following six different courses in addition research hours and direct studies were taught, 346 students took the courses and the mean student evaluation score obtained is 4.41 ± 0.34 (out of a 5-point scale).

*The bold number in bracket indicates number of times each course was taught.

1. MS-NUEN-651-Nuclear Fuel Cycle and Nuclear Material Safeguards (7)*

2. MS-NUEN-630-Monte Carlo Radiation Transport Methods with focus on MCNP Code (5)

3. MS-NUEN-650-Nuclear Nonproliferation and Arms Control (1)

4. MS-NUEN-689-629-Monte Carlo Radiation Transport Methods with focus on MCNP Code (1)

5. MS-NUEN-691-Research Hours (10)

6. BS-ENGR-489-511-Aggie Challenge Project Course (2)

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D. STUDENT and POSTDOC ADVISING

• Texas A&M MS Students: advised 9 with 6 graduated, co-advised 8 with 6 graduated

• Texas A&M ME Students: advised 1 with 1 graduated

• Texas A&M PhD Students: advised 5 with 2 graduated

• Texas A&M BS Students: o advised 10 students of capstone class project o advised 5 students thorough experiential learning by funded research o advised 15 students of Aggie Challenge class project o advised 3 students on study abroad program

• Student Thesis Committee Member: 5 (3 graduated)

• Student Dissertation Committee Member: 10 (4 graduated)

• Postdoctoral Research Associates: advised 3 and recruited one postdoc as Assistant Research Scientist in NSSPI

• Interns: Advised 4 MS students from Russian Tomsk Polytechnic University in three years; 1 undergraduate summer intern from University of Colorado, Boulder; 3 undergraduate summer interns from Indian Institute of Technology-Kanpur.

• Graduate Student Co-Advising International: advised 2 with graduated 2 (North West University-South Africa); advised 1 with 1 graduated (Indian Institute of Technology-Kanpur);

• International Visiting Scholars: 1 postdoctoral visiting scholar (two-week) from Brazilian Federal University of Rio de Janeiro, UFRJ, 1 visiting scholar (1 semester) from Jordan Atomic Energy Commission; 1 visiting scholar (one year) from Tokyo Institute of Technology Nuclear Engineering Department PhD Student.

E. INDIVIDUAL RESEARCH FUNDING METRIC PERIOD: FY 2011-FY 2016 (~6 years)

• Collaborative Research Proposal Submissions: $64.7 Million

• Individual Award Contribution: Exceeded $2.8 Million

• Total Sponsored Research Awards with Collaborators: Exceeded $15.3 Million

F. PUBLICATIONS SUMMARY (Listed in section J1, J2 and J3 below) Peer Reviewed Journal: 31; Conference Proceedings Peer Reviewed: 14; Conference Proceedings: 77; Book Chapters: 2 chapters on Nuclear Energy in al. Economides E. Live Energy, ISBN 978-1-4652-7562-2.

Citations: 141; h-index: 7; i-10 index-6 by Google Scholar Citations

G. SERVICE AND SYNERGESTIC ACTIVTIES • Reviewed 21 manuscripts for Journal Publications (See below the name of the journal and number of

manuscripts reviewed)

o Annals of Nuclear Energy (7)

o Nuclear Engineering and Design (11)

o Applied Radiation and Isotopes (2)

o Nuclear Technology (1)

o Progress in Nuclear Energy (1)

• Prepared training course materials on nuclear safety, security and safeguards (3S).

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• Lectured on 3S topics at Texas A&M University and at International universities/organizations (Brazil, India, Indonesia, Japan, Ghana, and South Korea).

• Conducted tailored workshops on nuclear security and nuclear culture in the U.S. and abroad for international faculty and students (Brazil, Jordan, India, Indonesia, and Ghana).

• Served as Chair at the ANS Annual Meeting for the “Intersection of Policy Development and Technical Innovation for Nuclear Nonproliferation and Security”, Las Vegas, Nevada, November 8, 2016.

• Served as the Session Co-Chair at the INMM 57th Annual Meeting for the “Education and Training: International Nuclear Security Training”, Atlanta, Georgia, July 28, 2016.

• Served as the Panel Member at the INMM 57th Annual Meeting for the “Continuing the Conversation from the INMM Safeguards Culture Workshop held at Texas A&M University”, Atlanta, Georgia, July 26, 2016.

• Served as a panel member on Nuclear Security Education at the International Nuclear Atlantic Conference (INAC) held in Sao Paulo, Brazil, October 6, 2015.

• Served as the Technical Program Committee of ASTECHNOVA 2015 (International Energy Conference), Yogyakarta, Indonesia, November, 25-26, 2015.

• Served as the Technical Program Committee of ASTECHNOVA 2016 (International Energy Conference), Yogyakarta, Indonesia, November, 2-3, 2016.

• Delivered Invited talk on "Safeguards Issues and Recommendations for a Fast Reactor Fuel Cycle” at 18th Annual Meeting of the Korea chapter of the Institute of Nuclear Materials Management, Daejeon, South Korea, November 13, 2014.

• Consultant to Korea Atomic Energy Research Institute of Spent Nuclear Fuel Pyroprocessing Safeguards (2015).

• Lectured on 3S topics to visiting professionals and faculty from new comer nuclear energy countries such as Indonesia, Nigeria, Kenya, Uganda, and Jordan to Texas A&M University on various IAEA supported training programs.

• Served as the Session Co-Chair at the INMM 54th Annual Meeting for the “Materials Control and Accountability-Destructive Analysis Techniques”, Palm Desert, California, July 15, 2013.

• Served as the Session Co-Chair at the INMM 54th Annual Meeting for the “Nuclear Security and Physical Protection-Protection Assessment Methodologies and Simulation Modeling”, Palm Desert, California, July 18, 2013.

• Serves as faculty adviser of the Texas A&M University student chapter of the Institute of Nuclear Materials and Management since 2011.

• Member of the American Nuclear Society (ANS) since 2008

• Member of the Institute of Nuclear Materials Management (INMM) since 2010

• Life member of the Indian Association of Radiation Protection (IARP) since 1992

• Life member of the Indian Society of Radiation Physics (ISRP) since 2000.

H. AWARDS

• Outstanding Faculty Award: Texas A&M Nuclear Engineering Department, Academic Year 2011-2012

• Fr. Abraham Wadassery Award: Best M.S. Student at St. Thomas College, Thrissur, India, 1990

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J1. LIST OF PEER REVIEWED JOURNAL PUBLICATIONS

(* indicates student)

1. E. D. KITCHER* and S.S. CHIRAYATH, “A Neutron Transport and Thermal Hydraulics Coupling Scheme to Study Xenon Induced Power Oscillations in a Nuclear Reactor”, Communicated to Annals of Nuclear Energy, October (2016).

2. M.W. SWINNEY*, C.M. FOLDEN III, R.J. ELLIS, and S.S. CHIRAYATH, “Experimental and Computational Forensics Characterization of Weapons-grade Plutonium Produced in a Fast Reactor Neutron Environment”, Nuclear Technology, 197 (1), 1-11, January (2017).

3. M.A. HAWILA* and S.S. CHIRAYATH, “Nuclear Security Risk Analysis: An Insider-Outsider Collusion Scenario”, International Journal of Nuclear Security, 2 (2), December, (2016).

4. P.M. MENDOZA*, S.S. CHIRAYATH, and C.M. FOLDEN III, “Fission Product Decontamination Factors for Plutonium Separated by PUREX from Low-Burnup Fast Neutron Irradiated Depleted UO2”, Applied Radiation and Isotopes, 118, 38-42, September (2016).

5. E. D. KITCHER* and S.S. CHIRAYATH, “Neutronics and Thermal Hydraulics Analysis of a Small Modular Reactor”, Annals of Nuclear Energy, 97, 232-245, August (2016).

6. T.M. MARTIN*, L. VASUDEVAN, and S.S. CHIRAYATH, “Correlation between Exposure Rate and Residual Activity in Felines undergoing 131I Thyroid Ablation Therapy”, Health Physics Journal, 109 (2), pp 95-103, August, (2015).

7. M. D. TOIT* and S.S. CHIRAYATH, “Proposal for Improved Nuclear Fuel Utilisation and Economic Performance by Utilising Thorium”, Journal of Energy in Southern Africa (JESA), 26 (2), 11-18, May, (2015).

8. S. S. CHIRAYATH, R. ELMORE*, G. HOLLENBECK*, N. CHANDREGOWDA*, W.S. CHARTLON, R. METCALF*, J. RAGUSA, “Proliferation Resistance Analysis and Evaluation Tool for Observed Risk (PRAETOR) - Methodology Development,” Journal of Nuclear Materials Management, 43 (2), 22-36, (2015).

9. R. KELLY*, P. TSVETKOV, S.S. CHIRAYATH, J. POSTON and E. D. KITCHER*, “Uncertainty Quantification of Concrete Utilized in Dry Cask Storage”, Nuclear Technology, 190 (1), 72-87, April, (2015).

10. S. S. CHIRAYATH, J. M. OSBORN*, and T.M. COLES*, “Trace Fission Product Ratios for Nuclear Forensics Attribution of Weapons-Grade Plutonium from Fast and Thermal Reactors,” Science and Global Security, 23 (1), 48-67 March, (2015).

11. C. A. GARIAZZO, K.H. RAGUSA, D.R. BOYLE, W.S. CHARLTON, S.S. CHIRAYATH, C.M. MARIANNO, and P. NELSON Jr., "The Nuclear Security Science and Policy Institute at Texas A&M University," International Journal of Nuclear Security: Vol. 1: No. 1, Article 10 (2015).

12. A. KUMAR*, S.S. CHIRAYATH, P.V. TSVETKOV, “Analysis of a sustainable gas cooled fast breeder reactor concept,” Annals of Nuclear Energy, 69, 252-259, July (2014).

13. N.G. CHANDREGOWDA*, S.S. CHIRAYATH, W.S. CHARLTON, Y. Ham, S. SITARAMAN, G. H. Ahn “Assessment of the Fingerprinting Method for the Verification of Spent Fuel in MACSTOR KN-400 CANDU Spent-Fuel Dry Storage,” Nuclear Technology, 184 (3), December (2013).

14. G.M. GAUKLER, C. LI, Y. DING and S.S. CHIRAYATH, “Detecting Nuclear Materials Smuggling: Performance Evaluation of Container Inspection Policies,” Risk Analysis, 32 (3), 531-554, March (2012).

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15. G.M. GAUKLER, C. LI, R. CANNADAY*, S.S. CHIRAYATH and Y. DING, “Detecting Nuclear Materials Smuggling using Radiography to Improve Container Inspection Policies,” Annals of Operations Research, 187, 65-87, July (2011).

16. S. S. CHIRAYATH, G. HOLLENBECK*, J. RAGUSA and P. NELSON, “Neutronic and Nonproliferation Characteristics of (PuO2-UO2) and (PuO2-ThO2) as Fast Reactor Fuels,” Nuclear Engineering and Design, 239, 1916-1924, October, (2009).

17. L. THILAGAM*, V. JAGANNATHAN, S.S. CHIRAYATH and K.V. SUBBAIAH, “VVER-1000 MOX Core Computational Benchmark Analysis using indigenous codes EXCEL, TRIHEX-FA and HEXPIN”, Annals of Nuclear Energy, 36(10), 1502-1515, October (2009).

18. L. THILAGAM*, S.S. CHIRAYATH, V. JAGANNATHAN, and K.V. SUBBAIAH,“A VVER-1000 LEU and MOX Assembly Computational Benchmark Analysis using the Lattice Burn-up code EXCEL”, Annals of Nuclear Energy, 36 (4), 505-519, May, (2009).

19. S.S. CHIRAYATH, D.K. MOHAPATRA, P. MOHANAKRISHNAN, K.V. SUBBAIAH, “KAMINI Reactor Benchmark Analysis,” Annals of Nuclear Energy, 35 (4), 570-575, April (2008).

20. K. DEVAN*, P. ARUNA, D. MANIGANDAN, G. BHARANIDHARAN, K.V. SUBBAIAH, S.S. CHIRAYATH, S. GANESAN, “Evaluation of Dosimetric Parameters for various Ir-192 Brachy-Therapy Sources under Unbounded Phantom Geometry by Monte Carlo Simulation”, Medical Dosimetry, 32(4), 305-315, February (2008).

21. C.S. SUREKHA*, S.S. CHIRAYATH, K.V. SUBBAIAH, P. ARUNA and S. GANESAN, “Dose Distribution for Endo-vascular Brachy-therapy using Ir-192 Sources: Comparison of Monte Carlo Calculations with Radio-chromic Measurements”, Physics in Medicine and Biology, 52(2), 525-537, January (2007).

22. R. BASKARAN, T.S. SELVAKUMARAN, and S.S. CHIRAYATH, “Analysis of X-ray Spectrum obtained in Electron Cyclotron Resonance X-ray Source”, Review of Scientific Instruments, 77(3), February, (2006).

23. C.S. SUREKHA*, S.S. CHIRAYATH, K.V. SUBBAIAH, P. ARUNA and S. GANESAN, Medical Physics, 33(6), 1552-1561, June, (2006).

24. D.K. MOHAPATRA, S.S. CHIRAYATH, P. MOHANAKRISHNAN, and K.V. SUBBAIAH, “Monte Carlo Modeling of KAMINI”, Annals of Nuclear Energy, 31 (18), 2185-2194, December (2004).

25. S.S. CHIRAYATH and K.V. SUBBAIAH, “Shield structure optimization studies for the west beam port of the KAMINI reactor”, Annals of Nuclear Energy, 31(12), August (2004).

26. K.V. SUBBAIAH and S.S. CHIRAYATH, “View-CXS: Neutron and Photon Cross-Sections Viewer”, Annals of Nuclear Energy, 31(8), May (2004).

27. S.S. CHIRAYATH, L.V. NARAYANA and K.V. SUBBAIAH ,“Simulation of Electron Linear Accelerator Head for 6MV Photon Beam Dose Calculations in Water Phantom Using Monte Carlo Methods”, Journal of Medical Physics, 27(3), July – September (2002).

28. K.V. SUBBAIAH and S.S. CHIRAYATH, “KAMINI Reactor South Beam Port Shield-Structure Optimization” Nuclear Technology, 135(3), September, (2001).

29. C.R. GOPALAKRISHNAN and S.S. CHIRAYATH, “A new look at Dosimetry System- DS86”, Radiation Protection and Environment, 24(1&2), Jan-June (2001).

30. S.S. CHIRAYATH, K.K. NARAYANAN and V.K. GUPTA, “Development of an ALARA Program based on Radiological Measurements at a Nuclear Power Plant”, Radiation protection and environment, 23(1), Jan-Mar, (2000).

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31. V.K. GUPTA and S.S. CHIRAYATH, “Assessment of Collective Radiation Dose Budget for PHWR Stations”, Radiation Protection and Environment, 20(1), (1997).

32. V.K. GUPTA and S.S. CHIRAYATH, “Analysis of Routine Radiological Measurements in a Nuclear Power Plant”, Nuclear Technology, 114(3), June (1996).

J2. LIST OF PEER REVIEWED CONFERENCE PUBLICATIONS

(* indicates student)

1. T. AOKI*, S.S. CHIRAYATH and H. SAGARA, “Material Balance Area Design for the Transuranic Fuel Cycle Employing High Temperature Gas Cooled Reactors,” Transactions of American Nuclear Society, 115, 909-912, November, (2016).

2. M.A. HAWILA* and S.S. CHIRAYATH, “Probabilistic Risk Assessment of Spent Fuel Pool Cooling System Failure Considering Safety and Security Initiating Events,” Transactions of American Nuclear Society, 115, 815-818, November, (2016).

3. S.S. CHIRAYATH, C.M. MARIANNO, C.A. GARIAZZO, P. NELSON, D.R. BOYLE and K.H. RAGUSA, “Ten Years of Nuclear Security Education, Research and Training at Texas A&M Unviersity,” ANS Topical on Advances in Nuclear Nonproliferation Technology & Policy Conference (ANTPC), September 25-30, (2016).

4. T. AOKI*, H. SAGARA, and S.S. CHIRAYATH, “Proliferation Resistance Evlauation of an Advanced Fuel Cycle Employing High Temperature Gas Cooled Reactors,” ANS Topical on Advances in Nuclear Nonproliferation Technology & Policy Conference (ANTPC), September 25-30, (2016).

5. E.D. KITCHER* and S.S. CHIRAYATH, “Analysis of a Generic Small Modular Integral Pressurized Water Reactor: Burnable Absorber Rod Materials,” Transactions of American Nuclear Society, 113 (1), 1045-1048, October, (2015).

6. C. HUGHES*, A. DALUKA* and S.S. CHIRAYATH, “Developing a Mathematical Scheme to Combine Single-Parameter Perturbation Results in Radiation Transport Calculations to Predics Joined Paremeter Perturbations,” Transactions of American Nuclear Society, 113 (1), 988-991, October, (2015).

7. M.W. SWINNEY* and S. S. CHIRAYATH, “Comparison of FBR and HFIR Monte-Carlo Simulations with Validation from Gamma Spectroscopy in Support of the NFASP Project,” Transactions of American Nuclear Society, 111 (1), 999-1001, November, (2014).

8. R.A. ELMORE*, S. S. CHIRAYATH, and S. EDREEV, “Proliferation Resistance Analysis of Nuclear Fuel Cycle Facilities to Quantify the Importance of Containment, Surveillance and Physical Protection Systems,” Transactions of American Nuclear Society, 111 (1), 1006-1009, November (2014).

9. R. A. ELMORE*, W.S. CHARLTON, and S. S. CHIRAYATH, "Sensitivity Analysis with PRAETOR for Diversion of Plutonium Self-Protected with Pu-238", Transactions of American Nuclear Society, 109 (1), 999-1002, November, (2013).

10. E. KITCHER*, S.S. CHIRAYATH, "Neutronics Performance Analysis of a Small Modular Integral Pressurized Water Reactor," Transactions of American Nuclear Society, 108 (1), 844-845, June, (2013).

11. R. A. ELMORE*, W.S. CHARLTON, and S. S. CHIRAYATH, "Comparative Analysis of Nuclear Nonproliferation Proliferation Resistance Approaches," Transactions of American Nuclear Society, 107 (1), 805-808, November, (2012).

12. A. BINGHAM*, B. BRADLEY*, Y.ZHANG*, J. RAGUSA, S. S. CHIRAYATH, K. VIEROW, “Analysis of Advanced Fuel Assemblies for the LWRs”, Transactions of American Nuclear Society, 100 (1), 133-134, June, (2009).

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13. D.K. MOHAPATRA, K. DEVAN, S.S. CHIRAYATH, A. GUPTA, R.S. MODAK and P. MOHANAKRISHNAN, “Validation and Application of Transport Theory Methods for Predicting Neutron Detector Readings in FBR In-core Shields”, Contributed Paper towards PHYSOR-08, Interlaken, Switzerland, 14-19, September, (2008).

14. L. THILAGAM*, S.S. CHIRAYATH, K.V. SUBBAIAH, K. DEVAN, L. Young-Seok, V. Jagannathan, “Doppler Coefficient of Reactivity – Benchmark Calculations for Different Enrichments of UO2”, Joint International Topical Meeting on Mathematics and Computations and Super Computing in Nuclear Applications, M&C + SNA April 15-19, 2007, Monterey, California, USA, (2007).

J3. LIST OF OTHER PUBLICATIONS (NOT PEER REVIEWED)

(* indicates student)

1. K. PEEDICORD, S.S. CHIRAYATH and C.M. MARIANNO, “Preparing the Next Generation of Nuclear Security Professionals-the Technology/Policy Nexus,” International Conference on Nuclear Security: Commitments and Actions, Vienna, Austria, 5-9, December, (2016).

2. J.M. OSBRON* and S.S. CHIRAYATH, “Assessment of Inverse Techniques used in Forensics Attribution Analysis of Trace Nuclide Ratios in Weapons-grade Pluronium,” 57th Annual Meeting of the Institute of Nuclear Materials Management, Atlanta, Georgia, 24-28, July, (2016).

3. M. SHAH*, D.M. TROMBETTA, C. GARIAZZO, C.M. MARIANNO, and S.S. CHIRAYATH, “Developing a Radiological Surveillance Education Exercise at Texas A&M Unviersity,” 57th Annual Meeting of the Institute of Nuclear Materials Management, Atlanta, Georgia, 24-28, July, (2016).

4. M. A. HAWILA* and S.S. CHIRAYATH, “Methodology for Combined Nuclear Security and Safety Risk Analysis,” 57th Annual Meeting of the Institute of Nuclear Materials Management, Atlanta, Georgia, 24-28, July, (2016).

5. M. SUBBAIAH*, S.S. CHIRAYATH, et. al., “The Safeguards and Organizational Culture Workshop,” 57th Annual Meeting of the Institute of Nuclear Materials Management, Atlanta, Georgia, 24-28, July, (2016).

6. S.S. CHIRAYATH, and C.M. FOLDEN III, “Experimental and Computational Assessment of Fission Product Residue in Plutonium from Low-Burn-up Thermal Reactor Fuel and Inverse Analysis for Nuclear Forensics”, Proceedings of the 9th Annual DNDO-ARI Grantees Program Review, Georgia Tech Research Institute Conference Center, Atlanta, GA, USA, July 12-14, (2016).

7. J.M. OSBORN*, and S.S. CHIRAYATH, “Assessment of Inverse Techniques used in Forensics Attribution Analysis of Trace Nuclide Ratios in Weapons-Grade Plutonium”, Proceedings of the 9th Annual DNDO-ARI Grantees Program Review, Georgia Tech Research Institute Conference Center, Atlanta, GA, USA, July 12-14, (2016).

8. M. A. HAWILA*, S.S. CHIRAYATH, and W.S. CHARTON, “Nuclear Security Risk Evaluation Using Adversary Pathway Analysis Methodology for an Insider-Outsider Collusion Scenario,” 56th Annual Meeting of the Institute of Nuclear Materials Management, Indian Wells, California, 12-16 July, (2015).

9. S.S. CHIRAYATH and R.A. ELMORE*, “Nuclear Facility Insider and Outsider Threat Upgrades to Proliferation Resistance Analysis Tool, PRAETOR,” 56th Annual Meeting of the Institute of Nuclear Materials Management, Indian Wells, California, 12-16, July, (2015).

10. S.S. CHIRAYATH, C.M. FOLDEN III and D. R. BOYLE, “Nuclear Forensics Analysis of Separated Plutonium of foreign fuel cycles (NFASP) Project: Assessment of Unique Trace Elements

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and Isotope Ratios in Separated Plutonium from Low Burnup Nuclear Fuel”, Proceedings of the 8th DNDO-ARI Grantees Conference, University of Texas, Dallas, TX, USA, July 7-9, (2015).

11. M.W. SWINNEY*, and S.S. CHIRAYATH, “Experimental and Computational Assessment of Nuclide Ratios in Weapons-grade Plutonium Produced in a Fast Neutron Environment for Nuclear Forensics Analysis”, Proceedings of the 8th DNDO-ARI Grantees Conference, University of Texas, Dallas, TX, USA, July 7-9, (2015).

12. J.M. OSBORN*, T.M. COLES*, and S.S. CHIRAYATH, “Trace Fission Product Ratios for Nuclear Forensics Attribution of Weapons-Grade Plutonium Separated from Fuel Irradiated in Thermal and Fast Reactor Types”, Proceedings of the 8th DNDO-ARI Grantees Conference, University of Texas, Dallas, TX, USA, July 7-9, (2015).

13. T.K BHARDWAJ*, P. MENDOZA*, R. DU*, M. BENCOMO*, J.ALLRED*,M. SWINNEY*, C.M. FOLDEN III, and S.S. CHIRAYATH, “Determination of Decontamination Factor for Various Radioisotopes during the PUREX Process of Irradiated DUO2” Proceedings of the American Chemical Society Annual Meeting, Denver, Colorado, March 22-26, (2015).

14. S.S. CHIRAYATH, R. A. ELMORE*, W.S. CHARLTON, “Containment and Surveillance and Physical Protection Updates for Proliferation Resistance Analysis Using PRAETOR”, IAEA Symposium on International Safeguards, Vienna, Austria, October 20-24, (2014).

15. T.K BHARDWAJ*, J. ALLRED*, K. JONES*, P. MENDOZA*, R. DU*, C.M. FOLDEN III, and S.S. CHIRAYATH, “Nuclear Forensics Program at Texas A&M University”, Proceedings of the American Chemical Society Annual Meeting, San Francisco, California, August 10-14, (2014).

16. J.M. OSBORN*, T.M. COLES*, and S.S. CHIRAYATH, “Trace Fission Product Ratios for Nuclear Forensics Attribution of Weapons-Grade Plutonium Separated from Fuel Irradiated in Thermal and Fast Reactor Types,” 55th Annual Meeting of the Institute of Nuclear Materials Management, Atlanta, Georgia, 20-14 July, (2014).

17. S.S. CHIRAYATH, D.R. BOYLE, C. M. FOLDEN III, “Experimental and Computational Assessment of Unique Trace Elements and Isotopes Ratios in Plutonium from Depleted Uranium Irradiated in Fast Reactor Blankets”, Proceedings of the 7th DNDO-ARI Grantees Conference, Leesburg, VA, USA, June, (2014).

18. J.S. OSBORN*, T.M. COLES*, S.S. CHIRAYATH and W.S. CHARLTON“Trace Fission Product Ratios for Nuclear Forensics Attribution of Weapons-Grade Plutonium Separated from Fuel Irradiated in Thermal and Fast Reactor Types”, Proceedings of the 7th DNDO-ARI Grantees Conference, Leesburg, VA, USA, June, (2014).

19. M.W. SWINNEY* and S.S. CHIRAYATH, “Comparison of FBR and HFIR Monte-Carlo Simulations with Validation from Gamma Spectroscopy in Support of the NFASP Project”, Proceedings of the 7th DNDO-ARI Grantees Conference, Leesburg, VA, USA, June, (2014).

20. R. A. ELMORE*, W.S. CHARLTON, S. S. CHIRAYTH, "Nuclear Proliferation Connection Implications within an Agent-Based Modeling Environment," Computational Social Sciences Society of the Americas Annual Conference, Santa Fe, NM, 22-25 August, (2013).

21. S.S. CHIRAYATH, D.R. BOYLE, C. M. Folden III, “Experimental and Computational Assessment of Unique Trace Elements and Isotopes Ratios in Plutonium from Depleted Uranium Irradiated in Fast Reactor Blankets”, Proceedings of the 6th DNDO-ARI Grantees Conference, Leesburg, VA, USA, July-August, (2013).

22. A. KHUDOLEEVA*, S.S. CHIRAYATH, and W.S. CHARLTON, "Conceptual Development of the Remote Monitoring System for Safeguarding of the Dry Cask Storage Facilities," INMM 54th Annual Meeting, Palm Desert, California, USA, 14-18 July, (2013).

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23. J.M. OSBORN*, S.S. CHIRAYATH, and W.S. CHARLTON, "Neutronics Analysis of Fast Breeder Reactor Core to Support the Plutonium Fingerprinting for Forensics (PuFF) Project", INMM 54th Annual Meeting, Palm Desert, California, USA, 14-18 July, (2013).

24. G.R. SPENCE*, W. S. CHARLTON and S.S. CHIRAYATH, "NRX Reactor Spent Fuel Study," INMM 54th Annual Meeting, Palm Desert, California, USA, 14-18 July, (2013).

25. T.M. COLES*, S.S. CHIRAYATH, and W.S. CHARLTON, "Nuclear Forensics Signature Analysis of Thermal Reactor Produced Weapons-grade Plutonium," INMM 54th Annual Meeting, Palm Desert, California, USA, 14-18 July, (2013).

26. J.W. POSTON Sr, S.S. CHIRAYATH, P.V. TSVETKOV, C.M. MARIANNO, R.P. KELLY*, E. KITCHER*, “Radiation Shield Design and Dose Rate Analysis of the Independent Spent Fuel Dry Cask Storage Installtion at Commanche Peak Power Plant”, E.D., Health Physics Society 58 th Annual Meeting, Madison, Wisconsin, USA, 7-11, July, (2013).

27. T.M. MARTIN*, L. VASUDEVAN, S.S. CHIRAYATH, “Correlation between Thyroid Burden and Surface Dose Rate for Felines undergoing Thyroid Ablation Therapy with I-131”, Health Physics Society 58th Annual Meeting, Madison, Wisconsin, USA, 7-11, July (2013).

28. J.M. OSBORN*, T.M. COLES*, A.R. TWADDLE*, S.S. CHIRAYATH, and W.S. CHARLTON, "Nuclear forensics signature analysis of fast and thermal reactor produced weapons-grade plutonium," 245th ACS National Meeting and Exposition, New Orleans, Louisiana, USA, April 7-11, (2013).

29. R.A. ELMORE*, W.S. CHARLTON, S.S. CHIRAYATH, "Nuclear Proliferation Resistance Model Backgrounds and Method Comparative Analysis," 84th Annual National Technical Association Conference, Baltimore, MD, 19-21 September, (2012).

30. J.M. OSBORN*, T. M. COLES*, A. R. TWADDLE* and S. S. CHIRAYATH, “Neutronics Analysis of Fast Breeder Reactor Core to Support the Plutonium Fingerprinting for Forensics (PuFF) Project”, Proceedings of the 5th DNDO-ARI Grantees Conference, Leesburg, VA, USA, July 23-25, (2012).

31. N.G. CHANDREGOWDA*, S. S. CHIRAYATH and W. S. CHARLTON, “Assessment of the Fingerprinting Method for Verification of Spent Fuel in MACSTOR KN-400 CANDU Spent Fuel Dry Storage”, Proceedings of the 53nd Annual Meeting of the Institute of Nuclear Materials and Management, Orlando, Florida, USA, July 15-19, (2012).

32. R.A. ELMORE*, W.S. CHARLTON, and S.S. CHIRAYATH, “Proposed Benchmark Cases for Proliferation Risk Assessment Modeling”, Proceedings of the 53nd Annual Meeting of the Institute of Nuclear Materials and Management, Orlando, Florida, USA, July 15-19, (2012).

33. S.S. CHIRAYATH, D. R. BOYLE, C.M. FOLDEN III, “Experimental and Computational Assessment of Unique Trace Elements and Isotopes Ratios in Plutonium from Depleted Uranium Irradiated in Fast Reactor Blankets”, Proceedings of the 5th DNDO-ARI Grantees Conference, Leesburg, VA, USA, July 23-25, (2012).

34. A. KHUDOLEEVA*, G.M. PSHAKIN, V. FEDCHENKO, A. SOLODOV, O. MIKHAYLOVA, S.S. CHIRAYATH, “Safeguard Game – The IAEA Inspection in an Imaginary State”, Proceedings of the 52nd Annual Meeting of the Institute of Nuclear Materials and Management, Palm Desert, California, USA, July 17-21, (2011).

35. W.S. CHARLTON, D.R. BOYLE, S.S. CHIRAYATH, D. G. FORD, C. A. GARIAZZO*, C. M. MARIANNO, K. H. RAGUSA, A. SOLODOV, “Nuclear Nonproliferation and Safeguards Education at TAMU: Embracing Novel Teaching Practices”, Proceedings of the 52nd Annual Meeting of the Institute of Nuclear Materials and Management, Palm Desert, California, USA, July 17-21, (2011).

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36. C. A. GARIAZZO*, S.S. CHIRAYATH, “Advancing a Systems Optimization Tool for Monitoring Special Nuclear Material”, Proceedings of the 52nd Annual Meeting of the Institute of Nuclear Materials and Management, Palm Desert, California, USA, July 17-21, (2011).

37. J. JUSTINA*., C.M. MARIANNO, S.S. CHIRAYATH, “Radiation Transport Simulation Studies using MCNP for a Cow Phantom to Determine an Optimal Detector Configuration for New Livestock Portal”, Proceedings of the 56th Annual Meeting of the Health Physics Society, Palm Beach County Convention Center, West Palm Beach, Florida, June 26-30, (2011).

38. L. VASUDEVAN, W.D. REECE, S.S. CHIRAYATH, S. AGHARA, “Characterization of Neutron and Gamma Dose in the Irradiation Cell of Texas A&M University Research Reactor”, Proceedings of the ASTM 14th International Symposium on Reactor Dosimetry, Mt. Washington Resort, Bretton Woods, New Hampshire, USA, May 22-27, (2011).

39. C. A. GARIAZZO* and S.S. CHIRAYATH, “Developing A Systems Optimization Tool for Monitoring Special Nuclear Material”, Proceedings of the 33rd European Safeguards Research and Development Association (ESARDA) Annual Meeting, Helia Conference Hotel, Budapest, Hungary, 16-20, May, (2011).

40. W.S. CHARLTON, W. BANGERTH, D. R. BOYLE, S. S. CHIRAYATH, G. GAUKLER, C.M. MARIANNO, A. VEDLITZ, “SHIELD: A Framework for Evaluating and Guiding Nuclear Detection System Development”, 4th Annual Academic Research Initiative (ARI) Grantees Conference of the US-Department of Homeland Security-Domestic Nuclear Detection Office (DHS-DNDO), Westin Alexandria, Alexandria, Virginia, April 26-28, (2011).

41. G. GAUKLER, Y. DING, C. LI*., S. S. CHIRAYATH, “A Systems Framework for Modeling the Detection of Smuggled Nuclear Materials”, 4th Annual Academic Research Initiative (ARI) Grantees Conference of the US-Department of Homeland Security-Domestic Nuclear Detection Office (DHS-DNDO), Westin Alexandria, Alexandria, Virginia, April 26-28, (2011).

42. R.G. MCCLARREN, J. MADSEN, M.L. ADAMS, M.P. ADAMS, N. AMATO, N. CASTET, S.S. CHIRAYATH, W.D. HAWKINS, L. RAUCHWERGER, T. SMITH, “Deterministic Transport Capability for HEU Sources in Cargo Containers”, 4th Annual Academic Research Initiative (ARI) Grantees Conference of the US-Department of Homeland Security-Domestic Nuclear Detection Office (DHS-DNDO), Westin Alexandria, Alexandria, Virginia, April 26-28, (2011).

43. S.S. CHIRAYATH, W.S. CHARLTON, A. STAFFORD*, C. MYERS*, B. GODDARD*, J. ALFRED*, M. CARROLL*, M. STERNAT*, E. RAUCH, “Risk Informed Safeguards Integration Studies for a Fast Reactor Fuel Cycle”, Proceedings of the 51st Annual Meeting of the Institute of Nuclear Materials and Management, Baltimore, MD, USA, July 11-15, (2010).

44. C.A. GARIAZZO* and S.S. CHIRAYATH, “MCNP as a System Optimization Tool for the Texas A&M University Safeguards Laboratory”, Proceedings of the 51st Annual Meeting of the Institute of Nuclear Materials and Management, Baltimore, MD, USA, July 11-15, (2010).

45. S.S. CHIRAYATH, J. RAGUSA, P. NELSON, “Thorium Blended and regular MOX Burn-up Studies for Fast Reactor Fuel Cycle Safeguards”, Proceedings of the 50th Annual Meeting of the Institute of Nuclear Materials and Management, Tucson, AZ, USA, July 12-16, (2009).

46. S.S. CHIRAYATH, R. METCALF, J. RAGUSA and P. NELSON, “Assessment of Proliferation Resistance Requirements for Fast-reactor Fuel-cycle Facilities”, Proceedings of the 8th International Conference on Facility Operations – Safeguards Interface, Portland, Oregon, USA, March 30 to April 4, (2008).

47. S. BERA, S.S. CHIRAYATH, V. JAGANNATHAN, K.V. SUBBAIAH and S.M. LEE, “Fuel Depletion and Fission Product Buildup Analysis of VVER-1000 type Reactor of KKNPP project using ORIGEN-S Module of SCALE Code System”, Seventeenth National Symposium on Radiation Physics, NSRP-17, Kolkata, India November 14-16, (2007).

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48. S. BERA, S.S. CHIRAYATH and S.M. LEE, “Criticality Safety of Stacked Fast Reactor Fuel Sub-assemblies”, Seventeenth National Symposium on Radiation Physics, NSRP-17, Kolkata, India November 14-16, (2007).

49. L. THILAGAM*, S.S. CHIRAYATH, V. JAGANNATHAN and K.V. SUBBAIAH, “A VVER-1000 LEU and MOX Assembly Computational Benchmark Analysis using the Lattice Burn-up Code EXCEL”, Seventeenth National Symposium on Radiation Physics, NSRP-17, Kolkata, India November 14-16, (2007).

50. S.S. CHIRAYATH, L. THILAGAM*, S. BERA, V. JAGANNATHAN and S.M. LEE, “Steady State Fuel Cycle Analyses of KKNPP (VVER) with EXCEL-TRIHEX-FA Code System”, AERB-SRI Report No. AERB/SRI/20001/Restricted/SAR/01/REV-0, December 15, (2006).

51. S.S. CHIRAYATH, S. BERA, L. THILAGAM* and K.V. SUBBAIAH, “Photo-neutron flux and Dose Rate Estimations for a Thoria Bundle Immersed in Heavy Water”, Proceedings of the BARC golden jubilee DAE-BRNS national workshop, NWND-2006, Mangalore University, November 8-11, (2006).

52. S.S. CHIRAYATH, S. BERA, L. THILAGAM* and K.V. SUBBAIAH, “Photo-neutron flux and Dose Rate Estimations for a Thoria Bundle Immersed in Heavy Water”, AERB-SRI Report No. AERB/SRI/21001/SCR/01/REV-A, October (2006).

53. S. BERA, S.S. CHIRAYATH and S.M. LEE, “Criticality Safety of Stacked PFBR Fuel Sub-assemblies”, AERB-SRI Report No. AERB/SRI/20501/SCR/01/REV-A, October, (2006).

54. D. K. MOHAPATRA and S.S. CHIRAYATH, “Use of Source Subassemblies in Proto-type Fast Breeder Reactor for a Desirable Shutdown Count Rate with Availability of Detectors of 1 or 0.2 cps/nv Efficiency by Monte Carlo Calculation”, PFBR Design Report No. PFBR/01113/DN/1056-Rev-B, IGCAR, Kalpakkam, India, July 31, (2006).

55. S. BASKAR, S.S. CHIRAYATH, V. RAJAGOPAL, K.V. SUBBAIAH, R. INDIRA, “Computation of Gamma Dose Rates in Control Rooms of PFBR from Bottled Up Activity in RCB following CDA”, National Symposium on Radiation Physics, NSRP-16, Chennai, India, January 18-20, (2006).

56. L. THILAGAM*, S.S. CHIRAYATH and K.V. SUBBAIAH, “Effect of Water Content in Concrete on Transmission of Neutrons”, National Symposium on Radiation Physics, NSRP-16, Chennai, India, January 18-20, (2006).

57. D. K. MOHAPATRA and S.S. CHIRAYATH, “Use of Source Subassemblies in Proto-type Fast Breeder Reactor for a Desirable Shutdown Count Rate with Availability of Detectors of 1 or 0.2 cps/nv Efficiency by Monte Carlo Calculation”, D. K. Mohapatra and C. Sunil Sunny, PFBR Design Report No. PFBR/01113/DN/1056-Rev-A, IGCAR, Kalpakkam, India, December, (2005).

58. S. BASKAR, S.S. CHIRAYATH, V. RAJAGOPAL, K.V. SUBBAIAH, R. INDIRA, “Gamma Dose Mapping Studies at Various Locations from Bottled up Activity in RCB of PFBR following CDA”, National Conference on Occupational and Environmental Radiation Protection, Indian Association for Radiation Protection, IARP-NC-2005, Mumbai, India, November 23-25, (2005).

59. K. DEVAN*, P. ARUNA, G. MANIGANDAN, G. BHARANIDHARAN, K.V. SUBBAIAH, S.S. CHIRAYATH, S. GANESAN, “Monte Carlo Aided Dosimetric Comparison of LDR Sources”, 26th International Conference on Medical Physics and Radiation Safety, AMPICON-2005, 10-12, November, Chennai, India, (2005).

60. C.S. SUREKHA*, P. ARUNA, S. GANESAN, K.V. SUBBAIAH, S.S. CHIRAYATH,“Monte Carlo Aided Dose Mapping around Gold Plaque Opthalmic Irradiators using Ir-192 and I-125 Seeds”, 26th International Conference on Medical Physics and Radiation Safety, AMPICON-2005, 10-12, November, Chennai, India, (2005).

61. K. DEVAN*, P. ARUNA, G. MANIGANDAN, G. BHARANIDHARAN, K.V. SUBBAIAH, S.S. CHIRAYATH, S. GANESAN, “Monte Carlo Computation of Air-Kerma Strength and Dose Rate

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Constant for Various Brachy-therapy Sources”, 26th International Conference on Medical Physics and Radiation Safety, AMPICON-2005, 10-12, November, , Chennai, India, (2005).

62. S.S. CHIRAYATH, K.V. SUBBAIAH, G. JANAKIRAMAN, and L. THILAGAM*, “Neutron Dose Contribution to Patient from High Energy LINACs”, 26th International Conference on Medical Physics and Radiation Safety, AMPICON-2005, 10-12, November, Chennai, India, (2005).

63. K.V. SUBBAIAH, S.S. CHIRAYATH, G. JANAKIRAMAN, L. THILAGAM*, “Method of Approach for Beam Flattening Filter Design of Medical LINACs”, 26th International Conference on Medical Physics and Radiation Safety, AMPICON-2005, 10-12, November, Chennai, India, (2005) .

64. S.S. CHIRAYATH, K.V. SUBBAIAH, L.V. NARAYANA*, and K. V. REDDY, “Monte Carlo Simulation of 6 MV Medical LINAC and Dose Calculations in Water Phantom – Virtual Source Model Method”, World Congress on Medical Physics and Biomedical Engineering, Sydney, Australia, (2003)

65. S.S. CHIRAYATH, L.V. NARAYANA* and K.V. SUBBAIAH ,“Simulation of Electron Linear Accelerator Head for 6MV Photon Beam Dose Calculations in Water Phantom Using Monte Carlo Methods”, Proceedings of the 23rd Annual Conference on Medical Physics & Radiation Safety, AMPICON-2K2, SMS Medical College & Hospital, Jaipur, Rajasthan, India, 15-17, November, (2002).

66. H.K. DRAVID, R. INDIRA, R.A. AGRAWAL, M.V. GATHIBANDE, S.S. CHIRAYATH and K.V. SUBBAIAH,“Fast Reactor Bulk Shielding Benchmark-Inter Comparison of Calculations with Measurements”, BARC/2002/Restricted/011, BARC, Mumbai, (2002).

67. S.S. CHIRAYATH, S. BASKAR, R. SARANGAPANI and K.V. SUBBAIAH, “Transfer Arm Shield Design”, PFBR Design Report No. PFBR/DN/01115/1091 Rev. C, IGCAR, Kalpakkam, India, November, (2002).

68. K.V. SUBBAIAH and S.S. CHIRAYATH, “Mobile Shield Design for the West Beam Port of the KAMINI Reactor”, Proceedings of the First Asian and Oceanic Congress for Radiation Protection (AOCRP-1) on Radiation Protection Toward the New Horizon, Seoul, Korea, October 20-24, (2002).

69. S.S. CHIRAYATH and K.V. SUBBAIAH, “Monte Carlo Modeling of beam flattening filters of Medical Accelerators”, Proceedings of the Symposium on Measurement and Computational Techniques in Radiation Physics and Safety, Dept. of Physics, Visva-Bharati University, Santiniketan organized by ISRP, Kolkata Chapter during February 10-12, (2002).

70. K.V. SUBBAIAH and S.S. CHIRAYATH, “View-CXS: Neutron and Photon Cross-Sections Viewer”, Contributed for the fourteenth national symposium on radiation physics (NSRP-14) Guru Nanak University, Amritsar, November 1-3, (2001).

71. S.S. CHIRAYATH, S. BASKAR and K.V. SUBBAIAH and ,“Mobile Shield Design for the West Beam Port of the KAMINI Reactor”, Fourteenth national symposium on radiation physics (NSRP-14) Guru Nanak University, Amritsar, November 1-3, (2001).

72. S.S. CHIRAYATH and K.V. SUBBAIAH, Radiation Shield Design Evaluation for GE PET-trace Proton Cyclotron”, Seminar on Accelerator Safety Conducted by ISRP at Variable Energy Cyclotron Center, Kolkata, Nov. 16-17, (2000).

73. S.S. CHIRAYATH, T.S. SELVAKUMARAN and K.V. SUBBAIAH, “Comparison of Americium-Beryllium Neutron spectrum obtained using Activation Foil Detectors and NE-213 Spectrometer”, Proceedings of the 13th National Symposium on Radiation Physics, NSRP-13, Mangalore, India, Dec 21-23, (1999).

74. V.K. GUPTA and S.S. CHIRAYATH, “Assessment of Collective Radiation Dose Budget for PHWR Stations”, Proceedings of the IARP conference held at AMRITSAR, India (1997).

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75. V.K. GUPTA and S.S. CHIRAYATH, “Modeling of Radiation Field Build-up on Boiler Cabinets at Rajasthan Atomic Power Station”, Proceedings of the Symposium on Current trends of water chemistry of nuclear and thermal power plants and other related units, BARC, Mumbai, India (1995).

76. V.K. GUPTA, V. ANURADHA, and S.S. CHIRAYATH, “Development of Performance Safety Indices – An approach”, Proceedings of the IARP conference, held at BARC, Mumbai, India (1994).

77. V.K. GUPTA and S.S. CHIRAYATH “Fuel Integrity and Dose Control”, Proceedings of the IARP Conference, held at Kanpur, India (1993).