Modelling with EMPIRE nuclear reaction code and nuclear...

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 1 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

International Atomic Energy Agency

Modelling with EMPIRE nuclear reaction code and

nuclear data evaluation

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 2 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

� Background: ND for energy applications � New U-238 evaluation ¾ Nuclear reaction modelling in EMPIRE ¾ Differential data ¾ Integral and quasi-differential data

� Nuclear data validation using SPA cross sections and dosimetry libraries � Challenges

OUTLOOK

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 3 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

OECD/NEA WPEC Subgroup 26 Final Report: “    Uncertainty  and  Target  Accuracy  Assessment  for  

Innovative Systems Using Recent Covariance Data Evaluations",

M. Salvatores (coordinator), R. Jacqmin (monitor), Technical report NEA No. 6410, OECD 2008.

Do we need another 238U evaluation?

The request for improved cross sections and emission spectra and their accuracies for neutron induced reactions on 238U is an important issue that emerges in several of cases studied. High accuracy requirements were placed on inelastic cross-sections 238U(n,inl) in the whole energy range up to 20 MeV …

A. Santamarina, ND-2013, target uncertainty 5% (current ~ 15%)

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 4 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

IAEA STD 235U(n,f)

Rat

io to

IAE

A 23

5 U(n

,f) S

TD

±3V (2.4%)

Unc

ert [

%]

Evaluated 235U(n,f) vs. STD cross section

235U(n,f) SPA(252Cf) = 1224 ± 5 (0.4%)

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 5 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

DOES EVAL.FISSION AGREES with STDs?

238U(n,f) SPA in 252Cf = 318.5 (0.6%)

~ 3.6% = 3V

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 6 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

A.J. Plompen, T. Kawano and RC, Technical report INDC(NDS)-0597 ( IAEA,Vienna,2012) http://www-nds.iaea.org/publications/indc/indc-nds-0597.pdf

IAEA TM 2011

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 7 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

A.J. Plompen, T. Kawano and RC, Technical report INDC(NDS)-0597 ( IAEA,Vienna,2012) http://www-nds.iaea.org/publications/indc/indc-nds-0597.pdf

238U(n,f) and 238U(n,J) – fitted in STD 238U(n,γ) SPA in 252Cf: 67.5 ± 0.7 mb (1.0%) 238U(n,f) SPA in 252Cf: 318.5 ± 2.1 mb (0.6%)

IAEA TM recommendations 238U(n,inl)

238U is the ideal test nucleus for elastic/inelastic studies

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 8 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

First problem: Elastic and inelastic cross sections

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 9 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

Continuum ~ 1.3 MeV Discrete Lev.

DISCREPANCIES in 238U(n,inl)

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 10 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

DISCREPANCIES in 238U(n,inl)

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 11 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

+ recent relevant modelling advances � Dispersive Lane consistent coupled-channel OMPs*: neutron inelastic scattering to discrete levels; � DIR-CN interference effects (as predicted by Moldauer); � neutron inelastic scattering treatment; � improved fission formalism (descriptive capability) *J.M. Quesada et al., EPJ Web of Conferences 42 02005 (2013) J.M. Quesada et al., ND2013 conference

Nuclear Data Sheets 108 (2007) 2655

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 12 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

+ recent relevant modelling advances � Dispersive Lane consistent coupled-channel OMPs*: neutron inelastic scattering to discrete levels; � DIR-CN interference effects (as predicted by Moldauer); � neutron inelastic scattering treatment; � improved fission formalism (descriptive capability) *J.M. Quesada et al., EPJ Web of Conferences 42 02005 (2013) J.M. Quesada et al., ND2013 conference

Nuclear Data Sheets 108 (2007) 2655

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 13 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

DCCOMP: rigid rotor with soft-rotor corrections

238U

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 14 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

nonelastic cross sections

VR - V2+ - V4+

VR

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 15 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

0.72 MeV 1.50 MeV 2.50 MeV 3.40 MeV 4.50 MeV

5.50 MeV 5.90 MeV 7.50 MeV 8.10 MeV 9.06 MeV

10.0 MeV 14.1 MeV

238U(n,el) 238U(n,scatt)

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 16 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

Impact of octupolar band

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 17 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

Inelastic angular distributions En=1.5 MeV

2+ 45 keV

4+ 148 keV

1- 680 keV

3- 732 keV

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 18 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

total (and 1st lev) inelastic cross sections

CN-DIR Interf.

DCCOMP + mult. band coupling

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 19 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

+ recent relevant modelling advances � Dispersive Lane consistent coupled-channel OMPs*: neutron inelastic scattering to discrete levels; � DIR-CN interference effects (as predicted by Moldauer); � neutron inelastic scattering treatment; � improved fission formalism (descriptive capability) *J.M. Quesada et al., EPJ Web of Conferences 42 02005 (2013) J.M. Quesada et al., ND2013 conference

Nuclear Data Sheets 108 (2007) 2655

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 20 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

0.1 1

500

1000

1500

2000

2500

3000 dir-CN interference

elastic 1st level (44.9) 2nd level (148)

no interference elastic 1st level (44.9) 2nd level (148)

cros

s se

ctio

ns [m

b]

energy [MeV]

new physics: DIR-CN interference Engelbrecht-Weidenmuller

transformation [1]

[1]  C.A.  Engelbrecht,  H.A.  Weidenmuller,  “Hauser--Feshbach theory and Ericson fluctuations  in  the  presence  of  direct  reactions”,  Phys.Rev.  C8 (1974) 859-862

(n,n1)

(n,el)

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 21 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

+ recent relevant modelling advances � Dispersive Lane consistent coupled-channel OMPs*: neutron inelastic scattering to discrete levels; � DIR-CN interference effects (as predicted by Moldauer); � neutron inelastic scattering treatment; � improved fission formalism (descriptive capability) *J.M. Quesada et al., EPJ Web of Conferences 42 02005 (2013) J.M. Quesada et al., ND2013 conference

Nuclear Data Sheets 108 (2007) 2655

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 22 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

elastic P-bar (P1 component)

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 23 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

Elastic angular distribution 720 keV

impact on reflectors

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 24 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

Neutron emission spectra (2-6 MeV)

2.03 MeV

4.25 MeV

6.02 MeV

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 25 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

+ recent relevant modelling advances � Dispersive Lane consistent coupled-channel OMPs*: neutron inelastic scattering to discrete levels; � DIR-CN interference effects (as predicted by Moldauer); � neutron inelastic scattering treatment; � improved fission formalism (descriptive capability) *J.M. Quesada et al., EPJ Web of Conferences 42 02005 (2013) J.M. Quesada et al., ND2013 conference

Nuclear Data Sheets 108 (2007) 2655

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 26 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

~ 0.9 MeV

The origin of the nuclear energy is the difference of binding energy

Hill-Wheeler formula for the Transmission coefficient through a parabolic barrier:

Transmission coefficients

Vf

E

Efi ħωi

Parabolic barrier

¸¹·

¨©§ ��

)E(E

ωπ *

fii

iT!

2exp1

1

FISSION PROCESS

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 27 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

E

Vf

Vf

Vf

E

E

light actinides(Th)

medium actinides(Pu)

heavy actinides(Cf)

FISSION BARRIERS

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 28 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

Vf

E

Vf

E

Vf

E

BA

Babsdir

inddirf

TTTTT

TTT

��

�

BCA

BCabsdir

inddirf

TTTTT

TTT

��

�

21 indind

dirf

TTTT�

�

imaginary part: ]*[ fVEW �� D

2

22

22 )1(

TTeTeTT dirabs

���

� GG

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 29 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

30

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 31 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

Using integral data (keff ) in the

evaluation

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 32 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

NEA ICSBEP criticality benchmarks

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 33 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

Using quasi-differential data in the evaluation

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 34 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

RPI experimental setup

International Workshop on Elastic and Inelastic Scattering, WINS2012, Boston, 17-19 Sept. 2012

simple & easy to model geometry

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 35 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

(n,f) (n,2n)

(n,el)

Angle dependent cross sections: 290

(n,n’)  cont

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 36 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

RPI benchmark: 290

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 37 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

Angle dependent cross sections:1530

(n,n’)  cont

(n,f)

(n,2n) (n,el)

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 38 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

RPI benchmark: 1530

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 39 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

OTHER CHALLENGES: PFNS

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 40 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

OTHER CHALLENGES: 235U th.nubar

Frehaut & Shackleton p.201 www-nds.iaea.org/publications/proceedings/Physics-and-Chemistry-of-Fission-1973-Vol-II.pdf

Q(252Cf)=3.782

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 41 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste

� Reaction modelling of neutron scattering on 238U nucleus � Dispersive CC OMP coupling all levels up to En=1 MeV � Use of integral and quasi-differential benchmarks as part of the evaluation process � EMPIRE advanced Hauser-Feshbach treatment includes: � Dispersive coupled-channel optical models � CN anisotropy � Direct effects on the CN emission � Multi-humped fission barrier with absorption

� Additional data challenges: PFNS and nubar

SUMMARY

Roberto Capote, r.capotenoy@iaea.org IAEA Nuclear Data Section 42 Joint ICTP-IAEA Workshop on Nuclear Reaction Data

for nuclear power applications, 22-26 Sept. 2014, Trieste