Submittal of Environmental Compliance Status Report (ECSR ...U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Paducah Gaseous Diffusion Plant (PGDP) Portsmouth Gaseous

USEC\A Global Energy Company

November 16, 2006GDP 06-0054

Mr. Jack R. StrosniderDirector, Office of Nuclear Material Safety and SafeguardsAttention: Document Control DeskU.S. Nuclear Regulatory CommissionWashington, D.C. 20555-0001

Paducah Gaseous Diffusion Plant (PGDP)Portsmouth Gaseous Diffusion Plant (PORTS)Docket Nos. 70-7001 and 70-7002Certificate Nos. GDP-1 and GDP-2Submittal of Environmental Compliance Status Report (ECSR) Related Information

Dear Mr. Strosnider:

On January 16, 2001, representatives from USEC and the NRC Staff met at NRC headquarters todiscuss the Environmental Compliance Status Report (ECSR) contained in Volume 3 of the PGDPand PORTS Certification Applications. As a result of this January meeting, USEC committed (Seethe Reference) to provide copies of the PGDP and PORTS Quarterly Radiological MonitoringDischarge Reports for plant outfalls. Enclosures I and 2 provide the third-quarter calendar year 2006reports for PGDP and PORTS, respectively.

Should you have any questions or require additional information, please contact Mark Smith at (301)564-3244. There are no new commitments contained in this submittal.

Sincerely,

Steven A. ToelleDirector, Regulatory Affairs

USEC Inc.6903 Rockledge Drive, Bethesda, MD 20817-1818

Telephone 301-564-3200 Fax 301-564-3201 http://www.usec.com

Mr. Jack R. StrosniderNovember 16, 2006GDP 06-0054, Page 2

Reference: Letter from Steven A. Toelle (USEC) to Mr. Michael F. Weber (NRC), PaducahGaseous Diffusion Plant (PGDP), Portsmouth Gaseous Diffusion Plant (PORTS),Docket Nos. 70-7001 and 70-7002, "Environmental Compliance Status Report (ECSR)Related Information," GDP 0 1-0018, dated March 26, 2001.

Enclosures: 1. PGDP Quarterly Radiological Discharge Monitoring Report-Third Quarter 20062. PORTS Quarterly Radiological Discharge Monitoring Report-Third Quarter 2006

cc: J. Henson, Chief, Fuel Facility Inspection, NRC Region IIM. Thomas, NRC Senior Resident Inspector, PGDPD. Martin, NRC Project Manager

Enclosure 1GDP 06-00544 Pages Total

PGDP Quarterly Radiological Discharge Monitoring ReportThird Quarter 2006

Plant Radiological Discharges to Surface WaterCalendar Year 2006 - 3rd Quarter

United States Enrichment Corporation (USEC)Paducah Gaseous Diffusion Plant, Paducah, Ky

Outfall 002

ConcentrationsDissolved Suspended

Date Alpha Beta Alpha Beta U U 235 Tc 99 Th 230 Np 237 Pu 239/240Sampled I pCi/I pCi/I p/Ci/I pCi/I ug/l wt. % pCi/I pCi/I pCi/I pCi/L7/5/2006 I < 4.39 7.4 < 4.15 < 6.24 2.00 NA < 20.1 < 0.223 < 0.687 < 0.147

Outfall 008

Concentrations

Dissolved SuspendedDate Alpha Beta Alpha Beta U U 235 Tc 99 Th 230 Np 237 Pu 239/240

SampledI pCi/I pCi/I p/Ci/I pCi/I ug/l wt. % pCi/I pCi/I pCi/I pCi/L9/25/2006 I < 5.34 12.4 < 5.81 < 7.0 8.00 NA < 17.4 < 0.258 < 0.828 < 0.146

Outfall 009


Date Alpha Beta Alpha Beta U U 235 Tc 99 Th 230 Np 237 Pu 239/240SampledI pCi/I pCi/I p/Ci/I pCi/I ug/l wt. % pCi/I pCi/I pCi/I pCi/L9/25/2006 < 5.38 < 7.83 < 4.72 < 7.09 < 1 NA < 17.4 < 0.234 < 0.828 < 0.143

1 of 3



Outfall 010


Date Alpha Beta Alpha Beta U U 235 Tc 99 Th 230 Np 237 Pu 239/240SampledI pCi/I pCi/I p/Ci/I pCi/I ugl/ wt. % pCi/I pCi/I pCi/I pCi/L9/25/2006 < 5.81 13.2 < 4.69 < 7.03 10.00 NA < 17.4 < 0.239 < 0.828 < 0.142

Outfall 01l


Date Alpha Beta Alpha Beta U U 235 Tc 99 Th 230 Np 237 Pu 239/240Sampled pCi/I pCi/I p/Ci/I pCi/I ug/l wt. % pCi/I pCi/I pCi/I pCi/L7/5/2006 10.2 13.7 < 4.15 < 6.16 47 0.185 < 20.1 < 0.235 < 0.687 < 0.1467/10/2006 40 0.191 < 19.17/27/2006 260 0.181 < 20.18/1012006 30 0.191 <19.79/18/2006 120 0.187 <20.6

Outfall 012


Date Alpha Beta Alpha Beta U U 235 Tc 99 Th 230 Np 237 Pu 239/240Sampled pCi/I pCi/I p/Ci/l pCi/I ug/l wt. % pCi/I pCi/I pCi/I pCi/L7/5/2006 < 4.38 < 6.75 < 4.15 < 6.18 3.00 NA < 20.1 <.236 < 0.687 < 0.144

2 of 3



Outfall 013


Date Alpha Beta Alpha Beta U U 235 Tc 99 Th 230 Np 237 Pu 239/240SampledI pCi/I pCi/I p/Ci/I pCi/I ug/l wt. % pCi/I pCi/I pCi/I pCi/L7/5/2006 < 4.34 < 6.70 < 4.15 < 6.13 < 1 NA < 20.1 < 0.239 < 0.687 < 0.143

Outfall 016


Date Alpha Beta Alpha Beta U U 235 Tc 99 Th 230 Np 237 Pu 239/240SampledI pCi/I pCi/I p/Ci/Il pCi/I ug/l wt. % pCi/I pCi/I pCi/I pCi/L7/5/2006 < 4.26 < 6.59 < 4.15 < 6.12 4.00 NA < 20.1 < 0.231 < 0.687 < 0.145

3 of 3

Enclosure 2GDP 06-0054

12 Pages Total

PORTS Quarterly Radiological Discharge Monitoring ReportThird Quarter 2006


United States Enrichment Corporation (USEC)Portsmouth Gaseous Diffusion Plant, Piketon, Ohio

Outfall 001 I X-230J-7 East Holding Pond

ConcentrationsAlphapCi/t

BetapCi/I

TcpCitl

Uu/ll

AlphamCi

LoadingsBetamCi

Tc

mCiUka

713/20067/10/20067/17/20067124/20067/31/20068/7/2006

8114/20068/21120068/28/20069/4/2006

9/11/20069/18/20069/25/2006

TotalAverage

MaximumMinimum

< 3.2< 3.3< 3.9< 4.5< 4.0

5.8< 4.1< 4.9< 3.6< 5.1< 5.5

2.7< 4.3

< 54.9< 4.2

5.8< 2.7

7768786765678

99999

9999999

0.290.340.390.320.210.200.190.220.190.280.250.590.69

4.160.320.690.19

0.02b0.0300.0390.0360.0200.1840.0160.0190.0160.0260.0230.1160.115

0.6630.0510.1840.016

< 0.186< 0.183< 0.166< 0.248< 0.207< 0.243< 0.148< 0.171< 0.150< 0.144< 0.154

0.3100.374

< 2.686< 0.207

0.374< 0.144

0.240.230.280.290.250.280.220.230.230.240.230.400.45

3.560-270.450.22

0.00!0.0090.0110.0100.0060.0060.0050.0060.0050.0080.0070.0250.033

0.1380.0110.0330.005

< 88< 7

8< 5

118999

Transuranics1001080106

Am 241 Np 237 Pu 238 Pu 239+240< 0.021 < 0.079 < 0.054 < 0.054

Ohio EPA Permit No. OIS00023*BD Page I of 11 Reporl Date: 10/2512006



Outfall 002 / X-230K South Holding Pond

ConcentrationsAlphapCivl

BetapCi/I

TcpCi/I

Uuall

AlphamCi

LoadingsBetamCi

TcmCi

Uko

- a ____________________________________

7/3/20067/10120067/17/20067/24120067/3112006817/2006

8/14/20068/21/20068/28/20069/4/2006

9/11/20069/18/20069/25/2006

TotalAverage

MaximumMinimum

5.25.26.77.06.17.56.57.95.27.47.83.76.1

82.36.37.93.7

< 89

< 6< 8

10

< 8< 7< 7< 6< 6< 6

< 5< 6

< 92< 7

10< 5

9999999999999

118999

1.201.000.980.870.790.770.750.810.710.690.670.610.57

10.420.801.200.57

0.00030.00390.00900.00480.00310.00480.00280.00340.00290.00330.00240.00600.0063

0.05300.00410.00900.0003

< 0.0040.056

< 0.093< 0.074

0.067< 0.086< 0.041< 0.051< 0.043< 0.045< 0.036< 0.090< 0.104

< 0.790< 0.061

0.104< 0.004

AAAAAAAAAAAAAAAAAAAAAAAAAA

AAAAAAAA

0.00060.00640.01500.00800.00520.00800.00470.00560.00480.00560.00400.01000.0105

0.08840.00680.01500.0006

Transuranics'002080106

Am 241 Np 237 Pu 238 Pu 239+240< 0.054 < 0.085 < 0.024 < 0.058

Ohio EPA Permit No. 01S00023*BD Page 2 ofll1 Report Date: 10/25/2006



Outfall 0031 X-6619 Sewage Treatment Plant

ConcentrationsAlpha

pC1iIBetapCi/I

TcoCi/l

Uuc/I

AlphamCi

LoadingsBetamCi

TcmCi

Ukg

- a __________________________________

7/3t20067/10,/20067/17/20067/24/20067/31/20068/7/2006

8114120068/21/20068/28/20069/4/2006

9/11/20069/18/20069/2512006

TotalAverage

MaximumMinimum


,<

C

12.810.06.614.08.35.84.95.95.116.223.720.426.8

68598893577020677136364088

791619320

93681141137189247996373637108

9637411424

7.168.905.837-294.624.631.702.602.969.4010.309.8712.70

87.966.77

12.701.70

0.1000.0690.0540.1050.0610.0430.0360.0410.0360.1350.1760.1800.233

1.2690.0980.2330.036

0.530.410.720.690.420.520.150.470.500.300.260.350.77

6.090.470.770.15

0.730.470.930.850.520.660.180.550.670.310.270.320.94

7.390.570.940.18

0.0560.0610.0470.0550.0340.0350.0130.0180.0210.0780.0760.0870.110

0.6920.0530.1100.013

< 160.5< 12.3

26.8< 4.9

Am 241 Np 237 Pu 238 Pu 239+240< 0.051 < 0.065 < 0.065 < 0.065

Ohio EPA Permit No. 01S00023*BD Page 3 of 11 Report Date- 10/2,512006



Outfall 004 1 Cooling Tower Blowdown

ConcentrationsAlphapCi/I

BetapCi/I

TcpCi/I

Uuq!I

AlphamCi

LoadingsBetamCi

TcmCi

Uka

7/3/20067/10/20067117/20067/24/20067/31/2006817/2006

8114/20068/21/20068/28/20069/4/2006

9111/20069/18/20069/25/2006

TotalAverage

MaximumMinimum


383.74.25.24.55.34.55.63.95.55.92.84.9

59.84.65.92.8

17161014212115171616161619

214162110

9999999

999999

118999

U.890.720.570.590.910.530.460.500.610.460.410.420.42

7.490.580.910.41

U.0110.0100.0080.0090.0130.0080.0070.0090.0100.0050.0060.0060.006

0.1080.0080.0130.005

0.360.380.240.330.490.520.350.500.440.310.380.410.48

5.200.400.520.24


AAAAAAAA

0.0190.0170.0140.0140.0210.0130.0110.0140.0170.0090.0100.0110.011

0.1800.0140.0210.009

Am 241 Np 237 Pu 238 Pu 239+240< 0.020 < 0.125 < 0.020 < 0.090

Ohio EPA Permit No. OIS00023*BD Page 4 ofll1 Report Date- 10/2512006



Outfall 005! X-61B1 Lime Sludge Lagoon


BetapCi/I

TcpCill

UugA

AlphamCi

LoadingsBetamCi

TcmCi

Ukg

7/3120067/10/20067/17/20067/24120067131/20068/7/2006

8/14120068/21/20068/28/2006914/20069/11/20069118/20069/25/2006

TotalAverage

MaximumMinimum

ALALALALALALALALALALALALAL

ALALALAL


ALALALAL


ALALALAL


ALALALAL

ALALALALALAL.ALALALALALAL.AL

AL.ALALAL


ALALALAL


ALALALAL


ALALALAL

TransuranicsNA

Am 241 Np 237 Pu 238 Pu 239+240

Ohio EPA Permit No. OIS00023 tBD Page 5 ofll1 Report Date: 10/2512006



Outfall 009 / X-230L North Holding Pond


BetapCi/I

TcpCiii

UugIl

AlphamCi

LoadingsBetamCi

TcmCi

UkcI

7/3/20067/10/20067/17/20067/24/20067/31120068/7/20068/14/20068/21120068/28/20069/4/20069/111/20069/18/20069/25/2006

TotalAverage

MaximumMinimum

3.73.8

< 4-1< 4.7< 4.2< 4.8< 4.2< 5.0< 3.6< 5.2< 5.5

5.3< 4.5

< 58.6< 4.5< 5.5< 3.6

< 7< 7< 6< 8< 7< 8< 6< 7< 6< 5< 6

912

< 94< 7

12< 5

9999999999999

118999

4.194.064.083.924.262.673.423.203.864.875.886.735.91

57.054.396.732.67

O U250.0200.0200.0190.0140.0120-0140-0080.0110.0160.0160.0680.038

0.2810.0220.0680.008

< 0.049< 0.040< 0.046< 0.061< 0.039< 0.055< 0.040< 0.029< 0.028< 0.030< 0.026

0.1220.125

< 0.690< 0.053

0.125< 0.026


AAAAAAAA

0.0280.0220.0330.0310.0230.0190.0230.0130.0180.0270.0260.0870.064

0.4160.0320.0870.013


Am 241 Np 237 Pu 238 Pu 239+240< 0.019 < 0.057 < 0.031 < 0.021

Ohio EPA Permit No. 01S00023"BD Page 6 of 11 Report Date- 10/25/2006



Outfall 010 ! X-230J-5 Northwest Holding Pond


BetapCi/I

TcpCi/I

Uugll

AlphamCi

LoadingsBetamCi

Tcmci

Ukg

7/3/20067/10/20067/17/20067/24120067/31/2006817/20068/14120068/21/20068/28/20069/4/2006

9/11/20069/18/20069125/2006

TotalAverageMaximumMinimum


3.53.44.14.84-24.94.25.23.75.35.72.64.7

56.34.35.72.6

< 7< 7< 6

14< 7< 8< 6< 7< 6

6< 6

97

< 95< 7

14< 6

9999999999999

118999

1.3U1.241.391.200.960.670.760.760.641.661.812.252.40

17.041.312.400.64

0-00650.00630.00660.00570.00360.00300.00290.00290.00250.00630.00500.01600.0190

0.08640.00660.01900.0025

< 0.061< 0.062< 0.045

0.112< 0.046< 0.057< 0.039< 0.043< 0.040

0.036< 0.027

0.1010.088

< 0.757< 0.058

0.112< 0.027


AAAAAAAA

0.0110.0110.0110.0100.0060.0050.0050.0050.0040.0110.0080.0270.032

0.1440.0110.0320.004

Am 241 Np 237 Pu 238 Pu 239+240< 0.057 < 0.0856 < 0.074 < 0.058

Ohio EPA Permit No. OIS00023*BD Page 7 ofll1 Report Date- 10/25/2006



Outfall 011 / X-230J-6 Northeast Holding Pond

ConcentrationsAlphapCi/l

BetapCi/I

TcpCi/I

Uug/h

AlphamCi

LoadingsBetamCi

TcmCi

Ukg

7/3/20067110120067/17/20067/24/20067/31/20068/7/2006

8/14/20068/21120068/28/20069/4/2006

9/11/20069/18/20069/25/2006

TotalAverage

MaximumMinimum


< 3.5< 3.6< 4.2< 4.7< 4.3< 5.1< 4.4< 5.2< 3.8< 5.5< 5.7

2.9< 4.4

< 57.3< 4.4< 5.7

2.9

7768786765655

84685

9999999999999

118999

0 520.710.510.460.510.440.450.400.190.610.450.790.79

6.830.530.79019

0.000110.000080.000050.000090.000020.000100.000020.000020.000010.000020.000040.003050.00064

0.004240.000330.003050.00001

< 0.0027< 0.0014< 0.0009< 0.0024< 0.0006< 0.0028< 0.0004< 0.0006< 0.0003< 0.0002< 0.0009< 0.0055< 0.0073

< 0.0261< 0.0020

0.0073< 0.0002


AAAAAAAA

0.000190.000130.000080.000150.000040.000160.000030.000030.000010.000030.000070.000840.00106

0.002820.000220.001060.00001

Am 241 Np 237 Pu 238 Pu 239+240< 0.055 < 0.059 < 0.059 < 0.059

Ohio EPA Permit No. 01S00023*BD Page 8 ofll1 Report Date: 10/25/2006



Ouffall 012 1 X-2230M Southwest Holding Pond


BetapCi/I

TcpCi/l

UuI/I AlphamCi

LoadingsBetamCi

TcmCi

Uka

7/3/20067/10/20067117/20067/24120067/31/20068/7/2006

8/14120068/21/20068/28/20069/4/2006

9/11/20069/18/20069/25/2006

TotalAverage

MaximumMinimum

TransuranicsNA

4.54.54-44.94-97.76.97.83.13.13.83.63.5

62.74.87.83.1

5556666677555

75675

99999999999109

1199109

1.351.231.191.020.911.151.130.960.980.840.750.660.59

12.760.981.350.59

0.00120.00110.00240.00080.00030.00170.00040.00030.00050.00050.00040.00200.0022

0.01390_00110.00240.0003

0.00770.00820.01810.00810.00390.01460.00360.00300.00620.00730.00470.02270.0282

0.13620.01050.02820.0030


AAAAAAAA

0.00200.00190.00410.00130.00060.00280.00070.00050.00090.00090.00070.00330.0037

0.02320.00180.00410.0005

Am 241 Np 237 Pu 238 Pu 239+240

Ohio EPA Permit No. 01S00023*BD Page 9 ofll Report Date: 10/25/2006



Outfall 013 i X-2230N West Holding Pond


BetapCi/I

TcpCi/I

Uug!I

AlphamCi

LoadingsBetamCi

TcmCi

Ukg

7/3/20067/10/20067/17/20067/24120067131/20068/7/2006

8/14/20068/21/20068/28/20069/4/2006

9/11/20069/18/20069125/2006

TotalAverage

MaximumMinimum

< 4.6< 4.4< 4-2< 4.9

8.6< 7.5< 7.1< 7.2< 3.2

3.5< 3.9< 3.5< 3.5

< 66.1< 5.1

8.6< 3.2

Am 241

< 5< 5< 5< 6< 6< 6< 6< 6< 7< 7

7< 5< 5

< 76< 6

7< 5

9999999999999

118999

0.590.540.540.610.650.510.290.51

< 0.640.540.380.41

< 6.92< 0.53

0.710.29

U.UUU(0.00020.00760.00070.00450.00070.00030.00020.00040.00580.00040.00160.0014

0.02450.00190.00760.0002

0.UM90.0030.1230.0120.0030.0110.0060.0060.0100.0120.0080.0310.025

0.2600.0200.1230.003


AAAAAAAA

U.UL120.00040.01270.00110.00030.00120.00050.00030.0007

< 0.00110.00070.00260.0023

< 0.0250< 0.0019

0.01270.0003

TransuranicsNA

Np 237 Pu 238 Pu 239+240

Ohio EPA Permit No. 01S00023*BD Page 10 of 11 Report Date: 10/2512006



NOTES

Weekly concentrations and loadings with quarterly summaries are presented for Gross Alpha Activity, Gross Beta Activity, Technetium-99 (beta) Activity and TotalUranium Concentration. These figures are based on seven-day composite samples and measured flows at each outfall except at Outfall 005. Since Outfall 005historically has no discharge, there is no composite sampler there and effluent data is based on grab samples and manual measurements taken when there is anactual discharge.

Starting in May, 2006, USEC began monitoring weekly radiological discharges at Outfalls 012 and 013 in accordance with the NRC License for the Lead Cascadeof the American Centrifuge Plant. These two outfalls remain under the control of DOE and regulated under DOE's NPDES Permit. USEC is reporting the resultsof its weekly monitoring voluntarily. DOE is continuing its own monitoring and reporting in accordance with its Permit.

Quarterly concentrations are presented for Americium-241, Neptunium-237, Plutonium-238, Plutonium 239 and Plutonium 240 for the USEC Outfalls. (All of theseare transuranics. Plutonium 239 and Plutonium 240 activities are reported as a combined activity because they emit substantially identical radiation.) Thesefigures are based on quarterly grab samples.

Weekly concentrations that are below the Minimum Detectable Activity (MDA) or Laboratory Limit of Detection (LLD) are indicated by a "less than" (<) prefix aheadof the numerical MDAILLD. MDA/LLDs vary somewhat from day to day and from outfall to outfall depending on interferences present and other conditions.

Weekly loadings that correspond to less than MDA/LLD concentrations are calculated based on the MDA/LLD value and prefixed with a "<" except as follows:Technetium loadings at Outfalls 002, 004, 005, 009, 010, 011, 012, and 013 are presumed to be zero unless actually detected, based on the historical absence oftechnetium in these outfalls. These loadings are coded as "AA" unless actually detected.

Loadings are not calculated for transuranics because measurable transuranic concentrations are not normally present in any USEC-leased outfall.

AA indicates no detectable concentration.

AL indicates no flow during the sampling period.

Ohio EPA Permit No. 01S00023*BD Page 11 of 11 Report Date: 10/25/2006

Documents

Submittal of Environmental Compliance Status Report (ECSR ...U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Paducah Gaseous Diffusion Plant (PGDP) Portsmouth Gaseous