ML12157A173

Response to Request for Additional Information on License Renewal Application Dated 04/23/2012

ML12157A173
Person / Time
Site:	Grand Gulf
Issue date:	05/23/2012
From:	Mike Perito Entergy Operations
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
GNRO-2012/00039
Download: ML12157A173 (22)

Text

'- Entergy Entergy Operations, Inc.

P. 0. Box 756 Port Gibson, MS 39150 Michael Petito Vice President, Operations Grand Gulf Nuclear Station Tel. (601) 437-6409 GNRO-2012/00039 May 23, 2012 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

REFERENCE:

Response to Request for Additional Information (RAI) Dated April 23, 2012 Grand Gulf Nuclear Station, Unit 1 Docket No. 50-416 License No. NPF-29 NRC Letter, "Request for Additional Information for the Review of the Grand Gulf Nuclear Station, License Renewal Application," dated April 23, 2012 (GNRI-2012/00094)

Dear Sir or Madam:

Entergy Operations, Inc is providing, in Attachment 1, the response to the referenced Request for Additional Information (RAI). References requested for docketing in the referenced RAI are included in Attachments 2 - 51. Based on discussion with Nuclear Regulatory Commission staff, it has been requested that each individual reference be assigned an accession number in ADAMS.

This letter contains no new commitments. If you have any questions or require additional information, please contact Christina L. Perino at 601-437-6299.

I declare under penalty of perjury that the foregoing is true and correct. Executed on the 23rd day of May, 2012.

Sineey

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!;ýr M--C,ýOe-( Pwf.46 MP/jas 6mpo G6iVs Attachment(s): (see next page)

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GNRO-2012/00039 Page 2 of 4 Attachment(s):

1. Response to Request for Additional Information (RAI)

2. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Patton, - Attachment A labeled "Radial Collector Well Data"

3. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Patton, - Attachment B labeled "Enercon Study Assessing Groundwater Drawdown and Related Impacts"

4. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Patton - Attachment D labeled 'Well Permits"

5. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Patton - Attachment E labeled "2005, 2008, 2009 and 2010 Annual Water Use Reports"

6. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Patton - Attachment I labeled "GGNS NPDES Permit Renewal Application (2007)"

7. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Patton - Attachment J labeled "GGNS Stormwater Permits"

8. From Diskette Labeled : Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit - Hydrology Patton - Attachment K labeled "Condition Reports"

9. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Patton - Attachment L labeled "Reporting Documentation - Unit 2 Sumps"

10. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Patton - Attachment P labeled 'Thermal Monitoring Procedural Protocols"

11. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Patton - Attachment Q labeled 'Thermal Monitoring Reports for Winter and Summer 2007"

12. ER Reference - GGNS (Grand Gulf Nuclear Station Units 1 and 2). 2003

13. ER Reference - MDEQ. 201 Oa. Mississippi Department of Environmental Quality, Office of Land and Water Resources, Water Well Drillers, Radial-Search, Wells. Email correspondence from Tommie Whitten MDEQ. September 1, 2010

14. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Patton - Hydrology Information Needs for the Grand Gulf Nuclear Station (GGNS)

License Renewal Environmental Review

15. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Ford - Attachment A labeled "Groundwater Well Figure"

16. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Ford - Grand Gulf Nuclear Site Needs List for Hydrology

17. Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit -

Hydrology Ford - Attachment E "CS&I Annual Drinking Water Quality Report"

18. ER Reference - Bechtel. 1986. Bechtel, Radial Wells 1, 3, 5 - Reduction of Multiple Well Test Data (Geotech Calc G-035). Approved July 31, 1986

19. ER Reference - Entergy. 2008a. Entergy Nuclear Fleet Procedure EN-CY-109, Sampling and Analysis of Groundwater Monitoring Wells, Revision 2. April 1, 2008

20. ER Reference - Entergy. 2008b. Entergy Nuclear Fleet Procedure EN-EV-106, Waste Management Program, Revision 2. August 18, 2008

21. ER Reference - Entergy. 2008h. Entergy Nuclear Waste Minimization Plan, Revision 1.

August 4, 2008

22. ER Reference - Entergy 2010e (NPDES CRs)

23. ER Reference - Entergy 2011 a (EN-CY-1 11) "Radiological Ground Water Monitoring Program" Attachment(s): (continued)

GNRO-2012/00039 Page 3 of 4

24. ER Reference - Entergy 201 lc (EN-EV-1 12) "Chemical Control Program"

25. ER Reference - GGNS. 2006c. Grand Gulf Nuclear Station, Storm Water Pollution Prevention Plan, Revision 13. July 2006

26. ER Reference - GGNS 2007a (Water Withdrawal Mod), Groundwater Withdrawal Permit Modification Grand Gulf Nuclear Station, Port Gibson, MS

27. ER Reference - GGNS 2007b (2006 WMP Report) Grand Gulf Nuclear Station 2006 Waste Minimization Certified Report

28. ER Reference - GGNS. 2010e. Grand Gulf Nuclear Station, SARA/Title III 2009 Hazardous Chemical Inventory, Correspondence GEXO-2010/00131. February 26, 2010

29. ER Reference - GGNS. 201 lj. Site Procedure 08-S-03-10, Chemistry Sampling Program, Revision 48. January 20, 2011

30. ER Reference - GGNS. 2011 k. Grand Gulf Nuclear Station, Spill Prevention, Control, and Countermeasure Plan. September 1, 2011

31. ER Reference - MDEQ (Mississippi Department of Environmental Quality).

2007.Correspondence to Rusty Shaw, Entergy Operations, Grand Gulf Nuclear Station, from James Crawford, Mississippi Department of Environmental Quality, Groundwater Withdrawal. October 8, 2007

32. ER Reference - MDEQ 2009a, Records of Public-Supply Wells in Mississippi, 2009

33. ER Reference - MDEQ 2010b Wellhead Protection Areas

34. ER Reference - MDEQ 201 la (NPDES Permit Rationale) Rationale for Reissuance

35. ER Reference - MDEQ 2011 b (401 WQC Letter), Mississippi Department of Environmental Quality, Re: Grand Gulf Nuclear Station License Renewal

36. Aquatic Ecology Audit Needs Attachment D: Correspondence to James Thomas, Enercon, from Stephen M. Ricks, Field Supervisor, United States Department of the Interior, Fish and Wildlife Service, Mississippi Field Office, Jackson, MS. February 8, 2010

37. ENSR (ENSR Corporation). 2005. Appendix B, Review of Lower Mississippi Fishes. March 2005

38. ENSR. 2007. Impingement Mortality and Entrainment Characterization Study (IMECS),

Entergy -Waterford 3. December 2007

39. MP&L (Mississippi Power & Light Company). 1981. Mississippi Power & Light Company, Middle South Energy, Inc., "Grand Gulf Nuclear Station Units 1 and 2, Final Environmental Report, "Docket Nos. 50-416 and 50-417. December 18, 1981

40. Federal Migratory Bird Depredation Permit (provided as Attachment A on the Terrestrial Ecology response CD)

41. Black Bear Habitat Assessment (provided as Attachment B on the Terrestrial Ecology response CD)

42. Decision Notice And Finding of No Significant Impact Utility Corridor Maintenance for Wildlife Habitat Enhancement and associated Environmental Assessment (provided in Attachment C on the Terrestrial Ecology response CD)

43. ER Reference-GGNS 2007g (2006 Depredation Report)

44. ER Reference-GGNS 2008e (2007 Depredation Report)

45. ER Reference-GGNS 2009g (2008 Depredation Report)

46. ER Reference-GGNS 2010f (2009 Depredation Report)

47. ER Reference-GGNS 2011 h (2010 Depredation Report)

48. ER Reference-USDA 1976 (Franklin Line Permit)

49. GGNS. 2008g. Grand Gulf Nuclear Station (GGNS), Facility No. 0420-00023, Renewal of Existing Synthetic Minor Operating Permit No. 0420-00023, Correspondence GEXO-2008/0008. November 25, 2008 Attachment(s): (continued)

GNRO-2012/00039 Page 4 of 4

50. Enercon. 2011 b. Evaluation of Potential Air Emissions from Coal and Natural Gas Fired

51. GGNS. 2004. Air Pollution Control Permit to Operate Air Emissions Equipment at a Synthetic Minor Source, Permit No. 0420-00023. June 1, 2004 cc: with Attachment(s)

Mr. John P. Boska, Project Manager Plant Licensing Branch I-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop O-8-C2 Washington, DC 20555 Mr. David Drucker, NRR/DLR U.S. Nuclear Regulatory Commission Mail Stop OWFN/ 11 F1 11555 Rockville Pike Rockville, MD 20852-2378 cc: without Attachment(s)

Mr. Elmo E. Collins, Jr.

Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 1600 East Lamar Boulevard Arlington, TX 76011-4511 U.S. Nuclear Regulatory Commission ATTN: Mr. A. Wang, NRR/DORL Mail Stop OWFN/8 G14 11555 Rockville Pike Rockville, MD 20852-2378 U.S. Nuclear Regulatory Commission ATTN: Mr. Nathaniel Ferrer NRR/DLR Mail Stop OWFN/ 11 F1 11555 Rockville Pike Rockville, MD 20852-2378 NRC Senior Resident Inspector Grand Gulf Nuclear Station Port Gibson, MS 39150 to GNRO-2012/00039 to GNRO-2012/00039 Response to Request for Additional Information (RAI)

Meteorology and Air Quality

1. Provide most recent 5-year onsite hourly meteorological data from 1 0-m and 50-m levels of the primary tower in either text or Excel format (years with more than 90% data recovery rate) with data documentation (e.g., data format, units) and wind roses with stability class distributions.

Enterqy Response Although only five years of meteorological data was requested, six years are being provided based on discussion with Nuclear Regulatory Commission (NRC) staff. Therefore, hourly meteorological data from the 10-meter and 50-meter levels of the primary tower with greater than 90 percent data recovery from 2006 - 2011 is provided in the following Excel files on the enclosed compact disk (CD):

GGNS 2006 Met Data GGNS 2007 Met Data GGNS 2008 Met Data GGNS 2009 Met Data GGNS 2010 Met Data GGNS 2011 Met Data Data units associated with the hourly meteorological data are as follows:

Wind Direction: degrees Wind Speed: miles per hour Delta-T: degrees Fahrenheit Temperature: degrees Fahrenheit Relative Humidity: percent Precipitation: inches Grand Gulf Nuclear Station (GGNS) does not typically develop annual wind rose maps as there is no requirement to do so. Therefore, there is no wind rose map associated with the 2011 meteorological data. However, a 5-year wind rose map (2006 - 2010) was developed in 2011 for site informational purposes and is included in Figure 1.

For consistency with the years of meteorological data being provided (2006 - 2011), stability class distributions for this same period are included in Table 1.

2. Provide the type of ozone depleting substances (ODSs) used on GGNS in HVAC equipment or air conditioners.

Enteray Response The type of freons containing ozone depleting substances that are utilized in refrigeration equipment at the GGNS site is as follows:

Freon 11 (Trichlorofluoromethane)

" Freon 12 (Dichlorodifluoromethane)

Freon 22 (Chlorodifluoromethane)

SUVA 123 (2,2-dichloro-1,1,1-trifluoroethane)

Aquatic Ecology

1. Describe surveys of onsite aquatic resources that Entergy has completed since 1973, other than the mussel surveys completed in 2008.

Enterqy Response Based on review of site documents during the development of the GGNS license renewal Environmental Report (ER), there have been no other surveys completed since 1973 other than the 2008 mussel survey that was conducted in conjunction with the GGNS Unit 3 combined operating license application (COLA).

Hydrology/Water Resources

1. Provide available hydrogeologic cross sections through the site area, along with a cross section location map. The cross sections should illustrate monitoring and on-site potable wells, their screen positions, and stratigraphic information.

Enterqy Response The hydrogeologic cross section figures and associated information can be obtained from the GGNS Updated Final Safety Analysis Report (UFSAR) and the GGNS Unit 3 COLA Final Safety Analysis Report (FSAR). NRC has a copy of the most current GGNS UFSAR which was submitted by Entergy on November 30, 2011 (GNRO-201 1/00100). In addition, the GGNS Unit 3 COLA FSAR can be obtained from ADAMS, Accession Number ML080640402.

GGNS UFSAR Cross Section Fiqures Sections 2.4 and 2.5 of the GGNS UFSAR discuss hydrogeologic conditions that are illustrated by a number of cross section figures referenced in these sections. Figure 2.4-27 shows the location of cross section A-A' for the radial well area along the east bank of the Mississippi River. The stratigraphy along A-A' is shown in the cross section in Figure 2.4-

28. Figure 2.4-27 also shows the location of cross section B-B' that extends from the east bank of the river eastward through the GGNS Unit 1 power block area. Cross section B-B' stratigraphy is shown in Figure 2.4-29.

Figure 2.5-23 identifies the locations of additional cross sections that characterize the upland area of the site. Cross sections are presented in Figures 2.5-24 through 2.5-26.

Figures 2.5-38 and 2.5-40 provide section locations in the GGNS Unit 1 power block area, with the profile section stratigraphy being provided in Figures 2.5-41 through 2.5-56.

While boring locations are identified in the location maps and boring depths are included in the various cross sections presented in the UFSAR, the boring numbers do not necessarily match the currently existing well numbering at GGNS. Cross sections incorporating the construction details (well depths and screened intervals) of existing monitoring wells, potable water wells, and other wells have not been developed for GGNS.

GGNS Unit 3 COLA FSAR Cross Section Figures Hydrogeologic cross sections in an east-west direction through the site area were provided in Figures 2.3-2 and 2.3-3 of GGNS' license renewal ER. These were developed from Figures 2.5.4-224 and 2.5.4-225, respectively, that are included in the GGNS Unit 3 COLA FSAR.

The location of cross section H-H' and I-I' are provided in Figure 2.5.4-216. Figures 2.3-2 and 2.3-3 of the ER illustrate the stratigraphy developed from boring lithologic descriptions along the cross sections H-H' (through the river floodplain east of the Mississippi River to the bluff area) and I-I' (upland area from the bluff through the abandoned Unit 2 power block).

Figure 2.5.4-216 also shows the location of cross sections J-J' and K-K'. Cross section stratigraphy along J-J' is illustrated in Figure 2.5.4-226; and cross section stratigraphy along K-K' is illustrated in Figure 2.5.4-227.

As discussed in the GGNS Unit 3 COLA FSAR, the monitoring wells installed during the site characterization for Unit 3 were installed adjacent to the boreholes with the same numerical designation. Cross section H-H' includes the location of B-1 043 (where monitoring wells MW-1 043A and MW-1 043B are located) and B-1 045 (MW-1045B). Monitoring wells MW-1023A and MW-1023B are located adjacent to B-1023 which is included in the cross section I-I'. Additional monitoring wells installed during the site characterization for Unit 3 are referenced by their adjacent characterization borings indicated in the other cross sections identified in Figure 2.5.4-215. The cross sections in Figure 2.5.4-215 are in the upland area west of GGNS Unit 1 around the proposed Unit 3 power block. COLA monitoring wells and construction details such as screened intervals are included in the Excel spreadsheet provided in response to Hydrology/Water Resources Request for Additional Information #3 below.

2. Provide a table or spreadsheet of all tritium data for all groundwater monitoring wells (regardless of original purpose or program) and on-site potable wells collected since 2009.

Include sampling dates, tritium activity concentrations, detection limits.

Enteray Response Table 2 presents results of GGNS' groundwater monitoring program associated with the voluntary industry groundwater protection initiative (Nuclear Energy Institute 07-07) from 2009 through February 2012. Only tritium results from wells that were actually sampled are shown from year to year in Table 2. Table 3 presents groundwater sampling results associated with the GGNS radiological environmental monitoring program that is conducted in accordance with Table 6.12.1-1 of the GGNS Offsite Dose Calculation Manual from 2009 through April 2012.

3. Provide a table or spreadsheet of all groundwater monitoring wells (regardless of original purpose or program) and on-site potable wells documenting, their coordinates, the depths and elevations of the well screens, and the hydrogeologic units they monitor, as well as a map showing each well location, if available.

Enterqy Response A spreadsheet identifying the Mississippi State Plane Northing and Easting coordinates, depths and elevations of the well screens, and the hydrogeologic units in which the wells are screened for onsite groundwater wells in the upland area is provided as an Excel file labeled "GGNS Well Summary Table" on the enclosed CD.

Wells installed at GGNS over various time periods have been screened in the upper three hydrogeologic units in which groundwater occurrence has been identified. These units include the Loess, the Upland Complex (terrace deposits), and the upper portion of the Catahoula Formation. For wells installed in the Upland Complex as shown in the Excel spreadsheet, Figure 2 provides the location of these wells. Figure 2 also provides a potentiometric surface of the water table aquifer in the Upland Complex developed from measurement of water levels in select wells on July 11, 2011. For wells that were installed in the Loess ("A" series wells) and Catahoula ("C" series wells) as shown in the Excel spreadsheet, Figure 3 provides the location of these wells. Potentiometric surface mapping has not been completed for groundwater in the Loess and Catahoula Formations due to the limited occurrence of groundwater in the "A" series of wells, and limited monitoring points and water level measurements in the "C" series of wells.

4. Provide a map of outfall locations.

Enterqy Response Permitted outfalls identified in GGNS National Pollutant Discharge Elimination System (NPDES) Permit MS00029521 are provided in Figure 4.

Table 1 Stability Class Distributions 2006 Grand Gulf Meteorological Data Stability Class Delta-T Range Occurrences (F)

(Hours)

Extremely Unstable A

<-1.36 151 1.7 Moderately Unstable B

-1.36<DT<-1.21 235 2.7 Slightly Unstable C

-1.21 <DT<-1.07 495 5.6 Neutral D

-1.07<DT<-0.35 2687 30.7 Slightly Stable E

-0.35<DT<1.09 2741 31.3 Moderately Stable F

1.09<DT<2.89 1036 11.8 Extremely Stable G

>2.88 1162 13.3 Missing M

NA 253 2.9 2007 Grand Gulf Meteorological Data Stability Class Delta-T Range Occurrences (F)

(Hours)

Extremely Unstable A

<-1.36 122 1.4 Moderately Unstable B

-1.36<DT<-1.21 192 2.2 Slightly Unstable C

-1.21 <DT<-1.07 433 4.9 Neutral D

-1.07<DT<-0.35 2812 32.1 Slightly Stable E

-0.35<DT<1.09 2820 32.2 Moderately Stable F

1.09<DT<2.89 1050 12.0 Extremely Stable G

>2.88 1251 14.3 Missing M

NA 80 0.9 2008 Grand Gulf Meteorological Data Stability Class Delta-T Range Occurrences (F)

(Hours)

Extremely Unstable A

<-1.36 629 7.2 Moderately Unstable B

-1.36<DT<-1.21 503 5.8 Slightly Unstable C

-1.21 <DT<-1.07 569 6.5 Neutral D

-1.07<DT<-0.35 2825 32.3 Slightly Stable E

-0.35<DT<1.09 2340 26.8 Moderately Stable F

1.09<DT<2.89 769 8.8 Extremely Stable G

>2.88 1101 12.6 Missing M

NA 48

<0.1

Table 1 Stability Class Distributions 2009 Grand Gulf Meteorological Data Stability Class Delta-T Range Occurrences (F)

(Hours)

Extremely Unstable A

<-1.37 1223 14.3 Moderately Unstable B

-1.37<DT_<-1.23 592 6.9 Slightly Unstable C

-1.23<DT<-1.09 597 7.0 Neutral D

-1.09<DT<-0.37 2481 29.1 Slightly Stable E

-0.37<DT<1.08 1983 23.2 Moderately Stable F

1.08<DT-<2.88 716 8.4 Extremely Stable G

>2.88 942 11.1 Missing M

NA 224 2.6 2010 Grand Gulf Meteorological Data Stability Class Delta-T Range Occurrences (F)

(Hours)

Extremely Unstable A

<-1.37 1969 22.5 Moderately Unstable B

-1.37<DT<-1.23 450 5.1 Slightly Unstable C

-1.23<DT<-1.09 569 6.5 Neutral D

-1.09<DT<-0.37 2097 24.1 Slightly Stable E

-0.37<DT<1.08 1500 17.2 Moderately Stable F

1.08<DT<2.88 776 8.9 Extremely Stable G

>2.88 1373 15.7 Missing M

NA 26 0.3 2011 Grand Gulf Meteorological Data Stability Class Delta-T Range Occurrences (F)

(Hours)

Extremely Unstable A

<-1.37 1358 15.5 Moderately Unstable B

-1.37<DT<-1.23 590 6.7 Slightly Unstable C

-1.23<DT<-1.09 515 5.9 Neutral D

-1.09<DT<-0.37 2360 26.9 Slightly Stable E

-0.37<DT<1.08 2194 25.0 Moderately Stable F

1.08<DT<2.88 744 8.5 Extremely Stable G

>2.88 980 11.2 Missing M

NA 19 0.2

Table 2 Industry Groundwater Protection Initiative Monitoring Results 2009 GGNS Groundwater Tritium Monitoring Results (pCVI)

Well 01-09 05-09 08-09 12-09 MW-1020B

<587

<569

<580

<566 MW-1 026B

<586

<569

<580

<564 MW-1 027B

<588

<573

<587

<556 MW-1134B

<590

<571

<585

<562

Table 2 Industry Groundwater Protection Initiative Monitoring Results 2010 GGNS Groundwater Tritium Monitoring Results (pCi/I)

Well 02-10 03-10 05-10 06-10 08-10 09-10 10-10 11-10 12-10 DW-01

,7 P

10,533 3,990 4,722 DW-03 719

<472 520 545 DW-04

<492 753 895 DW-05

<515

<414 DW-07 2,106 2,992 2,863 3,273 DW-08

<426

<373 MW-01 973 686

<414 MW-06 741 713 666 MW-07 1,639 1,731 2,571 2,760 6,900 2,027 10,687 MW-09

<527

<498

<511

<397 MW-14

<524

<498

<402 98 MW-23

<527

<500

<511

<414 MW-26

<500

<534

<400 MW-IO2B

<413 MW-1 020B

<581 MW-1 026B

<583

<491

<544

<400 MW-1027B

<573

<490

<513

<412 MW-1134B

<581

<525

<476

<506

<400 MW-1043B 294

<487

<515

<414 MW-1045B

<493

<513

<399 OW-202

<506 OW-209B 3,698 4,230 3,257 6,242 6,202 6,813 7,344

Table 2 Industry Groundwater Protection Initiative Monitoring Results 2011 GGNS Groundwater Tritium Monitoring Results (pCVI)

Well 01-11 03-11 04-11 05-11 06-11 07-11 08-11 09-11 11-11 12-11 DW-01 8,497 11,600 10,423 10,923 12,565 17,108 19,519 21,100 14,300 DW-03 659 888

<421 738 636 DW-04 1,287 1,109 775 776 873 1,207 822 DW-05

<407

<643

<426

<425

<659

<319 DW-07 3,603 3,164 2,844 2,495 2,299 2,110 2,939 4,430 DW-08

<374

<455 MW-01

<372

<410

<445

<423 814

<389 MW-02 522 MW-07 7,135 10,000 17,404 MW-09

<393 653

<661

<660

<318 MW-10

<404 MW-14

<385

<622

<605

<674

<309 MW-18

<405 MW-23

<377 540

<423

<649

<388 MW-26

<412

<638

<604

<662

<321 MW-1OOB

<423

<382

<650

<622

<661

<318 MW-102B

<424

<441

<648

<645

<661 378 MW-103B

<426 639

<312 MW-104B......................

<429

<660

<384

Table 2 Industry Groundwater Protection Initiative Monitoring Results 2011 GGNS Groundwater Tritium Monitoring Results (pCi/I)

Well 01-11 03-11 04-11 05-11 06-11 07-11 08-11 09-11 11-11 12-11 MW-105B

<646 773 873 765 1,040 716 MW-106B

<474

<438

<647

<649

<662

<308 MW-107B 1,935 2,114 2,341 2,088 2,355 2,293 1,913 2,200 MW-I08B 1,012 931 944 MW-I09B 759 880 985 725 1,266 674 MW-110B

<421

<626

<647

<661

<316 MW-111B 5,459 5,010 3,921 4,457 6,260 5,780 MW-12B

<403

<408

<630

<272

<318 MW-113B

<429

<409

<660

<304 MW-114B 437 808 735 965 929 1,630 MW-1 15B 1,250 927 MW-118B

<363

<316 MW-1007C

<652 MW-1009C

<624 MW-1012C

<626 MW-1020C

<626 MW-1024C

<667 MW-1026B

<445

<648

<621

<663

<315 MW-1027B

<440

<648

<602

<650

<374

Table 2 Industry Groundwater Protection Initiative Monitoring Results 2011 GGNS Groundwater Tritium Monitoring Results (pCi/I)

Well 01-11 03-11 04-11 05-11 06-11 07-11 08-11 09-11 11-11 12-11 MW-1027C

<626....

MW-1042C

<649 MW-1043B

<409

<647

<604

<638

<391 MW-1045B

<382

<624

<604

<639

<314 MW-1082C

<625 MW-1134B

<488

<645

<605

<662

<313 MW-1134C

<625 OW-209B 7,774 8,040 7,062 7,298 6,732 6,757 6,308 6,320 5,930 SW-103B

<357

Table 2 Industry Groundwater Protection Initiative Monitoring Results 2012 GGNS Groundwater Tritium Monitoring Results (pCi/I)

Well 01-12 02-12 DW-01 17,800 MW-01

,I

<239 MW-08

<326 MW-09

<234 MW-23 313 MW-100B

<234 MW-102B

<238 MW-1 03B

<235 MW-104B

<235 MW-1 05B 740 MW-106B

<235 MW-107B 3,430 MW-108B 612 MW-1 09B 699 MW-1 lOB

<229 MW-111B 10,100 MW-1 12B

<229 MW-113B 356 MW-114B 2,340 MW-115B 5,630 MW-1 18B 491 OW-209B 5,980 SW-103B

<366

Table 3 Radiological Environmental Monitoring Program Results a 2009 - April 2012 Groundwater Tritium Monitoring Results (pCi/I)

Well 12-09 03-10 06-10 09-10 11-10 03-11 04-11 07-11 09-11 12-11 03-12 04-12 CONSTWELL

<630

<692 CONSTWELL1

<582

<480 738

<373

<388

<423

<637

<707 CONSTWELL3

<581

<479

<407

<371

<389

<423

<637

<709 CONSTWELL4

<579

<477

<408

<368

<392

<708 PGWELL

<633

<445

<348

<388

<420

<642

<692

<636

a.

CONSTWELL (indicator location) represents GGNS onsite potable water wells; PGWELL (control location) represents the Town of Port Gibson wells.

Figure 1 GGNS 5-year Wind Rose 2006-2010 (10 Meter)

N m

S Annual 43,420 HRS Wind Direction Frequency (Percent)

Mean Wind Speed (MPH)

GGNS 5-year Wind Rose 2006-2010 (10 Meter)

Figure 2 Wells Installed in Upland Complex Formation

Figure 3 Wells Installed in Loess and Catahoula Formations

Figure 4 GGNS NPDES Permit MS00029521 Outfalls