ML063070037

Edwin I Hatch, Nuclear Plant Unit No. 1 & 2, Request for Additional Information for Alternate Source Term Review (TAC Nos. MD2934 & MD2935)

ML063070037
Person / Time
Site:	Hatch
Issue date:	11/14/2006
From:	Martin R NRC/NRR/ADRO/DORL/LPLII-1
To:	Stinson L Southern Nuclear Operating Co
Martin E. Robert/NRR/DLPM/415-1493
References
TAC MD2934, TAC MD2935
Download: ML063070037 (4)

Text

November 14, 2006 Mr. L. M. Stinson Vice President - Nuclear Hatch Project Southern Nuclear Operating Company, Inc.

Post Office Box 1295 Birmingham, AL 35201-1295

SUBJECT:

EDWIN I. HATCH NUCLEAR PLANT, UNIT NOS. 1 AND 2, REQUEST FOR ADDITIONAL INFORMATION FOR ALTERNATE SOURCE TERM REVIEW (TAC NOS. MD2934 AND MD2935)

Dear Mr. Stinson:

By letter dated August 29, 2006, the Southern Nuclear Operating Company, Inc., submitted a license amendment request that is based, in part, on an alternative source term for the Edwin I.

hatch Nuclear plant. The Nuclear Regulatory Commission staff has performed a preliminary review of the portion of the application dealing with post-loss-of-coolant accident pH control of the supression pool water and find that additional information is needed as stated in the Enclosure.

Please contact me if you have any questions regarding this correspondence.

Sincerely,

/RA/

Robert E. Martin, Senior Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-321 and 50-366 cc w/encl: See next page

November 14, 2006 Mr. L. M. Stinson Vice President - Nuclear Hatch Project Southern Nuclear Operating Company, Inc.

Post Office Box 1295 Birmingham, AL 35201-1295

SUBJECT:

EDWIN I. HATCH NUCLEAR PLANT, UNIT NOS. 1 AND 2, REQUEST FOR ADDITIONAL INFORMATION FOR ALTERNATE SOURCE TERM REVIEW (TAC NOS. MD2934 AND MD2935)

Dear Mr. Stinson:

By letter dated August 29, 2006, the Southern Nuclear Operating Company, Inc., submitted a license amendment request that is based, in part, on an alternative source term for the Edwin I.

hatch Nuclear plant. The Nuclear Regulatory Commission staff has performed a preliminary review of the portion of the application dealing with post-loss-of-coolant accident pH control of the supression pool water and find that additional information is needed as stated in the Enclosure.

Please contact me if you have any questions regarding this correspondence.

Sincerely,

/RA/

Robert E. Martin, Senior Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-321 and 50-366 cc w/encl: See next page Distribution:

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Accession No.: ML063070037 OFFICE NRR/LPL2-1/PM NRR/LPL2-1/LA NRR/LPL2-1/BC NAME RMartin /ma MOBrien EMarinos DATE 11/141/06 11/13/06 11/14 /06 OFFICIAL RECORD COPY

REQUEST FOR ADDITIONAL INFORMATION EDWIN I. HATCH NUCLEAR PLANT, UNIT NOS. 1 AND 2 TAC NOS. MD2934 AND MD2935

1. In the submittal from Southern Nuclear Operating Company, Inc. (SNC), dated August 29, 2006, it is stated that the calculation methodology for suppression pool pH control is based on the approach outlined in NUREG-1465, Accident Source Terms for Light-Water Nuclear Power Plants, and NUREG/CR-5950, Iodine Evolution and pH Control.

Because pH values lower than 7 cause formation of elemental iodine (I2) in irradiated water pools, pH has to be maintained above that value. Describe how the procedures, described in NUREG/CR-5950, are applied for controlling the pH of the suppression pool water.

2. Describe your methodology for calculating strong acids (hydrochloric and nitric) generated in the post-LOCA radiation field existing in the containment.

3. Describe how the methodology in NUREG/CR-5950 is applied for determining buffering action of sodium pentaborate.

4. It is stated in Section 2.2.2 of the August 29, 2006, submittal that the pH of the suppression pool water is calculated using the STARpH code. Please provide the input and output data to the STARpH code, which will allow us to verify that the pH is at or above 7 for the 30-day post-accident period.

Enclosure

Edwin I. Hatch Nuclear Plant, Unit Nos. 1 & 2 cc:

Laurence Bergen Mr. Jeffrey T. Gasser Oglethorpe Power Corporation Executive Vice President 2100 E. Exchange Place Southern Nuclear Operating Company, Inc.

P.O. Box 1349 P.O. Box 1295 Tucker, GA 30085-1349 Birmingham, AL 35201-1295 Mr. R. D. Baker Mr. Dennis R. Madison, General Manager Manager - Licensing Edwin I. Hatch Nuclear Plant Southern Nuclear Operating Company, Inc. Southern Nuclear Operating Company, Inc.

P.O. Box 1295 U.S. Highway 1 North Birmingham, AL 35201-1295 P.O. Box 2010 Baxley, GA 31515 Resident Inspector Plant Hatch Mr. K. Rosanski 11030 Hatch Parkway N. Resident Manager Baxley, GA 31531 Oglethorpe Power Corporation Edwin I. Hatch Nuclear Plant Harold Reheis, Director P.O. Box 2010 Department of Natural Resources Baxley, GA 31515 205 Butler Street, SE., Suite 1252 Atlanta, GA 30334 Mr. L. M. Stinson Vice President - Nuclear Hatch Project Steven M. Jackson Southern Nuclear Operating Company, Inc.

Senior Engineer - Power Supply P.O. Box 1295 Municipal Electric Authority of Georgia Birmingham, AL 35201-1295 1470 Riveredge Parkway, NW Atlanta, GA 30328-4684 Mr. Reece McAlister Executive Secretary Georgia Public Service Commission 244 Washington St., SW Atlanta, GA 30334 Arthur H. Domby, Esq.

Troutman Sanders Nations Bank Plaza 600 Peachtree St, NE, Suite 5200 Atlanta, GA 30308-2216 Chairman Appling County Commissioners County Courthouse Baxley, GA 31513