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| | number = ML072680697 | | | number = ML072680697 |
| | issue date = 10/03/2007 | | | issue date = 10/03/2007 |
| | title = Edwin I. Hatch Nuclear Plant, Unit Nos 1 and 2, Request for Additional Information Regarding Alternate Source Term Application | | | title = Request for Additional Information Regarding Alternate Source Term Application |
| | author name = Martin R E | | | author name = Martin R E |
| | author affiliation = NRC/NRR/ADRO/DORL/LPLII-1 | | | author affiliation = NRC/NRR/ADRO/DORL/LPLII-1 |
Revision as of 08:25, 10 February 2019
Letter Sequence RAI |
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MONTHYEARML0630700372006-11-14014 November 2006 Edwin I Hatch, Nuclear Plant Unit No. 1 & 2, Request for Additional Information for Alternate Source Term Review (TAC Nos. MD2934 & MD2935) Project stage: RAI ML0632800652006-11-14014 November 2006 Meeting Summary Handouts, Enclosure 2 (Tac Nos. MD2934 and MD2935) Project stage: Meeting ML0632401972006-12-11011 December 2006 Summary of November 14, 2006, Meeting with Southern Nuclear Operating Co., on Alternative Source Term Submittal Project stage: Meeting ML0704602852007-02-22022 February 2007 Request for Additional Information Regarding Alternate Source Term Application Project stage: RAI ML0706502982007-03-15015 March 2007 Edwin I Hatch Nuclear Plant, Units 1 and 2 (HNP) - Request for Additional Information Alternative Source Term Application Project stage: RAI ML0708902972007-04-10010 April 2007 RAI Regarding Alternative Source Term Application Project stage: RAI ML0710900392007-04-26026 April 2007 Request for Additional Information Alternate Source Term Application Project stage: RAI ML0710900572007-05-0808 May 2007 Request for Additional Information Alternate Source Term Application Project stage: RAI ML0712801262007-05-30030 May 2007 Request for Additional Information the Revision of the Licensing and Design Basis with a Full Scope Implementation of an Alternative Source Term Project stage: RAI ML0721904682007-08-16016 August 2007 Nos. Units 1 and 2, (Hnp), RAI, Request for Additional Information Regarding Alternate Source Term Application Project stage: RAI ML0726806972007-10-0303 October 2007 Request for Additional Information Regarding Alternate Source Term Application Project stage: RAI NL-07-1949, Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Turbine Building Ventilation and Leakage Treatment Piping Seismic Evaluations2007-12-11011 December 2007 Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Turbine Building Ventilation and Leakage Treatment Piping Seismic Evaluations Project stage: Response to RAI ML0800702622008-01-0909 January 2008 (Hnp), Request for Additional Information (RAI) Regarding Alternate Source Term Application Tac Nos. MD2934 and MD2935) Project stage: RAI ML0801100512008-01-30030 January 2008 Discussion of Review Schedule Regarding Alternate Source Term Application Project stage: Other NL-08-0035, Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Unit 1 Main Steam Isolation Valve Alternate Leakage Treatment Seismic Evaluation2008-02-0404 February 2008 Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Unit 1 Main Steam Isolation Valve Alternate Leakage Treatment Seismic Evaluation Project stage: Response to RAI ML0803801412008-02-13013 February 2008 E.I Hatch Nuclear Plant, Units 1 and 2 (Hnp), RAI Regarding Alternate Source Term Application Project stage: RAI NL-07-1389, Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Radiological Consequences Analyses2008-02-25025 February 2008 Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Radiological Consequences Analyses Project stage: Response to RAI NL-07-1532, Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Turbine Building Ventilation and Standby Liquid Control Systems2008-02-27027 February 2008 Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Turbine Building Ventilation and Standby Liquid Control Systems Project stage: Response to RAI NL-08-0351, Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Power Sources for the Turbine Building Ventilation System2008-03-13013 March 2008 Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Power Sources for the Turbine Building Ventilation System Project stage: Response to RAI NL-08-0524, Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding Atmospheric Dispersion Factors2008-04-0101 April 2008 Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding Atmospheric Dispersion Factors Project stage: Response to RAI NL-08-0634, Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Radiological Consequences Analyses2008-05-0505 May 2008 Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Radiological Consequences Analyses Project stage: Response to RAI ML0814201722008-05-30030 May 2008 Request for Additional Information Regarding Alternative Source Term Application Project stage: RAI NL-08-0903, Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Turbine Building Ventilation Exhaust System Fans2008-06-25025 June 2008 Request to Implement an Alternative Source Term Response to Request for Additional Information Regarding the Turbine Building Ventilation Exhaust System Fans Project stage: Response to RAI NL-08-1022, Request to Revise the Unit 1 and Unit 2 Operating Licenses to Extend the Interim Period for the Use of Potassium Iodide2008-07-0202 July 2008 Request to Revise the Unit 1 and Unit 2 Operating Licenses to Extend the Interim Period for the Use of Potassium Iodide Project stage: Request ML0819001752008-07-0909 July 2008 Request for Additional Information, Alternate Source Term Application Project stage: RAI ML0819003312008-07-14014 July 2008 Transmittal of Notice of Consideration of Issuance of Amendments for Alternate Source Term Application Project stage: Other ML0819003382008-07-14014 July 2008 Notice of Consideration of Issuance of Amendments for Alternate Source Term Application Project stage: Other ML0819703922008-07-14014 July 2008 Edwin I. Hatch, Transmittal of Responses to Request for Additional Information Addition of License Conditions to Operating Licenses for Request to Implement an Alternative Source Term Project stage: Request NL-08-1269, Request to Implement an Alternative Source Term Response to Requests for Additional Information Regarding Turbine Building Ventilation Exhaust Systems and Operating License Changes2008-08-14014 August 2008 Request to Implement an Alternative Source Term Response to Requests for Additional Information Regarding Turbine Building Ventilation Exhaust Systems and Operating License Changes Project stage: Response to RAI ML0817700752008-08-28028 August 2008 Issuance of Amendment Nos. 256 and 200, Alternate Source Term Project stage: Approval 2008-02-13
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[Table view] |
Text
October 3, 2007
Mr. Dennis R. Madison Vice President - Hatch Edwin I. Hatch Nuclear Plant 11028 Hatch Parkway North Baxley, GA 31513
SUBJECT:
EDWIN I. HATCH NUCLEAR PLANT, UNIT NOS. 1 AND 2 (HNP), REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING ALTERNATE SOURCE TERM APPLICATION (TAC NOS. MD2934 AND MD2935)
Dear Mr. Madison:
By letter to the Nuclear Regulatory Commission dated August 29, 2006, Southern Nuclear Operating Company, Inc., proposed to revise the HNP licensing and design basis with a full scope implementation of an alternative source term. We have reviewed your application and have identified a need for additional information on certain seismic analyses as set forth in the Enclosure.
We discussed this issue with your staff on September 21, 2007. Your staff indicated that it plans to submit a response to this issue within sixty (60) days of receipt of this letter.
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
Enclosure:
RAI cc w/encl: See next page
- ML072680697 OFFICE NRR/LPL2-1/PM NRR/LPL2-1/LA NRR/EMCB/BC NRR/LPL2-1/BC NAME RMartin:nc MO'Brien KManoly EMarinos DATE 09/28/07 10/1/07 10/2/07 10/3/07 REQUEST FOR ADDITIONAL INFORMATION CONCERNING IMPLEMENTATION OF AN ALTERNATIVE SOURCE TERM APPLICATION FOR EDWIN I. HATCH NUCLEAR PLANT, UNIT NOS. 1 AND 2 (HNP)
- 1) It is stated on Page 19 of Enclosure 8 of the Southern Nuclear Operating Company (SNC) August 29, 2006, application that for 1/2 SME (Seismic Margin Earthquake) and operating loads, all four sets of cast-in-place anchor bolts at the condenser piers have capacities, based on Generic Implementation Procedure, Revision 2 (GIP-2) and the GIP supporting document on seismic verification of equipment anchorage, that are greater than their demand for all load combinations. Furthermore, based on the SNC letter dated July 16, 2007, Question 4, part 2, the maximum shear force is 281,000 pounds for the southeast pier. The resulting shear stress per bolt due to this force is slightly larger than the GIP-2 shear stress allowable considered in table C.3-1 for cast-in-place bolts. The Nuclear Regulatory Commission (NRC) staff requests the licensee to justify the exceedance. 2) It is stated on Page 13 of Enclosure 8 of the August 29, 2006, application, that the condenser sole plate has 1.5-inch thick by 50-inch long shear plates. The plan dimensions of the condenser piers are given as 58 inches x 38 inches in SNC's letter dated July 16, 2007, Question 4, part 3. There is an apparent inconsistency in this information with respect to whether there can be a 50-inch long shear lug on the narrow side. The NRC staff requests SNC to provide the configuration and dimensions of the shear lugs in the short direction and to revise Enclosure 8 appropriately. 3) Enclosure 8 does not include information relative to the evaluation and acceptability of the condenser sole plate shear lugs. The NRC staff requests SNC to demonstrate shear lug adequacy (e.g., weld stress, bending and shear stress in the shear lugs) and transfer of load from shear lug to the concrete pier (adequate bearing and shear strength of concrete). 4) With the presence of shear lugs on the underside of the condenser sole plate and considering the slotted hole details shown in Figure 6b of Enclosure 8, it appears that the anchor bolts may not be loaded in shear until yielding of the shear lugs occurs. The NRC staff requests the licensee to provide further information (assumed condenser base shear load path, etc.) relative to the rationale used to calculate the resulting shear force/stress in the anchor bolts as noted in Enclosure 8 and in the SNC letter dated July 16, 2007, Question 4, part 1. 5) There appears to be an inconsistency in the table provided in SNC's letter dated July 16, 2007, in response to Question 4, part 2. The axial force for the northeast pier, -172,000 pounds for the D + L - (1.25 x 1/2 SME) load combination is not consistent with -84,000 pounds for the D + L - 1/2 SME load combination. The NRC staff requests SNC to review the values in the referenced table and to revise the table accordingly. 6) Section 5.7 of the NRC safety evaluation report (dated March 3, 1999) for GE Topical Report NEDC-31858P, Revision 2, states. "The staff has determined that the generic methodology presented, coupled with the plant-specific analytical evaluations for the condenser structural members and their associated anchorages, would provide an acceptable method to verify the seismic adequacy of the condenser design." The NRC staff requests SNC to clarify the evaluation performed Enclosure for the condenser shell/structural members and to provide justification for their adequacy. 7) The NRC staff requests SNC to identify the edition of the design codes ( the American Concrete Institute (ACI), American Institute of Steel Construction (AISC),
etc.) used in the evaluation of Unit 1 turbine building and condenser for the main steam isolation valve alternate leakage treatment path (e.g., on page 19 of Enclosure 8, there is no edition of the ACI 318 code noted for condenser pier evaluation). 8) Normally, the turbine pedestal is a separate structure independent of the turbine building. Enclosure 8 does not specifically address the turbine pedestal adequacy.
The NRC staff requests SNC to address the turbine pedestal potential Seismic Category II/I concern. 9) Enclosure 9 references GIP Revision 3A while Enclosure 8 references GIP Revision 2. The NRC staff requests SNC to review the respective references for consistency and to revise the pertinent sections accordingly.
Edwin I. Hatch Nuclear Plant, Units 1 & 2 cc: Laurence Bergen Oglethorpe Power Corporation 2100 E. Exchange Place P.O. Box 1349 Tucker, GA 30085-1349 Mr. R. D. Baker Manager - Licensing Southern Nuclear Operating Company, Inc. P.O. Box 1295 Birmingham, AL 35201-1295 Resident Inspector Plant Hatch 11030 Hatch Parkway N. Baxley, GA 31531 Harold Reheis, Director Department of Natural Resources 205 Butler Street, SE., Suite 1252 Atlanta, GA 30334 Steven M. Jackson Senior Engineer - Power Supply Municipal Electric Authority of Georgia 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
Mr. Jeffrey T. Gasser Executive Vice President Southern Nuclear Operating Company, Inc. P.O. Box 1295 Birmingham, AL 35201-1295
General Manager Edwin I. Hatch Nuclear Plant Southern Nuclear Operating Company, Inc. U.S. Highway 1 North P.O. Box 2010 Baxley, GA 31515
Mr. K. Rosanski Resident Manager Oglethorpe Power Corporation Edwin I. Hatch Nuclear Plant P.O. Box 2010 Baxley, GA 31515