ML040720407
| ML040720407 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 03/24/2004 |
| From: | Olshan L NRC/NRR/DLPM/LPD2 |
| To: | Jamil D Duke Energy Corp |
| Olshan L N, NRR/DLPM, 415-1419 | |
| References | |
| TAC MB7842, TAC MB7843 | |
| Download: ML040720407 (6) | |
Text
March 24, 2004 Mr. D. M. Jamil Vice President Catawba Nuclear Station Duke Energy Corporation 4800 Concord Road York, South Carolina 29745
SUBJECT:
CATAWBA NUCLEAR STATION, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION CONCERNING STEAM GENERATOR TUBE INTEGRITY CRITERIA (TAC NOS. MB7842 AND MB7843)
Dear Mr. Jamil:
Enclosed is a request for additional information (RAI) concerning the structural integrity performance criteria for Catawba Nuclear Station, Units 1 and 2. This RAI was discussed with Mr. Larry Rudy of your staff, and he has indicated that your response should be provided within 30 days of the date of this letter. Note that item 2 of the RAI has changed from the draft version that was sent to you by telefax on March 5, 2004. Please contact me at 301 415-1419 if you have any further questions on this matter.
Sincerely,
/RA/
Leonard N. Olshan, Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-413 and 50-414
Enclosure:
As stated
ML040720407 NRR-088 OFFICE PDII-1/PM PDII-1/LA PDII-1/SC NAME LOlshan CHawes JNakoski DATE 3/22/04 3/22/04 3/24/04
Enclosure REQUEST FOR ADDITIONAL INFORMATION ON RELIEF REQUEST CONCERNING STEAM GENERATOR TUBE INTEGRITY CRITERIA CATAWBA NUCLEAR STATION, UNITS 1 AND 2 TAC NOS. MB7842 AND MB7843
Background:
By letter dated February 25, 2003, as revised by letters dated June 9, and July 30, 2003, Duke Energy Corporation (the licensee) submitted a Technical Specification amendment request for Catawba Nuclear Station, Units 1 and 2, concerning the maintaining of steam generator tube integrity. The July 30, 2003, letter included a revised proposal for the structural integrity performance criteria (SIPC) that was intended to address the influence of non-pressure related loads on tube burst during design basis accidents as follows:
All inservice steam generator tubes shall retain structural integrity over the full range of normal operating conditions (including startup, operation in the power range, hot standby, cooldown, and all anticipated transients included in the design specification) and design basis accidents. This includes maintaining a safety factor of 3.0 against burst under normal steady state full power operation primary-to-secondary pressure differential and a safety factor of 1.4 against burst applied to design basis accident primary to secondary pressure differentials. Apart from the above requirements, additional loading conditions associated with the design basis accidents, or combination of accidents in accordance with the design and licensing basis, shall also be evaluated to determine if the associated loads contribute significantly to burst. In the assessment of tube integrity, those loads that do significantly affect burst shall be determined and assessed in combination with the loads due to primary to secondary pressure differential using safety factors that are consistent with the licensing basis design criteria.
By letter dated September 17, 2003, which was revised by letter dated October 10, 2003, the NRC staff issued a Request for Additional Information (RAI) concerning how the portion of the SIPC relating to non-pressure related loads would actually be implemented.
During a meeting with the NRC staff on January 21, 2004, the Nuclear Energy Institute (NEI) described an industry program that was underway to develop information needed to respond to the RAI which would include new industry guidelines for assessing the influence of non-pressure related loads on burst pressure during design basis accidents. NEI expects to provide this information and to resubmit the necessary versions of the Generic License Change Package by October 2004. The licensee for Catawba expects to submit a revised amendment request at that time.
In the meantime, the NRC staff believes there may be an adequate technical basis to proceed with review and approval of the current Catawba amendment package on an interim basis pending completion of the aforementioned NEI effort. This interim approach would be predicated on the licensee submitting of each of the following:
Requested Information:
1.
Provide an assessment demonstrating that stress corrosion cracking, particularly circumferential cracking, is not expected to occur over the current and next inspection cycle. Absent any significant potential for cracking during this time period, explain why any non-pressure related loads would not be expected to influence burst pressures during design basis accidents.
2.
Propose a license condition that commits to submit any necessary revisions to the interim technical specifications within two months following completion of the NEI program described during the January 21, 2004, meeting. Should the NEI program not be completed by December 31, 2004, the licensee shall submit an update to the assessment in item 1 in accordance with the reporting requirement in the proposed technical specifcation for each inspection performed in December 2004 or thereafter until the NEI program has been completed. In addition, if cracking is identified during future inspections, the licensee shall promptly notify the NRC staff.
Catawba Nuclear Station cc:
Lee Keller, Manager Regulatory Compliance Duke Energy Corporation 4800 Concord Road York, South Carolina 29745 Ms. Lisa F. Vaughn Duke Energy Corporation Mail Code - PB05E 422 South Church Street P.O. Box 1244 Charlotte, North Carolina 28201-1244 Anne Cottingham, Esquire Winston and Strawn 1400 L Street, NW Washington, DC 20005 North Carolina Municipal Power Agency Number 1 1427 Meadowwood Boulevard P. O. Box 29513 Raleigh, North Carolina 27626 County Manager of York County York County Courthouse York, South Carolina 29745 Piedmont Municipal Power Agency 121 Village Drive Greer, South Carolina 29651 Ms. Karen E. Long Assistant Attorney General North Carolina Department of Justice P. O. Box 629 Raleigh, North Carolina 27602 NCEM REP Program Manager 4713 Mail Service Center Raleigh, North Carolina 27699-4713 North Carolina Electric Membership Corp.
P. O. Box 27306 Raleigh, North Carolina 27611 Senior Resident Inspector U. S. Nuclear Regulatory Commission 4830 Concord Road York, South Carolina 29745 Henry Porter, Assistant Director Division of Waste Management Bureau of Land and Waste Management Dept. of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201-1708 Mr. R. L. Gill, Jr., Manager Nuclear Regulatory Issues and Industry Affairs Duke Energy Corporation 526 South Church Street Mail Stop EC05P Charlotte, North Carolina 28202 Saluda River Electric P. O. Box 929 Laurens, South Carolina 29360 Mr. Peter R. Harden, IV, Vice President Customer Relations and Sales Westinghouse Electric Company 6000 Fairview Road 12th Floor Charlotte, North Carolina 28210 Mary Olson Director of the Southeast Office Nuclear Information and Resource Service 729 Haywood Road, 1-A P. O. Box 7586 Asheville, North Carolina 28802
Catawba Nuclear Station cc:
Mr. T. Richard Puryear Owners Group (NCEMC)
Duke Energy Corporation 4800 Concord Road York, South Carolina 29745 Richard M. Fry, Director Division of Radiation Protection N. C. Dept. of Environment, Health, and Natural Resources 3825 Barrett Drive Raleigh, North Carolina 27609-7721