ML20206H265
| ML20206H265 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 05/06/1999 |
| From: | Buckley B NRC (Affiliation Not Assigned) |
| To: | Geoffrey Edwards PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| GL-94-03, GL-94-3, TAC-MA4541, NUDOCS 9905110123 | |
| Download: ML20206H265 (4) | |
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UNITED STATE 8 g-j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 30006 0001
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May 6, 1999 Mr. Garrett D. Edwards Director-Licensing, MC 62A-1 PECO Energy Company Nuclear Group Headquarters Correspondence Control Desk P.O. Box No.195 Wayne, PA 19087-0195-
SUBJECT:
EVALUATION OF CORE SHROUD INSPECTION PLAN, LIMERICK GENERATING STATION, UNIT 2 (TAC NO. MA4541)
Dear Mr. Edwards:
By letter dated January 12,1999, PECO Energy Company (the licensee) submitted to the U.S.
Nuclear Regulatory Commission (NRC) a core shroud inspection plan for the Limerick Generating Station (LGS), Unit 2, refueling outage (2R05) in response to Generic Letter 94 03, "Intergranular Stress Corrosion Cracking of Core Shrouds in Boiling Water Reactors."
Refueling outage 2R05 commenced on April 16,1999.
The NRC staff understands that LGS Unit 2 is a Category B plant and that the subject inspection plan is based on the guidelines in the Boiling Water Reactor Vessel and Intemals Program (BWRVIP) topical report, BWRVIP-01, "BWR Core Shroud Inspection and Flaw Evaluation Guideline," Revision 2, and Generic Letter 94-03, "Intergranular Stress Corrosion Cracking of Core Shrouds in Boiling Water Reactors." The scope of the inspection plan consists of ultrasonic testing (UT) of the core shroud circumferential welds H-3, H-4, H-5, and H 7. The examinations will be performed at 100% of the accessible length in a 360* segment.
Additional nondestructive examination methods, including eddy current testing and enhanced visual testing as identified in Table 3-2 of BWRVIP-01, may be used as necessary to achieve the targeted baseline examination coverage and/or disposition recorded UT indications. If the cumulative length of flaw indication found in any weld is greater than or equal to 10% of the examined weld length, the scope of the inspection plan will be extended to include welds H-1, H-2 and H-6.
The NRC staff has reviewed the above cited core shroud inspection plan and concludes that the proposed inspection plan for the LGS Unit 2 refueling outage is acceptable because it meets the guidelines in BWRVIP-01. The staff notes that, in case of detecting flaw indications, justification needs to be provided for not including any inspection of vertical welds and ring segment welds in the sample expansion plan. Furthennor9, in preparing the reinspection plan for future refueling outages, the licensee should incorporate the guidelines provided in the 9905110123.990506 PDR ADOCK 05000353 P
i G. Edwards May 6, 1999 NRC staff's safety evaluation dated September 15,1997, and its supplement dated April 27, 1998, or the revised BWRVIP-07 when it becomes available.
This completes our effort on this issue and we are, therefore, closing out TAC No. MA4541.
Sincerely, ORIGINAL SIGNED BY:
Bartholomew C. Buckley, Senior Project Manager, Section 2 Project Directorate i Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-353 cc: See next page DISTRIBUTION:
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G. Edwards NRC staff's safety evaluation dated September 15,1997, and r'.s supplement dated April 27, 1998, or the revised BWRVIP-07 when it becomes available.
This completes our effort on this issue and we are, therefore, closing out TAC No MA4541.
Sincerely, NDa
\\ s+d Bartholomew C. Buckley, Senior Project Manager, Section 2 Project Directorate i Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-353 cc: See next page
9 Mr. Garrett D. Edwards Limerick Generating Station, Units 1 & 2
. PECO Energy Company cc:
J. W. Durham, Sr., Esquire Chief-Divir'm of Nuclear Safety Sr. V.P. Si General Counsel PA Dept. Of Environmente' Resources PECO Energy Company P.O. Box 8469 2301 Market Street Harrisburg, PA 17105-8469 Philadelphia, PA 19101 Director-Site Engineering Manager-Limerick Licensing,62A-1 Limerick Generating Station PECO Energy Company P.O. Box A 965 Chesterbrook Boulevard Senatoga, PA 19464 Wayne, PA 19087-5691 Manager-Experience Assessment Mr. James D. von Suskil, Vice President Limerick Generating Station Limerick Generating Station P.O. Box A Post Office Box A Sanatoga, PA 19464 Sanatoga, PA 19464 Library Platt Manager U.S. Nuclear Regulatory Commission Lim 6 rick Generating Station Region i P.O. Box A 475 Allendale Road Sanatoga, PA 19464 King of Prussia, PA 19406 Regional Administrator, Regior'l Senior Manager-Operations
- U.S. Nuclear Regulatory Commission Limerick Generating Station 475 Allendale Road P.O. Box A King of Prussia, PA 19406 Sanatoga, PA 19464 Senior Resident inspector Dr. Judith Johnsrud U.S. Nuciear Rer;u?atory Commission National Energy Committee Limerick Generating Station Sierra Club P.O. Box 596 433 Orlando Avenue.
Pottstcwn, PA 19464 State College, PA 18803 Director-Site Support Services Limetick Generating Station P.O. Bax A Sanatoga, PA 19464 Chairman Board of Supervisors of Limerick Township 646 West Ridge Pike Linfield, PA 19468 E