ML20134E663

Informs That GL 94-03 Augmented Exams of Plant,Unit 2,core Shroud Will Be Performed During 1999 Refueling Outage

ML20134E663
Person / Time
Site:	Limerick
Issue date:	10/28/1996
From:	Hunger G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-94-03, GL-94-3, NUDOCS 9611010311
Download: ML20134E663 (3)

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Etation Support Department

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GL 94-03 E

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PECO NUCLEAR rem e-c-965 chestert> rook Bouievard A Unit of PECO Energy Wayne. PA 19087-5691 i

October 28,1996

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Docket No. 50-353 License No. NPF-85 I

r U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

Limerick Generating Station, Unit 2 Submittal of Inspection Plan in Response to Generic Letter 94-03, "Intergranular Stress Corrosion Cracking of Core Shrouds in Boiling Water Reactors" i

Dear Sir:

On August 24,1994, PECO Energy Company responded to Generic Letter (GL) 94-03, dated July 25,1994, for Limerick Generating Station (LGS), Units 1 and 2, and Peach Bottom Atomic Power Station (PBAPS), Un:ts 2 and 3. Reporting Requirement 2 of the GL requested that an inspection plan of the core shroud i

be submitted to the U. S. Nuclear Regulatory Commission (USNRC) no later j

than 3 months prior to performing the inspections except for those plants whose inspections would occur less than three months from the receipt of the' GL. Our response for LGS, Unit 2, indicated that an augmented inspection program for the core shroud would be developed in consideration of recommendations by the Boiling Water Reactor Vessel and intomals Project (BWRVIP).

The BWRVIP recommendations are specified in the "BWR Core Shroud Inspechon and Flaw Evaluation Guidelines," GENE-523-113-0894, Revision 1, dated March 1995. This document was submitted to the USNRC on April 25, 1995 by the BWRVIP. The LGS, Unit 2, core shroud is considered highly resistant to Intergranular Stress Corrosion Cracking (IGSCC) due primarily to plant water chemistry, material carbon content, fabrication history, neutron fluence and hot operating time.

AcGli 9611010311 961028 PDR ADOCK 05000353 G

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October 28,1996

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The LGS, Unit 2, core shroud has been identified by the BWRVIP document, Table 3-1, as an inspechon Category A plant based on: 1) the core shroud has l.

been fabricated with low carbon content Type 304L stainless steel; 2) the core shroud has experienced less than eight (8) hot operating years, and; 3) the core shroud has consistently been exposed to water chemistry below BWR Water Chemistry Guideline Action Levels. An inspechon Category A plant is not expected to experience core shroud cracking in the near term and, as such, i

augmented examinations are not considered necessary at this time.

Commensurate with inspection Category A, augmented examinations of the LGS, Unit 2, core shroud are not planned for the January 1997 Refueling Outage (2R04). This is based on the satisfactory completion of the LGS, Unit 2, ASME Code Section XI, in-vessel visual inspection (lWI) conducted during 1995 (2R03) and the LGS, Unit 1, GL 94-03 augmented ultrasonic examinations of the core shroud conducted during 1996 (1R06).

Pursuant to the staff's conclusion in the Safety Evaluation Report for LGS, Unit 2, dated March 13,1995, concerning this same subject, the augmented examination should be performed no later than the first refuel outage after LGS, i

Unit 2, surpasses eight (8) on-line years of operation in 1998. Accordingly, the GL 94-03 augmented examinations of the LGS, Unit 2, core shroud will be performed during the 1999 Refueling Outage (2R05).

If you have any questions or require additional information, please do not hesitate to contact us.

Very truly yours, L

G. A. Hunger, Jj.. d. / e up.

Director-Ucensing cc:

H. J. Miller, Administrator, USNRC, Region i N. S. Perry,' USNRC Senior Resident inspector, LGS i

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COMMONWEALTH OF PENNSYLVANIA :

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COUNTY OF CHESTER i

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D. B. Fetters, being first duly swom, deposes and says:

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That he is Vice President of PECO Energy; the Applicant herein; that he has read the enclosed response to Generic Letter 94-03 dated July 25,1994, for the Limerick Operating License NPF-85, and knows the contents thereof; and that the statements and matters set forth therein are true and correct to the best of his knowledge, information and belief.

1 k ].3 Vice President Subscribed and swom to before me thi ay of hM 1996.

b Not./ Public

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