ML20087G642
| ML20087G642 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 08/11/1995 |
| From: | Keaten R GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 5000-95-0080, 5000-95-80, C321-95-2213, GL-89-10, NUDOCS 9508170146 | |
| Download: ML20087G642 (2) | |
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A GPU Nuclear Corporation
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g gs One Upper Pond Road Vf w me" Parsippany, New Jersey 07054 201-316-7000 TELEX 136-482 Writer's Direct Dial Number;
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August 11, 1995 C321-95-2213 5000-95-0080 U. S. Nuclear Regulatory Commission Att: Document Control Desk Washington, DC 20555 i
Gentlemen:
Subject:
Oyster Creek Nuclear Generating Station (OCNGS)
Docket No. 50-219 Facility Operating License No. DPR-16 IGSCC Inspections - RWCU Welds Outside Second Isolation Valve i
References:
(1)
GPU Nuclear Letter C320-92-2142, " Outage 14R IGSCC Activities," June 26, 1992.
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(2)
NRC Lette* dated September 30,1992, " Review of Proposed
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Changes of IGSCC Inspection Program for Oyster Creek Cycle 14R Rriueling Outage (TAC No. M83985)."
(3)
GPU Nuclear Letter C321-95-2055, " Generic Letter 89-10 Report," February 17, 1995.
in Reference 1, item 4. GPU Nuclear proposed a change to the Oyster Creek Intergranular j
Stress Corrosion Cracking (IGSCC) Inservice Inspection Program and provided technical justification for not inspecting the Reactor Water Cleanup (RWCU) system welds outside the second isolation valve as suggested by NRC Generic Letter 88-01, "NRC Position on IGSCC in BWR Austenitic Stainless Steel Piping," Supplement 1. This Generic Letter recommended inspection of the subject piping on a sampling basis of at least 10% of the weld population each refueling outage until completion of NRC Generic Letter 89-10, " Motor Operated Valve Program," activities.
Subsequently, in Reference 2, Enclosure item (2), the NRC reviewed GPU Nuclear's technical justification for inspection relief and, since GPU Nuclear had not yet completed GL g 0 89-10 recommended actions, required GPU Nuclear to inspect the subject piping with a Q
minimum of 10% samoline during each refueling outage.
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C321-95-2213 Page 2 l
In Reference 3, GPU Nuclear notified the NRC that all recommended actions for GL 89-10, including modifications to significantly increase the available margins for RWCU valves, were completed during the 15R Outage.
During the past three outages, GPU Nuclear has inspected all the RWCU welds inboard of the containment isolation valves (38 welds) and found no IGSCC indications. In addition, GPU Nuclear has inspected 29 of 85 welds outboard of the second containment isolation valves and likewise found no IGSCC indications. Based on these past inspection results, completion of all recommended GL 89-10 actions, and the other technical justifications provided in Reference 1, Item 4, GPU Nuclear will not inspect for IGSCC RWCU welds outside the second isolation valve during refueling outages effective with the 16R Outage currently scheduled to begin in September,1996.
Accordingly, in compliance with Oyster Creek Technical Specification 4.3.1, GPU Nuclear is notifying the NRC of our intent to no longer perform these RWCU weld inspections as part of the Oyster Creek IGSCC Inservice Inspection Program.
Very truly yours, R. W. Keaten Vice President and Director Technical Functions RTZ/plp c:
Administrator, Region 1 Senior Resident inspector Oyster Creek NRC Projec; Manager l
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