ML20044A088
| ML20044A088 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 06/22/1990 |
| From: | Walt T PORTLAND GENERAL ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML19298E184 | List: |
| References | |
| IEB-88-002, IEB-88-2, NUDOCS 9006280053 | |
| Download: ML20044A088 (2) | |
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3 M M M CUtsipturf June 22, 1990 Trojan Nuclear Plant Docket 50-344 Licenso NpF-1
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U.S. Nuclear Regulatory Commission Attn:
Document' Control Desk Washington DC 20555
Dear Sirs:
i Nuclear Regulatory Commission (NRC)Bulletin 88-02, Rapidly Propagating Fatigue Ctacks in Steam Generator Tubes By letter dated December 23, 1988, Portland General' Electric Company (PCE) provided the' final report evaluating'actlons-nocospary to minimize tho j
potential for a steam generator tube rupture caused by high-cycle fatigue such as occurred at North Anna Unit 1:in 1987. Our letter included 1
enclosuro of both proprietary.(WCAP-12024) and nonproprietary (WCAP-12023)
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versions'of the report entitled " Trojan Plant Evaluatlon for Tube Vibration-Induced Fatigue". By letter dated March 19, 1990,- PGE provided responses toLfour questions which the NRC asked concerning our December 23, 1988.lotter.
By telephone call of May 30, 1990, the NRC requested that PCE document to them the scope of the review which was performod in addressing their four questions. The scopo Included a review of all the tubo Anti-Vibration Bar
( AVB) maps for Trojan.
During the review, three additional tubos wero I
identifled for reevaluation. Attached are the results of the reevaluation, which determined that the three tubes are acceptable for continued service.
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PDR ADOCK 05000344
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PDC l
121 S.W SNmen SPeet. Portanct Oregon 97204
s e; Portland Genera: Doctric
' Document Control Desk
' June 22, 1990 Page 2 Please note that information contained in the attachment is proprietary to Westinghouse Electric Corporation.
It is respectfully requested that the information be withheld from public disclosure in accordance with Title 10 of the Code of Federal Regulations,-Section 2.790 (10 CFR 2.790) as requested and.
provided for in our letter of December 23, 1988.
Sincerely, T. D. Walt Acting Vice President, Nuclear Attachment c:
Mr.' John B. Martin Regional Administrator, Rogion V U.S. Nuclear Regulatory Commission Mr. David Stewart-Smith State of Oregon Department of Energy, w/o Attachment Mr. R. C. Barr NRC Resident Inspector
' Trojan Nuclear Plant Subscribed and sworn to before me this 22nd day of June 1990, t
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Noh ry Pubil'c\\of regon k
My Commission Expires:
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