ML20154A634

From kanterella
Jump to navigation Jump to search
Forwards Westinghouse Proprietary WCAP-11799 & Nonproprietary WCAP-11800, Beaver Valley Unit 1 Evaluation for Tube Vibration Induced Fatigue, Per NRC Bulletin 88-002.Proprietary Rept Withheld (Ref 10CFR2.790)
ML20154A634
Person / Time
Site: Beaver Valley
Issue date: 05/04/1988
From: Sieber J
DUQUESNE LIGHT CO.
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML19302D586 List:
References
IEB-88-002, IEB-88-2, NUDOCS 8805160073
Download: ML20154A634 (2)


Text

_ _. .-. -- . _ .

.k*

M[ Telephone (412) 39H000 00m SNppingport. PA 150774)N May 4, 1988 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Reference:

Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 NRC Bulletin 88-02 Gentlemen:

In our reply to NRC Bulletin 88-02 "Rapidly Propagating Fatigue Cracks in Steam Generator Tubes" dated March 28, 1988, we stated that we would submit an evaluation to address Items C.2.a and C.2.b of the Bulletin for Beaver Valley Unit 1 by May 31, 1988. This evaluation has been completed and enclosed are:

1. WCAP-11799 entitled, "Beaver Valley Unit 1 (5) copies of Evaluation for Tube Vibration Induced Fatigue (Proprietary).

copies WCAP-11800 entitled, "Beaver Valley Unit 1

2. (5) of Evaluation for Tube Vibration Induced Fatigue (Non-Proprietary).

Also enclosed is a Westinghouse thorization letter, CAW-88-033, Proprietary Information Notice, and accompanying Affidavit.

As item 1 contains information proprie*.ary to Westinghouse affidavit signed by Electric Corporation, it is supported by an Westinghouse, the owner of the information. The affidavit sets forth withheld from public the bases on which the information may be disclosure by the Commission and addresses with specificity the considerations listed in paragrapr. (b)(4) of Section 2.790 of the..

Commission's regulations.

Accordingly, it is respectfully requested that the information proprietary to Westinghouse be withheld from public ogg which is in accordance with 10 CFR Section 2.790 of the zo disclosure 9 Commission's regulations, n o-

$$ Correspondence with respect to the proprietary aspects of the Qlj Application for Withholding or the supporting Westinghouse Affidavit CAW-88-03 and should be addressed to R. A.

should reference O$ Wiesemann, Manager of Regulatory & Legislative Affairs, Westinghouse 83 Electric Corporation, P.O. Box 355, Pittsburgh, PA 15230-0355.

goo

\ A"ffbg /

' g // i V ?sA!4 asn , lj$

. Besvar Vollcy Fower Station, Unit No. 1 pocket No. 50-334, License No. DPR-66

g. Page 2 The above evaluation provides the necessary information for NRC review and approval of our long term corrective actions to minimize the probability of a rapidly propagating fatigue failure of a steam generator tube. However, our Enhanced Primary to Secondary Leakrate Monitoring Program will remain in effect as an interim compensatory measure until NRC approval has been granted.

In our initial response to Item C.2 of the Bulletin, we stated that five tubec in the "C" steam generator and one tube in the "A" steam generator had been preventively plugged with leak limiting plugs. The final analysis in the above evaluation concludes that preventive plugging of the one tube (R10C43) in the "A" steam generator was not necessary. Therefore, this tube (R10C43) in the "A" steam generator may be returned to service during a future outage.

If there are any questions concerning this response, please contact my office.

Very truly yours, 3D Ab'er Vice President

/ Nuclear Group Enclosures cc: w/o enclosures Mr. J. Beall, Sr. Resident Inspector Mr. W. T. Russell, NRC Region I Administrator Mr. P. Tam, Project Manager Director, Safety Evaluation & Control (VEPCO)

. - - _ - - . . . - - - , , . . ,