ML20154R321
| ML20154R321 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 09/26/1988 |
| From: | Morgan W COMMONWEALTH EDISON CO. |
| To: | Murley T Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20154R325 | List: |
| References | |
| 5160K, IEB-88-002, IEB-88-2, NUDOCS 8810040223 | |
| Download: ML20154R321 (2) | |
Text
[] Commonwealth Edison 3
e One First i, atonal Plaza. Chica0o.)Enois '.
's Address Reply to: Poet Omco Box 767 i
Chicago. IEnois 60600 0787 September 26, 1988 2
Mr.cT.t E.'~Murley Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
20555
)
Subject:
Zion Station Unita 1 and 2 Supplemental Response To NRC Bulletin 1
No. 88-02 NRC Docket Nos. 50-295/304 l
References (a) NRC Bulletin 88-02, Dated Tobruary 5, 1988
}
(b) W.E. Morgan Letter To A.B. Davis Dated l
April 8, 1988 j
Dear Mr. Davis i
The above referenced (a) NRC Bulletin requested that holders of operating licenses or construction permits for Westinghouse (W)-designed I
nuclear power reactors with steam generators having carbon steel support plates implement actions specified within the bulletin to minimise the potential for a steam generstor tube rupture event caused by a rapidly propagating fatigue crack sach as occurred at North Anna Unit 1 on Jul'+ 15, t
1987.
Referenced letter (b) provided Commonwealth Edisons original response j
to the subject bulletin.
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l The following attachment provides supplemental information concerning l
l Zion Units 1 and 2 evaluation for tube vibration induced fatigue.
i The attached report concludes that "Zion tubes remaining in service are not espected to be susceptible to fatigue rupture at the top support plate in a manner similar to the rupture that occurred at North Anna 1.
Therefore, J
no modification, preventive plugging or other measures to preclude such an event is necessary." Based on this conclusion this completeo actions required I
as part of HRC Bulletin 88-02.
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l Upon completion of the NRC staff review and approval of the attached d
report, the enhanced leakage monitoring program implemented at Zion Station will be discontinued.
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8S10040223 880926 i
PDR ADOCK 05000295
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PDC I {
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i Note that the attached report is non proprietary. The Westinghouse proprietary attachment is submitted under separate cover with the request that the information which is proprietary to Westinghouse be withheld from public disclosure in accordance with 10CFR Section 2.790 of the Commission's regulations.
Correspondence with respect to the proprietary aspects of the Appliention for Withholding or the supporting Westinghouse affidavit should referance CAW-88-091 and should be addressed to R.A. Wiesemann, Hanoger Regulatory and Legislative Affairs, Westinghouse Electric Corporation, P.O.
Box 355, Pittsburgh, Pennsylvania 15230.
concerning this response to this office.
Please address any questions that you or your staff may have Respectfully f
M W.E. Porgan r
Nuclear Licensing Administrator i
f rf Attachment l
cc Document Control Desk Resident Inspector / Zion i
5160K l
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