ML19210E203
| ML19210E203 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 11/07/1979 |
| From: | Groce R Maine Yankee |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-79-14, NUDOCS 7912040019 | |
| Download: ML19210E203 (2) | |
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ruc.mun so oe riu e 7-ace can B.4.1.1 LMY 79-125 November 7, 1979 United States Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Attention:
Mr. Boyce H. Grier, Director
References:
(a) License No. DPR-36 (Docket No. 50-309)
(b) USNRC Letter to MYAPC dated July 2, 1979 14E Bulletin No. 79-14; Revision 1 dated July 18, 1979; and Supplement dated August 15, 1979 (c) MYAPC Letter to USNRC dated July 24, 1979 (d) MYAPC Letter to USNRC dated September 25, 1979 (e) MYAPC Letter and USNRC dated May 2, 1979
Dear Mr. Grier:
Subjecc:
Second Supplementary Response to IE Bulletin 79-14 In addition to the field activity reported in our supplementary response to IE Bulletin 79-14, Re ference (d), we have also completed a detailed field check of 80 seismic restraints on safety class systems in Maine Yankee, of which fifty are in the containment and the remaining thirty restraints are outside containment.
These checks were completed on supports for safety class piping 2 1/2" in diameter and larger.
We have committed in Reference (c) to extensive reanalysis of seismic piping and suppotts at Maine Yankee as a consequence of the March 13, 1979 Show Cause Order. This commitment involves an exten:ive detailed field check of seismic restraints.
To facilitate the seismic retnalysis, which will yield new support loads, it is necessary to gather the appr>priate information; i.e., piping geometry, restraint location snc restraiit function.
In conjunction with the new analyses a detailed check of the as-built seismic supports. configuration will be completed.
Thi s inforn ation will allow a meaningful comparison of loads from the confirmed reanalyses against the structural capabilities of the as-built seismi.: restra nts.
g70 2B2 7912040
J.-
United States Nuclear Regulatory Commission Novemmber 7, 1979
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Attention:
Mr. Boyce H. Grier, Director Page 2 We have devised this program to ceet, and in fact exceed, the intent and concerns expressed in IE Bulletin 79 ~14.
If you require additional information on this subject, please contact us at your convenience.
Very truly yours, MAINE YANKEE ATOMIC POWER COMPANY W
' Jert H. Groce fenior Engineer - Licensing MMA/kaf 1470 283 e
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