ML19291C309

Submits Mods to Clarify Discrepancies in NRC Re Response to IE Bulletin 79-14, Seismic Analysis for As- Built Safety-Related Piping Sys. Final Rept of Insp Program Will Be Forwarded within 90 Days After Jan 1980 Restart

ML19291C309
Person / Time
Site:	Maine Yankee
Issue date:	11/30/1979
From:	Moody D Maine Yankee
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
IEB-79-14, NUDOCS 8001240159
Download: ML19291C309 (2)

Text

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ENGINEERING OFFICE WESTBORO, MASSACHUSETTS 01581 617-366-9011 B.4.2.1 WMY 79-139 November 30. 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 hc. DPR-36 (Docket No. 50-309)

(b)

USNRC Letter to MYAPC dated July 2, 1979 I&E 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, 1% 9 (e) MYAPC Letter to USNRC dated May 2, 1979 (f) MYAPC Letter to USNRC dated November 7, 1979 (g)

USNRC I&E Letter to MYAPC dated November 19, 1979

Subject:

Maine Yankee I&E Bulletin 79-14 Cottmitment Upon careful review of your letter, Reference (g), we have noted some dis-crepancies between our earlier conversations and the letter text.

To prevent any possible misunderstanding we are providing the following modification to your letter:

1.

Verification of as-built piping configuration is being performed in accordance with the inspection elements identified in Reference (b) except for piping support details and valve weights, with the following status to date:

a.

Inspections inside the containment are complete.

b.

Inspections not including valve weights and support details out-side containment are greater than 90 percent complete and will be completed by December 1, 1979.

c.

No nonconformances affecting the seismic qualifications of safety-related systems have been identified.

1794 551

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United States Nuclear Regulatory Commission November 30, 1979 Attn:

Mr. Boyce H. Grier, Director Page 2 2.

Verification of piping support details has been completed on 80 supports (50 inside containment and 30 outside) for piping 2 inches in diameter and larger.

Verification of as-built support details for the remaining supports will be completed prior to restart from the January 1980 refueling outage.

3.

Verification of valve weights has not been performed, but will be completed prior to restart from the 1980 refueling outage.

4.

Nonconformances with your existing seismic analysis, identified during the above inspections will be evaluated promptly in accordance with Reference (b).

Any nonconformance identified which compromises the seismic qualification of a safety-related system will be reported to this office within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and the plant will be placed in cold shutdown within 7 days of identification of the nonconformance or as specified by Technical Specifications, whichever is less, until repairs are cumpleted.

For nonconformances which affect seismic qualification of safety related systems identified during the outage, corrections / reanalysis will be com-pleted prior to restart.

5.

A final report of the inspection program, describing the results of the inspections, will be submitted to your office within 90 days after restart from the January, 1980 refueling outage.

This report will contain the information specified in IE Bulletin 79-14, paragraphs 3 and 4.

If you require additional information on this matter, please do not hesitate to contact us.

Very truly yours, MAINE YANKEE ATOMIC POWER COMPANY h

Donald E. Moody Manager of Operations RHG/sec 1794 352