ML19340D808
| ML19340D808 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 12/29/1980 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, IEB-79-14, NCR-SQNSWP-8023, NUDOCS 8101050405 | |
| Download: ML19340D808 (2) | |
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TENNESSEE VALLEt AUTHORITY CH ATTANooGA. TENNESSEE 37401 400 Chestnut Street 'Iower II E
December 29, 1980 Tl
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Mr. James P. O'Reilly, Director Office of I tion and Diforcement U.S. Nuclear latory Ctanission Region II - Suit 3100 101 Marietta Str Atlanta, Georgia 3 03
Dear Mr. O'R! illy:
SEQUOYAH NUCLEAR PLANT UNIT 2 - SEI9fIC ANALYSIS EUR AS-RJILT SAFEIY-REIATED PIPING SYSTEMS - ?CR SQNSNP 8023 - FIRST INTERIM REPORT
'Ibe subject deficiency was initially reported to NBC-OIE Inspector R. W. Wright on November 28, 1980, in accordance with 10 CFR 50.55(e).
Enclosed is our first interim report. We expect to subnit our next report by March 2, 1981.
If you have any questions, please get in touch with D. L. Iambert at ETS 857-2581.
Very truly yours, TENNESSEE VALLEY AUIBORITY N
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M. Mills, Manager Nuclear Regulation and Safety Enclosure
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Mr. Victor Stello, Director (Enclosure)[
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Office of Inspection and Enforcement gf U.S. Nuclear Regulatory Ccmuission Washington, DC 20555 g
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o DCIOSURE SEQUOYAH WCLEAR PIANT UNIT 2 SEISMIC ANALYSIS FOR AS-BUILT SAFE'IY-REIATED PIPING SYSTEMS NCR SQNSWP8023 10CFR50.55(e)
FIRST INTERIM REPORT Description of Deficiency
@ is E R was generated as a result of IE Bulletin 79-14. @ e as-built configurations of various safety-related piping systems have revealed a number of nonconformances to design drawings. tese discrepancies between as-built and as-designed piping and hangers could affect the validity of the seismic analyses. Design specifications and drawings are used to obtain input information for seismic analysis of safety-related systems. As a result, various safety-related systems may not be seismically qualified.
Corrective Action Approximately 50 percent of the piping and 25 percent of the hangers have already been inspected.
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