ML20011A623
| ML20011A623 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 10/15/1981 |
| 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, NUDOCS 8110290195 | |
| Download: ML20011A623 (2) | |
Text
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,,c' TENNESSEE VALLE Y
FtOdR3r tr CHATTANOOGA. TENNESSEE g46Vig ;
- 400 Chestnut et Towe: II October 15,
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v BLRD-50-438/81-59 p
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Mr. James P. O'Reilly, Director 23 %
8 U.S. Nuclear Regulatory Commission
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Office of Inspection and Enforcement m
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Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNIT 1 - EXCESSIVE PIPE AND SUPPORT VIBRATION DURING EQUIPMENT OPERATION - BLRD-50-438/81 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on September 15, 1981 in accordance with 10 CFR 50.55(e) as NCR 1572. Enclosed is our first interim report. We expect to submit our next report by April 13, 1962.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 857-2581.
Very truly yours, TENNESSEE VALLEY AUTHORITY L.M. Mills,MlanagerSS Vf.
Nuclear Regulation and Safety Enclosure cc:
Mr. Victor Stello, Jr., Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 T6>7 3
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I 0110290195 91!O15 gDRADCCK 05000438 PDR An Equal Opportunity Employer
G ENCLOSURE BELLEFONTE NUCLEAR PLANT UNIT 1 NONCONFORMANCE REPORT BLN NCR-1572 EXCESSIVE PIPE AND SUPPORT VIBRATION DURING EQUIPMENT OPERATION BLRD-50-438/81-59 10 CFR 50.55(o)
FIRST INTERIM REPORT Description of Deficiency During operation of essential air compressor 1RJ-MCMP-001-A, Control Air System piping and pipe support 1RK-MPHG-0093 vibrated excessively when the compressor was running in the half load condition. Movement was approximately one inch in each direction.
Quality Control Investigation Report QCIR-11,717 was written at the site to track and document the subject deficiency.
Interim Progress Subsequent inspection of the piping system revealed that a normally closed bypass valve was partially open. After closure of the valve, additional operation and testing of the system did not indicate excessive system vibration.
A revised seiemic analysis of the current system configuration has been issued. Following design and installation of new supports resulting from that analysis, the piping system will undergo preoperational testing covering a compte.e range of operating conditione. Vibration measurement, which is an element of the preoperational testing program, will indicate whether a problem still exists.
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