ML20024D899
| ML20024D899 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 07/28/1983 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8308080388 | |
| Download: ML20024D899 (2) | |
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s p tT E'b N S: VALLEY AUTHORITY 4 -.
400 C tnut Street Tower II W-gg3 July 28, 1983 BLRD-50-438/82-37 BLRD-50-439/83-08 U.S. Nuclear Regulatory Comission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - FAILURE OF B.I.F. BUTTERFLY VALVE SEATS - BLRD-50-438/82-37, BLRD-50-439/83 FIFTH INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on May 11, 1982 in accordance with 10 CFR 50.55(e) as NCR 1819 This was followed by our interim reports dated June 8, and October 29, 1982, and February 8, and May 25, 1903 Related NCRs 2170, 2186, and 2187 were included in our second interim report and liCR 2231 was included in our fourth interim report. Enclosed is our fifth interim report. We expect to submit our next report by September 18, 1984. We consider 10 CFR Part 21 applicable to this deficiency.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY hb
/gL L. M. Mills, Manager i
Nuclear Licensing Enclosure oc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatery Comission Washington, D.C.
20555 Records Center (Enclosure)
Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 g
.ygtCb 1983-TVA SOTH ANNIVERS ARY An Equal Opportunity Employe-
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EMCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 FAILURE OF B.I.F. BUTTERFLY VALVE SEATS NCRs-1819, 2170, 2186, 2187,2231 BLRD-50-438/82-37, BLRD-50-439/83-08
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FIFTH INTERIM REPORT i
Description of Deficiency The following butterfly valves, manufactured by Basics Inflow Incorporated (BIF) a unit of General Signal Corporation, West W' rwicke, Rhode Island, a
which are used in the Essential Air System were determined to be leaking in excess of an acceptable rate.
BIF Serial UNID Number Mark No.
Contract No.
Item No.
Number 1RJ-VTAC-50B 3BWo471-00-20 76K38-86163-3 577 N-49445-10 1RJ-VTAC-44B 3BWO471-00-15 76K38-86163-3 576 N-49444-7 1RJ-VTAC-27A 3BWO471-00-15 76K38-86163-3 576 N-49444-2 Further investigation revealed that the rubber seats had failed because of
- damage, i.e., the seats were cut and portions were missing. The cause of the damage was not apparent.
Interim Progress TVA has received the vendor's " proof-of-design" test report which indicates that the valves will give acceptable service for the intended application.
The vendor also provided recommendations for long-torm storage of the valves to maximize valve seat shelf life. TVA is currently reviewing these recom6endations to determine what impact, if any, seat degradation had on the failures documented. TVA will provide a final report upon determination of the root cause of the deficiency and the appropriate actions required to prevent recurrence.
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