ML20093D800
| ML20093D800 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 09/18/1984 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-84-475-000 NCR-1819, NCR-2170, NCR-2186, NCR-2187, NCR-2231, PT21-84-475, PT21-84-475-000, NUDOCS 8410110402 | |
| Download: ML20093D800 (2) | |
Text
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' TENNESSEE -VALLEY AUTHORITY
--CH ATTANOOGA, TENN ESSEE 37401 4
400 Chestnut Street Tower II E P 20 g 7., September 18, 1984 jf.
BLRD-50-438/82-37 BLRD-50-439/83-08 1
'U.S.-Nuclear Regulatory Commission
' Region II.
' Attn: Mr. James P. O'Reilly,' Regional Administrator L101 Marietta Street, NW, Suite 2900' Atlanta, Georgia -30323
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 SIXTH INTERIM REPORT The sub' ject deficiency. was initially reported to NRC-0IE Inspector
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R. V. Crlenjak on May 11, 1982 in accordance with 10 CPR 50.55(e) as NCR 1819. This was followed.by our interim reports -dated June 8, and -
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October 29,.1982, and February 8, May 25, and July 28,1983. Related NCRs 2170, 2186, and 2187 were included in our second interim report and NCR-1 2231 was included in ourifourth interim report. Enclosed is our. sixth-
- interim report. We expect to submit our next report on or about. April 24, 1985. We consider 10 CFR Part 21 applicable to this deficiency.3 lIf.you have any questions concerning this matter,' please get in touch with R. H. Shell at FTS 858-2688.
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Very truly yours, TENNESSEE VALLEY AUTHORITY L. M.-Mills, nager
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Nuclear Licensing
. Enclosure oc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement
'U.S. Nuclear Regulatory Commission Washington, D.C.
20555
-Records. Center (Enclosure) i: -
Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500
- Atlanta, Georgia 30339 e
8410110402 840918 PDR ADOCK 05000438 II 2-s PDR An Equal Opportunity Employer
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.j ENCLOSURE '
BELLEFONTE NU' CLEAR PLANT UNITS 1 ' ND 2 A
- FAILURE OF B.I.F. BUTTERFLY VALVS SEATS NCRs 1819, 2170, 2186, 2187,2231 BLRD-50-438/82-37, BLRD-50-439/83-08 10 CFR 50.55(e)
SIXTH INTERIM REPORT
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_t D'scription of Deficiency e
The following butterfly valves, manufactured by Basics Inflow Incorporated (BIF) a unit of General Signal Corporation, West Warwicke, Rhode Island, which are used in the EssentialiAir Systlem were determined to be leaking in excess of an.cceeptable rate.
/
q" BIF Serial UNID Number, Mark No.
Contract No.
Item No.,
Number 1 RJ-VTAC-50B 3BWO471-00-20 76K38-86163-3 577 N-49445-10
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1RJ-VTAC-44B 3BWO471-00-15 76K38-86163-3 576 N-49444-7
'T 1RJ-VTAC-27A 3BWO471-00-15 76K38-86163-3 576 N-49444-2 Further investigation revealed that the rubber seats had failed because of ec damage, i.e., the seats were cut and portions were missing. The cause of the damage was not apparent.
Interim. Progress All of the valves subject to the identified deficiency have been repaired either
TVA has not yet reached a conclusion on the root cause and corresponding actions required. to prevent recurrence of similar deficiencies. TVA will provide a final report apon determination of these concerns.
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