ML20028G657
| ML20028G657 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 02/08/1983 |
| 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 8302170207 | |
| Download: ML20028G657 (2) | |
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TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II February 8, 1983 BLRD-50-438/82-37 BLRD-50-439/83-08 w
U.S. Nuclear Regulatory Connaission Region II j
Attn:
Mr. James P. O'Reilly, Regional Administrator
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101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 g
Dear Mr. O'Reilly:
c-BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - FAILURE OF E I.F. BUTTERFLY VALVE SEATS - BLRD-50-438/82-37, BLRD-50-439/83 THIRD INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. 7. Celenjak 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. Enclosed is our third interim report. We expect to submit our next report by May 31, 1983 We consider 10 CFR Part 21 applicable to this deficiency.
As a result of TVA's investigations to determine the cause of this deficiency, additional related deficiencies were discovered. Consequently, since the disposition of the deficiency cited in NCR 1819 has alree.dy been approved by TVA, NCR 2170, cn unit 2 and NCRs 2186 and 2187, both on unit 1 were initiated to docurnent the additional deficiencies and are included as part of this 50.55(e)' concern.
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 L.
M.' Mills, Manager Nuclear Licensing Enclosure cc: Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555
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- i ENCLOSURE BELLEFONTE NUCLEAR PLANT UNIT 1 FAILURE OF B.I.F. BUTTERFLY VALVE SEATS NCRs 1819, 2170, 2186, 2187 BLRD-50-438/82-37, BLRD-50-439/83-08 10 CFR 50.55(e) 4 THIRD INTERIM REPORT Description of Deficiency 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 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 l
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.
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Interim Progress TVA has received the response 'from BIF indicating their recommended I
disposition. TVA is presently reviewing BIF's response and will provide another report upon. completion of our review..
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