ML20083N473
| ML20083N473 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 01/24/1983 |
| 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 8302010664 | |
| Download: ML20083N473 (2) | |
Text
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3 TENNESSEE VALLEY AUTHORITY CH ATTANOOGA, TENNESSEE 37401 400 Chestnut Street Tower II January 24, 1983
_w BLRD-50-438/82-52 U.S. Nuclear Regulatory Commission Q
Region II T
Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, Suite 3100 E
Atlanta, Georgia 30303
Dear Mr. O'Reilly:
P BELLEFONTE NUCLEAR PLANT UNIT 1 - FAILED VALVE CONTROL UNIT -
BLRD-50-438/82 THIRD INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector i
R. V. Crlenjak on July 27, 1982 in accordance with 10 CFR 50.55(e) as NCR 1891. This a s fellowed by cur interim reports dated August 25, and October 20, 1982. Enclosed is our third interim report. We expect to submit our next report by July 27, 1983 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 Ds %
Jet 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 Q~ COPY
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8302010664 830124
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PDR ADOCK 05000438 PDR An Equal Opporturnty Employer
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNIT 1 FAILED VALVE CONTROL UNIT NCR 1891 BLRD-50-438/82-52 10 CFR 50.55(e)
THIRD INTERIM REPORT Description of Deficiency The large expansion valve control unit, supplied by Air Conditioning, Refrigeration and Combustion, Incorporated (ARC) of Knoxville, Tennessee, and man';factured by Dunham-Bush, for the water chiller (1VE-MCHL-172-B) in the Auxiliary Building Air Conditioning System failed. This item regulates the refrigerant to the chiller which provides cooling for safety-related equipment.
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~ ' The control unit is an electronic device with a' limited shelf-N fe.
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Failure appears to' be~ attributable-to three 'to four years of' me:m &;:
inactivity of the electronic parts inside the-sealed control unit.
4-This problem has occurred on one other unit, and we believe that this P'
condition could be a generic problem for all of these chillers.
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The subject control unit was replaced.with an??3*.'Y':'"tM@*'.M,"?f ??@QQ}f~ XM2 i
identical control unit.
by the vender service representative ~ under the warranty provisions of the contract. TVA is presently investigating the generic implications and action required to prevent reoccurrence.
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