ML20071F199
| ML20071F199 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 03/03/1983 |
| 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 8303140430 | |
| Download: ML20071F199 (2) | |
Text
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TENNESSEE VALLEY AUTHORITY,,Ngg pppjp,;, ;,
(pl jag CH ATTANOOGA, TENNESSEE 37401
,a 400 Chestnut Street Tower II March 3,19833 g 7 A10 : 59 BLRD-50-438/83-19 BLRD-50-439/83-15 U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, Suite 2900 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - PRESSURE DROP ACROSS VELAN 2-1/2-INCH STOP/ CHECK VALVE - BLRD-50-438/83-19, BLRD-50-439/83 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector A. K. Hardin on February 2, 1983 in accordance with 10 CFR 50.55(e) as NCR 2212. Enclosed is our first interim report. We expect to submit our next report by September 23, 1983 We consider 10 CFR Part 21 applicable to this deficiency.
If you have any questions concerning this matter, please get in touch with H. 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 OFF Q 8303140430 830303 r.
PDR ADOCK 05000438 An Equal Opportunity Employer
ENCLOSURE
's BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 PRESSURE DROP ACROSS VELAN 2-1/2-INCH STOP/ CHECK VALVE NCR 2212 BLRD-50-438/83-19, ELRD-50-439/83-15 10 CFR 50.55(e)
FIRST INTERIM REPORT Description of Deficiency During flushing operations of the makeup and purification (MU/P) and high pressure injection (HPI) systems, seven of nine 2-1/2-inch 1500 lb. Velan stop/ check valves intermittently failed to fully open and/or have shown indication of excessive pressure drop.
Interim Progress Each valve was disassembled and no blockage or defect could be found.
Therefore, TVA has been unable to determine the cause of the deficiency. TVA's investigation is continuing, and we expect to return one of the subject valves to Velan for testing.
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