ML20049J561
| ML20049J561 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 03/01/1982 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8203180365 | |
| Download: ML20049J561 (2) | |
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TENNESSEE VALLEY AUTHOR.'TY
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U.S. Nuclear Regulatory Commission i*,%
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101 Marietta Street, Suite 3100 3
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Mr. James P. O'Reilly, Regional Administrator
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Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - VIKING FLOW CONTROL VALVES IN FIRE PROTECTION SYSTEM - BLRD-50-438/82-76, BLRD-50-439/82 SECOND INTERIM REPORT The subject deficiency was initially reported to_ NEC-0IE Inspector R. V. Crlenjak on November 24, 1981 in accordance with 10 CFR 50.55(e) as NCR BLN MEB 8103 This was followed by our first interim report dated December 22, 1981. Enclosed is our second interim report. We expect to submit our next report by June 8, 1982. 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 L. M. Mills, h nager Nuclear Regulation and Safety r
Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 gyy1c1AL CO B203180365 820301
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b gDRADOCK05 38 An Equal Opportunity Employer
J, ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 VIKING FLOW CONTROL VALVES IN FIRE PROTECTION SYSTEM BLRD-50-438/82-76, BLRD-50-439/82-75 10 CFR 50.55(e)
SECOND INTERIM REPORT Description of Deficiency The Viking model G-1 and G-2 flow control valves which are used in the High-Pressure Fire Pgotection System (RF System) will not regulate outlet pressure to 25 lb/in as required by the acceptance criteria in Preoperational Test PT-RF-01.
Severe system vibrations occur when attempts are made to regulate the valves under the high inlet pressure and low flow conditions established by the Preoperational Test. These conditions are equivalent to those that would result if water was flowing from a single sprinkler head.
The model G-1 and G-2 flow control valves are manufactured by Viking Corporation of Hastings, Michigan. The manufacturer's catalog literature indicgtes that the valves will regulate outlet pressure as low as 25 lb/in. However, the literature did not indicate that the valves would not regulate properly under the conditions TVA is establishing during preoperational testing.
Interim Progress TVA is evaluating the root cause of the vibration to determine the appropriate corrective action. TVA will supply additional information on this deficiency in our next report.
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