ML20028E016
| ML20028E016 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 01/14/1983 |
| 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 8301200254 | |
| Download: ML20028E016 (2) | |
Text
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TENNESSEE VALLEY AUTHORITY CHATTANOOGA, TENNESSEE 374ot 400 Chestnut Street Tower II c4 January 14, 1983 o.
7-.
-y BLRD-50-438/81-76 3
BLRD-50-439/81-75 U.S. Nuclear Regulatory Consission b
Region II Attn: Mr. James P. O'Reilly, Regional Administrator g
101 Marietta Street, Suite 3100 e
Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - VIKING FLOW CONTROL VALVES IN FIRE PROTECTION SYSTEM - BLRD-50-438/81-76, BLRD-50-439/81 FIFTH INTERIM REPORT The subject deficiency was initially reported to NRC-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 interim reports dated December 22, 1981 and March 1, June 7, and October 4, 1982. Enclosed is our fifth interim report. We expect to submit our next report by June 7, 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 L. M. Mills,
% nager Nuclear Licensing i
Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
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An Equal Opportunity Employer
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- u ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 VIKING FLOW CONTROL VALVES IN FIRE PROTECTION SYSTEM BLRD-50-438/81-76, BLRD-50-439/81-75 NCR BLN MEB 8103 e
FIFTH INTERIM REPORT Description of Deficiency The Viking model G-1 and G-2 flow control valves which are used in preacgionsprinklersystemswillnotregulateoutletpressureto25 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 (i.e., high inlet pressure and low flow).
Interim Progress TVA has initiated engineering change notice (ECN) 1584 which implements the revision of the drawings affected by the valve modification detailed in our previous reports. TVA has not yet completed the drawing revisions.
Consequently, ECN 1584 is not yet closed. TVA will supply a final report upon closure of this ECN.
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