ML20153D963
| ML20153D963 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 02/07/1986 |
| From: | Orser W PORTLAND GENERAL ELECTRIC CO. |
| To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| WSO-045-86, WSO-45-86, NUDOCS 8602240323 | |
| Download: ML20153D963 (1) | |
Text
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/g Portland General Electric Company 4/g
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Trojan Nuclear Plant P.O. Box 439 6/gy 8/
Rainier, Oregon 97048 l'f,,,,
(503) SS6-3713 February 7, 1986' WS0-045-86 Mr. John B. Martin Regional Administrator, Region V US Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, CA 94596-5368
Dear Sir:
Special Report
' Limiting conditions for operation (LCO) 3.7.8.2 of the Trojan Technical Specifications requires a Special Report be provided if a continuous fire watch is not established within one hour when one or more of the required spray, sprinkler and/or deluge systems are inoperable.
During fire protection modifications, thn water supply to deluge systems 23, 24, 25, 26 and 27 was changed and a system pressure test was performed on the modified system. The system pressure test, however, did not accu-rately reflect the system as modified. As a result, the supply valve to the subject deluge systems was left closed following the test thereby isolating the subject deluge systems. This condition existed without a continuous fire watch posted for approximately four days. Upon discov-ery, the isolation valve was immediately opened restoring the deluge systems to an operabic status. To prevent a reoccurrence of this event, the modification process is being revised to ensure plant drawings are updated after each phase of a modification, as necessary, to ensure system pressure tests are based on the most current system configuration.
Sincerely W. S. Orser General Manager 9602240323 860207 PDR ADOCM O 344 S
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