ML20153D963

Special Rept:During Fire Protection Mods,Water Supply to Deluge Sys 23,24,25,26 & 27 Changed & Sys Pressure Test Performed on Modified Sys.Supply Valve Left Closed for Approx 4 Days W/O Continuous Fire Watch.Mod Process Revised

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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• Portland General Electric Company Trojan Nuclear Plant 4/g/

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 DR t

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