ML20153D963: Difference between revisions
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{{#Wiki_filter:- _ | {{#Wiki_filter:- _ _ _ _ | ||
S/-v/4 | S/-v/4 i | ||
/g Portland General Electric Company 4/g | |||
/ | |||
P.O. Box 439 | Trojan Nuclear Plant P.O. Box 439 6/gy 8/ | ||
Rainier, Oregon 97048 | Rainier, Oregon 97048 l'f,,,, | ||
(503) SS6-3713 | (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:== | ==Dear Sir:== | ||
Special Report | 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. | 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 | Sincerely W. S. Orser General Manager 9602240323 860207 PDR ADOCM O 344 S | ||
from: | DR t | ||
from: h5Dl l' O M}} | |||
Latest revision as of 02:49, 11 December 2024
| 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
- _ _ _ _
S/-v/4 i
/g Portland General Electric Company 4/g
/
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
DR t
from: h5Dl l' O M