ML20043B046

Special Rept:On 900406,containment Electrical Penetration Assembly AZ07 Inoperable for Period Exceeding 30 Days. Electrical Penetration Assembly Conductors Serving Seismic Instruments Worked & Returned to Svc on 900509

ML20043B046
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	05/16/1990
From:	Yundt C PORTLAND GENERAL ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CPY-169-90SR6, R-900516, R0-900516, NUDOCS 9005240117
Download: ML20043B046 (1)

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. Portland General Electric Company j

Trojan Nuc! car Plant

-MayJ16, 1990 1

CPY-169-90Sk6'

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-71760 Columbia Rivei flwy

- Rainier. Oregon 97048.-

l (503) 556-3713

-U.S. Nuclear Regulatory Commission ^

'f Document Control Desk--

i Washington DC20555L t

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' Gentlemen:-

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11 Special Report On March 19.-1990, the Trojan Nuclear. Plant was shutdown for...the 1990 i

refueling and maintenance outage.; On April 6,.1990,. Containment electrical' penetration assembly: AZO 7'was. removed from service'forfreplacement.'. This penetration serves, among.'other equipment, the ContainmentLBase' Slab and'

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containment Wall. Seismic Instruments.

Removal of-the penetration' assembly' r

from service rendered these Seismic Instruments inoperable. ' Trojan Technical' specification-(TTS) 3.3.3.3, Seismic Instrumentation,' requires:

these-instruments to be operable:at all times,.and requires; submittal"of..a di Special Report if they are inoperable for.'a period exceeding 30' days..Due 7

-to difficulties encountered in-the replacement of electrical' penetration assembly AZO 7 the affected Seismic Instruments were not-restored to operable status within'30 days..This report is-submitted'in accordance 4

with the requirements of TTS 3.3.3.3'and 6.9.2, SpecialLReporto.

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The electrical penetration assembly conductors serving-the Seismic i-Instruments were worked early in May 1990~and the instruments were returned-j

.to service on May 9, 1990.

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n General Manager 1

-Trojan' Nuclear P1 ant c:

Mr. John B. Martin Regional Administrator, Region V U.S. Nuclear Regulatory Commission Mr. David Stewart-Smith' State of Oregon Department of Energy Mr. R. C. Barr i

NRC Resident' Inspector

Trojan Nuclear Plant I

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