ML20247F800

Ro:On 890325,train B narrow-range North Containment Sump Level Instrument Failed Channel Check.Caused by Air in-leakage Into Sealed Ref Leg of Transmitter.Replacement Planned During 1989 Refueling Outage Scheduled on 890406

ML20247F800
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	03/27/1989
From:	Guberski J PORTLAND GENERAL ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 8904040038
Download: ML20247F800 (2)

Text

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"*8 ' co u a,s r rs se m,r1 9p c  !SS +$r2 OI 3 W, evtNT otSCRIPfl0N ON March 25, 1989 at 0155 the 'B' train narrow range north .

containment sump level instrument failed its channel check. The  !

I narrow range instrument is reading approximately v io" higher than l the wide range. An alternate inozcation is available at the ,

radwaste control panel, C-151, and io being used per plant procedures (PDT 24-5). The cause of the fa11ura is j be air in-leakage into the sealed refereni:e line suspected to i i

,.,. of the I

?,' 't'ransmi t te r , based on past experiences with these type of '

transmitters. Replacement is not planned at this time as a i containment entry is required to replace the transmitter, which 1 is located in a highly contaminated sump area, Replacement is i

planned during the 1989 refueling outage, si:heduled to begin April 6, 1999. .

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l Portland General Electric Company Trojan Nuclear Plant 71760 Columbia River Hwy Rainier. Oregon 97048 F,ECE!WC W' (503) 556 3713

'89 MAR 29 A9:15 l

This is a "next working day" written confirmation of the attached telephone notification, (made at 1657,3/27/89) as required by Trojan Technical Specification 3.3.3.9, " Accident Monitoring Instrumentation."

DATES.._ _. h,[ . ,f ...,_. ___._.,_, . _ . . . . _ . . , , _ _ _ , , _ . . , , ,

NUMfGH OF PAGES TO FOLLOWs /

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TELECOPY NtlNBER . f.$)... _k.W_2 .k_.,,.,,_..._..__.

VERIFICATION: _ .h 9@2., [ ( 1.,,,7.3$_7 / ..._._

T r n e s e m i _ _ ._ __.. . _. ._ _ _._ _ ...._. _ . _ . _._ . _ _. _. .

IF THERE IS ANY DIFFICULTY IN RECEIVING 1HIS TELECOP7, FLEASE CALL THE SWITCHBOARD OPERATOR A1 (503) S$61371;3.

MACHINES: MllLTIFAX x331 / NEFAX - x349 VERIIYi (003) 556 3713 4

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