ML20052H988

LER 82-011/03L-0:during 820412-20,plant Operated in Degraded Mode of Limiting Conditions for Operation 4.2.11 Three Times & 4.2.10 Once.Caused by Offgas of Moisture from Core as Plant Returned to Power from Maint Outage

ML20052H988
Person / Time
Site:	Fort Saint Vrain
Issue date:	05/12/1982
From:	Fuller C PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20052H984	List: ML20052H983 ML20052H988
References
LER-82-011-03L, LER-82-11-3L, NUDOCS 8205240277
Download: ML20052H988 (1)

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NRC F0qM 366 U.S. NUCLEAR KEGULATORY COMMISSION (7 77)

LICENSEE EVENT REPORT  ?

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

CONTROL 8 LOCK: l l l l l l lh l0 l11 7 s J l C ILICENSEE 01 F CODE l S l V l 1 l@l 0 l0 l- 10 14 ts

!0 l 01010 l- 101025 l@l4 LsCENSE NUM8ER 26 Il LICENSE 11 12TYPE l 030l@lS7 CATl 58 l@

CON'T 10111 5[,C l L l@l 015 l 01010 l 21617 l@l690 l aEVENT 11DATE121812 l@l01511 74 75 12181280l@

REPORT 0 ATE

/ 6 ou 61 DOCK ET NUMSE R 64 EVENT DESCRIPTION AND pro 8 ABLE CONSEQUENCES h Io 121 I During the period April 12, 1982, to Aoril 20, 1982, with the reactor at oower oner- 1 i o i 3, j ation below 20%, the plant was operated in a degraded mode of LC0 4.2.11 on three l io i4i [ separate occasions and LC0 4.2.10 on one occasion. These events are reportable per I i o ,3 i g Fort St. Vrain Technical Specification AC 7.5.2(b)2. There was no effect on public l i o is j l health or safety. Related reports are R0's81-020, 81-009, 80-36, 80-19, 80-11, l

[O;7 l79-02, and 78-39. l I

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

it ioi l A gradual ingress of moisture and oxidants occurred durina a orolonced maintenance I li li l loutage which involved depressurizing the PCRV on several occasions. As the olant was I i, , .,i j returned to power with corresponding higher temperatures , the resul t was off-cassino l g j of mois ture from the core. Reactor power and temperatures were limited during de- l i, i ., i i graded modes of operation. The reactor scrammed during some events which removed the l

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NUV8ER TYPE DESCRIPTION l i l 71 l 0 [ 0 [ 0 l@l Z l@l N/A l PERSONNE't iN;u' RIES NuYBE R DESCRIPTION l

li la 8l l9 01010 l@l N/A 1 11 12 80 TYPE DESC PT ON l

l i 191 l z l@liO N/A 7 , 8205240277 820512 80 PUBLICITY PDR ADOCK 05000267 NRC UsE ONLY

• ISSU E D S "DR L_{0,,,J l N l@l DESCRIPTION N/A ,

I IIIIIIllI!I!II 7 8 3 10 g 68 69 80 1 NAME OF PREPARER PHONE: (303) 785-2224 2 l __ _ .