ML19340C276

LER 80-059/03L-0:from 801012-21,plant Operated W/Total Primary Coolant Oxidants Greater than 4 Ppm & Average Core Outlet Temp Greater than 1,200 C on Four Occasions.Caused by Offgassing of Oxidants Due to Moisture Ingress

ML19340C276
Person / Time
Site:	Fort Saint Vrain
Issue date:	11/10/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19340C275	List: ML19340C274 ML19340C276
References
LER-80-059-03L, LER-80-59-3L, NUDOCS 8011140401
Download: ML19340C276 (1)

Text

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NRC FGEM 366 U.S. NUCLEAR REGULATORY CoMMISSloN j (7 773

LICENSEE EVENT REPORT CONTROL 8 LOCK

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lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI

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EVENT DESCRIPTICN AND PROS ABLE CONSEQUENCES h I o 12 ] l During the period from October 12 through October 21, 1980, the olant was onerated l

,o,3,  ; with total primary coolant oxidants (the sum of carbon monoxide, carbon dioxide, and _j

, o ,,, l vater) greater than 10 parts per million and average core outlet temperature greater l

,g,3, 9 than 1200*F on four separate occasions. Degraded mcde of LCO 4.2.10, reportable per l 1

I o le 1 I ort St. Vrain Technical Specification AC 7.5.2(b)2.

F Similar occurrences in RO 77-36. l l

! [o i 7I 1 78-12, 78-18, 78-37, 78-39, 79-01, 79-02, 79-24, 79-30, 79-45, 79-53, 80-11, 80-19, l

,o,g, ,80-22, 80-25, and 30-59. No affect on public health and safety. ]

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.I ;i , a , l0ff-gassing of oxidants due to reaction of moisture with core era %ite in11Mn2 (

j is ,,i l moisture ingress of October 2. Helium drver beass on October 15 for valve recaire f I

[, , . i Icontributed to increased moisture levels. In all esses , reduction of reactor cower I

,;3l l resulted in core outlet temperature decreasing to less than 1200'F. thus ending de-ti,4 i ; graded code operation. [

60 7 3 9 s Ah %POWEA CTwtM STATVS is av OtsCCVEnv OESCRIPTION It i5; l E l@ l 0l 310l@l N/A l W gl Review of Logs l 1: 44 45 44 80 1 7 4 9 '3 11 l ACTIVITY OCNTENT 8ELEASED OF RELE ASE AVouNT OF ACTIWTY

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LCSS CP CA DAMAGE TO PACILITY Q i TvPE O E SCRIP'? C N v l1!3lI2lhiN/A l

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63 69 63 3 NAME CF PAEPARER * ' PMCNE; / 03) 7 5-222!. i" l 801114090)

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