ML19210C430

LER 79-045/03L-0:on 791008,primary Coolant Oxidants Exceeded 10 Parts Per Million W/Average Core Outlet Temp Greater than 1,200 F.Caused by Residual Moisture Outgasing Due to Dryer Bypass.Load Decreased & No Corrective Action Required

ML19210C430
Person / Time
Site:	Fort Saint Vrain
Issue date:	11/07/1979
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19210C429	List: ML19210C428 ML19210C430
References
LER-79-045-03L, LER-79-45-3L, NUDOCS 7911140241
Download: ML19210C430 (6)

Text

NRC FpRM 366 w. a. mucLean neuvem un e cumnissaiva (7 77) ~

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60 61 DOCKET NUM8ER 68 69 EVENT DATE 74 75 REPORT CATE 80 EVENT DESCRIPTION AND PRCB ABLE CONSEQUENCES h o 2 l On four occasions between October 8.1979. and October 15. 1979. oricarv coolant o,ci- I o 3 l dants (sum of water, carbon dioxide, and carbon mo toxide) exceeded 10 carts per I o i4 l million with average core outlet tecperature greater than 1,200*F. This is operation l io 5 l under a degraded mode permitted by LCO 4.2.10 and is reportable per Technical Specifi-l.

o is l cation AC 7.5.2(b)2. No affect on public health or safety. Similar occurrences re- l 0l7 l ported in RO 77-36, 78-12, 78-18, 78-37, 78-39, 79-01, 79-02, 79-24, and 79-30. l o18 l 80 7 8 9 SYSTEM CAUSE CAUSE COVP. VALVF CCDE CODE SU80CCE COMPONENT CODE SUSCCCE SUBOLDE 7

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33 34 35 36 31 40 41 42 u 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 1 0 Cause of first occurren ce wn_s eas4 8 t*1 m i e *n -a nnq,= ein g d ,n +n , , -a ,.4 n ,,e a -, a

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_ l 4 - --a , e n e 31 i i loass. Load was decreased to -ef,r da T rn 14 -4 *e - rn- neko- n c ~, -- o- - o e i 2 l core outlet temperature and/or moir ture levels were the cause of dnerndad ~nda neo-e-1 3 l tion. No specific corrective action was reauired. I i 4 l l 7 8 9 80 STA  % POWER OTHER STATUS dis O RY DISCOVERY DESCRIPTION 1 s lE l@ l 0l 3l 8l@l N/A l l A l@l Personnel Observation l ACTIVITY Co TENT AMOUNT OF ACTIVITY LOCATION OF RELEASE 7

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