05000267/LER-1981-027-03, /03L-0:during 810413-25,plant Operated in Degraded Mode of Limiting Conditions of Operation 4.2.10 on Five Occasions.Caused by Circulator Trips Increasing Temp Resulting in Core Offgassing

/03L-0:during 810413-25,plant Operated in Degraded Mode of Limiting Conditions of Operation 4.2.10 on Five Occasions.Caused by Circulator Trips Increasing Temp Resulting in Core Offgassing

ML19352B152
Person / Time
Site:	Fort Saint Vrain
Issue date:	05/13/1981
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19352B150	List: 05000267/LER-1981-027, Forwards LER 81-027/03L-0.Detailed Event Analysis Encl 05000267/LER-1981-027-03, /03L-0:during 810413-25,plant Operated in Degraded Mode of Limiting Conditions of Operation 4.2.10 on Five Occasions.Caused by Circulator Trips Increasing Temp Resulting in Core Offgassing
References
LER-81-027-03L, LER-81-27-3L, NUDOCS 8106030226
Download: ML19352B152 (1)

LER-1981-027, /03L-0:during 810413-25,plant Operated in Degraded Mode of Limiting Conditions of Operation 4.2.10 on Five Occasions.Caused by Circulator Trips Increasing Temp Resulting in Core Offgassing

Event date:
Report date:
2671981027R03 - NRC Website

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LICENSEE EVENT REPORT Il cONTZL BLOCK: l l

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, si coCusTNuwesR EVENT DESCRIPTION AND PROCABLE CONSEQUENMS h 10121 [ Between April 12 and 25.1981. the olant was ooerated in a denraded mode of I

g l LCO 4.2.10 on five separate occasions.

These__ events 'are reportable per Fort St. Vrainj A l Technical Specification AC 7.5.2(b)2.

There are no probable consequences. There was i t o i s i l no affect on p'Alic health or safety.

Related reports are RO's 77-36, 78-12, 78-18, I g ] 78-37, 78-39, 79-01, 79-02, 79-2 4, 79-30, 79-45, 79-53, 80-11, 80-19, 80-22, 80-2 5, I

I l o 1 i l l 80-36, 80-59, 80-66, 80-75,81-009, 81-015, and 81-020.

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Izi91919E 33 34 35 46 31 4o 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h g l The increased primary coolant oxidants are being attributed to the of f-gassing from l

I g l the core, due to increased temperatures and moisture ingressed due to several cireu-l lator trips. Normal purification system operation reduced the level of oxidants and I i,i3i l several scrams terminated these events.

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