05000318/LER-1980-054-03, /03L-0:on 801110,failure of SI-661-CV Caused 21A Safety Injection Tank Level to Decrease to Less than 187 Inches.Caused by Solenoid Valve 2-CV-661 Leak.Solenoid Valve (ASCO-NP8320A175V) Replaced W/Spare

/03L-0:on 801110,failure of SI-661-CV Caused 21A Safety Injection Tank Level to Decrease to Less than 187 Inches.Caused by Solenoid Valve 2-CV-661 Leak.Solenoid Valve (ASCO-NP8320A175V) Replaced W/Spare

ML19343B245
Person / Time
Site:	Calvert Cliffs
Issue date:	12/10/1980
From:	Rizzo P, Wenderlich R BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19343B244	List: 05000318/LER-1980-054, Forwards LER 80-054/03L-0 05000318/LER-1980-054-03, /03L-0:on 801110,failure of SI-661-CV Caused 21A Safety Injection Tank Level to Decrease to Less than 187 Inches.Caused by Solenoid Valve 2-CV-661 Leak.Solenoid Valve (ASCO-NP8320A175V) Replaced W/Spare
References
LER-80-054-03L-01, LER-80-54-3L-1, NUDOCS 8012160387
Download: ML19343B245 (1)

LER-1980-054, /03L-0:on 801110,failure of SI-661-CV Caused 21A Safety Injection Tank Level to Decrease to Less than 187 Inches.Caused by Solenoid Valve 2-CV-661 Leak.Solenoid Valve (ASCO-NP8320A175V) Replaced W/Spare

Event date:
Report date:
3181980054R03 - NRC Website

text

NRC FOIM 366 U. S. NUCLE A"1 f.EGULATCGY CoMMISSloN (7 77)

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60 Si ooCKET NuwgER 68 69 EVENT oATE 14 75 REcoRT oATE 80 EVENT oESCRIPT1oM AND PMo8ABLE CONSEQUENCES h to121l During nomal operation, at 2300, a failure of SI-661-CV (Safety Injec-I fB TT1 I tion leakoff return to RCDT) allowed level in 21A Safety Injection Tank i

mi to decrease to less than 187 inches, a degradation of the recuirements I

r3 pq i of T.S. 3.5.1.6.

The valve was repaired and tank level restored at 0230 g

io is l l on 11-11-80. The 3 iadundant Safety Injection Tanks remained operable.

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This event had no imoact upon the public health or safety. This is a i

io !a i i non-repetitive event.

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mi 2-CV-661 from shutting by maintaining air pressure to its actuator. The

'I g TT1 i SV (ASC0fMP8320A175V) was replaced in kind with a spare. This is the fi-st known failure in this service of a new, fully qualified SV after l

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