ML19289F129

LER 78-023/03L-0 on 780912:during Routine steady-state Operation,Spent Fuel Storage Ventilation Gaseous Radiation Monitor Failed Low.Caused by Shorted Local Alarm Horn Which Blew Power Supply Fuse.Horn Disconnected & Fuse Replaced

ML19289F129
Person / Time
Site:	Millstone
Issue date:	10/12/1978
From:	Crocker J NORTHEAST UTILITIES
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19289F123	List: ML19289F122 ML19289F129
References
LER-78-023-03L, LER-78-23-3L, NUDOCS 7906040307
Download: ML19289F129 (1)

Text

NRC FORM 366 ,

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S.U. S. NUCLEAR REGULATORY CoMMIS$10

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LICENSEE EVENT REPORT J control block: l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFoRMATIOPJ) 1 6 7

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7 8 60 COCKET NLM8ER EVENT QATE 74 75 DATE EVENT oESCRIPT1oN AND PROBABLE CONSEQUENCES h o 2 1 Durino routine steady state coeration. tbo snant mal e tnrwa ventilation cR< pons a 3 radiation monitor failed low. Grab samoles on a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> basis were initiated in the 1 o 4 l spent fuel pool area per action statement 14 of Technical Specification Table 3.1-6 I o 5 l Radiation monitor device: Mfr: Nuclear Measurements Coro. I o e l Model: APM-G25 Gas Monitor l' o 7 l 1 0 d l  !

7 8 9 80 SYSTEM CAUSE CAUSE COMP VA LV E CODE CCCE SUSCODE COMPON ENT CODE SUSCODE SU8 CODE 7

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43 44 47 CAUSE oESCRIPT1oN AND CORRECTIVE ACTIONS i o The. radiation monitor voltage was zero due to a blown power supolv fuse. The cause I i i lof the blown fuse was found to be a shorted local alarm horn. The horn was disconnoctoH

, , tand a new one ordered. The fuse was replaced, restorino the monitor to service. I i a l l i 4 I I 7 8 9 80 ST  % POWER OTHER STATUS DIS RY OISCOVERY DESCRIPTION i 5 lEl@ l0]9l0l@l NA l lAl@l Failure Alarm l ACTIVITY CO TENT RELE ASED OF RELEASE AMOUNT OF ACTIVITY LOCATION CP RELEASE i NA 7

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