05000336/LER-1978-023-03, /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

/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: 05000336/LER-1978-023, Forwards LER 78-023/03L-0 05000336/LER-1978-023-03, /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
References
LER-78-023-03L, LER-78-23-3L, NUDOCS 7906040307
Download: ML19289F129 (1)

LER-1978-023, /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

Event date:
Report date:
3361978023R03 - NRC Website

text

S.U. S. NUCLEAR REGULATORY CoMMIS$10 NRC FORM 366 am.

4 LICENSEE EVENT REPORT J

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8 60 61 COCKET NLM8ER 68 69 EVENT QATE 74 75 REPORT DATE 80 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

l spent fuel pool area per action statement 14 of Technical Specification Table 3.1-6 I

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l Radiation monitor device: Mfr: Nuclear Measurements Coro.

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Model: APM-G25 Gas Monitor l'

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33 35 36 37 40 41 42 43 44 47 CAUSE oESCRIPT1oN AND CORRECTIVE ACTIONS The. radiation monitor voltage was zero due to a blown power supolv fuse.

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The horn was disconnoctoH i

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The fuse was replaced, restorino the monitor to service.

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