ML19225A846

LER 79-024/03L-0 on 790704:during Performance of Surveillance Testing,Control Element Assembly 2 Dropped to Core Bottom.Caused by Spike in 15 Volt Power Supply.Dual Power Supplies Will Be Installed Next Refueling Outage

ML19225A846
Person / Time
Site:	Calvert Cliffs
Issue date:	07/16/1979
From:	Lagiewski J BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19225A845	List: ML19225A844 ML19225A846
References
LER-79-024-03L, LER-79-24-3L, NUDOCS 7907200415
Download: ML19225A846 (1)

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EVENT DESCRtPTICN ANC P908 *BLE CONSECUENCES h a , l Curino perfor ance cf surveillance 5stina CEA-2 drooned to the bottcm of the j

,o , , core at 0145. Per the requi rerents of T.S.3.1.3.1.f, reactor cover was reduced l o ,ji to 6 70% at 0243. At 0307 CEA-2 was restored to alianment aith other CEA's of l I

o 3 i its arcue. LER's 79-12 (U-2) and 78-48 (U-1) describe similar events. I O 6 l l 0l'll l o18 l _l 7 8 9 0 SYSTEV C A USE CAUSE COY 8 s ALs E CCOE COCE SL8CCCE CCVPONENT C00E 5,,,8 C O C E SceCCCE ois I R

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, , i dual pcwer sucolis (FCR 78-72) is to be installed durina the next refuelino I i i3i loutace. l i Al l I 4 3 30 F ACitiTv ,s YE TwCD CF S T A T .,5 %3CWEA OT-E A STA TUS 0'3COVEdv O ' S C C '. E 4 Y C E 5 C M P Y ' O N J.

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