ML19260D654

LER 80-006/03L-0:on 800103,while Performing Routine Surveillance Test,Control Element Assembly 60 Was Dropped Into Core.Cause Unknown.All Parameters Found Normal & No Problems Encountered.No Further Action Anticipated

ML19260D654
Person / Time
Site:	Calvert Cliffs
Issue date:	01/31/1980
From:	Bauer E, Davis S BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19260D646	List: ML19260D645 ML19260D654
References
LER-80-006-03L, LER-80-6-3L, NUDOCS 8002110546
Download: ML19260D654 (1)

Text

NRC "ORM 366 U. S. NUCLEAR REGULATORY COMMISSION (77 1 ,

• . LICENSEE EVENT REPORT (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

CONTROL SLOCK: l t

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7 o 1 8 3 l M lLICENSEE 0 l CCCOE l C l N14 l 115 l@l 0! 01 -luCENsE 0l 0l 0l010 l- 10 l250 @l411 NUMSER 26 l1 l1 l1 @l57 CAT 58l@

LICENSE TYPE JO l

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? 8 "fRU 60LLJ@l015101010131161 COCKET NUMBER I7 GIO IlEVENT 6d 69 10131810 oATE 14 Glo IlREPORT 75 la l1OATEl810dol@

EVENT DESCRIPTION AND PROBA8LE CONSECUENCES h o 2 l At 1755 while performing a routine surveillance test, Control Element  ;

o 3 l Assembly (CEA) 60 was dropped into the core. The CEA was withdrawn and i o 4 Ileveled with its group at 1845. All other CEA's remained operable during o s Ithe event. LER's 79-28 (U-2) and 78-48 (U-1) describe similar events. 1 0 6 l l' O 7 l l 0 8 l  !

• C$I'E TOo'E suSC$5E CeuPONENT CooE susS7[oE su"sE'oE 7

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_ sEQUENTI A L OCCURRENCE REPORT REVISION LER EVENT YE AR R EPORT NO. CODE TYPE NO.

O aeg/RO su 1810l l-l 101016l l/l 10 !3 l lL l-l 10 l 21 22 23 24 26 27 28 29 30 31 32 N AC C ONP T VE HOURS S8 i POR B. SUPPL E MANUPAC RER lZl@lZl@ Zl@ lZl@ l 01 0l 0l 01 W@ l42N l@ [N,j@ l44C 1419 l047l@

J3 34 35 36 37 40 el 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS li o l It is unknown what caused CEA 60 (U-1) to droo. Uoon the arrival of a I i i olant electrician a visicorder trace was taken of the sffected rod and i

, 2 l all carameters were found to be nonnal and no problems were encountered I i 3 1 durino the exercise of the Control rod. No further action is anticioated. I i 4 I l

• Eu? sPowER OTwf R status @ oisICoSS0v' oisCOvERv oEsCRiPnON @

1 5 LIJ@ 10 I 610 l@l NA l l A l@l Ooerator Observation l A IVITY CO TENT RELEASED OF RELEASE LOCATICN OF RELEASE 1 6 8 9 l Zl h I Z l@lf1 AMOUNTOF NA ACDVITY 44 l

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@ NAl l 7 to 30 PERsCNNEL EXPOSURE $

NUMSER TYPE DESCRIPTION 1 7 l Ol 01 Ol@l Zl@l NA l

,ERscNNE t ,Nau'4 Es NUM.ER =E CR,PT,0NO 4 i NA o4) - '? I 7 l 0] 0l Ol@l 3 l 7 9 9 11 12 SO t 9

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of CRIPTION 2 0 is ISSUEf81 NA l llll lll: Iili }

7 8 9 to 68 69 80 1 NAME OF PREPARER S. M. Davis /E. R. Bauer PHCNE: (3011269 4743/4729 y