05000317/LER-1982-077-03, /03L-0:on 821224,computer Failed,Rendering in-core Detector Monitoring Sys Inoperable.Caused by High Environ Temp in Computer Room Due to Improper Rotation of Air Conditioner Condenser Fan Motor.Computer Boot Strapped

/03L-0:on 821224,computer Failed,Rendering in-core Detector Monitoring Sys Inoperable.Caused by High Environ Temp in Computer Room Due to Improper Rotation of Air Conditioner Condenser Fan Motor.Computer Boot Strapped

ML20028F489
Person / Time
Site:	Calvert Cliffs
Issue date:	01/21/1983
From:	Lagiewski J, Raynor J BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20028F482	List: 05000317/LER-1982-077, Forwards LER 82-077/03L-0 05000317/LER-1982-077-03, /03L-0:on 821224,computer Failed,Rendering in-core Detector Monitoring Sys Inoperable.Caused by High Environ Temp in Computer Room Due to Improper Rotation of Air Conditioner Condenser Fan Motor.Computer Boot Strapped
References
LER-82-077-03L, LER-82-77-3L, NUDOCS 8302010389
Download: ML20028F489 (1)

LER-1982-077, /03L-0:on 821224,computer Failed,Rendering in-core Detector Monitoring Sys Inoperable.Caused by High Environ Temp in Computer Room Due to Improper Rotation of Air Conditioner Condenser Fan Motor.Computer Boot Strapped

Event date:
Report date:
3171982077R03 - NRC Website

text

NRC FORM 366 U. S. NUCLEA') REIULATORY COMMISSION (7-77)

LICENSEE EVENT REPORT o

CONTROL BLOCK: l l

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8 60 61 DOCK ET NUMBER 68 69 EVEN7 DATE 74 75 REPORT DA IE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lo l2l l At 1920, during normal operation, the plant computer failed renderine 1

[o i3; j the incore detector monitoring system inoperable (T.S. 3.3.3.2).

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[ o 14 l l Commenced reducing power to 98% per AOP-13 at 2035. The plant computer 1

io is] l was bootstrapped and returned to service at 2245. The excore detector l

l0 ln l l monitoring system remained operable during this event. Repetitive l

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events: 81-61 (U-1).

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8 9 SYSTEM

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10 11 12 13 18 19 20 SEQUENTI AL OCCUR R E NCE REPORT REVISION LE R HO EVENT YE AR REPORT NO.

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40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h [1 l0ll The cause for this event was the hinh environmental temperature in the 1

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computer room and its equipmenC. attributed to improper rotation of the l

,,,.,, j supplying (#12) air conditioning unit's condenser fan motor during test-l g,g3; l ing.

The computer was cooled down and bootstrapped. No further action l

gl 1s deemed necessary at this time.

l 80 7

8 9 STA S

% POWER OTHER STATUS ISCO RY O!SCOVERY DESCRIPTION NA l

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ACTIVITY CONTENT RELE ASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION oF RELEASE NA l

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8 9 10 11 44 45 80 FERSONNEL EXPOSURES NUMBER TYPE

DESCRIPTION

l 0 l 0 l 0 l@l Z l@l NA l

i 7 PE RSONNE L INJURIES NUMBE R DESCR:PTION NA l

l 0 l 0 l 0 l@l 1 R 7

8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE DE SCRIP TION NA l

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