05000318/LER-1981-026-03, Discharge Damper to ECCS Pump Room Exhaust Fan 22 Failed Shut.Caused by Linkage Rod Shifting from Proper Position.Linkage Repaired & Adjusted. Preventive Maint Procedure to Be Instituted

Discharge Damper to ECCS Pump Room Exhaust Fan 22 Failed Shut.Caused by Linkage Rod Shifting from Proper Position.Linkage Repaired & Adjusted. Preventive Maint Procedure to Be Instituted

ML20009A561
Person / Time
Site:	Calvert Cliffs
Issue date:	06/30/1981
From:	Rayburn C BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20009A558	List: 05000318/LER-1981-026, Forwards Updated LER 81-026/03X-1 05000318/LER-1981-026-03, Discharge Damper to ECCS Pump Room Exhaust Fan 22 Failed Shut.Caused by Linkage Rod Shifting from Proper Position.Linkage Repaired & Adjusted. Preventive Maint Procedure to Be Instituted
References
LER-81-026-03X, LER-81-26-3X, NUDOCS 8107130314
Download: ML20009A561 (1)

LER-1981-026, Discharge Damper to ECCS Pump Room Exhaust Fan 22 Failed Shut.Caused by Linkage Rod Shifting from Proper Position.Linkage Repaired & Adjusted. Preventive Maint Procedure to Be Instituted

Event date:
Report date:
3181981026R03 - NRC Website

text

NRC FORM 366 U.@. NUCLEAR R3GULAT@RY COMMi@llISS (7 77)

N LICENSEE EVENT REPORT UPDATE REPORT PREVIOUS REPORT DATE: 05-29-81 CONTROL BLOCX: l l

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l l lh (PLEASE PRINT OR TYPE ALL REQUIRED 1RFORMATION) 1 6

lO lil l M I D l C l C l N l 2 l@l 010 I-101010 l Ol Ol l Ol Ol @ [4 11 Il 11 l1 l @l I

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7 8 9 LICENSEE CODE 14 15 UCENSE NUMBER 26 26 LICENSE TYPE JO 5 7 CA T $8 CON'T 10111 l L l@l 015101010131118 l@l 01510121811 l@l016 l3 l0 l R 11 l@

SOuRC 7

8 60 61 GCCKET NUMBER 68 69 EVENT DATE 74 75 REPORT D ATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h f

iO i2I I At 1109 during nonnal operation, the rounds man discovered the linkage I

iO i3 i ;

for the discharge damper to 22 ECCS pump room exhaust fan needed adjust-l l 014 l l ment. The linkage caused the damper to fail shut rendering the fan in-I io isi I operable (T.S. 3.7.7.1).

The damper was repaired and the fan was re-l iO i6 ; l turned to service at 1400 on 05-04-81. The redundant fan remained oper-l l O 17 l l able during the event.

Similar events

None.

l I O I8 l l

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CODE S PC E COMPONENT CODE SLBCODE S

E 10191 l Al A l@ lE l@ lB l@ l VI Al Ll VI El Xl@ lN l@ lG l@

7 8

9 10 11 12 13 IS 19 20 SEQUENTIAL OCCURRENCE REPOr4T REVISION

,,_ EVENT YEAR REPORT NO.

CODE TYPE N O.

@,a'E R ROl 81 1_l l-l l Ol 2i 6l l/l l013l lx I l-l L1_J L

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.2 23 24 26 27 28 29 30 31 32 T K f AC ON ON PL NT E

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33 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS li tol l Investigation showed that the linkaae rod had shifted from its orocer I

li lii l cosition.

The linkage was repaired and adiusted to oeerate the damnar I

iii2i l properly.

A Surveillance Test Procedure exists for verification of I

li t ai l the damoer's operability and a Preventive Maintenance Procedure to main-ii 14i i tain the linkage will be instituted.

I 80 7

8 9 ST S

% POWER OTHER STATUS ISCO RY DISCOVERY DESCRIPTION Ii I5 l l E l@ l 110l Ol@l NA l

l A l@l Operator Observation I

ACTIVITY CO TENT RELEASEO OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE li 161 Lz_J @ Lz_J@l NA l

l NA l

7 8 9 10 11 44 45 60 PERSONNEL EXPOSURES l

NUMBER TYPE DESCRIPTION 39 l Li_]_7_j l010l0l@lZl@l NA l

2 PERSONNE L iN,u' RIES NUVBER

DESCRIPTION

12 lal10l010l@l NA l

80 7

8 9 11 12 M'E STO%'N L'_LoJ l z l@l NA l

L2_utj l N [@DESCRiPTiONO O

NRC USE NLY isuE l

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68 69 80 5 I 7 8 3 10 l

C. L. Rayburn (301) 269-4803 c

l NAYE OF PREPARER PHONE: