ML19323A510

LER 80-013/03L-0:on 800313,while Performing Surveillance Test 8.M.1-5,found Pressure Switch 503D Setpoint Drifted. Cause Not Stated.Drift Is Recurring Problem

ML19323A510
Person / Time
Site:	Pilgrim
Issue date:	04/11/1980
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19323A508	List: ML19323A507 ML19323A510
References
LER-80-013-03L, LER-80-13-3L, NUDOCS 8004210292
Download: ML19323A510 (1)

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IRC FORM 366 U. S. NUCLEAR HEGULAT'OliY COMstlSSION 7 77)

LICENSEE EVENT REPORT l l l l l ] (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O l 21 ] On March 13, 1980 while performing surveillance test number 8.M 1-5 ft was de- 1 termined that Pressure Switch 503D setpoint had drif ted. The pressure switch is I O la l l o l4 l l a condenser low vacuum switch in the RPS System. The pressure svitch tripped at I 292 inches H 20. The minimum trip point is 313.3 inches H 7 0. The pressure switch I oisl l was recalibrated to a setpoint of 339 inches H 3 0 and returned to service. I lO ls ] l i

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l i l 41 1 80 7 8 9 STA S  % POWE R OTHER STATUS IS O FY DISCOVERY OESCRIPTION Ii 15 l W@ l0 l0 l0 ]@l N.A. l lB l@l Routine Testing l ACTIVITY C TENT RELEASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE i e n.A. I I N.A. I-7 8 9 Lz_l @ Lz_1@l 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE l

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7 8 9 11 LOSS OF OR DAMAGE TO FACILITV TYPE DESCRIPTION i 9 N.A. l

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