05000265/LER-1979-030-03, /03L-0:on 791228,while Performing Surveillance Procedure Qos 30-2,bed Plate Drain Valve AO 2-4999-59 Failed to Close When Float Switch Was Activated.Caused by Component Failure.Corrective Maint Underway

/03L-0:on 791228,while Performing Surveillance Procedure Qos 30-2,bed Plate Drain Valve AO 2-4999-59 Failed to Close When Float Switch Was Activated.Caused by Component Failure.Corrective Maint Underway

ML19257C617
Person / Time
Site:	Quad Cities
Issue date:	01/21/1980
From:	Hannum D COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19257C610	List: 05000265/LER-1979-030, Forwards LER 79-030/03L-0 05000265/LER-1979-030-03, /03L-0:on 791228,while Performing Surveillance Procedure Qos 30-2,bed Plate Drain Valve AO 2-4999-59 Failed to Close When Float Switch Was Activated.Caused by Component Failure.Corrective Maint Underway
References
LER-79-030-03L-02, LER-79-30-3L-2, NUDOCS 8001290496
Download: ML19257C617 (1)

LER-1979-030, /03L-0:on 791228,while Performing Surveillance Procedure Qos 30-2,bed Plate Drain Valve AO 2-4999-59 Failed to Close When Float Switch Was Activated.Caused by Component Failure.Corrective Maint Underway

Event date:
Report date:
2651979030R03 - NRC Website

text

NRC FORM 366

.8. S. NUCLEAR REGULATORY COMMISSloN (7 77)

LICENSEE EVENT REPORT dJNTROC. BLOCK:

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l (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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60 61 DOCKET NUvaER 6a 63 EVENT DATE 74 75 REPOHT D ATE 80 EVENT DESCRIPTION AND PROBABLE CONSECuENCES h o

2 l While nerforming surveillance procedure Q05 30-2, RHR Service Water Vault Bed Plate l

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l Drain Check, bed plate drain valve A0 2-4999-59 failed to close when its float l

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i switch was activated as required by Technical Specification 3. 5. t A check valve, l

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l in addition to each air-operated valve, is installed in each bed plate drain line l

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I and would prevent any backflow from outside the vaults or from one vault to another l

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l in the event of a flood.

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CAUSE

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completed before unit start up.

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ACTIVI TY CONTENT RELEASED OF RELEASE AYOUNT OF ACTIVITY LOCATION CF RELEASE l Z l @ l Zlgl NA l

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7 8 9 10 11 44 45 80 PERSCNNEL EXPOSURES NLYRER TYPE DESCRIDTICN l 0l 0 l 0 l@l Z l@l NA l

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NAME OF PPEPARER PHONE-