05000324/LER-1981-078-03, /03L-0:on 810804,RHR SW Subystem Pump a Would Not Start Due to Pump Suction Header Low Pressure Lockout Signal from Header Pressure Switch.Caused by Loose Plug in Switch Diaphragm Housing,Allowing Diaphragm Fluid to Leak

/03L-0:on 810804,RHR SW Subystem Pump a Would Not Start Due to Pump Suction Header Low Pressure Lockout Signal from Header Pressure Switch.Caused by Loose Plug in Switch Diaphragm Housing,Allowing Diaphragm Fluid to Leak

ML20010F082
Person / Time
Site:	Brunswick
Issue date:	08/31/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010F077	List: 05000324/LER-1981-078, Forwards LER 81-078/03L-0 05000324/LER-1981-078-03, /03L-0:on 810804,RHR SW Subystem Pump a Would Not Start Due to Pump Suction Header Low Pressure Lockout Signal from Header Pressure Switch.Caused by Loose Plug in Switch Diaphragm Housing,Allowing Diaphragm Fluid to Leak
References
LER-81-078-03L, LER-81-78-3L, NUDOCS 8109090344
Download: ML20010F082 (1)

LER-1981-078, /03L-0:on 810804,RHR SW Subystem Pump a Would Not Start Due to Pump Suction Header Low Pressure Lockout Signal from Header Pressure Switch.Caused by Loose Plug in Switch Diaphragm Housing,Allowing Diaphragm Fluid to Leak

Event date:
Report date:
3241981078R03 - NRC Website

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NRC FOR3 384 U. S. NUCLEAR REGULATORY COMMISSION

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6 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lDuring a scram recovery when an attempt was made to place the "A" RHR SW subsystem intol o 2 go g3; [ service for use la suppression pool cooling, the subsystems' pumps could not be started; l

j g g ldue to a pump suction header low pressure lockout signal from the header pressure l

[ g l switch, 2-SW-PS-il75, Model No. D2T-M130-SS, despite a normal suction header pressure. l lolol lThe "B" RdR SW subsystem was utilized for suppression pool cooling and the plant was ing

j o l 7 ] l cold shutdown within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. This event did not affect the health and l ings,l safety of the public. Technical Specifications 3.7.1.1, 6.9.1.9b l

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4r 41 42 43 44 47 CAUSE DLSCRIPTION AND CORRECTIVE ACTIONS h g irhe threaded plug in the swa v.h diapnr m tousing became loose and allowed the diaphragm l l fluid to leak out and caused the switch to sense a low pressure.

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i i g grefilled, the plug rein ;talled and the housing was checked for leaks with none found.

l lThe other RilR SW suction header pressure switches were checked with no problems found. l

, 3 l Plant documentation shows *chis event is isolated; therefore. no further corrective I

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