ML20023B648

LER 83-032/03L-0:on 830331,detection Zone Nnn in Control Bldg Failed to Respond to Simulated Smoke Condition During Investigation of Alarm.Alarm Previously Received on 830329. Caused by Short in Smoke Detector.Detector Reinstalled

ML20023B648
Person / Time
Site:	Summer
Issue date:	04/29/1983
From:	Mckinney C SOUTH CAROLINA ELECTRIC & GAS CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20023B644	List: ML20023B642 ML20023B648
References
LER-83-032-03L, LER-83-32-3L, NUDOCS 8305050239
Download: ML20023B648 (1)

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EVENT OESCRIPTION AND PROBABLE CONSEQUENCES h j o l2 I lOn March 29. 1983, with the Plant in Mode 5, a trouble alarm was received from Fire l 1 o l3 l l Detection Zone NNN in the Control Building (Elev. 482') . Operations personnel l l o l4 l l investigating the alarm on March 31, 1983, discovered that the zone would not l l o ls l l respond to a sinulated smoke condition. Typically, trcuble alanns are not alarm l l0lslllimiting. 'Ihe ma%r equipment in the "one was protected during the inoperable l l g g , l ; period by an independently operating deluge sprinkler system. 'Ihe potential did g

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H ] @ W@ lP l4I315 ol n u . n n .. u a u u CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h ,

l 1 l 0 l l An hmirly firn watch natrol was enrahli nhod within nno hmir. A short had ocnirred I l111 l lan a rann1r nf a mmnka aproctnr hona nnt hoing fullv inckna intn the base annothlv. l l i l 2 l lThe detector was properly installed in the base assenbly, and the zone returned to l l i l 3 l [ operable status on March 31, 1983. Guidelines will be developed to provide l l s l 4 l Idirection for the tineiy identification and resolution of fire detector prchlem. l

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