ML20062F668

/03L-0 on 781117:while Reactor Was in Hot Shutdown Torus Level Increased .2 Above Tech Specs.Caused by Demineralized make-up Water Leakage Through Valves from RHR Keep-fill System Causing Torus Level to Rise

ML20062F668
Person / Time
Site:	Brunswick
Issue date:	12/13/1978
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:
Shared Package
ML20062F666	List: ML20062F664 ML20062F668
References
LER-78-082-03L, LER-78-82-3L, NUDOCS 7812200199
Download: ML20062F668 (2)

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P 8 60 61 DOCKET NuMGER 68 69 EVENT DATE REPORT DATE l EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h

[TTTI l On November 11, 1978 the reactor was in hot shutdown and RHR was in the l l

gj steam condensing mode of operation. At 0605 the B loop of RER was shut down. l At 0800 the torus level increased approximately.2" above the Technical g

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, o l Torus level was returned to normal in 3.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> (1112). RHR check valves l i , l Ell-F031 will not fullyseat on low differential pressures. Demineralized make-up l l

gl water leakage through the valves from the RHR keep-fill system tends to raise l l ;

gl torus level. Plant modifications77-255 ' (cont'd) l i 4 l 1 7 8 9 50 ST  % POWER OTHER STATUS OtSCO Y DISCOVERY DESCRIPTION lsl W Q l0l0l0l@l ' ' "

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LER CONTINUATION - RO# 2-78-82 Facility: BSEP Unit #2 Event Date November 11, 1978 cad 77-256 are designed to eliminate the torus level increases due to valve leakages. These modifications use water from the torus to keep safety cystem piping (RHR) pressurized. This will prevent any changes in torus level due to RHR check valve leakage. The modifications are almost complete cud should be operable by the end of the upcoming refueling outage.

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