05000369/LER-1983-017-03, /03L-0:on 830405,during Draining of Refueling Cavity RHR (Nd) Pumps Began to Cavitate & Eventually Both Nd Pumps Stopped.Caused by Level Gauge Isolation.Cavity Refilled.Nd Sys Vented.Procedures Revised

/03L-0:on 830405,during Draining of Refueling Cavity RHR (Nd) Pumps Began to Cavitate & Eventually Both Nd Pumps Stopped.Caused by Level Gauge Isolation.Cavity Refilled.Nd Sys Vented.Procedures Revised

ML20023C469
Person / Time
Site:	McGuire
Issue date:	05/05/1983
From:	Nardoci P DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20023C467	List: 05000369/LER-1983-017, Forwards LER 83-017/03L-0 05000369/LER-1983-017-03, /03L-0:on 830405,during Draining of Refueling Cavity RHR (Nd) Pumps Began to Cavitate & Eventually Both Nd Pumps Stopped.Caused by Level Gauge Isolation.Cavity Refilled.Nd Sys Vented.Procedures Revised
References
LER-83-017-03L, LER-83-17-3L, NUDOCS 8305170358
Download: ML20023C469 (1)

LER-1983-017, /03L-0:on 830405,during Draining of Refueling Cavity RHR (Nd) Pumps Began to Cavitate & Eventually Both Nd Pumps Stopped.Caused by Level Gauge Isolation.Cavity Refilled.Nd Sys Vented.Procedures Revised

Event date:
Report date:
3691983017R03 - NRC Website

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u EVENT OESCRIPTION AND PROS A8LE CONSEQUENCES h l o i: l lIn mode 6, while the Unit I refueline cavity was beine drained so that the

,o;j-l reactor vessel head could be placed in position, the residual heat removal (ND)

! o '4 ! ' pumps began to cavitate and eventually both ND pumps were stopped.

This vio-jajslllates T.S.3.9.8.2 which is reportable per T.S.6.9.1.ll(b). With the ND system i j o,.3 l l inoperable reactor coolant ' loop average temp. increased 28 degrees. This increhe j3j,ilwas not detrimental since the chemical and volume control system was availableI lo.s lto provide cool makeup water. Health and safety of the nublic were unaffected.l m':

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!1?o!lThe reactor vessel level nauce beine used to provide an indication that the l

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l i j a l l leakage into the RCDT). Additionally. nrocedures did not require visual monitorf-l t i 4 l ling of cavity level. The cavity was rnfilind, the ND system vented and declared a,,* oy,e rab le. Procedures will be r vig,gg,..ggd personnel counseled.

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