ML20023C469

LER 83-017/03L-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

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: ML20023C466 ML20023C469
References
LER-83-017-03L, LER-83-17-3L, NUDOCS 8305170358
Download: ML20023C469 (1)

Text

. .

u s. muet.aa a.outavoav commission *****v808'o"*

==ccon=s.s 8'*" UCENSEE EVENT REPORT .' 2pin N'a s e .a l iPLE ASE PRINT OR TYPE ALL REQUIREO INFORMATION)

CCNTROL SLOCK. l t l l l 1 Q) l 0l1..l lN iC l M tG IS l 1 !@l 0!0 l- 10l uc.-....... ,. ..

010 l 0l 0l- l 010l@l me.... ,o.... o u 4 luc.1 !1 I 1 l n1 !@l

...... l l@

.,c.,..

CON'T l o l1 l ",'!n W@l 0 l 5 l 0l 0 l 0 l 3 l 619 l@l 0l 4 ... l 0 lr.A1.

5 l8 l 3 l@l 0l 5l 0 l 5l 8l 3u l@

...,-,=.v.

, . .. .. .....,,o-... .. .. 1.

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': v. .:m:. .. .. ..,.... .::::.. .:m:.

10191

l. Cl Fl @ W @ bl

.. ,, n @ lI nlN I S lT IR l U l @ d.. @a d @ ..

...~,,o. J#::,"!.'. ***""":"** 'MU' " "':'* "

@ Ed,*.""', I 81 al l--J l 01 Il 7 I l/_J u

lo o

i1ln l Ll l-l LOJ n

u o ..

.::::::,w..@

=:~ =:: ::::::, = = ~ ....

@ :=~,~,

[ X,j@l c l@ Iz l@ [,,2J @ 101 01 0101 l NI @ .:::r:. ~;::.= -W@lZ d@ a 191919 al n n n u .. a n n n CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h

!1?o!lThe reactor vessel level nauce beine used to provide an indication that the l l 1 l 1 l l level was approachine the vessel flance level had been isolated (recctor cool-l I

lt!2il ant drain tank isolation vnivo had been closed durine nn attomt en vnduco 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 r30vig,gg,..ggd mescow sv personnelos. counseled.

cow.sv o.scasettom s,Arus  % pow.m ofw.m status I t l sj W @ l 01 Ol 0 l@l N/A u

llA a l@la Control board indications

=

I

, .. .. n n LOC ATION OP m.b. A g.

W.6 S.O A . . AMOWNT OP AC?ty TV N/A l l N/A l Pfal..l 2 l @ L. 2J@l

, n a a n

=::~ ~;::: ~.......,,. @

N/A l l 1 I 7 l l 0 l Ol Ol@(, Zj@l "

, . . n n n M M.4 . R I PTIO N N/A l l 1 ! a l l0 l0l0l@l n n LOS. OP 09 S AM AG. 90 P A C,L!? V N/A i l 119.! .l Z l@l NaC USE ONLY is v..""U' c'n i,via.@

12 ! o l ! N !@l M/A l lll1llllllll l ..

NAME OF PREPARER Phillip B. Nardoci awoNE. (704) 373-7432 l 8305170358 830505 PDR ADOCK 05000369 S PDR