ML20024B709

Updated LER 83-054/03L-1:on 830601,power Failure Occurred, Defeating One Gpm Leakage Alarm for Reactor Bldg Sump.Caused by Loose Power Supply Module Fuse Holder Grounding Power Supply.Module replaced.W/830706 Ltr

ML20024B709
Person / Time
Site:	Summer
Issue date:	07/06/1983
From:	Bouknight R, Dixon O SOUTH CAROLINA ELECTRIC & GAS CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-83-054-03L, LER-83-54-3L, NUDOCS 8307110262
Download: ML20024B709 (2)

Text

"

ancroa= ...

UPDATE REPORT-PREVIGUS REPORT DATS 06-03-83

"*" v.s. aucLema acovuaroav cow ission a *a o w .o a v o==

3 LICENSEE EVENT REPORT [':,*[:I' '... . .

f . ** 'iCNTROLBLOOK;l l l l l l l 17 LEASE PRINT OR TYPE ALL REcutREO INFORMATION) joi,jjSjcjV;C;S;l

, . . ..u .......

g 0l0; ;0;0;0;0;0,e ; 0, 0

.. .. s... ... ....

4 1 0 0 0

.. .. 6,u ... ,,.. .. , , . . , . .

CONT b

l c 11 l

"!'!"; I l 6. 0 l 5 .mu., 01010l w-...

3! 9l 5lgl 016l 0l 1l 8l 3lgl 0l7 l 0; 6l 8l 3jg

.. .. ....,..v. ,. ,. .....,..,. ..

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h1o l c 12 l ion June 1,1983, with the Plant in bbde 1, the Ihlance of Plant Auxiliary Relay ]

l o la j l Rack, XPN-6034, was declared inoperable due to power failure, thus' defeating l l o 14 l l the one GPM leakage alarm for the Reactor Building Stmp. Technical Specification l l o is l l 3.4.6.1 requires the Reactor Coolant System leakage detection system be operable in g I c i s l l Modes 1, 2, 3, and 4. There were no adverse consaquences due to this event. The l

l c l3 l l Reactor Btillding (RB) atmosphere particulate radioactivity monitoring system and g g the RB cooling unit drain flow indicator were operable.

' "I *." " 's ".*/ . * *# * . ........,.... . . " . . " . . ..;t m .

j e g, j l ClI l @ l El @ l A l g l Il N ; S j T l R l U g g l P;g lZgg

, . . .. ,, .. n .. .. ..

... ,.... " "I,"!.'.'.' *"":::"" "r'Lt"' ";f.

@ [h,"",, I8 , 3l l_ l l 0j5l 4l l,-l [dl3l l j l __ l l l

.v u u .. .. v u n n ,, n

==  ::= = ..... == .-

.= m .. v

[C lgl Zlg lZjg lu Zl@ l0;0;Og;jjY;g .:::d:;.g y 'U; r-g l $:;:2 ;"I=;..pl n n n o .. ., ., .. ~ ,,

CAUSE DESCRIPTION AND CORRECT!VJ ACTIONS 27 l3i: ljThe cause of the power failure wa ue to the fuse holder on the power supply j3j, ; l module being loose and grounding the power supply. The power supply module was

3,.,

replaced, the unit tested, and declared operable June 1, 1983. No additional

,icorrective action is planned other than required surveillance testing.

isi4 r: l

[.',*.',I.'  % .r... e,=...,A,w.

h U.'c".[. . ," .i.e.vc.,...c...,,.= g.

liisllE ;gl0l7l5lg! N/A l f lgl OPERA'IOR OBSERVATION  ;

, .. .. n n - n .

ggg agg ..g . A s. . w N, . . A CTiVf rY L.C .v i.h .P .gggggg

,,,)lZlglZjgl N/A l l N/A g

, .. i. .. - .. ..

' *:.'::" " ",, :." * " . . . e . .., .. @

0 N/A isiviI 10 1 Onl @l n Z l @l n g

• m . .sen .L a m J u s t. .

O'0 1 0lg; N/A

{siell i

ii .. -

g

l"..*'***'."'c***.'*.'"@ / '

IiIe1 l b @!"l N/A k' l 8307110262 830706 "

, .'. . . P "s '.'c'. . . . . - @ PDR ADOCK 05000395 NRc uSE ONts S PDR j l;} j ; ;;;;;;l l

-. . i 3'a _ ,

, ., c et e r t o r m e n < -< <~ - p-: .t (803) 345-5209 i R. Ed. Bouknight(/ -_-

s -<U p NRO p# -

SOUTH CAROLINA ELECTRIC 86 GAS CCiMP,ANY POST OFFICE 764 J hfjQ CoLuMeiA. Sout%QAROLINA 29218 o.w.oixon.an.

JJUL 8 v!ce *R.Sio ar July 6, 1983 4 S .' $3 NUCLEAR OPERAflONS Mr. James P. O'Reilly Regional Administrator U. S. Nuclear Regulatory Commission Region II, Suite 2900 101 Marietta Street, N.W.

Atlanta, Georgia 30303

Subject:

Virgil C. Summer Nuclear Station Docket No. 50/395 Operating License No. NPF-12 Thirty Day Written Report LER 83-054, Revision 1

Dear Mr. O'Reilly:

Please find attached Licensee Event Report #83-054, Revision 1, for Virgil C. Summer Nuclear Station. This Thirty Day Report is required by Technical Specification 6.9.1.13.(b) as a result of entry into Action Statement (a) of Technical Specification 3.4.6.1, " Reactor Coolant System Leakage Detection System," on June 1, 1983. This revision is submitted to correct a typographical error.

Should there be any questions, please call us at your convenience.

Very truly yours, O. W. Q xon, Jr.

RJB:OWD/1kh

! Attachment

! cc: V. C. Summer D. A. Lavigne E. H. Crews, Jr. C. L. Ligon (NSRC)

T. C. Nichols, Jr.,/ G. J. Braddick O. W. Dixon, Jr. J. C. Miller E. C. Roberts J. L. Skolds l

H. N. Cyrus J. B. Knotts, Jr.

Group / General Managers I&E (Washington)

O. S. Bradham Document Management Branch R. B. Clary INPO Records Center

! C. A. Price NPCF A. R. Koon File 1

esw' c -

^

gr nll l