ML19254E283

LER 79-072/03L-0:on 791003,main Steam Line High Radiation Instrument D12-RM-K603A Intermittently Spiked.Caused by Loose Condition of Voltage Cable,Resulting in Poor Contact. Connector Removed & Cleaned

ML19254E283
Person / Time
Site:	Brunswick
Issue date:	10/23/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19254E276	List: ML19254E275 ML19254E283
References
LER-79-072-03L-01, LER-79-72-3L-1, NUDOCS 7910310414
Download: ML19254E283 (1)

Text

NRC FORM 366 L; 3 NUCLE AR REGULATOR . COMMISSION (7 77)

LICENSEE EVENT REPORT CONTROL BLOCK:

1 l l l l 6

lh (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATION) lo Iil8 I9Ni clLICENSEE 7

ni el CODE v 11 @ l 01 01 -l 01 LICENSE 14 25 01 01 0 0 -l 01 250 @l NUMBER 26 4LICENSE 11 ilTYPE il il@l JO $ 7 L A T $8 CON'T l 7 l 9 l@ 75 l l 0REPORT l 2 Dl AT3E l 7 9l@

o i 3[,gC l L l@l 0 l 5 l 0 l - l 0 3 l2 l5 l@! 1 l 0EVENTl 0 l3 74 80 7 8 60 61 DOCKET NUMBER 68 6'J D ATE EVENT DESCRIPTION AND PROB A9LE CONSEQUENCES h

[M 2_j l Durinn normal operation. a half scram and half nroup one isolation was received on 1 o a l enannel A. Main steam line high radiation instriraent, D12-RM-K603A, was found to be 1 0 4 intermittenly spiking. The instrument was placed in the standhv mode and a half I o 5 lscram was incerted. I o 6 Technical Specifications 3.3.2. 6.9.1.9b _

l O 7 l l 0 81 l l SYSTEV CAUSE CAUSE C OY P. VALVE CODE CPcF SUBCODE COMPONENT CODE SU8 CODE SUBCODE o 9: 11 9

A l@ tg_j@ l a l @ le It is Ic lo IN lh lZlh W h 13 12 13 18 19 20 7 8 11 SEQUENTI AL OCCUARENCE REPORT RLVISION LE R RO _ EVENT YE 'R RE POR T NO. CODE TYPE N O.

@ AggRT l7 9l l-l l0 l7 l2 l l/ 0l3l l L ,'

30 l-j l 0l 31

_ 21 22 23 24 26 27 28 29 31 ACTION FUTURE EFFECT SHUTDOWN A TT AF HV E N T N PR D.4 PRIVE COYP. COYPONENT TAKEN ACTION ON PLANT METHOD HOURS 22 SUBVITTED FORMbCB. SUPPLI E R MANUFACTURER 33 Bl@l34 Z lh 3d Z

l@ lZ 36 l@ 3/

0 l0 l0 l j 40 l NlQ 41 l Ylg l Nlg l A 3[ 8l 0lg 42 43 44 47 CAUSE DESCM 8 TION AND CORRECTIVE ACTIONS i o l The cong etor on the high voltace cable was loose and not making good contact. The l i i l connector was removed, ,abic and connector parts were cleaned, and the connector was l li[7] l reinstalled and tightened fm c good connection. The cable was reconnected to the  ;

i 3 l instrument and the reading was stable. Visually inspected all other main steam line l l i 14 I l drawers for proper connections. This is considered an isolated event.

7 8 9 80 F ACIllTY , YETHOD OF STATUS  % POV.E R OTHER STATUS DISCOVE R Y C,lSCOVE R Y DESCRIPTION 32 i 5 LE]@ l 0l 9l 6l@ NA l l Al@l Operator Surveillance l ACTIVITY LO TENT RELE ASE D OF RE LE ASE AVOUNT OF ACTIVITY LOC ATION OF RELE ASE i 6 l Zl NA l NA l 7 8 9 60 11 44 45 60 PE RSONNE L E X PO*;URLS N' iVH E R TYPE DESCRIPTION i 7 101 Ol 01@l Zi@lNA I PERSONN e't iN iu' RIES Nuvst n nESCRipuON@

i I 1

a 8 9 10 01 Ol@lNA 11 12 80 LOSS OF OR D AMAGE TO F ACILt TY O

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TYPE DESCRIPTION 7 910010LtI q g <l -

l i l o8l 9I Z i@l 10NA 80 7 t q I

2 O ISSUENA@l DESCRIPTION llll Ulllllll 7 8 9 10 68 69 80 S

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N Avr or rocoanro __A_ c_ Tolli son . Tr. no n..e 919-457-9_521