ML19209B975

LER 79-068/01T-0:on 790927,cables for HPCI Inboard Isolation Valve G41-F002 Discovered in Sections of Cable Tray W/Automatic Depressurization Sys Cables.Cause Not Stated. Mods Being Prepared

ML19209B975
Person / Time
Site:	Brunswick
Issue date:	10/09/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19209B974	List: ML19209B973 ML19209B975
References
LER-79-068-01T, LER-79-68-1T, NUDOCS 7910110338
Download: ML19209B975 (2)

Text

{{#Wiki_filter:. . .. ,. (777) LICENSEE EVENT REPORT CONTROL BLOCK: l 1 l l l l l lh 6 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 7 o 1 8 9 lN lCLICENSEE lB lECODE lP l1 [@15l 0l 0l -l 0UCENSE NUMHLH 14 0 0 0 0 -l 0l 0l@[ 25 26 4l 1l 1l 1 1l@l$1 CAT $8l@ LICENSE T)PE Jo CON'T o i 8 [n"c' l X}@l 0l 5 0]-l0l3l2l5@l0 9l 2 7l 7] 9l@ 60 61 M 69 EVENT DATE 24 1 75 0 0 l9 REPORT DATE 7 l9 @ 80 1 OOCKET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 lDuring a review of ECCS division separation, it was determined that Division TI cables l o a i for the llPCI inbcard isolation valve (C41-F002), a Division II valve, was run in sec- l o 4 ltions of cable tray containing Division II ADS system cables. Subsequent analysis of l o s [those cables revealed that if the isolation valve was in the wrong position, then a l o s failure at a trav section containing thes'e cables might result in a cou sinatien of

                                                                                     '

al 0 7 l cable failures which could impair the operability of the HPCI (Division 1) and ADS l o s l(Division II) systems. This is common to both units. Technical Specifications 6.9.1.$1 SYSTEM CAUSE C A US E C O .' P. VALVE CODE COGE SUBCODE COVPONENT CODE SU8 CODE SUECODE o 9 lS lF lh lB h Wh l E l Ll E l C l 0l N l@ l Z l@ y @ 20 F 8 9 10 11 12 13 16 19

                                    ,_                                           SEGUENTI AL                       OCCURRENCE               REFORT                       REVISION LER RO      EVENT YEAR                                R EPOHT NO.                           CODE                    TYPE                          N O.

O RgP RT l7l9 l-l l 0l 6l 8l 24

                                                                                                       ]/l          l0l1                     lT                l-              0l

_ 21 22 23 26 21 28 29 JJ 31 32 TAKEN ACTO CN PL AP T P TH HOURS S 8 IT D F R UB 5 P LI E MAP FACT RER lF 33 lglJ4X@ l Z lg 35 lJo Zl@ l0l0l0l0l 3/ 40 [ YlQ 41 l Y lg Nlg lG l0 8 l 0lg 42 43 44 41 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i o l United Engineers and Constructors is preparing plant modifications to " spare" cables l LLL'_J land install new cables in isolated conduit to provide sufficient isolation. A review i 7 jof ECCS and their primary containment isolation valves in being performed to verify i 3 that no other cable separation problems existed. The cable seperation criterion for l i . the IIPCI and ADS systems will be redefined in the appropriate cabic seperation (CON'T} 7 8 9 80 ST $  % PO.'.E R OTHER STATUS D50 Y DISCOVE HY DESCR.PTION i 5 W@ l 0l 9l 1l@l NA l l D l@l NSSS Notification l ACTIVITY LO TENT RE LE ASE D OF RELE ASE AVOUNT CF ACTIVITY LOCAT'ON OF RELEASE 6 lNA 7 1 8 9 Z l @ l10Zl@l NA 11 44 45 80 l PERSO*.NE L E XPOSun ES NUMBE R TYPE DESCRIPTION 37 i 7 l 0 l 0 l 0 l@l Z l@l NA l PERSONNEL NJU ES NUYRER CESCH.P TION i a 8 9 l 0 l 0 l 0 l@l NA go 1 11 12 LOSS OF OR D AV AGE TO FACILITY TYPE D;SC RIP TION 9 8 9 W@l NA to 7 60 ISSUE 910110 3 2, > ' Nw m mn ll[[lllllllllj

                                                                                                                                                                                           ,

12 l 8c9l l N f@l DESCRIPTION NA l 1 10 68 69 80 ;s NAME OF PRFDARER

                                                                 . C. Tollison, Jr.                                               payy .           919 457-9521                            2

.

 .

LER CONTINUATION - RO# 1-79-068 Facility: BSEP Unit No. 1 Event Date: 9-27-79 specifications in such a manner as to prevent any future recurrence of this event.

         .
                                  $

1129 249}}