ML19095A511

Submit Licensee Event Report No. LER-78-003/03L-0 Re Failed Heat Tracing, Panel 8 Circuit 24

ML19095A511
Person / Time
Site:	Surry
Issue date:	03/28/1978
From:	Stallings C Virginia Electric & Power Co (VEPCO)
To:	O'Reilly J NRC/RGN-II
References
Serial No. 159 LER 1978-003-03L-0
Download: ML19095A511 (3)

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• . Hr*. James*P.* *o'Raill3;,)0ir~cto~*.**.::: Serial Eo *. 159 .

. Office

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• . U*. S ~ 'Nuclear Regulatory.' Commission: . 'Dciclzef No. so..:.280 .*

E.egioi1.. Ii - . Suite *81S,. * . .* Liceus.e: . iJo.

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230 '.Peachtree. Street~ Nori:hw~st .*

• Atlaud:, Georgia* .*30303: . .. .  :

. ":Pursua~t tos~:r~}~ :pb'o/~r 'station .T~chtiical Sp~difita{iqn ~;6.2 ..b.(2h .the Virginia .. Electric and Power* Cmupany 'hereby -submits*.th~: following License

'..Event* Repcn:t_for ,Stlrl'.'.y* Un~; *No. 'L-. .. . " . . . ... * . '* I

'LER~7~~fJ03/03L~O .

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NRC FORM 366 i U.S. NUCLEAR REGULATORY COMMISSION

(, " 11'.J11 LICENSEE EVENT REPORT CONTROL BLOCK: I IG) (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 .

~ I VI A I s IP

• 7 8 9 LICENSEE COOE I s I 1 101 14 ~5

° I 0, - 1 °I O I OIO I O ,~ I O [ 0101 LICENSE NUMBER ~5 26 4 j l 11 I 111 LICENSE TYPE 101 I 10 30 57 CAT 58 CON'T ITDJ  :~~~~~ 1.1...J©I o1 s I o1 o Io 12 I 8 I o1010 12 r 2 rs I 7 I 81@1 o I 3J 21 71718 10 7 8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES {10) * . .

inuring normal operation at full'power, a low temperature indication was

[]JI] jobserved on Panel 8, Circuit 24 of the heat tracing system. This circuit

((II] !serves the boric acid filter and piping. This condition was contrary to

~ 1T. S. 3.2.C.5 and is reportable in accordance with T.S. 6.6.2.b(2). The

((:II) !health and safety of the public were not affected because the redundant

~ !he~t tracing circuit was operable.

[§]TI 7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUB CODE SUBCODE ITIII 7 8 9 I Pie I@ 1.EJ@ LAJ@

10 11 12 lR..IEI AITI E!RI@

13 18 LU@

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20 SEQUENTIAL OCCURRENCE REPORT REVISION*

.LEA/RO CVE.NTYEAR REPORT NO. CODE TYPE NO.

@ REPORT NUMBER IZ I 8 I I -I Io I o I 3 l I/I I oI -31 ~ 1=J LQ1

• 21 22 23 24 26 27 28 29 30 31 32

( ACTION

_ TAKEN FUTURE ACTION EFFECT ON PLANT SHUTDOWN METHOD HOURS

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M ATTACHMENT SUBMITTED NPRD-4 FORM $US PRIME COMP SUPPLIER

• COMPON N MANUFACT1J:ER

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~ 1°1°1°1 I LI@~@)~@) 1cr21618Jtw 36 37 40 41 42 43 44 47 ~

CAUSE DESCRIPTION AND CORREC"flVE ACTIONS @ _

[IJ)) !The problem was identified as a short in the wiring to the strip heater o~

CIII] (the boric acid flow transmitter (FT-1113). The wiring was replaced and

[I]}] Jthe circuit returned to service.

liill8 1--------------------------------'---_:_

7 9

_ __J 80 FACILITY r::;;:;.,. METHOD OF ~

STATUS  % POWER OTHER STATUS ~ DISCOVERY DISCOVERY DESCRIPTION ITEl W@ Li I o I ol@I._---=NA:a.:;......._ ___. ~s A 1@_1:--P_a_n_e_l_A_l_a_rm ___________ --1 7 12 44 46 80 S AlTIVITY cJ~TENT lJ RELEASED OF RELEASE AMOUNT OF ACTIVITY@

En] w@) Lz..J@I NA I NA 7 8 9 10 11 44 45 so PERSONNEL EXPOSURES ~

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NUMBER r:;::;-, TYPE DESCRIPTION EE] I O I 010 '~@.___ _ _N_A_-_ _ _ _ _ _ _ _ _ _ _ _ ____:__ _ ___J 7 8 9 11 12 13 80 PERSONNEL INJURIES f':";\

E:0 I O10 NUMBER IO l@.______N_A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

DESCRIPTION~

_J 7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY '4J' TYzE DESCRIPTION v:.:;/ NA

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7 8 9 l:J@~-------------------------_J 10 80 PUBLICITY t::;\

ISSUEDQ DESCRIPTION~ NRC USE ONL V ITIII Lill6~----~N!!.;A:...__ _ _ _ _ _ _ _ _ _ _ _ _ ___J II IIIIIIII III 7 8 9 10 68 69 80 NAME OF PREPARER--..cT;;;..;..._;;;;L;..;;*-...:B:...a:...u~c...co_m________ PHONE::_.......;.(_8_04_);____3_5_7_-_3_1_8_4~

Docket No. 50-280 Report No. 78-003/031-0

• , Surry Power Station, Unit 1 Failed H~at Tracing, Panel 8 Circuit 24

1. Description During normal operation, a low temperature indication was observed on Panel 8, Circuit 24 of the heat tracing system. The breaker was found trip-ped. This circuit serves the boric acid filter and associated piping. The event is contrary to.Technical Specification 3.2.C.5 and is reportable in accordance with Technical Specification 6.6.2.b(2).

2. Probable Consequences The health and safety of the public were not affected by this event b.ecause the redundant channel of heat :tracing for the components involved was operable. No obstruction to boric acid flow was observed.

3. Cause of Event The problem was identified as a short circuit in the w1r1ng to the strip heater on the boric acid flow transmitter (FT-1113).

4. Immediate Corrective Action The deteriorat.ed wiring was replaced. The circuit tested satisfactori-ly and was returned to service.

5. Scheduled Corrective Action No further corrective action is scheduled or planned.

6 *. Action Taken to Prevent Recurrence No specific action is anticipated. Periodic testing provides a means of diagnosing problems in all heat tracing circuit. Faults are repaired as they are identified.

7. Generic Implications There are n~ generic implications of this event in that no manufactured unit or component exhibits a regular failure. Failures are associated with boric acid incursion.