ML18139A668

LER 80-048/03L-0:on 800721,w/unit at 100% Power, Investigation Revealed That Amp Readings for Circuit 22A Boron Injection Tank Inlet Panels 1 & 2 Were Below Tech Specs.Caused by Excess Amount of Heat Tracing Tape

ML18139A668
Person / Time
Site:	Surry
Issue date:	08/19/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A667	List: ML18139A666 ML18139A668
References
LER-80-048-03L-01, LER-80-48-3L-1, NUDOCS 8008250660
Download: ML18139A668 (2)

Text

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LWith Unit 1 at 100% power an investigation reveE.1-::i th.st the. amp readings for circuit Io I 3 J 122A (Boron Injection Tank Inlet) Panels 1 & 2 wsr-:: belC".J the acceptance' criteria

! o j 4] 'l stipulated in the PT. A power reduction and rep2.i=- of the defective circuits were

!TI}] I initiated immediately. This is a degraded mode ,oi operation as specified in T. s. 3. 3.

I.~ l(A)4 and is reportable in accordance with T.S.6.o.2.b(2) After completion of repairs,

~ normal power operation resumed. Therefore the he2Ith ruid safety of the public were 1

_E.l.[J I not affected.

8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE I R , e LU CODE CODE SUBCODE COMPDNE'.'T :ODE SUBCODE SUBCODE

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32 ACTION TAKEN FUTURE ACTION EFFECT SHUTDOWN r:;:::,. ATT.i.::HMENT NPRD-4 PRIME COMP. COMPONENT ON PLANT METHOD HOURS ~ SUB1AITTED FORM~UB. "SUPPLIER MANUFACTURER

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

! The heat tracing tape for this circuit was comple=ely replaced. No additional actions were deemed necessary.

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8 9 BO FACILITY METHOD OF A STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION \:31 1:TIJ ~@ I 1 I o I 8 9 10 oj@,..._l__N.. .; .; ;A_ _ ___,

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RELEASED OF RELEASE AMOUNT OF ACTIVITY~ LOCATION OF RELEASE@

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NUMBER (':;:;\ TYPE DESCRIPTION I O IO I O 1'221~@1--_____NA_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ______..

8 9 11 12 13 BO PERSONNEL INJURIES ,,;";\

NUMBER DESCRIPTION~

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8 9 ,, 12 BO LOSS OF OR DAMAGE TO FACILITY '4J' TYPE DESCRIPTION "-::J TIJ LU@ .

,,o NA 8 9 10 80 PUBllCITY C\ 8 00 NRC USE ONLY 8250

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ISSUEDQ DESCRIPTION~

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J.L. Wilson - (804} 357-3184 0 ll.

NAME OF PRE P A R E R - - - - - - - - - - - - - - - - - - - PHONE:--------------

~-., ~TACH'.*lENT 1 SL~l3Y POWER STATION, UNIT DOC~ET NO. 50-280 e

REPORT NO. 80-048/03L-C EVE:~T DATE: 7-21-80 TITLE OF REPORT: HEAT TRACING FAILLRE

1. Description of Event:

With Unit I at 100% pow....,cor, a investigation revec.led that the amp readings for circuit 22A (Boron Inje::::tior:. Tank Inlet) Panels 1 & 2 were below the Acceptance Criteria Stipulated in ~he ?T. A power reduction and repair of the defective circuits was specifice~ i~ T.S.3.3.A.4 and is reportable in accordance with T.S.6.6.2.b(2)

2. Prob ab le Consequences & Status of Redundant Sys te::is:

A power reduction was initiated due to the failure of both redundant circuits All repairs and actions were within the Technical Specifications.The.heat tracing is intended to maintain. a te:ipe*rature abo:ve. th2.t :i.eeded _for flow -and flow *was maintained; therefore,tbe health and safety of the public were not affected.

3. Cause:

Since this tape 'b:?-d recently been replaced, the T!=-ason for failure: was an ..

excess-*amount* of tape a?plietl for the size of pipe heat requirements.

4. Irrrrnediate Corrective Action:

The irrrrnediate corrective action was to commence a power reduction and to replace the defective heat tracing tape. This infonnation will be provided to the task force §tud~.lLil.g trre heat.tracing systeI:c for further evaluatibn.

After replacing the heac tra::ing tape, operability of the affected Heat Tracing Circuit was verified and the unit returned to normal power operation.

5. Subsequent Corrective Action:

Since the subject circuit is continously monitored, no subsequent action is requir_ed.

6. Action Taken to Prevent Recurrence:

No additional actions were deemed necessary.

7. Generic Implications:

A task force has been estc.:1Eshed to study the total spectrum of the heat tracing system in an atceqt to discern present p:-oblems and recommend solutions which will eli~i~ate sporadic failures experienced.