ML18138A058

LER 80-011/03L-0:on 800128,during Normal Operations,Heat Tracing Strip Heater on 1-CH-P-2A Circuit 25A (Panel 9) Failed.Caused by Penetration of Water Leakage from Pump Flange.Strip Heater Replaced & Leak Repair Requested

ML18138A058
Person / Time
Site:	Surry
Issue date:	02/25/1980
From:	Stewart W, Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18138A057	List: ML18138A056 ML18138A058
References
LER-80-011-03L-01, LER-80-11-3L-1, NUDOCS 8003030554
Download: ML18138A058 (2)

Text

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~ - NUCLEAR REGULATORY COMMISSION (7-77)

LICENSEE EVENT REPORT CONTROL BLOCK: j '1'

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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~~~~~ LJG)IO Is 10 10 10 12 1s 10 1010 11 12 1s 1s 10 IG)lo 12 12 Is Is lo 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 10 EVENT DESCRIPTION _AND PROBABLE CONSEQUENCES@

I During normal operations, routine surveillance indicated the failure of heat

~ I tracing strip heater on l-CH-P-2A circuit 25A (Panel 9). The redundant heat

~ I tracing circuit was operable. This event, which is contrary to Tech. Spec-.

~ I 3.2.B.5, is allowable as a degraded mode of operation as outlined i~ Tech.

~ I Spec. 3.2.D.3, and is reportable by 6.6.2.b.2. The health and safety of C§J2J I the public were not affected.

[QJTI 7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE

,e CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

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7 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION 0.

~ REPORT NUMBER

,s LER/RO CV ENT YE.A.A 21 10 I 22 23 10 24 REPORT NO;

~ 11 J 26 27 28 CODE 1° 13 I 29 TYPE Li 30 l.=:J 31 NO.

LQJ 32 ACTION FUTURE EFFECT SHUTDOWN ~ ATTACHMENT NPRD-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED

• FORM SUB. SUPPLIER

~ I OI OI OI I MANUFACTURER

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35 36 37 40 l2..J@

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~ ~@) I c 12 16 18 I 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

!Water leakage from the pump flange penetrated the heat tracing tape causing the CIII] 1 malfunction. The strip heater was replaced and a maintenance request submitted

[III] to repair the leak.

1 ITTIJ r:IITI 7 8 9 80 FACILITY

@ METHOD OF A STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION ~

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45 46 80 ACTIVITY CONTENT Q\

' RELZASED OF RELEASE AMOUNT OF ACTIVITY~ LOCATION OF RELEASE @

~ l.:J@) ~@1....J__NA ______ --J NA 7 8 9 . 10 'IT 44 45 80 PERSONNEL EXPOSURES ~

NUMBER . TYPE DESCRIPTION 39 C2JII Io I u Io J@L:JL------------------------_....

7 8 9 11 12 13 80 PERSONNEL INJURIES ~

NUMBER DESCRIPTION 41

~ I O I u 1° l@L-.-__________________________,

7 8 9 11 12 80 LOSS OF OF, DAMAGE TO FACILITY '4J' TYPE DESCRIPTION ":::;J

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e ATTACHMENT 1 (Page 1 of 1)

Surry Power Station, Unit 1 Docket No. 50-280 Report No. 80-011/031-0 Event Date: 1-28-80 Title of Report: Heat Tracing System Component Failure (Strip Heater)

1. Description of Event:

During normal operations routine surveillance disclosed the failure* of the heat tracing system strip heater,Boric Acid Transfer Pump l-CH-P-2A, circuit 25A, panel 9. This event is contrary to Tech. Spec. 3.2.B.5, allowable by 3.2.D.3 and reportable by 6.6.2.b.(2).

2. Probable Consequences and Status of Redundant Systems:

The required temperature was maintained in the line since the redundant heat tracing system was operable. The health and safety of the public were not affected.

3. Cause:

Failure of the strip heater developed when water leaking from the pump flange penetrated the heat tracing system.

4. Immediate Corrective Action:

The heat tracing tape was replaced and a maintenance report submitted to repair the leaking flange.

5. Scheduled Corrective Action:

The pump flange leak will be repaired when system conditions allow.

6. Action Taken to Prevent Recurrence:

None.

7. Generic Implication:

A task force has been formed to investigate the continuing failures to the heat tracing system and to recommend solutions to the problem.

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