05000281/LER-1980-023-03, /03L-0:on 801003,while Operating at 100% Power, During Periodic Test 27D,low Amp Readings Found on Circuit 1B,panels 10 & 11,causing Valve MOV-2867D to Be Considered Inoperable.Caused by Damaged Heat Tracing Tapes

/03L-0:on 801003,while Operating at 100% Power, During Periodic Test 27D,low Amp Readings Found on Circuit 1B,panels 10 & 11,causing Valve MOV-2867D to Be Considered Inoperable.Caused by Damaged Heat Tracing Tapes

ML18139A797
Person / Time
Site:	Surry
Issue date:	10/31/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A796	List: 05000281/LER-1980-023-03, /03L-0:on 801003,while Operating at 100% Power, During Periodic Test 27D,low Amp Readings Found on Circuit 1B,panels 10 & 11,causing Valve MOV-2867D to Be Considered Inoperable.Caused by Damaged Heat Tracing Tapes 05000281/LER-1980-026-03, /03L-0:on 801005,w/reactor at 100% Power & Redundant Low Head Safety Injection Pump Out of Svc for Maint,Operator Failed to Retest Operable Pump 2-SI-P-1a within Specified Time.Caused by Operator Oversight 05000281/LER-1980-027-03, /03L-0:on 801005,w/unit at 100% power,PT-27B Revealed That Amp Reading for Circuit 6A,boric Acid to Blender,Panel 11 Was Below Acceptance Criteria.Caused by Failure of Heat Tracing Tape Due to Excessive Heat ML18139A795
References
LER-80-023-03L-02, LER-80-23-3L-2, NUDOCS 8011040576
Download: ML18139A797 (2)

LER-1980-023, /03L-0:on 801003,while Operating at 100% Power, During Periodic Test 27D,low Amp Readings Found on Circuit 1B,panels 10 & 11,causing Valve MOV-2867D to Be Considered Inoperable.Caused by Damaged Heat Tracing Tapes

Event date:
Report date:
2811980023R03 - NRC Website

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ATTACHMENT 1 SURRY POWER DOCKET NO:

REPORT NO:

EVENT DATE:

e STATION, UNIT 2 50-281 80-023/031-0 10-03-80 TITLE OF REPORT:

1.

Description of Event

e MOV-2867D INOPERABLE This heat tracing is necessary to allow MOV-2867D and its associated piping to be considered operable.

A redundent flow path for the injection Tank Discharge was immediately verified operable.

With Unit 2 operating steady state at 100%

power, Periodic Test PT 27D was performed.

Low amperage readings were found on circuit lB, panels 10 and 11.

( a redundant flow path in the discharge piping

_from the Boron Injection Tank, BIT).

Since heat tracing is required to prevent Boron from solidifying the loss or reduction of capability of heat tracing results in reduced reliability, thus valve MOV-2867D was declared inoperable.

This contrary to T.S.3.3.A.7 and is reportable as per T.S.6.6.2.b.(2).

2.

Probable Consequences and Status of Redundant Systems:

Heat Tracing is required to prevent Boron from solidifying.

The loss or reduction of capability of the heat tracing results in reduced reliability, thus valve MOV-2867D and piping '.:i"-SI-90-1503 were declared inoperable.

Since valve MOV-2867G and all the common piping of the BIT Discharge were not affected, the health and safety of the public were not affected.

3.

Cause of Occurance:

Valve MOV-2867D and piping 3"-SI-90-1503 were declared inoperable due to mechanical damage to the heat tracing tapes as a result of rriedian_ical damag;°e while erecting scaffolding to accomodate installation of pipe supports. -

4.

Immediate Corrective Action

Pursuant to T.S.3.3.B.4, PT-18.6C was immediately initiated, demonstrating MOV-2867C to be operable.

5.

Subsequent Corrective Action:

Replaced damaged heat tracing tapes affecting MOV-2867D and line 3"-SI-90-1503.

Tested the operation of valve MOV-2867D within the time span specified by tech-nical specification T.S.3.3.B.4.

6.

Actions Taken to Prevent Recurrence:

Construction has been instructed to exercise more care with scaffolding construc-tion.

7.

Generic Implications:

None