ML18139A550

LER 80-021/03L-0:on 800826,while Attempting to Pressurize Accumulator B Using Normal Nitrogen Supply,Pressure Fell Below Allowable Limits.Caused by Leak & Low Pressure in Nitrogen Fill Header.Added Pressure to Sys & Repaired Leak

ML18139A550
Person / Time
Site:	Surry
Issue date:	09/25/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A548	List: ML18139A547 ML18139A549 ML18139A550
References
LER-80-021-03L-03, LER-80-21-3L-3, NUDOCS 8009300508
Download: ML18139A550 (2)

Text

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I While attempting to pressurize *"B" Accumulator using normal Nitrogen supply, the pressure on "B" Accumulator*was reduced below allowable limits. This event is contrary I to Technical Specifications 3.3.A.2 and is reportable as per ~echnical Specifications

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e ATTACHMENT 1 SURRY POWER STATION, UNIT 2 DOCKET NO: 50-281 REPORT NO: 80-021/03L-0 EVENT DATE: 08-26-80 TITLE OF REPORT: LOW NITROGEN PRESSURE ON "B" ACCUMULATOR

1. Description of Event:

While attempting to pressurize "B" Accumulator using normal Nitorgen supply to the accumulators, the pressure on "B" Accumulator was reduced below the allowable limits. This event is contrary to Technical Speci-fications 3.3.A.2 and is reportable as per Technical Specifications 6.6.2.b.(2)

2. Probable Consequences and Status of Redundant System:

Technical Specification allows for the isolation of one accumulator for a period not to exceed 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. The other two accumulators re-mained operable. The pressure in 'B' accumulator was returned to required specification within the four hours limitation. Therefore the health and safety of the public was not affected.

3. Cause:

The low accumulator pressure was caused by a leak and low pressure in

. the nitrogen fill header.

4. Immediate Corrective Action:

"B" accumulator was declared inoperable. Additional nitrogen supply pressure was added to the fill system and "B" accumulator was pressurized and declared operable. The accumulator was inoperable for 95 minutes.

5. Subsequent Corrective Action:

Repairs were made to the leaking fittings on the fill header.

6. Action to Prevent Recurrence:

The above corrective action will prevent recurrence.

7. Generic Implications:

None

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