ML19269C291

LER 79-001/03L-0 on 790101:during Operating Daily Surveillance Log Survey (SP-300),noted That Pressure in B Core Flood Tank Was 630 Psi.Caused by Operator Error During Repressurization

ML19269C291
Person / Time
Site:	Crystal River
Issue date:	01/24/1979
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19269C289	List: ML19269C288 ML19269C291
References
LER-79-001-03L, LER-79-1-3L, NUDOCS 7901310057
Download: ML19269C291 (2)

Text

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SUPPLEMENTARY INFORMATION Report No.: 50-302/79-001/03L-0 Facility: Crystal River Unit #3 Report Date: 24 January 1979 Occurrence Date: 1 January 1979 Identification of Occurrence:

Core flood tank "B" inoperable contrary to Technical Specification 3.5.1.

Conditions Prior to Occurrence:

Mode 1 operation. (100%)

Description of Occurrence:

At 0900, during performance of Surveillance Procedure (SP-300)

Operating Daily Surveillance Log, it was discovered that the pressure in "B" core flood tank had been beyond the Technical Specification limi*; of 625 psi for four consecutive shifts. "B" core flood tank pressure reached 630 psi. Pressure was reduced to within Technical Specification limits in 15 minutes.

Designation of Apparent Cause:

The cause of this event is attributed to the operator allowing the pressure in "B" core flood tank to exceed Technical Specifica-tion limits during re-pressurization.

Analysis of Occurrence:

There was no safety hazard to the plant or general public as redundant ECCS was available and operable.

Corrective Action:

Revision to Operating Procedure OP-401, Core Flooding System, is being implemented to prevent recurrence.

Failure Data: Firat occurrence of this type.

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