05000302/LER-1979-001-03, /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

/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: 05000302/LER-1979-001, Forwards LER 79-001/03L-0 05000302/LER-1979-001-03, /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
References
LER-79-001-03L, LER-79-1-3L, NUDOCS 7901310057
Download: ML19269C291 (2)

LER-1979-001, /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

Event date:
Report date:
3021979001R03 - NRC Website

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This is contrarv to the limit of 625 osi stated in Technical o is l 630 psi.

Specification 3.5.1.

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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.

/rc