ML19261D476

LER 79-051/03L-0 on 790516:while Performing Daily Shutdown Surveillance SP-301,fire Svc Tank Level Discovered to Be 3,600 Gallons Below Min Allowed.Caused by Improper Design. Alarm Setpoint Raised to Tech Spec Limit

ML19261D476
Person / Time
Site:	Crystal River
Issue date:	06/05/1979
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19261D471	List: ML19261D470 ML19261D476
References
LER-79-051-03L, LER-79-51-3L, NUDOCS 7906190303
Download: ML19261D476 (2)

Text

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, g o i,; i gallons below the minimum allowed in Technical Specifications. This I o s  ; created an event contrary to Technical Specification 3.7.11.1. Alternate f

, , , water supplies were available from Fire. Service Tank FST-1A and Units 1&2. j

, , , , No effect upon public health and safety. This is the fourth occurrence  ;

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Cause

,The cause ossemetics of this Aso::aat:n event is attr E A: ::ss @ibuted to improper The , design.

low level I g ,3 ; alarm was originally installed below the level required to meet the T.S. t

, , , limit of 345,000 gallons. Modification 79-03-63, to raise the alarm set- g

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SUPPLEMENTARY INFORMATION Report No.: 50-302/79-051/02L-0 Facility: Crystal River Unit #3 Report Date: 7 June 1979 Occurrence Date: 16 May 1979 Identification of Occurrence:

The Fire Suppression System inoperable contrary to Technical Specification 3.7.11.1.b.

Conditions Prior to Occurrence:

Mode 6 refueling.

Description of Occurrence:

At 0100 while performing Daily Shutdown Surveillance SP-301, it was discovered that the Fire Service Tank (FST-1B) volume was 3,600 gallons below the minimum Technical Specification require-ment of 345,000. FST-1B was refilled to within specification and was declared operable at 0700 on 16 May 1979.

Designation of Apparent Cause:

The cause of this event is attributed to improper design. The low level alarm setpoint was established below the level required to meet Technical Specification requirements.

Analysis of Occurrence:

No effect upon public health and safety. Alternate water supplies were available from Fire Service Tank FST-1A and Units 1 and 2.

Corrective Action: Modification 79-3-63, initiated as a result of previous occurrences, raises the low level alarm setpoint above the Technical Specifica-tion limit. This modificatior was completed 5 June 1979. No further corrective action required.

Failure Data:

This is the fourth occurrence reported. Reference LER's 79-15 and 79-42.

rc 2307 261