ML19273B408

LER 79-023/03L-0 on 790308:discovered RCS C1 Concentration Was .17ppm,contrary to Tech Specs.Caused by Appearance of Suspended Solids During Cooldown When Boron Concentration Increased.Purification Sys Reduced Concentration

ML19273B408
Person / Time
Site:	Crystal River
Issue date:	03/28/1979
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19273B405	List: ML19273B404 ML19273B408
References
LER-79-023-03L, LER-79-23-3L, NUDOCS 7904060298
Download: ML19273B408 (2)

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SUPPLDENTA?Ji INF0FF.ATION Report No. 50'302/79-023/03L-0 Facility: Crystal River Unit 13 Report Date: 28 March 1979 Occurrence Date: 3 March 1979 Identification of Occurrence:

Reactor coolant system chemistry not maintained within the limits of Technical Specification 3.4.7.

Conditions Prior to Occurrence:

Mode 5 (cold shutdown operation)

Descriptica of Occurrence:

At 2245, during reactor coolant sampling at cold shutdown, it was discovered that the reactor coolant system chl^ ride concentration was .17 ppa. This exceeded the Technical Specification limit o f .15 ppe. Reactor coolant system purification reduced the chloride concentration to .12 ppa on 9 March 1979.

Designation of Apparent Cause:

Chloride as well as suspended solids often appear during cooldc<wn when boron concentration is increased and crud is released from surfaces of the RCS.

Analysis of Occurrence:

No effect upon public health and safety as the chloride concen-tration was within the cleanup capability of the reactor coolant purification system.

Corrective Action:

Reactor coolant system purification reduced chloride concentration to within Technical Specification limit at 0500 on 9 March 1979.

No further corrective necessary.

Failure Data:

This is the first occurrence of this type reported.

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