05000302/LER-1980-026-03, /03L-0:on 800714,while Performing SP-710 Rc Decay Heat Removal & Rc Makeup Sys Chemistry Surveillance Program, Chloride & Fluoride Concentrations Exceeded Limits.Caused by High Temp of Decay Heat Sys & Migration of Elements

/03L-0:on 800714,while Performing SP-710 Rc Decay Heat Removal & Rc Makeup Sys Chemistry Surveillance Program, Chloride & Fluoride Concentrations Exceeded Limits.Caused by High Temp of Decay Heat Sys & Migration of Elements

ML19331B578
Person / Time
Site:	Crystal River
Issue date:	08/06/1980
From:	Neuschaefer E FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19331B572	List: 05000302/LER-1980-026, Forwards LER 80-026/03L-0 05000302/LER-1980-026-03, /03L-0:on 800714,while Performing SP-710 Rc Decay Heat Removal & Rc Makeup Sys Chemistry Surveillance Program, Chloride & Fluoride Concentrations Exceeded Limits.Caused by High Temp of Decay Heat Sys & Migration of Elements
References
LER-80-026-03L, LER-80-26-3L, NUDOCS 8008120458
Download: ML19331B578 (2)

LER-1980-026, /03L-0:on 800714,while Performing SP-710 Rc Decay Heat Removal & Rc Makeup Sys Chemistry Surveillance Program, Chloride & Fluoride Concentrations Exceeded Limits.Caused by High Temp of Decay Heat Sys & Migration of Elements

Event date:
Report date:
3021980026R03 - NRC Website

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_OP-404, Decay Heat Removal System,has been revised to limit Decay Heat System temperature to prevent recurrence of,this type event.

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SUPPLEMENIARY INFORMATION Report No:

50-302/80-026/03L-0 Fccility:

Crystal River Unit #3 R: port Date:

1 August 1980 Occurrence Date:

14 July 1980 Idsntification of Occurrence:

Reactor Coolant system chloride and fluoride concentrations exceeded the limits of Technical Specification 3.4.7.

Conditions Prior to Occurrence:

Mode 5 cold shutdown.

D2 cription of Occurrence:

During a period extending from 0030 on 14 July to 1245 on 15' July, the chloride and fluoride concentration in the Reactor Coolant System, ex-ceeded the Technical Specification limit on three (3) occasions. The longest time out-of-specification being six (6) hours and 15 minutes.

The maximum concentrations reached for chloride and fluoride were 0.18 ppm and 0.25 ppm respectively. A review of the Operator's log revealed that prior to each chloride and fluoride increase, an increase in Decay Heat System temperature had occurred.

DIcignation of Apparent Cause:

The apparent cause of this event is attributed to chloride and fluoride migration from the inservice demineralizer due to increasing temperature of the Decay Heat System.

Increase in temperature decreases demineral-izers capacity for chloride and fluoride.

Anclysis of Occurrence:

There was no hazard created for the plant or general public as a result of this event.

Corrective Action

l Makeup and Purification System reduced chloride and fluoride concentra-tion to within Technical Specification limits. OP-404, Decay Heat Re-moval System, has been revised to limit Decay Heat temperature to pre-vent recurrence of this type event.

Fcilure Data:

This is the fifth occurrence of this type reported. However, the first as a result of increased system temperature.

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