05000302/LER-1979-017-03, /03L-0 on 790223:heat Trace Recorder for Concentrated Boric Acid Flowpath Was Malfunctioning & Rendered Inoperable.Caused by Failed Recorder Drive Wheel. Drive Wheel Replaced & Heat Trace Recorder Returned to Svc

/03L-0 on 790223:heat Trace Recorder for Concentrated Boric Acid Flowpath Was Malfunctioning & Rendered Inoperable.Caused by Failed Recorder Drive Wheel. Drive Wheel Replaced & Heat Trace Recorder Returned to Svc

ML19259B783
Person / Time
Site:	Crystal River
Issue date:	03/12/1979
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19259B781	List: 05000302/LER-1979-017, Forwards LER 79-017/03L-0 05000302/LER-1979-017-03, /03L-0 on 790223:heat Trace Recorder for Concentrated Boric Acid Flowpath Was Malfunctioning & Rendered Inoperable.Caused by Failed Recorder Drive Wheel. Drive Wheel Replaced & Heat Trace Recorder Returned to Svc
References
LER-79-017-03L, LER-79-17-3L, NUDOCS 7903230157
Download: ML19259B783 (2)

LER-1979-017, /03L-0 on 790223:heat Trace Recorder for Concentrated Boric Acid Flowpath Was Malfunctioning & Rendered Inoperable.Caused by Failed Recorder Drive Wheel. Drive Wheel Replaced & Heat Trace Recorder Returned to Svc

Event date:
Report date:
3021979017R03 - NRC Website

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s( E ATTACHED SUPPLEMENTARY INFORMATION SHIET) 7903230 / 6-2

s SUPPLEMENTARY INFORMATION Report No.:

50-302/79-017/03L-0 Facility:

Crystal River Unit #3 Report Date:

12 March 1979 Occurrence Date:

23 February 1979 Identification of Occurrence:

One boron injection flowpath inoperable contrary to Technical Specification 3.1.2.2.a.

Conditions Prior to Occurrence:

Mode 1 power operation (98%)

Description of Occurrence:

At 0100,,while performing daily Operating Surveillance SP-300, it was discovered that heat trace recorder 5 was malfunctioning.

Heat trace recorder 5 monitors the concentrated boric acid flowpath.

Further investigation revealed that the drive wheel had failed.

Maintenance restored operability and the recorder was returned to service at 1500.

Designation of Apparent Cause:

The cause of this event is attributed to a failed recorder drive wheel.

Analysis of Occurrence:

No effect on the plant or general public as an alternate flowpath from borated water storage tank was available and operable.

Corrective Action

The recorder drive wheel assembly was replaced. No further corrective action required.

Failure Data:

First occurrence of the heat trace system reported.

/rc