05000302/LER-1978-026-03, /03L-0:on 780424,175 Ft Delta Temp Instrument Found Out of Calibr During SP-158 Performance.Caused by Temp Probe Failure.Temp Probes Renewed.Corrective Action Unnecessary

/03L-0:on 780424,175 Ft Delta Temp Instrument Found Out of Calibr During SP-158 Performance.Caused by Temp Probe Failure.Temp Probes Renewed.Corrective Action Unnecessary

ML19319D047
Person / Time
Site:	Crystal River
Issue date:	05/12/1978
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19319D042	List: 05000302/LER-1978-026-03, /03L-0:on 780424,175 Ft Delta Temp Instrument Found Out of Calibr During SP-158 Performance.Caused by Temp Probe Failure.Temp Probes Renewed.Corrective Action Unnecessary
References
LER-78-026-03L, LER-78-26-3L, NUDOCS 8003040964
Download: ML19319D047 (2)

LER-1978-026, /03L-0:on 780424,175 Ft Delta Temp Instrument Found Out of Calibr During SP-158 Performance.Caused by Temp Probe Failure.Temp Probes Renewed.Corrective Action Unnecessary

Event date:
Report date:
3021978026R03 - NRC Website

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@ l At 1100 durinst the performance of the W eporninvic,1 wn4, n,4n, g Instrumentation Calibration (SP-158) it was discovered that the 175 ft.

t mg Delta Temperature instrument was out of calibrat. ion.

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SUPPLEMENTARY INFORMATION 1.

R port No.:

50-302/78-026/03L-0 (m\\

2t 2111ty:

Crystal River Unit #3 3.

Report Date:

11-May 1978 4.

Occurrence Date:

24 April 1978 5.

Identification of Occurrence:

175 ft. Delta temperature indication out of calibration contrarf to Technical Specification 3.3.3.4.

6.

Conditions Prior to Occurrence:

Mode 6 refueling.

7.

Dsseription of Occurrence:

i At 1100 during the performance of the Meteorological Monitoring Instrumentation

)

Calibration (SP-158) it was discovered that the 175 ft. probe of the Delta temperature instrument had failed. Both the 175 ft. and the 33 ft. probes were replaced and cal-ibrated using SP-158, and returned to service within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

8.

Dasignation of Apparent Cause.

Cause of this event was due to the failure of the 175 ft. temperature probe.

9 21ysis of Occurrence:

No' hazard to the health and safety of the general public as-the 175 ft. and 33 ft.

temperature indications were available.

10.

Corrective Action

No corrective action necessary as new probes were installed in the 175 ft. sud 33 ft.

Delta temperature instrument.

11.

Failure Data:

First occurrence of this event.

1