05000327/LER-1980-101-03, /03L-0:on 800622,steam Generator Level Indicator 1-L1-3-51 Was Reading 10% Higher than Other Two Indicators. Caused by Defective Transmitter.Defective Transmitter Was Replaced

/03L-0:on 800622,steam Generator Level Indicator 1-L1-3-51 Was Reading 10% Higher than Other Two Indicators. Caused by Defective Transmitter.Defective Transmitter Was Replaced

ML19330A953
Person / Time
Site:	Sequoyah
Issue date:	07/21/1980
From:	Reynolds R TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19330A947	List: 05000327/LER-1980-101, Forwards LER 80-101/03L-0 05000327/LER-1980-101-03, /03L-0:on 800622,steam Generator Level Indicator 1-L1-3-51 Was Reading 10% Higher than Other Two Indicators. Caused by Defective Transmitter.Defective Transmitter Was Replaced
References
LER-80-101-03L, LER-80-101-3L, NUDOCS 8007290827
Download: ML19330A953 (2)

LER-1980-101, /03L-0:on 800622,steam Generator Level Indicator 1-L1-3-51 Was Reading 10% Higher than Other Two Indicators. Caused by Defective Transmitter.Defective Transmitter Was Replaced

Event date:
Report date:
3271980101R03 - NRC Website

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Tennessee Valley Authority Sequoyah Nuclear Plant LER SUPPLEMENTAL INFORMATION SQRO-50-327/80101 Technical Specification Involved:

3.3.2.1 Reported Under Technical Specification:

6.9.1.13.b Date of Occurrence: 6/22/80 and 6/24/80 Time of Occurrence:

1450 CDT and 1432 CD'.

Identification and Description of Occurrence:

In both casen, while in Mode 3, the unit operator observed the indicator, 1-L1-3-51, to be approximately 10% higher than the other two redundant indicators.

Conditions Prior to Occurrence:

Mode 3 Actions specificd in the Technical Specifications Surveillance Requirements met due to inoperable equipment.

3.3.2.1 Action 16 the channel was placed in a tripped condition within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.

Apparent Cause of Occurrence:

The transmitter located on panel L-182 in fan room 2 failed to maintain calibration at its operating pressure.

Analysis of Occurrence:

Defective transmitter. There wcs no safety hazard to the public as a result of this occurrence. This is the first report of this defect.

Corrective Action

The defective transmitter was replaced. The new transmitter was calibrated and its time response tested. The corrective action was completed in 39 hours4.513889e-4 days <br />0.0108 hours <br />6.448413e-5 weeks <br />1.48395e-5 months <br />.

Failure Data:

None l