05000327/LER-1980-017-03, /03L-0:on 800310,while in Mode 6,turbine Bldg Sump Monitor O-RM-90-212 Alarm Kept Coming In.Monitor Was Declared Inoperable.Caused by Malfunctioning Flow Switch Not Allowing Sufficient Flow Through Monitor

/03L-0:on 800310,while in Mode 6,turbine Bldg Sump Monitor O-RM-90-212 Alarm Kept Coming In.Monitor Was Declared Inoperable.Caused by Malfunctioning Flow Switch Not Allowing Sufficient Flow Through Monitor

ML19309E114
Person / Time
Site:	Sequoyah
Issue date:	04/08/1980
From:	Record D TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19309E109	List: 05000327/LER-1980-017, Forwards LER 80-017/03L-0 05000327/LER-1980-017-03, /03L-0:on 800310,while in Mode 6,turbine Bldg Sump Monitor O-RM-90-212 Alarm Kept Coming In.Monitor Was Declared Inoperable.Caused by Malfunctioning Flow Switch Not Allowing Sufficient Flow Through Monitor
References
LER-80-017-03L-01, LER-80-17-3L-1, NUDOCS 8004180407
Download: ML19309E114 (2)

LER-1980-017, /03L-0:on 800310,while in Mode 6,turbine Bldg Sump Monitor O-RM-90-212 Alarm Kept Coming In.Monitor Was Declared Inoperable.Caused by Malfunctioning Flow Switch Not Allowing Sufficient Flow Through Monitor

Event date:
Report date:
3271980017R03 - NRC Website

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This is contrary to LCO 3.3.3.9.

SI-414 was initiated to meet action statement 29 of Table 3.3-12.

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1.. r - t Flow switch FS-90-212, Gems Sensors, Part No. 25364, was malfunctioning

., u t. rc,i iL and was replaced. Monitor was declared operable at 17__00 CST ~on.3/10/80.

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Daniel J. Record

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8004180 M O h u

Tcnne cca Vellsy Authority Sequoyah Nucisar Plcnt LER SUPPLEMENTAL INFORMATION SQRO-50-327/ 8017 Technical Specification Involved 3.3.3.9 Reported Under Technical Specification 6.9.1.13.b Date of Occurrence: 3/10/80 Time of Occurrence: 1030 CST Unit 1 Identification and Description of Occurrence:

At 1030 CST, 3/10/80, the Turbine Building Sump Monitor, 0-RM-90-212, was declared inoperable in order to work on flow switch FS-90-212.

This is contrary to LCO 3.3.3.9 requiring this monitor be operable.

Conditions Prior to Occurrence:

Unit 1 in Mode 6 following initial core loading.

i Action specified in the Technical Specification Surveillance Requirements met due to inoperable equipment. Describe.

SI-414, Turbine Building Sump and ERCW Discharge Radioactivity, was initiated to satisfy Action 29 of Table 3.3-12.

Apparent Cause of Occurrence:

Malfunction of flow switch FS-90-212. This switch initiates an alarm if flow through the radiation monitor is not detected.

Analysis of Occurrence:

There was no hazard to the public health or safety.

Corrective Action

Flow switch was replaced.

Failure Data:

Switch was supplied by General Atomic, manufactured by Delaval Turbine, Inc.,

Gems Sensors, Part No. 25364. There have been no previous failures.