05000280/LER-1981-062-03, /03L-0:on 811017,radiation Monitor RI-CC-105 Failed to Give Indication.Caused by Broken Wire Located on Detector Probe.Wire Reconnected

/03L-0:on 811017,radiation Monitor RI-CC-105 Failed to Give Indication.Caused by Broken Wire Located on Detector Probe.Wire Reconnected

ML20005C090
Person / Time
Site:	Surry
Issue date:	11/06/1981
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20005C080	List: 05000280/LER-1981-060-03, /03L-0:on 811013,outlet Valve from Chemical Addition Tank Would Not Cycle Electrically.Caused by Motor Operation Overload Protection Thermalling Open While Attempting to Cycle Valve,Due to Overly Tightened Valve 05000280/LER-1981-062-03, /03L-0:on 811017,radiation Monitor RI-CC-105 Failed to Give Indication.Caused by Broken Wire Located on Detector Probe.Wire Reconnected 05000280/LER-1981-063-03, /03L-0:on 811019,charging Pump Svc Water Pump 1-SW-P-10B Found to Have Zero Discharge Pressure Because of Loss of Suction to Pump.Caused by Increased Use of Svc Water by Chillers.Flow to Chillers Throttled ML20005C079
References
LER-81-062-03L-03, LER-81-62-3L-3, NUDOCS 8111180376
Download: ML20005C090 (2)

LER-1981-062, /03L-0:on 811017,radiation Monitor RI-CC-105 Failed to Give Indication.Caused by Broken Wire Located on Detector Probe.Wire Reconnected

Event date:
Report date:
2801981062R03 - NRC Website

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ATTACle!ENT 1 SURRY POWER STATION, UNIT 1 DOCKET NO:

50-280 REPORT NO:

81-062/03L-0 EVENT DATE: 17-81 TITLE OF THE EVENT:

RM-CC-105 Failure 1.

DESCRIPTION OF EVENT

With unit 1 at 1007. steady state operation, radiation monitor RI-CC-105, component cooling water "A", failed to give indication while performing Periodic Test 26.1.

This is contrary to Technical Specification 3.7.E and reportable per T.S.6.6.2.b(4).

2.

PROBABLE CONSEQUENCES:

The ef fluent from the component cooling surge tank vent enters the process vent system where it is continuously monitored. No increase in activity was evident; therefore, the health and safety of the public vere not affected.

3.

CAUSE

Failure of the monitor was caused by a broken wire located oa the detector probe. A cause for the broken wire could not be conclusively determined.

4.

IMMEDIATE CORRECTIVE ACTION

The immediate corrective actions were to verify the operability of RI-CC-106, component cooling water "B" radiation monitor, and cross connect the two units' component cooling water systems.

5.

SUBSEQg CORJR _CTIVE ACTION:

i The wire was reconnected to the detector probe and the monitor tested satisfactorily.

6.

ACTION TAKEN TO PREVENT RECURRENCE:

None required.

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7.

CENERIC IMPLICATIONS:

No generic implications are associated with this event.

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