05000272/LER-1980-016-03, /03L-0:on 800319,while Taking Voltage Readings in RMS Rack,Power Supply Inadvertently Grounded by Instrument Probe,Resulting in 115 Volts Ac Breaker Trip.Caused by Personnel Error.Instrument Reset

/03L-0:on 800319,while Taking Voltage Readings in RMS Rack,Power Supply Inadvertently Grounded by Instrument Probe,Resulting in 115 Volts Ac Breaker Trip.Caused by Personnel Error.Instrument Reset

ML19305D280
Person / Time
Site:	Salem
Issue date:	04/09/1980
From:	Murphy M Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19305D277	List: 05000272/LER-1980-016, Forwards LER 80-016/03L-0 05000272/LER-1980-016-03, /03L-0:on 800319,while Taking Voltage Readings in RMS Rack,Power Supply Inadvertently Grounded by Instrument Probe,Resulting in 115 Volts Ac Breaker Trip.Caused by Personnel Error.Instrument Reset
References
LER-80-016-03L, LER-80-16-3L, NUDOCS 8004140323
Download: ML19305D280 (1)

LER-1980-016, /03L-0:on 800319,while Taking Voltage Readings in RMS Rack,Power Supply Inadvertently Grounded by Instrument Probe,Resulting in 115 Volts Ac Breaker Trip.Caused by Personnel Error.Instrument Reset

Event date:
Report date:
2721980016R03 - NRC Website

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LICENSEE EVENT REPORT lq) 1 I

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7 8 9 LICENSEE CODE 14 1b LICENSE NUM8EH 2's 26 L8 CENSE T YPE JO 67 L A 7 b8 IoI1l 5E l Ll@l ol 5 l Olo l 01 21 7 l 2 @l 0 l 3 11 l9 l8 lo l@l 0l4 l 0l9 I 810 l CON'T 7

8 60 61 DOCKET NUMBE R 68 69 EVENT DATE 74 7S REPORT DATE 80 EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES h At 2004 hours0.0232 days <br />0.557 hours <br />0.00331 weeks <br />7.62522e-4 months <br /> while taking voltage readings in a radiation monitoring system rack, l

10 l 2 l l This action l

FTTl I the power supply was inadvertently grounded by an instrument probe.

ITTTI I caused the 115 VAC breaker supplying the rack to trip and a voltage transient l

occurred on the 1B 115 VAC vital instrument bus resulting in the Air Particulate l

o s l O 6 l Detector to trip.

In addition, spurious outputs from the computer printed out and a l Action Statement l

lO l7l l spurious RMS output caused a containment ventilation isolation.

10lsl l 3.3.3.1 and 3.4.6.1 were entered. Alarms were verified cleared, containment ventilation isolation reset and APD returned to service.

The Action Statements were terminated 80 7

8 9

CAUSE

CAUSE COYP.

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9 10 11 12 12 18 19 20 SE QUE NTI AL OCCU R R E NCE REPORT R E V ISIO'.

En na EVENT VE AR RE80RT NO CODE TYPE NC.

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40 el 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h ITTTl I The grounding of a Radiation Monitoring System power supply caused a voltage l

l1 l1l l transient on 115 VAC vital instrument bus.

The Air Particulate Detector tripped, l

numerous spurious outputs from the computer printed out and a spurious RMC output l

1 7 l gl caused a containment ventilation isolation. All abnormal conditions were verified l

i 4 l invalid and reset. The APD was placed back in service. Proper use of test instru-l So 8,(m,ents was reviewed with instrume tegici,ansandsupervisors.oisCOvERv oEsCR!PTiON h svATus

• . Poe.E n OTHER status DiscovERv W@ l1 l 010 fhl N/A l

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44 45 46 Altiviiv Co$ TENT CELE ASED OF RELE ASE AVOUNT OF ACTivlTv LOCATION OF RELE ASE d h W@l N/A l

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1 6 80 7

8 9 10 11 44 45 PERSONNEL FXPOSURES NUMBER TYPE

DESCRIPTION

I l 01 0 l 0 l@[,Z,,,j@l N/A i 7 PERsONNE L INJURIES DESCRIPTION @

I NuMetR 10l 0 l O l@l N/A i

8 80 7

8 9 11 12 LOSS OF OR DAMAGE TO FACILITY h l

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DESCRIPTION

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N/A 80 7

8 9 10 l

ISSUE

DESCRIPTION

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NAME OF PREPARER 8 0001 W--3