05000316/LER-1981-019-03, /03L-0:on 810512,plug Discovered Missing from Tee in Sensing Line to Upper Containment Pressure Transmitters Following Refueling Outage.Caused by Rotameter Inadvertently Installed at Tee During Type a Integrated Leakrate Tes

/03L-0:on 810512,plug Discovered Missing from Tee in Sensing Line to Upper Containment Pressure Transmitters Following Refueling Outage.Caused by Rotameter Inadvertently Installed at Tee During Type a Integrated Leakrate Test

ML20004F120
Person / Time
Site:	Cook
Issue date:	06/10/1981
From:	Rischling J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20004F114	List: 05000316/LER-1981-019-03, /03L-0:on 810512,plug Discovered Missing from Tee in Sensing Line to Upper Containment Pressure Transmitters Following Refueling Outage.Caused by Rotameter Inadvertently Installed at Tee During Type a Integrated Leakrate Tes
References
LER-81-019-03L, LER-81-19-3L, NUDOCS 8106160523
Download: ML20004F120 (2)

LER-1981-019, /03L-0:on 810512,plug Discovered Missing from Tee in Sensing Line to Upper Containment Pressure Transmitters Following Refueling Outage.Caused by Rotameter Inadvertently Installed at Tee During Type a Integrated Leakrate Test

Event date:
Report date:
3161981019R03 - NRC Website

text

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vsNT osscnierioN ANO pmotASLE CONSEQUENCES h l AFTER ENTERING MODE 3 FOLLOWING A REFUELING OUTAGE. IT WAS DISCOVERED THAT A PLUG I

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fo'iT1 1 MITTERS PPA-310 AND PPA-311. THIS IS NON-CONSERVATIVE IN RESPECT TO T.S. 3.6.1.1.

I ITTslI WilICH REQUIRES THAT PRIMARY CONTAINMENT INTEGRITY BE MAINTAINE9. PPA-310 AND PPA-311 1 1777] l ACTUATE CONTAINMENT PRESSURE ALARMS AND 00 NOT HAVE ANY ESF FUNCTIONS.

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, lTTTl l INVESTIGATION REVEALED THAT THE PLUG FROM A TEE IN THE SENSING LINE TO PPA-310 WAS I

gi REMOVED DURING THE TYPE A INTEGRATED LEAKRATE TEST. DURING THE INSTRUMENT SETUP I

m lFOR THIS TEST, A ROTAMETER WAS INADVERTANTLY INSTALLED AT THE TEE. THIS ROTAMETER I

( m : WAS LATER MOVED TO THE CORRECT TEST POINT. WHEN THE ROTAMETER WAS REMOVED, PERSONNEL l m l NEGLECTED TO REPLACE THE PLUG IN THE TEE.

(SEE ATTACHED SUPPLEMENT)

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ATTACHMENT TO LER# 81-019/03L-0 SUPPLEMENT TO CAUSE DESCRIPTION THIS WAS NOT NOTICED DURING THE TEST SINCE AN ISOLATION VALVE UPSTREAM 0F THE TEE WAS SHUT.

TO PREVENT RECURRENCE.OF THIS TYPE OF INCIDENT, THE INTEGRATED LEAKRATE TEST PROCEDURE HAS BEEN MODIFIED TO VERIFY THE PROPER SYSTEM ISOLATION OF TEST AND INSTRUMENT CONNECTIONS IN THE VICINITY OF THE ILRT INSTRUMENT SETUP. THE~ PERFORMANCE ENGINEERS ALSO RECEIVED ADDITIONAL TRAINING, EMPHA-SIZING THE IMPORTANCE OF REPLACING PIPE CAPS OR PLUGS WHICH ARE REMOVEC FOR TEST PURPOSES.

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