05000334/LER-1980-011-03, /03L-0:on 800226,during Boron Injection Flow Path Verification,Operator Stroked MOV-SI-869A Connecting Charge Sys Fill Header to RCS Hot Leg Piping.Valve Opened & Linestarter Tripped.Caused by Burnt Motor in MOV-SI-869A

/03L-0:on 800226,during Boron Injection Flow Path Verification,Operator Stroked MOV-SI-869A Connecting Charge Sys Fill Header to RCS Hot Leg Piping.Valve Opened & Linestarter Tripped.Caused by Burnt Motor in MOV-SI-869A

ML19344D302
Person / Time
Site:	Beaver Valley
Issue date:	03/04/1980
From:	Werling J DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19344D281	List: 05000334/LER-1980-007-01, Er 80-007/01T-0:on 800121,during Reload After Defueling, Main Filter Banks Found Not in Svc.Caused by Procedural Inadequacy Because None of Refueling Checklists Indicated Tech Spec Change That Required Flow 05000334/LER-1980-010-03, /03L-0:on 800131,refueling Team Was Given Go Ahead for Core Alterations.Fifteen Minutes Later,Inservice Boric Acid Transfer Pump CH-P-2B Tripped on Thermal Overload. Probably Caused by Faulty Blender Controls Shifting Speed 05000334/LER-1980-011-03, /03L-0:on 800226,during Boron Injection Flow Path Verification,Operator Stroked MOV-SI-869A Connecting Charge Sys Fill Header to RCS Hot Leg Piping.Valve Opened & Linestarter Tripped.Caused by Burnt Motor in MOV-SI-869A ML19344D280
References
LER-80-011-03L, LER-80-11-3L, NUDOCS 8003110647
Download: ML19344D302 (2)

LER-1980-011, /03L-0:on 800226,during Boron Injection Flow Path Verification,Operator Stroked MOV-SI-869A Connecting Charge Sys Fill Header to RCS Hot Leg Piping.Valve Opened & Linestarter Tripped.Caused by Burnt Motor in MOV-SI-869A

Event date:
Report date:
3341980011R03 - NRC Website

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problem with the personnel in the reactor cavity who were decontaminating the area in preparation for stud installation and tensioning. The operator was dire::ted at this time to close the VCT outlet valves [MOV-CH-115C E] to terminate the level increase. The valve [MOV-Cll-115C) did not stroke closed as was indicated by both open and closed indicating lights being lit at the

- same time. Valve [MOV-Cll-115E), however, did fully close and stopped the level increase at 707. in the loops. There was no hazard to the public at any time during the event since several flow paths were availabic for makeup to the RCS.The failure of the VCT outlet' valve was ut.'ed by (irty torque switch contacts.

A redundant flow path through [MOV-SI-836] was ver ad operable.

No alternate action was required on [MOV-CH-115C) since its opr on is only required in Modes 1 through 4.

The motor operator was replace mediately under Maintenance Work Request 800242. This incident has been consh. ed closed pending final analysis of the problem with Limitorque valve operators.

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