05000325/LER-1981-031-01, /01T-0:on 810220,control Room Received Annunciator That Reactor Core Isolation Cooling Sys Turbine Tripped. Caused by Operator Tripping Turbine W/O Consent While Making Demonstration.Turbine Reset & Personnel Counseled

/01T-0:on 810220,control Room Received Annunciator That Reactor Core Isolation Cooling Sys Turbine Tripped. Caused by Operator Tripping Turbine W/O Consent While Making Demonstration.Turbine Reset & Personnel Counseled

ML20003D606
Person / Time
Site:	Brunswick
Issue date:	03/18/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20003D604	List: 05000325/LER-1981-031, Forwards LER 81-031/01T-0 05000325/LER-1981-031-01, /01T-0:on 810220,control Room Received Annunciator That Reactor Core Isolation Cooling Sys Turbine Tripped. Caused by Operator Tripping Turbine W/O Consent While Making Demonstration.Turbine Reset & Personnel Counseled
References
LER-81-031-01T, LER-81-31-1T, NUDOCS 8103270767
Download: ML20003D606 (2)

LER-1981-031, /01T-0:on 810220,control Room Received Annunciator That Reactor Core Isolation Cooling Sys Turbine Tripped. Caused by Operator Tripping Turbine W/O Consent While Making Demonstration.Turbine Reset & Personnel Counseled

Event date:
Report date:
3251981031R01 - NRC Website

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68 69 EV ENT DATE T4 75 REPORT OATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCEC h F III lDurine normai ninnt creration. an RCIC System " turbine triered" annunciator was I

o 3 l received in the Control Room. An investigation determined that the RCIC turbine had l l tripped and could not be reset from the Control Room. The RCIC System was declared l

o 4 ITTTl l inoperable. At the time of this event, the HPCI System was undergoing periodic l

l maintenance and was unavailable for service. This event did not affect the health or 1 0 6 I

0 7 l safety of the public.

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lTl1l4l7lg 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS the consent of the l Xn auxiliary operator manually tripped the RCIC turbine without i o l Control Ooerator while demonstrating to another employee how to reset a RClC turbine i i The turbine was reset and the RCIC System restored to 1 mechanical overspeed trip.

i 7 All operations personnel have been counseled concerning this event with ;

i 3 l operability.

l I particular emphasis on good plant communications.

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8 9 iO M. J. Pastva, Jr.

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PHONE:

NAME OF PREPARER 81os210 767

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.o LER A'ITACHMENT - RO # 1-81-31 Facility: BSEP Unit No.1 Event Date: 2-20-81 This event occurred when an auxiliary operator, who was unaware of the ongoing plant conditions, performed an unauthorized mechanical overspeed trip test of the RCIC System turbine without the consent of the unit Control Operator.

Technical specifications require that the HPCI System remain operable when the RCIC System is unavailable for service. At the time of this event, the HPCI System was under clearance to allow required calibration of HPCI components.

Upon the receipt of the " turbine tripped" alarm annunciator for the RCIC System, the Control Operator centacted the auxiliary operator who was at the time attempting to reset the trip signal. The manual trip must be reset locally.

After approximately 15 minutes, the trip signal was reset by a Senior Control Operator who was dispatched to the RCIC turbine to assist in resetting the turbine. As a result of this event, the involved auxiliary operator has been disqualified from making routine surveillance in the Reactor Buildings of both units.

Following this event, all operations personnel were lectured on the importance of knowing current plant operating conditions and communicating to one another any changes in plant systems' operability that might affect the overall plant condition. In addition, all plant operations personnel were instructed not to conduct unauthorized testing on any plant system.

An auxiliary operator training program is being developed at the Brunswick site by a former BSEP Shift Operating Supervisor.

This program will include classroom time as well as plant walk-throughs and equipment operation.

This LER will be reviewed by all operations personnel with emphasis on the need to obtain the permission of the Control Operator when performing plant evolutions.

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