05000325/LER-1980-067-03, /03L-0:on 800822,while Withdrawing Control Rods During Startup,Erroneous Rod Blocks Were Received from Rod Worth Minimizer.Also,Plant Process Computer Printed Notch Errors While None Existed.Cause Not Determined

/03L-0:on 800822,while Withdrawing Control Rods During Startup,Erroneous Rod Blocks Were Received from Rod Worth Minimizer.Also,Plant Process Computer Printed Notch Errors While None Existed.Cause Not Determined

ML19338D746
Person / Time
Site:	Brunswick
Issue date:	09/16/1980
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19338D737	List: 05000325/LER-1980-067, Forwards LER 80-067/03L-0 05000325/LER-1980-067-03, /03L-0:on 800822,while Withdrawing Control Rods During Startup,Erroneous Rod Blocks Were Received from Rod Worth Minimizer.Also,Plant Process Computer Printed Notch Errors While None Existed.Cause Not Determined
References
LER-80-067-03L, LER-80-67-3L, NUDOCS 8009230717
Download: ML19338D746 (2)

LER-1980-067, /03L-0:on 800822,while Withdrawing Control Rods During Startup,Erroneous Rod Blocks Were Received from Rod Worth Minimizer.Also,Plant Process Computer Printed Notch Errors While None Existed.Cause Not Determined

Event date:
Report date:
3251980067R03 - NRC Website

text

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(,) EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h ITTT1 i While withdrawing control rods during a normal reactor startup following a routine l

gl refueling outage, erroneous rod blocks were received from the rod worth minimizer (RW!!)l lo;4ll with both the rod insert and withdraw lights lit between rod pull groups 18 and 30.

l j'T]T] l In addition, the plant process computer printed notch errors although none existed.

l o e l This event did not affect the health or safety of the public.

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,,,,,l successfully. Numerous attempts made to duplicate the conditions leading to the l

] event failed to yield any definite conclusions.

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l the cause of the event is in progress and a supplemental report will follow.

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PHONE:

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8009230 717