05000416/LER-1984-018, Corrected LER 84-018-00:on 840414,shutdown Cooling Sys Isolation Occurred When Technician Lifted Wrong Lead During Performance of Monthly Surveillance.Technician Reprimanded, Lead Terminated & Shutdown Cooling Restored

Corrected LER 84-018-00:on 840414,shutdown Cooling Sys Isolation Occurred When Technician Lifted Wrong Lead During Performance of Monthly Surveillance.Technician Reprimanded, Lead Terminated & Shutdown Cooling Restored

ML20084P280
Person / Time
Site:	Grand Gulf
Issue date:	05/10/1984
From:	Byrd R, Dale L MISSISSIPPI POWER & LIGHT CO.
To:	NRC OFFICE OF ADMINISTRATION (ADM)
References
AECM-84-0272, AECM-84-272, LER-84-018-01, LER-84-18-1, NUDOCS 8405180083
Download: ML20084P280 (3)

LER-2084-018, Corrected LER 84-018-00:on 840414,shutdown Cooling Sys Isolation Occurred When Technician Lifted Wrong Lead During Performance of Monthly Surveillance.Technician Reprimanded, Lead Terminated & Shutdown Cooling Restored

Event date:
Report date:
4162084018R00 - NRC Website

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While performing a Reactor Water Cleanup System (RWCU) functional test, a technician lifted the wrong lead causing an isolation of Shutdown Cooling.

The error was immediately recognized, the lead was terminated and Shutdown Cooling was restored.

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0l0 0l2 0F 0 [2 rixT o s, . w w mac a assaw nn A Shutdown-Cooling System isolation occurred at 0208 hours0.00241 days <br />0.0578 hours <br />3.439153e-4 weeks <br />7.9144e-5 months <br /> on April 14, 1984, f when a utility technician lifted the wrong lead during performance of a monthly surveillance. The wire leads required to be lifted in the performance of certain tests were recently labeled to ensure the identification of the correct lead. The technician had identified the correct lead by examination  :

of the label. He was momentarily distracted however, and in relocating the 1ead chose the incorrect termination modulus. i The procedure instructed the technician to lift lead TB16 (+) to TM30, panel l 1H13-P713D. After identifying the correct lead, he looked away to obtain a  !

l screwdriver, he then proceeded to lif t the thermocouple lead TB16 (+) at TM29. '

The lifted lead caused the RHR A equipment area differential temperature  ;

switch to actuato. The technician immediately terminated the wire.

Operations then restored shutdown cooling to operation. ,

The technician was given a letter of reprimand for the error which was i contrary to the procedure. No hardware or procedural changes are considered necessary. This is submitted'as a final report. l l

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2 / r E MISSISSIPPI POWER & LIGHT COMPANY f Helping Build Mississippi P. O. BOX 1840. J ACKSON. MISSISSIPPI 39205 May 10, 1984

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Report Date on page 1 of the nuctaan encoucnow otrAnmcNT attachment was left blank--

Document Control Desk should have been 5/10/84. #

U. S. Nuclehr Regulatory Commission Washington, D. C. 20555 Gentlemen:

SUBJECT:

Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-13 File: 0260/L-835.0 Shutdown Cooling Isolation During Surveillance Testing LER 84-018-0 ,

AECM-84/0272 l Attached is Licensee Event Report (LER) 84-018-0 which is a final report.

Yours truly.

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L. F. Dale Manager of Nuclear Services EBS/SHH:rg Attachment cc: Mr. J. B. Richard (w/a)

Mr. R. B. McGehee (w/o)

Mr. N. S. Reynolds (w/o)

Mr. G. B. Taylor (w/o)

Mr. Richard C. DeYoung Director (w/a)

Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Mr. J. P. O'Reilly, Regional Administrator (w/a)

U. S. Nuclear Regulatory Commission Region 11 101 Marietta St., N.W., Suite 2900 Atlanta, Georgia 30303

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Member Middle South Utilities System

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