ML20236T932

Special Rept:On 870831,Train a Safety Injection Occurred During Performance of Bimonthly Surveillance of solid-state Protection Sys.Caused by Cognitive Personnel Error.Emergency Procedure 2BEP-0 Entered & Exited When Plant Stabilized

ML20236T932
Person / Time
Site:	Byron, Comanche Peak
Issue date:	10/27/1987
From:	Querio R COMMONWEALTH EDISON CO.
To:	Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
BYRON-87-1045, NUDOCS 8712020175
Download: ML20236T932 (1)

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• 4450 North German Church Rord PRIORITY ROUTIllG Byron, Illinois 61010 q est lpd p

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-October 27, 1987

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,w (ILfhd2 LTR: BYRON 87-1045 Mr. A. Bert Davis Regional Administrator >l Region 3 U.S. Nuclear Regulatory Commission

, 799 Roosevelt Road Glenn Ellyn, Illinois 60137 l

Dear Sir:

l l This report is being submitted in accordance withvByrdrEStation Unit 2' I

Operating License, NPF-60, Appendix A, Technical Specification.3.S.3 Action C.

l This report addresses a Train A Safety Injection on Unit 2 during a performance of a Solid State Protection System Bi-Monthly surveillance.

On August 31, 1987, while in Hot Standby, Unit 2 shift personnel were performing a Bi-Monthly Surveillance of the Solid State Protection System.

The Train A Output Cabinet Mode Selector Switch was not placed in the test position, resulting in a Train A Safety Injection. .The.cause for this event j was cognitive personnel error by not placing the Mode Selector switch in test. High head injection occurred through valve 2SI8801A, pressurizer level increased from twenty-five.to forty percent and RCS pressure increased from l three hundred forty five to three hundred fifty five pounds.

l Emergency procedure 2BEP-0 was entered upon receiving the Safety Injection signal and exited when plant conditions.were stabilized. Licensing Event Report (LER) 87-016-00; Docket No. 50-455 also covers this event.

l This is the first safety injection that has occurred-on Byron Unit Two. ,

l R. E. Querio '!

Station Manager Byron Nuclear Power Station REQ /RC/bf (0064z)

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cc: P. Brockman, NRC Senior Resident Inspector U. S..NRC Document Control Desk, Washington D.C.

INPO Record Center CECO Distribution List .

R. Williams J. Cook

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