05000298/LER-1979-032, Forwards LER 79-032/03L-0

Forwards LER 79-032/03L-0

ML19210F014
Person / Time
Site:	Cooper
Issue date:	11/21/1979
From:	Lessor L NEBRASKA PUBLIC POWER DISTRICT
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19210F015	List: 05000298/LER-1979-032, Forwards LER 79-032/03L-0 05000298/LER-1979-032-03, /03L-0:on 791026,during Normal Operation,Doors to HPCI & RHR B&D Pump Rooms Left Open W/O Fire Watch.Caused by Personnel Error.Occurrence Discussed W/Personnel Involved. Fire Doors Controlled by Procedure Posted W/Signs
References
CNSS-790599, NUDOCS 7912130391
Download: ML19210F014 (2)

LER-1979-032, Forwards LER 79-032/03L-0

Event date:
Report date:
2981979032R00 - NRC Website

text

e COOPER NUCLEAR STATION P.O. BOX 98, BRoWNVILLE, NEBR ASKA 68321 Nebraska Pubh.c Power Distnct TELE ~o~E m m.3.n CNSS790599 November 21, 1979 Mr. K. V. Seyfrit U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region IV 611 Ryan Plaza Suite 1000 Arlington, Texas 76011

Dear Sir:

This report is submitted in accordance with Section 6.7.2.B.3 of the Technical Specifications for Cooper Nuclear Station and discusses a reportable occurrence that was discovered en October 26, 1979. A li-censee event report form is also enclosed.

Report No.:

50-298-79-32 Report Date:

November 21, 1979 Occurrence Date: October 26, 1979 Facility:

Cooper Nuclear Station Brownville, Nebraska 68321 Identification of Occurrence:

An observed inadequacy in the implementation of an administative or procedural control required by Technical Specification 3.19.A.

Conditions Prior to Occurrence:

The reactor was at steady state power level of approximately 99% of rated thermal power.

Description of Occurrence:

Technical Specification 3.19A was not met.

While working on pipe hanger modifications in the High Pressure Coolant Injection (HPCI) and Residual Heat Removal (RHR) "B"

& "D" pump rooms, the fire doors to the stairway were left open and no fire watch was established.

Designation of Apparent Cause of Occurrence:

Mechanical maintenance personnel error in leaving the rooms without closing the doors.

1552 252 hool 5

//

'9131se 39)

Mr. K. V. Seyfrit November 21, 1979 Page 2.

Analysis of Occurrence:

The reinforced concrete wall and doors between the HPCI and RHR "B"

& "D" pump rooms and the stairway form a l's hour rated fire bar-rier.

In case of a fire in one room with the door open, smoke and flame could enter the stairway making it more difficult to exting-uish the fire. A fire in either room would probably be detected by the temperature sensors in steam leak detection alerting the control room operator of a problem or by operator observation.

This occurrence presented no adverse affect upon public health and safety.

Corrective Action

The open doors were immediately closed.

This occurrence has been discussed directly with the personnel involved in leaving the doors open. A copy of this LER will be routed to all mechanical main-tenance personnel.

Additionally, all fire doors controlled by Administrative Procedure 1.4.16 have been identified with a sign on each side of the door.

Sincerely, M

L. C. Lessor Station Superintendent Cooper Nuclear Station LCL:cg 9 }

Attach.

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