05000282/LER-1993-002, :on 921129,fire Door Between CR & Records Room & Fire Door Between CR & Operators Study Area Blocked Open to Provide Cooling.No Compensatory Measures Taken.Doors Closed & Administrative Procedures Revised

:on 921129,fire Door Between CR & Records Room & Fire Door Between CR & Operators Study Area Blocked Open to Provide Cooling.No Compensatory Measures Taken.Doors Closed & Administrative Procedures Revised

ML20128F205
Person / Time
Site:	Prairie Island
Issue date:	02/04/1993
From:	Hunstad A NORTHERN STATES POWER CO.
To:
Shared Package
ML20128F202	List: 05000282/LER-1993-002, :on 921129,fire Door Between CR & Records Room & Fire Door Between CR & Operators Study Area Blocked Open to Provide Cooling.No Compensatory Measures Taken.Doors Closed & Administrative Procedures Revised
References
LER-93-002, LER-93-2, NUDOCS 9302110297
Download: ML20128F205 (3)

LER-1993-002, on 921129,fire Door Between CR & Records Room & Fire Door Between CR & Operators Study Area Blocked Open to Provide Cooling.No Compensatory Measures Taken.Doors Closed & Administrative Procedures Revised

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(1)
2821993002R00 - NRC Website

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On November 29, 1992, both units were at cold shutdown.

The fire door between the Control Room and the Records Room, and the fire door between'the Control Room and the operators' Study Area, had been blocked open to provide some cooling for those rooms while their normal cooling system was out of service due to cooling water header replacement.

No compensatory measures had been j.

taken; it was believed that since the Control Room side of the fire doors is l

continuously occupied, a fire watch was unnecessary, 1

Further discussions with NRC-resulted ir. the conclusion that opening the doors made them inoperable and that a violation of Technical l

Specification 3.14.G.2 had occurred. The doors were closed and the fire barriers considered operable.

Administrative procedures have been revised to include specific instructions on establishing fire watches for the doors.

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rww-ou nwna.a..mm m..,mcw ason EVENT DESCRIPTIQH On November 29, 1992, both units were at cold shutdown.

The fire door.between the Control Room and the Records Room, and the fire door between the Control Room and the operators' Study Area, had been blocked open to provide some cooling for those rooms while their normal cooling system was out of service due to cooling water header replacement. ho compensatory measures had t en taken; it was believed that since the Control Room side of the fire doors is continuously occupied, a fire watch was unnecessary.

On December 2, 1992, the NRC resident inspector observed that the doors were-blocked open and determined that no administrative controls were in place to-control the door.s.

The resident inspector discussed the event with members of plant management, and he believed that plant management understood that a Technical Specification violation had occurred and that an LER was necessary.

Plant management came away from that discussion with a different understanding, that no Technical Specification violation had occurred and that no LER was necessary, based on continuous-staffing of the Control Room.

The event was discussed among p19nt staff over the next few weeks, during which time steps were taken to implement administrative controls for the doors. At the January 5,1993, exit meeting with the resident inspectors, it was stated that one violation-would be cited for not controlling the doors properly, and another would be cited for not reporting the' Technical.

Specification violation as an LER.

CAUSE OF THE EVENT

Cause of the event is a difference in interpretation of Technical Specifications regarding operability of a fire barrier, one side of.which is continuously occupied.

The plant position had always been that opening of the doors to the Records Room and to the operators' Study Area room does not make the fire barriers inoperable and, therefore, the Limiting Condition for Operation of Technical Specification 3.14 G.2 need not be entered for the

'following reasons:

1) The Control Room is continuously occupied.

2) The Records Room and Study Area room are usually occupied.

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3) Fire detection systems on both sides of the fire barriers are operable.

4) The Records Room is protected by a wet pipe sprinkler system.

On January 5,1993, it was determined that opening these fire doors maken tham-inoperable and the Limiting condition for Operation of Technical Specification 3.14,0.2 should be entered when these doors are open.

ANALYSIS OF THE EVENT

This event is reportable pursuant to 10CFR50.73(a)(2)(1)(B) because Technical Specification 3.14.G.2 was violated. This violation had low safety significance because the control room is required to be cor.tinuously occupied, the rooms on the other side of the barriers are usually occupied, And fire detectors are available on both sides of the barriers. Also, the Records Room is protected by a wet pipe sprinkler system. Health and safety of the public were unaffected.

CORRECTIVE ACTION

The doors were closed and the fire barriers considered operanle, i

l Administrative procedures have been revised to include specific instructions.

i on establishing fire watches for the doors.

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Signs have been placed on the doors which reference at.plicable Technical Specifications and administrative procedures.

FAILED COMPONENT IDENTIFICATIO_H None.

PREVIOUS SIMILAR EVENTS

One other event involving a fire door was reported as Unit 1 LER_92-001, but its cause was not similar.

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