ML16341C521

7 to Updated Final Safety Analysis Report, Chapter 9, Table 9.10-1, Control Room Ventilation System Malfunction Analysis

ML16341C521
Person / Time
Site:	Cook
Issue date:	10/24/2016
From:	Indiana Michigan Power Co
To:	Office of Nuclear Reactor Regulation
Shared Package
ML16336A263	List: AEP-NRC-2016-42, Fire Protection Program Change Summary ML16336A225 ML16336A228 ML16336A238 ML16336A291 ML16336A292 ML16336A294 ML16336A295 ML16336A297 ML16336A298 ML16336A299 ML16336A300 ML16336A301 ML16336A302 ML16336A303 ML16336A304 ML16336A305 ML16336A306 ML16336A308 ML16336A309 ML16336A310 ML16336A311 ML16336A312 ML16336A313 ML16336A314 ML16336A315 ML16336A316 ML16336A317 ML16336A318 ML16336A319 ML16336A320 ML16336A322 ML16336A323 ML16336A324 ML16336A325 ML16336A327 ML16336A328 ML16336A329 ML16336A330 ML16336A332 ML16336A333 ML16336A334 ML16336A336 ML16336A337 ML16336A338 ML16336A339 ML16336A340 ML16336A341 ML16336A342 ML16336A345 ... further results
References
AEP-NRC-2016-42
Download: ML16341C521 (1)

Text

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23 Table:

9.10-1 Page:

1 of 1 CONTROL ROOM VENTILATION SYSTEM MALFUNCTION ANALYSIS COMPONENT MALFUNCTION COMMENTS AND CONSEQUENCES

1.

Normal Intake Dampers Failure to close Two dampers in series ensure isolation of outside air normal intake.

Failure to open Parallel dampers ensure outside air intake opens.

2.

Pressurization/Cleanup Intake Dampers Fully open or multiple dampers open One damper partially open is correct alignment. A single failure may result in one damper fully open or 2 dampers partially open. Other failures are not considered credible.

3.

Pressurization/Cleanup Recirculation Damper Failed to closed position All air flowing through the filter is from the intake and air cleanup is limited to a single pass. Control Room dose consequences may increase. The position of the recirculation damper is administratively controlled so it does not need to change position in response to a radiological accident.