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Ashley Mossa Westinghouse PRA Engineer

Main Control Room Evacuation for a Postulated Fire in a Nuclear Power Plant Control Room – An FDS Simulation. Ashley Mossa Westinghouse PRA Engineer. Nuclear 411. Fire Protection has been a “hot” topic since the Browns Ferry Fire in 1975

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Ashley Mossa Westinghouse PRA Engineer

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  1. Main Control Room Evacuation for a Postulated Fire in a Nuclear Power Plant Control Room – An FDS Simulation Ashley Mossa Westinghouse PRA Engineer

  2. Nuclear 411 • Fire Protection has been a “hot” topic since the Browns Ferry Fire in 1975 • The Main Control Room (MCR) contains instrumentation & control for virtually all plant equipment and is used to shut down the plant • An alternate shutdown panel can be used in case of MCR evacuation • An industry move to a new fire protection program NFPA 805 is costing NPPs millions of dollars in analyses and plant modifications.

  3. Typical MCR

  4. Importance of the MCR • Redundancy & diversity throughout the plant • However MCR is where all instrumentation and controls come together.

  5. Problem Statement • Determine, for a variety of fire sizes, when operators must abandon the control room due to habitability concerns. • Temperature • Heat Flux • Optical Density • Using the data above, determine the probability of operators leaving the control room

  6. Project Steps • Understand FDS • Build FDS Code • Run for a variety of fire sizes & conditions • Analyze results • Determine the probability of operators abandoning the MCR for the ASP

  7. Results for Non-Ventilated Case • Non-vented fires of 400kW or less did not require MCR abandonment

  8. Questions?

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