The Board's staff was concerned that emergency lighting equipment is neither seismically qualified nor seismically supported. In the event of an earthquake, emergency light is needed for personnel egress from the facility. WSRC will evaluate this condition. Exhaust points in the battery room are now moved near the ceiling high enough to ensure complete hydrogen removal. Battery room exhaust now have loss of air flow alarms as required by ANSI C2, National Electrical Safety Code.
Calculations are available to support an assessment of battery room ventilation.
Two separate, fully redundant ventilation systems with power supply from separate distribution busses are provided for the central control room. However, flow instrumentation for both ventilation systems are receiving power from a single power distribution bus. WSRC has implemented a design modification that places the power feed for the flow instrumentation on separate redundant busses. DWPF utilizes greater than 500 Rosemount transmitters. Based on the lower service pressures and lower safety significance, however, WSRC does not believe that any action on the transmitter needs to be taken.