CX-270091: Warm Waste Effluent Radiation Monitor and Transfer Pump M-54 Recirculation Evaluation and Modification

The Effluent Radiation Monitor (ERM) in building Test Reactor Area (TRA)-605 at the Advanced Test Reactor (ATR) Complex experiences filter plugging after a short operating period. This restricts flow to the detector chamber and causes the pumps to shut off. Therefore, the ERM unit needs to be replaced. The unit currently pulls a side stream of representative liquid from the main flow and directs it through filters and then to a chamber where it is analyzed for radiation. New detectors would be installed so the process piping would route directly through the detector housing and monitor radiation levels without requiring any fluid being drawn from the waste stream. The proposed action would replace the ERM and associated pumps, filters, valves and detectors with new detectors and install a new discharge flow line from the M-54 Transfer pump to the warm waste tank.