Categorical Exclusion Determination
Office of NEPA Policy and Compliance
September 24, 2015
Estimated Read Time min
The Plant Protective System (PPS) Battery Room Exhaust Fans 670-HVE-1538 and 1539, located on the Test Reactor Area (TRA)-670 diesel generator room, have reached the end of their useful life and replacement parts are obsolete. The fans provide ventilation to maintain hydrogen gases below National Fire Protection Association lower explosive limit concentrations in the battery rooms. The proposed action would install a new exhaust fan system and modify the PPS battery room heating system to maintain battery electrolyte temperatures at required temperatures. To maintain PPS battery room fire rating, the battery room man-doors need to be replaced with new fire rated man-doors and fire rated door dampers/registers. In addition, a volume controllable fire damper would be installed in the room exhaust duct. The new fan system would be installed on the PPS battery room roof and would require installation of fall protection railing and equipment service platforms.