CX-020159: Replace Main Side Diesel Generator - 234-H

The scope of this task will replace the diesel engine and generator and consolidate and/or replace the existing 4 Motor Control Centers (MCCs) in Room 22 of Building 234-H. Three of the new MCC will be powered by the backup diesel power system (EEP) along with normal electrical power. One new MCC will provide normal power only to main side loads. Three new automatic transfer switches (ATSs) will be required for the new Diesel Generator set and will sequence the restart loads for the main side and addition side exhaust fans. This task includes rerouting the power and controls for the addition side exhaust fans from the addition side normal power and backup diesel generator power to the main side normal power and main side backup diesel generator power. Supply fans will not require backup power. These modification will dismantle and remove (D&R) of the existing main side diesel generator and associated equipment as well as the addition side diesel generator and associated equipment. Other D&R work includes abandoned and obsolete electrical equipment in Room 22 of 234-H to provide space for new MCCs and ATSs. The existing 234-H instrument air compressors will be removed and replaced also. A larger receiver tank will be installed for Instrument Air serving 234-H and 234-7H. All addition side loads requiring backup power will now receive backup power from the main side diesel system.  Reconfiguring of the power system will not introduce any new hazards, nor increase the consequence of current hazards impacting the DSA.