CX-270163: Advanced Test Reactor (ATR) Loop Pump and Ancillary Equipment Replacement

The proposed action would replace the aged ATR loop pumps in four of the five Naval Reactors (NR) flowing water test loops. The loops are designed to test reactor fuel, poison, and structural material for NR. The test loops are aging and require recapitalization to continue operation and support the continuing NR need for irradiation test data. NR replaced pumps in one standard loop cell (1CWest) in 2006 with commercially fabricated canned motor pumps. A preliminary design has been completed to replace the pumps in the remaining three standard inpile tube (SIPT) loops and the single large inpile tube (LIPT) loop. The three canned motor pumps in each SIPT loop would be replaced with three new canned motor pumps. The eight canned motor pumps in the LIPT loop would be replaced with four new canned motor pumps. Pump replacement would include installation of new variable frequency drives (VFD) located outside the test loop cells.