b'U.S. DEPARTMENT OF ENERGY| Office of Nuclear EnergyOffice of Nuclear Energy Facilities,Operations, and SecurityIDAHO FACILITIESIn March 2023, ATR operationsbased on the limited experience of the MANAGEMENT HIGHLIGHTS: completed the ATR CIC VI outage. Incontractors operations staff. DOE-April 2023, ATR completed post-CICID completed targeted oversight of Completed the ATR CIC VInuclear testing and resumed thermalcritical steps in the reactor startup outage and returned ATR toirradiation operations with Cycleand the nuclear testing plan over an full power operation 171A-1. The CIC-VI outage included theextended period that included several most-extensive outage scope to datebackshifts. This oversight validated MFC and IEC removed SNFon the ATR, completing major activitiesthe safe operation of the reactor to from underwater basinsuch as replacing ATRs berylliumensure that ATR would be able to storage 9 months ahead ofcore internals and installing a newsafely support a wide range of vital schedule top head-closure plate supportingmissions for the U.S. Navy and DOE-NE, Shipped more than 3,500I-Loop capabilities. This sets up ATR forand it supported university research fuel bottles of sodium- 1015 years of performing materialsand nuclear industries in the U.S. and bonded Experimentaltesting irradiations in support of Navalaround the world.Breeder Reactor II (EBR-II)Reactors and National Scientific User Facility sponsors. MFC production facility personnel, in driver SNF to MFC close coordination with IEC personnel, Completed 11 Mark IVFollowing the completion of the ATRachieved completion of the 1995 electro refiner batch runsCIC, DOE-ID recognized the need toIdaho Settlement Agreement (ISA) in the Fuel Conditioningperform enhanced federal oversight ofmilestone to remove SNF from Facility (FCF) the reactor startup and nuclear testingunderwater-basin storage 9 months to validate the core configuration,ahead of the December 31, 2023, Created 400 kg of HALEUin regulus formCompleted the longest ATR irradiation cycle65 daysduring Cycle 171B-1Reactor top head installation during CIC-VI A rare view of the ATR core during Phase 2 of CIC-VI, just before reinstalling vessel top head22'