The Department of the Navy intends to award a sole source firm-fixed-price purchase order to the University of California, San Diego for radiological support testing of RADIAC detectors and systems using gamma and neutron sources. The contractor must be approved under the RADIAC Test Plan and be local to San Diego County, California, where the services will be performed. Testing activities include standard acceptance testing and system testing for algorithm performance and concept development. Comments or questions must be submitted by 12 June 2026, 12 PM Pacific Time. No budget amount is specified.