Intent to Award Sole Source - RSX-1 Radiation Detector

This Minimum Requirements Document outlines a procurement request by the USAF School of Aerospace Medicine, Occupational and Environmental Health (USAFSAM/OEC) for one RSX-1 Sodium Iodide (NaI(Tl)) Radiation Detector. The primary objective of this acquisition is to pair the new detector with an existing RSX-1 unit to establish a networked, two-detector sensor array. This tandem configuration will enable personnel to quickly and precisely triangulate the direction and origin of radioactive contamination, improving operational efficiency and minimizing radiation exposure risk during Health Risk Assessments. To ensure seamless integration and interoperability with the current system, the requested detector must match the exact physical dimensions (4" x 4" x 16") and specifications of the RSX-1 model. Key technical requirements include a minimum 4.0-liter active detection volume, energy resolution under 8.5%, an energy range of 20 keV to 3.0 MeV, and automatic multi-peak gain stabilization without external radioactive sources. Additionally, the system must feature integrated digital signal processing capable of handling high count rates up to 250,000 counts per second. Physically, the unit must be housed in a ruggedized, weather-sealed enclosure suitable for harsh vehicle or aviation environments, weigh under 25 kg, and operate reliably in extreme temperatures ranging from -30°C to +45°C. Deliverables include the detector assembly, calibration certificates, and integration documentation.

This Determination and Findings document justifies a sole-source procurement by the Air Force Research Laboratory (AFRL/RMZB) for one RSX-1 Sodium Iodide Radiation Detector from Radiation Solutions Inc. The USAF School of Aerospace Medicine, Occupational and Environmental Health (USAFSAM/OEC) requires the 4"x4"x16" detector to conduct Health Risk Assessments and protect personnel from ionizing radiation. USAFSAM/OEC currently operates a single RSX-1 unit, which cannot independently determine the direction of a radiation source. Acquiring a second, identical RSX-1 unit will create a networked sensor system, allowing personnel to triangulate and pinpoint radiation sources quickly and precisely. To ensure seamless integration and achieve the required directional functionality, the new detector must match the exact model and dimensions of the existing unit. Radiation Solutions Inc. is the sole manufacturer and distributor of the RSX-1 detector and its accessories, with no other authorized suppliers. Consequently, the Contracting Officer has determined that a sole-source acquisition is justified under applicable federal regulations.