The Domestic Nuclear Detection Office (DNDO) has issued a Request for Information (RFI) seeking technical responses to determine if viable concepts exist for improving current generation Radiation Portal Monitors that are based on Polyvinyl Toluene (PVT) detectors. Responses are sought in two technical areas, with the first being investigating algorithms, such as Energy Windowing, that might increase Special Nuclear Material (SNM) radiation detection and Naturally Occurring Radioactive Materials (NORM) rejection capabilities. PVT based RPMs are limited in their ability to identify the energy level of gamma radiation, therefore can’t provide much information on the source of radiation such as cesium or uranium. Energy Windowing refers to being able to look at patterns of the radiation being given off by the PVTs and comparing the windows of one energy pattern to another to better determine if SNM or NORM is present. The second area is investigating technical concepts that could be used to improve the hardware systems performance and extend the 10-year service life. Sol. No. RFI-PVT_DNDO(FY10). Respond by July 9. Contact: Amar Medatia, contract specialist, [email protected].