Radiological and Nuclear Defense Modernization System Development and Demonstration

The Radiological and Nuclear Defense Modernization System Development and Demonstration (PE 0605755D8Z) program, managed by the Office of the Secretary of Defense, is focused on advancing the Department of Defense's (DoD) capabilities to deter, detect, and respond to radiological and nuclear (R/N) threats. The primary objective of this program element is to modernize and field R/N detection and identification technologies that enable the Joint Force and National Guard Bureau to operate effectively in R/N-contaminated environments, both domestically and abroad. This effort aligns with the Interim National Defense Strategy and the Department's priorities to rebuild military readiness and reestablish deterrence, particularly in the face of increasingly nuclear-capable adversaries.

The program's principal initiative, managed by the Office of the Under Secretary of Defense for Acquisition and Sustainment (OUSD(A&S)), aims to close critical warfighter capability gaps by fielding modernized, networked R/N detection, indication, and identification systems. These systems are designed to replace aging equipment, enhance operational resilience, and ensure that the Joint Force can withstand, operate through, and recover from R/N events. The program also supports integrated layered deterrence by collaborating with state, local, and federal agencies to prepare for and respond to nuclear or radiological emergencies.

A key goal of the program is to accelerate the transition of advanced technologies from research to operational use. The initiative leverages prior science and technology investments from the DoD, other federal agencies, and industry, focusing on the maturation of prototypes, integration of new systems and components, and rigorous developmental, environmental, and operational testing. This approach is intended to deliver new fielded capabilities within one to three years, directly addressing validated operational needs of the Joint Force and National Guard Bureau.

For FY 2026, the program will support the advanced development of several specific technologies: a hands-free, clandestine radiation detection system; an underwater x-ray radiography system; new detection systems utilizing cadmium zinc telluride (CZT) instead of high purity germanium detectors; drop/leave behind sensors; environmental testing for dismounted radiation sensors; R/N detection capabilities for GPS-denied environments; and phase ratio calibration for global nuclear detection monitors. These projects are intended to reduce mission and force risk by ensuring efficient, reliable field detection systems that can rapidly identify and alert personnel to radiation hazards.

The low profile radiation sensor system and the underwater x-ray radiography system are two notable sub-projects. The low profile sensor, developed with Tac-Alert in Texas, aims to provide discreet, hands-free radiation detection for personnel operating in high-threat environments. The underwater x-ray system, developed with Oak Ridge National Laboratory, is intended to enhance detection and identification of radiological materials in maritime and submerged settings, addressing a critical gap in current capabilities.

Other significant efforts include environmental testing for dismounted radiation sensors, conducted with NIWC-PAC in California, which ensures that portable sensors remain effective in diverse operational conditions. The R/N detector for GPS denied environments, developed with Draper Labs in Massachusetts, seeks to maintain detection and reporting capabilities when GPS is unavailable or compromised. The phase ratio calibration for global nuclear detection monitors project will improve the accuracy and reliability of global monitoring networks, supporting both national and allied early warning systems.

This line item is the only BA5 funding in the Department dedicated to providing improved R/N capability to the warfighter. The program funds labor, materials, and travel for both government and contracted personnel, supporting a range of research, development, testing, evaluation, and fielding activities. By focusing on rapid prototyping, integration, and transition of advanced detection technologies, the program aims to ensure that the DoD maintains a technological edge in radiological and nuclear defense, thereby strengthening deterrence and enhancing operational resilience across the spectrum of conflict.