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Protecting Nuclear Weapons, Space Assets
by David Vergun, DOD News
September 22, 2021

The Defense Department relies on nuclear-armed bombers, submarines and intercontinental ballistic missiles, as well as space-based sensors, to provide a strategic deterrence umbrella for the homeland and to protect deployed forces, allies and partners.

However, sensitive microelectronics used in these assets could be vulnerable to high levels of ionizing radiation caused by a number of factors, including cosmic rays in outer space, severe solar storms, and an electromagnetic pulse caused by a high-altitude nuclear detonation.

To protect against these threats, the DOD has developed techniques to protect microelectronics used in satellites, spacecraft, the nuclear triad and the triad's command and control center, said Rich Ryan, director for international programs, nuclear forensics, resiliency and survivability in the office of the deputy assistant secretary of defense for nuclear matters.

This protection, known as hardening, can consist of manufacturing chips on insulated material, redundant circuits, altering the design of circuits, and placing a shield over the microelectronics, he said.

The International Space Station releases the Cygnus cargo vessel S.S. Katherine Johnson over southern Wyoming on June 30, 2021. (NASA photo)
The International Space Station releases the Cygnus cargo vessel S.S. Katherine Johnson over southern Wyoming on June 30, 2021. (NASA photo)

Each of the methods used undergoes rigorous radiation testing in military and government laboratories to ensure they work in hazardous conditions, he said.

In the past, there was no central repository for identifying and accessing parts that have been certified as radiation hardened, he said.

On Sept. 30, 2021 ... the DOD opened a parts library to serve the department and other agencies with requirements for radiation hardened parts, including NASA and the Department of Energy. The cloud-based library is hosted by Nimbis Services in Oro Valley, Arizona.

Known as the Trusted Silicon Stratus Distributed Transition Environment, the authority to operate this library was issued by the Strategic Radiation Hardened Electronics Council; the Air Force Research Laboratory at Wright Patterson Air Force Base, Ohio; and the Naval Surface Warfare Center Crane Division in Indiana.

"The authorization comes as a clarion call that in order to improve supply chain visibility across the nuclear enterprise, establishing this microelectronics library is key to improving the ability to analyze key parts, their sources, and to facilitate government re-use of intellectual property throughout the DOD," Ryan said.

A Falcon 9 rocket carrying SpaceX's Transporter-2 payload launches from Cape Canaveral Space Force Station, Florida on June 30, 2021. (U.S. Space Force photo by Airman 1st Class Dakota Raub)
A Falcon 9 rocket carrying SpaceX's Transporter-2 payload launches from Cape Canaveral Space Force Station, Florida on June 30, 2021. (U.S. Space Force photo by Airman 1st Class Dakota Raub)

The next step for the parts library is to test performance across DOD programs, he added.

"The parts library will enable closer Air Force, Navy and Missile Defense Agency collaboration on a variety of strategic system acquisition and sustainment programs — allowing them to better align requirements, technology development, production and sustainment efforts, and supply chain protection activities. By improving data-sharing and reducing duplication of effort, the library will drive affordability, advance technology, and reduce risk while protecting critical design information," said Drew Walter, deputy assistant secretary of defense for nuclear matters.

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