Credit: U.S. Department of Energy - Accident Recovery (November 1961) - Description of the 1959 SRE core damage accident and the procedures used to remove damaged fuel and refurbish the SRE for continued operation

Atomics International SNAP-10A Program
From Wikipedia, the free encyclopedia https://en.wikipedia.org/wiki/SNAP-10A
Sodium Reactor Experiment
https://en.wikipedia.org/wiki/Sodium_...

SNAP-10A was an experimental nuclear reactor launched into space in 1965. The Systems Nuclear Auxiliary Power Program (SNAP) reactor was developed under the SNAPSHOT program overseen by the U.S. Atomic Energy Commission.

Atomics International, then a division of North American Aviation was the prime contractor for the SNAP-10A development. Most of the systems development and reactor testing was conducted at the Santa Susana Field Laboratory, Ventura County, California using a number of specialized facilities. A United States Department of Energy video depicting the development and fabrication of the SNAP-10A is available.

The company also developed and tested other compact nuclear reactors including the SNAP Experimental Reactor (SER), SNAP-2, SNAP-8 Developmental Reactor (SNAP8-DR) and SNAP-8 Experimental Reactor (SNAP-8ER) units at the Santa Susana Field Laboratory. Atomics International also built and operated the Sodium Reactor Experiment, the first U.S. nuclear power plant to supply electricity to a public power system.

The testing and development involving radioactive materials caused environmental contamination at the former Atomics International Santa Susana Field Laboratory (SSFL) facilities. The United States Department of Energy is responsible for the identification and cleanup of the radioactive contamination. (The SSFL was also used for the unrelated testing and development of rocket engines by Rocketdyne primarily for NASA.) The DOE website supporting the site cleanup details the historical development of nuclear energy at SSFL including additional SNAP testing and development information.