Dynamic radioisotope power system development for NASA missions

April 21, 2023, 3:19PMNuclear NewsSal Oriti, Ernestina Wozniak, and Max Yang
The multimission radioisotope thermoelectric generator for NASA’s Mars 2020 Perseverance rover is tested at NASA’s Kennedy Space Center in 2020. The choice of an MMRTG as the rover’s power system gave mission planners significantly more flexibility in selecting the rover’s landing site and in planning its surface operations. (Photo: NASA)

Under the Radioisotope Power Systems Program, NASA and the Department of Energy have been advancing a novel radioisotope power system (RPS) based on dynamic energy conversion. This approach will manifest a dynamic RPS (DRPS) option with a conversion efficiency at least three times greater than a thermoelectric-based RPS. Significant progress has recently been made toward this end. A one-year system design phase has been completed by NASA industry partner Aerojet Rocketdyne, which resulted in a DRPS with power of 300 watts-electric (We) with convertor-level redundancy. In-house technology development at the NASA Glenn Research Center (GRC) has demonstrated the conversion devices in relevant environments and has shown all requirements can be met. Progress has also been made on the control electronics necessary for dynamic energy conversion. Flight-like controllers were recently upgraded and achieved an 11-percentage-point increase in efficiency. Control architectures have been developed to handle the multiconvertor arrangements in the latest DRPS design. A system-level DRPS testbed is currently being assembled that will experimentally demonstrate the DRPS concept being pursued.

To continue reading, log in or create a free account!

Related Articles

Buyers Guide celebrates 55 years

March 15, 2024, 7:00AMNuclear News

The newest edition of the Nuclear News Buyers Guide will be out soon, marking the 55th year of the most comprehensive goods and services publication in the nuclear industry. The American...

2023 in Review: January–March

January 10, 2024, 9:32AMNuclear News

Another calendar year has passed. Before heading too far into 2024, let’s look back at what happened in 2023 in the nuclear community. In today's post, compiled from Nuclear News and Nuclear...

Young Members Group shines at YPC

January 9, 2024, 4:48PMNuclear News

A big thank-you to the American Nuclear Society Young Members Group for all it accomplished at the Young Professionals Congress (YPC) and President’s Special Session at the 2023 ANS Winter...

The Carolinas-Virginia Tube Reactor

December 22, 2023, 3:00PMNuclear NewsJeremy Hampshire

The Carolinas-Virginia Tube Reactor (CVTR), also known as Parr due to its location in Parr, S.C., was a 65-MWt (17-MWe) pressurized tube reactor. Construction began in January 1960, and the...

Eisenhower’s “Atoms for Peace” at 70

December 8, 2023, 3:03PMNuclear News

Seventy years ago to the day, President Dwight D. Eisenhower gave his historic address to the United Nations General Assembly in New York City. (See December 2023 Nuclear News's “Leaders”...