What would you do if you were 34 million miles from the next filling station or wall plug? Not to worry. The folks at the National Aeronautics and Space Administration (NASA) and the U.S. Department of Energy (DOE) have got your back. They are developing a suitcase-size nuclear power generator for use at manned or unmanned bases on the Moon, Mars and other planets.
What’s more, according to the project leader – who spoke at the National Meeting & Exposition of the American Chemical Society (ACS (News - Alert)) in Denver on August 28 – the nuclear power plant, itself, may look extraterrestrial!
But we’re not talking about Steven Spielberg’s ET . James E. Werner said, “People would never recognize the fission power system as a nuclear power reactor. The reactor, itself, may be about 1.5 feet wide by 2.5 feet high – about the size of a carry-on suitcase. There are no cooling towers. A fission power system is a compact, reliable, safe system that may be critical to the establishment of outposts or habitats on other planets. Fission power technology can be applied on Earth’s Moon, on Mars, or wherever NASA sees the need for continuous power.”
The NASA-DOE research and development team is scheduled to build a technology demonstration unit in 2012. Werner leads the DOE’s Idaho National Laboratory involvement in this effort, which includes participation in the reactor design and modeling teams; fuel development and fabrication; and development of a small electrical pump for the liquid metal cooled system.
Sunlight (News - Alert) and fuel cells have been the mainstays for generating electricity for space missions in the past, but engineers realized that solar energy has limitations. Solar cells do a great job supplying electricity in near-Earth orbits and for satellite-borne equipment, but nuclear power offers some unique capabilities that could support manned outposts on other planets or moons.
“The biggest difference between solar and nuclear reactors is that nuclear reactors can produce power in any environment,” Werner explained. “Fission power technology doesn’t rely on sunlight, making it able to produce large, steady amounts of power at night or in harsh environments, such as those found on the Moon or Mars.”
“A fission power system on the Moon could generate 40 kilowatts (kW) or more of electric power,” he said – approximately the same amount of energy needed to power eight houses on Earth. In addition, Werner said that a fission power system could operate in a variety of locations, including craters, canyons, or caves.
“The main point is that nuclear power has the ability to provide a power-rich environment to the astronauts or science packages anywhere in our solar system and that this technology is mature, affordable, and safe to use,” Werner said.
Fission power systems rely on energy generated from nuclear fission. Nuclear fission works by splitting uranium atoms to generate heat that is then converted into electric power. The primary components of a fission power system are similar to those found in the commercial reactors currently in use:
- A heat source,
- Power conversion,
- Heat rejection. and
- Power conditioning and distribution.
Werner added that, despite the similarities in components, fission power systems for space are different from commercial reactors in a number of ways. “While the physics are the same, the low power levels, control of the reactor, and the material used for neutron reflection back into the core are completely different,” he explained. “Weight is also a significant factor that must be minimized in a space reactor, which is not considered in a commercial reactor.”
Once the technology is developed and validated, it may prove to be one of the most affordable and versatile options for providing long-term base power for the space exploration programs.
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Cheryl Kaften is an accomplished communicator who has written for consumer and corporate audiences. She has worked extensively for MasterCard (News - Alert) Worldwide, Philip Morris USA (Altria), and KPMG, and has consulted for Estee Lauder and the Philadelphia Inquirer Newspapers. To read more of her articles, please visit her columnist page.Edited by
Jennifer Russell
