The European Space Agency (ESA) has awarded a contract to Belgium’s Tractebel to evaluate the possibility of producing plutonium 238 (Pu-238), the nuclear fuel used for space exploration. The fuel powers nuclear batteries known as radioisotope thermoelectric generators (RTGs) and radioisotope heater units (RHUs) that are vital to providing spacecrafts and astronauts with electricity and heat where the sun does not shine. It could be used for the European Lunar Lander to explore the moon. The lander is expected be launched by the end of the decade
Tractebel said on 30 August that, with its partners ORANO and SCK CEN, it will study the possibility of manufacturing Pu-238 by bombarding neptunium-237 from the La Hague recycling facility in France with the neutron flux of the BR2 research reactor in Mol, Belgium.
Nuclear batteries (RTGs and RHUs) are a proven technology for space exploration. However, producing plutonium 238 is complex and costly, and for the time being only the USA and Russia have the capability. Our engineers will develop a roadmap for the creation of a Pu-238 production chain in Europe that will include a timeline and estimated production capacity and costs. They will also evaluate regulatory acceptance, Tractebel said.
Europe is participating in the Lunar “Gateway” programme led by NASA. The Gateway is a planned small space station in lunar orbit that will serve as a staging point to send astronauts to Mars. In the framework of the program, ESA is manufacturing the European Large Logistic Lander (EL3) to land on the moon, giving Europe access to the lunar surface. Once on the moon, the EL3 equipment may need to survive the lunar night that lasts up to two weeks. It is an opportunity for Europe to develop its own alternative to solar power for space exploration, including nuclear batteries using radioisotope power and heat.
Photo: EL3 (Credit:© ESA)