Research on RPS
Tractebel will conduct research on dynamic radioisotope power systems (RPS) fueled by plutonium 238 (Pu-238) for space applications. RPS are vital to providing spacecrafts and astronauts with electricity and heat where the sun does not supply sufficient power. They use the heat from the natural radioactive decay of PU-238 to produce electric power. The project will be funded by the Euratom Research and Training Program (2021-2025), a complementary funding programme to Horizon Europe covering nuclear research and innovation.
Tractebel will research dynamic radioisotope power systems (RPS) to power space missions where the sun does not supply sufficient power
European space missions
The PULSAR project brings together leading stakeholders in the fields of aerospace and nuclear within a consortium led by Tractebel. The consortium includes the Joint Research Centre (JRC) of the European Commission, the Belgian Nuclear Research Centre, SCK CEN, the French Alternative Energies and Atomic Energy Commission, CEA, INCOTEC, ArianeGroup, Airbus Defense and Space, the University of Bourgogne Franche Comté and Arttic. Each partner will bring state-of-the-art expertise in its respective field, to contribute to the success of this Europe-wide project.
Current nuclear batteries, the so-called radioisotope thermoelectric generators (RTGs), have low conversion efficiencies. This means that substantial amounts of fuel and large RTGs are needed to power missions, which increases the weight to be launched by the space rocket, adversely affecting rocket payload capability. The project aims to address the issue in two ways. It aims to further develop technology and capabilities in Europe to produce Pu-238 to fuel radioisotope power systems (RPS). Its second objective is to significantly increase the efficiency of the RPS thanks to an advanced Stirling engine.
Neither Pu-238 nor RPS are currently manufactured on European soil. As space has become a strategic and economic priority for Europe, Europe’s dependence on other countries in the fields of energy and aerospace is a major concern. PULSAR is a step forward for Europe to become an autonomous global leader in space exploration, Tractabel explains.
The PULSAR project is a step forward for Europe to become an autonomous global leader in space exploration
Beyond space exploration
The technology could be used to explore the moon and Mars. It could also help establish a permanent base on the moon, the so-called “Moon Village” promoted by ESA. Moreover, the technology has applications beyond space exploration. The RPS could be easily adapted to provide power in challenging environments on earth such as in deep geological repositories for storing nuclear waste, the deep sea or in isolated areas where a deployable long-lived power system is required such as remote mines.
Apart from space missions, the RPS could provide power for challenging environments on Earth such as deep geological repositories for nuclear waste