PULSAR space project

The Challenge

The EU-funded PULSAR research project, whose consortium was led by Tractebel, aimed to address the critical need for reliable power sources in lunar space missions where solar energy is insufficient. The challenge was to develop a conceptual design for a plutonium-238 (Pu-238)-fuelled radioisotope power system (RPS) capable of supporting lunar rovers and cargo carriers in low-light conditions.

The Solution

Tractebel’s nuclear experts provided comprehensive engineering services to overcome this challenge. They conducted structural integrity checks, radiation dose assessments, thermal analysis, and mechanical assembly development. The team also developed a 3D mechanical and thermal model to simulate lunar conditions, ensuring the RPS design’s resilience and efficiency. This included incorporating safety measures for launch and utilising two Stirling engines powered by a centrally located Pu-238 heat source.

The Impact

The PULSAR project, completed at the end of 2024, delivered significant outcomes. It established a conceptual RPS design tailored for lunar applications, conducted a feasibility study for Pu-238 production in Europe, and explored the potential of dynamic power systems beyond space applications. These achievements and especially the Pu-238-fuelled RPS conceptual design designed by Tractebel lay the groundwork for Europe’s participation in future lunar missions, including the upcoming Argonaut lunar lander mission, and enhance European capabilities in space exploration technology.