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  Nuclear fuel cycle reimagined: Powering the next frontiers from nuclear waste
  In the fall of 2023, a small Zeno Power team accomplished a major feat: they demonstrated the first strontium-90 heat source in decades—and the first-ever by a commercial company.
  Zeno Power worked with Pacific Northwest National Laboratory to fabricate and validate this Z1 heat source design at the lab’s Radiochemical Processing Laboratory. The Z1 demonstration heralded renewed interest in developing radioisotope power system (RPS) technology. In early 2025, the heat source was disassembled, and the Sr-90 was returned to the U.S. Department of Energy for continued use.
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Fission yields determined for fission of ²³⁸U with monoenergetic neutrons have been used to calculate the fission yields expected in ²³⁸U when exposed to a Watt neutron spectrum for ²³⁵U and in the center of the Experimental Breeder Reactor II core. The calculated results are compared with the experimental results for several reactors and with the fast fission yields recommended by two compilers.

Fission Yields for Fast-Neutron Fission of Uranium-238