A 16 cm by 20 cm poster showing the cut-away cross-section of the proposed, passive-operation, “nuclear battery”. This development program was carried out at the Whiteshell Laboratories during the late 1980s and the 1990s. The “battery”, designed to have a thermal output of ~2.4 MW was proposed for remote communities as a replacement for fossil fuels. It used enriched-uranium fuel encased as a coated powder and assembled as elements inside a graphite core/moderator. The graphite served as a heat sink. Energy from the graphite was extracted by liquid-potassium-based, closed-loop, heat pipes. Heat to the outside world was then transferred from the upper parts of the heat-pipes. The signatures of a number of people involved with the program are on the front of the poster but are unreadable. A list of the people and a short note is written on the back, possibly at the time of the termination of the project.
