An aluminum model of the ZEEP reactor presented to R. Green on his retirement to recognize his 22 years at CRNL – many of which involved work with ZEEP. The model, which stands 21 cm and sits above a 42 cm wide wooden base is largely machined out of aluminum and features movable “shielding” and a transparent glass “reactor calandria” where the fuel rods can be seen hanging in a manner very similar to the actual ZEEP arrangement. Two tanks to the left of the vessel represent the supply of heavy-water which can be pumped into the tank via glass tubing. When originally built a pump that could move “consumable celebratory liquid” was installed and could operate with the small-push button seen near the front on the right-hand side of the wooden base.