A 4.0 cm long section of a uranium oxide fuel rod used in the NRU reactor. The first loading in NRU used uranium metal fuel. This was replaced by aluminum-clad uranium oxide rods around 1963. This 6.2 cm diameter section was used for display purposes and later as on office paperweight at AECL Head Office in Ottawa. A potting compound was used for this display in the cooling channels between the elements where cooling water would normally flow. The flattening on one side is due to inadvertent distortion of the relatively-soft aluminum over the years.
