A 4.3 cm long section of a uranium oxide fuel rod from NRX. For the first 15 years of operation (1947-1961) natural uranium-metal rods were used as the standard fuel. In 1961 solid-pellet, uranium-oxide rods were fabricated for irradiation. This short section was from one of the unirradiated rods and was used for display purposes and for years served as a paperweight to AECL Head Office in Ottawa. The diameter of the uranium-oxide section is 35 mm while the sheath thickness is 2 mm. The unit sits inside a fuel channel with an inside diameter of 41 mm and an outside diameter of 46 mm.
