The objectives of this test are to determine the gross dimensional stability of hot pressed fuel and to evaluate bond quality differences between Al-Si bonds and solid state diffusion bonds. Irradiation testing will be conducted at C Reactor and will be carried out in two parts: Part 1, Sylcor and Hanford hot press diffusion bonding processes will be compared to the Hanford Al-Si bonding process. Eighteen (18) measured monitor columns of CVNS fuel elements will be irradiated to an 800 MWD/T goal exposure. Part 2, Hanford gas pressure and Hanford hot die sizing solid state diffusion bonding processes will be compared to the Hanford Al-Si bonding process. Again, eighteen (18) measured monitor columns of CVNS fuel elements will be irradiated to an 800 MWD/T goal exposure.