Construction of an electrode for irradiated UO(2) fuel and preliminary results concerning its use in aqueous solutions
In this paper an electrode and reaction vessel design is presented that is suitable for use in hot cells. The electrode can be constructed of irradiated materials such as highly active glasses or irradiated fuels and can be inserted in the vessel using manipulators. The first tests of the experimental set-up using dummy cells are given along with the first results of the irradiated UO(2) electrodes. These are compared with similar tests using natural UO(2) in 3% Na(2) CO(3) solutions. Optical microscopy and scanning electron microsocpy (SEM) was performed on the electrodes. The porosity and high resistivity of the natural UO(2) material makes it very susceptible to pitting corrosion at defects or grain boundaries. Irradiated UO(2) has a much lower resistivity but is still susceptible to pitting, especially as there are more defects and secondary phases present. The overall corrosion rate is higher for the irradiated UO(2).
Bibliographic Reference: Article: Journal of Nuclear Materials (1996)
Record Number: 199611069 / Last updated on: 1996-09-30
Original language: en
Available languages: en