The Behavior of Radiolytically Produced Hydrogen in a High-Level Liquid Waste Tank of a Reprocessing Plant: Hydrogen Concentration in the Ventilated Tank Air

The H₂ concentration was measured in the ventilated air of actual high-level liquid waste tanks of the Tokai reprocessing plant. It was compared with the value calculated from the parameters that were obtained using the simulated solution. Both values agreed satisfactorily within the limits of uncertainties of the parameters. This agreement showed that the catalytic H₂ consumption reaction caused by Pd ions, which was found previously using the simulated solution, proceeds also in the actual solution. The measured “G(H₂)” for the actual solution and the derived one using the parameters from the simulated solution were between 7×10⁻⁶ and 3×10⁻⁵.