A fast and sensitive method for evaluating nuclides migration characteristics in rock medium by using micro-channel reactor concept

Initial dissolution rate of a Japanese simulated high-level waste glass P0798 as a function of pH and temperature measured by using micro-channel flow-through test method

“…Aqueous dissolution tests were performed for a Japanese type of simulated HLW glass P0798 by using a newly developed MCFT test method to evaluate the initial dissolution rate of glass matrix, r 0 , precisely and consistently as a function of solution pH (3)(4)(5)(6)(7)(8)(9)(10)(11) and temperature (25-908C). The test results indicated that the r 0 shows a ''V-shaped'' pH dependence at 258C, which is almost consistent with the previous results measured by using other test methods including SPFT method.…”

“…Figure 1 shows schematics of the MCFT test apparatus. The test apparatus has been originally developed by Okuyama et al in order to measure both diffusion and sorption coefficients of rock medium [9,10], and it has been modified to suit measurement of the glass dissolution/alteration kinetics by Inagaki et al [7,8]. The test apparatus consisted of three parts: an injection syringe pump, a micro-channel reactor unit, and an automatic sampler, being connected with each other with PTFE (polytetrafluoroethylene, Teflon 1 ) tubing.…”

Initial Dissolution Rate of the International Simple Glass as a Function of pH and Temperature Measured Using Microchannel Flow‐Through Test Method

“…Figure shows schematics of the microchannel flow‐through (MCFT) test apparatus. The test apparatus has been originally developed by Okuyama et al . to measure both diffusion and sorption coefficients of rock medium, and it has been modified to suit measurement of the glass dissolution/corrosion rate by Inagaki et al .…”

“…Figure 1 shows schematics of the microchannel flow-through (MCFT) test apparatus. The test apparatus has been originally developed by Okuyama et al 11,12 to measure both diffusion and sorption coefficients of rock medium, and it has been modified to suit measurement of the glass dissolution/corrosion rate by Inagaki et al [7][8][9] The test apparatus consists of three parts: an injection syringe pump, a microchannel reactor unit, and an automatic sampler, being connected with each other with PTFE (Teflon â ; DuPont, Wilmington, DE) tubing. The microchannel reactor unit with PTFE tubing is placed in an oven to maintain the reaction temperature, and the automatic sampler is placed in a glove box to prevent evaporation loss of sampling solution.…”