Rate of Isotope Exchange Reaction Between Tritiated Water in a Gas Phase and Water on the Surface of Piping Materials

Comparative study of the tritium distribution in metals

“…Metals also catalyse the isotopic exchange reaction between tritium on the metallic surface and hydrogen containing species in the gas phase. The rate of the tritium isotopic exchange between the water in the gas phase and tritium on the metallic surface was found to be almost independent of the temperature in the range 280-550 K [20].…”

Surface mediated isotope exchange reactions between water and gaseous deuterium

“…However, the database of actual rate coefficients of isotope exchange reactions at various materials is rather limited [7,8]. In this work we report rate coefficients for isotope exchange reactions between deuterium gas and water taking place at the surface of a stainless steel vessel.…”

Isotope exchange reaction between tritiated water and hydrogen on SiC

“…The obtained values are shown in Fig. 6 comparing with the values for graphite [14] and metals as stainless steel, copper and aluminum [16]. The overall mass transfer coefficient of the isotope exchange reaction (2) is observed to be constant as 3.48 · 10 À5 m/s.…”

“…The tritium sorption properties of copper have been already obtained in the previous study [13,16]. The tritium sorption properties of quartz are previously obtained in this work as tritium trapping capacity is 3:74 Â 10 À13 expð3120 ðJ=molÞ=RT Þ mol T 2 /cm 2 , where R is the gas constant (J/mol K) and T is temperature (K), and the overall mass transfer coefficient of the isotope exchange reaction (2) is 1.20 · 10 À8 m/s.…”