| Popis: |
Experiments were conducted on different bulk getter materials (Ti, Zr, Ce) in order to study their potential in a new gas purification concept for high‐temperature gas‐cooled reactors. Since the removal of hydrogen and tritium represents the main problem, the measurements concentrated on plateau pressures of the metal hydrides, the kinetics of absorption, passivation, and hydrogen isotope effects. The apparatus used for model investigations with H2 and D2 is a UHV device involving two hot metal beds one of which consists of a microbalance system, various total pressure gauges, and a quadrupole mass spectrometer. The absorption rates were found to be linear with pressure, which is consistent with gas kinetic theory. Plateau pressure measurements down to 10−8 mbar confirm extrapolated literature data, while an observed significant isotope effect near ambient temperature may be understood as a specific passivation effect. |
