摘要
The paper is a summary of Russian material studies performed in frames of activi-ties aiming at substantiation of safety of the International Thermonuclear Experimental Reactor(ITER) after 2001. Subthreshold sputtering of tungsten by 5 eV deuterons was revealed at temper-atures above 1150℃. Mechanism of globular films formation was further studied. Computationsof tritium permeation into vacuum vessel coolant confirmed the acceptability of vacuum vesselcooling system for removal of the decay heat. The most dangerous accident with high-currentare in toroidal superconducting magnets able to burn out a bore up to 0.6 m in diameter in thecryostat vessel was determined. Radiochemical reprocessing of V-Cr-Ti alloy and its purificationfrom activation products down to a contact dose rate of ～ 10 μSv/h was developed.
The paper is a summary of Russian material studies performed in frames of activi-ties aiming at substantiation of safety of the International Thermonuclear Experimental Reactor(ITER) after 2001. Subthreshold sputtering of tungsten by 5 eV deuterons was revealed at temper-atures above 1150℃. Mechanism of globular films formation was further studied. Computationsof tritium permeation into vacuum vessel coolant confirmed the acceptability of vacuum vesselcooling system for removal of the decay heat. The most dangerous accident with high-currentare in toroidal superconducting magnets able to burn out a bore up to 0.6 m in diameter in thecryostat vessel was determined. Radiochemical reprocessing of V-Cr-Ti alloy and its purificationfrom activation products down to a contact dose rate of ～ 10 μSv/h was developed.
