Abstract
This paper discusses containment aspects of a conceptual commercial water-cooled fusion power reactor. The primary coolant temperature in such a reactor must be at least 300°C for acceptable thermodynamic efficiency. In the event of a coolant water pipe rupture, the outflow of hot water and steam will pressurize the vessel or compartment where the rupture takes place. Depending on the conditions, this pressurization may well break the walls of the vessel or compartment. The study addresses the pressure build up and means to depressurize the space if necessary. Due to the mobile content of tritium and radioactive dust, special attention is required with respect to the venting arrangement.
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