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The suggestion that 3He in relevant amounts can be found at the surface of the moon has renewed interest in the D(-)3He fuel cycle in fusion power reactors. The main advantages of D(-)3He as compared to DT fuel cycles are related to the safety and environmental aspects of plant operation. The fuel constituents are stable elements and most of the power produced would be in the form of radiation and charged particles. Due to secondary D-D and D-T reactions, tritium and neutrons will also be produced in a D(-)3He reactor, although the irradiological impact will be much smaller than in the case of DT-systems. The paper firstly reviews the studies in progress of tokamak/D(-)3He fusion power reactor plants. Then, from these reactor design data, an evaluation is made of the main safety and environmental factors. These are seen to be tritium and activation products hazards in case of accident, decay heat and radioactive waste level and management problems. The accident analysis focusses on the first-wall loss-of-coolant case, which is considered as the worst one in a fusion reactor. The impact of the relevant design options on the safety of the D(-)3He tokamaks is discussed. This concerns, in particular, the fuel composition and the type of material adopted for the first wall and blanket structures.

Additional information

Authors: CASINI G, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Tritium and Advanced Fuels in Fusion Reactors, Varenna (IT), Sept. 6-15, 1989
Availability: Available from (1) as Paper EN 35056 ORA
Record Number: 199010041 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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