Minimization of the tritium content within the first wall of a Tokamak reactor
The main objective of this numerical study is to investigate how to minimize the tritium content in the first wall of a tokamak reactor. Mainly pulsed tokamak operation with 100-s cycle durations, 75-s duty times, and outgassing phases with durations tau/sub g/ between 500 and 3000 s in envisaged. These outgassing phases are started after every N/sub rho/ cycle (20 < N/sub rho/ <70). For modeling, a multicode is applied that describes the surface and volume processes determining the tritium inventory in and the permeation through the first wall, the neutral gas background due to the recycling of the plasma, and the transport processes governing the parameters of the three-species burning plasma. The calculations show that control of the wall temperature T/sub w/, determined by the heat transfer to the coolant and the radiation loading by the plasma, is decisive for the tritium buildup. Cooling is achieved by pressurized water or helium at a pressure rho/sub HE/ = 30 bar. The coolant channels are assumed to be composed of a corrugated steel sheet and the first wall, both connected in a panel-type construction.
- Research Organization:
- Institut fur Plasmaphysik der Kernforschungsanlage Julich GmbH, Association Euratom-KFA, P.O. Box 1913, D-5170 Julich
- OSTI ID:
- 6004859
- Journal Information:
- Fusion Technol.; (United States), Journal Name: Fusion Technol.; (United States) Vol. 12:1; ISSN FUSTE
- Country of Publication:
- United States
- Language:
- English
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BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COMPUTER CODES
COMPUTERIZED SIMULATION
COOLANTS
DEGASSING
ELEMENTS
ENERGY TRANSFER
FEEDWATER
FIRST WALL
FLUIDS
GASES
HEAT TRANSFER
HELIUM
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
INVENTORIES
ISOTOPES
LIGHT NUCLEI
MEDIUM PRESSURE
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
OXYGEN COMPOUNDS
PERMEABILITY
PLASMA
PULSES
QUANTITY RATIO
RADIOISOTOPES
RARE GASES
RECYCLING
SIMULATION
THERMONUCLEAR REACTOR WALLS
THERMONUCLEAR REACTORS
TIME DEPENDENCE
TOKAMAK TYPE REACTORS
TRITIUM
WATER
YEARS LIVING RADIOISOTOPES