Effects of particle transport on helium ash accumulation and sustained ignition in the international thermonuclear experimental reactor
- Princeton Univ., Plasma Physics Lab., Princeton, NJ (US)
This paper reports the buildup of helium ash has been studied in a series of simulations with the BALDUR transport code in the proposed International Thermonuclear Experimental Reactor (ITER) experiment at low density {bar n}{sub e} = 8.3 {times} 10{sup 19}/m{sup {minus}3}. Sustained ignition is found to be possible only for R{sub He} {lt} 0.5 {yields} 0.9, with lower values required at lower edge densities. Using radially dependent thermal diffusivities that were scaled from Joint European Torus (JET) values, the effects of particle transport coefficients and edge recycling on helium poisoning of ignition are studied. A sustained ignition is obtained when the exhaust of helium from the edge plasma is allowed to exceed 10% of the helium flux into the edge plasma from the core plasma, and the ratio of particle (helium ion) to thermal diffusivities. D/{chi}, is {gt}1/4. The simulations include the effects of sawtooth oscillations, radiative as well as conductive energy loss channels, and density profile variations.
- OSTI ID:
- 5609302
- Journal Information:
- Fusion Technology; (United States), Vol. 20:1; ISSN 0748-1896
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
HELIUM ASH
B CODES
ITER TOKAMAK
PLASMA SIMULATION
SAWTOOTH OSCILLATIONS
ALPHA PARTICLES
CHARGED-PARTICLE TRANSPORT
ENERGY LOSSES
EXPERIMENTAL REACTORS
REACTOR KINETICS
THERMAL DIFFUSIVITY
CHARGED PARTICLES
CLOSED PLASMA DEVICES
COMPUTER CODES
HELIUM IONS
IONS
KINETICS
LOSSES
OSCILLATIONS
PHYSICAL PROPERTIES
RADIATION TRANSPORT
REACTORS
RESEARCH AND TEST REACTORS
SIMULATION
THERMODYNAMIC PROPERTIES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700411* - Inertial Confinement Devices- (1992-)
700340 - Plasma Waves
Oscillations
& Instabilities- (1992-)
220600 - Nuclear Reactor Technology- Research
Test & Experimental Reactors