Radiation shielding of major penetrations in tokamak reactors

Journal Article · Wed Nov 01 04:00:00 EST 1978 · Nucl. Technol.; (United States)

OSTI ID:6234464

Jung, J; Abdou, M A

The geometric representation and the multi-dimensional calculational method for neutronics analysis of tokamak reactors with major penetrations have been examined. It has been found that two-dimensional models are useful for scoping studies but that three-dimensional models are necessary for detailed design studies. The material and geometry requirements of local exterior penetration shields are examined. The level of radiation streaming is parametrized as a function of the penetration size and shape. A dual-purpose duct system in which the evacuation (vacuum pumping) ducts are connected to the neutral beam ducts at locations outside the bulk shield is an attractive approach. This system reduces the overall shield requirements and potentially permits orders of magnitude reduction in the radiation level at the vacuum pumps. A comparison of the two plasma supplementary heating methods--radio frequency (rf) and neutral beams--shows that the rf system offers considerable advantage over the neutral beam system in terms of lower shielding requirements and easier control of the radiation dose in the reactor building.

• Research Organization: Argonne National Lab., IL
• OSTI ID: 6234464
• Journal Information: Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 41:1; ISSN NUTYB
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
BARYON REACTIONS
BUILDINGS
DISCRETE ORDINATE METHOD
GEOMETRY
HADRON REACTIONS
HAZARDS
HEALTH HAZARDS
MATHEMATICS
MONTE CARLO METHOD
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
RADIATION HAZARDS
SHIELDING
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS