Direct integration multiple collision integral transport analysis method for high energy fusion neutronics

Thesis/Dissertation · Tue Jan 01 00:00:00 EST 1985

OSTI ID:5677590

Koch, K R

A new analysis method specially suited for the inherent difficulties of fusion neutronics was developed to provide detailed studies of the fusion neutron transport physics. These studies should provide a better understanding of the limitations and accuracies of typical fusion neutronics calculations. The new analysis method is based on the direct integration of the integral form of the neutron transport equation and employs a continuous energy formulation with the exact treatment of the energy angle kinematics of the scattering process. In addition, the overall solution is analyzed in terms of uncollided, once-collided, and multi-collided solution components based on a multiple collision treatment. Furthermore, the numerical evaluations of integrals use quadrature schemes that are based on the actual dependencies exhibited in the integrands. The new DITRAN computer code was developed on the Cyber 205 vector supercomputer to implement this direct integration multiple-collision fusion neutronics analysis. Three representative fusion reactor models were devised and the solutions to these problems were studied to provide suitable choices for the numerical quadrature orders as well as the discretized solution grid and to understand the limitations of the new analysis method. As further verification and as a first step in assessing the accuracy of existing fusion-neutronics calculations, solutions obtained using the new analysis method were compared to typical multigroup discrete ordinates calculations.

• Research Organization: Purdue Univ., Lafayette, IN (USA)
• OSTI ID: 5677590
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
NEUTRON TRANSPORT THEORY
ANALYTICAL SOLUTION
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
MATHEMATICAL MODELS
MULTIPLE COLLISION METHOD
SCATTERING
TRANSPORT THEORY
700105* - Fusion Energy- Plasma Research- Plasma Kinetics-Theoretical- (-1987)
700200 - Fusion Energy- Fusion Power Plant Technology