Fission fragment transport effects on heat transfer in fissioning gases

Journal Article · Sat Aug 01 04:00:00 EDT 1992 · Nuclear Science and Engineering; (United States)

OSTI ID:7026896

Watanabe, Y; Appelbaum, J ^[1]

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1. Univ. of Florida, College of Engineering, Innovative Nuclear Space Power Inst., Dept. of Nuclear Engineering Sciences, Gainesville, FL (US)

This paper discusses direct energy transfer by fission fragments near the wall of a cavity containing fissioning gas studied in plane and cylindrical geometries. Analytical formulas are derived for the fission fragment energy flux. Heat transfer equations are solved for optically thick fissioning gases by taking into account the fission fragment energy transport effect. The results are applied to a heat transfer analysis of the fuel assemblies of a heterogeneous gas core reactor. The energy transfer mechanism in the fissioning gas is essentially nonlinear. Thus, the cooling effect due to direct fission fragment energy loss to the container walls does not become significant until the stopping range considerably exceeds the characteristic dimensions of the container.

• OSTI ID: 7026896
• Journal Information: Nuclear Science and Engineering; (United States), Journal Name: Nuclear Science and Engineering; (United States) Vol. 111:4; ISSN 0029-5639; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
663470* -- Fission-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYTICAL SOLUTION
CAVITIES
CYLINDERS
DIMENSIONS
ENERGY TRANSFER
EQUATIONS
FISSION
FISSION FRAGMENTS
FLUIDS
GASES
GEOMETRY
HEAT TRANSFER
MATHEMATICS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
THICKNESS
WALLS