Fabrication constraints applied to the reactor physics design of the Advanced Neutron Source

Conference · Tue Jan 01 04:00:00 EST 1991 · Transactions of the American Nuclear Society; (United States)

OSTI ID:5854802

Primm, III, R T ^[1]

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1. Oak Ridge National Lab., TN (United States)

The Advanced Neutron Source (ANS) reactor, currently in the conceptual design stage, will provide neutrons for a variety of research and development tasks. The reactor concept and methods of analysis have been described. The current work presents the impact of fabrication restrictions on the {sup 235}U distribution within the core. Because the ANS reactor operates at a high power density (above 5 MW/{ell}), the concentration of {sup 235}U is varied radially and axially along the fuel elements to obtain an optimal power shape. The optimal shape is determined by several factors, including prevention of incipient boiling within the core and prevention of spallation of aluminum oxide from the fuel clad. The optimal radial power shape is for the profile to be flat. The optimal axial power shape is for the highest power density to be at the lower edge of the element with a linear decrease in power density as the height increases. The presence of control blades and their movement during the cycle inhibits attaining the optimal distribution.

• OSTI ID: 5854802
• Report Number(s): CONF-910603--
• Conference Information: Journal Name: Transactions of the American Nuclear Society; (United States) Journal Volume: 63
• Country of Publication: United States
• Language: English

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