Transport Equivalent Diffusion Constants for Reflector Region in PWRs
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概要
- 論文の詳細を見る
The diffusion-theory-based nodal method is widely used in PWR core designs for reason of its high computing speed in three-dimensional calculations. The baffle/reflector (B/R) constants used in nodal calculations are usually calculated based on a one-dimensional transport calculation. However, to achieve high accuracy of assembly power prediction, two-dimensional model is needed. For this reason, the method for calculating transport equivalent diffusion constants of reflector material was developed so that the neutron currents on the material boundaries could be calculated exactly in diffusion calculations. Two-dimensional B/R constants were calculated using the transport equivalent diffusion constants in the two-dimensional diffusion calculation whose geometry reflected the actual material configuration in the reflector region. The two-dimensional B/R constants enabled us to predict assembly power within an error of 1.5% at hot full power conditions.
- 一般社団法人 日本原子力学会の論文
- 2002-07-25
著者
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Sekimoto Hiroshi
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
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Tahara Yoshihisa
Reactor Core Engineering Department Mitsubishi Heavy Industries Ltd.
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