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JAEA Reports

Parallelization of Detailed Thermal-Hydraulic Analysis Program SPIRAL

Deguchi, Akira*; Ohshima, Hiroyuki

JNC TN9400 2003-088, 79 Pages, 2003/03

JNC-TN9400-2003-088.pdf:2.5MB

A detailed thermal-hydraulic analysis computer program SPIRAL is under development for the evaluation of local flow and temperature fields in wire-wrapped fuel pin bundles deformed by the influence of high burn-up, which are hard to reveal by experiment due to measurement difficulty. This report describes the parallelization of SPIRAL for improving applicability to larger numerical simulations. As the parallelization efficiency, approximately twelve times processing speed could be obtained by using 16 processor elements in larger scale simulations.

JAEA Reports

Development of Whole Core Thermal-Hydraulic Analysis Program ACT (IV) - Incorporation of Three-Dimensional Upper Plenum Model-

Ohshima, Hiroyuki; Deguchi, Akira*

JNC TN9400 2003-087, 105 Pages, 2003/03

JNC-TN9400-2003-087.pdf:3.14MB

A thermal-hydraulic analysis computer program ACT is under development for the evaluation of detailed flow and temperature fields in a core region of fast breeder reactors under various operation conditions. The purpose of this program development is to contribute not only to clarifying thermal hydraulic characteristics that cannot be revealed by experiments due to measurement difficulty but also to performing the rational safety design and assessment. This report describes the incorporation of three-dimensional upper plenum model to ACT and its verification study as a part of the program development.

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