SYMPOSIA PAPER Published: 01 January 2001

Three Dimensional Neutron Analysis in the Baffle-Former Area of PWR Plant


Three dimensional (3-D) neutron flux distributions are usually obtained by synthesizing the results from the two dimensional (2-D) calculations. However, 3-D neutron flux synthesis is inadequate in a complex geometry like the baffle-former plate area of a PWR plant because it spreads out along another axis that can not be expressed in 2-D geometry. 3-D neutron analyses for geometry with former plate were done with the three dimensional discrete ordinates code TORT [1]. Neutron spectra were obtained at the former plate area and various locations within the reactor vessel. These results were compared for energy above 0.1 MeV and 1.0 MeV with those of 2-D analyses.

Author Information

Kitagawa, H
Mitsubishi Heavy Industries, Ltd., Kobe, Japan
Yamagiwa, N
Mitsubishi Heavy Industries, Ltd., Kobe, Japan
Yamashita, K
Mitsubishi Heavy Industries, Ltd., Kobe, Japan
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Developed by Committee: E10
Pages: 532–539
DOI: 10.1520/STP13639S
ISBN-EB: 978-0-8031-5450-6
ISBN-13: 978-0-8031-2884-2