Improvement of numerical analysis method for FBR core characteristics (III)

Takeda, Toshikazu*; Kitada, Takanori*; *; *

PNC TJ9605 98-001, 267 Pages, 1998/03

PNC-TJ9605-98-001.pdf:11.65MB

As the improvement of numerical analysis method for FBR core characteristics, studies on several topics have been conducted; multiband method, Monte Carlo perturbation and nodal transport method. This report is composed of the following three parts. Part 1: Improvement of Reaction Rate Calculation Method in the Blanket Region Based on the Multiband Method. A method was developed for precise evaluation of the reaction rate distribution in the blanket region using the multiband method. With the 3-band parameters obtained from the ordinary fitting method, major reaction rates such as U-238 capture, U-235 fission, Pu-239 fission and U-238 fission rate distributions were analyzed. As for the nuclides to be analyzed, the elements of structure material, such as iron, nickel, chrome and sodium were considered. By the present method, all the reactions became larger at the deep region in the blanket. The maximum correction amounted as much as 5%. This tendency lessen the disagreement between the ordinary calculation and the experiment. It was made clear that the treatment in inter-band scattering term is veryimportant because it has large sensitivity on the result. An alternative method to determine the multiband parameters whieh method is based on more direct approach and is free from drawbacks in the present method, was also investigated. Part 2 : Improvement of Estimation Method for Reactivity Based on Monte-Carlo Perturbation Theory. Perturbation theory based on Monte-Carlo perturbation theory have been investigated and introduced into the calculational code. The continuous energy Monte-Carlo perturbation code has been developed by using not only the correlated sampling method which is already used before, but also the derivative operator sampling method. The Monte-Carlo perturbation code was applied to MONJU core and the calculational results were compared to the reference. The change of eigenvalue caused by the change of sodium density in the GEM or dummy ...

Cross-section sensitivity study for the toroidal field coil shielding parameters in the ITER/OTR design

S.Zimin*

Fusion Technology, 24, p.168 - 179, 1993/09

no abstracts in English

Investigation of particle transport in JT-60 using a perturbation method

Nagashima, Keisuke; Fukuda, Takeshi; Kikuchi, Mitsuru; Hirayama, Toshio; Nishitani, Takeo; Takeuchi, Hiroshi

Nuclear Fusion, 30(11), p.2367 - 2375, 1990/11

https://doi.org/10.1088/0029-5515/30/11/012

no abstracts in English

Convergence and error estimate of perturbation method in reactor calculations

Journal of Nuclear Science and Technology, 13(8), p.413 - 422, 1976/08

https://doi.org/10.3327/jnst.13.413

no abstracts in English

Some Properties of the Higher Order Perturbation Method; One Group Diffusion Aapproximation

JAERI-M 5325, 30 Pages, 1973/07

JAERI-M-5325.pdf:0.68MB

no abstracts in English

The Study of the Perturbation Method Used in Fast Reactor Analysis

JAERI-M 5076, 37 Pages, 1972/12

JAERI-M-5076.pdf:1.15MB

no abstracts in English

Generailized Perturbation Code for Calculating the Reactivity and It's Ratics; GENPER-2

; ;

JAERI-M 4587, 32 Pages, 1971/09

JAERI-M-4587.pdf:1.06MB

no abstracts in English