Revaluation of JACS code system benchmark analyses of the heterogeneous system; Fuel rods in U+Pu nitric acid solution system

Takada, Tomoyuki; Miyoshi, Yoshinori; Katakura, Junichi

JAERI-Tech 2003-036, 80 Pages, 2003/03

JAERI-Tech-2003-036.pdf:3.67MB

In order to perform accuracy evaluation of the critical calculation by the combination of multi-group constant library MGCL and 3-dimensional Monte Carlo code KENO-IV among critical safety evaluation code system JACS, benchmark calculation was carried out from 1980 in 1982. Some cases where the neutron multiplication factor calculated in the heterogeneous system in it was less than 0.95 were seen. In this report, it re-calculated by considering the cause about the heterogeneous system of the U+Pu nitric acid solution systems containing the neutron poison shown in JAERI-M 9859. The present study has shown that the keff value less than 0.95 given in JAERI-M 9859 is caused by the fact that the water reflector below a cylindrical container was not taken into consideration in the KENO-IV calculation model. By taking into the water reflector, the KENO-IV calculation gives a keff value greater than 0.95 and a good agreement with the experiment.

MAIL3.1; A Computer program generating cross section sets for SIMCRI, ANISN-JR, KENO IV, KENO V, MULTI-KENO, MULTI-KENO-2 and MULTI-KENO-3.0

Suyama, Kenya; Komuro, Yuichi; Takada, Tomoyuki*; Kawasaki, Hiromitsu*; Ouchi, Keisuke*

JAERI-Data/Code 98-004, 172 Pages, 1998/02

JAERI-Data-Code-98-004.pdf:4.47MB

no abstracts in English

Calculations for reflector savings of steel and stainless steel

Komiyama, Kazumasa*; Okuno, Hiroshi

JAERI-Research 94-047, 39 Pages, 1994/12

JAERI-Research-94-047.pdf:0.89MB

no abstracts in English

Reactivity effect of borated stainless steel plate in single and coupled cores composed of low-enriched UO rods

Miyoshi, Yoshinori; Nakajima, Ken; ; Kobayashi, Iwao; Aoki, Shigeaki*; *; *; *

Journal of Nuclear Science and Technology, 31(4), p.335 - 348, 1994/04

https://doi.org/10.3327/jnst.31.335

no abstracts in English

A Differential albedo for a Monte Carlo criticality program KENO IV

Komuro, Yuichi; *; *

JAERI-M 93-246, 19 Pages, 1994/01

JAERI-M-93-246.pdf:0.68MB

no abstracts in English

Generation and verification of the multigroup constants library MGCL-J3 for nuclear criticality calculations

Komuro, Yuichi; Okuno, Hiroshi; Naito, Yoshitaka; *; Nagai, Masakatsu*; *; *; *

JAERI-M 93-190, 94 Pages, 1993/10

JAERI-M-93-190.pdf:1.86MB

no abstracts in English

Criticality parameters and data for various nuclear fuel materials in infinite dimensions; Calculations with the combination of MGCL-J3 and SIMCRI

Okuno, Hiroshi; Umeda, Kentaro*; Komuro, Yuichi; Naito, Yoshitaka

JAERI-M 93-135, 98 Pages, 1993/08

JAERI-M-93-135.pdf:4.1MB

no abstracts in English

The Convenient Monte Carlo code MULTI-KENO for criticality safety analysis of transport casks

*; Naito, Yoshitaka; Okuno, Hiroshi

Proc. of the 10th Int. Symp. on the Packaging and Transportation of Radioactive Materials,Vol. 1, p.177 - 184, 1993/00

no abstracts in English

None

; ; Momose, Takumaro; Nojiri, Ichiro; ; ; Sudo, Toshiyuki

PNC TN8410 92-031, 79 Pages, 1992/02

PNC-TN8410-92-031.pdf:2.49MB

None

Improvement of JACS code system

Komuro, Yuichi; Naito, Yoshitaka; Nomura, Yasushi; *

Proc. of the 91 Int. Conf. on Nuclear Criticality Safety, p.IV-36 - IV-44, 1991/00

no abstracts in English