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Neutronics design of JMTR-LEU core

Technical Report:

Abstract

The core conversion from MEU fuel to LEU of the JMTR, a 50 MW light water moderated and cooled tank type reactor using ETR-type fuel, is scheduled in 1993. As a part of the safety analyses for the JMTR LEU core, the neutronics characteristics analysis was carried out. In conversion to LEU fuel, the following things will be changed in JMTR operation: (1) extend the cycle length from 12 days in the present MEU core to 25 days, and (2) introduce cadmium wires with a diameter of 0.3 mm as burnable absorber in the sideplates to reduce the excess reactivity at the beginning of cycle. This report describes the analytical methods and results of the nuclear characteristics analysis of the JMTR LEU core. The results show that the LEU fuel core would provide neutronics characteristics similar to those of the MEU fuel core and the use of Cd burnable absorber is effective for the JMTR operation. (author).
Publication Date:
Jul 01, 1992
Product Type:
Technical Report
Report Number:
JAERI-M-92-098
Reference Number:
SCA: 220600; PA: JPN-92:011194; SN: 93000918599
Resource Relation:
Other Information: PBD: Jul 1992
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; JMTR REACTOR; SLIGHTLY ENRICHED URANIUM; SAFETY; BURNABLE POISONS; CADMIUM; DESIGN; REACTOR CORES; CONTROL ELEMENTS; WIRES; NEUTRONS; 220600; RESEARCH, TEST, TRAINING, PRODUCTION, IRRADIATION, MATERIALS TESTING REACTORS
OSTI ID:
10111228
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE93753273; TRN: JP9211194
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
87 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Nagaoka, Yoshiharu, Komukai, Bunsaku, Sakurai, Fumio, Koike, Sumio, Saito, Minoru, and Futamura, Yoshiaki. Neutronics design of JMTR-LEU core. Japan: N. p., 1992. Web.
Nagaoka, Yoshiharu, Komukai, Bunsaku, Sakurai, Fumio, Koike, Sumio, Saito, Minoru, & Futamura, Yoshiaki. Neutronics design of JMTR-LEU core. Japan.
Nagaoka, Yoshiharu, Komukai, Bunsaku, Sakurai, Fumio, Koike, Sumio, Saito, Minoru, and Futamura, Yoshiaki. 1992. "Neutronics design of JMTR-LEU core." Japan.
@misc{etde_10111228,
title = {Neutronics design of JMTR-LEU core}
author = {Nagaoka, Yoshiharu, Komukai, Bunsaku, Sakurai, Fumio, Koike, Sumio, Saito, Minoru, and Futamura, Yoshiaki}
abstractNote = {The core conversion from MEU fuel to LEU of the JMTR, a 50 MW light water moderated and cooled tank type reactor using ETR-type fuel, is scheduled in 1993. As a part of the safety analyses for the JMTR LEU core, the neutronics characteristics analysis was carried out. In conversion to LEU fuel, the following things will be changed in JMTR operation: (1) extend the cycle length from 12 days in the present MEU core to 25 days, and (2) introduce cadmium wires with a diameter of 0.3 mm as burnable absorber in the sideplates to reduce the excess reactivity at the beginning of cycle. This report describes the analytical methods and results of the nuclear characteristics analysis of the JMTR LEU core. The results show that the LEU fuel core would provide neutronics characteristics similar to those of the MEU fuel core and the use of Cd burnable absorber is effective for the JMTR operation. (author).}
place = {Japan}
year = {1992}
month = {Jul}
}