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Terunuma, Naohiro; Nagao, Yoshiharu; Yokouchi, Iichiro; Sato, Masashi
JAEA-Review 2007-034, 60 Pages, 2007/10
JAEA-Review-2007-034.pdf:36.36MB
Concentrations of radioactive elements in primary cooling water were measured by regular sampling on reactor operation of the JMTR. The JMTR core was converted to low enriched uranium core at the 108th operation cycle, and the refurbishment of the JMTR has been started after the 165th operation cycle. Measured results of concentrations of 
-ray release elements, radioactive iodine and tritium in primary cooling water were summarized during 108 - 165th operation cycles.
Nagao, Yoshiharu; Sato, Masashi; Niimi, Motoji
JAEA-Technology 2007-051, 73 Pages, 2007/09
JAEA-Technology-2007-051.pdf:6.1MB
An evaluation procedure using Monte Carlo method has been introduced to evaluate dose in neutron- mixing field of nuclear reactor. Benchmark calculations of the heating rate experiments in JMTRC and the nuclear heating rate measurements by the nuclear heating rate measurement capsule in JMTR were conducted by the procedure. As the results, it was confirmed that the procedure was applicable to evaluate /nuclear heating rate of JMTR. The nuclear heating distribution of JMTR core was analyzed, and the nuclear heating data maps were prepared. The values of the data maps were comparison with the results of irradiation tests by the nuclear heating rate measurement capsule. As the results, the values of the data map were within -27 to +35 % in comparison with the irradiation tests. The data maps are therefore utilizable for thermal design of irradiation capsule with more accurate temperature control, after refurbishment of the JMTR.
Tanaka, Hidetaka; Nagao, Yoshiharu; Osawa, Kenji; Sato, Masashi
JAEA-Review 2007-019, 37 Pages, 2007/03
JAEA-Review-2007-019.pdf:3.2MB
Irradiation tests are increasing in advanced irradiation research for accurate prediction control and evaluation of irradiation parameter such as neutron fluence, etc. by using JMTR. Irradiation capsule internals are therefore structurally complicated recently. This report described the procedure of non destructive tests such as radiographic test, penetrant test, ultrasonic test, etc. for inspection of irradiation capsules in JMTR, and the result of examination of confirmation procedure for internal parts of irradiation capsules.
Sawa, Kazuhiro; Yoshimuta, Shigeharu*; ; Saito, Kenji; Tobita, Tsutomu*
JAERI-Research 98-016, 34 Pages, 1998/03
JAERI-Research-98-016.pdf:1.21MB
no abstracts in English
Sawa, Kazuhiro; Yoshimuta, Shigeharu*; Tobita, Tsutomu*;
JAERI-Research 97-036, 23 Pages, 1997/05
JAERI-Research-97-036.pdf:0.72MB
no abstracts in English
Miyazawa, Masataka; Itabashi, Yukio; ; ; ; ; ; Oyamada, Rokuro;
9th Int. Symp. on Packaging and Transportation of Radioactive Materials, Vol. 3, p.1686 - 1693, 1989/00
no abstracts in English