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Hirano, Fumio; Sato, Seichi*; Kozaki, Tamotsu*; Inagaki, Yaohiro*; Iwasaki, Tomohiko*; Oe, Toshiaki*; Kato, Kazuyuki*; Kitayama, Kazumi*; Nagasaki, Shinya*; Niibori, Yuichi*
Journal of Nuclear Science and Technology, 49(3), p.310 - 319, 2012/03
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)The thermal impacts of hull and end piece wastes from the reprocessing of MOX spent fuels burned in LWRs on repository performance were investigated. The heat generation rates in MOX spent fuels and the resulting heat generation rates in hull and end piece wastes change depending on the fuel histories including the burn-up of UO
spent fuels, the cooling period before reprocessing, the storage period of fresh MOX fuels. The heat generation rates of hull and end piece wastes from the reprocessing of MOX spent fuels with any of those histories are significantly larger than those from UO spent fuels with burn-ups of 45 GWd/THM. If a temperature below 80
C is specified for cement-based materials used in waste packages after disposal, the allowable number of canisters containing compacted hull and end pieces in a package for 45 GWd-MOX needs to be limited to a value of 0.7 to 1.6, which is significantly lower than the value of 4.0 for 45 GWd-UO.
Tsukimori, Kazuyuki; *; Furuhashi, Ichiro*; ;
JNC TN9400 99-056, 62 Pages, 1999/06
The lining structure of LMFBR has an important function to prohibit leaked sodium from having contact with floor concrete at sodium leakage accident. Therefore, the integrity of the liner during the sodium leakage accident should be confirmed. The maximum temperature of the liner at the sodium leakage accident rises very quickly. On the other hand, thinning of the liner due to corrosion progresses gradually compared with the rise of temperature even if the thinning rate in case of molten salt type corrosion is assumed. Therefore, there is a possibility to estimate maximum strain of the liner excessively large compared with the actual value. In this study the modeling of thinning process of liner was developed in order to realize reasonable analysis from the point of view of actual phenomena. The concept of the method is to release the stress of the losing region by using artificial creep and reducing Young's modulus. The validity of this method was verified through some example analyses by FINAS equipped with this thinning model as users' subroutines.
; ; ; ; *; *; *; *
JAERI-M 6346, 20 Pages, 1975/12
no abstracts in English
; *; *; *; *
Hoken Butsuri, 7(1), p.37 - 41, 1972/00
no abstracts in English
Onizawa, Takashi; Kato, Shoichi; Ando, Masanori; Wada, Yusaku; Tsukimori, Kazuyuki
no journal, ,
no abstracts in English
Terada, Atsuhiko; Hino, Ryutaro; Sugiyama, Hitoshi*; Kato, Naoto*; Takase, Kazuyuki*
no journal, ,
A new type passive autocatalytic recombiner has been developed, as one of hydrogen safety managements for waste storage. In this report, thermal hydraulic analysis show PAR concept proposed is feasible for hydrogen mitigation in waste container.
Horii, Yuta; Hirooka, Shun; Kato, Masato; Uno, Hiroki*; Ogasawara, Masahiro*; Tamura, Tetsuya*; Yamada, Tadahisa*; Okumura, Kazuyuki
no journal, ,
As part of studies on physical properties of low-decontaminated fuel pellets, simulated FPs (SmO
and NdO) and impurities included at such as fuel fabrication process (AlO and SiO) were added to MOX, and their effects on thermal conductivity were evaluated. Addition of SmO and NdO in MOX, that can be solutionized, decreased thermal conductivity whereas addition of AlO and SiO, that don't make a solid solution with MOX, increased thermal conductivity.
