Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Kobayashi, Hidekazu; Amamoto, Ippei; Yokozawa, Takuma; Yamashita, Teruo; Nagai, Takayuki; Kitamura, Naoto*; Takebe, Hiromichi*; Mitamura, Naoki*; Tsuzuki, Tatsuya*
Proceedings of 15th International Conference on Environmental Remediation and Radioactive Waste Management (ICEM 2013) (CD-ROM), 6 Pages, 2013/09
no abstracts in English
as the dominant sludge constituent generated from the treatment of water used for cooling the stricken power reactorsAmamoto, Ippei; Kobayashi, Hidekazu; Yokozawa, Takuma; Yamashita, Teruo; Nagai, Takayuki; Kitamura, Naoto*; Takebe, Hiromichi*; Mitamura, Naoki*; Tsuzuki, Tatsuya*
Proceedings of 15th International Conference on Environmental Remediation and Radioactive Waste Management (ICEM 2013) (CD-ROM), 8 Pages, 2013/09
The great amount of water used for cooling the stricken power reactors at Fukushima Dai-ichi has resulted in accumulation of "remaining water". As the remaining water is subsequently contaminated by FPs, etc., it is necessary to decontaminate it in order to reduce the volume of liquid radioactive waste and to reuse it again for cooling the reactors. Various techniques are being applied to remove FP, etc. and to make stable waste forms. One of the methods using the iron phosphate glass as a medium is being developed to stabilize the strontium-bearing sludge whose main component is BaSO. From the results hitherto, the iron phosphate glass is regarded as a potential medium for the target sludge.
Kato, Junya; Miyauchi, Atsushi; Aoshima, Atsushi; Shiotsuki, Masao; Yamashita, Teruo; Nakajima, Masayoshi; Morikawa, Yo; Miura, Akihiko; Fukui, Toshiki*; Yamasaki, Akito*; et al.
no journal, ,
no abstracts in English
Yamashita, Teruo; Miura, Akihiko; Kato, Junya; Shiotsuki, Masao; Ono, Isamu*; Fukui, Toshiki*; Yamasaki, Akito*; Matsumoto, Shiro*
no journal, ,
The objective of this development is to extend vitrification melter life-time to reduce burden of the high level radioactive waste management by applying advanced technologies. The candidate concepts of the long-life melter were studied with evaluation of adopted important advanced technologies such as skull layer conditions and the commutative electrode structure. It was concluded that such technology has a potential to extend melter life as 20 years even in the preliminary studies. Based on the obtained results, after the following fiscal year, evaluation of each component, small scale melter examination, and development and evaluation of simulation tool are carried out.
Miura, Akihiko; Nakajima, Masayoshi; Yamashita, Teruo; Sakai, Takaaki; Shiotsuki, Masao; Sato, Akihiro*; Kawahara, Hitoshi*
no journal, ,
no abstracts in English
Nakajima, Masayoshi; Miura, Akihiko; Yamashita, Teruo; Sakai, Takaaki; Shiotsuki, Masao; Kawahara, Hitoshi*; Sato, Akihiro*
no journal, ,
no abstracts in English
Oeda, Mikihiro; Nakajima, Masayoshi; Miura, Akihiko; Yamashita, Teruo; Shiotsuki, Masao
no journal, ,
no abstracts in English
Miura, Akihiko; Kato, Junya; Yamashita, Teruo; Shiotsuki, Masao; Matsumoto, Shiro*
no journal, ,
no abstracts in English
Kato, Junya; Miura, Akihiko; Shiotsuki, Masao; Yamashita, Teruo
no journal, ,
To examine long-life vitrification melter, static corrosion tests of electrode materials are conducted to measure corrosion rate. Samples taken from the tests are observed and analyzed using SEM/EDX. As a result, NCF690 and RS311 which are the nickel based alloy show the high corrosion resistance in molten glass because high dense CrO
layer is observed at the glass contact surface.
Yamashita, Teruo; Masaki, Toshio; Shiotsuki, Masao; Yamasaki, Akito*; Ito, Toshiyuki*; Ono, Isamu*; Matsumoto, Shiro*
no journal, ,
no abstracts in English
Miyauchi, Atsushi; Morikawa, Yo; Sasage, Kenichi; Yamashita, Teruo; Shiotsuki, Masao
no journal, ,
no abstracts in English
Sasage, Kenichi; Miyauchi, Atsushi; Morikawa, Yo; Yamashita, Teruo; Shiotsuki, Masao
no journal, ,
Viscosity and specific resistivity of simulated waste glass was measured to investigate characterization of waste glass processed by the long-life vitrification melter. The composition of the simulated waste glass was varied based on 8 cases of assumed spent fuel conditions and reprocessing flows including reprocessing of FBR fuel with minor actinides separation. The viscosity of the sample glasses was from 0.5 to 1.8 times that of waste glass with standard composition. The specific resistivity of the sample glasses was from 0.5 to 1.5 times that of standard waste glass.
Nakajima, Masayoshi; Oeda, Mikihiro; Yamashita, Teruo; Shiotsuki, Masao; Kawahara, Hitoshi*; Sato, Akihiro*
no journal, ,
no abstracts in English
Kato, Junya; Miura, Akihiko; Yamashita, Teruo; Shiotsuki, Masao
no journal, ,
no abstracts in English
Yamashita, Teruo; Masaki, Toshio; Kojima, Keizo; Shiotsuki, Masao; Ito, Toshiyuki*; Ono, Isamu*; Matsumoto, Shiro*
no journal, ,
no abstracts in English
Morikawa, Yo; Miyauchi, Atsushi; Nakajima, Masayoshi; Toyoshima, Mikihiro; Yamashita, Teruo; Shiotsuki, Masao; Matsumoto, Shiro*
no journal, ,
no abstracts in English
Sasage, Kenichi; Nakajima, Masayoshi; Yamashita, Teruo; Shiotsuki, Masao; Matsumoto, Shiro*
no journal, ,
no abstracts in English
Yamashita, Teruo; Masaki, Toshio; Nakajima, Masayoshi; Shiotsuki, Masao; Kojima, Keizo; Toyoshima, Mikihiro; Matsumoto, Shiro*
no journal, ,
no abstracts in English
Aoshima, Atsushi; Shiotsuki, Masao; Yamashita, Teruo
no journal, ,
TVF is unique operating vitrification facility in Japan constructed to vitrify HALW from TRP. In TVF, the total number of produced canisters is 247 and about 80% of HALW generated so far still remains in TRP. In TVF, a ceramic type melter was adopted of which design life time is set five years by structural material corrosion. Present melter is the second generation and future exchange of the second melter is inevitable. For the third melter, JAEA has been developing an advanced melter concept with prolonged design life time of twenty years and better noble metal drainability. This concept features two new technologies; skull layer and reverse viscosity operation mode. The former intends to decrease corrosion rate of refractory by forming low temperature glass zone on the surface. The latter intends to decrease viscosity of glass along wall lower than that of inside to remove accumulated noble metalby glass flow along wall. For both technologies, temperature control is a key point.
Kano, Shigeru; Kobayashi, Hidekazu; Yamashita, Teruo; Sasage, Kenichi
no journal, ,
no abstracts in English