Search Results - "Iwai, Yasunori"

Decomposition of methane with various precious metal catalysts for the tokamak exhaust processing by Edao, Yuki, Iwai, Yasunori

“…The Tokamak exhaust processing system (TEP) in the deuterium-tritium fuel cycle for DEMO is the key system where hydrogen isotopes and impurity gases are…”
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Basic concept of JA DEMO fuel cycle by Iwai, Yasunori, Edao, Yuki, Kurata, Rie, Isobe, Kanetsugu

“…In the JA DEMO, the deuterium-tritium (DT) fuel will be supplied by a combination of gas puff, pellet injection and neutral beam injection. Since the…”
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Development of a compact real-time process gas analysis system for tritium accountancy for a DEMO fusion reactor by an application of laser Raman spectroscopy by O’hira, Shigeru, Edao, Yuki, Isobe, Kanetsugu, Iwai, Yasunori

“…•A compact real-time gas analysis system for tritium accountancy using laser Raman system for a DEMO is developed.•Preliminary test results of the proto-type…”
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Thermal stability of ion-exchange Nafion N117CS membranes by Iwai, Yasunori, Yamanishi, Toshihiko

“…The effect of exchanged ions on the thermal stability of Nafion N117CS membranes was investigated by X-ray photoelectron spectra (XPS), thermogravimetric…”
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Technical background on design of DS recombiner for fusion facility by Iwai, Yasunori, Edao, Yuki, Kurata, Rie, Suzuki, Takumi, Isobe, Kanetsugu

“…•Technical background on design of DS recombiner for fusion facility was presented with engineering data.•Water vapor and ammonia lower the efficiency of…”
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Effect of hydrocarbons on the efficiency of catalytic reactor of detritiation system in an event of fire by Edao, Yuki, Sato, Katsumi, Iwai, Yasunori, Hayashi, Takumi

“…Detritiation system of a nuclear fusion plant is mandatory to be designed and qualified taking carefully into consideration all the possible extraordinary…”
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Effect of cation exchange on hydrogen adsorption property of mordenite for isotope separation by Kawamura, Yoshinori, Iwai, Yasunori, Munakata, Kenzo, Yamanishi, Toshihiko

“…Zeolite easily exchanges its cation to another. As a result, pore size changes easily. Cation-exchanged mordenite type zeolite (MOR) has been reported to have…”
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LES/flamelet/ANN of oxy-fuel combustion for a supercritical CO2 power cycle by Kasuya, Hiroki, Iwai, Yasunori, Itoh, Masao, Morisawa, Yuichi, Nishiie, Takayuki, Kai, Reo, Kurose, Ryoichi

“…Large eddy simulation (LES) employing a flamelet model coupled with an artificial neural network (ANN), namely the LES/flamelet/ANN is developed for…”
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Influence on moisture and hydrocarbons on conversion rate of tritium in catalytic reactors of fusion-DEMO detritiation system by Edao, Yuki, Sato, Katsumi, Iwai, Yasunori, Hayashi, Takumi

“…Thoughtful consideration of abnormal events such as fire is required to design and qualify a detritiation system (DS) of a nuclear fusion facility. Since…”
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Recent activities on water detritiation technology in JAEA by Iwai, Yasunori, Kubo, Hitoshi, Ohshima, Yusuke, Noguchi, Hiroshi, Taniuchi, Junichi

“…•Water detritiation technology has been developed for the Japanese fusion DEMO plant.•Durability of an ion exchange membrane was checked with concentrated…”
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Radiation-induced crosslinking of Nafion ® N117CS membranes by Iwai, Yasunori, Hiroki, Akihiro, Tamada, Masao

“…▶ To improve the thermal stability, Nafion ® membranes were soaked in sodium chloride. ▶ The sodium-exchange Nafion ® membranes were irradiated with gamma rays…”
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Investigation on degradation mechanism of ion exchange membrane immersed in highly concentrated tritiated water under the Broader Approach Activities by Iwai, Yasunori, Sato, Katsumi, Yamanishi, Toshihiko

“…•Endurance of Nafion ion exchange membrane immersed into 1.38×1012Bq/kg of highly concentrated tritiated water has been demonstrated.•The formation of free…”
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Radiation deterioration in mechanical properties and ion exchange capacity of Nafion N117 swelling in water by Iwai, Yasunori, Hiroki, Akihiro, Tamada, Masao, Yamanishi, Toshihiko

“…The base form Nafion N117 samples swelling in the oxygen-saturated distilled water were irradiated with γ-rays or with electron beams at various doses up to…”
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Tritium oxidation test by platinum-alumina catalyst under moisture and hydrocarbons atmosphere by Edao, Yuki, Sato, Katsumi, Asahara, Hiroo, Inomiya, Hiroshi, Iwai, Yasunori

“…To design a detritiation system (DS) applicable to a fire event, it is important to investigate influence of moisture and hydrocarbons produced by combustion…”
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Performance of tritium analysis system using inorganic-based hydrophobic platinum catalyst by Edao, Yuki, Iwai, Yasunori, Sato, Katsumi, Hayashi, Takumi

“…•A method combined oxidation catalytic reactor and water bubbler to measure tritium.•A special inorganic-based platinum catalyst enhanced the hydrophobicity.•A…”
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Development of hydrophobic platinum catalyst for oxidation of tritium in JAEA by Iwai, Yasunori, Edao, Yuki, Asahara, Hiroo, Hayashi, Takumi

“…•The reaction rate for tritium oxidation was investigated with hydrophobic catalysts.•The particle size of platinum strongly affected the reaction rate.•The…”
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Development of Pt/ASDBC catalyst for room temperature recombiner of atmosphere detritiation system by Iwai, Yasunori, Sato, Katsumi, Yamanishi, Toshihiko

“…A combined catalytic reactor and water absorber system has been applied in the field of nuclear fusion to control the tritium release into the environment as…”
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Experimental evaluation of tritium oxidation efficiency in the room temperature recombiner by Iwai, Yasunori, Edao, Yuki, Sato, Katsumi, Kondo, Akiko, Asahara, Hiroo, Inomiya, Hiroshi

“…•Conversion efficiency in passive oxidation of hydrogen below 100 ppm drops steeply.•Sufficient tritium conversion rate can be secured by adding hydrogen to be…”
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Change in activity of catalysts for the oxidation of tritium during a fire event by Iwai, Yasunori, Sato, Katsumi, Yamanishi, Toshihiko

“…► We experimentally demonstrated the influence of produced gases from burned low-halogen cable on the activity of catalysts for tritium oxidation. ► At 423K,…”
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Effect of halogenated gas on detritiation efficiency of detritiation system by Iwai, Yasunori, Edao, Yuki, Kondo, Akiko, Sato, Katsumi

“…•Effect of halogenated gas on detritiation efficiency of the detritiation system was investigated.•Noble catalyst alloyed with platinum and palladium showed an…”
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