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JAEA Reports

Mock-up test of the modified STACY (Performance check of water feed and drain system)

Seki, Masakazu; Maekawa, Tomoyuki; Izawa, Kazuhiko; Sono, Hiroki

JAEA-Technology 2017-038, 52 Pages, 2018/03

JAEA-Technology-2017-038.pdf:4.6MB

The Japan Atomic Energy Agency is conducting a reactor modification project of the Static Experiment Critical Facility (STACY). In the modification, STACY is to be converted from a thermal reactor using solution fuel into that using fuel rods and light water moderator. Reactivity of the modified STACY core is controlled by the water level fed in the core tank as well as the present STACY. In order to verify the basic design of the water feed and drain system of the modified STACY, we constructed a mockup test apparatus with almost the same structure and specifications as the modified STACY. In the mockup test, performance checks were pursued regarding limitation of maximum flow of water feeding, adjustment of the flow rate of water feeding, stop of water feeding and others. This report describes the outline and results of the mock-up test of the water feed and drain system of the modified STACY.

JAEA Reports

Preliminary examination about the seal leak using the photocoagulation resin (Joint research)

Ooka, Makoto; Maekawa, Yasunari; Tomizuka, Chiaki; Murakami, Tomoyuki*; Katagiri, Genichi*; Ozaki, Hiroshi*; Kawamura, Hiroshi

JAEA-Technology 2015-003, 31 Pages, 2015/03

JAEA-Technology-2015-003.pdf:3.95MB

An action for the decommissioning of the Fukushima Daiichi Nuclear Power Station (Tokyo Electric Power Company) is pushed forward now. For fuel debris Remove, it is necessary to fill the Primary Containment Vessel (PCV) with water. Because a coolant leaks out from the PCV, it becomes the most important problem to seal leak the coolant. Nuclear Plant Decommissioning Safety Research Establishment has examined the method of seal leak using the photocoagulation resin. However, originally the photocoagulation resin is used as coating or the painting, and the applicability to seal leak water is unknown. This report describes the result that examined the applicability to seal leak using photocoagulation resin.

Journal Articles

First-principles study of electronic and magnetic structures of CoFeB|Ta and CoFe|TaB heterostructures

Hamada, Tomoyuki*; Ono, Takashisa*; Maekawa, Sadamichi

Molecular Physics, 113(3-4), p.314 - 318, 2014/07

 Times Cited Count:3 Percentile:13.68(Chemistry, Physical)

Journal Articles

Implementation of the DFT+U method and constrained DFT calculations for $$U$$ and $$J$$ within a Pseudopotential formalism; Application to FeO and LaVO$$_{3}$$

Hamada, Tomoyuki*; Ono, Takashisa*; Maekawa, Sadamichi

Journal of the Korean Physical Society, 62(12), p.2155 - 2159, 2013/06

 Times Cited Count:2 Percentile:12.72(Physics, Multidisciplinary)

Journal Articles

Spin transfer torque in MTJs with synthetic ferrimagnetic layers by the Keldysh approach

Ichimura, Masahiko*; Hamada, Tomoyuki*; Imamura, Hiroshi*; Takahashi, Saburo*; Maekawa, Sadamichi

Journal of Applied Physics, 109(7), p.07C906_1 - 07C906_3, 2011/03

 Times Cited Count:4 Percentile:20.9(Physics, Applied)

Oral presentation

Evaluation of nuclear characteristics and safety design examination of modified STACY for critical experiments on fuel debris, 2; Evaluation of nuclear characteristics and reactivity

Izawa, Kazuhiko; Maekawa, Tomoyuki; Aoyama, Yasuo; Sono, Hiroki; Ogawa, Kazuhiko; Yanagisawa, Hiroshi; Miyoshi, Yoshinori

no journal, , 

no abstracts in English

Oral presentation

Remote technology development for function advancement of research base, 5; Applicability examination for leakage sealing using the photo-curable resin

Shimada, Kozue; Ooka, Makoto; Maekawa, Yasunari; Tomizuka, Chiaki; Murakami, Tomoyuki*; Katagiri, Genichi*; Ozaki, Hiroshi*; Aoyagi, Katsuhiro*; Kawamura, Hiroshi

no journal, , 

no abstracts in English

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