Superconducting MgB thin film detector for neutrons

Ishida, Takekazu*; Nishikawa, Masatoshi*; Fujita, Yoshifumi*; Okayasu, Satoru; Katagiri, Masaki*; Sato, Kazuo*; Yotsuya, Tsutomu*; Shimakage, Hisashi*; Miki, Shigehito*; Wang, Z.*; et al.

Journal of Low Temperature Physics, 151(3-4), p.1074 - 1079, 2008/05

https://doi.org/10.1007/s10909-008-9790-x

The superconducting neutron detector using high-quality B-enriched MgB thin films at higher operating temperatures has been proposed, where a resistance change induced by the nuclear reaction of neutron and B in MgB is used to detect a neutron. Cold neutrons from a nuclear research reactor irradiated the MgB detector, and the output voltage was clearly observed through a low-noise amplifier by using a digital oscilloscope. The out-of-equilibrium thermodynamics was investigated by means of the time-dependent Ginzburg-Landau equations by using the Earth Simulator.

Development of the Self Moving Survey System

Ishikawa, Hisashi; Nemoto, Norio; Izaki, Kenji; Kobayashi, Hirohide; Tanizawa, Teruaki*; Kanazawa, Yoshito*

JNC TN8400 2004-008, 124 Pages, 2004/05

JNC-TN8400-2004-008.pdf:58.81MB

In order to strengthen the functions of the self moving survey system, the design of the truck and the data transmission system, the investigation of the handling function and the durability test assumed under the disaster environment were executed.As the basic performance of the self moving survey system, it was demanded to have the functions in order to run on the bumpy road, go up and down the stairs and open and shut of the door. And the remote control by the PHS line or the SS wireless is adopted as an operational method. Moreover, as the function that can monitor the disaster situation in the facility, it was assumed the design that make modular the measurement equipments, which mainly measure alpha ray, gamma ray and neutron, and installed it.In consideration of the radiation monitoring under the environment that assumes the critical accident and a fire and the explosion etc. heat test, humidity test, radiation test, and aerosol (smoke) test for monitoring equipments were executed. As a result of the tests, it was confirmed that all equipment except the semiconductor detector operated normally.

Critical experiments and characteristic measurement for JRR-2

JRR-2 Critical Experiments Group; Kambara, Toyozo; Shoda, Katsuhiko; Hirata, Yutaka; Shoji, Tsutomu; Kohayakawa, Toru; Morozumi, Minoru; Kambayashi, Yuichiro; Shitomi, Hajimu; Kokanezawa, Takashi; et al.

JAERI 1025, 62 Pages, 1962/03

JAERI-1025.pdf:4.6MB

no abstracts in English

Special monitoring for the persons working at central building in Tokai Reprocessing Plant

Takada, Chie; Nakagawa, Takahiro; Yamazaki, Takumi; Ishikawa, Hisashi; Momose, Takumaro

no journal, , 

A special monitoring was performed for the persons working at Central Building in Tokai Reprocessing Plant in September, 2013. One person of the monitored subjects was estimated that he took a tiny amount of radioactive materials accidentally.

The Effect of room-scattered ray on the calibration of survey meter

Hoshi, Katsuya; Yoshida, Tadayoshi; Tsujimura, Norio; Ishikawa, Hisashi

no journal, , 

no abstracts in English

Preset status and issues of dosimetry for the lens of the eye at MOX-fuel plant

Yamazaki, Takumi; Takada, Chie; Tsujimura, Norio; Ishikawa, Hisashi

no journal, , 

no abstracts in English

Study of method of measurement of the -ray 3mm dose equivalent and protection measures of the lens of eyes, 1; Ionization chamber

Takimoto, Misaki; Yamazaki, Takumi; Imahashi, Atsushi; Hoshi, Katsuya; Kawasaki, Takashi; Yoshida, Tadayoshi; Takada, Chie; Tsujimura, Norio; Okada, Kazuhiko; Ishikawa, Hisashi

no journal, , 

no abstracts in English