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JAEA Reports

Training report of the FBR cycle comprehensive training facility in 2000

Sawada, Makoto; Watanabe, Tomoo; Iwasaki, Ryoji*; Sakakibara, Yasuhide; Nagai, Fumio*

JNC TN4410 2001-006, 53 Pages, 2001/06

JNC-TN4410-2001-006.pdf:9.03MB

The FBR Cycle Comprehensive Training Facility constructed in the International Cooperation and Technology Development Center (in Shiraki area) was opened in earnest since October in 2000. The facility is mainly with the aim of encouraging in technical skills of the operators and maintenance engineers in the prototype fast breeder rector Monju and also is offered to another center in JNC and the local community as a global training facility. Its facility consists of the called sodium school and maintenance school. It is able to study widely sodium huddling technologies, such as chemical and physical properties of sodium, sodium loop operating skill, sodium fire extinguish and treatment sodium compound, and counter training for sodium piping leakage at the sodium school. While the nine study models are installed in the maintenance school and the trainees can learn not only related Monju inherent maintenance technology but also some general maintenance skills. During for six months, October 2000 to March 2001, the six sodium training courses were held 22 times and the eight maintenance courses were carried out 11 times. Total participated number is 305 and 75 trainees among of them joined from the community. To do the training effectively, as the evaluation and analysis system of training result, the skill confirmation test of which aims to have a grasp training results quantitatively by themselves was devised and was introduced. Almost of the training course's results were improved remarkably such as that average point after getting training were risen level of 80 point from level of 40 point before training. Like this, it is obvious that their skills of the Monju operators and maintenance engineers are advancing toward to Monju restarting.

Journal Articles

A Luminescence study of ion-irradiated aromatic polymers

Aoki, Yasushi; Namba, Hideki; Hosoi, Fumio; Nagai, Shiro

ACS Symposium Series, 579; Polymeric Materials for Microelectronic Applications,Science and Technology, 0, p.45 - 50, 1994/00

no abstracts in English

Journal Articles

Luminescence measurement of organic polymers during ion irradiation

Aoki, Yasushi; Namba, Hideki; Hosoi, Fumio; Nagai, Shiro

Proceedings of International Conference on Evolution in Beam Applications, p.648 - 651, 1993/00

no abstracts in English

JAEA Reports

JOYO 75MWt Start-up test report; Temperature distribution analysis in the pedestal structure of JOYO

*; *; Nagai, Fumio*; *; *; *; *

PNC TN941 80-54, 103 Pages, 1980/03

PNC-TN941-80-54.pdf:17.0MB

The purpose of this study is to analyze the temperature distribution in the pedestal structure of JOYO whieh support the reactor vessel. The approach in this work has two steps. The first step is to estimate the heat generation rate induced by irradiation in the reaetor. The second step is to culculate the temperature distribution by using the estimated heat generation rate and the boundary condition which have been sampled from operating data of JOYO. The summary of the results are as follows ; (1)The amount of the heat generation rate in the pedestal structure by irradiation is about 140kcal/hr. (2)The temperature at upper inner surface of the pedestal structure interfaced with reactor vessel flange is higher than at lower outer part of the pedestal structure. (8)The temperature distribution in the pedestal strueture is more influenced by cooling eondition rather than by heat generation rate.

Oral presentation

Inelastic neutron scattering on iron-based superconductors

Ishikado, Motoyuki; Nagai, Yuki; Kodama, Katsuaki; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Mizuno, Fumio; Wakimoto, Shuichi; Nakamura, Hiroki; Machida, Masahiko; et al.

no journal, , 

Three years have passed since the discovery of iron-based superconductors, its maximum superconducting transition temperature ($$T_c$$) is 55 K, resulting in second highest material system next to cuprate high-$$T_c$$ superconductors. Among various material systems in iron-based superconductors, we have systematically studied on LaFeAsO$$_{1-x}$$F$$_x$$ ($$T_c^{max}$$=28 K) of first discovered system and BaFe$$_2$$(As,P)$$_2$$ which have recently attracted tremendous attention by the discovery of line nodes in its order parameter. In the session, we present recent results on "spin fluctuation and superconductivity on LaFePO$$_{0.9}$$", and "symmetry of order parameter on BaFe$$_2$$(As,P)$$_2$$ by inelastic neutron scattering" studied by the chopper spectrometer 4SEASONS (J-PARC).

Oral presentation

Inelastic neutron scattering studies on iron-based high-$$T_c$$ superconductors

Ishikado, Motoyuki; Kodama, Katsuaki; Wakimoto, Shuichi; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Mizuno, Fumio; Nagai, Yuki; Nakamura, Hiroki; Machida, Masahiko; et al.

no journal, , 

Among various iron-based superconductors, we have systematically studied on LaFeAsO$$_{1-x}$$F$$_x$$ ($$T_c^{max}$$=28 K) and BaFe$$_2$$(As,P)$$_2$$ ($$T_c^{max}$$=31 K) by the Fermi chopper spectrometer 4SEASONS (J-PARC). We will discuss the possible relation between high-$$T_c$$ superconductivity and magnetic fluctuation based on our inelastic neutron scattering results.

Oral presentation

Magnetic scattering on Fe-based superconductors La1111 and BaFe$$_2$$(As,P)$$_2$$

Ishikado, Motoyuki; Nagai, Yuki; Kodama, Katsuaki; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Mizuno, Fumio; Wakimoto, Shuichi; Nakamura, Hiroki; Machida, Masahiko; et al.

no journal, , 

We report systematic studies on Fe-based superconductors LaFeAsO$$_{1-x}$$F$$_x$$ ($$T^{max}_{rm c}$$ =28 K) and BaFe$$_2$$(As,P)$$_2$$ ($$T^{max}_{rm c}$$ =31 K) by using inelastic neutron scattering measurement.

Oral presentation

Spin resonance on nodal iron-based high-TC superconductors

Ishikado, Motoyuki; Kodama, Katsuaki; Wakimoto, Shuichi; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Mizuno, Fumio; Nagai, Yuki; Nakamura, Hiroki; Machida, Masahiko; et al.

no journal, , 

We have systematically studied nodal iron-based superconductor LaFePO$$_{0.9}$$ ($$T_{rm c}$$=5 K) and BaFe$$_2$$(As,P)$$_2$$ ($$T_{rm c}$$=30 K) by using Fermi chopper spectrometer 4SEASONS (J-PARC) and Triple Axis Spectrometer (TAS-1) at JRR-3. In the session, we will discuss the relation between superconductivity and spin fluctuation.

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