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Eguchi, Shohei; Koike, Sumio; Takemoto, Noriyuki; Tanimoto, Masataka; Kusunoki, Tsuyoshi
UTNL-R-0492, p.9_1 - 9_8, 2016/03
no abstracts in English
Shimazaki, Yosuke; Sawahata, Hiroaki; Yanagida, Yoshinori; Shinohara, Masanori; Kawamoto, Taiki; Takada, Shoji
no journal, ,
In High Temperature Engineering Test Reactor (HTTR), three neutron holders containing 
Cf with 3.7GBq for each are loaded in the graphite blocks and inserted into the reactor core as a neutron startup source (NS) which is changed at the interval of approximately 7 years. These neutron holders containing the neutron sources are transported from the dealer's hot cell to HTTR using the transportation container. The holders loading to the graphite block are carried out in the fuel handling machine maintenance pit of HTTR. Technical issues were recognized for the transportation container in the past two exchange works for the safety handling work of NS holder. On the other hand, it was required that an overhaul of the conventional transportation container or development of a new transportation container because the conventional transportation container was manufactured about twenty years ago. Therefore, the development of a new transportation container for NSs, which can solve these technical issues with low cost, was carried out.
Kai, Takeshi
no journal, ,
A general purpose particle transport simulation code, PHITS, that has been developed by JAEA and some institutions can simulate the radiation behavior in arbitrary 3-D systems using nuclear reaction models, nuclear data libraries and so on. Then, this code is applied to researches of several fields which are related to radiation transport phenomena. However, as the code has a cutoff energy of 1 keV for electron transport in mediums, in addition radiolysis of the mediums are not taken into account for calculation in PHITS, application of PHITS has been limited to radiation chemistry. On the other hand, we also have developed electron behavior calculation code in water below 100 keV to imply a formation of complexed DNA damages involved in the electron, and electron impact cross sections data for energy range below 1 keV, especially. In this presentation, we report our outcomes for behavior analysis of the low energy electron in water, and implementation plan of our code to PHITS so as to application for radiation chemistry.
Honda, Yuki; Aono, Tetsuya; Sekita, Kenji; Tochio, Daisuke; Takada, Shoji
no journal, ,
The Characteristic confirmation test has been demonstrating by using the High Temperature engineering Test Reactor (HTTR) to confirm the High Temperature Gas Reactor (HTGR) characteristics, which are safety characteristics and various heat utilization. The characteristic confirmation test by using the HTTR consists of the limit performance test and nuclear heat supply fluctuation test. The nuclear heat supply fluctuation testis planned to be carried out after restarting of the HTTR. Towards the realization of industrial utilization of a HTGR cogeneration system as an extension of a nuclear plant, it is important to ensure reactor safety in the case that thermal-load of the facility is fluctuated or lost. The HTTR is under long-term shutdown. However, two nuclear heat supply fluctuation tests were demonstrated without nuclear heating. This report shows outline, progress and results of characteristic confirmation test.
Gondai, Yoji; Yamamoto, Masaya; Sekine, Takashi
no journal, ,
no abstracts in English
Matsui, Yutaka; Suwa, Masayuki; Wada, Shigeru
no journal, ,
no abstracts in English