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Arakawa, Ryoki; Nosaki, Nobuhisa
JAEA-Technology 2019-018, 157 Pages, 2020/03
JAEA-Technology-2019-018.pdf:12.97MB
The Naraha Center for Remote Control Technology Development has various test facilities for the decommissioning work after the accident of the Fukushima Daiichi Nuclear Power Station, Tokyo Electric Power Company Holdings, and is now promoting external use. In the test facilities, the robot test pool for the underwater robot can be used in different temperature conditions from room temperature to 60
C, maximum setting temperature. In order to clarify the temperature behavior in heating condition, a heating test from room temperature to 60C was performed. The data was obtained this way. From the data, a heat transfer model for evaluating the temperature behavior was investigated, and the temperature evaluation method for the robot test pool was developed. By using the developed evaluation method, the influence of various factors such as flow rate and humidity on the temperature behavior was investigated for the condition of temperature heating, holding (test condition) and cooling. From the investigation, the temperature behavior of the robot test pool was analytically clarified, and a reasonable operation method was proposed. This report summarizes the results of analytical study at the temperature heating, holding and cooling condition.
Arakawa, Ryoki; Nosaki, Nobuhisa
JAEA-Technology 2018-013, 51 Pages, 2019/02
JAEA-Technology-2018-013.pdf:7.75MB
The Naraha Center for Remote Control Technology Development has various test facilities for the decommissioning work after the accident of the Fukushima Daiichi Nuclear Power Station, TEPCO Holdings, and is now promoting external use. In the test facilities, the robot test pool for the underwater robot can be used in different temperature conditions from room temperature to 60C, maximum setting temperature. In order to clarify the temperature behavior in heating condition, a heating test from room temperature to 60C was performed, and obtained the data. From the obtained temperature data, a heat transfer model for evaluating the temperature behavior was investigated, and the temperature evaluation method for the robot test pool was developed. This report summarizes the developed heat transfer model, and also summarizes the temperature evaluation method during heating and cooling conditions. Moreover, user's manual for the temperature evaluation code was also created.
Arakawa, Ryoki; Nosaki, Nobuhisa; Hirata, Yuji*
JAEA-Technology 2018-009, 28 Pages, 2019/01
JAEA-Technology-2018-009.pdf:2.94MB
The Naraha Center for Remote Control Technology Development consists of a mock-up test building and a research management building, and various test facilities are installed in them for the decommissioning work after the accident of the Fukushima Daiichi Nuclear Power Station, Tokyo Electric Power Company Holdings. In the test facilities, the robot test pool for the underwater robot can be tested under temperature conditions raised from room temperature to 60C. Then, for the purpose of grasping the temperature distribution inside of the pool and the temperature rising behavior in temperature raising condition, a temperature heating test with room temperature to 60C. (maximum setting temperature) was performed, and as well as an analytical study was performed. This report summarizes the obtained both experimental and analytical studies.
Minato, Kazuo; ; ; ; ; Iwamoto, K.
JAERI-M 9036, 21 Pages, 1980/08
no abstracts in English
; ; ;
JAERI-M 6894, 60 Pages, 1977/01
no abstracts in English
Tochiyama, Osamu*; Hasegawa, Kazutoshi*; Hara, Keiji*; Kirishima, Akira*; Mihara, Morihiro
no journal, ,
To evaluate the safety of geological disposal of nitrate-containing waste, its heat release rate models were developed using measurement and data analysis by microcalorimetry for understanding mechanism of oxidation-reduction reaction of nitrate and organic waste. The measured curves of microcalorimetry were modeled considering the phase change and the diffusion controlling the pseudo-zero order reaction model of interfacial reactions based on the Arrhenius law.
Nonaka, Kosuke; Mihara, Morihiro; Hara, Keiji*; Tochiyama, Osamu*
no journal, ,
In the case of nitrate-containing waste with organic material (Asphalt waste), thermal runaway reaction might be caused by chemical reaction of nitrate and organic material. In the geological disposal of Asphalt waste, investigation of thermal runaway reaction is important. The temperature that causes thermal runaway reaction (SIT: Self-heating Ignition Temperature) was calculated using the temperature simulation.
Mihara, Morihiro; Hara, Keiji*; Hasegawa, Kazutoshi*; Tochiyama, Osamu*; Adachi, Natsue*; Kirishima, Akira*
no journal, ,
no abstracts in English
Nonaka, Kosuke*; Hirano, Fumio; Mihara, Morihiro; Hara, Keiji*; Tochiyama, Osamu*
no journal, ,
no abstracts in English
Kitagawa, Yoshihiro
no journal, ,
Laser quenching can be locally processed in a shorter time than the conventional method. But, since the quenching depth is shallow, it is limited to some applications. The purpose of this study is to construct a database on laser quenching and to clarify the range of improvement in quenching depth based on the database. In this report, in the process of constructing the database, the internal temperature distribution and temperature transition during laser irradiation were grasped by using the temperature analysis technology, and the heat transfer mechanism during laser quenching was clarified.
Takahashi, Yuta; Enomoto, Mayu*; Kakuda, Ayaka; Sone, Tomoyuki; Osugi, Takeshi; Kuroki, Ryoichiro
no journal, ,
no abstracts in English