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JAEA Reports

The Operation manual of the Breath-Mass with a quadrupole mass spectrometer

Hiratsuka, Hajime; Hatano, Toshihisa; Abe, Tetsuya

JAEA-Testing 2013-001, 42 Pages, 2013/05

JAEA-Testing-2013-001.pdf:7.71MB
JAEA-Testing-2013-001(errata).pdf:0.08MB

The Breath-Mass was put in practical use in the development of the gas analysis technology with quadrupole mass specrometer. Features of the Breath-Mass are measurement at short time, high sensitivity and reproducibility. Moreover, on-site measurement was added to features and application of the Breath-Mass in various fields was aimed at. In development of application, lectures of operation with the instrument were required. This report was summarized as operation manual whose contents ware handling, measurement and maintenance.

JAEA Reports

Visualization environment of the large-scale data of JAEA's supercomputer system

Sakamoto, Kensaku; Hoshi, Yoshiyuki*

JAEA-Testing 2013-002, 80 Pages, 2013/11

JAEA-Testing-2013-002.pdf:8.37MB

On research and development of various fields of nuclear energy, visualization of calculated data is especially useful to understand the result of simulation in an intuitive way. Many researchers who run simulations on the supercomputer in Japan Atomic Energy Agency (JAEA) are used to transfer calculated data files from the supercomputer to their local PCs for visualization. In recent years, as the size of calculated data has gotten larger with improvement of supercomputer performance, reduction of visualization processing time as well as efficient use of JAEA network is being required. As a solution, we introduced a remote visualization system which has abilities to utilize parallel processors on the supercomputer and to reduce the usage of network resources by transferring data of intermediate visualization process. This paper reports a study on the performance of image processing with the remote visualization system. The visualization processing time is measured and the influence of network speed is evaluated by varying the drawing mode, the size of visualization data and the number of processors. Based on this study, a guideline for using the remote visualization system is provided to show how the system can be used effectively. An upgrade policy of the next system is also shown.

JAEA Reports

Examination on the long-term practicability of a Doppler Lidar; Data missing rate and comparison of wind direction and speed with the propeller type

Nakano, Masanao; Watanabe, Hitoshi; Sumiya, Shuichi

JAEA-Testing 2013-003, 29 Pages, 2013/11

JAEA-Testing-2013-003.pdf:11.89MB

Since the remote sensing technique for the meteorological observation has been developing these years, the Doppler Lidar is available in the commercial market. Although some investigation organization carried out the examination on the method and application of Doppler Lidars and had generally good results, the duration of the examination was limited in a short period. So it is unknown that the Doppler Lidar can be applicable to the long-term meteorological observation in the nuclear facilities to assess the public dose around nuclear facilities. In order to examine the long-term performance requested by the Japanese guideline for meteorological observation (i.e., the annual and the sequential 30-days missing rate should be less than 10% and 30%, respectively.) and the consistency with the data measured by conventional type, the wind direction and speed was measured by the Doppler Lidar (Windcube WLS7 made by Leosphere Co Ltd.) for one year, then compared with those by the propeller type installed at the top of the meteorological observation tower. As the result, the missing rate of the Doppler Lidar was satisfied with the guideline at the height less than 180 m, and the data at 68 m above the ground level (100 m above sea level) had a good relationship with the propeller data. From this fact, the Doppler Lidar used in this examination is considered to have a practicability for the dose assessment of the public.

JAEA Reports

Immersion test in artificial water and evaluation of strength property on fuel cladding tubes irradiated in Fugen Nuclear Power Plant

Yamagata, Ichiro; Hayashi, Takehiro; Mashiko, Shinichi*; Sasaki, Shinji; Inoue, Masaki; Yamashita, Shinichiro; Maeda, Koji

JAEA-Testing 2013-004, 23 Pages, 2013/11

JAEA-Testing-2013-004.pdf:8.59MB

In the accident of the Fukushima Daiichi Nuclear Power Plant of Tokyo Electric Power Co. accompanying the Great East Japan Earthquake, fuel assemblies kept in the spent fuel pool of reactor units 1-4, were exposed to the inconceivable environment such as falling and mixing of rubble, especially seawater were injected into unit 2-4. In order to evaluate the integrity of the fuel assemblies in spent fuel pools, and in the long-term storage after transported to the common storage pool, the immersion tests were performed using zircaloy-2 fuel cladding tubes irradiated in the advanced thermal reactor Fugen. The immersion liquid was prepared with doubling dilution of artificial seawater, which temperature was 80 $$^{circ}$$C and immersion time was about 336 hours, as assuming the situation of the pool. The results indicated zircaloy-2 cladding tubes had no significant corrosion and no influence on mechanical property by immersion tests with artificial seawater conditions of this work.

JAEA Reports

Operation and management manual of JT-60 experimental data analysis system

Hirayama, Takashi; Morishima, Soichi*

JAEA-Testing 2013-005, 58 Pages, 2014/03

JAEA-Testing-2013-005.pdf:2.37MB

In the Japan Atomic Energy Agency Naka Fusion Institute, a lot of experiments have been conducted by using the large tokamak device JT-60 aiming to realize fusion power plant. In order to optimize the JT-60 experiment and to investigate complex characteristics of plasma, JT-60 experimental data analysis system was developed and used for collecting, referring and analyzing the JT-60 experimental data. Main components of the system are a data analysis server and a database server for the analyses and accumulation of the experimental data respectively. Other peripheral devices of the system are magnetic disk units, NAS (Network Attached Storage) device, and a backup tape drive. This is an operation and management manual the JT-60 experimental data analysis system.

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