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41 巻, 3 号
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1999 年 41 巻 3 号 p. 147-173
発行日: 1999/03/30
公開日: 2010/04/19
ジャーナル フリーPDF形式でダウンロード (6645K) -
内藤 正則, 安藤 泰正, 氏田 博士1999 年 41 巻 3 号 p. 174-201
発行日: 1999/03/30
公開日: 2010/04/19
ジャーナル フリーPDF形式でダウンロード (29930K) -
セルオートマトン法による流体解析の現状と今後の展望加藤 恭義1999 年 41 巻 3 号 p. 202-218
発行日: 1999/03/30
公開日: 2010/04/19
ジャーナル フリーSince most of complex phenomena comprise of various elementary processes e.g., fluid flow, heat conduction, phase transition, chemical reaction, structural deformation, and these processes interact each other nonlinearly, the complex phenomena cannot be easily clarified by such the conventional topdown approaches as describe phenomena by using differential equations. In contrast to the topdown approaches where the differential equations are located at the top of the analysis procedures, there are bottomup approaches where phenomena are reproduced by local interaction of particles or cells. Cellular automata are one of the typical bottomup approaches. The basic principle, computer simulation results, and massively parallel processors for the cellular automata are reviewed and perspectives of the bottomup approach are discussed on clarification of the complex phenomena in nuclear plants. The computer simulations mainly deal with fluid flows and phase interfacial phenomena.抄録全体を表示PDF形式でダウンロード (16415K) -
原子力技術の新しい飛躍に向けて北本 朝史1999 年 41 巻 3 号 p. 219-235
発行日: 1999/03/30
公開日: 2010/04/19
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システムの炉外実証試験計画稲垣 嘉之, 武田 哲明, 西原 哲夫, 羽田 一彦, 林 光二1999 年 41 巻 3 号 p. 250-257
発行日: 1999/03/30
公開日: 2010/04/19
ジャーナル フリーJapan Atomic Energy Research Institute has been constructing a 30-MWt HTGR, named HTTR, to develop technology and to demonstrate effectiveness of high-temperature nuclear heat utilization. A hydrogen production system by natural gas steam reforming is to be the first heat utilization system of the HTTR. This report describes an out-of-pile demonstration tests program required for hydrogen production system coupling with the HTTR. The demonstration tests are classified into three parts as follows; (1) an out-of-pile hydrogen production test to develop operational and control technologies and to demonstrate high-temperature components such as a steam reformer and so on under simulated operational conditions, (2) a material test of catalyst tube, which is the pressure boundary between coolant (helium gas) and process gases, to estimate the effect of corrosion and hydrogen embrittlement on material strength (Hastelloy XR), and (3) a hydrogen permeation test to estimate tritium transportation from reactor to produced hydrogen. As for the out-of-pile hydrogen production test, a 1/30-scale test equipment which simulates key components downstream from an intermediate heat exchanger of the HTTR is under construction aiming at completion in 2000. The catalyst tube material and hydrogen permeation tests have started and are to be continued to 2000.抄録全体を表示PDF形式でダウンロード (848K) -
坂本 隆一, 堤 正博1999 年 41 巻 3 号 p. 258-265
発行日: 1999/03/30
公開日: 2010/04/19
ジャーナル フリーA carborne γ-ray survey system was developed aiming at implementation of environmental radiation investigation in and around Chernobyl area after the accident. This system consists of a dose rate meter, a GPS and a personal computer, and acquires γ-ray dose rates and positional data using two serial ports of the computer. It is indispensable to acquire these two kinds of data simultaneously for carborne γ-ray survey in a large area. A feature of the system is to be able to get these data continuously by means of a simple programming. This system has been used in and around Chernobyl area for a few years, and it has worked without any troubles. The outline of this survey system, which is applicable for configuration of environmental radiation data acquisition system is reported with some results in Chernobyl.抄録全体を表示PDF形式でダウンロード (5467K)
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