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30 巻, 12 号
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深井 佑造1988 年 30 巻 12 号 p. 1076-1083
発行日: 1988/12/30
公開日: 2009/03/31
ジャーナル フリー昭和62年度日本原子力研究所から委託された日本原子力産業会議「核融合反応活用技術調査委員会」で調査された核融合反応の多角的利用の内容を述べる。その項目は,放射性廃棄物消滅処理,放射性同位元素の生産,核燃料の生産,化学燃料合成,直接発電,材料開発,核融合推進ロケット,その他の利用である。これらはDT, DD, D3He核融合反応の中性子,放射光およびプラズマ粒子を利用している。このうち, DT反応を中心として,閉じ込め方式では,磁気閉じ込め,慣性閉じ込め方式を利用した技術を調査した。抄録全体を表示PDF形式でダウンロード (579K) -
橋口 功, 姫野 嘉昭, 根井 弘道1988 年 30 巻 12 号 p. 1084-1091
発行日: 1988/12/30
公開日: 2009/03/31
ジャーナル フリーTemperature of an upper surface of a roof slab or a shield plug of FBR should be maintained to room temperature from a view point of accessability. It is necessary to clarify the heat transfer characteristics in cover gas space, vertical annulus and insulation structure for evaluation of the design items i.e. the thermal loading, displacement, stress and so on.
On the other hand many upper structural components should also be required to have movable functions. Since there is a fear that sodium is continuing to accumulate and solidification occurs in the gap of movable components, it is necessary to clarify the mass transfer characteristics and develop preventive methods.
This report summarizes basic experimental results and experiences concerning the technology above mentioned.抄録全体を表示PDF形式でダウンロード (599K) -
井門 俊治, 辻 龍介1988 年 30 巻 12 号 p. 1103-1106
発行日: 1988/12/30
公開日: 2009/03/31
ジャーナル フリーPDF形式でダウンロード (280K) -
梶村 治彦, 小玉 強, 長野 博夫1988 年 30 巻 12 号 p. 1107-1109
発行日: 1988/12/30
公開日: 2009/03/31
ジャーナル フリーPDF形式でダウンロード (2049K) -
藤井 誠, 関 英治, 田井 一郎, 盛岡 俊彦1988 年 30 巻 12 号 p. 1110-1118
発行日: 1988/12/30
公開日: 2009/03/31
ジャーナル フリーFor the reliable and efficient diagnosis and inspection work of the nuclear power plant equipments, “Diagnosis and Maintenance Support System” has been developed. This system has functions to assist operators or engineers to observe and evaluate equipment conditions based on the experts' knowledge. These functions are carried out through dialogue between the system and users.
This system has two subsystems: diagnosis subsystem and knowledge base edition support subsystem.
To achieve the functions of diagnosis subsystem, a new method of knowledge processing for equipment diagnosis is adopted. This method is based on the concept of “Cause Generation and Checking”. Knowledge for diagnosis is represented with modularized production rules. And each rule module consists of four different type rules with hierarchical structure. With this approach, the system is equipped with sufficient performance not only in diagnosis function but also in flexible man-machine interface.
Knowledge base edition support subsystem (Graphical Rule Editor) is provided for this system. This editor has functions to display and edit the contents of knowledge base with tree structures through the graphic display. With these functions, the efficiency of constructing expert system is highly improved.
By applying this system to the maintenance support of neutron monitoring system, it is proved that this system has satisfactory performance as a diagnosis and maintenance support system.抄録全体を表示PDF形式でダウンロード (701K) -
奥山 邦人, 横田 修一1988 年 30 巻 12 号 p. 1119-1126
発行日: 1988/12/30
公開日: 2009/03/31
ジャーナル フリーIn a high temperature gas cooled reactor (HTGR), high gaseous impurity levels could lead to carbon transport problem. The carbon transport process is based on two chemical reactions occurring in turn. One is the reaction of the impurity species water and/or CO2 with graphite in the core, and the other is that of produced CO and H2 to form C deposit at metal surface.
Carbon deposition occurred on the inner surface of the pressure vessel of the T2 test section in Helium Engineering Demonstration Loop (HENDEL), where the 50t graphite is installed. From the analysis of the deposition, the C was not graphite but amorphous carbon. Chemical reaction should take place.
The levels of H2 and CO in He gas remarkably increased just after increasing the temperature of He gas flowing into the graphite from 700°C to 930°C. The increase of the impurities can be regarded as the result of the reaction of graphite with water absorbed in the atmosphere and outgassing of the products.
It has been shown that the effective method to reduce the C deposition is the He gas purification taking account of the impurity concentration ratios, H2/H2O and/or CO/CO2 based on the thermodynamical equilibrium state.抄録全体を表示PDF形式でダウンロード (613K) -
大西 輝明1988 年 30 巻 12 号 p. 1127-1143
発行日: 1988/12/30
公開日: 2009/03/31
ジャーナル フリーA model for large scale circulation of nuclides was developed, and a computer code named COCAIN was made which simulates this circulation system-dynamically. The natural environment considered in the present paper consists of 2 atmospheres, 8 geospheres and 2 lithospheres. The biosphere is composed of 4 types of edible plants, 5 cattles and their products, 4 water biota and 16 human organs. The biosphere is assumed to be given nuclides from the natural environment mentioned above. With the use of COCAIN, two numerical case studies were carried out; the one is the study on nuclear pollution in nature by the radioactive nuclides originating from the past nuclear bomb tests, and the other is the study on the response of environment and biota to the pulse injection of nuclides into one compartment. From the former case study it was verified that this model can well explain the observation and properly simulate the large scale circulation of nuclides in nature.抄録全体を表示PDF形式でダウンロード (3174K) -
1988 年 30 巻 12 号 p. 1145
発行日: 1988/12/30
公開日: 2009/03/31
ジャーナル フリーPDF形式でダウンロード (106K)
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