巻号一覧
後続誌
16 巻, 5 号
選択された号の論文の6件中1～6を表示しています
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黒鉛の場合を中心に岩田 忠夫1974 年 16 巻 5 号 p. 231-240
発行日: 1974/05/30
公開日: 2009/04/21
ジャーナル フリーA review is presented on the experimental studies of atomic displacements, i.e., the production of lattice defects in graphite by irradiations with energetic particles.
The following fundamental properties of the process of defect production are discussed: (1) The anisotropic threshold energy for atomic displacement, (2) the displacement cascade process, and (3) the effect of irradiation temperature on such atomic displacements.抄録全体を表示PDF形式でダウンロード (702K) -
水田 浩1974 年 16 巻 5 号 p. 241-246
発行日: 1974/05/30
公開日: 2009/04/21
ジャーナル フリーThe most important safety problem concerning the LMFBR is related to core component damage caused by molten fuel coolant interaction. This problem has been reviewed under the items of out-of-pile test, in-pile test and analytical models. The elements of the physical geometry relevant to the out-of-pile test are shocktube, tank, jet injection, mixing and fuel pin. The major difficulty is to melt the large amount required of fuel (10kg). The in-pile test facilities operative today are TREAT, ETR, CABRI and HFR. Almost all the analytical models are based on the Cho-Wright model.抄録全体を表示PDF形式でダウンロード (250K) -
菅野 昌義, 古川 和男, 古橋 晃, 安川 茂, 河村 和孝, 大野 英雄, 大道 敏彦, 加藤 義夫, 菅野 昌義, 古川 和男1974 年 16 巻 5 号 p. 249-273
発行日: 1974/05/30
公開日: 2010/01/08
ジャーナル フリーPDF形式でダウンロード (3071K) -
山林 尚道, 四方 英治, 正木 典夫, 岡根 章五1974 年 16 巻 5 号 p. 276-281
発行日: 1974/05/30
公開日: 2010/03/08
ジャーナル フリーThree types of Al capsules, sealed hermetically by cold-welding, were manufactured for radioisotope production in nuclear reactors. The cold-welding was performed simply by drawing the capsules through a steel die or by pressing between steel dies, thus eliminating the demerits inherent in arc-welding, currently used. The capsules thus coldwelded were submitted to airtightness and burst tests in order to ascertain the practical acceptability of the resulting-welds.
It was found that the airtightness of the capsules was reliably high up to 300°C, and tests with He leak detector showed that the leak rate was below 10-8atm·cc/sec in more than 95% of the capsules.
The burst pressure of the capsules exceeded 25kg/cmcm2 at room temperature, but decreased with rising temperature, and at 300°C it was 1/2-1/4 of the room temperature value. Most of the capsules subjected to burst test broke at the position of the cold-weld. The exceptions were some of the die-press welded capsules, which ruptured in the side wall.
These tests, confirmed that the present method of sealing by cold-welding should be a safe and easy means of preparing capsules for radioisotope production.抄録全体を表示PDF形式でダウンロード (496K) -
等断面積流路における臨界流の理論安達 公道1974 年 16 巻 5 号 p. 282-288
発行日: 1974/05/30
公開日: 2009/04/21
ジャーナル フリーAs a sequel to the preceding first report, a description is given of results obtained on the application of the general theory of high-speed two-phase flow to a critical discharge flow through a constant-flow-area channel. In this case, the flow cannot be satisfactorily expressed without considering pipe friction, because this constitutes the sole factor that changes the flow in the axial direction.
It is shown that when the stagnant pressure and the stagnant steam quality in a highpressure reservoir are given, two-phase flow parameters such as steam quality, the linear velocities of steam and water, slip ratio and void fraction at any point along the channel can be derived from the pressure prevailing at the given point. It is also demonstrated that two-phase critical flow can be defined as a flow in which the integrated frictional pressure loss reaches a limit and can increase no further.
Moreover, if the channel characteristics in respect of two-phase frictional pressure loss are known, the above-mentioned two-phase flow parameters can be determined as function of the position along the channel.
Numerical calculations show that the critical pressure obtained with the author's theory agrees well with experimental results. At the same time it has been found that the frictional pressure loss of violently flashing two-phase flow is markedly higher than the value predicted by some of the current correlations derived for other kinds of flow.抄録全体を表示PDF形式でダウンロード (405K) -
1974 年 16 巻 5 号 p. 290
発行日: 1974年
公開日: 2009/04/21
ジャーナル フリーPDF形式でダウンロード (61K)
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