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17 巻, 7 号
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1975 年 17 巻 7 号 p. 329-348
発行日: 1975/07/30
公開日: 2010/04/19
ジャーナル フリーPDF形式でダウンロード (1610K) -
山室 信弘, 椙山 一典, 浅見 明1975 年 17 巻 7 号 p. 349-356
発行日: 1975/07/30
公開日: 2010/04/19
ジャーナル フリーThe conference on "Nuclear Cross Sections and Technology", Washington, 3 to 7 March 1975, is briefly reported, with particular reference to the aspect of cross-section measurements. More than 200 papers were presented to the Conference, attended by about 350 participants, one quarter of whom came from abroad.
The major subjects of the Conference included microscopic cross section measurements and applications of cross section data to reactor engineering. In respect of the first-mentioned subject, sessions were held on such subjects as instruments and techniques, cross sections and flux standards, evaluation and calculation of cross sections, cross section measurements on fissionable and non-fissionable isotopes. A brief account is also given on the last-mentioned subject of reactor engineering applications.抄録全体を表示PDF形式でダウンロード (614K) -
「欧文誌」投稿者のために吉田 正男1975 年 17 巻 7 号 p. 357-358
発行日: 1975/07/30
公開日: 2010/04/19
ジャーナル フリーPDF形式でダウンロード (152K) -
宮 健三, 岡村 和夫, 安藤 良夫1975 年 17 巻 7 号 p. 365-375
発行日: 1975/07/30
公開日: 2010/04/19
ジャーナル フリーThe fuel of a fast burst reactor is subject to vibrations occasioned by rapid temperature rise when the reactivity in the core is suddenly increased.
This paper covers an analysis of such fuel vibration in the fast neutron source reactor "YAYOI" under pulsed operation, with use made of the finite element method, and adopting as parameters the rate of temperature rise and the spatial temperature distribution. An analytical solution is also obtained assuming that the fuel is under plane stress, for comparison with the results derived by the finite element method. Agreement between the two results is very good within the bounds of the plane stress condition.
The results indicate that the amplitudes of dynamic displacement and stress increase with rising rate of energy release. The relation between these quantities is presented.抄録全体を表示PDF形式でダウンロード (583K) -
パーコレートする液に含まれる核種の移動井上 頼輝, 森澤 眞輔, 馬原 保典1975 年 17 巻 7 号 p. 376-384
発行日: 1975/07/30
公開日: 2010/04/19
ジャーナル フリーIf it is desired to evaluate the potential hazard caused by radioactive wastes buried in the ground, it is necessary to know how radionuclides would migrate through soil especially through aerated zones. However, the rate of underground migration of nuclides has so far been studied far less extensively in aerated zones than in saturated zones, on account of many difficulties underlying such studies.
The present paper covers an experimental study based on a model stratum, aimed at obtaining information on phenomena occurring in an aerated zone. Some significant results have been obtained, such as that: (1) The concept of time-transformation factor (Kf-factor) is useful in the present circumstances for evaluating the migration of nuclides in aerated zones, (2) radionuclides would be retained in an aerated zone at least as effectively as in a saturated zone, and (3) the movement of 90Sr in an aerated zone could be predicted from the observed behavior of 90Y, which is a daughter of 90Sr, because 90Y migrates faster than 90Sr.抄録全体を表示PDF形式でダウンロード (522K)
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