巻号一覧
後続誌
35 巻, 7 号
選択された号の論文の4件中1～4を表示しています
- |<
- <
- 1
- >
- >|
-
松岡 理, 熊澤 蕃, 青木 芳朗, 中村 裕二, 武田 篤彦, 草間 朋子, 稲葉 次郎, 田中 靖政1993 年 35 巻 7 号 p. 595-620
発行日: 1993/07/30
公開日: 2010/01/08
ジャーナル フリーPDF形式でダウンロード (1721K) -
特に医療用LINACの漏洩中性子線量の推定丹羽 健夫, 古賀 妙子, 森嶋 彌重, 河合 廣1993 年 35 巻 7 号 p. 638-640
発行日: 1993/07/30
公開日: 2011/02/17
ジャーナル フリーPDF形式でダウンロード (2494K) -
多田 薫, 石井 新一1993 年 35 巻 7 号 p. 641-648
発行日: 1993/07/30
公開日: 2011/02/17
ジャーナル フリーCobalt-based alloys are not desirable for the usage of nuclear plants because of the generation of 60Co. The objective of this study is to develop cobalt-free alloys as alternatives to Cobalt-based alloys utilized under high loads. Potential alternative materials have been selected, and their wear resistance, corrosion resistance and impact Strength are measured and compared with those of cobalt-based alloys.
At applied loads of 49N and 98N, the wear loss for the combination of nitrided XM-19/ Ni-Cr-Mo-Nb alloy is about 1/3 at 298K and 1/5 at 561K comparing with the combination of cobalt-based alloys (Haynes Alloy 25/Stellite 3). The wear loss for nitrided XM-19/CFA alloy is equivalent to that for the combination of cobalt-based alloys. The corrosion resistance in a BWR environment and impact strength for nitrided XM-19/Ni-Cr-Mo-Nb alloy and nitrided XM-19/CFA alloy are equivalent to those for the combination of cobalt-based alloys. Therefore, the combinations of nitrided XM-19/Ni-Cr-Mo-Nb alloy and nitrided XM-19/CFA alloy are alternatives potential to the combination of cobalt-based alloys.抄録全体を表示PDF形式でダウンロード (5340K) -
条件付きシミュレーション法を適用した評価米田 稔, 森澤 眞輔, 佐々木 智彦, 井上 頼輝1993 年 35 巻 7 号 p. 649-661
発行日: 1993/07/30
公開日: 2011/02/17
ジャーナル フリーThe Conditional Simulation, which has developed in the field of geostatistics, is one of the efficient methods to estimate the precision of parameter estimation. It is the method of creating the random fields that have the assumed stochastic characteristics and coincide with the observed data used for conditioning at sampling points. Conditional Simulation was applied to estimate the movement of fallout 137Cs in the environment, and following results were obtained. The uncertainty of the parameters that determined the movement of 137Cs in a paddy environment decreased more greatly by conditioning when the correlation of the parameters and the data used for conditioning was strong than by that when it was weak. There was the tendency for the estimated concentration of 137Cs in rice to come close to observed data as the number of data used for conditioning increased. Therefore, Conditional Simulation seemed to work effectively. The stochastic distribution of the concentration of 137Cs in rice estimated by Conditional Simulation was not normal at all. Therefore, the method that can estimate the stochastic distribution, such as Conditional Simulation, seems to be necessary for estimating the risk of 137Cs in rice.抄録全体を表示PDF形式でダウンロード (2612K)
- |<
- <
- 1
- >
- >|