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43 巻, 3 号
選択された号の論文の5件中1～5を表示しています
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安俊 弘, 池本 一郎, 梅木 博之, 小野 幸雄, 鈴木 篤之, 田中 博, 土江 保男, 松井 一秋, 三島 毅, 諸葛 宗男, 山路 ...2001 年 43 巻 3 号 p. 194-205
発行日: 2001/03/30
公開日: 2010/03/08
ジャーナル フリーPDF形式でダウンロード (8156K) -
宮崎 慶次2001 年 43 巻 3 号 p. 206-218
発行日: 2001/03/30
公開日: 2009/04/21
ジャーナル フリーSummaries are described on the sodium combustion experiments conducted by HEDL (F1, F2, F4, F5), KfK, Cadarashe (IGNA 402 & 2002, IGNA 3602 & 3604), the former PNC, etc. The sodium fires of Almeria Solar Plant and ILONA Test Facility are taken up as the examples of large-scale accidents. Fast breeder reactor (FBR) safety considerations are discussed, with attentions paid to the integrity of steel liner and sodium-concrete reaction, in relation to the secondary sodium leakage of MONJU. The author suggests that injection of nitrogen gas is an effective measure against sodium fires, suppressing the temperature rises, chemical reactions and also surely excluding a hydrogen explosion in case of sodium-concrete reaction.抄録全体を表示PDF形式でダウンロード (9128K) -
第11回 代表的な原子炉と炉物理平川 直弘, 岩崎 智彦2001 年 43 巻 3 号 p. 237-249
発行日: 2001/03/30
公開日: 2009/04/21
ジャーナル フリーPDF形式でダウンロード (13658K) -
落合 誠, 仏円 隆, 三浦 崇広, 黒田 英彦, 空本 誠喜, 兼本 茂2001 年 43 巻 3 号 p. 275-281
発行日: 2001/03/30
公開日: 2009/04/21
ジャーナル フリーA new method to estimate crack depth based on laser-induced surface acoustic wave (SAW) is proposed. Laser ultrasonic technique that uses laser beams for generation and detection of ultrasonic waves allows remote and non-contacting inspection. Moreover, since laser-induced SAW has a wide frequency band, it also offers crack-depth measurement using a frequency analysis. To confirm the performance, some feasibility tests using artificial slits were performed. Simulated surface cracks were machined on the type 304 stainless steel plates; each of them had a width of about 100μm and a depth of from 0.2mm to 1.5mm. The location and the depth of the slits were estimated from the detected waves by both the pulse-echo measurement and a frequency analysis. Results of the frequency analysis show that a surface slit behaves as the low pass filter to the laser-induced SAW and the step response time of the transfer function has linear relationship with the slit-depth. Consequently, it is possible to detect small cracking having 0.2mm depth and good agreement can be achieved between measured and nominal depths.抄録全体を表示PDF形式でダウンロード (2767K) -
塚田 毅志, 高橋 恵樹2001 年 43 巻 3 号 p. 282-298
発行日: 2001/03/30
公開日: 2010/03/08
ジャーナル フリーA process simulation code for an entire nuclear fuel reprocessing plant was developed. The code can be used on a personal computer. Almost all of the equipment in the reprocessing plant is included in the code and the mass balance model of equipment is based on the distribution factors of flow-out streams. Each model of equipment is connected between the outlet flow and the inlet flow according to the process flow sheet.
We estimate the amount of DBP from TBP degradation in the entire process by using the developed code. The DBP concentration at the Pu refining process becomes the highest, which is generated from the TBP degradation caused by a radiation from the extracted Pu in solvent. On the other hand, very little of DBP is generated in the U refining process. We therefore propose simplification of the solvent washing process and volume reduction of the alkali waste solution in the U refining process.
We also analyzed the amount of DBP when high burnup UO2 fuels and LWR-MOX fuels are reprocessed. It is concluded that two times amount of DBP is generated during the high burnup UO2 fuels and LWR-MOX fuels reprocessing but this amount of DBP is not so much to affect the process performance.抄録全体を表示PDF形式でダウンロード (16474K)
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