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14 巻, 6 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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田中 高穂, 鈴木 弘茂1972 年 14 巻 6 号 p. 274-277
発行日: 1972/06/30
公開日: 2009/04/21
ジャーナル フリーThe thermal diffusivities of carbon materials were determined over the temperature range from 1, 300° to 1, 900°C, by using the modulating eleciron beam method. The thermal conductivities were calculated from the diffusivity values obtained by this method and the values of heat capacity available in published literature. The resulting data was found to possess anisotropic properties, which were attributable to the method of preparation of the materials. The largest anisotropy was observed in pyrolytic graphite, whose ratio of anisotropy was about 100 in this temperature range. The anisotropy ratio of mold pressed natural graphite was about 3, which larger than that of artificial graphite. The thermal conductivities of glassy carbon appeared to be independent of temperature, and were 2.7×10-2, 2.4×10-2 and 2.2×10-2cal/sec·cm·°C for the qualities called GC-30S, GC-30 and GC-20, respectively.抄録全体を表示PDF形式でダウンロード (225K) -
佐伯 正克, 石森 富太郎1972 年 14 巻 6 号 p. 278-282
発行日: 1972/06/30
公開日: 2009/04/21
ジャーナル フリーThe mean ranges of 6 fission fragments (91Y, 95Zr, 99Mo, 132Te, 140Ba and 141Ce) have been defermined in U-Al alloys (4.66, 16.20, 20.15w/o U), UO2 and U3O8 by radiochemical measurement. The results obtained are shown below in mg/cmcm2 units.抄録全体を表示PDF形式でダウンロード (260K) -
川崎 了, 深谷 清, 長崎 隆吉1972 年 14 巻 6 号 p. 283-289
発行日: 1972/06/30
公開日: 2009/04/21
ジャーナル フリーFast neutron irrodiation in the D.F.R. fluences of about 1×1022nvt (>0.1MeV) has been performed on two kinds of cold worked AISI 316 stainless steel pipes (6% and 18% cold work) in the 565° to 660°C range.
Postirradiation examination revealed that fast neutron radiation enhances recovery of the cold worked structure.
The 18% cold worked specimen proved more ductile when irradiated at 565° or 600°C, as compared with non-irradiated sample, but when irradiated at 660°C, severe embrittlement was observed. On the other hand, the 6% cold worked specimen showed neither radiation induced ductility increase nor severe embrittlement.抄録全体を表示PDF形式でダウンロード (2155K) -
松鶴 秀夫, 小山 和男, 和達 嘉樹1972 年 14 巻 6 号 p. 290-294
発行日: 1972/06/30
公開日: 2009/04/21
ジャーナル フリーThe treatment conditions of alkaline flocculation for acidic plutonium liquid wastes was studied, using ferric hydroxide and calcium phosphate as flocculants.
It was found that the decontamination factor DF for ferric hydroxide or calcium phosphate flocculation is about 103 when the plutonium concentration is 6.5×10-3μCi/ml under the treatment conditions of 500ppm flocculant concentration, pH 10-13 and 0.1M salt concentration. In order to obtain higher DF, repetition of treatment is proposed. It was observed that by one repetition of flocculation (ferric hydroxide-ferric hydroxide and ferric hydroxide-calcium phosphate), the DF is enhanced up to 105 or more when the plutonium concentration is 1.6μCi/ml under the treatment conditions described above.
The above results should be useful in planning the treatment process for acidic plutonium liquid wastes by alkaline flocculation.抄録全体を表示PDF形式でダウンロード (280K) -
森内 和之1972 年 14 巻 6 号 p. 295-306
発行日: 1972/06/30
公開日: 2010/01/08
ジャーナル フリーBasic considerations on the significance of personnel dosimeters are discussed, followed by an analytic examination of the factors that affect the precision and accuracy of the dose measurements. The factors are classified into the four categories of: (1) theoretical characteristics based upon the dose measuring principles, (2) quality control techniques applied to the detector elements and measuring instruments, (3) techniques of pre-, and/or post-irradiation treatments, (4) techniques of normalization against dose standards.
Using the national exposure standards issued by ETL, four kinds of personnel dosimeters currently used in Japan (Film-Badge, Pocket Dosimeter, Glass Dosimeter and Thermoluminescence Dosimeter) were inspected. The results obtained are presented with reference to (1) systematically and objectively reconsidered theoretical characteristics such as the energy response, and (2) data indicating the level of reliability of personnel dose monitoring systems available today in Japan.
The results reveal that the reliability is largely dependent on the suitability of the monitoring system for securing good traceability against the dose standards, and on proper post-irradiation treatment. It is concluded that among the four kinds of dosimeters, the film badge system appears to be sometimes most doubtful in accuracy.
In view of the increasing importance of measurements of geneticaly significant dose, medically considered scattering radiation dose, and environmental radiation dose, the reliability of the available personnel dose measurements would appear to call for improvement the world over.抄録全体を表示PDF形式でダウンロード (833K) -
宇尾 光治1972 年 14 巻 6 号 p. 307-310
発行日: 1972/06/30
公開日: 2009/04/21
ジャーナル フリーPDF形式でダウンロード (1351K)
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