巻号一覧
後続誌
2 巻, 11 号
選択された号の論文の8件中1～8を表示しています
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核分裂生成物および硝酸の挙動に及ぼす影響石原 健彦, 辻野 毅, 山本 寛1960 年 2 巻 11 号 p. 659-670
発行日: 1960/11/30
公開日: 2009/02/12
ジャーナル フリーRadiation damage to 30 vol.% TBP (Tributyl phosphate)/Kerosene solvent was investigated on the behavior changes of fission products and nitric acid in extraction and in stripping with 0.01 N nitric acid at 25°C.
In these extraction-stripping experiments, three types of solvent were used; namely, 60Co γ-ray irradiated (104-108r) solvent, non-irradiated solvent and synthetic “damaged solvent”, or DBP (Dibutyl phosphate)-MBP (Monobutyl phosphate), Butanol or Pyrophosphoric acid added TBP/Kerosene.
It has been revealed in beaker scale experiments that 95Zr-95Nb is extremely effected in extraction-stripping with radiation damaged and synthetic damaged solvent comparing with 106Ru-106Rh, 131l, 144Ce_144Pr and gross fission products, and that its behavior change depends mainly on the formation of DBP-MBP, but not on that of Butanol or Pyrophosphate.
106Ru-106Rh is hardly effected in extraction with damaged solvent and is effected only in stripping from damaged solvent.
Neither 144Ce-144Pr nor nitric acid is influenced by radiation damage to the solvent.
131l behavior change is different from others.
Emulsion formation was observed only in 95Zr-95Nb extraction with 107r or more irradiated and DBP-MBP added solvent (0.1g or more/l-solvent).
Settling time or phase separation time changes may not affect the process significantly except in the case of emulsion formation.抄録全体を表示PDF形式でダウンロード (1092K) -
鳥飼 欣一, 堀 雅夫, 山崎 利1960 年 2 巻 11 号 p. 671-681
発行日: 1960/11/30
公開日: 2009/03/27
ジャーナル フリーThe fluid flow resistance through the round tube in boiling is different from the two-phase flow, but it is not very identified.
It has been definitely shown that as the result of semi theoretical analysis and experiments in net boiling of forced flow in 20∅ tube at 3 to 13m/sec, 2 to 150 ata and in 14×105kcal/m2hr, the turbulency of flow by turbulent energy based upon the detach from the tube wall and growth of the bubbles is generated, and the fluid flow resistance is also changed. But this turbulency is not larger than the turbulency of normal flow in tube except cases of low flow velocity or low pressure, and that effect is neglisible in practice. Then the coefficient of frictional flow resistance through the round rough tube in normal turbulent flow is available to in heigh velocity flow at heigh pressure in net boiling too.抄録全体を表示PDF形式でダウンロード (563K) -
井口 明, 天野 恕, 田中 重男1960 年 2 巻 11 号 p. 682-684
発行日: 1960/11/30
公開日: 2009/03/27
ジャーナル フリー48Ti, 51Vの(α, n)反応の断面積をEα=31 MeVまでStacked foil法を使った放射化法で測った。
これらの反応は51Crおよび54Mnの無担体放射性同位元素の製造に対しても考慮さるべき経路の1つであろう。照射には核研160cmサイクロトロンを使用し,ビームの強さはファラデー・カップを用いて測った。Ti-ターゲットとしては約1.8mg/cm2の金属箔を, V-ターゲットとしてはAl箔の上にV2O5を少量のクリヤー・ラッカーと共に吹きつけたものを用いた。照射後短寿命放射能を崩壊させてのち, 51Crの325keV-γ線, 54Mnの840keV-γ線を1 3/4;×2in.の井戸型シンチレータで測定した。放射能の絶対値はγ線の光電ピークの計算値に325, 840keVのγ線に対してのそれぞれの効率0.4, 0.085を用いて求めた。得られた反応断面積の結果は48Ti(α, n)51Cr反応ではEα=14MeVで約700mbの,51V(α, n)54Mn反応ではEα=14MeVで約559mbの最大値を示した。
この結果を製造に便利なようにthick-target yield(厚いターゲットによる反応収率)に換算すると
48Ti(α, n)51Crに対しては21.5μc/μA⋅hr
51V(α, n)54Mnに対しては2.54μc/μA⋅hr
となった。抄録全体を表示PDF形式でダウンロード (148K) -
1960 年 2 巻 11 号 p. 684
発行日: 1960年
公開日: 2009/02/12
ジャーナル フリーPDF形式でダウンロード (43K) -
今井 美材1960 年 2 巻 11 号 p. 685-697
発行日: 1960/11/30
公開日: 2009/02/12
ジャーナル フリーThe results in the öre processing and metal production tests carried out over one year at pilot plants of Tokai Refinery, Atomic Fuel Corporation, Tokaimura, Ibaraki Pref. are givén and the prospect to commercial plants, of 100t. ore/day and 100t. U/year each, is presented in terms of material balance diagrams with few reasonable assumptions based on test results.
On the ore processing, a prospect on domestic ore reserve and its grade as well is disclosed, the adaptability of domestic ore to milling is analysed, and then ore characteristics in processing is given summarizing from the test results on acid leaching, solid-liquid separation and solvent extraction-stripping. The mill cost is studied from the view point of economical feasibility to enterprising, illustrating the relation between allowable cost of ore as well as product price on one hand and mining cost on the other.
On the metal production, the superiority of the new refining process, “Excer” process, to the conventional one is demonstrated based on test results and the mechanism and operation of equipment such as Higgins column for ion exchange, ionic cell for electrolysis are reported in detail.
Reduction step from wet-processed UF4 to metal is reported so as to introduce for the first time the practice into plant scale operation. Low tap density inherent to wet-processed UF4 showed no unfavorable effect on the reduction at all. Studies on briquette reduction, amine extraction and scrap recovery are also briefed. They will in due course be useful to improve the operation very much.抄録全体を表示PDF形式でダウンロード (2814K) -
佐々木 茂行1960 年 2 巻 11 号 p. 698-704
発行日: 1960/11/30
公開日: 2009/02/12
ジャーナル フリーPDF形式でダウンロード (1558K) -
1960 年 2 巻 11 号 p. 705-707
発行日: 1960/11/30
公開日: 2009/02/12
ジャーナル フリーPDF形式でダウンロード (184K) -
1960 年 2 巻 11 号 p. 708-720
発行日: 1960/11/30
公開日: 2009/02/12
ジャーナル フリーPDF形式でダウンロード (2087K)
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