Radiation damage of fluorocarbon by krypton-85 beta-rays,(I). Radiolysis of trichlorofluoromethane by cobalt-60 gamma-rays.:Radiolysis of Trichlorofluoromethane by Cobalt-60 Gamma-Rays

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概要

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• Irradiation experiments using <SUP>60</SUP>Co γ-rays were undertaken on CCl<SUB>3</SUB>F to examine the radiation damage of fluorocarbon, used as solvent in the recovery of <SUP>85</SUP>Kr from the off-gas of fuel reprocessing plants operating on the solvent absorption. The conditions of irradiation were varied in the range of 2.3×10<SUP>4</SUP>1.1×10<SUP>6</SUP> rad/h in terms of dose rate and -3016°C in temperature, to assemble information on the kinds of degradation products generated, the relationship between decomposition rate and absorbed dose, and the effects on the decomposition exerted by certain factors (dose rate, temperature, impurities, wall materials). The results obtained included the following findings : (1) The degradation products of CCl<SUB>3</SUB>F comprised halogen ions and thirteen kinds of fluorocarbons. (2) The rate of decomposition of CCl<SUB>3</SUB>F and the yield of the individual degradation products were roughly proportional to the absorbed dose ; the energy decomposition of CCl<SUB>3</SUB>F at -30°C was 0.013 mol/o /Mrad (<I>G</I>=1.4) under a dose rate of 1.1×10<SUP>6</SUP> rad/h. (3) The decomposition rate of CCl<SUB>3</SUB>F was inhibited by increasing dose rate, and promoted by rising irradiation temperature. (4) The yields of halogen ions and C<SUB>2</SUB>Cl<SUB>4</SUB>F<SUB>2</SUB>, and the decomposition rate of CCl<SUB>3</SUB>F increased with the addition of air. (5) No appreciable influence on the decomposition of CCl<SUB>3</SUB>F was observed to be exercised by the presence of such materials as stainless steel, Cu and Al.

• 一般社団法人 日本原子力学会の論文

著者

• OOTSUKA Norikatsu

  Takasaki Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute

• YAMAMOTO Tadatoshi

  Takasaki Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute

関連論文

• Dosimetry in krypton-85 gas irradiation vessel.
• Radiation damage of fluorocarbon by krypton-85 beta-rays,(I). Radiolysis of trichlorofluoromethane by cobalt-60 gamma-rays.:Radiolysis of Trichlorofluoromethane by Cobalt-60 Gamma-Rays
• Irradiation characteristics of krypton-85 irradiation facility using pressurization-dissolution method.
• Storage of krypton-85 by adsorption method.
• Radiation damage of fluorocarbon by krypton-85 beta-rays, (IV). Irradiation experiments using krypton-85 beta-rays on trichlorofluoromethane in batch and flow system.:Irradiation Experiments using Krypton-85 Beta-Rays on Trichlorofluoromethane in Batch an
• Radiation damage of fluorocarbon by krypton-85 beta-rays, (II). Radiolysis of some fluorocarbons by cobalt-60 gamma-rays.:Radiolysis of Some Fluorocarbons by Cobalt-60 Gamma-Rays

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