Safety evaluation of asphalt products. I. Radiation decomposition of asphalt products.:Radiation Decomposition of Asphalt Products

スポンサーリンク

概要

• 論文の詳細を見る

• The safety of activity-containing asphalt products kept in enclosed storage was evaluated from considerations of radiolysis and hydrogen evolution. The samples exam-ined were mainly homogeneous asphalt products containing 43w/o of sludge produced in routine operation of the asphalt plant at the Japan Atomic Energy Research Institute (JAERI), the samples were irradiated with external <SUP>60</SUP>Co γ-ray source to a dose of 10<SUP>9</SUP>R.<BR>The bulk of the gases evolving from the asphalt product is hydrogen, which consti-tutes 7595% of the total gas evolution. The total amount of gases generated during infinite time is proportional to the total exposure dose ; hydrogen evolves at a rate of 5.5×10<SUP>-3</SUP> cm<SUP>3</SUP>/g•MR. The amount of total gas evolution is governed solely by the quantity of asphalt, and is independent of the sludge contained therein. Nor do differences in the rate of dose appear to have any significant effect. In so far as concerns smallness of radiolysis, slightly better performance can be expected from straight than from blown asphalt.<BR>There is no danger of explosion of the asphalt products currently generated at JAERI (10<SUP>-5</SUP> Ci/kg), which can be expected to accumulate in infinite time no more than about 3 cm<SUP>3</SUP> from a 200l product. Only asphalt products containing activity in concentrations exceeding 10<SUP>-1</SUP> Ci/kg risk explosion when kept in enclosed storage, through accumulation of hydrogen in quantity exceeding the explosion limit in a relatively short time.

• 一般社団法人 日本原子力学会の論文

著者

• MATSUZURU Hideo

  Tokai Research Establishment, Japan Atomic Energy Research Institute

• MORIYAMA Noboru

  Tokai Research Establishment, Japan Atomic Energy Research Institute

• DOJIRI Shigeru

  Tokai Research Establishment, Japan Atomic Energy Research Institute

関連論文

• Safety evaluation of asphalt products. I. Radiation decomposition of asphalt products.:Radiation Decomposition of Asphalt Products
• Influence of Differences in Resin-Matrix Structure on Ion-Exchange Adsorption of Trace Amounts of Ag(I), Co(II) and Cr(III)
• Incorporation of Radioactive Spent Ion Exchange Resins in Plastics

スポンサーリンク