Raw Materials for Low-Activation Concrete Neutron Shields

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概要

• 論文の詳細を見る

• Concrete surrounding a nuclear reactor accumulates radioisotopes induced by neutron reactions during operation, and this concrete still remains to an enormous degree as radioactive waste after decommissioning. The disposal of such activated concrete is very costly and requires strict supervision. Hence, there has been a strong desire to develop a concrete that retains little residual radioactivity, that is, “low-activation” concrete. In the present study, we have identified several raw materials for such concrete—low-activation limestone, quartzite, colemanite, alumina-ceramics, white Portland cement and high-alumina cement—by performing a screening test for neutron irradiation. The results show that low-activation concrete compounded from such low-activation raw materials should serve for neutron shielding. Another noteworthy finding is that limestone occurring near schalstein deposits, and especially when sandwiched between two beds of schalstein, is an excellent low-activation raw material.

• 社団法人 日本原子力学会の論文
• 2002-12-25

著者

• Nakamura Takashi

  Department of Cardiology, Saiseikai Shigaken Hospital

• KIMURA Ken-ichi

  Department of Biological Chemistry and Food Science, Iwate University

• Nakamura T

  Japan Atomic Energy Res. Inst. (jaeri) Ibaraki

• KINNO Masaharu

  Civil Engineering Division, Fujita Corporation

• KIMURA Ken-ichi

  Technical Research Laboratory, Fujita Corporation

• Kinno Masaharu

  Civil Engineering Division Fujita Corporation

• Kimura K

  Department Of Biological Chemistry And Food Science Iwate University

• Nakamura Takashi

  Department Of Cardiology Saiseikai Shiga Hospital

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