Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Tsuyoshi Imakita

Kiyoshi Asahina

Ryusuke Kitamura

Tsutomu Nishimura

Keiichi Ishiyama

Shigeo Tachibana

Yasushi Sugimura

Yoshitaka Kurimoto

Provided is a method of cleaning the inside of a pressure vessel for blasting to enable a short-time treatment regardless of the state of residual substances. This method includes: a step of setting an explosive for cleaning, different from an explosive for blasting, in an amount necessary for decomposing a residue of the object inside of a pressure vessel after a blasting step of setting and blasting the object and the explosive for blasting in the pressure vessel; and a step of decomposing the residue by exploding the explosive for cleaning in the pressure vessel.

Method of cleaning inside of pressure vessel for blasting

A treated waste has been treated so as to prevent diffusion of a substance to be disposed, of e.g., radionuclide &ldquo;I&rdquo;, that tends to occur when the waste is disposed of in reducing environment at an ultra-deep underground. The treated waste has a low-resolution compound containing &ldquo;I&rdquo;, e.g., &ldquo;AgI&rdquo;, and a high oxygen potential agent having a higher oxygen potential than the compound, e.g., &ldquo;Fe,O,&rdquo;. Ionization of the substance to be disposed, attributable to reduction of the compound, can be suppressed over a long time.

Treated waste, method for making the same and apparatus for making the same

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Kobe, Japan

Tsuyoshi Imakita