[1L01-07] Dismantling Technology

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)

[1L03] Research and development of lead block cutting technique for decommissioning nuclear power plants Ⅴ

*Tomohisa Goto^1,3, Glenn Harvel², Takeyoshi Sunagawa¹ (1. FUT, 2. Ontario Tech Univ., 3. Taihei Dengyo Ltd.)

Keywords:

Decommissioning,Shields,Lead,Low melting point alloy,Waste

In the decommissioning work of the nuclear plant, a large amount of lead plate used as a shielding material for radiation is generated as waste. The work of disposing of the lead plate is very difficult because it is difficult to cut using a general tool.In this research, we devised a technique that combines mechanical cutting technique and low melting point alloy.In order to efficiently cut lead plates using this method, we attempted to use a commercially available solder paste for the Bi-Sn alloy supplied to the lead plates, and the cutting efficiency was improved.However, commercially available solder pastes have several issues, such as producing white smoke when heated, which can cause a sore throat even when wearing a gas mask.Therefore, we have developed a Bi-Sn alloy paste that is specialized for cutting lead to solve these problems.