关键词: 层流等离子体, 退役, 切割弧, 切割解体

Abstract: A non-transfer-arc plasma cutting and dismantling device was developed for the remote cutting and dismantling operation on the large components during the decommissioning of nuclear facilities. This cutting device adopts laminar flow plasma technology, of which the effective cutting arc length can be more than 200mm and the cutting thickness towards steel can reach 150mm through the modification of the plasma generator, the power supply and the control system. This cutting technique successfully lengthens the cutting arc, reduces the amount of the blind spots, enhances the stability of the cutting arc, and enlarges the cutting thickness, all of which usually occur in those traditional plasma cutting devices. The application of this technology is expected to change the existing cutting and dismantling mode applied in the process of nuclear facility decommissioning.

Key words: Laminar flow plasma, Decommissioning, Cutting arc, Cutting and dismantling