Experience with the dismantling of three secondary steam generators in unit A in Gundremmingen by the ‘ice-sawing’ technique

Issues for Nuclear Power Plants Steam Generators

“…A wide range of dismantling techniques, both mechanical and thermal, are developed and tested during decommissioning of plants (IAEA 1999;Cumo et al, 2002;Eickelpasch et al, 1997;Klein et al, 2001;Steiner et al, 1997), often supported by European Community research programmes. There is a large variety of dismantling techniques that are state of the art and in use.…”

Calculation of External Exposure During Dismantling and Segmentation of Steam Generator

“…There are 2 ways how to dismantle such components: to be cut to smaller pieces or to be handled as compact structures. Practical applications of these approaches can be summarized as follows [3,15]:  Cut and disposein situ treatment, examples of realized projects: NPP Gundremmingen, Germany (SGs were filled with water, frozen and cut in situ with a band saw) [25], NPP Stade, Germany (cutting of the RPV in spent fuel basin using thermal and mechanical dismantling techniques) [16,17].  Pack and gotransport to an external treatment facility, examples of realized projects: transport of 4 SGs of NPP Stade to Studsvik Radwaste in Sweden, where decontamination, segmentation (using thermal and mechanical cutting tools) and melting were carried out [4,8,30], transport of the RPV from the NPP Rheinsberg to the Interim Storage North in the Greifswald site [31].…”

Pseudo-elastic wire application in robotized cutting systems

“…Nuclear and radioactive decommissioning is a niche service market expected to grow in the next years for the continuous dismantling of plants and equipment. Various cutting and splitting technologies derived from off-shore decommissioning can be used in nuclear and radioactive decommissioning such as burning, shearing, abrasive fluid cutting, abrasive chain cutting and abrasive wire cutting with advantages and disadvantages [1][2][3].…”