Sweden – Nuclear Power Plant Ringhals

task and problem definition

Contamination inside the pressurizer

• Avoiding risk of contamination

• Cold cutting process

• Mechanical cutting process

• Wall thickness 120 mm

solution

First cut – 100 mm

20 mm wall thickness remains. As the pressurizer remains tight, there is no risk of contamination. As it is not yet completely cut through, the work can be carried out under normal conditions.

Second cut – 20 mm

During the second cut, the machine is controlled via cameras. Due to our cutting concept and the negative pressure within the pressurizer, there was no contamination outside the pressurizer.