ROSATOM announced that on October 25, one of the most important construction milestones was completed at Kursk NPP-2 - welding of the pearlitic part of the reactor coolant pipeline. The welding and thermal treatment of all the welding joints was completed in 55 days instead of 88 envisaged by the schedule, which is an absolute record for this operation. Specialists of Energospetsmontazh JSC were involved in the works. The works were carried out 24 hours per day by 24 welders and 24 installation specialists who replaced each other performing welding and trimming of welding joints. Currently, coating with austenitic stainless steel is being performed which will protect the pipeline from the aggressive medium. These works will be completed before the end of October. The reactor coolant pipeline has the diameter of 850 mm, the wall thickness is 70 mm and its length is over 140 meters. The reactor coolant pipeline connects the main equipment of the primary circuit - the reactor, the steam generators and the reactor coolant pumps. Considering high requirements for quality and operational conditions, the reactor coolant pipeline welding is one of the most complicated and important stages of civil and construction works at the power unit. The reactor coolant pipeline carries the water heated in the reactor into the steam generators from which the steam goes to the turbine and generates electricity.