The Project Group consisting of the Ukrainian Consortium “KSK” (PJSC “KIEP”, SE “NIISK”, Institute for NPP Safety) and V.Shymanovskiy Institute “ProjectSteelConstruction”, which was involved by the SSE ChNPP into determination of probable causes of the partial collapse of the Turbine Hall’s roof in axes 50-52/А-Б and wall panels of Unit 4 Turbine Hall, and into development of engineering solutions on reconstruction of the collapsed roof and wall panels of the Turbine Hall, completed the work on March 07, 2013.

According to the results of consideration of the submitted report, an option that envisages construction of a dimensional roofing module was selected for implementation. This module will be assembled at the site in the proximity of Unit 4 Turbine Hall and then installed on crane-runway beams along rows “A” and “Б” by a crane (during the operation the Turbine Hall’s crane runways were used for 125t capacity bridge crane traveling).

Preparatory works for engineering-geodetic surveys, which are additional to the routine one, of the building structures of Unit 4 Turbine Hall have been commenced in accordance with the approved “Plan of Measures on Mitigation of the Consequences of 4^th Unit Roof Collapse…”.