On July 2, 2013, the testing of installation for dust suppressing inside Unit 4 Turbine Hall were commenced at Chernobyl NPP. A necessity in creating such system is preconditioned by conclusions of the commissions, which investigated reasons of partial destruction of building structures of the Unit 4 Turbine Hall.
As Deputy Head of the Shelter (NSC) Operation Shop Aleksandr Khimach reported, the installation is intended for supplying and spraying water solution. In total, 6 installations will be mounted within Turbine Hall enabling dust suppression over its whole area.
“Complexity of the task set to our staff lies in that technical requirements imposed to the installation, i.e. provision of water jet power, finely dispersive spraying and at the same time easy maintenance stipulated by radiation situation within Unit 4 Turbine Hall, were difficult to implement. Also this task was difficult to solve due to narrow and inconvenient technological passages available in this premise”, A. Khimach said.
It is a reminder that on February 12, 2013, at 14:03, the wall panels and a part of light roof of Unit 4 Turbine Hall partially collapsed. The destruction area was about 600 m2.
During February 13-20, two commissions investigated at ChNPP the reasons of partial destruction of the Turbine Hall building structures. The tasks set to the commissions were to analyze situation led to building structure breakdown, provide proposals on consequence elimination, as well as to develop and agree with SNRIU the corrective measures on management of additional drain waters and contaminated dust which can arise for a period required for recovering damaged roof and side walls of Unit 4 Turbine Hall.
