From June till September this year personnel of the radiation safety shop (hereinafter referred to as the RSS) have been involved in the measurements of gamma radiation exposure in the near zone of the New Safe Confinement (hereinafter referred to as the NSC).
The objective of the measurements was to analyze how much the level of gamma radiation has been reduced in the work area after sliding the NSC over the Shelter Object.
To accomplish this task, employees of the RSS performed measurements in three vertical plane surfaces; each of them had 9 control points at the height of 30, 60 and 90 meters above the ground. The plane surfaces are located at the distance of 120, 256 and 355 meters from the Shelter Object, covering the whole work area.
The measurements were performed with the use of electronic dose meter DMC 2000S manufactured by MGPI mounted on the drone.
Gamma radiation levels in the control points were determined after processing the readings of dose meters with the use of the DOSIMASS program.
Similar measurements have already been performed in the past - in 2003-2004 - by personnel of the Institute for Safety Problems of Nuclear Power Plants at the stage of development of design documentation for the NSC construction. The efficiency of the NSC arch radiation protection has been measured in comparison with these data.
Top Management meeting regarding ISF-2 Project was held at Chornobyl NPP industrial site on October 5. The meeting was attended by EBRD's Nuclear Safety Department representatives Mr Vince Novak, Mr Steven White, Mr Alexander Slavis and Mr Valery Kulishenko. Chornobyl NPP was represented at the meeting by Plant’s General Director Mr Igor Gramotkin, Safety Improvement Chief Engineer Mr Andriy Savin, Deputy Technical Director Mr Volodymyr Peskov, and by representatives of the Holtec Company Management, being the Project General Contractor.
