In the Design Bureau of Special Machine Building (LACA) in Saint Petersburg was established more reliable metallobetonny container for the environmentally safe storage of spent nuclear fuel, which consists of three steel cylinders placed one into the other. The space between the cylinders is filled frame made of strong super-heavy and high ductility of concrete.
The quality of the storage container are influenced by various factors disorders density and thickness of concrete, delamination and other possible surface defects which can lead to leakage of radiation.
Scientists from the St. Petersburg Institute of Nuclear Physics. Konstantinov proposed a method for defect inspection metallobetonnyh containers and used it to develop the installation. The work was published in the "Journal of Technical Physics."
Specialists affected by gamma radiation from radioactive cobalt-60 in the concrete walls of the container. Using a gamma detector was measured radiation penetrated through the wall and shot prepared. According to it, scientists have determined the structure of the walls of the container and found defects in the concrete layer.
Based on these findings, the researchers built a plant for finding surface defects metallobetonnogo container that can hold the entire measurement cycle and give full information about the condition of the container.
Installation software allows you to calculate the value of the power of the radiation dose of radiation after passing through a concrete wall to get information about the defective spots on the walls of the container to provide a general map-scan the entire surface.
Scientists hope that this attitude will help detect defects that occur in the production of containers for nuclear waste. It will be used extensively to reduce the likelihood of an uncontrolled radiation leak.
Source of information:
ND Shchigolev, VA Nightingale, MR Kolhidashvili, A. Pirogov, "Quality Control metallobetonnogo storage facility for spent nuclear fuel." Journal of Applied Physics, 2011, v. 81, no. 8.