Characterization of natural radioactivity in the BSUIN and EUL underground laboratories based on the developed standard scheme

One of the most critical parameters describing underground laboratories is their natural radioactivity. Natural radioactivity depends on several factors, such as the depth at which the UL is located, local geology, and the materials used to reinforce the underground spaces. For this purpose, a standard scheme has been prepared, utilizing which one can quickly characterize and compare underground locations regarding their natural radiation. This article presents a scheme for Callio Lab, which includes in-situ measurements and laboratory analysis of rock and water samples.