The nuclear engineers have also settled the problem of liquid radioactive waste treatment. The prime minister was shown a palm-size “tortoise” that turned out to be waste residues after processing. The sensor showed that the “tortoise” emits radiation less than the granite embankment of the Neva River in St. Petersburg. The system of on-line monitoring of the radiation background that is applied by Rosatom also aroused the interest of the RF prime minister. He checked with an iPad the background radiation around the Leningrad NPP, which, according to Kiriyenko, “is ten times lower than on the popular Brazilian beaches.”