Technological hatch of the sixth reactor compartment of the Kursk nuclear submarine will be opened on Friday, Vladimir Kuroyedov, the Russian Navy Commander-in-Chief, was quoted as saying. According to him, technological cuts in the compartment showed there was no water inside. Air samples testified that the radiation background in the compartment was within the norm, six microroentgen per hour. Water in the bio-hazard tank located under the compartment, has been pumped out. The tank is currently filled with steam, which is used to heat the sub's compartments. When the reactor room is sufficiently heated, its technological hatch will be opened to let in the experts who will de-activate the reactor.