[en] Higher than usual requirements for all parameters: hermetic nature in shield jacket, fire and thermal resistance, radiation protection, reliability of electric signal transfer and many others are made on the sealed inlets involved in the accident prevention system. The constructions of the sealed cable inlets made using different dielectric materials are treated. The schemes of the sealed cable inlets based on the cables with polymeric insulation, sealed cable inlets base on glass and ceramics are demonstrated. The advantages of the sealed cable inlets of the SICC system (sealed inlet of control cables) are noted