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Main lock

Main lock is used at nuclear power plants. It is installed in the building of reactor unit and represents an element of leak-tight enclosure. It is designed for personnel’s passage and transfer of equipment and tools with total weight of not more than 3 tons inside the leak-tight area of reactor unit while maintaining its leak-tightness (locking). The lock is equipped with two doors to be opened sequentially using electromechanical drive. The lock control system allows control of locking from any area (leak-tight area, non-tight area, inside the lock body). If power supply is missing, doors may be opened by means of manual drive from any area. The lock provides automatic control of leakage in case of each door opening. The main lock produced by JSC TYAZHMASH is designed for use in reactor units with VVER-1000 type reactors.