Abstract
The paper is focused on specific features in operation of NPP pipeline devices (PD), principles of their control, recommendations on the use of passive devices, possibility to apply shape-memory (SM) devices manufactured using SM alloys. Flat-annular fixing sealing elements for protection of welded joints and easy installation of seats are discussed. Flow stop devices (FSD) with a direct impact of coolant on the working members are considered. FSDs with a break of electrical control circuit are discussed.
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