Heat reactor system comprising a residual heat removal system and its use in boiling-water and pressurized-water reactors.

摘要

In heating reactors which, in particular, operate in accordance with the principle of internal natural circulation, a residual heat removal system (10, 11, 12) is connected to the intermediate coolant loop (ZK) via at least one mass flow adjusting member which, in residual heat removal operation, maintains a minimum mass flow through the residual heat removal cooler (10). The intermediate coolant loop (ZK) connects a first reactor-internal heat exchanger (4) to a second heat exchanger (6) via a hot-side and a cold-side leg (9.1, 9.2); the cold-side leg (9.2) contains a pump (5). According to the invention, a controllable element of power fluidics is used as mass flow adjusting member, a so-called vortex chamber valve (WV), having three hydraulic connections (s0, c0, e0) for supply, control and outlet flow (s1, c1, e1), the feed line (11) of the residual heat removal circuit being connected via an internal controllable current path (s0-e0) of the vortex chamber valve (WV) to the hot-side leg (9.1) of the intermediate coolant loop (ZK) and the hydraulic connection (c0) for the control current (c1) being connected to the cold-side leg (9.2) on the pressure side of the pump (5) of the intermediate coolant loop (ZK). The invention also relates to a use of the residual heat removal system with vortex chamber valve in boiling-water-type or pressurised-water-type nuclear reactors which are used for generating driving steam for steam turbo generators.