System and method for accelerated feeding of a reactivity influencing medium in a heavy water moderated reactor

摘要

System for accelerated feeding of a reactivity influencing medium, in particular a neutron absorbing medium, in a heavy water moderated pressurized water reactor (5) with at least one Vorhaltetank (3) for providing the neutron absorbing medium and at least one feed line (7) for medium-conducting and fluidic connection of reactor (5 ) and / or moderator tank and Vorhaltetank (3), wherein between Vorhaltetank (3) and reactor (5) and / or moderator tank an explosion-triggered or explosion-driven valve (6, 10), a so-called. Squib valve, arranged in the feed line (7) is, with which a fast and efficient triggering of the feed of the neutron absorbing medium, in particular the rapid Boreinspeisung, in the reactor (5) and / or moderator tank is effected, wherein the Vorhaltetank (3) in the reactor operation is constantly below the full feed pressure or constantly with the full feed pressure beauf is struck so that this pressure in the case of request and after opening the Squib Valves (6, 10) immediately to feed the respective medium without delay is immediately available and usable, the Squib Valve (6, 10) in less than five milliseconds, preferably within three milliseconds, and releases its passage (18), and due to the immediately available high feed pressure, an optimally fast distribution of the feedstock or the cloud of the reactivity influencing and / or neutron absorbing medium in the moderator tank or reactor (5) and thus a fast and optimal mixing of the feed with the moderator in the reactor vessel effected and made possible and wherein the shear cap (16) of the Squib valve (6, 10) in normal operation of the reactor (5) stuck, in particular not detachable, with the respective pipe or feed line ( 7) is connected or formed integrally with the pipe and / or feed line (7) and / or a leak-tight separation between the neutron-absorbing medium, in particular the borated water, and the reactor (5) and / or moderator tank is effected and ensured and between the squib valve and reactor a rupture disc is provided and the line between the rupture disk and Squib Valve with the respective medium is filled.