G - Physics – 21 – C
Patent
G - Physics
21
C
359/28
G21C 7/16 (2006.01)
Patent
CA 1249079
A b s t r a c t The reactor has a pressure vessel receiving a coolant and a reactor core. The core has vertically movable control rods (6) to which absorber rods (7) are secured. Each tubular control rod (6) extends, with the interposition of an annular gap (100), around an immobile guide rod (60) which is also tubular and which is longer than the control rod. To move the control rods (6) conveying means are provided which supply coolant from the pressure vessel under pressure to the interior of the guide rods. Each annular chamber (100) communicates by way of communi- cating bores (63, 65) with the interior of the associated guide rod (60) and, by way of at least two annular restrictions (17, 18) providing different, restrictors, with the pressure vessel interior. One restrictor (17) is disposed at the top end of the associated control rod (6) and the other restrictor (18) at the bottom end thereof. The control rods move axially upwards in response to an increasing quantity of coolant in the guide rod interiors and downwards in response to a decreasing quantity of coolant in the guide rod interiors. (Fig. 2)
488568
Gowling Lafleur Henderson Llp
Sulzer Brothers Limited
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