Fuel assembly and its pipe seat and anti-foreign body assembly applied to the pipe seat
A technology for fuel assembly and foreign body prevention, which is applied in the directions of reactor fuel elements, fuel element assembly, reactors, etc., can solve the problems of poor pressure drop performance, poor foreign body resistance performance, and large thickness of ribs, and achieves enhanced foreign body prevention performance. , Good filtering effect, small resistance along the way
Active Publication Date: 2018-06-19
CHINA NUCLEAR POWER TECH RES INST CO LTD +2
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Problems solved by technology
The thickness of the ribs in this design is relatively large, and the pressure drop performance is poor
At the same time, the water hole adopts a square design, and the anti-foreign matter performance is poor
Method used
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[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0034] Such as figure 1 As shown, the fuel assembly in a preferred embodiment of the present invention includes a frame and fuel rods 1, and the fuel rods 1 are arranged in parallel and evenly spaced in the rigid frame. The rigid framework includes a mixing grid 2 , a spacer grid 3 , an upper tube base 4 , a lower tube base 5 and a guide tube 6 . The mixing grid 2 and the positioning grid 3 are respectively composed of regularly arranged cells for accommodating and clamping the fuel rods 1 . The positioning grid 3 and the mixing grid 2 are arranged at intervals in the axial direction of the fuel rod 1 for the fuel rod 1 to pass through and position. Guide tube 6 is longer than fuel rod 1, and it stretches out from the...
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The invention relates to a fuel assembly, a tube socket of the fuel assembly and a foreign matter prevention assembly applied to the tube socket. The tube socket comprises a pore plate, wherein a circulation hole through which a coolant circulates is formed in the pore plate; the foreign matter prevention assembly comprises a foreign matter prevention plate; a plurality of foreign matter prevention holes penetrating through one another are formed in the foreign matter prevention plate; the foreign matter prevention holes are of non-square structures and correspond to the position of the circulation hole. According to the foreign matter prevention assembly disclosed by the invention, the foreign matter prevention plate is of the non-square structure, the widths in different directions are different, the foreign matter prevention holes can be of irregular shapes on premise of guaranteeing the same circulation area, the outline dimension of the foreign matter prevention holes through which foreign matters can pass is reduced, an excellent filtering effect can be achieved, and the foreign matter prevention performance of the tube socket is enhanced; moreover, a fewer ribs can pass through the unit area in case of a certain foreign matter prevention effectiveness, the pressure drop on-way resistance can be reduced, and the pressure drop is reduced.
Description
technical field [0001] The invention relates to the field of nuclear power, and more specifically relates to a fuel assembly, its socket, and a foreign body preventing assembly applied to the socket. Background technique [0002] In the current design process of the lower nozzle base of the fuel assembly, the lower nozzle base includes a connecting plate and an anti-foreign matter plate. The anti-foreign matter plate of the lower pipe seat adopts the arrangement of criss-crossed straight ribs, and its water holes are formed by EDM on the plate. The thickness of the ribs in this design is relatively large, and the pressure drop performance is poor. At the same time, the water hole adopts a square design, and the anti-foreign matter performance is poor. In order to further reduce the pressure drop and improve the anti-foreign matter ability, a new anti-foreign matter plate and the corresponding lower pipe seat are proposed. Contents of the invention [0003] The technical...
Claims
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IPC IPC(8): G21C3/33G21C3/332
CPCG21C3/33G21C3/332Y02E30/30
Inventor 陈威薛喆禹文池周跃民李伟才
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD