CN103106930B - Supercritical-Pressure Light Water Cooled Reactor fuel assembly - Google Patents
Supercritical-Pressure Light Water Cooled Reactor fuel assembly Download PDFInfo
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- CN103106930B CN103106930B CN201310042954.4A CN201310042954A CN103106930B CN 103106930 B CN103106930 B CN 103106930B CN 201310042954 A CN201310042954 A CN 201310042954A CN 103106930 B CN103106930 B CN 103106930B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure, comprise distribution drum, distribution drum upper surface offers main tap hole and multiple secondary tap hole, secondary tap hole is uniformly distributed in around main tap hole.This adjustment structure structure is simple, is applicable to Supercritical-Pressure Light Water Cooled Reactor fuel assembly.The invention also discloses a kind of Supercritical-Pressure Light Water Cooled Reactor fuel assembly, comprise fuel rod box and above-mentioned Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure, fuel rod box comprises the high temperature box and low temperature box that are interconnected, in high temperature box, the cross-sectional area of coolant flow passages is greater than the cross-sectional area of coolant flow passages in low temperature box, high temperature box is made up of stainless steel or nickel-base alloy, and low temperature box is made up of zircaloy.The invention has the advantages that, relative to existing fuel assembly, substantially increase the neutron economy of reactor, and the accurate distribution of cooling medium and moderator can be realized.
Description
Technical field
The present invention relates to reactor core internals, be specifically related to Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure and fuel assembly.
Background technology
For a long time, the neutron economy of reactor is nuclear energy industry issues that need special attention always.Improve the leakage being at all minimizing neutron of pile neutron economy and unhelpful absorption.Concerning fuel assembly, its structured material and cladding materials need the alloy as far as possible selecting neutron-absorbing less.
In Supercritical-Pressure Light Water Cooled Reactor, fuel assembly is single layer structure, the cooling water flow conduits self-consistentency of its inside, and chilled water enters from the entrance of fuel assembly, after fuel rod heating, then is discharged by the outlet of fuel assembly.Under this configuration, fuel rod can be consistent by being heated into before and after the temperature of chilled water.
Because Supercritical-Pressure Light Water Cooled Reactor operating pressure and temperature are all very high, fuel assembly structure material can not adopt and absorb the less zircaloy of neutron, and often selects stainless steel or nickel-base alloy isotonic to absorb more exotic material.Such as: the supercritical fuel modular construction material of European Union's exploitation is stainless steel, and cladding materials is nickel-base alloy; Supercritical fuel assembly involucrum and the structured material of Japan's exploitation all use nickel-base alloy.Fuel assembly structure is more complicated, the stainless steel used or nickel-base alloy more, the unhelpful absorption of neutron is more, and the neutron economy of reactor is poorer.
In the art, the high fuel assembly of a kind of neutron economy is badly in need of.Inventor is through research, design a kind of fuel assembly adopting hierarchy, the flow of controlled cooling model water diverse location in fuel assembly is carried out by the size of controlled cooling model water flow passage cross-sectional area, make the temperature of chilled water diverse location in fuel assembly different, thus enable fuel assembly adopt in low-temperature space the material that neutron-absorbing amount is few.
Applicant also finds, current common pressurized water type reactor and Supercritical-Pressure Light Water Cooled Reactor all do not arrange special flow adjusting structure, and the accurate flow that cannot realize cooling medium and moderator distributes, and cannot change the flow of cooling medium and moderator.And the flow of controlled cooling model agent and moderator can enable the fuel assembly of above-mentioned employing hierarchy more effectively realize the object of controlled cooling model coolant-temperature gage.
First flow adjusting structure is applied in boiling-water reactor.It is very high that boiling-water reactor core flow distributes requirement, is therefore provided with removable throttling element at reactor core lower plate discharge orifice place, to facilitate the coolant flow regulating and enter every group fuel assembly.Boiling-water reactor throttling element structure is very complicated, and due to BWR fuel assembly and Supercritical-Pressure Light Water Cooled Reactor fuel assembly structure form difference, its throttling element is not also suitable for Supercritical-Pressure Light Water Cooled Reactor fuel assembly.The Core cooling agent of Supercritical-Pressure Light Water Cooled Reactor double-flow structures shape distributes and is more complex than common power station PWR and boiling-water reactor far away, therefore, design a kind of structure more simple, and the flow adjusting structure being applicable to Supercritical-Pressure Light Water Cooled Reactor two-flow core structure is very important.
Summary of the invention
Namely first object of the present invention be to provide a kind of Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure, and this flow adjusting structure is applicable to Supercritical-Pressure Light Water Cooled Reactor double-flow structure, and structure is simple.
First object of the present invention is achieved through the following technical solutions:
Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure, comprises distribution drum, and distribution drum upper surface offers main tap hole and multiple secondary tap hole, secondary tap hole is uniformly distributed in around main tap hole.Chilled water flows through fuel assembly by main tap hole, and moderator flows out fuel assembly by secondary tap hole, realizes the distribution of chilled water and moderator.Wherein, the quantity of secondary tap hole can the quantity free setting of moderator pipe in based on fuel assembly.The aperture of main tap hole and secondary tap hole can the duty of based on fuel assembly set, and power is higher, and aperture is larger, and flow is larger, otherwise less.By changing the present invention of different pore size, realize adjustment and the distribution of chilled water and moderator flow, widely applicable, adaptivity is strong.Positioning accuracy request of the present invention is not high, and allows to there is certain interval between reactor core lower plate discharge orifice, is conducive to installation and the replacing of flow adjusting structure.
As the first prioritization scheme of the present invention, main tap hole design is become up-thin-low-thick stepped hole, the step surface of described main tap hole is provided with locating slot.This locating slot is used for realizing remote-controlled operation.Insert this locating slot by stock, installation of the present invention, dismounting or adjustment can be carried out at a distance, make the present invention have more ease for use.Especially, when temperature is higher, avoid personnel closely to install, dismantle or regulate the present invention, security is high.
As the second prioritization scheme of the present invention, also comprise positioning key, the diameter of described distribution drum upper end is greater than the diameter of described distribution drum lower end, and positioning key is arranged on the periphery of described distribution drum lower end.The present invention is installed in reactor core lower plate discharge orifice, obtains a step surface by the change of distribution drum diameter, and step surface can facilitate the present invention to install, and improves positioning precision, and realizes axial compression of the present invention.Positioning key rotates for limiting circumference of the present invention.Positioning key adopts the little cold charge mode of deflection to install.
As the third prioritization scheme of the present invention, the periphery of described distribution drum lower end is provided with conical transition face.This conical transition face can make the present invention when not aiming at reactor core lower plate discharge orifice completely, also can install smoothly.
Namely second object of the present invention be to provide a kind of reactor fuel assemblies, flow adjusting structure is not had to overcome existing supercritical fuel assembly, rust steel or nickel-base alloy isotonic can only be used to absorb more exotic material, cause the defect of the neutron economy difference of reactor.
Second object of the present invention is achieved through the following technical solutions:
Supercritical-Pressure Light Water Cooled Reactor fuel assembly, comprise fuel rod box, the inner space of fuel rod box forms coolant flow passages, also comprise any one Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure above-mentioned, described fuel rod box comprises the high temperature box and low temperature box that are interconnected, in high temperature box, the cross-sectional area of coolant flow passages is greater than the cross-sectional area of coolant flow passages in low temperature box, and high temperature box is made up of stainless steel or nickel-base alloy, and low temperature box is made up of zircaloy;
Also comprise the high temperature base be made up of stainless steel or nickel-base alloy, high temperature moderator box and high temperature moderator pipe, also comprise the low temperature base be made up of zircaloy, low temperature moderator box and low temperature moderator pipe, high temperature moderator box is arranged in described high temperature box, low temperature moderator box is arranged in described low temperature box, high temperature base is communicated with described high temperature box, low temperature base is communicated with described low temperature box, high temperature moderator box is communicated with low temperature moderator box, high temperature moderator pipe runs through high temperature base, high temperature moderator pipe is connected with high temperature moderator box, low temperature moderator pipe runs through low temperature base, low temperature moderator pipe is connected with low temperature moderator box, high temperature base offers coolant outlet, low temperature base offers cooling water inlet,
The upper end of described distribution drum is near low temperature base, and described main tap hole is corresponding with cooling water inlet, and described secondary tap hole is corresponding with low temperature moderator pipe.
Inventor finds through research, chilled water can be heated to higher temperature (being generally more than 500 DEG C) in existing supercritical fuel assembly, this temperature is unaffordable for the material (as zircaloy) that neutron-absorbing amount is less, therefore, existing supercritical fuel assembly can only use rust steel or nickel-base alloy isotonic to absorb more exotic material, causes the neutron economy of reactor poor.In order to obtain the high fuel assembly of neutron economy, inventor wishes zircaloy to be farthest applied in supercritical fuel assembly, and problems faced is how to reduce coolant water temperature.Finally, the technical scheme of inventor's invention adopts hierarchical design, and fuel assembly is divided into two parts, carried out the flow velocity of controlled cooling model water by the cross-sectional area controlling cooling water flow conduits in two parts.In low temperature box, because the cross-sectional area of cooling water flow conduits is less, chilled water flow velocity is fast, and chilled water is with the shorter time by fuel rod, and the heat time of fuel rod to chilled water is short, makes the temperature of chilled water in low temperature box lower.Chilled water through heating enters high temperature box from low temperature box, because the cross-sectional area of cooling water flow conduits in high temperature box is comparatively large, chilled water flow velocity is slow, and the time that chilled water contacts with fuel rod is long, fuel rod can, fully to chilled water heating, make the temperature of chilled water reach predetermined temperature.Adopt said structure, when satisfied outlet cooling water temperature reaches predetermined value, make coolant water temperature in low temperature box lower than the coolant water temperature in high temperature box, thus can be less but the zircaloy of non-refractory manufactures low temperature box with neutron-absorbing, improve the neutron economy of reactor.
Inventor also add Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure, for distributing the coolant flow of every group fuel assembly, Supercritical-Pressure Light Water Cooled Reactor fuel assembly can be enable more effectively to realize the object of controlled cooling model coolant-temperature gage.
High temperature base and low temperature base are used for being connected with other device of reactor, and provide export and import for chilled water and moderator.Moderator box and moderator pipe are used for for moderator provides a complete circulation duct.Cooling medium is entered from the coolant inlet low temperature base by Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure, is then flowed out by low temperature box, high temperature box, high temperature base successively.Moderator enters from low temperature moderator pipe, is then flowed out by low temperature moderator box, high temperature moderator box, high temperature moderator pipe successively.Said structure can make moderator and cooling medium shunt, and makes moderator consistent with the flow of cooling medium, shortens flow process, makes slowing down even, improves reactor core security.In addition, in order to strengthen the neutron economy of reactor further, coordinate the different temperatures of chilled water in high temperature box and low temperature box, adopt stainless steel or nickel-base alloy to make high temperature base, high temperature moderator box and high temperature moderator pipe, adopt zircaloy to make cryotron seat, low temperature moderator box and low temperature moderator pipe.
As the first prioritization scheme of the present invention, also comprise fuel rod, fuel rod is arranged in described high temperature box and low temperature box respectively.In high temperature box and low temperature box, fuel rod is set respectively, low temperature box is separated with the chilled water in high temperature box and heats.The quantity of described high temperature box internal combustion charge bar is less than the quantity of described fuel rod in described low temperature box.Make the cross-sectional area of coolant flow passages in high temperature box be greater than the cross-sectional area of coolant flow passages in low temperature box, can accomplished in many ways be adopted, such as: when wall thickness is identical, the cross-sectional area of high temperature box is designed be greater than the cross-sectional area of low temperature box; When cross-sectional area is identical, the wall thickness of high temperature box is designed be less than the wall thickness of low temperature box.But, above-mentioned two kinds of modes all Shortcomings: in reactor, the installation of fuel assembly is comparatively tight, the cross-sectional area of high temperature box is designed be greater than low temperature box cross-sectional area must cause fuel assembly that difficulty is installed; The wall thickness of high temperature box is designed be less than the wall thickness of low temperature box, not only add material cost, also make the bad stability of fuel assembly.Above-mentioned two kinds of modes are combined and also there are the problems referred to above.It should be noted that, although above-mentioned two kinds of modes or both combinations exist certain not enough, can goal of the invention be realized, within protection scope of the present invention.
Finally, inventor carrys out the cross-sectional area of controlled cooling model agent runner by the mode controlling fuel rod quantity in high temperature box and low temperature box, when cross-sectional area and wall thickness are all identical, in low temperature box, the quantity of fuel rod is many, the space that fuel rod takies is large, in low temperature box, the cross-sectional area of coolant flow passages is naturally less, otherwise in high temperature box, the cross-sectional area of coolant flow passages is larger.Adopt the installation not affecting fuel assembly in this way, do not increase material cost, also do not affect the structural stability of fuel assembly.
As the second prioritization scheme of the present invention, also comprise the connecting box and connecting pipe that are made up of stainless steel or nickel-base alloy, described high temperature box is communicated with by connecting box with low temperature box, and connecting pipe is arranged in connecting box, and connecting pipe is communicated with described high temperature moderator box and low temperature moderator box.
Heat if the chilled water flowed out from low temperature box enters in high temperature box immediately, in high temperature box, the partial heat of chilled water can be directly conducted to the chilled water in low temperature box, and cooling water temperature in low temperature box is raised.In order to solve emerging problem, set up connecting box, connecting box provides spatial transition for the chilled water in the chilled water in low temperature box and high temperature box, prevent chilled water in high temperature box directly by heat conduction in the chilled water in low temperature box.Connecting pipe makes the moderator in connecting box and chilled water shunt.In connecting box, the temperature of chilled water can, higher than the temperature of chilled water in low temperature box, therefore, adopt stainless steel or nickel-base alloy to form connecting box and connecting pipe.
As the third prioritization scheme of the present invention, described coolant outlet is the steam window being arranged at high temperature base side.High temperature base is connected with reactor vapor chamber, and steam window is arranged in reactor vapor chamber, and steam window is heated to form the chilled water of steam for discharging, and steam is exported by reactor vapor chamber.
As the 4th kind of prioritization scheme of the present invention, also comprise the high temperature base web member be made up of stainless steel or nickel-base alloy, the low temperature base web member be made up of zircaloy, described high temperature base is communicated with described high temperature box by high temperature base web member, and described low temperature base is communicated with described low temperature box by low temperature base web member.
As the 5th kind of prioritization scheme of the present invention, also comprise the spreader plate be made up of stainless steel or nickel-base alloy, spreader plate is arranged in described high temperature base and high temperature base inside is divided into two chambers do not communicated, described two chambers respectively high temperature box described with two are communicated with, two described high temperature moderator pipes run through two chambers respectively, and high temperature moderator pipe connects with the high temperature moderator box in corresponding high temperature box.Described low temperature base is communicated with two described low temperature box, and two low temperature moderator pipes run through low temperature base, and two described low temperature moderator pipes respectively low temperature moderator box described with two are connected.
In order to make structure of the present invention compacter, connecting two high temperature boxes with a high temperature base simultaneously, in order to make the chilled water shunting gone out in two high temperature boxes, in high temperature base, setting up spreader plate, high temperature base inside is divided into two independently chambers.In order to the high temperature moderator box in corresponding two high temperature boxes, be naturally also provided with two high temperature moderator pipes.In order to the temperature enabling spreader plate bear high-temperature cooling water, stainless steel or nickel-base alloy is adopted to make spreader plate.Connect two low temperature box with a low temperature base simultaneously, in order to the low temperature moderator box in corresponding two low temperature box, be naturally also provided with two low temperature moderator pipes.
In sum, advantage of the present invention and beneficial effect are:
1. provide a kind of structure simple, easy for installation, be applicable to the flow adjusting structure of Supercritical-Pressure Light Water Cooled Reactor two-flow core structure, the coolant flow distributing every group fuel assembly can be used for, Supercritical-Pressure Light Water Cooled Reactor fuel assembly can be enable more effectively to realize the object of controlled cooling model coolant-temperature gage;
2. provide a kind of Supercritical-Pressure Light Water Cooled Reactor fuel assembly, adopt hierarchy, the different high temperature box of the cross-sectional area of coolant flow passages and low temperature box are set, make the coolant temperature in low temperature box lower, low temperature box and the parts that are attached thereto thereof can be adopted and absorb the less zircaloy of neutron, relative to existing fuel assembly, substantially increase the neutron economy of reactor;
3. cooling medium and moderator are shunted, and cooling medium flows to consistent with moderator, shortens flow process, make slowing down even, improve reactor core security;
4. be provided with connecting box, for the chilled water in the chilled water in low temperature box and high temperature box provides spatial transition, prevent chilled water in high temperature box directly by heat conduction in the chilled water in low temperature box, ensure effect of the present invention;
5. compact conformation.
Accompanying drawing explanation
In order to be illustrated more clearly in embodiments of the invention, be briefly described to the accompanying drawing used required for describing in the embodiment of the present invention below.Apparent, the accompanying drawing in the following describes is only some embodiments recorded in the present invention, to those skilled in the art, when not paying creative work, according to accompanying drawing below, can also obtain other accompanying drawing.
Fig. 1 is the cross-sectional view of Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure;
Fig. 2 is the vertical view of Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure;
Fig. 3 is the structural representation of Supercritical-Pressure Light Water Cooled Reactor fuel assembly;
Wherein, the parts title that Reference numeral is corresponding is as follows:
1-high temperature box, 2-low temperature box, 3-fuel rod, 41-high temperature base, 42-low temperature base, 51-high temperature moderator box, 52-low temperature moderator box, 61-high temperature moderator pipe, 62-low temperature moderator pipe, 7-connecting box, 8-connecting pipe, 9-steam window, 10-high temperature base web member, 11-low temperature base web member, 12-spreader plate, 131-high-temperature substrates, 132-low temperature substrates, 141-high temperature upper junction plate, 142-low temperature upper junction plate, 151-high temperature lower connecting plate, 152-low temperature lower connecting plate, 16-distribution drum, the main tap hole of 161-, the secondary tap hole of 162-, 163-locating slot, 164-conical transition face, 17-positioning key.
Embodiment
In order to make those skilled in the art understand the present invention better, below in conjunction with the accompanying drawing in the embodiment of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention.Apparent, embodiment described below is only the part in the embodiment of the present invention, instead of all.Based on the embodiment that the present invention records, other all embodiment that those skilled in the art obtain when not paying creative work, all in the scope of protection of the invention.
Embodiment 1:
As depicted in figs. 1 and 2, Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure, comprises distribution drum 16, and distribution drum 16 upper surface offers main tap hole 161 and multiple secondary tap hole 162, secondary tap hole 162 is uniformly distributed in around main tap hole 161.Chilled water enters fuel assembly by main tap hole 161, and moderator enters fuel assembly by secondary tap hole 162, realizes the distribution of chilled water and moderator.Wherein, the quantity of secondary tap hole 162 can the quantity free setting of moderator pipe in based on fuel assembly.The aperture of main tap hole 161 and secondary tap hole 162 can the duty of based on fuel assembly set.By changing the present invention of different pore size, realize adjustment and the distribution of chilled water and moderator flow, widely applicable, adaptivity is strong.
Embodiment 2:
As depicted in figs. 1 and 2, main tap hole 161 design, on the basis of embodiment 1, is become up-thin-low-thick stepped hole, the step surface of described main tap hole 161 is provided with locating slot 163 by the present embodiment.This locating slot 163 is for realizing remote-controlled operation.Insert this locating slot 163 by stock, installation of the present invention, dismounting or adjustment can be carried out at a distance, make the present invention have more ease for use.Especially, when temperature is higher, avoid personnel closely to install, dismantle or regulate the present invention, security is high.
Embodiment 3:
As depicted in figs. 1 and 2, the present embodiment, on the basis of embodiment 1, also comprises positioning key 17, and the diameter of described distribution drum 16 upper end is greater than the diameter of described distribution drum 16 lower end, and positioning key 17 is arranged on the periphery of described distribution drum lower end.The present invention is installed in reactor core lower plate discharge orifice, obtains a step surface by the conversion of distribution drum 16 diameter, and step surface can facilitate the present invention to install, and improves positioning precision, and realizes axial compression of the present invention.Positioning key rotates for limiting circumference of the present invention.
Embodiment 4:
As depicted in figs. 1 and 2, on the basis of the present embodiment any one in embodiment 1 ~ 3, the periphery of distribution drum 16 lower end is provided with conical transition face 164.This conical transition face 164 can make the present invention when not aiming at reactor core lower plate discharge orifice completely, also can install smoothly.
The technical scheme recorded in the various embodiments described above combines mutually, also can realize object of the present invention, in protection scope of the present invention.
Embodiment 5:
As shown in Figure 3, a kind of reactor layered fuel assembly, comprise fuel rod box, the inner space of fuel rod box forms coolant flow passages, described fuel rod box comprises the high temperature box 1 and low temperature box 2 that are interconnected, and in high temperature box 1, the cross-sectional area of coolant flow passages is greater than the cross-sectional area of coolant flow passages in low temperature box 2.
In low temperature box 2, because the cross-sectional area of cooling water flow conduits is less, chilled water flow velocity is fast, and chilled water is with the shorter time by fuel rod, and the heat time of fuel rod to chilled water is short, makes the temperature of chilled water in low temperature box 2 lower.Chilled water through heating enters high temperature box 1 from low temperature box 2, because the cross-sectional area of cooling water flow conduits in high temperature box 1 is comparatively large, chilled water flow velocity is slow, and the time that chilled water contacts with fuel rod is long, fuel rod can, fully to chilled water heating, make the temperature of chilled water reach predetermined temperature.
Because the temperature in low temperature box 2 is low, the zircaloy that low temperature box 2 adopts neutron-absorbing amount less is formed, to improve the neutron economy of reactor.Because the temperature in high temperature box 1 is high, high temperature box 1 adopts stainless steel or nickel-base alloy to form, to improve heat resistance.
Also comprise the high temperature base 41 be made up of stainless steel or nickel-base alloy, high temperature moderator box 51 and high temperature moderator pipe 61, also comprise the low temperature base 42 be made up of zircaloy, low temperature moderator box 52 and low temperature moderator pipe 62, high temperature moderator box 51 is arranged in described high temperature box 1, low temperature moderator box 52 is arranged in described low temperature box 2, high temperature base 41 is communicated with described high temperature box 1, low temperature base 42 is communicated with described low temperature box 2, high temperature moderator box 51 is communicated with low temperature moderator box 52, high temperature moderator pipe 61 runs through high temperature base 41, high temperature moderator pipe 61 is connected with high temperature moderator box 51, low temperature moderator pipe 62 runs through low temperature base 42, low temperature moderator pipe 62 is connected with low temperature moderator box 52, high temperature base 41 offers coolant outlet, low temperature base 42 offers cooling water inlet.
High temperature base 41 and low temperature base 42 for being connected with the stationary installation of reactor, and provide export and import for chilled water and moderator.Moderator box and moderator pipe are used for for moderator provides a complete circulation duct.Cooling medium enters from the coolant inlet low temperature base 42, is then flowed out by low temperature box 2, high temperature box 1, high temperature base 41 successively.Moderator enters from low temperature moderator pipe 62, is then flowed out by low temperature moderator box 52, high temperature moderator box 51, high temperature moderator pipe 61 successively.Said structure can make moderator and cooling medium shunt, and makes moderator consistent with the flow of cooling medium.In addition, in order to strengthen the neutron economy of reactor further, coordinate the different temperatures of chilled water in high temperature box 1 and low temperature box 2, adopt stainless steel or nickel-base alloy to make high temperature base 41, high temperature moderator box 51 and high temperature moderator pipe 61, adopt zircaloy to make cryotron seat 42, low temperature moderator box 52 and low temperature moderator pipe 62.
Also comprise the Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure that in embodiment 1 ~ 4, any one is recorded, the top of its distribution drum 16 is near low temperature base 42, and main tap hole 161 is corresponding with cooling water inlet, and described secondary tap hole 162 is corresponding with low temperature moderator pipe 62.Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure, for distributing the coolant flow of every group fuel assembly, can enable Supercritical-Pressure Light Water Cooled Reactor fuel assembly more effectively realize the object of controlled cooling model coolant-temperature gage.
Embodiment 6:
As shown in Figure 3, the present embodiment, on the basis of embodiment 5, makes restriction to the layout of fuel rod 3, and fuel rod 3 is arranged in described high temperature box 1 and low temperature box 2 respectively, to separate heat low temperature box 2 with the chilled water in high temperature box 1.Meanwhile, the quantity of fuel rod 3 is limited.When high temperature box 1 is identical with wall thickness with the cross-sectional area of low temperature box 2, the quantity of high temperature box 1 internal combustion charge bar 3 is less than the quantity of described fuel rod 3 in described low temperature box 2.In low temperature box 2, the quantity of fuel rod 3 is more, and it is comparatively large that fuel rod 3 occupies space in low temperature box 2, makes the cross-sectional area of the coolant flow passages in low temperature box 2 be less than the cross-sectional area of coolant flow passages in high temperature box 1.
It should be noted that, the cross-sectional area of coolant flow passages in high temperature box 1 is made to be greater than the cross-sectional area of coolant flow passages in low temperature box 2, can accomplished in many ways be adopted, such as: when wall thickness is identical, the cross-sectional area of high temperature box 1 be designed be greater than the cross-sectional area of low temperature box 2; When cross-sectional area is identical, the wall thickness of high temperature box 1 is designed be less than the wall thickness of low temperature box 2.But, above-mentioned two kinds of modes all Shortcomings: in reactor, the installation of fuel assembly is comparatively tight, the cross-sectional area of high temperature box 1 is designed be greater than low temperature box 2 cross-sectional area must cause fuel assembly that difficulty is installed; The wall thickness of high temperature box 1 is designed be less than the wall thickness of low temperature box 2, not only add material cost, also make the bad stability of fuel assembly.Above-mentioned two kinds of modes are combined and also there are the problems referred to above.Although above-mentioned two kinds of modes or both combinations exist certain not enough, goal of the invention can be realized, within protection scope of the present invention.The quantity controlling fuel rod 3 in addition on the basis of above-mentioned two kinds of modes or both combinations also can realize object of the present invention, within protection scope of the present invention.
The present embodiment is ensureing a kind of preferred version under fuel assembly mounting process, stability and low cost prerequisite.
Embodiment 7:
Heat if the chilled water flowed out from low temperature box 2 enters in high temperature box 1 immediately, in high temperature box 1, the partial heat of chilled water can be directly conducted to the chilled water in low temperature box 2, and cooling water temperature in low temperature box 2 is raised.In order to solve emerging problem, as shown in Figure 3, the present embodiment is on the basis of embodiment 5, set up connecting box 7 and the connecting pipe 8 of stainless steel or nickel-base alloy formation, described high temperature box 1 is communicated with by connecting box 7 with low temperature box 2, connecting pipe 8 is arranged in connecting box 7, and connecting pipe 8 is communicated with described high temperature moderator box 51 and low temperature moderator box 52.
Connecting box 7 provides spatial transition for the chilled water in the chilled water in low temperature box 2 and high temperature box 1, prevent chilled water in high temperature box 1 directly by heat conduction in the chilled water in low temperature box 2.Connecting pipe 8 makes the moderator in connecting box 7 and chilled water shunt.In connecting box 7, the temperature of chilled water can, higher than the temperature of chilled water in low temperature box 2, therefore, adopt stainless steel or nickel-base alloy to form connecting box 7 and connecting pipe 8.
Embodiment 8:
As shown in Figure 3, described coolant outlet, on the basis of embodiment 5, is defined as the steam window 9 being arranged at high temperature base 41 side by the present embodiment.High temperature base 41 is connected with reactor vapor chamber, and steam window 9 is arranged in reactor vapor chamber, and steam window 9 is heated to form the chilled water of steam for discharging, and steam is exported by reactor vapor chamber.
Embodiment 9:
As shown in Figure 3, the present embodiment is on the basis of embodiment 5, set up the high temperature base web member 10 be made up of stainless steel or nickel-base alloy, the low temperature base web member 11 be made up of zircaloy, described high temperature base 41 is communicated with described high temperature box 1 by high temperature base web member 10, and described low temperature base 42 is communicated with described low temperature box 2 by low temperature base web member 11.
Embodiment 10:
In order to make structure of the present invention compacter, as shown in Figure 3, on the basis of embodiment 5, set up spreader plate 12, two high temperature boxes 1 are set, in order to make the chilled water shunting gone out in two high temperature boxes 1, spreader plate 12 is arranged at two chambers being divided into high temperature base 41 inside in described high temperature base 41 and not communicating, and described two chambers respectively high temperature box 1 described with two are communicated with.In order to the high temperature moderator box 51 in corresponding two high temperature boxes 1, naturally two high temperature moderator pipes 61 are also provided with, two described high temperature moderator pipes 61 run through two chambers respectively, and high temperature moderator pipe 61 connects with the high temperature moderator box 51 in corresponding high temperature box 1.In order to the temperature making spreader plate 12 can bear high-temperature cooling water, stainless steel or nickel-base alloy is adopted to make spreader plate 12.Arrange two low temperature box 2, described low temperature base 42 is communicated with two described low temperature box 2, two low temperature moderator pipes 62 run through the described low temperature moderator pipe 62 of low temperature base 42, two respectively low temperature moderator box 52 described with two be connected.
Significantly, any scheme recorded in embodiment 5 ~ embodiment 9, according to the description in embodiment 5 ~ embodiment 9, can combine to realize object of the present invention by those skilled in the art.
In order to originally be convenient to understand, also disclosed embodiment 10 below, embodiment 10 is the combination of scheme in embodiment 5 ~ embodiment 9.
As shown in Figure 3, a kind of reactor layered fuel assembly, comprise fuel rod box, the inner space of fuel rod box forms coolant flow passages, described fuel rod box comprises the high temperature box 1 and low temperature box 2 that are interconnected, high temperature box 1 is identical with wall thickness with the cross-sectional area of low temperature box 2, also comprise fuel rod 3, fuel rod 3 is arranged in described high temperature box 1 and low temperature box 2 respectively, the quantity of described high temperature box 1 internal combustion charge bar 3 is less than the quantity of described fuel rod 3 in described low temperature box 2, the cross-sectional area of coolant flow passages in high temperature box 1 is made to be greater than the cross-sectional area of coolant flow passages in low temperature box 2, high temperature box 1 is made up of stainless steel or nickel-base alloy, low temperature box 2 is made up of zircaloy.
Also comprise the high temperature base 41 be made up of stainless steel or nickel-base alloy, high temperature moderator box 51 and high temperature moderator pipe 61, also comprise the low temperature base 42 be made up of zircaloy, low temperature moderator box 52 and low temperature moderator pipe 62, high temperature moderator box 51 is arranged in described high temperature box 1, low temperature moderator box 52 is arranged in described low temperature box 2, high temperature base 41 is communicated with described high temperature box 1, low temperature base 42 is communicated with described low temperature box 2, high temperature moderator box 51 is communicated with low temperature moderator box 52, high temperature moderator pipe 61 runs through high temperature base 41, high temperature moderator pipe 61 is connected with high temperature moderator box 51, low temperature moderator pipe 62 runs through low temperature base 42, low temperature moderator pipe 62 is connected with low temperature moderator box 52, high temperature base 41 offers coolant outlet, low temperature base 42 offers cooling water inlet.Described coolant outlet is the steam window 9 being arranged at high temperature base 41 side.Also comprise the Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure that in embodiment 1 ~ embodiment 4, any one is recorded, the upper end of described distribution drum 16 is near low temperature base 42, described main tap hole 161 is corresponding with cooling water inlet, and described secondary tap hole 162 is corresponding with low temperature moderator pipe 62.Also comprise the spreader plate 12 be made up of stainless steel or nickel-base alloy, spreader plate 12 is arranged at two chambers being divided into high temperature base 41 inside in described high temperature base 41 and not communicating, and each chamber comprises a steam window 9.Described two chambers respectively high temperature box 1 described with two are communicated with, and two described high temperature moderator pipes 61 run through two chambers respectively, and high temperature moderator pipe 61 connects with the high temperature moderator box 51 in corresponding high temperature box 1.Also comprise the connecting box 7 and connecting pipe 8 that are made up of stainless steel or nickel-base alloy, described high temperature box 1 is communicated with by connecting box 7 with low temperature box 2, and connecting pipe 8 is arranged in connecting box 7, and connecting pipe 8 is communicated with described high temperature moderator box 51 and low temperature moderator box 52.Also comprise the high temperature base web member 10 be made up of stainless steel or nickel-base alloy, the low temperature base web member 11 be made up of zircaloy, described high temperature base 41 is communicated with described high temperature box 1 by high temperature base web member 10, and described low temperature base 42 is communicated with described low temperature box 2 by low temperature base web member 11.Described low temperature base 42 is communicated with two described low temperature box 2, and two low temperature moderator pipes 62 run through the described low temperature moderator pipe 62 of low temperature base 42, two and are connected with low temperature moderator box 52 described with two respectively.
Embodiment 11:
The present embodiment, on the basis of embodiment 10, further illustrates the annexation between each parts.
As shown in Figure 3, high temperature base 41 is connected with high temperature base web member 10 by high-temperature substrates 131, high temperature base web member 10 is connected with high temperature box 1 by high temperature upper junction plate 141, high temperature box 1 is connected with connecting box 7 by high temperature lower connecting plate 151, connecting box 7 is connected with low temperature box 2 by low temperature upper junction plate 142, low temperature box 2 is connected with low temperature base web member 11 by low temperature lower connecting plate 152, and low temperature base web member 11 is connected with low temperature base 42 by low temperature substrates 132.Wherein, high-temperature substrates 131, low temperature substrates 132, high temperature upper junction plate 141, low temperature upper junction plate 142, high temperature lower connecting plate 151 and low temperature lower connecting plate 152 all offer the hole that Cooling Water passes through.In order to coordinate the different temperatures of chilled water in high temperature box 1 and low temperature box 2, high-temperature substrates 131, high temperature upper junction plate 141, high temperature lower connecting plate 151 are all made up of stainless steel or nickel-base alloy, and low temperature substrates 132, low temperature upper junction plate 142, low temperature lower connecting plate 152 are all made up of zircaloy.
As mentioned above, just the present invention can be realized preferably.
Claims (9)
1. Supercritical-Pressure Light Water Cooled Reactor fuel assembly, comprise fuel rod box, the inner space of fuel rod box forms coolant flow passages, it is characterized in that: also comprise Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure, Supercritical-Pressure Light Water Cooled Reactor flow adjusting structure comprises distribution drum (16), distribution drum (16) upper surface offers main tap hole (161) and multiple secondary tap hole (162), secondary tap hole (162) is uniformly distributed in main tap hole (161) around;
Described fuel rod box comprises the high temperature box (1) and low temperature box (2) that are interconnected, in high temperature box (1), the cross-sectional area of coolant flow passages is greater than the cross-sectional area of coolant flow passages in low temperature box (2), high temperature box (1) is made up of stainless steel or nickel-base alloy, and low temperature box (2) is made up of zircaloy;
Also comprise the high temperature base (41) be made up of stainless steel or nickel-base alloy, high temperature moderator box (51) and high temperature moderator pipe (61), also comprise the low temperature base (42) be made up of zircaloy, low temperature moderator box (52) and low temperature moderator pipe (62), high temperature moderator box (51) is arranged in described high temperature box (1), low temperature moderator box (52) is arranged in described low temperature box (2), high temperature base (41) is communicated with described high temperature box (1), low temperature base (42) is communicated with described low temperature box (2), high temperature moderator box (51) is communicated with low temperature moderator box (52), high temperature moderator pipe (61) runs through high temperature base (41), high temperature moderator pipe (61) is connected with high temperature moderator box (51), low temperature moderator pipe (62) runs through low temperature base (42), low temperature moderator pipe (62) is connected with low temperature moderator box (52), (41) offer coolant outlet to high temperature base, (42) offer cooling water inlet to low temperature base,
The upper end of described distribution drum (16) is near low temperature base (42), and described main tap hole (161) is corresponding with cooling water inlet, and described secondary tap hole (162) is corresponding with low temperature moderator pipe (62).
2. Supercritical-Pressure Light Water Cooled Reactor fuel assembly according to claim 1, is characterized in that: described main tap hole (161) is up-thin-low-thick stepped hole, and the step surface of described main tap hole (161) is provided with locating slot (163).
3. Supercritical-Pressure Light Water Cooled Reactor fuel assembly according to claim 1, it is characterized in that: also comprise positioning key (17), the diameter of described distribution drum (16) upper end is greater than the diameter of described distribution drum (16) lower end, and positioning key (17) is arranged on the periphery of described distribution drum (16) lower end.
4. Supercritical-Pressure Light Water Cooled Reactor fuel assembly according to claim 1, is characterized in that: the periphery of described distribution drum (16) lower end is provided with conical transition face (164).
5. according to the Supercritical-Pressure Light Water Cooled Reactor fuel assembly in claim 1 ~ 4 described in any one, it is characterized in that: also comprise fuel rod (3), fuel rod (3) is arranged in described high temperature box (1) and low temperature box (2) respectively, and the quantity of described high temperature box (1) internal combustion charge bar (3) is less than the quantity of described fuel rod (3) in described low temperature box (2).
6. according to the Supercritical-Pressure Light Water Cooled Reactor fuel assembly in claim 1 ~ 4 described in any one, it is characterized in that: also comprise the connecting box (7) and connecting pipe (8) that are made up of stainless steel or nickel-base alloy, described high temperature box (1) is communicated with by connecting box (7) with low temperature box (2), connecting pipe (8) is arranged in connecting box (7), and connecting pipe (8) is communicated with described high temperature moderator box (51) and low temperature moderator box (52).
7. according to the Supercritical-Pressure Light Water Cooled Reactor fuel assembly in claim 1 ~ 4 described in any one, it is characterized in that: described coolant outlet is for being arranged at the steam window (9) of high temperature base (41) side.
8. according to the Supercritical-Pressure Light Water Cooled Reactor fuel assembly in claim 1 ~ 4 described in any one, it is characterized in that: also comprise the high temperature base web member (10) be made up of stainless steel or nickel-base alloy, the low temperature base web member (11) be made up of zircaloy, described high temperature base (41) is communicated with described high temperature box (1) by high temperature base web member (10), and described low temperature base (42) is communicated with described low temperature box (2) by low temperature base web member (11).
9. according to the Supercritical-Pressure Light Water Cooled Reactor fuel assembly in claim 1 ~ 4 described in any one, it is characterized in that: comprise two described high temperature boxes (1), also comprise the spreader plate (12) be made up of stainless steel or nickel-base alloy, spreader plate (12) is arranged at two chambers being divided into high temperature base (41) inside in described high temperature base (41) and not communicating, described two chambers respectively high temperature box (1) described with two are communicated with, two described high temperature moderator pipes (61) run through two chambers respectively, high temperature moderator pipe (61) connects with the high temperature moderator box (51) in corresponding high temperature box (1),
Comprise two described low temperature box (2), low temperature base (42) is communicated with two described low temperature box (2), two low temperature moderator pipes (62) run through low temperature base (42), and two described low temperature moderator pipes (62) respectively low temperature moderator box (52) described with two are connected.
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| CN103366837A (en) * | 2013-07-23 | 2013-10-23 | 中国核动力研究设计院 | Supercritical water cooled reactor fuel assembly and reactor core |
| CN112185597B (en) * | 2020-09-30 | 2022-02-01 | 中国核动力研究设计院 | In-reactor flow distribution device and distribution assembly of nuclear power station reactor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171522A (en) * | 1991-10-28 | 1992-12-15 | General Electric Company | Fuel design for high power density forced circulation boiling water reactor |
| JP2005201714A (en) * | 2004-01-14 | 2005-07-28 | Hitachi Ltd | Boiling water reactor, fuel-supporting fixture, fuel assembly, and operation method of the boiling water reactor |
| CN102460594A (en) * | 2009-04-16 | 2012-05-16 | 希尔莱特有限责任公司 | A nuclear fission reactor, flow control assembly, methods therefor and a flow control assembly system |
| CN102737735A (en) * | 2012-07-04 | 2012-10-17 | 中国核动力研究设计院 | Combined square fuel assembly, reactor core and two-pass flowing method of super-critical water reactor |
| CN102800371A (en) * | 2012-05-04 | 2012-11-28 | 中广核工程有限公司 | Flow distribution structure of reactor of nuclear power station |
| CN203055472U (en) * | 2013-02-04 | 2013-07-10 | 中国核动力研究设计院 | Supercritical water cooled reactor flow adjustment structure and fuel component |
-
2013
- 2013-02-04 CN CN201310042954.4A patent/CN103106930B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171522A (en) * | 1991-10-28 | 1992-12-15 | General Electric Company | Fuel design for high power density forced circulation boiling water reactor |
| JP2005201714A (en) * | 2004-01-14 | 2005-07-28 | Hitachi Ltd | Boiling water reactor, fuel-supporting fixture, fuel assembly, and operation method of the boiling water reactor |
| CN102460594A (en) * | 2009-04-16 | 2012-05-16 | 希尔莱特有限责任公司 | A nuclear fission reactor, flow control assembly, methods therefor and a flow control assembly system |
| CN102800371A (en) * | 2012-05-04 | 2012-11-28 | 中广核工程有限公司 | Flow distribution structure of reactor of nuclear power station |
| CN102737735A (en) * | 2012-07-04 | 2012-10-17 | 中国核动力研究设计院 | Combined square fuel assembly, reactor core and two-pass flowing method of super-critical water reactor |
| CN203055472U (en) * | 2013-02-04 | 2013-07-10 | 中国核动力研究设计院 | Supercritical water cooled reactor flow adjustment structure and fuel component |
Non-Patent Citations (1)
| Title |
|---|
| 超临界水冷堆堆芯简化模型流量分配研究;李臻洋等;《核动力工程》;20110630;第32卷(第3期);全文 * |
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