WO2012098874A1 - 加圧水型原子炉 - Google Patents
加圧水型原子炉 Download PDFInfo
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- WO2012098874A1 WO2012098874A1 PCT/JP2012/000277 JP2012000277W WO2012098874A1 WO 2012098874 A1 WO2012098874 A1 WO 2012098874A1 JP 2012000277 W JP2012000277 W JP 2012000277W WO 2012098874 A1 WO2012098874 A1 WO 2012098874A1
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/02—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C1/00—Reactor types
- G21C1/04—Thermal reactors ; Epithermal reactors
- G21C1/06—Heterogeneous reactors, i.e. in which fuel and moderator are separated
- G21C1/08—Heterogeneous reactors, i.e. in which fuel and moderator are separated moderator being highly pressurised, e.g. boiling water reactor, integral super-heat reactor, pressurised water reactor
- G21C1/086—Pressurised water reactors
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Definitions
- This invention relates to a pressurized water reactor.
- coolant flows into the reactor pressure vessel from the inlet nozzle, and the inner surface of the reactor pressure vessel and the reactor core
- the downcomer that is an annular flow path formed between the outer surface and the outer surface is lowered.
- the coolant that reaches the lower end of the downcomer passes through the lower plenum inlet, turns into an upward flow in the lower plenum, passes through a number of upward flow holes opened in the lower core support plate, and the fuel assembly is installed.
- the temperature of the coolant rises, passes through the upper plenum, and exits from the reactor pressure vessel through the outlet nozzle.
- the coolant that has flowed out of the reactor pressure vessel through the outlet nozzle is guided to the steam generator.
- the flow path from the inlet nozzle to the core is designed so that the factors that cause vortices and flow collisions are eliminated as much as possible, and the flow rate of the coolant entering each fuel assembly is stable and uniform.
- a vortex suppression plate is installed in the lower plenum.
- FIG. 11 shows the vicinity of the lower plenum inlet in a conventional general pressurized water reactor, and the flow of the coolant will be described.
- FIG. 11 is a partial vertical sectional view showing only the left side portion of the vertical sectional view of the lower part of the reactor pressure vessel of the conventional pressurized water reactor.
- the coolant flow 21 descending the downcomer 14 passes through the lower plenum inlet 15 and flows into the lower plenum 16.
- the flow velocity of the inflow into the lower plenum 16 increases and the inertia increases.
- the flow 22 in the lower plenum 16 descends along the inner wall surface of the bottom 81 of the reactor pressure vessel of the lower plenum 16 and reaches the center of the reactor bottom.
- a cylindrical porous plate 31 having a large number of inward flow holes (radial through holes) 83 is installed at the lower plenum inlet 15 as shown in FIG. Sometimes.
- a cylindrical porous plate 31 is fixed to the bottom 81 of the reactor pressure vessel via a support member 33 or the like.
- the flow 21 descending the downcomer 14 changes its direction radially inward at the lower plenum inlet 15, passes through the inward flow holes 83 of the cylindrical porous plate 31,
- the flow 41 flows into the plenum 16 in a radially inward direction. Since the flow diffuses when passing through the inward flow hole 83 of the cylindrical porous plate 31, and the flow flows horizontally near the lower surface of the lower core support plate 17, the central portion 23 as shown in FIG. Therefore, the above-mentioned tendency that the flow rate of the coolant flowing through the central fuel assembly is increased is mitigated.
- the flow 42 discharged from the upper inward flow hole 83 flows through the upper flow hole 80 of the peripheral portion 24 of the lower core support plate 17. It will flow across the bottom end.
- an action in the suction direction by the venturi effect that is, the direction in which the fluid in the upward circulation hole 80 is moved downward, acts on the lower end of the upward circulation hole 80 of the peripheral portion 24.
- the cylindrical perforated plate 31 has a new function of reducing the coolant supply to the peripheral fuel assembly, and this is a problem.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to reduce the deviation in the radial distribution of the coolant supply to the fuel assembly in the pressurized water reactor.
- one aspect of a pressurized water reactor has a bottom of a container formed in a convex shape on the lower side, an inlet nozzle is formed on a side surface, and extends vertically.
- a cylindrical reactor pressure vessel having a shaft, a cylindrical reactor tank provided in the reactor pressure vessel to form an annular downcomer between the inner surface of the reactor pressure vessel, and the reactor core vessel A core disposed in the core, a lower core support plate provided in a horizontal direction across the lower part of the core tank below the core and having a large number of upward flow holes, and a bottom of the vessel
- a cylindrical perforated plate that is disposed so as to partition a lower plenum in contact with the bottom of the downcomer and has a plurality of inward flow holes that form a flow path from the bottom of the downcomer to the lower plenum; Having a plurality of inward facings At least a portion of the through hole, it is inclined in a direction rising toward the lower plenum on the side which is open at least in the lower plenum, and wherein.
- Another aspect of the pressurized water reactor according to the embodiment of the present invention is a cylinder having a container bottom portion formed in a convex shape below, an inlet nozzle formed on a side surface, and an axis extending in the vertical direction.
- a cylindrical reactor tank, and a cylindrical reactor tank provided in the reactor pressure vessel and forming an annular downcomer between the inner surface of the reactor pressure vessel, and disposed in the reactor tank
- a lower core support plate provided below the core and extending in a horizontal direction across the lower part of the core tank and having a number of upward flow holes, and a lower plenum in contact with the bottom of the vessel
- a cylindrical perforated plate disposed so as to partition the bottom portion of the downcomer and having a plurality of inward flow holes forming a flow path from the bottom portion of the downcomer to the lower plenum, and In the lower part of the cylindrical perforated plate, the dow The step extending in the circumferential direction and projects sickle side is formed, characterized by.
- FIG. 1 Another aspect of the pressurized water reactor according to the embodiment of the present invention is a cylinder having a container bottom portion formed in a convex shape below, an inlet nozzle formed on a side surface, and an axis extending in the vertical direction.
- a cylindrical reactor tank, and a cylindrical reactor tank provided in the reactor pressure vessel and forming an annular downcomer between the inner surface of the reactor pressure vessel, and disposed in the reactor tank
- a lower core support plate provided below the core and extending in a horizontal direction across the lower part of the core tank and having a number of upward flow holes, and a lower plenum in contact with the bottom of the vessel
- a cylindrical perforated plate disposed so as to partition the bottom portion of the downcomer and having a plurality of inward flow holes forming a flow path from the bottom portion of the downcomer to the lower plenum, and Lower core support plate and cylindrical porous
- FIG. 1 Another aspect of the pressurized water reactor according to the embodiment of the present invention is a cylinder having a container bottom portion formed in a convex shape below, an inlet nozzle formed on a side surface, and an axis extending in the vertical direction.
- a cylindrical reactor tank, and a cylindrical reactor tank provided in the reactor pressure vessel and forming an annular downcomer between the inner surface of the reactor pressure vessel, and disposed in the reactor tank
- a lower core support plate provided below the core and extending in a horizontal direction across the lower part of the core tank and having a number of upward flow holes, and a lower plenum in contact with the bottom of the vessel
- a cylindrical perforated plate disposed so as to partition the bottom portion of the downcomer and having a plurality of inward flow holes forming a flow path from the bottom portion of the downcomer to the lower plenum, and Lower core support plate and cylindrical porous
- the bias in the radial distribution of the coolant supply to the fuel assembly can be reduced in the pressurized water reactor.
- FIG. 1 is an elevational sectional view showing the inside of a reactor pressure vessel of a first embodiment of a pressurized water reactor according to the present invention. It is an expanded vertical sectional view which shows only the left side part of the vertical cross section of the cylindrical perforated plate of FIG. It is a fragmentary sectional view which shows only the left side part of the standing section of the lower part of the reactor pressure vessel of 2nd Embodiment of the pressurized water reactor which concerns on this invention.
- FIG. 5 is an enlarged vertical sectional view showing only a left portion of the vertical cross section of the cylindrical porous plate in FIG. 4. It is an expanded vertical sectional view which shows only the left side part of the vertical cross section of the cylindrical porous plate of 3rd Embodiment of the pressurized water reactor which concerns on this invention. It is a fragmentary sectional view which shows only the left side part of the standing cross section of the lower part of the reactor pressure vessel of the 4th Embodiment of the pressurized water reactor which concerns on this invention. It is an expanded vertical sectional view which shows only the left side part of the vertical cross section of the cylindrical porous plate of FIG.
- FIG. 1 is a partial vertical sectional view showing only a left side portion of a vertical sectional view of a lower part of a reactor pressure vessel according to a first embodiment of a pressurized water reactor according to the present invention.
- FIG. 2 is an elevational sectional view showing the inside of the reactor pressure vessel of the first embodiment of the pressurized water reactor according to the present invention.
- FIG. 3 is an enlarged vertical sectional view showing only the left portion of the vertical cross section of the cylindrical porous plate of FIG.
- the pressurized water reactor includes a reactor pressure vessel 11, a reactor core tank 13 accommodated in the reactor pressure vessel 11, and a reactor core 18 disposed in the reactor tank 13. ing.
- a plurality of fuel assemblies are accommodated in the core 18.
- the reactor pressure vessel 11 is a cylindrical vessel whose axis is the vertical direction.
- the bottom 81 of the reactor pressure vessel 11 protrudes downward in a hemispherical shape, and a lower plenum 16 is formed on the inside thereof.
- a lid 88 that can be opened and closed is attached to the top of the reactor pressure vessel 11.
- the reactor core tank 13 has a cylindrical shape whose axis is a vertical direction, and an annular downcomer 14 is formed between the outer wall of the reactor core tank 13 and the inner wall of the reactor pressure vessel 11.
- An inlet nozzle 12 and an outlet nozzle 50 are provided on the side surface of the reactor pressure vessel 11.
- An upper plenum 19 is formed in the upper part of the core tank 13.
- a disk-shaped lower core support plate 17 is attached to the lower end of the core tank 13 so as to spread horizontally so as to cover the lower end of the core tank 13.
- a number of upward flow holes 80 are formed in the lower core support plate 17.
- a vortex suppressing plate 51 is disposed for stabilizing and uniformizing the flow of the coolant flowing through the upward flow hole 80 of the lower core support plate 17 and flowing into the fuel assembly.
- the vortex suppression plate 51 shown in FIG. 2 is not shown.
- the bottom of the downcomer 14 is a lower plenum inlet 15 through which the coolant descending the downcomer 14 flows into the lower plenum 16, and a cylindrical perforated plate 31 is disposed in the lower plenum inlet 15.
- the cylindrical porous plate 31 is supported by the bottom 81 of the reactor pressure vessel 11 via an annular support member 33.
- the cylindrical perforated plate 31 is disposed below the outer periphery of the lower core support plate 17, and a large number of inward flow holes 83 are formed.
- An annular gap 32 is formed between the lower surface near the outer periphery of the lower core support plate 17 and the upper end of the cylindrical porous plate 31.
- the inward circulation hole 83 has a bent portion in the middle, and the inclination is different between the downcomer 14 side (outside, inflow side) and the lower plenum 16 side (inside, outflow side).
- the inward circulation hole 83 is horizontal on the downcomer 14 side and is upwardly directed by the angle ⁇ toward the lower plenum 16 on the lower plenum 16 side.
- the coolant flows into the reactor pressure vessel 11 from the inlet nozzle 12 and descends the downcomer 14.
- the coolant reaching the lower end of the downcomer passes through the inward flow hole 83 and the annular gap 32 of the cylindrical perforated plate 31 and flows into the lower plenum 16 at the lower plenum inlet 15.
- the flow of the coolant turns upward in the lower plenum 16, passes through the upward flow holes 80 of the lower core support plate 17, and reaches the core 18.
- the temperature of the coolant rises while rising in the reactor core 18, and passes through the upper plenum 19 and exits from the reactor pressure vessel 11 through the outlet nozzle 50.
- the coolant that has exited the reactor pressure vessel from the outlet nozzle 50 is guided to a steam generator (not shown).
- the inward flow hole 83 of the cylindrical perforated plate 31 is directed upward by an angle ⁇ on the outflow side, that is, the lower plenum 16 side. Therefore, the flow of the coolant flowing out of the inward circulation hole 83 in the lower plenum 16 is directed upward and toward the center of the lower plenum 16. Therefore, the flow easily flows into the upward flow hole 80 of the peripheral portion 24, and it becomes possible to improve the decrease in the supply of coolant to the fuel assemblies in the peripheral portion without generating the above-mentioned venturi effect.
- the inward flow hole 83 of the cylindrical perforated plate 31 is horizontal on the inflow side, that is, the downcomer 14 side, so that the entire inward flow hole 83 faces upward toward the lower plenum 16. Compared with a certain case, the flow on the inflow side becomes smooth, and the pressure loss can be reduced.
- FIG. 4 is a partial vertical sectional view showing only the left side portion of the vertical sectional view of the lower part of the reactor pressure vessel of the second embodiment of the pressurized water reactor according to the present invention.
- FIG. 5 is an enlarged vertical sectional view showing only the left portion of the vertical cross section of the cylindrical porous plate of FIG.
- parts that are the same as or similar to those in the first embodiment are denoted by common reference numerals, and redundant description is omitted.
- the inclination angle of the inward flow hole 83 of the cylindrical perforated plate 31 on the lower plenum 16 side (inner side) is changed according to the height position. That is, the inclination angle inside the uppermost cylindrical perforated plate 31 is ⁇ 1, and as the position is lowered, the angles ⁇ 2, ⁇ 3 become smaller, and the lowermost inward circulation hole 83 has an inclination angle of zero. It is a thing.
- Other configurations are the same as those of the first embodiment.
- the coolant that has passed through the inward flow hole 83 in the upper part of the cylindrical porous plate 31 flows upward in the peripheral portion 24. It becomes easy to flow into the lower end of the hole 80, and the coolant that has passed through the lower inward flow hole 83 can flow toward the upward flow hole 80 of the farther central portion 23.
- By adjusting the angle of each inward flow hole 83 in this way it is possible to improve the decrease in the supply of coolant to the peripheral fuel assembly and to make the entire core inlet flow distribution uniform. .
- FIG. 6 is an enlarged vertical sectional view showing only the left portion of the vertical cross section of the cylindrical porous plate of the third embodiment of the pressurized water reactor according to the present invention.
- This embodiment is a modification of the second embodiment, and the same or similar parts as those of the second embodiment are denoted by the same reference numerals, and redundant description is omitted.
- a stepped surface 91 having a substantially constant height is provided on the downcomer 14 side of the cylindrical porous plate 31, that is, the outer surface.
- the lower end height of the uppermost inward flow hole 83 and the height of the step surface 91 are the same.
- Other configurations are the same as those of the second embodiment.
- the width of the stepped surface 91 is, the larger the effect of increasing the coolant guided to the inward flow hole 83 is.
- the width of the step surface is preferably 20% or more of the hole diameter.
- the hole shape of the inward flow hole 83 is the same as that of the second embodiment, but this is not limited to the increase in the coolant in the surrounding fuel assembly, and the target radial position
- the coolant flow rate can be freely increased or decreased.
- FIG. 7 is a partial vertical sectional view showing only the left side of the vertical sectional view of the lower part of the reactor pressure vessel of the fourth embodiment of the pressurized water reactor according to the present invention.
- FIG. 8 is an enlarged vertical sectional view showing only the left portion of the vertical cross section of the cylindrical porous plate of FIG.
- parts that are the same as or similar to those in the first to third embodiments are denoted by common reference numerals, and redundant description is omitted.
- annular protrusion 85 protruding downward near the outer periphery of the lower core support plate 17 is provided.
- the upper end surface 72 of the cylindrical porous plate 31 faces the lower end surface of the annular protrusion 85 with the annular gap 32 therebetween.
- a portion near the lower plenum 16 of the upper end surface 72 of the cylindrical perforated plate 31 is provided with an inclination so as to rise toward the lower plenum 16 side.
- a portion of the lower end surface of the annular protrusion 85 facing the lower plenum 16 is also inclined so as to rise toward the lower plenum 16 side, and the gap 32 is substantially constant.
- the configuration of the inward flow hole 83 of the cylindrical perforated plate 31 is linear in the horizontal direction as in the prior art shown in FIG.
- the coolant is supplied to the upward flow path 80 of the peripheral portion 24 of the lower core support plate 17.
- Stream 71 is smooth.
- the annular protrusion 85 is provided on the lower core support plate 17, the height position of the gap 32 moves downward from the inlet portion, that is, the lower end portion of the upward flow path 80 of the lower core support plate 17. The venturi effect due to the lateral flow of coolant flowing through and into the lower plenum 16 is mitigated. Thereby, the flow of the coolant to the upward flow path 80 of the peripheral portion 24 of the lower core support plate 17 is promoted.
- FIG. 9 is a partial vertical sectional view showing only the left side portion of the vertical sectional view of the lower part of the reactor pressure vessel of the fifth embodiment of the pressurized water reactor according to the present invention.
- the fifth embodiment is a modification of the fourth embodiment, and the same or similar parts as those of the fourth embodiment are denoted by the same reference numerals, and redundant description is omitted.
- the cylindrical porous plate 31 is supported by the bottom 81 of the reactor pressure vessel 11 via the support member 33.
- the upper surface of the cylindrical porous plate 31 is fixed to the lower surface of the lower core support plate 17 and is suspended.
- the upper end surface of the cylindrical perforated plate 31 is discretely extended in the circumferential direction by several heights by the height of the gap 32, and joined by groove welding or the like when it contacts the lower core support plate 17.
- FIG. 10 is a partial vertical sectional view showing only the left side portion of the vertical cross section in the vicinity of the cylindrical porous plate of the sixth embodiment of the pressurized water reactor according to the present invention.
- the sixth embodiment is a modification of the fourth embodiment, and the same or similar parts as those of the fourth embodiment are denoted by common reference numerals, and redundant description is omitted.
- the lower corner portion 44 of the gap entrance is more protruded toward the downcomer 14 side (radially outward) than the upper corner portion 43 of the gap 32, so that the height of the corner 32 on the inflow side of the gap 32 is approximately.
- the protrusion 74 which becomes a fixed surface is provided.
- Other configurations are the same as those of the fourth embodiment.
- the protrusion width is preferably 20% or more of the gap height.
- the downcomer 14 side of the inward circulation hole 83 of the cylindrical perforated plate 31 is horizontal, but if the inclination is smaller than the lower plenum 16 side, the downcomer 14 side is the lower part. It may have a slope that rises toward the plenum 16. Furthermore, the downcomer 14 side of the inward circulation hole 83 may have an inclination that descends toward the lower plenum 16.
- the inward circulation hole 83 has an inclination that rises toward the lower plenum 16, it may not be bent in the middle.
- the step is provided only for the uppermost inward circulation hole 83, but is not limited to that for the uppermost inward circulation hole 83, and is similar to other positions. You may provide the level
- the inclination angle of the inward flow hole 83 of the cylindrical perforated plate 31 on the lower plenum 16 side (inner side) is the same as in the second embodiment (FIG. 5).
- the inclination angle on the lower plenum 16 side of the inward flow hole 83 of the cylindrical porous plate 31 is set to the height position. Regardless of this, it may be constant.
- the inclination angle on the lower plenum 16 side of the inward flow hole 83 of the cylindrical perforated plate 31 may be horizontal as in the prior art.
- the cylindrical perforated plate 83 is oriented horizontally as in the prior art (FIG. 12), but if tilted in the same manner as in any of the first to third embodiments, effective.
- the cylindrical perforated plate 31 and the reactor pressure vessel 11 are cylindrical, but these are not limited to a cylindrical shape, and may be, for example, a cylindrical shape having an elliptical cross section.
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Abstract
Description
図1は、本発明に係る加圧水型原子炉の第1の実施形態の原子炉圧力容器の下部の立断面の左側部分のみを示す部分立断面図である。図2は、本発明に係る加圧水型原子炉の第1の実施形態の原子炉圧力容器の内部を示す立断面図である。図3は、図1の円筒状多孔板の立断面の左側部分のみを示す拡大立断面図である。
図4は、本発明に係る加圧水型原子炉の第2の実施形態の原子炉圧力容器の下部の立断面の左側部分のみを示す部分立断面図である。図5は、図4の円筒状多孔板の立断面の左側部分のみを示す拡大立断面図である。ここで、第1の実施形態と同一または類似の部分には共通の符号を付して、重複説明は省略する。
図6は、本発明に係る加圧水型原子炉の第3の実施形態の円筒状多孔板の立断面の左側部分のみを示す拡大立断面図である。この実施形態は第2の実施形態の変形であって、第2の実施形態と同一または類似の部分には共通の符号を付して、重複説明は省略する。
図7は、本発明に係る加圧水型原子炉の第4の実施形態の原子炉圧力容器の下部の立断面の左側部分のみを示す部分立断面図である。図8は、図7の円筒状多孔板の立断面の左側部分のみを示す拡大立断面図である。第4の実施形態の説明で、第1ないし第3の実施形態と同一または類似の部分には共通の符号を付して、重複説明は省略する。
図9は、本発明に係る加圧水型原子炉の第5の実施形態の原子炉圧力容器の下部の立断面の左側部分のみを示す部分立断面図である。
図10は、本発明に係る加圧水型原子炉の第6の実施形態の円筒状多孔板の付近の立断面の左側部分のみを示す部分立断面図である。
第1の実施形態(図3)で、円筒状多孔板31の内向き流通孔83のダウンカマ14側は水平であるとしたが、下部プレナム16側の傾斜よりも小さければ、ダウンカマ14側は下部プレナム16に向かって上昇する傾斜を持っていてもよい。さらに、内向き流通孔83のダウンカマ14側が下部プレナム16に向かって下降する傾斜を持っていてもよい。
12…入口ノズル
13…炉心槽
14…ダウンカマ
15…下部プレナム入口
16…下部プレナム
17…下部炉心支持板
18…炉心
19…上部プレナム
23…中央部
24…周辺部
31…円筒状多孔板
32…すき間
33…支持部材
43…角部
44…角部
50…出口ノズル
51…渦抑制板
72…上端面
74…突き出し部
80…上向き流通孔
81…底部
83…内向き流通孔
85…環状突起
88…蓋
91…段差面
Claims (13)
- 下方に凸形状に形成された容器底部を有して側面に入口ノズルが形成され上下方向に延びる軸を有する筒状の原子炉圧力容器と、
前記原子炉圧力容器内に設けられて該原子炉圧力容器の内側面との間で環状のダウンカマを形成する筒状の炉心槽と、
前記炉心槽内に配置された炉心と、
前記炉心の下方で前記炉心槽の下部を横断して水平方向に広がるように設けられて多数の上向き流通孔が形成された下部炉心支持板と、
前記容器底部に接する下部プレナムと前記ダウンカマの底部とを区画するように配置されて、前記ダウンカマの底部から前記下部プレナムへの流路を構成する複数の内向き流通孔が形成された筒状多孔板と、
を有し、
前記複数の内向き流通孔の少なくとも一部は、少なくとも前記下部プレナムに開口する側で下部プレナムに向かって上昇する向きに傾斜していること、を特徴とする加圧水型原子炉。 - 前記複数の内向き流通孔の少なくとも一部は途中で傾斜が変わっていて、前記ダウンカマ側よりも前記下部プレナムに開口する側で、下部プレナムに向かって大きく上昇する向きに傾斜していること、を特徴とする請求項1に記載の加圧水型原子炉。
- 前記複数の内向き流通孔の前記筒状多孔板での位置が高いほど当該内向き流通孔の前記下部プレナムに開口する側での傾斜が大きいこと、を特徴とする請求項1または請求項2に記載の加圧水型原子炉。
- 前記筒状多孔板の下部に、前記ダウンカマ側に突出して周方向に延びる段差が形成されていること、を特徴とする請求項1または請求項2に記載の加圧水型原子炉。
- 下方に凸形状に形成された容器底部を有して側面に入口ノズルが形成され上下方向に延びる軸を有する筒状の原子炉圧力容器と、
前記原子炉圧力容器内に設けられて該原子炉圧力容器の内側面との間で環状のダウンカマを形成する筒状の炉心槽と、
前記炉心槽内に配置された炉心と、
前記炉心の下方で前記炉心槽の下部を横断して水平方向に広がるように設けられて多数の上向き流通孔が形成された下部炉心支持板と、
前記容器底部に接する下部プレナムと前記ダウンカマの底部とを区画するように配置されて、前記ダウンカマの底部から前記下部プレナムへの流路を構成する複数の内向き流通孔が形成された筒状多孔板と、
を有し、
前記筒状多孔板の下部に、前記ダウンカマ側に突出して周方向に延びる段差が形成されていること、を特徴とする加圧水型原子炉。 - 前記段差よりも上方と下方の両方に複数の前記内向き流通孔が形成されていること、を特徴とする請求項4に記載の加圧水型原子炉。
- 前記段差の高さと同じ高さに前記複数の内向き流通孔の少なくとも一部の内向き流通孔が形成されていること、を特徴とする請求項4に記載の加圧水型原子炉。
- 前記下部炉心支持板と前記筒状多孔板の上端部との間に、前記ダウンカマの底部から前記下部プレナムへの流路を構成する水平に延びた環状のすき間が形成され、
前記すき間の少なくとも前記下部プレナム側が前記下部プレナムに向かって上昇する向きに傾斜していること、を特徴とする請求項1または請求項2に記載の加圧水型原子炉。 - 下方に凸形状に形成された容器底部を有して側面に入口ノズルが形成され上下方向に延びる軸を有する筒状の原子炉圧力容器と、
前記原子炉圧力容器内に設けられて該原子炉圧力容器の内側面との間で環状のダウンカマを形成する筒状の炉心槽と、
前記炉心槽内に配置された炉心と、
前記炉心の下方で前記炉心槽の下部を横断して水平方向に広がるように設けられて多数の上向き流通孔が形成された下部炉心支持板と、
前記容器底部に接する下部プレナムと前記ダウンカマの底部とを区画するように配置されて、前記ダウンカマの底部から前記下部プレナムへの流路を構成する複数の内向き流通孔が形成された筒状多孔板と、
を有し、
前記下部炉心支持板と前記筒状多孔板の上端部との間に、前記ダウンカマの底部から前記下部プレナムへの流路を構成する水平に延びた環状のすき間が形成され、
前記すき間の少なくとも前記下部プレナム側が前記下部プレナムに向かって上昇する向きに傾斜していること、を特徴とする加圧水型原子炉。 - 前記下部炉心支持板には、前記筒状多孔板の上端部に向かって下方に突出する環状突出部が形成されていること、を特徴とする請求項8に記載の加圧水型原子炉。
- 前記筒状多孔板は前記下部炉心支持板に支持されていることを特徴とする請求項8に記載の加圧水型原子炉。
- 前記筒状多孔板の上端部外周が、前記下部炉心支持板の下端部外周よりも外側に突出していること、を特徴とする請求項8に記載の加圧水型原子炉。
- 下方に凸形状に形成された容器底部を有して側面に入口ノズルが形成され上下方向に延びる軸を有する筒状の原子炉圧力容器と、
前記原子炉圧力容器内に設けられて該原子炉圧力容器の内側面との間で環状のダウンカマを形成する筒状の炉心槽と、
前記炉心槽内に配置された炉心と、
前記炉心の下方で前記炉心槽の下部を横断して水平方向に広がるように設けられて多数の上向き流通孔が形成された下部炉心支持板と、
前記容器底部に接する下部プレナムと前記ダウンカマの底部とを区画するように配置されて、前記ダウンカマの底部から前記下部プレナムへの流路を構成する複数の内向き流通孔が形成された筒状多孔板と、
を有し、
前記下部炉心支持板と前記筒状多孔板の上端部との間に、前記ダウンカマの底部から前記下部プレナムへの流路を構成する水平に延びた環状のすき間が形成され、
前記筒状多孔板の上端部外周が、前記下部炉心支持板の下端部外周よりも外側に突出していること、を特徴とする加圧水型原子炉。
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US13/980,145 US20140037038A1 (en) | 2011-01-19 | 2012-01-18 | Pressurized water reactor |
EP12737180.5A EP2667383A4 (en) | 2011-01-19 | 2012-01-18 | PRESSURE WATER REACTOR |
CN2012800057047A CN103329211A (zh) | 2011-01-19 | 2012-01-18 | 压水反应堆 |
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CN103177780A (zh) * | 2013-01-14 | 2013-06-26 | 上海核工程研究设计院 | 一种压水核反应堆流量分配装置 |
CN103137220B (zh) * | 2013-02-04 | 2015-09-23 | 中国核动力研究设计院 | 一种适用于超临界水冷堆的围板式集流结构 |
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CN103871502A (zh) * | 2012-12-14 | 2014-06-18 | 中国核动力研究设计院 | 一种核反应堆下腔室筒式流量分配装置 |
CN103871500B (zh) * | 2012-12-14 | 2016-08-10 | 中国核动力研究设计院 | 一种核反应堆下腔室筒状流量分配装置 |
US10535436B2 (en) * | 2014-01-14 | 2020-01-14 | Ge-Hitachi Nuclear Energy Americas Llc | Nuclear reactor chimney and method of improving core inlet enthalpy using the same |
FR3075448B1 (fr) * | 2017-12-19 | 2020-01-03 | Electricite De France | Ensemble de tranquillisation de flux de reacteur nucleaire |
RU2687054C1 (ru) * | 2018-06-06 | 2019-05-07 | федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский ядерный университет "МИФИ" (НИЯУ МИФИ) | Ядерный реактор |
CN109102907A (zh) * | 2018-07-20 | 2018-12-28 | 中广核研究院有限公司 | 一种新型堆芯金属反射层组件 |
CN111916230B (zh) * | 2020-08-13 | 2022-02-11 | 中国核动力研究设计院 | 一种可实现下降段流量周向均匀分布的压水堆 |
CN112728971B (zh) * | 2020-12-30 | 2021-10-19 | 西安交通大学 | 一种核热推进系统中的预热装置 |
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CN103177780A (zh) * | 2013-01-14 | 2013-06-26 | 上海核工程研究设计院 | 一种压水核反应堆流量分配装置 |
CN103177780B (zh) * | 2013-01-14 | 2015-11-25 | 上海核工程研究设计院 | 一种压水核反应堆流量分配装置 |
CN103137220B (zh) * | 2013-02-04 | 2015-09-23 | 中国核动力研究设计院 | 一种适用于超临界水冷堆的围板式集流结构 |
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RU2013138442A (ru) | 2015-02-27 |
CN103329211A (zh) | 2013-09-25 |
JP2012149996A (ja) | 2012-08-09 |
US20140037038A1 (en) | 2014-02-06 |
EP2667383A4 (en) | 2016-07-13 |
RU2551124C2 (ru) | 2015-05-20 |
KR20130103606A (ko) | 2013-09-23 |
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