C-shaped containment of high-temperature gas-cooled nuclear reactor

Abstract

The invention is applied to the technical field of high-temperature gas-cooled nuclear reactors, and particularly relates to a C-shaped containment of a high-temperature gas-cooled nuclear reactor. Most of the existing reactor containment domes are circular (hemispherical in three-dimensional view), and in order to enclose all modules of a reactor, the containment domes are generally large in span, complex in structure and high in cost. The invention discloses a containment which is a closed C-shaped cylinder in the overall structure and comprises an outer arc wall, an inner arc wall, a gable wall and a dome. The outer arc wall and the inner arc wall are two circular arc wall bodies which are concentric and equal in central angle, jointly form an open annular cylinder and are covered by the dome. Two sides of the gable are connected with the outer arc wall and the inner arc wall, and the upper end of the gable is connected with the dome. The arch-shaped opening end face of the dome is in the shape of a three-centered circular arch, the three-centered circular arch is composed of three sections of circular arcs, and the three circular arcs are mutually and internally tangent. The span of the dome can be reduced, and the requirement of the multi-module high-temperature gas-cooled nuclear reactor containment on the space can be met by changing the radius difference and the central angle of the inner arc wall and the outer arc wall.

Description

Technical Field

[0001] The present invention is applied to the technical field of high-temperature gas-cooled nuclear reactor technology, and specifically relates to a C-shaped containment vessel for a high-temperature gas-cooled nuclear reactor. Background Art

[0002] High-temperature gas-cooled nuclear reactors have the characteristics of inherent safety, modular design and construction, and multi-purpose applications, and are considered to be the most promising reactor type of the fourth generation. The containment vessel is a part of the high-temperature gas-cooled nuclear reactor. It can not only prevent the spread of radioactive substances from polluting the surrounding environment, but also often serves as the enclosure structure of the reactor building to protect the reactor equipment system from adverse external effects. It is a special container structure with a huge body. The domes of existing reactor containments are mostly circular (hemispherical in three-dimensional view). To enclose all the reactor modules and meet the size requirements of channels, etc., the dome span of the containment is usually very large. For example, the dome span of the containment of a six-module high-temperature gas-cooled reactor reaches 110.6 m. At present, the circular dome structure is complex, with high construction difficulty, long construction period, and high cost. There is an urgent need to design a high-temperature gas-cooled nuclear reactor containment with a small dome span, which can not only enclose multiple reactor modules, but also save construction cost while meeting the process requirements. Summary of the Invention

[0003] The purpose of the present invention is to provide a containment vessel for a high-temperature gas-cooled nuclear reactor, which can meet the size requirements of process equipment and channels inside the containment of a multi-module high-temperature gas-cooled reactor on the basis of reducing the dome span, and ensure that the containment structure meets the process requirements and is safe and reliable.

[0004] The technical solution of the present invention is as follows:

[0005] A C-shaped containment vessel for a high-temperature gas-cooled nuclear reactor, the overall structure is a closed C-shaped cylinder, including an outer arc wall, an inner arc wall, gable walls, and a dome; the outer arc wall and the inner arc wall form an open annular cylinder; the dome is at the upper end of the open annular cylinder, the inner end face of the dome is connected to the inner arc wall, the outer end face of the dome is connected to the outer arc wall, and the arched open end face of the dome is connected to the upper end of the gable wall; both sides of the gable wall are connected to the outer arc wall and the inner arc wall.

[0006] The outer arc wall and the inner arc wall are two arc-shaped walls with the same center of circle and equal central angles. The radius of the outer arc wall is greater than the radius of the inner arc wall. The radii and central angles of the outer arc wall and the inner arc wall can be adjusted according to the space required by the high-temperature gas-cooled reactor module.

[0007] The radius difference between the outer arc wall and the inner arc wall is the same as the width of the dome.

[0008] The end face shape of the arched opening of the dome is a three-centered circular arch, which is composed of a first circular arc, a second circular arc, and a third circular arc. The first circular arc is in the middle of the three-centered circular arch, and the second and third circular arcs are on both sides of the first circular arc. The three circular arcs are mutually inscribed.

[0009] The center of the first circular arc is O1, and the center O1 is on the symmetry axis of the three-centered circular arch.

[0010] The center of the second circular arc is O2, and the radius is O2d. The first circular arc is tangent to the second circular arc at the first tangent point d.

[0011] The center of the third circular arc is O3, and the radius is O3e. The first circular arc is tangent to the third circular arc at the second tangent point e.

[0012] The connection line between the center O2 of the second circular arc and the center O3 of the third circular arc is vertically bisected by the symmetry axis of the three-centered circular arch.

[0013] The radius O2d of the second circular arc is the same as the radius O3e of the third circular arc.

[0014] There are two gables.

[0015] The beneficial effects of the present invention are as follows:

[0016] The present invention mainly solves the problems that due to the increase in the number of high-temperature gas-cooled nuclear reactor modules, the span of the containment dome is large and the structure is complex. The present invention provides a C-shaped containment for a high-temperature gas-cooled nuclear reactor, which adds an inner arc wall on the basis of the outer arc wall and covers the opening ring cylinder composed of the inner arc wall and the outer arc wall with a dome. It can not only reduce the span of the dome, but also meet the space requirements of the containment of the multi-module high-temperature gas-cooled nuclear reactor by changing the radii and central angles of the inner arc wall and the outer arc wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Plan view of a C-shaped containment for a high-temperature gas-cooled nuclear reactor

[0018] Figure 2 Sectional view of a C-shaped containment for a high-temperature gas-cooled nuclear reactor

[0019] Figure 3 Sectional view of the dome of a C-shaped containment for a high-temperature gas-cooled nuclear reactor

[0020] Figure 4 Axonometric disassembly view of a C-shaped containment for a high-temperature gas-cooled nuclear reactor

[0021] Wherein 1. outer arc wall, 2. inner arc wall, 3. gable, 4. dome. DETAILED DESCRIPTION OF THE INVENTION

[0022] The following is combined with Figures 1 to 4The following provides a further description of a C-shaped containment for a high-temperature gas-cooled nuclear reactor of the present invention with specific implementation cases.

[0023] Figure 1 Figure 1 is a plan view of a C-shaped containment for a high-temperature gas-cooled nuclear reactor. The C-shaped containment includes an outer arc wall 1, an inner arc wall 2, gable walls 3, and a dome 4. The outer arc wall 1 and the inner arc wall 2 have the same center position and the same central angle. The radius difference between the outer arc wall 1 and the inner arc wall 2 is the width of the gable wall 3. There are two gable walls 3 connecting the outer arc wall 1 and the inner arc wall 2. The radius difference between the outer arc wall 1 and the inner arc wall 2 only needs to meet the requirements of the equipment and channel dimensions of the multi-module high-temperature gas-cooled reactor. The plan views of the outer arc wall 1, the inner arc wall 2, and the gable wall 3 form a closed C shape.

[0024] Figure 2 Figure 2 is a sectional view of a C-shaped containment for a high-temperature gas-cooled nuclear reactor. The dome 4 is above the outer arc wall 1 and the inner arc wall 2, connecting the outer arc wall 1 and the inner arc wall 2.

[0025] Figure 3 Figure 3 is a sectional view of the dome of a C-shaped containment for a high-temperature gas-cooled nuclear reactor. The section of the dome 4 is a three-centered circular arch, which is composed of a first circular arc de, a second circular arc ad, and a third circular arc eb. The first circular arc de is in the middle of the three-centered circular arch. The second circular arc ad and the third circular arc eb are on both sides of the first circular arc. The three circular arcs are mutually inscribed.

[0026] The center of the first circular arc de is O1. O1c, O1d, and O1e are the radii of the first circular arc. The center O1 is on the axis of symmetry of the three-centered circular arch. The line where O1c is located is the axis of symmetry of the three-centered circular arch. The width of the dome 4 is ab, and O1c is perpendicular to ab.

[0027] The center of the second circular arc is O2, and the radius is O2d. The first circular arc is tangent to the second circular arc at the first tangent point d. The tangent line passing through the first tangent point d is perpendicular to O1d and O2d.

[0028] The center of the third circular arc is O3, and the radius is O3e. The first circular arc is tangent to the third circular arc at the second tangent point e. The tangent line passing through the second tangent point e is perpendicular to O1e and O3e.

[0029] The radius O2d of the second circular arc is the same as the radius O3e of the third circular arc.

[0030] O2O3 is perpendicularly bisected by O1c.

[0031] Figure 4It is an axonometric disassembly drawing of the C-shaped containment of a high-temperature gas-cooled nuclear reactor. The overall structure of the containment is a closed C-shaped cylinder, including an outer arc wall 1, an inner arc wall 2, gable walls 3, and a dome 4; the outer arc wall 1 and the inner arc wall 2 form an open annular cylinder; the dome 4 is at the upper end of the open annular cylinder, the inner end face of the dome 4 is connected to the inner arc wall 2, the outer end face of the dome 4 is connected to the outer arc wall 1, and the arched open end face of the dome 4 is connected to the upper end of the gable wall 3; both sides of the gable wall 3 are connected to the outer arc wall 1 and the inner arc wall 2.

[0032] Combined with specific embodiments, the dome of the containment of the six-module high-temperature gas-cooled reactor adopts a primary-secondary combined frame structure, mainly composed of main steel beams, secondary steel beams, and steel plates. The bottom of the dome uses steel plates, which is convenient for construction and does not affect the construction and equipment installation below the dome. The dome is arranged in blocks, and the need for multi-set main equipment to be hoisted in batches with the top opened separately can be met without opening the top as a whole.

[0033] In the present invention, the containment of the high-temperature gas-cooled nuclear reactor adopts a structural arrangement combining inner and outer arc walls to reduce the span of the dome. Compared with the 110.6m-span circular dome of the six-module high-temperature gas-cooled reactor, the span of the annular containment dome with inner and outer shells can be reduced to about 26m by setting the inner and outer arc walls. The radius difference and central angle between the inner and outer arc walls can be flexibly adjusted. The inner and outer arc walls share the same center, and the radius difference between the two is the distance between the spaces enclosed by the two, which can be flexibly adjusted within a certain range according to the requirements of process equipment and channel dimensions. When the number of modules of the nuclear steam supply system increases, the inner and outer arc walls can be increased simultaneously and the central angle can be adjusted, so that the span of the dome, that is, the radius difference between the inner and outer shells, can be kept unchanged.

Claims

1. A C-shaped containment vessel for a high-temperature gas-cooled nuclear reactor, characterized in that: The overall structure is a closed C-shaped cylinder, including an outer arc wall (1), an inner arc wall (2), gable walls (3) and a dome (4); the outer arc wall (1) and the inner arc wall (2) form an open annular cylinder; the dome (4) is at the upper end of the open annular cylinder, the inner end face of the dome (4) is connected to the inner arc wall (2), the outer end face of the dome (4) is connected to the outer arc wall (1), and the arched open end face of the dome (4) is connected to the upper end of the gable wall (3); both sides of the gable wall (3) are connected to the outer arc wall (1) and the inner arc wall (2).

2. The C-shaped containment of a high-temperature gas-cooled nuclear reactor according to claim 1, characterized in that: The outer arc wall (1) and the inner arc wall (2) are two arc-shaped walls with the same center of circle and equal central angles. The radius of the outer arc wall (1) is greater than that of the inner arc wall. The radii and central angles of the outer arc wall (1) and the inner arc wall (2) can be adjusted according to the space required by the high-temperature gas-cooled reactor module.

3. The C-shaped containment of a high-temperature gas-cooled nuclear reactor according to claim 2, characterized in that: The difference in radius between the outer arc wall (1) and the inner arc wall (2) is the same as the width of the dome (4).

4. The C-shaped containment of a high-temperature gas-cooled nuclear reactor according to claim 1, characterized in that: The arched open end face of the dome (4) is in the shape of a three-centered circular arch, which is composed of a first arc, a second arc and a third arc. The first arc is in the middle of the three-centered circular arch, and the second arc and the third arc are on both sides of the first arc. The three arcs are mutually inscribed.

5. The C-shaped containment of a high-temperature gas-cooled nuclear reactor according to claim 4, characterized in that: The center of the first arc is O1, and the radius is O1c. The center O1 is on the axis of symmetry of the three-centered circular arch.

6. A C-shaped containment of a high-temperature gas-cooled nuclear reactor according to claim 5, characterized in that: The center of the second arc is O2, and the radius is O2d. The first arc is tangent to the second arc at d.

7. A C-shaped containment of a high-temperature gas-cooled nuclear reactor according to claim 6, characterized in that: The center of the third arc is O3, and the radius is O3e. The first arc is tangent to the second arc at e.

8. A C-shaped containment of a high-temperature gas-cooled nuclear reactor according to claim 5, characterized in that: The line connecting the center O2 of the second arc and the center O3 of the third arc is vertically bisected by the axis of symmetry of the three-centered circular arch.

9. A C-shaped containment of a high-temperature gas-cooled nuclear reactor according to claim 7, characterized in that: The radius O2d of the second arc is the same as the radius O3e of the third arc.

10. A C-shaped containment of a high-temperature gas-cooled nuclear reactor according to claim 1, characterized in that: There are two gable walls (3).

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