A flexible connection device for fuel transfer channel of pool-type heating reactor

Abstract

The present invention relates to a flexible connection device for the fuel transfer channel of a pool-type heating reactor. By using the device provided by the present invention, the fuel transfer channel can be ensured to be connected, and the rupture of the fuel transfer channel caused by the uncoordinated deformation of the reactor water pool and the spent fuel pool can be avoided. The inner sealing ring and the outer sealing ring of the device provided by the present invention are both made of rubber and adopt a corrugated telescopic structure, which can adapt to the uncoordinated deformation of the reactor water pool and the spent fuel pool and can avoid the rupture of the fuel transfer channel; the inner sealing ring and the outer sealing ring form a double-channel seal, and when the inner sealing ring is damaged, the outer sealing ring can still ensure that the pool water does not leak into the surrounding environment. Moreover, a leak detector for detecting leaked pool water is installed on the outer sealing ring of the device provided by the present invention. Once the pool water leaks from the inner sealing ring, an alarm signal can be issued in time; in addition, a water collecting pipe is also installed on the outer sealing ring, which can collect the leaked pool water and guide it to a designated area.

Description

Technical Field

[0001] The invention belongs to the technical field of fuel transfer for pool-type heating reactors and relates to a flexible connection device for a fuel transfer channel for a pool-type heating reactor. Background Art

[0002] A pool-type low-temperature heating reactor places the reactor core deep within a normal-pressure water pool, leveraging the hydrostatic pressure of the water layer to raise the core outlet temperature to meet heating requirements. Using nuclear energy to provide district heating, pool-type low-temperature heating reactors can effectively improve the energy mix and alleviate the increasingly severe energy supply shortage.

[0003] Pool-type low-temperature heating reactors undergo underwater refueling, with the reactor water pool and spent fuel pool connected by a fuel transfer channel. During reactor operation, as the reactor water pool heats up, the pool expands and deforms with the rising water temperature. This mismatch in thermal expansion and contraction between the two pools can cause the fuel transfer channel to rupture, leading to a loss of connectivity between the two pools and possible leakage of radioactive pool water. Summary of the Invention

[0004] In response to the defects existing in the prior art, the purpose of the present invention is to provide a flexible connection device for the fuel transfer channel of a pool-type heating reactor. By providing an inner sealing ring and an outer sealing ring made of a flexible material, a double-channel sealing structure is formed to adapt to the deformation inconsistency of the reactor water pool and the spent fuel pool, thereby avoiding rupture of the fuel transfer channel; moreover, in the event of damage to the inner sealing ring, the outer sealing ring can still ensure that the pool water does not leak into the surrounding environment.

[0005] To achieve this object, the present invention provides a flexible connection device for a fuel transfer channel of a pool-type heating reactor, comprising an inner sealing ring, an inner pressure plate, an inner pressure plate support, an outer sealing ring, an outer pressure plate, and an outer pressure plate support, wherein:

[0006] The inner pressure plate is fixedly connected to the inner pressure plate support, and the two inner pressure plate supports are respectively fixed on the fuel transfer channel on the reactor water pool side and the fuel transfer channel on the spent fuel pool side; the two ends of the inner sealing ring are respectively fixedly sealed between the inner pressure plate support and the fuel transfer channel on the reactor water pool side and between the inner pressure plate support and the fuel transfer channel on the spent fuel pool side through the inner pressure plate;

[0007] The external pressure plate is fixedly connected to the external pressure plate support, and the two external pressure plate supports are respectively fixed on the external structure of the fuel transfer channel on the reactor water pool side and the external structure of the fuel transfer channel on the spent fuel pool side; the two ends of the external sealing ring are respectively fixedly sealed between the external pressure plate support and the external structure of the fuel transfer channel on the reactor water pool side and between the external pressure plate support and the external structure of the fuel transfer channel on the spent fuel pool side through the external pressure plate.

[0008] Furthermore, the device also includes a water collecting pipe, which is installed at the bottom of the outer sealing ring.

[0009] Furthermore, the device also includes a leakage detector, which is installed on the outer sealing ring.

[0010] Furthermore, the inner sealing ring and the outer sealing ring are both made of rubber.

[0011] Furthermore, the inner sealing ring is a bellows telescopic structure.

[0012] Furthermore, the inner pressure plate and the inner pressure plate support are fixedly connected by bolts;

[0013] Through the inner pressure plate and bolts, the two ends of the inner sealing ring are respectively fixed and sealed between the inner pressure plate support and the fuel transfer channel on the reactor water pool side, and between the inner pressure plate support and the fuel transfer channel on the spent fuel pool side.

[0014] Furthermore, the outer sealing ring is a bellows telescopic structure.

[0015] Furthermore, the outer pressure plate is fixedly connected to the outer pressure plate support by bolts;

[0016] Through the external pressure plate and bolts, the two ends of the external sealing ring are respectively fixed and sealed between the external pressure plate support and the external structure of the fuel transfer channel on the reactor water pool side, and between the external pressure plate support and the external structure of the fuel transfer channel on the spent fuel pool side.

[0017] Furthermore, the surfaces of the fuel transfer channel on the reactor water pool side and the fuel transfer channel on the spent fuel pool side are covered with stainless steel, and the two inner pressure plate supports are welded to the fuel transfer channel on the reactor water pool side and the fuel transfer channel on the spent fuel pool side, respectively.

[0018] Furthermore, the surfaces of the external buildings of the fuel transfer channel on the reactor water pool side and the external buildings of the fuel transfer channel on the spent fuel pool side are covered with stainless steel, and the two external pressure plate supports are respectively welded to the external structures of the fuel transfer channel on the reactor water pool side and the external structures of the fuel transfer channel on the spent fuel pool side.

[0019] The present invention provides a beneficial effect in that the flexible connection device for the fuel transfer channel of a pool-type heating reactor provided herein can ensure connectivity of the fuel transfer channel and prevent rupture of the fuel transfer channel due to misaligned deformation of the reactor water pool and spent fuel pool by providing an inner sealing ring, an inner pressure plate, an inner pressure plate support, an outer sealing ring, an outer pressure plate, an outer pressure plate support, a leak detector, and a water collection pipe. The inner and outer sealing rings of the device provided herein are both made of rubber and employ a corrugated telescopic structure, which can adapt to misaligned deformation of the reactor water pool and spent fuel pool, thereby preventing rupture of the fuel transfer channel. The inner and outer sealing rings form a double-pass seal, so that if the inner sealing ring is damaged, the outer sealing ring can still prevent pool water from leaking into the surrounding environment. Furthermore, the outer sealing ring of the device provided herein is equipped with a leak detector for detecting leaking pool water. If pool water leaks from the inner sealing ring, an alarm signal is promptly issued. Furthermore, the outer sealing ring is equipped with a water collection pipe to collect and direct leaked pool water to a designated area. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a flexible connection device for a fuel transfer channel of a pool-type heating reactor provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the enlarged structure of location I in the device provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the enlarged structure of point II in the device provided in an embodiment of the present invention;

[0023] Figure 4 AA cross-sectional view of the device provided in an embodiment of the present invention;

[0024] Among them, 11 is an inner sealing ring; 12 is an inner pressure plate; 13 is an inner pressure plate support; 14 is an outer sealing ring; 15 is an outer pressure plate; 16 is an outer pressure plate support; 17 is a leakage detector; 18 is a water collecting pipe. DETAILED DESCRIPTION

[0025] To make the above-mentioned purposes, features, and advantages of the present invention more clearly understood, the technical solutions of the present invention are further clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1-4As shown, an embodiment of the present invention provides a flexible connection device for a fuel transfer channel of a pool-type heating reactor, comprising an inner sealing ring 11, an inner pressure plate 12, an inner pressure plate support 13, an outer sealing ring 14, an outer pressure plate 15, and an outer pressure plate support 16;

[0027] In this embodiment, the inner pressure plate 12 is fixedly connected to the inner pressure plate support 13, and the two inner pressure plate supports 13 are respectively fixedly connected to the fuel transfer channel on the reactor water pool side and the fuel transfer channel on the spent fuel pool side. The two ends of the inner sealing ring 11 are respectively fixedly sealed between the inner pressure plate support 13 and the fuel transfer channel on the reactor water pool side and between the inner pressure plate support 13 and the fuel transfer channel on the spent fuel pool side through the inner pressure plate 12.

[0028] The external pressure plate 15 is fixedly connected to the external pressure plate support 16. The two external pressure plate supports 16 are respectively fixedly connected to the external structure of the fuel transfer channel on the reactor water pool side and the external structure of the fuel transfer channel on the spent fuel pool side. The two ends of the external sealing ring 14 are respectively fixedly sealed between the external pressure plate support 16 and the external structure of the fuel transfer channel on the reactor water pool side and between the external pressure plate support 16 and the external structure of the fuel transfer channel on the spent fuel pool side through the external pressure plate 15.

[0029] Among them, the inner sealing ring 11 is used in conjunction with the inner pressure plate 12 and the inner pressure plate support 13 to form a sealed connection between the fuel transfer channel on the reactor water pool side and the fuel transfer channel on the spent fuel pool side, thereby ensuring the connectivity of the fuel transfer channels; the outer sealing ring 14 is used in conjunction with the outer pressure plate 15 and the outer pressure plate support 16 to form a second seal between the external structures of the fuel transfer channel on the reactor water pool side and the external structures of the fuel transfer channel on the spent fuel pool side, thereby ensuring that even if the inner sealing ring 11 is damaged, the outer sealing ring 14 can still prevent the pool water from leaking into the surrounding environment.

[0030] In this embodiment, the device also includes a water collection pipe 18, which is installed at the bottom of the outer sealing ring 14; if the inner sealing ring 11 is damaged, the water collection pipe 18 is used to collect the pool water leaked from the inner sealing ring 11 and guide the leaked pool water to a designated area.

[0031] Optionally, the device further comprises a leakage detector 17 , which is mounted on the outer sealing ring 14 and is used to detect pool water leaking from the inner sealing ring 11 and issue an alarm signal.

[0032] Optionally, the inner sealing ring 11 is made of a flexible material such as rubber, which can adapt to the deformation inconsistency between the reactor water pool and the spent fuel pool, ensure the connectivity of the fuel transfer channel, and avoid pool water leakage.

[0033] Optionally, the inner sealing ring 11 is a bellows expansion and contraction structure. When the water in the reactor water pool heats up, the bellows expansion and contraction structure of the inner sealing ring 11 can be adaptively expanded and deformed to avoid rupture of the fuel transfer channel caused by uncoordinated deformation of the reactor water pool and the spent fuel pool.

[0034] Optionally, the inner pressure plate 12 is fixedly connected to the inner pressure plate support 13 by bolts; through the inner pressure plate 12 and the bolts, the two ends of the inner sealing ring 11 can be fixedly sealed between the inner pressure plate support 13 and the fuel transfer channel on the reactor water pool side, and between the inner pressure plate support 13 and the fuel transfer channel on the spent fuel pool side.

[0035] Optionally, the surfaces of the fuel transfer channel on the reactor water pool side and the fuel transfer channel on the spent fuel pool side are both covered with stainless steel, and the two inner pressure plate supports 13 are sealed and fixed on the fuel transfer channel on the reactor water pool side and the fuel transfer channel on the spent fuel pool side by welding.

[0036] Optionally, the outer sealing ring 14 is made of flexible materials such as rubber, which can adapt to the inharmonious deformation of the reactor water pool and the spent fuel pool. The outer sealing ring 14 and the inner sealing ring 11 form a double-channel sealing structure. If the inner sealing ring 11 is damaged, the outer sealing ring 14 can still ensure that the pool water does not leak into the surrounding environment.

[0037] Optionally, the outer sealing ring 14 is a bellows expansion and contraction structure. When the water in the reactor water pool heats up, the bellows expansion and contraction structure of the outer sealing ring 14 can be adaptively expanded and deformed to avoid rupture of the fuel transfer channel caused by uncoordinated deformation of the reactor water pool and the spent fuel pool.

[0038] Optionally, the outer pressure plate 15 is fixedly connected to the outer pressure plate support 16 by bolts; through the outer pressure plate 15 and the bolts, the two ends of the outer sealing ring 14 can be fixedly sealed between the outer pressure plate support 16 and the external structure of the fuel transfer channel on the reactor water pool side, and between the outer pressure plate support 16 and the external structure of the fuel transfer channel on the spent fuel pool side.

[0039] Optionally, the surfaces of the external structures of the fuel transfer channel on the reactor water pool side and the external structures of the fuel transfer channel on the spent fuel pool side are covered with stainless steel, and the two external pressure plate supports 16 are sealed and fixed on the external structures of the fuel transfer channel on the reactor water pool side and the external structures of the fuel transfer channel on the spent fuel pool side by welding.

[0040] The surfaces of the reactor water pool fuel transfer channel, the spent fuel pool fuel transfer channel, the reactor water pool fuel transfer channel external structure, and the spent fuel pool fuel transfer channel external structure are all coated with stainless steel. This not only facilitates the welding and sealing of the inner pressure plate support 13 and the outer pressure plate support 16, but also facilitates regular cleaning and maintenance of the device. Furthermore, the stainless steel surfaces of the reactor water pool fuel transfer channel, the spent fuel pool fuel transfer channel, the reactor water pool fuel transfer channel external structure, and the spent fuel pool fuel transfer channel external structure prevent radioactive pool water from leaking into the reactor water pool fuel transfer channel external structure and the spent fuel pool fuel transfer channel external structure.

[0041] An embodiment of the present invention provides a flexible connection device for a fuel transfer channel of a pool-type heating reactor, which includes an inner sealing ring 11, an inner pressure plate 12, an inner pressure plate support 13, an outer sealing ring 14, an outer pressure plate 15, an outer pressure plate support 16, a leakage detector 17 and a water collecting pipe 18; wherein, the inner sealing ring 11 is used to connect the fuel transfer channel on the reactor water pool side and the fuel transfer channel on the spent fuel pool side, ensuring the connectivity of the fuel transfer channels; the inner sealing ring 11 and the outer sealing ring 14 are both made of rubber or other flexible materials, and adopt a corrugated telescopic structure, which can adapt to the inharmonious deformation of the reactor water pool and the spent fuel pool, and can avoid rupture of the fuel transfer channel; the inner sealing ring 11 and the outer sealing ring 14 form a double-channel seal. If the inner sealing ring 11 is damaged, the outer sealing ring 14 can still ensure that the pool water does not leak into the surrounding environment. At the same time, a leakage detector 17 for detecting leaking pool water is installed on the outer sealing ring 14. Once the pool water leaks from the inner sealing ring 11, an alarm signal can be issued in time; moreover, a water collecting pipe 18 is installed on the outer sealing ring 14 to collect the leaked pool water and guide it to a designated area.

[0042] The above embodiments are merely illustrative of the structure, installation, and use of the device of the present invention. Those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, the present invention is intended to include such modifications and variations as long as they fall within the scope of the claims and their equivalents.

Claims

1. A flexible connection device for a fuel transfer channel of a pool-type heating reactor, characterized in that: It includes an inner sealing ring, an inner pressure plate, an inner pressure plate support, an outer sealing ring, an outer pressure plate, and an outer pressure plate support, wherein: The inner pressure plate is fixedly connected to the inner pressure plate support, and the two inner pressure plate supports are respectively fixed on the fuel transfer channel on the reactor water pool side and the fuel transfer channel on the spent fuel pool side; the two ends of the inner sealing ring are respectively fixedly sealed between the inner pressure plate support and the fuel transfer channel on the reactor water pool side and between the inner pressure plate support and the fuel transfer channel on the spent fuel pool side through the inner pressure plate; The outer pressure plate is fixedly connected to the outer pressure plate support, and the two outer pressure plate supports are respectively fixed on the external structure of the fuel transfer channel on the reactor water pool side and the external structure of the fuel transfer channel on the spent fuel pool side; the two ends of the outer sealing ring are respectively fixedly sealed between the outer pressure plate support and the external structure of the fuel transfer channel on the reactor water pool side and between the outer pressure plate support and the external structure of the fuel transfer channel on the spent fuel pool side through the outer pressure plate; The inner sealing ring and the outer sealing ring are both made of rubber; The inner sealing ring is a bellows telescopic structure, and the outer sealing ring is a bellows telescopic structure.

2. A flexible connection device for a fuel transfer channel of a pool-type heating reactor according to claim 1, characterized in that: The device further comprises a water collecting pipe, which is installed at the bottom of the outer sealing ring.

3. A flexible connection device for a fuel transfer channel of a pool-type heating reactor according to claim 1, characterized in that: The device further comprises a leakage detector mounted on the outer sealing ring.

4. A flexible connection device for a fuel transfer channel of a pool-type heating reactor according to claim 1, characterized in that: The inner pressure plate is fixedly connected to the inner pressure plate support by bolts; Through the inner pressure plate and bolts, the two ends of the inner sealing ring are respectively fixed and sealed between the inner pressure plate support and the fuel transfer channel on the reactor water pool side, and between the inner pressure plate support and the fuel transfer channel on the spent fuel pool side.

5. A flexible connection device for a fuel transfer channel of a pool-type heating reactor according to claim 4, characterized in that: The outer pressure plate is fixedly connected to the outer pressure plate support by bolts; Through the external pressure plate and bolts, the two ends of the external sealing ring are respectively fixed and sealed between the external pressure plate support and the external structure of the fuel transfer channel on the reactor water pool side, and between the external pressure plate support and the external structure of the fuel transfer channel on the spent fuel pool side.

6. A flexible connection device for a fuel transfer channel of a pool-type heating reactor according to claim 4, characterized in that: The surfaces of the fuel transfer channel on the reactor water pool side and the fuel transfer channel on the spent fuel pool side are both covered with stainless steel, and the two inner pressure plate supports are respectively welded to the fuel transfer channel on the reactor water pool side and the fuel transfer channel on the spent fuel pool side.

7. A flexible connection device for a fuel transfer channel of a pool-type heating reactor according to claim 4, characterized in that: The surfaces of the external buildings of the fuel transfer channel on the reactor water pool side and the external buildings of the fuel transfer channel on the spent fuel pool side are covered with stainless steel, and the two external pressure plate supports are respectively welded to the external structures of the fuel transfer channel on the reactor water pool side and the external structures of the fuel transfer channel on the spent fuel pool side.

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