A dock for fuel handling of a nuclear powered ship

Abstract

The present application belongs to the field of nuclear power ship design, and particularly relates to a dock for fuel loading and unloading of a nuclear power ship. The dock comprises a dock body and a fuel plant. The dock body is internally provided with a dock pier. The fuel plant is arranged on one side of the dock body and is divided into an upper part and a lower part by a working platform. The upper part is a hoisting working area, and the lower part is a spent fuel operation area, a new fuel operation area and a spent fuel sending area. The present application has the following advantages: 1) compared with the prior art, the fuel loading and unloading efficiency of the nuclear power ship is greatly improved; 2) compared with the prior art, the hoisting operation of a hundred tons of loading and unloading box bodies is avoided, the operation safety is improved, and the energy consumption of the loading and unloading operation is reduced; 3) the hoisting operation is avoided, and the loading and unloading operation can be carried out in bad weather; and 4) the dock crane device is not occupied, and the ship can carry out other maintenance operations in the dock while the loading and unloading operation is carried out.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of nuclear power ship design, and particularly relates to a nuclear power ship fuel loading dock. BACKGROUND

[0002] The current nuclear power ship fuel loading method is mainly carried out in a dock. Since the refueling process may release radioactive substances, the current design idea usually adopts a fuel loading box. For example, patent ZL202122504187.7 discloses an intermediate shielding box body, which is used to complete loading and unloading through hoisting operation. A nuclear power ship reactor usually needs to replace hundreds of fuel assemblies at a time. The use of a fuel loading box for loading and unloading usually requires dozens of hoisting operations, which is very long and complicated, and the hoisting operation is of high risk.

[0003] The fuel loading operation of a land-based nuclear facility is usually carried out in adjacent and connectable plant buildings, which is of high safety and operation convenience. If the land-based nuclear fuel loading method can be combined with a nuclear power ship, the fuel loading efficiency can be effectively improved, and the operation cost and risk can be reduced. SUMMARY

[0004] The purpose of the present application is to provide a nuclear power ship fuel loading dock, which can serve the nuclear fuel loading operation of a nuclear power ship and can have an operable and safe fuel loading method.

[0005] The technical solution of the present application is as follows: a nuclear power ship fuel loading dock, comprising a dock body and a fuel plant;

[0006] The dock body is provided with a dock pier for parking a ship that needs to be repaired or needs to load or unload nuclear fuel;

[0007] The fuel plant is provided on one side of the dock body and is divided into an upper part and a lower part by an operation platform, the upper part is a hoisting operation area, and the lower part is a spent fuel operation area, a new fuel operation area, and a spent fuel sending area;

[0008] The hoisting operation area is provided with a movable box body, the top of which is fixed with a telescopic hanger, the bottom of which is welded with a first derrick car track, and the top of the movable box body is fixed with a fixed hanger; the bottom of the hanger is welded with a second derrick car track;

[0009] The spent fuel operation area is provided with a spent fuel pool, a damaged fuel assembly storage room, a spent fuel inspection device, and a fuel transfer cabin;

[0010] The new fuel operation area is provided with a new fuel storage rack, a new fuel inspection room, and a new fuel receiving room;

[0011] The spent fuel sending area is provided with a container loading well, a container preparation well and a fuel receiving and sending room.

[0012] The movable box is a semi-closed cuboid structure.

[0013] The movable box is a semi-closed cuboid structure welded by five radiation-shieldable metal material walls.

[0014] The movable box is provided with an opening at the bottom.

[0015] A cover plate is installed on the opening.

[0016] A plurality of spent fuel storage racks are installed at the bottom of the spent fuel pool.

[0017] A human bridge crane is arranged on the first derrick car track.

[0018] An auxiliary crane is arranged on the second derrick car track.

[0019] The beneficial effects of the present application are as follows: 1) compared with the prior art, the fuel loading and unloading efficiency of the nuclear power ship is greatly improved.

[0020] 2) compared with the prior art, the operation of lifting and transporting the hundreds of tons of loading and unloading boxes is avoided, the operation safety is improved, and the energy consumption of the loading and unloading operation is reduced.

[0021] 3) avoiding lifting and transporting operation, it can not be affected by the weather, and any loading and unloading operation can be carried out in bad weather.

[0022] 4) it does not occupy the dock crane equipment, and the ship can carry out other maintenance and maintenance operations in the dock at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A nuclear power ship fuel loading and unloading dock section view is provided.

[0024] Figure 2 A fuel plant plan view is provided.

[0025] Figure 3 A ship entering the dock view is provided.

[0026] Figure 4 A loading and unloading operation process view is provided.

[0027] Figure 01: Dock proper, 02: Fuel plant, 03: Working platform, 04: Hoisting area, 05: Spent fuel handling area, 06: New fuel handling area, 07: Spent fuel delivery area, 08: Removable container, 09: Retractable hanger, A10: First gantry track, 11: Fixed hanger, B12: Second gantry track, 13: Cover plate, 14: Man-bridge crane, 15: Auxiliary crane, 16: Spent fuel pool, 17: Damaged fuel assembly storage room, 18: Spent fuel inspection device, 19: Fuel transfer compartment, 20: Spent fuel storage rack, 21: New fuel storage rack, 22: New fuel inspection room, 23: New fuel receiving room, 24: Container loading well, 25: Container preparation well, 26: Fuel delivery and receiving room, 27: Transfer pipe. 28: Dry dock, 29: Reactor compartment top deck, 30: Through hole, 31: Refueling channel, 32: Reactor compartment, 33: Reactor pressure vessel. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 As shown, a dock for loading and unloading fuel for nuclear-powered ships includes a dock body 01 and a fuel plant 02;

[0030] The dock body 01 is provided with a dock pier for stopping ships that need maintenance or need to load and unload nuclear fuel;

[0031] The fuel plant 02 is located on one side of the dock body 01 and is divided into two parts by the operating platform 03. The upper part is the lifting operation area 04, and the lower part is composed of the spent fuel operation area 05, the new fuel operation area 06, and the spent fuel sending area 07.

[0032] The lifting operation area 04 is provided with a movable box 08, a retractable hanger 09 is fixed on the top, and a first gantry track A10 is welded to the bottom of the hanger.

[0033] The movable box 08 is a semi-enclosed rectangular structure formed by welding five metal walls of sufficient thickness that can shield radiation. It is not connected to the fuel plant 02 but remains airtight. A fixed hanger 11 is fixed to the top of the movable box 08; a second gantry track B12 is welded to the bottom of the hanger; an opening is provided at the bottom of the movable box 08, and a cover plate 13 is installed at the opening.

[0034] A man-bridge crane 14 is installed on the first gantry track A10;

[0035] An auxiliary crane 15 is installed on the second gantry track B12;

[0036] The spent fuel operation area 05 is provided with a spent fuel pool 16, a damaged fuel assembly storage chamber 17, a spent fuel inspection device 18, and a fuel transfer cabin 19;

[0037] A plurality of spent fuel storage racks 20 are installed at the bottom of the spent fuel pool 16;

[0038] The new fuel operation area 06 is provided with a new fuel storage rack 21, a new fuel inspection room 22, and a new fuel receiving room 23;

[0039] The spent fuel sending area 07 is provided with a container loading well 24, a container preparation well 25, and a fuel receiving and sending room 26; the container loading well 24 is connected with the spent fuel operation area 05 through a transmission pipe 27.

[0040] The operation steps of the present application are as follows:

[0041] S1: A plurality of dock blocks 28 are arranged at the bottom of the dock body 01;

[0042] S2: After the target ship enters the dock body 01, the water in the dock is drained, and the ship is placed horizontally on the dock blocks 28, so that the top deck 29 of the ship reactor cabin is substantially horizontal with the operation platform 03;

[0043] S3: The outer plate of the ship is cut, or the cabin door (if any) is opened, to form a through hole 30 for the movable box 08 to enter and exit;

[0044] S4: The movable box 08 is moved to the top deck 29 of the reactor cabin, and the cover plate 13 can cover the refueling passage 31;

[0045] S5: The cover plate 13 is opened, so that the reactor cabin 32 is connected with the fuel factory 02;

[0046] S6: The telescopic hanger 09 is extended, so that the first crane rail A10 is connected with the second crane rail B12;

[0047] S7: The spent fuel is lifted by the auxiliary crane and the man-bridge crane to the spent fuel pool 16, and is inspected in the spent fuel inspection device 18, and is stored in the damaged fuel storage and the damaged fuel storage chamber 17, and is stored in the intact fuel assembly storage and the spent fuel storage rack 20;

[0048] S8: After the unloading is completed, the new fuel is lifted from the new fuel storage rack 21 to the reactor pressure vessel 33 to complete the loading;

[0049] S9: After the loading and unloading are completed, the cover plate 13 is closed, and the telescopic hanger 09 is retracted, and the movable box 08 is retracted to the lifting operation area.

[0050] The above is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any equivalent changes and modifications made in the shape, structure, features and spirit of the present application within the scope of the claims of the present application shall be included in the scope of the claims of the present application.

Claims

1. A dock for the fuel handling of a nuclear powered ship, characterised in that: The dock body is provided with a dock pier for parking a ship which needs to be repaired or needs to load or unload nuclear fuel. The dock body is provided with a dock pier for parking a ship which needs to be repaired or needs to load or unload nuclear fuel. The fuel factory is divided into two parts by an operation platform, and the upper part is a hoisting operation area, and the lower part is a spent fuel operation area, a new fuel operation area and a spent fuel sending area. The movable box is provided with a telescopic hanger fixed on the top, and a first derrick car track is welded on the bottom of the hanger. The second derrick car track is welded on the bottom of the hanger. The spent fuel operation area is provided with a spent fuel pool, a damaged fuel assembly storage room, a spent fuel inspection device and a fuel transfer cabin. The new fuel operation area is provided with a new fuel storage rack, a new fuel inspection room and a new fuel receiving room.

2. A nuclear powered ship fuel handling dock as claimed in claim 1, characterised in that: The spent fuel sending area is provided with a container loading well, a container preparation well and a fuel receiving and sending room.

3. A nuclear powered ship fuel handling dock as claimed in claim 2, characterised in that: The movable box is a semi-closed cuboid structure.

4. A nuclear powered ship fuel handling dock as claimed in claim 1 wherein: The movable box is a semi-closed cuboid structure welded by five radiation-shieldable metal material walls.

5. A nuclear powered ship fuel handling dock as claimed in claim 4, characterised in that: The bottom of the movable box is provided with an opening.

6. A nuclear powered ship fuel handling dock as claimed in claim 1 wherein: A cover plate is installed on the opening.

7. A nuclear powered ship fuel handling dock as claimed in claim 1 wherein: A plurality of spent fuel storage racks are installed on the bottom of the spent fuel pool.

8. A nuclear powered ship fuel handling dock as claimed in claim 1 characterised in that: A man-bridge crane is arranged on the first derrick car track. An auxiliary crane is arranged on the second derrick car track.

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