CN114023474A - Heavy water reactor spent fuel dry-type storage structure - Google Patents
Heavy water reactor spent fuel dry-type storage structure Download PDFInfo
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- CN114023474A CN114023474A CN202111389607.XA CN202111389607A CN114023474A CN 114023474 A CN114023474 A CN 114023474A CN 202111389607 A CN202111389607 A CN 202111389607A CN 114023474 A CN114023474 A CN 114023474A
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- storage
- storage container
- spent fuel
- water reactor
- heavy water
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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
- G21C19/06—Magazines for holding fuel elements or control elements
- G21C19/07—Storage racks; Storage pools
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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
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- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The disclosure belongs to the technical field of nuclear power, and particularly relates to a heavy water reactor spent fuel dry-type storage structure. In the disclosure, a cavity is arranged in a storage module for storing spent fuel, and a top plate of the cavity is provided with a plurality of through holes along the axial direction; each storage container is of a cylindrical structure with an open top end, each storage container is inserted into one through hole, and the bottom end of each storage container is fixedly connected to the bottom plate of the cavity; a plurality of fuel baskets are arranged in each storage container, and each fuel basket is used for placing spent fuel; each shield plug fits within an opening at the top end of a storage container, thereby closing the storage container. The supporting manner of the storage containers is changed from the top supporting of the storage module to the bottom supporting of the storage module by fixedly connecting the bottom end of each storage container to the bottom of the chamber. The requirements of dense storage of the spent fuel and the requirement of seismic resistance are met.
Description
Technical Field
The invention belongs to the technical field of nuclear power, and particularly relates to a heavy water reactor spent fuel dry-type storage structure.
Background
The third nuclear power plant in Qinshan is a CANDU-6 model heavy water reactor type, spent fuel is stored in a dry storage module in a plant area in a centralized manner, and at present, 6 QM-400 storage modules for commissioning and transportation are built in three batches. To increase the storage capacity of the modules, M1 type dense storage modules were developed. The storage vessels of each M1 type storage module were increased from the 4 x 10 arrangement of the QM-400 type to a 5 x 28 arrangement, with the pitch of each storage vessel decreasing in both the length and width directions of the module. However, the weight of the densified storage container and the weight of the fuel basket cannot be supported by the top plate of the storage module, and therefore, how to store the densified storage container and the densified fuel basket in a suitable manner is a problem to be solved.
Disclosure of Invention
In order to overcome the problems in the related art, a dry storage structure for the spent fuel of the heavy water reactor is provided.
According to an aspect of an embodiment of the present disclosure, there is provided a heavy water reactor spent fuel dry storage structure, a support structure of the heavy water reactor spent fuel dry storage container including: a plurality of storage containers, a plurality of fuel baskets, and a plurality of shield plugs, each storage container and each shield plug capable of shielding radiation;
a cavity is arranged in the storage module for storing the spent fuel, and a top plate of the cavity is provided with a plurality of through holes along the axial direction;
each storage container is of a cylindrical structure with an open top end, each storage container is inserted into one through hole, and the bottom end of each storage container is fixedly connected to the bottom plate of the cavity;
a plurality of fuel baskets are arranged in each storage container, and each fuel basket is used for placing spent fuel;
each shield plug fits within an opening at the top end of a storage container, thereby closing the storage container.
In one possible embodiment, each storage container has a step extending radially inward at a position on the inner wall of the storage container close to the upper opening of the storage container, and the bottom end of the shield plug inserted into the storage container is pressed against the step.
In one possible implementation, the top end opening edge of each storage container has a first boss extending radially outward, and the top end edge of each shield plug has a second boss extending radially outward;
the second boss of each shield plug presses against the first boss of the plugged storage container.
In one possible implementation manner, the heavy water reactor spent fuel dry-type storage structure further comprises a plurality of anchor bolts;
each storage vessel is fixedly connected to the bottom plate of the storage module by a plurality of anchor bolts.
In one possible implementation, the upper end outer wall of each storage container has a gap of a predetermined distance from the inserted through-hole inner wall.
In one possible implementation, the plurality of fuel baskets in each storage vessel are arranged from bottom to top.
In one possible implementation, the plurality of storage containers are arranged in an array.
In one possible implementation, the number of the plurality of storage containers is between 40 and 140.
The beneficial effect of this disclosure lies in: in the present disclosure, the bottom end of each storage container is fixedly connected to the bottom plate of the chamber, so that the storage container is supported by the top plate of the storage module instead of the bottom plate of the storage module. The requirements of dense storage of the spent fuel and the requirement of seismic resistance are met.
Drawings
Fig. 1 is a schematic diagram illustrating a heavy water reactor spent fuel dry storage structure in accordance with an exemplary embodiment.
In the figure:
1. a shield plug; 2. a gap; 3. a top plate; 4. a fuel basket; 5. a storage vessel; 6. anchor bolts; 7. a base plate.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
Fig. 1 is a schematic diagram illustrating a heavy water reactor spent fuel dry storage structure in accordance with an exemplary embodiment. As shown in fig. 1, the support structure of the dry storage container for heavy water reactor spent fuel may include: the storage containers 5, the fuel baskets 4, and the shield plugs 1 are made of a material capable of shielding radiation, and the storage containers 5 and the shield plugs 1 are made of, for example, carbon steel. The present disclosure does not limit the material of each storage container 5 and each shield plug 1.
In the present disclosure, the storage module may be formed by pouring concrete, for example, and the storage module has a cavity therein, the cavity has a top plate 3 and a bottom plate 7, and the top plate 3 of the cavity is provided with a plurality of through holes along the axial direction.
Each storage container 5 is a cylindrical structure with an open top end, each storage container 5 can be axially inserted into one through hole, and the bottom end of each storage container 5 is fixedly connected to the bottom plate 7 of the chamber.
A plurality of fuel baskets 4 are arranged in each storage container 5, each fuel basket 4 is used for holding spent fuel, and for example, the plurality of fuel baskets 4 in each storage container 5 are arranged from bottom to top.
Each shield plug 1 is fitted into an opening at the top end of a storage container 5, thereby closing the storage container 5.
The present disclosure changes the manner in which the storage containers are supported from the top plate of the storage module to the bottom plate of the storage module by fixedly attaching the bottom end of each storage container to the bottom plate of the chamber so that the top plate does not have to bear the weight of the storage container. The requirements of dense storage of the spent fuel and the requirement of seismic resistance are met.
In one possible implementation, as shown in fig. 1, the inner wall of each storage container 5 has a step portion extending radially inward at a position close to the upper opening of the storage container 5, and the bottom end of the shield plug 1 inserted into the storage container 5 is pressed against the step portion. The top end opening edge of each storage container 5 has a first boss portion extending radially outward, the top end edge of each shield plug 1 has a second boss portion extending radially outward, and the second boss portion of each shield plug 1 is pressed against the first boss portion of the plugged storage container 5. In this way, the shield plug 1 is engaged with the stepped portion, and the first projecting portion and the second projecting portion are engaged, whereby the storage container 5 can be sealed more effectively.
In one possible implementation, the heavy water reactor spent fuel dry storage structure further includes a plurality of anchor bolts 6; each storage vessel 5 is fixedly connected to the floor 7 of the storage module by means of a number of anchor bolts 6. For example, a plurality of anchor bolt holes may be axially formed in the bottom end of each storage container 5, and each anchor bolt 6 may be screwed to one anchor bolt hole and the bottom plate 7, thereby fixedly coupling the bottom end of the storage container 5 to the bottom plate 7.
In a possible realization, each storage container 5 has a gap 2 of a preset distance between the upper end outer wall and the inserted through hole inner wall. It is possible to effectively prevent the storage container 5 and the top plate 3 from being damaged due to thermal expansion of the storage container 5.
In one possible implementation, the plurality of storage containers are arranged in an array. The number of the plurality of storage containers is between 40 and 140.
In one example of an application, the following operations may be performed to install the heavy water reactor spent fuel dry storage structure of the present disclosure.
Divide into the multiunit with a plurality of rag bolts 6, every group rag bolt 6's quantity is the same, can be with rag bolt 6 pre-buried on the bottom plate 7 of storing the module. When the storage containers 5 are installed, each storage container 5 is inserted into a foundation bolt hole in the bottom of the storage container 5 and fixed against a set of foundation bolts 6. After the storage container 5 is mounted, the storage module side walls and the storage module top plate 3 are constructed. The fuel basket 4 may be loaded after the storage vessel 5 and storage modules are completed. When loading, the shield plug 1 is first opened from the outer surface of the module top plate 3, and a plurality of fuel baskets 4 are sequentially put into the storage container 5. After the storage container 5 is filled with the fuel basket 4, the shield plug 1 is put in, and the storage container 5 is sealed by welding. The storage vessel 5 is brought into an operating state, i.e. a long-term storage state.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (8)
1. A heavy water reactor spent fuel dry storage structure, wherein the support structure of the heavy water reactor spent fuel dry storage container comprises: a plurality of storage containers, a plurality of fuel baskets, and a plurality of shield plugs, each storage container and each shield plug capable of shielding radiation;
a cavity is arranged in the storage module for storing the spent fuel, and a top plate of the cavity is provided with a plurality of through holes along the axial direction;
each storage container is of a cylindrical structure with an open top end, each storage container is inserted into one through hole, and the bottom end of each storage container is fixedly connected to the bottom plate of the cavity;
a plurality of fuel baskets are arranged in each storage container, and each fuel basket is used for placing spent fuel;
each shield plug fits within an opening at the top end of a storage container, thereby closing the storage container.
2. The dry storage structure for heavy water reactor spent fuel according to claim 1, wherein each storage container inner wall has a step portion extending radially inward at a position near the upper opening of the storage container, and a bottom end of a shield plug inserted into the storage container is pressed against the step portion.
3. The dry heavy water reactor spent fuel storage structure according to claim 1, wherein the top end opening edge of each storage container has a first bulge extending radially outward, and the top end edge of each shield plug has a second bulge extending radially outward;
the second boss of each shield plug presses against the first boss of the plugged storage container.
4. The dry heavy-water reactor spent fuel storage structure according to claim 1, further comprising a plurality of anchor bolts;
each storage vessel is fixedly connected to the bottom plate of the storage module by a plurality of anchor bolts.
5. The dry storage structure of heavy water reactor spent fuel according to claim 1, wherein a gap of a predetermined distance is formed between an outer wall of an upper end of each storage container and an inner wall of the inserted through-hole.
6. The dry storage structure of heavy water reactor spent fuel according to claim 1, wherein the plurality of fuel baskets in each storage vessel are arranged from bottom to top.
7. The dry storage structure of heavy water reactor spent fuel according to claim 1, wherein the plurality of storage vessels are arranged in an array.
8. The dry storage structure of heavy water reactor spent fuel according to claim 1, wherein the number of the plurality of storage containers is between 40 and 140.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111389607.XA CN114023474A (en) | 2021-11-22 | 2021-11-22 | Heavy water reactor spent fuel dry-type storage structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111389607.XA CN114023474A (en) | 2021-11-22 | 2021-11-22 | Heavy water reactor spent fuel dry-type storage structure |
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| Publication Number | Publication Date |
|---|---|
| CN114023474A true CN114023474A (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111389607.XA Pending CN114023474A (en) | 2021-11-22 | 2021-11-22 | Heavy water reactor spent fuel dry-type storage structure |
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| CN (1) | CN114023474A (en) |
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2021
- 2021-11-22 CN CN202111389607.XA patent/CN114023474A/en active Pending
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Address after: Building 25, Qinsan factory, Haiyan County, Jiaxing City, Zhejiang Province Applicant after: CNNC NUCLEAR POWER OPERATION MANAGEMENT Co.,Ltd. Applicant after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Applicant after: THIRD QINSHAN NUCLEAR POWER Co.,Ltd. Address before: Building 25, Qinsan factory, Haiyan County, Jiaxing City, Zhejiang Province Applicant before: CNNC NUCLEAR POWER OPERATION MANAGEMENT Co.,Ltd. Applicant before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. Applicant before: THIRD QINSHAN NUCLEAR POWER Co.,Ltd. |
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