JPH0647898U - Storage container for heating element and its storage - Google Patents

Abstract

(57) [Abstract] [Purpose] For the storage container and storage of the heating element, improve the heat removal efficiency of the heating element and keep it in a reusable state so that it can be stored for a long period of time separated from the living area. . A heating element housed in a container body having a heat pipe is loaded in a storage hole in an inner bottom portion of a storage chamber, and the heating element is cooled by natural convection of air.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a storage container for a heating element and its storage, and particularly, to store a heating element such as a spent fuel which generates heat for a long period of time in a state of being isolated from a living area.

[0002]

[Prior art]

 As a technology for vitrifying the high-level radioactive liquid waste generated in facilities related to nuclear power plants and geologically disposing of the solidified package, the Japanese Utility Model Laid-Open No. 3-125295 "Geological Disposal Structure for Radioactive Waste" is proposed. .

On the other hand, as a technique for storing spent fuel and the like used in a nuclear reactor without reprocessing, Japanese Patent Laid-Open No. 3-273198 “storing spent fuel and radioactive waste” has been proposed. There is.

[0004]

[Problems to be solved by the device]

 However, if the object to be stored is a high heating element such as spent fuel, the former geological disposal technology tends to be insufficient in cooling, and the latter artificial storage technology tends to be less coolable and the site profitability of the facility. There is a problem with it.

The present invention effectively solves the above-mentioned problems, and improves the heat removal efficiency of the heating element, enables long-term storage in a state isolated from the living area, and maintains a reusable state. The purpose is to do.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides the following means. A first means is a container main body for accommodating a heating element such as a spent fuel in a hermetically sealed state, a penetrating state through a wall of the container main body, an absorption section being located inside the container main body, and a heat radiating section being the main body It is used as a storage container for heating elements, which has a heat pipe located outside. A second means is a heating element having a storage chamber surrounded by a radiation shielding wall and having a supply port and an exhaust port, and a storage hole opened at the inner bottom of the storage chamber and loaded with a heating element. It is used as a storage room.

[0007]

[Action]

 In the first means, when the endothermic portion of the heat pipe is heated by the heating element, the heat is transferred to the outside of the container body through the heat pipe, and the heat is radiated from the heat radiating portion to a heat medium in the vicinity of the heat generating element. The heat is removed. In the second means, the heat of the heating element loaded in the storage hole is removed by the air convection in the storage chamber, and the air in the storage chamber is ventilated by the air supply port and the exhaust port.

[0008]

【Example】

 An embodiment of a storage container for a heating element and its storage according to the present invention will be described with reference to FIGS. 1 to 3. In each figure, reference numeral 1 is the surface of the earth, 1a is a radioactive shielding wall (geosphere), 2 is a storage room (access tunnel), 3 is a supply port, 4 is an exhaust tower, 5 is an exhaust port, 6 is a storage hole, and 10 is a storage hole. Is a storage container, 11 is a container body, 12 is a heat pipe, and X is a heating element.

The details will be described below. The storage room (access tunnel) 2 is, for example, one that has been excavated in the stratum 1a, as shown in FIG. 1, and has a plurality of storage holes 6 at the inner bottom thereof. At the same time, the storage chamber 2 is connected to the peripheral position and the air supply port 3 on the ground, and the central position of the storage chamber 2 is connected to the ground exhaust port 5.

As shown in FIGS. 2 and 3, the object to be stored 10 is to be embedded in the storage hole 6 in a loaded state. The container body 11 is made of concrete, and the container body 11 is A heat pipe 12 disposed in a central portion of the container so as to project from the upper indigo 11a, and a partition wall 11b disposed between the inner wall of the container body 11 and the heat pipe 12 so as to partition the internal space into a plurality of compartments. have.

The heating element X is spent fuel in the examples of FIGS. 2 and 3, and is stored in a plurality of spaces partitioned by the partition wall 11b.

The cooling of the heating element X will be described below. When the heating element X is loaded into the space partitioned by the partition wall 11b and is covered with the partition wall 11b, the heat of the heating element X heats the internal air of the container body 11 and a part (heat absorbing part 12a) of the heat pipe 12. Then, the working fluid inside the heat pipe 12 evaporates, and when this vapor flow reaches the heat radiating portion 12b, it is cooled by the internal air in the storage chamber (access tunnel) 2 in FIG. The liquefied working fluid is returned to the lower portion via the wick 12c of the heat pipe 12 as shown by the arrow in FIG. 2, and the circulation that promotes evaporation again at the heat absorbing portion 12a is repeated, whereby the heating element X Cooling is performed.

The air heated to a high temperature by the heat radiation from the storage container 10 rises near the ceiling of the storage chamber (access tunnel) 2, but in FIG. 1, the central portion of the storage chamber (access tunnel) 2 is shown. Since the air in the vicinity has a relatively high temperature, as shown by the arrows, high-temperature air is discharged from the exhaust port 5 via the exhaust tower 4 and low-temperature air is discharged from the air supply port 3. The air is replaced by being taken into the storage room (access tunnel) 2.

[Other Embodiments] In the storage container for a heating element and the storage thereof according to the present invention, the following technique can be adopted instead of one embodiment. a) The heating element should gradually release heat by a chemical reaction. b) The heating element housed in the container body and the number or arrangement of heat pipes projecting from the container body are arbitrary. c) The constituent wall of the container body is made of stainless steel or the like. d) The ceiling of the storage room should have a shape suitable for generating air convection.

[0015]

[Effect of device]

 According to the storage container for the heating element and the storage container thereof according to the present invention, the following effects can be obtained. (1) By using a storage container that has a container body that houses the heating element and a heat pipe that is arranged so as to penetrate the wall of the container body, the heat of the heating element can be efficiently transferred to the outside of the container. As a result, the temperature rise of the heating element can be suppressed and the structure can be simplified. (2) The radiation shielding wall is formed by the stratum by providing a storage room having a storage room having an air supply port and an exhaust port, and a storage hole opened at the inner bottom of the storage room and loaded with a heating element. , Geological disposal and isolation from living areas can be easily implemented. (3) By loading the heating element in the storage hole of the storage chamber, it becomes easy to pull out the heating element, and it is possible to facilitate the reuse.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of a heating element storage according to the present invention.

FIG. 2 is a front sectional view showing an embodiment of a storage container for a heating element according to the present invention.

FIG. 3 is a plan sectional view showing an embodiment of a storage container for a heating element according to the present invention.

[Explanation of symbols]

 1 Surface 1a Radioactive shielding wall (geology) 2 Storage room (access tunnel) 3 Air inlet 4 Exhaust tower 5 Exhaust port 6 Storage hole 10 Storage container 11 Container body 11a Upper indigo 11b Partition wall 12 Heat pipe 12a Heat absorption part 12b Heat dissipation part 12c Wick X heating element

Claims (2)

[Scope of utility model registration request] 1. A container main body for accommodating a heating element such as a spent fuel in a hermetically sealed state, a heat absorbing part located inside the container main body and penetrating through a wall of the container main body, and a heat radiating part outside the container main body. A storage container for a heating element, comprising: a heat pipe located therein. 2. A storage room having an air supply port and an exhaust port surrounded by a radiation shielding wall, and a storage hole opened at an inner bottom portion of the storage room to be loaded with a heating element. Storage of storage container for heating element.