JPS6283697A - Nulcear reactor plant for multipurpose utilization - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field to which the invention pertains]

The present invention relates to the configuration of a nuclear reactor plant for experimental and commercial high-temperature gas reactors aimed at the multipurpose use of nuclear heat.

[Prior art and its problems]

Development of a floating support type reactor plant as shown in Figure 3 or a side-by-side type reactor plant as shown in Figure 4 is currently underway in Japan as a reactor plant for an experimental high-temperature gas reactor aimed at the multi-purpose use of nuclear heat. There is. In each figure, 1
is a reactor building, 2 is a reactor vessel of a high-temperature gas reactor installed in the building, 3 is a heat exchanger as a pressurized water cooler, 4 is an intermediate heat exchanger that extracts the nuclear heat generated by the reactor to the utilization system, 5
is the reactor primary coolant piping that connects the reactor vessel 2 and each type of heat exchanger 3, 4 described above. The purpose of this multi-purpose experimental high-temperature gas reactor is to conduct various experiments related to the use of nuclear heat for process heat, and depending on the purpose of the experiment, the heat exchanger may be a helium-helium intermediate heat exchanger or a helium-helium intermediate heat exchanger. , yM air generator, pressurized water cooler, steam number Ijin, and other types of heat exchangers are desirable. - However, in the nuclear reactors and plants of each type shown in Figures 3 and 4 above, when replacing the existing heat exchanger with a different type of heat exchanger due to a change in experimental use, it is necessary to Furnace vessel 2
After cutting the piping 5 that connects the existing heat exchanger and the existing heat exchanger, the existing heat exchanger is removed, and a new type of heat exchanger is installed there, and then the heat exchanger is removed. This requires work such as re-welding and joining between the exchanger and the piping, which requires a long period of time and a great deal of effort to replace the heat exchanger. The problem is the same in commercial high-temperature gas reactor plants. Various types of heat exchangers, such as steam generators, intermediate heat exchangers, and steam reformers, are connected and used depending on the purpose of nuclear heat utilization of the plant. This is a major issue in promoting standardization of nuclear reactor plants.

[Purpose of the Invention] This invention has been made in consideration of the above points, and eliminates the complexity of replacement work when replacing heat exchangers in conventional nuclear reactor plants, and replaces and replaces heat exchangers. The purpose of the present invention is to provide a nuclear reactor plant configuration that facilitates work and is advantageous in advancing the standardization of this type of nuclear reactor plant.

[Key points of the invention]

In order to achieve the above object, this invention has been developed to connect a common unit that forms part of a heat exchanger equipped with a primary coolant inlet and outlet to the reactor vessel in advance and fix it in the reactor building. The heat exchanger section is configured according to the purpose of using nuclear heat, and the common part is used as a common part of the heat exchanger. By configuring it so that it can be installed and replaced in combination with the reactor and heat exchanger, it is possible to standardize and manufacture common reactors and heat exchangers, and to add various types of heat exchangers used in nuclear heat utilization systems for different purposes. can be easily handled with simple replacement work.

[Embodiments of the invention]

FIG. 1 is an overall configuration diagram of a nuclear reactor plant according to an embodiment of the present invention showing the steps for assembling and exchanging heat exchangers, and FIG. 2 is an example of a heat exchanger adopted in the nuclear reactor plant of FIG. 1. FIG. First, the structure of the heat exchanger 4 will be explained with reference to FIG. In FIG. 2, the outer shell of the heat exchanger 2 is divided into upper, middle, and lower parts, and the upper and lower body shells 6 and 7 are interconnected. It consists of a common 8" in the middle position, and the winter 6 and 7.8 are airtight with bolts (not shown) after abutting the connecting flanges formed on the end faces of the winter 6 and 7.8. On the other hand, the common pipe 8 of the winter pipes is equipped with an inlet pipe 9 and an outlet pipe 10, which serve as introduction and discharge channels for the reactor primary coolant. The upper shell 6 constituting the is equipped with a circulator 11 for primary coolant, and the lower shell 7 is equipped with an inlet 12 for a secondary heat exchange gas using, for example, helium as a heat medium.
An outlet 13, a group of heat transfer tubes 14 piped in the shell spanning between the inlet and the outlet, partitioning a waste flow path of the primary coolant connected in communication with the pipe end of the primary coolant inlet pipe 9. Inner body 1
Equipped with 5th grade. Note that 16 is a connection box that connects to the primary coolant circulation machine 11, and 17 is a connection pipe that connects the connection box 16 and the outer peripheral space of the inner shell 15. As shown in FIG. 1 (al), the common use 8 mentioned above has been fixedly installed in advance in the reactor building 1, and the pipe 5 is connected between it and the reactor vessel 2 in brackets.
Piping is connected via. Note that the reference numeral 18 in the figure is a support member that fixes the common use 8 to the building side. This figure 1 (al shows the shared equipment of the nuclear reactor plant that has been standardized and manufactured to correspond to heat exchangers for various uses. On the other hand, figure 1 fbl shows the tal
The assembled state of the heat exchanger 4 in which the body shell of the heat exchanger tA shown in FIG. 2 is connected to the common use 8 in the equipment of In addition, the assembled state of the steam generator 40 in which the main body shell of a heat exchanger for steam generation, for example, for a heat exchanger for a different purpose than the heat exchanger in FIG. Next, we will explain the procedure for assembling and replacing the heat exchanger with reference to Fig. 1. First, as shown in Fig. 1 fa +
When installing the heat exchanger 4 shown in FIG. 2 for shared equipment, the heat exchanger tube group 14. Inside m15, connecting pipe 17, etc. inside ii! The lower shell 7 of the equipped main body shell is connected and coupled to the lower surface side of the common FI 8, and then the upper shell 6 of the 0th order is connected in communication between the inner shell 15 and the primary coolant inlet pipe 9. It is connected to the upper surface of the I cylinder 8, and then the primary coolant circulation machine 1 is connected to the cylinder 6.
The installation of the heat exchanger 4 is completed when the heat exchanger 4 is installed, and then the secondary side of the heat exchanger 4 is connected to the nuclear heat utilization system. To replace the heat exchanger for steam generation with a different type shown in , first, reverse the assembly procedure of the heat exchanger 4 described above and assemble the heat exchanger 4.
After removing the main body shell 6.7 of the heat exchanger 40, the main body shell of another heat exchanger 40 may be connected to the common circle 8 in the same manner as described above. As an applied embodiment of the present invention, for heat exchangers of various types whose outer shell portions can be shared, heat exchanger tube group 14. in FIG. 2 is used. It is also possible to carry out the method by replacing only the internal structure of the heat exchanger such as the inner shell 15.

【Effect of the invention】

As described above, according to the present invention, the common circle forming a part of the heat exchanger equipped with the inlet and outlet for the reactor primary coolant is connected to the reactor vessel by piping in advance, and fixedly installed inside the reactor building. A heat exchanger is installed for each use, and the common circle is used as a common part of the heat exchanger, each configured according to the purpose of using nuclear heat. By configuring the main body body equipped with accessory equipment, etc. to be installed and replaced in combination with the common circle, the common circle that forms part of the heat exchanger can be used for intermediate heat exchangers, steam generators, pressurized water cooling, etc. The installation and replacement of various types of heat exchangers, such as N-air reformers and N-air reformers, can be done without having to go through the troublesome work of cutting and re-welding the connecting piping to the reactor each time, as required in the past. It's easy to carry out. Further, even if it becomes necessary to disassemble or repair the heat exchanger, the main body portion of the heat exchanger can be easily attached and detached using the same procedure. Furthermore, as mentioned above, the heat exchanger can be assembled by making the common circle of the heat exchanger a common part and matching the body shell of each type of heat exchanger to this, so it can be used not only for experimental nuclear reactors but also for multipurpose use. Even in commercial nuclear reactor plants, it will have a great effect on promoting the standardization of nuclear reactor plants, such as making it possible to standardize the common circle of reactors and heat exchangers for various types of heat exchangers with different uses. can demonstrate.

[Brief explanation of drawings]

Figures 1 (far to fc) are block diagrams of a nuclear reactor plant according to an embodiment of the present invention showing procedures for installing and replacing various types of heat exchangers, and Figure 2 is a diagram showing the steps for installing and replacing various types of heat exchangers. Figures 3 and 4 are cross-sectional views of an example of a heat exchanger, respectively, in Figure 0, which is a layout diagram of a conventional nuclear reactor plant, where l: reactor l! shop, 2: reactor vessel, 4
, 40: Various types of heat exchangers, 5: Connection piping between the nuclear reactor and the heat exchanger, 6.7: Body shell of the heat exchanger, 8: Common circle, 9. to: reactor primary coolant inlet and outlet pipe, 11
; Coolant circulation machine; 14: Heat transfer tube group through which the secondary heating medium flows; 15: Inner shell. Figure 1

Claims (1)

[Scope of Claims] 1) A nuclear reactor plant that utilizes nuclear heat for multiple purposes by connecting various types of heat exchangers to a nuclear reactor, the heat exchanger being equipped with an inlet and an outlet for a reactor primary coolant. The common shell, which forms part of the heat exchanger, is connected in advance to the reactor vessel by piping and is fixedly installed inside the reactor building, and the common shell is configured as a shared part of the heat exchanger according to the purpose of using nuclear heat. 1. A nuclear reactor plant for multi-purpose use, characterized in that a main body shell equipped with heat exchange parts, auxiliary equipment, etc. for each purpose is installed and replaced in combination with the common shell. 2) A nuclear reactor plant for multi-purpose use as claimed in claim 1, characterized in that the common shell of the heat exchanger is provided with a connection flange for coupling to the main body shell.