JPS6011195A - Nuclear fusion device - 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 of invention] The present invention relates to improvements in nuclear fusion devices.

[Technical background of the invention]

A conventional example will be explained with reference to FIGS. 1 to 3. 1st
The figure is a schematic configuration diagram of a nuclear fusion device. In the figure, 1 is a cylindrical body, and this cylindrical body 1 has a torus shape, and uses the inner or outer wall as a vacuum wall to serve as a plasma vacuum vessel. I have an empty container for containing plasma 2 fueled by hydrogen (T)'. In addition, a blanket 3 is provided so as to surround the plasma 2, and a tritium breeding material made of ceramic such as Lr 20, for example, is housed inside the shield body J. )

A neutron car of 14 MeV is generated from the plasma 2, and these neutrons multiply hydrogen in three claws and generate neutron heat generation within the blanket 3. Specifically, the air is discharged from the cooling tunnel C2, which flows through the blanket 3 (two cooling channels (not shown)), to the outside (one channel and one channel).

On the other hand, the outer periphery of the shield body 1 (2 is the area where the toroidal coil 4 is provided, and the outside thereof) (2 is provided as close as the voloidal coil of the voloidal coil). In order to improve the performance of 2, the aspect ratio (R/'' tR: major radius of the plasma, a: minor radius of the plasma) is made small, and the coupling between the poloidal coil 5 and the plasma 2 is made good, and the power supply capacity is made small. The plasma 2 is contained by the toroidal coil 4, and the poloidal coil 5 is used to raise and lower the plasma 2, and to control its position and shape. are both formed by superconducting coils (-.
It will be installed at 3.

Generally, the shield 11, blanket 3, heat insulating vacuum vessel 6, etc. need to have a sufficiently high I-turn resistance in the torus direction compared to the plasma 2. This is because when the poloidal coil 5 controls the rise, fall, position, and shape of the plasma 2, the poloidal coil 50 suppressing current is induced in the shield 1, blanket 3, and heat insulating vacuum vessel 6. This is to prevent Therefore, as shown in Fig. 3, the barrier bodies 1 and O-
The insulated vacuum vessel 6 is provided with high resistance bellows 7 and 8, respectively. Due to the resistance bellows 2 and 8, the shield 1 and the heat insulating vacuum container 6 are configured to be able to provide one turn resistance. In addition, the baffle body 1 and the blanket 3 each have a divided portion (an insulating phase 9 made of ceramic or the like), and each insulating phase 9 has a one-turn resistance.

[Problems with background technology]

According to the above formation, the shiyahei body 1 and the insulated vacuum container 6
By providing the bellows 7.8 in that part, both banks of A become thinner, and the specific resistance of the four superconducting bodies of the toroidal coil 4 exceeds the service limit value in a short period of time.In other words, the resistance value of the stabilized copper increases. There is a risk that the limit will be exceeded, and in order to recover from this, annealing is required in a short period of time, which may cause a decrease in the operating rate of the device.

[Purpose of the invention]

The purpose of the present invention is to prevent the situation in which the specific resistance of the superconducting material of the toroidal coil exceeds the usage limit value in a short period of time, thereby improving the operating rate of the device. Our goal is to provide a complete range of highly reliable nuclear fusion devices.

[Invention 0') Overview] In order to achieve the above object, the present invention has a toroidal structure having a bellows in the direction of the torus, which also serves as a plasma vacuum vessel for confining plasma inside, and an internal C2 structure. In a nuclear fusion device formed from a toroidal coil consisting of a superconducting coil provided on the outer periphery of the body, and a homogenized heat vacuum vessel in which a poloidal coil is installed and has a bellows in the torus direction, the bellows of each of the shielding body and the heat insulating vacuum vessel are installed. By installing the bellows so that they are aligned with each other in the torus direction, that is, by installing the bellows at different angles rather than at the same angle, it is possible to ensure a sufficient shielding thickness in the bellows portion (two It is characterized by what it did.

[Embodiments of the invention]

Hereinafter, all 121 pages of the present invention will be explained. FIG. 4 is a four-fold configuration diagram of the nuclear fusion device according to the present invention, and FIG. 5 is a sectional view taken along the line v-■ in FIG.
Parts that are the same as those in Figures 1 to 3 are given the same numbers and their explanations will be omitted, and only the different parts will be described here.

In other words, the bellows 7 provided on the shielding body 1 is placed on the same angle as the toroidal coil 4, and the bellows 7 provided on the shielding body 1 and the bellows 7 provided on the shielding body 1 are placed on the same angle as the toroidal coil 4, and the bellows 7 provided on the shielding body 1 and the bellows 8 are thrown together. Poi (it is installed in two different positions.

Two or more sets of these bellows are installed over the entire circumference of the torus to obtain the necessary one-turn torque resistance.

Note that the inner vacuum container 6 which is a component of the insulated vacuum container 6
C is constructed of a thick vacuum wall except for the bellows part because it needs to have the strength to withstand an external pressure of 1/(7 ft). Therefore, the inner vacuum container 6C has a blocking effect against neutrons, and the main It is effective as a part of the barrier for the stabilizing material of the superconducting conductor of the toroidal coil 4 at the center side of the nuclear fusion device.

With this configuration, the inner vacuum container 6C has a flexible thickness even in the bellows 7 portion.
This makes it possible to compensate for the reduced thickness and ensure a sufficient shielding thickness. This (2) makes it possible to prevent the situation in which the resistivity of the stabilizing material of the 44 superelectric elements of the toroidal coil 4 exceeds the usage limit value in a short period of time, which was a concern in the past, and to shorten the annealing interval. This makes it possible to significantly improve the operating rate of the device.

As mentioned above, in a configuration in which a torus one-turn resistance is obtained using a bellows in a space in the inner part of a tokamak-type fusion device, the bellows 7 for the flexible body 1 and the bellows for the insulating vacuum vessel 6 are used. 8 are installed with their positions shifted in q directions in the torus direction, it is possible to ensure sufficient shielding thickness even in a narrow space, and the ratio of the stabilizing material of the superconductor 4 conductor of the toroidal coil 4 is It is possible to minimize the increase in resistance, which ultimately makes it possible to greatly contribute to improving the operating rate of the device.

Note that the present invention is not limited to the embodiment described above (for example, as shown in FIG. 6, the bellows 8 provided in the C inner vacuum container 6c is installed at the same angle as the toroidal coil 4, Bellows 7 k provided in 1 Bellows 8 above
The torus position K'x may be shifted in the direction of the torus and installed δ.

In addition, the present invention can be implemented with various modifications without changing the gist thereof.

〔Effect of the invention〕

As explained above (according to two aspects of the present invention, there is provided a shield body having a bellows in the toroidal direction which also functions as a plasma vacuum vessel for confining plasma inside the torus-shaped interior, and a superconducting conductor provided inside the shield body on the outer periphery of the shield body). It is composed of an insulating vacuum vessel in which a toroidal coil and a poloidal coil are installed and has bellows in the torus direction, and the bellows of each of the shield body and the insulating vacuum vessel are installed with four positions shifted in the torus direction. 0), the specific resistance of the 44 superconductors of the toroidal coil exceeds the usage limit (page i) in a short period of time. It is possible to provide a highly reliable nuclear fusion device that can perform

[Brief explanation of the drawing]

Figures 1 to 3 are diagrams showing conventional examples. Figure 1 is a schematic horizontal view of a nuclear fusion device, its origin, Figure 2 is a sectional view taken along line 11 in Figure 1, and Figure 3 is a cross-sectional view of Figure 2. Partially enlarged views, 'Tj4'J4 to 6 are diagrams showing one implementation of the present invention. Figure 4 is a schematic diagram of the nuclear fusion device. Figure 5 is the y-Vll diagram of Figure 4.
FIG. 6 is a cross-sectional view showing an embodiment of Iya of Suikai J. 1... Shiyahei body, 2... Plasma 1.9... Blanket, 4... Toroidal coil, 6... Insulated vacuum container, 6a Paper jar
6b...access tunnel, 6C...inside (It!
l @ vessel, 7, 8... bellows, 9... insulation material. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A toroidal coil and a boroidal coil are installed inside the shielding body, which is shaped like a torus and has a bellows in the direction of the torus, and which also serves as a plasma vacuum vessel to confine plasma inside, and a superconducting coil provided on the outer periphery of the shielding body. 1. A nuclear fusion device comprising a heat insulating vacuum vessel having a bellows in the torus direction, the bellows of each of the shielding body and the heat insulating vacuum vessel being shifted from each other in the torus direction.