KR101509222B1 - A heater assembly for testing heat shield performance of cask and a heater assembly - Google Patents

Abstract

The present invention relates to a heater assembly. According to the present invention, the heater assembly includes: a first linear heater including a first heat generation part that generates a first output per unit length and has an end portion, connected with an external power cable, and the other end portion on which a first connection part for electrical and mechanical connection of a heat wire is formed; a second linear heater including a second heat generation part that generates a second output per unit length and has an end portion connected with the external power cable, and the other end portion on which a second connection part for electrical and mechanical connection of the heat wire is formed; and a third linear heater including a third heat generation part that generates a third output and has one end portion on which a third connection part corresponding to the first connection part is formed and the other end portion on which a fourth connection part corresponding to the second connection part is formed. Heat generation performance and length are independently set for each of the first linear heater, the second linear heater, and the third linear heater. The first linear heater, the second linear heater, and the third linear heater are joined by the first, second, third, and forth connection part to correspond to each other.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heater assembly and a heater assembly for a cascade (CASK)

The present invention relates to a heater assembly, more particularly, to a cascade (CASK) thermal shutdown performance test, which has different calorific values per unit length for each region, The present invention relates to a heater assembly capable of providing a virtual environment for lung function testing.

CASK (CASK) is a container with a shielding function used for transporting and storing high radioactive materials. It refers to a fuel transport container used mainly for transporting spent nuclear fuel to a transporting and storage facility as a reprocessing plant.

The cask uses water and organic substances to block the release of neutrons from spent nuclear fuel, and iron and zinc to block radiation. It is usually large and heavy because it adds a lot of heat sinks to the surface to remove decay heat.

Special attention must be paid to the radiation, heat, and criticality of the intensity, since public and transportation workers are exposed to radioactivity or environmental pollution due to accidents during transportation. Therefore, it is necessary to establish safety standards (for example, internationally designated by the International Atomic Energy Agency (IAEA), design standards for use containers, safety standards for each country, etc.) ) Shall be designed and manufactured.

The thermal performance test for the cask heat resistance test is performed by assuming that the used fuel rod is housed inside the cask. To this end, a plurality of central heaters and peripheral heaters are installed to heat the inside of the cask, .

The Central Heater (Standard 1) and the Peripheral Heater ( Standard 2) for the thermal performance test for the production of the CASK conforming to the safety standards are classified according to the length and the output as shown in FIG. 1, respectively The output distribution for each region is shown in Table 1 below.

area Length Specification 1 (± 10%) W Specification 2 (± 10%) W A 400 22 12.16 B 2308 207 114.43 C 1000 55 30.41 D (A + B + C) 3708 284 157

That is, within the error range of 10% of the central heater, output of 22W is generated in A region, 207W in B region and 55W in C region, the output of all heaters must be 284W, It is necessary to generate an output of 12.16 W for the A region, 114.43 W for the B region, and 30.41 W for the C region, and the output of the entire heater must be 157 W. However, control of the heating value is insufficient only by adjusting the winding of the heater coil, It is difficult to manufacture them in Korea.

It is an object of the present invention to provide a cask (CASK) thermal shutdown performance test system, in which the calorific value per unit length is different for each area, It is possible to implement a heater assembly that is capable of providing a virtual environment for testing.

According to an aspect of the present invention, there is provided a heater assembly including an external power source connected to one end of a first heat generating unit for generating a first output per unit length, a first power source for electrically connecting the heat source to the other end, A first linear heater having a connecting portion formed therein; A second linear heater having an external power source connected to one end of the second heat generating part generating a second output per unit length and a second connecting part for electrical and mechanical connection of the hot wire to the other end; A third connection part corresponding to the first connection part is formed at one end of the third heating part for generating a third output per unit length and a third connection part corresponding to the third connection part corresponding to the second connection part is formed at the other end, A heater; The first linear heater, the second linear heater, and the third linear heater are respectively set to have heat generation performance and length per unit length, respectively, and are coupled to correspond to each other by the first to fourth connection portions. do.

And a plurality of third linear heaters are provided.

According to an aspect of the present invention, there is provided a heater assembly including: a first power source connected to one side of an external power source and having a first connection part for electrical and mechanical connection of a hot wire; A second power connection part having an external power source connected to one side and a second connection part connected to the other side such that a hot wire can be electrically and mechanically connected; A third connection part electrically connected to the first connection part is formed at one side, and a fourth connection part electrically connected to the second connection part is formed at the other side, and a fourth connection part having a first output per unit length A linear heater; A second linear heater having the third connection part formed at one side thereof and the fourth connection part formed at the other side thereof and having a second output per unit length; A third power source terminal, a second power source terminal, at least one first power source terminal, a second power source terminal, a third power source terminal, and a second power source terminal, wherein the third connection unit is formed at one side, Wherein the first linear heater, at least one second linear heater, and at least one third linear heater are coupled and connected in any order.

According to an aspect of the present invention, there is provided a heater assembly comprising: a first power connection part having an external power source connected to one side and a first connection part for electrical and mechanical connection of a line heater on the other side; A second power connection part having an external power source connected to one side and a second connection part corresponding to the first connection part to be electrically and mechanically connected; A first linear heater having the first connection part formed on one side and the second connection part on the other side and having a first output per unit length; A second linear heater having a first connection part formed on one side and a second output part formed on the other side of the second connection part; Wherein the first power source terminal, the second power source terminal, the at least one first line heater, and the at least one second line heater are coupled and connected in any order.

The heater assembly includes at least one N-3 (N> 3, N is integer) linear heaters each having the first connecting portion formed at one end thereof and the second connecting portion formed at the other end thereof, And the first connection part and the second connection part.

The first connection portion, the third connection portion, the second connection portion, and the fourth connection portion are each formed of a bolt and nut structure constituting an electrical terminal.

According to an aspect of the present invention, there is provided a heater assembly for testing a cascade thermal shutdown (CASK) system, the heater assembly comprising: the heater assembly; After the first connection portion and the third connection portion, and the second connection portion and the fourth connection portion are coupled, a heat-shrinkable insulation portion is formed on the outer periphery of the first connection portion and the fourth connection portion, .

According to an aspect of the present invention, there is provided a heater assembly for testing a cascade thermal shutdown (CASK) system, the heater assembly comprising: the heater assembly; And an external power cable connected to both ends of the heater assembly and including a steel wire portion for supplying external power and passing through the upper and lower walls of the cask.

According to the present invention, as described above, the present invention is used for CASK thermal shutdown performance test. The calorific value per unit length is different for each area, and the length of each area can be arbitrarily adjusted. It is possible to provide a virtual environment for.

Since the heaters are separately manufactured and connected to each of the regions, it is possible to freely adjust the materials and the rollers of the heat wires for each region, so that the calorific value can be easily measured and controlled.

1 is a schematic diagram showing lengths of heaters for cascade (CASK) heat-insulating performance test.
2 is a front view illustrating the heater assembly configuration of the first embodiment of the present invention.
3 is a cross-sectional view illustrating a configuration of a heater assembly of a first embodiment of the present invention.
4 is a cross-sectional view illustrating a first linear heater of a heater assembly of a first embodiment of the present invention.
5 is a cross-sectional view illustrating a second linear heater of the heater assembly of the first embodiment of the present invention.
6 is a cross-sectional view illustrating a third linear heater of the heater assembly of the first embodiment of the present invention.
7 is an exploded perspective view illustrating a configuration of a heater assembly according to a second embodiment of the present invention;

The above and other objects, features and other advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

The heater assembly 100 of the first embodiment of the present invention shown in FIGS. 2 to 6 includes a first linear heater 200 which generates a first output per unit length and has a first connection part 210 at one end, , A second linear heater (300) generating a second output per unit length and having a second connection part (310) formed at one end thereof, a third linear heater (300) generating a third output per unit length, A third linear heater 500 having a third connection part 510 corresponding to the first connection part 210 and a fourth connection part 520 corresponding to the second connection part 310 at the other end, And a power supply unit connected to the other end of the heater 200 and the other end of the second linear heater 300 by an external power cable 108 to supply power.

3 and 4, an external terminal connection part 220 is formed at one end of the first line heater 200 of the present embodiment, for example, at the left end of FIG. 3 and connected to the external cable 108 terminal. The external terminal connection part 220 And the first connection part 210 is formed at the right end of the first heat generating part 250. The first connection part 210 is formed at the right end of the first heat generating part 250. [

The external terminal connection part 220 includes a steel wire 201 at the left end, a heating bus bar 202 for guiding the first heating wire 208 to the first heating part 250, And a pair of sleeve connectors (203, 204) for electrically structuring the steel wire (202) and the steel wire (201).

The first heat generating portion 250 of this embodiment is wound at a proper density so as to generate a first output per unit length for the heat corresponding to the heater A region for the cascade (CASK) thermal shutdown performance test of Fig. 1 and Table 1 . For example, the first heating unit 250 is formed to have a length of approximately 400 mm (± 10%) corresponding to the CASK A region, and in the case of a central heater for thermal performance test, the output of the A region is 22 W (± 10%), the output per unit length is configured to output (22/400) W, while for the peripheral heater, the A-area output is 12.16W, and the output per unit length is (12.16 / W, and it is possible to use an appropriate chromium and manganese heat wire for controlling the calorific value.

A portion of the first heating portion 250 of the first heating portion 250 excluding the first heating line 208 is filled with an insulating material 260 MgO and the outer circumference of the first heating portion 250 is covered with a protective tube 280 made of stainless steel. .

The first connecting part 210 of the present embodiment may be formed of a nut or a bolt. When the first connecting part 210 is formed of a nut, the first heating wire 208 is fixed to one side of the nut by compression, And is enclosed in the protective tube 280. [ On the other hand, when the bolt is formed of a bolt, the first hot wire end portion is fixed by pressing on one side of the bolt, and the bolt protrudes outside the protective tube 280.

3 and 5, the second line heater 300 of the present embodiment has an external terminal connection part 320 connected to one end of the external cable 108, for example, at the right end of the drawing, The second heat generating part 350 is formed on the left side of the second heat generating part 320 and the second connecting part 310 is formed on the left end of the second heat generating part 350.

The external terminal connection part 320 includes a steel wire 301 at the left end, a heating bus bar 302 for guiding the second heating wire 308 to the second heating part 350, a heating bus bar 302, And a pair of sleeve connectors 303,304 electrically connecting the wires 301 electrically.

The second heat generating portion 350 of this embodiment is wound at a proper density so as to generate a second output per unit length for the heat corresponding to the C region of the heater for testing the thermal performance of the cascade (CASK). For example, the second heat generating portion 350 of the present embodiment is formed to have a length of approximately 1000 mm (± 10%) corresponding to the C region, and the output of the C region is 55 W (± 10% The output per unit length is configured to output 55/1000 W. In the case of the peripheral heater, the C-region output is configured to be 30.41 W, so that the output is (30.41 / 1000) W per unit length, Suitable chromium and manganese content heat lines can be used for the control.

A portion of the second heating portion 350 of the second heating portion 350 excluding the second heating line 308 is filled with an insulating material 360 MgO and the outer circumference of the second heating portion 350 is covered with a protective tube 380 made of stainless steel. .

The second connection part 310 of the present embodiment may be formed of a nut or a bolt. When the nut is formed of a nut, the end of the second heating wire 308 is fixed to one side of the nut by compression bonding, and the outer periphery of the nut is surrounded by the insulating material MgO As shown in Fig. On the other hand, in the case of a bolt, the end of the second heat ray 308 is fixed to one side of the bolt by pressing and the bolt protrudes outside the protective tube 380.

3 and 6, the third linear heater 500 of the present embodiment has a third connecting portion 510 formed at one end, for example, a left end, a fourth connecting portion 520 formed at the right end, A third heat generating portion 550 for generating a third output is formed between the first connection portion 510 and the fourth connection portion 520.

The third connection part 510 formed in the third linear heater 500 of the present embodiment may have the same electrical mechanical structure as the second connection part 310 of the second linear heater 300, The fourth connection part 520 formed on the first linear heater 200 may have the same electrical mechanical structure as the first connection part 210 of the first linear heater 200.

In this case, the first connection part and the fourth connection part of the present embodiment may be formed by bolts, and the second connection part and the third connection part may be formed by nuts, respectively. On the other hand, the first connection part 210 and the fourth connection part 520 The second connecting portion 310 and the third connecting portion 510 may be formed by bolts and the third connecting portion 510 may be fastened to the first connecting portion 210 and the third connecting portion 510 may be fastened to the second connecting portion 310. [ 4 connection unit 520 are coupled to each other.

The third heating portion 550 of this embodiment is wound at a proper density so as to generate a third output per unit length for the heat corresponding to the region B of the heater for cascade (CASK) thermal shutdown performance test. For example, the third heat generating portion of this embodiment is formed to have a length of approximately 2308 mm (± 10%) corresponding to the region B, and the output of the region B in the central heater is 207 W (± 10% The output is configured to produce an output of (207/2308) W, and in the case of a pheriperal heater, the B-domain output is 114.43 W, and the output per unit length is configured to provide an output of (114.43 / 2308) W, Suitable chromium and manganese content heat lines can be used for the control. A portion of the third heat generating portion of the present embodiment excluding the heat ray is filled with an insulating material MgO and an outer periphery of the third heat generating portion is formed of a stainless steel protective tube.

The output per unit length of the first linear heater 200, the second linear heater 300 and the third linear heater 500 and the total length of the respective heaters in the first embodiment are smaller than those of the CASK train But the present invention is not limited to this. The length of each of the line heaters 200, 300, and 500 and the calorific value per unit length are set to be different from each other depending on the use of the heater, According to the embodiment, it is possible to form a plurality of heaters (each heat amount per unit length and each total length may be different).

In the state where the third connection part is coupled to the first connection part 210 of the present embodiment, a heat shrinkable tube 105 formed of a heat shrinkable material is put on the outer periphery thereof, and the heat shrinkable tube is shrunk by heating to be insulated from the external part. do. In the state where the fourth connection part 520 is coupled to the second connection part 310, a heat-shrinkable tube 105 formed of a heat-shrinkable material is placed on the outer periphery of the second connection part 310. The heat-shrinkable tube 105 is contracted by heating, State.

In the heater assembly 600 of the second embodiment of the present invention shown in FIG. 7, the external terminal connection portion 611 is formed on one side and the first connection portion 612 for electrical and mechanical connection of the heat wire is formed on the other side. A second power connection part 620 having a first power connection part 610 and an external terminal connection part 621 on one side and a second connection part 622 on the other side of which a hot wire can be electrically and mechanically connected, A third connection part 710 through which a heat ray can be electrically and mechanically connected is formed and a fourth connection part 720 through which a heat ray can be electrically and mechanically connected is formed on the other side, A second linear heater 800 having a first linear heater 700, a third connecting portion 810 formed on one side thereof, a fourth connecting portion 820 formed on the other side thereof, and a second output per unit length, The third connecting portion 910 is formed on one side, Includes a third heater board 900 with the output of the third party is formed with the fourth connecting portion 920 in the unit length.

The first connection portion 612 of the first power connection portion 610 of the second embodiment may have the same outer shape and function as the first connection portion 210 of the first embodiment. In this case, The connection portion 612 is formed on the right side of the heat generating portion, whereas the first connection portion 612 of the second embodiment is formed on the right side of the external terminal connection portion 611.

The second connection portion 622 of the second power connection portion 620 of the second embodiment may have the same outer shape and function as the second connection portion 310 of the first embodiment, The connection portion 310 is formed on the left side of the heat generating portion while the second connection portion 622 of the second embodiment is formed on the left side of the external terminal connection portion 621.

The third connecting portions 710, 810, 910 and the fourth connecting portions 720, 820, 920 of the second embodiment are identical in outer shape and function to the third connecting portion 510 and the fourth connecting portion 520 of the first embodiment, Are provided on the left and right sides of the heater portion of the line heater, respectively, as in the first embodiment.

The first linear heater 700 and the second linear heater 700 may be formed in the same manner as the first linear heater 700 except that the first heat generating unit 750 of the second embodiment has one end of the heat wire pressed to the third connecting unit 710, The length and the heat generation characteristics are the same as those of the first heat generating part 250 of the first embodiment and the second heat generating part 850 of the second embodiment has one end of the heat wire pressed to the third connecting part 810, The length and heat generation characteristics of the second linear heater are the same as those of the second heating unit 350 of the first embodiment except that they are pressed onto the fourth connection unit 820. The shape, the structure length, and the heat generation characteristics of the third heating element 950 and the third linear heater of the second embodiment are the same as those of the third linear heater 500 of the first embodiment.

In the heater assembly 600 of the second embodiment, the first power connection part 610 and the second power connection part 620 are disposed at both ends, and at least one of the first linear heaters 700, One of the second linear heaters 800 and at least one of the third linear heaters 800 may be coupled and connected in any order.

In a state where the third connection portion 710 is coupled to the first connection portion 612 of the second embodiment and the fourth connection portion 920 is coupled to the second connection portion 622 and the fourth connection portion 920 is connected to the fourth connection portion 720, In the state where the connection portions 810 and 910 are coupled, a heat shrinkable tube 605 formed of a heat shrinkable material is put on the outer circumference of each joint portion, and the heat shrinkable tube 605 is contracted by heating to be in an insulated state from the outside.

Next, a manufacturing process of the heater assembly 100 according to the first embodiment of the present invention having the above-described structure will be described. The first linear heater 200, the second linear heater 300, and the third linear heater 500 Each of the separate standards, that is, the heat characteristic and the length, is produced separately.

When manufacturing the linear heaters 200, 300, and 500, a hot wire corresponding to the heat generation amount per unit length is selected, and a coil is manufactured with a winding radius and a winding radius corresponding to the heat generation amount. Both ends of the coil are connected to the electrical contact.

That is, in the case of the first shipboard heater 200 and the second shipboard heater 300 of the first embodiment, one end of the hot wire is connected to the first and second power connection units 220 and 320, 2 connecting portions 210 and 310, respectively. One end of the heat wire of the third linear heater 500 is joined to the third connecting part 510 and the other end is joined to the fourth connecting part 520.

With the protective tube (280, 380, 580) covered, the insulating material MgO is injected into the space outside the coil, filling MgO with no void space by bibling, then applying pressure by swinging, Cure to prevent moisture from penetrating.

The third connecting part 510 is coupled to the first connecting part 210 of the first embodiment by a bolt and nut structure and the fourth connecting part 520 is coupled to the second connecting part 310 by a bolt and nut structure.

When the connection to each connection portion is completed, the heat shrinkable tube 105 is put on the outer periphery of each coupling portion and heated, and the heat shrinkable tube 105 is contracted and surrounded by the heating so that the coupling portion becomes insulated from the outside.

It is obvious that the scope of the present invention is not limited to the above embodiments but is defined by the matters defined in the claims of the present invention and includes various modifications and alterations made by those skilled in the art within the scope of the claims.

100,600 ..... heater assembly 108 ..... power cable
200,700 First line heater 208 First heat line
210,612 ............ First connection part 260,360,560 ....... Insulating material
280,380,580 Protection tube 300,800 Second linear heater
308 ... second heat line 310, 622 ... second connection portion
500,900 Third Linear Heater 508 Third Heated Line
510, 710, 810, 910 ... Third connection part 520,720,820,920 ... Fourth connection part
250,750 First heat generating part 350,850 Second heat generating part
550, 950 ............ Third heating part

Claims (8)

A first linear heater having an external power source connected to one end of the first heat generating unit for generating a first output per unit length and a first connecting unit for electrical and mechanical connection of the hot wire to the other end;
A second linear heater having an external power source connected to one end of the second heat generating part generating a second output per unit length and a second connecting part for electrical and mechanical connection of the hot wire to the other end;
A third connection part corresponding to the first connection part is formed at one end of the third heating part for generating a third output per unit length and a third connection part corresponding to the third connection part corresponding to the second connection part is formed at the other end, A heater;
The first linear heater, the second linear heater, and the third linear heater are respectively set to have heat generation performance and length per unit length, respectively, and are coupled to correspond to each other by the first to fourth connection portions. Heater assembly.
The heater assembly according to claim 1, wherein a plurality of the third linear heaters are provided.
A first power connection part having an external power source connected to one side and a first connection part for electrical and mechanical connection of a hot wire to the other side;
A second power connection part having an external power source connected to one side and a second connection part connected to the other side such that a hot wire can be electrically and mechanically connected;
A third connection part electrically connected to the first connection part is formed at one side, and a fourth connection part electrically connected to the second connection part is formed at the other side, and a fourth connection part having a first output per unit length A linear heater;
A second linear heater having the third connection part formed at one side thereof and the fourth connection part formed at the other side thereof and having a second output per unit length;
And a third linear heater having a third output per unit length, wherein the third connection part is formed on one side and the fourth connection part is formed on the other side,
At least one first linear heater, at least one second linear heater, and at least one third linear heater are coupled and connected in any order in order to form the first power source terminal, the second power source terminal, .
A first power connection part having an external power source connected to one side and a first connection part for electrically and mechanically connecting the line heater to the other side;
A second power connection part having an external power source connected to one side and a second connection part corresponding to the first connection part to be electrically and mechanically connected;
A first linear heater having the first connection part formed on one side and the second connection part on the other side and having a first output per unit length;
A second linear heater having a first connection part formed on one side and a second output part formed on the other side of the second connection part;
Wherein the first power source terminal, the second power source terminal, the at least one first linear heater, and the at least one second linear heater are coupled and connected in any order.
4. The heater assembly of claim 3,
(N > 3, N is an integer) branched heaters each having the first connecting portion formed at one end thereof and the second connecting portion formed at the other end thereof are added to at least one arbitrary position, And the second connection portion is formed to be connected to the heater assembly.
The heater according to any one of claims 1 to 5, wherein the first connection portion, the third connection portion, the second connection portion, and the fourth connection portion are formed in a bolt and nut structure constituting an electrical terminal, respectively. assembly.
The heater assembly according to any one of claims 1 to 5;
After the first connection portion and the third connection portion, and the second connection portion and the fourth connection portion are coupled, a heat-shrinkable insulation portion is formed on the outer periphery of the first connection portion and the fourth connection portion, (CASK) < / RTI > thermal barrier test assembly.
The heater assembly according to any one of claims 1 to 5;
And an external power cable connected to both ends of the heater assembly for supplying external power and including a steel wire portion for passing through the upper and lower walls of the cask.

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