KR200385366Y1 - neutron detector for nucleus measure - Google Patents

Abstract

 The present invention consists of an external passage selector and an inner passage selector installed in the outer passage selector and rotated in response to a signal of a controller and connected to a selected nuclear measurement cable by rotating guide tubes into which the nuclear measurement cable is inserted. In the dual-color passage selector, the upper portion of the passage selector and the housing is fixed to the support installed on the passage selector, and the first external rotary joint fitted in the housing and rotates in conjunction with the rotation of the guide tubes A second external rotary joint installed on the first external rotary joint and rotating together with other guide tubes connected to the core of the reactor, and rotatably fitted to the first external rotary joint; First internal rotary joints respectively connected to the tubes; The anti-twist device of the neutron detector for nuclear power plant nuclear measurement characterized in that it is installed rotatably fitted to the second external rotary joint and comprises a second internal rotary joint connected to the guide tubes, respectively. We propose a dual-color passage selector.

Description

Dual-color channel selector with anti-twist device of nuclear neutron detector for nuclear power plant

The present invention relates to a dual-color passage selector of a neutron detector for nuclear power plant nuclear measurement. In particular, a twist prevention device is installed on the passage selector to prevent twisting of guide tubes into which the nuclear measurement cable is inserted. The present invention relates to a dual-color passage selector having a twist prevention device for a neutron detector for nuclear power plant nuclear measurement.

As is well known, a nuclear fission state and neutron flux measurement in a core are periodically conducted by periodically introducing a cable (a nuclear measurement cable) equipped with a measurement sensor into a core (a portion where fuel assemblies are gathered) of the reactor. Since the operator is prohibited from entering and leaving the cable, the operator does not directly carry the cable in and pulls it in, but the nuclear measurement cable is drawn in from the outside through the guide tube while the guide tube is connected in the core.

That is, a drive used to perform such cable entry work typically includes a driver forcibly drawing out the cable by power, and a passage selector for selectively selecting the cable drawn from the driver according to a signal from a controller and passing it into the core. have.

Among the above devices, as mentioned above, the passage selector is a device for selectively passing the cable drawn out from the driver into the core according to the signal of the controller. The passage selector is installed in the outer passage selector corresponding to the outer passage, and is provided in the outer passage selector. It consists of a plurality of internal passage selectors that rotate the guide tubes into which the nuclear measurement cable is fitted and connect the selected nuclear measurement cable by rotating the guide tubes.

However, the passage selector as described above frequently occurs because the guide tubes are rotated by the rotation of the inner passage selector, and thus the guide tubes are twisted with each other during the rotation process. Likewise, when the guide tubes are twisted with each other, the nuclear measurement cable cannot be introduced into the core of the reactor through the guide tube, so that the nuclear fission state and the neutron flux measurement cannot be performed.

Therefore, the present invention for solving the above problems is to install a twist prevention device on the top of the passage selector to prevent the guide tubes passing through the nuclear measurement cable to be twisted with each other due to the rotation of the inner passage selector. The present invention provides a dual-color passage selector with a twist prevention device of a neutron detector for nuclear power plant nuclear measurement.

The present invention for achieving the object as described above is a nuclear measurement cable selected by rotating an external passage selector, a guide tube is installed in a plurality of the external passage selector and rotates according to the signal of the controller and the nuclear measurement cable is fitted In the dual-color passage selector consisting of an internal passage selector for connecting with the housing, the upper portion of the passage selector and the housing fixed to the support installed on the passage selector, fitted in the housing and interlocked together as the guide tubes rotate A first external rotary joint and a second external rotary joint installed on the first external rotary joint and rotating together with other guide tubes connected to the core of the reactor, and the first external rotary joint. Rotatably fitted in the joint and connected to the guide tubes The first internal rotary joints and the second internal rotary joints rotatably fitted to the second external rotary joints, characterized in that the installation includes a twist prevention device consisting of the second inner rotary joints connected to each of the guide tubes.

Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

Fig. 1 shows the overall configuration of a bicolor passage selector of a neutron detector for nuclear power plant nuclear measurement.

Referring to FIG. 1, the passage selector 10 controls an external passage selector 12 corresponding to an outer cylinder, and guide tubes 16a installed in the outer passage selector 12 and into which a nuclear measurement cable is inserted. It consists of a plurality of internal passage selectors 14 (four in the present invention) which rotate in accordance with the signal of the diagram and connect with the selected nuclear measurement cable. That is, the passage selector 10 having such a configuration, when the nuclear measurement cable is drawn out by the operation of a driver (not shown in the drawing), rotates the guide tubes 16a according to the signal of the control unit, and the nuclear measurement cable drawn out. It is then passed through the reactor core (not shown).

On the other hand, at the upper end of the passage selector 10 configured as described above, due to the rotation of the inner passage selector 14, the guide tube 16a passing through the nuclear measuring cable rotates with each other so that the twist prevention device 20 is not twisted. To be installed, the detailed configuration of the anti-twist device 20 will be described with reference to FIGS.

Referring to the drawings, the anti-twist device 20 includes a housing 22, first and second external rotary joints 28 and 30 rotatably installed in the housing 22, and first and second external parts. It consists of a plurality of first and second internal rotary joints 32 and 34 rotatably fitted to the rotary joints 28 and 30, respectively.

The housing 22 constitutes an external shape of the twist prevention device 20, and a plurality of brackets 24 protrude along the circumferential surface of the upper and lower openings, and the bracket 24 has the passage described above. Supports 18 installed on the top of the selector 10 are fastened to the pin 26 to support the housing 22. That is, the housing 22 has a structure fixedly installed on the support 18.

The first external rotary joint 28 is a rotating body that rotates in conjunction with the guide tubes 16a that rotate by the operation of the internal passage selector 14, and the second external rotary joint 30 is the core of the nuclear reactor. It is a rotating body that rotates in conjunction with the guide tubes (16b) to be connected into. In addition, four first internal rotary joints 32 are vertically installed in the first external rotary joint 28, and four second internal rotary joints 34 are vertically installed in the second external rotary joint 30. Installed through.

Meanwhile, the first and second internal rotary joints 32 and 34 are rotatably penetrated to the first and second external rotary joints 28 and 30, respectively, as mentioned above, and the first internal rotary joint 32 is provided. ) Is connected to the guide tube (16a) is fitted to the first external rotary joint 28 and connected to the inner passage selector (14). The second inner rotary joints 34 are connected to other guide tubes 16b which are fitted to the second outer rotary joint 30 and are connected in the core of the reactor. In addition, the first and second internal roller joints 2 and 34 are formed with holes 32a and 34a through which the nuclear measurement cables passed through the guide tubes 16a and 16b are inserted, respectively.

That is, the anti-twist device 20 having the above-described structure is connected to the inner passage selector 14 when the inner passage selector 14 rotates to pass the cable selected according to the controller signal into the guide tube 16a. The guide tubes 16a are twisted with each other due to the rotation of the inner passage selector 14, wherein the first inner rotary joints 32 connected to the guide tubes 16a and the first inner rotary joints 32 are connected to each other. The first external rotary joint 28 having the internal rotary joint 32 inserted therein rotates in the housing 22 in conjunction with the rotation of the guide tubes 16a, thereby preventing the twisting of the guide tubes 16a. You can do it. In addition, the guide tubes 16b connected in the core of the reactor rotate in cooperation with the second internal rotary joints 34 and the second external rotary joints 30 to which the second internal rotary joints 34 are fitted. By doing so, the guide tubes 16b connected in the core of the nuclear reactor can also be prevented from being twisted. A detailed description thereof will be described in detail in the Operational State section below.

Hereinafter, the operation of the bi-colored path selector having the twist prevention device of the neutron detector for nuclear power plant nuclear measurement configured as described above will be described with reference to FIGS. 1 to 4.

First, when the nuclear measurement cable is drawn out by the operation of the driver, the inner passage selector 14 rotates according to the signal of the controller and positions the guide tubes 16a on the drawn cable. At this time, the guide tube (16a) can be prevented from being twisted with each other through the twist prevention device 20 of the present invention in the process of rotating.

That is, when the guide tubes 16a are rotated, the first internal rotary joints 32 connected to the guide tubes 16a are rotated, whereby the first internal rotary joints 32 are inserted. The first external rotary joint 28 is rotated in the housing 22 so that the guide tubes 16a can be rotated without interference by being intertwined by the first external rotary joint 28 which rotates in conjunction with each other. do. In this case, the first inner rotary joints 32 are also idling with the first outer rotary joints 28 being fitted, thereby preventing the guide tubes 16a from being individually twisted.

Meanwhile, a second external rotary joint 30 located above the first external rotary joint 28 and another guide tube 16b fitted to the second external rotary joint 30 and connected to the core of the reactor. The second inner rotary joints 34 connected to the first and second inner rotary joints 34 are also rotated together with the first outer rotary joint 28 and the first inner rotary joint 32 so that the guide tubes 16b connected to the core are also rotated. You can prevent them from being twisted together.

In other words, the guide tubes 16a connected to the inner passage selector 14 and the guide tubes 16b connected in the core of the reactor are mutually rotated through the anti-twist device 20 of the present invention. Twisting can be prevented, and thus the nuclear metrology cable drawn from the driver can be easily introduced into the core of the reactor through the guide tubes 16a, 16b.

As described above, the present invention is installed in the upper portion of the passage selector to prevent the guide tubes passing through the nuclear measuring cable to twist each other due to the rotation of the inner passage selector to smooth the cable into the core of the reactor It will have an effect that can be introduced.

1 is a view showing the configuration of a bi-color path selector having a twist prevention device of the neutron detector for nuclear power plant nuclear measurement according to a preferred embodiment of the present invention.

FIG. 2 is a diagram three-dimensionally showing the configuration of a twist prevention device installed in the passage selector shown in FIG.

3 is a cross-sectional view of the anti-twist device shown in FIG.

4 is a plan view of the anti-twist device shown in FIG.

<Description of the symbols for the main parts of the drawings>

10: path selector 12: external path selector

14: internal passage selector 16a, 16b: guide tube

20: anti-twist device 22: housing

28: 1st external rotary joint 30: 2nd external rotary joint

32: 1st internal rotary joint 34: 2nd internal rotary joint

Claims (1)

An internal path selector 12 and a plurality of guides 16a installed in the external path selector 12 and rotating in response to a signal of the controller and into which the nuclear measurement cable is inserted are connected to the selected nuclear measurement cable. In the bi-color passage selector composed of passage selectors 14, The upper portion of the outer passage selector 12 A housing 22 fixed to the support 18 installed on the outer passage selector 12; A first external rotary joint 28 inserted into the housing 22 and rotating together with the guide tubes 16a in rotation; A second external rotary joint 30 installed on the first external rotary joint 28 and rotating together in accordance with the rotation of other guide tubes 16b connected to the core of the reactor; First inner rotary joints 32 rotatably fitted to the first outer rotary joint 28 and connected to the guide tubes 16a, respectively; The second external rotary joint 30 is rotatably fitted to the anti-twist device 20 is composed of a second internal rotary joints 34 are connected to the guide tubes (16b), characterized in that it is installed A dual-color passage selector with an anti-twist device for neutron detectors for nuclear power plant nuclear measurement.