JPS5930476Y2 - In-furnace shipping filter processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an apparatus for automatically processing a shipping filter that detects damaged fuel in a furnace.

Conventional in-core shipping involves placing a chamber over the fuel assemblies in the reactor core, sending air into the chamber, and sucking up the water in the channels of the fuel assemblies and collecting it in a test bottle, etc., to generate power. Radiation measurements were being carried out in room 1 of the facility.

For this reason, it takes time to handle the sample water, and direct labor is required to collect the sample water, which poses a problem in terms of radiation exposure for workers.

This idea was developed based on the above circumstances, and the purpose is to create an in-furnace shipping filter that can shorten the in-furnace shipping time, shorten the periodic inspection period, and reduce the radiation exposure of workers. The purpose of this invention is to provide a processing device.

This invention will be explained below based on an illustrated embodiment.

In FIG. 1, numeral 1 indicates a fuel assembly disposed in the reactor core.

Reference numeral 2 denotes a chamber, which is placed over the top of the fuel assembly 1.

A water suction pipe 3 is inserted into this chamber 2, so that water in the fuel assembly 1 can be sucked in.

The other end of the water suction pipe 3 opens onto a measuring cup 7 via a conduit 4 and on-off valves 5 and 6.

Reference numeral 8 denotes a clean water outlet pipe, and a cleaning water supply source 10 is connected to this pipe 8 via an on-off valve 9.

The measuring cup 7 is housed in an airtight envelope Ia, and a suction pipe 12 is connected to the envelope Ia.
It is connected to the.

Further, a sample water take-out pipe 15 is connected to the measuring cup 7, and this sample water take-out pipe 15 has an on-off valve 16 and a pair of cup-shaped filtering nozzles 17a.

It is connected to the storage tank 14 via 17b.

A vacuum pump 18 is connected to this storage tank 14 .

19 is a drain valve. Further, 20 is a solid matter removal filter, and 21 is an ion exchange filter, which are automatically processed by a filter processing device which will be described in detail below.

Figures 2 to 5 regarding the configuration of the filter processing device described above.
This will be explained based on the diagram.

FIG. 2 shows the filter supply mechanism 26. FIG.

2γ. 28 is a filter magazine; one magazine 27 is loaded with a solid matter removal filter 20, and the other magazine 28 is loaded with an ion exchange filter 21.

Magazine shutters 29, 29 (only one is shown) are provided below the filter magazines 27, 28, respectively.

This magazine shutter 29 has a pair of rotation shafts 31, 31 that are rotated back and forth in conjunction with the operation of the cylinder mechanism 30.
Filter clamping pieces 32, 32 are attached, and the filters 20, 21 are held and released by rotating the filter clamping pieces 32, 32 in synchronization with each other.

Further, 35 is a movable trolley, and this movable trolley 35 is intermittently moved by a predetermined distance on a rail 36 serving as a guide by a drive mechanism (not shown).

The movable cart 35 has plate-shaped supports 37 that are vertically spaced apart.
．． 38, and each support body 37, 3B is formed with a large number of cutout-shaped filter mounting parts 39, 40 (only one set is shown in the drawing) along the longitudinal direction, opening in opposite directions. 0 The cylinder mechanism 4 is installed in the lower filter mounting part 40.
The ion exchange filter 21 is taken out from the filter magazine 28 and fitted into the filter magazine 28 by the pusher 42 reciprocated by the pusher 1, and the filter magazine 27 is taken out and fitted into the upper filter mounting part 39 by another pusher (not shown). A solid matter removal filter 20 is fitted therein.

The mobile cart 35 also includes the filter mounting portions 39 and 40.
A sensor (not shown) is provided to detect the presence or absence of a filter and the position of the filter.

On the other hand, FIG. 3 shows a sample water passage mechanism 50.

This mechanism is based on the filtering nozzle 17a17 described above.
b, on-off valve 16, storage tank 14 and vacuum pump 18
It is used to pass the sample water in the measuring cup T through the filters 20 and 21.

The filtering nozzle 1γa 17b is attached to horizontal members 53 and 54 that are driven up and down by lifting cylinder mechanisms 51 and 52, respectively, and the filter case 20a is moved by the elastic force of a spring 550 as shown in FIG. , 21a are brought into close contact with each other.

FIG. 5 also shows a filter collection mechanism 60. As shown in FIG.

This mechanism consists of a first collection section 61 and a second collection section 62, and the first collection section 61 takes out only the solid matter removal filter 20 from the moving cart 35 and discards it in a stocker 66 described below.

The first collecting section 61 includes a cylinder mechanism 63, a catch member 64 driven by the operation of the cylinder mechanism 63, a chute 65, and a stocker 66.

On the other hand, the second recovery section 62 takes out the ion exchange filter 21 from the movable cart 35, and the cylinder mechanism 67
It has an extrusion member 68 that is reciprocated by the operation of.

Reference numeral 69 denotes a guide for guiding the transport of the taken out ion exchange filter 21, and on the unloading side of this guide 69 there is a filter packaging mechanism (
(not shown) is provided.

Next, the operation of the above configuration will be explained.

First, the chamber 2 is placed over the fuel assembly 1.

Then, air is supplied to chamber 2 from an air purge system (not shown).
The water level in chamber 2 is lowered, and each fuel assembly 1 is
Make the water inside independent.

Then, open the on-off valves 5 and 6°13, and open the on-off valve 9.
, 16, and 19 are closed, and the vacuum pump 18 is operated to collect sample water into the measuring cup 7.

On the other hand, in the filter supply mechanism 26, the magazine shutters 29, 29 and the pushers 42, 42 are operated to mount the solid matter removal filter 20 and the ion exchange filter 21 in the filter mounts 39, 40, respectively.

Next, the moving cart 35 is moved toward the sample water passage mechanism 50.

When the filters 20 and 21 are located between the filtering nozzles 17a and 17b, the lifting cylinder mechanisms 51 and 52 are operated to move the filtering nozzles 1γa
.

17b is pressed between the filters 20 and 21, and the filters 20 and 21 are integrated with each other as shown in FIG.

In this state, the on-off valves 6 and 13 are closed, the on-off valve 16 is opened, and the vacuum pump 18 is operated to allow the sample water in the measuring cup 7 to pass through the filters 20 and 21.

Then, the solid matter removal filter 20 removes solid matter such as dust, while the ion exchange filter 21 adsorbs nuclear fission products such as krypton and xenon gas dissolved in the sample water.

When the water flow is finished, the cylinder mechanism for lifting and lowering 51°52
Activate the filtering nozzle 17a.

17b and move the mobile cart 35 to the filter collection mechanism 6.
Move to 0.

Then, the cylinder mechanism 63 is operated in the first collection section 61, and the solid matter removal filter 20 on the moving cart 35 is dropped into the chute 65 by the hook member 64, and is disposed of in the stocker 66.

Further, the cylinder mechanism 67 is operated in the second recovery section 62, and the ion exchange filter 21 is pushed out toward the guide 69 by the pushing member 68 and sent to a filter packaging mechanism (not shown), where the filter 21 is packaged.

Then, the collected ion exchange filter 21 is sent to a radiation measurement room, and radiation inner canthus l is performed.

According to the apparatus of the above embodiment, the filters 20 and 210 are automatically attached to the moving carriage 35 by the filter supply mechanism 26 while the moving carriage 35 is moving, and the filters 20 and 210 are automatically attached to the moving carriage 35 by the sample water passage mechanism 50. .
1 can be automatically collected without human intervention, making it possible to increase the efficiency of the shipping work, and furthermore, since the shipping work does not require manpower, there is no risk of workers being exposed to radiation.

As explained above, this invention includes a filter supply mechanism in the middle of the movement path of the mobile cart moving along the guide.
A sample water flow mechanism and a filter collection mechanism have been installed to automatically perform filter processing during in-furnace shipping without the need for human intervention, simplifying shipping work and increasing efficiency. It is possible to reduce radiation exposure and shorten periodic inspection periods.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, and Fig. 1 is a schematic diagram of the automatic shipping device, Fig. 2 is a perspective view of the filter supply mechanism Q, Fig. 3 is a perspective view of the sample water passage mechanism, and Fig. 4. 5 is a longitudinal sectional view of the filtering nozzle portion, and FIG. 5 is a perspective view of the filter recovery mechanism. 1...Fuel assembly, 2...Chamber
7... Measuring cup, 14... Storage tank, 17at17b... Filtering nozzle, 20... Filter (solid matter removal filter),
21... Filter (ion exchange filter), 2
6...Filter supply mechanism, 35...Moving trolley, 36...Guide (rail), 39°4
0...Filter attachment part, 50...Sample water passage mechanism, 60...Filter recovery mechanism.

Claims (1)

[Scope of utility model registration request] a movable cart that is provided with a filter mounting portion and moves along a guide; a filter supply mechanism that is provided in the middle of the moving route of the movable cart and that mounts the filter on the filter mounting portion;
In-furnace shipping characterized by comprising a sample water passage mechanism for passing sample water collected from inside the furnace through the filter, and a filter collection mechanism for taking out the filter from the moving cart and sending it to the filter packaging section. Filter processing device.