JPH01201192A - Large-sized apparatus transfer-in/out port of isolated facilities - Google Patents

Abstract

PURPOSE:To enable the simultaneous execution of an operation for transferring out plural large-sized apparatus, materials, etc. and operation for transferring in the same and to improve the efficiency of the transfer-in/out operations by disposing an auxiliary open/shut door for hermetic shutting of a transfer-in/out path between an outside open/shut door and an inside open/shut door. CONSTITUTION:The transfer-in of the large-sized apparatus is executed by first opening the inside open/shut door and carrying the large-sized apparatus into the transfer-in/out path by using a crane, etc., while holding the outside open/shut door shut. The inside open/shut door 3 is then shut and thereafter, the outside open/shut door 2 is opened and the large-sized apparatus placed in the transfer-in/out path 1 is transferred to an operator disposed in a space 6 on the outside of a reactor container. After the auxiliary open/shut door 11 is shut, both the outside open/shut door 2 and the inside open/shut door 3 are opened. Since the spaces 4, 6 on the inside and outside of the reactor container are held hermetically shut by the auxiliary open/shut door 11 at this time, the space 4 in the reactor container is maintained under a negative pressure with respect to the space 6. Simultaneous opening of the auxiliary open/shut door 2 and the inside open/shut door 3 is enabled and, therefore, the efficiency of the transfer-in/out of the large-sized apparatus, materials, etc., is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Objective of the invention) (Industrial application field) The present invention is intended for use in industrial facilities such as nuclear power plants, etc.
4. Concerning loading/unloading entrances, in particular, the large equipment loading/unloading entrances of isolation facilities that can dramatically improve the efficiency of large-scale equipment loading operations and shorten the period of work such as monthly inspections.

(Conventional technology) Nuclear power plants, semiconductor manufacturing factories, microbial research facilities where genetic modification experiments, etc. We have installed a facility separated by 100 m from the main road, and the equipment is operated inside the facility.

For example, in a nuclear power plant, even if radioactive materials leak into the reactor containment vessel, the pressure inside the reactor containment vessel must be kept low to prevent the radiation from spreading outside. so that the pressure is always negative relative to external pressure.
It has TI11.

Therefore, Figures 3-3, '! As shown in the figure, a large equipment loading/unloading path 1, which is formed by communicating the inside and outside of the reactor containment vessel, is equipped with an The structure is such that when one door is open, the other door is interlocked to prevent it from opening. That is, in order to keep the inside and outside of the reactor containment vessel airtight and maintain a constant pressure difference, the opening/closing doors of both Is are configured so that they are not opened at the same time.

The inner opening/closing door 3 facing the reactor containment vessel interior space 4 is provided so as to slide 4 in the horizontal direction along guide rails 5 provided above and below the end of the loading/unloading path.

On the other hand, it is composed of a pair of opening/closing @2a, 2b provided facing the outer space 6 of the reactor containment vessel and opening/closing outward around the outer spacers 12t, t and rotations N7a, 7b.

The ceiling of the earth loading/unloading path 1 is equipped with large equipment 8 for loading/unloading and a crane 9 for hoisting piles, etc., and a crane rail 10 for driving the crane 9 is installed.

Next, during periodic inspections, etc., the loading and unloading of large equipment configured as above [J is used to carry out the work of loading large equipment 8, etc., see Figures 3 and 4. Shikaku Seiki: I.

First, the outer opening/closing door 2 is opened and the large equipment 8 to be carried into the reactor containment vessel is carried into the carrying-in/out passage 1.

After the outer opening/closing door 2 is completely closed, the inner opening/closing door 3 is opened and the large equipment 8 is transferred to the reactor containment vessel internal space 4.

On the other hand, the procedure for carrying out the large equipment 8 from the reactor containment vessel internal space 4 to the outside is as follows.

First, the required number of workers are placed inside and outside the reactor containment vessel (4.6). Next, after closing the outer opening/closing m2, the inner side 'Ar11R3 is opened, and the large equipment 8 to be carried out is carried into the carrying-in/out passage 1. The inner opening/closing door 3 is roughly closed, and a contamination test is performed on the large equipment 8 to be carried out to check for any abnormality. If the gauntlet is not found, the outer opening/closing door 2 is opened and the large n-type device 8 is handed over to the worker who was waiting in the outer space 6 of the reactor containment vessel.

In addition, if there are multiple large-sized containers 8 to be transported,
They are carried into the loading/unloading passage 1 in batches within the capacity of the loading/unloading passage 1, and are passed through a contamination test in the same manner as described above before being handed over to the outside of the reactor containment vessel, and the outer opening/closing door 2 is closed. The work was carried out sequentially.

(5) Problems to be Solved by the Invention) Taking the large equipment loading entrance of a raw squid power plant as an example, the conventional structure of the large equipment loading/unloading entrance requires continuous loading and unloading of multiple large pieces of equipment. When carrying out the work, the work opening where the first large equipment was brought in is closed as long as the outer +11 door is open. It was not possible to carry in the work, and it was also impossible for work L1 to enter and exit the work L1 himself.

By the way, the inside of the loading/unloading entrance and the space outside the reactor containment vessel are subject to contamination control standards. Workers are not allowed to go out into the space.In other words, workers must return to the reactor containment vessel space for 10 hours, have their bodies checked for contamination, change clothes, etc. at a designated location, and only then be able to move to other areas. This strict contamination inspection usually takes about 30 minutes.

Therefore, the first large T! ! The workers who were engaged in the work of carrying in and out the vessels had to wait in the carry-in/out passage 1 until all the large-sized Il vessels had been transferred into the carry-in/out passage 1. Therefore, there is a possibility that the radiation dose for the work rl will increase, and there is a drawback that the efficiency of carrying in and out work is low.

In other words, even if the worker who was responsible for carrying out the first large piece of equipment to be carried out has finished carrying out the large piece of equipment he/she is responsible for, does he/she wait in the loading/unloading lane until the last large piece of equipment has been carried out? Otherwise, you will not be able to exit the loading/unloading path unless you interrupt the series of unloading operations and close the outer opening/closing door and open the inner opening/closing door when you finish your own work, and you will not be able to continue with other operations. It was impossible to implement the

In addition, the worker in charge of carrying out the last large piece of equipment had to wait for a long time in the loading/unloading path until all the preceding carrying out work was completed.

On the other hand, when a series of carry-out operations is interrupted and resumed when the worker is moved in and out of the carry-in/out route, the outer opening/closing door is closed, then the inner opening/closing door is opened, and the worker is moved out of the carrying-out/unloading route. This requires the operation of guiding the worker into the loading/unloading path, closing the inner opening/closing door after sending the worker into the loading/unloading passage again, and then opening the outer opening/closing door, resulting in a total of four door opening/closing operations. During this time, the unloading work is interrupted, which has the disadvantage of extremely decreasing work efficiency.

In addition, at the loading/unloading entrance of a large VI device with a conventional structure, the outer opening and closing door and the inner opening and closing door are not opened at the same time.
Even in the case of relatively small equipment, it is impossible to carry out loading and unloading operations at the same time.
The disadvantage is that the efficiency of loading and unloading work is extremely low.

In recent years, there has been an increasing demand for increasing the utilization rate of nuclear power generation facilities and improving the economic efficiency of their operation, and there is a desire to shorten periodic inspection periods.

The present invention has been made to solve the above-mentioned problems, and provides a large equipment loading/unloading entrance for isolated facilities such as nuclear power plants that can improve the efficiency of equipment loading/unloading work and shorten periodic inspection periods. The purpose is to provide.

(Structure of the Invention) (Means for Solving the Problems) In order to achieve the above object, the large equipment loading/unloading entrance of the 11 facility according to the present invention is a loading/unloading entrance that communicates the outside and the inside of the 11 facility. 5 at the large equipment loading/unloading entrance of the isolation facility, which is equipped with a passageway, an outer opening/closing door and an inner opening/closing door that are installed at both ends of the loading/unloading passage and keep the loading/unloading passage airtight when closed.
3, an auxiliary opening/closing door was provided between the outer opening/closing door and the inner opening/closing door to airtightly close the loading/unloading path. This is called a characteristic.

(Function) When carrying out large equipment at the large equipment carry-out entrance of the space 111J@ with the above configuration, first open the inner door 411 with the outer opening/closing door (7) stopped, and Bring some large equipment into the loading/unloading area. Next, after closing the inner opening/closing door, the outer door 111 is opened, and the large-sized ship brought into the loading/unloading path is handed over to a worker stationed in the space outside the building of the isolation facility.

After completing the handover work, the worker moves to the loading/unloading path between the auxiliary opening/closing door and the inner opening/closing door. Next, after closing the auxiliary opening/closing door, both the outer opening/closing door and the inner opening/closing door are opened. At this time, the space inside and outside the isolation facility is hermetically closed by the auxiliary opening/closing door, so the space inside the isolation facility is maintained at a negative pressure with respect to the space outside the isolation facility.

When the auxiliary opening/closing door is closed, the distance between the outside rlJm
Since it is possible to simultaneously open the inner and inner N opening/closing doors, it is possible to carry large equipment to be carried out continuously into the loading/unloading path inside the isolation facility of the auxiliary opening/closing door, while the auxiliary amount mq Large equipment can be carried into the loading/unloading path on the opposite side at the same time.

Next, after closing both the outer ffI door and the inner opening/closing door, open the auxiliary opening/closing door, and move the equipment carried into the loading/unloading path on both sides of the auxiliary opening/closing door to the loading/unloading path on the opposite side of the auxiliary opening/closing door. do. Next, after closing the auxiliary opening/closing door again, both the outside opening/closing door and the inside opening/closing door are opened, and the large equipment is carried into the space inside the isolation facility, and the large equipment is carried out from the loading/unloading path to the space inside and outside the isolation facility. The work will be carried out in parallel.

In this way, by opening and closing the auxiliary opening/closing door, it is possible to carry out the unloading and loading of multiple large equipment and materials at the same time, which was previously impossible. Carrying in and out of equipment can be carried out extremely efficiently.

Therefore, taking a nuclear power plant as an example, periodic inspection periods can be shortened, which in turn improves the utilization rate of factory equipment, research equipment, etc., and greatly improves the operating rate and operating economy.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings, taking an isolation facility of a nuclear power plant as an example. FIG. 1 is a cross-sectional view showing an embodiment of a large equipment loading/unloading entrance with a gap of f11 according to the present invention, and FIG.
[I[This is a sectional view taken in the direction of the arrow.

Note that the same elements as the 11 conventional example shown in Figs. 3 and 4 are marked with 1]
-A symbol is attached.

The entrance/exit for large VI instruments of the isolation +m facility according to this embodiment, the loading/unloading path 1 that communicates the external space 6 and internal space 4 of the reactor containment vessel as an isolation facility, and both ends of the loading/unloading path 1. An isolation/closing door provided with an outer opening/closing door 2 and an inner opening/closing door I73 which keep the loading/unloading passage 1 airtight when closed.
At the large-sized container loading/unloading entrance installed in II, the outside opening/closing door 2
An auxiliary opening/closing door 11 for airtightly closing the loading/unloading path 1 is disposed between the inside opening/closing door 5-3.

The auxiliary opening/closing door 11 is composed of a pair of opening/closing doors 11a, 11b that open and close to one side around rotating shafts 12a, 12b. Furthermore, a plurality of viewing windows 13 are installed in the auxiliary opening/closing door 11 so that the work situation in the loading/unloading path 1 on the opposite side of the auxiliary opening/closing door 11 can be seen through. This viewing window 1
No. 3 is constructed by laminating two layers of pressure-resistant Gaussian sheets, each of which has a reinforcing net inside, for example. Further, the crane rail 10 is configured to be rotatable in the horizontal direction about the support shaft 14 so that a) parts that interfere with the opening/closing operation of the auxiliary opening/closing door 11 can be avoided.

Next, the effect of this example is 2 C nuclear power plant isolation 1M
This will be explained using a stage as an example.

When carrying out large equipment at the large T1 equipment entrance/exit of the isolation facility according to this embodiment, first the outer rFI door 2
With the door closed, the inner door 3 is opened, and a crane 9 or the like is used to carry the large R container to be carried out into the carry-in/out passage 1. Next, after closing the inner opening/closing door 3, the outer opening/closing door 2
is opened and the large equipment placed in the loading/unloading path 1 is handed over to a worker placed in the outer space 6 of the reactor containment vessel. After completing the delivery work, the opening moves to the carry-in/out passage 1 between the auxiliary opening/closing door 11 and the inner opening/closing door 3. Next, after closing the auxiliary opening/closing door 11, both the outer opening/closing door 2 J5 and the inner opening/closing door 3 are opened. At this time, the reactor containment vessel inner and outer space 4°6 is hermetically closed by the auxiliary opening/closing rR11, so that the reactor containment vessel inner space 4 is maintained at a negative pressure with respect to the reactor containment outer space 6. .

When the auxiliary opening/closing J5i11 is closed, it is possible to open the outer opening/closing door 2 and the inner opening/closing door 3 at the same time. While it becomes possible to carry in the equipment 8a continuously, it is also possible to carry in the large equipment 8b to be carried in at the same time into the carry-in/out passage 1 on the opposite side of the auxiliary opening/closing door 11. The work progressing simultaneously on both sides of the auxiliary opening/closing door 11 can be mutually viewed through the viewing window 13.

Next, after closing both the outer opening/closing door 2 and the inner opening/closing door 3, the auxiliary opening/closing door 11 is opened, and the large devices 8a and 8b carried into the loading/unloading path 1 on both sides of the auxiliary opening/closing door 11 are moved to the auxiliary opening/closing door 11. Move to loading/unloading path 1 on the opposite side. At this time, since the auxiliary opening/closing door 11 is open, the multiple lane rails 10 shown in FIG. 1 can be connected and used.

Next, after closing the auxiliary 17g closing door 11 again, both the outer opening/closing door 2 and the inner opening/closing door 3 are opened, and the work of carrying the large-sized vessel 8b into the reactor containment vessel internal space 4, and the loading/unloading path 1
The work of transporting the large equipment 8a from the reactor containment vessel to the outer space 6 of the reactor containment vessel is carried out in parallel.

In this way, by opening and closing the auxiliary opening/closing door 11, it becomes possible to carry out the unloading and loading operations of multiple large devices at the same time, which was previously impossible. Also, loading and unloading of materials, etc. can be carried out extremely efficiently.

Therefore, the periodic inspection period can be shortened, and the utilization rate of the nuclear power generation equipment can be improved, and the economic efficiency of its operation can be greatly improved.

In addition, when carrying out work that involves carrying out multiple pieces of equipment continuously,
The work of closing the auxiliary surface ff1ffill and opening the outer opening/closing door 2 to carry out the preceding equipment to the outer space 6 of the reactor containment vessel is carried out in parallel with the work of carrying the next equipment to be carried out into the loading/unloading passage 1. It can be implemented by That is, the workers placed in the reactor containment vessel internal space 4 can continuously carry the VA device to be carried out next into the carrying-out passage 1 without interrupting the carrying-out work of the preceding equipment.

Note that the large equipment loading/unloading entrance according to this embodiment is not limited to nuclear power plants, but can be used in all facilities equipped with loading/unloading entrances that communicate airtight isolated spaces, such as semiconductor manufacturing equipment, genetic recombination experiments, etc. It can be widely applied to facilities such as microbial research equipment, toxic substance AJ manufacturing factories, and cold storage warehouses.

〔Effect of the invention〕

As explained above, according to the large aircraft entrance/exit of the isolation facility according to the present invention, when the auxiliary opening/closing door is closed, the outside opening/closing door and the inside 171 folding door can be opened simultaneously. The loading/unloading path inside the isolation facility with the opening/closing door allows for the continuous delivery of large [DELTA] to be exported, while the loading/unloading path on the opposite side of the auxiliary opening/closing door allows large units to be transported in. They can be carried in at the same time.

In this way, by opening and closing the auxiliary RFL door, it becomes possible to carry out the unloading and loading of multiple large IF devices and materials at the same time, which was previously impossible. Loading and unloading of large equipment can be carried out extremely efficiently.

Therefore, periodic inspection periods can be shortened, which in turn improves the utilization rate of factory equipment and research equipment, and greatly improves operational efficiency and availability.

[Brief explanation of the drawing]

FIG. 1 is a plan cross-sectional view showing an embodiment of the human-shaped Nada instrument entrance/exit of the present invention, and FIG. 2 is the I in FIG. 1.
3 is a cross-sectional view showing an example of the structure of a conventional large-scale machine at a nuclear power plant. There is a cross-sectional diagram. 1... Loading/unloading path, 2... Outside opening/closing door, 2a, 2b.
・Opening/closing door, 3...Inner opening/closing, 4...Nuclear power】
Space inside the containment vessel, 5... Guide rail, 6... Space outside the reactor containment vessel, 7a, 7b... Rotating shaft, 8, 8
a, 8 b--Humanoid cup, 9... Crane, 1
0... Crane rail, 11... Auxiliary opening/closing door, l'q
a, l', b...open/close IW, 12a, 12t)...
Rotating shaft, 13-112g window, 14... Support shaft. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A loading/unloading path that communicates the outside and inside of the isolation facility building;
At a large equipment loading/unloading entrance of an isolation facility that is equipped with an outside opening/closing door and an inside opening/closing door that are arranged at both ends of the loading/unloading passage and keep the loading/unloading passage airtight when closed, the outside opening/closing door and the inside opening/closing A large equipment loading/unloading entrance for an isolation facility characterized by an auxiliary opening/closing door that airtightly closes the loading/unloading path between the door and the door.