CZ278087B6 - Portable screening through container with extensible plate - Google Patents

Abstract

On the vertical axis of the body (20) of the container there is an upper case (26) with seating, a hollow (30) and a peripheral groove (29) for the arresting ring (8) and a lower case (27) with seating and a hollow (30) and inside the hollows of these cases (26, 27) are threads (6,7) for the upper and lower closure (1,2) with pins (4,5) of the upper and lower closure (1,2); the neutron emitter (10) is mounted in the container between the faces of the pin (4,5) of the upper and the lower closure (1,2) between which there is a plotting desk (3) equipped with a hole (31) and passing through a gap created in the side of the body (20) of the container and between the upper and the lower case (26, 27).<IMAGE>

Description

Portable shaded through container with retractable foil

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable shielding transit container having a retractable foil for handling and shielding a neutron radiator in confined conditions.

BACKGROUND OF THE INVENTION

In order to regulate the performance of a nuclear power plant, it is necessary to change the concentration of the boric acid aqueous solution, the actual control medium in the controlled circuit of the nuclear power plant. This concentration is detected and controlled in boric acid analyzers, or boronometers, which are directly connected to the control circuit path. The boron meters operate with a neutron emitter located in a shielded repository when the boron meter is not in operation. However, the neutron emitter should be moved to the boron meter repository as required. It is the handling of the neutron emitter in cramped conditions of nuclear power plants, where lifting mechanisms or more workers cannot be used at the same time, and therefore it is not possible to use large and massive containers, but perfect shielding of the neutron emitter from the external environment is required. So far, only an interval check of the concentration of the boric acid aqueous solution by chemical analysis has been carried out or the neutron radiator has only been transferred in a lightly inadequately shielded housing, which does not meet the safety conditions, while

SUMMARY OF THE INVENTION

The most progressive solution so far is the invention of a portable shielding container, which, however, does not solve the problem of protecting the operator from neutron emitter radiation when loading and unloading it into a boric acid analyzer where the emitter needs to be removed and freely emits neutron radiation into the surrounding space. These drawbacks are solved by a portable through-flow shielding container with a retractable foil consisting of a container body forming a container shell dividing the upper and lower canopy with a container cylinder provided with handles and comprising a shielding charge. It consists in that in the vertical axis of the container body there is an upper sleeve with a shoulder, a cavity and a circumferential groove for a locking ring, and a lower sleeve with a shoulder and a cavity, inside the cavities of these sleeves are threads for the upper and lower caps with pins. the upper and lower shutters, while the neutron radiator in the container is clamped between the faces of the upper and lower shutter pins, between which is inserted a foil provided with an opening and a passing slot formed in the side of the container body and between the upper and lower sleeves.

The advantage of the portable shading through-loading container with a retractable foil is mainly its low weight, which is given by the lightweight construction of the container, but with a very good shading effect and at the same time small dimensions, which allows handling by only one worker. The key advantage is that there is no need to remove the neutron emitter from the container when inserting and removing it from the boric acid analyzer, as the container is mounted on the analyzer inlet throat and releases the neutron emitter to the analyzer under its own weight when the locking mechanism is released. , but the entire workplace is protected from the effects of neutron radiation, which can have a significant effect on the health of the operator.

Overview of the drawings

An example of a practical embodiment is shown in the accompanying drawings, in which Fig. 1 is a vertical axial section of the container, Fig. 2 the container is in the closed state and Fig. 3 the container in the through state.

DETAILED DESCRIPTION OF THE INVENTION

As can be seen from FIG. 1, the container according to this embodiment consists of a container body 20 which forms a housing 21 welded in three parts; there is a shielding cartridge 25 vertically in the container axis. An opening for the upper sleeve 26 and the lower sleeve 27 is secured in the container by a securing ring 8 of the upper sleeve 26 that extends into the peripheral grooves 29 in the shoulder of the upper sleeve 26 and the ring 9 of the lower sleeve 27. The upper and lower sleeves 26, 27 are provided at their outer ends with an internal thread 6, 7 and a shoulder corresponding to the dimensions of the upper and lower shutters 1, 2. the upper and lower bushes 26, 27 are detachably mounted. The upper and lower bushes 26, 27 have a cavity 30 in their vertical axis, in which a neutron radiator 10 is inserted, which is secured against spontaneous movement when manipulated by the pin 4 of the upper closure 1 which, like the pin 5 of the lower closure 2 Shielding function. A retractable foil 3 with an opening 31 at its inner end is inserted approximately in the middle of the container. If the extension plate 3 is advanced enough to center its opening 31 with the cavities 30 of the upper and lower housings 26, 27, after removal of the lower cap 2, the neutron radiator 10 can be spontaneously moved into the boric acid analyzer. To improve the handling of the container, it is provided with handles 28 on both sides of the container.

PATENT CLAIMS

Claims (1)

PATENT CLAIMS Portable shading through-loading container with a retractable foil, consisting of a container sheath defining an upper canopy, a lower canopy and a container body with handles comprising a shielding charge, characterized in that an upper housing (26) is disposed in the vertical axis of the container body (20). a circumferential groove (29) for the locking ring (8) of the upper sleeve (26) and the lower sleeve (27), wherein both the upper sleeve (26) and the lower sleeve (27) are provided with internal threads (6) of the upper closure (1) and an internal thread (7) of the lower cap (2), while a neutron radiator (10) is clamped between the faces of the pin (4) of the upper cap (1) and the pin (5), the lower cap (2), below which the foil (3) is inserted. ) provided with an opening (31) and passing through a slot formed in the side of the container body (20) and between the upper shell (26) and the lower shell (27).