JPS5925998B2 - liquid processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in liquid treatment equipment used, for example, in nuclear power plants.

Nuclear power plants are equipped with liquid treatment equipment such as desalters or filters to treat radioactive waste liquid.

By the way, since the liquid handled by this liquid processing apparatus is radioactive, radioactive substances accumulate as it is operated.

For this reason, this liquid processing device is housed within a shielded chamber.

However, as the liquid processing equipment is operated, its processing capacity decreases.

For this reason, it is necessary to replace or clean the elements housed in these liquid processing devices at certain intervals.

However, in conventional liquid processing apparatuses, the container is composed of a bottomed vessel with an opening at the top and a lid that closes the opening of the bottomed vessel.

Furthermore, the lid is fixed by direct bolt tightening.

For this reason, in order to replace the elements within the liquid processing apparatus, it is necessary for a worker to approach the apparatus itself, which has a highly radioactive atmosphere.

The present invention has been made in view of the above-mentioned circumstances, and it is also an object of the present invention to provide a liquid processing apparatus in which elements within the liquid processing apparatus can be replaced without approaching the liquid processing apparatus with a highly radioactive atmosphere.

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the liquid treatment device 10 is housed within a shield 11. As shown in FIG.

This shield 11 is a part of the reactor containment building in the nuclear couplant.

The shield 11 is a closed container that covers the liquid processing device 10, and a take-out pit 12 is bored at a position directly above the liquid processing device 10.
A shielding lid 13 is provided to cover the area.

The liquid processing device 10 includes a bottomed container 15 with an upper opening, a lid 16 that closes the opening of the bottomed container 15, and the bottomed container 1.
5 and an element 17 housed within the element 5.

A liquid feed pipe 18 and a liquid drain pipe 19 for carrying the liquid to be treated are connected to the bottom of the bottomed vessel 15, respectively.

Further, the upper opening of the bottomed container 15 is formed with a somewhat wide edge 20 in the shape of a flange.

This edge 20 has several through holes 21 made therein.

The lid 16 is plate-shaped and matches the outer shape of the edge 20.

At the periphery of the lid 16, that is, at positions that coincide with the through holes 21 formed in the edge 20, downwardly long studs 25 are installed.

This stand 25 has a length sufficient to penetrate the support bed 24 supporting the liquid processing device 10.

Further, screws are cut at the lower ends of the studs 25, respectively.

Because of this structure, when replacing the element 17 of the liquid processing device 10, first enter the lower space 27 of the support bed 24 and remove the bolt 26 of the stud 25 installed in the lid 16.

Thereafter, the shielding lid 13 of the shielding body 11 is removed by a crane 28, and the lid 16 is lifted and taken out of the shielding body 11 with the stand 25 still attached.

Thereafter, the target element 1γ is taken out and replaced with a new element.

After that, the lid 16 taken out from the shield 11 is placed back into the shield 11.
The bottomed container 15 is sealed.

This operation is the reverse of the previous operation.

Since the liquid processing apparatus of the present invention is configured in this manner, it is possible to reduce the amount of radiation exposure of workers.

That is, the lid of the container in which the radioactive material accumulates can be unlocked by operating from outside the shielding body.

Incidentally, in the present invention, the stand 25 is attached to the bottomed vessel 1 as shown in FIG.
The cover 16 may be planted upward on the edge 20 of the cover 16, and a through hole 31 may be provided in the cover 16.

At this time, a hollow cylinder 32 is provided around the stand 250, and the tightening force of the bolt 26 is applied to the lid 16 through the hollow cylinder 32.

This is advantageous when there is no suitable space below the liquid treatment device 10.

Furthermore, even when there is an appropriate lower space 27 below the support bed 24 as shown in FIG. 3, if the hollow cylinder 32 is used,
No extra stress is applied to the support floor 24, and the design of the support floor 24 becomes easier.

Incidentally, the gap between the through hole drilled in the shielding body 11 is filled with lead hair or the like or the diameter of the bolt 26 is increased to prevent streaming of radiation.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view showing one embodiment of a liquid processing apparatus of the present invention, and FIGS. 2 and 3 are schematic views showing other embodiments of the present invention. 15...Bottomed vessel, 16...Lid, 17...Element, 25...Stand, 26...Bolt, 32...
・Hollow cylinder.

Claims (1)

[Scope of Claims] 1. An element for processing a liquid, a bottomed vessel for accommodating this element, and a lid for closing an opening of the bottomed vessel;
In a liquid processing device comprising a relatively long stand that presses the lid against the opening of the bottomed vessel, the stud has one end attached to the lid and the other end passing through a support bed that supports the bottomed vessel. A liquid processing device characterized by: 2. An element for processing a liquid, a bottomed vessel for accommodating this element, and a lid for closing an opening of the bottomed vessel;
In a liquid treatment device comprising a relatively long stand that presses the lid against the opening of the bottomed vessel, the stud has one end attached to the bottomed vessel and the other end attached around the stud. A liquid processing device characterized in that a compressive force is applied to a lid via a hollow cylinder that penetrates a floor on which a bottomed container is installed.