JPS60211397A - Method of housing high-level solid waste - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for storing high level solid waste.

Methods exist to contain and package high-level solid waste from nuclear waste treatment facilities.

Conventionally, as shown in FIG. 2, the solid waste A' is first sealed in a metal can a by a manipulator, and then inserted into a steel shielded container.

Next, the shielded container is transported by a crane or the like, placed on a steel pallet d in advance, and placed inside a reinforced concrete container C with an open top.

Thereafter, the opening of the reinforced concrete container C is reinforced with reinforcing bars e, and the reinforced concrete container C containing the shielding container is filled with concrete f, and after hardening, it is transported by a forklift or the like and stored in stacks.

These traditional high-level solid waste storage methods include:
There is room for improvement in several points as detailed below.

(b) Since there is nothing to cover the top of the steel shielding container with an open top, radiation control during transportation and installation work until it is installed in the reinforced concrete container C becomes complicated.

(b) The filled concrete f may crack due to drying shrinkage at the contact surface with the shielding container, and as a part of the filled concrete f is exposed to the outside, there is a risk of rainwater penetrating in the long term. There is.

(c) To stack the containers P' containing high-level solid waste in the above method, a steel pallet d is required on the earthen concrete floor B, and a conventional steel pallet d is required.
In this case, since the weight of the container P' is large, the limit is that it can be stacked in two stages.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a method for storing high-level solid waste that is more superior in terms of safety and workability than conventional methods.

That is, a primary container containing high-level solid waste and filled with concrete is installed inside a secondary container, and the
The present invention relates to a method for storing high-level solid waste, which is characterized by filling a container with a grouting material.

Next, the method for storing high-level solid refuse according to the present invention will be explained, but first, the container used in the present invention will be explained. (Fig. 1) (a) Metal can and shielding container The metal can 1 is a known container in which high-level solid waste A is sealed by a manipulator.

The shielding container 2 is a well-known steel box with an open top.

The shielding container 2 has a depth and a size with sufficient space around the hoop when the metal can 1 is stored therein.

(b) Primary container The primary container 3 is a box made of reinforced concrete, and has sufficient depth when the shielding container 2 is housed inside.

(c) Secondary container The secondary container 4 is a reinforced concrete box with an open top that houses the primary container 3.

The size of the container should be such that there is sufficient depth and width when the primary container 3 is stored.

Furthermore, a protruding portion 41 is provided on the external bottom surface, which protrudes in an area slightly smaller than the bottom surface.

In addition, on the upper opening side, a lid holder is provided with a flange projecting inward to receive a lid 42 to be described later.
There is.

Additionally, hooks are attached to the top and bottom of the secondary container 4 for hanging work and for leveling.

(iv) Lid The lid 42 is a plate made of reinforced concrete that closes the opening of the secondary container 4.

A protrusion 41 protruding from the bottom of the secondary container 4 is provided on the upper surface thereof.
Four parts 44 are recessed for fitting.

Furthermore, a grout hole 4 that passes vertically through the plate-shaped lid body 42
Open multiple 5.

Next, a method for storing high-level solid waste using each of the above-mentioned members will be explained.

(a) Storing into the primary container The high-level solid waste A stored in the metal can 1 is inserted into the shielding container 2 using the manipulator.

Then, the shielding container 2 is installed in the primary container 3 with the opening facing upward, and is filled with concrete 5.

Concrete 5 is filled between the shielding container 2 and the metal can 1 in the primary container 3 and inside the primary container 3, and hardens.

(b) Storing in the secondary container The primary container 3 filled with concrete 5 is installed in the secondary container 4.

Thereafter, the lid 42 is placed on the lid holder 43 of the secondary container 4 to close the opening of the secondary container 4.

At this time, the lid 42 is positioned so that the four parts 44 face the outside of the secondary container 4.

If high-level solid waste A is expected to generate heat, a pipe may be installed between the primary container 3 and the secondary container 4 and connected to the outside through the grout hole 45 to circulate cold water. It is also conceivable to cool it down.

(c) Fill the grouting material 6 such as mortar into the grout hole 45 of the plow 1 to the injection lid 42 and into the hollow portion of the secondary container 4 closed by the lid 42 .

(d) Storage of containers in stacks (Fig. 1) On top of the container P placed on the concrete floor B, other containers P1 and Pz are stacked in multiple stages using a forklift or the like.

At this time, the protrusion 41 on the bottom of the containers fits into the recess 44 of the lid 42, creating stable stacking.

Since the present invention is as explained below, the following effects can be expected.

(b) When transporting and installing high-level solid waste in the final secondary container, the opening of the shield container is already blocked with concrete, which improves the shielding performance. radiation management is easy.

It is also possible to save labor in the transportation equipment within the processing facility.

(b) The shielding performance is further improved because the concrete is already filled when installed in the primary container, and the secondary container is further stored and filled with grouting material.

Further, since the concrete that is in direct contact with the metal can is surrounded by a secondary container closed with grout and a lid, it is impossible for rainwater to penetrate.

(c) Since the covering performance is good, it can be applied directly to the earthen concrete floor.

Therefore, there is no need to use steel pallets that have a limited load capacity. 1 is possible, is economical, and increases savings.

(d) A protrusion and a recess are provided on the bottom of the secondary container and the top of the lid so that they fit together, allowing for stable stacking.

[Brief explanation of the drawing]

Figure 1: Explanatory diagram of the container according to the present invention Figure 2: Illustration of a conventional high-level solid waste container 1: Metal can 2: Shielding container 3: Primary container 4: Secondary container 5: Concrete 6: Grout material A: High level solid waste P: Container

Claims (1)

[Claims] A primary container containing high-level solid waste and filled with concrete is installed in a secondary container, and the secondary container is filled with grouting material. How to store high-level solid waste.