JPS5932899A - Method of cutting cut material contaminated with radioactivity in inner space - 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 cutting an object to be cut, such as a pipe or a closed container whose internal space is radioactively contaminated.

For example, when remodeling or dismantling a nuclear reactor facility and it is necessary to cut off 9J of pipes that are radioactively contaminated inside, conventionally, local exhaust equipment or vinyl power bars, etc., are used to prevent contamination of the work area. and prevent workers from being exposed to radiation11
-I'm looking forward to it. But do these methods prevent the diffusion of radioactive materials? Prevent it in full winter? Moreover, there are problems in that workability is poor, work time is long, and radiation exposure is high.

Therefore, the present invention is a 9-cut method that solves these problems. Q) A small hole is formed in a suitable place for a workpiece whose internal space is radioactively contaminated. The purpose of this method is to fill the inside of the object to be cut with a synthetic resin liquid that does not contain any plastic, and after the six-component resin liquid has hardened, cut the object to be cut and the middle part of the cured synthetic resin liquid. Since it is easy to cut and the time required for cutting is extremely short, the amount of radiation exposure can be reduced even in high-radiation areas. ``f3: Similar, it is something that can be saved.In addition, the equipment and fees required for cutting are relatively inexpensive, making it highly economical.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In FIG. 1, (1) is a grease filling machine, and spray cans (2) and (3) separately store two-component synthetic resin liquids A and B, respectively. ! :, both cans (
2) Liquid A received from <3) via the vibrator (4) and Bi&. a mixing section (5) for mixing the
It consists of a nozzle (6) for pouring the mixed liquid inside.

Next step is cutting? To explain this, as shown in Figures 1 and 2, the inside is... Radioactively contaminated pipes (7
) Form a small hole (8) with a K drill. Next, the resin filling machine (
Push the nozzle (6) of 1) through the small six (8), and from the nozzle (6) into the pipe (7), mix liquid of Δ liquid and B axillary, which has a fast curing speed and is non-porous. Synthetic resin gI
1 (9) and close the inside of the pipe (7) as shown in FIG. Next, after the synthetic resin liquid (9) has hardened, the piping (7) and the central portion of the cured synthetic resin liquid (9) are cut off by νJ, as shown in FIG.

In addition, when the pipe (7) is inclined or along the horizontal line, the injection point should be slightly lowered or Place a balloon-shaped or diaphragm-shaped stopper above the river to form a weir! -7, it may be injected afterwards.

A second embodiment of the present invention will be described based on FIG. In other words, put liquid A and B (Ii) in a pot (1) and mix.
．． A synthetic resin liquid (0) with a curing rate of <1 and no air permeability is formed. Next, the synthetic resin liquid (9
) Luxury?・Inject into the pipe (7) through the funnel (1υ),
After that, 1: The same procedure as in the first embodiment may be used. ．． As mentioned above, according to the method of cutting radioactively contaminated objects according to the present invention, the work is easy and it is possible to cut 9 pieces. Since the time required for this is extremely short, it is possible to keep radiation exposure low even in extremely low or high radiation areas. It also takes 1.7J to break. The utensils and lees are also relatively cheap and highly economical. The filled synthetic resin liquid has no air permeability through the air bubbles, and has high pore expansion and expansion.
{Even if the body is broken, the close contact with the inner surface of the object to be cut is high! Furthermore, because of its agitation and adhesion properties, it can be completely sealed and prevent the leakage of solid liquids and gases.

[Brief explanation of the drawing]

Figures 1 to 4 show Akira Kokora's first embodiment. Figure 4 is a longitudinal cross-sectional view after injection of synthetic resin liquid.
．． It is a vertical cross-sectional view after cutting :l2l,'J. FIG. 5 is a longitudinal cross-sectional view showing an embodiment of {R2 of the present invention, during injection of synthetic resin liquid. (1)...Resin filling machine, (6)...Nosle, (7)
... Piping (targeted, IJ disconnection), 0'l) ... Small hole, (9) ... Synthetic transverse liquid -527-

Claims (1)

[Claims] ■． A small hole is formed in the appropriate place of the 9J cut piece whose internal space is radioactively contaminated, and a synthetic resin liquid that hardens quickly and is non-porous is filled through the small hole and into the cut piece to close the inside of the 9J cut piece. A method for cutting an object whose internal space is radioactively contaminated, which comprises cutting the object and the central part of the cured synthetic resin liquid after the synthetic resin liquid has hardened.