JPS58178238A - Leak detector for lining tank - Google Patents

Abstract

PURPOSE:To accurately and early detect the leak position of a stored liquid from lining welded parts by a detector which makes monitoring with a leak detecting port tube provided outside of a lining tank. CONSTITUTION:At the outerside of a welded part 12 of a liner plate 11 constituting a lining tank 10, a leak detection tube 20 is provided to cover the welded part and it is partitioned into plural parts so that the leak position may be easily determined. A plurality of conduits 40 are connected between the lowermost parts of the leak detection tube 20 and a leak detecting port tube 30 provided outside of the lining tank 10. Apparatus are buried in concretes or so together with iron reinforcing rods 50 as a structural frame for the lining tank. When leaked through the welded part of the lining tank, a stored liquid is moved into the lowermost part of the leak detection tube corresponding to the leak location and then naturally transferred to the leak detecting port tube 30 to be accummulated therein. The accummulated leak liquid can be easily identified by visual inspection, a float with an alarm, survey utilizing property (e.g. radioactivity) of the stored liquid, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lining tank, and more particularly to a leakage detection device for a nuclear storage tank.

The lining tank, which is buried in concrete, etc., is constructed by welding a number of bales of Kuina plates, but outside the tank at the welded joints, there is a It is well known that a leak detection port pipe is provided at the same weld.

Conventionally, as a leak detection method, a plurality of conduits are connected from the leak detection tube to a header to be buried, and the method is as follows.
A well-known method is to guide the tip of a header with a downward slope to the ground and detect leakage there.

In this spear's 4-point detection device, if the header light layer
If leakage is detected, even if leakage from the lining tank can be confirmed, it is often difficult to detect the location of the leakage point. In addition, in the case of a lining tank that does not need to be installed in the basement, for example, installed on the building mat layer, there is a problem with how to treat the tip of the heave.

The purpose of the present invention is to prevent leakage by installing the lining outside the tank.
We aim to provide a leakage detection device that can accurately and early detect the position of leakage of stored liquid from a lining weld by monitoring the pipe.

A feature of the present invention is to install a leak detection port pipe at the same height as the lining tank outside the lining tank.

This 1st leak detection port pipe and the lining tank leakage outlet pipe are connected by a conduit that connects the lining tank. In addition, it is easy to make older siblings quickly, and I am looking forward to the smooth process of dealing with tJi4 leaks.

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

2 in FIG. 1, a leak detection tube 20 is provided outside the welded portion 12 of the liner plate 11 forming the lining tank 10 at the welded portion T-ridge.
It is divided into several sections to make it easy to locate the leak location. (For convenience of explanation, this drawing is divided into four sides and one bottom.) A plurality of conduits 40t are in communication between the lowest part of the leak detection tube 20 and a leak detection port tube 300 provided outside the two-inning tank 10. The above-mentioned equipment, along with the reinforcing bars 50 that form the frame of the lining tank, are placed in concrete, etc.! ! It is set up. (Concrete is M) In the event of leakage from the contact part of the lining tank, the stored liquid will be transferred to the lowest part of the leakage detection pipe corresponding to the leakage point, and the conduit 40 installed there will be able to Hoji, leak detection tube 3
Naturally transported to 0 and accumulated. Accumulated rtfc leak 1
[The properties of the stored liquid are checked visually and with an alarm (
li! For example, it can be easily confirmed by a survey using radioactivity.

According to the above-described embodiment of the present invention, (1) The tip 41 of the conduit provided in the one-hole detection port pipe has the advantage that the leakage position from the lining fitting part can be easily known.

(2) The leak detection port pipe 30 is almost similar in shape to the second innings tank 10, and the direction of the outlet of the leak detection pipe and the mounting direction of the tip 41 of the conduit inside the leak detection port are matched, so this embodiment Then, in the leak detection port pipe, the leak direction t of the lining tank is
Experience the effects in a casual and refreshing way.

(3) The setting position of the lining tank is not dependent on the setting position, since it can lead to leak detection even in a geological formation-free area, for example. If the atmosphere at the location where the lining tank is installed, for example, emits a high level of radiation and is difficult to get close to, set up the leak detection port in a safe area away from the lining tank. You can do it, 70W! The range can be expanded.

(4) The material of the leak detection tube, the conduit, and the leak detection port tube can be selected depending on the properties of the stored liquid, and the leakage detection tube can also have a sealed structure. Therefore, it is possible to prevent accidents in which the water permeates into the concrete structure outside the tank.

(5) The lining tank, leak detection pipe, conduit, and leak detection port pipe can be made into large modules and installed together with reinforcing bars. Therefore, the lining tank liner plate, etc. can be concreted as part of an integrated construction.

According to the present invention, by monitoring the conduit end *1 of the leakage detection port pipe, > inning tank 1! ! The soundness of the copying part is evaluated, and even in the unlikely event of a leak, the location of the leak can be detected easily and early.

[Brief explanation of the drawing]

FIG. 1 is a diagram of one embodiment of the present invention (a diagram of the claws adopted in a lining tank). 10... Lining tank, 20... Leak detection tube, 30
・・・Man] Mouth

Claims (1)

[Claims] 1. A lining tank, a leak detection tube that connects the litchi plate welded part of the lining tank outside the tank, and a conduit that transfers the leaked liquid from the lower part of the leak detection tube. A lining tank that takes advantage of the fact that a leak detection tube is installed at the tip of each conduit to detect leakage points. II leak detection device.