JPS61272693A - Mobile type inspector - 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: Industrial Application Field 1 The present invention relates to a mobile inspection device, and particularly to a device that remotely or automatically monitors and inspects equipment in a radiation environment such as a nuclear power plant. It is.

[Prior art 1] Conventionally, this type of device has been used, for example, in Japanese Patent Application Laid-Open No. 52-520.
There was a morrail type inspection device shown in Publication No. 91. In other words, a mole rail is laid around the reactor steam generator, turbine condenser, pump, and individual equipment with piping and valves that connect them, and inspection vehicles are run around them. It is to be inspected accordingly. The inspection vehicle is equipped with temperature detection elements, including an ITV camera.
Equipped with monitoring elements such as radiation detection elements, acoustic detection elements, and infrared television cameras, it monitors and detects abnormalities in the reactor steam generator during traveling patrols. Additionally, a control panel will be installed in a safe location such as the central control room to control the driving of the inspection vehicle and display information from the inspection vehicle on a panel. In this case, the ITV camera mounted on the inspection vehicle detects abnormalities in the appearance of the installed equipment, such as water leaks from valves and steam leaks, and the temperature detection element monitors the temperature during stationary operation and leaks. Abnormal temperature associated with accident -1
The radiation detection element detects an abnormal increase in radiation due to a leakage accident, and the acoustic detection element detects abnormal vibration noise from equipment or abnormal noise due to coolant leakage due to pipe rupture, etc. Infrared television cameras detect leaks of high-temperature, high-pressure steam by capturing the infrared rays emitted from the high-temperature steam.

With the configuration described in [2] above, it is possible to travel around the radiation environment of a nuclear power plant or the like instead of a human, and remotely or automatically monitor and inspect equipment on the travel route.

[Problems to be Solved by the Invention] Such conventional mobile α-inspection devices are equipped with a large number of inspection electronic devices on an inspection vehicle and travel in a radiation environment.
Over time, electronic equipment becomes damaged and deteriorates until it becomes unusable. In addition, radiation damage and damage to electronic equipment installed in inspection vehicles
Since the degree of progress of deterioration varies greatly depending on the usage conditions of the inspection device, it is difficult to predict failures in advance, and there has been a problem in that situations such as sudden failures occurring during the period of use are unavoidable.

The present invention has been made to solve the above-mentioned problems, and it is possible to predict in advance failures due to radiation exposure of equipment installed in inspection vehicles due to radiation exposure, and to prevent situations in which the equipment installed in inspection vehicles becomes unusable during the period of use. The purpose is to obtain a mobile inspection device that can prevent such occurrences.

[Means for Solving the Problems 1] The mobile inspection device according to the present invention includes a radiation dose rate meter that measures the environmental radiation intensity of a mobile inspection vehicle, an integrator that constantly integrates the output, and an integrator that integrates the output. The output is compared with the radiation resistance usage limit data of the inspection equipment mounted on the inspection vehicle, and if the usage limit is exceeded, a request is made to replace the equipment.

[Effect 1] In the above configuration, damage caused by radiation exposure is generally known to depend on the integrated dose of radiation, and as in the present invention, the integrated value obtained by integrating the output of the radiation dose rate meter is measured in advance. Radiation resistance of inspection equipment - 4 = By comparing with line usage limit data, it is possible to predict the time of failure of the inspection equipment, and the operator replaces the inspection equipment as appropriate.

[Example 1 Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In the figure, (1) is a mole rail laid along the patrol inspection route, (2) is a moving mechanism, (3) is an inspection vehicle equipped with inspection equipment, and (4) is an inspection vehicle (3) that communicates wirelessly. This is a control panel installed in a safe remote location such as a central control room for remote control.

The inspection equipment installed on the inspection vehicle (3) includes a television camera (31), a microphone (32), and a temperature sensor (
33) and a humidity sensor (34), and a radiation dose rate meter (35) for detecting the environmental radiation intensity of the inspection equipment is provided around this, and in addition to these,
It includes a communication fl (36) that inputs each output signal, a control device (37) that controls this communication device (36), and a power supply device (38) for all of these devices.

The control panel (4) also includes a communication device (3) for the inspection vehicle (3).
It includes a communication device t (41) for communicating with the inspection vehicle (3), an operating device (42) for operating the inspection vehicle (3), and a television camera (31) equipped with the inspection vehicle (3). Microphone (32), temperature sensor (33), humidity sensor (
34), and a monitor television (43), a speaker (44), and a monitoring device (45a) that receive the signal r from the radiation dose rate meter (35) via the communication device (41) and display or monitor the signal, respectively. (45b) and (45c) are provided, and furthermore, a temperature display (46a), an alarm (47a), and a humidity display (47a) are connected to these monitoring devices, respectively.
46b) and an alarm (471)L, as well as a radiation dose rate indicator (46c) and an alarm (47C).

The radiation dose rate signal r from the communication device (41) is also input to the integrator (50), and this output signal and the equipment resistance data stored in the equipment mounted on the inspection vehicle (3) are also input to the integrator (50). A comparator (52) compares the output signal of the radiation data memory (51), and based on the comparison result, a device replacement request indicator (53) generates a signal requesting device replacement.

Next, the operation will be explained.

The operator operated the control panel (42) on the control panel (4) to drive the inspection vehicle (3) around the mole rail (1L) installed in the nuclear power plant, and the inspection vehicle (3) Each auxiliary signal sent from inspection equipment (TV camera, microphone, temperature sensor, and humidity sensor) and radiation dose rate meter (35) through communication devices (36) and (41) is transmitted to a monitor TV ( 43), speaker (44), temperature indicator (46a), humidity indicator (46)
b), and monitored by a radiation dose rate indicator (48c);
Perform inspection. In addition, regarding temperature, humidity, and radiation dose rate of environmental radiation intensity, known monitoring devices (45a) and (4
Normal automatic monitoring is performed at 513) and (45c), and when a certain value is exceeded, an alarm (47a) is activated.
, (47b) and (47c).

On the other hand, the radiation dose rate signal r from the radiation dose rate meter (35) to the integrator (50) is integrated by the integrator (50) and sent to the comparator (41). The data is compared with the contents of the memory (42) storing the data.

This radiation resistance usage limit data is measured and stored in advance for each device through radiation irradiation tests, etc., so if the output of the integrator (50) exceeds this stored value, a request for device replacement is requested. The display (53) issues a signal requesting equipment replacement and notifies the operator. The operator shall replace the equipment in accordance with this notice,
Manually reset the totalizer (50).

These operations may be performed by comparing the cumulative radiation #ii amount rate with the data that matches the inspection equipment with the lowest radiation level among the stored radiation tolerance usage limit data, or by using the inspection vehicle ( 3) According to the inspection equipment installed in
By preparing radiation resistance usage limit data and performing integration and comparison operations individually by switching the memory (51), detailed replacement requests can be made to the operator, allowing efficient maintenance. becomes. In the above embodiment, an integrator (50) that integrates the output of the radiation dose rate meter (35) is used.
) is configured to be installed in the operation panel (4), but it may also be installed in the inspection vehicle (3). In this case, the radiation dose rate meter (35) and integrator ( 50
) is supplied with power from the power supply (38) and the radiation weight rate integration operation is continued at all times.
8. Radiation exposure from inspection equipment can also be integrated,
More accurate monitoring will be possible.

[Effect of the Invention 1 As described above, 1. According to the mobile inspection device of the present invention, the output of the radiation #iI amount rate meter mounted on the inspection vehicle is constantly integrated and the output is stored in advance. By comparing the radiation resistance data of inspection equipment and requesting replacement of the inspection equipment if it exceeds this data, accurate maintenance becomes possible and it is possible to avoid situations such as breakdowns during use. There is.

[Brief explanation of drawings]

The drawing is a block diagram showing a mobile inspection device according to an embodiment of the present invention. 3--Inspection vehicle, 4--Operation panel, 31--TV camera,
32-1 micro 7 on, 33-1 temperature sensor, 34-
- Humidity sensor, 35 - Radiation dose rate meter, 50 - Integrator, 51 - Memory, 52 - Comparator, 53 - Component replacement request indicator

Claims (8)

[Claims] (1) In a mobile inspection device in which nuclear power plant inspection equipment is mounted on an inspection vehicle and inspected while traveling in a radiation environment under control from a remote location, the radiation amount is determined from the environmental radiation intensity of the inspection equipment. a first means for constantly detecting and integrating the rate; a memory for storing radiation resistance usage limit data of the inspection equipment; and a memory for storing the radiation resistance use limit data of the inspection equipment; A mobile inspection device comprising: second means for generating a device replacement request signal. (2) The mobile inspection device according to claim 1, wherein the inspection equipment is a television camera, a microphone, a temperature sensor, and a humidity sensor. (3) The mobile type according to claim 1 or 2, wherein the first means comprises a radiation dose rate meter and an integrator that integrates the output of the radiation dose rate meter. Inspection equipment. (4) The mobile inspection device according to any one of claims 1 to 3, wherein the first means is mounted on the inspection vehicle. (5) The mobile inspection device according to claim 3, wherein the radiation dose rate meter is mounted on the inspection vehicle, and the integrator is installed at the remote location. (6) The mobile inspection device according to any one of claims 1 to 5, wherein the memory is capable of reading radiation resistance usage limit data of any of the inspection equipment. (7) The mobile inspection device according to any one of claims 1 to 5, wherein the memory is capable of reading data with the lowest radiation resistance use limit of the inspection equipment. (8) The mobile inspection device according to claim 4, wherein the first means is always energized.