JP2012107897A - Treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treatment apparatus that exchanges atmosphere in a case thereof for outside air and is capable of easily determining the presence or absence of radiation contamination inside the treatment apparatus.SOLUTION: A treatment apparatus 1 comprises treatment means 11 for performing treatment according to an input operation, a case 21, a suction port 22 formed in the case 21, and an exhaust port 23 formed in the case 21. A voltage generator 1, which is the treatment apparatus 1, cools the inside thereof by ventilation. The voltage generator 1 has a first filter 51 that covers the exhaust port 23 and is detachably attached to the case 21. The first filter 51 collects foreign matter in the atmosphere passing through the exhaust port 23.

Description

  The present invention relates to a processing apparatus that performs internal cooling by ventilating an atmosphere in a housing with outside air by a fan.

When equipment brought into the radiation control area of a nuclear power plant is taken out to a radiation non-control area, it is necessary to confirm that the equipment taken out is not radioactively contaminated.
Then, when taking out an apparatus from a radiation control area, the presence or absence of the radioactive contamination in an apparatus is checked with a radioactivity measuring apparatus (for example, refer patent document 1).

  However, there are not a few devices that are brought into the radiation control area to perform internal cooling by ventilating the atmosphere in the housing with the outside air using a fan. For example, a voltage generator, a voltmeter, a voltmeter, a pressure measuring device, etc. can be mentioned as such a processing apparatus.

Japanese Patent Laid-Open No. 10-288667

  By the way, when a processing device that ventilates the air inside the housing with the outside air by a fan and performs internal cooling is used in the radiation management area, if the outside air flowing into the device contains radioactive contaminants, Radioactive contaminants in the outside air that have flowed into the apparatus adhere to circuit boards and the like inside the apparatus, and the inside of the apparatus becomes contaminated.

  However, the radioactivity measuring apparatus normally used for checking radioactivity contamination measures the radioactivity contamination on the object surface, and cannot measure the contamination inside the housing.

  Therefore, when taking out the processing device that ventilates the air inside the housing with the outside air by a fan from the radiation control area, disassemble the processing device housing and open the inside to remove the radioactive contamination inside. Contamination detection methods to check can also be considered. However, disassembling and reassembling of the housing is not only very troublesome, but also may cause the contamination to diffuse when internal contamination occurs, and cannot be carried out in practice. In addition, if the casing is disassembled, the accuracy of the processing apparatus may not be guaranteed.

  For this reason, a processing device that ventilates the air inside the housing with outside air using a fan cannot be checked for internal radioactive contamination once it is used in a radiation control area. However, it cannot be taken out of the radiation control area, and in the worst case, there has been a problem that an expensive device has to be made disposable.

  Therefore, the present invention provides a processing apparatus and an internal contamination detection method that can easily check for the presence or absence of internal radioactive contamination in a processing apparatus that ventilates the air inside the housing with outside air using a fan. With the goal.

(1) The present invention includes a processing unit that executes processing according to an input, a housing that houses the processing unit,
A processing apparatus comprising an intake port formed in the housing and an exhaust port formed in the housing, the processing device covering the exhaust port and detachably attached to the housing, wherein the exhaust port It is related with the processing apparatus provided with the 1st soot material which collects the foreign material in the gas which passes.

  (2) Further, in the case of the processing apparatus according to (1) above, the foreign matter in the outside air that covers the air inlet and is detachably attached to the housing and flows into the housing from the air inlet. It is preferable to further include a second dredging material that collects.

  (3) In the case of the processing apparatus according to (2) above, a first filter in which smear paper is housed in a support frame that can be attached to and detached from the housing is adopted as the first saddle material, It is preferable to employ a second filter in which a HEPA filter is housed in a support frame that is detachable from the casing.

(4) Moreover, this invention is an internal contamination detection method which detects the presence or absence of the radioactive contamination in the inside of the housing | casing of the processing apparatus in any one of said (1)-(3),
When the first filter medium removed from the housing is inspected for radioactivity contamination by a radioactivity measuring device for measuring radioactive contamination on the surface of the object, and the first filter medium is contaminated with radioactivity, The present invention relates to an internal contamination detection method for determining that there is radioactive contamination inside the body.

  According to the present invention, there is provided a processing apparatus capable of easily checking the presence or absence of internal radioactive contamination, and an internal contamination detection method in a processing apparatus that ventilates the air inside the housing with the outside air by a fan. Can do.

It is a schematic block diagram of the voltage generator as one Embodiment of the processing apparatus of this invention. It is a perspective view which shows schematic structure of the 1st filter with which the processing apparatus shown in FIG. 1 was equipped. It is explanatory drawing of the internal contamination detection method which checks the radioactive contamination inside the processing apparatus shown in FIG.

Hereinafter, a processing apparatus and an internal contamination detection method according to an embodiment of the present invention will be described with reference to the drawings.
First, the configuration of a voltage generator which is an embodiment of a processing apparatus according to the present invention will be described with reference to FIGS.

  A voltage generator 1 shown in FIG. 1 is a device that generates a voltage necessary for the operation of an external device such as another measuring device, and is used as a power source of the external device.

  The voltage generator 1 is disposed in a voltage generation processing circuit 11 that is a processing means for generating a voltage, a casing 21 that houses the voltage generation processing circuit 11, and a front surface portion 21 a that is one side surface of the casing 21. And a fan 41 for ventilating the internal atmosphere of the casing 21. The voltage generator 1 of this embodiment is a device that performs internal cooling by ventilation with a fan 41.

  The voltage generation processing circuit 11 includes, for example, a bracket 12 fixed in the housing 21, a circuit board 13 fixed to the bracket 12, and various circuit components 14 mounted on the circuit board 13. Is done. The voltage generation processing circuit 11 executes a process according to an input of either an input setting from the operation unit 31 or a signal input from the outside to an input terminal (not shown) provided in the housing 21, A desired voltage to be supplied to the external device is generated. The voltage generated by the voltage generation processing circuit 11 is output to an output terminal (not shown) provided in the housing 21 and supplied to a corresponding measuring device or the like.

The casing 21 is a box-shaped structure that defines a housing space 20 that houses the voltage generation processing circuit 11, and an air inlet 22 and an air outlet 23 are formed through it to ventilate the internal atmosphere. Yes.
The intake port 22 and the exhaust port 23 may have either a configuration in which several small-diameter ventilation holes are arranged as appropriate or a configuration in which one large opening is formed.

  The operation unit 31 includes a plurality of switches 31 a for setting operation conditions and the like of the voltage generation processing circuit 11, and can set a voltage value generated by the voltage generation processing circuit 11.

The fan 41 is attached in the housing 21 so as to face the exhaust port 23. The fan 41 takes outside air into the casing 21 from the intake port 22 and exhausts the atmosphere inside the casing to the outside of the casing 21 through the exhaust port 23 to ventilate the casing 21.
An arrow F shown in FIG. 1 indicates the flow of outside air that passes through the housing 21 by the fan 41.

  The voltage generator 1 according to the present embodiment includes a first filter 51 as a first rod material and a second filter 61 as a second rod material.

  The first filter 51 covers the exhaust port 23 from the outside of the housing 21. Further, as shown in FIG. 2, the first filter 51 has a structure in which a smear paper 53 is housed in a support frame 52 that can be attached to and detached from the housing 21, and can be attached to and detached from the housing 21 through the support frame 52. It is attached.

  A specific structure for detachably attaching the support frame 52 to the housing 21 is, for example, a peripheral portion of the exhaust port 23 of the housing 21 with which the support frame 52 abuts and a contact of the support frame 52 with which the peripheral portion abuts. An engagement mechanism that engages with each other may be provided on the surface, or the support frame 52 may be attracted to the housing 21 by the magnetic force of a magnet.

  The smear paper 53 is a specification conforming to the provisions of JIS-Z-4504-1993 (a method for measuring radioactive surface contamination), and easily adheres to radiation contaminants, has high retention, and serves as a filter. Those having ventilation performance are selected.

  The first filter 51 collects foreign matter in the atmosphere passing through the exhaust port 23 by the blowing force of the fan 41.

  The second filter 61 covers the air inlet 22 from the outside of the housing 21. The second filter 61 has a structure in which a HEPA filter is housed in a support frame (not shown) that can be attached to and detached from the housing 21 and is detachably attached to the housing 21 through the support frame.

The support frame that accommodates the HEPA filter is the same as the support frame 52 shown in FIG. 2, and supports the HEPA filter in a plate shape that covers the intake port 22.
The second filter 61 collects foreign matter in the outside air that flows into the housing 21 from the air inlet 22.

Next, an internal contamination detection method for detecting the presence or absence of radioactive contamination in the casing 21 of the voltage generator 1 will be described with reference to FIG.
In FIG. 3, reference numeral 71 is a radioactivity measuring device 71 for measuring radioactive contamination on the surface of an object, and reference numeral 72 is a radioactivity detector 72 connected to the radioactivity measuring device 71. The radioactivity measuring device 71 can measure the degree of radioactivity contamination on the surface of the object by bringing the tip surface 72a of the radioactivity detector 72 close to the surface of the object to be measured to a specified distance.

  In the internal contamination detection method of the present embodiment, as shown in FIG. 3, the tip surface 72 a of the radioactivity detector 72 is brought close to the surface of the first filter 51 removed from the housing 21, and the radioactivity in the first filter 51 is detected. Inspect for contamination. And when it turns out that the 1st filter 51 has radioactive contamination, it determines with there being radioactive contamination in the housing | casing 21. FIG.

  The voltage generator 1 of the present embodiment described above includes a voltage generation processing circuit 11 that executes processing according to input, a casing 21 that houses the voltage generation processing circuit 11, and an intake port formed in the casing 21. 22, an exhaust port 23 formed in the housing 21, and a fan 41 that exhausts the atmosphere in the housing to the outside of the housing 21 through the exhaust port 23 to ventilate the inside of the housing 21. A voltage generator that performs internal cooling by ventilation, and includes a first filter 51 that covers the exhaust port 23 and is detachably attached to the housing 21 and collects foreign substances in the atmosphere passing through the exhaust port 23. .

Therefore, the voltage generator 1 radiates the presence or absence of radioactive contamination in the first filter 51 removed from the housing 21, as shown in FIG. By performing the internal contamination detection method inspected by the performance measuring device 71, it is possible to easily detect the presence or absence of internal contamination without disassembling the casing 21 and exposing the interior.
Therefore, it is possible to provide the voltage generator 1 that can easily check the presence or absence of internal radioactive contamination.
As a result, it can be confirmed that the voltage generator 1 to be taken out is not radioactively contaminated, and it can be taken out to a radiation non-control area, and since the internal radioactive contamination cannot be checked, expensive equipment must be made disposable. The inconvenience that must be solved can be solved.

In addition, the voltage generator 1 of the present embodiment covers the air inlet 22 and is detachably attached to the housing 21, and collects foreign matter in the outside air flowing into the housing 21 from the air inlet 22. A filter 61 is provided.
Therefore, for example, when a radioactive pollutant exists as foreign matter in the outside air flowing into the housing 21 from the air inlet 22, the second filter 61 collects the radioactive pollutant, thereby causing the radioactive contamination. It is possible to prevent the substance from entering the housing 21 itself, and to prevent the contamination in the housing 21 or reduce the contamination.

  When the second filter 61 is provided, the second filter 61 is also removed from the housing 21 and checked for radioactivity contamination by the radioactivity measuring device 71 as shown in FIG. Thereby, the detection precision of the presence or absence of radioactive contamination in the housing | casing 21 can be improved.

In the case of the voltage generator 1 of the present embodiment, the first filter 51 has a configuration in which a smear paper 53 is housed in a support frame 52 that can be attached to and detached from the housing 21 as shown in FIG. The two filters 61 are configured such that a HEPA filter is housed in a support frame that can be attached to and detached from the housing 21.
The first filter 51 and the second filter 61 are excellent in the collection and retention of radioactively contaminated fine particles.
Therefore, to improve the reliability of the internal contamination detection method of this embodiment in which the first filter 51 and the second filter 61 removed from the casing 21 are checked for the presence or absence of radioactive contamination by the radioactive measuring device 71. Can do.

  In addition, the specific brazing material employ | adopted as the 1st filter 51 and the 2nd filter 61 in the processing apparatus which concerns on this invention is not restricted to what was shown to the said embodiment. For example, it is also conceivable to employ a HEPA filter for the brazing material of both the first filter 51 and the second filter 61, or to employ a ULPA filter having a particle collection rate superior to that of the HEPA filter.

Furthermore, the processing apparatus according to the present invention is not limited to the voltage generator shown in the above embodiment. That is, the present invention may be applied to an ammeter, a voltmeter, a pressure measuring device (manometer), a current generator, and the like.
In the present embodiment, the present invention is applied to a processing apparatus that performs internal cooling by ventilating the atmosphere in the housing with the outside air using a fan. However, the present invention is not limited to this. That is, the present invention may be applied to a natural circulation type processing apparatus that cools the inside of the housing without using a fan.

1 Voltage generator (processing device)
11 Voltage generation processing circuit (processing means)
21 Housing 22 Intake port 23 Exhaust port 41 Fan 51 First filter (first saddle member)
61 Second filter (second rod)
71 Radioactivity measuring device 72 Radioactivity detector

Claims (4)

Processing means for executing processing according to the input;
A housing that houses the processing means;
An air inlet formed in the housing;
An exhaust port formed in the housing;
A processing apparatus comprising:
A processing apparatus comprising a first dredger that covers the exhaust port and is detachably attached to the housing and collects foreign substances in the gas passing through the exhaust port.   2. The second saddle member according to claim 1, further comprising a second saddle member that covers the intake port and is detachably attached to the housing and collects foreign matters in the outside air flowing into the housing from the intake port. Processing equipment.   The first saddle material employs a first filter containing smear paper on a support frame that is detachable from the housing, and the second saddle material is provided with a HEPA filter on a support frame that is detachable from the housing. The processing apparatus of Claim 2 which employ | adopted the stored 2nd filter. An internal contamination detection method for detecting the presence or absence of radioactive contamination inside the housing of the processing apparatus according to any one of claims 1 to 3,
Inspecting the presence or absence of radioactive contamination in the first brazing material removed from the housing by the radioactivity measuring device for measuring radioactive contamination on the surface of the object, and when the first brazing material has radioactive contamination, An internal contamination detection method for determining that radioactive contamination is present inside the housing.

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