Movable radioactive iodine continuous monitor and detection device

Abstract

The utility model discloses a movable radioactive iodine continuous monitor and detection device, and belongs to the technical field of nuclear facilities and air detection. According to the movable radioactive iodine continuous monitor, the reliability and the accuracy of detection data are improved by arranging the detection device, the detector can conveniently monitor at different places by designing the main wheels, and the working efficiency is improved. According to the detection device, the size of the iodine box is set to be consistent with the size of the probe of the NaI detector, so that the NaI detector can monitor radioactive iodine in air more comprehensively, the reliability of a monitoring result is improved, and resource waste caused by the fact that the arranged probe is too large is avoided. By using the lead chamber, external interference is effectively shielded, and the accuracy of monitoring data is improved. And more accurate radioactive activity concentration data can be provided through a multichannel analyzer. The problem that the monitoring result of an existing monitor is unreliable due to the defect of incomplete monitoring is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to nuclear facility field air detection technical field, specifically relates to a mobile radioactive iodine continuous monitor and detection device. BACKGROUND

[0002] Real -time monitoring nuclear facility exhaust gas is one of the key points of nuclear facility safety work;Radioactive nuclide I-131 is fission product, has the characteristics such as high yield, easy to evaporate, in addition I-131 also belongs to the nuclide of toxic group, easy to be inhaled by human body;Therefore must guarantee the quality of the environment air of the area where staff is located, therefore through radioactive iodine monitor realizes the monitoring of air, when unqualified air appears, timely through effective means to interfere.

[0003] The working process of the existing detector is as follows: first, the surrounding air is sucked into the detection device by a pump, and I-131 is deposited on the activated carbon in the box when flowing through the activated carbon iodine box;The detector obtains the 364keV energy gamma ray data emitted by the deposited I-131 nuclide, and determines the concentration of radioactive iodine in the air by the gamma ray data. Since the I-131 deposited in the existing iodine box is uneven, and the detector probe only corresponds to a part of the iodine box, the detector probe cannot comprehensively obtain the actual situation of the deposited iodine in the iodine box.

[0004] In summary, the existing monitor has the defect of incomplete monitoring, which leads to unreliable monitoring results of the monitor. INVENTION CONTENTS

[0005] The utility model wants to solve the technical problem in the prior art, provide a mobile radioactive iodine continuous monitor and detection device, and it is novel and reasonable in design, high in reliability, good in safety and convenient to use.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of:

[0007] A detection device, comprising a lead chamber, the lead chamber is sequentially placed with an iodine box, a NaI detector with a photomultiplier tube and a multichannel analyzer from top to bottom in the lead chamber;

[0008] The lead chamber is provided with an air inlet above, the lead chamber side wall between the iodine box and the NaI detector is provided with an air outlet, the iodine box is connected with the lead chamber inner wall through a mounting piece, and the outer diameter of the mounting piece is equal to the inner diameter of the lead chamber;

[0009] The size of the iodine box is consistent with the size of the probe of the NaI detector;The NaI detector is used for obtaining the radioactivity of radioactive iodine in the iodine box;The multichannel analyzer is connected with the data transmission of the NaI detector, and the multichannel analyzer is used for outputting the radioactivity concentration of gamma rays;

[0010] The lead chamber side wall below the multi-channel analyzer is provided with a plurality of multi-channel communication line outlets for the multi-channel analyzer communication line to extend out.

[0011] Further, the lead chamber outer wall is provided with a plurality of fixing members for fixing the lead chamber.

[0012] Further, the lead chamber comprises a lead chamber body, an upper cover and a lower cover, one end of the lead chamber body is connected with the upper cover, and the other end is connected with the lower cover.

[0013] Further, the thickness of the lead chamber ranges from 4cm to 7cm.

[0014] The utility model discloses a mobile radioactive iodine continuous monitor, including frame, air pump, on -the -spot processor, electrical box, the detection device of above, air pump, detection device, on -the -spot processor, electrical box are fixedly installed in frame, the frame below both sides are equipped with a main wheel, for supporting frame and make it can move on the ground,

[0015] The air pump is communicated with the air inlet of the detection device through the air inlet pipeline, and is used for extracting the air in the monitoring area.

[0016] The on-the-spot processor is connected with the multi-channel analyzer communication line of the detection device, and is used for displaying the radioactivity concentration data of gamma rays and sending an alarm signal.

[0017] The electrical box is used for power distribution for electrical equipment.

[0018] Further, the air inlet pipeline is provided with an adjusting valve and a flowmeter, the adjusting valve is used for adjusting the flow of air, and the flowmeter is used for observing the flow rate of air.

[0019] Further, the air inlet pipeline is provided with a filter for filtering out the particles with large particle size.

[0020] Further, the on-the-spot processor is further connected with an alarm device for warning according to the alarm signal.

[0021] Further, the rear upper portion of the frame is further provided with an auxiliary wheel, and the auxiliary wheel cooperates with the two main wheels to provide additional support when the frame is inclined to a certain angle.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] The utility model discloses a detection device through the size of iodine box and the probe size of NaI detector setting is identical, guarantees NaI detector enough more comprehensive monitoring radioactive iodine in the air, improved the reliability of monitoring result, and will not because the probe of setting is too big, lead to the waste of resources. Through using lead room, effectively shield outside interference, improve the accuracy of monitoring data, simultaneously, the application of this multichannel analyzer can provide more accurate radioactivity concentration data, solve the defect of the current monitoring appearance because of not comprehensive monitoring, lead to the monitoring result of monitoring appearance unreliable problem.

[0024] The utility model discloses a mobile radioactive iodine continuous monitoring appearance, through setting detection device to improve the reliability and accuracy of detection data, through the design main wheel, make this detection appearance can conveniently monitor at different places, improve work efficiency.

[0025] Below through the drawing and embodiment, the technical scheme of the utility model is further detailed. DRAWINGS

[0026] Figure 1 It is the cross section structure schematic drawing of the detection device embodiment of the utility model,

[0027] Figure 2 It is the structure schematic drawing of the mobile radioactive iodine continuous monitoring appearance embodiment of the utility model, and the figure mark explanation:

[0028] 01, detection device, 011, iodine box, 012, mounting piece, 013, NaI detector,

[0029] 014, multichannel analyzer, 015, air inlet, 016, air outlet, 017, multichannel communication line outlet, 018, fixing piece, 019, lead room, 0191, lead room body, 0192, upper cover, 0193, lower cover,

[0030] 02, frame, 03, air pump, 04, main wheel, 05, auxiliary wheel, 06, regulating valve, 07, flowmeter, 08, filter, 09, on -the -spot processor, 10, alarm device, 11, electrical box. DETAILED DESCRIPTION

[0031] Mobile radioactive iodine continuous monitoring appearance embodiment:

[0032] As Figure 1 , Figure 2As shown, a mobile radioactive iodine continuous monitor includes a frame 02, an air pump 03, an on-site processor 09, an electrical box 11, and a detection device 01. The air pump 03, the detection device 01, the on-site processor 09, and the electrical box 11 are all fixedly mounted on the frame 02. A main wheel 04 is installed on each side of the lower side of the frame 02 for supporting the frame 02 and enabling it to move on the ground.

[0033] To improve the accuracy of detection data from detection device 01, it includes a lead chamber 019, which contains, from top to bottom, an iodine cartridge 011, a NaI detector with a photomultiplier tube 013, and a multichannel analyzer 014. Specifically, an air inlet 015 is located above lead chamber 019, and an air outlet 016 is located on the sidewall of lead chamber 019 between iodine cartridge 011 and NaI detector 013. Iodine cartridge 011 is connected to the inner wall of lead chamber 019 via a mounting member 012, the outer diameter of which is equal to the inner diameter of lead chamber 019. This arrangement of air inlet 015 and air outlet 016 ensures that incoming air must pass through iodine cartridge 011 before exiting, improving the adsorption efficiency of iodine cartridge 011. The photomultiplier tube in NaI detector 013 is a CR173, and the NaI detector crystal is 50 mm x 50 mm. Multichannel analyzer 014 utilizes a 4096-channel analyzer.

[0034] In order to ensure that the NaI detector 013 can fully obtain the situation in the iodine box 011, the size of the iodine box 011 is consistent with the probe size of the NaI detector 013; the above-mentioned NaI detector 013 is used to obtain the radioactive activity of the radioactive iodine in the iodine box 011; the above-mentioned multi-channel analyzer 014 is connected to the NaI detector 013 for data transmission, and the above-mentioned multi-channel analyzer 014 is used to output the radioactive activity concentration of gamma rays.

[0035] In order to facilitate the extension of the communication lines inside the lead chamber 019, a multi-channel communication line outlet 017 is opened on the side wall of the lead chamber 019 below the multi-channel analyzer 014 for the extension of the communication lines of the multi-channel analyzer 014.

[0036] In order to facilitate the fixing of the lead chamber 019 on the detector, the outer wall of the lead chamber 019 is provided with a plurality of fixing members 018 for fixing the lead chamber 019. The fixing members 018 can be clamps, bolts, screws and nuts, etc., as long as they can achieve fixation.

[0037] In order to facilitate the assembly of the detection device 01, the lead chamber 019 includes a lead chamber body 0191, an upper cover 0192 and a lower cover 0193. One end of the lead chamber body 0191 is connected to the upper cover 0192, and the other end is connected to the lower cover 0193.

[0038] In order to guarantee the shielding effect of the lead room 019, the thickness of the lead room 019 ranges from 4cm to 7cm, so as to guarantee the detection performance of the NaI detector 013 in the lead room 019.

[0039] In order to guarantee the efficiency of air intake and air exhaust, the air pump 03 is communicated with the air inlet 015 of the detection device 01 through an air inlet pipeline, and is used for extracting air in the monitoring area. The air pump is also communicated with the air inlet 015 and the air outlet 016 of the detection device 01 through an air outlet pipeline, and is used for extracting air from the air outlet 016. In order to facilitate observation of the air intake amount, an adjusting valve 06 and a flow meter 07 are installed on the air inlet pipeline. The adjusting valve 06 is used for adjusting the flow of air intake, and the flow meter 07 is used for observing the flow rate of air intake. That is, according to the data on the flow meter 07, it is determined whether the air intake amount needs to be adjusted. When adjustment is needed, the air intake amount is adjusted by controlling the adjusting valve 06.

[0040] In order to guarantee the safety of the detection equipment, a filter 08 is arranged on the air inlet pipeline, which is used for filtering out particles with large particle size, so as to prolong the service life of the detection equipment. By arranging the adjusting valve 06, the flow meter 07 and the filter 08, the safety of the monitoring process and the accuracy of the data can be ensured.

[0041] In order to facilitate observation of the radioactivity concentration data of γ rays in the current air, the on-site processor 09 is connected with the communication line of the multichannel analyzer 014 of the detection device 01, which is used for displaying the radioactivity concentration data of γ rays and sending an alarm signal. That is, the on-site processor 09 obtains the data analyzed by the multichannel analyzer 014 through connection with the multichannel analyzer 014, displays the data through the on-site processor 09, and sends an alarm signal when the analyzed data exceeds the set safety value, so as to warn the staff. The on-site processor 09 is also connected with an alarm device 10, which is used for warning according to the alarm signal. The alarm device 10 can be light alarm or sound alarm, which can be set according to actual needs. The combination of the on-site processor 09 and the alarm device 10 can send a warning in time when unqualified air is monitored, so as to guarantee the safety of the staff.

[0042] In order to facilitate unified management of the electrical equipment, the electrical box 11 is used for power distribution for the electrical equipment.

[0043] In order to facilitate movement of the detection instrument, auxiliary wheels 05 are also installed on the upper rear of the vehicle frame 02, which work cooperatively with the two main wheels 04. When the vehicle frame 02 is inclined to a certain angle, the auxiliary wheels 05 are used for providing additional support. The detection instrument can continuously monitor the radioactive iodine in the air, which is of great significance for safety monitoring of nuclear facilities, especially in guaranteeing the air quality of the environment in the area where the staff is located.

[0044] Detection device embodiment:

[0045] like Figure 1 As shown, detection device 01 includes a lead chamber 019, which contains, from top to bottom, an iodine cartridge 011, a NaI detector with a photomultiplier tube 013, and a multichannel analyzer 014. An air inlet 015 is located above lead chamber 019, and an air outlet 016 is located on the sidewall of lead chamber 019 between iodine cartridge 011 and NaI detector 013. Iodine cartridge 011 is connected to the inner wall of lead chamber 019 via a mounting member 012, the outer diameter of which is equal to the inner diameter of lead chamber 019. The dimensions of iodine cartridge 011 match those of the probe of NaI detector 013. NaI detector 013 is used to obtain the radioactive iodine activity in iodine cartridge 011. Multichannel analyzer 014 is connected to NaI detector 013 for data transmission and outputs the radioactive activity concentration of gamma rays. The side wall of the lead chamber 019 below the multi-channel analyzer 014 is provided with a multi-channel communication line outlet 017 for extending the communication lines of the multi-channel analyzer 014. This embodiment is implemented with reference to the above-mentioned embodiment of the mobile radioactive iodine continuous monitor, and will not be described in detail here.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A detection device, characterized by: The lead chamber (019) is provided with an iodine box (011), a NaI detector (013) with a photomultiplier tube and a multichannel analyzer (014) arranged in the lead chamber (019) from top to bottom; The lead chamber (019) is provided with an air inlet (015) on the top, and the sidewall of the lead chamber (019) between the iodine box (011) and the NaI detector (013) is provided with an air outlet (016); the iodine box (011) is connected to the inner wall of the lead chamber (019) through a mounting piece (012), and the outer diameter of the mounting piece (012) is equal to the inner diameter of the lead chamber (019); The size of the iodine box (011) is consistent with the probe size of the NaI detector (013); the NaI detector (013) is used to obtain the radioactivity of the radioactive iodine in the iodine box (011); the multichannel analyzer (014) is in data transmission connection with the NaI detector (013), and the multichannel analyzer (014) is used to output the radioactivity concentration of gamma rays; The sidewall of the lead chamber (019) below the multichannel analyzer (014) is provided with a multichannel communication line outlet (017) for the communication line of the multichannel analyzer (014) to extend out.

2. A probe device according to claim 1, characterised in that: The outer wall of the lead chamber (019) is provided with a plurality of fixing pieces (018) for fixing the lead chamber (019).

3. A probe device according to claim 1, characterised in that: The lead chamber (019) comprises a lead chamber body (0191), an upper cover (0192) and a lower cover (0193), one end of the lead chamber body (0191) is connected with the upper cover (0192), and the other end is connected with the lower cover (0193).

4. A probe device according to claim 1, characterised in that: The thickness of the lead chamber (019) ranges from 4cm to 7cm.

5. A mobile continuous monitor for radioiodine, characterized in that: The device comprises a frame (02), an air pump (03), an on-site processor (09), an electrical box (11) and the detection device (01) of any one of claims 1-4, the air pump (03), the detection device (01), the on-site processor (09) and the electrical box (11) are fixedly installed on the frame (02), and each side of the lower part of the frame (02) is provided with a main wheel (04) for supporting the frame (02) and enabling it to move on the ground; The air pump (03) is in communication with the air inlet (015) of the detection device (01) through an air inlet pipeline, and is used to extract air in the monitoring area; the air pump is also in communication with the air inlet (015) and the air outlet (016) of the detection device (01) through an air outlet pipeline, and is used to extract air from the air outlet (016); The on-site processor (09) is connected with the communication line of the multichannel analyzer (014) of the detection device (01), and is used to display the radioactivity concentration data of gamma rays and send an alarm signal; The electrical box (11) is used for power distribution for electrical equipment.

6. A mobile continuous monitor for radioiodine according to claim 5, characterized in that: An adjusting valve (06) and a flow meter (07) are installed on the air inlet pipeline, the adjusting valve (06) is used to adjust the flow of air, and the flow meter (07) is used to observe the flow rate of air.

7. A mobile continuous monitor for radioiodine as defined in claim 5, characterized in that A filter (08) is arranged on the air inlet pipeline for filtering out particles with large particle size.

8. A mobile continuous monitor for radioiodine according to claim 5, characterized in that: The on-site processor (09) is also connected with an alarm device (10) for warning according to the alarm signal.

9. The mobile continuous monitor for radioiodine according to claim 5, wherein: The rear upper part of the frame (02) is also provided with auxiliary wheels (05), which work in cooperation with the two main wheels (04) and provide additional support when the frame (02) is tilted to a certain angle.

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