CN111175807B - Automatic large-scale total gamma analyzer system - Google Patents

Abstract

The invention belongs to the technical field of spent fuel reprocessing, and in particular relates to an automatic mass total gamma analyzer system for measuring the gamma rays of radioactive samples to be tested in a sample distribution table, including an automatic mass spectrometer equipped with a pneumatic sample delivery system Total Gamma Analyzer, Pneumatic Sample Feeding System is used to transfer the sample to be tested from the sample distribution station to the Automatic Mass Total Gamma Analyzer; the Automatic Mass Total Gamma Analyzer is used to obtain and analyze the gamma ray spectrum of the sample to be tested, And output the analysis results of the gamma ray spectrum, and also used to control the transmission of the sample by the pneumatic sample delivery system. The sample to be tested can be directly measured without pretreatment; the analysis process is simple, efficient and fast; the sample to be tested can be recycled; automatic acquisition of sample information, automatic sending and receiving of running rabbit bottles, and automatic measurement of samples to be tested can be realized , and finally realize unattended automatic analysis, which greatly reduces the labor intensity and dose of the staff, and greatly improves the work efficiency.

Description

An Automatic Mass Total Gamma Analyzer System

technical field

The invention belongs to the technical field of spent fuel reprocessing, in particular to an automatic mass total gamma analyzer system.

Background technique

Spent fuel, also known as irradiated nuclear fuel, is nuclear fuel that has been exposed to radiation and used, usually produced by the nuclear reactor of a nuclear power plant. Spent fuel reprocessing is the most critical link in the latter part of the nuclear fuel cycle, and it is the most extensive treatment method for spent fuel discharged from nuclear reactors. The spent fuel reprocessing plant usually adopts the PUREX process, which utilizes the high extractability of U(VI) and Pu(IV) by tributyl phosphate (TBP) and the easy redox properties of Pu to achieve U, U, and PU. The extraction and mutual separation of Pu mainly include uranium and plutonium co-decontamination cycle, uranium purification cycle and plutonium purification cycle. In the whole process, the total gamma measurement is one of the most important analysis items. It has the characteristics of many analysis points and high analysis frequency. At present, the gamma counting method is generally used for measurement. The operations such as taking and other operations are all done manually, which requires a lot of manpower and material resources. The staff is labor-intensive, low in efficiency, and there is a risk of the radiation dose exceeding the standard.

SUMMARY OF THE INVENTION

Based on the gamma counting analysis method developed in the early stage, the purpose of the present invention is to combine pneumatic sample feeding technology, automation technology and total gamma measurement technology to develop an automatic mass total gamma analyzer system to realize automatic acquisition of sample information, measurement of bottle Automatic sending and receiving, automatic measurement of samples, and finally unattended automatic analysis will greatly reduce the labor intensity and dose of staff, and greatly improve work efficiency and personnel safety.

In order to achieve the above purpose, the technical solution adopted in the present invention is an automatic mass total gamma analyzer system, which is used to measure the gamma rays of the radioactive samples to be tested in the sample distribution table. An automatic mass total gamma analyzer, the pneumatic sample feeding system is used to transmit the sample to be tested from the sample distribution table to the automatic mass total gamma analyzer; the automatic mass total gamma analyzer is used for Obtaining and analyzing the gamma ray spectrum of the sample to be tested, and outputting the analysis result of the gamma ray spectrum, and also used for controlling the conveying of the sample by the pneumatic sample feeding system.

Further, the automatic mass total gamma analyzer includes a control and analysis system connected to a detection system; the detection system is used to obtain the gamma ray spectrum; the control and analysis system is used to analyze the gamma ray spectrum And output the analysis result, and control the transmission of the sample to be tested by the pneumatic sample delivery system.

Further, the pneumatic sample delivery system is a PTN master station provided with a PTN transfer tube, and the PTN master station is set on the sample distribution table for receiving the The running rabbit bottle of the sample, and under the control of the control and analysis system, the running rabbit bottle is transported back and forth through the PTN transfer tube; the top of the PTN transfer tube is set on the PTN master station; The tail end of the PTN transmission tube is provided with a sample measurement base, and the sample measurement base is arranged at a position close to the detection system for the positioning and transmission of the running rabbit bottle; the sample measurement base is provided with Induction device, which can sense whether the running rabbit bottle is located in the sample measurement base, and send a corresponding in-position signal to the control and analysis system; PTN is the English abbreviation of Pneumatic Sample Feeding System.

Further, the PTN conveying tube conveys the running rabbit bottle by means of pneumatic conveying, and the sensing device is an optical fiber sensor.

Further, the detection system includes a NaI detector and a collimator, and also includes a shielding body arranged on the periphery of the NaI detector, and the sample to be tested in the running rabbit bottle in the sample measurement base emits After passing through the collimator, the gamma rays enter the NaI detector to form the gamma ray spectrum.

Further, the control and analysis system includes a PLC control system, an industrial computer and analysis software; the PLC control system is used for the logic control of the pneumatic sample feeding system, the detection system, the industrial computer and the analysis software, and also Including the interaction with the signal of the sample distribution station; the industrial computer and the analysis software are connected to the detection system for the acquisition, processing, calculation and analysis of the gamma ray spectrum, and the analysis result is obtained. The industrial computer and the analysis software are also connected to the sample information management system, and output the analysis results to the sample information management system.

Further, when the running rabbit bottle is transferred from the PTN main station to the sample measurement base, the sensing device sends the corresponding in-position signal, and the PLC control system receives the signal sent by the sample distribution station. After the sample information of the sample to be tested in the running rabbit bottle, the PLC control system can control the detection system, the industrial computer and the analysis software to control the sample to be tested in the running rabbit bottle. Obtain, process, calculate and analyze the gamma ray spectrum of the sample, obtain the analysis result, and output the analysis result to the sample information management system; , the PLC control system can control the pneumatic sample delivery system to transfer the running rabbit bottle in the sample measurement base after the industrial computer and the analysis software output the analysis result to the sample information management system transmitted back to the PTN master.

Further, the PLC control system, the industrial computer and the analysis software are arranged in an electric control cabinet.

Further, the PLC control system and the sample distribution station are connected through Ethernet.

Further, the industrial computer and the analysis software are connected with the sample information management system through a network cable.

The beneficial effects of the present invention are:

1. The automatic mass total gamma analyzer system combines pneumatic sample feeding technology, automation technology and gamma counting measurement technology to realize automatic acquisition of sample information, automatic sending and receiving of running rabbit bottles (ie measuring bottles), and detection of samples to be tested. Automatic measurement, and ultimately unattended, fully automatic analysis.

2. Auxiliary operation subsystems such as opening/closing the lid of the running rabbit bottle and transferring the sample to be tested are omitted.

3. Greatly reduce the labor intensity and dosage of the staff, and greatly improve the work efficiency.

4. The sample to be tested can be measured directly without pretreatment.

5. The analysis process is simple, efficient and fast.

6. The samples to be tested can be recycled.

Description of drawings

1 is a schematic diagram of the connection relationship between the automatic mass total gamma analyzer system and the sample distribution platform described in the specific embodiments of the present invention;

2 is a schematic diagram of the detection system described in the specific embodiment of the present invention, a sample measurement base and a running rabbit bottle;

3 is a schematic diagram of the connection relationship between the automatic mass total gamma analyzer and the sample information management system described in the specific embodiments of the present invention;

4 is a schematic diagram of the sample distribution table and the pneumatic sample delivery system described in the specific embodiment of the present invention (marked with a sample temporary storage area);

Middle: 1-sample distribution table, 2-PTN master station, 3-PTN transfer tube, 4-sample measurement base, 5-induction device, 6-running rabbit bottle, 7-automatic mass total gamma analyzer, 8-NaI Detector, 9-shield, 10-collimator, 11-PLC control system, 12-industrial computer and analysis software, 13-electric control cabinet, 14-network cable, 15-sample information management system, 16-sample temporary storage Area.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

As shown in FIG. 1, an automatic mass total gamma analyzer system provided by the present invention is used to measure the gamma rays of the radioactive sample to be tested in the sample distribution station 1, including a pneumatic sample feeding system and an automatic mass total gamma Horse Analyzer 7. The pneumatic sample feeding system is used to transfer the sample to be tested from the sample distribution station 1 to the automatic mass total gamma analyzer 7 . The automatic mass total gamma analyzer 7 is used to obtain and analyze the gamma ray spectrum of the sample to be tested, output the analysis result of the gamma ray spectrum, and also used to control the delivery of the sample to be tested by the pneumatic sample delivery system.

Among them, the automatic mass total gamma analyzer 7 includes a detection system and a control and analysis system (the two are connected), the detection system is used to obtain the gamma ray spectrum of the sample to be tested, and the control and analysis system is used to analyze the gamma ray spectrum and The analysis result is output, and the control and analysis system is also used to control the transmission of the sample to be tested by the pneumatic sample delivery system.

As shown in FIG. 1 , the pneumatic sample feeding system includes a PTN master station 2 , a PTN transfer tube 3 , and a sample measurement base 4 . The PTN master station 2 is located on the sample distribution table 1 and is used to receive the automatic machine on the sample distribution table 1 . The running rabbit bottle 6 containing the sample to be tested sent out by the arm, and under the control of the control and analysis system, the running rabbit bottle 6 is transported back and forth through the PTN transfer tube 3; the top of the PTN transfer tube 3 is located on the PTN master station 2. , the tail end of the PTN transmission tube 3 is provided with a sample measurement base 4, and the sample measurement base 4 is arranged at a position close to the detection system for the positioning and transmission of the running rabbit bottle 6; an induction device 5 is provided on the sample measurement base 4 , the sensing device 5 can sense whether there is a running rabbit bottle 6 in the sample measuring base 4, and send a corresponding in-position signal to the control and analysis system. The PTN conveying tube 3 conveys the running rabbit bottle 6 by means of pneumatic conveying. The sensing device 5 is an optical fiber sensor. PTN is the abbreviation of Pneumatic Transmit Network.

As shown in FIG. 2 , the detection system includes a NaI detector 8 , a shielding body 9 and a collimator 10 , and the shielding body 9 is arranged around the NaI detector 8 . The gamma rays emitted by the sample to be tested in the running rabbit bottle 6 in the sample measurement base 4 pass through the collimator 10 and then enter the NaI detector 8 to form a gamma ray spectrum. The collimator 10 is used for collimating gamma rays. The shielding body 9 is used to prevent stray light and stray scattered rays from entering the NaI detector 8 . The collimation hole of the collimator 10 and the incident hole of the NaI detector 8 should be coaxially aligned. Running Rabbit Bottle 6: This bottle serves as both a running rabbit bottle and a measuring bottle. When used as a running rabbit bottle, it can realize the transfer of the sample to be tested, and when used as a measuring bottle, it can realize the containment of the sample to be tested.

As shown in Figure 2, the control and analysis system includes a PLC control system 11, an industrial computer and analysis software 12; the PLC control system 11 is used for the logic control of the pneumatic sample feeding system and detection system, the industrial computer and the analysis software 12, and also includes and The interaction of the signals of the sample distribution station 1; the industrial computer and the analysis software 12 are connected to the detection system for the acquisition, processing, calculation and analysis of the gamma ray spectrum, and the analysis results are obtained, and the industrial computer and the analysis software 12 are also connected to the sample information management system. 15, and output the analysis results to the sample information management system 15. The PLC control system 11 , the industrial computer and the analysis software 12 are arranged in the electric control cabinet 13 . The PLC control system 11 and the sample distribution station 1 are connected through Ethernet.

When the running rabbit bottle 6 is transferred from the PTN main station 2 to the sample measurement base 4, the sensing device 5 sends a corresponding in-position signal, and the PLC control system 11 receives the sample to be tested in the running rabbit bottle 6 sent by the sample distribution station 1. After corresponding sample information, the PLC control system 11 can control the detection system, the industrial computer and the analysis software 12 to acquire, process, calculate and analyze the gamma ray spectrum of the sample to be tested in the running rabbit bottle 6, and obtain the analysis result, And output the analysis results to the sample information management system 15; when the running rabbit bottle 6 is located in the sample measurement base 4, the PLC control system 11 can control the pneumatic control after the industrial computer and the analysis software 12 output the analysis results to the sample information management system 15. The sample delivery system sends the running rabbit bottle 6 in the sample measurement base 4 back to the PTN master station 2 .

As shown in FIG. 3 , the automatic mass total gamma analyzer 7 and the sample information management system 15 are connected by a network cable 14 , specifically the industrial computer and the analysis software 12 in the automatic mass total gamma analyzer 7 and the sample information management system The systems 15 are connected through a network cable 14 .

Finally, the practical application of a kind of automatic mass total gamma analyzer system provided by the present invention is described:

1. Automatic delivery of samples to be tested

On the sample distribution station 1, the automatic robot arm grabs the running rabbit bottle 6 containing the sample to be tested for image recognition. According to the ID code of the sample to be tested, the server is queried to obtain the sample information of the sample to be tested, and then the automatic robotic arm sends the running rabbit bottle 6 to the pneumatic sample feeding system, and the transmission system sends the running rabbit bottle 6 containing the sample to be tested, Automatically sent from the PTN master 2 to the sample measurement base 4 located in the automatic bulk total gamma analyzer 7 . At the same time, the sample distribution station 1 sends the sample information to the automatic mass total gamma analyzer 7 through Ethernet communication.

2. Automatic measurement of samples to be tested

When the running rabbit bottle 6 containing the sample to be tested is sent to the sample measurement base 4 by the pneumatic sample feeding system, the sensing device 5 (optical fiber sensor) is triggered, and the sensing device 5 sends a position signal to the automatic mass total gamma analyzer 7 . When the automatic mass total gamma analyzer 7 receives the in-position signal and the sample information of the sample to be tested, it automatically starts the measurement program, starts the measurement, and automatically outputs the analysis result to the sample information management system 15 of the server after the measurement is completed.

3. Automatic return of the sample to be tested

After the analysis results are output to the sample information management system 15 of the server, the automatic mass total gamma analyzer 7 notifies the pneumatic sample delivery system to send the measured running rabbit bottle 6 containing the sample to be tested from the sample measurement base 4 along the original path. Return to the sample distribution station 1, and transfer to the sample temporary storage area 16 for temporary storage (as shown in FIG. 4).

The device described in the present invention is not limited to the embodiments described in the specific embodiments, and those skilled in the art can obtain other embodiments according to the technical solutions of the present invention, which also belong to the technical innovation scope of the present invention.

Claims (7)

1. An automated mass spectrometer system for measuring gamma radiation of a radioactive sample to be tested in a sample distribution station (1), characterized by: the system comprises an automatic mass total gamma analyzer (7) provided with a pneumatic sample conveying system, wherein the pneumatic sample conveying system is used for conveying the sample to be detected from the sample distribution table (1) to the automatic mass total gamma analyzer (7); the automatic mass total gamma analyzer (7) is used for obtaining and analyzing the gamma ray spectrum of the sample to be detected, outputting the analysis result of the gamma ray spectrum and controlling the pneumatic sample conveying system to convey the sample;

the automatic mass total gamma analyzer (7) comprises a control and analysis system connected with a detection system; the detection system is used for obtaining the gamma ray spectrum; the control and analysis system is used for analyzing the gamma ray spectrum, outputting the analysis result and controlling the pneumatic sample conveying system to convey the sample to be detected;

The pneumatic sample conveying system is a PTN main station (2) provided with a PTN conveying pipe (3), the PTN main station (2) is arranged on the sample distribution table (1) and is used for receiving the rabbit running bottles (6) which are sent out by the sample distribution table (1) and are filled with the samples to be detected, and the rabbit running bottles (6) are conveyed back and forth through the PTN conveying pipe (3) under the control of the control and analysis system; the top end of the PTN conveying pipe (3) is arranged on the PTN main station (2); the tail end of the PTN conveying pipe (3) is provided with a sample measuring base (4), and the sample measuring base (4) is arranged at a position close to the detection system and used for positioning and sending the rabbit running bottle (6); the sample measuring base (4) is provided with a sensing device (5), and the sensing device (5) can sense whether the rabbit running bottle (6) is positioned in the sample measuring base (4) and send a corresponding in-place signal to the control and analysis system;

the detection system comprises a NaI detector (8), a collimator (10) and a shielding body (9) arranged on the periphery of the NaI detector (8), and gamma rays emitted by the sample to be detected in the rabbit running bottle (6) in the sample measurement base (4) enter the NaI detector (8) after passing through the collimator (10) to form the gamma ray spectrum;

The rabbit running bottle (6) is used as a rabbit running bottle and a measuring bottle; when the sample is used as a rabbit running bottle, the sample to be detected is transferred; when the sample bottle is used as a measuring bottle, the sample to be measured is contained; the uncovering/closing of the rabbit running bottle (6) and the moving of the sample to be tested are omitted.

2. The automated mass total gamma analyzer system of claim 1, wherein: PTN conveying pipe (3) are through the conveying of pneumatic conveying mode run rabbit bottle (6), induction system (5) are optical fiber sensor.

3. The automated mass total gamma analyzer system of claim 1, wherein: the control and analysis system comprises a PLC control system (11), an industrial personal computer and analysis software (12); the PLC control system (11) is used for the logical control of the pneumatic sample feeding system, the detection system, the industrial personal computer and the analysis software (12), and also comprises the signal interaction with the sample distribution table (1); the industrial personal computer and the analysis software (12) are connected with the detection system and used for obtaining, processing, calculating and analyzing the gamma ray spectrum to obtain the analysis result, and the industrial personal computer and the analysis software (12) are also connected with the sample information management system (15) and output the analysis result to the sample information management system (15).

4. The automated mass total gamma analyzer system of claim 3, wherein: when the rabbit running bottle (6) is transmitted to the sample measuring base (4) from the PTN main station (2), the sensing device (5) sends out a corresponding in-place signal, and the PLC control system (11) receives sample information of the sample to be measured in the rabbit running bottle (6) sent by the sample distribution table (1), the PLC control system (11) can control the detection system and the industrial personal computer and analysis software (12) to acquire, process, calculate and analyze the gamma ray spectrum of the sample to be measured in the rabbit running bottle (6) to obtain the analysis result, and output the analysis result to the sample information management system (15); when running rabbit bottle (6) and being located in sample measurement base (4), PLC control system (11) can be in industrial computer and analysis software (12) will analysis result output to behind sample information management system (15) control pneumatic sample sending system will in sample measurement base (4) run rabbit bottle (6) and convey back to PTN main website (2).

5. The automated mass total gamma analyzer system of claim 3, wherein: the PLC control system (11) and the industrial personal computer and the analysis software (12) are arranged in an electric control cabinet (13).

6. The automated mass total gamma analyzer system of claim 3, wherein: the PLC control system (11) is connected with the sample distribution table (1) through an Ethernet.

7. The automated mass total gamma analyzer system of claim 3, wherein: the industrial personal computer and the analysis software (12) are connected with the sample information management system (15) through a network cable (14).

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