阅读说明：本技术 一种基于xact的放射性废物固化结构检测方法 (XACT-based radioactive waste solidification structure detection method ) 是由 刘明哲 罗锐 刘祥和 黄瑶 于 2020-07-10 设计创作，主要内容包括：本发明公开了一种基于XACT的放射性废物固化结构检测方法,针对现有放射性废物固化结构体检测技术的不足,本发明提供了一种基于XACT的放射性废物固化结构性能检测的方法,其包括利用XACT检测,声波信号相似比较计算,通过XACT检测所制标样得到的数据制作标准数据库,利用声波相似比较工具对待判定的数据与所建立的标准数据库中数据逐一进行相似比较计算,实现快速判断放射性废物固化体结构性能是否满足行业和国家的标准,来改善传统检测方式的耗时耗力问题和减少因固化体遗漏和损坏引起的放射性废物固化体的放射性泄露而造成对人类和环境的放射性危害。(The invention discloses a radioactive waste solidification structure detection method based on XACT, aiming at the defects of the existing radioactive waste solidification structure detection technology, the invention provides a radioactive waste solidification structure performance detection method based on XACT, which comprises the steps of utilizing XACT detection, performing acoustic signal similarity comparison calculation, making a standard database through data obtained by a standard sample prepared by XACT detection, and utilizing an acoustic similarity comparison tool to perform similarity comparison calculation on data to be judged and data in the established standard database one by one, so as to realize the purpose of rapidly judging whether the structure performance of a radioactive waste solidification body meets the standards of the industry and the country, thereby improving the problem of time consumption and labor consumption of the traditional detection mode and reducing radioactive hazards to human beings and the environment caused by radioactive leakage of the radioactive waste solidification body due to omission and damage of the solidification body.)

1. A method for detecting a radioactive waste solidification structure based on XACT, which is characterized by comprising the following steps:

step 01, manufacturing a plurality of groups of radioactive waste solidified bodies according to different radioactive waste solidification modes;

step 02, irradiating the manufactured radioactive waste solidified body by using proper pulse X rays generated by an X-ray emitting device;

step 03, collecting ultrasonic signals converted by pulse X-rays produced by an X-ray emitting device in a solidified body through an ultrasonic signal collector;

step 04, performing performance test on the radioactive waste solidified bodies one by using a traditional detection method, and taking the ultrasonic signals of the radioactive waste solidified bodies which are qualified in detection as an ultrasonic signal comparison database for XACT detection;

step 05, carrying out XACT detection on the radioactive waste solidification structure to be detected, and collecting ultrasonic signals of the radioactive waste solidification structure to be detected one by one;

step 06, comparing the ultrasonic signals of the detected radioactive waste solidification structure with the data of the ultrasonic signal comparison database by using a sound wave similarity comparison tool to calculate similarity;

step 07, making reasonable logic judgment according to the similarity, namely, the radioactive waste solidification structure with high similarity is used as a qualified radioactive waste solidification structure to wait for further treatment, and the radioactive waste solidification structure with low similarity or no similar signal is used as an unqualified radioactive waste solidification structure to wait for further treatment;

step 08, sampling the radioactive waste solidification structure, and performing performance test by adopting a traditional detection method;

and 09, crushing the radioactive waste solidification structure judged to be unqualified in the steps 07 and 08, reproducing the crushed radioactive waste solidification structure into a new radioactive waste solidification structure to be detected, returning to the step 05 for detection, and storing the radioactive waste solidification structure judged to be qualified in the steps 07 and 08.

2. A XACT-based radioactive waste solidification structure detection method according to claim 1, wherein the X-ray emitting device generates suitable pulsed X-rays by: and adjusting the wavelength of the X-ray generated by the X-ray emitting device so that the radioactive waste solidified body can be collected by the ultrasonic signal collector to obtain an ultrasonic signal with a good signal.

3. The method for detecting the solidification structure of the radioactive waste based on the XACT as claimed in claim 2, wherein the step of sampling the solidification structure of the radioactive waste refers to sampling the solidification bodies of the radioactive waste judged to be qualified or unqualified in the step 07, performing performance test by using a traditional detection method to detect the accuracy of the judgment, and using the test data to enrich and correct the data of the ultrasonic signal comparison database.

Technical Field

The invention relates to the field of radioactive waste detection, in particular to a radioactive waste solidification structure detection method based on XACT.

Background

Bowen et al, university of Arizona, USA, detected ultrasonic waves generated by water under X-ray irradiation in 1991, and research on photoacoustic effect based on X-ray slowly gained attention until the first time in 2013 by Xiang team, university of Oklahoma, proposed X-ray excited Acoustic tomography technology X-ray Induced Acoustic tomography (XACT), which utilizes the principle of optical and Acoustic propagation combination, specifically: when a substance is irradiated by pulsed light, the substance absorbs the energy of the pulsed light to cause transient temperature rise, so that the thermal expansion of the region is caused, and an ultrasonic phenomenon of outward radiation is generated.

Radioactive waste is a substance that contains or is contaminated with radionuclides, whose concentration or activity is greater than the level of cleanliness regulations prescribed by the state department of regulatory authorities, and is expected to be no longer utilized. It is mainly derived from the processes of nuclear fuel production, reactor operation, nuclear fuel reprocessing and nuclear facility decommissioning, whereas improper management and disposal of radioactive waste can have adverse effects on human health and the environment both now and in the future. The radioactive waste solidification is to convert gas, liquid or solid waste with certain radioactivity into a massive solid with performance index meeting the disposal requirement, and the purpose is to form an object which is suitable for loading, unloading, transportation or temporary storage and has the performance meeting the disposal requirement.

The traditional radioactive waste solidification body performance detection mainly comprises the detection of the mechanical performance, the compressive strength, the shock resistance, the water resistance, the leaching resistance and other performances of the radioactive waste solidification body, however, the traditional radioactive waste solidification body performance detection utilizes the items of sampling random screening test to serve as a reference standard for judging whether the batch of solidification packaging structures meet requirements or not, so that some radioactive waste solidification bodies solidified in the same batch must be damaged in the detection process, or solidification bodies with unqualified structural performance are omitted in the random detection process, and unnecessary radiation damage is caused to the environment and human beings. In addition, the traditional detection method has long detection time and many items to be detected, and cannot perform real-time and rapid detection, so that the whole process is time-consuming and labor-consuming.

Disclosure of Invention

The invention aims to provide a method for detecting the performance of a radioactive waste solidification structure based on XACT (X-ray absorption computed tomography), and aims to provide a method for quickly detecting the performance of the radioactive waste solidification structure in real time aiming at the defects of the existing traditional detection technology. .

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a method for detecting a radioactive waste solidification structure based on XACT, which is characterized by comprising the following steps:

step 01, manufacturing a plurality of groups of radioactive waste solidified bodies according to different radioactive waste solidification modes;

step 02, irradiating the manufactured radioactive waste solidified body by using proper pulse X rays generated by an X-ray emitting device;

step 03, collecting ultrasonic signals converted by pulse X-rays produced by an X-ray emitting device in a solidified body through an ultrasonic signal collector;

step 04, performing performance test on the radioactive waste solidified bodies one by using a traditional detection method, and taking the ultrasonic signals of the radioactive waste solidified bodies which are qualified in detection as an ultrasonic signal comparison database for XACT detection;

step 05, carrying out XACT detection on the radioactive waste solidification structure to be detected, and collecting ultrasonic signals of the radioactive waste solidification structure to be detected one by one;

step 06, comparing the ultrasonic signals of the detected radioactive waste solidification structure with the data of the ultrasonic signal comparison database by using a sound wave similarity comparison tool to calculate similarity;

step 07, making reasonable logic judgment according to the similarity, namely, the radioactive waste solidification structure with high similarity is used as a qualified radioactive waste solidification structure to wait for further treatment, and the radioactive waste solidification structure with low similarity or no similar signal is used as an unqualified radioactive waste solidification structure to wait for further treatment;

step 08, sampling the radioactive waste solidification structure, and performing performance test by adopting a traditional detection method;

and 09, crushing the radioactive waste solidification structure judged to be unqualified in the steps 07 and 08, reproducing the crushed radioactive waste solidification structure into a new radioactive waste solidification structure to be detected, returning to the step 05 for detection, and storing the radioactive waste solidification structure judged to be qualified in the steps 07 and 08.

Further, the method for generating the suitable pulse X-ray by the X-ray emitting device comprises the following steps: and adjusting the wavelength of the X-ray generated by the X-ray emitting device so that the radioactive waste solidified body can be collected by the ultrasonic signal collector to obtain an ultrasonic signal with a good signal.

Further, sampling the radioactive waste solidification structure refers to sampling the radioactive waste solidification body judged to be qualified or unqualified in the step 07, performing performance test by adopting a traditional detection method to detect the accuracy of judgment, and enriching and correcting data of an ultrasonic signal comparison database by using test data.

Compared with the prior art, the invention has the following beneficial effects:

(1) according to the radioactive waste solidification structure detection method based on XACT, XACT detection is carried out on the manufactured standard sample, after the standard sample is subjected to performance test through a traditional detection method, the ultrasonic signal of the qualified standard sample is extracted and used for establishing a database capable of determining whether the measured radioactive waste solidification structure reaches the industrial and national standards. Through XACT detection and acquisition of ultrasonic signals of the radioactive waste solidification structure to be detected, and comparison with data of a database, whether the radioactive waste solidification structure to be detected is qualified or not can be rapidly judged, so that radiation hazards caused by damage to a part of radioactive waste solidification bodies in each detection are changed, and the problem that unqualified solidification bodies are omitted due to random spot check in a traditional detection mode is avoided.

(2) The invention samples the radioactive waste solidified body which is judged to be qualified or unqualified after XACT detection in an indefinite time, and adopts the traditional detection method to carry out performance test, thereby not only detecting the judgment accuracy of the solidification structure of the batch, but also entering the data supplement obtained by the test into the database to enrich, correct and perfect the database continuously, thereby improving the data accuracy of the database continuously and finding out the value of the best definition similarity. Over time, completely replace the detection methods required to damage the solidified waste in conventional detection.

(3) According to the invention, the wavelength of the X-ray generated by the X-ray emitting device is adjusted, so that the radioactive waste solidified body can be acquired by the ultrasonic signal acquisition device to obtain an ultrasonic signal with a good signal, and the detection accuracy is improved.

Drawings

Fig. 1 is a flowchart of a method for detecting a radioactive waste solidification structure based on XACT according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of an operating principle of XACT detection provided by an embodiment of the present invention.

In the drawings, the names of the parts corresponding to the reference numerals are as follows:

1-X-ray suitable for different solidified materials, 2-radioactive waste solidified bodies of different materials, 3-ultrasonic signals converted by the X-ray, and 4-ultrasonic signal acquisition device.

Detailed Description

The present invention is further illustrated by the following figures and examples, which include, but are not limited to, the following examples.

Referring to fig. 1 to 2, a method for detecting a radioactive waste solidification structure based on XACT (X-ray Induced Acoustic tomography), includes the following steps:

and step 01, manufacturing a plurality of groups of radioactive waste solidified bodies according to different radioactive waste solidification modes. A plurality of groups of radioactive waste solidified bodies are manufactured by different materials such as cement solidification, asphalt solidification, glass solidification and plastic solidification according to a traditional mode, the structures are uniform, complete radioactive waste solidified bodies are shown, and the waste solidified bodies are used as standard samples for acquiring ultrasonic signals subsequently.

Step 02, irradiating the manufactured radioactive waste solidified body, namely the standard sample, by using proper pulse X-rays generated by the X-ray emitting device. The wavelength of the X-rays generated by the X-ray emitting device is adjusted, so that the radioactive waste solidified body can be acquired by the ultrasonic signal acquisition device to acquire ultrasonic signals with good signals, and the detection accuracy is improved.

And 03, acquiring an ultrasonic signal converted by the pulse X-ray generated by the X-ray emitting device in the solidified body through an ultrasonic signal collector.

And step 04, performing performance test on the radioactive waste solidified bodies one by using a traditional detection method, taking the ultrasonic signals of the radioactive waste solidified bodies qualified in the traditional detection as an ultrasonic signal comparison database for XACT detection, aiming at the reliability of artificially detected data after standard samples are strictly manufactured, storing the reliable data to establish a database meeting industrial and national standards, and having higher accuracy, providing a more accurate and convenient mode for subsequent detection and simultaneously reducing troubles for the correction of the subsequent comparison database.

And step 05, carrying out XACT detection on the radioactive waste solidification structure to be detected, and collecting ultrasonic signals of the radioactive waste solidification structure to be detected one by one.

And step 06, comparing the ultrasonic signal of the detected radioactive waste solidification structure with the data of the ultrasonic signal comparison database by using a sound wave similarity comparison tool to obtain similarity. The sound wave similarity comparison tool is existing software, such as computer tools like Matlab and sps, calculates the similarity between the sound wave to be detected and the sound wave in the comparison database, and can refer to a tool for judging and scoring KTV singing.

And step 07, making reasonable logic judgment according to the similarity, namely using the radioactive waste solidification structure with high similarity as a qualified radioactive waste solidification structure to wait for further treatment, and using the radioactive waste solidification structure with low similarity or no similarity signal as an unqualified radioactive waste solidification structure to wait for further treatment. The initial similarity may be determined randomly to a value and then the magnitude of this similarity is corrected by subsequent sampling checks. For example, if the similarity value is initially high, random inspection finds that many of the cured structures determined to be failed based on the high similarity value are acceptable, and the similarity needs to be correspondingly reduced. Meanwhile, the similarity for standard judgment has a certain difference according to different radioactive materials of the curing structure.

Through XACT detection and acquisition of ultrasonic signals of the radioactive waste solidification structure to be detected, and comparison with data of a database, whether the radioactive waste solidification structure to be detected is qualified or not can be rapidly judged, so that radiation hazards caused by damage to a part of radioactive waste solidification bodies in each detection are changed, and the problem that unqualified solidification bodies are omitted due to random spot check in a traditional detection mode is avoided.

And step 08, sampling the radioactive waste solidification structures, and performing performance test by adopting a traditional detection method, so as to judge whether the radioactive waste solidification structures of the batch are accurate or not. And the data supplement obtained by testing is entered into a database, and the database is enriched, corrected and perfected continuously, so that the data accuracy of the database is improved continuously. Over time, completely replace the detection methods required to damage the solidified waste in conventional detection.

And 09, crushing the radioactive waste solidification structure determined to be unqualified in the steps 07 and 08, reproducing the crushed radioactive waste solidification structure into a new radioactive waste solidification structure to be detected, returning to the step 05 for detection, and storing the radioactive waste solidification structure determined to be qualified in the steps 07 and 08, so that the accuracy of XACT detection is further improved.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, but all changes that can be made by applying the principles of the present invention and performing non-inventive work on the basis of the principles shall fall within the scope of the present invention.