Comprehensive disposal method for associated radioactive materials

Abstract

The invention relates to a comprehensive disposal method for associated radioactive materials, comprising the following steps: acquiring monitoring information of radioactive materials to be disposed, the monitoring information comprising a monitoring report and monitoring parameters; inspecting the radioactive materials, comparing inspection results with the monitoring parameters, and if the inspection results are consistent with the monitoring parameters, classifying the materials according to the monitoring parameters of the radioactive materials; the material classification comprises to-be-treated materials and recyclable materials; if the inspection result is not consistent with the monitoring parameters, marking the radioactive materials as rejected materials or classifying the radioactive materials into materials needing to be processed; the recyclable materials are recycled, and treatment is completed; and judging whether the to-be-treated material meets the landfill standard or not, if yes, carrying out landfill treatment and finishing disposal, and if not, carrying out pretreatment until the to-be-treated material meets the landfill standard, and then, carrying out landfill treatment and finishing disposal. The economic investment of disposal can be reduced, and resources are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of radioactive material treatment, and in particular to a comprehensive treatment method for associated radioactive materials. Background Art

[0002] In order to protect the environment, the state has successively issued corresponding management policies for enterprises developing and utilizing associated radioactive minerals, including the "Notice on the Release of the List of Radiation Environment Supervision and Management for the Development and Utilization of Mineral Resources (First Batch)" (Environmental Protection Office

[2013] No. 12) issued by the former Ministry of Environmental Protection and the latest "Technical Specifications for Radiation Environment Protection of Storage of Associated Radioactive Materials and Landfill of Solid Waste (Trial)" (HJ1114-2020), which require strengthening the treatment and disposal of associated radioactive solid waste and supervision and monitoring, and clearly include associated radioactive solid waste with an activity concentration of any nuclide of the uranium and thorium series exceeding 1000Bq / kg within the scope of radiation environment supervision. The state has always emphasized the concept of turning solid waste into treasure, and through the form of secondary treatment of solid waste, the recyclable part is effectively utilized to eliminate the toxic and harmful components in the waste.

[0003] At present, in the comprehensive disposal process of associated radioactive materials, there are problems such as the disposal effect cannot meet the requirements, the economic investment is large, and a huge waste of resources occurs. The above problems need to be solved urgently. Summary of the invention

[0004] The invention discloses a comprehensive disposal method for associated radioactive materials, aiming to solve the technical problems existing in the prior art.

[0005] The present invention adopts the following technical solutions:

[0006] The present invention provides a comprehensive disposal method for associated radioactive materials, which is used for a disposal repository to process received radioactive materials to be disposed of; the method comprises the following steps:

[0007] Acquiring monitoring information of the radioactive materials to be disposed of, the monitoring information including monitoring reports and monitoring parameters;

[0008] Inspecting the radioactive material and comparing the inspection result with the monitoring parameter,

[0009] If the inspection result is consistent with the monitoring parameter, the material classification is performed according to the monitoring parameter of the radioactive material; the material classification includes materials to be processed and recyclable materials;

[0010] If the inspection result does not match the monitoring parameter, the radioactive material is marked as rejected or classified as material to be processed;

[0011] The recyclable materials are recycled and disposed of;

[0012] Determine whether the material to be processed meets the landfill standard,

[0013] If it meets the requirements, it will be landfilled and disposed of.

[0014] If it does not meet the requirements, it will be pre-treated to meet the landfill standards and then landfilled to complete the disposal.

[0015] In a comprehensive disposal method for associated radioactive materials of the present invention, the step of obtaining monitoring information of the radioactive materials to be disposed of further includes the step of checking whether the monitoring information is qualified;

[0016] The step of checking whether the monitoring information is qualified comprises:

[0017] Check whether the monitoring report has the qualification certification mark of the nationally recognized inspection and testing agency;

[0018] Check whether the monitoring parameters include gamma radiation dose rate, waste residue radionuclide concentration, pH and moisture content.

[0019] In a comprehensive disposal method for associated radioactive materials of the present invention, the step of obtaining monitoring information of the radioactive materials to be disposed of further includes the step of checking whether the radioactive materials meet the acceptance criteria;

[0020] The step of checking whether the radioactive material meets the acceptance criteria includes:

[0021] According to the comparison between the activity concentration of a single nuclide of the uranium or thorium series in the monitoring parameter of the radioactive material and the activity concentration of a single nuclide of the uranium or thorium series in the acceptance standard, it is judged whether the radioactive material meets the acceptance standard.

[0022] In a comprehensive disposal method for associated radioactive materials of the present invention, the step of inspecting the radioactive materials and comparing the inspection results with the monitoring parameters comprises:

[0023] The radioactive materials are sampled and inspected, and the results of the sample inspection are compared with the monitoring parameters.

[0024] In the comprehensive disposal method for associated radioactive materials of the present invention, the sampling rate of the sampling inspection is 2%.

[0025] In a comprehensive disposal method for associated radioactive materials of the present invention, after the step of sampling and inspecting the radioactive materials and comparing the results of the sampling and inspection with the monitoring parameters, it also includes the step of increasing the sampling rate and continuing the inspection if the results of the sampling and inspection are unqualified when compared with the monitoring parameters.

[0026] In a comprehensive disposal method for associated radioactive materials of the present invention, if the inspection result does not match the monitoring parameter, the step of marking the radioactive material as rejected or classified as material to be processed includes:

[0027] If the moisture content and pH value in the inspection result are inconsistent with the comparison result of the monitoring parameters, then pre-treating the radioactive material according to the moisture content and pH value in the inspection result;

[0028] If the gamma radiation dose rate in the inspection result does not match the comparison result of the monitoring parameter, the radioactive material is marked as rejected.

[0029] In a comprehensive disposal method for associated radioactive materials of the present invention, the step of classifying materials according to the monitoring parameters of the radioactive materials comprises:

[0030] According to the monitoring parameters 235 U activity concentration to classify the radioactive materials,

[0031] If, the 235 U activity concentration is greater than or equal to 12.3Bq / g, then the radioactive material is a recyclable material.

[0032] If, the 235 If the U activity concentration is less than 12.3 Bq / g, the radioactive material is a material that needs to be treated.

[0033] In a comprehensive disposal method for associated radioactive materials of the present invention, the step of inspecting the radioactive materials further comprises the step of inspecting the outer packaging of the radioactive materials;

[0034] The step of inspecting the outer packaging of the radioactive material comprises inspecting whether the outer packaging of the radioactive material is damaged,

[0035] If the outer packaging is damaged, repack it.

[0036] In the comprehensive disposal method of associated radioactive materials of the present invention, the landfill standard is that the pH value of the monitoring parameters is between 6 and 9, and the water content is less than or equal to 40%.

[0037] In a comprehensive disposal method for associated radioactive materials of the present invention, the step of pre-treating to meet landfill standards comprises:

[0038] The radioactive material is subjected to the steps of pH neutralization, water content control and / or leaching toxicity control.

[0039] In a comprehensive disposal method for associated radioactive materials of the present invention, the landfill treatment step comprises:

[0040] Conducting flexible landfill treatment on the radioactive materials whose activity concentration of single nuclides of uranium or thorium series in the monitoring parameters is between 1 and 400 Bq / g;

[0041] The radioactive materials whose activity concentration of a single nuclide of the uranium or thorium series in the monitoring parameters is greater than 400 Bq / g are subjected to rigid landfill treatment.

[0042] In the comprehensive disposal method of associated radioactive materials of the present invention, the step of closing the disposal repository after the disposal volume reaches the designed storage capacity is also included;

[0043] The step of closing the disposal repository comprises:

[0044] A covering layer is provided, which includes, from bottom to top, a radon or thorium shielding layer, an artificial anti-seepage lining layer, a drainage layer, an anti-biological invasion layer and a vegetation layer; a flood control and drainage system is arranged in the vegetation layer.

[0045] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0046] The present invention mainly provides a comprehensive disposal method for associated radioactive materials, which is based on the comparison of inspection results with monitoring parameters to conduct preliminary detection of radioactive materials to be disposed, control the specifications of received radioactive materials, and classify radioactive materials that meet the acceptance requirements, and treat them separately according to the classification. In this way, the energy consumption of the subsequent disposal process can be reduced, the disposal cost and economic investment can be saved, and resources can be saved; the method of separate disposal also facilitates targeted treatment of radioactive materials, thereby effectively controlling the disposal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:

[0048] Figure 1 The figure is a schematic flow chart of the comprehensive disposal method of associated radioactive materials of the present invention. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is usually used in the sense of including "and / or", unless the content clearly indicates otherwise.

[0050] Unless expressly indicated to the contrary, the numerical parameters in this specification and the appended claims may be approximate values ​​and can be changed according to the desired properties obtained by the content of the present invention. Specifically, all numbers used in the specification and claims to express the content of the composition, reaction conditions, etc., should be understood to be modified by the term "about" in all cases. In general, the meaning of the expression is to include a change of ±10% in some embodiments, a change of ±5% in some embodiments, a change of ±1% in some embodiments, and a change of ±0.5% in some embodiments by a specific number.

[0051] Furthermore, the word "comprising" does not exclude the presence of materials or steps not listed in the claims. Ordinal numbers such as "first", "second", "third" and Arabic numerals, letters, etc. used in the specification and claims to modify corresponding elements or steps do not themselves mean the order of the manufacturing method. The use of these ordinals is only used to make the steps clearly distinguishable.

[0052] In addition, unless the steps are specifically described or must occur in sequence, the order of the above steps is not limited to the above list, and can be changed or rearranged according to the required design. And the above embodiments can be mixed and matched with each other or with other embodiments based on design and reliability considerations, that is, the technical features in different embodiments can be freely combined to form more embodiments.

[0053] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] In order to solve the problems existing in the prior art, the embodiment of the present application provides a comprehensive disposal method for associated radioactive materials.

[0055] A comprehensive disposal method for associated radioactive materials, the comprehensive disposal method is used for a disposal repository to process received radioactive materials to be disposed of; Figure 1 As shown, it includes the following steps:

[0056] Obtain monitoring information of radioactive materials to be disposed of, including monitoring reports and monitoring parameters; specifically, the monitoring information is the information carried by the vehicle when the radioactive materials to be disposed of are sent to the disposal repository; specifically, the radioactive materials are associated radioactive materials generated by associated mineral production enterprises (such as rare earth beneficiation waste slag, niobium ore smelting waste slag, zircon and zirconium oxide smelting waste slag, lead-zinc ore smelting waste slag, vanadium ore smelting waste slag, radioactive solid waste generated in the environmental remediation process of associated mineral enterprises, etc.

[0057] Inspect the radioactive materials and compare the inspection results with the monitoring parameters, that is, check the data of the monitoring parameters to see whether they are consistent with the monitoring parameter information;

[0058] If the inspection results are consistent with the monitoring parameters, the materials are classified according to the monitoring parameters of the radioactive materials; the material classification includes materials that need to be processed and materials that can be recycled;

[0059] If the inspection results do not match the monitoring parameters, the radioactive material will be marked as rejected or classified as material requiring treatment;

[0060] Recyclable materials are recycled and disposed of; radioactive materials marked as rejected are returned;

[0061] Determine whether the material to be processed meets the landfill standards.

[0062] If it meets the requirements, it will be landfilled and disposed of.

[0063] If it does not meet the requirements, it will be pre-treated to meet the landfill standards and then landfilled to complete the disposal.

[0064] The present invention provides a comprehensive disposal method for associated radioactive materials. The method is based on comparing the inspection results with the monitoring parameters to conduct preliminary inspection on the radioactive materials to be disposed, control the specifications of the received radioactive materials, classify the radioactive materials that meet the acceptance requirements, and treat them separately according to the classification. In this way, the energy consumption of the subsequent disposal process can be reduced, the disposal cost and economic investment can be saved, and resources can be saved. The method of separate disposal can also facilitate targeted treatment of the radioactive materials, thereby effectively controlling the disposal effect. The disposal of associated radioactive materials can be completed scientifically and accurately, which is conducive to solving the contradiction between the development and utilization of co-associated resources and radioactive safety issues.

[0065] In some preferred embodiments, the monitoring information also includes enterprise information, industry category, waste residue name, waste residue generation amount, transportation method and transportation frequency.

[0066] In some preferred embodiments, for radioactive materials to be processed, the integrity of the information file should be checked when receiving them. The information file should include the following: the source, name, amount of waste, gamma radiation dose rate, pH, moisture content, shipping date and package number of the waste. If the information is incomplete, it needs to be supplemented before receiving it.

[0067] In some preferred embodiments, the step of obtaining monitoring information of the radioactive material to be disposed of further includes the step of checking whether the monitoring information is qualified;

[0068] The steps to check whether the monitoring information is qualified include:

[0069] Check whether the monitoring report has the qualification certification mark of the nationally recognized inspection and testing agency;

[0070] Check whether the monitoring parameters include gamma radiation dose rate, waste residue radionuclide concentration, pH and moisture content; based on the inspection of monitoring parameters and monitoring reports, ensure that the radioactive materials entering the disposal repository meet the standards, thereby ensuring the quality and effectiveness of the subsequent disposal process.

[0071] In some preferred embodiments, the step of obtaining monitoring information of the radioactive material to be disposed of further includes the step of checking whether the radioactive material meets the acceptance criteria;

[0072] The steps to check whether radioactive materials meet the acceptance criteria include:

[0073] By comparing the activity concentration of a single nuclide of the uranium or thorium series in the monitoring parameters of the radioactive material with the activity concentration of a single nuclide of the uranium or thorium series in the acceptance standard, it is determined whether the radioactive material meets the acceptance standard; based on this, the received radioactive material is preliminarily screened, so that the properties of the material are more uniform during subsequent treatment, thereby ensuring the quality of the disposal; preferably, the activity concentration of a single nuclide of the uranium or thorium series in the acceptance standard is greater than or equal to 1000Bq / kg.

[0074] In some preferred embodiments, the steps of inspecting the radioactive material and comparing the inspection results with the monitoring parameters include:

[0075] Conduct random inspections on radioactive materials and compare the results of random inspections with monitoring parameters; random inspections can reduce inspection workload and improve inspection efficiency.

[0076] Preferably, the sampling rate for random inspection is 2%.

[0077] The method of sampling and inspecting radioactive materials and comparing the results of the sampling and inspection with the monitoring parameters also includes: if the results of the sampling and inspection are unqualified when compared with the monitoring parameters, the sampling rate is increased and the inspection step is continued; based on the combination of low sampling rate and high sampling rate, the inspection efficiency is improved and the accuracy of sampling is guaranteed; specifically, the sampling rate can be increased to 4%; the inspection results after the sampling rate is increased are compared with the monitoring parameters to confirm whether they are consistent.

[0078] In some preferred embodiments, if the inspection result does not match the monitoring parameters, the step of marking the radioactive material as rejected or classified as material to be processed includes:

[0079] If the moisture content and pH value in the inspection results do not match the comparison results of the monitoring parameters, the radioactive material shall be pretreated according to the moisture content and pH value in the inspection results;

[0080] If the gamma radiation dose rate in the inspection result is inconsistent with the comparison result of the monitoring parameter, the radioactive material will be marked as rejected; based on this, the radioactive material sent to the disposal repository will be further refined, making the disposal process more refined and thus achieving better disposal results.

[0081] In some preferred embodiments, the step of classifying materials according to monitoring parameters of radioactive materials includes:

[0082] According to the monitoring parameters 235 U activity concentration is used to classify radioactive materials.

[0083] like, 235 If the U activity concentration is greater than or equal to 12.3Bq / g, the radioactive material is recyclable and can be recovered for uranium extraction.

[0084] like, 235 If the U activity concentration is less than 12.3Bq / g, the radioactive material is a material that needs to be treated.

[0085] In some preferred embodiments, the step of inspecting the radioactive material further comprises the step of inspecting the outer packaging of the radioactive material;

[0086] The steps for inspecting the outer packaging of radioactive materials include: checking whether the outer packaging of radioactive materials is damaged,

[0087] If the outer packaging is damaged, repack it.

[0088] In some preferred embodiments, the landfill standard is that the pH value in the monitoring parameters is between 6 and 9, and the water content is less than or equal to 40%.

[0089] In some preferred embodiments, the step of pre-treating to meet landfill standards comprises:

[0090] The step of neutralizing the pH value of the radioactive material, controlling the moisture content and / or controlling the leaching toxicity; specifically, adjusting the pH value and radionuclide leaching performance of the radioactive material by adding a pH regulator (lime, etc.), a radionuclide leaching performance stabilizer, etc. to the associated radioactive material. The specific addition ratio needs to be determined by conducting neutralization experiments, radionuclide leaching performance and stabilization tests based on the characteristics of the material to meet the landfill requirements.

[0091] In some preferred embodiments, the landfill treatment step comprises:

[0092] Flexible landfill treatment is carried out for radioactive materials with a single nuclide activity concentration of uranium or thorium series in the monitoring parameters of 1 to 400 Bq / g;

[0093] Radioactive materials with a single nuclide activity concentration of uranium or thorium series greater than 400Bq / g in the monitored parameters shall be rigidly landfilled.

[0094] In some preferred embodiments, for the materials to be landfilled, there should be a material information sheet, which should at least include: ① material source; ② material volume and weight; ③ type and total activity of radioactive nuclides; ④ surface dose rate; ⑤ sending and receiving date.

[0095] In some preferred embodiments, the step of closing the repository is further included when the disposal volume reaches the designed storage capacity;

[0096] The steps to close the repository include:

[0097] A covering layer is provided, which includes, from bottom to top, a radon or thorium shielding layer, an artificial impermeable lining layer, a drainage layer, an anti-biological invasion layer and a vegetation layer, and a flood control drainage layer is provided in the vegetation layer; a surface water drainage blind ditch is provided at the connection between the drainage layer and the surface, and the surface water drainage blind ditch is made of the same material as the drainage layer, and the surface water drainage blind ditch is finally connected to the rainwater system of the site; preferably, the covering layer is inclined, and the slope value is not less than 5%.

[0098] in,

[0099] Radon or thorium shielding layer: made of natural materials, with a permeability coefficient not greater than 1×10 -7 cm / s, and the thickness should be determined based on the diffusion characteristics of radon (thoron) and the shielding performance of the material.

[0100] The permeability coefficient of the artificial anti-seepage lining is not greater than 1×10 -12cm / s, with a thickness of not less than 1.5mm. It is mainly used to block the surface water from infiltrating into the drainage layer in the covering layer after the enclosure is covered, so as to effectively prevent the radioactive contamination caused by the infiltration of surface water; specifically, the artificial impermeable lining can be an impermeable membrane, preferably, the artificial impermeable lining includes a double-layer impermeable membrane and a water-absorbing and swelling strip, such as a water-absorbing and swelling sealing strip; the water-absorbing and swelling strip is sandwiched between the impermeable membrane, and the end thereof extends out of the edge of the impermeable membrane. Based on this, on the one hand, a double-layer impermeable membrane is set to improve the anti-seepage effect, and on the other hand, based on the water-absorbing and swelling strip set between the double-layer impermeable membrane When there is a problem with the upper anti-seepage membrane, such as a large amount of leakage, the water-absorbing and swelling strips absorb water and expand to prop up the gap between the double-layer anti-seepage membranes to form a drainage ditch, which is convenient for drainage (the covering layer has a slope, and the artificial anti-seepage lining is paved along the slope) to avoid the accumulation of seepage water affecting the anti-seepage effect of the lower layer; further preferably, a plurality of water-absorbing and swelling strips are arranged at intervals, such as parallel intervals or radially arranged to cover the highest point, to promote drainage, and preferably, the water-absorbing and swelling strips are bonded between the anti-seepage membranes, thereby facilitating the paving of the anti-seepage membrane and folding and transportation.

[0101] The permeability coefficient of the drainage layer is not less than 0.1cm / s. It is mainly used to guide the infiltration flow formed after the surface water flows into the landfill area. The accumulated water in the drainage layer is finally discharged into the surface drainage ditch around the landfill area. The material of the surface water drainage blind ditch is the same as that of the drainage layer, and the surface water drainage blind ditch is finally connected to the rainwater system of the site.

[0102] The anti-biological invasion layer includes a gravel layer with a thickness of not less than 30cm to prevent animals from burrowing and plants from taking root, which may damage the integrity of the drainage layer.

[0103] The thickness of the vegetation restoration layer shall not be less than 35cm. The vegetation should not damage the anti-seepage layer. It is mainly used to prevent soil erosion of the cover layer and restore the landscape.

[0104] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A comprehensive disposal method for associated radioactive materials, the comprehensive disposal method is used in a disposal repository to process received radioactive materials to be disposed of; characterized in that: The steps include: Acquiring monitoring information of the radioactive materials to be disposed of, the monitoring information including monitoring reports and monitoring parameters; Inspecting the radioactive material and comparing the inspection result with the monitoring parameter, If the inspection result is consistent with the monitoring parameter, the material classification is performed according to the monitoring parameter of the radioactive material; the material classification includes materials to be processed and recyclable materials; If the inspection result does not match the monitoring parameter, the radioactive material is marked as rejected or classified as material to be processed; The recyclable materials are recycled and disposed of; Determine whether the material to be processed meets the landfill standard, If it meets the requirements, it will be landfilled and disposed of. If it does not meet the requirements, it will be pre-treated to meet the landfill standards and then landfilled to complete the disposal.

2. A comprehensive disposal method for associated radioactive materials according to claim 1, characterized in that: After the step of obtaining the monitoring information of the radioactive material to be disposed, the step of checking whether the monitoring information is qualified is also included; The step of checking whether the monitoring information is qualified comprises: Check whether the monitoring report has the qualification certification mark of the nationally recognized inspection and testing agency; Check whether the monitoring parameters include gamma radiation dose rate, waste residue radionuclide concentration, pH and moisture content.

3. The comprehensive disposal method for associated radioactive materials according to claim 1, characterized in that: After the step of obtaining monitoring information of the radioactive material to be disposed, the step of checking whether the radioactive material meets the acceptance criteria is also included; The step of checking whether the radioactive material meets the acceptance criteria includes: According to the comparison between the activity concentration of a single nuclide of the uranium or thorium series in the monitoring parameter of the radioactive material and the activity concentration of a single nuclide of the uranium or thorium series in the acceptance standard, it is judged whether the radioactive material meets the acceptance standard.

4. The comprehensive disposal method for associated radioactive materials according to claim 1, characterized in that: The step of inspecting the radioactive material and comparing the inspection result with the monitoring parameter comprises: The radioactive materials are sampled and inspected, and the results of the sample inspection are compared with the monitoring parameters.

5. The comprehensive disposal method for associated radioactive materials according to claim 4, characterized in that: The step of sampling and inspecting the radioactive materials and comparing the results of the sampling and inspection with the monitoring parameters also includes, if the results of the sampling and inspection are unqualified when compared with the monitoring parameters, increasing the sampling rate and continuing the inspection step.

6. The comprehensive disposal method for associated radioactive materials according to claim 1, characterized in that: If the inspection result does not match the monitoring parameter, the steps of marking the radioactive material as rejected or classified as material to be processed include: If the moisture content and pH value in the inspection result are inconsistent with the comparison result of the monitoring parameters, then pre-treating the radioactive material according to the moisture content and pH value in the inspection result; If the gamma radiation dose rate in the inspection result does not match the comparison result of the monitoring parameter, the radioactive material is marked as rejected.

7. The comprehensive disposal method for associated radioactive materials according to claim 1, characterized in that: The step of classifying materials according to the monitoring parameters of the radioactive materials includes: According to the monitoring parameters 235 U activity concentration to classify the radioactive materials, If, the 235 U activity concentration is greater than or equal to 12.3Bq / g, then the radioactive material is a recyclable material. If, the 235 If the U activity concentration is less than 12.3 Bq / g, the radioactive material is a material that needs to be treated.

8. The comprehensive disposal method for associated radioactive materials according to claim 1, characterized in that: The step of pre-treating the process to meet landfill standards includes: The radioactive material is subjected to the steps of pH neutralization, water content control and / or leaching toxicity control.

9. The comprehensive disposal method for associated radioactive materials according to claim 1, characterized in that: The landfill treatment step comprises: Conducting flexible landfill treatment on the radioactive materials whose activity concentration of single nuclides of uranium or thorium series in the monitoring parameters is between 1 and 400 Bq / g; The radioactive materials whose activity concentration of a single nuclide of the uranium or thorium series in the monitoring parameters is greater than 400 Bq / g are subjected to rigid landfill treatment.

10. The comprehensive disposal method for associated radioactive materials according to claim 1, characterized in that: It also includes the step of closing the disposal repository when the disposal volume reaches the designed storage capacity; The step of closing the disposal repository comprises: A covering layer is provided, which includes, from bottom to top, a radon or thorium shielding layer, an artificial anti-seepage lining layer, a drainage layer, an anti-biological invasion layer and a vegetation layer; a flood control and drainage system is arranged in the vegetation layer.

Images