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GB 14569.1-2011: Performance requirements for low and intermediate level radioactive waste form -- Cemented waste form
Status: Valid GB 14569.1: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB 14569.1-2011 | English | 139 |
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Performance requirements for low and intermediate level radioactive waste form -- Cemented waste form
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GB 14569.1-2011
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| GB 14569.1-1993 | English | 199 |
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Characteristic requirements for solidified waste of low and intermediate level radioactive waste. Cement solidified waste
| Obsolete |
GB 14569.1-1993
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PDF similar to GB 14569.1-2011
Basic data | Standard ID | GB 14569.1-2011 (GB14569.1-2011) | | Description (Translated English) | Performance requirements for low and intermediate level radioactive waste form -- Cemented waste form | | Sector / Industry | National Standard | | Classification of Chinese Standard | F75 | | Classification of International Standard | 13.280 | | Word Count Estimation | 6,685 | | Date of Issue | 2011-02-18 | | Date of Implementation | 2011-09-01 | | Older Standard (superseded by this standard) | GB 14569.1-1993 | | Quoted Standard | GB 7023; GB 9132; GB 9133; GB 11806; GB/T 17671 | | Regulation (derived from) | Department of Environmental Protection announcement No. 21 of 2011 Announcement of Newly Approved National Standards No. 6 of 2011 | | Issuing agency(ies) | Ministry of Environmental Protection, General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China | | Summary | This Chinese standard specifies the low and intermediate level radioactive waste solidified cement (hereinafter referred to as cement solidified) minimum performance requirements and test methods. This standard applies to near- surface disposal of solidified cement, bulk cement solidified casting exception. | GB 14569.1-2011: Performance requirements for low and intermediate level radioactive waste form -- Cemented waste form
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Performance requirements for low and intermediate level radioactive waste form -- Cemented waste form
National Standards of People's Republic of China
Replacing GB 14569:1-93
Performance requirements for low and medium level radioactive waste solidified bodies
Cement solidified body
Performance requirements for low and intermediate level radioactive waste form
-Cemented waste form
Posted on:2011-02-18
2011-09-01 Implementation
Ministry of Environmental Protection
General Administration of Quality Supervision, Inspection and Quarantine
release
directory
Foreword:::iv
1 Scope:::1
2 Normative references:::1
3 Terms and Definitions:::1
4 Cement solidified body radioactivity concentration limit:::1
5 Performance requirements:::1
6 Performance test method:::2
iii
Low and medium level radioactive waste solidified body performance requirements cement solidified body
1 Scope of application
This standard specifies the minimum performance requirements and inspection methods for cement solidified bodies of low and medium level radioactive wastes (hereinafter referred to as cement solidified bodies):
This standard applies to cement solidified bodies disposed near the surface, except for large-volume cement casting solidified bodies:
2 Normative references
The content of this standard refers to the clauses in the following documents: For undated references, the valid edition applies to this standard:
GB 7023 Long-term leaching test of solidified radioactive waste
GB 9132 Provisions for Shallow Ground Disposal of Low and Medium Level Radioactive Solid Waste
GB 9133 Classification of Radioactive Waste
GB 11806 Regulations for Safe Transport of Radioactive Materials
GB/T 17671 Test method for strength of cement mortar (ISO method)
3 Terms and Definitions
The following terms and definitions apply to this standard:
3:1
Cement solidified body cemented waste form
Refers to the uniform solidified body formed by mixing radioactive waste and cement substrate according to a certain formula:
3:2
free liquid
Refers to an unbound liquid that is not bound by a solid matrix:
4 Cement solidified body radioactivity concentration limit
The radioactivity concentration of the cement solidified body shall meet the relevant requirements of GB 9132 and GB 9133:
5 Performance requirements
The performance of the cement solidified body should meet the relevant requirements of GB 9132 and GB 11806:
5:1 Free liquid
Under the condition of room temperature and airtightness, the cured cement body after curing should not have any free liquid exuded:
5:2 Mechanical properties
Under room temperature and airtight conditions, the cured cement body after curing and complete hardening should be a dense, uniform and stable block, and it should be
Meet the following requirements:
a) Compressive strength The compressive strength of the cement solidified body sample shall not be less than 7 MPa;
b) Impact resistance of cement solidified samples or solidified containers with a vertical free fall from a height of 9 m to the concrete floor
There should be no visible fragmentation of the body:
5:3 Water resistance
5:3:1 Resistance to leaching
Cement solidified body samples are leached in deionized water at 25°C, and should meet the limit requirements of leaching rate and cumulative leaching fraction:
The leaching rate of the nuclide on the 42nd day should be lower than the following limits:
-- 60Co: 2×10−3 cm/d;
-- 137Cs: 4×10−3 cm/d;
-- 90Sr: 1×10−3 cm/d;
-- 239Pu: 1×10−5 cm/d;
-- Other β, γ radionuclides (excluding 3H): 4×10−3 cm/d;
-- Other alpha nuclides: 1×10−5 cm/d:
The cumulative leaching fraction of nuclides for 42 days should be lower than the following limits:
-- 137Cs: 0:26 cm;
-- Other radionuclides (excluding 3H): 0:17 cm:
5:3:2 Immersion resistance
After the immersion resistance test of the cement solidified body sample, its appearance should not have obvious cracks or cracks, and the loss of compressive strength should not exceed 25%:
5:4 Freeze-thaw resistance
After the freeze-thaw resistance test of the cement solidified body sample, its appearance should not have obvious cracks or cracks, and the loss of compressive strength should not exceed 25%:
This test may not be carried out when the cement solidified body is stored, transported and disposed of in an environment where the annual minimum temperature is higher than 0°C:
5:5 Resistance to γ-irradiation
After the cement solidified body sample is subjected to gamma irradiation test, its appearance should not have obvious cracks or cracks, and the loss of compressive strength should not exceed 25%:
When the cumulative absorbed dose of cement solidified body is less than 1×104 Gy within 300 years, this test may not be carried out:
6 Performance testing methods
6:1 Free liquid
Use non-radioactive simulated waste to prepare cement solidified body according to the prescribed formula, and the height of the cement solidified body should be as close as possible to the cement on the project
The actual height of the solidified body (diameter not less than 80 mm, height not less than 750 mm), after curing for 7 days under airtight conditions, observe the cement solidification:
There is no free liquid on the upper surface of the cement body, and the bottom of the container containing the cement solidified body is opened by drilling holes or other appropriate methods:
The area should not be less than 650 mm2, and check whether there is free liquid flowing out or dripping from the opening:
6:2 Mechanical properties
6:2:1 Sample preparation
Pour the cement slurry prepared according to the prescribed formula into the cylinder test mold, put it into the curing box for curing for 28 d after smoothing, and the curing temperature is 25 °C ± 5 °C,
Relative humidity ≥90%: After demoulding, the samples were ground to keep the upper and lower end faces parallel: The diameter and height of the specimen should be kept as ϕ50 mm × 50 mm:
6:2:2 Compressive strength
The determination of compressive strength shall be carried out with reference to the relevant requirements in GB/T 17671:
The compressive strength performance test shall be measured on at least six parallel samples of cement cured bodies: Arithmetic for a set of six compressive strength determinations
The average value is the test result:
If one of the six measured values exceeds ± 20% of the average of the six, this result should be rejected, and the average of the remaining five should be used as the result:
If any of the five measured values exceed their mean ±20%, the group of results is discarded:
6:2:3 Impact resistance
The impact resistance test is carried out on the cement solidified body sample or the solidified body with packaging container that meets the compressive strength requirements, and the sample is tested from 9 m
Fall vertically and freely to the concrete floor from a high place, and observe whether the sample is obviously broken (small angular fragments and cracks are not regarded as broken):
6:3 Water resistance
6:3:1 Resistance to leaching
The leaching resistance test shall be carried out with cement solidified samples of real materials: The preparation and maintenance of the sample are the same as those specified in 6:2:1: right
The cement solidified body samples that meet the compressive strength requirements shall be subjected to the cement solidified body leaching test: The leaching test shall comply with the relevant regulations in GB 7023:
will be carried out:
6:3:2 Immersion resistance
The preparation and maintenance of the sample are the same as those specified in 6:2:1: The immersion resistance test is carried out on the cement solidified body sample that meets the compressive strength requirements:
Using deionized water, soak at 25℃±5℃ for 90 d, observe its appearance, and measure its compressive strength:
6:4 Freeze-thaw resistance
The preparation and maintenance of the sample are the same as those specified in 6:2:1: Freeze-thaw resistance test is carried out on cement solidified body samples that meet the requirements of compressive strength:
When the temperature in the freezer reaches −20°C, put the samples in airtight plastic bags into the box, and when the temperature in the box drops to −20°C again,
The freezing time is calculated from the beginning, and the freezing time is not less than 3 h each time (the freezing temperature should be kept at −20 to −15 °C):
The same as the plastic bag), immediately placed in a water tank of 15 ~ 20 ° C to melt, the melting time of each sample is not less than 4 h: The thaw is the freezing time
The melting cycle ends: Each cement solidified body sample was subjected to 5 freeze-thaw cycles, its appearance was observed, and its compressive strength was measured:
6:5 Resistance to gamma radiation
The preparation and maintenance of the sample are the same as those specified in 6:2:1: The cement solidified body sample that meets the compressive strength requirements is encapsulated in a glass tube,
And leave 5% to 10% of the free space volume, put the packaged sample into the special 60Co radiation source irradiation channel for irradiation (irradiation dose):
The rate should be lower than 2×103 Gy/h) until the cumulative absorbed dose of the sample reaches the cumulative absorbed dose that the cement solidified body may receive at the corresponding activity concentration:
When measuring, take out the glass tube, observe its appearance, and measure its compressive strength:
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