SN/T 5292-2021 in English
VALIDSpecification for management of radioactive waste in customs laboratories
- Issued on:2021-11-22
- Implemented on:2022-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
Introduction
Analysis of the core content of the standard
| Waste category | Activity concentration range | Typical nuclides | Management requirements |
|---|---|---|---|
| Exempt waste | ≤release level | K-40, etc. | Conventional treatment |
| Extremely short-lived waste | T1/2<100 days | I-131 | Release after decay |
| Extremely low level waste | 1-100 times the control value | C-14 | Simple protection |
| Medium level waste | ≤4E+11 Bq/kg | Pu-239 | Professional disposal |
Key technical points
Activity concentration determination requires the use of equipment such as high purity germanium gamma spectrometer for detection. When the activity is lower than 1E+02 Bq/kg, the indirect inference method can be considered. Mixed nuclides must meet the superposition formula of ∑(Ci/Cui)≤1.
Analysis of implementation difficulties
Case: A laboratory disposes of mixed waste containing Tc-99 (1E+05 Bq/kg) and Co-60 (5E+03 Bq/kg). According to Table A.2, the clearance levels are 1E+04 Bq/kg and 1E+01 Bq/kg respectively. Therefore, (1E+05/1E+04)+(5E+03/1E+01)=10+500=510>1, and it is determined to be radioactive waste.
Analysis of Standard Evolution
Compared with GB 14500-2002, the innovations of this standard include:
1. Clarify the special management requirements for small-batch wastes in tons
2. Add a new classification for extremely short-lived wastes (half-life < 100 days)
3. Refine the graded protection system for temporary storage sites
Suggestions for Compliance Operations
- Establish a waste delivery record system with double verification
- Medium-level waste storage areas should be equipped with online dose monitors
- Conduct surface contamination and dose rate inspections every quarter

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