GBZ 139-2019 Radiological protection requirements for the production places of rare earths
1 Scope
This standard specifies the principles and basic requirements for radiological protection at the production places of rare earths.
This standard is applicable to radiological protection in workplaces such as rare earth mining, ore dressing, and smelting.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the referenced document applies.
GB/T 11743 Determination of radionuclides in soil by gamma spectrometry
GB/T 14056.1 Evaluation of surface contamination - Part 1: Beta-emitters (maximum beta energy greater than 0.15 MeV) and alpha emitters
GB/T 14582 Standard methods for radon measurement in environmental air
GB/T 14583 Norm for the measurement of environmental terrestrial gamma-radiation dose rate
GBZ 1 Hygienic standards for the design of industrial enterprises
GBZ 2.1 Occupational exposure limits for hazardous agents in the workplace - Part 1: Chemical hazardous agents
GBZ 128 Specifications for individual monitoring of occupational external exposure
GBZ 129 Specifications for individual monitoring of occupational internal exposure
GBZ 188 Technical specifications for occupational health surveillance
GBZ/T 233 Radiological protection standards for the workplaces of tin mine
GBZ 235 Specifications for occupational health surveillance for radiation workers
GBZ/T 256 Radiological protection requirements for radon exposure in the non-uranium mining
AQ 2013.4-2008 Ventilation technical standards for metal and nonmetal underground mines ventilation manage
EJ/T 978 Regulations on individual monitoring and management of radiation works involved in uranium geology, mines, and ore dressing and smelting plants
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
rare earths
collective term for the 17 elements in the periodic table, including the lanthanides (Lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Promethium (Pm), Samarium (Sm), Europium (Eu), Gadolinium (Gd), Terbium (Tb), Dysprosium (Dy), Holmium (Ho), Erbium (Er), Thulium (Tm), Ytterbium (Yb), Lutetium (Lu)), plus Scandium (Sc) and Yttrium (Y) of the same family
3.2
materials
collective term for feed materials, intermediate products, final products, by-products, and waste, including ores (raw ore and concentrate), mixed rare earth compounds, tailings, water-leached residues (also known as acid-soluble residues or iron-thorium residues), scale, sludge, and dust collector deposits
4 General requirements
4.1 Protective measures in the production places of rare earths shall be adapted to the specific conditions of the production places. Radiological protection shall follow the three basic principles of justifiable practice, optimal protection and safety, and individual dose limit.
4.2 The employers shall classify production places of rare earths as required.
4.3 The employers shall take corresponding protective measures based on the classifications.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 Classification and protective requirements for production places of rare earths
6 Protective measures
7 Workplace monitoring
8 Monitoring and estimation of individual dose
9 Occupational health surveillance
Annex A (Informative) Derived air concentration of common radionuclides
Annex B (Informative) Main contents of training in radiological health protection for workers in production places of rare earths
Annex C (Normative) Method for estimating individual dose
Bibliography
