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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GBZ139-2019: (Radiation protection requirements for rare earth production sites) Status: Valid GBZ139: Historical versions
Basic dataStandard ID: GBZ 139-2019 (GBZ139-2019)Description (Translated English): (Radiation protection requirements for rare earth production sites) Sector / Industry: National Standard Classification of Chinese Standard: C57 Classification of International Standard: 13.100 Word Count Estimation: 15,178 Date of Issue: 2019 Date of Implementation: 2020-04-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GBZ139-2019: (Radiation protection requirements for rare earth production sites)---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.(Radiation protection requirements for rare earth production sites) ICS 13.100 C 57 GBZ National Occupational Health Standards of the People's Republic of China Replace GBZ 139-2002 Radiation protection requirements for rare earth production sites 2019-09-27 released 2020-04-01 implementation Issued by the National Health Commission of the People's Republic of China Table of contentsForeword...II 1 Scope...1 2 Normative references...1 3 Terms and definitions...1 4 General requirements...2 5 Classification and protection requirements for rare earth production sites...2 6 Protective measures...2 7 Workplace Monitoring...4 8 Monitoring and estimation of personal dose...5 9 Occupational Health Monitoring...6 Appendix A (informative appendix) The derived air concentration of common radionuclides...7 Appendix B (informative appendix) The main content of radiation protection training for workers in rare earth production sites...9 Appendix C (Normative Appendix) Methods of Estimating Personal Dose...10 References...12ForewordChapters 4 to 9 and Appendix C of this standard are mandatory, and the rest are recommended. This standard is formulated in accordance with the "Law of the People's Republic of China on Occupational Disease Prevention and Control" This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GBZ 139-2002 "Radiation Health Protection Standards in Rare Earth Production Sites". Compared with GBZ 139-2002, except for editing The main technical changes besides the sexual modification are as follows. -Modified the requirements for the classification of rare earth production radioactive sites (see Chapter 5, Chapter 4 of the.2002 edition); --- Increase the requirements for protective measures (see Chapter 6); - Detailed requirements for the selection of workplace monitoring points (see 7.3, 6.1 of the.2002 edition); --Added the requirements for personal monitoring of staff (see 8.1). Drafting organizations of this standard. Institute of Radiation Protection and Nuclear Safety Medicine, Chinese Center for Disease Control and Prevention, Institute of Radiation Medicine, Fudan University, Jiang Western Provincial Institute of Occupational Disease Prevention and Control, Sichuan Provincial Center for Disease Control and Prevention, Hunan Provincial Institute of Occupational Disease Prevention and Control, Baotou City Center for Disease Control and Prevention. The main drafters of this standard. Sun Quanfu, Li Xiaoliang, Hou Changsong, Zhuo Weihai, Cui Hongxing, Lei Shujie, Chen Yishui, Wen Xiangmin, Li Hong, Zhu Guozhen, Peng Junzhe, Jin Rong. The previous versions of the standard replaced by this standard are as follows. --GBZ 139-2002. Radiation protection requirements for rare earth production sites1 ScopeThis standard specifies the principles and basic requirements of radiation protection for rare earth production sites. This standard is applicable to radiation protection in workplaces such as rare earth mining, mineral processing and smelting.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. GB/T 11743 γ-spectrum analysis method for radionuclides in soil GB/T 14056.1 Determination of Surface Contamination Part 1.β-emitter (Eβmax＞0.15 MeV) and α-emitter GB/T 14582 Standard measurement method for radon in ambient air GB/T 14583 Code for determination of environmental surface gamma radiation dose rate GBZ 1 Hygienic Standard for Design of Industrial Enterprises GBZ 2.1 Occupational Exposure Limits for Hazardous Factors in the Workplace Part 1.Chemical Hazardous Factors GBZ 128 Specification for personal monitoring of occupational external exposure GBZ 129 Specifications for personal monitoring of occupational internal exposure GBZ 188 Technical Specification for Occupational Health Monitoring GBZ /T 233 Radiation Health Protection Standard for Tin Mine Workplace GBZ 235 Technical Specification for Occupational Health Monitoring of Radiation Workers GBZ /T 256 Radon radiation protection requirements in non-uranium mining AQ.2013.4-2008 Ventilation Technical Specification for Metal and Nonmetal Underground Mines Ventilation Management EJ/T 978 Regulations on personal monitoring and management of radiation workers in uranium geology, mines, and processing plants3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Rare earths The lanthanides in the periodic table of elements 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 17 Yuan The general term for vegetarian. 3.2 Materials Feedstock, intermediate products, final products, by-products and waste are collectively referred to as materials, including ore (raw ore, concentrate), mixed rare earth compounds Waste, tailings, water leaching residue (also known as acid soluble residue, iron and thorium residue), scaling, sludge and dust from dust collectors.4 General requirements4.1 The protective measures of rare earth production sites should be adapted to the specific conditions of the production site, and radiation protection should follow the legitimacy, protection and safety of practice. Three basic principles of total optimization and personal dose limit. 4.2 The employer shall classify the rare earth production sites as required. 4.3 The employer shall adopt corresponding protection requirements according to different classifications.5 Classification and protection requirements for rare earth production sites5.1 Collect materials in each production link, focusing on samples such as ore, tailings, and water leaching slag, and adopt corresponding physical or chemical methods to determine Among them, the activity concentration of natural radionuclides such as 232Th of the thorium series and 238U of the uranium series, combined with the expected annual effective dose of individuals, is useful for rare earth production. Hierarchical management of sites (see Table 1). 5.2 According to the activity concentration levels of thorium-based and uranium-based radionuclides in the materials, combined with the expected annual effective dose of individuals, appropriate protection requirements shall be adopted. Seek peace action to protect the occupational health of the staff.6 Protective measures6.1 General requirements 6.1.1 On the whole, do a good job in the design, installation, maintenance and operation of engineering facilities at rare earth production sites. 6.1.2 Equipped with radiation protection management personnel familiar with rare earth production processes to ensure radiation safety in production sites. 6.1.3 Take engineering measures, including the use of closed automatic equipment with negative pressure to process the concentrated radioactive materials, The color of hands, equipment, furniture, etc. is significantly different from that of processed materials and products. 6.1.4 The wet process should be used to reduce dust. 6.1.5 The process of preferential separation of thorium, uranium and radium is adopted to create non-radioactive or low-radioactive operating conditions for the subsequent processes, and minimize The area of radioactive contamination. 6.1.6 Develop effective measures and implement strict management to avoid spillage during on-site transportation, promote cleaner production, and conduct daily inspections on production areas. Clean up. Using advanced technology and equipment, timely disposal of radioactive "three wastes". 6.2 Workplace partition 6.2.1 Production areas such as ore mining, beneficiation, separation and smelting shall be separated from non-production areas such as office areas and living areas. 6.2.2 The production area should be selected in a location with good air pollutant diffusion conditions and arranged on the upwind side of the local annual minimum frequency wind direction. The area is arranged on the leeward side of the local annual minimum frequency wind direction, and the auxiliary production area is arranged between the two; the workshop that produces radioactive dust and the "three The “waste” treatment site should be located on the upwind side of the local annual minimum frequency wind direction in the adjacent workshop. 6.2.3 Divide workplaces with high levels of radioactivity (for example, the dose equivalent rate around γ may be greater than 15 μSv/h) into control areas for management Rationale. Other workplaces not classified as controlled areas shall be managed as supervision areas. The control area and other working areas should be clearly separated physically, And put up eye-catching warning signs of ionizing radiation, establish and implement certain management measures. 6.3 Dust control 6.3.1 Necessary dust reduction measures should be taken for dusty processes in workplaces such as mining, beneficiation and smelting. The specific requirements shall be implemented with reference to GBZ 1. 6.3.2 The requirements for dust concentration control in the workplace shall be implemented in accordance with GBZ 2.1. 6.3.3 Refer to Appendix A for the derived air concentration of natural radionuclides in the workplace. 6.3.4 When the above dust reduction measures cannot meet the requirements, a closed operating pavilion or dust-free operation shall be provided for the staff. 6.4 Ventilation 6.4.1 Good ventilation should be ensured during underground rare earth mining and other indoor production processes. For specific requirements, refer to GBZ 1 and AQ.2013.4- 2008 implementation. 6.4.2 Avoid setting up fixed jobs in the return air lane. 6.4.3 Ventilation measures in rare earth mining workplaces under radon exposure shall refer to GBZ /T 256.During underground mining, when necessary Take measures such as surface spraying and blocking to reduce the activity concentration of radon and its daughters (including thoron gas and its daughters). 6.5 Personal protection 6.5.1 According to the risk of specific pollutants and specific working conditions, provide staff with sufficient work clothes, hoods, gloves, and conjoined work Clothing, waterproof boots and aprons. 6.5.2 In the case of emergency, repair and maintenance, wear filter-type protective masks and isolated respiratory protective equipment for a short time. 6.5.3 Strengthen the control of dust, radon progeny and thoron progeny (220Rn) progeny, and wear dust masks as needed. 6.5.4 There are clear and appropriate requirements for the storage, washing and decontamination of contaminated clothing, as well as the brushing of work boots and shoes, to prevent contamination of personnel Diffusion between workplaces and workplaces to minimize occupational exposure and environmental pollution. 6.5.5 Before entering the workplace, take proper care of skin wounds, especially hand wounds, such as wrapping with waterproof tape. 6.5.6 Provide shower facilities for staff. Workers should shower and change clothes when leaving the production area, and between the production area and the non-production area, If necessary, set up a sanitary passage area with radioactive surface contamination monitoring function. 6.5.7 Reserve ample time for the staff to ensure that they can take a shower before breaks, meals and before get off work. 6.5.8 Provide staff with easy-to-use clean dining areas, equipped with clean water and hand-washing equipment, ensure fresh air, and inform work How personnel use these facilities. 6.6 Personnel training and notification 6.6.1 Workers should receive training on radiation health protection knowledge. See Appendix B for training content. 6.6.2 The employer shall inform the staff of the occupational hazards and their health effects and protective measures at the rare earth production site in writing. It can be used as an attachment to the labor contract and posted in a prominent place on the production site.7 Workplace monitoring7.1 Monitoring plan The employer should develop a radiation health monitoring plan, which includes. a) Selection of monitoring items; b) Method of sampling and distribution; c) Frequency requirements for monitoring; d) The performance requirements of the equipment used for monitoring, especially the requirements that the sensitivity should meet; e) The requirements for the adaptability of instruments and equipment in special environments such as hot flashes and dust in the workplace; f) Verification or calibration and maintenance requirements of monitoring equipment; g) Record form for monitoring; h) Judgment and processing procedures for abnormal values; i) Other related content. 7.2 Monitoring items Monitoring items include. a) The monitoring of the control area should record the staying time of the individual at each work position, and the monitoring record should meet the needs of estimating the individual's cumulative radiation exposure; b) The activity concentration of radionuclides such as 232Th and 238U in the material; c) γ surrounding dose equivalent rate; d) Activity concentration of radon and its progeny (including thoron and its progeny); e) Radioactive surface contamination. 7.3 Principles of sampling 7.3.1 The monitoring points of the dose equivalent rate around γ should cover all production areas, especially the fixed working positions and work Areas that need to stay for a long time. 7.3.2 Principles of sampling locations for dust, radon and its progeny (including thoron and its progeny) in the air. a) All dust working positions shall be covered, and priority shall be given to high-concentration dust working positions operated by staff; b) Sampling should be carried out at the breathing belt of the staff, generally 1.5 m from the ground, but pay attention to the working posture of the staff Is it sitting or standing; c) The sampling point of the mining face should be selected on the leeward side 5 m～10 m away from the working face, and the sampling point of the supporting patio should be set on the protection platform. Hanging tank or climbing tank patio is set on the tank; d) The sampling point of the stope should be located on the downwind side of the working point. When the stope area is less than 100 m2, set up a sampling point greater than 100 m2 More than two sampling points should be arranged at the main working point; e) In open-pit mines, the activity concentration monitoring of radon and its progeny (including thoron and its progeny) is not required. Indoor workplace should Carry out monitoring of radon and its progeny (including thoron and its progeny). 7.3.3 Monitoring points for surface pollution are mainly selected in the workplace (mainly including stopes with high dust concentration, crushing workshops, beneficiation workshops, The walls, floors, workbenches and equipment surfaces of smelting workshops and product packaging workshops. 7.3.4 Workplace monitoring should pay attention to monitoring the special places and locations involved in equipment maintenance. 7.4 Frequency of monitoring 7.4.1 The expected activity concentration changes and historical monitoring results should be considered. 7.4.2 In general, the monitoring frequency requirements organized by the employer are as follows. a) The radionuclide activity concentration in the material is tested every six months; b) γ external radiation dose rate, dust concentration and surface pollution are monitored once every 1 month to 3 months; c) In workplaces where rare earth mines are mined underground, the passive accumulation of radon and thoron gas activity concentration monitoring takes 3 months as a monitoring cycle, and The detector should be replaced in time. 7.4.3 The employer shall entrust a qualified institution to conduct radiological health monitoring, frequency once a year. 7.4.4 When the following situations occur, the frequency of monitoring should be increased. a) Major changes have taken place in production layout, mining methods, production processes or ventilation systems; b) The source of materials such as ore changes, and the activity concentration of the materials may increase; c) The monitoring results of individual workplaces exceed the normal range; d) Exceeds the preset activity concentration or dose level; e) The effect of improvement measures needs to be evaluated. 7.4.5 For open-pit mining, pay attention to the adverse effects of the static atmospheric state caused by the temperature inversion on the radiation exposure level of the workplace, and increase the monitoring frequency when necessary. 7.5 Monitoring methods 7.5.1 Refer to GB/T 11743 for the monitoring method of the activity concentration of 232Th and 238U radionuclides in materials. 7.5.2 The monitoring method of γ surrounding dose equivalent rate refers to GB/T 14583. 7.5.3 The monitoring method for the activity concentration of radon and its progeny (including thoron and its progeny) refer to GB/T 14582. 7.5.4 The monitoring method of radioactive surface contamination refers to GB/T 14056.1.8 Monitoring and estimation of personal dose8.1 Monitoring 8.1.1 When a group of workers have similar work patterns and their exposure dose is far below the occupational exposure dose limit, you can choose Select a part of the staff for personal monitoring to establish typical exposure scenarios and doses. Based on the working hours of others, you can estimate Personal dose of all staff. 8.1.2 Personal dose monitoring of external exposure shall be implemented in accordance with GBZ 128.Personal monitoring of internal exposure is performed in accordance with GBZ 129. 8.1.3 When estimates of personal occupational exposure based on personal air sampling are not accurate or reliable, or when the airborne radionuclide in individual areas When the environmental activity concentration is abnormally high, biological analysis measurement techniques can be considered, such as urinalysis, stool analysis, thorium exhalation analysis And lung counter measurement, etc., according to GBZ 129. 8.1.4 In some specific workplaces (such as packaging workshops and maintenance periods), individual radioactive aerosol sampling and monitoring can be conducted as needed. Measurement. Carry out long-lived nuclide alpha aerosol activity concentration or dust concentration monitoring in the air, the common natural radionuclide in rare earth workplaces Refer to Appendix A for the derived limit of annual intake. 8.1.5 For workers whose occupational exposure dose may be greater than 5 mSv/a, personal monitoring must be carried out. The occupational exposure dose is expected to be 1 The staff within the range of mSv/a～5 mSv/a should conduct personal monitoring as much as possible; for those whose exposure dose can never exceed 1 mSv/a Staff may not conduct personal monitoring. Personal dose monitoring of radon progeny refers to the requirements of EJ/T 978. 8.2 Estimate See Appendix C for the estimation method.9 Occupational Health Monitoring9.1 The staff of rare earth production sites shall b......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GBZ139-2019_English be delivered?Answer: Upon your order, we will start to translate GBZ139-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GBZ139-2019_English with my colleagues?Answer: Yes. The purchased PDF of GBZ139-2019_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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