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Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. HJ 1009-2019: Technical specification for operation of radiation environmental air automatic monitoring station Status: Valid
Basic dataStandard ID: HJ 1009-2019 (HJ1009-2019)Description (Translated English): Technical specification for operation of radiation environmental air automatic monitoring station Sector / Industry: Environmental Protection Industry Standard Word Count Estimation: 15,17 Date of Issue: 2019 Date of Implementation: 2019-03-01 Issuing agency(ies): Ministry of Ecology and Environment HJ 1009-2019: Technical specification for operation of radiation environmental air automatic monitoring station---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. Technical specification for operation of radiation environmental air automatic monitoring station National Environmental Protection Standard of the People's Republic Radiation ambient air automatic monitoring station operation technical specification Technical specification for operation of radiation environmental Air automatic monitoring station Published on.2018-12-24 2019-03-01 Implementation Ministry of Ecology and Environment released ContentForeword...II 1 Scope...1 2 Normative references...1 3 Terms and Definitions...1 4 Composition and function...1 5 Operation and daily inspection... 2 6 Maintenance and repair...6 7 Data Processing and Reporting...7 8 Quality Assurance...8 9 files...9 Appendix A (Normative Appendix) Radiation Ambient Air Automatic Monitoring Station Checklist...10 Appendix B (Normative Appendix) Radiation Ambient Air Automatic Monitoring Station Air Absorbed Dose Rate Report Format...11ForewordTo implement the "Environmental Protection Law of the People's Republic of China" and the "People's Republic of This standard is formulated for the operation and maintenance and quality assurance of the ambient air automatic monitoring station. This standard specifies the composition and function, operation and daily inspection, maintenance and repair, data processing and reporting of the automatic monitoring station for radiation ambient air. Technical requirements such as delivery, quality assurance and documentation. This standard is formulated by the Department of Ecological Environment Safety Supervision Department, Regulations and Standards Division. This standard was drafted. Zhejiang Radiation Environmental Monitoring Station (radiation environmental monitoring technology center). This standard is approved by the Ministry of Ecology and Environment on December 24,.2018. This standard has been implemented since March 1,.2019. This standard is interpreted by the Ministry of Ecology and Environment. Radiation ambient air automatic monitoring station operation technical specification1 Scope of applicationThis standard specifies the composition and function, operation and daily inspection, maintenance and repair, data processing and reporting of the automatic monitoring station for radiation ambient air. Technical requirements such as delivery, quality assurance and documentation. This standard applies to the national control radiation environment air automatic monitoring station constructed by the Ministry of Ecology and Environment. Radiation environmental monitoring agencies and other institutions at all levels The use of automatic monitoring stations to monitor the ambient air quality of the irradiated environment can also be referred to for implementation.2 Normative referencesThe provisions contained in the following standards and specifications, which are cited in this standard, constitute the provisions of this standard and have the same effect as this standard. Where does not indicate the date The latest version of the referenced document applies to this standard. HJ/T 61 Radiation Environmental Monitoring Technical Specification HJ/T 22 General provisions for sampling airborne radioactive materials QX/T 45 Ground meteorological observation specification Part 1. General3 Terms and definitionsThe following terms and definitions apply to this standard. 3.1 Radiation environment automatic monitoring The process of direct measurement, processing and analysis of the radiation environment using continuous automatic radiation monitoring equipment. 3.2 Radiation ambient air automatic monitoring station Fixed monitoring station for environmental gamma radiation, continuous monitoring of meteorological conditions and automatic sampling of air samples. 3.3 stability stability Measuring the stability of the instrumentation during operation. 3.4 data acquisition rate data acquisition rate The number of effective monitoring data actually obtained by the unit operating time of the radiation environment automatic monitoring station shall be monitored by the unit running time. The ratio of the total number of data.4 Composition and function4.1 Composition Radiation ambient air automatic monitoring station generally consists of one or more radiation environment monitoring equipment (dose rate monitor, gamma spectrometer, etc.) Sample equipment (aerosol, sediment, sampler in air iodine, etc.), meteorological monitoring equipment, control equipment, data acquisition and processing equipment And infrastructure and other components. Sampling equipment and weather monitoring equipment can be selected as needed. 4.2 Features The main function of the radiation environment air automatic monitoring station is to automatically and continuously monitor the environmental gamma radiation level and meteorological conditions, real-time acquisition, Process and store monitoring data, and transmit monitoring data, device health, and other information to the data aggregation center in real time through a wired or wireless network. Understand the quality of the radiation environment and trends, and release monitoring data. Radiation ambient air automatic monitoring station with sampling equipment, The aerosol, sediment and iodine in the air are collected, and the collected samples are sent to the laboratory for analysis.5 operation and daily inspection5.1 Radiation environmental monitoring 5.1.1 Air absorbed dose rate monitoring 5.1.1.1 The annual data acquisition rate of continuous monitoring of air absorbed dose rate should reach more than 90%. Raw data from dose rate monitor After reading, no technical processing such as smoothing, maxima, and minima deletion may be performed. 5.1.1.2 The mean value of the absorbed air dose rate shall be recorded and calculated at specified intervals, and the mean shall be the arithmetic mean over the effective collection interval. The frequency of collection of air absorbed dose rate is set according to actual needs. The general monitoring collection interval can be set to 5 minutes. 5.1.1.3 When the monitoring result is abnormal, it should be alarmed in time. The alarm threshold is generally set to the bottom plus n standard deviation, the background can be air The absorbed dose rate is 5 minutes mean or hourly average, n is generally 3~5; the alarm threshold can also be set to a single dose rate according to the previous years of operating experience. When calculating the background mean, abnormal data due to factors other than natural factors should be removed. If there is a change in the position or changes in the surrounding environment, recalculate. The alarm threshold can be set at full time or separately according to the precipitation period and the non-precipitation period. 5.1.1.4 When an abnormal alarm occurs, the abnormal data analysis shall be performed according to Section 7.2. Start sampling of the automatic monitoring station for radiation ambient air if necessary Equipment for sample collection. 5.1.2 γ radionuclide identification 5.1.2.1 Set up a number of (4~10) regions of interest as needed, each of which should contain one or more of the main features of the nuclide of interest. Volume peak. The counts of each region of interest are counted according to the set time interval, and compared with the background value, and an alarm is generated when an abnormality occurs. 5.1.2.2 When environmental radioactivity anomalies occur, preliminary judgments should be made on the types of nuclide, including but not limited to 232Th, 226Ra, 40K, artificial nuclides include, but are not limited to, 60Co, 137Cs, 131I, 192Ir, 75Se. 5.1.3 Sampling and analysis The monitoring content and frequency of monitoring of the samples shall be performed in accordance with HJ/T 61 requirements. After sample collection, coordination with the analytical laboratory should be enhanced and Connect to ensure that the collected samples are analyzed and tested within the specified time. With the passage of time and experience accumulation, sample monitoring projects and supervision The frequency measurement should be optimized. 5.2 Measurement of meteorological parameters 5.2.1 Meteorological parameters include air pressure, temperature, relative humidity, wind direction, wind speed and precipitation. 5.2.2 Meteorological parameters The frequency of collection of raw data. air pressure, temperature, relative humidity, wind direction, wind speed, and precipitation are all once per minute. The hourly average of each parameter is calculated after the raw data is collected. The collection of meteorological parameters shall comply with the requirements of QX/T 45. 5.2.3 The daily and monthly reports of meteorological parameters are. the average and extreme values of the day, month and year of air pressure, temperature, relative humidity and wind speed, and Corresponding time, etc.; the frequency of the sun and the moon in the wind direction, and the corresponding time, etc., and form the wind rose diagram of the month and the year; the total amount of precipitation, the number of days, months, and years, And corresponding time and so on. 5.2.4 Precipitation and air absorbed dose rate changes should be correlated; temperature and pressure parameters can be used for aerosol sample standard state volume Corrected. 5.3 Sample Collection 5.3.1 Aerosol 5.3.1.1 Sampling equipment and membrane Sampling equipment. the flow rate of the super large flow sampler is not less than 600m3/h, the flow indication error is ≤±5%; the flow rate of the large flow sampler is not less than 60m3/h, flow indication error ≤ ± 2%. The sampler should be confirmed to be good and stable before sampling. Filter membrane. The sampling membrane should meet the requirements of HJ/T 22. According to the method of nuclides analysis, select the appropriate filter, use the large flow sampler Collection efficiency should be determined before different types of membranes. Before sampling, check the filter for pinholes, defects or damage. The filter surface should be placed face up. Support the net, tighten the filter clamp so that it does not leak, set the sampling flow, sampling time and so on. The total sampled volume is converted to the standard state volume. 5.3.1.2 Sampling method Set the sampling volume according to the sampling purpose, the expected concentration and the lower detection limit of the nuclide. The sampling volume should generally be greater than 10000 m3. Sampling with a large flow sampler. If sampling with a large flow sampler, the total sampling time is 8 days (ie 192 hours), every 48 hours. Change the filter once. If the amount of dust collected by the filter is large and the resistance increases to affect the flow rate, the filter should be replaced in time. 5.3.2 Sediment The sediment was collected using a double sampling tray (A, B) mode. Sampling tray A starts to collect sediment when there is no precipitation, and should be steamed in it. Distilled water (for extremely cold areas, if the sampler has no heating device, antifreeze can be added, antifreeze should be measured by radiation level), water depth often Keep at 1~2cm; apply a thin layer of silicone oil (or glycerin) on the surface and bottom. The sampling tray B opens to collect sediment during precipitation. When collecting samples, rinse the sampling wall and collection tank three times with distilled water, and store them in pre-washed plastic or glass containers. sampling Samples of disks A and B were collected separately. During the collection period, the collection should be observed at least once a month to remove debris, insects and other debris that fall within the sampling tray. Regular observation and collection In the case of water in the barrel, when the amount of precipitation is large, in order to prevent the sediment from overflowing with water, samples should be collected in time and combined after sampling. 5.3.3 Iodine in the air 5.3.3.1 Sampling equipment and filter media Sampling equipment. flow rate 0~250L/min, flow indication error ≤±5%. Filter media. Includes filter paper and iodine boxes. The filter paper collects particulate iodine in the air; the iodine box collects elemental iodine, non-element inorganic iodine and organic iodine. 5.3.3.2 Sampling method Set the sampling volume according to the sampling purpose, the expected concentration and the lower detection limit of the nuclide. The sampling volume should generally be greater than 100 m3, and the sampling flow The amount should be controlled at 20~200L/min. The total volume of the sample should be converted to the volume of the standard state. 5.4 Sample Management 5.4.1 On-site recording Fill in the sampling record form and the sample label should be legible, complete and detailed. Sampling information including sampling location, sample number, sampling Start and stop time, meteorological conditions at the time of sampling, and other conditions related to sampling. The sample record form must be signed by the sampler and the reviewer. Sample mark The sign must not be separated from the sample. Special circumstances (such as power outages, instrument failures, etc.) should be recorded. 5.4.2 Preservation of samples 5.4.2.1 The collected samples should be stored in categories to prevent cross-contamination. 5.4.2.2 Filter membrane, filter paper and iodine box. aerosol sampling membrane should be stacked in order of sampling (stack shape and scale source shape) Consistent) in a cylindrical special sample box; the gas-iodine sampling filter paper and the iodine box are placed in two cylindrical plastic sample boxes, respectively The same sample box (depending on the instrument calibration method and measurement purpose). After the above filter media is placed, tighten the lid and stick the sample label. And make a sample record. 5.4.2.3 The sediment sample is stored in a polyethylene plastic drum (bottle), acidified to pH ≤ 2 with HNO3 (HCl), and the sample label is attached and stored. For measurement. The sample bucket (bottle) is cleaned with detergent, rinsed with tap water, soaked in dilute HNO3 (HCl) solution for a day and night, and passed The ionized water is repeatedly washed until the washing water is neutral, and then inverted and dried for use. 5.4.2.4 Precipitation samples used for helium analysis shall be stored in brown glass or high density plastic sample containers. 5.4.3 Transport of samples Before shipment, you should fill out the sample form and attach the on-site sampling record. Check the sample sample and sample label to check the sample package. Does it meet the requirements? Samples in transit should be handled by a special person to prevent damage and spillage, and take timely measures to ensure safe delivery. Go to the laboratory and complete the sample transfer according to the corresponding management regulations of the laboratory. 5.5 Daily inspection 5.5.1 Radiation ambient air automatic monitoring station should adopt daily monitoring and monthly inspection system, and daily monitoring adopts remote inspection mode. 5.5.2 Daily monitoring 5.5.2.1 Check if the data is normal. Look at the data curve and look for the cause if there is abnormal fluctuation. 5.5.2.2 Check the clock and calendar settings and find errors should be corrected in time. 5.5.2.3 Check if the equipment equipment is running and transmitting normally. If abnormal conditions are found, technical analysis should be conducted to determine the cause of the abnormality; When troubleshooting, you should go to the site immediately for on-site inspection and timely resolution. 5.5.3 monthly inspection 5.5.3.1 Station building 1) Check whether the station and surrounding environment are subject to natural or man-made damage such as lightning strikes and flooding; check the appearance of the station and rust and wind Inspection, sealing, etc.; check the integrity and aging of external power supply cables and communication cables; check the corrosion, looseness, etc. of lightning protection grounding bodies Happening. 2) Check if there is abnormal noise or smell in the station room, whether the equipment is complete, whether there is any loss or damage, and each fixed instrument has No damage, dust, rust, looseness or other abnormalities; remove safety hazards, check security equipment, lighting system and exhaust exhaust system Check if the fire extinguisher is valid and usable. 3) Check the power supply and distribution system of the station, check the working condition of the uninterruptible power supply host and the battery, and check the operation of the signal lightning protection equipment. 4) Check if the temperature and humidity in the station are maintained in a reasonable range. Clean the filter of the station air conditioner to prevent dust from blocking Filter. 5) Check the environmental sanitation around the station, clean the equipment and the inside and outside of the station, and keep the contents inside the station. Orderly, neat and beautiful. 5.5.3.2 Data Acquisition Processing and Transmission System 1) Observe whether the various cables and data cables are normal. 2) Check the parameter settings, data acquisition and storage of instrument equipment (including sampling equipment) in the software system. Check access control, smoke System software functions such as fog and water immersion. 3) Restart each instrument and check whether the operation is normal. Open the aerosol sampler and iodine sampler through software. Off and sampling control, check if the function is normal. 4) Check if the encryption gateway works normally. Check the wired and wireless link connectivity and disconnect the wired link and wireless router respectively. Check if the data is connected in the software system and data center. 5) Restart the software, check whether the error is reported, and whether the monitoring contents are normal; check whether the site data is connected in the data center. Complete, check the computer system resource occupation, security protection, etc., and back up the stored data on site. 5.5.3.3 Monitoring equipment 1) Check the monitoring data and operating parameters of the monitoring equipment to determine whether the operation is normal. 2) Check whether the monitoring equipment is dusty, whether the interface is damaged or rusted, whether the connecting cable is damaged or aged, and whether the bracket and the louver box are rusted. Eclipse or breakage, check for loose connections and screws. 5.5.3.4 Sampling equipment 1) If the appearance is dusty, damaged or rusted, and it has an impact on sampling, it should be disposed of in time. 2) Clean and airtight the sampling pipeline, and remove the debris and water in the pipeline and sampling port in time. 3) Perform pipeline inspection on the sediment sampler (including water leakage inspection) and sensitivity test for dry and wet sensors. Check for heating in winter. Device. 4) Start the operation test of the aerosol and iodine sampler, the running time is more than half an hour, check whether the equipment is different during the running process. often. 5) If there is condensation water in the sampling equipment, adjust the temperature of the station room or take appropriate control measures on the sampling pipeline to prevent condensation. 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