SN/T 1537-2023 PDF EnglishUS$140.00 · In stock · Download in 9 seconds
SN/T 1537-2023: Rules for the inspection of radioactivity of imported minerals Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid SN/T 1537: Historical versions
Similar standardsSN/T 1537-2023: Rules for the inspection of radioactivity of imported minerals---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/SNT1537-2023SN ENTRY-EXIT INSPECTION AND QUARANTINE INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 73.010 CCS D 04 Replacing SN/T 1537-2005 Rules for the inspection of radioactivity of imported minerals ISSUED ON: MAY 05, 2023 IMPLEMENTED ON: DECEMBER 01, 2023 Issued by: General Administration of Customs of the PRC Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 5 4 On-site inspection ... 6 5 Determination of test results... 8ForewordThis document is drafted in accordance with the provisions of GB/T 1.1-2020 "Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents". This document replaces SN/T 1537-2005 "Rules of radioactivity inspection for import minerals". Compared with SN/T 1537-2005, in addition to structural adjustments and editorial changes, the main technical changes are as follows: a) DELETE the definition of inspection lot (see Chapter 3; 3.1 of the 2005 edition); b) CHANGE the description of instruments and equipment (see 4.2; 4.2 of the 2005 edition); c) CHANGE the description of the standard for inspection personnel protection (see 4.3; 4.3 of the 2005 edition); d) CHANGE the background measurement method (see 4.4.1; 4.4.1 of the 2005 edition); e) ADD the calculation method of dose equivalent rate (see 4.4.2); f) CHANGE the radioactivity measurement method (see 4.4.3 and 4.4.4; 4.4.2 and 4.4.3 of the 2005 edition); g) ADD radionuclide activity concentration test (see 4.4.5); h) CHANGE the judgment of test results (see Chapter 5; Chapter 5 of the 2005 edition); i) ADD the requirements for natural radioactivity test and conformity assessment of non-ferrous metal mineral products, such as copper, lead, zinc, tin, nickel, cobalt (see 5.1). Please note that some contents of this document may involve patents. The issuing agency of this document does not assume the responsibility for identifying patents. This document was proposed by and shall be under the jurisdiction of the General Administration of Customs of the People's Republic of China. The drafting organizations of this document: Qingdao Customs of the People's Republic of China, Huangdao Customs of the People's Republic of China, Yantai Customs of the People's Republic of China. The main drafters of this document: Qi Jialin, Chen Zhe, Qu Zhiyong, Zou Wenwen, Wang Chonglin, Wu Chunrong, Guo Qiang, Ma Li, Liu Yanyu, Liu Sai. Rules for the inspection of radioactivity of imported minerals1 ScopeThis document specifies the inspection methods and result determination of radioactivity of imported mineral products. This document applies to radioactivity inspection of imported mineral products transported by container or bulk.2 Normative referencesThe contents of the following documents constitute essential clauses of this document through normative references in the text. Among them, for dated reference documents, only the version corresponding to that date applies to this document; for undated reference documents, the latest version (including all amendments) applies to this document. GB/T 4835.1 Radiation protection instrumentation - Ambient and/or directional dose equivalent (rate) meters and/or monitors for β, X, γ radiation - Part 1: Portable workplace and environmental meters and monitors GB/T 4960.5 Glossary of terms: Nuclear science and technology - Radiation protection and safety of radiation sources GB 18871 Basic standards for protection against ionizing radiation and for the safety of radiation sources GB 20664 Limitation concentration of natural radioactivity in nonferrous metal ores and concentrates products GB 27742 Activity concentration for material not requiring radiological regulation3 Terms and definitionsThe terms and definitions as defined in GB/T 4960.5 apply to this document. 4.4.3 Radioactivity measurement of containerized mineral products 4.4.3.1 Measurement outside the container 4.4.3.1.1 Measure the front, back, left, and right sides of each container. 4.4.3.1.2 Place the probe of the detector close to the outer wall of the container. Find the highest point of the γ-ray dose equivalent rate on each surface. Repeat the measurement 5 times (10s interval) at the highest point of each surface. Take the average value of the 5 measurements as the γ-ray dose equivalent rate of the surface. 4.4.3.1.3 Take the highest equivalent rate in the entire detection process as the γ-ray dose equivalent rate of the inspected products. 4.4.3.1.4 If the γ-ray dose equivalent rate on any surface measured outside the box exceeds 5 times the environmental radiation background value, the box shall be opened for inspection. 4.4.3.2 Container unpacking measurement Open the container door. Place the probe of the detector 10 cm away from the mineral product, to find the highest point of the γ-ray dose equivalent rate. Repeat the measurement 5 times (10s interval) at the highest point. Take the average value of the 5 measurements as the γ-ray dose equivalent rate of the box. 4.4.4 Radioactivity measurement of bulk mineral products 4.4.4.1 Bulk mineral products transported by ship 4.4.4.1.1 For bulk mineral products transported by ship, for batches below 1500 t, at least 4 inspections shall be conducted at the beginning of unloading, when 1/3, 2/3 of the total cargo is unloaded, and at the end of unloading; for batches above 1500 t, a measurement shall be conducted every 500 t. 4.4.4.1.2 Use the grab bucket of the loading and unloading machinery to randomly grab not less than 50 t of mineral products from different parts of the cargo surface in the hold; bring them to the inspection site. Pile them into a flat cargo pile with a thickness of ≥ 1 m and a top diameter of ≥ 2 m. Place the probe of the detector at 0.1 m above the top surface of the cargo pile. Find the highest point of the γ-ray dose equivalent rate;. Repeat the measurement 5 times (10s interval) at the highest point. Take the average value of the 5 measurements as the γ-ray dose equivalent rate of the batch of mineral products measured at that time. 4.4.4.1.3 Take the highest equivalent rate in the entire detection process as the γ-ray dose equivalent rate of the inspected goods. 4.4.4.2 Bulk mineral products transported by land ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of SN/T 1537-2023 be delivered?Answer: The full copy PDF of English version of SN/T 1537-2023 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of SN/T 1537-2023_English with my colleagues?Answer: Yes. 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