SN/T 3813-2014 English PDF

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SN/T 3813-2014: Rapid determination of radionuclides for natural stone
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 3813-2014	209	Add to Cart	3 days	Rapid determination of radionuclides for natural stone	Valid

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Basic data

Standard ID: SN/T 3813-2014 (SN/T3813-2014)
Description (Translated English): Rapid determination of radionuclides for natural stone
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: D50
Classification of International Standard: 73.080
Word Count Estimation: 8,843
Quoted Standard: GB 6566
Regulation (derived from): AQSIQ notification issued in 2014 on the first batch of 230 industry-standard entry-exit inspection and quarantine
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the natural stone radionuclide radium 226, thorium 232, potassium 40 than the rapid detection of activity. This standard applies to natural stone radionuclide radium 226, thorium 232, potassium 40 Determination of specific activity

SN/T 3813-2014: Rapid determination of radionuclides for natural stone

---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.
(Natural Stone rapid analysis of radionuclides) People's Republic of China Entry-Exit Inspection and Quarantine Standards Natural stone radionuclides rapid analysis method Issued on. 2014-01-13 2014-08-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. People's Republic of China, Xiamen Entry-Exit Inspection and Quarantine Bureau Technology Center. The main drafters of this standard. Lin Zhenji, Caiji Jie, Ma Qiang, Qiu Nanxi, Sun Dehua, Yao Xiangrong, Huang Weidong. Natural stone radionuclides rapid analysis method

1 Scope

This standard specifies the natural stone radionuclide radium 226, thorium 232, potassium 40 than the rapid detection of activity. This standard applies to natural stone radionuclide radium 226, thorium 232, potassium 40 Determination of specific activity.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB 6566 building materials radionuclide limits

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Natural stone naturalstone After selection and processing of natural rock special size or shape, according to the material is divided into marble, granite, limestone, sandstone, board Stone, according to the purpose can be divided into natural building stone and natural stone and other decorative. Note. During the processing of natural stone using cement or synthetic resin seal natural stone gaps and cracks, does not change the internal structure of the stone material, natural stone belongs Material category. 3.2 Natural radionuclides naturalradionuclide Naturally occurring radionuclides. Within the usual time frame that its activity is unchanged. 3.3 Radioactivity radioactivity At a given moment, in a certain amount of a particular energy state of a certain radionuclide activity is dN A dt obtained by dividing the quotient see equation (1). A = dN/dt (1) Where. dN --- within the time interval dt, the number of nuclides spontaneous nuclear transitions from that energy state happen expectations. 3.4 Specific activity specificactivity Unit mass of a substance (radioactivity) activity. 3.5 The bottom (count) background (count) In the test without the presence of the radiation source, the inherent count measuring means. These counts from cosmic rays, put the surrounding environment Radioactive material and radioactive contamination of the detector itself.

4 Standard

Body standard source. body standard source to be detected using the same sample size, the same material sample box. Standard matrix precursor source with the sample to be detected ......

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