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JJG 521-2024 English PDF

Q: How long will the true-PDF of English version of JJG 521-2024 be delivered?

Upon your order, we will start to translate JJG 521-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Q: Can I share the purchased PDF of JJG 521-2024_English with my colleagues?

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Q: Do you accept my currency other than USD?

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Q: Should I purchase the latest version JJG 521-2024?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 521-2024 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$379.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 521-2024: Verification Regulation of X and Gamma Radiation Air Kerma Ratemeters for Environmental Monitoring
Status: Valid

JJG 521: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 521-2024	379	Add to Cart	4 days	Verification Regulation of X and Gamma Radiation Air Kerma Ratemeters for Environmental Monitoring	Valid
JJG 521-2006	499	Add to Cart	4 days	Verification Regulation of X and Gadiation Air Kerma Ratemeters for Environmental Monitoring	Valid
JJG 521-1988	399	Add to Cart	3 days	Verification Regulation of X or γ Radiation Meters for Environmontal Monitoring Absorbed Dose Rate in Air	Obsolete

Basic data

Standard ID: JJG 521-2024 (JJG521-2024)
Description (Translated English): Verification Regulation of X and Gamma Radiation Air Kerma Ratemeters for Environmental Monitoring
Sector / Industry: Metrology & Measurement Industry Standard
Word Count Estimation: 18,196
Date of Issue: 2024-09-18
Date of Implementation: 2025-03-18
Issuing agency(ies): State Administration for Market Regulation

JJG 521-2024: Verification Regulation of X and Gamma Radiation Air Kerma Ratemeters for Environmental Monitoring

---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.
National Metrology Verification Regulations of the People's Republic of China X-ray and gamma irradiation air for environmental monitoring Verification procedures for kerma rate meters Released on 2024-09-18 2025-03-18 Implementation The State Administration for Market Regulation issued X-ray and gamma irradiation air for environmental monitoring Verification procedures for kerma rate meters Replace JJG 521-2006 Responsible unit. National Technical Committee for Ionizing Radiation Metrology Drafting unit. Shanghai Institute of Metrology and Testing Technology China National Institute of Metrology Shenzhen Institute of Metrology and Quality Inspection China Testing Technology Research Institute This regulation is entrusted to the National Technical Committee for Ionizing Radiation Metrology for interpretation. Drafters of this Regulation. Chen Jianxin (Shanghai Institute of Metrology and Testing Technology) Yuan Jie (Shanghai Institute of Metrology and Testing Technology) Li Dehong (China National Institute of Metrology) Wang Sili (Shenzhen Institute of Metrology and Quality Inspection) Fan Jie (China Testing Technology Research Institute)

Introduction (II) 1 Scope(1) 2 References(1) 3 Terminology and units of measurement (1) 3.1 Terminology (1) 3.2 Units of measurement (2) 4 Overview(2) 5 Metrological performance requirements (2) 6 General technical requirements (2) 6.1 Appearance(2) 6.2 Identification (2) 6.3 Reading display (2) 7 Measuring instrument control (3) 7.1 Verification conditions (3) 7.2 Verification Items (4) 7.3 Verification methods (4) 7.4 Processing of test results (6) 7.5 Verification cycle (6) Appendix A Recommended format for verification records (7) Appendix B Information on the inner pages of the verification certificate and recommended format (8) Appendix C Information and recommended format for the inner page of the verification result notification (9) Appendix Characteristics and Generation Conditions of DX Reference Radiation (10) Appendix E Calibration of air kerma ratemeter under low radiation conditions (11)

Introduction

JJF1071-2010 "Rules for the Preparation of National Measurement and Calibration Specifications", JJF1001-2011 "General Measurement Terms and Definition” and JJF1059.1-2012 “Evaluation and Expression of Uncertainty in Measurement” together constitute the basis for the formulation of this specification. A series of basic specifications. This regulation is a revision of JJG 521-2006 "Air kerma (absorbed dose) rate of X-ray and gamma radiation for environmental monitoring" The revision of the "Regulations for the Verification of Radiation Protection Instruments" is based on IEC 61017.2016 "Mobile and portable environmental monitoring equipment for radiation protection instruments" GB/T 4835.1-2012 Radiation protection instruments - Beta, X and gamma radiation ambient and/or directional dose equivalent (rate) instruments and / or monitoring instruments Part 1.Portable workplace and environmental measuring instruments and monitoring instruments", GB/T 12162.1 " X-ray and gamma reference radiation for calibrating dosimeters and dose rate meters and determining their energy response - Part 1.Radiation characteristics GB/T 12162.2 "X and γ for calibrating dose meters and dose rate meters and determining their energy response" Reference Radiation Part 2.Energy range for radiation protection is 8keV~1.3Me", GB/T 12162.3 "Use X-ray and gamma reference radiation for calibrating dosimeters and dose rate meters and determining their energy response - Part 3.Occupational dose The main technical reference is "Calibration of Dosimeters and Personal Dosimeters and Determination of Their Energy Response and Angular Response". Compared with JJG 521-2006, the main technical changes of this regulation are as follows. 1) With reference to IEC 61017.2016 and GB/T 4835.1-2012, the name of the regulation is changed from "X, γ The "Radiation Air Kerma (Absorbed Dose) Rate Meter Verification Procedure" was revised to "X and γ Radiation Air Kerma (Absorbed Dose) Rate Meter Verification Procedure for Environmental Monitoring" "Kinematic Energy Release Rate Meter Calibration Procedure"; 2) Cancel "overload characteristics" and "incident angle response" in the verification items; 3) Reference to the metrological performance requirements and verification methods for the items of “relative inherent error, repeatability, and energy response” The technical requirements and test methods of IEC 61017.2016 and GB/T 4835.1-2012 are modified accordingly; 4) Add “Incident Angle Response Measurement Method” to the Appendix. The previous versions of this regulation are as follows. ---JJG 521-2006; ---JJG 521-1988. X-ray and gamma irradiation air for environmental monitoring Verification procedures for kerma rate meters

1 Scope

This regulation applies to portable, mobile and fixed instruments for measuring ambient X-ray and gamma radiation air kerma rate Initial calibration, subsequent calibration and in-use inspection. Air kinetic energy rate K a is produced by external irradiation of X-ray and gamma radiation, The energy range of X-ray and gamma radiation is 80keV~1.5MeV; the air kerma rate range is not less than 30nGy/h~ 30μGy/h. This procedure is not applicable to the calibration of instruments for measuring ambient X-ray and gamma radiation air kerma (cumulative amount), nor is it applicable to For film dosimeters, thermoluminescent dosimeters (TLD), optically stimulated luminescence (OSL) dosimeters, and reflective glass luminescence (RPL) The calibration of passive detection devices such as dosimeters or quartz wire electrometers is not applicable to the measurement of beta and neutron radiation. system.

2 References

This regulation refers to the following documents. JJF1001 General metrological terms and definitions JJF1035 Ionizing radiation measurement terms and definitions GB/T 4835.1-2012 Radiation protection equipment - Ambient and/or directional dose equivalent (rate) of β, X and γ radiation Instruments and/or monitors Part 1.Portable workplace and environmental measuring instruments and monitors GB/T 4960.1 Terminology of Nuclear Science and Technology Part 1.Nuclear Physics and Nuclear Chemistry GB/T 4960.6 Terminology of Nuclear Science and Technology Nuclear Instruments GB/T 12162.1 X-ray and gamma reference radiation for calibrating dose meters and dose rate meters and determining their energy response Part 1.Radiation characteristics and generation methods GB/T 12162.2 X-ray and gamma reference radiation for calibrating dose meters and dose rate meters and determining their energy response Radiation protection for energy range 8keV~1.3Me IEC 61017.2016 Radiation protection instrumentation for environmental monitoring, mobile, portable or fixed photon radiation For any referenced document with a date, only the version with the date is applicable to this Regulation; for any referenced document without a date, The latest version (including all amendments) shall apply to this regulation.

3 Terminology and units of measurement

3.1 Terminology The following terms and definitions defined in JJF1001, JJF1035, GB/T 4960.1, GB/T 4960.6 apply ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 521-2024_English be delivered?

Answer: Upon your order, we will start to translate JJG 521-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 521-2024_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 521-2024_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. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version JJG 521-2024?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 521-2024 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.