GB27742-2011

Activity concentration for material not requiring radiological regulation

可免于辐射防护监管的物料中放射性核素活度浓度

GB 27742-2011은(는) 현행 중국 강제 국가 표준입니다: Activity concentration for material not requiring radiological regulation. 산업: 의료. 주제: 제품 안전. 시행일: 2012년 12월 1일.

적용 여부는 제품 범위, 인증 경로, 주관 당국 공고, 전환 규정에 따라 달라집니다. 컴플라이언스 판단에 사용하기 전에 번역을 의뢰하거나 공식 출처를 확인하세요.

컴플라이언스 개요

이 개요는 현재 영어로만 제공됩니다.

적용 범위

This standard specifies the activity concentration for materials not requiring radiological regulation. It applies to the production, trade, landfill, or recycling of bulk materials (greater than 1 ton), but explicitly excludes food, drinking water, animal feed, airborne radon, and materials in transit. Engineers dealing with bulk raw materials or waste must verify if their products fall under this specific scope. It references GB 18871-2002 for certain exclusion scenarios.

기술 요구 사항

The standard establishes the basis for determining exemption concentrations for both natural and artificial radionuclides. For natural radionuclides, the basis is the activity concentration in undisturbed environmental soil, ensuring public dose does not exceed 1mSv/a. For artificial radionuclides, the dose criterion is set at the 10μSv/a level. These criteria are mandatory for determining if materials can bypass radiological regulation. It specifies the exemption concentration values for various radionuclides, including natural radionuclides, artificial radionuclides, and inert gases. For materials containing a mixture of different artificial radionuclides, a specific summation formula must be satisfied to ensure the combined ratio remains below 1. Compliance requires evaluating each radionuclide's concentration against the specified limits. The standard outlines the application of these exemption values, detailing regulatory requirements for materials used in building construction or those with slight contamination intended for recycling, such as steel, aluminum, nickel, and copper. It references GB 17567-2009 for the clearance levels of metals for recycling.

시험 방법

Verification of compliance involves laboratory analysis of representative samples to determine activity concentration. Alternatively, indirect methods such as on-site gamma dose rate screening, derivation of radionuclide content relationships, and traceability documentation reviews can be used. Any sampling and measurement methods must be reviewed and approved by the regulatory authority. Dilution of materials solely to meet exemption limits is strictly prohibited without consent.

자주 묻는 질문

What products are regulated under GB 27742-2011?

It regulates bulk materials (over 1 ton) involved in production, trade, landfill, or recycling, specifically focusing on their radionuclide activity concentration to determine if they can be exempt from radiological regulation.

Are there any updates from the previous version of GB 27742-2011?

This is the established 2011 version, referencing the IAEA Safety Guide RS-G-1.7. Engineers should ensure they are using the latest applicable version for current compliance.

How does GB 27742-2011 relate to international standards?

The standard was developed by referencing the IAEA Safety Guide 'Application of the Concepts of Exclusion, Exemption and Clearance' (No. RS-G-1.7), combined with China's specific national conditions.

The summary above provides a high-level overview of GB 27742-2011. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 27742-2011 today to access all detailed parameters, tables, and testing procedures.

적용 참고 사항

유형: 안전
CCS: F70
ICS: 17.240
주관 부처: Ministry of Ecology and Environment
기술 위원회: Ministry of Ecology and Environment