日本語の概要・翻訳のご依頼可
GB20664-2006
Limitation concentration of natural radioactivity in non-ferrous metal ores and concentrates products
有色金属矿产品的天然放射性限值
GB 20664-2006 は現行の中国強制国家規格です：Limitation concentration of natural radioactivity in non-ferrous metal ores and concentrates products。 業界：環境。テーマ：環境保護。 施行日：2007年5月1日。
適用可否は製品範囲、認証ルート、所管当局の通知、移行規定によって異なります。コンプライアンス判断に使う前に、翻訳をご依頼いただくか公式情報源をご確認ください。
コンプライアンス概要
この概要は現在英語のみで提供しています。
適用範囲
GB 20664-2006 specifies the limitation concentration of natural radioactivity in non-ferrous metal ores and concentrates products. It applies to the exploitation and utilization of ores including copper, lead, zinc, tin, nickel, and cobalt. This standard is mandatory for managing radioactive hazards in these mineral products, and other mineral products may also refer to its provisions.
技術要求
Chapter 4 of the standard establishes mandatory requirements for both natural and artificial radioactivity. It sets strict activity concentration limits for specific natural radionuclides, such as those in the Uranium-238, Radium-226, and Thorium-232 decay chains, as well as Potassium-40. Additionally, the standard defines a screening level based on the gamma-radiation dose rate measured at a specific distance from the ore pile. If the measured dose rate is below this screening level, the product is considered to meet the activity concentration limits without needing further complex laboratory analysis. Furthermore, the standard strictly prohibits non-ferrous metal ore products from being contaminated by, or mixed with, artificial radionuclides or radioactive sources.
試験方法
The standard outlines a two-tier testing program. The first step is on-site screening using portable gamma-radiation dose rate meters to measure the surface dose rate of bulk or containerized ores. If the screening level is exceeded, laboratory nuclide analysis is conducted using gamma spectrometry according to GB/T 11713. The standard also details specific sampling and sample preparation methods (including conveyor belt, truck, container, and ship cabin sampling) to ensure representative laboratory analysis.
よくある質問
What products are regulated under GB 20664-2006?
The standard applies to the exploitation and utilization of non-ferrous metal ores and concentrates, specifically including copper, lead, zinc, tin, nickel, and cobalt. Other mineral products may also refer to this standard for compliance.
How does GB 20664-2006 relate to international standards?
It is based on the International Atomic Energy Agency (IAEA) Safety Guide RS-G-1.7 and incorporates China's practical experience in radioactive inspection of non-ferrous metal ores. It sets specific national limits for natural radionuclides and artificial contamination.
What happens if a product exceeds the gamma radiation screening level?
If the screening level is exceeded, the ore must be sampled and sent to a laboratory for radionuclide analysis to determine the exact activity concentration. If a localized 'hot spot' is found, further qualitative analysis is required to check for artificial radioactive contamination.
The summary above provides a high-level overview of GB 20664-2006. To ensure complete compliance for your mineral 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 20664-2006 today to access all detailed parameters, sampling tables, and testing procedures.
適用のヒント
- 種別
- 環境保護
- CCS
- D40
- ICS
- 73.060
- 所管部門
- Ministry of Ecology and Environment
- 技術委員会
- Ministry of Ecology and Environment