GB/T 25451-2010 English PDFUS$149.00 · In stock
Delivery: <= 2 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 25451-2010: PHWR fuel element coating-measurement of thickness -- Beta backscatter method Status: Valid
Basic dataStandard ID: GB/T 25451-2010 (GB/T25451-2010)Description (Translated English): PHWR fuel element coating-measurement of thickness -- Beta backscatter method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: F48 Classification of International Standard: 27.120 Word Count Estimation: 5,598 Date of Issue: 2010-11-10 Date of Implementation: 2011-05-01 Regulation (derived from): Announcement of Newly Approved National Standards No. 8 of 2010 (total 163) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies the measurement of CANDU nuclear power plant fuel element package filled tube wall graphite coating thickness and the bottom surface of the support, isolation block on the side of the thickness of the iron coating feeds, standard samples, equipment and fixtures, measuring environmental conditions, measurement procedures, etc. content. This standard applies to CANDU nuclear power plant fuel element cladding tube wall graphite coating thickness measurement and supporting the bottom surface, isolated blocks side by side the amount of coating thickness, the amount can range from the side (0 ~ 30) ��m. GB/T 25451-2010: PHWR fuel element coating-measurement of thickness -- Beta backscatter method---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.PHWR fuel element coating-measurement of thickness. Beta backscatter method ICS 27.120 F48 National Standards of People's Republic of China CANDU nuclear power plant fuel element coating thickness measurement β-ray backscatter method Issued on. 2010-11-10 2011-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThe standard proposed by China National Nuclear Corporation. This standard by the National Standardization Technical Committee on Nuclear Energy (SAC/TC58) centralized. This standard was drafted. China North Nuclear Fuel Limited. The main drafters. Zhang Junjie, Li Aijun, Qi Junying, Zhang Jie, Han Ping Shan. CANDU nuclear power plant fuel element coating thickness measurement β-ray backscatter method1 ScopeThis standard specifies the CANDU nuclear power plant measuring fuel element cladding tube wall thickness of the graphite coating and the support bottom surface, the side of the isolation block Method summary beryllium coating thickness, standard samples, equipment and means for measuring the environmental conditions, measurement procedures and so on. This standard applies to CANDU nuclear power plant fuel element cladding tube wall graphite coating thickness measurement and support the bottom surface, the side of the isolation block Beryllium coating thickness measurements in a range of (0 ~ 30) μm.2 Terms and definitionsThe following terms and definitions apply to this standard. 2.1 The thickness of the equivalent standard thicknessequivalentstandard Under the same conditions, a substance of β-ray backscatter count rate and zirconium tube wall thickness of certain graphite coating of β-ray backscatter gauge Data rates are equal, then the substance is a graphite coating thickness equivalent standards. 2.2 Matrix substrate The coating material is coated directly.3 Method summaryβ-ray radiation emitted by the source into the coating from the substrate and coating are backscattered part of the rays, these rays are Geiger - Maitreya Counter coating thickness will vary and there are different after receiving the count rate, thickness according to the received scattered count rate to display the corresponding Coating thickness.4 standard samples4.1 Production and calibration standard sample Standard samples 4.1.1 beryllium coating 4.1.1.1 making different thickness beryllium coating sample (bearing pad can be coated with beryllium samples can also be coated zirconium plate beryllium sample) 8 to 10 And an uncoated bearing pad. 4.1.1.2 Under the same conditions, with a coating thickness gauge scattering samples were measured count rates. 4.1.1.3 select two samples as a measure of the remaining samples by other methods (such as optical microscopy measurements) Measurement of Coating thickness. 4.1.1.4 According to the test results and make the corresponding scattering curves count rate and the coating thickness. 4.1.1.5 drawn two standard coating thickness measurements according to the curve, use one of them as a standard, as another validation criteria. Standard samples 4.1.2 graphite coating 4.1.2.1 Production of graphite coating thickness of different samples (with zirconia coating as a graphite coating thickness equivalent standard, can also be stainless steel Materials such as the thickness of the equivalent standard) 8 to 10 and a non-coated zirconium tubes. 4.1.2.2 Press 4.1.1.2 ~ 4.1.1.5 executed. 4.2 Calibration standard sample Verify calibration with standard equipment, and then measured using a standard thickness value, if you are using a standard thickness measurement value and the nominal value of the deviation 3μm within the scope of the use of the standard can be used. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 25451-2010_English be delivered?Answer: Upon your order, we will start to translate GB/T 25451-2010_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 2 working days. 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