ISO 21614:2008 PDF

Name: ISO 21614:2008 — Determination of carbon content of UO2, (U, Gd)O2 and (U, Pu)O2 powders and sintered pellets — Combustion in a high-frequency induction furnace — Infrared absorption spectrometry
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Determination of carbon content of UO2, (U, Gd)O2 and (U, Pu)O2 powders and sintered pellets — Combustion in a high-frequency induction furnace — Infrared absorption spectrometry

Название (английский):

ISO 21614:2008

Determination of carbon content of UO2, (U, Gd)O2 and (U, Pu)O2 powders and sintered pellets — Combustion in a high-frequency induction furnace — Infrared absorption spectrometry

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 4
Дата публикации:: 27 ноября 2008 г.
Издание:: ISO IS 21614 edition 1 version 1
ICS:: 27.120.20

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Описание (английский):

ISO 21614:2008 describes a method for determining the carbon content in UO2, (U,Gd)O2 and (U,Pu)O2 powder and sintered pellets by combustion in an induction furnace and infrared absorption spectroscopy measurement. ISO 21614:2008 is applicable for determining 10 µg/g to 500 µg/g of carbon in UO2, (U,Gd)O2 and (U,Pu)O2 powder and pellets.

Abstract

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Overview

ISO 21614:2008 is an international standard published by the International Organization for Standardization (ISO) that specifies a precise method for determining the carbon content in nuclear fuel materials. Specifically, it addresses the measurement of carbon in uranium dioxide (UO2), uranium-gadolinium dioxide ((U,Gd)O2), and uranium-plutonium dioxide ((U,Pu)O2) powders and sintered pellets. The method relies on combustion in a high-frequency induction furnace followed by infrared absorption spectrometry, enabling the quantification of carbon concentrations ranging from 10 µg/g to 500 µg/g.

This standard plays a critical role in nuclear fuel manufacturing and quality control processes, ensuring that carbon impurities are effectively monitored and controlled to meet stringent safety and performance specifications.

Key Topics

Carbon Determination Method The sample is heated above 1500 °C in an induction furnace under an oxygen atmosphere, converting all carbon compounds to carbon dioxide (CO2). The CO2 released is dried, filtered, and quantified using infrared absorption spectrometry at 2350 cm⁻¹, allowing highly accurate carbon content measurement.

Materials Covered Applicable to UO2, (U,Gd)O2, and (U,Pu)O2 powders and sintered pellets, which are common nuclear fuel materials.

Range of Measurement Effective for detecting carbon content between 10 µg/g (micrograms per gram) and 500 µg/g, supporting trace-level analysis.

Required Reagents and Equipment Includes high-purity oxygen gas, sodium hydroxide and magnesium perchlorate traps for CO2 purification, tungsten catalyst, alumina crucibles, and an advanced carbon analyzer with a high-frequency induction furnace equipped with infrared spectrometry capabilities.

Sample Preparation and Handling Powder samples require no special preparation, whereas sintered pellets must be ground cautiously to prevent excessive fines.

Quality Control and Calibration Utilizes certified reference materials and routine blank and calibration checks to ensure measurement accuracy and repeatability.

Performance Metrics The method boasts analytical accuracy within ±2% for lower carbon contents and improved precision (~6%) for higher concentrations, with a detection limit as low as 10 µg.

Applications

Nuclear Fuel Quality Control Essential for monitoring carbon impurities in uranium-based fuels used in nuclear reactors to maintain fuel integrity and reactor safety.

Fuel Fabrication Process Optimization Enables manufacturers to assess the carbon content at various stages, facilitating process adjustments to meet specification.

Research and Development Assists in developing and studying novel fuel compositions, including mixed oxides such as those containing gadolinium or plutonium.

Regulatory Compliance Provides a standardized testing method ensuring that carbon content measurements meet international nuclear regulatory requirements.

Material Certification Supports certification and validation of nuclear fuel batches, improving traceability and quality assurance.

Related Standards

ISO/TC 85 Series ISO 21614:2008 is part of the ISO Technical Committee 85 portfolio focusing on nuclear energy and fuel technology standards.

Nuclear Material Analysis Standards Complementary to other ISO methods dealing with elemental and isotopic analysis in nuclear materials.

ISO 17025 Laboratories using this method often require accreditation per ISO/IEC 17025 to demonstrate competence in testing and calibration.

Summary

ISO 21614:2008 delivers a rigorously defined procedure for accurately determining trace carbon levels in critical nuclear fuel forms using combustion and infrared absorption techniques. Its application spans manufacturing, quality control, research, and regulatory fields within the nuclear energy sector. The standard’s detailed methodology and equipment specifications ensure consistent, reliable measurements, supporting safe and efficient use of nuclear fuels worldwide. Adopting ISO 21614:2008 helps maintain nuclear fuel purity, optimize fabrication processes, and comply with international quality and safety standards.

ISO 21614:2008 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

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Summary

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