SIST EN ISO 21613:2018 PDF

Name: SIST EN ISO 21613:2018 — (U, Pu)O2 Powders and sintered pellets - Determination of chlorine and fluorine (ISO 21613:2015)
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(U, Pu)O2 Powders and sintered pellets - Determination of chlorine and fluorine (ISO 21613:2015)

Название (английский):

SIST EN ISO 21613:2018

(U, Pu)O2 Powders and sintered pellets - Determination of chlorine and fluorine (ISO 21613:2015)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 19
Дата публикации:: 19 декабря 2017 г.
Издание:: ISO 21613:2015
ICS:: 27.120.30

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Описание (английский):

ISO 21613:2015 describes a method for determining chlorine and fluorine in mixed (U,Pu)O2 powders and sintered pellets. It is applicable for the analysis of samples containing 5 µg.g−1 to 50 µg.g−1 of chlorine and 2 µg.g−1 to 50 µg.g−1of fluorine. For UO2 powder and sintered pellets, refer to ISO 22875.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 21613:2017 (identical to ISO 21613:2015) specifies a standardized analytical method for the determination of chlorine and fluorine in mixed uranium–plutonium oxide-(U,Pu)O2-powders and sintered pellets. The procedure uses pyrohydrolysis (850–1 000 °C) with steam or moist oxygen to convert halogens to acidic forms that are trapped in an aqueous receiver and quantified. The method is applicable to samples containing 5 µg·g−1 to 50 µg·g−1 chlorine and 2 µg·g−1 to 50 µg·g−1 fluorine. For pure UO2 materials, see ISO 22875.

Key topics and requirements

Principle: Pyrohydrolysis of (U,Pu)O2 at 850–1 000 °C; halogens volatilize as acids and are collected in an alkaline receiving solution.

Analytical measurement: Quantification by fluoride and chloride selective electrodes or ion-exchange (ion) chromatography.

Reagents and calibration: Use analytical-grade reagents (NaCl, NaF, NaOH, buffer solutions) and prepared chloride/fluoride reference solutions for electrode/IC calibration.

Equipment: Tubular furnace for pyrohydrolysis, gas/steam supply (moist oxygen), receiving vessels (alkaline NaOH buffer), ion analysis systems or selective electrode setups, standard laboratory glassware and mortar for sample preparation.

Quality control: The standard includes procedures for blanks, calculation and expression of results, validation limits, determination limits and estimation of measurement uncertainty.

Scope limits: Explicit concentration ranges for reliable quantification; additional normative references (ISO 3696, ISO 22875, ISO 9892) are cited.

Applications and users

Nuclear fuel manufacturing and quality control: Routine monitoring of halogen contamination in mixed oxide (MOX) feed powders and sintered fuel pellets to ensure material purity and performance.

Analytical laboratories: Laboratories performing trace-level halogen analysis in radioactive or fissile materials where standardized, validated methods are required.

Regulatory and R&D: Compliance testing, process development, failure investigation and material characterization for fuel technology and radiological protection research.

Why it matters: Chlorine and fluorine impurities affect sintering behavior, corrosion and long-term fuel performance; this standard provides a reproducible, validated route for trace halogen determination in MOX fuels.

Related standards

ISO 22875 - Determination of chlorine and fluorine in UO2 powder and sintered pellets

ISO 3696 - Water for analytical laboratory use (reagent water quality)

ISO 9892 - Fluoride ion selective electrode methods for uranium compounds

Keywords: EN ISO 21613:2017, ISO 21613:2015, (U,Pu)O2, chlorine and fluorine determination, pyrohydrolysis, ion chromatography, fluoride selective electrode, nuclear fuel quality, sintered pellets, MOX powder.

SIST EN ISO 21613:2018 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

ISO 21613:2015

(U, Pu)O2 Powders and sintered pellets — Determination of chlorine and fluorine

BS ISO 22875:2017

Nuclear energy. Determination of chlorine and fluorine in uranium dioxide powder and sintered pellets.

SIST EN ISO 3696:1998

Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)

ISO 9892:1992

Uranium metal, uranium dioxide powder and pellets, and uranyl nitrate solutions — Determination of fluorine c…