ISO 16796:2022 PDF

Nuclear energy — Determination of Gd2O3 content in gadolinium fuel blends and gadolinium fuel pellets by atomic emission spectrometry using an inductively coupled plasma source (ICP-AES)

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ISO 16796:2022

Nuclear energy — Determination of Gd2O3 content in gadolinium fuel blends and gadolinium fuel pellets by atomic emission spectrometry using an inductively coupled plasma source (ICP-AES)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 9
Дата публикации:: 17 января 2022 г.
Издание:: ISO IS 16796 edition 2 version 1
ICS:: 27.120.30

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Срок поставки:2 раб. дн. (перевод)

Цена:135 €

Описание (английский):

This document is applicable to the determination of gadolinium as Gd2O3 in powder blends and sintered pellets of Gd2O3 + UO2 and ((U, Gd) O2) from mass fraction 10 g/kg to 100 g/kg (i.e. 1 % to 10 %), using a suitable ICP-AES instrument. This methodology is capable of demonstrating compliance with agreed upon fuel specifications and associated data quality objectives provided the user has performed qualification measurements under their established measurement control program to demonstrate that measurement uncertainty requirements will be met with the desired level of confidence at the specification.

Технические детали

Технический комитет: ISO/TC 85/SC 5 - Nuclear installations, processes and technologies
SKU: ISO 16796:2022

Abstract

Overview

ISO 16796:2022 - "Nuclear energy - Determination of Gd2O3 content in gadolinium fuel blends and gadolinium fuel pellets by atomic emission spectrometry using an inductively coupled plasma source (ICP‑AES)" - specifies a validated laboratory method to quantify gadolinium (reported as Gd2O3) in nuclear fuel powder blends and sintered ((U,Gd)O2) pellets. The method covers mass fractions from 10 g/kg to 100 g/kg (1 % to 10 %) and is intended for routine compliance testing when used within an established measurement control program.

Key topics and technical requirements

Analytical principle: Dissolve weighed sample in nitric acid, aspirate into an ICP‑AES, and measure the gadolinium emission line at 335.0 nm; emitted intensity is proportional to Gd concentration.
Applicable sample types: Powder blends of Gd2O3 + UO2 and sintered (U,Gd)O2 pellets.
Quantitation range: 10 g/kg to 100 g/kg (1–10 % Gd2O3).
Apparatus & consumables: ICP‑AES instrument, analytical balance (±0.1 mg sensitivity), three‑dimensional shaker, hot plate, micropipettes, volumetric flasks, percussion mortar, pellet press, and muffle furnace.
Reference materials & reagents: High‑purity Gd2O3 (≥999.9 g/kg) and nuclear‑grade UO2 reference materials; concentrated and diluted nitric acid; demineralized water meeting ISO 3696 Grade 2.
Sample preparation: Typical procedure uses 5.0 g aliquots; powders dissolved and diluted through specified volumetric steps. Pellets are crushed, ashed in a muffle furnace at 420 °C ± 25 °C for 2–3 h, then processed like powders.
Calibration & QC: Calibration curves from traceable standards that bracket the measurement range; laboratories must define acceptance criteria (e.g., regression fit, R²). Independence of calibration and QC reference materials is required where practical.
Measurement control: Users must perform qualification and uncertainty characterization under their measurement control program to demonstrate compliance with fuel specifications and data quality objectives.
Interferences: No impurity interferences observed for typical nuclear‑grade materials (per standard text).

Applications and users

Primary users: Nuclear fuel manufacturers, fuel quality control laboratories, regulatory bodies, and materials testing labs involved in fuel fabrication and incoming inspection.
Practical uses: Routine verification of gadolinium burnable absorber loading, batch release testing of blended powders and pellets, and compliance checks against fuel specifications.

Related standards

ISO 3696 - Water for analytical laboratory use (referenced for demineralized water quality)
ASTM C1128 - Guidance on preparing working reference materials (informative guidance cited)

Keywords: ISO 16796:2022, Gd2O3 determination, gadolinium fuel blends, ICP‑AES, nuclear fuel quality control, (U,Gd)O2 pellets, calibration, measurement uncertainty.

Overview

Key topics and technical requirements

Analytical principle: Dissolve weighed sample in nitric acid, aspirate into an ICP‑AES, and measure the gadolinium emission line at 335.0 nm; emitted intensity is proportional to Gd concentration.
Applicable sample types: Powder blends of Gd2O3 + UO2 and sintered (U,Gd)O2 pellets.
Quantitation range: 10 g/kg to 100 g/kg (1–10 % Gd2O3).
Apparatus & consumables: ICP‑AES instrument, analytical balance (±0.1 mg sensitivity), three‑dimensional shaker, hot plate, micropipettes, volumetric flasks, percussion mortar, pellet press, and muffle furnace.
Reference materials & reagents: High‑purity Gd2O3 (≥999.9 g/kg) and nuclear‑grade UO2 reference materials; concentrated and diluted nitric acid; demineralized water meeting ISO 3696 Grade 2.
Sample preparation: Typical procedure uses 5.0 g aliquots; powders dissolved and diluted through specified volumetric steps. Pellets are crushed, ashed in a muffle furnace at 420 °C ± 25 °C for 2–3 h, then processed like powders.
Calibration & QC: Calibration curves from traceable standards that bracket the measurement range; laboratories must define acceptance criteria (e.g., regression fit, R²). Independence of calibration and QC reference materials is required where practical.
Measurement control: Users must perform qualification and uncertainty characterization under their measurement control program to demonstrate compliance with fuel specifications and data quality objectives.
Interferences: No impurity interferences observed for typical nuclear‑grade materials (per standard text).

Applications and users

Primary users: Nuclear fuel manufacturers, fuel quality control laboratories, regulatory bodies, and materials testing labs involved in fuel fabrication and incoming inspection.
Practical uses: Routine verification of gadolinium burnable absorber loading, batch release testing of blended powders and pellets, and compliance checks against fuel specifications.

Related standards

ISO 3696 - Water for analytical laboratory use (referenced for demineralized water quality)
ASTM C1128 - Guidance on preparing working reference materials (informative guidance cited)

Keywords: ISO 16796:2022, Gd2O3 determination, gadolinium fuel blends, ICP‑AES, nuclear fuel quality control, (U,Gd)O2 pellets, calibration, measurement uncertainty.

ISO 16796:2022 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Похожие стандарты

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Похожие стандарты

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

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