ISO 18213-5:2008 PDF

Nuclear fuel technology — Tank calibration and volume determination for nuclear materials accountancy — Part 5: Accurate determination of liquid height in accountancy tanks equipped with dip tubes, fast bubbling rate

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Название (английский):

ISO 18213-5:2008

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 10 марта 2008 г.
Издание:: ISO IS 18213 edition 1 version 1
ICS:: 27.120.30

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Срок поставки:3 раб. дн. (перевод)

Цена:195 €

Описание (английский):

ISO 18213-5:2008 specifies a procedure for making accurate determinations of liquid height in nuclear-materials-accountancy tanks that are equipped with pneumatic systems for determining the liquid content. With such systems, gas is forced through a probe (dip tube) whose tip is submerged in the tank liquid. The pressure required to induce bubbling is measured with a manometer located at some distance from the tip of the probe. This procedure applies specifically when a fast bubbling rate is employed.

Технические детали

Технический комитет: ISO/TC 85/SC 5 - Nuclear installations, processes and technologies
SKU: ISO 18213-5:2008

Abstract

Overview

ISO 18213-5:2008 - Nuclear fuel technology specifies a validated procedure for accurately determining liquid height in nuclear-materials-accountancy tanks that use bubbler (dip tube) systems. This part of ISO 18213 applies specifically when a fast bubbling rate is employed: gas is forced through a submerged dip tube and the pressure required to induce bubbling is measured with a manometer. Results are used to build or verify tank calibration and volume measurement equations for nuclear materials accountancy.

Key topics and technical requirements

Measurement principle: hydrostatic relation between pressure, liquid height and liquid density (P = g·H·ρ) underpins the method.
System configuration: use of a major (immersed) probe and a reference probe above the liquid surface; manometer located at a fixed elevation.
Fast bubbling-rate adjustments: Clause 4 describes corrections needed when bubbling is fast - accounting for gas column mass, flow resistance, bubble formation effects, surface tension and pressure drops in probe lines.
Equipment and procedures: Clause 3 references required hardware, operating conditions and stepwise measurement procedures (see ISO 18213-1 for system descriptions and procedural overview).
Standardization & environmental effects: temperature and density variation, atmospheric/off‑gas pressures and other factors affecting comparability of measurements are recognized; data standardization algorithms are addressed in ISO 18213-2.
Uncertainty and statistical treatment: methods for estimating measurement uncertainty and statistical analysis of calibration data are provided in ISO 18213-3.

Practical applications and users

Primary users: instrumentation engineers, metrology teams, nuclear fuel facility operators, safeguards/accountancy professionals and calibration laboratories engaged in nuclear materials accountancy.
Typical uses:
- Calibrating process tanks by correlating known added volumes to measured liquid height.
- Determining in-service process liquid volumes for inventory and material balance calculations.
- Validating transfer volumes where siphon levels or indirect methods are used.
Why it matters: accurate height-to-volume relationships reduce systematic inventory errors, support regulatory compliance, and improve safeguards reporting.

Related standards

ISO 18213-1: Procedural overview (tank calibration & volume determination)
ISO 18213-2: Data standardization for tank calibration
ISO 18213-3: Statistical methods & uncertainty estimation
ISO 18213-4: Liquid height determination for slow bubbling rate (complementary method)
ISO 18213-6: In-tank determination of liquid density

Keywords: ISO 18213-5:2008, nuclear fuel technology, tank calibration, volume determination, liquid height, dip tubes, bubbler probe, fast bubbling rate, manometer, hydrostatic pressure, nuclear materials accountancy.

Overview

Key topics and technical requirements

Measurement principle: hydrostatic relation between pressure, liquid height and liquid density (P = g·H·ρ) underpins the method.
System configuration: use of a major (immersed) probe and a reference probe above the liquid surface; manometer located at a fixed elevation.
Fast bubbling-rate adjustments: Clause 4 describes corrections needed when bubbling is fast - accounting for gas column mass, flow resistance, bubble formation effects, surface tension and pressure drops in probe lines.
Equipment and procedures: Clause 3 references required hardware, operating conditions and stepwise measurement procedures (see ISO 18213-1 for system descriptions and procedural overview).
Standardization & environmental effects: temperature and density variation, atmospheric/off‑gas pressures and other factors affecting comparability of measurements are recognized; data standardization algorithms are addressed in ISO 18213-2.
Uncertainty and statistical treatment: methods for estimating measurement uncertainty and statistical analysis of calibration data are provided in ISO 18213-3.

Practical applications and users

Primary users: instrumentation engineers, metrology teams, nuclear fuel facility operators, safeguards/accountancy professionals and calibration laboratories engaged in nuclear materials accountancy.
Typical uses:
- Calibrating process tanks by correlating known added volumes to measured liquid height.
- Determining in-service process liquid volumes for inventory and material balance calculations.
- Validating transfer volumes where siphon levels or indirect methods are used.
Why it matters: accurate height-to-volume relationships reduce systematic inventory errors, support regulatory compliance, and improve safeguards reporting.

Related standards

ISO 18213-1: Procedural overview (tank calibration & volume determination)
ISO 18213-2: Data standardization for tank calibration
ISO 18213-3: Statistical methods & uncertainty estimation
ISO 18213-4: Liquid height determination for slow bubbling rate (complementary method)
ISO 18213-6: In-tank determination of liquid density

ISO 18213-5:2008 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Похожие стандарты

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

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