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ISO/DIS 12800

Nuclear fuel technology — Guidelines on the measurement of the specific surface area of uranium dioxide and plutonium dioxide powders by the BET method

General information

40.20     Jan 8, 2026

ISO

ISO/TC 85/SC 5

International Standard

27.120.30  

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Scope

ISO 12800:2017 gives guidelines on the determination of the specific surface area of as-fabricated uranium dioxide powder by volumetric or gravimetric determination of the amount of nitrogen adsorbed on the powder, and can be applied to other similar materials, e.g. U3O8, UO2-PuO2 powders, and other bodies with similar surface areas, e.g. powder granules or green pellets, provided that the conditions described are fulfilled. Modifications using other adsorbing gases are included.
The method is relevant as long as the expected value is in the range between 1 m2/g and 10 m2/g.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 12800:2017

NOW

PROJECT
ISO/DIS 12800
40.20 DIS ballot initiated: 12 weeks
Jan 8, 2026

National adoptions

naSRPS EN ISO 12800:2025  
ISS

Nuclear fuel technology - Guidelines on the measurement of the specific surface area of uranium dioxide and plutonium dioxide powders by the BET method (ISO/DIS 12800:2026)

40.20   DIS ballot initiated: 12 weeks

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