ISO 11483:2005 PDF

Scope: This International Standard describes three simple and fast procedures to prepare plutonium sources and a procedure to measure the activity ratio of Pu to (Pu + Pu) by α spectrometry. The α spectrometry method is used for the determination of isotopic abundance of Pu in combination with mass spectrometry and eliminates the possible interferences of U in the latter method. It applies to the analysis of purified solutions of plutonium in 2 mol/l to 4 mol/l nitric acid containing 50 μg to 200 μg of plutonium per millilitre, as may result from the chemical treatment and purification preceding plutonium isotopic analysis by mass spectrometry. This International Standard applies to plutonium solutions free from Am and those containing less than 10% of other non-volatile impurities relative to the plutonium content. Anion exchange chromatography in accordance with ISO 8299:1993 , Subclauses 7.2 and 7.3, or solvent extraction chromatography in ISO 15366 are suitable purification methods. The methods given in this International Standard are intended for use in conjunction or in parallel with mass spectrometry for the isotopic analysis of plutonium in spent-fuel solutions or nuclear-grade plutonium products.

ISO 11483:2005 history

2005 ISO 11483:2005 Nuclear fuel technology - Preparation of plutonium sources and determination of <(hoch)238>Pu/<(hoch)239>Pu isotope ratio by alpha spectrometry
1994 ISO 11483:1994 Preparation of plutonium sources and determination of <(hoch)238>Pu/<(hoch)239>Pu isotope ratio by alpha spectrometry