Abstract

This document specifies an analytical method for determining the neptunium concentration by spectrophotometry, with spectrophotometer implemented in hot cell or glove box allowing the analysis of high activity solutions, with a standard uncertainty, with coverage factor k = 1 of about 5 %, in nitric acid solutions after the dissolution of nuclear reactor irradiated fuels, at different steps of the process in a nuclear fuel reprocessing plant or in other nuclear facilities. The method is applicable to sample from the process containing a concentration of neptunium between 10 mg·l-1 and 400 mg·l-1 and uranium concentrations of up to 300 g·l-1.

Begin

2026-02-12

WI

00430155

Planned document number

DIN EN ISO 13465

Project number

06237071

Responsible national committee

NA 062-07 FBR - Board of the Technical Department Radiation protection, nuclear technology and fusion technology  

Responsible european committee

CEN/TC 430 - Nuclear energy, nuclear technologies, and radiological protection  

Responsible international committee

ISO/TC 85/SC 5/WG 1 - Analytical methodology in the nuclear fuel cycle  

draft standard

Nuclear energy - Nuclear fuel technology - Determination of neptunium in nitric acid solutions by spectrophotometry (ISO 13465:2024); English version prEN ISO 13465:2026
2026-05
Order from DIN Media