This document specifies a method for the determination of the isotopic and elemental uranium and plutonium concentrations of nuclear materials in nitric acid solutions by thermal-ionization mass spectrometry.<\/p>\n
The method applies to uranium and plutonium isotope composition and concentration measurement of irradiated Magnox and light water reactor fuels (boiling water reactor or pressurized water reactor), in final products at spent-fuel reprocessing plants, and in feed and products of MOX and uranium fuel fabrication. The method is applicable to other fuels, but the chemical separation and spike solution are, if necessary, adapted to suit each type of fuel.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions 4 Principle <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 5 Reference materials and reagents 5.1 Spikes and reference materials <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 5.2 Other chemical reagents <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 5.3 Resin, applicable for separation\/purification of Pu and U 5.3.1 General 5.3.2 \u200bPreparation of resin <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 6 Apparatus <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 7 Apparatus for mass spectrometry 8 Sample preparation 8.1 Subsampling and spiking <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 8.1.1 Pellet or powder samples 8.1.2 Concentrated nuclear fuel solution samples (such as reprocessing solution) 8.1.3 Plutonium nitrate solution samples (such as product solution from a reprocessing plant) <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 8.1.4 Dried nitrate samples 8.2 Chemical valency adjustment 8.2.1 Valence adjustment with ferrous solution 8.2.2 Valence adjustment with hydrogen peroxide <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 8.3 Sample separation\/purification 8.3.1 Ion exchange with anion-exchange resin <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 8.3.2 Purification with extraction separation resins (see 5.3.1.2) 8.4 Replicate treatments 9 Filaments preparation 9.1 Degassing of filaments 9.2 Sample loading 9.2.1 Normal sample loading 9.2.2 Graphite loading technique <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 9.2.3 Resin-bead loading on single filaments for Pu samples 9.3 Filament mounting (filament assemblies preparation) 10 Instrument calibration 10.1 Mass calibration 10.2 Gain calibration for Faraday multi-detectors 10.3 Faraday detector calibration <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 10.4 Mass discrimination calibration 11 Isotopic mass spectrometric measurements 11.1 Total evaporation measurements using a single or double filament assembly and a multi-Faraday collector system <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 11.2 Bias correction method using a double filament assembly and a multi-Faraday collector system 12 Calculation of the results 12.1 Calculation of ion current intensities <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 12.2 Calculation of mean, weighted mean and standard deviation on a set of ratios xi, (i = 1\u2026N) 12.3 Mass discrimination correction 12.4 Calculation of the atomic percent abundance Ai <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 12.5 Calculation of the isotopic mass percent Wj 12.6 Calculation of concentration <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 12.7 Isotope decay correction 13 Blanks 14 Quality control <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 15 Measurement uncertainty 15.1 Elemental assay 15.2 Isotopic analysis <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 16 Interferences <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Annex A (normative) Preparation and standardization of spike solutions <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Nuclear fuel technology. Determination of the isotopic and elemental uranium and plutonium concentrations of nuclear materials in nitric acid solutions by thermal-ionization mass spectrometry<\/b><\/p>\n |