Critical need for plutonium and uranium isotopic standards with lower uncertainties

Gamma Assay of Uranium and Plutonium 5 v. Analytical Methods and Automated Instruments for the Determination of Plutonium and Uranium

Progress continued on method development for the dissolution of difficult-to-dissolve materials, the automated analysis of plutonium and uranium, the preparation of plutonium materials for the Safeguard Analytical Laboratory Evaluation (SALE) Program, and the analysis of HTGR fuel and SALE uranium materials. The previously developed Teflon-container, metal-shell apparatus was applied to the dis...

Simple calculation of the critical mass for highly enriched uranium and plutonium-239

Plutonium and uranium in Japanese human tissues.

Plutonium and uranium in human tissues obtained from residents of the Tokyo area were determined by a-spectrometry and the fission track method, respectively. The distribution pattern of each element was estimated on the basis of mean concentration obtained. Plutonium is concentrated in some special organs, while uranium is distributed rather generally throughout the whole body. This difference...

A Search for Isotopic Anomalies in Uranium

The 23 aU/23 $ U ratios for nine bulk chondritic meteorites and a terrestrial basalt were measured. The total range in 235U/235U determined for both total meteorites and for acid leaches was from 137.2 to 138.3 and to within the error limits indistinguishable from normal terrestrial U. The typical errors in a single determination are +6•oo (2aM) for a 2 ng U sample from a chondrite. Taking the ...

2. Plutonium Isotopic Analysis Using Pc/fram

A. Purpose of This Chapter It has been 20 years since Chapter 8, “Plutonium Isotopic Composition by Gamma-Ray Spectroscopy” in the Passive Nondestructive Assay of Nuclear Materials (Sampson 91) book was first drafted in 1983. This book, commonly referred to as the “PANDA Manual,” is one of the principal resources for passive Nondestructive Assay (NDA) measurements throughout the worldwide nucle...