Year: 2025
Type: article
Abstract: Ruthenium isotopes produced by fission in nuclear materials could be valuable signatures for nuclear verification or non-proliferation monitoring. In this study, ruthenium (Ru), uranium (U), and plutonium (Pu) isotope ratios and concentrations were measured in six different samples taken along a single nuclear fuel rod from a pressurized water reactor (PWR). The Ru isotope ratios [Formula: see text]Ru/[Formula: see text]Ru, [Formula: see text]Ru/[Formula: see text] and [Formula: see text]Ru/[Formula: see text]Ru increase upon moving from the end of the rod towards the center, correlating with the amount of burnup of the fuel indicated by U and Pu isotope ratios. Ruthenium fission product concentrations also increase near the center of the rod, consistent with other isotopic and elemental concentration data indicative of burnup. The measured Ru ratios clearly comprise inputs from both fission and neutron capture reactions. These measurements serve as important experimental validation of previous theoretical studies suggesting that Ru isotope ratios reflect the burnup of nuclear fuel and could be used to distinguish between reactor types.
Source: Scientific Reports
Authors: Genna M. Patton, Zachary A. Torrano, Amanda Salazar, Jeffrey Miller, Matthew E. Sanborn, Susan K. Hanson
Institution: Los Alamos National Laboratory
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
Award: G2500067624
OpenAlex ID: W4407126956