Theses and Dissertations

Advisor

Gabitov, Rinat I.

Committee Member

Jimenez-Arroyo, Angel

Committee Member

Paul, Varun G.

Date of Degree

5-16-2025

Original embargo terms

Visible MSU Only 1 year

Document Type

Graduate Thesis - Campus Access Only

Major

Geoscience (Geology)

Degree Name

Master of Science (M.S.)

College

College of Arts and Sciences

Department

Department of Geosciences

Abstract

The purpose of this thesis is to provide baseline knowledge of iodine incorporation into calcium phosphate minerals, specifically apatite. Iodine-129 is a fission product in Spent Nuclear Fuel (SNF) that can administer significant amounts of radiation in small quantities. Apatite (Ca10(PO4)6 (OH, F, Cl)) has been studied for the use of radionuclide confinement. Experimental design was set up to mimic temperatures expected in geologic repositories from 40 to 250℃. Experiments are broken into 2 groups based on iodine species being examined. The first group focuses on iodate (IO3-) which is prevalent under oxidized conditions, and the second handles iodide (I-) the predominant reduced species. Iodate partition coefficients between apatite and liquid (DIAP/L) exceed 350. Iodide DIAP/L values are much lower with the highest found being ~0.5 showing that iodate is significantly confined by apatite, but iodide is only minimally confined.

Sponsorship (Optional)

Thank you for the support from the Nuclear Energy University Program (Department of Energy, DE-NE0009186, Project 23989). Los Alamos National Laboratory, an affirmative action/equal opportunity employer, is operated by Triad National Security LLC, for the NNSA of U.S. DOE (Contract No. 89233218CNA00000)

Download

Share

COinS