Title: Alternative nuclear certified reference materials for safeguards and industry
Authors: SANCHEZ HERNANDEZ ANA MARIATOTH KALMANAREGBE YETUNDEBANIK NIDHUBAUWENS JEROENBUDA RAZVANBUJAK RENATACARLOS MARQUEZ RAMONCASTELEYN KARINDUINSLAEGER LILYHENNESSY CARMELJAKOPIC ROZLEKEHOE FRANCESVAN BELLE PIETERZULEGER EVELYN
Publisher: European Union
Publication Year: 2017
JRC N°: JRC110509
ISBN: 978-92-79-73861-6
ISSN: 1831-9424
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC110509
DOI: 10.2760/631364
Type: Articles in periodicals and books
Abstract: Large-Sized Dried (LSD) spikes are Certified Reference Materials (CRMs) used in nuclear safeguards for accurate determination of nuclear material inventories by Isotope Dilution Mass Spectrometry (IDMS). They are a metrological quality tool to meet the existing requirements for reliable accountancy and verification measurements (IAEA STR-368). LSD spikes are produced by drying down accurately weighed quantities of uranium and plutonium nuclear reference solutions into vials. The dried deposits are not stable over time. To keep the spikes integrity and to prevent unintended losses of material, the CRMs need to be protected with a matrix or coating material. This substance is a critical component for the quality and long-term stability of these CRMs. IDMS relies on the mechanical integrity of the spikes; they need to be robust during transport and storage for their guaranteed life-time. The main requirements for coating materials are good adherence to glass, mechanical stability, resistance to radiation and long term stability. The material should furthermore, not interfere with the preparation and mass spectrometric measurements. Under the project "Innovative nuclear CRMs for EURATOM safeguards and industry" (INS-CRM), the JRC Directorate G for Nuclear Safety and Security examines alternative substances for coating spikes. The main candidate is CarboxyMethyl Cellulose (CMC) which seems to meet the requirements mentioned above. The goal of the project is to find the right methodology and composition for the preparation of the coatings. Additionally, the mechanical integrity needs to be proven under simulated transport and radiation conditions, and finally the spikes shelf life will be determined. Furthermore, to understand better the interaction between the matrix and the actinides, the structure and chemical properties have to be investigated using different analytical techniques. It is also planned to test several U/Pu ratios for CRMs suitable for different sample types. This paper reports on the current status of the project.
JRC Directorate:Nuclear Safety and Security

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.