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Europium diffusion in IG-110 nuclear graphite

Journal Article · · Journal of Nuclear Materials
 [1];  [2];  [2];  [2]
  1. Univ. of Missouri, Columbia, MO (United States); OSTI
  2. Univ. of Missouri, Columbia, MO (United States)

Europium diffusion in graphite has been recognized to be of interest in high-temperature gas reactor safety analysis, particularly as an indicator of strontium diffusion. However, no measurements of europium diffusion coefficients have been reported in the literature. In this work, the effective diffusion coefficient of europium was measured using a time-release method. Natural europium was loaded into pre-milled unirradiated IG-110 graphite spheres using a pressurized acid digestion vessel. The time-release experiments were performed in the temperature range 1823 K – 1973 K using a SiC diffusion cell connected to an inductively-coupled plasma mass spectrometer (ICP-MS) via a He gas line. Finally, the results of this work are: DEu, IG-110 = (1.5 x 10-3m2/s) exp $$(\frac{-2.87\mathrm{x}10^{5} J/mol}{RT})$$ This effective diffusion coefficient can be used to aid in predictive modelling of europium transport in HTGRs.

Research Organization:
Univ. of Missouri, Columbia, MO (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP)
Grant/Contract Number:
NE0000118
OSTI ID:
1977375
Journal Information:
Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Journal Issue: C Vol. 561; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (21)

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ICP-MS measurement of diffusion coefficients of Cs in NBG-18 graphite journal November 2015
ICP-MS measurement of iodine diffusion in IG-110 graphite for HTGR/VHTR journal May 2016
Diffusion of cesium and iodine in compressed IG-110 graphite compacts journal August 2016
ICP-MS measurement of silver diffusion coefficient in graphite IG-110 between 1048K and 1284K journal January 2018
Measurement of effective Sr diffusion coefficients in IG-110 graphite journal November 2021
Effective diffusivity of Ag and migration of Pd in IG-110 graphite journal February 2022
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Suitability of binary oxides for molecular-beam epitaxy source materials: A comprehensive thermodynamic analysis journal August 2020
Numerical Study on Hydrogen Flow Behavior in Two Compartments with Different Connecting Pipes journal January 2017
Diffusion of Lanthanides and Actinides from Graphite at High Temperatures journal April 1961
Coated Particle fuel for high Temperature gas Cooled Reactors journal October 2007

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