DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Comparison of silver, cesium, and strontium release predictions using PARFUME with results from the AGR-1 irradiation experiment

Abstract

Here, the PARFUME (PARticle FUel ModEl) code was used to predict the release of fission products silver, cesium, and strontium from tristructural isotropic coated fuel particles and compacts during the first irradiation experiment (AGR-1) of the Advanced Gas Reactor Fuel Development and Qualification program. The PARFUME model for the AGR-1 experiment used the fuel compact volume average temperature for each of the 620 days of irradiation to calculate the release of silver, cesium, and strontium from a representative particle for a select number of AGR-1 compacts. Post-irradiation examination measurements provided data on release of these fission products from fuel compacts and fuel particles, and retention of silver in the compacts outside of the silicon carbide (SiC) layer. PARFUME-predicted fractional release of silver, cesium, and strontium was determined and compared to the PIE measurements. For silver, comparisons show a trend of over-prediction at low burnup and under-prediction at high burnup. PARFUME has limitations in the modeling of the temporal and spatial distributions of the temperature and burnup across the compacts, which affects the accuracy of its predictions. Nevertheless, the comparisons on silver release lie in the same order of magnitude. Results show an overall over-prediction of the fractional release of cesiummore » by PARFUME. For particles with failed SiC layers, the over-prediction is by a factor of up to 3, corresponding to a potential over-estimation of the diffusivity in uranium oxycarbide (UCO) by a factor of up to 250. For intact particles, whose release is much lower, the over-prediction is by a factor of up to 100, which could be attributed to an over-estimated diffusivity in SiC by about 40% on average. The release of strontium from intact particles is also over-predicted by PARFUME, which also points towards an over-estimated diffusivity of strontium in either SiC or UCO, or possibly both. The measured strontium fractional release from intact particles varied considerably from compact to compact, making it difficult to assess the effective over-estimation of the diffusivities. Moreover, the release of strontium from particles with failed SiC is difficult to observe experimentally due to the release from intact particles, preventing any conclusions to be made on the accuracy or validity of the PARFUME predictions and the modeled diffusivity of strontium in UCO.« less

Authors:
 [1];  [1];  [1];  [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1357239
Alternate Identifier(s):
OSTI ID: 1252271
Report Number(s):
INL/JOU-15-35343
Journal ID: ISSN 0022-3115; PII: S0022311515301690
Grant/Contract Number:  
AC07-05ID14517
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 466; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; AGR-1.tristructural isotropic (TRISO); advanced gas reactor (AGR); PARFUME; high temperature gas reactors (HTGRs); advanced test reactor (ATR)

Citation Formats

Collin, Blaise P., Petti, David A., Demkowicz, Paul A., and Maki, John T. Comparison of silver, cesium, and strontium release predictions using PARFUME with results from the AGR-1 irradiation experiment. United States: N. p., 2015. Web. doi:10.1016/j.jnucmat.2015.08.033.
Collin, Blaise P., Petti, David A., Demkowicz, Paul A., & Maki, John T. Comparison of silver, cesium, and strontium release predictions using PARFUME with results from the AGR-1 irradiation experiment. United States. https://doi.org/10.1016/j.jnucmat.2015.08.033
Collin, Blaise P., Petti, David A., Demkowicz, Paul A., and Maki, John T. Sat . "Comparison of silver, cesium, and strontium release predictions using PARFUME with results from the AGR-1 irradiation experiment". United States. https://doi.org/10.1016/j.jnucmat.2015.08.033. https://www.osti.gov/servlets/purl/1357239.
@article{osti_1357239,
title = {Comparison of silver, cesium, and strontium release predictions using PARFUME with results from the AGR-1 irradiation experiment},
author = {Collin, Blaise P. and Petti, David A. and Demkowicz, Paul A. and Maki, John T.},
abstractNote = {Here, the PARFUME (PARticle FUel ModEl) code was used to predict the release of fission products silver, cesium, and strontium from tristructural isotropic coated fuel particles and compacts during the first irradiation experiment (AGR-1) of the Advanced Gas Reactor Fuel Development and Qualification program. The PARFUME model for the AGR-1 experiment used the fuel compact volume average temperature for each of the 620 days of irradiation to calculate the release of silver, cesium, and strontium from a representative particle for a select number of AGR-1 compacts. Post-irradiation examination measurements provided data on release of these fission products from fuel compacts and fuel particles, and retention of silver in the compacts outside of the silicon carbide (SiC) layer. PARFUME-predicted fractional release of silver, cesium, and strontium was determined and compared to the PIE measurements. For silver, comparisons show a trend of over-prediction at low burnup and under-prediction at high burnup. PARFUME has limitations in the modeling of the temporal and spatial distributions of the temperature and burnup across the compacts, which affects the accuracy of its predictions. Nevertheless, the comparisons on silver release lie in the same order of magnitude. Results show an overall over-prediction of the fractional release of cesium by PARFUME. For particles with failed SiC layers, the over-prediction is by a factor of up to 3, corresponding to a potential over-estimation of the diffusivity in uranium oxycarbide (UCO) by a factor of up to 250. For intact particles, whose release is much lower, the over-prediction is by a factor of up to 100, which could be attributed to an over-estimated diffusivity in SiC by about 40% on average. The release of strontium from intact particles is also over-predicted by PARFUME, which also points towards an over-estimated diffusivity of strontium in either SiC or UCO, or possibly both. The measured strontium fractional release from intact particles varied considerably from compact to compact, making it difficult to assess the effective over-estimation of the diffusivities. Moreover, the release of strontium from particles with failed SiC is difficult to observe experimentally due to the release from intact particles, preventing any conclusions to be made on the accuracy or validity of the PARFUME predictions and the modeled diffusivity of strontium in UCO.},
doi = {10.1016/j.jnucmat.2015.08.033},
journal = {Journal of Nuclear Materials},
number = C,
volume = 466,
place = {United States},
year = {Sat Aug 22 00:00:00 EDT 2015},
month = {Sat Aug 22 00:00:00 EDT 2015}
}

Journal Article:

Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

Save / Share: