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Title: Preparation of Simulated LBL Defects for Round Robin Experiment

Abstract

A critical characteristic of the TRISO fuel design is its ability to retain fission products. During reactor operation, the TRISO layers act as barriers to release of fission products not stabilized in the kernel. Each component of the TRISO particle and compact construction plays a unique role in retaining select fission products, and layer performance is often interrelated. The IPyC, SiC, and OPyC layers are barriers to the release of fission product gases such as Kr and Xe. The SiC layer provides the primary barrier to release of metallic fission products not retained in the kernel, as transport across the SiC layer is rate limiting due to the greater permeability of the IPyC and OPyC layers to many metallic fission products. These attributes allow intact TRISO coatings to successfully retain most fission products released from the kernel, with the majority of released fission products during operation being due to defective, damaged, or failed coatings. This dominant release of fission products from compromised particles contributes to the overall source term in reactor; causing safety and maintenance concerns and limiting the lifetime of the fuel. Under these considerations, an understanding of the nature and frequency of compromised particles is an important partmore » of predicting the expected fission product release and ensuring safe and efficient operation.« less

Authors:
 [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1238020
Report Number(s):
ORNL/TM-2015/722-R3
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; leach burn leach; TRISO

Citation Formats

Gerczak, Tyler J., Baldwin, Charles A., Hunn, John D., and Montgomery, Fred C. Preparation of Simulated LBL Defects for Round Robin Experiment. United States: N. p., 2016. Web. doi:10.2172/1238020.
Gerczak, Tyler J., Baldwin, Charles A., Hunn, John D., & Montgomery, Fred C. Preparation of Simulated LBL Defects for Round Robin Experiment. United States. https://doi.org/10.2172/1238020
Gerczak, Tyler J., Baldwin, Charles A., Hunn, John D., and Montgomery, Fred C. 2016. "Preparation of Simulated LBL Defects for Round Robin Experiment". United States. https://doi.org/10.2172/1238020. https://www.osti.gov/servlets/purl/1238020.
@article{osti_1238020,
title = {Preparation of Simulated LBL Defects for Round Robin Experiment},
author = {Gerczak, Tyler J. and Baldwin, Charles A. and Hunn, John D. and Montgomery, Fred C.},
abstractNote = {A critical characteristic of the TRISO fuel design is its ability to retain fission products. During reactor operation, the TRISO layers act as barriers to release of fission products not stabilized in the kernel. Each component of the TRISO particle and compact construction plays a unique role in retaining select fission products, and layer performance is often interrelated. The IPyC, SiC, and OPyC layers are barriers to the release of fission product gases such as Kr and Xe. The SiC layer provides the primary barrier to release of metallic fission products not retained in the kernel, as transport across the SiC layer is rate limiting due to the greater permeability of the IPyC and OPyC layers to many metallic fission products. These attributes allow intact TRISO coatings to successfully retain most fission products released from the kernel, with the majority of released fission products during operation being due to defective, damaged, or failed coatings. This dominant release of fission products from compromised particles contributes to the overall source term in reactor; causing safety and maintenance concerns and limiting the lifetime of the fuel. Under these considerations, an understanding of the nature and frequency of compromised particles is an important part of predicting the expected fission product release and ensuring safe and efficient operation.},
doi = {10.2172/1238020},
url = {https://www.osti.gov/biblio/1238020}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2016},
month = {Fri Jan 01 00:00:00 EST 2016}
}