Pore pressure calculation of the UO(2) high burnup structure

UO(2) high burnup structure has an important impact on fuel behavior, especially in case of reactivity initiated accident (RIA). Pore relaxation enhances local fuel swelling and puts additional load to the fuel cladding, which makes fuel more susceptible to pellet-cladding mechanical interaction ind...

Full description

Saved in:
Bibliographic Details
Published in:Nuclear engineering and design 2013-07, Vol.260, p.11-15
Main Authors: Gao, Lijun, Chen, Bingde, Xiao, Zhong, Jiang, Shengyao, Yu, Jiyang
Format: Article
Language:English
Subjects:
Accidental impacts
Approximation
Failure
Fuels
Mathematical analysis
Nuclear engineering
Porosity
Swelling
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:UO(2) high burnup structure has an important impact on fuel behavior, especially in case of reactivity initiated accident (RIA). Pore relaxation enhances local fuel swelling and puts additional load to the fuel cladding, which makes fuel more susceptible to pellet-cladding mechanical interaction induced failure. Therefore, pore pressure calculation becomes vital when evaluating the fuel failure. In this paper pore pressure is calculated as a function of pellet radial local burnup based on the basic characteristics of HBS using Ronchi's correlation. The results indicate that pore pressure will approach a stable value as HBS is developing. A best approximated C value of 55 N/m is recommended for pore pressure calculation.
ISSN:0029-5493