Microhardness and Young's modulus of high burn-up UO2 fuel

被引：26

作者：

Cappia, F. ^{[1
,2
]}

Pizzocri, D. ^{[1
,3
]}

Marchetti, M. ^{[1
,4
]}

Schubert, A. ^{[1
]}

Van Uffelen, P. ^{[1
]}

Luzzi, L. ^{[3
]}

Papaioannou, D. ^{[1
]}

Macian-Juan, R. ^{[2
]}

Rondinella, V. V. ^{[1
]}

机构：

[1] European Commiss, Joint Res Ctr, Inst Transuranium Elements, POB 2340, D-76125 Karlsruhe, Germany

[2] Tech Univ Munich, Fac Mech Engn, Dept Nucl Engn, D-85748 Garching, Germany

[3] Politecn Milan, Dept Energy, Nucl Engn Div, I-20156 Milan, Italy

[4] Univ Montpellier 2, Inst Elect Sud UMR CNRS 5214, F-34095 Montpellier, France

来源：

JOURNAL OF NUCLEAR MATERIALS | 2016年 / 479卷

关键词：

High burn-up UO2 fuel; Vickers microhardness; Young's modulus; TRANSURANUS; THERMAL-CONDUCTIVITY; URANIUM-DIOXIDE; ELASTIC-MODULUS; PWR-FUELS; INDENTATION; HARDNESS; BEHAVIOR; POROSITY; TRANSURANUS; EVOLUTION;

D O I：

10.1016/j.jnucmat.2016.07.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Vickers microhardness (HV0.1) and Young's modulus (E) measurements of LWR UO2 fuel at burn-up >= 60 GWd/tHM are presented. Their ratio HV0.1/E was found constant in the range 60-110 GWd/tHM. From the ratio and the microhardness values vs porosity, the Young's modulus dependence on porosity was derived and extended to the full radial profile, including the high burn-up structure (HBS). The dependence is well represented by a linear correlation. The data were compared to fuel performance codes correlations. A burn-up dependent factor was introduced in the Young's modulus expression. The modifications extend the experimental validation range of the TRANSURANUS correlation from unirradiated to irradiated UO2 and up to 20% porosity. First simulations of LWR fuel rod irradiations were performed in order to illustrate the impact on fuel performance. In the specific cases selected, the simulations suggest a limited effect of the Young's modulus decrease due to burn-up on integral fuel performance. (C) 2016 The Authors. Published by Elsevier B.V.

引用

页码：447 / 454

页数：8

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