Determination of high burn-up nuclear fuel elastic properties with acoustic microscopy

被引：27

作者：

Laux, D. ^{[1
]}

Baron, D. ^{[2
]}

Despaux, G. ^{[1
]}

Kellerbauer, A. I. ^{[3
]}

Kinoshita, M. ^{[4
]}

机构：

[1] Univ Montpellier 2, CNRS, IES, UMR 5214, F-34095 Montpellier 05, France

[2] CEN Cadarache, EDF R&D, F-13108 St Paul Les Durance, France

[3] Commiss European Communities, Joint Res Ctr, Inst Transuranium Elements ITU, D-76344 Eggenstein Leopoldshafen, Germany

[4] Cent Res Inst Elect Power Ind, Tokyo 201, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2012年 / 420卷 / 1-3期

关键词：

LONG-WAVELENGTH PROPAGATION; ULTRASONIC VELOCITY; URANIUM-DIOXIDE; YOUNGS MODULUS; POROSITY; TEMPERATURE; MEDIA; UO2;

D O I：

10.1016/j.jnucmat.2011.09.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the measurement of elastic constants of non-irradiated UO2, SIMFUEL (simulated spent fuel: UO2 with several additives which aim to simulate the effect of burnup) and irradiated fuel by focused acoustic microscopy. To qualify the technique a parametric study was conducted by performing measurements on depleted uranium oxide (with various volume fraction of porosity, Oxygen-to-metal ratios, grain sizes) and SIMFUEL and by comparing them with previous works presented in the literature. Our approach was in line with existing literature for each parameter studied. It was shown that the main parameters influencing the elastic moduli are the amount of fission products in solution (related to burnup) and the pore density and shape, the influence of which has been evaluated. The other parameters (irradiation defects, oxygen-to-metal ratio and grain sizes) mainly increase the attenuation of the ultrasonic wave but do not change the wave velocity, which is used in the proposed method to evaluate Young's modulus. Measurements on irradiated fuel (HBRP and N118) were then performed. A global decrease of 25% of the elastic modulus between 0 and 100 GWd/tM was observed. This observation is compared to results obtained with measurements conducted at ITU by Knoop indentation techniques. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：94 / 100

页数：7

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