Extension of FRAPCON-xt to hydride radial reorientation in dry storage

被引：8

作者：

Feria, F. ^{[1
]}

Aguado, C. ^{[1
]}

Herranz, L. E. ^{[1
]}

机构：

[1] CIEMAT, Unit Nucl Safety Res, Avda Complutense 40, Madrid 28040, Spain

来源：

ANNALS OF NUCLEAR ENERGY | 2020年 / 145卷

关键词：

Dry storage; Spent fuel modelling; Hydride radial reorientation; TERMINAL SOLID SOLUBILITY; SPENT FUEL; HYDROGEN; PERFORMANCE; STRESS; TEMPERATURE; TUBE;

D O I：

10.1016/j.anucene.2020.107559

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The dry storage of spent fuel may foster the radial reorientation of hydrides formed in the cladding. This mechanism reduces the material ductility, being a key aspect to assess the cladding integrity. The present work extends the predictive capabilities of FRAPCON-xt (CIEMATs extension to dry storage of the FRAPCON code) to the hydride radial reorientation within the cladding. The validation against experimental data shows the importance of taking into account the modelling uncertainty to explain the errors found. The new version of FRAPCON-xt has been applied to scenarios of 20 years of dry storage of spent fuel, both under realistic conditions of irradiation and dry storage temperature (50 GWd/tU and maximum temperature of 350 degrees C, respectively) and accounting for regulatory limits (62 GWd/tU and 400 degrees C). The predictions obtained (uncertainties included) allow concluding that realistic scenarios prevent the formation of radial hydrides, whereas limiting conditions would not allow ruling it out. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：7

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