A Mathematical Model of Radiation-Induced Shape Change in Fuel Subassemblies of the BN-Type Reactor Core and Its Implementation in the ANSYS Software Package

被引：0

作者：

Ryabtsov A.V. ^{[1
]}

Vilensky O.Y. ^{[1
]}

机构：

[1] AO OKBM Afrikantov, Nizhny Novgorod

来源：

Inorganic Materials: Applied Research | 2019年 / 10卷 / 06期

关键词：

analytical solution; comparison; mathematical model; numerical computation; radiation-induced creep; radiation-induced swelling; test case;

D O I：

10.1134/S2075113319060200

中图分类号：

学科分类号：

摘要：

Abstract: One of the main operability criteria for fuel subassemblies (FSAs) in sodium-cooled fast reactor cores, i.e., the criterion of tolerable shape change in the hexagonal wrapper tube, is formulated. The equations that enable one to investigate the kinetics of the stress-strain state of a three-dimensional body have been adapted to operating conditions of the FSAs. A mathematical model of radiation-induced shape change in ferritic-martensitic EP-450 grade steel is proposed. With regard to the proposed model and data on the radiation-induced shape change in other currently used and prospective BN reactor core structural materials, blocks for recording radiation-induced swelling and radiation-induced creep were developed for the ANSYS software package, which made it possible to utilize its potential in this area. The test case with the proposed models of the radiation-induced swelling and creep demonstrates that the developed blocks describe sufficiently well the radiation-induced shape change in the examined structural materials exposed to radiation. Calculation of the radiation-induced shape change in the FSA hexagonal wrapper tube has been performed at various radiation-induced swelling rates and radiation-induced creep moduli. The calculated results and the results of post-irradiation inspection of the FSA dimensions are compared. Recommendations for use of the proposed models designed to calculate and estimate the radiation-induced shape change and define the stress-strain state of the FSAs are made. © 2019, Pleiades Publishing, Ltd.

引用

页码：1504 / 1509

页数：5

共 7 条

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