Prediction of peak cladding temperature in a three-loop pressurised water reactor with accident- tolerant fuel during loss-of-coolant accident

Q4 Energy

International Journal of Nuclear Energy Science and Technology Pub Date : 2018-08-27 DOI:10.1504/IJNEST.2018.10015409

A. Agung

引用次数: 0

Abstract

Safety analysis of a PWR fuelled with ATF (Accident-Tolerant Fuel) has been performed at LB-LOCA condition. The ATF being used is uranium silicide (U3Si2) and FCMF (Fully Ceramic Microencapsulated Fuel) with silicon carbide (SiC) and FeCrAl alloy as a cladding material. The objective of this research is to obtain dynamic characteristics of ATF-fuelled PWR at LB-LOCA condition. RELAP5-3D system code was used to model the reactor and simulate the transient. A safe shutdown of the reactor was assumed after a depressurisation following a double-ended guillotine breach in the main pipe. The results of simulations show that during LB-LOCA with partially functioning ECCS, the transient PCTs were far below the maximum allowable limit. The use of ATF could decrease the maximum transient PCT. It is shown that U3Si2 fuel with FeCrAl cladding has the minimum PCT transient and the shortest quench time to steady state condition after transient initiation.

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事故容限燃料三回路压水堆失水事故包壳峰值温度的预测

在LB-LOCA工况下，对燃用ATF（事故容许燃料）的压水堆进行了安全分析。使用的ATF是硅化铀（U3Si2）和FCMF（全陶瓷微胶囊燃料），其中碳化硅（SiC）和FeCrAl合金作为包层材料。本研究的目的是获得ATF燃料压水堆在LB-LOCA条件下的动态特性。使用RELAP5-3D系统代码对反应堆进行建模和瞬态模拟。在主管出现双端剪切机破裂后进行降压后，假设反应堆安全停堆。仿真结果表明，在具有部分功能ECCS的LB-LOCA期间，瞬态PCT远低于最大允许极限。ATF的使用可以降低最大瞬态PCT。研究表明，具有FeCrAl包壳的U3Si2燃料在瞬态启动后具有最小的PCT瞬态和最短的淬火至稳态条件的时间。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Nuclear Energy Science and Technology Energy-Nuclear Energy and Engineering

CiteScore

0.80

自引率

0.00%

发文量

期刊介绍： Today, nuclear reactors generate nearly one quarter of the electricity in nations representing two thirds of humanity, and other nuclear applications are integral to many aspects of the world economy. Nuclear fission remains an important option for meeting energy requirements and maintaining a balanced worldwide energy policy; with major countries expanding nuclear energy"s role and new countries poised to introduce it, the key issue is not whether the use of nuclear technology will grow worldwide, even if public opinion concerning safety, the economics of nuclear power, and waste disposal issues adversely affect the general acceptance of nuclear power, but whether it will grow fast enough to make a decisive contribution to the global imperative of sustainable development.