Application of moving particle semi-implicit method on simulating melt spreading within OECD/ROSAU project

被引：0

作者：

Zhao, Lu ^{[1
]}

Punetha, Maneesh ^{[1
]}

Ma, Weimin ^{[1
]}

Bechta, Sevostian ^{[1
]}

Isaksson, Patrick ^{[2
]}

Lomperski, Stephen W. ^{[3
]}

Farmer, Mitchell T. ^{[3
]}

Licht, Jeremy R. ^{[3
]}

机构：

[1] Royal Inst Technol KTH, Stockholm, Sweden

[2] Swedish Radiat Safety Author SSM, Solna, Sweden

[3] Argonne Natl Lab, Argonne, IL USA

来源：

NUCLEAR ENGINEERING AND DESIGN | 2024年 / 427卷

关键词：

Severe accident; ROSAU project; Corium spreading; MPS method;

D O I：

10.1016/j.nucengdes.2024.113447

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：

In the context of severe accidents, considerable research efforts throughout the world are currently directed towards ex-vessel corium behavior. The NEA Reduction of Severe Accident Uncertainties (ROSAU) project aims to reduce knowledge gaps and uncertainties associated with two areas: the spreading of core melt in the containment cavity as well as ex-vessel core melt and debris coolability. One pre-test and five large underwater melt spread tests (MST) with molten prototypic material in a newly designed facility are conducted at the Argonne National Laboratory (ANL) in the United States, under the co-ordination with the US Nuclear Regulatory Commission. Part of KTH contributions is to provide numerical results with the developed Moving Particle Semi- implicit (MPS) method code, with specific focus on the temperature distribution and leading-edge progression. The MST-0 and MST-2, conducted in a dry and wet spreading channel, are simulated in the present study. The predicted temperature by MPS code indicates a noticeable decrease at the melt leading edge and a slow decrease in bulk melt in both simulations. Additionally, it is found that the MPS code underestimates the melt average thickness in both simulations due to the absence of a debris porosity model. Overall, the simulation results suggest that the MPS code predicts the melt leading-edge progression and immobilization for all the tests.

引用

页数：11