Assessment of the MARS Code Using the Two-Phase Natural Circulation Experiments at a Core Catcher Test Facility
A core catcher has been developed to maintain the integrity of nuclear reactor containment from molten corium during a severe accident. It uses a two-phase natural circulation for cooling molten corium. Flow in a typical core catcher is unique because (i) it has an inclined cooling channel with down...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Hindawi Limited
2017-01-01
|
Series: | Science and Technology of Nuclear Installations |
Online Access: | http://dx.doi.org/10.1155/2017/5731420 |
id |
doaj-4ffcdcc818a9438e8e96e8fe6072097c |
---|---|
record_format |
Article |
spelling |
doaj-4ffcdcc818a9438e8e96e8fe6072097c2020-11-24T22:50:22ZengHindawi LimitedScience and Technology of Nuclear Installations1687-60751687-60832017-01-01201710.1155/2017/57314205731420Assessment of the MARS Code Using the Two-Phase Natural Circulation Experiments at a Core Catcher Test FacilityDong Hun Lee0Su Ryong Choi1Kwang Soon Ha2Han Young Yoon3Jae Jun Jeong4School of Mechanical Engineering, Pusan National University, No. 2, Busandaehak-ro, 63 Beon-gil, Geumjeong-gu, Busan 46241, Republic of KoreaSchool of Mechanical Engineering, Pusan National University, No. 2, Busandaehak-ro, 63 Beon-gil, Geumjeong-gu, Busan 46241, Republic of KoreaKorea Atomic Energy Research Institute (KAERI), No. 111, Daedeok-daero, 989 Beon-gil, Yuseong-gu, Daejeon 34057, Republic of KoreaKorea Atomic Energy Research Institute (KAERI), No. 111, Daedeok-daero, 989 Beon-gil, Yuseong-gu, Daejeon 34057, Republic of KoreaSchool of Mechanical Engineering, Pusan National University, No. 2, Busandaehak-ro, 63 Beon-gil, Geumjeong-gu, Busan 46241, Republic of KoreaA core catcher has been developed to maintain the integrity of nuclear reactor containment from molten corium during a severe accident. It uses a two-phase natural circulation for cooling molten corium. Flow in a typical core catcher is unique because (i) it has an inclined cooling channel with downwards-facing heating surface, of which flow processes are not fully exploited, (ii) it is usually exposed to a low-pressure condition, where phase change causes dramatic changes in the flow, and (iii) the effects of a multidimensional flow are very large in the upper part of the core catcher. These features make computational analysis more difficult. In this study, the MARS code is assessed using the two-phase natural circulation experiments that had been conducted at the CE-PECS facility to verify the cooling performance of a core catcher. The code is a system-scale thermal-hydraulic (TH) code and has a multidimensional TH component. The facility was modeled by using both one- and three-dimensional components. Six experiments at the facility were selected to investigate the parametric effects of heat flux, pressure, and form loss. The results show that MARS can predict the two-phase flow at the facility reasonably well. However, some limitations are obviously revealed.http://dx.doi.org/10.1155/2017/5731420 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Dong Hun Lee Su Ryong Choi Kwang Soon Ha Han Young Yoon Jae Jun Jeong |
spellingShingle |
Dong Hun Lee Su Ryong Choi Kwang Soon Ha Han Young Yoon Jae Jun Jeong Assessment of the MARS Code Using the Two-Phase Natural Circulation Experiments at a Core Catcher Test Facility Science and Technology of Nuclear Installations |
author_facet |
Dong Hun Lee Su Ryong Choi Kwang Soon Ha Han Young Yoon Jae Jun Jeong |
author_sort |
Dong Hun Lee |
title |
Assessment of the MARS Code Using the Two-Phase Natural Circulation Experiments at a Core Catcher Test Facility |
title_short |
Assessment of the MARS Code Using the Two-Phase Natural Circulation Experiments at a Core Catcher Test Facility |
title_full |
Assessment of the MARS Code Using the Two-Phase Natural Circulation Experiments at a Core Catcher Test Facility |
title_fullStr |
Assessment of the MARS Code Using the Two-Phase Natural Circulation Experiments at a Core Catcher Test Facility |
title_full_unstemmed |
Assessment of the MARS Code Using the Two-Phase Natural Circulation Experiments at a Core Catcher Test Facility |
title_sort |
assessment of the mars code using the two-phase natural circulation experiments at a core catcher test facility |
publisher |
Hindawi Limited |
series |
Science and Technology of Nuclear Installations |
issn |
1687-6075 1687-6083 |
publishDate |
2017-01-01 |
description |
A core catcher has been developed to maintain the integrity of nuclear reactor containment from molten corium during a severe accident. It uses a two-phase natural circulation for cooling molten corium. Flow in a typical core catcher is unique because (i) it has an inclined cooling channel with downwards-facing heating surface, of which flow processes are not fully exploited, (ii) it is usually exposed to a low-pressure condition, where phase change causes dramatic changes in the flow, and (iii) the effects of a multidimensional flow are very large in the upper part of the core catcher. These features make computational analysis more difficult. In this study, the MARS code is assessed using the two-phase natural circulation experiments that had been conducted at the CE-PECS facility to verify the cooling performance of a core catcher. The code is a system-scale thermal-hydraulic (TH) code and has a multidimensional TH component. The facility was modeled by using both one- and three-dimensional components. Six experiments at the facility were selected to investigate the parametric effects of heat flux, pressure, and form loss. The results show that MARS can predict the two-phase flow at the facility reasonably well. However, some limitations are obviously revealed. |
url |
http://dx.doi.org/10.1155/2017/5731420 |
work_keys_str_mv |
AT donghunlee assessmentofthemarscodeusingthetwophasenaturalcirculationexperimentsatacorecatchertestfacility AT suryongchoi assessmentofthemarscodeusingthetwophasenaturalcirculationexperimentsatacorecatchertestfacility AT kwangsoonha assessmentofthemarscodeusingthetwophasenaturalcirculationexperimentsatacorecatchertestfacility AT hanyoungyoon assessmentofthemarscodeusingthetwophasenaturalcirculationexperimentsatacorecatchertestfacility AT jaejunjeong assessmentofthemarscodeusingthetwophasenaturalcirculationexperimentsatacorecatchertestfacility |
_version_ |
1725672617291022336 |