کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8067950 | 1521110 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
COPRA experiments on natural convection heat transfer in a volumetrically heated slice pool with high Rayleigh numbers
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
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چکیده انگلیسی
Large scale COPRA experiments were performed to study the natural convection heat transfer in corium pools inside the reactor pressure vessel lower plenum during severe accidents. The test facility is designed to simulate the lower plenum of reactor vessel at 1:1 scale for the Chinese advanced PWR, which is a two-dimensional 1/4 circular slice structure with an inner radius of 2.2Â m. A non-eutectic binary mixture of 20Â mol%NaNO3-80Â mol%KNO3 compositions was selected as the simulant material. Twenty custom-designed heating rods were located in the facility to provide homogenous internal heating. Due to the full scale geometry, The Rayleigh numbers within the corium pools could reach to 1.188Â ÃÂ 1015-1.784Â ÃÂ 1016, matching those in the prototypical situation during severe accident. The pool temperature field and heat flux distribution, as well as the crust thickness distribution from tests with different pool heights and heating powers were obtained and compared in the experiments. Influences of the relocation position and upper cooling on the heat transfer characteristics were also studied in the experiments. Relations of pool temperature and heat flux distribution, as well as Nudn-Raâ² relation were developed. Comparison with previous experiments showed that the downward heat transfer Nudn prediction from COPRA experiments were in good agreement with SIMECO and LIVE salt experimental results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Annals of Nuclear Energy - Volume 87, Part 2, January 2016, Pages 81-88
Journal: Annals of Nuclear Energy - Volume 87, Part 2, January 2016, Pages 81-88
نویسندگان
Luteng Zhang, Yapei Zhang, Yukun Zhou, G.H. Su, Wenxi Tian, Suizheng Qiu,