کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7964945 | 1514179 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mechanistic model for the fragmentation of the high-burnup structure during LOCA
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Mechanistic model for the fragmentation of the high-burnup structure during LOCA Mechanistic model for the fragmentation of the high-burnup structure during LOCA](/preview/png/7964945.png)
چکیده انگلیسی
A model was developed to account for the fragmentation of the high-burnup structure in fuel pellets during a loss-of-coolant accident. The basic assumptions of the model are that the pores have reached the dislocation punching overpressure during base irradiation and that the increasing overpressure due to rising temperature causes fuel fracturing. The distribution of the pore sizes is taken into account, not only the mean value. The model predicts the existence of a minimum pore size in normal operation, the decrease of threshold burnup for fuel fragmentation when the last-cycle power rating of the rod is high and a reduced fragmentation when a strong PCMI restraint is present during the transient. It can reproduce experimental results in terms of temperature range for fragmentation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 466, November 2015, Pages 409-416
Journal: Journal of Nuclear Materials - Volume 466, November 2015, Pages 409-416
نویسندگان
Katalin Kulacsy,