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Lognormal-Based Sampling for Fission Product Yields Uncertainty Propagation in Pebble-Bed HTGR
المؤلفون المشاركون
Li, Fu
Wu, Yingjie
Wang, Yizhen
Cui, Menglei
Guo, Jiong
Niu, Jinlin
Liu, Baokun
المصدر
Science and Technology of Nuclear Installations
العدد
المجلد 2020، العدد 2020 (31 ديسمبر/كانون الأول 2020)، ص ص. 1-21، 21ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2020-09-25
دولة النشر
مصر
عدد الصفحات
21
الملخص EN
Uncertainty analyses of fission product yields are indispensable in evaluating reactor burnup and decay heat calculation credibility.
Compared with neutron cross section, there are fewer uncertainty analyses conducted and it has been a controversial topic by lack of properly estimated covariance matrix as well as adequate sampling method.
Specifically, the conventional normal-based sampling method in sampling large uncertainty independent fission yields could inevitably generate nonphysical negative samples.
Cutting off these samples would introduce bias into uncertainty results.
Here, we evaluate thermal neutron-induced U-235 independent fission yields covariance matrix by the Bayesian updating method, and then we use lognormal-based sampling method to overcome the negative fission yields samples issue.
Fission yields uncertainty contribution to effective multiplication factor and several fission products’ atomic densities at equilibrium core of pebble-bed HTGR are quantified and investigated.
The results show that the lognormal-based sampling method could prevent generating negative yields samples and maintain the skewness of fission yields distribution.
Compared with the zero cut-off normal-based sampling method, the lognormal-based sampling method evaluates the uncertainty of effective multiplication factor and atomic densities are larger.
This implies that zero cut-off effect in the normal-based sampling method would underestimate the fission yields uncertainty contribution.
Therefore, adopting the lognormal-based sampling method is crucial for providing reliable uncertainty analysis results in fission product yields uncertainty analysis.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Wang, Yizhen& Cui, Menglei& Guo, Jiong& Niu, Jinlin& Wu, Yingjie& Liu, Baokun…[et al.]. 2020. Lognormal-Based Sampling for Fission Product Yields Uncertainty Propagation in Pebble-Bed HTGR. Science and Technology of Nuclear Installations،Vol. 2020, no. 2020, pp.1-21.
https://search.emarefa.net/detail/BIM-1209476
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Wang, Yizhen…[et al.]. Lognormal-Based Sampling for Fission Product Yields Uncertainty Propagation in Pebble-Bed HTGR. Science and Technology of Nuclear Installations No. 2020 (2020), pp.1-21.
https://search.emarefa.net/detail/BIM-1209476
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Wang, Yizhen& Cui, Menglei& Guo, Jiong& Niu, Jinlin& Wu, Yingjie& Liu, Baokun…[et al.]. Lognormal-Based Sampling for Fission Product Yields Uncertainty Propagation in Pebble-Bed HTGR. Science and Technology of Nuclear Installations. 2020. Vol. 2020, no. 2020, pp.1-21.
https://search.emarefa.net/detail/BIM-1209476
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1209476
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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