کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
296000 511699 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The prediction problems of VVER fuel element cladding failure theory
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
The prediction problems of VVER fuel element cladding failure theory
چکیده انگلیسی


• Fuel cladding failure forecasting is based on the fuel load history and the damage distribution.
• The limit damage parameter is exceeded, though limit stresses are not reached.
• The damage parameter plays a significant role in predicting the cladding failure.
• The proposed failure probability criterion can be used to control the cladding tightness.

A method for forecasting of VVER fuel element (FE) cladding failure due to accumulation of deformation damage parameter, taking into account the fuel assembly (FA) loading history and the damage parameter distribution among FEs included in the FA, has been developed. Using the concept of conservative FE groups, it is shown that the safety limit for damage parameter is exceeded for some FA rearrangement, though the limits for circumferential and equivalent stresses are not reached. This new result contradicts the wide-spread idea that the damage parameter value plays a minor role when estimating the limiting state of cladding. The necessary condition of rearrangement algorithm admissibility and the criterion for minimization of the probability of cladding failure due to damage parameter accumulation have been derived, for using in automated systems controlling the cladding tightness.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Design - Volume 302, Part A, June 2016, Pages 46–55
نویسندگان
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