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  4. Prediction of Thermophysical Characteristics of Fuel Rods Based on Calculations

Prediction of Thermophysical Characteristics of Fuel Rods Based on Calculations

JEECS.
2021;
Volume 7, Number 2
: pp. 79 – 86
https://doi.org/10.23939/jeecs2021.02.079
Received: February 10, 2021
Revised: October 08, 2021
Accepted: November 04, 2021

S. Lys, I. Galyanchuk, T. Kovalenko. Prediction of thermophysical characteristics of fuel rods based on calculations. Energy Engineering and Control Systems, 2021, Vol. 7, No. 2, pp. 79 – 86. https://doi.org/10.23939/jeecs2021.02.079

Authors:
  1. Stepan Lys
  2. Igor Galyanchuk
  3. Tetiana Kovalenko
1
Lviv Polytechnic National University
2
Lviv Polytechnic National University
3
Lviv Polytechnic National University

The paper analyzes operating conditions, thermophysical characteristics were calculated as applied to WWER-1000 fuel rods in a four-year cycle for unified core. The paper gives a summary of models for calculating gas release, pressure of gases within fuel rod cladding, fuel swelling and thermal conductivity, fuel-cladding gap conductance. The thermophysical condition of fuels in a reactor core is one of the main factors that determine their serviceability. The stress-strained condition of fuel claddings under design operating conditions is closely related to fuel rod temperature, swelling, gas release from fuel pellets and the mode in which they change during the cycle and transients. Aside from this, those parameters are an independent goal of studies since their ultimate values are governed by the system of design criteria.

reactor
calculation
thermophysical properties
thermal conductivity
gas release
fuel rod
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