Thermal regimes of high burn-up nuclear fuel rod

TL;DR

This paper investigates the temperature distribution in high burn-up nuclear fuel rods using numerical and analytical methods, showing that they reach a stationary thermal regime quickly and providing exact solutions for this state.

Contribution

It introduces exact solutions for stationary temperature distribution in high burn-up nuclear fuel rods and analyzes their thermal regimes.

Findings

Stationary thermal regime is reached in less than one minute.

Exact solutions for temperature distribution are derived.

High burn-up fuel rods can be modeled as stationary tasks.

Abstract

The temperature distribution in the nuclear fuel rods for high burn-up is studied. We use the numerical and analytical approaches. It is shown that the time taken to have the stationary thermal regime of nuclear fuel rod is less than one minute. We can make the inference that the behavior of the nuclear fuel rod can be considered as a stationary task. Exact solutions of the temperature distribution in the fuel rods in the stationary case are found. Thermal regimes of high burn-up the nuclear fuel rods are analyzed.