Authors & Affiliations

Kruglov A.B., Kruglov V.B., Kharitonov V.S., Struchalin P.G.
”National Research Nuclear University “MEPhI”, Moscow, Russia

Kruglov A.B. – Training resource worker, Cand. Sci. (Phys.-Math.), ”National Research Nuclear University “MEPhI”. Contacts: 31, Kashirskoe shosse, Moscow, Russia, 115409. Tel.: +7(909) 983-75-44, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Kruglov V.B. – Associate professor, Cand. Sci. (Tech.), ”National Research Nuclear University “MEPhI”.
Kharitonov V.S. – Deputy head of department of thermal physics, Cand. Sci. (Tech.), ”National Research Nuclear University “MEPhI”.
Struchalin P.G. – Engeneer, ”National Research Nuclear University “MEPhI”.

Abstract

The paper presents the results of creating a non-destructive method for measuring the thermal conductivity of fuel and thermal resistance between fuel and fuel cladding with dense nuclear fuel. The technique is based on a comparison of the characteristic times of the calculated and experimental thermograms of the surface of a portion of a fuel cladding formed during its heating and cooling caused by the action of a laser pulse. The technique is aimed at possible use under protective chamber conditions and is non-destructive.
With the help of the developed technique and a specially created laboratory setup, test measurements of the thermal conductivity of cylindrical samples were carried out, which showed satis-factory agreement of their results with literature data. Measurements of thermal conductivity of fuel simulators and thermal resistance between simulators and the shell were carried out in specially created models of fuel elements. The results of these measurements also demonstrated the coincidence with the calculated estimates and literature data within the limits of error, as well as the overall performance of the method.

Keywords
non-destructive measurements, pulse method, dense fuel, thermal conductivity, thermal resistance, thermal conductivity measurement technique, thermal resistance measurement technique, thermophysical properties

Article Text (PDF, in Russian)

References

UDC 621.7.029

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2018, issue 4, 4:15