INFLUENCE OF DISTURBANCES IN THE GEOMETRY OF THE ELEMENTS 
OF A REGULARLY POROUS SYSTEM ON THE HYDRODYNAMIC CHARACTERISTICS 
OF THE CLUSTERS OF FUEL ELEMENTS OF A NUCLEAR REACTOR

E. K. D'yakov,a G. V. Konyukhov,b
and V. G. Konyukhovc

UDC 621.039.517

The results of an experimental investigation of the hydraulic 
characteristics of clusters of twisted self-spaced rods on initiation 
of possible damages of their integrity are presented. For some probable 
breakdowns of clusters in their flow region the influence of these 
disturbances on the coefficient of hydraulic resistance of a packet 
of rods and on the distribution of velocities of the working body 
in the cross section of a cluster are investigated. The data obtained 
can be used for predicting the change in the thermal state of the 
active zone of the reactor, in particular, of the reactor of power 
plants under conditions of possible failure of fuel elements.

aFederal State Unitary Enterprise at the Scientific-Research 
Institute of the Scientific-Production Association "Luch," 
24 Zheleznodorozhnaya Str., Podol'sk, Moscow Region, 142100, Russia; 
b"M. V. Keldysh Research Center" Federal State Unitary 
Enterprise, 8 Onezhskaya Str., Moscow, 125438, Russia; email: kerc@elnet.msk.ru; 
cRussian State University of Physical Culture, Moscow. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 81, No. 2, pp. 365-372, 
March-April, 2008. Original article submitted June 21, 2007.