Ceramics-Silikáty 28, (3) 195 - 202 (1984)

The technical glasses SIMAX, SIAL, PN, UNIHOST, KS-80, KS-90 were irradiated in the VVR-S reactor and their electrical conductance was measured. The decrease of conductance was found after irradiation by thermal neutron fluence 2.0 x 10²³ n.m^-2 having characteristical values for different sorts of glasses, In the reactor rig was studied the heat gene­ration in glasses with boron (SIMAX, SUPREMAX) and without boron (UNIHOST). Boronless glass has shown the temperature increment compa­rable with temperature measurement error. Both borosilicate glasses pro­duced elevation 39 K, resp. 33 K, at the rig operational temperature 350 to 390 °C.