Nuclear Reactors

Abstract

The testing problems encountered in nuclear reactors mainly concern welded joints on the pressure vessel and its connecting nozzles, furthermore, bonding defects and crack tests of the cladding of the inside: These problems have already been discussed basically in previous chapters and are encountered partially also in conventional power-station and boiler construction. This complex of testing problems shall now be discussed specifically because the disastrous consequences of a defect require particularly careful and extensive testing, and, furthermore, because in-service tests are required which make high demands on the documentation. Finally, the relevant testing devices comprise the most elaborate equipment used in ultrasonic testing, due to the size of the object, the required remote control, and the automated procedure imposed by the exposure to radiation and the short testing time available for a routine test.