Inspection of the TRIGA mark-2 reactor tank Vienna in July 1988

During a routine visual inspection with binoculars in spring 1988, three corrosion craters were observed on the top of the former 'thermalizing column', now being used as neutron radiography facility. The location of the corrosion craters is indicated in fig.1. As the optical resolution of the binoculars was not sufficient it was decided to ask for the support of the KFKI Budapest with its nuclear underwater telescope. The telescope and other equipment used is described and the results of the inspection are presented. It is concluded that the three major corrosion craters do not pose any safety hazard because the corrosion depth is small compared to the material thickness. However, further close monitoring of the corrosion craters is recommended. 24 figs. (qui)