The principles for the design of evaluation device for granular catalyst are discussed, and an example of acetoxidation of ethylene on some new hollow cylindric catalyst is given.

By using about twenty macroscopic and microscopic analysis techniques and testing methods,failure analysis on a number of leakage cases of heat transfer titanium tubes,which occurred in some heat exchangers of nuclear power facility with type of CANDU-6 from abroad,was systematically carded out.

By using about twenty macroscopic and microscopic analysis techniques and testing methods,failure analysis on a number of leakage cases of heat transfer titanium tubes,which occurred in some heat exchangers of nuclear power facility with type of CANDU-6 from abroad,was systematically carried out.