The Benelux-German fast reactor programme

A brief account of the development of fast reactors in Germany includes main parameters and construction schedules for KNK and SNR 300, some organisation details, major SNR sodium test facilities in the Debenelux countries, and some comments on fuel development work. The design of SNR 300 reactor and coolant systems is described and an outline is given of the construction status. Few technical difficulties were encountered in the development programme for the first part of the SNR 300 construction. Full-scale testing of major sodium components under operating conditions led to the early detection of some defects in pumps and steam generators. The major problem proved to be the safety licensing procedure. The difficulties encountered in this area and the analysis required for the hypothetical core disruptive accident (HCDA) are discussed. Consideration is given to the commercial introduction of fast breeders, the most important aspects of which is the SNR 2 demonstration station. The desirability of continued international co-operation is stressed. (U.K.)