NEW EMERGENCY POWER-SYSTEM FOR GKSS RESEA RCH REACTORS

The new emergency power supply system planned for installation on the site of GKSS is to replace the existing system. In addition, extensive physical security measures are to be implemented so as to meet KTA re quirements. The licensing authority also demands a plant design protec ted against seismic effects. Although all preparations have been made to invite tenders for the new emergency power system, the date at whic h a permit will be issued is still uncertain because of the absence of the seismic criteria to be met. The new system will be a two-train de sign with two redundant emergency power bus bars. Each emergency power bus bar will supply one 220 V and one 24 V DC system with batteries a nd rectifiers. The DC systems feed the instrumentation and control uni ts of emergency power loads, Diesel units, and switching systems. The AC systems feed the safety lighting systems and supply the auxiliary v oltages for the Diesel three-phase current switching systems.