Ignalina Handbook

5.3 Alarming and Notification

 

A block diagram of the emergency notification and communications system is represented in Figure 5.1. The emergency notification system at Ignalina NPP includes:

• notification of plant personnel;
• notification of Visaginas residents and administration authorities of the nearby regions;
• direct phone connections with the Department of Civil Defence in Vilnius and Dispatcher of the Lithuanian Power System;
• INMARSAT satellite communications system to notify Swedish authorities: Radiation Protection Institute, Swedish Nuclear Power Inspectorate and Swedish Meteorological Institute.

Personnel notification system includes:

• one-way loudspeaking communications network, consisting of 23 loudspeakers installed in reactor buildings and around the site;
• wire transmission network consisting of radio center and office radio receivers;
• conference hall cabinet where telephones of the plant administration are linked;
• 17 emergency warning sirens installed inside the power plant units and on site.

Notification of Visaginas administration authority is effected remotely via the Ignalina NPP-Visaginas cable line. The officials of the Ignalina and Zarasai regions are notified by telephone. Direct cable telephone lines between Ignalina NPP and Vilnius are provided for communications with the Department of Civil Defence and the Lithuanian Power System. A satellite communications system INMARSAT MCS.9120 is installed in VATESI office in the plant administrative building for notification of Swedish authorities. The system includes a panel for automatic transmission of emergency messages, phone and fax channels.

 



Fig. 5.1 Block diagram of Ignalina NPP notification system for personnel and population [15]