ATLAS Thermosiphon Electrical Distribution and Run Modes O.Crespo-Lopez EDMS: 1159012

Two Operation Modes Normal Mode: (180kW @ -70°C) all the system is operational @ full power Warm mode: (50kW @ -20°) Could be used if normal power trip or during electrical maintenance Could be used if we loose the water system

Power sources For the thermosiphon cooling system we use UPS power: All the PLC cabinets Brine pumps Liquid heaters Dummy load heater for minimal flow Diesel power (warm mode) High temp stage of the chiller with limited power Normal power (normal mode) All the rest of the system

Electrical distribution USA15 level 2 Surface SX1 & outside

Installed power 100 kW 231 kW 237 kW 10 kW 40 kW 30 kW 15.5 kW Chiller Circuit Low Temperature Stage High Temperature Stage 100 kW Primary Water Water Circuit TS Condenser Brine Circuit 231 kW 237 kW 10 kW 40 kW 30 kW 15.5 kW 10 kW for PLC’s 72 kW 5 kW for PLC’s 24 kW power Normal Diesel in kW UPS in kW Surface 530 kW 100 kW 40 kW underground 115.5 kW - 100 kW By-pass Full power dummy load Normal power UPS power Diesel power

Normal mode 231 kW 237 kW 10 kW 40 kW 30 kW 15.5 kW 10 kW for PLC’s Chiller Circuit Low Temperature Stage High Temperature Stage Primary Water Water Circuit TS Condenser Brine Circuit 231 kW 237 kW 10 kW 40 kW 30 kW 15.5 kW 10 kW for PLC’s Used only during start-up 72 kW 5 kW for PLC’s 24 kW The chiller can provide 180kW @ -70°C By-pass Full power dummy load Normal power UPS power Diesel power

Warm mode 100 kW 100 kW 10 kW 40 kW 30 kW 10 kW for PLC’s 56 kW Chiller Circuit Low Temperature Stage High Temperature Stage 100 kW Primary Water Water Circuit TS Condenser Brine Circuit 100 kW 10 kW 40 kW 30 kW 10 kW for PLC’s 56 kW 5 kW for PLC’s The chiller can provide 50kW @ -20°C with water or air cool condenser 24 kW By-pass Full power dummy load Normal power UPS power Diesel power