Technology and Operation - Kernkraftwerk Gösgen

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Drive system magnetic jack Number of coolant loops 3 Operating gauge pressure 154 bar Coolant inlet temperature 292°C Coolant outlet temperature 325°C Coolant flow rate 15,984 kg/s Steam generators Number 3 Height 21,200 mm Diameter 3570/4860 mm Shell material fine-grained steel Tube sheet material fine-grained steel Tube material Incoloy 800 Tube dimensions Ø 22 x 1.2 mm Design pressure/temperature 175/87.3 bar/350°C Total weight 380 t Reactor coolant pumps Number/type 3 single-stage mixed-flow centrifugal pumps Discharge head 84.4 m Design flow rate per pump 5328 kg/s Speed 1490 rev/min Motor power (design) 9200 kW Pressuriser Height 13,400 mm Diameter 2400 mm Volume 42 m 3 Operating pressure/temperature 154 bar /344°C Heating power of the heating rods 1400 kW Steam and power conversion system Live-steam flow rate 5890 t/h Live-steam conditions at steam generator outlet 64.5 bar/280.3°C Steam moisture at steam generator outlet max. 0.25 % Exhaust wetness 10 % Condenser pressure 80 mbar Cooling-water temperature 22°C Condenser circulating water flow rate 120,500 m 3 /h Feedwater heating temperature 218°C Number of feed-heating stages 5 Key technical data Turbine Fourfold-casing single-shaft condensing turbine with a double-flow high-pressure turbine and three double-flow low-pressure turbines. Steam drying and reheating between the high-pressure turbine and low-pressure turbines. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
Speed 3000 rev/min Turbine gross effective power 1035 MW Length of turbine-generator system 55 m Generator Apparent power 1190 MVA Power factor (cos �) 0.9 Terminal voltage 27 kV Frequency 50 Hz Cooling rotor winding hydrogen (6 bar), 7 bar abs. Cooling stator winding water (27 kg/s) Key technical data Generator transformer Number/type 3 single-phase units and 1 stand-by unit High voltage side 409 kV Low voltage side 27 kV Power capacity 1200 MVA Main feedwater pumps Number/type 3 double-flow double-stage radial centrifugal pumps Discharge head (backing and main pump) 812 m Design flow rate per pump 844 kg/s Motor power 8600 kW Cooling tower Number/type natural circulation wet-type Height 150 m Diameter at base 117 m Diameter at top opening 74 m Throat diameter 70 m Bottom shell thickness 750 mm Minimum shell thickness 160 mm Water flow rate 33.8 m 3 /s Warm water temperature 36°C Cold water temperature 22°C Dry bulb temperature 7.8°C Wet bulb temperature 6.2°C Air-flow rate 25,400 m 3 /s Water evaporation rate 0.4–0.7 m 3 /s Circulating water pumps Number/type 2 single-stage, mixed flow centrifugal pumps Discharge head 20.5 m Nominal flow rate per pump 16.9 m 3 /s Speed 248 rev/min Motor power 4100 kW � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
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Technology and Operation Gösgen nu
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6 31 7 29 27 26 10 Headwater channe
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This brochure provides an overview
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Contribution to Switzerland’s ele
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% 100 90 80 70 60 50 40 30 20 10 0
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The first self-sustained chain reac
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access for heavy goods vehicles. A
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pool then increases the storage cap
Page 17 and 18: is equally distributed over the thr
Page 19 and 20: Reactor coolant pump Reactor coolan
Page 21 and 22: Coolant treatment systems The volum
Page 23 and 24: leakage rate, and must also take ch
Page 25 and 26: Treatment of liquid radioactive was
Page 27 and 28: Safety barriers Nuclear fuel matrix
Page 29 and 30: The single-failure criterion applie
Page 31 and 32: Containment venting system 1 Contai
Page 33 and 34: An extensive retrofit of the pressu
Page 35 and 36: turbine from being damaged by erosi
Page 37 and 38: The feedwater pumps pump the feedwa
Page 39 and 40: ing, where it is divided over the n
Page 41 and 42: gency and residual heat removal sys
Page 43 and 44: ods to such an extent that the bala
Page 45 and 46: sound are performed in different in
Page 47 and 48: The familiar effects of ageing incl
Page 49 and 50: Aerosol collector. tower has also t
Page 51 and 52: The radiation dose received by the
Page 53 and 54: From the 1970s up to the 1990s, the
Page 55 and 56: Reprocessing plant La Hague Fuel el
Page 57 and 58: 1985 � The Federal Council approv
Page 59 and 60: terim Storage Facility for Radioact
Page 61 and 62: Characteristics HP = High-pressure
Page 63 and 64: Internet addresses � Swiss Federa
Page 65 and 66: Key technical data Power Gross elec
Page 67: 53 56 55 50 51 Component drain syst
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