Technology and Operation - Kernkraftwerk Gösgen

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Upgrading, retrofitting, modernisation 56 Renovating the internal fittings of the cooling tower. � Licence granted for the construction and operation of the new spent fuel storage building in accordance with the nuclear energy legislation � Modernisation of the security computer system 2005 � Controlled pressure relief system retrofitted to the reactor coolant system � Structural modification of the turbine area to improve plant efficiency � Replacement of the reheater bundle � Zinc added to the coolant for the first time 2006 � Replacement of the generator excitation equipment � Review of the probabilistic safety analysis � Integrated emergency management system implemented: revised operation and emergency handbook introduced 2007 Building work on the spent fuel pool storage building. � Analogue turbine control system partially replaced by a digital one � Replacement of a 220 kV external grid transformer � Extension to the reactor auxiliary building and the new wing of the administration building brought into service � Nuclear waste accumulated over 28 years of reactor operation is conditioned 2008 � New spent fuel pool storage building brought into service � Seal systems on all reactor coolant pumps replaced � The three 380 kV generator transformer poles and the spare pole replaced � Two low-pressure preheaters replaced � Regular ten-year safety assessment completed � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �
Characteristics HP = High-pressure turbine LP = Low-pressure turbine G = Generator DG = Diesel generator HP LP G ~ 1 Feedwater pumps 2 Auxiliary/start-up feedwater pumps 3 Emergency feedwater pumps 4 Special emergency feedwater pumps 5 Reactor coolant pumps 6 Low-pressure injection pumps 7 High-pressure injection pumps 8 Accumulators Characteristics � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6kV 380 V 7 (4-times) 380 kV G ~ 8 (3-times) 6 (6-times) 5 (3-times) DG DG DG DG DG DG 220 kV 1 (3-times) 2 (2-times) 3 (4-times) 4 (2-times) 57
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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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Page 11 and 12: The first self-sustained chain reac
Page 13 and 14: access for heavy goods vehicles. A
Page 15 and 16: 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: terim Storage Facility for Radioact
Page 63 and 64: Internet addresses � Swiss Federa
Page 65 and 66: Key technical data Power Gross elec
Page 67 and 68: 53 56 55 50 51 Component drain syst
Page 69 and 70: Speed 3000 rev/min Turbine gross ef
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