An information portal of the Federal government and the Länder

Philippsburg nuclear power plant
Unit 1/ KKP 1


Unit 1 Philippsburg nuclear power plant (KKP 1) in Baden-Württemberg, currently in the phase of dismantling, is operated by EnBW Kernkraft GmbH. Commercial operation began in 1975. Authorisation for power operation in accordance with the German Atomic Energy Act (AtG) expired on 6 August 2011. EnBW Kernkraft GmbH had filed application for decommissioning and dismantling licence on 7 April 2013. The Ministry of the Environment, Climate Protection and the Energy Sector as the competent nuclear authority in Baden-Württemberg granted the licence according to section 7 (3) AtG on 7 April 2017.


General information

Federal stateBaden-Württemberg
Type (construction line)KWU boiling water reactor (construction line 69)
Current operatorEnBW Kernkraft GmbH
OwnerEnBW AG

Operational data

Application date20 February 1970
Start of construction1 October 1970
First criticality9 March 1979
First Grid synchronisation5 May 1979
Start of commercial operation26 March 1980
Expiry of authorisation for power operation in accordance with the German Atomic Energy Act (AtG)6 August 2011
First decommissioning and dismantling licence7 April 2017

Technical data

Thermal reactor power2,575 MW
Gross electric capacity926 MW
Net electric capacity890 MW
Number of reactor coolant pumps9 axial recirculation pumps
All fuel removed from plantyes
Number of fuel elements 592592
Type of fuel elements10 x 10 and 9 x 9 rods
FuelUranium oxide with max. 3.8 % U-235
Number of control elements145
Type of cooling systemRiver water, discharge or circulation cooling using natural draft wet cooling tower