Grohnde nuclear power plant (KWG) in Lower Saxony is operated by PreussenElektra GmbH. Commercial operation began in 1985.


General information

Federal stateLower Saxony
Type (construction line)Pressurised water reactor (pre-Convoy)
Current operatorPreussenElektra GmbH
OwnerPreussenElektra GmbH, Stadtwerke Bielefeld

Operational data

Application date3 December 1973
Start of construction9 June 1976
First criticality1 September 1984
First grid synchronisation5 September 1984
Start of commercial operation1 February 1985
Expiry of authorisation for power operation in accordance with the German Atomic Energy Act (AtG)31 December 2021

Technische Daten

Thermal reactor power3,900 MW
Gross electric capacity1,430 MW
Net electric capacity1,360 MW
Number of reactor coolant pumps4
Number and mass of fuel elements in the reactor core193, mass per fuel element 850 kg
Number of fuel rods per fuel element236
Composition of the nuclear fuel1.9 - 4 w/o U-235 (uranium oxide with 1.9 - 4 % U-235)
Type of cooling system61
KühlungsartNatural draft wet cooling tower


Emission of radioactive substances (annual data) 
Reportable events 
Current remote monitoring
AuthorityLower Saxony Ministry of Environment, Energy, Building and Climate Protection