An information portal of the Federal government and the Länder

Brunsbüttel nuclear power plant (KKB)


Brunsbüttel nuclear power plant in Schleswig-Holstein is operated by Kernkraftwerk Brunsbüttel GmbH & Co. oHG. Commercial operation began on 9 February 1977. Authorisation for power operation in accordance with the German Atomic Energy Act (AtG) expired on 6 August 2011.


General information

Federal stateSchleswig-Holstein
Type (construction line)Boiling water reactor (construction line 69)
Current operatorKernkraftwerk Brunsbüttel GmbH & Co. oHG
ManufacturerKraftwerk Union AG
OwnerVattenfall Europe Nuclear Energy GmbH (66,6%)
E.ON Kernkraft GmbH (33,3%)

Operational data

Application date10 November 1969
Start of construction2 April 1970
First criticality23 June 1976
First grid synchronisation13 July 1976
Start of commercial operation9 February 1977
Expiry of authorisation for power operations in accordance with the German Atomic Energy Act (AtG)6 August 2011

Technical data

Thermal reactor power2292 MW
Gross electric capacity806 MW
Net electric capacity771 MW
Number of reactor coolant pumps
8 axial recirculation pumps
Number of fuel elements532, according to type; no fuel elements in the reactor pressure vessel any more
Weight of fuel elements in reactor core
approx. 280 kg to 300 kg, according to type 
Number of fuel rods per fuel element
10x10 fuel rod assembly, according to type 
Composition of the nuclear fuelUranium dioxide with an average fuel element enrichment of 3.8 - 4.1% U-235
Number of control elements129
Type of cooling systemRiver water cooling