Unterweser nuclear power plant

Summary

Unterweser nuclear power plant in Lower Saxony is operated by PreussenElektra GmbH. Commercial operation began in 1979. The plant was shut down on 18 March 2011. Authorisation for power operation in accordance with the German Atomic Energy Act (AtG) expired on 6 August 2011. The first licence for decommissioning and dismantling was granted according to section 7 (3) AtG on 5 February 2018.

General information

Site	Stadland (Kleinensiel district)
Federal state	Lower Saxony
Type (construction line)	Pressurised water reactor
Current operator	PreussenElektra GmbH
Manufacturer	KWU
Owner	PreussenElektra GmbH

Operational data

Application date	7 April 1971
Start of construction	1972
First criticality	16 September 1978
First grid synchronisation	29 September 1978
Start of commercial operation	6 September 1979
Shutdown date	18 March 2011
Expiry of authorisation for power operation in accordance with the German Atomic Energy Act (AtG)	6 August 2011
First decommissioning and dismantling licence	5 February 2018
Second dismantling licence	15 July 2021

Technical data

Thermal reactor power	3,900 MW
Gross electric capacity	1,410 MW
Net electric capacity	1,345 MW
Number of reactor coolant pumps	4
Number and mass of fuel elements in the reactor core	193, mass per fuel element 840 kg
Number of fuel rods per fuel element	236
Composition of the nuclear fuel	1.9-4.4 w/o U-235 (uranium oxide with 1.9 - 4.4 % U-235)
Number of control elements	61
Type of cooling system	River water cooling