Greifswald Nuclear Power Plant

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Greifswald Nuclear Power Plant
Lubmin Hafen.jpg
Several of the units of the Greifswald NPP
Greifswald Nuclear Power Plant is located in Germany
Greifswald Nuclear Power Plant
Location of Greifswald Nuclear Power Plant
Country Germany, previously East Germany
Location Greifswald
Coordinates 54°8′26.11″N 13°39′51.92″E / 54.1405861°N 13.6644222°E / 54.1405861; 13.6644222Coordinates: 54°8′26.11″N 13°39′51.92″E / 54.1405861°N 13.6644222°E / 54.1405861; 13.6644222
Status Decommissioned
Construction began 1967
Commission date July 12, 1974
Decommission date July 22, 1990
Operator(s) Energiewerke Nord
Nuclear power station
Reactor type VVER
Reactor supplier Atomenergoexport
Škoda
Power generation
Make and model Škoda
Electrosila
Units decommissioned 5 x 440 MW
Annual generation 10,678

Greifswald nuclear power station (German: Kernkraftwerk Greifswald, KKW Greifswald), also known as Lubmin nuclear power station, was the largest nuclear power station in East Germany before closure shortly after the German reunification. The plants were of the VVER-440/V-230 type, which was the first generation of Soviet-designed plants. The plant is in Greifswald, in the state of Mecklenburg-Vorpommern.

Closure[edit]

In late 1989, nuclear regulatory bodies of countries operating VVER plants found the need to fit many new safety systems, which were stated to have been necessary in almost all areas.[1] All East German reactors were closed soon after reunification, with restarting conditional on compliance with the stricter West Germany safety standards.

Convinced that upgrading to the new safety standards was not economically feasible, the new unified German government decided in early 1991 to decommission the four active units, close unit 5, which was under test at the time, and halt construction of the rest of the units there plus two VVER-1000s at the Stendal Nuclear Power Plant.[2]

The district heating supplied by the plant was replaced by oil imports and in 1995 by a new natural gas plant. Decommissioning of units 1 through 5 began in 1995, making Greifswald one of the first nuclear power stations in Germany to go through the process. The plant came into focus again in 1996 when it was decided to move 235 unspent fuel assemblies to the Hungarian Paks Nuclear Power Plant, which is of the same design.

At its peak, the plant employed around 10,000 full-time workers; around 1,000 are working on decommissioning and other activities at the site.

Incidents[edit]

Greifswald control room in 1990
  • December 7, 1975 - An electrician wanted to show his apprentice how to bridge electrical circuits. He decided to short-circuit the primary winding on one of the Unit 1 pumps by developing an arc following the edge of a wiring loom. The fire in the main trough destroyed the current supply and the control lines of five of the unit's six main coolant pumps. The fire was quickly brought under control by the fire-brigade and the pumps were temporarily repaired. After this near-disaster, fire protection within the power station was substantially strengthened and separate electrical lines for each pump were introduced. The incident was only made public in 1989. A few hours after the incident the IAEA was informed by Soviet authorities, which classified the accident under INES 4, later revised to INES 3.[3][4]
  • November 24, 1989 - Three out of six cooling water pumps were switched off for a test. A fourth pump broke down and control of the reactor was lost; ten fuel elements were damaged and the reactor was close to melting down. The accident was reportedly attributed to sticky relay contacts[5]

Reactor summary[edit]

Unit Type Net Power Total Power Start of
construction
Finish
construction
Commercial
operation
Shut down
Greifswald - 1 (KGR 1) WWER-440/230 408 MW 440 MW 01.03.1970 17.12.1973 12.07.1974 14.02.1990
Greifswald - 2 (KGR 2) WWER-440/230 408 MW 440 MW 01.03.1970 23.12.1974 16.04.1975 14.02.1990
Greifswald - 3 (KGR 3) WWER-440/230 408 MW 440 MW 01.04.1972 24.10.1977 01.05.1978 28.02.1990
Greifswald - 4 (KGR 4) WWER-440/230 408 MW 440 MW 01.04.1972 03.09.1979 01.11.1979 22.07.1990
Greifswald - 5 (KGR 5) WWER-440/213 408 MW 440 MW 01.12.1976 24.04.1989 01.11.1989 24.11.1989
Greifswald - 6 (KGR 6) WWER-440/213 408 MW 440 MW Finished, never operated - -
Greifswald - 7 (KGR 7) WWER-440/213 408 MW 440 MW Canceled - -
Greifswald - 8 (KGR 8) WWER-440/213 408 MW 440 MW Canceled - -

See also[edit]

Nuclear plants built in the former East Germany

References[edit]

  1. ^ INSC: Database
  2. ^ [dead link] NEI Source Book: Fourth Edition (NEISB_4.1)
  3. ^ Bulletin of the Atomic Scientists 46 (6): 27. Jul 1990. ISSN 0096-3402. 
  4. ^ NYTimes, Last Soviet Reactor in Eastern Germany Shut. December 16, 1990, Section 1, p.13.
  5. ^ nuclearfiles.org, Accidents 1980's