Unterweser Nuclear Power Plant

F1

Active reactors ( gross ):

Decommissioned Reactors ( gross ):

The decommissioned nuclear power plant Weser ( MSEs - also known as nuclear power plant and nuclear power plant Kleinensiel Esenshamm ) is a nuclear power plant near Roden churches and Kleinensiel, community Urban land in the district of Weser Marsch, Lower Saxony. On September 29, 1978 was the first time with a rated capacity of 1,410 MW to the grid. On March 18, 2011 at 3:33 clock it was first made as a consequence of the Fukushima nuclear disaster off-line temporarily (see nuclear moratorium ), and finally finally shut down a good two months later in the course of the energy turnaround.

History

The pressurized water reactor was built from 1972 to 1978 Siemens / KWU and went on September 29, 1978 to the network. The reactor was first critically on 16 September 1978. When starting up the reactor was the most powerful in the world. Operator of MSEs was then NWK, later Preussen Elektra.

In nuclear reactor nuclear power plant located 193 fuel. The CCC has an electrical output of 1410 MW ( net capacity 1345 MW 65 MW captive use).

It is operated by E.ON Kernkraft GmbH. The final shutdown of the CCC was established in the nuclear consensus of the red- green government under Gerhard Schröder on the feeding of the 311 billionth kilowatt hour. This corresponds approximately to a definitive closure in 2011, according to E.ON in 2012. According to the adopted in autumn 2010 term extension of the CDU government under Angela Merkel, the nuclear power plant should be running by 2020.

As the debate about the nuclear disaster at Fukushima nuclear power plant lower Weser was after the decision of the Federal Government in March 2011 to conduct a three-month nuclear moratorium for older power plants, taken on Friday, March 18, 2011 at 3:33 clock after shutdown from the mains. The operator E.ON Kernkraft GmbH had previously been instructed by the Lower Saxony state government to do so.

End of May 2011 it was decided by the environment ministers of state and federal levels to decommission the nuclear power plant Weser permanently.

The operator company E.ON announced on 9 June 2011 that the nuclear power plant will also go without the express available by the Federal Government not to service.

In January 2013, the operating company Eon said that for economic reasons the visitor center at the beginning of the year 2013 closes.

Security

Almut Gilcher ( E.ON ) indicates that the dome of the power plant of 80 cm thick steel concrete. The dome is designed for the crash of a Starfighters. This was the reference scenario for the strength of the concrete dome in the 1970s. In a nuclear power plant Brokdorf (project start 1975) they built a two-meter- thick shell.

" The concrete shell is according to a roadworthy certificate withstand a 1990 crash of a ten -ton aircraft. The impact of a heavier body according to a study by the Society for Plant and Reactor Safety is to be expected with a large-scale destruction of the reactor building. A core melt accident with open containment would result. "

Interim storage

An interim storage has been taken after almost three years of Construction Time on 18 June 2007 at the nuclear power plant Weser as nationwide last site interim storage facilities in operation. The interim storage facility is designed for a maximum of 80 container storage. The approval was limited to 40 years, starting with the first emplacement.

Incidents and technical problems

During a turbine tests during operation, in 1998 a turbine shutdown, which put a stop to the flow of steam to the turbine. Since the bypass station was not available, the non-radioactive secondary steam over pressure relief valves in the area had to be called off. It was found that one of the four valves had not been opened. Reason was that the associated control line erroneously shut off in advance by a manual valve or had not been opened. Due to human error the incident was classified as INES 2.

On 22 July 2007 it became apparent that a fitting in one of the four strands of the emergency and residual heat removal system was not set correctly. The cause was a faulty adjustment of the electronic position indicator on the valve during the revision in 2006. This was not noticed until the review in 2007. In the event of an accident of the train would be unable to provide the required cooling capacity.

Radioactivity

Operationally manage nuclear power plants on air and water, small amounts of radioactive substances from ( emission). The Atomic Energy Act requires the supervisory authorities, inter alia, to monitor the operation as regards the approved limits. A corresponding overview for the MSEs can be found on the sides of the Lower Saxony Ministry of Environment and Climate.

The measured for the year 2004, delivered with the air radioactivity is for all the radionuclides 3.8 TBq / a and with the water 14 TBq / a (the amount of discharged radioactive substance is thereby indicated by its activity ).

The resulting radiation exposure calculated by the derivative of radioactive elements to the air was in the worst case for an adult human 0.2 mSv, 0.3 mSv for young children ( as well as the thyroid dose). By the wastewater both adults and young children in 2004 were loaded with more than an equivalent dose of 0.1 mSv. By comparison, the average natural radiation exposure in the Federal Territory in 2004 was about 2100 mSv.

Protests

On 22 June 2009, the NPP Unterweser against 03:00 clock of about 50 Greenpeace activists occupied. The protesters painted on the great dome of the power plant a stylized atom symbol with a skull. This action Greenpeace wanted to draw attention to their view, critical security situation of nuclear power plants. According to information, the operator E.ON has noticed the penetration of the activists on the site; because you have identified the intruders clearly as environmental activists, E.ON had waived an evacuation of the dome and only prevented their advance in safety-relevant areas.

On Easter Monday, 2011 (April 25 ) demonstrated approximately 8,000 people at the power plant against nuclear power and for a non- reclosing of the NPP Lower Weser, which is shut down because of the nuclear moratorium for three months.

May 21, 2011 Campact started before the NPP Unterweser thousands of balloons from a 25 -meter-wide radioactivity characters. The balloons symbolize a radioactive cloud. The distribution of the balloons to demonstrate how radioactivity would spread inexorably with a GAU. At each of the balloon sticks a card; she asks the finder of the balloon to note the location in an internet card.

Data of the reactor block

The nuclear power plant Weser consists of a power plant unit: