Isar Nuclear Power Plant

F1

Active reactors ( gross ):

Decommissioned Reactors ( gross ):

The nuclear power plant Isar, even nuclear power station Isar / Ohu is located in Lower Bavaria, 14 kilometers downstream of Landshut, in the field of market food stream. On the premises of the power plant, there are two structurally completely different reactors ( Block 1: boiling water reactor, Unit 2: Pressurized water reactor). With a total of approximately 19,051 GWh in 2007, the plant produced about three percent of the electrical energy generated in 2007 in Germany. The grounds also include an information center, an on-site interim storage and a stand-alone plant fire brigade. Block 2 is a gross electrical output of 1485 MW, the most powerful nuclear reactor in Germany.

In the vicinity of Unit 1 nuclear power plant hydro power plant Niederaichbach is. In case of failure of the two connections to the mains (400 - kV line to feed into the grid and the 110 kV spare supply) and the generator of the two blocks, the hydropower plant will be disconnected from the mains and via a direct connection as an additional backup power of the two nuclear power plants serve.

On the grounds there also was the nuclear power plant Niederaichbach, which has now been completely deconstructed.

Unit 1 of the Nuclear Power Plant ( Isar 1 ) is 100% owned and block 2 ( Isar 2 ) 75% of E.ON AG. A 25 - % stake in Isar 2 belongs to Stadtwerke München.

Block 1

Block 1 is almost identical with three other German nuclear power plants, namely nuclear power plant Brunsbuttel (near Hamburg ), nuclear power plant Phillipsburg block 1 and nuclear power plant crumbs, and with the Austrian nuclear power plant Zwentendorf that never went into operation after a referendum.

Isar 1/Ohu was first critically on 20 November 1977. The block was synchronized on December 3, 1977 for the first time to the network and put into operation on 21 March 1979. He has a German boiling water reactor type ( BWR construction line 69 ) with a gross electrical output of 912 MW and a net electrical output of 878 MW. The reactor thermal power is 2575 MW. 2007 was approximately 7,042 GWh of energy production and the total production since commissioning about 183 519 GWh. Through heat exchange with the turbine condenser (fresh water cooling) the Isar was heated to a maximum of 2.5 degrees Celsius. Another possibility for cooling cells were cooler with forced ventilation, which were used when the outside temperature and / or the amount of water of the Isar not sufficient for cooling.

According to the German nuclear consensus of June 2000, the power plant should be decommissioned by 2011. However, adopted in October 2010 amendment to the Atomic Energy Act allowed a maturity extension at eight years; Accordingly, an operation would therefore have been legally permitted until 2019. According nuclear moratorium the federal government the power plant 19 Atomic Energy Act ( imminent danger ) was shut down on 17 March 2011 by an arrangement of the Bavarian State Ministry of the Environment pursuant to §. After the recent amendment to the Atomic Energy Act, the Federal Council agreed on July 6, 2011 ( nuclear phase / energy transition ), the power plant is expected to remain for ever from the mains.

The parliamentary group of the Greens ( Bavaria ) in 2009 published a report which provides for the safety of Isar 1 critical. The CSU Landshut and the Upper Austrian government demanded in 2010 in a resolution to the disconnection of Isar 1 The operator E.ON stated in September 2010 to have invested 800 million euros for modernization since commissioning.

After the start of the Fukushima nuclear disaster was announced, temporarily shut down Unit 1 on March 15, 2011 for security checks. On March 16, the operator indicated that the power station is not switched off, but the power was reduced to 15 % of full load. We hope to again can resume normal operation after a three-month moratorium. On March 17, the Bavarian Ministry of the Environment ordered that Isar 1 was completely shut down. On the same day by 16 clock the nuclear power plant was taken offline. After the shutdown of the plant on 17 March 2011 and the shutdown of the reactor via electrical insertion of the control rods was the criterion " to lower level in the reactor pressure vessel " triggered a reactor scram. The incident had no safety significance and was announced on March 22, 2011. End of May 2011 it was decided by the environment ministers of state and federal levels, shut down the block 1 permanently. By order of the Federal Government on 30 June 2011, the lost block 1, the authorization to operate. On 10 May 2012, the decommissioning of the power plant has been requested by the operator E.ON. The reactor is the so-called ' arrest operation '.

On March 17, 2014, the Environmental Impact Assessment process began for the decommissioning of the first block.

Block 2

Isar 2/Ohu consists convoy of a pressurized water reactor design and was on January 15, 1988 for the first time critical. The block was synchronized on 22 January 1988 first time with the network and put into operation on 9 April 1988. The plant has a gross electrical output of 1485 MW and a net electrical capacity of 1410 MW. Isar 2 is thus the most powerful German reactor. At a reactor thermal power of 3950 MW, the efficiency is thus about 35 %. Total production amounted to about 222 899 GWh since commissioning. For cooling a natural draft wet cooling tower was built with a height of 165 m. The reactor building is constructed of reinforced concrete and has a wall thickness of about one meter.

The block Isar 2 was in the years 1994, 1999-2004, 2006 and 2011 with respect to the total amount of energy produced to the nuclear power plant unit with the highest annual production worldwide. Two years after Isar 2 was the block with the world's fifth largest yearly production and since then, with the exception of 1992, always in the top five.

The term extension for the German nuclear power plants in the fall of 2010 provided for the cut-off for 2034. According to the new decisions of the governing coalition to accelerate the German nuclear phase-out by the Fukushima nuclear disaster, the operation is expected by 2022 to maintain.

Reportable events

In the two blocks so far came to the following reportable events:

More events

On 30 March 1988, just 2 km crashed in front of the power plant complex southeast of Ohu, a French Mirage fighter aircraft in a forest. The pilot was killed and the incident sparked a debate about the safety of nuclear power plants in aircraft crashes out.

Fuel interim storage ( BELLA )

An interim storage facility for spent nuclear fuel with a max. Capacity of 152 containers with a heavy metal weight of 1,500 tons has gone at the site in March 2007.

Data of the reactor units

The nuclear power plant Isar has a total of two blocks: