Nuclear power in Germany

Prior to the takeover of Nazi Germany, German universities were the employers of some of the world's most renowned nuclear physicists, including Albert Einstein, Otto Hahn, Lise Meitner, Leo Szilard and others. In 1938 Hahn and his colleague Fritz Straßmann conducted an experiment designed by Lise Meitner (who had already been driven into exile due to her Jewish ancestry) which led to the discovery of nuclear fission. Soon thereafter a "race" began between the soon to be belligerents of World War II to find - military or civilian - applications of the new technology. Hampered by infighting, lack of resources, mistakes and the suspicion of Nazi authorities against "Jewish physics", the Uranverein ("uranium club") led by Werner Heisenberg never got close to building a Uranmaschine ("uranium machine" - what the Americans called a "pile") that achieved criticality, let alone building a nuclear weapon. When the Americans took over the last German attempt at a research reactor during the war at Haigerloch in southwestern Germany, it was clear to the people involved in the Alsos Mission that Germany had fallen behind the Manhattan project to a considerable degree.[9]

As in many industrialised countries, nuclear power in Germany was first developed in the late 1950s. Only a few experimental reactors went online before 1960, and an experimental nuclear power station in Kahl am Main opened in 1960. All of the German nuclear power plants that opened between 1960 and 1970 had – as in the rest of the world at that time – a power output of less than 1,000 MW and have now all closed down. The first almost fully commercial nuclear power plant started operating in 1969: Obrigheim operated until 2005, where it was shutdown by phaseout decision of the government. The first station with a power output of more than 1000 MW each were the two units of Biblis Nuclear Power Plant in 1974 and 1976.

In the early 1960s there was a proposal to build a nuclear power station in West Berlin, but the project was dropped in 1962. Another attempt to site a reactor in a major city was made in 1967, when BASF planned to build a nuclear power station on its ground at Ludwigshafen, to supply process steam. The project was withdrawn by BASF.[10]

A closed nuclear fuel cycle was planned, starting with mining operations in the Saarland and the Schwarzwald; uranium ore concentration, fuel rod filling production in Hanau; and reprocessing of the spent fuel in the never-built nuclear fuel reprocessing plant at Wackersdorf. The radioactive waste was intended to be stored in a deep geological repository, as part of the Gorleben long-term storage project. Today, there is a "ergebnisoffener" searching process over the whole country for the storage of the irradiated nuclear fuel.

In 1959, 15 municipal electric companies established the Association of Experimental Reactor GmbH (Arbeitsgemeinschaft Versuchsreaktor, AVR) to demonstrate the feasibility and viability of a gas-cooled, graphite-moderated high temperature reactor (HTGR). In the early 1960s, it started the design and construction of AVR at the Jülich Research Centre. First criticality was attained in 1966, and the AVR was in operation for more than 22 years. Despite the fuel feed and discharge system showed excellent availability, the AVR was shut down for political reasons in 1988. The AVR was designed to breed uranium-233 from thorium-232. Thorium-232 is over 100 times as abundant in the Earth's crust as uranium-235.

In 1965, before the AVR started operation, a basic design for a commercial demonstration HTGR reactor using thorium was started, the THTR-300. The HTGR, rated at 300 MW_e, synchronized with the grid in 1985. Six months later a fuel pebble became lodged in the reactor core. After repairs, it was restarted and operated from July 1986, reaching full power in September 1986. It operated until September 1988, and was shutdown in September 1989.

In the early 1970s, large public demonstrations prevented the construction of a nuclear plant at Wyhl. The Wyhl protests were an example of a local community challenging the nuclear industry through a strategy of direct action and civil disobedience. Police were accused of using unnecessarily violent means. Anti-nuclear success at Wyhl inspired nuclear opposition throughout Germany and elsewhere.[11]

The ruins of the incomplete Stendal NPP reactor building

The Rheinsberg Nuclear Power Plant was the first (mostly experimental) nuclear power plant in East Germany. It was of low power and operated from 1966 until 1990. The second to be commissioned, the Greifswald Nuclear Power Plant, was planned to house eight of the Russian 440 MW VVER-440 reactors. The first four went online between 1973 and 1979. Greifswald 5 operated for less than a month before it was closed, the other three were cancelled during different stages of their build-up. In 1990, during the German reunification, all eastern Germany nuclear power plants were closed due to flaws in safety standards. The Stendal Nuclear Power Plant in East Germany was to be the largest nuclear power station in Germany. After German reunification, and due to concerns about the Soviet design, construction was stopped and the power station was never completed. In the 1990s the three cooling towers which had been erected were demolished, and the area is an industrial estate today.

By 1992, a group of German and Swiss firms planned to proceed with construction of a HTR-500, a design that made considerable use of the THTR-300 technology. But the by then politically hostile environment in the light of the Chernobyl disaster as well as technical issues with the THTR-300 halted any effort. The technology is now pursued by the Chinese as the HTR-PM.

Anti-nuclear protest near nuclear waste disposal centre at Gorleben in northern Germany on 8 November 2008. The banner reads "Only the risk is certain. Atomic power? No thanks!"

During the chancellorship of Gerhard Schröder, the social democratic-green government had decreed Germany's final retreat from using nuclear power by 2022, but the phase-out plan was initially delayed in late 2010, when during chancellorship of center-right Angela Merkel the coalition conservative-liberal government decreed a 12-year delay of the schedule.[12] This delay provoked protests, including a human chain of 50,000 from Stuttgart to the nearby nuclear plant in Neckarwestheim.[13] Anti-nuclear demonstrations on 12 March attracted 100,000 across Germany.[14]

Eight of the seventeen operating reactors in Germany were permanently shut down following the March 2011 Fukushima nuclear disaster.

On 14 March 2011, in response to the renewed concern about the use of nuclear energy the Fukushima incident raised in the German public and in light of upcoming elections in three German states, Merkel declared a 3-month moratorium on the reactor lifespan extension passed in 2010.[15] German engineering-industry giant Siemens announced a complete withdrawal from the nuclear industry in 2011, as a response to the Fukushima nuclear disaster.[16][17] On 15 March, the German government announced that it would temporarily shut down 8 of its 17 reactors, i.e. all reactors that went online before 1981.[18] Former proponents of nuclear energy such as Angela Merkel, Guido Westerwelle, and Stefan Mappus changed their positions.[19] In the largest anti-nuclear demonstration ever held in Germany, some 250,000 people protested on 26 March 2011, under the slogan "heed Fukushima – shut off all nuclear plants".[20]

On 30 May 2011, the German government announced a plan to shut all nuclear reactors by 2022.[21] Prior to the decision, Germany's renewable energy sector already provided 17% of Germany's electricity and employed about 370,000.[22] The decision to phase-out nuclear power has been called the swiftest change of political course since unification.[23]

Political writer David Frum characterized Merkel's decision as a political move to improve her approval ratings which had sagged after the post 2008 financial crisis bailout of southern Europe by Germany.[24]

In September 2011, Siemens, which had been responsible for constructing all 17 of Germany's existing nuclear power plants, announced that it would exit the nuclear sector following the Fukushima disaster and the subsequent changes to German energy policy, and would no longer build nuclear power plants anywhere in the world.[17][25]

Merkel stated that Germany "[does not] only want to renounce nuclear energy by 2022, we also want to reduce our CO₂ emissions by 40 percent and double our share of renewable energies, from about 17 percent today to then 35 percent".[22]

Before 2011, Germany was getting just under a quarter of its electricity from nuclear power.[22] After the Fukushima disaster, the following eight German nuclear power reactors were declared permanently shut down on 6 August 2011: Biblis A and B, Brunsbuettel, Isar 1, Kruemmel, Neckarwestheim 1, Philippsburg 1 and Unterweser.[26]

Global status of nuclear deployment (2022):

  Operating reactors, building new reactors

  Operating reactors, planning new build

  No reactors, building new reactors

  No reactors, new in planning

  Operating reactors, stable

  Operating reactors, decided on phase-out

  Civil nuclear power is illegal

  No reactors

Gross generation of electricity by source in Germany from 1990 to 2020, which shows the shift from nuclear and coal to renewables and fossil gas

On 5 December 2016, the Federal Constitutional Court (Bundesverfassungsgericht) ruled that the nuclear plant operators affected by the accelerated phase-out of nuclear power following the Fukushima disaster are eligible for "adequate" compensation. The court found that the nuclear exit was essentially constitutional but that the utilities are entitled to damages for the "good faith" investments they made in 2010. The utilities can now sue the German government under civil law. E.ON, RWE, and Vattenfall are expected to seek a total of €19 billion under separate suits.[27][28][29] Six cases were registered with courts in Germany, as of 7 December 2016.[30][31]

As of March 2019, only seven nuclear plants had been left in operation and should be scheduled to be shut down and dismantled.[32] As of early 2022, three plants remain for the final year.

After Russia invaded Ukraine in 2022, German energy policy – which had up to that point relied on Russian imports (particularly natural gas) to a large degree[33] – was re-evaluated, including a temporary suspension of the controversial Nord Stream 2 pipeline.[34] The German minister of economy and climate, Robert Habeck answered in an interview that he would be "open" to extending the life of the remaining three nuclear power plants, but expressed skepticism as to the feasibility of and sense in such a move.[35] Several newspapers called for a re-opening of the debate on the nuclear phaseout, including the Frankfurter Allgemeine Zeitung.[36][37][38] The (former) operators of Germany's remaining three nuclear power plants as well as the three reactors that had been shut down in late 2021 (but not yet dismantled) commented that they are "open" to negotiations with the government as to extending the lifetime of those reactors or restarting those that were already shut down.[39][40] On 21 August 2022, German Economy Minister Robert Habeck said that Germany would not reverse the phase-out itself, but said that he was open to the idea of extending the lifespan of the Isar Nuclear Power Plant in Bavaria, subject to a stress test of Germany's electricity system.[41]

On 5 September 2022, the Federal Government announced that two of the three remaining nuclear power plants (Neckarwestheim and Isar 2) would operate beyond 31 December 2022 until April 2023 (cycle stretch out), while the Emsland Nuclear Power Plant was to be shut down as planned.[42] However, on 10 October 2022, Scholz announced that all three would remain operating until 15 April 2023.[43] Wolfgang Kubicki, deputy leader of the Free Democrats, said in an interview with the Funke Media Group that, "Germany has the safest nuclear power plants worldwide and switching them off would be 'a dramatic mistake' with painful economic and ecological consequences." Other members of the Free Democratic Party have called for the nuclear power plants to be at least maintained as a precautionary measure in case they are needed in the future for power generation.[44]

On 19 October 2016, the German cabinet (Bundeskabinett) finalized a deal with nuclear power plant operators E.ON, EnBW, RWE, and Vattenfall over long-term nuclear waste disposal. Under the agreement, the four operators are freed of responsibility for storing radioactive waste – that responsibility is instead transferred to the state. In return, the operators will pay a total of €17.4 billion into a state-administered fund to finance the interim and final storage of nuclear waste. They will also pay an additional "risk surcharge" of €6.2 billion (35.5%) to cover the eventuality that costs exceed current projections and that the interest accrued by the fund is lower than expected. The operators will be responsible for decommissioning and deconstructing their own nuclear power plants, as well as preparing their radioactive waste for final storage.

Critics, including the German Renewable Energy Federation and BUND, claim the total of €23.6 billion would prove insufficient and that future taxpayers will carry the risk.[50]

While the official policy of Germany is to dispose of spent fuel in a deep geological repository inside Germany's borders,[51] Germany is also involved in research into nuclear transmutation of high level waste (primarily Actinides, which account for most of the long-term radiotoxicity of spent nuclear fuel). An important research project underway in Belgium is MYRRHA which relies on German suppliers for the particle accelerator which is in a sense the "heart" of every Accelerator Driven System and whose reliability is the key issue to be solved before such systems can be commercialized.[52]