Tag Archives: olkiluoto reactor Finland

Bury It and Forget It: Nuclear Waste

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The first nuclear burial site has been built in Finland, the Onkalo spent nuclear fuel repository]. Deep geological disposal of this sort is widely held to be the safest way to deal with the more than 260,000 tons of spent nuclear fuel which has accumulated in 33 countries since the first nuclear plants began churning out electricity in the mid-1950s, and the still large…. Spent fuel is a high-level nuclear waste. That means it is both physically hot (because of the energy released by radioactive decay) and metaphorically so—producing radiation of such intensity that it will kill a human being in short order. Yet unlike the most radioactive substances of all, which necessarily have short half-lives, spent fuel will remain hot for hundreds of thousands of years—as long, in fact, as Homo sapiens has walked Earth—before its radioactivity returns to roughly the same level as that of the ore it came from.

Once full, the waste repository will be backfilled with bentonite before their entrances are sealed with a reinforced-concrete cap. In 100 years’ time, Finland will fill the whole site in, remove all traces of buildings from the surface and hand responsibility over to the Finnish government. The thinking is that leaving no trace or indication of what lies below is preferable to signposting the repository for the curious to investigate.

[Unless someone decides to drill?]

Excerpt from Nuclear Waste: Oubliette, Economist, June 25, 2022

The Heavy Toll of Nuclear Waste Inheritance

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After decades of prevarication, Sweden decided on a final storage plan for its nuclear waste, becoming only the second country in the world after Finland to take such a step. Permission was granted in January 2022 to build a facility to package and store spent nuclear fuel at a coastal site near the Forsmark nuclear power plant, about an hour’s drive north of the capital. 

The decision is significant because it confirms Sweden’s position as a global leader in the storage of nuclear waste. Finland is the only other country to decide on such a plan and is building a storage facility at Olkiluoto, across the Gulf of Bothnia from Forsmark. Like the Forsmark project, the Finnish plan was based on a process developed by Swedish researchers. 

The method — referred to as KBS3 — will see the spent nuclear fuel stored in copper containers surrounded by bentonite clay and placed in 500 tunnels that will be 500 meters under the ground. The aim is to keep the radioactive waste isolated for at least 100,000 years….But there has been criticism of the KBS3 method over recent years, including by researchers who have suggested that copper may not be as resistant to corrosion as the method assumes, meaning the risk of leaks could be higher than expected. 

The approval of the Forsmark site is a big step forward in a long-running saga.  Since the 1970s, Swedish authorities — like their counterparts in nuclear-power-dependent states the world over — have been seeking a solution for the final storage of nuclear waste, scouring the country for suitable sites while also tasking researchers to develop safe methods.  But it took until 2011 for an application to be made by the company SKB — a nuclear waste manager owned by Swedish nuclear power producers — for planning permission at Forsmark. Since then, lengthy consultations have been held with interested parties, from scientists to residents in Östhammar municipality where Forsmark is located. The process became more politically divisive as the Green Party, which quit the government in November 2021, said the process was being rushed and more time was needed for research. 

According to the Environmental Minister Strandhäll:  “Today we have the knowledge and technology which means we don’t need to pass this responsibility onto our children and grandchildren,” she said. “This is a responsibility the government needs to take now.” 

Excerpts from  CHARLIE DUXBUR, Sweden approves nuclear waste storage site, http://www.politico.eu, Jan. 27, 2021

Taking Pride in Nuclear Waste: Finland and Sweden

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The site for Posiva’s repository at Eurajoki for the disposal of Finland’s high-level radioactive waste (used nuclear fuel), near the Olkiluoto nuclear power plant, was selected in 2000. The Finnish parliament approved the the repository project the following year in 2001… The government granted a construction licence for the project in November 2015 and construction work on the repository started iin 2016.  Posiva’s plan is for used nuclear fuel to be packed inside copper-steel canisters at an above-ground encapsulation plant, from where they will be transferred into the underground tunnels of the repository, located at a depth of 400-450 meters, and further into deposition holes lined with a bentonite buffer. Operation of the repository is expected to begin in 2023. The cost estimate of this large-scale construction project totals about EUR500 million (USD570 million), the company said.

Posiva  announced on June 25, 2019  the start of construction of the used fuel encapsulation plant. Janne Mokka, Posiva’s President, noted, “In Finland, full lifecycle management of nuclear fuel is a precondition for the production of climate-friendly nuclear electricity. Posiva will execute the final disposal of the spent fuel of its owners’ Olkiluoto and Loviisa nuclear power plants responsibly.”

Sweden is planning a similar used fuel encapsulation and disposal facility using the same storage method. Under its current timetable, national radioactive waste management company Svensk Kärnbränslehantering AB plans to start construction of the used fuel repository and the encapsulation plant sometime early in the 2020s and they will take about 10 years to complete.

Exceprts from Work starts on Finnish fuel encapsulation plant, World Nuclear News, June 25, 2019

See also documentary “Into Eternity” (YouTube)

Olkiluoto 3 Nuclear Plant is Ready: 2005-2020

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Finland’s Radiation and Nuclear Safety Authority (Stuk) yesterday informed the government it sees no reason why an operating licence for the first-of-a-kind nuclear plant EPR at Olkiluoto 3 should not be granted to utility Teollisuuden Voima Oyj (TVO).]…The Areva-Siemens consortium began construction of Olkiluoto 3 – the first-of-a-kind EPR – in 2005 under a turnkey contract signed with TVO in late 2003. Completion of the reactor was originally scheduled for 2009, but the project has suffered various delays and setbacks. Under the latest schedule, fuel will now be loaded into the reactor core in June 2019, with grid connection to take place in October 2019, and the start of regular electricity generation scheduled for January 2020.

In December 2018, unit 1 of the Taishan plant in China’s Guangdong province became the first EPR to enter commercial operation. Taishan 2 is scheduled to begin commercial operation in 2019. The loading of fuel into the core of the Flamanville EPR in France is expected towards the end of this year. Two EPR units are also under construction at the Hinkley Point C project in Somerset, UK.

Excerpts from Regulator concludes Finnish EPR can operate safely, Nuclear News, Feb. 2019

National Security and Nuclear Industry

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[A third nuclear reactor is to be built in Flamanville, France  by Electricité de France (EDF)]…Called Flamanville 3, is likely to become the focus of international attention because it is the model for an imminent expansion across the channel…EDF has agreed on October 21st agreed with China General Nuclear Power Corp (CGN), a state-owned entity, to build two reactors of the same design in south-west England called Hinkley Point C. EDF will own two-thirds of the project and CGN a third. The plant in Somerset is supposed to open by 2025, after construction that is forecast to cost £24.5 billion ($37.8 billion)…

The history of Flamanville 3, where work began in 2007, indicates how difficult that might be. It was planned as a five-year scheme, but this month EDF, which is mostly state-owned, formally asked officials to extend the deadline to 2020. Its original budget of €3.3 billion has more than tripled, to €10.5 billion ($11.9 billion). Getting its new European Pressurised Reactor (EPR) into service is proving harder than expected. One problem is the troubled condition of Areva, another mostly state-owned French firm, which supplies reactor components. It reported losses of nearly €5 billion in March, because of soaring costs and long delays at the only other EPR being built in Europe, Olkiluoto 3, in Finland. Work began in 2005 but it will not open before 2018 at the earliest.

The main technical problem at Flamanville 3 concerns suspicions of high levels of carbon in the steel of a crucial component, the vessel, already installed under the dome of the new reactor. Replacing it now, if inspectors conclude it is too brittle, would be costly. In June the company also said it was double-checking the working of safety valves.

Meanwhile EDF’s financial burden grows. It boasts of €73 billion in global revenues, but faces a threefold strain. Demand for electricity is stalling in France, its main market—and, as problematic, the country plans to cut nuclear’s share of electricity generation to half of the total, by 2025, from 75%. Next, though details are not finalised, EDF will absorb the nuclear unit of troubled Areva. Last, it has to upgrade, or at least maintain, France’s stock of ageing reactors. Mr Lévy told French radio on October 18th that capital expenditure for that alone would be around €50 billion.

No wonder ratings agencies judge that EDF’s financial prospects are secure only because of its state backing.  EDF’s prospects, indeed those of any nuclear company, depend on the backing of politicians who want to preserve nuclear expertise and jobs at home.

EDF’s Nuclear Ambitions: French Lessons, Economist,Oct. 24, 2015, at 63