Pourquoi démanteler les centrales nucléaires?

[Christophe]

Et je n’ai rien dit d’autre...

Merci oui je sais lire...

On parle de chooz A si tu veux ?

[moinsdewatt]

Chez nos amis Suisse, des nouvelles de Mühleberg suite à l'arrêt du réacteur il y a 9 mois, et le dementelement qui va suivre.

plant enters permanent decommissioning stage
18 September 2020


The Swiss Federal Nuclear Safety Inspectorate (ENSI) has announced that the operating licence of the Mühleberg nuclear power plant (KKM) has been replaced with a decommissioning order issued by the Federal Department of Environment, Transport, Energy and Communication (DETEC). The single unit 373 MWe boiling water reactor began operations in 1972.

The plant was shut down in December 2019, but has only been considered permanently out of service since 15 September this year, and its operating licence has now been replaced by the decommissioning order, ENSI said.

In a separate statement, BKW said the milestone had been reached as planned - around nine months after the final cessation of service operations on 20 December 2019 - and that the coronavirus pandemic had so far had no impact on the schedule.

........

https://www.world-nuclear-news.org/Arti ... ssioning-s

[moinsdewatt]

Le réacteur 2 de Ikata de 538 MWe pourra être demantelé suite à l'examen de l'autorité de régulation nucléaire du Japon.
Pour Ikata 1 de même puissance l'autorisation avait été donné en 2016.

Regulator approves Ikata 2 decommissioning plan

07 October 2020

Japan's Nuclear Regulation Authority (NRA) today approved Shikoku Electric Power Company's decommissioning plan for unit 2 of its Ikata nuclear power plant in Ehime prefecture. Decommissioning of the unit is expected to be completed by 2059.

Ikata 2 is a 538 MWe pressurised water reactor that began operating in March 1988. It was taken offline in January 2012 for periodic inspections. Shikoku announced in March 2018 that it did not plan to restart the reactor. It said the cost and scale of modifications required to upgrade the 40-year-old unit to meet the country's revised safety standards made it uneconomical to restart it.
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Lire https://www.world-nuclear-news.org/Arti ... oning-plan

[moinsdewatt]

Le régulateur du nucléaire Japonais approuve le plan de démantèlement de Tepco de la centrale de Fukushima Daini à 4 réacteurs.

Fukushima Daini decommissioning plan approved

28 April 2021

Japan's nuclear regulator today approved Tokyo Electric Power Company's (Tepco's) decommissioning plan for the four reactors at its Fukushima Daini nuclear power plant, close to the damaged Fukushima Daiichi plant.


The Fukushima Daini plant (Image: Tepco)

Fukushima Daini is a four-unit boiling water reactor plant about 11km south of Fukushima Daiichi. The units entered commercial operation between 1982 and 1987. Although they experienced an emergency, the units were not damaged by the March 2011 earthquake and tsunami that caused the nuclear accident at the neighbouring Fukushima Daiichi plant. The four reactors have since been maintained in cold shutdown.

The company said in June 2018 that it was considering decommissioning the plant in conjunction with Fukushima Daiichi in response to local demands for a decision on the fate of the site. In July 2019, Tepco announced its official decision to decommission the units.

The company submitted its plan for decommissioning Fukushima Daini to the Nuclear Regulation Authority (NRA) in May 2020. According to the plan, the decommissioning process is expected to take 44 years. The 10,000 fuel assemblies held in the units' storage pools will be removed over a 22-year period and will be reprocessed. Tepco plans to construct an on-site dry cask storage facility "to systematically progress fuel removal from the spent fuel pool". About 50,000 tonnes of radioactive waste will be generated from the plant's decommissioning. The total cost of decommissioning Fukushima Daini, excluding the cost of nuclear fuel disposal, is estimated at more than USD2.5 billion.

Responding to the NRA's approval of its plan today, Tepco said: "When implementing the decommissioning of the Fukushima Daini nuclear power station, we will give top priority to ensuring safety and will work to ensure the peace of mind of the local people."

Tepco's decision to decommission the Daini plant along with the Daiichi plant means that all ten of its reactors in Fukushima prefecture will be scrapped.

The utility also owns the Kashiwazaki-Kariwa nuclear power plant in Niigata prefecture. It plans to restart units 6 and 7 of that plant.

https://www.world-nuclear-news.org/Arti ... n-approved