Why dismantle nuclear power plants?

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moinsdewatt
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by moinsdewatt » 01/12/15, 14:14

Areva chosen to dismantle the Superphénix nuclear reactor vessel

By Astrid Gouzik - Nouvelel Factory the 01 December 2015,

Areva announced, Tuesday, December 1, the signing of a contract of "several tens of millions of euros" with EDF to dismantle the internal equipment of the reactor vessel of the Superphénix nuclear reactor, in Creys-Malville (Isère).

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At 30 km from the Bugey nuclear power plant, the Creys-Malville site houses the Superphénix reactor. It was originally a prototype of fast neutron reactor with heat transfer fluid, it followed the experimental nuclear reactors Phénix and Rapsodie. This model of 1 200 megawatts (MW) bordering the Rhone, was operational from 1986 to 1996 but produced electricity only a few years due to repeated damage. Its closure was decided by the government of Lionel Jospin after the victory of the plural left in the early general elections of 1997.

Since 1999, EDF is working to dismantle the plant ... A heavy construction site planned to last 30 years. In 2015, the dismantling of the reactor vessel had to be initiated. An operation that should end in 2024 according to the schedule established by EDF.

Several tens of millions of euros

To accomplish this task, dismantle the internal equipment of the tank, Areva has just been chosen. The contract covers the preliminary studies, the qualification of the processes, the manufacture of the tools and the works of dismantling of the equipments, specified the public specialist of the nuclear in a statement. The market also includes the packaging of waste, especially highly radioactive waste.

Areva stressed that this was the first project to dismantle such equipment on a reactor of more than 1 000 megawatts in France. It will be carried out by Areva's dismantling and services activity and will mobilize more than 50 people in the peak phase of construction.

Once the dismantling of the tank is completed, then will come the demolition stage of the buildings which should take 4 years.

http://www.usinenouvelle.com/article/ar ... ix.N366065
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by Grelinette » 01/12/15, 15:55

Without wanting to play the fly of the boat and to make the bird of bad omen, I sense the following future situation:

1) The cost of dismantling nuclear power plants (and incidentally that of waste treatment / storage) has not been anticipated or provisioned; therefore there will be no money for its "cleaning" activities when they must be insured (which is starting to come).

2) the population, you and I, we are not only strongly encouraged to reduce our electricity consumption, but also to equip ourselves with local means of production to get closer to a certain energy independence (small wind, photovoltaic, geothermal , etc).

1) + 2) => mechanically the market for the consumption of electricity produced and sold by large industries should gradually decrease, and consequently the turnover of its industries as well.

In short, we have not planned money for the future, and self-financing will be increasingly difficult for nuclear recycling.
This is perhaps one of the reasons for the abysmal losses announced by Areva for 2014 = 5 Md €.

We will have a hot potato in the legs and nothing to get rid of it! ... (The Germans may have anticipated this market?)

(Fortunately there is an ongoing project to charter space shuttles filling them with all this nuclear waste to send them to the sun so that it crash! ...)
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by Christophe » 01/12/15, 16:03

Grelinette wrote:2) the population, you and I, we are not only strongly encouraged to reduce our electricity consumption, but also to equip ourselves with local means of production to get closer to a certain energy independence (small wind, photovoltaic, geothermal , etc).


You find?

I think quite the opposite:

a) The subsidy market has sunk the PV market to a large extent (and now that the PV is profitable WITHOUT a SUBSIDY, by chance we hear less about it!)

b) Belgium (finally Wallonia) has just voted a tax of more than 17 000 € per year per turbine MAT (whatever its power ...) ... while Belgium is in deficit of electricity since 18 months (the majority of Belgian reactors are out of service at the moment)! We do not care who?

No no, in spite of their speech, the governments do not want especially to lose the hand put on (the taxation of) the energy !!!

Grelinette wrote:(Fortunately there is an ongoing project to charter space shuttles filling them with all this nuclear waste to send them to the sun so that it crash! ...)


1er April?
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by Remundo » 01/12/15, 16:17

50 people, it does not seem much to me to dismantle such a fissile cathedral ...

unless they have time ... and not money (tens of millions, what a good joke: nothing that Brennilis has already cost more than half a billion and it's not over ...)
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by moinsdewatt » 01/12/15, 18:19

Grelinette wrote: In short, we have not planned money for the future, and self-financing will be increasingly difficult for nuclear recycling.
This is perhaps one of the reasons for the abysmal losses announced by Areva for 2014 = 5 Md €.



Foolery !

ARVA losses have nothing to do with nuclear recycling at all.

AREVA 's losses come from their depreciation of assets in the unfortunate URAMIN case, and losses due to the delay of several years on the site of the Finnish EPR.
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by moinsdewatt » 01/12/15, 18:23

Grelinette wrote:2) the population, you and I, we are not only strongly encouraged to reduce our electricity consumption, but also to equip ourselves with local means of production to get closer to a certain energy independence (small wind, photovoltaic, geothermal , etc).


Oh? I do not see anything like it around me.
It's completely marginal.
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by Christophe » 01/12/15, 18:27

+ 1 and I just gave the explanation : Cheesy:
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by chatelot16 » 01/12/15, 21:31

to dismantle the old nuclear power plant is to put the cart before the ox

the main thing is to manage the society to have less need of nuclear power station, and if it is less necessary it will turn less often

I prefer to have 10 old nuclear power plant turning part-time 5 turning full time without possibility to make the repairs that ask the old stuff

our nuclear power plant is old, it will ask more and more time to maintain ... it should not be removed some to overload the other ... must be kept in working order to manage with the minimum risk

it's a bit like the one with old cars, do not scrap a car that still works to see that it's the one we kept that breaks down

with a number of central superabundant activity can easily stop the one that has the slightest defect, to repair quietly by relying on others

when there is an exces- sive productivity pressure there will be accidents

I do not like nuclear power, I prefer new solutions, but as long as there is still nuclear I prefer that it is not under constraint of productivity
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Re: Why dismantle nuclear power plants?




by Christophe » 11/06/16, 13:36

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by moinsdewatt » 28/04/17, 17:27

CHOOZ A: EDF STARTS THE DISMANTLING OF THE REACTOR TANK

26 Apr 2017 energeek

In an increasingly competitive global dismantling market, the French group EDF has the ambition to become one of the leaders in nuclear decommissioning internationally, and intends to rely on its experience in France. The first pressurized water reactor to be dismantled in the French fleet, Chooz A allows to test and validate technical solutions that can be used for other nuclear sites. Launched in 2007 for a period of fifteen years, this dismantling site entered Wednesday, 8 March 2017, in its final phase intended to cut the most sensitive part of the installation: the reactor vessel.

A technological demonstrator of construction and deconstruction


Nestled in a loop of the Meuse in the heart of the Ardennes, the Chooz power plant is not limited to its two units of 1.450 megawatts (MW) each, but also contains in its basements the "little Chooz" (also called Chooz A ), a prototype of the pressurized water reactor model that makes up the majority of French and world nuclear power plants. Commissioned in 1967 and definitively shut down in 1991, it displayed 305 MW production power and continued, even out of service, to fulfill a technological demonstrator role.

Entered the phase of deconstruction in 2007, it is indeed the scene of a non-standard shipyard whose feedbacks will complete the French know-how in terms of dismantling, and will benefit in the future for all hexagonal park. If the working conditions are particular here because of the underground installation of the reactor, this site allows since the beginning of the works to test the various regulatory and technical stages of the long process of nuclear dismantling. In particular, this year it crossed a new landmark with the opening of the reactor vessel, twenty years after the unloading of the fuel..

Dismantling of the tank: heart of the installation

In accordance with the schedule originally planned and in compliance with the budget allocated for this type of operation (between 350 and 400 million euros), the yard has therefore entered since March in its final phase consisting in the deconstruction of the reactor vessel, the most delicate operation of the entire project. Centerpiece of the installation, this steel tank weighs more than 220 tons and is immersed underground, at the bottom of a pool eight meters deep and about 1000 cubic meters, a volume equivalent to that of a municipal swimming pool of 25 meters long. It contained (before it was removed in the 1990 years) the nuclear fuel necessary for the operation of the plant, and was therefore logically exposed to ionizing radiation more than any other part of the reactor.

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This particularity imposes on the operator a particular attention and a maximum precaution. In order to avoid the exposure of the teams of engineers and technicians in charge, the cutting operations will be carried out in total immersion, water still constituting at the moment the best radiological barrier. Remotely operated robots equipped with circular saws will allow them to perform each maneuver remotely under optimal conditions of safety, security and radiation protection. Already successfully tested on other dismantling sites, particularly in the United States and Spain (the Spanish reactor Zohrita for example is very similar to that of Chooz A), this size intervention should end on the horizon 2022 , and allow decommissioning and gradual rehabilitation of the site. To date, only the lid of 50 tons has been removed using a lifting bridge and will soon be sent to the storage center of the National Radioactive Waste Management Agency in Aube.

A pilot project "representative" of the French nuclear fleet

As for the rest of the plant, the Chooz A dismantling site is coming to an end and is already a reference in the world of the nuclear industry. Since 2007 and the full approval of the Nuclear Safety Authority (ASN), several unpublished operations have been carried out. Cutting plants and waste storage silos have been built inside the site and have facilitated the primary circuit assembly, as well as the extraction and decontamination of the main components such as the four generators. steam or pressurizer.

Today, the majority of equipment has already been evacuated (fuel cooling pool, backup systems, pumps, circuits and auxiliary auxiliaries), demonstrating the technical feasibility of this type of project, and especially the EDF group's capacity to meet the technological challenge of nuclear decommissioning within the prescribed deadlines.

https://lenergeek.com/2017/04/26/centra ... -reacteur/
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