TWR a new generation small nuclear reactor

[Aumicron]

A small new generation nuclear reactor (between 10 and 100 megawatts), capable of operating 100 years without being recharged with fuel. Not bad?

And in addition, Bill Gates is interested in this project with a merger with Toshiba:

http://www.tdg.ch/actu/economie/toshiba ... 2010-03-23

A first step towards a softer nuclear?

[dedeleco]

Disadvantages

Disadvantages

The concept of the TWR goes back sixty years and physicists around the world reactivated it in the 1990s. In 2000, the Forum Generation IV, a group of international experts, had not however considered it promising enough, explains Bernard Bonin, deputy scientific director of the CEA (Commissariat à l'énergie atomique). The physicist from Saclay recognizes the interest of the reactor but underlines its drawbacks. To operate for decades, the TWR will need large amounts of fuel and will have to be a very expensive installation. Another concern is safety: will the materials be able to withstand long-term irradiation? Bernard Bonin "persists and signs" in his skepticism towards the TWR. However, the support announced yesterday by Japanese jet engine manufacturer Toshiba for Bill Gates is, he admits, a real surprise.

Node-Langlois, Fabrice

http://marches.lefigaro.fr/news/societe ... =139828090



We must introduce a tax on real pollution in particular nuclear (and not the CO2 Sarkozy) to ensure the future nuclear cleansing by our grandchildren over centuries and therefore cost tremendous, given the duration and future disasters !!

Nuclear must be infallible in perpetuity, humanly impossible, and so we will have another Chernobyl
[/ Quote]

[Remundo]

He's a little breeder ...

A fabulous tool for producing Pu 239 from U238 while producing electricity.

On the military level, the excess of Pu239 can be easily isolated to obtain 99% pure Pu. This type of reactor allows the proliferation of the A Plutonium bomb. It takes only 10 to 15 kg of Pu 239 to make a warhead.

On the civil level, a lot of waste in fission products, about the same as with U235 fission. The most famous of which are HAVLs (high activity, long life)

Otherwise from an energy point of view, to be trivial, it torches GWh as much as you want. It's almost inexhaustible with the thousands of tonnes of depleted U238 lying around everywhere ...

France has stopped its breeding program with Super Phoenix.

@+

[sen-no-sen]

Hopefully the so-called central will not be operated under windows

The fashion for small nuclear power plants is a serious risk for the future, the Russians have also developed small power plants, they will be very vulnerable and the risk of dissemination is enormous.
You really have to be irresponsible to launch this type of project!

[Christophe]

France has stopped its breeding program with Super Phoenix.

Anyone know the causes?

Economic? Technological? Politics? Geopolitics?

Otherwise, small ("conventional") nuclear reactors have been used for 40 years in maritime propulsion (submarines to begin with and large surface vessels, etc.)

Examples: http://fr.wikipedia.org/wiki/Classe_Akoula
who uses a http://fr.wikipedia.org/wiki/R%C3%A9act ... %D0%9A-650

On the other hand, I don't understand the difference between the figures: 47 hp on the one hand and 600 MWT on the other at 190% efficiency, we have almost twice as much in CV ...

[dedeleco]

basic answer:
Have you seen a little bit of sodium weighing less than a gram burn in water ????
5000 tonnes of liquid sodium on water gives what??
The absolute horror, and I was quieter after its clean and clear stop !!!

http://fr.wikipedia.org/wiki/Surg%C3%A9n%C3%A9ration

The Superphenix reactor cost for its construction, according to a report of the Court of Auditors dating from 1997, 60 billion francs or 9,1 billion euros. The turnover from the resale of electricity, estimated at 1,4 billion euros for operation from 1986 to 1996, would have reduced this cost to 7,7 billion euros (excluding dismantling).

http://fr.wikipedia.org/wiki/Superph%C3%A9nix

The plant contains five tonnes of plutonium and 5 tonnes of liquid sodium, which ignites spontaneously on contact with air, and explodes on contact with water producing hydrogen, which is itself extremely reactive. Furthermore, we still do not know how to put out a fire of more than a few hundred kilograms of sodium.

As early as 1976, an EDF engineer - JP Pharabod - declared in Science et Vie (n ° 703, April 1976) that "it is not unreasonable to think that a serious accident occurring in Superphénix could kill more than one million people ”, which sparked a lively controversy in France over the security of Superphenix.

On December 8, 1990, part of the roof of the turbine hall collapsed due to snow, requiring the reconstruction of the superstructure of half the building. The reactor was shut down that day. The generator building and the reactor are separate, so there could not have been any serious consequences.

One of the safety issues is the increase in the viscosity of the heat transfer fluid (liquid sodium) in the event of pollution that is poorly controlled.

Stop [edit]

Upon the arrival of the plural left, the Greens demanded that Superphénix be stopped and dismantled. The Production and Trade Commission of the National Assembly noted in April 1997 that "the immediate shutdown of the reactor is, in any event, more costly than the continuation of the activity even burdened with a low rate infrastructure availability ”. In addition, the Senate report concludes, on the balance sheet of the Court of Auditors, that "in total, taking into account EDF's assumptions, delay the cessation of operation of the power station until the end of the agreement between the partners in NERSA, ie at the end of 2000, would probably have been globally neutral in financial terms. "

Extracts from the Senate report drawn up in 1998:

“The cost of building and operating Superphénix exceeded initial estimates. In its report of January 1997, the Court of Auditors estimated it at 60 billion francs distributed between the partners of the European consortium NERSA43 (*) up to 51% for EDF, 33% for the Italian electrician Enel and 16% for the SBK consortium, which brings together the German electricians RWE, Dutch SEP and Belgian Electrabel. In reality, taking into account the value of the electricity supplied to the network by the reactor, the expenses would amount, according to her, to 40,5 billion francs [4]. "

In 1997, Lionel Jospin, Prime Minister of the French Republic, announced: "Superphénix will be abandoned". Lionel Jospin having made his decision, a ministerial decree of December 30, 1998 led to his final judgment. The reasons given, influenced by public pressure, were that the low price of uranium no longer justified investments in this technology.

http://en.wikipedia.org/wiki/Superph%C3%A9nix

Power production was halted in December 1996 for maintenance. However, following a court case led by opponents of the reactor, on February 28, 1997 the Conseil d'État (Supreme State Administrative Court) ruled that a 1994 decree, authorizing the restart of Superphénix, was invalid. In June 1997, one of the first actions of Lionel Jospin on becoming Prime Minister was to announce the closure of the plant "because of its excessive costs". Jospin's government included Green ministers; pro-nuclear critics have argued that Jospin's decision was motivated by political motives (ie, to please his Green political allies) rather than rational considerations. However, the reactor did not produce electricity most of the time in its last ten years because of malfunctions [4] (in fact it was consuming substantial power to maintain sodium above melting temperature).

[Christophe]

basic answer:
Have you seen a little bit of sodium weighing less than a gram burn in water ????
5000 tonnes of liquid sodium on water gives what??
The absolute horror, and I was quieter after its clean and clear stop !!!

Thank you for the answer, but I would be quieter when you stop YELL thank you...

[Napo dwarf]

Tax must be introduced on real pollution, particularly nuclear (and not only Sarkozy's CO2)

what taxation of Co2?

[dedeleco]

According to the TV, Sarkozy is asking on a European scale for CO2 taxation, following the elections !!!

[dedeleco]

For Christophe, without shouting, it would be useful and pleasant to have a letter size between normal and large to avoid shouting too much, but nevertheless draw attention to a crucial fact, without shouting, but easily visible.
A tax on all pollution, and the real and future costs to compensate and insure, future disasters, like asbestos, Chernobyl, earthquakes, floods, on a global scale, is fundamental and to be strongly defended !! !
Is that the real cost ??

I have not tried very large, it fills the whole server ?????