[Nucléaire] Relance du nucléaire aux USA.... ou pas ?

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 08 avr. 2023, 11:32

Démolition aux USA d'un réacteur de recherche septuagénaire :
Demolition of famous US reactor begins
06 April 2023

The Low Intensity Test Reactor (LITR) at Oak Ridge National Laboratory (ORNL) became world-famous when a photographer first captured a blue glow caused by radiation in the pool above the reactor. That photo appeared on the cover of the October 1951 issue of Scientific American.
....................
https://www.world-nuclear-news.org/Arti ... tor-begins

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 09 avr. 2023, 16:10

suite de ce post du 13 janvier 2023 viewtopic.php?p=2360888#p2360888
Plant Vogtle Unit 3 generates power, links to grid for 1st time

Apr. 1, 2023

eorgia Power announced Saturday it has achieved another important milestone for the new nuclear units under construction at its Plant Vogtle Units 3 and 4 nuclear expansion project.

The generator at Vogtle Unit 3 has generated electricity for the first time, and the unit has successfully synchronized and connected to the electric grid.
https://www.wrdw.com/2023/04/01/plant-v ... -1st-time/

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 06 mai 2023, 11:30

Les États-Unis souhaitent relancer leur filière de production d'uranium locale

RFI le : 05/05/2023 Par : Guillaume Naudin

« Investir en Amérique et produire en Amérique », c’est l’une des priorités de l’administration Biden. Elle est valable pour de nombreux secteurs de l’économie, y compris pour la production d’uranium pour alimenter les centrales. Mais le pays part de loin.

De notre correspondant à Washington,

Avec 95 réacteurs nucléaires répartis dans 65 centrales, les États-Unis sont le plus grand consommateur mondial d’uranium. Un combustible importé dans son immense majorité. Car si le pays, il y a encore une quarantaine d’années, exploitait 250 mines, aujourd’hui, la production nationale peine à s’élever au-dessus de zéro. Pour une raison essentielle : le coût. Importer coûte moins cher que de produire sur place. Mais c’est en train de changer. La mine d’Alta Mesa, au Texas, doit commencer à être exploitée à la fin de l’année 2024.

Même chose pour celle de Shootaring Canyon, dans l’Utah. L’entreprise qui la possède est en train d’évaluer ce qui est nécessaire pour doubler la production et la productivité par rapport à ce qu’elle était avant sa fermeture il y a plusieurs années. Derrière cette relance, il y a une volonté politique. Pour des raisons d’indépendance énergétique et des raisons stratégiques. Les importations actuelles viennent principalement du Kazakhstan, du Canada, mais aussi de Russie, pour pratiquement 15 % du total. C’est beaucoup pour un pays avec lequel les relations sont au plus bas depuis l’invasion de l’Ukraine. L’entreprise russe qui produit l’uranium, Rosatom, est soumise à des sanctions en raison de ses liens avec le secteur militaire russe.

La volonté de relancer une filière locale est inscrite noir sur blanc dans la loi de réduction de l’inflation. Puisque l’électricité nucléaire est décarbonée, 700 millions de dollars d’aides sont prévus à cet effet sur les 350 milliards en faveur du climat prévu par la loi. Mais toutes les questions environnementales ne sont pas réglées. L’extraction de l’uranium par le passé a laissé de mauvais souvenirs. Les Indiens Navajo sont notamment très réticents. Les mines sont souvent situées sur leur territoire. Ils ont eu à faire face à des problèmes de pollution et de cas de cancers anormalement élevés lorsque l’exploitation battait son plein.
https://www.rfi.fr/fr/podcasts/chroniqu ... ium-locale

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 28 mai 2023, 11:10

Kraken Energy signs definitive option deal for Utah uranium project
Historically, the region produced 240 million pounds of natural uranium ore concentrate.


May 24, 2023
https://www.mining-technology.com/news/ ... rts-point/

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 11 juin 2023, 10:57

Un projet de mine d'Uranium au Nouveau Mexique :
Anfield to buy Marquez-Juan Tafoya uranium project from enCore Energy

By NS Energy Staff Writer 07 Jun 2023

Located in the Grants Uranium Mineral District, the Marquez-Juan Tafoya project has a current resource estimate of 18.1 million pounds of uranium defined by 604 drill holes
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lire : https://www.nsenergybusiness.com/news/a ... re-energy/
......
Located in the Grants Uranium Mineral District, 50 miles west-northwest of Alberquerque, the Marquez-Juan Tafoya project holds historically indicated uranium resources of 18.1 million pounds.

Last year, organic food sales in the US broke through $60 billion for the first time. The Organic Trade Association’s (OTA) 2023 Organic Industry Survey reported that the sector grew 4% from 2021, double the growth between 2020 and 2021.…

The project comprises two adjacent properties, Marquez and Juan Tafoya, where extensive mineral exploration was carried out by drilling defined significant uranium resources in the 1970s to early 1980s.

The properties were previously developed separately by mining companies Kerr-McGee and Bokum Resources, respectively.
https://www.mining-technology.com/news/ ... m-project/

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 15 juin 2023, 16:26

Les centrales nucléaires aux USA ont utilisées 15 578 t d'Uranium en 2022.
Seulement 5% vient du sol Etats Unien.
USA plants continue to rely on foreign sources of uranium supply
15 June 2023

US nuclear plant owners and operators purchased less uranium in 2022 than in 2021, and at a higher price, according to the US Energy Information Administration's (EIA) latest annual uranium marketing report. Most of the uranium delivered in 2022 was of foreign origin, with Canada and Kazakhstan together providing more than half the total.

Image
US uranium purchases continue to be dominated by foreign suppliers (amounts are thousands of pounds U3O8e) (Image: EIA)

The EIA's 2022 Uranium Marketing Annual Report, published on 13 June, provides detailed data on uranium marketing activities in the USA from 2017 to 2022, and summary data back to 2001. The information is based on data collected through the EIA's Uranium Marketing Annual Survey - known as Form EIA-858 - which collects data on contracts, deliveries, enrichment services purchased, inventories, use in fuel assemblies, feed deliveries to enrichers, and unfilled market requirements for the next 10 years.

The 40.5 million pounds U3O8 equivalent (15,578 tU) total uranium purchased by the owners and operators of the USA's civilian nuclear power reactors in 2022 was 13% down on 2021's total of 46.7 million pounds U3O8e. The weighted average price of USD39.08 per pound for 2022's purchases was 15% higher than the 2021's weighted average price of USD33.91 per pound, and the highest since 2016.

Most of 2022's uranium deliveries were of foreign origin, with Canada the top source at 27% of total deliveries, followed by Kazakhstan (25%), Uzbekistan (11%) and Australia (9%). US -origin material accounted for 5% of the total. Some 15% of the uranium delivered was purchased under spot contracts at a weighted average price of USD40.70 per pound, with the rest under long-term contracts at a weighted average price of USD38.81 per pound.

A total of 35 million pounds U3O8e of natural uranium feed was delivered to enrichers, with 41% of the feed going to US enrichment suppliers, and some 14.2 million SWU of enrichment services purchased by US plant owners and operators in 2022. Nearly three-quarters of this - 73% - was from foreign-origin SWU. Some 3.4 million SWU was supplied by Russia - only slightly less than the 3.9 million of US-origin SWU purchased in the year.

At the end of the year, total US commercial uranium inventories (including inventories owned by plant owners and operators, brokers, converters, enrichers, fabricators, producers and traders) stood at 140 million pounds U3O8e, down 1% from the 141.7 million pounds total at the end of 2021. Contracted deliveries and unfilled market requirements represent maximum anticipated market requirements of 402 million pounds U3O8e over the next 10 years for plant owners and operators, the report found.
https://www.world-nuclear-news.org/Arti ... sources-of

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 17 juin 2023, 11:57

suite de ce post du 12 nov 2022 viewtopic.php?p=2357744#p2357744
Centrus HALEU plant receives regulatory clearance

15 June 2023

The US nuclear fuel and services company Centrus has completed its operational readiness reviews and received regulatory approval to possess uranium at its Piketon, Ohio site and introduce uranium into the cascade of centrifuges it has constructed there. The company said it remains on track to begin production of high-assay low-enriched uranium (HALEU) at the plant before the end of the year.

Image
The Piketon centrifuge cascade (Image: Centrus)

Centrus began construction of the demonstration cascade of 16 centrifuges in 2019 under contract with the US Department of Energy (DOE), and last year secured a further USD150 million of cost-shared funding to finish the cascade, complete final regulatory steps, begin operating the cascade, and produce up to 20 kg of HALEU by the end of this year. The operational readiness reviews were required under the Centrus licence from the US Nuclear Regulatory Commission (NRC), which was amended in 2021 to allow the Piketon facility to produce HALEU.

HALEU fuel contains uranium enriched to between 5% and 20% uranium-235 - higher than the uranium fuel used in light-water reactors currently in operation, which typically contains up to 5% uranium-235. It will be needed by most of the advanced reactor designs being developed under the DOE's Advanced Reactor Demonstration Program. But the lack of a commercial supply chain to support these reactors has prompted the DOE to launch a programme to stimulate the development of a domestic source of HALEU.

"Centrus continues to meet every contract milestone on time and on budget, putting us in position to pioneer US HALEU production to meet the needs of the department and the nuclear industry," said Centrus President and CEO Daniel Poneman. "By establishing a secure, reliable American source of HALEU, we can help enable the commercialisation of a whole new generation of US-designed advanced nuclear reactors to supply the carbon-free energy the world needs."

Construction of the cascade and most of the support systems is now complete, and initial testing has been completed, Centrus said. Next steps will be the construction of the on-site HALEU storage area and final testing activities prior to operation, with initial HALEU production set to begin by the end of the year.

Centrus has previously said it could scale up the Piketon facility for expanded HALEU production, subject to sufficient funding or offtake contracts. A full cascade of 120 individual centrifuge machines, with a combined capacity of approximately 6,000 kilograms of HALEU per year, could be brought online within about 42 months of securing funding, according to the company.
https://www.world-nuclear-news.org/Arti ... -clearance

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 17 juin 2023, 12:17

suite de ce post du 17 juillet 2021 viewtopic.php?p=2322817#p2322817
US regulators conclude Hermes safety review

16 June 2023

The US Nuclear Regulatory Commission (NRC) has issued its Final Safety Evaluation Report (FSER) for Kairos Power's application to build the Hermes molten salt test reactor at a site in Oak Ridge, Tennessee. The company says it expects to receive a construction permit for the first-of-a-kind reactor later this year.

Image
How the KP-FHR could look (Image: Kairos)

NRC's evaluation concludes that there are no safety aspects that would preclude issuing a construction permit for the reactor and comes after the agency's independent Advisory Committee on Reactor Safeguards provided the results of its review, recommending that the construction permit for the Hermes demonstration reactor be approved.

Kairos submitted its permit application in two parts, in September and October 2021, but the company began extensive pre-application engagement with the NRC in 2018. The NRC accepted the Hermes CPA for review in November 2021, committing to an accelerated 21-month review timeline, and has completed it in 18 months - well ahead of schedule, according to Andrea Veil, director of the NRC's Office of Nuclear Reactor Regulation. "This reflects the NRC's commitment to maintaining safety, by applying risk-informed approaches, while improving efficiency," she said.

"We are pleased to have worked closely with the NRC staff to complete a thorough, efficient, and innovative review, which is encouraging for future deployment of advanced nuclear reactors," said Kairos Vice President of Regulatory Affairs Peter Hastings. "We look forward to continuing our close collaboration with the staff and the Commission to support the Final Environmental Impact Statement and complete the mandatory hearing."

Kairos is taking a "rapid iterative" approach to development, which the company says reduces risk on the path to commercialisation and establishes confidence for build and construction. The company will have to submit a separate application in the future for an operating licence. It said the Hermes construction permit application is laying the groundwork for this application which will, in its turn, generate lessons to inform the license applications for future commercial deployments.

Hermes will be a 35 MW (thermal) non-power version of the company's fluoride salt-cooled high temperature reactor - the KP-FHR, which uses TRISO (TRI-structural ISOtropic) fuel pebbles with a low-pressure fluoride salt coolant. The demonstration reactor has been selected by the US Department of Energy to receive USD629 million in cost-shared risk reduction funding over seven years under the Advanced Reactor Demonstration Program, and is intended to provide operational data to support the development of a larger version for commercial deployment.

A site at the East Tennessee Technology Park in Oak Ridge has been selected for the demonstration reactor, and TRISO fuel pebbles will be produced at the Los Alamos National Laboratory's Low Enriched Fuel Fabrication Facility under an agreement announced in late 2022. The company has also commissioned a plant to produce high-purity fluoride salt coolant - known as Flibe - in partnership with Materion Corporation. The Molten Salt Purification Plant, in Elmore, Ohio, has now shipped its first batch of the coolant to Kairos Power’s testing facility in Albuquerque, New Mexico, to support Engineering Test Unit (ETU) operations, the company said in a separate announcement.
https://www.world-nuclear-news.org/Arti ... ety-review

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 25 juin 2023, 15:45

Bill banning uranium imports from Russia passes US House subcommittee

Reuters | May 17, 2023

A bill banning Russian uranium imports to the United States gained momentum on Tuesday by passing a committee in the US House of Representatives.


The bill, sponsored by Representative Cathy McMorris Rodgers, a Republican, passed 18-12 in the House subcommittee on energy, climate and grid security.

After Russia invaded Ukraine last year, the United States banned imports of its oil and imposed a price cap with other Western countries on sea-borne exports of its crude and oil products, but it has not banned imports of its uranium.

The United States imported about 14% of its uranium from Russia in 2021, compared to 35% from Kazakhstan and 15% from Canada, according to the US Energy Information Administration. The United States was the source of about 5% of uranium used domestically that year, the EIA said.

“The war in Ukraine has made it abundantly clear we cannot be at the whims of Russia for our fuel supply,” said Representative Jeff Duncan, the chair of the committee. “It should be a bipartisan, national security objective to wean the United States industry off Russian uranium imports.

A similar bill has been referred to the energy committee in the US Senate. Before becoming law, the legislation would have to pass both chambers of Congress and be signed by President Joe Biden.

The House bill contains waivers allowing the import of low-enriched uranium from Russia if the US energy secretary determines there is no alternative source available for operation of a nuclear reactors or US nuclear energy company, or if the shipments are in the national interest.

The waivers would gradually limit allowed imports of Russian uranium from about 578,900 kilos (1,276,256 lb) in 2023, to about 459,000 kilos (1,011,921 lb) in 2027, with any waivers ending by 2028.
https://www.mining.com/web/bill-banning ... committee/

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 08 juil. 2023, 16:02

Urenco va agrandir les capacités de son usine d'enrichissement par centrifugation du Nouveau Mexique.
Urenco to expand US enrichment plant

07 July 2023

Uranium enrichment services provider Urenco has announced plans to increase capacity at its plant in Eunice, New Mexico - the only operating commercial uranium enrichment facility in North America - by 15%. New commitments from US customers for non-Russian fuel underpin this investment, the company noted.

Image
The UUSA plant in (Image: Urenco)

It said the project will see multiple new centrifuge cascades added to the existing Urenco USA (UUSA) plant, and will be the first project to be delivered as part of the company's capacity programme, which "will strengthen the nuclear fuel supply chain both in the US and globally".

Urenco said the capacity programme is a long-term plan to extend and refurbish enrichment capacity at its sites to meet increasing customer demand "as more countries and utility companies turn to nuclear for the first time, or seek to extend and/or diversify fuel supplies for existing nuclear operations".

The expansion of the Eunice plant - operated by Louisiana Energy Services LLC (LES) - will provide an additional capacity of around 700 tonnes of separative work units (SWU) per year, with the first new cascades online in 2025. The plant currently has a production capacity of 4600 tSWU per year.

In March 2015, the US Nuclear Regulatory Commission approved a licence amendment allowing Urenco to expand its Eunice enrichment plant. The amendment is related to LES's intention to expand its enrichment capacity at the UUSA facility by adding three new separation building modules and associated support facilities, in a phased approach over the next several years. Doing so would allow Urenco USA's total enrichment production capacity to rise from 3.7 million SWU to as much as 10 million SWU.

"Urenco is committed to supporting customers with their energy security and carbon reduction needs and this investment is a further sign of the exciting momentum behind nuclear, a reliable and low-carbon source that can maintain baseload energy and help us achieve net-zero," said Urenco CEO Boris Schucht. "We have the licences, designs, technology and proven capability to expand our capacity, and we are already seeing an increase in demand for our services from existing customers and new ones.

"As a leading enrichment company in the Western world, we have the duty to respond to the needs of the market. We will continue to monitor, forecast and support our customers and governments as we look to take further investment decisions across our enrichment sites."

Urenco also operates three enrichment facilities in Europe: at Capenhurst in the UK, Almelo in the Netherlands and Gronau in Germany.
https://www.world-nuclear-news.org/Arti ... ment-plant

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 14 juil. 2023, 11:23

Re examen d'une ancienne mine d'Uranium, et qui contient aussi du Vanadium.
Work begins to re-open US underground uranium mine

29 June 2023

Consolidated Uranium Inc has announced the start of "comprehensive" work programmes including the reopening of the underground workings at its 100%-owned Tony M uranium mine, fifteen years after it last produced uranium. The Vancouver-based company also plans to investigate the vanadium potential of the underground mine in Utah.

Image
Preparing for the 2023 drilling programme at Tony M (Image: Consolidated Uranium)

Tony M is fully developed and permitted, and produced nearly one million pounds of U3O8 during two different periods of operation from 1979-1984 and from 2007-2008. It is one of three past-producing uranium mines in Utah owned by Vancouver-based Consolidated Uranium.

Historically, it had been thought that there was "no vanadium of consequence" at the mine, but in the process of completing an NI 43-101 technical report on the project, an inverse relationship between uranium and vanadium mineralisation had been discovered. This led to the recommendation by SLR International Corporation - who prepared the technical report - to reopen the underground for a sampling programme as well as carrying out a drilling programme.

"We view the reopening of the underground as a first step in the restart of the Tony M Mine," Consolidated Uranium President and COO Martin Tunney said. "Any vanadium mineralisation of economic value would allow us to reach that goal that much faster," he added.

The NI 43-101 technical report for Tony M, dated 9 September 2022, estimates indicated mineral resources of 6.6 million pounds U3O8 (2534 tU) and inferred resources of 2.2 million pounds. The 2023 drilling programme - which will include up to 59 vertical drill holes, totalling some 38,000 feet (about 11,600 metres) across the deposit - and the underground sampling programme are designed to collect detailed information on vanadium mineralisation with the ultimate aim of calculating a vanadium mineral resource, but might also allow for some of the current estimated mineral resources to be converted from the 'inferred' to the 'indicated' category.

"With uranium market fundamentals showing significant strength and the unquestionable need and political support for domestic US uranium production, we believe advancing the Tony M project toward a near term production decision is the correct course of action," Chairman and CEO Phil Williams said. "The programmes announced today will not only provide detailed information to guide ultimate mining of the Tony M resource, by potentially upgrading mineral resources into the indicated category and allowing us to evaluate the conditions of the extensive underground workings, but, if successful, could add meaningful value to the deposit through the possible addition of vanadium resources not previously evaluated."

Tony M - along with the Daneros and Rim mines - were part of a portfolio of permitted, past-producing conventional uranium and vanadium mines in Utah and Colorado which Consolidated Uranium acquired from Energy Fuels Inc in 2021. The company has an agreement with Energy Fuels for the toll-milling of uranium mined from the projects at Energy Fuels' White Mesa mill, which is the only currently permitted and operating conventional uranium mill in the USA.

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 14 juil. 2023, 11:37

Christensen Ranch project ready for restart

13 July 2023

US uranium mining company Uranium Energy Corp (UEC) announced its plan to accelerate the steps required for a resumption of operations has been completed, enabling a faster restart at the Christensen Ranch in-situ leach (ISL) project in Wyoming.

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Christensen Ranch Mine Unit 10, showing wells and two module buildings (Image: UEC)

UEC acquired Uranium One Americas Inc (U1A) from Russian state nuclear corporation Rosatom in December 2021. U1A's assets included the production-ready Christensen Ranch ISL project and associated orebodies, which together with the Irigaray central processing plant (CPP), form the Willow Creek uranium mine and have been under care-and-maintenance since 2018.

"The repatriation of the assets to US ownership has been a transformative acquisition for UEC, positioning the company as the largest, fully permitted, low-cost ISL project resource base of any US-based producer," UEC said.

Since its acquisition of the U1A assets, "key production infrastructure, including its wellfields and the satellite ion exchange plant, have been maintained, and now upgraded and refurbished to facilitate a fast restart", UEC said. "Uranium recovered from Christensen Ranch will be processed at UEC's Irigaray CPP."

The Irigaray CPP is the centerpiece of UEC's Wyoming hub-and-spoke project. The plant was originally constructed by Westinghouse and was later expanded by U1A in 2010, adding two resin elution circuits and additional precipitation capacity. The Irigaray CPP is one of the largest uranium CPPs in the USA, licensed for 2.5 million pounds of uranium production per year with pending plans to increase the licensed capacity to 4 million pounds per year.

The first project to feed the Irigaray CPP will be the Christensen Ranch project. UEC has been working steadily at Christensen Ranch since the beginning of this year to move out of care and maintenance and advance towards resuming production. The company has already conducted a series of operational tests in the mine units at the project.

UEC also announced the installation of a new wellfield at Christensen Ranch. The drilling and well installation programme for 180 recovery and injection wells is planned to commence in August this year. "Although not required for initial startup, these new wellfield modules will be installed and available for ramp up to meet production requirements," the company noted.

"With demand increasing for uranium supply from stable geopolitical jurisdictions and US national security objectives, we foresee an increasingly urgent need for domestic uranium supply," said UEC President and CEO Amir Adnani. "The fundamental drivers of supply and demand, including pending legislation to ban Russian uranium imports to the United States, are translating into rising uranium prices that have accelerated UEC's production readiness programme. In that regard, we have been working towards restarting production to fulfill the need for domestic uranium."

In April 2022, UEC disclosed mineral resources totalling over 69 million pounds U3O8 (26,541 tU) in the first technical filing for its Wyoming hub-and-spoke uranium ISL project. The project consists of the Irigaray, Christensen Ranch, Moore Ranch, Reno Creek, Ludeman, Allemand-Ross, Barge and the Jab/West Jab project areas. Total measured and indicated resources across all the assets total 61,956,200 pounds U3O8, with total inferred resources of 7,105,700 pounds U3O8.
https://www.world-nuclear-news.org/Arti ... or-restart

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 22 juil. 2023, 13:42

suite de ce post du 9 avril 2023 viewtopic.php?p=2366962#p2366962

aprés Vogtle3, au tour de Vogtle4 quasi prét.
Georgia Power takes next step for Vogtle 4

21 July 2023

Georgia Power says that all 364 inspections, tests and analyses have been performed and all acceptance criteria, known as ITAACs, have been met on Vogtle unit 4 and the documentation submitted to the US Nuclear Regulatory Commission (NRC).

Image
Vogtle 3 and 4 (Image: Georgia Power)

.......................
https://www.world-nuclear-news.org/Arti ... r-Vogtle-4

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 31 juil. 2023, 23:20

suite de ce post du 9 avril 2023 viewtopic.php?p=2366962#p2366962

Vogtle3 entre en service commercial
USA: un réacteur nucléaire mis en service, une première depuis 7 ans

AFPle 31 juill. 2023

Un réacteur d'une centrale nucléaire de Géorgie, dans le Sud-Est des États-Unis, a été mis en service lundi, une première depuis sept ans dans ce pays qui ne compte désormais plus aucun projet de réacteur classique, ceux-ci laissant la place aux petits réacteurs.

L'unité 3 du site Vogtle, situé près de Waynesboro, dans l'est de la Géorgie, a été raccordée au réseau électrique et pourra couvrir les besoins d'environ 500.000 particuliers et entreprises, selon un communiqué publié lundi par la compagnie Georgia Power.

La mise en service survient sept ans après la date de livraison initialement envisagée.

Quant au coût de réalisation des unités 3 et 4, cette dernière attendue fin 2023; voire début 2024, il atteint plus de 30 milliards de dollars, selon une estimation de la Municipal Electric Authority of Georgia (MEAP).

C'est plus du double du budget annoncé au lancement du projet, soit 14 milliards de dollars.

Les dépassements de coûts ont poussé au dépôt de bilan, en 2017, le géant du nucléaire Westinghouse, filiale du japonais Toshiba, qui s'est désengagé du dossier Vogtle.

Une fois l'unité 4 en service, Vogtle sera la centrale la plus puissante des États-Unis.

Les unités 3 et 4 de Vogtle étaient les premiers projets de nouveaux réacteurs approuvés par les autorités américaines depuis 1979 et l'incident de la centrale de Three Mile Island (Pennsylvanie), le plus sérieux de l'histoire du nucléaire aux États-Unis.

La dernière unité mise en service avant l'unité 3 de Vogtle était l'unité 2 de la centrale de Watts Bar, dans le Tennessee, en 2016.

Mais il s'agissait d'un réacteur dont la construction avait débuté en 1973, avant que les travaux ne soient suspendus durant plus deux décennies, puis poursuivis.

Depuis 1990, seuls trois réacteurs ont été mis en service aux États-Unis: les deux unités de Watts Bar en 1996 et 2016, et l'unité 3 de Vogtle, lundi.

Aucun autre projet de réacteur conventionnel n'est actuellement en cours de réalisation.

La construction des unités 2 et 3 de la centrale Virgil Summer, en Caroline du Sud, a été abandonnée en 2017, bien que neuf milliards de dollars aient déjà été investis.

Les industriels se sont désormais réorientés vers les petits réacteurs de nouvelle génération, appelés SMR (small modular reactors).

Ces modèles, dont aucun n'a encore été mis en service, sont censés être moins coûteux, moins longs à construire et considérés comme plus sûrs que des centrales conventionnelles.
https://www.connaissancedesenergies.org ... ans-230731

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Re: [Nucléaire] Relance du nucléaire aux USA.... ou pas ?

Message par energy_isere » 08 août 2023, 09:33

Joe Biden va mettre un coup de frein mardi à l'exploitation d'uranium dans une vaste zone autour du Grand Canyon, la première annonce d'un voyage à l'ouest des Etats-Unis destiné à convaincre les Américains, guère enthousiastes, des bienfaits de sa politique climat.

Cette zone, qui aura le statut de "monument national", sera d'une superficie de plus de 400.000 hectares, a annoncé Ali Zaidi, conseiller climat du démocrate de 80 ans, dans l'avion qui emmenait lundi ce dernier en Arizona.

Des tribus indiennes locales réclamaient depuis un certain temps cette décision pour freiner l'activité minière autour de cette merveille naturelle qu'est le Grand Canyon.

Ce statut interdira de lancer sur le site de nouveaux projets d'extraction d'uranium, sans toucher aux droits d'exploitation déjà existants, a encore indiqué Ali Zaidi. La création de cette nouvelle zone protégée est à la fois un hommage à la "vibrante histoire" de ces tribus, et la protection d'un "écosystème incroyablement important", autour du fleuve Colorado.
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https://www.boursorama.com/actualite-ec ... c3c8b6b017

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