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Stephanie Safdie - Greenly

Stephanie completed a bachelor's degree in English & Multimedia in 2020 at the University of Maryland College Park. She previously worked as a social media content video creator and freelance copywriter. After seeking opportunities to put her various creative passions to good use, she joined Greenly in mid 2022 as SEO copywriter for the U.S. blog to provide her American perspective on the climate change issues we face today. 

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Kara joined the team at Greenly in 2023 as SEO copywriter for the UK market.

Kara Anderson - Greenly

Kara studied her bachelors of law at the University of Glasgow and her masters in international law at the University of Aberdeen, before looking for a more creative career path. She found this in advertising, working as a content manager in London. After a move to Paris in 2019 she decided to switch to freelance copywriting in order to scratch her creative itch. Kara joined the team at Greenly in 2023 as SEO copywriter for the UK market.  

Ines Gendre

After graduating in 2016 with a master’s degree in marketing, Ines began her career in project management. However she soon decided to turn towards writing, to bring her core competencies to the service of societal changes. First working as a freelance copywriter, she joined Greenly in early 2022 to help fight global warming.

Alexis Normand

Alexis is a 37 year-old graduate of HEC and Sciences-Po. After his studies, he spent 2 years working in public policy consulting. He then spent 6 years at Withings, a leading company in connected objects. While there, he continued the companies operations in Boston, USA, and created the company’s health department. After the company was bought by Nokia, he joined the startup Embleema by working through Techstars, one of the best startup incubators in the United States, where he developed a taste for entrepreneurship. His return to France was an opportunity to put all his experience at the service of the environment, during a crucial moment in the climate crisis.

Arnaud Delubac

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Matthieu Vegreville

Matthieu is a 28 year-old graduate engineer from Ecole Polytechnique and Télecom Paris, with a background in data science at Withings. While there, he worked on watch activity detection algorithms, and developed a health study activity so that connected objects could be used to better monitor certain pathologies. He has long been involved in data science projects with his brother, who has the same training. Faced with the urgency of the climate crisis, he decided to put his know-how at the service of the environment. 

Justine Dumont

Justine a toujours été passionnée de lecture et d’écriture. En 2019, elle parvient justement à faire de sa passion son métier, en devenant rédactrice web indépendante. Motivée par ses engagements écologiques, elle rejoint l’équipe de Greenly en 2022 afin de mettre ses compétences au service de la cause environnementale. 

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What is a European Pressurized Reactor (EPR)?

What is a European Pressurized Reactor? How does a European Pressurized Reactor differ from other nuclear reactors?

<p id="">Nuclear energy has been a divisive topic since it became a feasible energy source. Still, countries and companies globally have continued to invest in the future of this technology. European pressurized reactors belong to one of the newer generations of nuclear reactors that promised to improve safety and power generation. &nbsp;</p><blockquote id="">👉 But European pressurized reactors have their flaws. What are these flaws? And what is a European pressurized reactor in the first place?</blockquote><p id="">‍</p><p id=""> </p><p id=""> </p><p id=""> </p><figure id="" class="w-richtext-figure-type-image w-richtext-align-center" data-rt-type="image" data-rt-align="center"><div id=""><img src="https://uploads-ssl.webflow.com/6232f79b68d15d3d9b69c096/635e9793817f393d425a140f_what-is-a-european-pressurized-reactor-epr.jpg" loading="lazy" id="" width="auto" height="auto"></div></figure><p id="">‍</p><h2 id="">What is a European pressurized reactor (EPR)? </h2><p id=""><strong id="">A European pressurized reactor (EPR) is a type of nuclear reactor that is a third-generation pressurized water reactor.</strong> Nuclear reactors, generally, create electricity by harnessing nuclear power. &nbsp;</p><p id="">Below, we define these terms piece-by-piece to give a clearer picture of what an EPR is. </p><p id="">‍</p><p id=""> </p><h3 id="">What is nuclear power? </h3><blockquote id="">👉 Nuclear power works by converting water into steam by way of heat created through nuclear fission – splitting atoms in half to create energy. A nuclear reactor is a controlled space for nuclear fission to occur. </blockquote><p id="">‍</p><p id=""> </p><h3 id="">What is a pressurized water reactor? </h3><p id="">A pressurized water reactor heats pressurized normal water in thin coils. <strong id="">This super-hot pressurized water then interacts with lower pressure water that creates steam to power turbines. &nbsp;</strong></p><p id="">Normal water, also called light water, is differentiated from heavy water. In older generations of nuclear reactors, light water was slightly altered to include a heavier hydrogen isotope. This new compound was named “heavy water.” </p><p id="">It has slightly different properties compared to light water, contributing greatly to how engineers could use the two liquids differently. &nbsp;</p><p id="">‍</p><p id=""> </p><h2 id="">What is a third-generation nuclear reactor? </h2><p id="">As nuclear reactors are developed and improved, eventually there comes a point when a set of reactors are markedly different from those previous. This necessitates the naming of the next generation. &nbsp;Although the changes from the second to the third generation of reactors were marginal, they were still notable. </p><blockquote id="">👉 Each generation is known to be safer, more reliable, and more cost-effective than the last. The third generation of nuclear reactors, in particular, upgraded many sides of safety and had greater standardization of design. </blockquote><p id="">‍</p><p id=""> </p><h3 id="">Naming clarification </h3><p id="">It is worth noting that a European pressurized reactor is also known as an evolutionary power reactor outside of Europe. Regardless, an “EPR” is an acceptable name everywhere. </p><p id="">‍</p><p id=""> </p><h3 id="">The first EPRs in use </h3><p id="">The first EPR in operation was Taishan 1, located in China. It began contributing power to its grid in December 2018. The second fully functioning EPR was Taishan 2, also located in China, opening a year later. </p><p id="">‍</p><p id=""> </p><p id=""> </p><figure id="" class="w-richtext-figure-type-image w-richtext-align-center" data-rt-type="image" data-rt-align="center" data-rt-max-width=""><div id=""><img src="https://uploads-ssl.webflow.com/6232f79b68d15d3d9b69c096/635e981f774c9510d99d237b_what-is-a-european-pressurized-reactor-epr.jpg" loading="lazy" id="" width="auto" height="auto"></div></figure><p id="">‍</p><h2 id="">Standout characteristics of EPRs </h2><h3 id="">Safety features </h3><p id="">As mentioned above, <strong id="">third generation nuclear reactors are much safer than their predecessors</strong>. EPRs are no exception to this rule. &nbsp;</p><p id="">They were designed with four stand-alone emergency cooling systems that can continue to cooling the reactors for up to three years after shutdown. &nbsp;</p><p id="">To avoid a repeat of Chernobyl, EPRs are completely leak-proof around the reactor. They also have a spare container and cooling area on the off chance that nuclear parts could escape the reactor. &nbsp;</p><p id="">‍</p><p id=""> </p><h3 id="">Power potential, efficiency, and defense </h3><p id="">Based on estimations by their inventors, EPRs need about 17% less fuel than their predecessors did. <strong id="">On top of that, compared to the most modern reactors, EPRs are more powerful, with 14% higher power output capacity. &nbsp;</strong></p><p id="">The walls of the EPRs are two concrete layers that total to over eight feet thick. They were designed like so to deal with worst-case scenarios: an internal meltdown or an impact from an airplane. </p><p id="">‍</p><p id=""> </p><p id=""> </p><h2 id="">EPR problems </h2><h3 id="">European pressurized reactor inflexibility </h3><blockquote id="">👉 EPR was a technology designed with different power requirements in mind than our world currently faces today. With wind and solar power making up a large part of the modern energy grid, there are larger variations in energy at any given moment depending on the state of natural resources. &nbsp;</blockquote><p id="">For example, a location that relies on solar panels and wind turbines for much of its energy is dependent on the weather for a consistent power supply. A windier, sunnier day will result in much more power flooding the grid than would a dark, still day. &nbsp;</p><p id=""><strong id="">Energy systems work best when they can fluctuate between sources depending on what resource is in abundance. Unfortunately, EPRs do not fit well into this equation. </strong></p><p id="">EPRs are very large reactors that are rather inflexible – they have a hard time suddenly shutting off or starting up based on potential sudden fluxes in wind and solar energy. Having a large amount of potential power is less useful If that power cannot fit well onto the grid. </p><p id="">‍</p><p id=""> </p><figure id="" class="w-richtext-figure-type-image w-richtext-align-center" data-rt-type="image" data-rt-align="center" data-rt-max-width=""><div id=""><img src="https://uploads-ssl.webflow.com/6232f79b68d15d3d9b69c096/635e98824710ee18c3fe6d97_what-is-a-european-pressurized-reactor-epr.jpg" loading="lazy" id="" width="auto" height="auto"></div></figure><p id="">‍</p><h3 id="">Overspending and delays </h3><p id="">It is not uncommon for an EPR to see delays in its opening and to need extra money spent to get it functioning. </p><p id="">For example, an EPR unit at Flamanville in Normandy, France, that was supposed to need six years from construction start to commercial operation to 13 years and then again to 17 years. This delay inflated the cost of the Flamanville EPR from 3.3 billion euros (3.3 billion U.S. dollars) to 12.4 billion euros (12.3 billion U.S. dollars). &nbsp;</p><blockquote id="">👉 The Flamanville EPR was the second EPR to begin construction. The first EPR to begin construction is on the verge of being commercially operable, but after it faced its own 13-year delay. This EPR is at Oikiluoto in Finland. &nbsp;</blockquote><p id="">Some of the issues have to do with corrosion problems that are common in pressurized water reactors like EPRs. The corrosion can create safety concerns as well as clogging of steam generator tubes. As When an EPR begins to come online, it may need its water circuits replaced before it can be in commercial operation. </p><p id="">‍</p><p id=""> </p><p id=""> </p><h2 id="">Other concerns and facts about nuclear energy </h2><h3 id="">Can a nuclear reactor explode? </h3><p id="">It is not possible for a nuclear reactor to explode. This is because nuclear explosions require an unbelievable amount of compact force that is not used at nuclear reactor sites. Without this force, there will not be an uncontrollable chain reaction of energy. </p><p id="">‍</p><p id=""> </p><h3 id="">Nuclear not as clean as it seems </h3><p id=""><a href="https://www.greenly.earth/blog-en/is-nuclear-energy-clean-answers-and-explanations" id="">Nuclear energy is often touted as a clean energy source. In reality, while nuclear is not as bad for the environment as fossil fuels, it is still responsible for plenty of greenhouse gas emissions.</a> </p><p id="">Mining is a required part of the nuclear energy life cycle in order to secure uranium supplies. As an industry, mining relies on massive construction vehicles that gobble fossil fuels. </p><p id="">One of the greenhouse gases that doesn’t get much attention is water vapor.<a href="https://www.greenly.earth/blog-en/what-is-the-greenhouse-effect#:~:text=%F0%9F%91%89%20The%20definition%20of%20the,to%20space%2C%20warming%20the%20earth." id=""> While not as potent as carbon dioxide or methane, water vapor still contributes to the greenhouse effect.</a> Nuclear plants emit water vapor as a natural by-product of their operations. &nbsp;</p><p id="">‍</p><p id=""> </p><h3 id="">Nuclear waste </h3><p id=""><strong id="">An unavoidable part of the process in creating nuclear energy is the creation of nuclear waste.</strong> While governments may try to assure us that the radioactive fuel rods used by a reactor will not escape the nuclear site, it is worth noting that nuclear waste can take up thousands of years to decay completely. </p><p id="">Also, more operational nuclear plants mean a greater risk of a radioactive leak at some point in the future, however slim. &nbsp;</p><p id=""> </p><p id="">‍</p><h3 id="">Where are nuclear reactors located? </h3><blockquote id="">👉 The country with the most nuclear reactors is the United States with 96, followed by France and China. &nbsp;</blockquote><p id="">Within the U.S., 20 states have one or more commercial nuclear plants. Illinois has the most reactors of any state at 11. In fact, the majority of nuclear reactors found on American soil are east of the Mississippi. &nbsp;</p><p id="">If you are concerned about if there is a nuclear reactor near you,<a href="https://www.nrc.gov/reactors/operating/map-power-reactors.html" id=""> this map shows locations of all U.S. nuclear sites as of 2021.</a> &nbsp;</p><p id="">‍</p><p id=""> </p><h3 id="">Safest nuclear reactor design </h3><p id="">Generally speaking, the safest nuclear reactors will be the ones designed most recently. Those are typically known as fourth generation nuclear reactors. &nbsp;</p><p id="">There are other nuclear technologies in testing for feasibility and safety, but it is unclear if these potential breakthroughs will be safer than current designs. &nbsp;</p><p id="">‍</p><p id=""> </p><h2 id="">Next generation of nuclear &nbsp;</h2><p id="">For nuclear energy to be a reliable source of energy in years to come, it needs to be a more flexible power source that can ride the highs and lows of energy produced from natural resources. </p><p id="">‍<strong id="">One of the faults of EPRs, as discussed, is that they cannot turn on or off quickly enough to work well in tandem with wind and solar. </strong></p><p id="">It is likely that the future of nuclear power lies with more agile technologies that use much smaller reactors. These modular reactors will require less energy to start and stop their processes. They will also be cheaper and faster to build due to a greater standardization of parts. </p><p id="">‍</p><p id=""> </p><h2 id="">Contact Greenly to get a read on your emissions </h2><p id="">With the world transitioning to cleaner energy sources, it’s important to know the emissions of your business. You can hire<a href="https://www.greenly.earth/en-us" id=""> Greenly</a> to measure your emissions and give you a full report on how to reduce them. And for the emissions that you can’t avoid, we can set you up with a host of verified carbon offset programs for you to choose from. &nbsp;</p><p id="">‍</p><p>‍</p><p id=""><strong id="">🚀 If you enjoyed reading this article, here are a few more :</strong></p><ul id=""><li id=""><a href="https://www.greenly.earth/blog-en/why-is-the-colorado-river-threatened-by-a-water-crisis" id="">Why is the Colorado River Threatened by a Water Crisis?</a></li><li id=""><a href="https://www.greenly.earth/blog-en/us-wildfires-destroy-carbon-offsets" id="">US Wildfires Destroy Carbon Offsets</a></li><li id=""><a href="https://www.greenly.earth/blog-en/reforestation-our-guide-to-sustainable-companies" id="">Reforestation: Our Guide to Sustainable Companies</a></li><li id=""><a href="https://www.greenly.earth/blog-en/how-to-implement-a-csr-approach-in-your-company" id="">How to implement a CSR approach in your company</a></li><li id=""><a href="https://www.greenly.earth/blog-en/all-you-need-to-know-about-fast-fashion" id="">All You Need to Know About Fast Fashion</a></li></ul><p>‍</p>

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