Nucleare, il suo impatto sull’ambiente quasi uguale al carbone

di Marco Mancini 46

Alcuni “amici” del nucleare stanno tentando negli ultimi anni di inserire questa risorsa energetica tra quelle considerate “pulite”. Il motivo è che non avendo emissioni di CO2, si dice che per ridurre l’inquinamento bisogna puntare anche su tale fonte in quanto se petrolio, carbone e gas emettono quantità variabili di anidride carbonica, il nucleare non lo fa. Ma è questa l’unica forma di inquinamento? Ovviamente no, ma questo i nuclearisti non lo sanno o fanno finta di non saperlo.

A parte l’eventualità di una catastrofe nucleare che, come ci insegnano Chernobyl e Fukushima, non ha eguali in quanto a disastri, il vero impatto importante il nucleare lo ha sulle riserve idriche. Per far funzionare un’impianto c’è bisogno di un sistema di raffreddamento che impiega quantità stratosferiche di acqua, e non per altro le centrali sono costruite sempre vicino a fiumi, laghi o mari. Ma c’è di più. Secondo il rapporto del Network River l’impiego di acqua per il funzionamento di una centrale nucleare può avere effetti devastanti, in particolar modo in un periodo di boom demografico quando la popolazione mondiale ha sempre più bisogno di acqua dolce.

Molta dell’acqua infatti viene sprecata per far funzionare questi enormi colossi, e come dimostra il grafico qui sopra, l’impatto di una centrale è quasi uguale a quello di una a carbone. Sull’asse orizzontale c’è l’acqua consumata, basata sul ciclo di vita della produzione di un megawattora di energia elettrica da ciascuna sorgente. Quindi, non è solo quanto viene consumato per produrre l’elettricità, ma nel caso dell’energia eolica o solare anche per realizzare la tecnologia, o nel caso del carbone la fase di estrazione.

Dunque cosa ci dicono i dati? Che la produzione di un MWh (Megawatt/ora) tramite il carbone impiega circa 60.800 litri di acqua e ne consuma 2.600; le centrali nucleari impiegano oltre 56 mila litri di acqua e ne consumano 2.100. Per renderci conto stiamo parlando di numeri che dicono che una centrale nucleare mediamente consuma più acqua di tutta quella che consumano i cittadini della città in cui essa si trova. Messo così, sembra che il nucleare convenga rispetto al carbone. Ma rispetto alle rinnovabili non c’è partita. Per produrre la stessa quantità di energia il solare termico ha bisogno di circa quattromila litri di acqua e ne consuma la metà, numeri simili per il geotermico mentre per fotovoltaico ed eolico i numeri sono vicini allo zero. Cifre da ricordare la prossima volta che qualcuno dice che una centrale nucleare non ha impatto sull’ambiente.

[Fonte: Treehugger]

Photo Credits | Getty Images

Commenti (46)

  1. Ma siete ridicoli…
    nn è che la bevono l’acqua…la prendono la riscaldano un pò e la rilasciano..
    voi v bevete l’acqua del mare, del fiume o del lago??

    Xke nn dite che x ogni MWh produce più CO2 il fotovoltaico del nucleare..??

  2. Parli di consumi come se l’acqua viene disintegrata… l’acqua viene reimmessa nel fiume… quale sarebbe il problema?
    Una centrale prende a monte l’acqua dal fiume… la si scalda per far girare le turbine, la si raffredda attraverso le torri di condenzazione e per finire reimmessa nel fiume… per 2 metri cubi di acqua cioè 2.000 litri su 56.000 ci sta che evaporini… tanto tornano sotto forma di pioggia.

  3. L’ha scritto un bambino delle elementari?

  4. I simply want to mention I am beginner to blogging and certainly enjoyed you’re website. Almost certainly I’m likely to bookmark your blog . You amazingly have amazing well written articles. Bless you for revealing your webpage.

  5. Zune and iPod: Most people compare the Zune to the Touch, but after seeing how slim and surprisingly small and light it is, I consider it to be a rather unique hybrid that combines qualities of both the Touch and the Nano. It’s very colorful and lovely OLED screen is slightly smaller than the touch screen, but the player itself feels quite a bit smaller and lighter. It weighs about 2/3 as much, and is noticeably smaller in width and height, while being just a hair thicker.

  6. Straight to the point and well written! Why can’t everyone else be like this?

    http://partscatalog.sellload.com/

  7. Valuable information. Fortunate me I found your web site unintentionally, and I am shocked why this twist of fate didn’t came about earlier! I bookmarked it.

  8. A lot of thanks for your entire labor on this blog. My mom really likes managing investigation and it is obvious why. Most people learn all relating to the dynamic way you produce functional secrets via this web blog and even improve contribution from visitors about this point so our favorite princess has always been starting to learn a lot. Take pleasure in the rest of the new year. You’re the one carrying out a stunning job.

  9. I would like to thnkx for the efforts you have put in writing this web site. I’m hoping the same high-grade website post from you in the upcoming as well. Actually your creative writing skills has inspired me to get my own web site now. Really the blogging is spreading its wings fast. Your write up is a good example of it.

  10. I appreciate, lead to I discovered exactly what I used to be taking a look for. You’ve ended my four day lengthy hunt! God Bless you man. Have a nice day. Bye

  11. Thanks for the sensible critique. Me & my neighbor were just preparing to do some research on this. We got a grab a book from our local library but I think I learned more clear from this post. I’m very glad to see such excellent info being shared freely out there.

  12. you’re in reality a just right webmaster. The web site loading speed is incredible. It seems that you are doing any unique trick. In addition, The contents are masterwork. you have done a magnificent activity in this subject!

  13. Exceedingly interesting knowledge you’ll have said, thanks so much for adding.

    http://www.shortmyurls.com/emeryeps-grenadines-seo-comment

  14. I gotta bookmark this web site it seems invaluable very helpful

  15. I do not even know how I ended up here, but I thought this post was great. I don’t know who you are but definitely you are going to a famous blogger if you aren’t already 😉 Cheers!

  16. Its like you read my mind! You appear to know a lot about this, like you wrote the book in it or something. I think that you could do with some pics to drive the message home a bit, but instead of that, this is wonderful blog. A great read. I will certainly be back.

  17. I’ve recently started a web site, the info you offer on this web site has helped me greatly. Thank you for all of your time & work. “One of the greatest pains to human nature is the pain of a new idea.” by Walter Bagehot.

  18. IMSC SEO is a Singapore SEO Company. They provide comprehensive Singapore SEO services to help SG businesses to gain traffic from search engine. Their SEO agency has many years of experiences working with overseas companies on more competitive grounds. They are the best seo company in Singapore you can find. Their SEO expert and consultant understand exactly what search engine optimization your company need to gain search engine traffic.

    http://www.shortmyurls.com/imsc-home-comment-general

  19. As soon as I noticed this internet site I went on reddit to share some of the love with them.

  20. Divorcemind.com is a online divorce resource for divorce attorney, attornies and lawyers. You will find the best divorce information online. Divorce Mind will make your divorce or separation a quick, convenient and private.

    http://www.shortmyurls.com/divorcemind-divorces-comment

  21. Divorcemind.com is a online divorce resource for divorce attorney, attornies and lawyers. You will find the best divorce information online. Divorce Mind will make your divorce or separation a quick, convenient and private.

    http://www.shortmyurls.com/divorcemind-divorce-attorney-comment-gen

  22. SacramentoCremation.us is one of the leading crematorium services in the Sacramento area. Feel free to contact us regarding any questions on Sacramento Cremation Services or concerns you might have. Our staff will respond to you as soon as possible.

    http://www.shortmyurls.com/sacramentocremation-comment-general

  23. The new Zune browser is surprisingly good, but not as good as the iPod’s. It works well, but isn’t as fast as Safari, and has a clunkier interface. If you occasionally plan on using the web browser that’s not an issue, but if you’re planning to browse the web alot from your PMP then the iPod’s larger screen and better browser may be important.

  24. The Zune concentrates on being a Portable Media Player. Not a web browser. Not a game machine. Maybe in the future it’ll do even better in those areas, but for now it’s a fantastic way to organize and listen to your music and videos, and is without peer in that regard. The iPod’s strengths are its web browsing and apps. If those sound more compelling, perhaps it is your best choice.

  25. IMSC SEO is a Singapore SEO Company. They provide comprehensive Singapore SEO services to help SG businesses to gain traffic from search engine. Their SEO agency has many years of experiences working with overseas companies on more competitive grounds. They are the best seo company in Singapore you can find. Their SEO expert and consultant understand exactly what search engine optimization your company need to gain search engine traffic.

    http://www.shortmyurls.com/imsc-home-comment-general

  26. IMSC SEO is a Singapore SEO Company. They provide comprehensive Singapore SEO services to help SG businesses to gain traffic from search engine. Their SEO agency has many years of experiences working with overseas companies on more competitive grounds. They are the best seo company in Singapore you can find. Their SEO expert and consultant understand exactly what search engine optimization your company need to gain search engine traffic.

    http://www.shortmyurls.com/imsc-services-comment-exact

  27. Remarkably useful elements you have stated, say thanks a lot for writing.

    http://www.sxdtzn.com

  28. wonderful put up, very informative. I’m wondering why the opposite experts of this sector don’t realize this. You must continue your writing. I’m confident, you have a huge readers’ base already!

  29. I’m very pleased to discover this site. I need to to thank you for ones time for this fantastic read!! I definitely really liked every bit of it and i also have you book marked to check out new information on your web site.

    http://www.lopezfoundation.org

  30. I was excited to find this site. I need to to thank you for your time for this particularly wonderful read!! I definitely enjoyed every little bit of it and I have you book-marked to look at new stuff in your web site.

    http://www.lopezfoundation.org

  31. Greetings here, just got aware of your blogging site through Bing and yahoo, and realized that it’s seriously helpful. I will be grateful if you decide to carry on such.

    http://www.divorcelawyer5.info

  32. I merely need to tell you that I am new to posting and certainly valued your website. Most likely I am likely to store your blog post . You absolutely have fabulous article materials. Value it for telling with us the best site page

    http://www.seohero4.info

  33. Between me and my husband we’ve owned more MP3 players over the years than I can count, including Sansas, iRivers, iPods (classic & touch), the Ibiza Rhapsody, etc. But, the last few years I’ve settled down to one line of players. Why? Because I was happy to discover how well-designed and fun to use the underappreciated (and widely mocked) Zunes are.

  34. Fairly useful data that you have remarked, warm regards for posting.

    http://www.helpor.net

  35. Good day there, just started to be aware of your article through Yahoo and bing, and found that it’s pretty beneficial. I will be grateful if you continue on such.

    http://www.divorceattorney6.info

  36. Might be mostly extremely difficult to encounter well-updated women and men on this content, however you seem like you comprehend the things that you’re writing about! Excellent

    http://www.mensbroad.us

  37. I would like to thank you for the efforts you have put in writing this blog. I am hoping the same high-grade website post from you in the upcoming as well. In fact your creative writing skills has inspired me to get my own website now. Really the blogging is spreading its wings fast. Your write up is a great example of it.

  38. Useful info. Fortunate me I discovered your website accidentally, and I’m surprised why this coincidence didn’t happened earlier! I bookmarked it.

  39. magnificent publish, very informative. I’m wondering why the other experts of this sector do not understand this. You should proceed your writing. I’m confident, you have a huge readers’ base already!

  40. I was more than happy to find this site. I wanted to thank you for ones time for this particularly fantastic read!! I definitely liked every part of it and i also have you saved as a favorite to look at new stuff in your web site.

    http://www.biciraq.org

  41. Remarkably interesting knowledge that you have said, thanks a lot for setting up.

    http://www.cjisst.org

  42. Good day here, just turned familiar with your post through Yahoo and bing, and have found that it is pretty informational. I’ll appreciate should you decide persist this.

    http://moonlightcreationsjewelry.com

  43. I just intend to share it with you that I am new to blogging and pretty much adored your write-up. Probably I am inclined to save your blog post . You definitely have great article content. Truly Appreciate it for expressing with us your favorite internet report

    http://www.seoservices1.info

  44. Hello there, I found your blog by the use of Google while looking for a similar matter, your site got here up, it seems to be great. I’ve bookmarked it in my google bookmarks.

  45. I have been wanting to start an online business for a while and have done a lot of research about the various types of opportunities. You are absolutely right about the number of scams out there! I’ve finally come to an honest website just when I was about to give up. I realize that nothing worth having comes easy and I am prepared to work hard to develop a business I can be proud of:)

    http://www.blueprintonsite.com

  46. I do consider all of the ideas you have offered to your post. They’re very convincing and will certainly work. Nonetheless, the posts are very short for beginners. May just you please extend them a bit from next time? Thanks for the post.

    http://yjbs.info/

Lascia un commento

Il tuo indirizzo email non verrà pubblicato.

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>

Questo sito usa Akismet per ridurre lo spam. Scopri come i tuoi dati vengono elaborati.