4 ms·

http://www.assemblee-nationale.fr/15/pdf/rap-enq/r2195-t1.pdf http://www.assemblee-nationale.fr/15/pdf/rap-enq/r2195-t1.pd... "Lors de leur audition précitée,

http://www.assemblee-nationale.fr/15/pdf/rap-enq/r2195-t1.pdf http://www.assemblee-nationale.fr/15/pdf/rap-enq/r2195-t1.pd... "Lors de leur audition précitée, les représentants du BRGM ont indiqué que pour remplacer un réacteur nucléaire de 1 GW fonctionnant avec un facteur de charge de 75 %, il faudrait recouvrir 5200hectares de panneaux photovoltaïques, soit la moitié de la surface de Paris." Replacing a 1GW nuclear reactor (a power plan can have 2, 3 or 4) with a capacity factor of 75% will need 5200h of solar panels, half of Paris surface. This doesn't also solve the transport and storage issues to handle the intermittence. After that you simply have to do the maths. Knowing that solar panels are loosing efficiency over time and needs to be replaced after 20 years. Nuclear power plants are currently holding after 70 years.

iso1631 7y ago
5200h is 52km2 France is 551,695 km2 So 1/10,000th of france would be needed for 1GW A 1GW reactor produces 9 billion kwh a year France's entire electric requirement is 450 billion, so needs about 50GW, or 0.5% of France's surface area. Based on those figures, space isn't a problem.
- wnkrshm 7y ago
  If you draw a 50x50km square on a map of France, you'll quickly realize that's an area the size of Luxembourg - not exactly negligible.
  - kragen 7y ago
    A 50×50 km square would be 2500 km². We're talking about 52 km², which is a 7.2 km × 7.2 km square. Shitty dimensional analysis strikes again!
    - wnkrshm 7y ago
      > A 50×50 km square would be 2500 km². We're talking about 52 km², which is a 7.2 km × 7.2 km square. Shitty dimensional analysis strikes again! According to the parent poster, those 52 km² are needed for 1GW. France needs around 50GW, 50 times more power and area, ergo 2500 km².
      - kragen 7y ago
        Oh, I see. Thank you for clarifying.
        fifnir 7y ago
        The US would need about 50x500km !
  - deleted 7y ago
    [deleted]
  - iso1631 7y ago
    Pretty much. How much is used by vinyards? Or farms? It's the yellow dots here https://imgur.com/418BI6Q https://imgur.com/418BI6Q France has about 1 million km of roads [1], lets assume at least 2m wide. That's 2,000 sq km. How many of these roads can you see on this picture https://imgur.com/FCyt4O6 https://imgur.com/FCyt4O6 [1] https://en.wikipedia.org/wiki/List_of_countries_by_road_network_size https://en.wikipedia.org/wiki/List_of_countries_by_road_netw...
- hokkos 7y ago
  It is becoming very hard to install news wind onshore in France, people are revolting against wind turbine because it decrease real estate price and are found ugly and noisy, and it is happening at a way lower penetration rate than Germany.

iso1631 7y ago

5200h is 52km2 France is 551,695 km2 So 1/10,000th of france would be needed for 1GW A 1GW reactor produces 9 billion kwh a year France's entire electric requirement is 450 billion, so needs about 50GW, or 0.5% of France's surface area. Based on those figures, space isn't a problem.

wnkrshm 7y ago
If you draw a 50x50km square on a map of France, you'll quickly realize that's an area the size of Luxembourg - not exactly negligible.
- kragen 7y ago
  A 50×50 km square would be 2500 km². We're talking about 52 km², which is a 7.2 km × 7.2 km square. Shitty dimensional analysis strikes again!
  - wnkrshm 7y ago
    > A 50×50 km square would be 2500 km². We're talking about 52 km², which is a 7.2 km × 7.2 km square. Shitty dimensional analysis strikes again! According to the parent poster, those 52 km² are needed for 1GW. France needs around 50GW, 50 times more power and area, ergo 2500 km².
    - kragen 7y ago
      Oh, I see. Thank you for clarifying.
      - fifnir 7y ago
        The US would need about 50x500km !
- deleted 7y ago
  [deleted]
- iso1631 7y ago
  Pretty much. How much is used by vinyards? Or farms? It's the yellow dots here https://imgur.com/418BI6Q https://imgur.com/418BI6Q France has about 1 million km of roads [1], lets assume at least 2m wide. That's 2,000 sq km. How many of these roads can you see on this picture https://imgur.com/FCyt4O6 https://imgur.com/FCyt4O6 [1] https://en.wikipedia.org/wiki/List_of_countries_by_road_network_size https://en.wikipedia.org/wiki/List_of_countries_by_road_netw...
hokkos 7y ago
It is becoming very hard to install news wind onshore in France, people are revolting against wind turbine because it decrease real estate price and are found ugly and noisy, and it is happening at a way lower penetration rate than Germany.