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Reply #12: Nuclear requires more water than coal or gas for the same size plant [View All]

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bananas Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Aug-23-10 06:34 PM
Response to Reply #10
12. Nuclear requires more water than coal or gas for the same size plant
And of course wind and PV don't require any water.
From Nuclear Engineering International Magazine:

Cooling of plants: a constraint on growth?
02 July 2008

An important economic and environmental consideration that needs to be taken into account when planning for new nuclear plants is their method of cooling. By Steve Kidd


Nuclear plants currently being built have about 34-36% thermal efficiency, while one of the new reactor designs boasts up to 39%. In comparison, a typical new coal plant runs at 36%, while some new coal-fired plants approach 40%. In determining the cooling requirement, these distinctions are not insignificant. For example, any power plant running at 33% thermal efficiency must discharge about 14% more heat than one at 36% efficiency. Coal plants have a slight edge over nuclear plants and a correspondingly reduced need for cooling water.


Because combined-cycle gas turbine (CCGT) plants release much of their heat to the air in the turbine exhaust, they require only about one third as much cooling as normal thermal plants, and this is commonly done through dry cooling. Hence they can achieve thermal efficiencies in the 60-70% range.


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  -TVA Has Lost $50 Million Cutting Brown's Ferry Output - Tennessee River Too Hot To Cool Plant hatrack  Aug-23-10 12:24 PM   #0 
  - It sucks but the river matters more.  aquart   Aug-23-10 12:35 PM   #1 
  - I knew this would happen somewhere eventually  EC   Aug-23-10 12:40 PM   #2 
  - Don't worry NNadir will respond  The Croquist   Aug-23-10 01:30 PM   #7 
  - You know that basically all forms of concentrated electricity require some kind of coolant, right?  TheWraith   Aug-23-10 04:03 PM   #8 
  - In many of those cases a retaining pond is sufficient  EC   Aug-23-10 04:16 PM   #9 
     - A nuclear plant doesn't need a "whole lake or river" either.  TheWraith   Aug-23-10 04:51 PM   #10 
     - Nuclear requires more water than coal or gas for the same size plant  bananas   Aug-23-10 06:34 PM   #12 
     - When you can show me a solar panel producing 2 gigawatts continuously every second of every day...  TheWraith   Aug-24-10 12:59 PM   #13 
     - Correct  DrGregory   Aug-24-10 10:38 PM   #21 
        - That talking point has been thoroughly debunked  bananas   Aug-25-10 09:15 AM   #28 
        - You can't debunk physics by making things up.  TheWraith   Aug-25-10 09:47 AM   #29 
        - incorrect  AlecBGreen   Aug-25-10 02:02 PM   #34 
           - did some more searching  AlecBGreen   Aug-25-10 02:38 PM   #35 
              - Yup - even a desert only reflects about 30%  bananas   Aug-25-10 05:34 PM   #37 
                 - you need to go beyond grade-school physics  DrGregory   Aug-27-10 02:04 PM   #44 
                    - I don't think you understand the physics at all  muriel_volestrangler   Sep-12-10 08:10 AM   #46 
                       - Not quite  DrGregory   Sep-12-10 03:06 PM   #47 
                       - I do understand the physics...  DrGregory   Sep-12-10 03:14 PM   #48 
                          - If there was no reradiation, then the earth would heat up an infinite amount  muriel_volestrangler   Sep-12-10 03:36 PM   #49 
                          - Yup - too many basic errors  bananas   Sep-13-10 06:25 PM   #51 
                          - KICK  kristopher   Sep-13-10 11:57 AM   #50 
                          - Nope - let me try to explain this as simply as possible  bananas   Sep-14-10 10:26 AM   #52 
                             - +1  kristopher   Sep-17-10 12:12 AM   #53 
                                - kick. nt  bananas   Sep-17-10 02:26 AM   #54 
     - PV requires LOTS of water  XemaSab   Aug-24-10 08:50 PM   #17 
     - Where did you learn to do arithmetic  DrGregory   Aug-24-10 10:30 PM   #20 
     - LOL - "Steve Kidd is Director of Strategy & Research at the World Nuclear Association"  bananas   Aug-25-10 08:00 AM   #27 
     - 2002 EPRI report: "Water & Sustainability (Volume 3): U.S. Water Consumption for Power Production  bananas   Aug-25-10 09:50 AM   #30 
        - Table S1, fixed-width font  bananas   Aug-25-10 12:44 PM   #32 
           - The table shows that nuclear plants use much more water, regardless of cooling method.  bananas   Aug-25-10 12:46 PM   #33 
     - Correct arithmetic  DrGregory   Aug-24-10 10:51 PM   #22 
     - Commonwealth Edison  DrGregory   Aug-24-10 11:04 PM   #24 
     - Correct  DrGregory   Aug-24-10 11:18 PM   #25 
  - sanme old  DrGregory   Aug-24-10 09:51 PM   #19 
  - So the river water is too warm to effectively cool the reactors?  liberal N proud   Aug-23-10 12:52 PM   #3 
  - It's local and temporary. On the other hand,  Jackpine Radical   Aug-23-10 01:04 PM   #4 
  - NO.,..  DrGregory   Aug-27-10 01:50 PM   #43 
  - Have there been any reports from coal-fired plants in the region?  NickB79   Aug-23-10 01:09 PM   #5 
  - It only matters with nuclear  Dogmudgeon   Aug-23-10 01:22 PM   #6 
  - It matters with nuclear power plants because they require a larger supply of coolant  madokie   Aug-23-10 04:52 PM   #11 
  - Well, pretty much everything you just said is untrue, but feel free to keep believing.  TheWraith   Aug-24-10 01:04 PM   #14 
  - coal gas and oil is not our only options  madokie   Aug-24-10 07:08 PM   #16 
     - Deleted message  Name removed   Aug-24-10 09:40 PM   #18 
     - and what medical waste is this you speak of  madokie   Aug-25-10 06:34 AM   #26 
        - I'm going by the staments of Francesco Fonti...  Dead_Parrot   Aug-25-10 04:39 PM   #36 
           - Since this is something that worries me  madokie   Aug-26-10 07:21 AM   #38 
              - Fair enough...  Dead_Parrot   Aug-26-10 11:11 PM   #41 
                 - What I'm finding is it all goes back to the Ndrangheta turncoat you mentioned  madokie   Aug-27-10 08:13 AM   #42 
     - The founder of Greenpeace disagrees with you.  TheWraith   Aug-25-10 10:42 AM   #31 
     - storage is co2 emitting???  DrGregory   Aug-26-10 12:33 PM   #40 
  - WRONG!!  DrGregory   Aug-24-10 10:59 PM   #23 
  - matters with coal too  DrGregory   Aug-26-10 11:55 AM   #39 
  - It's not a problem for the plant; only the environment  DrGregory   Aug-27-10 02:12 PM   #45 
  - No one could have imagined  pscot   Aug-24-10 02:17 PM   #15 

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