Talk:Nuclear fuel

message: Sorry DV8 2XL, I didn't bother to look at the history page until I had added several things to this article, so I didn't see that it has been merged with Nuclear fuel cycle in the past.  It makes sense, since I actually stole a paragraph from that article to explain the common nuclear fuel types.  As is, I think it is adequate to have this page focus on fuel forms as I've tried to do since I haven't yet found anything else this specific about fuel forms on wikipedia (unless I've just never looked in the right place). Hopefully I'll be able to find pictoral examples of each, but I wouldn't hold my breath. Lcolson 22:29, 14 December 2005 (UTC)
thread_title:  Past merge 

message: Nice work Cadmium, you added order to my chaotic additions.  I didn't even think of adding MOX and UOX (some of the many improvements). Lcolson 01:52, 16 January 2006 (UTC)
thread_title: Reordering/formating

message: I have forgotten what ever it is I said about this page - but it looks good now. I've made a few additions to it and some wikilinks, and I'm going to write a section on the fuels used in atomic battery applications shortly. --DV8 2XL 19:55, 31 January 2006 (UTC)
thread_title:  Nice page 

message: In February, 2006, a new U.S. initiative, the Global Nuclear Energy Partnership was announced - it would be an international effort to reprocess fuel in a manner making proliferation infeasible, while making nuclear power available to developing countries.  Would someone like to blend GNEP into this article? Simesa 20:57, 9 February 2006 (UTC)
thread_title:  [[Global Nuclear Energy Partnership]]  

message: Should not fuel be component or substance there?  Midgley 03:47, 4 April 2006 (UTC)
thread_title:  Fuels in pellet graphs? 

message: Is it possible to generate and capture energy in the process of cleaning up PCB waste?  Can that 'energy' be stored and used to power businesses or homes?
::PCBs are not nuclear fuel, but a chemical byproduct from various industrial practices, so this is not the correct place to post this... but I'll humor you.  
::If I remember my chemistry right, PCB's are poly-chlorinated biphenols.  I think it is a benzene ring on them that causes the problem (not sure... its been close to a decade since I learned about them).  You probably could burn them for energy, but if the burning process wasn't complete you would probably get some polutants going out the stack and poluting the air and poisening people, which is why no-one has probably tried doing this.Lcolson 20:50, 17 May 2006 (UTC)
thread_title:  Using PCBs as Energy 

message: I don't know about the rest of you, but PIE isn't the first thing I think of when I hear the words "nuclear fuels".  Also, I think spent fuel should be placed moved, as well as some other stuff.  I've never done much editting on here before, so anyone feel free to give me some criticism or reverse anything I do.Ajnosek 00:30, 23 June 2006 (UTC)
replies: text: I disagree with your edit to the section on chernobyl, the nature of the fuel can prevent a core damage accident from becoming a serious accident. The events at three mile island show that core damage does not always lead to a nasty accident with off site effects on the level 6 or 7 scale.Cadmium 20:45, 23 June 2006 (UTC)
replies: text: I didn't mean to change the meaning of what I was editting, but I can see how I did make that more vague now.  There was a misplaced modifier.  But that doesn't matter now since I see you yanked that whole section.  I was thinking about doing that myself, because I don't know how relavent it is to this page, but instead I just moved it to the bottom.  Thanks for the help.  Ajnosek 22:58, 23 June 2006 (UTC)
thread_title:  Article Restructuring 

message: I do not see the utility of the new diagram in the article lead.  Looking at what it was derived from, it looks like an attempt to make nuclear fuel appear in a bad light.  The nuclear symbol has been added in several spots with a dull red tinge around it, and two mushroom clouds and shells were also added the original photo is here. 
  
Now compare it to the new one.
The original image had none of these.  Plus, I do not think that a specific diagram about a type of nuclear fuel cycle should be at the front of an article about nuclear fuel.  I think the binding energy diuagram is much better as the lead diagram since it is much more general and fits with the article better.  69.129.195.170
:I think that there should definitely be something like the diagrams at the right somewhere on this page (showing the full fuel cycle) but I agree that the new one is inadequate for a few reasons, among them: misspelling of "depleted", the inclusion of radiological symbols even for things which are weakly radioactive (i.e. DU). I'm less concerned with the shells and the clouds, though -- they are pretty standard symbols and it is fairly incontrovertible that the fuel cycle can be put to weapons purposes.  I think the original one fails when it doesn't indicate that this has often been the result of certain ends of the fuel cycle. But I think the military/civilian uses should be differentiated, somehow. --Fastfission 04:23, 7 February 2007 (UTC)
replies: text: I agree.  A nuclear fuel diagram could compliment the article well, but the current one (the bottom picture) doesn't do it justice.  The top one is much better, but could still use some work.  Most of the spent fuel can be recycled, so that arrow should be larger and the waste smaller.  Also, can't MOX fuel be reprocessed too?  Maybe a simple arrow from "MOX fuel" to "power reactors" would be more appropriate than one going behind "power reactors".  Also, is there liquid waste (other than low level waste)?  Otherwise it is redundant.  Ajnosek 05:03, 10 February 2007 (UTC)
thread_title: New photo

message: The diagrams show graphs for an alleged power density of 1000W per m^3 , claiming the oxide fuel is destroyed under such conditions. However, many oxide fueled reactors produce more than 500MW. Wouldn't this imply that these reactors would have to contain millions of tonnes of uranium? Where am I going wrong here? 90.149.55.128 (talk) 23:22, 4 January 2008 (UTC)
replies: text: The graphs show several things.  First, with a constant power generation, and assuming normal conditions (realistic heat transfer coefficients, radial fuel geometry, etc...), the maximum temperature of the fuel (i.e. in the center of the radial pellet) will increase as the radius of the pellet increases (from more volume heating, and a higher volume to surface area ratio which translates into less heat loss).  Secondly, the graphs also show that for a constant pellet radius, the maximum temperature increases as the power density increases (kinda like turning a burner to a higher setting on an electric stove).Lcolson (talk) 23:45, 4 January 2008 (UTC)

text: Good catch 90.149.55.128.  The numbers are probably per meter of length of the fuel rod, not cubic meters of fuel.  I can't change it until I can verify this is the case. Paul Studier (talk) 23:54, 4 January 2008 (UTC)

text: I don't have your book.  From  we find that used Candu fuel, after a year, gives off 100W/20kg or 5W/kg.  A cubic meter of Candu fuel would probably weigh 10,000kg, so Candu fuel would give off 50,000W/m^3.  This far exceeds the figures given for an active reactor.  In addition, Candu fuel is not enriched so would be colder than LWR fuel. Paul Studier (talk) 19:16, 19 January 2008 (UTC)

text: I think you're missing the point to be honest. It seems like the units are wrong. A few hundred W per cubic meter would imply that the core of a large 1500MW reactor would be much larger than the quoted sizes in most designs. Think about it 1500 MW = 1500 000 000 W , so if the fuel's power density is only a few hudnred W , then the reactor would have to be several million cubic meters large, making it hundreds of meters each way. Obviously real power plants are not that large so the power density in the fuel must be much larger. Is it possible you got the units wrong ? I.e W rather than kW ? 85.224.219.135 (talk) 18:18, 21 January 2008 (UTC)

text: It also sounds as if there's a tad of original research involved in the graphs.  And one of the points to be delivered "The core is hotter than the rim." is apparently based upon the supposed design being considered; has a nuclear engineer stated that?  The designers of reactors would know such characteristics and whether those are desirable; if not desirable the design of actual reactors might reduce the undesired heat (there are three obvious changes, one of which would not be apparent in the location of fuel rods or other reactor diagrams).  -- SEWilco (talk) 04:43, 20 May 2008 (UTC)
thread_title: Power densities

message: What is the lightest possible reactor fuel - is there anything below thorium?  Particularly, is it possible to develop a mixture of comparatively light metals (well above Fe, of course) that are fissionable or can produce fissionable products, which once irradiated by an external source, produce short-lived radioactive products that continue to produce the radiation to catalyze further transmutation and fission steps?  If it is possible, does such an approach offer a way to avoid production of long-lived nuclear waste? Wnt (talk) 16:30, 30 June 2008 (UTC)
replies: text: See https://en.wikipedia.org/wiki/File:Chart_of_Nuclides_-_Thermal_neutron_fission_cross_sections.png. In short, no.50.147.26.108 (talk) 19:09, 17 April 2014 (UTC)
thread_title:  Lightest possible reactor fuel? 

message: The section on second generation nuclear fuels says "Neutrons are an unwanted byproduct of fusion reactions in an energy generation context, because they are absorbed by the walls of a fusion chamber, making them radioactive."  This is partially true, but for reactors using first generation fuels neutrons are an essential product, since they are used to generate tritium from Li-6 in blankets around the fusion chamber.  I would think that the neutron economy of the D-T fuel cycle would require close to a one-to-one conversion of neutrons to tritium. NPguy (talk) 18:11, 30 January 2010 (UTC)
thread_title:  Unwanted neutrons? 

message: Which should we use?  We should be consistent.  Ajnosek (talk) 19:55, 21 July 2010 (UTC)
replies: text: Use either, as appropriate.  A fuel assembly for a CANDU reactor is known as a fuel bundle. NPguy (talk) 17:06, 24 July 2010 (UTC)
thread_title:  Fuel "assembly" or "bundle"?

message: Hi all.  Roughly what is the full load (kg) of fuel per reactor type?  I can't find any information anywhere.  Any info appreciated. Captain deathbeard (talk) 10:04, 22 October 2010 (UTC)
thread_title:  Fuel Load 

message: This article tries to discuss Fissile and Fusionable fuels together. I don't see much logic in this - although they're both 'nuclear' thay have little else in common.
I think it should be split - probably into three - a very short intro as 'Nuclear Fuel' then separate articles for 'Nuclear Fusion Reactor Fuels' and 'Nuclear Fission Reactor Fuels' 
Any Thoughts ?  —Preceding unsigned comment added by 207.245.198.135 (talk) 10:34, 17 January 2011 (UTC)
replies: text: I think the two are already separated fairly cleanly and clearly.  They are both referred to in the intro; the bulk of the discussion is on fission fuels, but there is a short section on fusion fuels at the end. NPguy (talk) 01:22, 18 January 2011 (UTC)
thread_title:  Separate Fission from Fusion 

message: In the intro, thorium isn't mentioned at all (although this material seems to become quite popular nowadays due to people as Kirk Sorenson. Also, thorium is only briefly discussed furtherup, but only using 1 type of reactor (molten salt reactor which uses a composite fuel, rather than just plain thorium). I'm not sure whether thorium can be used at all on itself, but I assume so, and their do seam to be different reactors types using thorium, ie SSTAR. 
Finally, also mention that existing uranium reactors can be converted to run on thorium.
91.182.214.13 (talk) 13:43, 28 April 2011 (UTC)
replies: text: Thorium cannot run on it's own, as it's not fissile; it is fertile.  You need a fuel to help thorium start making U-233.  One concept is, once you have enough U-233 to remain critical, you can keep feeding the reactor more thorium to breed more fuel.  I know there are difficulties implementing this, but I do not know what they are, and I speculate that most thorium reactor designs would probably use a mix of fuels to sustain the reaction.  Ajnosek (talk) 04:24, 19 July 2011 (UTC)
replies: text: Greetings, I am willing to help anyone edit this page to provide a bit more information on thorium, which is the fuel of choice for India (and probably China as well.)  I will add a request on the Thorium page. Joel J. Rane (talk) 18:03, 8 March 2012 (UTC)
replies: text: Here thorium is only mention a few times and a section on the thorium fuel cycle might be appropriate here.--Stone (talk) 19:41, 8 March 2012 (UTC)
replies: text: This article does need a section on thorium fuel, but this need be no more than a summary of the main article on the thorium fuel cycle. NPguy (talk) 03:47, 10 March 2012 (UTC)
thread_title: Thorium ?

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thread_title: File:Advanced Test Reactor.jpg Nominated for Deletion

message: I acknowledge that the basic fundamental of nuclear fuel is that it gives off heat, which is used to create steam to power turbines.  But does nuclear fuel give off an electro-magnetic field?   If yes, why create steam?  Why not just use the electromagnetic field to power a motor?   If no electro-magnetic field is created,  then no further questions.  Marc S.  Dania Fl.  74.166.156.250 (talk) 01:18, 11 April 2012 (UTC)
replies: text: anybody want to answer this????  marc s.  74.166.156.250 (talk) 21:00, 11 April 2012 (UTC)
thread_title: Electro-Magnetic Field from nuclear fuel

message: I've heard (alas, not from a WP:RELIABLE source) that
"New fuel rods are only very slightly radioactive, and are safe to handle without shielding."
This seems counter-intuitive, since other fuels -- petrol, natural gas, gunpowder, etc. --
are generally considered far more dangerous when new.
After then energy has been extracted, the end product of such fuels -- carbon dioxide, water, etc. -- is generally inert and relatively harmless.
Can we add information to this article to either confirm or deny the above quote?
Does the radioactivity of a fuel rod monotonically increase as it is being used,
or monotonically decrease, or is there some more complicated behavior?
--DavidCary (talk) 15:02, 11 April 2012 (UTC)
replies: text: If this new fuel rod is only enriched uranium and no MOX fuel element, than it is radioactive similar to natural uranium in a hermetic metal tube. A fuel rod like that I would not consider a real danger if I do not have stay next to it for a few hours.--Stone (talk) 21:40, 11 April 2012 (UTC)
replies: text: Does nuclear fuel give off an electro-magnetic charge?   is it feasible for nuclear fuel to supply electric current instead of heat for steam power?  Marc S.  Dania Fl   74.166.156.250 (talk) 21:02, 14 April 2012 (UTC)
thread_title:  new fuel rods vs spent fuel rods 

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thread_title:  External links modified 

message: There is an image with the caption "Close-up of a replica of the core of the" in the article. I cannot make out what this is an image of, nor why it should be here. It does not appear to be an image of a fuel assembly, and I'm not sure that is even a part that accepts of fuel assembly. Is there any reason it should remain? Maury Markowitz (talk) 10:28, 27 September 2019 (UTC)
thread_title:  What is this image displaying? 

message: Please consider incorporating material from the above draft submission into this article. Drafts are eligible for deletion after 6 months of inactivity. ~Kvng (talk) 00:36, 18 November 2019 (UTC)
thread_title:  [[Draft:Accident Tolerant Fuels]] 

message: Should there be a section on this subject, or have I missed another relevant article of another name? --Danimations (talk) 02:31, 20 December 2020 (UTC)
thread_title:  Transportation of nuclear fuel 

message: In the Uranium dioxide section the graphic and paragraph (sentence) about zirconium don't explain why this thermal behaviour is important. I.e. what does zirconium have to do with anything here? I'm guessing the zirconium might be used as the container for the uranium oxide? Explanation is needed here...
Or, maybe these should be moved down to the Common physical forms of nuclear fuel section? - Dough34 (talk) 22:21, 24 March 2023 (UTC)
thread_title:  Sentence and graphic with no context 

message: I've been in a conversation
https://www.quora.com/What-is-the-process-for-disposing-of-used-nuclear-reactor-rods/answer/Terigi-Ciccone?__nsrc__=4&__snid3__=66067328665&comment_id=393209627&comment_type=2
with a contributor there who speaks of the cadmium metal rods that hold the uranium fuel pellets and then said when challenged I spent 2 days training at GE’s fuel rods manufacturing facilities in Wilmington N Carolina. No, cadmium is the metallic container of the fuel pellets and when loaded it’s never exposed in an unprotected environment.
I'm skeptical, but if they are right the article should be updated to reflect this. Can we find sources either way? Andrewa (talk) 07:14, 21 February 2024 (UTC)
replies: text: Cadmium is used in reactor control rods, but not in fuel cladding. NPguy (talk) 17:06, 21 February 2024 (UTC)
replies: text: Yes, that is my belief as well. I'm mainly interested in finding sources to verify this. If used in the cladding I guess it would be as a burnable poison. But I am not a nuclear engineer, just the son of one who is now no longer available to advise me on such matters. Andrewa (talk) 09:05, 24 February 2024 (UTC)
thread_title:  Cadmium