Talk:Nuclear reactor

message: Consider rephrasing:
"The power output of the reactor is controlled by controlling how many neutrons are able to create more fissions."  --67.186.249.241 (talk) 03:29, 20 May 2010 (UTC)
replies: text: The power output of the reactor is controlled by maintaining a certain neutron density within the core by use of control rods and the boron concentration of the reactor coolant water. Gilawson (talk) 19:59, 20 May 2010 (UTC)
thread_title: Controlled by Controlling

message: The article should mention the power output of a typical modern reactor. AxelBoldt 02:03, 15 October 2007 (UTC)
thread_title: Power output

message: "The only purpose for these reactors was the mass production of plutonium (primarily at the Hanford Site) for nuclear weapons against Japan"
The "against japan" part is only right when you know how WWII ended. At the time, the fear was that Germany would develop nuclear weapons before the allies, and the purpose of the Manhattan project was primarily to use the weapon against Nazi Germany. Now the war in Europe ended before the bomb was finished, and then it was decided that it could be used against Japan instead. Japan did not have capacity to develop the bomb at the time.  —Preceding unsigned comment added by 193.75.59.10 (talk) 08:29, 19 July 2008 (UTC)
thread_title: Historic development

message: Under the heading "Radioactive decay" I have removed the last sentence which read "it is the best way for producing energy in the future"
Aside from the fact there was no capital letter, the obvious next question would be "Says who?"  —Preceding unsigned comment added by Finewinescotland (talk • contribs) 08:54, 24 October 2007 (UTC)
thread_title:  Classification by type of nuclear reaction 

message: Simply listing the components does not help. Diagrams of a nuclear reactor apparatus would be much more effective, explaining each step in the mechanism.
Louiechefei28848888 (talk) 04:04, 23 March 2008 (UTC)
thread_title:  How it works 

message: I would like to pose two changes to the Fusion Reactor Section:
# While the statement that fusion reactors can operate "without the complexities of handling actinides," I think it should be mentioned that D-T (ITER's reaction) and D-D fusion reactions still produce highly energetic neutron radiation.  I would like to mention this so a newcomer to the article will know that fusion reactions have inherent setbacks (aside from the sustainability issue).
# I would like to contend the statement that ITER is an attempt to "commercialize fusion power."  ITER's purpose is to show that sustainable, controlled fusion reactions are possible and, if so, perform radiation damage/material tests.  Commercialization is an entirely different endeavor.
(Sorry to be so nit-picky.) THaskin (talk) 01:06, 21 August 2008 (UTC)
thread_title:  Two Changes to the Fusion Reactor Section 

message: I haven't given a reference in the text for the change, but it's here if anyone's interested. The WP article has already been converted. --Old Moonraker (talk) 08:33, 20 November 2008 (UTC)
replies: text: It was new to me, too. My main reason for preferring "oid" was consistency with the Actinoid article, which opens with “The actinoid (according to current IUPAC terminology; previously actinide) series...” However the focus there is chemistry, not the nuclear industry. The citation above is pretty firm, but the one in the text isn't from a mainstream publication.--Old Moonraker (talk) 06:48, 21 November 2008 (UTC)
thread_title:  Modern terminology "actinoid" 

message: Apparently the International Union of Pure and Applied Chemistry decided many years ago to change the name of lanthanides and actinides to lanthanoids and actinoids.  Yet somehow the word has not gotten out.  I had not heard of the term before, and I've read quite a few papers.  It raises the question: what if they invented a "standard" and nobody adopted it?  Or perhaps: if a standard grows in the forest and no one knows about it, is it really a standard?  But seriously, if no one in the nuclear energy business uses the term, is it really the "standard"?  I think we should return to the terminology that is normally used.  If someone wants to drop a footnote that chemists have changed the name, but this change hasn't been picked up in the nuclear field, that would be fine. NPguy (talk) 23:55, 20 November 2008 (UTC)
replies: text: It was new to me, too. My main reason for preferring "oid" was consistency with the Actinoid article, which opens with “The actinoid (according to current IUPAC terminology; previously actinide) series...” However the focus there is chemistry, not the nuclear industry. The citation above is pretty firm, but the one in the text isn't from a mainstream publication.--Old Moonraker (talk) 06:48, 21 November 2008 (UTC)
thread_title:  You say actinoid, I say actinide 

message: please include a classification by size and mention Micro nuclear reactors
too bad Micro nuclear reactor link doesn't show any real reactors, they're small because they aren't shielded (there is a picture of a dead guy for scale at the bottom of sstar. Russians had a smaller "naked reactor" in a coal mine that killed a lot of people. Aqueous uranyl acetate and sodium borate, as the water boiled away the borate became more concentrated. Problem was the steam in the boiling water bubbles had no borate. 
Shjacks45 (talk) 14:14, 31 October 2009 (UTC)
thread_title:  Classification by size 

message: Following the spirit of this edit, I'm considering moving the text again, to the caption of the  "nuclear fission" image. Views? --Old Moonraker (talk) 16:34, 5 August 2009 (UTC)
replies: text: No objections: done it. Thanks to User:98.217.14.211 for noticing this. --Old Moonraker (talk) 08:22, 7 August 2009 (UTC)
thread_title:  Bombs 

message: What is the smallest fission reactor ever built?  —Preceding unsigned comment added by 217.219.151.190 (talk) 14:13, 16 September 2009 (UTC)
thread_title:  The smallest 

message: Lead currently reads in part There are also other less common uses as discussed below. Two problems with this:
1. There are far more research reactors in the world than naval propulsion reactors, so what it says is simply untrue.
2. It's not obvious where below it's discussed. At the very least, it needs a section on other reactors (and I'd suggest that naval propulsion reactors go in this section too, although they do have some similarities to NPPs, but there are some important differences, for example the level of fuel enrichment).
Other views? Andrewa (talk) 20:44, 25 December 2009 (UTC)
thread_title: Article lead

message: While I've never been a union member, I feel they do have a place in the the article under "People" - particularly since they have Wikipedia articles.  How would you all feel about inclusding just the sentence:
In the United States and Canada, workers except for management, professional (such as engineers) and security personnel are likely to be members of either the International Brotherhood of Electrical Workers (IBEW) or the Utility Workers Union of America (UWUA).
Would that be acceptable? Simesa (talk) 18:14, 10 April 2010 (UTC)
replies: text: There having been no discussion on this in 5 days, I'm going to put the text in.  Note that it was in for quite awhile, then expanded (inappropriately), then removed. Simesa (talk) 11:25, 15 April 2010 (UTC)
thread_title:  Mention of unions 

message: I was just wondering: aren't there any stirling engine nuclear power plants ? A stirling engine is more efficient than a steam engine/turbine, so ...
KVDP (talk) 10:18, 8 June 2010 (UTC)
thread_title: Stirling engine plants ?

message: I clicked on the link "Generation I Reactor"  in section 5.1.4 and it redirected me to a page about Generation 2 reactors.  This link needs to be redirected to the page about Generation 1 reactors.  Thank you.  —Preceding unsigned comment added by 76.110.211.243 (talk) 20:37, 11 March 2011 (UTC)
replies: text: This is because we have no article on Generation I Reactor yet, and it is partly covered in Generation II Reactor. Materialscientist (talk) 23:49, 11 March 2011 (UTC)
thread_title:  Bad Link 

message: Reactor seems a strange name for a fission core. Who introduced the term ? Was it after the Chicago Pile ? Rod57 (talk) 10:42, 20 March 2011 (UTC)
replies: text: In the original UK patent (Szilard was working in Britain when he filed it) it was referred to as an 'atomic furnace' or 'atomic boiler' (as in a steam engine) as that was what it represented as a piece of equipment used to replace an earlier technology, being used to heat water, however the name 'reactor' came about because of the crossover with the field of Chemistry, as a 'reactor' is a piece of equipment where chemical reactions take place. The original usage is probably more accurate though. If you want to find out about Leo Szilard's nuclear work in London then I suggest you also read Jacob Bronowski, as the two were great friends.  —Preceding unsigned comment added by 86.112.68.219 (talk) 20:17, 3 April 2011 (UTC)
replies: text: The term atomic boiler would cover only power reactors, and is to be avoided also as atomic has been replaced by the more accurate nuclear in both technical and general usage. Andrewa (talk) 18:18, 21 May 2018 (UTC)
thread_title:  Why was it called a reactor 

message: Why do not add links to simulatots of various reactors ?
194.146.217.38 (talk) 19:30, 12 April 2011 (UTC)
thread_title:  Question 

message: I'm confused by the illustration: according to my list of isotopes, both the Krypton and Barium isotope do not exist? 31.151.200.128 (talk) 11:04, 29 April 2011 (UTC)
thread_title:  illustration 

message: The section Heat generation boldly claims:
:A kilogram of uranium-235 (U-235) ... releases approximately three million times more energy than a kilogram of coal burned conventionally (7.2 × 10¹³ joules per kilogram of uranium-235 versus 2.4 × 10⁷ joules per kilogram of coal).[3][4]
Source [3] refers to coal. Source [4] refers to a book on atomic bombs. Not much of the atomic bomb energy output is used for energy production, and most nuclear reactors aren't atomic bombs (AFAIK). I'm out for the real energy efficient power production in nuclear power plants, including energy losses for energy conversion and other leakages. It's easy to make a computation of the mass equation and make an E=mc², but that has little relevance for mass to energy conversion available in factual power production, since a lot of energy is lost in various processes. Rursus dixit. (mbork3!) 12:43, 8 March 2012 (UTC)
replies: text: That's stretching WP:CALC too far for my taste. I've marked it as original research. --Kvng (talk) 14:51, 11 March 2012 (UTC)
thread_title: Energy efficiency?

message: An external link Reactors Designed by Argonne National Laboratory is repeatedly added, and is now in twice. Uncontroversially, I removed just one of the two, but they're both back again. Firstly: I'm not sure about whether or not this falls within WP:ELNO and other views are requested. Secondly, I am confident that we don't need them twice and I will be removing, once again, the one in the "See also" section unless anyone can offer a good reason for its retention.--Old Moonraker (talk) 15:15, 11 May 2012 (UTC)
replies: text: Thanks, User:NPguy, for the fix. --Old Moonraker (talk) 06:29, 12 May 2012 (UTC)

text: Another RV, I'm afraid, back to where it was. See WP:ALSO for what's allowed in that section. --Old Moonraker (talk) 10:44, 14 May 2012 (UTC)
replies: text: OK, thank you. I wasn't aware that the "See Also..." section should only feature internal Wikipedia links. OK with the change you made. I just expanded that paragraph a bit to add a detail. --Neweb (talk) 07:13, 15 May 2012 (UTC)
replies: text: As User:Kvng points out, the material might work better as a reference, rather than just a link; in other words if it's that important, and keeping it within the parameters of WP:UNDUE, write it up! --Old Moonraker (talk) 09:31, 15 May 2012 (UTC)
thread_title:  "Reactors Designed by Argonne National Laboratory" 

message: The line:
:The kinetic energy of fission products is converted to thermal energy when these nuclei collide with nearby atoms.
is converted to:
:The kinetic energy evolved from fission disperses into space as nuclei collide with nearby atoms.
I reversed the change because:
:- There is no mention of the kinetic energy being converted into thermal, which is probably the most important thing that happens;
:- Kinetic energy cannot convert into anything if all it does is "disperse into space". The chances of that happening are very low as opposed to causing various collisions, creating heat.
:- Saying kinetic energy "evolves" is not descriptive of what happens, and is a confusing and imprecise use of the verb.
SkoreKeep (talk) 05:54, 25 December 2014 (UTC)
thread_title: Fission kinetic energy

message: This section is extremely poorly written and conceived. I will go through the problematic parts sentence by sentence.
I. "Mistakes do occur and the designers of reactors at Fukushima in Japan did not anticipate that a tsunami generated by an earthquake would disable the backup systems that were supposed to stabilize the reactor after the earthquake.[34]"
Truisms like "mistakes do occur" should not belong in an encyclopedia.
Designers of Fukushima reactors clearly anticipated tsunami since the reactors were protected by tsunami walls. 
This sentence should be removed.
II.
"According to UBS AG, the Fukushima I nuclear accidents have cast doubt on whether even an advanced economy like Japan can master nuclear safety.[35]" UBS AG is an insurance company, and what does it even mean to "master nuclear safety"?
This sentence should be removed.
III.
"An interdisciplinary team from MIT have estimated that given the expected growth of nuclear power from 2005–2055, at least four serious nuclear accidents would be expected in that period.[36]"
This is an extremely dishonest sentence and a prime example of how context-free citation can sometimes be worse than outright lying. The study, first of all, recommends further implementation of nuclear power. The sentence does not note that the probability analysis was based on a three-fold increase in nuclear reactors.
This increase is also not "the expected growth of nuclear power"; the article postulated a three-fold increase for the purpose of analyzing the impact of nuclear reactor increase. 
The sentence also incorrectly reports the conclusion reached by the study. The study concludes that, if current technology were to be used, and there was a three-fold increase in nuclear reactors, we can expect four core damage accidents. Whether that is acceptable or not is a policy question for a different forum. What is not acceptable is reporting four as "at least four."
This sentence should be removed.
IV.
"The nuclear power industry has improved the safety and performance of reactors, and has proposed new safer (but generally untested) reactor designs but there is no guarantee that the reactors will be designed, built and operated correctly.[33] "
I'm not sure what is this sentence supposed to convey. It certainly does not convey specific information.
This sentence should be removed.
I will remove all the sentences on safety in a week. I will leave the section heading for future additions of actual information.
Pensiveneko (talk) 12:55, 29 April 2015 (UTC)
replies: text: I'd support all of those edits.  There is a slight but noticeable pov slant in the article's safety section as it currently stands. OhNoitsJamie Talk 13:28, 29 April 2015 (UTC)
thread_title: Nuclear Safety

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thread_title:  External links modified 

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thread_title:  External links modified 

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thread_title:  External links modified 

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thread_title:  External links modified 

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thread_title:  External links modified 

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thread_title:  External links modified 

message: There are many problems with the current article. Just a few are listed below! Probably more to follow. Andrewa (talk) 18:58, 21 May 2018 (UTC)
replies: text: I agree. A reorganization is needed. I think the biggest problem is the classification. We can classify reactors in many ways, but the options are mainly by purpose (power, plutonium production (or military), research) or by type (fusion/fission, moderated/fast reactors). Maybe we can have both classifications. --Ita140188 (talk) 22:27, 6 June 2018 (UTC)
thread_title:  Multiple issues 

message: This article is excessively long and detailed owing to a merge from  and possibly also from  and perhaps even others.
This is an important topic and the article should be focused and accessible to the layperson. Classification should be covered but not in this much detail.  
The subtopic of reactor classification deserves its own detailed article, whether as a list or otherwise, with a main link from the relevant section here. Andrewa (talk) 18:58, 21 May 2018 (UTC)
thread_title: Article length and focus

message: Partly as a result of this merge and lack of focus I suspect, the section Reactor types is a mess.
Firstly, there are now two types of nuclear reactor: Fission and fusion. Nearly all current ones are fission, but there have been several fusion reactors constructed (if the Chicago pile was a reactor, then so is JET), ITER is under construction, and more are planned. Or, if this article is about fission reactors (and there's a case for that) then this should be stated in the lead, and possibly even by a hatnote to a more general article.
Then under purpose there have to date been three types of (fission) reactor: 
* Power reactors (a redlink, I can't believe that) that produce heat as the main product, including naval reactors and nuclear power station reactors (and one was also used for desalination and several for building heating but never exclusively)
* Plutonium production reactors (at least one also used for building heating) 
* Research reactors (which are often used for other purposes, notably medical radioisotope production and commercial and forensic neutron activation analysis but I don't think any have been designed or built with those as the primary purpose, I could be wrong, and one was used for plute production for Smiling Buddha)
Sources required of course. Andrewa (talk) 19:07, 21 May 2018 (UTC)
thread_title: Reactor types

message: We don't have subarticles any more. Andrewa (talk) 18:58, 21 May 2018 (UTC)
replies: text: I agree. A reorganization is needed. I think the biggest problem is the classification. We can classify reactors in many ways, but the options are mainly by purpose (power, plutonium production (or military), research) or by type (fusion/fission, moderated/fast reactors). Maybe we can have both classifications. --Ita140188 (talk) 22:27, 6 June 2018 (UTC)
thread_title: Hatnote

message: Comes Shoaibraza134 adding a reference to the "See also" list at the end of the article:
:Advantages and Disadvantages of Nuclear Energy
The advantages and disadvantages (numbering a convenient 9 each in the article) are long-known to the nuclear discussion; there is nothing new there.  The descriptions are single line explanations; they hardly cover the meaning, let alone the significance of the point.  Finally, the article seems to have been rather inexpertly translated (from Japanese?) containing interesting passages such as "Vigor is an alternative vigor but not a new vigor as Uranium material is a non-renewable source and its provisions are limited."  Even assuming vigor means energy, the sentence is clumsy.  I'm going to repeal the addition. SkoreKeep (talk) 16:46, 6 June 2018 (UTC)
thread_title:  Added a reference 

message: I just read about this subject here, of which honestly I don't really know much. The introduction mentions (second sentence) that nuclear reactors are, amongst other, used in propulsion in ships. Two sentences later, it is mention that steam turbines can be used to drive a ship's propeller. When you read this introduction and you have no idea about the subject, it makes you think big ships run on nuclear reactors, or at least, that's what I believed for a second (and I was shocked). But no, after reading the article on nuclear marine propulsion, I realised this is only a very rare method used for ship propulsion (I don't know anything about ship propulsion either). What I want to say is that nuclear ship propulsion should be explained in a separate chapter of the page (in a few lines) with a separate link to the article well shown (not linked in a word but consciously marked in that chapter). Nuclear marine propulsion doesn't seem to play such a big role in nuclear reactors, that it should be mentioned several times in the introduction of its main page. Thanks! twothousandandeighteen (talk) 23:21, 13 June 2018 (UTC)
replies: text: As we have a rather reduced number of civilian power reactors these days, I wouldn't underplay the importance of nuclear reactors for marine propulsion. Although the civilian use of them was barely a blip, their naval use has been and remains important, both for large carriers and vitally so for submarines. There's scope for rewording here, but not by that much. Andy Dingley (talk) 23:33, 13 June 2018 (UTC)
thread_title:  Misleading information in introduction 

message: Is it good to get more nuclear reactors in our lives  DHANUSH RAHUL (talk) 15:22, 19 November 2018 (UTC)
thread_title:  NUCLEAR reactors  

message: I strongly suspect not (as, for an example, I have edited articles for small typos, grammos, or similar without confirming that the entire remainder of the article is correct).
Assuming it is not, there are many statements that do not have a date associated with them, but should.  Some (but not all) examples below:
"This page was last edited on 15 January 2019, at 03:24." <well this is the line that prompted me to phrase the question the way I did>
"As of early 2019, the IAEA reports there are 454 nuclear power reactors and 226 nuclear research reactors in operation around the world.[1] [2]" <this is a good statement, "timeless" in some sense (I mean, anytime you read the article, the statement will be correct)>
"There are about 280 such reactors operating, in 56 countries."  <as of when?>
"Current technologies" <and then a whole section of technologies -- current as of when?>
"Generation III reactor (evolutionary improvements of existing designs 1996-present)" <when is the present?>
"Water cooled reactor. There are 104 operating reactors in the United States. Of these, 69 are pressurized water reactors (PWR), and 35 are boiling water reactors (BWR).[24]" <as of when?>
I imagine this is a common problem in Wikipedia articles that in some sense discuss something "current"?  What is the Wikipedia policy for dealing with this issue, and is this page in compliance with that policy?
PS: In my reading today about nuclear reactors and linked articles, I found many instances of this problem.
Rhkramer (talk) 19:11, 17 January 2019 (UTC)
replies: text: Unfortunately this is a problem throughout Wikipedia, there is also a guideline for this: MOS:CURRENT. If you find these statements and you have time, you may solve some of them by looking at the original source and adding a "as of ..." date. --Ita140188 (talk) 08:58, 18 January 2019 (UTC)

text: Ok, thanks very much! Rhkramer (talk) 02:12, 28 January 2019 (UTC)
thread_title:  Is everything in this article up-to-date as of 15 January 2019, at 03:24? 

message: A proper definition for reactivity is missing, and I would propose to add an extra article on "reactivity (nuclear engineering)". When is rho = (k-1)/k used and when rho = ln(k)? --Gunnar (talk) 13:35, 12 April 2020 (UTC)
thread_title:  reactivity 

message: I was not expecting this to be at all controversial. My mistake.
I should in hindsight have raised an RM for  rather than boldly moving it and making that page a DAB. My mistake as I said.
I think the next step in the light of discussion above should be an RM  -> .
Comments? Other suggestions? Andrewa (talk) 14:53, 9 October 2020 (UTC)
thread_title: Maybe an RM

message: Can pool type really refer to an open pool reactor? This seems to me to be a Wikipedia invention, possibly invented by people who had heard of pool type LMFBRs and didn't know the difference. Mind you, Wikipedia has enormous influence so maybe the term has caught on. If so and it's in sources now obviously we can use it too! But I think we need a source (and if the sources are all more recent than our usage won't that be interesting). Andrewa (talk) 23:03, 8 October 2020 (UTC)
thread_title:  Dubious 

message: The section on by coolant is particularly cringeworthy... I've made some changes but unsure whether it's even an improvement. Probably needs a complete rewrite... eg no mention of RBMK and SGHWR and not obvious where they go as they're not BWRs, but the bullet on the BWR would currently suggest they are. Andrewa (talk) 23:22, 8 October 2020 (UTC)
thread_title:  Expert needed 

message: The following Wikimedia Commons file used on this page or its Wikidata item has been nominated for deletion:
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thread_title:  A Commons file used on this page or its Wikidata item has been nominated for deletion