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		<updated>2026-05-22T19:33:46Z</updated>
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	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:3131:_Cesium&amp;diff=384644</id>
		<title>Talk:3131: Cesium</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:3131:_Cesium&amp;diff=384644"/>
				<updated>2025-08-20T19:11:54Z</updated>
		
		<summary type="html">&lt;p&gt;2600:387:4:803:0:0:0:1B: Tokaimura criticality accident&lt;/p&gt;
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&lt;div&gt;&amp;lt;!-- Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom. --&amp;gt;&lt;br /&gt;
I think that's called a recipe for disaster. NOTE: I am also 104.225.172.143. [[Special:Contributions/138.43.101.123|138.43.101.123]] 14:36, 20 August 2025 (UTC)&lt;br /&gt;
: No, ''I'' am 104.225.172.143! [[Special:Contributions/82.13.184.33|82.13.184.33]] 15:09, 20 August 2025 (UTC)&lt;br /&gt;
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My best recipe comes with a Notice to Mariners [[User:Hcs|Hcs]] ([[User talk:Hcs|talk]]) 14:45, 20 August 2025 (UTC)&lt;br /&gt;
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I added a transcript. Hopefully it's okay. [[Special:Contributions/104.225.172.143|104.225.172.143]] 14:54, 20 August 2025 (UTC)&lt;br /&gt;
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A gram of gold runs on the order of ~$100 USD as of writing; a gram of cs-137 looks to be in the millions~billions range. --[[Special:Contributions/158.91.163.9|158.91.163.9]] 14:55, 20 August 2025 (UTC)&lt;br /&gt;
:Caesium contamination usually is caused by nuclear accidents (or atmospheric nuclear weapon tests) https://en.wikipedia.org/wiki/Caesium-137#Environmental_contamination. It is unlikely that someone acquired pure Cs-137 and then &amp;quot;accidentally&amp;quot; contaminated the shrimp with that. --[[Special:Contributions/134.102.219.31|134.102.219.31]] 15:31, 20 August 2025 (UTC)&lt;br /&gt;
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Bothering the NSA shouldn't be hard, just write some of their secrets on a cake (with frosting is optional) and post it online. [[Special:Contributions/212.101.26.209|212.101.26.209]] 14:57, 20 August 2025 (UTC)&lt;br /&gt;
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What would IMO do, revoke your math license? [[Special:Contributions/216.73.162.10|216.73.162.10]] 15:22, 20 August 2025 (UTC)&lt;br /&gt;
: They have numerous penalties at their disposal. [[Special:Contributions/82.13.184.33|82.13.184.33]] 15:27, 20 August 2025 (UTC)&lt;br /&gt;
: I imagined the reason the IMO would get involved would be because the recipe created some interesting mathematical problem that could be used for the next competition. For example, something like [https://www.youtube.com/watch?v=Ct3lCfgJV_A this video], where a grocery order taken too literally creates a seemingly harmless Diophantine equation whose smallest positive solutions are on the order of 10^80. [[Special:Contributions/137.25.230.78|137.25.230.78]] 15:56, 20 August 2025 (UTC)&lt;br /&gt;
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Maybe The IATA could get involved if your ruined recipe caused food poisoning on a commercial airliner that then resulted in an in-air emergency (whole flight deck passed out).&lt;br /&gt;
:Or if you create a column of dense toxic fumes that spreads over a wide area (on the level of a volcano eruption). On the other hand, I wonder what could bring the attention of the IMO when Terryology seemingly couldn't.--[[Special:Contributions/94.73.52.245|94.73.52.245]] 18:56, 20 August 2025 (UTC)&lt;br /&gt;
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The criticality accident in 1999 at the Tokaimura nuclear facility seems like a good example of messing up a recipe in a way that draws considerable attention.  {{w|Tokaimura nuclear accidents}}  [[Special:Contributions/2600:387:4:803:0:0:0:1B|2600:387:4:803:0:0:0:1B]] 19:11, 20 August 2025 (UTC)&lt;/div&gt;</summary>
		<author><name>2600:387:4:803:0:0:0:1B</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3131:_Cesium&amp;diff=384641</id>
		<title>3131: Cesium</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3131:_Cesium&amp;diff=384641"/>
				<updated>2025-08-20T18:51:58Z</updated>
		
		<summary type="html">&lt;p&gt;2600:387:4:803:0:0:0:1B: /* Explanation */ wikilink IATA, IMO, NSA&lt;/p&gt;
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&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3131&lt;br /&gt;
| date      = August 20, 2025&lt;br /&gt;
| title     = Cesium&lt;br /&gt;
| image     = cesium_2x.png&lt;br /&gt;
| imagesize = 588x298px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Someday I hope to find a way to mess up a recipe so badly that it draws the attention of the International Air Transport Association, the International Mathematical Olympiad, or the NSA.&lt;br /&gt;
}}&lt;br /&gt;
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==Explanation==&lt;br /&gt;
{{incomplete|This page was created by a disastrous recipe-creating bot. Don't remove this notice too soon.}}&lt;br /&gt;
{{w|Cesium-137}} (Cs-137) is a radioactive {{w|isotope}} of {{w|Caesium|cesium (a.k.a. &amp;quot;caesium&amp;quot;)}}. This comic was posted the day after the {{w|FDA}} posted an [https://www.fda.gov/food/alerts-advisories-safety-information/fda-advises-public-not-eat-sell-or-serve-certain-imported-frozen-shrimp-indonesian-firm advisory] about frozen shrimp sourced from an Indonesian firm, because they were contaminated with radiation during shipment.&lt;br /&gt;
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Rather than being concerned about the potential health impacts, [[Megan]] and [[Cueball]] are curious about the technical details that led to this contamination. Cs-137 is normally a by-product of nuclear reactors and is occasionally used in {{w|Food_irradiation|food irradiation}}. Cueball and Megan cannot fathom how one could unintentionally contaminate shrimp with radioactive waste, and Cueball comments that his biggest culinary screw-up only attracted the attention of his local fire department, likely because he set something on fire while cooking. A real-life example of seemingly-random contamination by Cs-137 was the {{w|Goiânia accident}} in Brazil.&lt;br /&gt;
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The title text says that one of Cueball's (or possibly Randall's) ambitions is to draw the attention of various organizations ({{w|International Air Transport Association}} (IATA), {{w|International Mathematical Olympiad}} or the {{w|National Security Agency}} (NSA)) with a recipe he has butchered, either by accident or more likely, in this case, on purpose. Needless to say, it is difficult to imagine in a cooking error that could be in any way brought to the attention of IATA.&lt;br /&gt;
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==Transcript==&lt;br /&gt;
{{incomplete transcript|Don't remove this notice too soon.}}&lt;br /&gt;
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:[Megan, on the left, looks at a news story on her phone next to Cueball.]&lt;br /&gt;
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:Megan: There's a recall of frozen shrimp contaminated with cesium-137.&lt;br /&gt;
:Cueball: With ''what?''&lt;br /&gt;
:Megan: I know, right?&lt;br /&gt;
:Cueball: ''How!?''&lt;br /&gt;
&lt;br /&gt;
:[Megan puts her phone away and shrugs.]&lt;br /&gt;
:Megan: No idea, but I bet it involved some expensive equipment. Those cesium sources aren't cheap.&lt;br /&gt;
:Cueball: Man.&lt;br /&gt;
&lt;br /&gt;
:[Megan stops shrugging, with Cueball in thought.]&lt;br /&gt;
:Megan: It's honestly a little inspiring to realize that it's always possible to screw up in a totally new way.&lt;br /&gt;
:Cueball: Yeah, the biggest agency whose attention '''''I've''''' drawn by messing up a recipe is the local fire department.&lt;br /&gt;
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{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;/div&gt;</summary>
		<author><name>2600:387:4:803:0:0:0:1B</name></author>	</entry>

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