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	<id>https://energyeducation.ca/wiki/index.php?action=history&amp;feed=atom&amp;title=Pressurized_heavy_water_reactor</id>
	<title>Pressurized heavy water reactor - Revision history</title>
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	<updated>2026-04-29T13:41:14Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://energyeducation.ca/wiki/index.php?title=Pressurized_heavy_water_reactor&amp;diff=6303&amp;oldid=prev</id>
		<title>Jmdonev: 1 revision imported</title>
		<link rel="alternate" type="text/html" href="https://energyeducation.ca/wiki/index.php?title=Pressurized_heavy_water_reactor&amp;diff=6303&amp;oldid=prev"/>
		<updated>2018-05-18T22:53:12Z</updated>

		<summary type="html">&lt;p&gt;1 revision imported&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 22:53, 18 May 2018&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-notice&quot; lang=&quot;en&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</summary>
		<author><name>Jmdonev</name></author>
	</entry>
	<entry>
		<id>https://energyeducation.ca/wiki/index.php?title=Pressurized_heavy_water_reactor&amp;diff=6302&amp;oldid=prev</id>
		<title>Jmdonev at 22:27, 11 May 2018</title>
		<link rel="alternate" type="text/html" href="https://energyeducation.ca/wiki/index.php?title=Pressurized_heavy_water_reactor&amp;diff=6302&amp;oldid=prev"/>
		<updated>2018-05-11T22:27:39Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 22:27, 11 May 2018&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; &lt;/del&gt;[[Category:Done &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;2015&lt;/del&gt;-&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;07&lt;/del&gt;-&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;24&lt;/del&gt;]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Done &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;2018&lt;/ins&gt;-&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;05&lt;/ins&gt;-&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;18&lt;/ins&gt;]]  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[File:Bruce-Nuclear-Szmurlo.jpg|300px|thumb|Figure 1. The Bruce nuclear plant in Ontario uses 8 heavy water CANDU reactors, the most by any nuclear power plant in the world.&amp;lt;ref&amp;gt;Wikimedia Commons [Online], Available: http://en.wikipedia.org/wiki/CANDU_reactor#/media/File:Bruce-Nuclear-Szmurlo.jpg&amp;lt;/ref&amp;gt;]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[File:Bruce-Nuclear-Szmurlo.jpg|300px|thumb|Figure 1. The Bruce nuclear plant in Ontario uses 8 heavy water CANDU reactors, the most by any nuclear power plant in the world.&amp;lt;ref&amp;gt;Wikimedia Commons [Online], Available: http://en.wikipedia.org/wiki/CANDU_reactor#/media/File:Bruce-Nuclear-Szmurlo.jpg&amp;lt;/ref&amp;gt;]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;onlyinclude&amp;gt;A &#039;&#039;&#039;pressurized heavy water reactor&#039;&#039;&#039; is a type of [[nuclear reactor]] that makes use of [[heavy water]] (&amp;lt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;m&lt;/del&gt;&amp;gt;^2_1H_2O&amp;lt;/&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;m&lt;/del&gt;&amp;gt;) as its coolant and [[moderation|moderator]]. Heavy water contains an [[isotope]] of [[hydrogen]] called [[deuterium]].&amp;lt;/onlyinclude&amp;gt; Deuterium absorbs fewer [[neutron]]s than [[hydrogen]], which is extremely important as [[nuclear fission]] reactions require neutrons to carry out their chain reactions.&amp;lt;ref name=wolf&amp;gt;R. Wolfson, &quot;Nuclear fission&quot; in &#039;&#039;Energy, Environment, and Climate&#039;&#039;, 2nd ed., New York, NY: W.W. Norton &amp;amp; Company, 2012, ch. 7, sec. 4, pp.173&amp;lt;/ref&amp;gt; The heavy water is kept under [[pressure]] which increases its [[boiling point]] so that it can operate at high [[temperature]]s without boiling.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;onlyinclude&amp;gt;A &#039;&#039;&#039;pressurized heavy water reactor&#039;&#039;&#039; is a type of [[nuclear reactor]] that makes use of [[heavy water]] (&amp;lt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;chem&lt;/ins&gt;&amp;gt;^2_1H_2O&amp;lt;/&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;chem&lt;/ins&gt;&amp;gt;) as its coolant and [[moderation|moderator]]. Heavy water contains an [[isotope]] of [[hydrogen]] called [[deuterium]].&amp;lt;/onlyinclude&amp;gt; Deuterium absorbs fewer [[neutron]]s than [[hydrogen]], which is extremely important as [[nuclear fission]] reactions require neutrons to carry out their chain reactions.&amp;lt;ref name=wolf&amp;gt;R. Wolfson, &quot;Nuclear fission&quot; in &#039;&#039;Energy, Environment, and Climate&#039;&#039;, 2nd ed., New York, NY: W.W. Norton &amp;amp; Company, 2012, ch. 7, sec. 4, pp.173&amp;lt;/ref&amp;gt; The heavy water is kept under [[pressure]] which increases its [[boiling point]] so that it can operate at high [[temperature]]s without boiling.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Heavy water is rare, and extracting it from ordinary water is expensive. Although it comes at an increased price, it doesn&amp;#039;t require the [[uranium]] fuel to be [[nuclear power#Enrichment|enriched]] like in some other nuclear reactors. This greatly decreases the expense for the heavy water because uranium enrichment requires separate facilities and extensive processes.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Heavy water is rare, and extracting it from ordinary water is expensive. Although it comes at an increased price, it doesn&amp;#039;t require the [[uranium]] fuel to be [[nuclear power#Enrichment|enriched]] like in some other nuclear reactors. This greatly decreases the expense for the heavy water because uranium enrichment requires separate facilities and extensive processes.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Jmdonev</name></author>
	</entry>
	<entry>
		<id>https://energyeducation.ca/wiki/index.php?title=Pressurized_heavy_water_reactor&amp;diff=1490&amp;oldid=prev</id>
		<title>J.williams: 1 revision imported</title>
		<link rel="alternate" type="text/html" href="https://energyeducation.ca/wiki/index.php?title=Pressurized_heavy_water_reactor&amp;diff=1490&amp;oldid=prev"/>
		<updated>2015-08-26T21:31:33Z</updated>

		<summary type="html">&lt;p&gt;1 revision imported&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 21:31, 26 August 2015&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-notice&quot; lang=&quot;en&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</summary>
		<author><name>J.williams</name></author>
	</entry>
	<entry>
		<id>https://energyeducation.ca/wiki/index.php?title=Pressurized_heavy_water_reactor&amp;diff=1489&amp;oldid=prev</id>
		<title>J.williams at 16:58, 12 August 2015</title>
		<link rel="alternate" type="text/html" href="https://energyeducation.ca/wiki/index.php?title=Pressurized_heavy_water_reactor&amp;diff=1489&amp;oldid=prev"/>
		<updated>2015-08-12T16:58:39Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt; [[Category:Done 2015-07-24]]&lt;br /&gt;
[[File:Bruce-Nuclear-Szmurlo.jpg|300px|thumb|Figure 1. The Bruce nuclear plant in Ontario uses 8 heavy water CANDU reactors, the most by any nuclear power plant in the world.&amp;lt;ref&amp;gt;Wikimedia Commons [Online], Available: http://en.wikipedia.org/wiki/CANDU_reactor#/media/File:Bruce-Nuclear-Szmurlo.jpg&amp;lt;/ref&amp;gt;]]&lt;br /&gt;
&lt;br /&gt;
&amp;lt;onlyinclude&amp;gt;A &amp;#039;&amp;#039;&amp;#039;pressurized heavy water reactor&amp;#039;&amp;#039;&amp;#039; is a type of [[nuclear reactor]] that makes use of [[heavy water]] (&amp;lt;m&amp;gt;^2_1H_2O&amp;lt;/m&amp;gt;) as its coolant and [[moderation|moderator]]. Heavy water contains an [[isotope]] of [[hydrogen]] called [[deuterium]].&amp;lt;/onlyinclude&amp;gt; Deuterium absorbs fewer [[neutron]]s than [[hydrogen]], which is extremely important as [[nuclear fission]] reactions require neutrons to carry out their chain reactions.&amp;lt;ref name=wolf&amp;gt;R. Wolfson, &amp;quot;Nuclear fission&amp;quot; in &amp;#039;&amp;#039;Energy, Environment, and Climate&amp;#039;&amp;#039;, 2nd ed., New York, NY: W.W. Norton &amp;amp; Company, 2012, ch. 7, sec. 4, pp.173&amp;lt;/ref&amp;gt; The heavy water is kept under [[pressure]] which increases its [[boiling point]] so that it can operate at high [[temperature]]s without boiling. &lt;br /&gt;
&lt;br /&gt;
Heavy water is rare, and extracting it from ordinary water is expensive. Although it comes at an increased price, it doesn&amp;#039;t require the [[uranium]] fuel to be [[nuclear power#Enrichment|enriched]] like in some other nuclear reactors. This greatly decreases the expense for the heavy water because uranium enrichment requires separate facilities and extensive processes. &lt;br /&gt;
&lt;br /&gt;
The [[CANDU reactor]] is the first and most widely used heavy water reactor, with over 20 in commission in Canada and around the world in Romania, India, China, Pakistan, South Korea and Argentina.&amp;lt;Ref name=nuc&amp;gt;B. Everett, G. Boyle, S. Peake and J. Ramage, &amp;quot;Nuclear power&amp;quot; in &amp;#039;&amp;#039;Energy Systems and Sustainability&amp;#039;&amp;#039;, 2nd ed., Oxford, UK: Oxford, 2013, ch.10, pp.407-414&amp;lt;/ref&amp;gt;&amp;lt;ref&amp;gt;&amp;#039;&amp;#039;http://www.candu.org/candu_reactors.html&amp;#039;&amp;#039; online, accessed July 5th, 2015.&amp;lt;/ref&amp;gt; &lt;br /&gt;
&lt;br /&gt;
Visit the CANDU [[CANDU reactor|page]] for more details on heavy water nuclear reactors.&lt;br /&gt;
&lt;br /&gt;
==References==&lt;br /&gt;
{{reflist}}&lt;br /&gt;
[[Category:Uploaded]]&lt;/div&gt;</summary>
		<author><name>J.williams</name></author>
	</entry>
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