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<p class="MsoNormal"><span style="color:#1F497D">DC Cook does not use sub-micron filtration.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Olga Juza<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">DC Cook</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Global <global-bounces@list.rpalara.org> <b>On Behalf Of
</b>Mingus, Cris S<br>
<b>Sent:</b> Monday, July 27, 2020 1:50 PM<br>
<b>To:</b> global@list.rpalara.org<br>
<b>Subject:</b> [EXTERNAL] [Global] sub-micron filtration<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black">This is an
<b>EXTERNAL</b> email. <b>STOP</b>. <b>THINK</b> before you CLICK links or OPEN attachments. If suspicious please click the '<b>Report to Incidents</b>' button in Outlook or forward to
<a href="mailto:incidents@aep.com">incidents@aep.com</a> from a mobile device.</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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<p class="MsoNormal">To all,<o:p></o:p></p>
<p class="MsoNormal">I have several questions about the use of sub-micron filtration (<0.1 micron) in the industry.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoNormal" style="mso-list:l1 level1 lfo3">How many of you are using sub-micron filtration in your primary demineralizer (Let down system here) and spent fuel pool systems?<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level1 lfo3">What dose rate limits do you use for change out of those filters?<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level1 lfo3">For those using them, how much has the smaller filter size impacted change out frequency?<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level1 lfo3">Have the smaller filter sizes had a worthwhile impact on plant source term?
<o:p></o:p></li></ol>
<p class="MsoListParagraph"><o:p> </o:p></p>
<p class="MsoListParagraph" style="margin-left:0in">Thank you for your answers,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Cris Mingus<o:p></o:p></p>
<p class="MsoNormal">Davis-Besse ALARA Services Supervisor<o:p></o:p></p>
<p class="MsoNormal">Work (419) 321-7854<o:p></o:p></p>
<p class="MsoNormal">Cell (419) 707-3188<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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