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<p class="MsoNormal"><span style="color:#1F497D">See below for answers from Salem – feel free to reach out with any other questions. I also used to be the RC/CVCS system engineer and have a good knowledge of our filters and strategy.<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">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Lucida Handwriting";color:gray">Jen Tutterow</span></b><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:black">Radiological Engineer – Salem ALARA</span><span style="font-size:12.0pt;font-family:Wingdings;color:#FF6600"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt;font-family:Wingdings;color:#FF6600">R</span><span style="font-size:12.0pt;font-family:"Rockwell","serif";color:#FF6600">
</span><b><span style="font-size:12.0pt;font-family:"Georgia","serif";color:#1F497D">PSEG
</span></b><b><i><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#FF6600">Nuclear LLC</span></i></b><span style="font-size:12.0pt;font-family:"Courier New";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:black"><a href="mailto:Jennifer.Tutterow@pseg.com"><span style="font-family:"Times New Roman","serif";color:blue">Jennifer.Tutterow@pseg.com</span></a><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:black">856-339-1575</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";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><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Global [mailto: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></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<b><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:red">***CAUTION***</span></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p></o:p></span></p>
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<b><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:red">***CAUTION***</span></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p></o:p></span></p>
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<b><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:red">***CAUTION***</span></b><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" style="mso-line-height-alt:0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">This e-mail is from an
<b>EXTERNAL </b>address. The actual sender is (global-bounces@list.rpalara.org) which may be different from the display address in the From: field. Be cautious of clicking on links or opening attachments. Suspicious? Report it via the Report Phishing button.
On mobile phones, forward message to IT Security.<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><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:l0 level1 lfo1">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></ol>
<p class="MsoNormal" style="margin-left:.25in"><span style="color:red">Salem uses 0.05 micron filters in the “RCS filter” on our CVCS/letdown system during the cycle. We use a step down system starting with a 1 or 2 micron filter for start-up from an outage
and then stepping down in size every 3 months. <o:p></o:p></span></p>
<ol style="margin-top:0in" start="2" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1">What dose rate limits do you use for change out of those filters?<o:p></o:p></li></ol>
<p class="MsoNormal" style="margin-left:.25in"><span style="color:red">We typically don’t hit a rad limit but rather a physical dP limit.
<o:p></o:p></span></p>
<ol style="margin-top:0in" start="3" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1">For those using them, how much has the smaller filter size impacted change out frequency?<o:p></o:p></li></ol>
<p class="MsoNormal" style="margin-left:.25in"><span style="color:red">Typically we might see the filter needing to be changed prior to the 3 month frequency once or twice but it is based on dP.<o:p></o:p></span></p>
<ol style="margin-top:0in" start="4" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1">Have the smaller filter sizes had a worthwhile impact on plant source term?
<o:p></o:p></li></ol>
<p class="MsoNormal" style="margin-left:.25in"><span style="color:red">We have been seeing an improvement on the dose, but we have also just started using PRC-01 resin in the last cycle or two so it is hard to quantify what is the filter and what is the resin.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.25in"><span style="color:red"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.25in"><span style="color:red">We did see an impact on lowering dose rates over the SFP with a filter larger than 0.05 micron in a matter of 12 hours to a day during an evolution last cycle though.<o:p></o:p></span></p>
<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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