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<p class="MsoNormal">Here at BV last summer we went to a NANO-Fiber Filter in Unit 2 after our outage. So at Unit 2 it has been running for 1 cycle. At Unit 1 we just installed the NANO-Fiber Filter about 3 months ago after Unit 1 outage. So far we have
not seen any changes as far going out on D/P any sooner. Will have more info as far as General Area Dose Rates here in about a month when we shut down to perform the Unit 2 outage. The NANO-Fiber’s we are currently running are 1 Micron pore size.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Prior to changing to the NANO-Fiber Filter’s we were running 0.1 - 0.45 Micron pore size Pall filters.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:18.0pt;font-family:"Rage Italic"">Ryan S. Kurylo<o:p></o:p></span></p>
<p class="MsoNormal">RP/ALARA<o:p></o:p></p>
<p class="MsoNormal">724-682-7638<o:p></o:p></p>
<p class="MsoNormal"><img width="228" height="37" style="width:2.375in;height:.3854in" id="Picture_x0020_1" src="cid:image001.png@01D7A956.820E3610"><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> Global <global-bounces@list.rpalara.org> <b>On Behalf Of
</b>R.VanHoorebeck@dominionenergy.com<br>
<b>Sent:</b> Tuesday, September 14, 2021 10:29 AM<br>
<b>To:</b> global@list.rpalara.org<br>
<b>Subject:</b> [External] [Global] Nano-fiber filtration<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here at Surry we are trying to reduce our overall CRE. I’m interested in plants that may be using nano-fiber filters in their RCS letdown.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Does your plant use nano-fiber technology in your RCS letdown?<o:p></o:p></b></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><b>If yes, do your filters DP out more frequently or do you see filters reaching dose rate limits more quickly?<o:p></o:p></b></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><b>If you changed from micron filtration to nano-fiber, did you seen a reduction in your overall GA dose rates?<o:p></o:p></b></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><b>If you have evaluated the use of nano-fiber filters and decided not to use them, I’d be interested in why your plant decided against them.<o:p></o:p></b></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><b>Any additional info would be much appreciated.<o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks so much!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><i><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#0070C0">Doug VanHoorebeck<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#0070C0">ALARA Supervisor<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#0070C0">Surry Power Station<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#0070C0">W: 757-365-2642<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#0070C0">C: 757-617-4191<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#0070C0"><a href="mailto:r.vanhoorebeck@dominionenergy.com"><span style="color:#0070C0">r.vanhoorebeck@dominionenergy.com</span></a><o:p></o:p></span></i></p>
<p class="MsoNormal"><o:p> </o:p></p>
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