<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1256">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Aptos;}
@font-face
{font-family:Harrington;
panose-1:4 4 5 5 5 10 2 2 7 2;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:11.0pt;
font-family:"Aptos",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#467886;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0cm;
margin-right:0cm;
margin-bottom:0cm;
margin-left:36.0pt;
font-size:11.0pt;
font-family:"Aptos",sans-serif;}
span.EmailStyle22
{mso-style-type:personal-reply;
font-family:"Aptos",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
mso-ligatures:none;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1675378299;
mso-list-type:hybrid;
mso-list-template-ids:654973384 -1819001176 134807555 134807557 134807553 134807555 134807557 134807553 134807555 134807557;}
@list l0:level1
{mso-level-start-at:0;
mso-level-number-format:bullet;
mso-level-text:-;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Aptos",sans-serif;
mso-fareast-font-family:Aptos;
mso-bidi-font-family:"Times New Roman";}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l0:level4
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l0:level7
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l1
{mso-list-id:2139255805;
mso-list-template-ids:-471574036;}
@list l1:level1
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:36.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Symbol;}
@list l1:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:72.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:"Courier New";
mso-bidi-font-family:"Times New Roman";}
@list l1:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:108.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l1:level4
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:144.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l1:level5
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:180.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l1:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:216.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l1:level7
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:252.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l1:level8
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:288.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
@list l1:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:324.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;
mso-ansi-font-size:10.0pt;
font-family:Wingdings;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head><body lang="EN-GB" link="#467886" vlink="#96607D" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi Amy,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">At Sizewell B (4 loop Westinghouse SNUPPS), we continuously clean up the refuel pool (refuelling cavity filled) during outages and the fuel pool (fuel storage pond) using filters and demineralisers:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo2"><span style="mso-fareast-language:EN-US">Refuel pool in Containment, 5 micron filters and demineralisers during an outage. Tri-Nuc mobile unit for targeted cleaning e.g. cavity floor
after fuel moves (I think the filters are 100 micron, but will check). Skimmers deployed to clean refuel pool surface via the Tri-Nuc.<o:p></o:p></span></li></ul>
<p class="MsoListParagraph"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo2"><span style="mso-fareast-language:EN-US">Fuel Storage Pond in the Fuel Building, 5 micron filters and demineralisers permanently in service, with skimmers deployed to clean the fuel
pool surface. We have a smaller Tri-Nuc available for cleaning.<o:p></o:p></span></li></ul>
<p class="MsoListParagraph"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Also have the new DEKRA VT 1011 underwater vacuum for targeted cleaning, this is mainly for foreign material. Some RP issues with managing the strainer / filter units, ensuring the fuel team handles
these like Tri-Nuc filters using remote techniques.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">All the best,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Richard<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#FF6F18">Richard Parlone</span></b><span style="font-size:10.5pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#04488D">Head of Radiological Protection<br>
</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#04488D">Technical & Safety Support Department<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#04488D">EDF Nuclear Operations<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Sizewell B Power Station, Suffolk, United Kingdom IP16 4UR</span><span style="color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#7F7F7F">T:<b>
</b>(+44) (0)1728 65 3750 (Internal 718 3750)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Proud Sponsors of Alzheimer\u2019s Society<o:p></o:p></span></p>
<p class="MsoNormal"><img width="188" height="71" style="width:1.9583in;height:.743in" id="x_Picture_x0020_3" src="cid:image002.jpg@01DBE152.C96292D0" alt="7BE33704"><span style="font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><a href="https://www.alzheimers.org.uk/" target="_blank"><span style="color:blue">https://www.alzheimers.org.uk/</span></a><o:p></o:p></p>
</div>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US" style="font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-family:"Calibri",sans-serif"> Global <global-bounces@list.rpalara.org>
<b>On Behalf Of </b>Rhonda Bewley via Global<br>
<b>Sent:</b> 19 June 2025 19:23<br>
<b>To:</b> Sotomayor, Amy <asotoma@entergy.com>; global@list.rpalara.org<br>
<b>Subject:</b> Re: [Global] [EXTERNAL] Benchmark - Micron size for Fuel Pool Purification Filtration<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p align="right" style="margin:5.0pt;text-align:right"><span lang="EN-US" style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#A80000">Internal Use Only<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">At Wolf Creek we use one size when vacuuming with the 260 we use a 2 micron ,and for water clarity the 600 we use a 5 micron filter but it depends on water clarity be have used as low as 0.2 micron.
Our spent fuel filters during outage are 20 micron and 0.45 micron online</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">Have a great day,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">Rhonda Bewley</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">Wolf Creek ALARA</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">620-364-8831 ext. 8763</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"><img border="0" width="70" height="70" style="width:.7291in;height:.7291in" id="Picture_x0020_1" src="cid:image003.png@01DBE152.C96292D0"></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span><span lang="EN-US"><o:p></o:p></span></p>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US" style="font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-family:"Calibri",sans-serif"> Global <<a href="mailto:global-bounces@list.rpalara.org">global-bounces@list.rpalara.org</a>>
<b>On Behalf Of </b>Sotomayor, Amy via Global<br>
<b>Sent:</b> Thursday, June 19, 2025 12:14 PM<br>
<b>To:</b> <a href="mailto:global@list.rpalara.org">global@list.rpalara.org</a><br>
<b>Subject:</b> [EXTERNAL][Global] Benchmark - Micron size for Fuel Pool Purification Filtration</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<div>
<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span lang="EN-US" style="font-size:1.0pt;color:white">Team, I have an action to: Perform an informal benchmark with industry peers to determine industry best practices in relations to the micron size used
for Fuel Pool Purification filtering. Currently WF3 uses a 20-micron filter for Fuel Pool</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span lang="EN-US" style="font-size:1.0pt;color:white">ZjQcmQRYFpfptBannerStart</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="100%" style="width:100.0%;border-radius:4px">
<tbody>
<tr>
<td style="padding:0cm 0cm 7.5pt 0cm">
<table class="MsoNormalTable" border="1" cellspacing="0" cellpadding="0" width="100%" style="width:100.0%;background:#D0D8DC;border:none;border-top:solid #90A4AE 3.0pt">
<tbody>
<tr>
<td valign="top" style="border:none;padding:0cm 6.0pt 4.5pt 6.0pt">
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" align="left">
<tbody>
<tr>
<td style="padding:0cm 6.0pt 3.0pt 6.0pt">
<p class="MsoNormal" style="line-height:15.0pt"><b><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black">This Message Is From an External Sender
</span></b><o:p></o:p></p>
</td>
</tr>
<tr>
<td style="padding:0cm 6.0pt 3.0pt 6.0pt">
<p class="MsoNormal" style="line-height:12.0pt"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black">This message came from outside your organization.
</span><o:p></o:p></p>
</td>
</tr>
</tbody>
</table>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" align="right">
<tbody>
<tr>
<td style="padding:0cm 0cm 3.0pt 0cm">
<p class="MsoNormal" style="line-height:27.0pt"><span style="font-size:10.5pt"> <a href="https://us-phishalarm-ewt.proofpoint.com/EWT/v1/NF9KyNs0!XkBx59Ymc97eZoLc-xIUc5rOf96CPlQ3TxZHsFTB7J-FG_HYmbPcHcGHVd7o7UvzZkyPXZYpmf0WJVjVBgbvDDx9bTKgOPCvE0B7993_LMzp98wO3fVbtDjAW_fvUbrKitaF0OGtkA$" target="_blank"><strong><span style="font-family:"Arial",sans-serif;color:black;border:solid #666666 1.0pt;padding:5.0pt;font-weight:normal;text-decoration:none"> Report Suspicious </span></strong></a> \u200c
</span><o:p></o:p></p>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
<div>
<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span lang="EN-US" style="font-size:1.0pt;color:white">ZjQcmQRYFpfptBannerEnd</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;mso-ligatures:standardcontextual">Team,
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;mso-ligatures:standardcontextual"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;mso-ligatures:standardcontextual">I have an action to:</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;mso-ligatures:standardcontextual"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;mso-ligatures:standardcontextual">Perform an informal benchmark with industry peers to determine industry best practices in relations to the micron size used for Fuel Pool Purification filtering.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;mso-ligatures:standardcontextual"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;mso-ligatures:standardcontextual">Currently WF3 uses a 20-micron filter for Fuel Pool Purification filtering.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;mso-ligatures:standardcontextual"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;mso-ligatures:standardcontextual">Any/all information you may have would be greatly appreciated.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;mso-ligatures:standardcontextual"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;mso-ligatures:standardcontextual">Thanks,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;mso-ligatures:standardcontextual"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-ligatures:standardcontextual"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:14.0pt;font-family:Harrington;color:#0070C0">Amy Sotomayor</span></b><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:14.0pt;font-family:Harrington;color:#0070C0">RP Supervisor \u2013 Waterford 3</span></b><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:14.0pt;font-family:Harrington;color:#0070C0">U.S. WIN Region IV Public Outreach Chair</span></b><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:14.0pt;font-family:Harrington;color:#0070C0">504-739-7500 (work)</span></b><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:14.0pt;font-family:Harrington;color:#0070C0">479-223-0525 (cell)</span></b><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-ligatures:standardcontextual"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">This message is intended for the exclusive use of the intended addressee. If you have received this message in error or are not the intended addressee or his or her authorized agent, please notify
me immediately by e-mail, discard any paper copies and delete all electronic files of this message.
</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
</div>
<br><br>
<p style="font-family:Arial;font-size:14px">
This e-mail, and any attachments, is confidential and for the use of the addressee only. If you are not the intended recipient, please telephone +44 (0) 1355 846000. We do not accept legal responsibility for this e-mail or any viruses. All e-mails sent and received by us are monitored. Contracts cannot be concluded with us by e-mail.<br>
<br>This message has been sent from EDF Energy Nuclear Generation Ltd, a company registered in England and Wales No. 03076445, with registered office at Javelin House, Building 1420 Charlton Court, Gloucester Business Park, Gloucester GL3 4AE. </p></body></html>