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<p class="MsoNormal">We started using the Ryobi Cordless telescoping power scrubber, Quick Decon Solution, and this outage we used about 10 gal of 5% Hydrogen Peroxide split between the upper and lower cavity. I attached the smears during head set and the
post decon surveys. We have used them for a few years now and they have been great.
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ligatures:none">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ligatures:none"> Global <global-bounces@list.rpalara.org>
<b>On Behalf Of </b>Coughlin, Joseph J: (Constellation Nuclear) via Global<br>
<b>Sent:</b> Thursday, November 6, 2025 5:58 AM<br>
<b>To:</b> Michael J Griffin <mjgriffin@aep.com>; global@list.rpalara.org<br>
<b>Subject:</b> Re: [Global] [EXTERNAL] Request for Recommendations Cavity Decontamination Equipment and Techniques<o:p></o:p></span></p>
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<strong><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:white;mso-ligatures:none">EXTERNAL - STOP & THINK</span></strong><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:white;mso-ligatures:none"> before opening links and
attachments. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Morning Mike,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">We use a similar pressure washer but have a rotary spray surface cleaner attachment to use vs traditional standard tip. This is not exact one we use but similar. Takes some force to hold to walls but gets
a lot more surface area then just the tip. Hope this helpsThx Joe<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ligatures:none">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ligatures:none"> Global <</span><a href="mailto:global-bounces@list.rpalara.org"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ligatures:none">global-bounces@list.rpalara.org</span></a><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ligatures:none">>
<b>On Behalf Of </b>Michael J Griffin via Global<br>
<b>Sent:</b> Tuesday, November 4, 2025 2:22 PM<br>
<b>To:</b> </span><a href="mailto:global@list.rpalara.org"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ligatures:none">global@list.rpalara.org</span></a><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ligatures:none"><br>
<b>Subject:</b> [EXTERNAL][Global] Request for Recommendations Cavity Decontamination Equipment and Techniques<o:p></o:p></span></p>
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<p><em><b><span style="font-size:10.0pt;font-family:"Aptos",sans-serif;color:yellow">EXTERNAL MAIL. Do not click links or open attachments from unknown senders or unexpected Email.</span></b></em><span style="font-size:10.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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<p><strong><span style="font-family:"Aptos",sans-serif">Subject: Request for Recommendations Cavity Decontamination Equipment and Techniques</span></strong><o:p></o:p></p>
<p>We are currently evaluating opportunities to enhance the efficiency and effectiveness of our cavity decontamination process. At present, we utilize a 3500 PSI pressure washer with a standard tip to decon the cavity walls and floor. For optimal performance,
the tip must be positioned within 2 inches of the surface; otherwise, multiple passes (typically 46) are required to achieve acceptable results.<o:p></o:p></p>
<p>This limitation significantly impacts productivity, particularly when cleaning vertical surfaces up to 6 feet high and approximately 60 feet in length, which can take several hours. Additionally, the cavity floor presents challenges due to the presence of
NI detector covers and nozzle access covers, which are elevated several inches above the main floor. These obstructions prevent the use of conventional floor-cleaning equipment such as buffers or scrubbers.<o:p></o:p></p>
<p>We are seeking input from other sites or teams regarding equipment, pressure washer tips, and attachments that have proven effective in similar conditions. Our goal is to improve decon efficiency, reduce time, and minimize dose.<o:p></o:p></p>
<p>Any recommendations or lessons learned would be greatly appreciated.<o:p></o:p></p>
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<p class="MsoNormal" style="line-height:105%"><b><span style="font-size:9.5pt;line-height:105%;font-family:"Arial",sans-serif;color:#C00000;text-transform:uppercase">Michael J. Griffin</span></b><span style="font-size:9.5pt;line-height:105%;font-family:"Arial",sans-serif;color:#1F497D;text-transform:uppercase">
</span><span style="font-size:9.5pt;line-height:105%;font-family:"Arial",sans-serif;color:#595959;text-transform:uppercase">|
</span><b><span style="font-size:9.5pt;line-height:105%;font-family:"Arial",sans-serif;color:black;text-transform:uppercase">ALARA planner</span></b><b><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:gray;text-transform:uppercase">
</span></b><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:gray;text-transform:uppercase"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:105%"><a href="mailto:mjgriffin@aep.com"><span style="font-size:8.5pt;line-height:105%;font-family:"Arial",sans-serif;color:#0563C1;text-transform:uppercase">mjgriffin@aep.com</span></a><span style="font-size:8.5pt;line-height:105%;font-family:"Arial",sans-serif;color:gray;text-transform:uppercase">
| </span><span style="font-size:8.5pt;line-height:105%;font-family:"Arial",sans-serif;color:gray"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:105%"><span style="font-size:8.5pt;line-height:105%;font-family:"Arial",sans-serif;color:#404040;text-transform:uppercase">cook nuclear plant<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:105%"><span style="font-size:8.5pt;line-height:105%;font-family:"Arial",sans-serif;color:#404040;text-transform:uppercase">1 Cook place, Bridgman, MI 49106
<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:105%"><span style="font-size:8.5pt;line-height:105%;font-family:"Arial",sans-serif;color:#404040;text-transform:uppercase">| 269-465-5901 *7547 | cell 269-449-2437</span><span style="font-size:8.5pt;line-height:105%;font-family:"Arial",sans-serif;color:gray;text-transform:uppercase"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-ligatures:none">This Email message and any attachment may contain information that is proprietary, legally privileged, confidential and/or subject to copyright belonging to Constellation Energy Corporation or its affiliates
("Constellation"). This Email is intended solely for the use of the person(s) to which it is addressed. If you are not an intended recipient, or the employee or agent responsible for delivery of this Email to the intended recipient(s), you are hereby notified
that any dissemination, distribution or copying of this Email is strictly prohibited. If you have received this message in error, please immediately notify the sender and permanently delete this Email and any copies. Constellation policies expressly prohibit
employees from making defamatory or offensive statements and infringing any copyright or any other legal right by Email communication. Constellation will not accept any liability in respect of such communications. -CEGIP
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