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<p class="MsoNormal">We at Braidwood just performed core barrel lift last week. See info below. No baffle bolt activities performed yet on either unit…….Thx Joe<o:p></o:p></p>
<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>Garza, Alexander M<br>
<b>Sent:</b> Thursday, April 22, 2021 11:48 AM<br>
<b>To:</b> Global PWR ALARA <global@list.rpalara.org><br>
<b>Subject:</b> [EXTERNAL] [Global] Benchmark Questions: Core Barrel Lift & Baffle Bolt Inspection<o:p></o:p></p>
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<p><em><b><span style="font-family:"Calibri",sans-serif;color:yellow">EXTERNAL MAIL. Do not click links or open attachments from unknown senders or unexpected Email.</span></b></em><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="color:black">During 1R22, Davis-Besse will be performing core barrel lift for ISI and baffle bolt inspection. We are benchmarking other site for any lessons learned from these two evolutions. Below
are questions related to these two activities. <o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:.5in;text-indent:-.25in"><span style="color:black">1.</span><span style="font-size:7.0pt;font-family:"Times New Roman",serif;color:black">
</span><span style="color:black">Core barrel lift <o:p></o:p></span></p>
<ul type="disc">
<li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt">What is the sequence of moves for your plenum when the core barrel requires removal? Does it involve multiple lifts of the plenum in preparation for the core barrel move? </span><span style="font-size:12.0pt;color:windowtext">No
plenum moves required</span><span style="font-size:12.0pt"><o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt">How much dose was accumulated for the core barrel lift? </span><span style="font-size:12.0pt;color:windowtext">See attached PJR</span><span style="font-size:12.0pt"><o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt">What dose rates were observed during lift? </span><span style="font-size:12.0pt;color:windowtext">On removal polar crane operator seen 1100mr/hr. We repositioned/added some more lead on the cab for reinstall (as previously we
had not seen dose rates that high) and registered 400mr/hr. We did have a RDS-31 on top of the crane and highest seen was 3500mr/hr. Had that up there in event crane broke down and a repair crew had to go up there and fix something. </span><span style="font-size:12.0pt"><o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt">Were cameras used for lift by reactor services? </span><span style="font-size:12.0pt;color:windowtext">Yes RXS does the move remotely with cameras in a room outside cnmt in the FHB.
</span><span style="font-size:12.0pt"><o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt">Who moves the core barrel at your site? In house or Vendor? </span><span style="font-size:12.0pt;color:windowtext">Rxs, only individuals in the area were 2 polar crane operators and 2 line tenders positioned outside the hatch
in the FHB</span><span style="font-size:12.0pt"><o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt">Would you provide a copy of the core barrel move RWP? </span><span style="font-size:12.0pt;color:windowtext">Attached
</span><span style="font-size:12.0pt"><br>
<br>
<o:p></o:p></span></li></ul>
<p class="MsoListParagraph" style="margin-left:.5in;text-indent:-.25in"><span style="color:black">2.</span><span style="font-size:7.0pt;font-family:"Times New Roman",serif;color:black">
</span><span style="color:black">Baffle Bolt inspection <o:p></o:p></span></p>
<ul type="disc">
<li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo2">
<span style="font-size:12.0pt">What Vendor performed the baffle bolt inspection? How was their performance from a radiological perspective? <o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo2">
<span style="font-size:12.0pt">How much dose was accumulated for baffle bolt inspections? <o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo2">
<span style="font-size:12.0pt">What were the results of inspection? If repairs were required, how much dose was accumulated and time or was it schedule for a future outage? <o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo2">
<span style="font-size:12.0pt">What were the dose rates and contamination levels on inspection equipment? <o:p></o:p></span></li></ul>
<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="color:black">Site Contact: <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="color:black">Jim Lochotzki <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="color:black">Staff Nuclear Engineering Specialist <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="color:black">Radiation Protection Section <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="color:black">Davis-Besse Nuclear Power Station <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="color:black">Energy Harbor <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="color:black">419-321-7329 <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="color:black"><a href="mailto:jalochotzki@energyharbor.com">jalochotzki@energyharbor.com</a> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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