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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Callaway has not made these repairs
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Aaron Enloe<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Radiation Protection<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">573-592-9286<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">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Global <global-bounces@list.rpalara.org>
<b>On Behalf Of </b>Garza, Alexander M<br>
<b>Sent:</b> Friday, September 4, 2020 11:42 AM<br>
<b>To:</b> global@list.rpalara.org<br>
<b>Subject:</b> [EXTERNAL] [Global] Shield Building Mitigation - Dose Reduction Opportunities<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:13.5pt;font-family:"Arial",sans-serif;color:crimson">EXTERNAL SENDER</span></b>
<b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#070707">STOP.THINK.QUESTION.</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#070707"><br>
Verify unexpected requests before opening links or attachments.</span><o:p></o:p></p>
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<p><span style="font-family:"Calibri",sans-serif;color:black">Davis Besse has been performing Shield Building Concrete mitigation for the past few years due to Laminar cracks discovered on the shield building. Dose accumulated per individual is low level (gamma
& neutron) and dose rates vary based on location where the excavating of concrete is being removed.</span><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"> </span><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">Work Scope includes scaffolding to work location, excavation of concrete, cleaning /replacing rebar and re-installing concrete to prevent any additional propagation of cracks.
</span><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"> </span><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p><b><span style="font-family:"Calibri",sans-serif;color:black">The goal of this question will be to ask if there are any other Nuclear facilities performing similar
</span></b><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p><b><span style="font-family:"Calibri",sans-serif;color:black">repairs ? What innovative / creative tools or techniques are being used to reduce personnel exposure?</span></b><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"> </span><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p><b><span style="font-family:"Calibri",sans-serif;color:black"> </span></b><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p><b><span style="font-family:"Calibri",sans-serif;color:black">Current Dose Reduction Techniques Communicated / Implemented
</span></b><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"> <o:p></o:p></span></p>
<p style="margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:10.0pt;font-family:Symbol;color:black"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-family:"Calibri",sans-serif;color:black">Utilize only necessary personnel to perform work.</span><span style="font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p style="margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:10.0pt;font-family:Symbol;color:black"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Minimize time in elevated dose work areas (Excavated concrete areas)</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p style="margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:10.0pt;font-family:Symbol;color:black"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Maintain distance from the shield building as practical when not actively performing work (Excavated concrete areas).</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p style="margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:10.0pt;font-family:Symbol;color:black"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Different concrete forms are being utilized that will reduce the effort and time to install and remove forms thereby reducing personnel exposure.<o:p></o:p></span></p>
<p style="margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:10.0pt;font-family:Symbol;color:black"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Multiple tooling has been used to remove concrete / clean rebar.
<o:p></o:p></span></p>
<p style="margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:10.0pt;font-family:Symbol;color:black"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">A crane has been installed on top of the shield building to increase efficiency for movement of material.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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