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RE: DCGL Values and ALARA

To: "'radsafe@romulus.ehs.uiuc.edu'" <radsafe@romulus.ehs.uiuc.edu>
Subject: RE: DCGL Values and ALARA
From: "Nardi, A. Joseph" <nardiaj@westinghouse.com>
Date: Fri, 17 Sep 1999 17:47:47 -0400
If your Decommissioning Plan has been approved by the NRC and incorporates
the approval to utilize the Reg Guide 1.86 values, then they become your
DCGL's.  You do not have to mix in the new regs and the 25 mrem limit if
your approval does not require it.


A. Joseph Nardi
Supervisory Engineer
Environment, Health and Safety
Westinghouse Electric Company
Phone: (412) 374-4652
Email: nardiaj@westinghouse.com

> ----------
> From: 	Johannes Strydom[SMTP:fritz.strydom@ors.gatech.edu]
> Reply To: 	radsafe@romulus.ehs.uiuc.edu
> Sent: 	Friday, September 17, 1999 3:01 PM
> To: 	Multiple recipients of list
> Subject: 	DCGL Values and ALARA
> 
> This is a multi-part message in MIME format.
> 
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> 
> Radsafers,
> 
> As many of you may be aware, we are in the process of decommissioning our
> research reactor here at Georgia Tech.  We are decommissioning to Reg
> Guide
> 1.86 levels (Not MARSIMM).
> 
> We are trying to find a method by which we can determine in what areas our
> money would best be spent to perform further decontamination after 1.86
> levels have been met.  The NRC put out a working Reg guide on ALARA
> Analysis
> that outlines a method to perform a determination on when further
> decontamination would be economically reasonable.  In order to use their
> equations, it is necessary to have DCGL values for both surface
> contamination and volumetric contamination.
> 
> The DCGL is the average concentration of residual activity that would give
> a
> dose of 25 mrem/yr to the average member of the population in units of
> activity per unit area for buildings or activity per unit volume for
> soils.
> 
> Does anyone know of a place where (or has someone calculated) I can get
> generic DCGL (Derived Concentration Guideline) values for common
> radionuclides in such things as concrete, building surface contamination,
> soil, etc for a building that is decommissioned to free release.  From
> what
> I have read, it seems that to get these numbers, an analysis using
> software
> such as Resrad needs to be done.  We can certainly do this if necessary,
> but
> I was wondering if there was a generic table somewhere?
> 
> Thank you.
> 
> ------------------------------------------------
> Johannes "Fritz" Strydom
> Health Physicist
> Georgia Institute of Technology
> (404) 894-3605
> (404) 894-9325 fax
> fritz.strydom@ors.gatech.edu <mailto:fritz.strydom@ors.gatech.edu>
> 
> 
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> <div class=3DSection1>
> 
> <p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
> color=3Dblack
> face=3DArial><span =
> style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
> Arial'>Radsafers,<o:p></o:p></span></font></span></p>
> 
> <p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
> color=3Dblack
> face=3DArial><span =
> style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
> Arial'><![if =
> !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></font></span></p>
> 
> <p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
> color=3Dblack
> face=3DArial><span =
> style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
> Arial'>As many of you may be aware, we are in the process of =
> decommissioning
> our research reactor here at Georgia Tech.<span style=3D"mso-spacerun: =
> yes">=A0
> </span>We are decommissioning to Reg Guide 1.86 levels (Not =
> MARSIMM).<o:p></o:p></span></font></span></p>
> 
> <p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
> color=3Dblack
> face=3DArial><span =
> style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
> Arial'><![if =
> !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></font></span></p>
> 
> <p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
> color=3Dblack
> face=3DArial><span =
> style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
> Arial'>We are trying to find a method by which we can determine in what =
> areas our
> money would best be spent to perform further decontamination after 1.86 =
> levels
> have been met.<span style=3D"mso-spacerun: yes">=A0 </span>The NRC put =
> out a
> working Reg guide on ALARA Analysis that outlines a method to perform a
> determination on when further decontamination would be economically =
> reasonable.<span
> style=3D"mso-spacerun: yes">=A0 </span>In order to use their equations, =
> it is
> necessary to have DCGL values for both surface contamination and =
> volumetric
> contamination.<o:p></o:p></span></font></span></p>
> 
> <p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
> color=3Dblack
> face=3DArial><span =
> style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
> Arial'><![if =
> !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></font></span></p>
> 
> <p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
> color=3Dblack
> face=3DArial><span =
> style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
> Arial'>The DCGL is the average concentration of residual activity that =
> would
> give a dose of 25 mrem/yr to the average member of the population in =
> units of
> activity per unit area for buildings or activity per unit volume for =
> soils.<o:p></o:p></span></font></span></p>
> 
> <p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
> color=3Dblack
> face=3DArial><span =
> style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
> Arial'><![if =
> !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></font></span></p>
> 
> <p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
> color=3Dblack
> face=3DArial><span =
> style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
> Arial'>Does anyone know of a place where (or has someone calculated) I =
> can get
> generic DCGL (Derived Concentration Guideline) values for common =
> radionuclides
> in such things as concrete, building surface contamination, soil, etc =
> for a
> building that is decommissioned to free release.<span =
> style=3D"mso-spacerun:
> yes">=A0 </span>From what I have read, it seems that to get these =
> numbers, an
> analysis using software such as Resrad needs to be done.<span
> style=3D"mso-spacerun: yes">=A0 </span>We can certainly do this if =
> necessary, but I
> was wondering if there was a generic table =
> somewhere?<o:p></o:p></span></font></span></p>
> 
> <p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
> color=3Dblack
> face=3DArial><span =
> style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
> Arial'><![if =
> !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></font></span></p>
> 
> <p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
> color=3Dblack
> face=3DArial><span =
> style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
> Arial'>Thank you.<o:p></o:p></span></font></span></p>
> 
> <p class=3DMsoNormal><span class=3DEmailStyle15><font size=3D2 =
> color=3Dblack
> face=3DArial><span =
> style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
> Arial'><![if =
> !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></font></span></p>
> 
> <p class=3DMsoAutoSig><!--[if supportFields]><font color=3Dblack><span=20
> style=3D'color:black'><span =
> style=3D'mso-element:field-begin'></span><span=20
> style=3D"mso-spacerun: yes">=A0</span>AUTOTEXTLIST \s &quot;E-mail =
> Signature&quot; <span=20
> style=3D'mso-element:field-separator'></span></span></font><![endif]--><f=
> ont
> color=3Dblack><span =
> style=3D'color:black'>------------------------------------------------</s=
> pan></font><font
> color=3Dblack><span =
> style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
> /p>
> 
> <p class=3DMsoAutoSig><font size=3D3 color=3Dblack face=3D"Times New =
> Roman"><span
> style=3D'font-size:12.0pt;color:black'>Johannes &quot;Fritz&quot; =
> Strydom</span></font><font
> color=3Dblack><span =
> style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
> /p>
> 
> <p class=3DMsoAutoSig><font size=3D3 color=3Dblack face=3D"Times New =
> Roman"><span
> style=3D'font-size:12.0pt;color:black'>Health =
> Physicist</span></font><font
> color=3Dblack><span =
> style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
> /p>
> 
> <p class=3DMsoAutoSig><font size=3D3 color=3Dblack face=3D"Times New =
> Roman"><span
> style=3D'font-size:12.0pt;color:black'>Georgia Institute of =
> Technology</span></font><font
> color=3Dblack><span =
> style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
> /p>
> 
> <p class=3DMsoAutoSig><font size=3D3 color=3Dblack face=3D"Times New =
> Roman"><span
> style=3D'font-size:12.0pt;color:black'>(404) 894-3605</span></font><font
> color=3Dblack><span =
> style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
> /p>
> 
> <p class=3DMsoAutoSig><font size=3D3 color=3Dblack face=3D"Times New =
> Roman"><span
> style=3D'font-size:12.0pt;color:black'>(404) 894-9325 =
> fax</span></font><font
> color=3Dblack><span =
> style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
> /p>
> 
> <p class=3DMsoAutoSig><font size=3D3 color=3Dblack face=3D"Times New =
> Roman"><span
> style=3D'font-size:12.0pt;color:black'><a
> href=3D"mailto:fritz.strydom@ors.gatech.edu";>fritz.strydom@ors.gatech.edu=
> </a></span></font><font
> color=3Dblack><span =
> style=3D'color:black;mso-color-alt:windowtext'><o:p></o:p></span></font><=
> /p>
> 
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> color=3Dblack><span =
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> /p>
> 
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