Generally we post the area as a Radioactive Material Area. If the total activity is less than that requiring posting per 10 CFR 20, then we may take this exception to posting the area (but usually we just post it).
If the only detectable isotope is Cs-137, you may be able to demonstrate that the activity is due to fallout and is thus not "licensed material." We have performed sampling outside the site to establish baseline soil Cesium levels and have used this method for very low levels of detectable Cs-137 in the top layer of soil. Stephen J Holmes Sr. Plant Health Physicist RE Ginna NPP Constellation Energy Nuclear Group [email protected] 585-771-3577; 585-545-1661 (cell) From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, December 01, 2011 7:57 PM To: [email protected] Subject: Powernet: Dirty question for you... We have several soil piles with low, but detectable (isotopic), levels of contamination. Just to give you an idea of the magnitude, none of the samples would suggest it meets the 49 CFR 173.403 definition of radioactive material but there is quite a large volume. Dresden has always posted and controlled the piles as an RCA. What sort of policies/criteria do you have in place for posting piles of soil with trace amounts of licensed materials? Thanks in advance, Jeffrey J. Cady, CHP, RRPT Mgr RP Technical Support Exelon Nuclear Dresden Station 6500 North Dresden Road Morris, IL 60450-9765 Phone: (815) 416-2719 [email protected]<mailto:[email protected]> ************************************************** This e-mail and any of its attachments may contain Exelon Corporation proprietary information, which is privileged, confidential, or subject to copyright belonging to the Exelon Corporation family of Companies. This e-mail is intended solely for the use of the individual or entity to which it is addressed. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, copying, or action taken in relation to the contents of and attachments to this e-mail is strictly prohibited and may be unlawful. If you have received this e-mail in error, please notify the sender immediately and permanently delete the original and any copy of this e-mail and any printout. Thank You. ************************************************** >>> This e-mail and any attachments are confidential, may contain legal, >>> professional or other privileged information, and are intended solely for >>> the addressee. If you are not the intended recipient, do not use the >>> information in this e-mail in any way, delete this e-mail and notify the >>> sender. CEG-IP1
