[ RadSafe ] Question on the exemption of material as NORMinMississippi.

Thu May 31 03:22:23 CDT 2007

Amy.

Although the levels are somewhat different (about 5 times bigger), you may find an argument in page 18  (3.3 mixtures) of the IAEA's Safety report series 44 on exclusion, exemption and clearance.

In this document to compare the level for each separate isotope is indicated for natural origin radioisotopes.

Juan C. Mora
PD: As always, sorry cause my english.

-----Mensaje original-----
De: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] En nombre de Mitchell Davis
Enviado el: jueves, 31 de mayo de 2007 7:25
Para: Amy_Jones at URSCorp.com; radsafe at radlab.nl
Asunto: RE: [ RadSafe ] Question on the exemption of material as NORMinMississippi. 

The exemption applies to both isotopes and not collectively.  If EITHER (not the combined total) exceed 5 pCi/gm, then the exemption is not satisfied.

Mitchell Davis, RRPT, RN
Health Physicist
Midland TX
mitchrn at suddenlink.net

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On Behalf Of Amy_Jones at URSCorp.com
Sent: Wednesday, May 30, 2007 2:29 PM
To: radsafe at radlab.nl
Subject: [ RadSafe ] Question on the exemption of material as NORM inMississippi. 

In doing NORM survey work we have encountered material that contains both
Radium 226 and Radium 228.   The Exemption section of the Mississippi
regulations on NORM (excerpted below) states material is exempt if it
contains less than 5 pCi/g of Ra-226 or Ra-228.    The question has come up
do we compare the isotopes individually to the 5 pCi/g concentration, or do we sum the two concentrations and then compare it to the criteria.  We have looked at this both ways and have yet to come to a satisfactory conclusion.
Has anyone else encountered this question?

   Thanks

 Title 15, Part III, Subpart 78 Chapter 01Regulations for Control of Radiation in Mississippi, 1100 Licensing of Naturally Occurring Radioactive Materials (NORM )

1100.04 Exemptions.
1. Persons who receive, possess, use, process, transfer, transport, store, distribute, and dispose of NORM are exempt from the requirements of these regulations if:
a. The materials contain, or are contaminated at, concentrations less than
5 picocuries per gram of radium - 226 or radium - 228 above background; or, concentrations less than 30 picocuries per gram (1.11
kBq/kg) of technologically enhanced radium-226 or radium-228, averaged over any 100 square meters, provided the radon emanation rate does not exceed 20 picocuries (740 mBq) per square meter per second, or 150 picocuries per gram (5.55 kBq/kg) of any other NORM radionuclide, provided that these concentrations are not exceeded at any time; or

Amy Jones, RRPT
URS Corporation
756 East Winchester Street Suite 400
Salt Lake City UT  84107
801-904-4000 (main)
801-904-4023 (direct)
801-913-5199 (cell)
801-904-4100 (fax)

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