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information Notice Number 20 <br /> (November 1997) <br /> For Florida Radiation Machine Registrants <br />� Department of Health, Bureau of Radiation Controi <br /> TYPICAL SHIELDlNG REQUIREMENTS FOR VETERIPIARY REGlSTRANTS <br /> The State of Florida administrative rules require radiation machine registrants to adequately shield the <br /> x-ray beams and scattered radiation produced by their machines. The purpose of this requirement is to <br /> ensure machine operators and members of the general public are not unnecessarily exposed to radiation <br /> and are kept below their legal dose limits. Shielding requirements will be determined by this potential <br />' exposure to humans and must take iRto consideration occupancy factors, distance, work load, energy and <br /> direction of the primary beam, and other related factors. <br /> Generalty for this type of x-ray machine installation, the following guidance applies: <br />� 1. Preferably, a protected position is provided for the operator. When this is not possible, <br /> operators must be able to stand at least six feet away from the primary source of scatter(the <br /> animal being radiographed), outside the path of the primary beam, and wear a protective <br />� apron. - <br /> 2. Shielding is necessary for inside walls when <br /> a. the primary beam will be directed toward it without a beam block to intercept, or <br /> b. normatly occupied spaces are within eight (8) feet of the source of scatter. <br /> 3. Sfiielding is not required for outside walls or areas without human occupancy, such as store <br /> rooms, bathrooms, kennels, etc. � <br /> When a pratected position is provided, one-sixteenth (1/16) inch lead equivalent shielding would be <br /> required to a height of seven (7) feet. No additional shielding beyond standard drywall construction is <br /> normally required on the other walls except in special cases, such as when an office worker is in close <br /> proximity to the x-ray_room or a wall of the x-ray room is shared with another tenant. I�Jadtli#iott�i� <br /> <ti�i�t^['=+^-'�:s:-n:' �N':";>'S'aN�tnw°�_<.r.i:r_ �,sis.,T�... - :��:,:�,�;r.�e.Tr,.�"'��2_g--r.�. F _ . _�+Y=,.:a�a..'»� <br /> ,�s�iietc�i�g�,is�,vlrar�art��ct�::any.;�cfer�se��material;:�suc`hKas=.an�;add�#ic�'r.',ia!�thickrtess.of:•�liywail;;i�rbs��sed-to <br /> ��,� - � - � . :. . '� _..�.t,�,.,�.�:�.�.;;��._. .Sc���►.t-� <br /> attenuate�thE�Fscai#ered.radiat�or�,-:? � �� � � /�jl '� P5� 6� ���l,t�y�/ "' �-. '�' <br /> ��;,��-��-,,.��,:':'�x.���.��:.-�::�;:.�:,��.�,.r.=�:�.:�=�- /�/ <br /> Shielding plan review and/or approval is not required by this office unless the energies used exceed 200 ��'P�I�� <br /> kVp. High volume offices (greater than 1000 mA minutes per week) or offices with fluoroscopic or special � <br /> function machines should consider having their shielding planneci by a licensed medical physicist. The <br /> Bureau of Radiation Control will inspect each facility that uses a radiation machine and require adequate <br /> shielding to protect operators and the public. <br /> If you have questions or need guidance, please Contact this o�ce at: <br /> Department of Health <br /> Bureau of Radiation Control, Radiation Machine Program <br /> 705 Wells Rd Ste 300, Orange Park, Florida 32073 <br /> Phone: (904) 278-5730 Fax: (904) 278-5737 <br /> www.mvFloridaEH.com/radiation <br />