March 17, Radiation Shielding Update and Guidance Don Parry, MHP, CHP Region I Physicist Michigan Department of Community Health Radiation Safety Section

March 17, Regulations Regarding Radiation Shielding Plan Reviews  Rule 331(2) of the current Ionizing Radiation Rules (Promulgated in 1975) states that shielding is subject to design approval by the department  Proposed new rule states that prior to construction, the floor plans, shielding specifications and equipment arrangement of new installations, or modifications of existing installations, utilizing ionizing radiation machines shall be submitted to the department for review and approval.

March 17, New Standards Regarding Shielding Design

March 17, Radiation Shielding Update and Guidance  Form BHS/HFS 852 – Information Required for a Radiation Shielding Plan Review  Available at  Web Site includes guidance on shielding:  Radiographic or RF rooms  Mammography Rooms  Computed Tomography Rooms  Linear Accelerator Vaults  Additional Guidance

March 17, Radiation Shielding Update and Guidance Recent changes in Form BHS/HFS 852 – Requests CON number if available

March 17, Radiation Shielding Update and Guidance Recent changes in Form BHS/HFS 852 – Includes check boxes for required items

March 17, Radiation Shielding Update and Guidance  Form BHS/HFS 852 – Information Required for a Radiation Shielding Plan Review  Be sure to include all requested information including:  Description of occupancy of adjoining areas including above or below  Description of floor and ceiling construction including minimum concrete thickness and density.

March 17, Radiation Shielding Update and Guidance  Plan Reviews  Plans should be submitted prior to construction!  Construction of an x-ray room without an approved plan may cause shielding modifications to be done after the room is constructed

March 17, Radiation Shielding Update and Guidance  Certificate of Need  Equipment that requires a CON will not be registered until plans have been reviewed by the Radiation Safety Section.  This includes mobile CT scanners used while fixed units are being installed  Mobile scanners need to submit a site plan showing the location of the scanner.

March 17, Radiation Shielding Update and Guidance

March 17, Radiation Shielding Update and Guidance  Examples  No Occupancy above or below  On Slab  Shielding should be floor to 7’  1/16 inch thick secondary, 1/8 inch thick primary 1/8 inch lead (blue) Leakage Scatter 1/16 inch lead (red)

March 17, Radiation Shielding Update and Guidance Examples CT with adjacent Multi Story Building May need additional shielding on outside wall Adjacent Multi Story Building Occupied uncontrolled space in adjacent building

March 17, Radiation Shielding Update and Guidance Floors Need to use minimum thickness of concrete floor in shielding calculations Need to know density of concrete (147 lbs/ft 3 standard )

March 17, Radiation Shielding Update and Guidance Examples Occupied space below Need 1/16 inch thick lead on floor with 1/8 thick lead under table Floor shielding should overlap wall shielding

March 17, Radiation Shielding Update and Guidance Examples Exposure switch location Adjacent Multi Story Building Switch needs to be arms length from first scattered and leakage radiation Switch Location

March 17, Radiation Shielding Update and Guidance  Summary  Submit shielding plans to the Radiation Safety Section for design approval prior to construction!  Include all information requested on form BHS/HFS 852 including CON number if applicable.  Equipment that requires a Certificate of Need, including mobile CT scanners, will not be registered until a plan is reviewed  Be sure to consider areas above and below the x-ray room when designing shielding.

March 17, Contact Information Contact InformationHeadquarters: Radiation Safety Section Michigan Department of Community Health P.O. Box Lansing, Michigan Phone: (517) Fax: (517) Visitor/delivery address: 1st Floor, Ottawa Building 611 W. Ottawa Street Lansing, Michigan District Office Radiation Safety Section Michigan Department of Community Health Van Dyke, Suite 375 Sterling Heights, Michigan Phone: (586) Fax: (586)