March 17, 2006March 17, 2006 11

Radiation Shielding Radiation Shielding Update and GuidanceUpdate and Guidance

Don Parry, MHP, CHPDon Parry, MHP, CHP

Region I PhysicistRegion I Physicist

Michigan Department of Community Michigan Department of Community HealthHealth

Radiation Safety SectionRadiation Safety Section

dparry@michigan.govdparry@michigan.gov

www.michigan.gov/rsswww.michigan.gov/rss

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Regulations Regarding Regulations Regarding Radiation Shielding Plan Radiation Shielding Plan

ReviewsReviews Rule 331(2) of the current Ionizing Radiation Rule 331(2) of the current Ionizing Radiation Rules (Promulgated in 1975) states that Rules (Promulgated in 1975) states that shielding is subject to design approval by the shielding is subject to design approval by the departmentdepartment

Proposed new rule states that prior to Proposed new rule states that prior to construction, the floor plans, shielding construction, the floor plans, shielding specifications and equipment arrangement of specifications and equipment arrangement of new installations, or modifications of existing new installations, or modifications of existing installations, utilizing ionizing radiation installations, utilizing ionizing radiation machines shall be submitted to the department machines shall be submitted to the department for review and approval.for review and approval.

March 17, 2006March 17, 2006 33

New Standards Regarding New Standards Regarding Shielding DesignShielding Design

March 17, 2006March 17, 2006 44

Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

Form BHS/HFS 852 – Information Required Form BHS/HFS 852 – Information Required for a Radiation Shielding Plan Reviewfor a Radiation Shielding Plan Review Available at Available at www.michigan.gov/rsswww.michigan.gov/rss

Web Site includes guidance on shielding:Web Site includes guidance on shielding: Radiographic or RF roomsRadiographic or RF rooms Mammography RoomsMammography Rooms Computed Tomography RoomsComputed Tomography Rooms Linear Accelerator VaultsLinear Accelerator Vaults Additional GuidanceAdditional Guidance

March 17, 2006March 17, 2006 55

Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

Recent changes in Form BHS/HFS 852 – Requests CON number if available

March 17, 2006March 17, 2006 66

Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

Recent changes in Form BHS/HFS 852 – Includes check boxes for required items

March 17, 2006March 17, 2006 77

Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

Form BHS/HFS 852 – Information Form BHS/HFS 852 – Information Required for a Radiation Shielding Plan Required for a Radiation Shielding Plan ReviewReview Be sure to include all requested Be sure to include all requested

information including:information including: Description of occupancy of adjoining areas Description of occupancy of adjoining areas

including above or belowincluding above or below Description of floor and ceiling construction Description of floor and ceiling construction

including minimum concrete thickness and including minimum concrete thickness and density.density.

March 17, 2006March 17, 2006 88

Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

Plan ReviewsPlan Reviews Plans should be submitted prior to Plans should be submitted prior to

construction!construction! Construction of an x-ray room without an Construction of an x-ray room without an

approved plan may cause shielding approved plan may cause shielding modifications to be done after the room is modifications to be done after the room is constructedconstructed

March 17, 2006March 17, 2006 99

Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

Certificate of NeedCertificate of Need Equipment that requires a CON will not be Equipment that requires a CON will not be

registered until plans have been reviewed registered until plans have been reviewed by the Radiation Safety Section.by the Radiation Safety Section.

This includes mobile CT scanners used This includes mobile CT scanners used while fixed units are being installedwhile fixed units are being installed

Mobile scanners need to submit a site plan Mobile scanners need to submit a site plan showing the location of the scanner.showing the location of the scanner.

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Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

March 17, 2006March 17, 2006 1111

Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

ExamplesExamples No Occupancy No Occupancy

above or belowabove or below On SlabOn Slab Shielding Shielding

should be floor should be floor to 7’to 7’

1/16 inch thick 1/16 inch thick secondary, 1/8 secondary, 1/8 inch thick inch thick primaryprimary

6 0 . 0 "

4 2 "

1/8 inch lead(blue)

Leakage

Scatter

1/16 inch lead

(red)

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Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

ExamplesCT with adjacent Multi Story Building

May need additional shielding on outside wall

Adjacent Multi Story Building

Occupied uncontrolled space in adjacent building

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Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

4.5 "

3"FloorsNeed to use

minimum thickness of concrete floor in shielding calculations

Need to know density of concrete (147 lbs/ft3 standard)

March 17, 2006March 17, 2006 1414

Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

6 0 . 0 "

42 "

ExamplesOccupied space below

Need 1/16 inch thick lead on floor with 1/8 thick lead under table

Floor shielding should overlap wall shielding

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Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

Examples

Exposure switch location

Adjacent Multi Story Building

Switch needs to be arms length from first scattered and leakage radiationSwitch

Location

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Radiation Shielding Update Radiation Shielding Update and Guidanceand Guidance

SummarySummary

Submit shielding plans to the Radiation Safety Section for Submit shielding plans to the Radiation Safety Section for design approval design approval prior to constructionprior to construction!!

Include all information requested on form BHS/HFS 852 Include all information requested on form BHS/HFS 852 including CON number if applicable.including CON number if applicable.

Equipment that requires a Certificate of Need, including Equipment that requires a Certificate of Need, including mobile CT scanners, will not be registered until a plan is mobile CT scanners, will not be registered until a plan is reviewedreviewed

Be sure to consider areas above and below the x-ray room Be sure to consider areas above and below the x-ray room

when designing shielding.when designing shielding.

March 17, 2006March 17, 2006 1717

Contact InformationContact InformationHeadquarters:Headquarters:

Radiation Safety SectionRadiation Safety SectionMichigan Department of Community HealthMichigan Department of Community HealthP.O. Box 30664P.O. Box 30664Lansing, Michigan 48909 Lansing, Michigan 48909 Phone: (517) 241-1989Phone: (517) 241-1989Fax: (517) 241-1981Fax: (517) 241-1981

Visitor/delivery address: Visitor/delivery address: 1st Floor, Ottawa Building1st Floor, Ottawa Building611 W. Ottawa Street611 W. Ottawa StreetLansing, Michigan 48933Lansing, Michigan 48933

District OfficeDistrict OfficeRadiation Safety SectionRadiation Safety SectionMichigan Department of Community HealthMichigan Department of Community Health38600 Van Dyke, Suite 37538600 Van Dyke, Suite 375Sterling Heights, Michigan 48312Sterling Heights, Michigan 48312Phone: (586) 446-0200Phone: (586) 446-0200Fax: (586) 446-0227Fax: (586) 446-0227