Revised Cath Shielding 2024.pdf
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- Solicitation number
- 36C24926R0057
About this file
This is a Radiation Shielding Design document prepared for Mountain Home VA Medical Center's new Cardiac Catheterization Laboratory facility. The design specifies shielding requirements for two cardiac cath lab rooms (L222 and L220) located on the 2nd floor of the facility.
The physicist recommends using 1/32nd inch of leaded drywall for all barriers marked in green, including technologist viewing windows, scrub doors, and hallway entrance doors to protect adjacent low-occupancy areas (patient waiting areas, hallways, and storage rooms). Barriers marked in red at the technologist console area require no shielding due to the geometry of the proposed fluoroscopy unit layout. The design calculations are based on 100 patients per week and categorize all shielding as "Other wall" type construction using lead material. Specific barrier requirements vary by location, with lead thickness ranging from 1/8 inch to 1 inch depending on distance and occupancy type. The ceiling and floor require concrete shielding (2.07 inches and 3.62 inches respectively). Detailed specifications tables provide barrier identification, distance measurements in feet, dose calculations, and required shielding materials for each wall, door, and viewing window in both rooms. The design was completed by John Kevin Mullins, M.H.P., DABMP (Certified Medical Health Physicist) on January 3, 2025.
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Text version
MHVA Cardiac Cath Lab
RADIATION SHIELDING DESIGN
JOHN KEVIN MULLINS, M.H.P., DABMP
Mountain Home VA Medical Center
Radiation Shielding Design
New Cath Lab 1 & 2
2nd Floor Rooms L222 & L220
Physicist Shielding Results:
The planned Cardiac Cath Lab relocation includes two large area rooms L220 and L220. Presently, the proposed locations are surrounded by low occupancy areas; patient waiting area, hallways, and multiple storage rooms. The multiple storage areas are accessible, convenient, large, and easily converted to future offices with extended staff occupancy.
Circumventing excessive shielding costs for future storage room conversions, I recommend using 1/32th inch of leaded drywall for all barriers marked in green. This includes technologist’s viewing windows, scrub doors, and hallway entrance doors. Technologist’s console area barriers marked in red require no shielding due to the geometry of the proposed layout of the fluoroscopy unit.
Mountain Home VA Medical Center
Radiation Shielding Design
New Cath Lab 1 & 2
2nd Floor Rooms L222 & L220
Walls Viewing Window Door
Cath Lab Room L222
Barrier ID Distance (feet) Barrier ID Distance (feet)
Wall 2 - arrow 1 11.9 Wall 5 - arrow 8 11.9
Wall 3 - arrow 2 12.2 Door - arrow 9 13.6
Wall 3 - arrow 3 9.9 Wall 6 - arrow 10 14.4
Wall 4 - arrow 4 11.3 Wall 7 - arrow 11 17.2
Wall 4 - arrow 5 10.2 Door - arrow 12 20.4
Wall 4 - arrow 6 13.3 Ceiling 12
Wall 5 - arrow 7 13.6 Floor 5
Wall 1
Wall 2
Wall 3
Wall 4
Wall 5
Wall 6
Wall 7
5 6
12 Wall 1
Wall 2
Wall 4
Wall 5
Wall 6
Wall 7
Cath Lab Room L220
Barrier ID Distance (feet) Barrier ID Distance (feet)
Wall 2 - arrow 1 11.7 Wall 5 - arrow 8 11.7
Wall 3 - arrow 2 12.4 Door - arrow 9 13.8
Wall 3 - arrow 3 10.2 Wall 6 - arrow 10 14.5
Wall 4 - arrow 4 11.0 Wall 7 - arrow 11 17.0
Wall 4 - arrow 5 10.1 Door - arrow 12 20.2
Wall 4 - arrow 6 13.5 Ceiling 12
Wall 5 - arrow 7 13.4 Floor 5
Design prepared and completed by: John Kevin Mullins, M.H.P., DABMP
Certified Medical Health Physicist
Date: January 3, 2025
File details come from the government source that posted it. Updated .