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SECTION 13 49 00
RADIATION PROTECTION
 
 
Copyright 2008 - 2014 ARCAT, Inc. - All rights reserved
** NOTE TO SPECIFIER ** a-fabco, inc., Radiation Shielding Products . This section is based on the products of a-fabco, inc. which is located at:
11550 U.S. Hwy. 41 S.
Gibsonton, FL 33534.
Toll Free Tel: (800) 330-5323.
Tel: (813) 677-8790.
Fax: (813) 671-1865.
Email: arcat@afabxray.com
Web: www.afabxray.com.
Since 1970, a-fabco, inc. has been providing leaded products for industrial, medical diagnostic, nuclear and therapy applications. These products include all items necessary to the construction of radiographic facilities as well as special design of leaded cabinetry, operator barriers, neutron doors, and custom designed modular x-ray rooms and x-ray inspection cabinets. Prior association with sales and service of radiographic equipment and accessories, allows customers to benefit from a-fabco's unique knowledge of how the products are utilized and an understanding of their needs relative to special product design and departmental traffic patterns. Our corporate philosophy of always putting the customer first, has aided our steady growth and our attention to customer field problems, has allowed us to make many innovations in design and manufacture that have made their job easier.
.
 
PART 1 GENERAL
 
1.1
SECTION INCLUDES
 
** NOTE TO SPECIFIER ** Delete items below not required for project.
 
A.
Radiation Shielding Doors.
B.
Radiation Shielding Door Frames.
C.
Radiation Shielding Gypsum Board.
D.
Radiation X-Ray Lead Glass.
E.
Lead-Lined View Window Frames.
F.
Lead Sheets.
G.
Related Radiation Shielding Accessories.
H.
Radiation Protecting High Density Concrete Products.
 
** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
 
1.2
RELATED SECTIONS
A.
Section 06 10 00 - Rough Carpentry.
B.
Section 08 11 13 - Custom Hollow Metal Doors and Frames.
C.
Section 08 14 23 - Plastic-Laminate-Faced Wood Doors.
D.
Section 08 71 53 - Security Door Hardware.
E.
Section 09 21 16 - Gypsum Board Shaft Wall Assemblies.
F.
Section 09 90 00 - Painting and Coating.
1.3
REFERENCES
 
** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
 
A.
ASTM A 366 - Standard Specification for Commercial Steel (CS) Sheet, Carbon (0.15 Maximum Percent) Cold-Rolled.
B.
ASTM A 526 - Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process, Commercial Quality.
C.
ASTM B 749 - Standard Specification for Lead and Lead Alloy Strip, Sheet, and Plate Products
D.
Federal Specification QQL-171.
E.
Federal Specification QQL-201 F.
F.
Steel Door Institute (SDI)-100 - Recommended Specifications for Standard Steel Doors and Frames.
1.4
DEFINITIONS
A.
Lead Equivalence: Thickness of lead that provides same reduction of radiation passage as material in question under specified conditions.
1.5
SYSTEM DESCRIPTION
A.
Design Requirements:
1.
Provide materials and workmanship, including joints and fasteners, that maintain continuity of radiation protection at all points and all directions equivalent to materials specified in thicknesses and locations indicated.
2.
Lead-Lined Assemblies: Provide lead thickness in doors, door frames, window frames, and other items located in lead-lined assemblies, not less than that indicated for assemblies in which they are installed unless indicated otherwise.
 
** NOTE TO SPECIFIER ** Delete the next paragraph if Lead Glazing is not required.
 
3.
Lead Glazing: Provide lead equivalence not less than that indicated for assembly in which glazing is installed unless indicated otherwise.
1.6
SUBMITTALS
A.
Submit under provisions of Section 01 30 00.
B.
Product Data: Manufacturer's data sheets on each product to be used, including:
1.
Preparation instructions and recommendations.
2.
Storage and handling requirements and recommendations.
3.
Installation methods.
C.
Shop Drawings:
1.
Indicate dimensions, description of materials and finishes and general construction.
2.
Indicate layout of radiation-protected areas.
3.
Indicate lead thickness or lead equivalencies of components.
1.7
QUALITY ASSURANCE
A.
Qualifications: Firm with minimum of 5 years successful experience manufacturing radiation protection products similar to those specified for this Project.
B.
Radiation Protection Survey: Employ registered X-Ray physicist, certified by American Board of Radiology, for testing specified radiation protective Work and to conduct radiation protection survey of facility after radiation shielding materials are installed.
1.
Take radiation measurements and indicate evaluation of measurements in report. Submit report to Architect and Owner upon completion of report.
2.
Take radiation measurements in locations indicated by Architect.
C.
Radiation Protection Work: Comply with National Council of Radiation Protection (NCRP) Report No. 049 - Structural Shielding Design and Evaluation for Medical Use of X-Rays and Gamma Rays of Energies up to 10 MeV.
1.
Comply with requirements of local regulatory agencies where local standards and criteria exceed requirements of NCRP Report No. 049.
D.
Single Source Responsibility: Obtain radiation protection materials and accessories produced as standard products from single manufacturer regularly engaged in production of X-Ray shielding materials, equipment, and accessories.
E.
Mock-Up: Provide a mock-up for evaluation of preparation techniques and application workmanship.
1.
Finish areas designated by Architect.
2.
Do not proceed with remaining work until workmanship, color, and sheen are approved by Architect.
3.
Rework mock-up area as required to produce acceptable work.
1.8
DELIVERY, STORAGE, AND HANDLING
A.
Comply with manufacturer's instructions for receiving, handling, storing, and protecting materials.
B.
Deliver materials in manufacturer's original, unopened, undamaged containers with identification labels intact.
C.
Store materials in original packaging, protected from exposure to harmful environmental conditions, including static electricity, and at temperature and humidity conditions recommended by manufacturer.
D.
Exercise care to prevent edge damaged materials.
1.9
PROJECT CONDITIONS
A.
Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
PART 2 PRODUCTS
 
2.1
MANUFACTURERS
A.
Acceptable manufacturer: a-fabco, inc., 11550 U.S. Hwy. 41 S., Gibsonton, FL 33534. ASD. Tel: (800) 330-5323. Fax: (813) 671-1865. E-mail: arcat@afabxray.com Web: www.afabxray.com.
 
** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
 
B.
Substitutions: Not permitted.
C.
Requests for substitutions will be considered in accordance with provisions of Section 01 60 00.
2.2
LEAD MATERIALS
 
** NOTE TO SPECIFIER ** Retain only thicknesses required on this project and delete all others. Delete the entire paragraph if Lead sheet is not required.
 
A.
Lead Sheet: 99.9 percent pure virgin lead, free from oxide inclusions, scale, blisters, and cracks. Meets or exceeds Federal Specification QQL-201 F Grade C.
1.
Thickness / Weight: 0.0156 - 1/64 inch (0.3968mm) / 1 lb / sq. ft.
2.
Thickness / Weight: 0.0312 - 1/32 inch (0.7937mm) / 2 lbs / sq. ft.
3.
Thickness / Weight: 0.0391 - 5/128 inch (0.9922mm) / 2.5 lbs / sq. ft.
4.
Thickness / Weight: 0.0469 - 3/64 inch (1.1906mm) / 3 lbs / sq. ft.
5.
Thickness / Weight: 0.0625 - 1/16 inch (1.5875mm) / 5 lbs / sq. ft.
6.
Thickness / Weight: 0.0781 - 5/64 inch (1.9844mm) / 5 lbs / sq. ft.
7.
Thickness / Weight: 0.0937 - 3/32 inch (2.3812mm) / 6 lbs / sq. ft.
8.
Thickness / Weight: 0.1250 - 1/8 inch (3.1750mm) / 8 lbs / sq. ft.
9.
Thickness / Weight: 0.1562 - 5/32 inch (3.9687mm) / 10 lbs / sq. ft.
10.
Thickness / Weight: 0.1875 - 3/16 inch (4.7625mm) / 12 lbs / sq. ft.
11.
Thickness / Weight: 0.2500 - 1/4 inch (6.3500mm) / 16 lbs / sq. ft.
12.
Thickness / Weight: 0.3125 - 5/16 inch (7.9375mm) / 20 lbs / sq. ft.
13.
Thickness / Weight: 0.3750 - 3/8 inch (9.5250mm) / 24 lbs / sq. ft.
14.
Thickness / Weight: 0.4000 - 2/5 inch (10.1mm) / 24.6 lbs / sq. ft.
 
** NOTE TO SPECIFIER ** Retain only thicknesses required on this project and delete all others. Delete the entire paragraph if Lead plate is not required.
 
B.
Lead Plate: 99.9 percent pure virgin lead, free from oxide inclusions, scale, blisters, and cracks. Meets or exceeds Federal Specification QQL-201 F Grade C.
1.
Thickness / Weight: 0.50 - 1/2 inch (12.70mm) / 30 lbs / sq. ft.
2.
Thickness / Weight: 0.75 - 3/4 inch (19.05mm) / 46 lbs / sq. ft.
3.
Thickness / Weight: 1.00 - 1 inch (25.40mm) / 60 lbs / sq. ft.
4.
Thickness / Weight: 1.50 - 1 1/2 inches (38.10mm) / 90 lbs / sq. ft.
5.
Thickness / Weight: 2.00 - 2 inches (50.80mm) / 120 lbs / sq. ft.
6.
Thickness / Weight: 2.25 - 2 1/4 inches (57.15mm) / 135 lbs / sq. ft.
7.
Thickness / Weight: 2.50 - 2 1/2 inches (63.50mm) / 150 lbs / sq. ft.
8.
Thickness / Weight: 2.75 - 2 3/4 inches (69.85mm) / 165 lbs / sq. ft.
9.
Thickness / Weight: 3.00 - 3 inches (76.20mm) / 180 lbs / sq. ft.
10.
Thickness / Weight: 3.25 - 3 1/4 inches (82.55mm) / 195 lbs / sq. ft.
11.
Thickness / Weight: 3.50 - 3 1/2 inches (88.90mm) / 210 lbs / sq. ft.
2.3
RADIATION SHIELDING CONSTRUCTION MATERlALS
A.
Lead Lined Gypsum Board: Layer of sheet lead laminated to back of gypsum board, meeting ASTM C 1396 Type X, UL rated.
 
** NOTE TO SPECIFIER ** Retain only panel sizes from the following two options.
 
1.
Dimensions: 48 inches by 96 inches (2438mm x 1219mm)
2.
Dimensions: 48 inches by 120 inches (2438mm x 3048mm)
 
** NOTE TO SPECIFIER ** Insert required lead thickness. Where sheet lead over 1/8 inch (3.175 mm) is required, bonding to drywall is not recommended.
 
3.
Lead Thickness: _____________.
 
** NOTE TO SPECIFIER ** Retain only thickness required from the following two options.
 
4.
Gypsum Board Thickness: 1/2 inch (13 mm).
5.
Gypsum Board Thickness: 5/8 inch (16 mm).
B.
Lead Lined Plywood: Layer of sheet lead laminated to back span rated plywood. Exterior (CDX) grade.
 
** NOTE TO SPECIFIER ** Select plywood dimensions. Lead backed plywood is available in full 48" x 96" sizes for ceiling and wall applications. The limiting factor is the weight of the total unit based on lead per square foot weight and the ability of the contractor to handle the weight during installation. Recommendation is not to exceed 1/8" lead on full sheets. Delete one of the next two paragraphs.
 
1.
Dimensions: 16 inches by 84 inches (406mm x 2134mm)
2.
Dimensions: 48 inches by 96 inches (1219mm x 2438mm)
 
** NOTE TO SPECIFIER ** Insert required lead thickness.
 
3.
Lead Thickness: _____________.
 
** NOTE TO SPECIFIER ** Retain only thickness required from the following three options.
 
4.
Plywood Thickness: 1/2 inch (13 mm).
5.
Plywood Thickness: 5/8 inch (16 mm).
6.
Plywood Thickness: 3/4 inch (19 mm).
 
** NOTE TO SPECIFIER ** Retain only thicknesses required on this project and delete all others. Delete the entire paragraph if lead bricks are not required.
 
C.
Lead Brick: Interlocking lead bricks with V-groove on four sides. 99.9 percent pure virgin lead, free from oxide inclusions, scale, blisters, and cracks. Meets or exceeds Federal Specification QQL-171 F Grade C.
1.
Dimensions: 1 inch by 4 inches by 12 inches (25.40mm x 102mm x 305mm).
2.
Dimensions: 1 1/2 inches by 4 inches by 12 inches (38.10mm x 102mm x 305mm).
3.
Dimensions: 2 inches by 4 inches by 12 inches (50.80mm x 102mm x 305mm).
4.
Dimensions: 2 1/2 inches by 4 inches by 12 inches (63.50mm x 102mm x 305mm).
D.
Concrete Block: Interlocking chevron type. 4000 psi minimum compressive strength. Dry stacked and anchored.
 
** NOTE TO SPECIFIER ** Select Block Dimensions. Delete one of the next two paragraphs.
 
1.
Dimensions: 4 inches by 6 inches by 17 inches (102mm x 152mm x 432mm).
a.
Volume: 0.2361 cft.
2.
Dimensions: 6 inches by 6 inches by 12 inches (152mm x 152mm x 305mm).
a.
Volume: 0.25 cft.
 
** NOTE TO SPECIFIER ** Select Density. Delete one of the next two paragraphs.
 
3.
Density: 250 to 255 pcf / 4.01 GCC.
a.
Block Weight: 62.5 to 63.5 lbs
4.
Density: 300 to 305 pcf / 4.81 GCC.
a.
Block Weight: 75 to 76 lbs.
 
** NOTE TO SPECIFIER ** A-Fabco, 1nc. is a national distributor for Schott Glass N.A.
 
E.
Lead Glass: Radiation shielding glass for work with x-rays released by nuclear disintegration.
 
** NOTE TO SPECIFIER ** Select thickness and equivalency requirements from the next two options. Insert values as determined by the project physicist. Delete one of the next two paragraphs.
 
1.
Thickness / Equivalency: As specified in the Contract Documents.
2.
Thickness: _________; Equivalency: _________.
3.
Lead Oxide Content: Greater than 65 percent.
4.
Heavy Metallic Oxide Content: Greater Than 70 percent.
5.
Density (p): Greater than 5.05 g / cu. cm).
6.
Refractive Index (nD): 1.79.
7.
Knoop Hardness (HK): 360.
8.
Hydrolytic Class: 3
2.4
RADIATION SHIELDING DOORS
A.
Swinging Neutron Door:
1.
Dimensions: As specified on the Contract Drawings.
2.
Shell: Steel.
 
** NOTE TO SPECIFIER ** Insert Lead and polyboron thickness based on project requirements as determined by the project physicist.
 
3.
Core: ___ inch (____mm) Lead and ____ inches (_____mm) polyboron.
4.
Operation Inputs: Door stop, door open/close, door partial open.
 
** NOTE TO SPECIFIER ** Select door operator based on door contents and weight from the next three options. Consult A-Fabco for more information on specifying operators. Delete two of the next three paragraphs.
 
5.
Actuation: brookfield NB-500 operator with interlock switches and manual override.
6.
Actuation: brookfield NB-1000 operator with interlock switches and manual override.
7.
Actuation: brookfield NB-2000 operator with interlock switches and manual override.
8.
Safety:
a.
Pressure switches and infrared presence sensors.
b.
Push Pads.
c.
Battery Backup.
9.
Data Access Unit for setup and programming.
10.
Floor mounted liquid stop / shock absorber.
B.
Sliding Neutron Door:
1.
Dimensions: As specified on the Contract Drawings.
2.
Shell: Steel.
 
** NOTE TO SPECIFIER ** Select Core thickness based on project requirements. Insert Lead and polyboron thickness based on project requirements as determined by the project physicist. Delete one of the next two paragraphs.
 
3.
Core: 6 inch (152mm) Lead and 10 inches (254mm) polyboron.
4.
Core: ___ inch (____mm) Lead and ____ inches (_____mm) polyboron.
5.
Operation Inputs: Door stop, door open/close, door partial open.
6.
Actuation: brookfield NB-4000 operator with interlock switches and manual override.
7.
Actuation: brookfield NB-4100 operator with interlock switches and manual override.
8.
Safety:
a.
Pressure switches and infrared presence sensors.
b.
Push Pads.
c.
Battery Backup.
 
** NOTE TO SPECIFIER ** The following two paragraphs are options. Retain only those required on this project.
 
d.
Hand crank for manual door operation.
e.
Drive disconnect system for emergency opening.
9.
Data Access Unit for setup and programming.
C.
Lead Lined Wood Doors:
1.
Flush veneered construction using single layer of sheet lead in center of door. Thickness as specified in the Contract Documents.
a.
Extend sheet lead lining to door edges providing X-Ray absorption equal to the wall in which the door is installed.
2.
Edge Strips: Minimum thickness of 2 inches (51 mm) each edges of door.
a.
Species: To match veneer.
b.
Extend vertical edge strips full height of door and bevel 1/8 inch (3 mm) for each 2 inches (51 mm) of door thickness.
 
** NOTE TO SPECIFIER ** Delete the next paragraph if doors do not contain glazing.
 
3.
Secure glass with lead lined metal frame of complimentary color. Apply frame veneer of same species as door face veneer.
2.5
RADIATION SHIELDING FRAMES
A.
Single Rabbet Metal Door Frames: Welded galvannealed frame with a 2 inch (51 mm) face. Door frames to accommodate lead lining up to 3/8 inch (10 mm) thick.
 
** NOTE TO SPECIFIER ** Select sheet thickness. Delete one of the next two paragraphs.
 
1.
Sheet Thickness: 16 gauge (1.5 mm).
2.
Sheet Thickness: 14 gauge (1.3 mm)
 
** NOTE TO SPECIFIER ** Select throat size. 4 7/8" is standard, custom sizes may be manufactured when thicker lead, PET Plywood panels with battens and double drywall are utilized. Delete one of the next two paragraphs and insert custom size where required.
 
3.
Throat: 4 7/8 inch (124 mm)
4.
Throat: ___________
5.
Door Frame Supports: 2 1/4 inch (57 mm) steel angle iron.
 
** NOTE TO SPECIFIER ** Select Hinge type. Delete two of the next three paragraphs.
 
6.
Hinge Type: Butt.
7.
Hinge Type: Continuous.
8.
Hinge Type: Pivot.
B.
Double Rabbet Metal Door Frames: Welded galvannealed frame with a 2 inch (51 mm) face. Door frames to accommodate lead lining up to 3/8 inch (10 mm) thick.
 
** NOTE TO SPECIFIER ** Select sheet thickness. Delete one of the next two paragraphs.
 
1.
Sheet Thickness: 16 gauge (1.5 mm).
2.
Sheet Thickness: 14 gauge (1.3 mm)
 
** NOTE TO SPECIFIER ** Select throat size. 4 7/8" is standard, custom sizes may be manufactured when thicker lead, PET Plywood panels with battens and double drywall are utilized. Delete one of the next two paragraphs and insert custom size where required.
 
3.
Throat: 4 7/8 inch (124 mm)
4.
Throat: ___________
5.
Door Frame Supports: 2 1/4 inch (57 mm) steel angle iron.
 
** NOTE TO SPECIFIER ** Select Hinge type. Delete two of the next three paragraphs.
 
6.
Hinge Type: Butt.
7.
Hinge Type: Continuous.
8.
Hinge Type: Pivot.
 
** NOTE TO SPECIFIER ** Shielding requirements in excess of 2.1mm require multiple thicknesses of glass stacked face to face in the frame. For several thicknesses a single rabbet frame with a wide throat is manufactured in 14 gauge galvaneel.
 
C.
Metal View Window Frames: 16 gauge (1.5 mm) welded steel frame with a 4 7/8 inch (124 mm) throat and 2 inch (51 mm) face. Design window frames to accept any thickness of radiation shielding glass.
1.
Provide radiation protection equivalent to that provided by sheet lead in partition in which view window is installed.
2.
Provide 1/2 inch (13 mm) removable stops.
PART 3 EXECUTION
 
3.1
EXAMINATION
A.
Verification of Conditions: Examine areas and conditions under which Work is to be performed and identify conditions detrimental to proper or timely completion.
B.
Verify that steel framing is not less than 20 gage (0.9 mm) with studs spaced not more than 16 inches (406 mm) on center, unless noted otherwise.
C.
Do not proceed until unsatisfactory conditions have been corrected.
 
** NOTE TO SPECIFIER ** Delete if Lead Lined Gypsum Board is not specified.
 
3.2
INSTALLATION OF LEAD-LAMINATED GYPSUM BOARD
A.
Comply with manufacturer's recommendations.
B.
Adhere 2 inch (52mm) wide lead batten strips on face of studs at joints in lead-laminated gypsum board, including inside and outside corners. Strips must be of same thickness as sheet lead laminated on gypsum board.
C.
Shim studs and other framing members as necessary to provide flat, flush finished surfaces.
D.
Install lead-laminated gypsum board on framing with screws spaced not more than 8 inches (203 mm) on center along edges of board and 12 inches (305 mm) on center in field of board.
E.
Penetrations for wall outlets, switches and other penetrations must be backed or wrapped with lead equal thickness as the wall lead requirement.
 
** NOTE TO SPECIFIER ** Delete if Doors and Door Frames are not specified.
 
3.3
INSTALLATION OF DOORS AND DOOR FRAMES
 
** NOTE TO SPECIFIER ** Delete this article if no lead-lined doors and frames on project.
 
A.
Lead-Lined Frames: Install lead-lined steel door frames in accordance with Section 08 11 13 - Custom Hollow Metal Doors and Frames.
B.
Lead-Lined Doors: Install doors in frames level and plumb, aligned with frames and with uniform clearance at edges. Coordinate installation with Section 08 14 23.
C.
Touch up damaged finishes with compatible coating after sanding smooth.
 
** NOTE TO SPECIFIER ** Delete if Window Frames are not specified.
 
3.4
INSTALLATION OF WINDOW FRAMES
A.
Shim and set leaded side of frame plumb and square in wall opening on radiation side of wall.
B.
Install setting blocks, shims, and glazing tape in glazing channel to prevent galls from touching steel frame.
C.
Place steel stops in position and mark location of stop and frame retaining holes on steel frame.
3.5
FIELD QUALITY CONTROL
A.
Field Inspection: Owner will engage qualified independent testing and inspecting agency to perform field tests and inspections and prepare test reports.
B.
Correct deficiencies in, or remove and replace, radiation protection that inspection reports indicate does not comply with specified requirements.
C.
Testing: After radiology equipment has been installed and placed in operating condition, Owner will engage radiation health physicist to test radiation protection.
D.
Correct deficiencies in, or remove and replace, radiation protection that testing indicates does not comply with specified requirements, including finishes and other Work covering defective Work.
 
** NOTE TO SPECIFIER ** Delete the next article if no lead-lined doors and frames exist on the project.
 
3.6
ADJUSTING
A.
Check and readjust operating hardware items, leaving doors and frames undamaged and in proper operating condition.
3.7
CLEANING
A.
Remove excess materials from site and leave Work areas broom clean.
B.
Leave exposed surfaces ready for site finishing.
3.8
PROTECTION
A.
Lock radiation-protected rooms once doors hardware is installed. Limit access to only those persons performing Work in radiation-protected rooms or as directed by Owner.
B.
Tape temporary paper signs on radiation-resistant walls with the following text:
1.
"Do not mount equipment on this wall without covering penetrating fasteners with lead sheet of thickness required by contract documents".
END OF SECTION