36C25819R0077-003.pdf

ATTACHMENT 02

SPECIFICATIONS

605-19-100

13 pages

13 July 2018

Loma Linda, California VA Health Care System (605)

Upgrade HVAC & Led Lining

CONSTRUCTION

Radiation Protection Shielding Design

Facility: VA Loma Linda - Procedure Room Address: 11201 Benton St, Loma Linda, CA 92357

Contact: Timothy J. LaFave, PM/COR, Loma Linda VAMC, Timothy.Lafave@va.gov Signature:

Room ID: SSV Procedure Room 3D-72 Date: July 13, 2018

Calculation Method: NCRP 147

Installation Type: Fluoroscopic

Fluoroscopic Patients / Week: 30

Barrier Requirements Summary

Existing Structural Recommended P/T Shielded Air Kerma Protected Location Material Additional Barrier (mGy/wk) (mGy/wk)

North Wall - Balcony 1.75 in gypsum 0.1 0.0594

North Wall - Glass 0.50 in plate glass 0.1 0.0843

North West Corner - Corridor 1.75 in gypsum 0.1 0.0873

East Wall - Sleep Room 1.25 in gypsum 2 / 64ths inch lead 0.02 0.0123

South Wall - Handwash Station Glass 0.25 in plate glass 1.50 in plate glass 0.1 0.0781

South Wall - Ante Room 1.25 in gypsum 2 / 64ths inch lead 0.1 0.0123

West Wall - Corridor 1.25 in gypsum 2 / 64ths inch lead 0.1 0.0112

Ceiling 3.0 in concrete 0.02 0.0096

Floor 3.0 in concrete 0.02 0.0096

Physicist:

Steven M. LaFontaine, M.S., DABR Certified Medical Physicist Therapy Physics, Inc.

2501 Cherry Ave., #270, Signal Hill, CA 90755 562-317-0650 Fax: 562-317-0661 Email: steven@therapyphysics.com

7/13/2018 VA Loma Linda Procedure 3D-72 C-Arm-18.xlsm

Therapy Physics, Inc.

562-317-0650

Comments and Recommendations

1. This is a shielding report for a mobile c-arm procedure room located on the third floor of this multi-story building. A minimum floor-to-floor distance of 12 feet was assumed; a minimum of 2 inches concrete is required in the floor and ceiling. The C-Arm is assumed to expose within a 5 ft by 5 ft box area, centered in the room with a straight line of access to the double doors (marked on diagram). Distance measurements are made from the closest point of the barrier to this box area.

2. All shielding requirements are based on NCRP Report #147 (2005): “Structural Shielding Design and Evaluation for Medical Use of X- Rays.” Calculations for each barrier are made using the computer software program based on data and assumptions are from NCRP Report # 147.

3. The following assumptions were used in the shielding calculations:

Workload: 30 patients per week (240 minutes Fluoro beam on) each room. Assumes 8 minutes fluoro time per patient.

4. Assuming all walls will have the standard 2 layers of 5/8" gypsum board and doors are solid-core.

5. The shielding recommendations are designed to meet Radiation Protection Standards as defined by the VA Code of Radiation Control Regulations. Future changes in either assumed information, equipment, workload, or room design will necessitate a re-evaluation of these shielding requirements

6. This report has been updated as of July 13, 2018, to reflect updated in shielding material thickness for North Wall - Balcony; all previous reports should be disregarded. As confirmed by architectural drawings, the exterior contains a total of 1.75 inches gypsum, among other additional materials; the window is solid plate glass with one inch spandrel insulating panel (estimated equivalent thickness is 0.5 inches).

7/13/2018 VA Loma Linda Procedure 3D-72 C-Arm-18.xlsm

Protected Location: North Wall - Balcony Design Goal (P) (mGy/wk): 0.02 Occupancy (T): 0.2 P/T (mGy/wk): 0.100 Barrier Type:

Primary or Secondary:

Use Factor:

Workload Distribution:

Number of Patients / Week:

Scatter Direction:

Use Table / Bucky Preshielding? :

Under-Table Fluoro Tube

Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter

Distance to Protected Location: 20.0 ft 20.0 ft Unshielded Air Kerma (mGy/wk): 9.69E-03 2.50E-01

Other Material Tranmission: 1.00E+00 1.00E+00 Remaining Air Kerma (mGy/wk): 9.69E-03 2.50E-01

Transmission Model: Secondary Secondary Preshielding Credit: N/A

Existing Material Tranmission: 2.29E-01 2.29E-01 Shielded Air Kerma (mGy/wk): 0.0022 0.0572

Other Existing Material: Material:

Structual Material Required: 0.96 in Material:

Existing Structural Materal: 1.75 in Material: Shielded Air Kerma (mGy/wk): 0.0594

Side

Gypsum Gypsum

N/A

N/A Secondary

Fluoro (R&F)

Secondary Wall

7/13/2018 VA Loma Linda Procedure 3D-72 C-Arm-18.xlsm

Protected Location: North Wall - Glass

Primary or Secondary:

Use Factor:

Workload Distribution:

Number of Patients / Week:

Scatter Direction:

Use Table / Bucky Preshielding? :

Under-Table Fluoro Tube

Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter

Distance to Protected Location: 20.0 ft 20.0 ft Unshielded Air Kerma (mGy/wk): 9.69E-03 2.50E-01

Other Material Tranmission: 1.00E+00 1.00E+00 Remaining Air Kerma (mGy/wk): 9.69E-03 2.50E-01

Transmission Model: Secondary Secondary Preshielding Credit: N/A

Existing Material Tranmission: 3.24E-01 3.24E-01 Shielded Air Kerma (mGy/wk): 0.0031 0.0811

Other Existing Material: Material:

Structual Material Required: 0.41 in Material:

Existing Structural Materal: 0.50 in Material: Shielded Air Kerma (mGy/wk): 0.0843Plate Glass

N/A

Fluoro (R&F)

Side

Plate Glass

Secondary Wall

Secondary N/A

7/13/2018 VA Loma Linda Procedure 3D-72 C-Arm-18.xlsm

Protected Location: North West Corner - Corridor

Primary or Secondary:

Use Factor:

Workload Distribution:

Number of Patients / Week:

Scatter Direction:

Use Table / Bucky Preshielding? :

Under-Table Fluoro Tube

Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter

Distance to Protected Location: 16.5 ft 16.5 ft Unshielded Air Kerma (mGy/wk): 1.42E-02 3.68E-01

Other Material Tranmission: 1.00E+00 1.00E+00 Remaining Air Kerma (mGy/wk): 1.42E-02 3.68E-01

Transmission Model: Secondary Secondary Preshielding Credit: N/A

Existing Material Tranmission: 2.29E-01 2.29E-01 Shielded Air Kerma (mGy/wk): 0.0033 0.0840

Other Existing Material: Material:

Structual Material Required: 1.53 in Material:

Existing Structural Materal: 1.75 in Material: Shielded Air Kerma (mGy/wk): 0.0873Gypsum

N/A

Fluoro (R&F)

Side

Gypsum

Secondary Wall

Secondary N/A

7/13/2018 VA Loma Linda Procedure 3D-72 C-Arm-18.xlsm

Protected Location: East Wall - Sleep Room Design Goal (P) (mGy/wk): 0.02 Occupancy (T): 1 P/T (mGy/wk): 0.020 Barrier Type:

Primary or Secondary:

Use Factor:

Workload Distribution:

Number of Patients / Week:

Scatter Direction:

Use Table / Bucky Preshielding? :

Under-Table Fluoro Tube

Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter

Distance to Protected Location: 10.0 ft 10.0 ft Unshielded Air Kerma (mGy/wk): 3.88E-02 1.00E+00 Structural Material Tranmission: 6.56E-01 6.56E-01 Remaining Air Kerma (mGy/wk): 2.54E-02 6.56E-01

Transmission Model: Secondary Secondary Preshielding Credit: N/A

Rec + Preshield Transmission: 1.80E-02 1.80E-02 Shielded Air Kerma (mGy/wk): 0.0005 0.0118

Existing Structural Material: 1.25 in Material:

Additional Barrier Required: 0.64 mm Material:

Recommended Additional Barrier: 0.79 mm Material: ( 2 / 64ths inch ) Shielded Air Kerma (mGy/wk): 0.0123

Lead

N/A

Fluoro (R&F)

Gypsum

Side

Lead

Secondary Wall

Secondary N/A

7/13/2018 VA Loma Linda Procedure 3D-72 C-Arm-18.xlsm

Protected Location: South Wall - Handwash Station Glass

Primary or Secondary:

Use Factor:

Workload Distribution:

Number of Patients / Week:

Scatter Direction:

Use Table / Bucky Preshielding? :

Under-Table Fluoro Tube

Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter

Distance to Protected Location: 9.0 ft 9.0 ft Unshielded Air Kerma (mGy/wk): 4.78E-02 1.24E+00 Structural Material Tranmission: 7.81E-01 7.81E-01 Remaining Air Kerma (mGy/wk): 3.74E-02 9.66E-01

Transmission Model: Secondary Secondary Preshielding Credit: N/A

Rec + Preshield Transmission: 7.79E-02 7.79E-02 Shielded Air Kerma (mGy/wk): 0.0029 0.0752

Existing Structural Material: 0.25 in Material:

Additional Barrier Required: 1.30 in Material:

Recommended Additional Barrier: 1.50 in Material: Shielded Air Kerma (mGy/wk): 0.0781

Plate Glass

Fluoro (R&F)

Plate Glass

Side

Plate Glass

Secondary Wall

Secondary N/A

7/13/2018 VA Loma Linda Procedure 3D-72 C-Arm-18.xlsm

Protected Location: South Wall - Ante Room

Primary or Secondary:

Use Factor:

Workload Distribution:

Number of Patients / Week:

Scatter Direction:

Use Table / Bucky Preshielding? :

Under-Table Fluoro Tube

Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter

Distance to Protected Location: 10.0 ft 10.0 ft Unshielded Air Kerma (mGy/wk): 3.88E-02 1.00E+00 Structural Material Tranmission: 6.56E-01 6.56E-01 Remaining Air Kerma (mGy/wk): 2.54E-02 6.56E-01

Transmission Model: Secondary Secondary Preshielding Credit: N/A

Rec + Preshield Transmission: 1.80E-02 1.80E-02 Shielded Air Kerma (mGy/wk): 0.0005 0.0118

Existing Structural Material: 1.25 in Material:

Additional Barrier Required: 0.24 mm Material:

Recommended Additional Barrier: 0.79 mm Material: ( 2 / 64ths inch ) Shielded Air Kerma (mGy/wk): 0.0123

Fluoro (R&F)

Gypsum

Side

Lead

Secondary Wall

Secondary N/A

7/13/2018 VA Loma Linda Procedure 3D-72 C-Arm-18.xlsm

Protected Location: West Wall - Corridor

Primary or Secondary:

Use Factor:

Workload Distribution:

Number of Patients / Week:

Scatter Direction:

Use Table / Bucky Preshielding? :

Under-Table Fluoro Tube

Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter

Distance to Protected Location: 10.5 ft 10.5 ft Unshielded Air Kerma (mGy/wk): 3.51E-02 9.08E-01 Structural Material Tranmission: 6.56E-01 6.56E-01 Remaining Air Kerma (mGy/wk): 2.30E-02 5.95E-01

Transmission Model: Secondary Secondary Preshielding Credit: N/A

Rec + Preshield Transmission: 1.80E-02 1.80E-02 Shielded Air Kerma (mGy/wk): 0.0004 0.0107

Existing Structural Material: 1.25 in Material:

Additional Barrier Required: 0.22 mm Material:

Recommended Additional Barrier: 0.79 mm Material: ( 2 / 64ths inch ) Shielded Air Kerma (mGy/wk): 0.0112

Fluoro (R&F)

Gypsum

Side

Lead

Secondary Wall

Secondary N/A

7/13/2018 VA Loma Linda Procedure 3D-72 C-Arm-18.xlsm

Protected Location: Ceiling

Primary or Secondary:

Use Factor:

Workload Distribution:

Number of Patients / Week:

Scatter Direction:

Use Table / Bucky Preshielding? :

Under-Table Fluoro Tube

Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter

Distance to Protected Location: 12.0 ft 12.0 ft Unshielded Air Kerma (mGy/wk): 2.69E-02 9.87E-01

Other Material Tranmission: 1.00E+00 1.00E+00 Remaining Air Kerma (mGy/wk): 2.69E-02 9.87E-01

Transmission Model: Secondary Secondary Preshielding Credit: N/A

Existing Material Tranmission: 9.50E-03 9.50E-03 Shielded Air Kerma (mGy/wk): 0.0003 0.0094

Other Existing Material: Material:

Structual Material Required: 2.34 in Material:

Existing Structural Materal: 3.00 in Material: Shielded Air Kerma (mGy/wk): 0.0096Concrete

N/A

Fluoro (R&F)

Fwd/Back

Concrete

Ceiling

Secondary N/A

7/13/2018 VA Loma Linda Procedure 3D-72 C-Arm-18.xlsm

Protected Location: Floor

Primary or Secondary:

Use Factor:

Workload Distribution:

Number of Patients / Week:

Scatter Direction:

Use Table / Bucky Preshielding? :

Under-Table Fluoro Tube

Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter

Distance to Protected Location: 12.0 ft 12.0 ft Unshielded Air Kerma (mGy/wk): 2.69E-02 9.87E-01

Other Material Tranmission: 1.00E+00 1.00E+00 Remaining Air Kerma (mGy/wk): 2.69E-02 9.87E-01

Transmission Model: Secondary Secondary Preshielding Credit: N/A

Existing Material Tranmission: 9.50E-03 9.50E-03 Shielded Air Kerma (mGy/wk): 0.0003 0.0094

Other Existing Material: Material:

Structual Material Required: 2.34 in Material:

Existing Structural Materal: 3.00 in Material: Shielded Air Kerma (mGy/wk): 0.0096Concrete

N/A

Fluoro (R&F)

Fwd/Back

Concrete

Secondary Floor

Secondary N/A

7/13/2018 VA Loma Linda Procedure 3D-72 C-Arm-18.xlsm

StevenLappy Typewritten Text Sleep Room

StevenLappy Typewritten Text Corridor

StevenLappy Typewritten Text Holding Ante-Room

StevenLappy Typewritten Text Balcony - No Occupants within 20 ft

StevenLappy Rectangle

StevenLappy Typewritten Text Northwest Corner

StevenLappy Typewritten Text Wash Station

StevenLappy Typewritten Text Assumed:

5 ft x 5 ft Area C-Arm Exposure

StevenLappy Line

StevenLappy Line

StevenLappy Line

StevenLappy Line

StevenLappy Line

StevenLappy Line

StevenLappy Line

StevenLappy Line

StevenLappy Line

StevenLappy Line

StevenLappy Text Box 2# Lead

StevenLappy Text Box 2# Lead

StevenLappy Text Box 2# Lead

StevenLappy Text Box 2# Lead

StevenLappy Text Box 2# Lead

StevenLappy Text Box 2# Lead -Doors

StevenLappy Text Box Project: VA Loma Linda Procedure Room 3D-72, Mobile C-Arm Date: July 13, 2018 Version 2.0 Assumes:

-2 hours per week fluoro-on time -Mobile C-Arm used within 5x5 ft box centered in room -At least 12 ft floor-to-floor height, at least 2 inches concrete in floor and ceiling -North Wall contains at least 1.75 inch Gypsum and 0.5 inch plate glass 2# / sq ft lead = 1/32 inch lead

StevenLappy Text Box No additional shielding required; existing plate glass window and gypsum wallboard is sufficient

StevenLappy Line

StevenLappy Line

StevenLappy Line

StevenLappy Text Box Additional Glass or 2# equivalent Leaded Glass required