VALomaLinda-EmergCT-Xray-ShieldPlan-20 (003).pdf
PDF 2 MB Posted
- Solicitation number
- 36C25821B0002_1
About this file
This document includes a federal contract opportunity solicitation for construction services to complete a Radiology Suite with CT Scanner and X-Ray Rooms in the Emergency Department at a Veterans Affairs medical center. The solicitation seeks general construction and alteration services per the attached statement of work, drawings, and specifications to demolish and replace elements as required. The period of performance is 180 calendar days from notice to proceed. The magnitude of the project is estimated between $1,000,000 and $2,000,000. The NAICS code is 236220 for commercial and institutional building construction. The small business size standard is $36.5 million. Offerors must be registered in the System for Award Management and VetBiz Vendor Information Pages. The solicitation is issued by the Department of Veterans Affairs Veterans Health Administration Veterans Integrated Service Network 22.
View the file
Other files
Show all 19
On GovTribe
Work with this file
- Download the original file
- Contacts named in this file
- Similar government files
- Ask GovTribe AI about this file
Text version
Radiation Protection Shielding Design
Facility: VA Loma Linda Medical Center
Address: 11201 Benton Street, Loma Linda, CA 92357
Contact: Brian Collins (bcollins@c-aarchitects.com) Signature:
Room ID: CT Scan 1A-277 Date: April 1, 2020
CT Scanner Type: Siemens Somatom Force
Calculation Method: NCRP 147
Head Scan Body Scan
Patients / Week: 60 90
Scan Length: 20 50 cm
Pitch: 1 1 mAs: 300 200 kVp: 120 120
CTDI100: 14.800 6.550 mGy/ 100 mAs
Air Kerma at 1 m: 0.151 0.334 mGy/Patient
Barrier Requirements Summary
Existing Recommended Shielded
Structural Additional P/T Air Kerma
Protected Location Material Barrier (mGy/wk) (mGy/wk)
Control Room 1A-275 4 / 64ths inch lead 0.02 0.0064
CT Control Door 1.5 in wood 4 / 64ths inch lead 0.02 0.0043
X-Ray 1A-276 1.25 in gypsum 4 / 64ths inch lead 0.02 0.0081
Corridor Doors 1.5 in wood 4 / 64ths inch lead 0.16 0.0101
Corridor C1-06 1.25 in gypsum 4 / 64ths inch lead 0.1 0.0108
Adj Exam Rm 1A-117 2.5 in gypsum 2 / 64ths inch lead 0.04 0.0132
Wash Rm 1A-403 1.25 in gypsum 4 / 64ths inch lead 0.1 0.0089
Equip Rm 1A-275B 1.25 in gypsum 4 / 64ths inch lead 0.4 0.0043
Adj Psych Exam Rm 1A-228 2.5 in gypsum 2 / 64ths inch lead 0.04 0.0074
Ceiling (Offices above) 5.6 in lt concrete 0.0 - n/a 0.02 0.0166
Floor (No Occup - Slab-on-grade) 6.0 in concrete 0.0 - n/a N/A N/A
Physicist:
Petar Seslija, M.S., MCCPM Certified Radiological Physicist Therapy Physics, Inc.
2501 Cherry Ave, Ste 270, Signal Hill, CA 90755
562.317.0650, FAX 562.317.0661
e-mail: petar@therapyphysics.com
From Siemens provided scatter map:
Air Kerma at 1 m is 0.304 uGy/mAs for 150 kV scan at max collimation of
57.6 mm using 32 cm CTDI phantom.
Assume: (120/150)^2 kV correction factor, and (1/5.76 cm) collimation correction. CTDI for default head/abdo protocols is 47.3/9.8 mGy for 320/150 mAs.
Summary
4/1/2020
VALomaLinda-EmergCT-Shield-20
Therapy Physics, Inc.
562-317-0650
Comments and Recommendations
1. This is a shielding report for a Siemens Somatom Force CT scan room to be installed on the first floor of a multi-story building. The first floor structural deck consists of 6 inches of concrete slab-on-grade. Therefore there is no occupancy below the CT room. There are fully occupied areas above the CT scan room. The 2nd floor structural deck consists of a 4-3/16 inch light-weight concrete slab on top of a metal deck with 3 inch deep flutes. Therefore the average thickness of the 2nd floor deck is 5.6 inches of light-weight concrete. The distance between the first floor and the second floor is 18 feet. No additional lead shielding is required for the ceiling or floor of the CT scan room.
2. All additional lead shielding in the walls will be added to a height of 7 feet (84 inches) to comply with requirements of Title 17, CA Code of Regulations.
3. 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.
4. The additional shielding recommendations are designed to meet Radiation Protection Standards as defined by 10 CFR20. Any future changes in either equipment, workload or room design will necessitate a re-evaluation of these shielding requirements.
5. The following assumptions were used in the shielding calculations:
Head CT Workload: 60 patients per week (Busy Patient Work Load).
Body CT Workload: 90 patients per week (Busy Patient Work Load).
6. All junction boxes and other penetrations in lead lined walls must be lined with equivalent thickness of lead with overlapping lead edges. (No gaps in lead lining)
7. Door frames must be steel with lead lining to provide equivalent shielding to the surrounding walls.
For lead thickness's of 1/32 inch or less, the steel door frames do not need lead lining. For doors in walls with lead thickness's of 1/16 or greater, the steel door frames must be lead lined with the same thickness of lead as is in the wall.
8. Control Area window should be of at least 1.58 mm lead.
9. Equivalent thicknesses of lead for existing walls and floors is assumed to be as follows:
2 #/sq ft lead = 0.79 mm = 1/32 inch 4 #/sq ft lead = 1.58 mm = 1/16 inch 6 #/sq ft lead = 2.38 mm = 3/32 inch.
Comments
4/1/2020
VALomaLinda-EmergCT-Shield-20
Protected Locaton: Control Room 1A-275
Design Goal (P) (mGy/wk): 0.02 Occupancy (T): 1
Barrier Type: P/T (mGy/wk): 0.020
Primary or Secondary:
Use Factor:
kVp:
Number of Patients / Week:
Scatter Direction:
Table / Bucky Credit:
Head Body
Distance to Protected Location: 15.0 ft 15.0 ft
Unshielded Air Kerma (mGy/wk): 4.33E-01 1.44E+00
Structural Material Tranmission: 1.00E+00 1.00E+00
Remaining Air Kerma (mGy/wk): 4.33E-01 1.44E+00
Transmission Model: Secondary Secondary
Preshielding Credit: N/A N/A
Rec + Preshield Transmission: 3.40E-03 3.40E-03
Shielded Air Kerma (mGy/wk): 0.0015 0.0049
Existing Structural Material: Material:
Additional Barrier Required: 1.15 mm Material:
Recommended Additional Barrier: 1.59 mm Material: ( 4 / 64ths inch )
Shielded Air Kerma (mGy/wk): 0.0064
Lead
Lead
N/A N/A
Secondary Wall
Secondary
N/A
Side
N/A
Secondary
60 90
Side
4/1/2020
VALomaLinda-EmergCT-Shield-20
Protected Locaton: CT Control Door
Barrier Type: P/T (mGy/wk): 0.020
Primary or Secondary:
Use Factor:
kVp:
Number of Patients / Week:
Scatter Direction:
Table / Bucky Credit:
Head Body
Distance to Protected Location: 16.0 ft 16.0 ft
Unshielded Air Kerma (mGy/wk): 3.81E-01 1.26E+00
Structural Material Tranmission: 7.78E-01 7.78E-01
Remaining Air Kerma (mGy/wk): 2.96E-01 9.84E-01
Transmission Model: Secondary Secondary
Preshielding Credit: N/A N/A
Rec + Preshield Transmission: 3.40E-03 3.40E-03
Shielded Air Kerma (mGy/wk): 0.0010 0.0033
Existing Structural Material: 1.5 in Material:
Additional Barrier Required: 1.01 mm Material:
Recommended Additional Barrier: 1.59 mm Material: ( 4 / 64ths inch )
Shielded Air Kerma (mGy/wk): 0.0043
1.5 in wood
Secondary Wall
Lead
Lead
N/A N/A
Wood
60 90
Side Side
Secondary Secondary
120 120
N/A N/A
4/1/2020
VALomaLinda-EmergCT-Shield-20
Protected Locaton: X-Ray 1A-276
Barrier Type: P/T (mGy/wk): 0.020
Primary or Secondary:
Use Factor:
kVp:
Number of Patients / Week:
Scatter Direction:
Table / Bucky Credit:
Head Body
Distance to Protected Location: 11.0 ft 11.0 ft
Unshielded Air Kerma (mGy/wk): 8.06E-01 2.67E+00
Structural Material Tranmission: 6.83E-01 6.83E-01
Remaining Air Kerma (mGy/wk): 5.50E-01 1.83E+00
Transmission Model: Secondary Secondary
Preshielding Credit: N/A N/A
Rec + Preshield Transmission: 3.40E-03 3.40E-03
Shielded Air Kerma (mGy/wk): 0.0019 0.0062
Existing Structural Material: 1.25 in Material:
Additional Barrier Required: 1.24 mm Material:
Recommended Additional Barrier: 1.59 mm Material: ( 4 / 64ths inch )
Shielded Air Kerma (mGy/wk): 0.0081
1.25 in gypsum
Secondary Wall
Lead
Lead
N/A N/A
Gypsum
60 90
Side Side
Secondary Secondary
120 120
N/A N/A
4/1/2020
VALomaLinda-EmergCT-Shield-20
Protected Locaton: Corridor Doors
Design Goal (P) (mGy/wk): 0.02 Occupancy (T): 0.125
Barrier Type: P/T (mGy/wk): 0.160
Primary or Secondary:
Use Factor:
kVp:
Number of Patients / Week:
Scatter Direction:
Table / Bucky Credit:
Head Body
Distance to Protected Location: 10.5 ft 10.5 ft
Unshielded Air Kerma (mGy/wk): 8.84E-01 2.94E+00
Structural Material Tranmission: 7.78E-01 7.78E-01
Remaining Air Kerma (mGy/wk): 6.88E-01 2.28E+00
Transmission Model: Secondary Secondary
Preshielding Credit: N/A N/A
Rec + Preshield Transmission: 3.40E-03 3.40E-03
Shielded Air Kerma (mGy/wk): 0.0023 0.0078
Existing Structural Material: 1.5 in Material:
Additional Barrier Required: 0.61 mm Material:
Recommended Additional Barrier: 1.59 mm Material: ( 4 / 64ths inch )
Shielded Air Kerma (mGy/wk): 0.0101
1.5 in wood
Secondary Wall
Lead
Lead
N/A N/A
Wood
60 90
Side Side
Secondary Secondary
120 120
N/A N/A
4/1/2020
VALomaLinda-EmergCT-Shield-20
Protected Locaton: Corridor C1-06
Design Goal (P) (mGy/wk): 0.02 Occupancy (T): 0.2
Barrier Type: P/T (mGy/wk): 0.100
Primary or Secondary:
Use Factor:
kVp:
Number of Patients / Week:
Scatter Direction:
Table / Bucky Credit:
Head Body
Distance to Protected Location: 9.5 ft 9.5 ft
Unshielded Air Kerma (mGy/wk): 1.08E+00 3.59E+00
Structural Material Tranmission: 6.83E-01 6.83E-01
Remaining Air Kerma (mGy/wk): 7.38E-01 2.45E+00
Transmission Model: Secondary Secondary
Preshielding Credit: N/A N/A
Rec + Preshield Transmission: 3.40E-03 3.40E-03
Shielded Air Kerma (mGy/wk): 0.0025 0.0083
Existing Structural Material: 1.25 in Material:
Additional Barrier Required: 0.78 mm Material:
Recommended Additional Barrier: 1.59 mm Material: ( 4 / 64ths inch )
Shielded Air Kerma (mGy/wk): 0.0108
1.25 in gypsum
Secondary Wall
Lead
Lead
N/A N/A
Gypsum
60 90
Side Side
Secondary Secondary
120 120
N/A N/A
4/1/2020
VALomaLinda-EmergCT-Shield-20
Protected Locaton: Adj Exam Rm 1A-117
Design Goal (P) (mGy/wk): 0.02 Occupancy (T): 0.5
Barrier Type: P/T (mGy/wk): 0.040
Primary or Secondary:
Use Factor:
kVp:
Number of Patients / Week:
Scatter Direction:
Table / Bucky Credit:
Head Body
Distance to Protected Location: 21.0 ft 21.0 ft
Unshielded Air Kerma (mGy/wk): 2.21E-01 7.34E-01
Structural Material Tranmission: 4.67E-01 4.67E-01
Remaining Air Kerma (mGy/wk): 1.03E-01 3.42E-01
Transmission Model: Secondary Secondary
Preshielding Credit: N/A N/A
Rec + Preshield Transmission: 2.95E-02 2.95E-02
Shielded Air Kerma (mGy/wk): 0.0030 0.0101
Existing Structural Material: 2.5 in Material:
Additional Barrier Required: 0.47 mm Material:
Recommended Additional Barrier: 0.79 mm Material: ( 2 / 64ths inch )
Shielded Air Kerma (mGy/wk): 0.0132
2.5 in gypsum
Secondary Wall
Lead
Lead
N/A N/A
Gypsum
60 90
Side Side
Secondary Secondary
120 120
N/A N/A
4/1/2020
VALomaLinda-EmergCT-Shield-20
Protected Locaton: Wash Rm 1A-403
Design Goal (P) (mGy/wk): 0.02 Occupancy (T): 0.2
Barrier Type: P/T (mGy/wk): 0.100
Primary or Secondary:
Use Factor:
kVp:
Number of Patients / Week:
Scatter Direction:
Table / Bucky Credit:
Head Body
Distance to Protected Location: 10.5 ft 10.5 ft
Unshielded Air Kerma (mGy/wk): 8.84E-01 2.94E+00
Structural Material Tranmission: 6.83E-01 6.83E-01
Remaining Air Kerma (mGy/wk): 6.04E-01 2.01E+00
Transmission Model: Secondary Secondary
Preshielding Credit: N/A N/A
Rec + Preshield Transmission: 3.40E-03 3.40E-03
Shielded Air Kerma (mGy/wk): 0.0021 0.0068
Existing Structural Material: 1.25 in Material:
Additional Barrier Required: 0.72 mm Material:
Recommended Additional Barrier: 1.59 mm Material: ( 4 / 64ths inch )
Shielded Air Kerma (mGy/wk): 0.0089
1.25 in gypsum
Secondary Wall
Lead
Lead
N/A N/A
Gypsum
60 90
Side Side
Secondary Secondary
120 120
N/A N/A
4/1/2020
VALomaLinda-EmergCT-Shield-20
Protected Locaton: Equip Rm 1A-275B
Design Goal (P) (mGy/wk): 0.02 Occupancy (T): 0.05
Barrier Type: P/T (mGy/wk): 0.400
Primary or Secondary:
Use Factor:
kVp:
Number of Patients / Week:
Scatter Direction:
Table / Bucky Credit:
Head Body
Distance to Protected Location: 15.0 ft 15.0 ft
Unshielded Air Kerma (mGy/wk): 4.33E-01 1.44E+00
Structural Material Tranmission: 6.83E-01 6.83E-01
Remaining Air Kerma (mGy/wk): 2.96E-01 9.83E-01
Transmission Model: Secondary Secondary
Preshielding Credit: N/A N/A
Rec + Preshield Transmission: 3.40E-03 3.40E-03
Shielded Air Kerma (mGy/wk): 0.0010 0.0033
Existing Structural Material: 1.25 in Material:
Additional Barrier Required: 0.19 mm Material:
Recommended Additional Barrier: 1.59 mm Material: ( 4 / 64ths inch )
Shielded Air Kerma (mGy/wk): 0.0043
1.25 in gypsum
Secondary Wall
Lead
Lead
N/A N/A
Gypsum
60 90
Side Side
Secondary Secondary
120 120
N/A N/A
4/1/2020
VALomaLinda-EmergCT-Shield-20
Protected Locaton: Adj Psych Exam Rm 1A-228
Design Goal (P) (mGy/wk): 0.02 Occupancy (T): 0.5
Barrier Type: P/T (mGy/wk): 0.040
Primary or Secondary:
Use Factor:
kVp:
Number of Patients / Week:
Scatter Direction:
Table / Bucky Credit:
Head Body
Distance to Protected Location: 28.0 ft 28.0 ft
Unshielded Air Kerma (mGy/wk): 1.24E-01 4.13E-01
Structural Material Tranmission: 4.67E-01 4.67E-01
Remaining Air Kerma (mGy/wk): 5.80E-02 1.93E-01
Transmission Model: Secondary Secondary
Preshielding Credit: N/A N/A
Rec + Preshield Transmission: 2.95E-02 2.95E-02
Shielded Air Kerma (mGy/wk): 0.0017 0.0057
Existing Structural Material: 2.5 in Material:
Additional Barrier Required: 0.33 mm Material:
Recommended Additional Barrier: 0.79 mm Material: ( 2 / 64ths inch )
Shielded Air Kerma (mGy/wk): 0.0074
2.5 in gypsum
Secondary Wall
Lead
Lead
N/A N/A
Gypsum
60 90
Side Side
Secondary Secondary
120 120
N/A N/A
4/1/2020
VALomaLinda-EmergCT-Shield-20
Protected Locaton: Ceiling (Offices above)
Barrier Type: P/T (mGy/wk): 0.020
Primary or Secondary:
Use Factor:
kVp:
Number of Patients / Week:
Scatter Direction:
Table / Bucky Credit:
Head Body
Distance to Protected Location: 16.5 ft 16.5 ft
Unshielded Air Kerma (mGy/wk): 3.58E-01 1.19E+00
Structural Material Tranmission: 1.00E+00 1.00E+00
Remaining Air Kerma (mGy/wk): 3.58E-01 1.19E+00
Transmission Model: Secondary Secondary
Preshielding Credit: N/A N/A
Rec + Preshield Transmission: 1.07E-02 1.07E-02
Shielded Air Kerma (mGy/wk): 0.0038 0.0127
Other Existing Material: Material:
Structual Material Required: 5.35 in Material:
Existing Structural Materal: 5.60 in Material:
Shielded Air Kerma (mGy/wk): 0.0166
Ceiling
Lt Concrete
Lt Concrete
N/A N/A
60 90
Side Side
Secondary Secondary
120 120
N/A N/A
4/1/2020
VALomaLinda-EmergCT-Shield-20
Radiation Protection Shielding Design
Facility: VA Loma Linda Medical Center
Address: 11201 Benton Street, Loma Linda, CA 92357
Contact: Brian Collins (bcollins@c-aarchitects.com) Signature:
Room ID: X-Ray 1A-276 Date: April 1, 2020
Calculation Method: NCRP 147
Installation Type: Radiographic
Patients / Week: 160
Barrier Requirements Summary
Existing Structural Recommended P/T Shielded Air Kerma
Protected Location Material Additional Barrier (mGy/wk) (mGy/wk)
Control Rm 1A-275 4 / 64ths inch lead 0.02 0.0005
Control Rm Door 1.5 in wood 4 / 64ths inch lead 0.02 0.0004
Reading Room 1A-244 1.25 in gypsum 4 / 64ths inch lead 0.02 0.0002
Observation 1A-246 1.25 in gypsum 4 / 64ths inch lead 0.04 0.0009
Office 1A-248 1.25 in gypsum 4 / 64ths inch lead 0.02 0.0009
Corridor Doors 1.5 in wood 2 / 64ths inch lead 0.16 0.0055
Corridor (Chest Bucky Primary) 1.25 in gypsum 2 / 64ths inch lead 0.1 0.0178
CT Scan 1A-277 1.25 in gypsum 2 / 64ths inch lead 0.02 0.0059
Ceiling (Offices above) 5.6 in lt concrete 0.0 - n/a 0.02 0.0005
Floor (No Occup - Slab-on-grade) 6.0 in concrete 0.0 - n/a N/A N/A
Physicist:
Petar Seslija, M.S., MCCPM Certified Radiological Physicist Therapy Physics, Inc.
2501 Cherry Ave, Ste 270, Signal Hill, CA 90755
562.317.0650, FAX 562.317.0661
Summary 4/1/2020
VALomaLinda-EmergXray-Shield-20
Comments and Recommendations
1. This is a shielding report for an X-Ray room to be installed on the first floor of a multi-story building. The first floor structural deck consists of 6 inches of concrete slab-on-grade. Therefore there is no occupancy below the X-Ray room. There are fully occupied areas above the X-Ray room. The 2nd floor structural deck consists of a 4-3/16 inch light-weight concrete slab on top of a metal deck with 3 inch deep flutes. Therefore the average thickness of the 2nd floor deck is 5.6 inches of light-weight concrete. The distance between the first floor and the second floor is 18 feet. No additional lead shielding is required for the ceiling or floor of the X-Ray room.
2. All additional lead shielding in the walls will be added to a height of 7 feet (84 inches) to comply with requirements of Title 17, CA Code of Regulations.
3. 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.
4. The additional shielding recommendations are designed to meet Radiation Protection Standards as defined by 10 CFR20. Any future changes in either equipment, workload or room design will necessitate a re-evaluation of these shielding requirements.
5. The following assumptions were used in the shielding calculations:
X-ray Workload: 160 patients per week (Busy Patient Work Load).
6. All junction boxes and other penetrations in lead lined walls must be lined with equivalent thickness of lead with overlapping lead edges. (No gaps in lead lining)
7. Door frames must be steel with lead lining to provide equivalent shielding to the surrounding walls. For lead thickness's of 1/32 inch or less, the steel door frames do not need lead lining. For doors in walls with lead thickness's of 1/16 or greater, the steel door frames must be lead lined with the same thickness of lead as is in the wall.
8. Control Area window should be of at least 1.58 mm lead.
9. Equivalent thicknesses of lead for existing walls and floors is assumed to be as follows:
2 #/sq ft lead = 0.79 mm = 1/32 inch 4 #/sq ft lead = 1.59 mm = 1/16 inch 6 #/sq ft lead = 2.38 mm = 3/32 inch.
Comments 4/1/2020
VALomaLinda-EmergXray-Shield-20
Protected Location: Control Rm 1A-275
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? :
Rad Tube Secondary
Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter
Distance to Protected Location: 10.5 ft 10.5 ft
Unshielded Air Kerma (mGy/wk): 8.28E-03 5.31E-01
Structural Material Transmission: 1.00E+00 1.00E+00
Remaining Air Kerma (mGy/wk): 8.28E-03 5.31E-01
Transmission Model: Secondary Secondary
Preshielding Credit: N/A
Rec + Preshield Transmission: 9.50E-04 9.50E-04
Shielded Air Kerma (mGy/wk): 0.0000 0.0005
Existing Structural Material: Material:
Additional Barrier Required: 0.41 mm Material:
Recommended Additional Barrier: 1.59 mm Material: ( 4 / 64ths inch ) Shielded Air Kerma (mGy/wk): 0.0005
N/A
Secondary
All Barriers
Secondary Wall
Side
Lead
Lead
N/A
4/1/2020
VALomaLinda-EmergXray-Shield-20
Protected Location: Control Rm Door
Primary or Secondary:
Use Factor:
Workload Distribution:
Number of Patients / Week:
Scatter Direction:
Use Table / Bucky Preshielding? :
Rad Tube Secondary
Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter
Distance to Protected Location: 11.0 ft 11.0 ft
Unshielded Air Kerma (mGy/wk): 7.54E-03 4.84E-01
Structural Material Transmission: 7.50E-01 7.50E-01
Remaining Air Kerma (mGy/wk): 5.66E-03 3.63E-01
Transmission Model: Secondary Secondary
Preshielding Credit: N/A
Rec + Preshield Transmission: 9.50E-04 9.50E-04
Shielded Air Kerma (mGy/wk): 0.0000 0.0003
Existing Structural Material: 1.5 in Material:
Additional Barrier Required: 0.33 mm Material:
Recommended Additional Barrier: 1.59 mm Material: ( 4 / 64ths inch ) Shielded Air Kerma (mGy/wk): 0.0004
1.5 in wood
Secondary
N/A
Secondary Wall
Lead
Y
All Barriers
Wood
Side
Lead
4/1/2020
VALomaLinda-EmergXray-Shield-20
Protected Location: Reading Room 1A-244
Primary or Secondary:
Use Factor:
Workload Distribution:
Number of Patients / Week:
Scatter Direction:
Use Table / Bucky Preshielding? :
Rad Tube Secondary
Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter
Distance to Protected Location: 15.0 ft 15.0 ft
Unshielded Air Kerma (mGy/wk): 4.06E-03 2.60E-01
Structural Material Transmission: 6.45E-01 6.45E-01
Remaining Air Kerma (mGy/wk): 2.62E-03 1.68E-01
Transmission Model: Secondary Secondary
Preshielding Credit: N/A
Rec + Preshield Transmission: 9.50E-04 9.50E-04
Shielded Air Kerma (mGy/wk): 0.0000 0.0002
Existing Structural Material: 1.25 in Material:
Additional Barrier Required: 0.20 mm Material:
Recommended Additional Barrier: 1.59 mm Material: ( 4 / 64ths inch ) Shielded Air Kerma (mGy/wk): 0.0002
1.25 in gypsum
Secondary
N/A
Secondary Wall
Lead
N/A
All Barriers
Gypsum
Side
Lead
4/1/2020
VALomaLinda-EmergXray-Shield-20
Protected Location: Observation 1A-246
Design Goal (P) (mGy/wk): 0.02 Occupancy (T): 0.5 P/T (mGy/wk): 0.040 Barrier Type:
Primary or Secondary:
Use Factor:
Workload Distribution:
Number of Patients / Week:
Scatter Direction:
Use Table / Bucky Preshielding? :
Cross-Table Rad Tube Over-Table Rad Tube
Primary Leakage Scatter Leakage Scatter Leakage Scatter
Distance to Protected Location: 12.5 ft 11.5 ft 11.5 ft
Unshielded Air Kerma (mGy/wk): 5.16E+00 1.82E-03 3.00E-01
Structural Material Transmission: 5.87E-01 5.94E-01 5.94E-01
Remaining Air Kerma (mGy/wk): 3.03E+00 1.08E-03 1.78E-01
Transmission Model: Primary Secondary Secondary
Preshielding Credit: 0 N/A
Rec + Preshield Transmission: 2.65E-04 3.80E-04 3.80E-04
Shielded Air Kerma (mGy/wk): 0.0008 0.0000 0.0001
Existing Structural Material: 1.25 in Material:
Additional Barrier Required: 0.53 mm Material:
Recommended Additional Barrier: 1.59 mm Material: ( 4 / 64ths inch ) Shielded Air Kerma (mGy/wk): 0.0009
1.25 in gypsum
Primary Secondary
0.09 N/A
Cross-Table Lateral Wall
Lead
N N/A
Floor/Other Floor/Other
Gypsum
160 160
N/A Side
Lead
4/1/2020
VALomaLinda-EmergXray-Shield-20
Protected Location: Office 1A-248
Primary or Secondary:
Use Factor:
Workload Distribution:
Number of Patients / Week:
Scatter Direction:
Use Table / Bucky Preshielding? :
Cross-Table Rad Tube Over-Table Rad Tube
Primary Leakage Scatter Leakage Scatter Leakage Scatter
Distance to Protected Location: 12.5 ft 11.5 ft 11.5 ft
Unshielded Air Kerma (mGy/wk): 5.16E+00 1.82E-03 3.00E-01
Structural Material Transmission: 5.87E-01 5.94E-01 5.94E-01
Remaining Air Kerma (mGy/wk): 3.03E+00 1.08E-03 1.78E-01
Transmission Model: Primary Secondary Secondary
Preshielding Credit: 0 N/A
Rec + Preshield Transmission: 2.65E-04 3.80E-04 3.80E-04
Shielded Air Kerma (mGy/wk): 0.0008 0.0000 0.0001
Existing Structural Material: 1.25 in Material:
Additional Barrier Required: 0.68 mm Material:
Recommended Additional Barrier: 1.59 mm Material: ( 4 / 64ths inch ) Shielded Air Kerma (mGy/wk): 0.0009
1.25 in gypsum
Primary Secondary
0.09 N/A
Cross-Table Lateral Wall
Lead
N N/A
Floor/Other Floor/Other
Gypsum
160 160
N/A Side
Lead
4/1/2020
VALomaLinda-EmergXray-Shield-20
Protected Location: Corridor Doors
Design Goal (P) (mGy/wk): 0.02 Occupancy (T): 0.125 P/T (mGy/wk): 0.160 Barrier Type:
Primary or Secondary:
Use Factor:
Workload Distribution:
Number of Patients / Week:
Scatter Direction:
Use Table / Bucky Preshielding? :
Over-Table Rad Tube Chest Bucky Exams
Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter
Distance to Protected Location: 10.0 ft 10.0 ft 12.0 ft 6.0 ft
Unshielded Air Kerma (mGy/wk): 2.41E-03 3.96E-01 4.66E-03 2.34E-01
Structural Material Transmission: 7.40E-01 7.40E-01 7.64E-01 7.64E-01
Remaining Air Kerma (mGy/wk): 1.79E-03 2.93E-01 3.56E-03 1.79E-01
Transmission Model: Secondary Secondary Secondary Secondary
Preshielding Credit: N/A N/A
Rec + Preshield Transmission: 4.73E-03 4.73E-03 2.26E-02 2.26E-02
Shielded Air Kerma (mGy/wk): 0.0000 0.0014 0.0001 0.0040
Existing Structural Material: 1.5 in Material:
Additional Barrier Required: 0.09 mm Material:
Recommended Additional Barrier: 0.79 mm Material: ( 2 / 64ths inch ) Shielded Air Kerma (mGy/wk): 0.0055
1.5 in wood
Secondary Secondary
N/A N/A
Chest Bucky Secondary
Lead
N/A N/A
Floor/Other Chest Bucky
Wood
160 160
Side Side
Lead
4/1/2020
VALomaLinda-EmergXray-Shield-20
Protected Location: Corridor (Chest Bucky Primary)
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? :
Chest Bucky Exams
Primary Leakage Scatter Leakage Scatter Leakage Scatter
Distance to Protected Location: 12.0 ft
Unshielded Air Kerma (mGy/wk): 2.75E+01
Structural Material Transmission: 6.66E-01
Remaining Air Kerma (mGy/wk): 1.83E+01
Transmission Model: Primary
Preshielding Credit: 0.85 mm Lead
Rec + Preshield Transmission: 9.70E-04
Shielded Air Kerma (mGy/wk): 0.0178
Existing Structural Material: 1.25 in Material:
Additional Barrier Required: 0.16 mm Material:
Recommended Additional Barrier: 0.79 mm Material: ( 2 / 64ths inch ) Shielded Air Kerma (mGy/wk): 0.0178
1.25 in gypsum
Primary
Chest Image Receptor
Lead
Y
Chest Bucky
Gypsum
N/A
Lead
4/1/2020
VALomaLinda-EmergXray-Shield-20
Protected Location: CT Scan 1A-277
Primary or Secondary:
Use Factor:
Workload Distribution:
Number of Patients / Week:
Scatter Direction:
Use Table / Bucky Preshielding? :
Rad Tube Secondary
Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter
Distance to Protected Location: 7.5 ft 7.5 ft
Unshielded Air Kerma (mGy/wk): 1.62E-02 1.04E+00
Structural Material Transmission: 6.45E-01 6.45E-01
Remaining Air Kerma (mGy/wk): 1.05E-02 6.72E-01
Transmission Model: Secondary Secondary
Preshielding Credit: N/A
Rec + Preshield Transmission: 8.66E-03 8.66E-03
Shielded Air Kerma (mGy/wk): 0.0001 0.0058
Existing Structural Material: 1.25 in Material:
Additional Barrier Required: 0.46 mm Material:
Recommended Additional Barrier: 0.79 mm Material: ( 2 / 64ths inch ) Shielded Air Kerma (mGy/wk): 0.0059
1.25 in gypsum
Secondary
N/A
Secondary Wall
Lead
N/A
All Barriers
Gypsum
Side
Lead
4/1/2020
VALomaLinda-EmergXray-Shield-20
Protected Location: Ceiling (Offices above)
Primary or Secondary:
Use Factor:
Workload Distribution:
Number of Patients / Week:
Scatter Direction:
Use Table / Bucky Preshielding? :
Over-Table Rad Tube
Leakage Scatter Leakage Scatter Leakage Scatter Leakage Scatter
Distance to Protected Location: 13.5 ft 16.5 ft
Unshielded Air Kerma (mGy/wk): 5.01E-03 3.04E-01
Other Material Transmission: 1.00E+00 1.00E+00
Remaining Air Kerma (mGy/wk): 5.01E-03 3.04E-01
Transmission Model: Leakage Secondary
Preshielding Credit: N/A
Existing Material Tranmission: 2.13E-02 1.44E-03
Shielded Air Kerma (mGy/wk): 0.0001 0.0004
Other Existing Material: Material:
Structual Material Required: 1.49 in Material:
Existing Structural Materal: 5.60 in Material: Shielded Air Kerma (mGy/wk): 0.0005
Secondary
N/A
Ceiling
Lt Concrete
N/A
All Barriers
Fwd/Back
Lt Concrete
4/1/2020
VALomaLinda-EmergXray-Shield-20
| VALomaLinda-EmergCT-Shield-20 |
| VALomaLinda-EmergXray-Shield-20 |
| VALomaLinda-CT-Xray-Layout |
File details come from the government source that posted it. Updated .