HomeMy WebLinkAboutB17-0092_PHYSICIST BASE BID_1491499642.pdf
December 30, 2016
KC Baker, MBA, RN
Director – Cath Lab & Diagnostic Imaging
Vail Valley Medical Center
180 South Frontage Road
PO Box 40,000
Vail, Colorado 81658
Dear Sir,
Enclosed are the following regulatory compliance reports (Part 4.15) documents for the new
Nuclear Medicine Suite at Vail Valley Medical Center, Vail, Colorado:
RH 4.15 Regulatory Compliance Report – Nuclear Medicine Camera (105A)
RH 4.15 Regulatory Compliance Report – Hot Lab (104B)
RH 4.15 Regulatory Compliance Report – Injection Area
Based on your direction to move the existing Siemens e.cam Signature gamma camera and the
existing program to the new space, no addition lead shielding is required for any of the barriers
in the suite. The existing localized shielding for the hot lab will be moved to the new area.
This analysis is based on information, both written and oral, provided by yourself and Ryan
Collier, Senior Architect, Davis Partnership Architects. The NM suite plan sent to me on
12/09/16 is the final plan I used for the design.
In this design, I followed the methods outlined by NCRP Report No. 147. The goal was to shield
to 0.02 mGy per week air kerma (1 mGy/year) in uncontrolled areas and 0.1 mGy per week air
kerma (5 mGy/year) in controlled areas.
If you have any questions, please feel free to call.
Sincerely,
Joel McAllister, M.S., DABR, CHP, DABSNM
Centennial Medical Physics, LLC
Qualified Expert #120363
(913) 579-6747 cell
LOCATION:Vail Valley Medical Center DATE:December 30, 2016
181 West Meadow Drive ROOM:Nuclear Medicine Camera (105A)
Vail, Colorado 81657 Worst Case Activity:25mCi of Tc-99m
License No.:CO 807-01
OCCUPANCY Exposure Rate in any Exposure Rate to
DIRECTION PROTECTED AREA1 FACTOR2 DISTANCE one hour (present continuously)member of general public
Corridor / Kimberly's Library
(unrestricted)
NM Control Area
(restricted)
Pt. Toilet / NM Suite Entrance
(unrestricted)
Janitor's Closet / Restroom
(unrestricted)
Clinical Area
(unrestricted)
Clinical Area
(unrestricted)
1 This area is considered to be the nearest area where a member of the general public is found.
2 Occupancy factors are assigned per Table 4.1 in NCRP 147 ("Structural Shielding Design for Medical X-Ray Imaging Facilities")
COMMENTS
CALCULATIONS PERFORMED BY:__________________________________________(signed electronically)
Joel McAllister, M.S., DABR, CHP
1.00
0.20
0.0969 mrem/hour
0 mrem/hour
10 feet
15 feet
15 feet
45.42 mrem/year
74.1 mrem/year
45.42 mrem/year
0.0494 mrem/hour
0.1514 mrem/hour
29.07 mrem/year
0 mrem/year
0 mrem/year
RH4.15 REGULATORY COMPLIANCE REPORT
East
North
South
0.20 0.1514 mrem/hour8 feet
14 feet
8 feet
0.20
1.00
West
Ceiling
Floor 0 mrem/hour1.00
The calculations below demonstrate that the new Imaging Room at Vail Valley Medical Center will meet the requirements of RH 4.14 and
RH 4.15 of the State of Colorado Rules and Regulations Pertaining to Radiation Control.
The most common situation was identified to be a patient containing 25 mCi or less of Tc-99m for a diagnostic study in the imaging room.
For a high workload scenario, I assume a patient containing 25 mCi of Tc-99m will be present in the scanner room 45 minutes per hour, 8
hours per day.
I assume that patient attenuation offers about one half-value-layer of reduction in this analysis. Scanner shielding, while significant, was
not taken into account.
The results above demonstrate compliance with RH 4.14 and RH 4.15.
LOCATION:Vail Valley Medical Center DATE:December 30, 2016
181 West Meadow Drive ROOM:Hot Lab (104B)
Vail, Colorado 81632 Worst Case Activity:25mCi of Tc-99m
License No.:CO 807-01
OCCUPANCY Exposure Rate in any Exposure Rate to
DIRECTION PROTECTED AREA1 FACTOR2 DISTANCE one hour (present continuously)member of general public
NM Control Area
(restricted)
Corridor
(unrestricted)
Corridor
(unrestricted)
Injection / NM Corridor
(unrestricted)
Clinical Area
(unrestricted)
Clinical Area
(unrestricted)
1 This area is considered to be the nearest area where a member of the general public is found.
2 Occupancy factors are assigned per Table 4.1 in NCRP 147 ("Structural Shielding Design for Medical X-Ray Imaging Facilities")
COMMENTS
CALCULATIONS PERFORMED BY:__________________________________________(signed electronically)
Joel McAllister, M.S., DABR, CHP
18.92 mrem/year
6.73 mrem/year
3.78 mrem/year
6.73 mrem/year
0 mrem/year
0 mrem/year
0.20
8 feet
6 feet
8 feet
West
Ceiling
Floor
RH4.15 REGULATORY COMPLIANCE REPORT
East
North
South
1.00
0.20
0.20
1.00
1.00
0.3027 mrem/hour
0.5382 mrem/hour
0.3027 mrem/hour
0.5382 mrem/hour
0 mrem/hour
0 mrem/hour
6 feet
15 feet
15 feet
The calculations below demonstrate that the new Hot Lab at Vail Valley Medical Center will meet the requirements of RH 4.14 and RH
4.15 of the State of Colorado Rules and Regulations Pertaining to Radiation Control.
The most common exposure situation was identified to be the daily drawing/mixing/assaying of Tc-99m dosages throughout the work day.
For this high workload situation, I assumed a 25 mCi Tc-99m product is in air 15 minutes per 8 hour day.
Localized lead shielding is used in the Hot Lab. While the L-shield, syringe shield, and lead bricks provide significant shielding for the
technologist and the surrounding areas, I did not account for this in the analysis.
The results above demonstrate compliance with RH 4.14 and RH 4.15.
LOCATION:Vail Valley Medical Center DATE:December 30, 2016
181 West Meadow Drive ROOM:Injection Area
Vail, Colorado 81657 Worst Case Activity:25mCi of Tc-99m
License No.:CO 807-01
OCCUPANCY Exposure Rate in any Exposure Rate to
DIRECTION PROTECTED AREA1 FACTOR2 DISTANCE one hour (present continuously)member of general public
NM Suite Corridor
(unrestricted)
Hot Lab
(unrestricted)
Corridor
(unrestricted)
NM Suite Corridor
(unrestricted)
Clinical Area
(unrestricted)
Clinical Area
(unrestricted)
1 This area is considered to be the nearest area where a member of the general public is found.
2 Occupancy factors are assigned per Table 4.1 in NCRP 147 ("Structural Shielding Design for Medical X-Ray Imaging Facilities")
COMMENTS
CALCULATIONS PERFORMED BY:__________________________________________(signed electronically)
Joel McAllister, M.S., DABR, CHP
0 mrem/hour1.00
0.20
1.00
West
Ceiling
Floor
RH4.15 REGULATORY COMPLIANCE REPORT
East
North
South
0.20 0.2691 mrem/hour6 feet
6 feet
6 feet
26.91 mrem/year
26.91 mrem/year
26.91 mrem/year
0.2691 mrem/hour
0.2691 mrem/hour
26.91 mrem/year
0 mrem/year
0 mrem/year
0.20
0.20
0.2691 mrem/hour
0 mrem/hour
6 feet
15 feet
15 feet
The calculations below demonstrate that the new Injection Area at Vail Valley Medical Center will meet the requirements of RH 4.14 and
RH 4.15 of the State of Colorado Rules and Regulations Pertaining to Radiation Control.
The most common situation was identified to be a patient being injected with 25 mCi or less of Tc-99m for a diagnostic study. For a high
workload scenario, I assume a patient will be injected with 25 mCi of Tc-99m and will be present in the uptake room 15 minutes per hour,
8 hours per day.
I assume that patient attenuation offers about one half-value-layer of reduction in this analysis.
The results above demonstrate compliance with RH 4.14 and RH 4.15.
ESR105CNUCLEARMEDICINECAMERA105ACONTROL104AHOT LAB104BDe015e01PT TOILET104CINJECTION104DSOILED HOLD105B105C105B105A105D104B104AW1CARTLADDER104C