HVAC REQUIREMENTS IN NUCLEAR MEDICINE
(REFER TO VA DESIGN GUIDE, NUCLEAR MEDICINE FOR ADDITIONAL INFORMATION)
1. Indoor Design Conditions:
Area
Summer
Winter
HVAC Design
Degree C
Degree C
Manual Ref.
(Degree F)
(Degree F)
Imaging Room
25 (78) 50% RH
22 (72) 30% RH
Table 1-1
(Exam Room)
Storage & Prep. (Radio-
25 (78) 50% RH
22 (72) 30% RH
Table 1-1
pharmacy Lab or Hot Lab)
2. Maintain NC-40 in all areas.
1.3.12
3. Dedicated air handling unit for Nuclear Medicine
2.2.10
4. Filtration: Pre-filters 30%, and After-filters 85%
Table 2-1
5. See VA Design Guide for areas such as Imaging Units with single
and double head cameras,Radio-pharmacy, Thyroid Uptake,
Computer Image and data processing, Non-Imaging Procedure
Rooms with alternate exercise rooms, Radio-immunoassay
Unit,and Employee Bio-safety rooms.
6. Maintain negative pressure with 100% exhaust from Imaging room,
4.12
and Storage and Preparation room. No re-circulation of air is
permitted from these spaces. Radio-active Xenon gas (Xe -133) is
used in these spaces and it requires special ventilation.
7. Storage and Preparation Room is provided with H-3 radioisotope
2.11 and 4.12
hood.
8. Emergency power requirements for Xenon gas exhaust fan and H-
2.16.2
3 hood exhaust fan.
Contact Satish Sehgal @ 202-565-5032, Kurt Knight @ 202-565-4663, Don Walden 202-565-5014 or Sat
Gupta @ 202-565-5268 for additional information.
September 2001
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