Occupant UV Exposure Measurements for Upper-Room Ultraviolet Germicidal Irradiation

Details

• Alternative Title:
  J Photochem Photobiol B
• Personal Author:
  Milonova, Sonya ; Rudnick, Stephen ; McDevitt, James ; Nardell, Edward
• Description:
  The threshold limit value (TLV) guideline for ultraviolet (UV) radiation specifies that irradiance measurements to ensure occupant safety be taken over an angle of 80° at the sensor. The purpose of this study was to evaluate the effect of an 80° field of view (FOV) tube on lower room UV-C irradiation measurements. Measurements were made in an experimental chamber at a height of 1.73m with and without an FOV tube. The FOV tube reduced the lower room irradiance readings by 18-34%, a statistically significant reduction compared to the bare sensor. An 80° FOV tube should be used for lower room irradiance measurements to comply with the TLV guideline. The resulting lower readings would allow more UV-C radiation in the upper room without compromising occupant safety. More UV-C radiation in the upper room could increase efficacy of UVGI systems for reducing transmission of airborne infectious diseases. In addition, recommendations are made to standardize lower room irradiance measurement techniques.
• Subjects:
  Air Microbiology Anti-Infective Agents Bacteria Fungi Occupational Exposure Ultraviolet Rays
• Source:
  J Photochem Photobiol B. 159:88-92.
• Pubmed ID:
  27038734
• Pubmed Central ID:
  PMC4854786
• Document Type:
  Journal Article
• Funding:
  D43 TW009379/TW/FIC NIH HHS/United States ; R01 OH009050/OH/NIOSH CDC HHS/United States
• Volume:
  159
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:3e5a092cc29894fe1f96a52572d8203701d7f07da34dfc0d77b5c484914ed48f
• Download URL:
  https://stacks.cdc.gov/view/cdc/39295/cdc_39295_DS1.pdf
• File Type:
  [PDF - 224.56 KB ]