A measurement system for Rn decay product lung deposition based on respiratory models

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Health Physics; (USA)

DOI:https://doi.org/10.1097/00004032-199003000-00007· OSTI ID:6853169

Hopke, P K; Ramamurthi, M; Knutson, E O ^[1]

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1. Univ. of Illinois, Urbana-Champaign (USA)

Using models of particle deposition in the nasal cavity and in the tracheobronchial region of the respiratory tract, it is possible to design a measurement system based on wire screen penetration theory. This system provides direct estimates for the quantities of Rn decay product activity deposited in the nasal cavity and in the tracheobronchial region. Historically, measurements of the unattached fraction of the airborne Rn decay product size distribution have been made in order to better estimate the dose resulting from the deposition of these {sup 222}Rn progeny in the human respiratory tract. However, previous measurement systems have been developed based on choices of screen parameters and sampling flow conditions in an attempt to separate the unattached fraction from the rest of the activity size distribution. By taking into consideration the deposition behavior of particles in the respiratory tract, a specific choice of wire screens and flow rates can be made that can provide better information for the estimation of deposited dose in the respiratory tract.

• OSTI ID: 6853169
• Journal Information: Health Physics; (USA), Journal Name: Health Physics; (USA) Vol. 58:3; ISSN 0017-9078; ISSN HLTPA
• Country of Publication: United States
• Language: English

Related Subjects

560161* -- Radionuclide Effects
Kinetics
& Toxicology-- Man
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AEROSOLS
AIR POLLUTION
ALPHA DECAY RADIOISOTOPES
ANIMALS
BODY
COLLOIDS
DAUGHTER PRODUCTS
DAYS LIVING RADIOISOTOPES
DISPERSIONS
DOSES
EVEN-EVEN NUCLEI
HEAVY NUCLEI
INHALATION
INTAKE
ISOTOPES
LUNGS
MAMMALS
MAN
MATHEMATICAL MODELS
NUCLEI
ORGANS
PARTICLE SIZE
POLLUTION
PRIMATES
RADIATION DOSES
RADIOACTIVE AEROSOLS
RADIOISOTOPES
RADIONUCLIDE KINETICS
RADON 222
RADON ISOTOPES
RESPIRATION
RESPIRATORY SYSTEM
RETENTION
SIZE
SOLS
VERTEBRATES