Document Details
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(527 K)
Title:
CLEARANCE OF RADIOACTIVE DUST FROM THE HUMAN LUNG ( A.M.A. ARCHIVES OF INDUSTRIAL HEALTH JULY 1955, VOL. 12, PP 99-106 )
Author(s):
Subject Terms:
HREX
Document Location:
Location - DOE/NNSA NUCLEAR TESTING ARCHIVE Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - NTA@NV.DOE.GOV
Document Type:
JOURNAL ARTICLE
Publication Date:
1955 Jul 31
Declassification Status:
Never classified
Document Pages:
0008
Accession Number:
NV0703502
OpenNet Entry Date:
1994 Aug 27
OpenNet Modified Date:
2012 May 14
Description/Abstract:
THE EFFECTIVE HALF-LIFE OF THORON DAUGHTERS IN THE LUNG FOLLOWING DEPOSITION, TOGETHER WITH KAOLIN PARTICLES OF MASS-MEDIAN DIAMETER 1.1 MICRON - 1.3 MICRON, IS ABOUT NINE HOURS. THIS INDICATES THAT THE PULMONARY CLEARANCE OF RADON AND THORON DAUGHTERS UNDER THESE CONDITIONS WILL NOT MATERIALLY REDUCE THE RADIATION HAZARD FOLLOWING INHALATION. THE EARLY BRONCHIAL CLEARANCE OF RADIOACTIVE IRON PARTICLES APPEARS TO HAVE TWO PHASES: THE FIRST CLEARANCE PERIOD ENDS IN 2 TO 4 HOURS AND THE SECOND IN ABOUT 30 HOURS. THE LARGER THE AVERAGE INHALED PARTICLE SIZE, THE GREATER THE FRACTION REMOVED IN TWO TO FOUR HOURS.