High efficiency mixed species radioiodine air sampling, readout, and dose assessment system
Accidental releases of radioactivity from fission reactors will consist of active vapors or aerosols. Composition of the released plume will depend on the energy of release and fission product volatility. An apparatus is described that can efficiently (95 percent) collect organic or inorganic, particulate or gaseous /sup 131/I in the usual concentration range including that below stable atmospheric iodine, and under severe ambient conditions. Response to noble fission gases was reduced to less than 10/sup -4/ of an equal iodine airborne activity by heating the collector to approximately 120/sup 0/C in clean purging air flowing at .14 m/sup 3//min for 11 min. Reliable sample size, +-5 percent, was achieved by using a sample air flow regulator. Thyroid dose commitment was mathematically and graphically related to the iodine isotope distribution expected in the environment and to the response of the Civil Defense CDV-700 instrument used to evaluate the sample. Sensitivity of the method allows dose assessment of 1-2 rads to a child's thyroid.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- EY-76-C-02-0016 -
- OSTI ID:
- 7303045
- Report Number(s):
- BNL-22307; IAEA-SM-125/20; CONF-770220-3; TRN: 77-014031
- Resource Relation:
- Conference: International symposium on the handling of radiation accidents, Vienna, Austria, 2 Feb 1977
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
22 GENERAL STUDIES OF NUCLEAR REACTORS
AIR SAMPLERS
PERFORMANCE TESTING
IODINE 131
ENVIRONMENTAL TRANSPORT
REACTOR ACCIDENTS
RADIATION MONITORING
DOSE COMMITMENTS
HUMAN POPULATIONS
RADIATION DOSES
RADIOACTIVE AEROSOLS
RADIOACTIVE EFFLUENTS
SAMPLING
SURFACE AIR
THYROID
ACCIDENTS
AEROSOLS
AIR
AIR POLLUTION MONITORS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BODY
COLLOIDS
DAYS LIVING RADIOISOTOPES
DISPERSIONS
DOSES
ENDOCRINE GLANDS
FLUIDS
GASES
GLANDS
INTERMEDIATE MASS NUCLEI
IODINE ISOTOPES
ISOTOPES
LABORATORY EQUIPMENT
MASS TRANSFER
MONITORING
NUCLEI
ODD-EVEN NUCLEI
ORGANS
POPULATIONS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
RADIOISOTOPES
SAMPLERS
SOLS
TESTING
WASTES
500300* - Environment
Atmospheric- Radioactive Materials Monitoring & Transport- (-1989)
440101 - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments
220500 - Nuclear Reactor Technology- Environmental Aspects