Charcoal performance under simulated accident conditions. Memorandum report

Technical Report · Wed Jun 30 04:00:00 EDT 1982

OSTI ID:6767682

Deitz, V R

Regulatory Guide 1.52 stipulates a radiation level for iodine buildup on the adsorber of 10 to the 9th power rads as one of the typical accident conditions for atmospheric clean up systems. The laboratory research in progress seeks to study the combined effects of in-service weathering, exposure to atmosphere contaminants, and radiation doses on the retention of iodine by the carbon. A number of service and weathered carbons have been exposed to the gamma-radiation from the Co 60 source (approximately 1 MeV) and to the radiation from the NRL LINAC facility (approximately 45 MeV). Total radiation levels of 10 to the 7th, 8th, and 9th power rads were used and the carbons were evaluated before and after irradiation by the methyliodide-131 penetration test (30 C, ASTM-3803-79). Surprising improvements were observed after static (i.e. no air flow) exposures of the carbons to the irradiation. Flow-through exposures during irradiation are now in progress using air or argon flows and with or without methyliodide-127.

• Research Organization: Naval Research Lab., Washington, DC (USA)
• OSTI ID: 6767682
• Report Number(s): AD-A-116280/9
• Country of Publication: United States
• Language: English

Related Subjects

500300* -- Environment
Atmospheric-- Radioactive Materials Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION
ACCIDENTS
ADSORBENTS
AIR CLEANING
ARGON
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON
CHARCOAL
CLEANING
CONTAMINATION
DAYS LIVING RADIOISOTOPES
DOSES
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUIDS
GAMMA RADIATION
GASES
HALOGENS
INTERMEDIATE MASS NUCLEI
IODINE
IODINE 127
IODINE 131
IODINE ISOTOPES
IONIZING RADIATIONS
IRRADIATION
ISOTOPES
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
RADIATION ACCIDENTS
RADIATION DOSES
RADIATIONS
RADIOISOTOPES
RARE GASES
STABLE ISOTOPES
WEATHERING