Charcoal Performance under Simulated Accident Conditions.
Abstract
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. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1982
- Accession Number
- ADA116280
Entities
People
- Victor R. Deitz
Organizations
- United States Naval Research Laboratory