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NRC proposed rule for licensing reactors authorized by DOE, DOD
Nuclear reactor designs approved by the Department of Energy or Department of Defense could get streamlined pathways through the Nuclear Regulatory Commission’s commercial licensing process should applicants wish to push the technology into the civilian sector.
A proposed rule introduced April 2 by the NRC would “improve NRC licensing review efficiency, where applicable, by explicitly establishing by regulation an additional means for reactor applicants to demonstrate the safety functions of their reactor designs, and thus, would contribute to the safe and secure use and deployment of civilian nuclear energy technologies.”
Jungsook Clara Wren, Chris J. Moore
Nuclear Technology | Volume 94 | Number 2 | May 1991 | Pages 242-251
Technical Paper | Advances in Reactor Accident Consequence Assessment / Material | doi.org/10.13182/NT91-A34545
Articles are hosted by Taylor and Francis Online.
Triethylenediamine (TEDA) impregnated charcoals, used in nuclear reactors to safeguard against the release of airborne radioiodine, show high efficiency under various reactor operation and accident conditions when they are new. However, during normal operation, charcoal filters are continuously degraded (or weathered) due to the adsorption of moisture and other air contaminants. The effect of weathering on the efficiency of charcoal for removing radioiodine is of great interest. The results of a study on the adsorption behavior of various contaminants {NO2, SO2, 2-butanone [methyl-ethyl ketone (MEK)], and NH3} on TEDA charcoal are presented. This study is an attempt to characterize and quantify the weathering process of TEDA charcoal by these contaminants. The adsorption and desorption of characteristics of these contaminants range from completely irreversible (NO2) to completely reversible (NH3). The effect of adsorbed water (or humidity) on adsorption is different for each contaminant. Adsorbed water increases the adsorption rate and capacity of TEDA charcoal for NO2, while it does not significantly change those for SO2. However, it appears that SO2 is adsorbed as H2SO4 on the wet charcoal. Adsorbed water slightly reduces the adsorption capacity of the charcoal for MEK, but does not affect the adsorption of NH3.
