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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Deep Space: The new frontier of radiation controls
In commercial nuclear power, there has always been a deliberate tension between the regulator and the utility owner. The regulator fundamentally exists to protect the worker, and the utility, to make a profit. It is a win-win balance.
From the U.S. nuclear industry has emerged a brilliantly successful occupational nuclear safety record—largely the result of an ALARA (as low as reasonably achievable) process that has driven exposure rates down to what only a decade ago would have been considered unthinkable. In the U.S. nuclear industry, the system has accomplished an excellent, nearly seamless process that succeeds to the benefit of both employee and utility owner.
Toshiaki Ohe, Akira Nakaoka
Nuclear Technology | Volume 61 | Number 3 | June 1983 | Pages 540-546
Technical Paper | New Directions in Nuclear Energy with Emphasis on Fuel Cycles / Radiation Biology and Environment | doi.org/10.13182/NT83-A33179
Articles are hosted by Taylor and Francis Online.
A generalized equation for adsorption of 131I2 gas on geological material was used. Adsorption parameters for typical Japanese geological materials such as granite, tuff, and sandstone are evaluated as a function of temperature and surface area of rock material. Crushed sample investigations have been performed by the column technique at various steps of temperature and gas concentration. The results indicate that the isosteric differential heat of adsorption is in the range of 63 to 92 KJ / mol at 20°C and that the adsorption coefficient depends on temperature and concentration. Water vapor in 131I2 gas also affects the coefficient, which corresponds to the surface roughness of geological material. A generalized equation is derived on the basis of considering the size distribution of geological materials in order to evaluate the adsorption coefficients at various temperatures. By using this equation, the coefficients of intrafault materials in Japanese granite formations are evaluated at ∼103 cm3/g.
