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NRC to add new items to categorical exclusions list
The Nuclear Regulatory Commission has identified five categories of action to add to its list of categorical exclusions to reduce its documentation work under National Environmental Policy Act (NEPA) procedures.
These revisions are included in the final rule, “Categorical exclusions from environmental review,” which was published in the Federal Register on March 30. The final rule will become effective on April 29.
Stephen W. Webb
Nuclear Technology | Volume 39 | Number 1 | June 1978 | Pages 41-45
Nuclear Safety Analysis | Energy Modeling and Forecasting / Reactor | doi.org/10.13182/NT78-A17006
Articles are hosted by Taylor and Francis Online.
The decrease in containment pressure following inadvertent actuation of the containment sprays has been evaluated. The depressurization occurs in two definite phases involving the short-term depressurization due to mass transport and the long-term depressurization due to heat transfer. Either phase may determine the maximum depressurization. Simple models may overestimate the maximum depressurization by 50% or more; therefore, transient models are needed to avoid unnecessary conservatism.
