Criteria for applicability

The criteria for application and performance characteristics of blowdown drums, cyclone separators, and quench tanks are discussed as follows. 

It should be noted that the above maximum radiant heat density criteria for application to inadvertently ignited atmospheric releases from pressure relief valves or vents are less restrictive than those used for flare design. This results from the fact that flares are continuously ignited, whereas ignition of a relieving PR valve is unlikely. In addition, the area surrounding a flare is open and offers no protection, while within a process unit access to shelter is available. 

These performance curves reflect the general characteristics of various fans as commonly employed. They are not intended to provide (he complete selection criteria for application purposes, since other parameters >uch as diameter, speed, etc. are not defined. 

Radiation resistance of the material used as well as commercial availability of the membrane units and auxiliary equipment, process competitiveness in comparison with conventional methods, its economics and feasibdity are important criteria for application of the membranes for radioactive waste processing. 

The value of Dl, the longitudinal dispersion coefficient, is subject to a great deal more variability and much less certainty in selection. Table I shows typical values obtained experimentally. The variation illustrates the range of physical phenomena operative at different sites. In addition, however, it should be noted that in some instances the data reported here or elsewhere may not have met the criteria for application of the one-dimensional equation. Data in Table I were adopted from Fischer (27) and Liu (59). 

Work Group ANS-8.13.1 of American Nuclear Society (ANS) Standard Subcommittee, 8 is currently writing a consensus standard for use of the solid angle technique. The Standard will state the requirements for establishing a solid angle method and the criteria for application of that method. 

B. PROCEDURE AND CRITERIA FOR APPLICABILITY OF THE METHOD OF REDUCED VARIABLES... 

This section includes some basic safety concepts developed with the aim of grading the design criteria for application to siting and design of research reactors in relation to external events according to the hazard they pose to workers, the public and the environment. In the following, reference is made to the basic steps of the safety assessment process, as described in Ref [15]. 

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