Consequence screening qualitative

It should be emphasized that qualitative consequence screening should only remove from further consideration those buildings where there is significant industry experience to support the assessment. In Example 5 cited above, a long and successful operating history exists to support the... 

Qualitative Consequence Screening Based on Site-Specific Conditions... 

Site-specific consequence screening for explosion can be performed either qualitatively or quantitatively, depending upon the explosion potential of the materials being handled, as well as processing conditions and other site-specific factors. In performing a consequence screening, it is necessary to select "Evaluation-case" events for consideration. This is defined as follows ... 

Qualitative frequency evaluation can be used to screen out events that are extremely unlikely to occur (i.e., have such a remote chance of occurring that further evaluation is unnecessary). This method is particularly appropriate for use in conjunction with qualitative consequence evaluation as a means of ranking risks. 

C -CP-MAS NMR provides subtle information about the degree of solvation of the polymer chains of a CFP in a given solvent and consequently it may be qualitatively correlated with the nanometer scale morphology of the polymer matrix. In fact, the prerequisite that enables a polymer framework to develop a nanoporosity is the ability of the polymer chains and its pendants to be suitably solvated by the liquid medium [26-28]. Therefore, C -CP-MAS NMR spectra provide the basis for a first level screening of the possibility of a CFP in a given solvent to be employed as an hexo-template, able to accommodate metal nanoclusters chemically produced in its interior (see below and Ref. [29]). 

The usual definition of chromatography as a method of separation does not imply that a detector is involved. In TLC and PC, detectors are not required for qualitative analysis, and consequently, these simple techniques are used primarily for qualitative screening. The opposite is true for the column methods, and one normally assumes that a chromatograph includes a detector. This section deals with the general aspects of detectors like those used in GC and LC column chromatographs. 

In most cases a three tier approach is adopted, as shown in Fig. II/4.2.3-1. Initially, a qualitative or semiquantitative approach is taken to assess the risk and screen it. When risks are in a high risk zone or there is the possibility of a major accident event, then quantitative risk assessments are carried out to prescribe necessary control measures. It is quite common that in many cases a combined approach is necessary to justify consequence analysis. Mostly, when a quantitative approach is undertaken, prior preliminary analysis is done. From the diagram it is seen that whenever all replies to the queries shown in the diagram after qualitative analysis are NO, then the action stops. If any reply is YES, then the next level of analysis is carried out. A similar approach is applicable for semiquantitative and quantitative analyses (Fig. II/4.2.3-1). 

Detailed evaluation events which cannot screened out based on qualitative and quantitative criteria are consequently included into... 

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