Qualitative safety features review

Qualitative Safety Features Review. It is a checklist structured following the principle of the defense-in-depth, and it includes a comprehensive set of qualitative recommendations. It provides designers with useful means to help ensure that safety truly is built-in, not added-on, from the early phases of the design of Gen-IV systems. 

Both qualitative and quantitative evaluation techniques may be used to consider the risk associated with a facility. The level and magnitude of these reviews should be commensurate with the risk that the facility represents. High value, critical facilities or employee vulnerability may warrant high review levels. While unmanned "off-the-shelf, low hazard facilities may suffice with only a checklist review. Specialized studies are performed when in-depth analysis is needed to determine the cost benefit of a safety feature or to fully demonstrate the intended safety feature has the capability to fully meet prescribed safety requirements. 

FAILURE MODE being addressed. Remember that the qualitative feature applies to the safety-related system for a SPECIFIC failure mode. Thus, a design review involving features pertaining only to spurious shutdown would not be relevant where failure to shutdown is the issue. Paragraph No. 

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