4.13 Analysis of Final Design Phase
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4.13 Analysis of Final Design Phase

  4.13.1 The tasks to be performed in this phase are similar to the analysis of the Preliminary design. In a first sub-phase, a review of the analysis of the preliminary design is performed to determine the difference between Preliminary design and Final design in order to specify the scope of the analyses that have to be considered in this phase. Thus, this analysis phase may contain an update of the HazId, a quantitative risk analysis and risk evaluation.

  4.13.2 The requirements related to the risk assessment of the final design will be based on the novelty of the design, the risk assessment plans defined for the previous phase and the differences between the preliminary and the final design. Typically, the risk assessment will address the following:

  • .1 identified hazards associated with the alternative and/or equivalency (update of preliminary analysis);

  • .2 identified potential safeguards already considered in the design;

  • .3 identification of frequencies and consequences associated with the hazards, and the resulting risks;

  • .4 a precise risk model in order to perform quantitative analyses;

  • .5 description of data references, assumptions, uncertainties and sensitivities;

  • .6 comparison of risk levels with evaluation criteria;

  • .7 identification of potential risk reducing measures;

  • .8 cost-benefit assessments in order to select the most appropriate risk reducing measures;

  • .9 description of selected risk reducing measures;

  • .10 re-evaluation of risk taking into account the additional risk reducing measures and comparison with evaluation criteria;

  • .11 identification of issues that may require further analyses and testing; and

  • .12 identification of issues that may require special attention with respect to operations, accessibility and inspections.

  4.13.3 The work performed related to risk assessments should be documented and submitted in a timely manner to the Administration in order for them to stay informed of the processes and to provide feedback, if necessary. The results of the risk assessments shall be the basis for consideration of final approval, if required.

Parent topic: 4 Process
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