Selection of appropriate design standards

According to the experience in different States, very often different standards for design, material selection and construction quahty are applied in the same project for the different disciphnes (mechanical, dvU and electrical). An early assessment of the consistenq of the respective safety margins and relevant uncertainty levels and of their agreement with the general safety requirements for the project should be carried out in the different design tasks. 

Such an assessment may in fact affect the management of the project and the entire quality system required for the design assessment and the construction phase, by ensuring that the design assumptions in terms of global plant safety are realized in the design. 

In particular, in the selection of appropriate design standards, the compatibility and suitability of the following options should be evaluated  

The overall safety margins provided by the design should then be evaluated in the safety assessment phase, in accordance with the procedures recommended in Ref. [9]. 

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