Structural waterproofing is best designed in two chronologically separate phases [96]:

— inspection and permitting design phase

— execution design phase.

8.3.4.1 Inspection and permitting design phase

Inspection and permitting design is part of the construction and Atomic Energy Act approval procedure. Designs must generally pass inspection before they can be approved.

Inspection and permitting application documents should contain, as a minimum requirement:

— details of the structural waterproof

— layout plan

— overview drawings

— standardised design details

— list of annexes.

The structural waterproofing design should include:

— a list of the structures with structural waterproofing

— foundation depths

— details of ground surface level, power plant zero level, design water levels and flood water levels, design water levels, high water levels (permanent high water level to KTA rule 2207 [23])

— details of waterproofing strategy

— details of waterproofing method

— service and special loads

— design rules for service loads

— making penetrations

— verification of suitability.

8.3.4.2 Execution design phase

As the structural waterproofing execution design and the static load calculations and formwork drawings are dependent on one another, the execution design is carried out at more or less the same time. The structural waterproof must be designed to meet the detail of the stresses acting on it. Any verifications of suitability not to hand must be provided. All the data required for execution must be recorded in overview and detail drawings.

Ground plans, sections, views and even developments, if required should include as a minimum:

— axes, main dimensions, heights

— details of the number and type of layers (designed to meet compression stresses and the flow path of the bitumen adhesive to [92])

— general details, such as the sub-concrete and protective layers

— details of corrosion-protecting steel components

— references to detail drawings and standard details to be used

— references to connecting drawings

— details of settlement differences and other movement processes at structural joints.