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Customised technical doors
Air / watertight 20 mCE- Cassiopée 20

Air / watertight 20 mCE- Cassiopée 20


To meet the Post-Fukushima requirements

Porte étanche 20 mCE - Cassiopée 20

Seismic load : up to 9 g

Blast protection : 2 bars

Watertight : 20 mCE

Industry and references

This type of door is intended to nuclear industry mainly to prevent natural disasters (tsunamis).

These doors are installed in Flamanville 3, Olkiluoto 3 and Taishan EPR NPP according to post-Fukushima requirements.

Technical information

• Rigid steel structure door with coating finish assembled by welding

• The frame is composed of different sizes angle brackets in painted steel, fitted withconnectors for sealing into concrete

• Opening by machined hinges
• 6 points central locking system
• Operation by wheel
• Watertight silicone seal
• Pressure rated (air and/or water) both sides


• Embedding of the frame in the 1st or 2nd phase of concreting by leaving a recess of 300 x300 mm min. at the rim

• Possibility to weld the frame on pre-sealed anchor plates or peg into concrete


• Anti-blast protection (up to 2 bar)


• Finishing: galvanization Z600/ 3 layers of decontaminable painting

• Access control system

• Door closer
• Position switch (open/ closed)

Our references

Do you want to create a door based on an existing configuration?

Don't hesitate to contact us: our representatives are at your disposal to help you choose the technical door that will perfectly meet your needs and safety performance requirements.