• Class 1E LOCA
  • RCC-E K1 qualified
  • Quick connect hexagonal nut screw coupling
  • With robust flexible metal conduit
  • Compliant with EPR
  • High shielding performances
  • Optimized wiring and easy maintenance (8NA junction boxes)
  • Multi inputs & outputs (8NA junction boxes)
  • Factory cabled (8NA6G cabled field plug)

Key features and benefits


The 8NA series is dedicated range of connectors complying with LOCA safety requirements. With approved component materials, our connectors meet the highest radiation levels and harshest nuclear environment. SOURIAU’s range complies with the main nuclear industry standards (RCC-E and IEEE).

The 8NA connectors are supplied by SOURIAU worldwide in nuclear power plants and have been for more than 40 years.

Technical Data

  • Coupling nut tightening torque: 5 daN.m
  •  Endurance: 50 mating / unmating
  • Temperature range:  -40 to +85°C (-40 to 185°F)
  • Temperature peak: +160°C (320°F)
  • Radiation: 85 MRads “gamma” at 70°C (158°F)
  • Seismic tests:
    • OBE (Operating Basis Earthquake): 2g ZPA
    • SSE (Safe Shutdown Earthquake): 4g ZPA
  • Loss of Coolant Accident (LOCA):
    • Temperature envelope: 156°C (313°F) max.
    • Pressure envelope: 5,6 bars (81 psig) max.
  • Post accidental conditions:
    • 100°C (212°F) during 240 hrs

Examples of application field

8NA connectors are used in many LOCA qualified applications: from instrumentation to valves actuation and Primary equipment in Nuclear Power Plants.