In normal nuclear operation, the solution must be resistant to:
- Thermal ageing at high environmental temperature for at least 60 years,
- Nuclear (gamma and beta) radiation.
In case of nuclear incident, the solution must be resistant to:
- Nuclear radiation up to 1MGy,
- High pressure up to 6 bars during 15 minutes,
- Hot temperatures > 170°C during 15 days,
- 100 % hygrometry over 15 days,
- Chemical agents splashes such as boric acid,
- Oil aggressiveness,
- Electrical fault,
- Fire propagation.
A hostile environment in normal nuclear operation and in the event of an incident
As a result, during normal nuclear operation, the solution must be resistant to the hostile elements that make up this environment, such as thermal ageing at high ambient temperatures and nuclear radiation. The fiber optic solution must also be able to withstand a nuclear incident so that it can continue to perform its main function: protecting nearby personnel.
The importance of a stable water level
The water level in nuclear reactor pools must remain stable because it absorbs the radiation emitted by the fuel. This water level must be measured during refuelling so that any variations can be detected in real-time. It is also used to protect nearby personnel from radioactive elements.
The nucleated optical probes offered by SEDI-ATI Fibres Optiques have been designed based on assemblies of optical fibers and special cords. They form part of an optical sensor solution for measuring water levels in reactor pools.
The high-precision assembly is a passive solution at the end (no piezoelectric material). Thanks to its hermeticity, the sensor is resistant to radiation and immune to electromagnetic effects.
Fiber-optic bundles are perfectly adapted to perform diffuse reflectance spectroscopic measurements.
We offer bifurcated fiber-optic reflection probe bundles with a threaded tip for high-temperatures up to +400 °C.
The KTRAV-M10 reconfigurable hermetic fiber-optic feedthroughs are suitable for vacuum and pressure applications up to 600 bars. They ensure a high level of hermeticity better than 10-10 mbar.l/s.
The KTRAV-M12 hermetic fiber-optic feedthroughs are suitable for vacuum and pressure applications up to 1000 bars. They ensure a high level of hermeticity better than 10-9 mbar.l/s.
Optical fibers gather numerous advantages encouraging to integrate them in applications with radiative environments, associated with the civil, space or military fields.
We offer bifurcated fiber-optic reflection probe bundles with a barrel tip for high-temperatures up to +400 °C.
The KTRAV-IP series is a hermetic adapter for pressure applications up to 30 bars.