Long-term radiation effects on fibre Bragg grating temperature sensors in a low flux nuclear reactor

Long-term temperature monitoring in a low flux nuclear reactor using fiber Bragg grating sensors

Multiplexed FBG temperature sensors are used to measure a temperature profile inside an irradiation channel of a low flux nuclear reactor. After 40 months, we show that the sensors still operate satisfactorily. The measured drift is lower than 3 ◦C.

Temperature monitoring of nuclear reactor cores with multiplexed fiber Bragg grating sensors

Alain Delchambre Université libre de Bruxelles CP 165/41, 50 av. F.D. Roosevelt B-1050 Brussel, Belgium Abstract. In-core temperature measurement is a critical issue for the safe operation of nuclear reactors. Classical thermocouples require shielded connections and are known to drift under high neutron fluence. As an alternative, we propose to take advantage of the multiplexing capabilities of...

Radiation-resistant WDM Optical Link for Thermonuclear Fusion Reactor Instrumentation

The future International Thermonuclear Experimental Reactor (ITER) is a complex installation that will require permanent monitoring and frequent maintenance operations. The high-gamma dose rates, the high neutron fluence and other radiological hazards call for the use of remotehandled equipment. The management of heavy umbilicals connecting the control systems with the remote tools is therefore...

Temperature monitoring with fibre Bragg grating sensors for MGy dose level gamma-radiation environments

A suite of optical fibre sensors for structural condition monitoring

This paper is to review the research activities at City University London in the development of a range of fibre Bragg grating (FBG)-based sensors, including strain, temperature, relative humidity, vibration and acoustic sensors, with an aim to meet the increasing demands from industry for structural condition monitoring. As a result, arrays of optical fibre sensors have been instrumented into ...