In the illustrated embodiment, a plurality of fiber sensing cables 42 are disposed along {HEAD ~ the rotor shaft} 50 of {TAIL ~ the steam turbine} 22 
In the illustrated embodiment , a plurality of fiber sensing cables 42 are disposed along { HEAD ~ the rotor shaft } 50 of { TAIL ~ the steam turbine } 22
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH