2016 Risk Course Book

28

Steps to initiate radiation

 Sequence of steps to initiate irradiation includes a test of beam monitoring chambers, but …  … the information about missing power supply can not pass through faulty diode …  … interlock is not informed that monitoring chambers are missing  … and gives green light to the next step in the sequence towards irradiation

Signal is transferred through the diode

A

Signal of failure of the beam monitoring system

Interlock activated prevents irradiation

Diode fails (open circuit) signal not transferred

B

X

Signal of failure of the beam monitoring system

Interlock not activated: cannot prevent irradiation

Function of diode D 29

A: Diode working properly B: Diode disabled (open circuit)

2016-10-05

T Knöös