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Aims :

• To revise some aspects of radiation instruments.
• To provide an understanding of some of the radiation instruments approved for measuring dose rates at nuclear power stations.

Objectives :
By the end of this course the student will be able to:

• Use the graph of the 'Number of Ions Per Incident Particle against Voltage' to explain how the following gas detectors function:- ionisation chamber, proportional counter, boron trifluoride proportional counter, geiger-müller counter.
• Identify the following instruments:- portable dose ratemeter type PDR1 and PDR2, ion chamber model RO-2W, RO-2A and RO-10, teletector model 6112B and neutron monitor type NM2.
• Explain, with reference to the four detectors in item 1, what detectors are used in the above instruments.
• Explain what radiations are measured and detected by the above instruments.
• Explain how to monitor for radiation by making reference to selecting an instrument, instrument range, energy dependence, monitoring speed, beta and gamma monitoring, detector position, instrument fallback, type defects, philosophy of radiation monitoring, systematic monitoring and results.

Course Modules:

Principles of Gas Filled Detectors Detection Instruments How to Use Detectors Assessment