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Aims :

• To provide an understanding of some of the contamination instruments approved for measuring surface contamination at nuclear power stations.
• To consider how these instruments are used for monitoring surface contamination.

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

• Explain the requirements of NRSI 16 and Rule A5.2.
• Define 'efficiency' and explain the main parameters that affect the efficiency of a probe/ratemeter.
• Explain the relationships between Bq.cm-2 and count per second (cps).
• Identify the following instruments and briefly explain how they work: a)Beta probes type BP4/4A, BP4/4B, BP4/4C, b)Dual purpose probes type DP2/4. DP2R/4., c)Ratemeter type RM6), d)Portable Contamination Monitor type PCM5/1,
• Explain what radiations are measured and detected by the above instruments.
• Explain how to use the above instruments.
• Define meter response time and saturation.
• Explain how to monitor a surface for fixed and/or loose alpha or beta contamination.
• State the area of surfaces that should be swabbed, the assumed collection efficiency and the documents that provide these figures.

Course Modules:

Requirements of Health Physics Instruments Principles of Contamination Detectors Contamination Instruments Monitoring Procedures Assessment