Protecting Workers from Ultraviolet Radiation - icnirp

Protecting Workers from Ultraviolet Radiation
• Have a simple readout process that allows easy conversion to the desired measure of
UVR exposure dose.
• Have a low cost per dosimeter to permit large-scale monitoring.
8.4 Procedure of Detailed Indoor Exposure Assessment
For each exposure assessment, a detailed plan should be prepared and should consider the
following:
• The target of the assessment and the basis of the assessment, e.g. the exposure limit
values to be applied
• Collect available manufacturer’s data on the source, filters and on possible changes made
by the user (e.g. replacement lamps)
• The initial work task analysis and worst case exposure assessment
• Determine whether site measurements are necessary and what limits upon uncertainty is
required
• The equipment used and the measurement procedures, or data source if calculations are
used
• Make photographs or videos of the workplace and, if a more detailed work task analysis
is required, the exposure situations and the measurement points
• Number of times to repeat any measurements and the exposure assessment
• All other necessary details concerning the workplace, the exposed people, the
measurement operator, the date and place of the measurement, etc..
8.4.1 Work task analysis
Before initiating calculations of exposures or measurements, one should carry out a detailed
work task analysis, i.e. a careful examination of all working steps of the person whose exposure
is to be determined. Inquire if acute effects such as erythema, photokeratoconjunctivitis have
occurred. If there are no acute effects reported, this should not be misinterpreted to preclude a
potential hazard of exceeding the exposure limits. However, the occurrence of acute effects
might indicate special circumstances of increased risk which might not exist during routine
operations. An initial worst-case assessment (in terms of exposure duration and distance) may
show that further measurements and/or calculations are not required.
For a detailed analysis, all points (distance and position relative to the source) at which the
person remains during the work and the potential body sites of exposure are noted. Then, the
duration of exposure at each location is determined. Record the application or non-application of
protective measures, such as the use of personal protective equipment. Finally, determine the
total exposure duration within a day and even during a year. Assess whether the working
conditions are stable or may change in the future and thereby affect the total exposure
assessment.
48