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  • I'm Eric Armstrong and I'm the

  • Radiation safety program manager

  • I also serve as the University's

  • Radiaiton safety officer and laser safety officer

  • The largest program area within radiation safety

  • Is radioactive materials

  • This includes 50 principle investigators

  • 285 research staff and 233 locations

  • On the Iowa State University campus

  • Contamination monitoring is required

  • To maintain our license conditions

  • But makes good sense as a way to manage

  • Radiaiton exposure

  • Radiation workers are exposed to

  • Radiaiton and this can add to their

  • Lifetime cancer risk

  • By reducing radiation exposure through monitoring

  • We can imrpove the health of workers

  • Who rely on radioactive materials to complete their work

  • The radiation hazard of radioactive materials

  • Has the potential to impact areas beyond the lab

  • Material can migrate from containment

  • And once uncontained this material has the potential

  • To move outside the lab to public areas

  • To cars, and buses, even homes where it can expose the public

  • It should be the goal of all staff

  • Using radioactive material to ensure that radiation

  • Exposure is kept as low as possible

  • To themselves and the general public

  • One of the most important services the

  • Radiation safety group provides is

  • Radiation contamination and exposure monitoring

  • Monitoring is completed to evaluate and minimize

  • Risk from the use of radioactive material

  • Upon arriving to the lab

  • Monitoring is completed in two phases

  • The first phase involves a meter survey

  • To assess areas greater that background levels

  • And to assess and radiation exposure hazards

  • Meter selection is determined by the types of

  • Materials that are contained in the lab

  • And may require more than one type of meter

  • To go ahead and take the survey

  • The second monitoring phase includes

  • Collecting a series of smears to

  • Monitor for removable contamination

  • And to check for materials that can not

  • Be detected with portable instruments

  • Smear samples are collected from work areas

  • Equipment, enterences, and areas with

  • Potential loose material such as door handles

  • Faucets, and refridgerators

  • Once the lab survey is completed the smears are

  • Returned to EH&S for further analysis

  • Using proportional and liquid simulation counters

  • Through smear sampling the radioactivity of an area

  • Can be derived and analyzed for decontamination

  • Contamination monitoring improves the labs ability

  • To keep exposures as low as possible

  • While the workers reap the greatest benefits

  • From good monitoring practices, we are also

  • Protecting the public from the invisible hazard

I'm Eric Armstrong and I'm the


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B1 中級

環境衛生と安全 - 放射線モニタリング (Environmental Health and Safety - Radiation Monitoring)

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    郭玉梅 に公開 2021 年 01 月 14 日