Unit VIII

1.      Selenium-75 is used in medicine to assist in diagnosing pancreatic cancer and decays solely by electron capture. The product of its decay is __________.

2.      The DOT regulation at 49 C.F.R. §172.403 requires shippers to affix RADIOACTIVE YELLOW-III labels to a package having a transport index greater than 10 when the maximum radiation level at any point on the surface is greater than 2 mSv/h but less than or equal to 10 mSv/h. Are shippers required to affix RADIOACTIVE YELLOW-III labels to a package having a transport index greater than 10 if the maximum radiation level on its surface is measured to be 13 mrem/min? Yes, or No? 1) __________. What is 13 mrem/min in mSv/hr? 2) __________

3.      The best means of personal protection from radiation for emergency responders is the implementation of three basic principles: time, distance, and shielding. Using the Inverse Square Law of radiation, what Geiger counter reading would you get for a radioactive material when you are four feet from the source (assume an initial reading of 6300 R at a distance of 1 foot from the source)? __________ R.