WEBVTT

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The First 100 Minutes

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The detonation of the radiological dispersal

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device may produce radioactive ballistic

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fragments that can give off radiation

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In this example, the dangerous radiations zone

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around the fragment is shown in dark purple.

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The hot zone is shown in light purple. The detination

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may also produce radioactive smoke.

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In an urban environment this smoke can be

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carried in several different directions

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and may be a respirable hazard for those

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in the area  within the first 15 minutes

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after the detenation. The smoke may also

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contaminate surfaces downwind possible

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causing elevated radiation levels.

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This simulation tracks the responders

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exposure from all of the radio-active

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fragments and smoke contamination.

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The exposure rate at the responders location

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is shown by the top number and represents

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what would be seen on a

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handheld instrument. This guidance

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uses the following hazard zone definitions.

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The Hot Zone is any exposure rate

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greater than .01 R hour
or 10 milli-R per hour.

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This zone can be safely operated

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in by responders for lifesaving

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and property protection activities provided

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that unnecessary activities and

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time spent in this zone is minimized.

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Nameing conventions for this zone

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vary, consult your local doctoring.

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The dangerous radiation zone is

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defined that any area greater than 10 R per hour

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activities in this zone should be restricted to

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such as immediate lifesaving and should be

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performed as rapidly as possible.

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The Total Dose Received by Responder

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is shown by the bottom numer. In the United States,

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Occupational workers tipically have
annual dual dose guidance of

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5 rem per year. There are no dose limits

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for emergency response at  activities,

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provided that are reasonable dose reduction actions

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have been taken a 10 rem dose is

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justified for property protection and a

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25 rem does is justified for lifesaving activities.

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Again, these are not limits and
higher dosages can be justified

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for the protection of large

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populations when the responder

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is fully aware of the risk involved.