FEMA IS-303 Answers

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FEMA IS-303: Radiological Accident Assessment Concepts Answers

True or False: Tap water used for drinking is considered in the DIL calculations.True
What is the EPA intermediate-phase relocation PAG for the first year?2 rem TEDE
During a release, which of the field measurements described below indicates an appropriate location to take an air sample to be used for dose projections?Open-window readings that significantly exceed closed-window readings at 1 meter
Food samples analyzed after a release have been determined to have the following concentrations:Sr-90 150 Bq/kg
I-131 120 Bq/kg
Cs-134 + Cs-137 1150 Bq/kg
Is the food permitted to be released into commerce?No
A volunteer firefighter is functioning as an emergency worker for the county during a reactor accident. The firefighter’s full-time job is as a nuclear medicine technologist at a local hospital, and her annual occupational exposure-to-date is 2.5 rem. What additional dose may the firefighter receive as an emergency worker during the early phase?No additional dose
What dosage (mg) of KI is recommended for a 15 year old that weighs more than 70 kg?130 mg
At what projected CDE thyroid dose is potassium iodide recommended for an adult over the age of 40?500 rem
What is the purpose of a hot line?To separate contaminated and noncontaminated areas
All of the following are likely to happen to the fuel cladding 15–45 minutes after the core is uncovered EXCEPT:Direct Containment Heating (DCH)
True or False: Under special circumstances, state and local officials may permit the usage of food with concentrations exceeding the DILs.True
Given the following data, determine the airborne concentration of the contaminant in microCi/cm3:
Background count: 225 cpm
Gross count: 125,768 cpm
Sample time: 5 min
Flow rate: 2.35 cfm
Detector efficiency: 2.5%
Collector efficiency: 99.9%
6.8 x 10⁻⁶ microCi/cm³
In equations used to calculate concentration of radioactive material, mu (µ) represents which of the following?Wind speed at ground level
Ingestion of a radionuclide yielded a committed dose equivalent of 20 rem to the red bone marrow. Calculate the CEDE.2.4 rem CEDE
An adult (age 30) is projected to receive a CDE thyroid dose of 10 rem. What dosage of KI is recommended?130 mg
Which of the following is NOT one of the possible exposure pathways for radiation exposure from a nuclear incident?Desorption
Convert 12.6 mph to m/sec.5.63 m/sec
The first priority of protective actions is to:Prevent deterministic health effects
When doing field analysis using a pancake probe, the following media are acceptable for radioiodine sampling in the presence of noble gases EXCEPT:TEDE-impregnated charcoal
Which of the following is NOT a potential health effect of radiation?Pneumonia
What dosage (mg) of KI is recommended for children over 3 through 12 years old?65 mg
A package label specifies the activity of the contents as 0.074 TBq. What is the activity in millicuries?2 mCi
It is morning, with moderate incoming solar radiation. The wind speed is 7 m/sec. According to the EPA’s Workbook of Atmospheric Dispersion Estimates, what is the atmospheric stability class?Stability Class D
Potassium iodide is most effective as a thyroid blocking agent when it is administered within what time frame?1 to 2 hours prior to exposure
A utility worker lives in a slightly contaminated area outside the restricted zone surrounding an accident site. His projected first-year dose from living in this area is 250 mrem. This worker must enter the restricted zone to perform vital maintenance functions. What further annual dose may he accumulate?The occupational worker dose limit minus 250 mrem
Which of the following is NOT a type of containment failure?Cladding
The projected CDE to the thyroids of the public at a downwind location is 4 rem. Has the EPA early-phase PAG been exceeded?No
Convert 5.13 x 10⁻³ Sv/Bq to mrem/pCi.1.39 x 10⁻⁴ mrem/pCi
Which of the following is NOT an SI unit of measure?Curie (Ci)
Of the following indicators, which one confirms core damage?Radiation levels
What is the time period considered for contaminated food consumption in the DIL calculation?1 year, except for I-131 and Ru-103
According to NUREG-0654/FEMA REP-1, rev. 1, how often are phone numbers required to be updated in procedures for personnel notification?Quarterly
A dose of 5 rem has been calculated at 5 km from a release point. The atmospheric stability class is Class F. Using the Reduction Factor Table, determine how far someone would have to be from the release to receive 1 rem.3.5 km

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