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FEMA IS-303: Radiological Accident Assessment Concepts Answers
| Question | 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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