FUN 1 EO: 1.40 - Radiation Protection Tech.

FUN 1 EO: 1.40

1 / 14

What does Derived Air Concentration (DAC) mean?

Concentration of a radionuclide in water over a given time period

The maximum safe concentration of a radionuclide in air

The minimum concentration of a radionuclide required for detection

Concentration of a radionuclide in air resulting in an intake of one ALI in a 2,000-hour working year

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If the weighting factor for the thyroid is low, how is the limiting ALI for radioactive iodine related?

50 rem thyroid dose (CDE) rather than 5 rem CEDE limit

5 rem thyroid dose (CDE) rather than 50 rem CEDE limit

Equal to the whole body CEDE limit

Not related to the thyroid dose at all

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What does the Annual limit on intake (ALI) mean in the context of radiation protection?

The rate of exposure to radiation in the working environment

The total radiation emitted by a radioactive material in a year

The derived limit for the amount of radioactive material taken into the body of an adult worker in a year

The concentration of radioactive material allowed in drinking water

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What is the relationship between CEDE and CDE as per the given formula?

CEDE = CDE * Wt

CEDE = CDE / Wt

CEDE - CDE = Wt

CEDE + CDE = Wt

5 / 14

The ALI value varies based on which of the following?

Radiation hazard from each nuclide when ingested or inhaled

Duration of exposure to the radioactive source

Type of protective equipment worn

Atmospheric pressure and temperature

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If the intake of a radioactive material is 0.2 times an ALI, what would be the committed effective dose equivalent (CEDE)?

5 rem CEDE

10 rem CEDE

0.5 rem CEDE

1 rem CEDE

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What does solubility class in the context of radiation protection refer to?

The degree to which a substance can be absorbed by a particular organ

The rate of removal of radionuclides ingested or inhaled based on chemical composition

The amount of a substance that can be dissolved in a liquid

The rate at which a substance can penetrate a surface

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Which organ has the highest weighting factor according to the given table in 10CFR20?

Red bone marrow

Thyroid

Lung

Gonads

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How is ALI provided for Cobalt-60 in 10CFR20?

Dependent on the region and law

Differing values depending on the chemical nature

A single average value

Fixed value for all chemical compositions

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If 2000 DAC-hours equal 5 rem, what is the dose rate equivalent of one DAC?

0.5 mrem

2.5 mrem

1.0 mrem

5.0 mrem

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In the provided table for Cobalt-60, what is the oral ingestion ALI (µCi) for the class marked with "W" (weeks) (Table on page 111 of Study Guide)?

7.0E-8

200

500

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What is the inhalation ALI (µCi) for Iodine-131 for the Thyroid as per the given table? (Table on page 109 of Study Guide)

200

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Which value represents the dose to the whole body annual dose limit?

10 rem CDE

5 rem CEDE

50 rem CDE

2.5 rem CEDE

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What is the weighting factor for the Lung as defined in 10CFR20?

0.03

0.12

0.25

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