FUN 1 EO: 1.40 - Radiation Protection Tech.

FUN 1 EO: 1.40

1 / 14

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

The concentration of radioactive material allowed in drinking water

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 rate of exposure to radiation in the working environment

2 / 14

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

Equal to the whole body CEDE limit

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

Not related to the thyroid dose at all

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

3 / 14

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

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

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

The rate at which a substance can penetrate a surface

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

4 / 14

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

5 rem CEDE

10 rem CDE

2.5 rem CEDE

50 rem CDE

5 / 14

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

1 rem CEDE

0.5 rem CEDE

10 rem CEDE

5 rem CEDE

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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

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

The minimum concentration of a radionuclide required for detection

7 / 14

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

0.03

0.12

0.25

8 / 14

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

0.5 mrem

5.0 mrem

1.0 mrem

2.5 mrem

9 / 14

The ALI value varies based on which of the following?

Duration of exposure to the radioactive source

Radiation hazard from each nuclide when ingested or inhaled

Atmospheric pressure and temperature

Type of protective equipment worn

10 / 14

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

11 / 14

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

Thyroid

Red bone marrow

Gonads

Lung

12 / 14

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

Dependent on the region and law

Fixed value for all chemical compositions

A single average value

Differing values depending on the chemical nature

13 / 14

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

14 / 14

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)?

200

500

7.0E-8

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