FUN 1 EO: 1.40 - Radiation Protection Tech.

FUN 1 EO: 1.40

1 / 14

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

Thyroid

Red bone marrow

Gonads

Lung

2 / 14

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

The rate at which a substance can penetrate a surface

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 of removal of radionuclides ingested or inhaled based on chemical composition

3 / 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

7.0E-8

500

4 / 14

What does Derived Air Concentration (DAC) mean?

The minimum concentration of a radionuclide required for detection

The maximum safe concentration of a radionuclide in air

Concentration of a radionuclide in water over a given time period

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

5 / 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

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

The total radiation emitted by a radioactive material in a year

The rate of exposure to radiation in the working environment

7 / 14

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

5.0 mrem

2.5 mrem

0.5 mrem

1.0 mrem

8 / 14

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

5 rem CEDE

2.5 rem CEDE

10 rem CDE

50 rem CDE

9 / 14

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

1 rem CEDE

0.5 rem CEDE

10 rem CEDE

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

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

Not related to the thyroid dose at all

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

Equal to the whole body CEDE limit

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

12 / 14

The ALI value varies based on which of the following?

Atmospheric pressure and temperature

Duration of exposure to the radioactive source

Radiation hazard from each nuclide when ingested or inhaled

Type of protective equipment worn

13 / 14

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

Differing values depending on the chemical nature

A single average value

Fixed value for all chemical compositions

Dependent on the region and law

14 / 14

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

0.12

0.25

0.03

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