FUN 1 EO: 1.40 - Radiation Protection Tech.

FUN 1 EO: 1.40

1 / 14

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

0.25

0.03

0.12

2 / 14

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

Gonads

Red bone marrow

Thyroid

Lung

3 / 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

4 / 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

5 / 14

What does Derived Air Concentration (DAC) mean?

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

The maximum safe concentration of a radionuclide in air

The minimum concentration of a radionuclide required for detection

Concentration of a radionuclide in water over a given time period

6 / 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 rate at which a substance can penetrate a surface

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

7 / 14

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

Not related to the thyroid dose at all

Equal to the whole body CEDE limit

8 / 14

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

1.0 mrem

5.0 mrem

2.5 mrem

0.5 mrem

9 / 14

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

Dependent on the region and law

Fixed value for all chemical compositions

Differing values depending on the chemical nature

A single average value

10 / 14

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

10 rem CEDE

1 rem CEDE

5 rem CEDE

0.5 rem CEDE

11 / 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

12 / 14

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

5 rem CEDE

10 rem CDE

50 rem CDE

2.5 rem CEDE

13 / 14

The ALI value varies based on which of the following?

Duration of exposure to the radioactive source

Type of protective equipment worn

Atmospheric pressure and temperature

Radiation hazard from each nuclide when ingested or inhaled

14 / 14

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

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

The rate of exposure to radiation in the working environment

The total radiation emitted by a radioactive material in a year

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