FUN 1 EO: 1.40 - Radiation Protection Tech.

FUN 1 EO: 1.40

1 / 14

The ALI value varies based on which of the following?

Atmospheric pressure and temperature

Type of protective equipment worn

Duration of exposure to the radioactive source

Radiation hazard from each nuclide when ingested or inhaled

2 / 14

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

0.03

0.25

0.12

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)?

500

200

7.0E-8

4 / 14

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

Lung

Red bone marrow

Gonads

Thyroid

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

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

Not related to the thyroid dose at all

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

Equal to the whole body CEDE limit

7 / 14

What does Derived Air Concentration (DAC) mean?

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

The minimum concentration of a radionuclide required for detection

The maximum safe concentration of a radionuclide in air

8 / 14

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

Dependent on the region and law

Differing values depending on the chemical nature

Fixed value for all chemical compositions

A single average value

9 / 14

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

5 rem CEDE

50 rem CDE

10 rem CDE

2.5 rem CEDE

10 / 14

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

1.0 mrem

0.5 mrem

5.0 mrem

2.5 mrem

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

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

0.5 rem CEDE

10 rem CEDE

5 rem CEDE

1 rem CEDE

13 / 14

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 amount of a substance that can be dissolved in a liquid

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

The rate at which a substance can penetrate a surface

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 rate of exposure to radiation in the working environment

The total radiation emitted by a radioactive material in a year

The concentration of radioactive material allowed in drinking water

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