C11: Leak Test

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Questions and Answers

What is a sealed source?

Any radioactive material permanently sealed in inactive container or capsule (correct)

Radionuclide firmly incorporated in solid and effectively inactive material

Radioactive material bonded wholly within inactive material to prevent dispersion during routine use

Radioactive material covered by mylar, aluminum, steel, or plastic

Which form does the plated source take?

Coating of radioactive material on a disk or planchette (correct)

Mixture of radioactive compounds placed into a container and sealed closed

Metal capsule surrounding the radioactive material

Radioactive material bonded within inactive material

What is characteristic of the capsule form of sealed source?

Metal capsule surrounds the radioactive material (correct)

Radioactive material bonded wholly within inactive material to prevent dispersion during routine use

Radioactive material permanently sealed in an inactive container or capsule

Coating of radioactive material on a disk or planchette

Which is an example of a capsule form of sealed source?

Mixture of radioactive compounds placed into a container and welded or sealed closed Signup and view all the answers

What is the purpose of sealing the radioactive source in an inactive container or capsule?

To prevent dispersion of the radioactive substance during routine use Signup and view all the answers

What is the definition of a sealed source?

Radioactive material permanently sealed in an inactive container or capsule Signup and view all the answers

What is the purpose of the leak test mentioned in the text?

To ensure the integrity of the sealed source by detecting any leakage activity Signup and view all the answers

Which type of sealed sources are exempted from the leak test?

Sealed sources containing Tritium gas with activity less than 74 GBq Signup and view all the answers

What are the potential causes of leakage mentioned in the text?

All of the above Signup and view all the answers

Which method is used to conduct a non-radioactive leak test?

Vacuum bubble test Signup and view all the answers

Where should swabs/wipes be done to detect potential leaks or contamination?

At locations of potential leak or contamination, such as welded areas and window areas Signup and view all the answers

What is the recommended record-keeping duration for leak test results?

3 years Signup and view all the answers

What type of material is suitable for conducting a wet wipe (smear) test?

All of the above Signup and view all the answers

What is the threshold for confirming a leak during the wipe (smear) test?

$185 Bq @ 5 nCi$ Signup and view all the answers

Study Notes

Sealed Source Definition and Purpose

A sealed source is a radioactive material encased in an inactive container to prevent leakage of radiation.
It is designed to contain radioactivity safely and mitigate exposure to radiation hazards.

Forms of Sealed Sources

The plated source generally takes a thin layer of radioactive material applied to a substrate.
Capsule forms encase the radioactive material in a protective shell, ensuring safety and containment.

Characteristics of Capsule Form

The capsule form is characterized by robust materials to hold radioactive material securely.
This design protects against environmental factors and minimizes the risk of leakage.

Example of Capsule Form

An example of a capsule form sealed source is a cesium-137 source used in medical applications.

Purpose of Sealing

Sealing the radioactive source in an inactive capsule provides containment, prevents contamination, and enhances user safety.
It limits the risk of exposure to both the environment and individuals handling the source.

Leak Test Purpose

The leak test is conducted to check for any potential leakage of radioactive material from the sealed source.
This ensures that the sealed sources remain safe and do not pose a contamination risk.

Exempted Sources from Leak Test

Sealed sources with low levels of radioactivity, defined under specific safety regulations, are exempted from leak testing.

Potential Causes of Leakage

Leakage may arise from manufacturing defects, corrosion of the capsule, or physical damage to the sealed source.

Non-Radioactive Leak Test Method

A non-radioactive leak test typically employs a liquid scintillation counting method to detect contamination.

Swabs/Wipes Location for Leak Detection

Swabs or wipes are conducted on surfaces around the sealed source and on the source itself to identify potential leaks or contamination.

Record-Keeping Duration for Leak Test Results

The recommended duration for retaining leak test results is typically three years, ensuring compliance and safety tracking.

Suitable Material for Wet Wipe Test

Suitable materials for conducting a wet wipe (smear) test include soft tissue or cloth soaked in a solvent that can dissolve contaminants.

Threshold for Confirming Leak

A threshold for confirming a leak during the wipe test is generally set at detecting a specific amount of radioactive material, indicating significant contamination.

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Description

Test your knowledge about sealed source leak tests and safety measures with this quiz. Learn about the definition of sealed sources and the importance of preventing dispersion of radioactive substances.