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Source inventory limits.

G D Kerr1, K F Eckerman

  • 1Health and Safety Research Division, Oak Ridge National Laboratory, TN 37831.

Health Physics
|December 1, 1990
PubMed
Summary
This summary is machine-generated.

New criteria for exempting radioactive sealed sources from inventory have been established. These values consider occupational dose and radioactive material activity to ensure safety and streamline regulatory processes.

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Area of Science:

  • Radiological Health
  • Nuclear Safety
  • Radiation Protection

Background:

  • Regulatory bodies require inventory management for radioactive materials to ensure safety and security.
  • Exempting certain low-risk radioactive sources simplifies compliance and reduces administrative burden.
  • Previous exemption criteria may not fully align with current dose limits and risk assessments.

Purpose of the Study:

  • To develop a new set of values for exempting sealed sources of radioactive materials from inventory.
  • To establish clear criteria based on occupational dose and source activity.
  • To ensure that exempted sources pose a minimal risk to radiation workers and the public.

Main Methods:

  • Defined exemption criteria based on external radiation dose at 1 meter from the source.

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  • Established exemption criteria based on the activity of the radioactive material.
  • Correlated these criteria with annual occupational dose limits and potential fatal cancer risk.

    • Main Results:

    • The proposed exemption criteria include an annual occupational dose of approximately 100 microSv (10 mrem) or less.
    • Source activity criteria are set at or below the annual limit on intake by inhalation, specifically less than 4 X 10(7) Bq (1000 microCi).
    • These values correspond to an estimated annual occupational dose of 50 to 500 microSv (5 to 50 mrem) and a low fatal cancer risk.

    Conclusions:

    • The developed criteria provide a scientifically sound basis for exempting specific sealed radioactive sources from inventory requirements.
    • These new values aim to balance regulatory efficiency with adequate radiation protection.
    • Implementation of these criteria can lead to streamlined inventory management for low-risk radioactive materials.