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Related Experiment Videos

Six methods to assess potential radioactive air emissions from a stack

J M Barnett1, W E Davis

  • 1Westinghouse Hanford Company, Richland, WA 99352, USA.

Health Physics
|November 1, 1996
PubMed
Summary

U.S. Department of Energy hazardous air pollutant (HAP) emissions from 125 Hanford Site stacks were assessed. 106 stacks are compliant, with 19 requiring further action under a Federal Facilities Compliance Agreement.

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Area of Science:

  • Environmental Science
  • Nuclear Engineering
  • Regulatory Compliance

Background:

  • U.S. Department of Energy (DOE) facilities must monitor hazardous air pollutant (HAP) emissions.
  • Title 40, Code of Federal Regulations (CFR), Part 61, Subpart H mandates continuous monitoring for stacks with potential exposure >= 1 muSv y-1 to offsite individuals.

Purpose of the Study:

  • To assess radionuclide emissions from 125 Westinghouse Hanford Company stacks.
  • To ensure compliance with National Emission Standards for Hazardous Air Pollutants (NESHAP).
  • To estimate potential dose to the maximally exposed individual.

Main Methods:

  • Six U.S. Environmental Protection Agency (EPA)-approved methods were used to assess potential unabated radionuclide emissions.
  • The CAP88 code was employed to estimate dose to the maximally exposed individual.

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  • Stack emissions were evaluated against EPA thresholds.

    • Main Results:

    • 106 out of 125 stacks were found to be in compliance, below the EPA emission threshold.
    • 19 stacks require further action to achieve full compliance.
    • A Federal Facilities Compliance Agreement was established in February 1994 for non-compliant stacks.

    Conclusions:

    • The assessment ensures protection for workers, the public, and the environment.
    • Implementing best available technology can yield significant cost benefits.
    • The CAP88 code and emission estimation methods are presented alongside results.