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Response to Abnormal Situations - std109899cn10071
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Controls for Hot Particles - Continued


DOE-STD-1098-99
Radiological Control
Conduct of Radiological Work
June 2004
For radioactive spills involving highly toxic chemicals, workers should immediately exit the area without attempting
to stop or secure the spill. They should then promptly notify the Industrial Hygiene or Hazardous MaterialTeam
and radiological control personnel.
347 Controls for Benchtop Work, Laboratory Fume Hoods, Sample Stations, Glovebags, and Gloveboxes
The following provisions are applicable to radiological work that has the potential to generate radioactive contamination
in localized benchtop areas, laboratory fume hoods, sample stations, glovebags, and glovebox operations located in areas
that are otherwise contamination free.
1.
Provisions for radiological work permits are provided in Article 322.
2.
Protective clothing should, at a minimum, include labcoats and gloves. Gloves should be secured at the wrist as
necessary.
3.
Shoecovers should be considered based on the potential for floor contamination.
4.
Workers should periodically monitor their hands during work.
5.
Upon completion of work or prior to leaving the area, workers shall monitor those areas of their body that are
potentially contaminated [see 835.1102(d)]. At a minimum, this includes hands, arms, and front portions of the body.
A whole b ody frisk is recommended.
6.
If there is a potential for splashing or airborne radioactivity, such as when taking pressurized samples, additional
controls such as rubber aprons, face shields, full PCs, or respiratory protection should be instituted.
7.
Gloveboxes should be inspected for integrity and operability prior to use.
8.
Gloveboxes should be marked with, or survey measurements should be posted to identify, whole body and extremity
dose rates.
348 Controls for Hot Particles
Hot particles are small, discrete, highly radioactive particles capable of causing extremely high doses to a localized area in
a short period of time. Hot particle contamination may be present or be generated when contaminated systems are
opened or when operations such as machining, cutting, or grinding are performed on highly radioactive materials.
1.
The site-specific radiological control manual should define hot particles, such as those capable of producing a
shallow dose equivalent greater than 100 millirem in one hour, specific to facility operations and source terms.
2.
Measures for controlling hot particles, as identified in items 3 through 7 of this Article, should be implemented
under the following conditions:
a.
Upon identification of hot particles
b.
During new or non-routine operations with a high potential for hot particles, based on previous history
c.
Upon direction of the radiological control organization.
3.
Survey provisions for areas or operations with the potential for hot particle contamination are established in Article
554.9.
3-19


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