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Preliminary Survey
1.
Ensure that the survey meter is calibrated and operational.
1.
Conduct a radiation survey of the mounted unit by surveying the source
holder and detector, omni-directionally, one foot from the surface.
1.
If the radiation field is normal, less than 50 mSv/hr (5 mrem/hr) at 30 cm
(12") for most VEGA Americas source holders, proceed with the leak test.
1.
If the radiation field is greater than 50 mSv/hr (5 mrem/hr) at 30 cm (12"),
complete the following: Post restrictions of the area, if required.
Post restrictions of the area, if required
•
Verify with the manufacturer that this condition is normal for the type of
•
source and source holder you are installing.
Perform a Leak Test
1.
Remove the zip-top bag containing the swab stick.
2.
Write the source serial number or other identification on the bag.
3.
Open the zip-top bag and grasp the swab stick by the end opposite of the
fiber tip.
4.
Wipe the external surface of the source holder by using the fiber-tipped end
of the swab stick. Wipe the locations where contamination would most likely
accumulate in the event the source capsule was leaking.
5.
Place the swab stick into the zip-top plastic bag and close.
6.
Put the zip-top bag in an envelope and seal it.
Do not touch the fiber tipped end or allow the tip to touch other
objects since this could spread contamination if the source is
!
leaking. If the swab stick contains a significant amount of
CAUTION
radioactive material, send an emergency notification, by telephone
immediately. Contact the appropriate nuclear regulatory agency
and VEGA Americas for assistance. You must make arrangements
with VEGA Americas, or another specifically licensed person to take
the source out of service.
39089-US-210509
Operation
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