The following information was received from State of
New Jersey via email:
The licensee reported on 11/24/20 that during a 6-month shutter check, one Cs-137 (50 mCi) fixed gauge shutter was found to be not closing completely. The gauge manufacturer was contacted and came on site to fix the shutter. Leak tests were taken before and after and found to be under 0.005 æCi. More information will be provided by the licensee.
Sources that are "Less than
IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as
moisture density gauges or thickness
gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to
http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf