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After completion of casting operations at … After completion of casting operations at the #1 Slab Caster, a trained worker proceeded to the mold strand area to remove the Berthold Co-60 rod source from the mold and place it in proper storage. The source is 3.97 mCi (Co-60) and is used to measure mold level of liquid steel. After all machinery and equipment was moved away from the mold so it could be accessed, the trained worker removed the plug to access the source for proper removal. Upon removing the plug, the trained worker noticed dirt and debris in the opening so he used compressed air to clean the area. The force of the compressed air into the source opening caused the source rod to lift out of the seated position and drop approximately 10 feet into the mold. The trained worker and a co-worker were able to retrieve the rod and place it back into its appropriate source holder. Investigation and exposure calculations indicated that neither employee was exposed above regulatory limits.</br>The licensee performed exposure calculations and estimated the trained radiation worker received a dose to the hands of 10.2 mRem. The assistant (not a trained radiation worker and not carrying dosimetry) received a calculated dose to the hands of 0.12 mRem.calculated dose to the hands of 0.12 mRem. +
06:30:00, 22 July 2010 +
46,154 +
15:13:00, 5 August 2010 +
06:30:00, 22 July 2010 +
After completion of casting operations at … After completion of casting operations at the #1 Slab Caster, a trained worker proceeded to the mold strand area to remove the Berthold Co-60 rod source from the mold and place it in proper storage. The source is 3.97 mCi (Co-60) and is used to measure mold level of liquid steel. After all machinery and equipment was moved away from the mold so it could be accessed, the trained worker removed the plug to access the source for proper removal. Upon removing the plug, the trained worker noticed dirt and debris in the opening so he used compressed air to clean the area. The force of the compressed air into the source opening caused the source rod to lift out of the seated position and drop approximately 10 feet into the mold. The trained worker and a co-worker were able to retrieve the rod and place it back into its appropriate source holder. Investigation and exposure calculations indicated that neither employee was exposed above regulatory limits.</br>The licensee performed exposure calculations and estimated the trained radiation worker received a dose to the hands of 10.2 mRem. The assistant (not a trained radiation worker and not carrying dosimetry) received a calculated dose to the hands of 0.12 mRem.calculated dose to the hands of 0.12 mRem. +
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00:00:00, 5 August 2010 +
13-32670-01 +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
02:09:03, 2 March 2018 +
15:13:00, 5 August 2010 +
14.363 d (344.72 hours, 2.052 weeks, 0.472 months) +
06:30:00, 22 July 2010 +
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