Browse wiki
Jump to navigation
Jump to search
A contamination survey was being performed … A contamination survey was being performed to relocate 16 cabinets in Room 25 of Magill Hall to change the use of the approximately 500 square foot storage room. These 16 cabinets had not been moved since the basement of Magill Hall went through a decontamination remediation related to an Americium 241 spill in 2000 (See EN# 37282 and EN# 37298). The contamination survey was conducted due to a license condition relating to the removal of equipment from the facility due to the spill in the year 2000. After the cabinets were moved, fixed Am-241 contamination was found . The contamination testing was limited to 20-25 spots of 100 square centimeters on the floor of Room 25, except for one spot on one cabinet. It is estimated that approximately 30% of the room floor has potential contamination. The highest spot had 80,000 dpm fixed contamination of Am-241 (release limit of 100 dpm). Many other spots ran in the 15,000-35,000 dpm range. The average spot was calculated at 5000 dpm of fixed contamination of Am-241. Air monitoring of the room shows only background levels. Individual counting of the air samples is in progress. There is no indication of airborne contamination at this time.</br>The room is now controlled by a high security lock which can only be opened by the licensee RSO. The room has been posted as a Radioactive Materials Contaminated Area. A very high percentage of the contamination is fixed. One round of decontamination using wet paper towels has reduced the contamination considerably but was not eliminated. The licensee estimates that it will perform up to 3 additional decontamination rounds using gentle techniques (wet paper towels) one week apart to allow the floor to dry between rounds. to allow the floor to dry between rounds. +
15:00:00, 15 February 2006 +
42,345 +
17:00:00, 16 February 2006 +
15:00:00, 15 February 2006 +
A contamination survey was being performed … A contamination survey was being performed to relocate 16 cabinets in Room 25 of Magill Hall to change the use of the approximately 500 square foot storage room. These 16 cabinets had not been moved since the basement of Magill Hall went through a decontamination remediation related to an Americium 241 spill in 2000 (See EN# 37282 and EN# 37298). The contamination survey was conducted due to a license condition relating to the removal of equipment from the facility due to the spill in the year 2000. After the cabinets were moved, fixed Am-241 contamination was found . The contamination testing was limited to 20-25 spots of 100 square centimeters on the floor of Room 25, except for one spot on one cabinet. It is estimated that approximately 30% of the room floor has potential contamination. The highest spot had 80,000 dpm fixed contamination of Am-241 (release limit of 100 dpm). Many other spots ran in the 15,000-35,000 dpm range. The average spot was calculated at 5000 dpm of fixed contamination of Am-241. Air monitoring of the room shows only background levels. Individual counting of the air samples is in progress. There is no indication of airborne contamination at this time.</br>The room is now controlled by a high security lock which can only be opened by the licensee RSO. The room has been posted as a Radioactive Materials Contaminated Area. A very high percentage of the contamination is fixed. One round of decontamination using wet paper towels has reduced the contamination considerably but was not eliminated. The licensee estimates that it will perform up to 3 additional decontamination rounds using gentle techniques (wet paper towels) one week apart to allow the floor to dry between rounds. to allow the floor to dry between rounds. +
Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
Am-241 + and Americium 241 +
00:00:00, 16 February 2006 +
24-09296-02 +
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>.
22:39:22, 24 September 2017 +
17:00:00, 16 February 2006 +
1.083 d (26 hours, 0.155 weeks, 0.0356 months) +
15:00:00, 15 February 2006 +
URL"URL" is a <a href="/Special:Types/URL" title="Special:Types/URL">type</a> and predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> to represent URI/URL values.