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While attempting to close the shutter on a … While attempting to close the shutter on a Kay-Ray fixed gauge at a coal fired power plant located at 24th and Craig Street in Omaha, NE, the cable operating the shutter mechanism broke. The gauge contained 50 mCi of Cs-137. Plant operators manually closed the gauge shutter. There were no exposures to workers in the area.</br>The state will provide additional information when it is available.</br>* * * UPDATE FROM BRYAN MILLER TO JOHN SHOEMAKER AT 0908 EST ON 2/5/15 * * *</br>The following event update was received from the State of Nebraska via email:</br>The Nebraska Department of Health and Human Services, Radioactive Materials Program, was notified at 1455 hours (CST) on 01/30/2015 by the Tech. Supervisor, at Omaha Public Power District that a Kay Ray fixed gauge Model Number 7080, housing serial number 16784Y, source shutter failed to close. The device originally installed in 1984 with approximately 50 millicuries Cesium 137 now contains approximately 25 millicuries. The gauge which is part of a hopper level sensor is mounted between two fly ash hoppers approximately 20 feet off of the floor. The source closure mechanism on the gauge is connected to a handle located at floor level by a flexible cable. The closure cable are secured so that when the floor handle is operated, the control cable slides inside of the sheath thus opening/closing the shutter. One of the station's chemists was restoring the source to service following a maintenance outage. The 'external' source closure mechanism for Unit 4 precipitator was being placed in the open position when a metallic snap was heard when opening the source shutter. The source handle was half way to the open position when this noise was heard. The operator then proceeded to check the cables function by trying to move the shutter to the closed position . The source shutter did not move. Scaffolding was erected and an inspection of the device showed the source shutter was in the open position and that the cable was not connected to the gauge operating mechanism. The source shutter mechanism was moved manually to the closed position and the cable reattached and tested several times using the remote actuator. All functions were noted to be in working condition.</br>No personnel were unintentionally exposed to radiation during this event.</br>Cause: Defective or Failed Part.</br>Corrective Action Information: Equipment maintenance and repairs made without engineering change to the system.</br>Device/Associated Equipment: Kay-Ray/Sensall/Fixed Gauge, Model Number 7080, Serial Number 16784Y.</br>Source of Radiation: Amersham, Sealed Source Gauge, Model CDC 800, Serial Number 15112-V, with a CS-137 .025 Ci source</br>Nebraska Item Number: NE150001</br>Notified the R4DO (Miller) and NMSS Events Notification via email.r) and NMSS Events Notification via email.
14:20:00, 30 January 2015 +
50,780 +
16:31:00, 30 January 2015 +
14:20:00, 30 January 2015 +
While attempting to close the shutter on a … While attempting to close the shutter on a Kay-Ray fixed gauge at a coal fired power plant located at 24th and Craig Street in Omaha, NE, the cable operating the shutter mechanism broke. The gauge contained 50 mCi of Cs-137. Plant operators manually closed the gauge shutter. There were no exposures to workers in the area.</br>The state will provide additional information when it is available.</br>* * * UPDATE FROM BRYAN MILLER TO JOHN SHOEMAKER AT 0908 EST ON 2/5/15 * * *</br>The following event update was received from the State of Nebraska via email:</br>The Nebraska Department of Health and Human Services, Radioactive Materials Program, was notified at 1455 hours (CST) on 01/30/2015 by the Tech. Supervisor, at Omaha Public Power District that a Kay Ray fixed gauge Model Number 7080, housing serial number 16784Y, source shutter failed to close. The device originally installed in 1984 with approximately 50 millicuries Cesium 137 now contains approximately 25 millicuries. The gauge which is part of a hopper level sensor is mounted between two fly ash hoppers approximately 20 feet off of the floor. The source closure mechanism on the gauge is connected to a handle located at floor level by a flexible cable. The closure cable are secured so that when the floor handle is operated, the control cable slides inside of the sheath thus opening/closing the shutter. One of the station's chemists was restoring the source to service following a maintenance outage. The 'external' source closure mechanism for Unit 4 precipitator was being placed in the open position when a metallic snap was heard when opening the source shutter. The source handle was half way to the open position when this noise was heard. The operator then proceeded to check the cables function by trying to move the shutter to the closed position . The source shutter did not move. Scaffolding was erected and an inspection of the device showed the source shutter was in the open position and that the cable was not connected to the gauge operating mechanism. The source shutter mechanism was moved manually to the closed position and the cable reattached and tested several times using the remote actuator. All functions were noted to be in working condition.</br>No personnel were unintentionally exposed to radiation during this event.</br>Cause: Defective or Failed Part.</br>Corrective Action Information: Equipment maintenance and repairs made without engineering change to the system.</br>Device/Associated Equipment: Kay-Ray/Sensall/Fixed Gauge, Model Number 7080, Serial Number 16784Y.</br>Source of Radiation: Amersham, Sealed Source Gauge, Model CDC 800, Serial Number 15112-V, with a CS-137 .025 Ci source</br>Nebraska Item Number: NE150001</br>Notified the R4DO (Miller) and NMSS Events Notification via email.r) and NMSS Events Notification via email.
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>.
Cesium 137 + and Cs-137 +
00:00:00, 5 February 2015 +
01-39-04 +
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>.
01:48:37, 2 March 2018 +
16:31:00, 30 January 2015 +
0.0908 d (2.18 hours, 0.013 weeks, 0.00299 months) +
14:20:00, 30 January 2015 +
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.