 Friday, October 28, 2011, 14:42, Bevan Moss, South Hot-Cell, Maintenance, TM4, , Leak check on service cap feed through 
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After Chad and Davids leak check results from the containment box it was decided to perform a leak check on the feed through stem in the service
cap. This is a known point of failure on TM1 and the same design flaw is likely in TM4. Once the service cap was open a visual inspection was performed
and some oxidization of the copper line on the tube heater (+) circuit was observed (see attached pictures). The leak check was performed with the cart |
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Monday, October 31, 2011, 08:51, Travis Cave, South Hot-Cell, Standard Operation, TM4, SiC#26 High Powered, Module move
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| TM#4 with SiC#26 HP moved from the south hot cell to the conditioning station. |
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Wednesday, November 16, 2011, 07:44, chad fisher, South Hot-Cell, Standard Operation, TM1, TaC#1, TaC#1 Removal and inspection
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November 15, 2011 removed TaC#1 from TM1 and inspected TM1 for any obivous signs of trouble (Problems with EE at end of run).
Upon starting removal of the high current conductor fastener on A+ (Left oven leg) it became clear right away that the oven of the target was broken
as the leg moved as soon as the fasten was loosened. |
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Wednesday, November 16, 2011, 07:46, chad fisher, South Hot-Cell, Standard Operation, TM1, TaC#1, Inspection of TaC#1
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Inspection of TaC#1 showed that the oven was indeed broken on the A+ (left oven leg) side of the central block.
See the following for pictures.
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Friday, November 18, 2011, 09:44, Travis Cave, South Hot-Cell, Standard Operation, TM1, UCx#3, Electrical check
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Electrical checks of TM#1 with UCx#3 have been completed. They all appear to be with in operational range. All megger checks were done at 500 volts.
See attached file for details. |
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Friday, November 18, 2011, 09:56, chad fisher, South Hot-Cell, Standard Operation, TM1, UCx#3, UCx#3 Installation
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UCx#3 has been installed on TM1.
Leak check also complete.
Base Leak Rate 0.0 x 10-9 |
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Monday, March 12, 2012, 09:19, Travis Cave, South Hot-Cell, Standard Operation, TM1, UCx#3, module move
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| TM#1 with UC#3 was moved from the west maa to the south hot cell, move went well |
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Monday, March 12, 2012, 10:03, chad fisher, South Hot-Cell, Standard Operation, TM1, UC#3, UC#3 Removal
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UC#3 was removed from TM1 this morning. Upon removing the oven heater bolts BOTH legs fell demonstrating that both sides of the oven tube have
broken off from the central block.
Target was put into a can under argon for disposal after the module is removed from the cell. |
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Monday, March 12, 2012, 11:54, Travis Cave, South Hot-Cell, Standard Operation, TM1, no target, module moved
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| TM#1 has been moved from the south hot cell to the north east silo, move went well. |
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Tuesday, March 13, 2012, 09:42, chad fisher, South Hot-Cell, Standard Operation, TM1, UCx#3, UCx#3 Autopsy
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An autopsy was performed on UCx#3 yesterday afternoon. This autopsy followed the plan written by Anders. Indeed, both sides of the target oven had seperated
from the central block.Pictures were taken by Anders and Pierre.
After the disection the target was placed back in a can under argon. Any small piece were placed in a zip lock bag and also put in the can under |
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Tuesday, March 13, 2012, 09:43, chad fisher, South Hot-Cell, Standard Operation, TM1, UCx#3, UCx#3 to spent vault
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UCx#3 was packaged into a spent can, double bagged and the bag and cans filled with argon as much as possible. Lid was attached and can moved to the
storage vault. The target was placed in in Pail 93, and placed into slot 1C of the vault, it was 11.7mSv/hr when removed from the south hot cell. See attached
file for latest vault details |
 Tuesday, March 13, 2012, 12:24, Anders Mjos, South Hot-Cell, Standard Operation, TM1, UCx#3, UCx#3 Autopsy
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chad fisher wrote:
An autopsy was performed on UCx#3 yesterday afternoon. This autopsy followed the plan written by Anders. |
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Tuesday, April 17, 2012, 10:15, chad fisher, South Hot-Cell, Standard Operation, TM1, Nb#6, Target inserted into south hot cell
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Nb#6 has been inserted into the south hot cell in preparation for ionstallation onto TM1. During the pre-insertion inspection I noticed that I could
see the foil installed into the ionizer tube and that in did not seem to be seated or concentric to the tube itself. I had Anders and Friedhelm check this
and they deemed that it was ok. |
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Tuesday, April 17, 2012, 11:30, Travis Cave, South Hot-Cell, Standard Operation, TM1, no target, module moved
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TM#1 moved from conditioning station to the south hot cell, the module had a field of 16mSv/hr. The move was not without excitement as the crane
decided on its own to move 2 inches west on two occasions during the move.On the second time that the errant moved happened I hit the E-stop on the crane
kill the power, the first time it happen it stopped the errant movement on its own. |
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Thursday, April 19, 2012, 09:36, Travis Cave, South Hot-Cell, Standard Operation, TM1, Nb#6, Electrical check
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| Electrical check has been completed of TM#1 with Nb#6 attached. Our new micro-ohm meter was also used for the first time for this test. |
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Thursday, April 19, 2012, 09:48, David Wang, South Hot-Cell, Standard Operation, TM1, LP SIS Nb 6, leak check heat shield circuit
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Chad and I did a leak check on TM1 Nb5 target heat shield circuit. The leak detector was connected to heat shield circuit.The pumping down of the
circuit is very smooth.Base leak rate is 0.0xE-9atm.cc/sec,and the base pressure is 0.0xE-4 torr. Chad checked the helium flow downstairs .He sprayed helium
to both up and down VCR joints 2seconds each time. There is no any response on leak detector(30 seconds waiting time). Both joints did the same test twice, |
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Tuesday, May 15, 2012, 11:45, Travis Cave, South Hot-Cell, Standard Operation, TM4, SiC#26, Electrical check
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| Results of the electrical check of TM#4 with SiC#26 attached post beam. |
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Tuesday, May 15, 2012, 12:14, chad fisher, South Hot-Cell, Standard Operation, TM4, SiC#26, SiC#26 removal TM4 degredation 19x
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SiC#26 was removed from target module #4 this morning. Target shows the now standard arc marks on the 9 pin connector housing...pictures to follow.
Of greater concern is the amount of "plating out" or "arc" marks on both the insulators and connductor of the TM4 source tray.
I will again warn that the source trays historically have a life expectancy, and that TM4 continues to show visual signs that the current |
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Tuesday, May 15, 2012, 14:29, Travis Cave, South Hot-Cell, Standard Operation, TM4, no target, module move
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| TM#4 moved from the south hot cell to the north east storage silo. No issues with the move. |
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Thursday, May 17, 2012, 14:08, Travis Cave, South Hot-Cell, Standard Operation, TM4, no target, module move
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| TM#4 has been moved from the north east silo to the south hot cell for target installation. No problems with the move. |
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