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Assay and Acquisition of Radiopure Materials

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planning [2011/03/28 15:09] – [Veto Shield] 128.101.214.73planning [2011/05/09 12:33] (current) – [Gravity Meter] 24.245.16.19
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 Please feel free to login (first time will create account) and edit your section. I have put a few placeholders to show how this might work. Immediate needs refers to jobs you would like done by the mine crew as soon as there is any access. I have already communicated the need for SOLO, Gopher, and CoGeNT to keep radon plateout to a minimum.  Please feel free to login (first time will create account) and edit your section. I have put a few placeholders to show how this might work. Immediate needs refers to jobs you would like done by the mine crew as soon as there is any access. I have already communicated the need for SOLO, Gopher, and CoGeNT to keep radon plateout to a minimum. 
  
 +**update Monday, April 18  --**  
 +Full Power was restored to the lab over the weekend.  Cleaning crews and fiber optic cable splicing will occur through this week.  Computers will become available for remote access by the end of the week.  Currently expecting access may be as soon as mid-May, but we need to properly schedule visits, so we will being communicating directly with the experiments about their visits near the end of April.
 ==== CoGeNT ==== ==== CoGeNT ====
 === Immediate needs === === Immediate needs ===
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 Nitrogen purge for radon reduction (LN boiloff or N2 compressed gas) Nitrogen purge for radon reduction (LN boiloff or N2 compressed gas)
 === Plan for startup === === Plan for startup ===
 +  * Require pictures of the area to show debris
 +  * Determine if vacuum space requires repumping. Where is the vacuum port? Inside or outside of shield?
 +    * If outside, definitely pump
 +  * Proceed after lab has been cleaned
 +  * Wipe down Mylar
 +  * Restart LN, bias, take initial background spectrum
 +    * If this is OK, proceed with regular operation
 +  * If background shows contamination, open chamber and wipe down; open Mylar shield and clean outer Pb layers, inner Mylar surface
 +  * Retake background spectrum
 +  * If background still shows contamination, full disassembly and cleaning is likely necessary
 ==== Gopher ==== ==== Gopher ====
 === Immediate needs === === Immediate needs ===
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 ==== Veto Shield ==== ==== Veto Shield ====
 === Immediate needs === === Immediate needs ===
 +Make sure that the HV is all off while power is intermittant.
 +
 We would like to have the 5 veto computers up and running as soon as possible, so we can continue our DAQ work.  The question is when will the network be up, so we can use them remotely?  This is a high priority item for us. We would like to have the 5 veto computers up and running as soon as possible, so we can continue our DAQ work.  The question is when will the network be up, so we can use them remotely?  This is a high priority item for us.
  
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 === Plan for startup === === Plan for startup ===
 ==== Gravity Meter ==== ==== Gravity Meter ====
-If it is necessary to move the gravity meters then they should be clamped first. +=== Immediate needs ===  
-=== Immediate needs === +=== Plan for startup === The start up has been accomplished by Jerry Meier.  A replacement UPS power supply is being shipped to the Surface Building in Soudan for installation in the gravity meter setup. 
-Restart the two gravity meters and adjust the long and cross levels. + 
-=== Plan for startup === +==== Update from Marvin Marshak (Saturday, April 16) ==== 
-Whenever possible, I would like to bring the meter that is supported by foam back to my home.  If I am allowed to bring the instrument to the surface then I can come any time.  If someone else does this then the meter should be clamped first and I can meet them at the surface. + 
-==== Update from Marvin Marshak (Friday, March 25) ==== + 
-There was continued work in the shaft today and a brief entry into the Soudan Lab. +• Full electrical power was restored to the entire Soudan Laboratory TODAY. 
-  +DNR staff and an outside electrical contractor installed a new power cable 
-  * Today's shaft work focused on straightening a section of rail about 100 feet above the 27th level.  +between the 22nd and 27th levels. Lab staff then checked to be sure that 
-  +all circuits in the lab were shut off. Following this check, power was turned 
-  * The electrical cable between the 27th level substation and the lab was tested and passed with no faults. +on to the Lab substation via the new cable. Lab staff then turned on the lights 
-  +and HVAC system in the Lab. These systems appear to function normally. 
-  * The foam in the lab has collapsed to the floor, leaving some debris that was swept into the lab by the foam in the area between the entryway and the MINOS Detector. +The Lab closed loop cooling system also seems to function normally. 
-  +The Lab fire detection system is also functioning and will shut down power 
-  * All doors to the lab are now closed at the suggestion of Fermilab engineers. +to the lab, in the event of an alarm detection. 
-  + 
-  * The DNR and University staff have now worked continuously since last Thursday night. There will be no work this weekend, in order to rest the staff for next week. Work will resume on Monday. Steps are being taken now to augment the staff in order to provide longer access to the Lab for cleanup. +• The fiber optic cable has sufficient slack that it will be possible to cut out 
-  +the damaged section and re-splice the cable. The splicing contractor will 
-  * Next report will be Monday.+be working next week. 
 + 
 +• Representatives of cleaning companies will visit the lab on Monday to 
 +prepare estimates for general clean up of the lab, including remnants 
 +of the foam and the debris brought in by the foam. 
 + 
 +• ECI, the contractor hired by the DNR to do shaft renovations, will have 
 +key personnel on site this coming week, beginning with an on-site pre-construction 
 +meeting on Monday. CNA Engineering has also been hired to provide 
 +geo-technical advice to ECI. A CNA engineer will also be on site this 
 +coming week. A likely arrangement beginning this coming week is that 
 +lab and DNR access to the mine will occur on a first shift, possibly beginning 
 +at 6 am, with ECI shaft work on a second shift, possibly beginning at 2 pm. 
 + 
 +• Work in the lab this coming week will focus on re-starting the MINOS 
 +Detector, beginning with checks of control system electronics and work 
 +to dry out the magnet cables. 
 + 
 +• The sprinkler contractor has submitted drawings to the University Fire 
 +Marshal for the repairs to the sprinkler system. Approval of the drawings 
 +and repair work is also expected to start this coming week. 
 + 
 +• The University has hired CNA Engineering and Don Zeni,  a specialized drilling 
 +consultant, to evaluate the feasibility of providing an alternate access to the 
 +lab through either a ~6 inch diameter hole and/or a ~4 foot  diameter hole. 
 +A small hole would enable an independent path for communications, power and 
 +high pressure air ventilation between the surface and the lab. The larger 
 +hole would also enable a secondary, emergency egress, in addition to the telecom 
 +and power connections. 
planning.1301342953.txt.gz · Last modified: 2011/03/28 15:09 by 128.101.214.73

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