 Wednesday, April 21, 2021, 11:18, David Wang, Cooling, Maintenance, , , Refilling high active wtaer system and starting HA water pumps.
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High active water system is refilled. Air are drained out of system before pump to be started. Following sequence are used to bring the whole system
back to operation:
1. close ITE , open ITW. Switch on the pump. Only 2A beam line related 5 water circuits are in loop in ITW. Switch off pump when system pressure |
Tuesday, February 15, 2022, 11:18, Frank Song, Cooling, Repair, , , Replace 2 leak valves on high active water system 
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The valves #V10 & V11 beside high active water pumps were replaced in Target Hall, pics attached.
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Wednesday, February 16, 2022, 15:19, Frank Song, Cooling, Repair, , , high active cooling water valves repaired/replaced
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A 3/8 inch drain valve on return cooling line was replaced in ITE. In the meantime two 1/2 inch valves labeled FEBIAD COIL and ENTRANCE COLLIMATOR
RETURN at ITW were replaced . The 2 inches leaky supply/return water valves in ITW were repaired as well. Pls check pics
attached here for detail. |
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Wednesday, March 01, 2023, 09:27, David Wang, Cooling, Maintenance, , , Two filters on HALCW resin circuit have been replaced.
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Two filters on HALCW resin circuit have been replaced. O-ring 235# were changed on both filter cartridge houses. 25micron 10"x 2.5"
3M cartridge new filters are used. Old filters are not very dirty. They are bagged and stored in vacuum pit. Residual water from cartridge houses
are collected and stored in high active storage jug with sealed cap. No leak on resin circuit before and after the job. |
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Wednesday, March 01, 2023, 09:34, David Wang, Cooling, Maintenance, , , Visual inspection of HALCW for possible small water leak or drip.
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I visually inspected HALCW system including water station section, both target pits, and de-ionizer system. No small leak and drip was found .
The inspection in both target pits will be repeated after flow sensors are replaced. |
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Wednesday, March 08, 2023, 06:32, David Wang, Cooling, Maintenance, , , HALCW flow sensors replacement.
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HALCW flow sensors replacement job is done. All ITE/ITW(except ITE HS) return line water flow sensors including paddle wheels and coils are replaced.
After job, water interlock signal have been checked in electrical room . Everything works fine. Visually inspections for possible water leak on HCLCW
system have been done as well. one valve on ITE dump return line has a very small water seeping through valve stem. I will watch on it. Other than |
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Wednesday, March 08, 2023, 09:19, David Wang, Cooling, Standard Operation, , , HALCW ITC:MP1/MP2 motor phase current measurement.
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HALCW ITC:MP1/MP2 motor phase current measurement is done by Joel from electrician group. MP1:17.1A/17.2A/16.7A. MP2: 17.9A/17.9A/17.3A.
19.5A is manufacturer notified on full load phase current.on operating instruction manual. |
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Wednesday, March 08, 2023, 13:57, David Wang, Cooling, Standard Operation, , , HALCW ITC:MP1/MP2 pump and motor temerature measurements
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HALCW ITC:MP1/MP2 pump and motor temperature measurements result:
MP1: pump discharging port: 78F, motor rear bearing house:72F , Motor housing 140F(60C). 6F difference between them is less than
15F manufacturer clarified up limit in instruction manual. |
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Monday, April 24, 2023, 10:18, David Wang, Cooling, Maintenance, , , HALCW flowmeter transmotters inspetion and calibration.
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ITW, ITE, ITW +ITE total , and low active cooling water return flow meter transmitters are inspected and calibrated. Result:
ITW , PX-750-06Di , Calibrated to 4-20 mA for 0 to 6" H2O DP, linear. Transmitter works fine.
ITE. PX-750-06Di, calibrated to 4- 20mA for 0 to 6" H2O DP, linear. Transmitter works fine. |
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Friday, October 13, 2023, 11:46, David Wang, Cooling, Maintenance, , , HALCW system O2 sensor service and calibration.
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HALCW system O2 sensor service and calibration were done in Sep 26th. electrolyte and membrane on rose mount sensor 499ADO were refilled and replaced.
Sensor was zero and full scale calibrated. The sensor works fine after the job. |
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Friday, February 16, 2024, 11:48, David Wang, Cooling, Maintenance, , , high active water transferr to holding tank
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100 liters of high active water from HALCW system( mostly from s-tank and pipe lines closing to pumps) are transferred to holding tank in 2A tunnel.
Transfer is smooth. it is a preparation job for ITC:MP1/MP2 refurbishment. water sample is passed to RPG for assay. |
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Thursday, April 04, 2024, 13:10, David Wang, Cooling, Maintenance, , , high active water refurbishment, reinstallation, and test operation.
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both high active pumps ITC:MP1 and MP2 are refurbished by RH group Maico and Peter. Pumps have been installed back to system with new inlet/outlet flange
gaskets. high active water surging tank is refilled with water and pumps were primed. I asked operator to switch on pumps separately. Both pumps work fine.
They are quiet and pumps discharging pressure is a little bit better comparing to before refurbishment. Nitrogen gas is injecting into system. O2 level |
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Monday, April 08, 2024, 09:29, David Wang, Cooling, Standard Operation, , , HALCW system general inspection.
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water are supplied to both ITE and ITW. I did a general inspection on HALCW system. Two small leaks on 2" shut off valves are fixed. No other leak
has been found so far. all water flow meters work fine. MP2 pump discharging pressure is ok which is just above 100 psi on local gauge reading. pump noise
are low. pump body temperature is less than 45C which is good. |
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Wednesday, September 25, 2024, 07:25, David Wang, Cooling, Maintenance, , , HALCW O2 level sensor maintenance.
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HALCW O2 level sensor annual maintenance is done. sensor membrane has been changed and electrolyte has been refilled. gauge is calibrated. It works normal
after the job. |
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Monday, February 03, 2025, 13:10, David Wang, Cooling, Standard Operation, , , HALCW pump ITC:MP1 has been started.
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HALCW pump ITC:MP1 has been started. water are supplied to both ITE and ITW system. all water signals for individual circuits work fine. no major leak
on system. Some small water seeping from small ball valve stems are found in ITW. they will be fixed soon. |
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Friday, February 21, 2025, 09:18, David Wang, Cooling, Standard Operation, , , HALCW pump ITC:MP1 and MP2 phase current draw measurement.
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HALCW pump ITC:MP1 and MP2 phase current draw measurement result: water supplied to both station. MP1: Black 17.0A, blue 16.9A, red 16.7A.
MP2: black 17.3A, blue17.8A, red 17.3A. The results are good. No concern on both motors. |
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Monday, February 24, 2025, 11:15, David Wang, Cooling, Maintenance, , , ITW/ITE water system manual valves water small leak inspection and repairing.
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ITW/ITE water system manual valves water small leak inspection and repairing job is done. Small water drippings have been found on ITE: manual
supply and return(valve stems). ITW: 2A window supply(valve stem), collimator supply(valve stem),EE return(valve stem), HS supply and return(valve
stems), tube heater supply and return(valve stems). all small leaks are repaired. |
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Monday, March 03, 2025, 15:33, David Wang, Cooling, Maintenance, , , HALCW resin can loop two filters have been replaced.
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| HALCW resin can loop two filters have been replaced. no water leak on after job check. |
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Friday, March 07, 2025, 09:16, David Wang, Cooling, Maintenance, , , Service of 28 female Parker 1/4 quick connectors in ITW and ITE
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Service of Parker 1/4 quick connectors in ITW and ITE have been done. all 28 female connectors were serviced. o- rings and valve stem in
quick connectors were replaced. the serviced connectors have been installed back to ITW and ITE. Visually inspected all connectors with flowing through
them. No leak, and they function well. |
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Thursday, June 30, 2011, 16:04, Pierre Bricault, Conditioning Station, Repair, TM1, , TM1 status
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Friday June 24 2011
The target module has been moved to the Conditioning Station (CS)
Pumping overnight |
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