 Monday, March 06, 2017, 08:01, David Wang, Cooling, Repair, , , HALCW resin tank replacement. 11x
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HALCW resin tank has been replaced. The old tank is stored in middle-west silo now. The field on old resin tank bottom is about 3.5 msv/ hr(on contact).
By shielding it into silo and putting two lead blankets on the top cover of the silo,The general field 1 feet above this silo is 25usv/hr. And, The field
around the silo area are less affected. This old tank will stay there as long as possible. For the new resin tank during preparation, It was found |
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Thursday, January 02, 2020, 09:55, David Wang, Cooling, Standard Operation, , , I turned on HALC water pump MP2.
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HALCW MP2 is switched onnow. There is a small amount of air trapped in system. The pump works fine. Water level and system resistivity will be
monitored for a while.
LALCW P5 and P6 are switched on for cooling HALCW. HALCW MP2 is in operation now. |
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Tuesday, January 07, 2020, 08:02, David Wang, Cooling, Standard Operation, , , Switch on HALCW MP2
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HALCW MP2 is switched on this morning after yesterday cooling tower maintenance. LALCW P5 and P6 pumps are started by isac operator as well. The
system is good so far. |
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Monday, January 27, 2020, 10:40, David Wang, Cooling, Maintenance, , , ITE/ITW supply water presuure on dump circuits.
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With both stations in operation,ITE dump supply gauge reading is 27 psi. ITW is 20 Psi. I adjusted ITW dump pressure to 25 psi by changing the
return line side pressure relieve valve.
ITE full operation+ ITW no TM: ITE dump pressure 27psi, ITW dump pressure 27psi. |
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Wednesday, May 20, 2020, 13:08, David Wang, Cooling, Standard Operation, , , Start of HALCW sysytem
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High active water pump is started. The system resistance is recovering now. Everything works fine so far. Check ITW and ITE water leak after pump
is started. Tiny very slow seep on two small ball valves pack seal. No big concern.
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Wednesday, January 27, 2021, 14:30, David Wang, Cooling, Development, , , High active water system purging
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High active water are purged to holding tank at B2 level. There should be around 48 gallons are purged out of system. No purging on dump circuits
on both ITW/ ITE. |
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Monday, April 12, 2021, 13:45, Anders Mjos, Cooling, Maintenance, , , New T installed for instrumentation loop on HALCW system
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Adrian and co installed a new T to be able to add an instrument loop for O2 and pH monitoring on the low conductivity water systtem (photo). See WP I2021-04-09-4
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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 |
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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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