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 that on return line side, the 1.25" pipe thread plug with return line tube  was very difficult to be installed onto the female thread adapter which is welded onto to tank body. It was jammed in half way of threading onto tank at manufacturer. This plug was removed out first and inspected. The first and second male threads were galled.  Maico repaired the thread on a lathe. The female thread on the tank was tapped. A tight spot was found during the tap. After that, the return line plug could be installed onto the tank properly.  The new tank was installed into the vessel and connected back to HALCW system. Water are refilled into new tank. During refill air were trapped into the system. This caused  pump restarting problem. By Several times of starting up the pump, stopping the pump and venting,  Most air were breathed out of  system. Finally,The system was restarted by supply water to ITW( without module) only. ITE and resin can circuits were brought back to system after that without problem.

 Before removing the old tank, We drained water out of old tank to decay tank. Since the resin tank is largely filled with  resin, and water are soaked into resin, we only can drain out less than 10 liters water out of tank. Also, The drain caused some part of return line on pumps have to been drained. This is the main reason air was trapped in system during the new resin tank water refilling. For the future replacement, we should not drain water in old tank. It does not worth to do it. 

Attach TH HALCW resin tank replacement procedure here.

2022-02-17 reload replacement procedure and draining schematic.

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.

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.

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.

2019-01-30: Water only supply to 2A beam lines only on both side, No TM2 and TM4 in water loop.  ITE dump pressure 27psi, ITW dump pressure 27psi.

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.                                 

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.

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

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 is stable above 100 psi.

2. Close ITW, open ITE. Switch on the pump. Only 2A beam line related 5 water circuits are in loop in ITE. Switch off pump when system pressure is stable above 100psi.

3. Open ITW, Open ITE. Switch on pump. both ITW and ITE beam line related water circuits are in loop.  Switch  off pump when system pressure is stable above 100psi.

4. Close ITE open ITW.  Bring ITW  target module water circuits back to loop by connecting bypass fittings on to circuits. Only bring one circuit back to system at first. Switch on pump. Wait for system pressure stabilized. Then Close ITW. bring next circuit back  to system.  Open ITW .  wait for pressure stabilized.  repeat the process until all water circuit and connected with bypass fittings in ITW.

5. Check possible leak on valves, fittings, and flow sensors in ITW pit.

6. Go to electrical room, check all ITW water signal status.

7. Close ITW, Open ITE. Repeat same procedure as step 4 on ITE target module water circuits.

8. Check possible leak on valves, fittings and flow sensors in ITE pit.

9. Go to electrical room, check all ITE water signal status.

10. Open ITW.  At this stage, full ITE station and half of ITW station water circuits are in operation.  Check possible leak on pumps, valves, fittings, gauges on water station at TH west end.

11. Keep system in operation. Watch on - tank level , system pressure, and conductivity on resin circuit and whole system.

 The valves #V10 & V11 beside high active water pumps were replaced in Target Hall, pics attached.

 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.

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.

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.

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 that,  No major concern.

2023-03-08: leak on 1/2" ITE dump return line valve is fixed.

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. 

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. 

MP2: pump discharging port:78F,  motor  rear bearing house:72F, Motor housing 122F(50C).

MP1 is better than MP2 on motor status. It could be seen on phase current measurements as well.

Other notes on pump performance:    total flow rate 60GPM , discharging gauge pressure  99 to 100 psi on both pumps with one station all of TM water circuits bypassed + other station  two of TM water circuits bypassed + both stations 2A beam related water circuits  on(2X5).

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.

ITE+ITW total, PX-750 -30 SQDI.  It looks like electronic board for square root output is broken. It can not be calibrated  to 4mA @ 0 inch H2O DP. The transmitter is calibrated to 10.25mA - 25.25mA for 0 to30" H2O DP, linear. Transmitter works fine.

 Low active cooling water return, Px-750-30di, smart.  The transmitter is broken. The output current stuck at 44.5mA on all DP.  I tried zero and reset it by following instruction manual, but failed to bring it back. The electronic boards are broken mostly. The production is discontinued by Omega Engineering. A new Omega transmitter PX3005-25WDWBI (linear) will be ordered for its replacement.

2023-06-28: A new Omega transmitter PX3005-25WDWBI (linear) has been installed back to LALCW system in target hall. Transmitter is calibration by manufacturer @ 4-20mA output@0 to 25 in H2O DP. Control group will finish the cable connection in TH, electrical room, and reprogram   on epic page on July -11th.

2023-07-12: Cable connection, formula reprogram, and epic page reboot are done yesterday by Ray.M. New transmitter works fine. All flow rates are displayed on epic page properly with new program formulas.

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.

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.

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 is decreasing and R is going up.

2024-04-09: Joel.S checked pumps phase current draw: MP1 16.8 to 17.1A on each phase. MP2 17.0 to 17.2 A on each phase. They are normal. Pump body temperature are below 45C which is fine. 

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.