ID |
Date |
Author |
Category |
Type |
Specific |
Subject |
123
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Thursday, November 06, 2014, 17:18 |
Ron Kuramoto | Repair | Target 2 | Cooling | 1AT2 Collimator B, faulty Thermister water out temperature | On 14Oct2014, the 1AT2 Collimator B water outlet temperature rose to 100o C.
Troubleshooting the T2 Collimator B water out temperature (T7) by swapping it's analog signal in PIE box #2 with T2 Collimator A water out temperature (T6) to see if problem follows. See if unplugging T7 signal causes Safety Page SV7 1A Collimators error signal goes okay.
Tony Tateyama 2014-10-14 11:29:36
PIE box channel for T7 appears to be okay as a known good level signal (T6) was connected, and channel warning & trip went okay. Safety Vertical page SV7 1A Collimator signal went okay after removing bad signal from PIE box, and resetting trips on two panels at T1/T2 racks. It appears that the sensor for T7 has become faulty.
See interlock defeat #7128
Approved by Doug Preddy
Shorting 2 pin lemo plug K3 of #1 046418 Interlock units in Rack 1-A south side mezzanine in the Meson Hall. Cable # 12708 to removed to insert short.
Will look into replacing the faulty Thermister in the 2015 major shutdown. |
124
|
Thursday, November 06, 2014, 17:22 |
Ron Kuramoto | Repair | Target 2 | Cooling | 1AT2, faulty Thermister water out temperture |
Summary: Clarification of T2 water temperature readouts
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Detail: This e-log entry by Doug Preddy is being made to clarify the T2 water package temperature read outs. The temperature read outs on the T2 water package have been switched. The read out for inlet temperature is actually the outlet temperature and the read out for outlet temperature is actually the inlet temperature.
On Sunday Oct 19 2014 at 19:45, the T2 water outlet Temp (T2) started to climb giving warning messages at 20:05. Operators tried to decrease the BL1A current, but the temp. continued to climb and eventually tripped the beam off. Operators defined BL1A OFF, and continued to inject to BL2A only. They tried to contact I. Earle, but were unable to. They left message with D. Preddy. The T2 temp. stayed at 45 deg., operators tried to reset the water package and start it, but it tripped almost right away, and increased the temp. by 0.5 deg. Beam was left off.
On Monday Oct. 20 Ron Kuramoto found a replacement thermister. It was wired in to the BOP over the south catwalk. The T2 outlet temperature immediately dropped to ambiant. From this test it was concluded that the installed thermistor on the T2 outlet water pipe had failed. The wiring was restored to the original configuration.
It was decided to switch T2 Water Inlet Temp and Outlet Temp sensors at the T2 electronics rack to provide a trip on the Inlet Water temperature instead of the outlet Water Temperature. As the T2 water package runs in a closed loop, the outlet temperature signal has been swapped with the inlet temperature by Doug P. and Tony T. This will provide thermal protection (trip at 45C) in addition to the T2 Target high limit bit (trip at 60C). The water flow to this circuit is also monitored and will trip if the flow drops.
This action was approved in a meeting with Doug Preddy, Ron Kuramoto, Grant Minor, Yuri Bylinski, Lia Merminga, and Bob Laxdal present on Monday Oct 20th. There is a second, redundant temperature sensor on the outlet of the target water which was installed recently as a safety upgrade to protect the heat exchanger and meet CSA pressure vessel code, see dwg TBP0902. There is a controller for this sensor with a hard-trip switch for the cyclotron, and a temperature read-back display on the Meson Hall mezzanine racks. This read-back should be monitored by operations once per shift while beam is on target to ensure that outlet water temperature is stable and at an expected value.
Sensor cabling swapped at Meson Hall, south mezzanine, bay 1, B.O.P. #3. Sensor T1, cable #12102 moved to TB1, terminals 3 & 4. Sensor T2, cable #12105 moved to TB1, terminals 1 & 2. Defeat #7131 removed.
Defeat# 7133
Fault report #7722
Will look into replacing the faulty Thermister in the 2015 major shutdown.
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176
|
Friday, October 02, 2015, 17:25 |
Ron Kuramoto | Standard Operation | Target 1 | Target | Raise Target to lower Rad levels for 1AM7 repair | Today the T1MK2 target was moved from Position 4 to Position 0 to lower the Rad fields for the 1AM7 repair in the 1A Tunnel. The Rad levels were still to high only dropping by 1000uSv/Hr to 5000uSv/Hr, so the 1AM7 repair is planned for next Tuesday's maintenance day on Oct 6th. 1A will be off till then giving a longer cool down.
The target was then moved moved back to Position 4 with the Pot ratio reading 0.699. The target was moved using the portable Control box. The "power on light" on the Control box needs to be replaced.
Note: The MS connector on the 1AT2 cable needs to be tighten before using. It became loose when swapping the portable Control box cable to the 1AT1 cable.
The cooling package turned on ok after the vacuum was established.
Don Jackson assisted me with this operation and was appriciated....
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259
|
Wednesday, March 04, 2020, 13:42 |
Ron Kuramoto | Repair | Other | Other | B/L 1A vacuum air leak repair | A 4” Marmon aluminum blank-off flange and o-ring were replaced on the south port of the T1 target monolith vacuum vessel. This port was accessed from the 1A Service Tunnel were the repair took place.
See the attached pdf file “1AT1 Vacuum Leak Repair-Feb2020” for a summary of the repair. |
Attachment 1: 1AT1_Vacuum_Leak_Repair-Feb2020.pdf
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248
|
Friday, January 25, 2019, 10:53 |
maicodallavalle | Repair | Other | Cyclotron electrical | Cyclotron Elevating system Motor electrical wire repairs | 2018 Cyclotron lid up problem. Station #9 was found to have the motor wires along the beam plain had damaged wire insulation. There were bare wires in the conduit resulting in the wires shorting out. The wires were repaired with a quick short replacement. Lid went up for in tank work. After lid down the problem was investigated. We checked the radiation levels at all of the stations to come up with a plan to determine witch of the stations had the highest levels. We found that stations 1,3,5,7,9, and 11 had the highest levels. Station 1 was inspected and all wires were replaced to the T elbow. Station 3 all wires were replace to the T elbow. Station 5 all wires were replaced to the T elbow. Station 7 all wires were inspected and were in good condition and put back into place. Station 9 all wires including syncro were replaced all the way to the junction box. Station 11 motor wires were good, but the jog wires and the syncro were replaced to the pull box. All of the jog switches on stations 1,3,5,7,9,and 11 were falling apart when wires were inspected. New switches were ordered and assembled. At the start of 2019 shutdown all jog switches were replaced on stations 1,3,5,7,9, and 11. After all the jack work was finished the jog switches were check and were working well. |
321
|
Thursday, March 02, 2023, 06:59 |
maicodallavalle | Maintenance | Target 1 | Cooling | Refilled Expasion Tank | I have refilled the water package on T1 with DI water. The Expansion Tank is at 37cm. This may change when pump is turned on. |
322
|
Thursday, March 02, 2023, 07:04 |
maicodallavalle | Maintenance | Target 2 | Cooling | Refilled Expasion Tank | I have filled the water package on T2 with DI water. The expansion tank is at 38.1cm. This may change when the pump is turned on. |
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