| ID |
Date |
Author |
Category |
Type |
Module |
Target/Number |
Subject |
|
2237
|
Friday, July 30, 2021, 16:31 |
Carla Babcock | ITE | Repair | | | ITE re-wire |
See the attached for the way ITE has been re-wired for the Ta62 run. Note also that the copper block in the schematic on TBHT negative may not actually be connected. Wiring verification on Aug. 4. |
| Attachment 1: ISK4425D-rev9._APshortmitigationsvg_july27update.png
|
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2236
|
Friday, July 30, 2021, 16:19 |
Carla Babcock | ITE | Repair | TM4 | Ta#62 | Electrical issues on Ta62 |
TLDR: TBHT voltage too high and rising too quickly with TGHT current - voltage limited. TGHT power supply tripped breakers somehow. ITE:EL not outputting voltage.
A short between feedthroughs A and P developed at the end of the p2n run in this module, and was fixed by Chad prying apart the lines in the source tray with a long teflon bar. We did not take the containment box off to fix it properly for reasons of time and also potential damage to the containment box. This seemed to fix it and David measured around 13MOhms between A-P when the module was installed in ITE. To make sure we could recover if the short reappeared during the run, David did not connect the P/Q feedthrough to HV common on the module top as usual, but it was connected in the electrical room. I also unhooked the busbar from the coil power supply.
When trying to start the TGHT ramp up, it was discovered that ITE:TGHT had a fault in its readback circuit, which was showing negative voltages. Not sure how this happened, since the power supply was not used for the previous p2n run, maybe an HV spark? This supply was replaced with the spare (SN 1161-9894).
When TGHT and TBHT were able to be ramped up, we found that the tube heater voltage was increasing too much with the target current. Normally the rate of increase is about 0.0004 V per amp on TGHT. This time it was 0.004 V/A. This was causing the TBHT to be voltage limited, which I thought could be related to the AP short. So I re-wired it such that the P feedthrough (#7 in the electrical room) was disconnected from everything except it was tied to feedthrough A (#1) using a 100 Ohm resistor. This should prevent it from floating and also prevent current from going through. See documentation in the Target Records folder (https://documents.triumf.ca/docushare/dsweb/Get/Document-204373/July272021_ITETM4_electricalissues.pdf).
During the subsequent ramp up, the TGHT power supply tripped the breakers when it was at 500A, 8V. The cause of this is still uncertain, and the TBHT voltage issue persisted after the wiring change. In the interest of time we decided to stay conservative on the currents used and continue to run like this. It may also be possible that the copper block which is supposed to reference TBHT negative to HV common is not attached.
Finally ITE:EL is still not working. It shows a value on the front of the PSU but doesn't draw enough current and doesn't affect the beam. We are running without it and it will hopefully be fixed on the Aug. 4 maintenance day.
These electrical issues bear some resemblance to those with Ta61, but I don't think we ever determined the cause there. |
|
2235
|
Tuesday, July 20, 2021, 09:46 |
Adam Newsome | ITE | Standard Operation | TM4 | | Remotely moved TM4 from TCS to ITE |
TM4 was moved from the conditioning station to the East target station. |
|
2234
|
Thursday, July 15, 2021, 09:02 |
Adam Newsome | Spent Target Vault | Standard Operation | | | Emergency Close Mechanism Test |
The emergency close mechanism for the Storage Vault door was tested by Adam Newsome and Travis Cave. The door was opened to its fully open limit, then closed with the emergency system.
The test was successful. |
|
2233
|
Thursday, July 08, 2021, 11:45 |
David Wang | South Hot-Cell | Standard Operation | TM4 | Ta#62 | TM4 Ta#62 leak check and lectrical check result at SHC and TCS. |
At SHC: HS line no leak . electrical check result is fine. At TCS: helium pressurized HS line to 70psi, 3 minutes. LD leak rate 0.0xE-9atm.cc/sec , no response. |
| Attachment 1: Ta#62_Tm4_elecrical_check_and_leak_check_result_at_SHC.pdf
|
|
|
2232
|
Thursday, July 08, 2021, 11:36 |
David Wang | Conditioning Station | Standard Operation | TM4 | Ta#62 | Remotely remove TM4(Ta#62) from SHC to TCS. |
Remotely remove TM4 (ta# 62) from SHC to TCS. The moving is smooth. |
|
2231
|
Wednesday, July 07, 2021, 11:59 |
Adam Newsome | Safe Module Parking | Maintenance | | | Annual Electrical and Mechanical Inspection |
An annual electrical and mechanical inspection was performed on the SMP today by Adam Newsome, Dan McDonald, and Jason Zhang as per Work Permit I2021-07-07-3. The following items were checked:
- Check condition of wiring for physical/radiation/UV damage
- OK, no signs of significant damage
- Check for cable tray debris or damage
- There were multiple shards of plastic in the cable tray - they were removed and disposed of
- Check inside control panel: components and wiring, labeling
- Labeling intact, components in good condition
- One COM wire for the relay array was loose - it was tightened
- Verify camera views
- This was not inspected but has recently been checked, and is checked prior to remote operation
- Check connectors for damage
- Check pendant for damage and verify labeling intact
- Lid open/close test
- Lid was opened and close multiple times - smooth operation, no concern
- Lid close logic was checked - OK
- Vessel rotation and limit switch check
- Both CW and CCW limits were checked, functioning
- No concern on rotation - chain drive, rotary limit switch, and cable reel all functioning normally
- Lubricate chains
- Inspect tensioners
- Tighten fasteners
- Done - OK
- Note: some concern over socket head screws in slotted parts - they should have washers. Not a critical issue but worth checking into.
- Visual inspection
Overall the inspection was successful. |
| Attachment 1: Capture.PNG
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| Attachment 2: PXL_20210707_162143876.jpg
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| Attachment 3: PXL_20210707_162918257.jpg
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|
2230
|
Wednesday, June 30, 2021, 14:11 |
Matthew Gareau | North Hot-Cell | Standard Operation | | | North Hot Cell Commemorative Opening |
Yesterday a bottle of Cava (sparkling wine) was place, opened, and poured in the NHC, to commemorate its new operational status.
The NHC is now a functional hot cell and is ready for many years of target exchanges to come. |
|
2229
|
Tuesday, June 22, 2021, 15:35 |
David Wang | ITW | Standard Operation | TM2 | UCX33# | TM2 has been connected it ITW. |
TM2 has been connected it ITW. All turbo pumps are started. |
|
2228
|
Friday, June 11, 2021, 10:36 |
David Wang | Conditioning Station | Standard Operation | TM2 | UCX33# | TM2 leak check at TCS |
Leak checked TM2 service cap at TCS. helium pressure checked containment box window and HS cooling lines. No leak on service cap and waterlines. |
|
2227
|
Thursday, June 10, 2021, 14:54 |
David Wang | North Hot-Cell | Standard Operation | TM2 | UCX33 | UCX 33 on TM2 electical check at NHC. |
TM2 UCX33# electrical check and leak check results. See attachment. |
| Attachment 1: UCX33_TM2_electrical_check.pdf
|
|
|
2226
|
Wednesday, June 09, 2021, 10:48 |
David Wang | South Hot-Cell | Standard Operation | TM2 | | TM2 containment box leak check. |
Chad installed containment box back to TM2 yesterday. We leak checked VCR joints on window line. No leak. |
|
2225
|
Wednesday, June 09, 2021, 10:15 |
David Wang | ITE/ITW | Standard Operation | TM4 | UCX33. | ITE water signal interlock check. |
Annual ITE water signal interlock check is done. HS, TAR, TUBE, MSP, EE, COIL 1, containment box window, HVC1, HVC2, 2A window, 2A shielding plug, 2A dump, 2A collimator, and 2A tank water signal interlock are checked. Everything is working properly.
2021-06-22. Annual ITW water signal interlock check is done, HS, TAR, MSP, EE, COIL1 , containment box window, HVC1 , HVC2, 2A window, 2A shielding plug, 2A dump, 2A collimator, and 2A tank water signal interlock are checked. Everything works fine. |
|
2224
|
Wednesday, June 09, 2021, 09:16 |
Travis Cave | North Hot-Cell | Standard Operation | TM2 | no target | Module move |
TM#2 has been moved from the SHC to the NHC. |
|
2223
|
Thursday, June 03, 2021, 08:33 |
David Wang | South Hot-Cell | Standard Operation | TM4 | UCX32# P2N | P2N UCX 32 on TM4 electical check and leak check at SHC. |
Both electrical check and leak check (HS and Window lines)results are good. See attachments
Correction: It should be UCx#32 P2N instead of UCx33# in check list attached . UCx#33 is on TM2 in ITW |
| Attachment 1: P2N_UCX33#_target_electrical_chek_at_SHC_2021_0601.pdf
|
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|
2222
|
Thursday, June 03, 2021, 08:20 |
David Wang | South Hot-Cell | Standard Operation | TM2 | | Remotely remove TM2 from silo to shc |
Remotely removed Tm2 from silo to SHC. The moving is smooth. |
|
2221
|
Thursday, June 03, 2021, 08:19 |
David Wang | ITE | Repair | TM4 | UCX33 | Replaced ITE TP4 |
Replaced ITE TP4 due to failure start. The new pump works fine. |
|
2220
|
Monday, May 31, 2021, 11:28 |
David Wang | ITE | Standard Operation | TM4 | | Remotely remove TM4 from silo to shc |
Remotely remove tm4 from silo to shc. The moving is smooth. |
|
2219
|
Tuesday, May 25, 2021, 16:20 |
Anders Mjos | Conditioning Station | Maintenance | | | TK2 refilled |
Tank refilled from 12 in to 25 in using the new valve. |
|
2218
|
Tuesday, May 25, 2021, 16:20 |
Anders Mjos | Conditioning Station | Maintenance | | | Chiller maintenance |
A contractor on site today for chiller maintenance. CP2 and CP3 circuit is leaking and shall not be used. CP1 can still be used. The contractor will contact Plant Group with a quote for repair and upgrades. |