| # | Status: | Implemented by: | System: | Interlock: | Description: |
|---|---|---|---|---|---|
| 2024-235 Implemented on: 2024-05-07 | Active | Ryan Anderson In consultation with: , | RF | Quadrant 1 Sw2 and Sw3 signals ... Quadrant 1 Sw2 and Sw3 signals bypassed for resonator latching unit | Signal bypassed for latching u ... Signal bypassed for latching unit to work and to provide "resonators latched" signal to enable RF for beam. Originally discovered in Fault 16902, addressed under C2024-05-03-2, future work required. |
| 2024-229 Implemented on: 2024-05-06 | Active | Ryan Lovelidge In consultation with: , | Targets | STF reservoir level transducer STF reservoir level transducer | STF reservoir level transducer ... STF reservoir level transducer is failing, pinned at BYP-011 in the STF bypass rack. Duration is until it is fixed or replaced. |
| 2024-191 Implemented on: 2024-04-19 | Active | Ryan Lovelidge In consultation with: , | Targets | BL2C4 STF Supply Resistivity BL2C4 STF Supply Resistivity | STF Supply Resistivity reads " ... STF Supply Resistivity reads "PLCDat" error causing cyclotron trip. This is a known problem; see Fault 13917. This signal should be used as a diagnostic readback only, and not as an interlock.
*Do not remove this defeat until supply resistivity signal has been removed as a BL2C4 interlock. |
| 2024-69 Implemented on: 2024-01-31 | Active | Brandon Humphries In consultation with: , | Ion sources and injection BL | EGUN BIAS Voltage Auto-Ramp ut ... EGUN BIAS Voltage Auto-Ramp utility Max current limit | At the end of the year in 2023 ... At the end of the year in 2023 while beam was sending to EGUN:FC1, the EGUN:BIAS current read-back (EGUN:BIAS:RDCUR) made a significant jump up to ~1 mA. Since then, this is the normal level the EGUN:BIAS current reaches when ramped up. Because of this EGUN:BIAS current reading increase, the ramping utility wouldn't reach all the way up to 300 kV. The ramping utility needed to have it's Max current limit increased from 1 mA to 1.2 mA. This limit increase was implemented on Tuesday January 30 (WP#A2024-01-30-2). This defeat will be removed once the origin of this EGUN:BIAS current jump is discovered and resolved (being tracked in the issue tracker). |
| 2023-671 Implemented on: 2023-12-23 | Active | Eric Chapman In consultation with: , | Services | MAB cooling towers, numerous c ... MAB cooling towers, numerous cells switched off, low cooling demand | Low cooling demand, accelerato ... Low cooling demand, accelerators offline for shutdown. Allow for regulation of system temperatures. |
| 2023-668 Implemented on: 2023-12-22 | Active | Chris Sooley In consultation with: Chris Sooley, Jas Uppal | Services | Al-ALCW Heat Exchangers Valves ... Al-ALCW Heat Exchangers Valves H-18 closed and D-17 throttled | MM and RF off for shutdown. MM and RF off for shutdown. |
| 2023-638 Implemented on: 2023-12-04 | Active | Gauhar Hayat In consultation with: Ryan Lovelidge, | Targets | T2CS:FGTGT TRIP LOW lowered fr ... T2CS:FGTGT TRIP LOW lowered from 2.8 GPM to 2.5 GPM. | Lowered on suggestion by Alber ... Lowered on suggestion by Albert from Remote Handling. Value is stable, but at threshold currently. |
| 2023-621 Implemented on: 2023-11-23 | Active | Eric Chapman In consultation with: , | Ion sources and injection BL | ISIS beam loss trip level lowe ... ISIS beam loss trip level lowered to 10uA | Losses reading up to -10uA aft ... Losses reading up to -10uA after vacuum improvements in ISIS. IB 461 trip threshold (ISIS beamloss) lowered from nominal of 20uA to 10uA at request of Yuri Bylinsky as a precautionary measure until losses can be recalibrated. |
| 2023-447 Implemented on: 2023-08-04 | Active | Riley Schick-Martin In consultation with: , | Optics | BL2A Q9, Q12, Q15, B3, B4 flow ... BL2A Q9, Q12, Q15, B3, B4 flow switch interlock limits | Less flow through magnet circu ... Less flow through magnet circuit since pumps tripped in power bump. |
| 2023-275 Implemented on: 2023-05-26 | Active | Travis Kurucz In consultation with: Riley Schick-Martin, | Safety | Gas Monitor 2 Bypassed Gas Monitor 2 Bypassed | Monitor was a summary readback ... Monitor was a summary readback for the superconducting solenoid in M9B that has been physically removed, and tripped when a wire was pulled. Pinned at Doug Preddy's advisement. |
| 2023-258 Implemented on: 2023-05-16 | Active | Eric Chapman In consultation with: , | Targets | 2C Beam Stop TC 2C Beam Stop TC | Temperature readback is noisy. Temperature readback is noisy. |
| 2023-255 Implemented on: 2023-05-11 | Active | Eric Chapman In consultation with: , | Targets | BL1A T1 target flow trip and w ... BL1A T1 target flow trip and warn | T1 target flows running a bit ... T1 target flows running a bit low despite MRO over maintenance. Warning and trip limits lowered ~10% to avoid nuisance trips/messages. OK'd with Adam Newsome. |
| 2023-146 Implemented on: 2023-03-18 | Active | Eric Chapman In consultation with: , | Other / Misc | 2C7 faraday cup water flow byp ... 2C7 faraday cup water flow bypassed | 2C7 water flow interlock bypas ... 2C7 water flow interlock bypassed since May 25 2015. Flow read back poor with current configuration, flow meter requires upgrade. Discussed with Steve Sapriken and bypass is still valid. |
| 2023-103 Implemented on: 2023-02-14 | Active | Brandon Humphries In consultation with: , | Vacuum | EHDT:IMG6 interlocks bypassed EHDT:IMG6 interlocks bypassed | The vacuum in the EHDT:DB6B va ... The vacuum in the EHDT:DB6B vacuum section is too good with EHDT:IP6 and EHDT:NP6 running for EHDT:IMG6 to read. So IP6 is turned off and the EHDT:IMG6 interlocks are bypassed to allow it to run. |
| 2022-218 Implemented on: 2022-08-03 | Active | Eric Chapman In consultation with: , | Targets | 2A2DSP-TC1 shield plug water t ... 2A2DSP-TC1 shield plug water temp bypassed | Shield plug water temp signal ... Shield plug water temp signal noisy tripping beam. Not real |
| 2022-147 Implemented on: 2022-05-31 | Active | Jason Wait In consultation with: , | Safety | Air Monitor #5 "ISAC Total Sta ... Air Monitor #5 "ISAC Total Stack Exhaust AlphaTEL1" CSS signal defeated (Pinned in Rack A in DCR) | Air Monitor #5 "ISAC Total Sta ... Air Monitor #5 "ISAC Total Stack Exhaust AlphaTEL1" signal has been moved to Air Monitor #32 "spare" until further notice. |
| 2022-90 Implemented on: 2022-04-26 | Active | Riley Schick-Martin In consultation with: , | Services | Gas monitor 13 ( Breathable Ai ... Gas monitor 13 ( Breathable Air 1, SAB1) | Monox detector requires servic ... Monox detector requires servicing. |
| 2021-381 Implemented on: 2021-11-16 | Active | Kyle Mollard In consultation with: , | Safety | Air Monitor #17 - ISAC B2 Air ... Air Monitor #17 - ISAC B2 Air Sampling Rm 4 bkgrnd | False alarms despite attempts ... False alarms despite attempts of repair by Safety Systems Group. Defeat approved by J.Mildenberger until 2022.
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| 2021-377 Implemented on: 2021-11-12 | Active | Dale Nagra In consultation with: , | Other / Misc | STF PLC bypass 034/035 STF PLC bypass 034/035 | STF stack valve removed from w ... STF stack valve removed from water package. Note: 034/035 are the limit switches for the stack valve. |
| 2021-314 Implemented on: 2021-09-19 | Active | Eric Chapman In consultation with: , | Targets | 2A3COL-TC2 2A3COL-TC2 | 2A3COL-TC2 readback suddenly d ... 2A3COL-TC2 readback suddenly dropped to -95C at 08:39 15 Sept 2021. TC2 bypassed for this run. |
| 2021-220 Implemented on: 2021-06-24 | Active | Micheal Donohoe In consultation with: , | RF | LESW Spill TC #1 (RF,322) LESW Spill TC #1 (RF,322) | Noisy readback causing beam to ... Noisy readback causing beam to trip. |
| 2021-203 Implemented on: 2021-06-15 | Active | Riley Schick-Martin In consultation with: , | Targets | 2A3COL-TC3 2A3COL-TC3 | TC is reading -95 deg. Defeat ... TC is reading -95 deg. Defeat approved by Alex Gottberg. |
| 2021-179 Implemented on: 2021-05-28 | Active | Brandon Humphries In consultation with: , | Optics | EHDT:Q6 removed from MPS Optic ... EHDT:Q6 removed from MPS Optics OK summary | EHDT:Q6 should not be used for ... EHDT:Q6 should not be used for the upcoming beam time to allow for using the last three BPMs up to EHD for beam position interlock. This device was already degaussed then locked out (2021-134), this defeat will allow for satisfying the MPS Optics OK summary (would usually fail if device wasn't on). |
| 2021-169 Implemented on: 2021-05-25 | Active | Dale Nagra In consultation with: Eric Chapman, | Ion sources and injection BL | Skimmer #1 "B" side cable grou ... Skimmer #1 "B" side cable grounded | Skimmer #1 trip at 5am. With ... Skimmer #1 trip at 5am. With beam and optics off in skimmer #1 section still in alarm. |
| 2021-116 Implemented on: 2021-04-14 | Active | Elena Bylinskaia In consultation with: Elena Bylinskaia, | Safety | IBOP I1416 pinned IBOP I1416 pinned | BL 1U BB locked out for 1U exc ... BL 1U BB locked out for 1U exclusion area reconfiguration. IBOP I1416 pinned to allow 1A operation. |
| 2020-58 Implemented on: 2020-11-27 | Active | Jason Wait In consultation with: , | RF | ILRF,617 "DEE gap water W out ... ILRF,617 "DEE gap water W out TC T/C OVERTEMP (RF,513) | Defeated until resolved - Nois ... Defeated until resolved - Noisy read-back is causing RF trips. *Do not retire this defeat until Fault Report 13317 is resolved. If ILRF 617 is found back on scan, disable it again. Fault is intermittent and will trip again. See defeats 8507 and 8805 |
| 2020-52 Implemented on: 2020-06-03 | Active | Jason Wait In consultation with: , | Safety | EHD:TS03 alarm signal EHD:TS03 alarm signal | Until TS03 is repaired - TS03 ... Until TS03 is repaired - TS03 is fount to be faulty and is causing unnecessary alarms |
| 2020-42 Implemented on: 2020-10-12 | Active | Jason Wait In consultation with: , | Optics | 1AQ13 Flow meter trip limit re ... 1AQ13 Flow meter trip limit reduced from "4 to 4.5 GPM" to "3 to 3.5 GPM" | 1AQ13 flow meter trip point re ... 1AQ13 flow meter trip point reduced from 4-4.5GPM to 3-3.5GPM - Water flow to magnet is below previous trip limit |
| 2020-36 Implemented on: 2020-06-08 | Active | Jason Wait In consultation with: , | Safety | Neutron Monitor #11 Warn limit ... Neutron Monitor #11 Warn limit lowered to 10 uS from 30 uS | Neutron Monitor #11 warn limit ... Neutron Monitor #11 warn limit changed from 30 uS to 10 uS until ongoing M9 work is completed, while 1B is planned to receive beam. From paper defeat: "This change makes it safer, no protection is being removed or defeated" |
| 2020-35 Implemented on: 2020-04-20 | Active | Jas Uppal In consultation with: , | Ion sources and injection BL | ISIS Skimmer-4 cable #61-0853 ISIS Skimmer-4 cable #61-0853 | Section alarming with no beam ... Section alarming with no beam on it. |
| 2019-56 Implemented on: 2019-11-13 | Active | Micheal Donohoe In consultation with: , | Safety | Gas Monitor #17 Gas Monitor #17 | Work has started for implement ... Work has started for implementing Gas Monitor #17, an O2 deficiency monitor for TEM MOB149. |
| 2019-53 Implemented on: 2019-09-19 | Active | Jas Uppal In consultation with: , | Targets | 2A2COL-TC2 Collimator Plate Te ... 2A2COL-TC2 Collimator Plate Temp | TC reading 304C. TC reading 304C. |
| 2019-52 Implemented on: 2019-09-02 | Active | Micheal Donohoe In consultation with: , | Optics | 1AQ15 Water Flow Trip Limit In ... 1AQ15 Water Flow Trip Limit Increased | P/S tripping on mag flow. P/S tripping on mag flow. |
| 2019-50 Implemented on: 2019-07-31 | Active | Micheal Donohoe In consultation with: , | Targets | (U+D)/Total trip limit increas ... (U+D)/Total trip limit increased | No reason given on defeat form ... No reason given on defeat form. Reason given on defeat yellow tag: Wrong calculation on new electronics for 1AT1 protect. |
| 2019-48 Implemented on: 2019-04-18 | Active | Micheal Donohoe In consultation with: , | Optics | 2C4VSM2 Mag OK interlock 2C4VSM2 Mag OK interlock | Magnet thermal switch most lik ... Magnet thermal switch most likely faulty. Issue occurred in Nov/18 and thought repaired. |
| 2019-47 Implemented on: 2019-04-18 | Active | Jas Uppal In consultation with: , | Optics | M9 Q1 and Q2 (as shielding) M9 Q1 and Q2 (as shielding) | Until M9 Q1 and Q2 are reinsta ... Until M9 Q1 and Q2 are reinstalled. There are 2 steel shielding blocks in place of Q1 and Q2 to shield the downstream area. |
| 2018-783 Implemented on: 2018-10-25 | Active | Jas Uppal In consultation with: , | Other / Misc | LESW spill #2 thermocouple (RF ... LESW spill #2 thermocouple (RF,321) | Erratic temperature readings w ... Erratic temperature readings were causing cyclotron trips. |
| 2018-782 Implemented on: 2018-10-16 | Active | Jas Uppal In consultation with: , | Optics | 1BVB2 Mag Temp interlock bypas ... 1BVB2 Mag Temp interlock bypassed | Temp interlock faulty Temp interlock faulty |
| 2018-780 Implemented on: 2018-07-26 | Active | Jas Uppal In consultation with: , | Targets | BL2A2 and 2A3 Dump trip limits ... BL2A2 and 2A3 Dump trip limits adjusted | Values too low for normal oper ... Values too low for normal operation. |
| 2018-778 Implemented on: 2018-04-20 | Active | Jas Uppal In consultation with: , | Other / Misc | IL2C 7,8 2C wall trip and warn ... IL2C 7,8 2C wall trip and warn temperature | To facilitate higher currents ... To facilitate higher currents down 2C4 |
| 2017-6 Implemented on: 2017-04-13 | Active | Jason Wait In consultation with: , | Vacuum | Lower Alarm limit in EHDT:IM66 ... Lower Alarm limit in EHDT:IM66 | EHDT:IM66 is reading close to ... EHDT:IM66 is reading close to the lower alarm limit (1 e^-10 Torr) and is causing nuisance alarms |
| 2017-2 Implemented on: 2017-08-22 | Active | Micheal Donohoe In consultation with: , | Optics | 1AQ15 ground current detection ... 1AQ15 ground current detection circuit bypassed | Ground currents in 1AQ15 are l ... Ground currents in 1AQ15 are low. With 1AQ15 current at ~750A, ground current is approximately 4A. |
| 2017-1 Implemented on: 2017-06-30 | Active | Micheal Donohoe In consultation with: , | Ion sources and injection BL | ISIS SK-1 Cable #610817 ISIS SK-1 Cable #610817 | SKIMMER section alarms with no ... SKIMMER section alarms with no beam on. |
| 2016-691 Implemented on: 2016-04-15 | Active | Jas Uppal In consultation with: , | Ion sources and injection BL | Skimmer #5 cable #61-0866 grou ... Skimmer #5 cable #61-0866 grounded | Cable was found to be faulty Cable was found to be faulty |
| 2016-690 Implemented on: 2016-11-01 | Active | Micheal Donohoe In consultation with: , | Targets | STF leak sensor STF leak sensor | Steve reports sensor is presen ... Steve reports sensor is presently NOT installed in nominal location and has possibly failed. |
| 2016-689 Implemented on: 2016-05-16 | Active | Micheal Donohoe In consultation with: , | Vacuum | BL1A TNF Vacuum BL1A TNF Vacuum | Vacuum at TNF jumped up. Vacuum at TNF jumped up. |
| 2015-3 Implemented on: 2015-08-04 | Active | Jas Uppal In consultation with: , | Vacuum | 1ACG3 trip value 1ACG3 trip value | Suspect 1A vacuum leak near T2 ... Suspect 1A vacuum leak near T2. |
| 2015-2 Implemented on: 2015-06-01 | Active | Jas Uppal In consultation with: , | Optics | M11 Septum TC #2 (TG304) M11 Septum TC #2 (TG304) | Noisy signal is causing trips. Noisy signal is causing trips. |
| 2015-1 Implemented on: 2015-05-29 | Active | Jas Uppal In consultation with: , | Optics | M11Q1 Magnet Overtemp M11Q1 Magnet Overtemp | Power supply is required to ru ... Power supply is required to run. |
| 2014-1 Implemented on: 2014-08-24 | Active | Jas Uppal In consultation with: , | Services | IBOP #1512: MESA Basement Rm01 ... IBOP #1512: MESA Basement Rm01A Airflow | Fume hood has not been operati ... Fume hood has not been operational in over 1 year. Fan is being removed. |
| 2013-1 Implemented on: 2013-05-10 | Active | Jas Uppal In consultation with: , | Ion sources and injection BL | Skimmer #2 cables:#61-0827, 61 ... Skimmer #2 cables:#61-0827, 61-0828, 61-0830 | Skimmer #2 plates discharging. Skimmer #2 plates discharging. |
| 2011-2 Implemented on: 2011-07-11 | Active | Jas Uppal In consultation with: , | Ion sources and injection BL | SK61-0869 Grounded SK61-0869 Grounded | Periodic signal found in cable ... Periodic signal found in cable/skimmer. |
| 2010-1 Implemented on: 2010-06-15 | Active | Kathleen Genge In consultation with: , | Targets | 2A2COL-TC3 2A2COL-TC3 | 80 C limit is too low for BL2A ... 80 C limit is too low for BL2A operation. Past defeats (May 23, 2007 #4371, Oct. 31, 2007 #4616 for 2A3COL). |
| 2007-1 Implemented on: 2007-10-10 | Active | Kathleen Genge In consultation with: , | Targets | 2A2DSP-TC3 2A2DSP-TC3 | 2A2DSP-TC3 hardware I/P defeat ... 2A2DSP-TC3 hardware I/P defeat pinned. |
| 1999-1 Implemented on: 1999-08-13 | Active | Kathleen Genge In consultation with: , | Targets | TNF collimator thermocouple A ... TNF collimator thermocouple A & B | Disabled TNF collimator A+B by ... Disabled TNF collimator A+B by shorting thermocouple circuits. Taken Col. temp off scan on Xscan Manager. |
| 1998-1 Implemented on: 1998-11-06 | Active | Kathleen Genge In consultation with: , | Diagnostics | LESW back-up spill monitor HV ... LESW back-up spill monitor HV ok signal to safety | HV ok signal to safety defeate ... HV ok signal to safety defeated; spill monitor is a spare |