Scope of Work:To produce an electrically safe condition to perform electrical maintenance on the Final Power Amplifier.
General Information
Work Order
N/A
Building
88
Person in Charge
Brendan Ford
Lead / Supervisor
Other
Logged Email
bpford@lbl.gov
Division
Other
Work Planning
Modes of Work
☑ Mode 0 - Electrically Safe Work Condition ☑ Mode 1 - LOTO & Zero Voltage Verification
QEW Level
QEW 2
Second Person Requirement
Standby Person
Second Person Identified
Other Participants
Affected Persons Notified
Yes
System / Equipment
Switching
Hazardous Switching
Panel / Equipment ID
DE165
System Information Review
☑ Single Line Drawing ☑ Final Power Amplifier Equipment Specific LOTO R5G-1
Control of Hazardous Energy
Complex LOTO w/ RI
Equipment Condition
☑ Properly installed ☑ Properly maintained ☑ All doors and covers closed and fully latched ☑ No signs of impending failure ☑ Not energizing equipment for the first time ☑ or after electrical repair
Sequence of Job Steps
List basic sequence of steps from start to finish
- Perform briefing to all LOTO Affected Persons.
-Notify Operator-In-Charge (OIC) of intent to apply FPA LOTO.
-Equipment Shutdown:
-Have the control room operator perform a normal shutdown of the FPA, wait 20 minutes for capacitor discharge time before proceeding.
-Turn off 24V DC power at A3036-P[2]-9.
-12kV DC. Cyclotron HV DC. Control With: 12KVDC (R5D-1) or 12KVAC (R5D-2) LOTO.
-480V AC. FPA Filament Power. FPA PG1 Plug. Control With: 80A3A6A-CB4
-3kV DC, 1.5A. Screen Grid Bias HVPS. Turn On Test. Control With: A1019 Power Plug
-2.4kW RF .01-225 MHz FPA Driver Amplifiers. Turn On Test. Control With: 240V Input Plug to A1000/A1200 Amplifier Remove plug.
-3.5 600V DC, 1.A. Grid Bias HVPS. Control With: A3120-CB3 (240V, 15A, 9.25 cal/cm2)
-3.6 409J at 15.6V (6x 0.56mF)
FPA Filament Rectifier Cap. Bank. Control With: Engineered Control - wait 20 minutes before opening FPA Cabinet (time to less than 10 joules)
-Turn off and blow down water lines, as needed. Anode (Main manifold in Pit.) Anode Ring (Main manifold in Pit.)
-Attempt to turn-on the FPA.
Every area of LOTO has a fire extinguisher very close
Contact Release Method Available and Tested
Rescue hook, Voltage gloves
Environmental Conditions
Does the environment present additional hazards that should be addressed?
Insufficient lighting
Error Precursors
Task Demands
Work Environment
Individual Capabilities
Human Nature
Error Precursor Mitigations
N/A
PPE Inspections
☑ Safety glasses (ANSI Z87) ☑ Arc-rated clothing (flash suit ☑ daily wear) including face shield ☑ balaclava ☑ hood. ☑ Hearing protection ☑ Rubber insulating gloves and leather protectors ☑ Non-melting footwear that fully covers the feet ☑ Removal of conductive articles ☑ Insulated tools ☑ Multimeter and other electrical test instruments ☑ Inspect rescue hook for damage and test date.
Notes / Other
Requirements: One qualified electrical worker (QEW2) trained for testing and switching, trained in capacitor safety, trained in LBNL LOTO, trained in 88” specific LOTO (88-OPS-PRO-017) and authorized.
Perform Job Briefing
PIC Conducts the Job Briefing. Cover all the contents of the Job Safety Plan.
A Job Briefing at a minimum must include:
Detailed Scope of Work
Shock and arc flash hazards for each task
Controls to mitigate the hazards (procedures, precautions, energy source controls, PPE requirements)
Work area controls (barricades, signs, attendants)
