Scope of Work:To remove 12kV DC high voltage input to the Cyclotron RF system.
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 1
Second Person Requirement
Not Required
Second Person Identified
N/A
Other Participants
N/A
Affected Persons Notified
Yes
System / Equipment
Switching
Non-Hazardous Switching
Panel / Equipment ID
GE21
System Information Review
☑ Single Line Drawing ☑ 12kV HVDC Isolation Equipment Specific LOTO R5D-1
Control of Hazardous Energy
Simple LOTO
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
1.1 Review this procedure.
1.2 Perform briefing to all LOTO Affected Persons.
1.3 Notify Operator-In-Charge (OIC) of intent to apply 12kV HVDC Isolation LOTO.
2. Equipment Shutdown:
2.1 Verify voltage is present on the Modulator input voltage meter (F328).
2.2 Have the control room operator perform a normal shutdown of the 12kV AC Breaker (A2318).
2.3 Verify the corresponding power-on lights have gone to the off state (A2318).
2.4 Verify the Modulator input voltage meter has gone to zero (F328).
2.5 Remove Admin lock and open GE50 cabinet west door (PAD).
2.6 Open Ross relay coil power circuit breaker GE50-CB1 (120VAC).
2.7 Close GE50 cabinet west door, replace Admin lock.
2.8 Verify GE21 Ross relay contact is in the OFF position (GE21 south window).
GE21-HV Switch: Switch to OFF position, apply LOTO device, place LOTO Key#1 into Group LOTO Box.
Visually verify 2 Modulator grounding relays (north wall) are in the down (grounded) position.
Control of Work Area
Minimum Approach Boundary
N/A
Barricade Tape / Attendant
Shock Risk Assessment
System Voltage
No Shock Hazard Present
Limited Approach Boundary
None
Restricted Approach Boundary
None
Will the hands enter the RAB
No
Voltage Glove Class
Not Required
Will any other part of the body enter the RAB
No
Arc Flash Risk Assessment
Incident Energy
N/A cal/cm2
Arc Flash Boundary
N/A
Working Distance
No Arc Flash Hazard Present
Arc Flash PPE Level
Minimum PPE for Electrical Work
Incident Energy Reduction Measures
Not Required
Capacitor Hazards
Capacitor Bus Voltage
N/A
Capacitor Total Stored Energy (Joules)
N/A
Discharge Wait Time (Minutes)
N/A
Emergency Response Plan
Nearest Landline Location
20' to the South.
Emergency Number to Call
911
Sufficient Cell Phone Signal
Yes
Clear Exit Path
Yes
AED Location
88" EM shop and front entrance to Building 88
Fire Extinguisher Location
30' to the South.
Contact Release Method Available and Tested
None needed.
Environmental Conditions
Does the environment present additional hazards that should be addressed?
If at night, will need a flashlight. If raining, can walking surface can be slippery.
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 ☑
Notes / Other
Requirements: One worker trained in non-QEW switching (EHS0536), LBNL LOTO (EHS0370/EHS0373), 88” LOTO (88-OPS-PRO-17) 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)
