Time / Date: 8/28/2024 9:08:00
JSP ID: 2884
Scope of Work: Open Gyrotron cabinet and remove Magnet power Supply for inspection and repair.
Work Order: N\A
Building: 88
Person in Charge: Brendan Ford
Lead / Supervisor: Other
Logged Email: bpford@lbl.gov
Division: Other
QEW Level: QEW 2
Modes of Work: Mode 0 - Electrically Safe Work Condition, Mode 1 - LOTO & Zero Voltage Verification
Second Person Requirement: Standby Person
Second Person Identified: Nathaniel Bohm
List Other Participants: Scott Small, John Garcia, Sean Zhong, Nathaniel Bohm
Affected Persons Notified: Yes
Switching: Hazardous Switching
Panel / Equipment ID: CB 15 in panel 80A4A6A
System Information Review: Single Line Drawing, Panel Schedules, Arc Flash Labels
Control of Hazardous Energy: Simple LOTO
Equipment Condition: Properly installed, Properly maintained, All doors and covers closed and fully latched, 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:Make sure Gyrotron owner/users is notified and shutdown Gyrotron. 2:Switch CB 15 in panel 80A4A6A, 480 VAC with Arc Flash Hazard of 5.30 cal. 3:Apply Loto lock and tag on CB 15 and verify absence of voltage on TB 2 inside rear north side of Gyrotron enclosure. 4:Cover High Voltage Power Supply output leads just below Magnet power Supply and small access hole just to the right with rubber insulating blankets for the duration of the work. 5:Remove all connections to the Magnet power Supply and remove from enclosure. 6:Repair/replace Magnet power Supply. Remove rubber insulating blankets and close enclosure. 7:Remove Loto locks and switch CB 15 on and return control to Gyrotron owner/users after functional tests are complete.

Control of Work Area

Minimum Approach Boundary: 42"
Barricade Tape / Attendant: Caution - Yellow

Shock Risk Assessment

System Voltage: 277/480 V ac
Limited Approach Boundary: 42 inches
Restricted Approach Boundary: 12 inches
Will the hands enter the RAB: Yes
Voltage Glove Class: 0
Will any other part of the body enter the RAB: No

Arc Flash Risk Assessment

Incident Energy: 5.3 cal/cm2
Arc Flash Boundary: 41"
Working Distance: 18 inches
Arc Flash PPE Level: 2
Incident Energy Reduction Measures: 0

Capacitor Hazards

Capacitor Bus Voltage:
Capacitor total stored energy (joules):
Discharge wait time (minutes):

Emergency Response Plan

Nearest Landline Location: Less then 15' away just east of panel.
Emergency Number to Call: 911
Sufficient cell phone signal? Yes
Clear exit path? No
AED Location: E.M. shop and also inside front main entrance of the building.
Fire Extinguisher Location: 45' to the South East, on walkway above stairs.
Contact release method available and tested: Rescue hook, Voltage gloves

Environmental Conditions

Does the environment present additional hazards that should be addressed?

None

Error Precursors

Task Demands:
Work Environment:
Individual Capabilities:
Human Nature:
Error Precursor Mitigations:

Slow down and perform the work in a thoughtful manner.

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,
Multimeter and other electrical test instruments

Notes / Other

Perform Job Breifing

PIC Conducts the Job Briefing. Cover all the contents of the Job Safety Plan.

A Job Briefing at a minimum must include:
  1. Detailed Scope of Work
  2. Shock and arc flash hazards for each task
  3. Controls to mitigate the hazards (procedures, precautions, energy source controls, PPE requirements)
  4. Work area controls (barricades, signs, attendants)
  5. Emergency Response Plan

Rev 2023.08.22.1
Form Content and Feedback Contact: Michael Rose -- mvr@lbl.gov