QEW 1 / 2 / 3 Job Safety Plan

Time / Date: 3/21/2025 14:52:31

JSP ID: 3530

Scope of Work: Troubleshoot VFD alarms in CDUs D100 and D101

Work Order: NA

Building: B59

Person in Charge: Ernie Jew

Lead / Supervisor: Grounds, Jeff

Logged Email: ejew@lbl.gov

Division: Comp Sci

QEW Level: QEW 2

Modes of Work: Mode 0 - Electrically Safe Work Condition, Mode 1 - LOTO & Zero Voltage Verification, Mode 2 - Energized Diagnostics, Testing and Troubleshooting, Visual Inspection

Second Person Requirement: Standby Person

Second Person Identified: Eric Lucas

List Other Participants: HPE site engineers (Vendor)

Affected Persons Notified: Yes

Switching: Non-Hazardous Switching

Panel / Equipment ID: 692A4A & 628A7A

System Information Review: Panel Schedules, Arc Flash Labels

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

List basic sequence of steps from start to finish.

Notify Control Room of work on CDU D100 Set up barricade around CDU D100 Switch power off to CDU D100 (628A7A-40 & 692A4A-40) Hang Group LOTO lock and tag at 628A7A-40 and place key in LOTO lock box Hang Group LOTO lock and tag at 692A4A-40 and place key in LOTO lock box Hang RI lock and tag on lock box ZVV at VFD cabinet at CDU D100 Brief HPE/Cray workers and have them hang LOTO lock and tag on lock box Get QEW to cover CDU with 600 volt sheeting with cutout for the two VFD displays Release LOTO and perform partial power restoration Scroll through VFD to troubleshoot CDU D100 alarm When troubleshooting is complete, switch power off to CDU D100 (628A7A-40 and 692A4A-40) Hang Group LOTO lock and tag at 628A7A-40 and place key in LOTO lock box Hang Group LOTO lock and tag at 692A4A-40 and place key in LOTO lock box Hang RI lock and tag on lock box ZVV at VFD cabinet at CDU D100 Remove 600 volt sheeting and close CDU D100 enclosure door When work is complete - Notify Control Room that power will be restored to CDU D100 Release LOTO and switch power on to CDU D100 Remove Barricades Work is complete

Minimum Approach Boundary: 42"

Barricade Tape / Attendant: Warning - Orange

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

Incident Energy: 1.24 cal/cm2

Arc Flash Boundary: 18"

Working Distance: 18 inches

Arc Flash PPE Level: 1

Incident Energy Reduction Measures: 0

Capacitor Bus Voltage: NA

Capacitor total stored energy (joules): NA

Discharge wait time (minutes): NA

Does the environment present additional hazards that should be addressed?

Lookalike equipment

Task Demands:

Work Environment:

Individual Capabilities:

Human Nature:

Error Precursor Mitigations:

verify equipment worked on is identified and agreed on with stand by person for lookalike eqipment

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

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

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