AMRE Safety Seminar 24 April 2014

Electrical incidents, Remedial actions and Safety initiatives within Sibanye Gold

By: Ben PotgieterSenior Manager Electrical

Agenda

• Who is Sibanye Gold

• Safety stats

• Strategy and campaign

• Brief review of incidents

• Remedial and corrective actions

• New initiatives

• Conclusion

Resent acquisitionsCook ComplexWits Gold

Overview

Witwatersrand Basin

4Historic production : Gold >1 600 000 000oz and Uranium, > 570 000 000lbs

Safety not on my mind

1

10

30

600

116

19

33

3806

19

34

59

18547

Focus and management of the “potential incidents” at the base, reduces the likelihood of more severe loss events

Fatal Injury

Serious Injury

Lost Time Injury

Potential Incident“Identified & Rectified”

Bird’s Triangle Sibanye ‐ 2012 Sibanye ‐ 2013

Focus on incidents will reduce Fatal and Serious accidents

Safety strategy

7

Our jobs as Engineers is mainly about:

• Compliance• Engineering out of the Risk

Electrical incidents affecting employees

2010 2011 2012 2013 2014Fatal 0 0 1 0 0Incidents 1 0 3 3 2People affected 1 0 3 4 13

02468

101214

Fatal Incidents People affected

Electrical incidents are common regular occurrences however those that affect employees is rare.In Most cases the Electrical protection saves the day

Cable Theft Poster

Working on Energy sources

Fundamental principal working with Electricity sources

Fatal Electrocution from Live PT

12

HIGH POTENTIAL ACCIDENT DESCRIPTIONS -

Description: (What, when, where, how)

Electrician was fatally electrocuted when he came into contact with obscured live PT connections

Root cause:

PT installed in cable compartment and fed from Bus bars

Corrective Action Taken:

Install PT on Buss bar compartment

Preventative Action Taken: (action taken to stop this type of incident from happening again)

• Ensure visibility of all live parts in a breaker• Audit all switchgear to engineer out similar

installation• Implemented SURETECH personal alerts

DetailsALL people can now SEE whether electrical equipment is live or dead

• Use on any voltage from 110Vac to 760kVac

• The Personal Alert is worn on the wrist like a watch, fastened with Velcro straps, OR mounted on

telescopic link stick with

standard crown adapter

• No user controls, automatically switches ON or OFF, entering or leaving the electric field

• Buzzers beep and ultra bright LED flashes at a rate that increases from 0.7Hz when approaching live

equipment, to

20Hz near live conductor

• Filters for corona, partial discharge and electrical noise make the HV/PA stable under wide range of

electrical noise

• Types available:

• H – High skill, higher voltages (white)

• M – medium skill, med voltages (grey)

• L – Low skill, lower voltages (black)

Operating Characteristics

Video clip on SURETECH personal voltage alert

ARC flash incident Beatrix

16

HIGH POTENTIAL ACCIDENT DESCRIPTIONS -

Description: (What, when, where, how)

Electrician was exposed to an ARC flash when he withdrew a MV breaker that was still supplying load to a faulty transformer

Root cause:

Breaker failed to trip – Breaker stickySome of the breakers have not been maintained

Corrective Action Taken:

Servicing of all BreakersSwitching done under supervisionInstall cable live indicatorsInstall remote open close

Preventative Action Taken: (action taken to stop this type of incident from happening again)

Install mechanical interlock to prevent withdrawal of breaker if not fully open

Roll out new type of Arc clothing to the group

Spring Charge + On / Off Indicator

(indicates partial operation of breaker)

Failed Breaker

Damage to electricians

flash suit

Video clip on Arc Clothing - Nomex,Protera

Arc Clothing we issueSingle piece ATPV 12.4 cal/cm²Two piece ATPV 12.4 cal / cm² ATPV 10.2 cal / cm² ATPV 12 cal / cm²

Two-piece arc flash suit excluding hood ATPV 51 cal / cm²

Balaclava and Goggle energy kitATPV 45.8 cal / cm²

Balaclava and Goggle energy kitATPV 45.8 cal / cm²

Every Day use itemsEvery Day use items

For Phasing and Switching operations

Single piece ATPV 12.4 cal/cm²Two piece ATPV 12.4 cal / cm² ATPV 10.2 cal / cm² ATPV 12 cal / cm²

Two-piece arc flash suit excluding hood ATPV 51 cal / cm²

Balaclava and Goggle energy kitATPV 45.8 cal / cm²

Every Day use items

For Phasing and Switching operations

Clothing Supplied by: A J Charnaud & Co. (Pty) Ltd.

Characteristics:

• Guaranteed Flame Resistance• Shrinkage Control• Fabric Softness

Tested up to 200 washes

Fabric switching gloves -380mm longATPV 51 cal / cm²

Mini Sub Protection

Kloof 8# Driefontein4#

Internal Arc Protection advancement UFES system

Driefontein 9# what we want to prevent

Other initiatives• Revision of Group Electrical COP and associated Standards for:

• Supply of Equipment standards (Transformers, Switchgear, Motors, Cables Etc• Repair of Equipment standards• Installation and operating standards

• More frequent transformer oil testing • Aging transformers• On degradation of oil on previous tests

• Improving transformer protection requirements

• Switchgear maintenance to increase in line with application and operations

• Thermal imaging scans for Hot connections being doing now for a number of Years

• Color coding of Reticulation drawings is very useful on busy drawings

• Energy Efficiency has high weighting currently looking at Photo Voltaic generation opportunities

Burning transformer

Questions

One-Axis-Horizontal TrackerFor our Future Energy needs