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					     NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                             MINE SAFETY OPERATIONS



      UN ECE – Geneva, November 2007



         Electrical Ex Regulation in
                 NSW Mines

John Francis Waudby
Senior Inspector of Electrical Engineering
Mine Safety Operations
   NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                          MINE SAFETY OPERATIONS



                            Overview
Introduction – NSW Mines

Electrical equipment in mines

Regulation and the use of IEC Standards and
Schemes
NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                           MINE SAFETY OPERATIONS



                    Mining in NSW
                                 Coal
                                 Metalliferous
                                 Quarrying
                                 Sand Dredging
                                 Opals

                                 Fatality rate = 1/year
                                 LTIFR = 16 per million hours
                                 Last fatality 09/01/2007
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



                    Mining in NSW
Total (continuous + intermittent) = 1700
O/C Coal mines = 37
U/G Coal mines = 34
Coal production = 150,000,000 tonnes / annum
Coal U/G production = 50,000,000 tonnes /
annum
Coal employment = 13,000
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



    Role of the NSW Mining Regulator
Mine site assessments

Investigations

Standards & legislation development

Communication to all stakeholders

Industry support infrastructure
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



    Role of the NSW Mining Regulator
Strategic Plan

Standards & Legislation Program

Communication Program

Industry Infrastructure Support Program

Special Projects

Mine Safety Technology Centre
 NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                        MINE SAFETY OPERATIONS


   Electrical Engineering Safety

Prevention of gas and/or dust explosions

Prevention of electric shock and burns

Prevention of fires

Prevention of unintended operation of equipment

Provision of electrical safeguards
    NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                             MINE SAFETY OPERATIONS


Coal Mining – Electrical Engineering Safety
               Performance
 Last fatal accident                       23 years ago

 Last electrocution                        24 years ago

 Last fatal explosion                      28 years ago
    NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                           MINE SAFETY OPERATIONS


Coal Mining – Electrical Engineering Safety
               Performance
 Explosions / major gas ignitions

    8/1/1979 - West Wallsend

    24/7/1979 – Appin

    28/6/1995 - Endeavour

    12/12/1997 - Munmorah
NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                       MINE SAFETY OPERATIONS




   NSW Mining Regulator -
  Experience with Electrical
         Equipment
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



       Approval of Electrical Equipment

Explosion protected equipment

Electrically powered mobile machines for use U/G

Electrically powered mobile machines for use in O/C’s

Portable apparatus for use underground

Electrical protection relays for use underground
 NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                        MINE SAFETY OPERATIONS



      Approval of Electrical Equipment

Electrical protection relays for use in open cuts

Electric cables used in hazardous zones

Caplamps

Gas detectors

Electric shotfiring equipment (U/G & O/C)
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



       Approval of Electrical Equipment
Based on a test report from a recognised test lab

Reviewed by a competent engineer

Signed by the Chief Inspector of Coal Mines

Approval documents and number issued (no time limit)

Database kept
 NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                        MINE SAFETY OPERATIONS



   Approval of Electrical Equipment
Some approvals were issued with non - compliance
to standards

Approval was initially free

Conditions of manufacture / use were specified

Approval related to use & “pit worthiness”
NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                       MINE SAFETY OPERATIONS



     Approval of Electrical Equipment
It was as a result of serious accidents

One element in prescriptive technical regulation

It was based on published standards

Supported by competent mine electrical engineers

Supported by an approved workshops scheme
 NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                        MINE SAFETY OPERATIONS



     Approval of Electrical Equipment

Approval / competency schemes were credible

1988 – Risk assessment introduced to the coal
industry
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



               Evolution of approvals

1991 ALL approvals were subject to review

Hazardous zone cables were deemed to be approved

Approval scheme became stressed.

Other organisations appointed as “approvers”
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



               Evolution of approvals

Role of the regulator:

      quality auditor

      database manager

      ad-hoc technical review

By 1998 the approval scheme had deteriorated
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



               Evolution of approvals

Equipment approved that was not Ex

Approval processes were not good enough

A new strategic direction was required
 NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                        MINE SAFETY OPERATIONS



       From Approval to Certification

Queensland had accepted CoC’s as early as 1994

NSW looked to follow Qld

Active participation in Ex management schemes

By 1998 risk assessment was well established

In 1999 regulations changed along with approval
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



        From Approval to Certification

Other equipment was required to comply with specified
standards

Portable apparatus had to be used within a
management scheme
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



        From Approval to Certification

2002 - confident in the ANZ Ex scheme and the ANZ
Ex CB’s

AUS Ex and ANZ Ex CoC’s deemed suitable (with
conditions)

The IEC Ex scheme commenced – acceptance
extended to Australian issued IEC Ex CoC’s
   NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                          MINE SAFETY OPERATIONS



         From Approval to Certification

Extensive review of the IEC Ex scheme conducted
Canvassed industry via a discussion paper for full IEC
Ex acceptance
Legislation changed in December 2006
      approval became “registration”
      Ex equipment was not included
      Ex equipment had to meet specified criteria
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



        From Approval to Certification
Continuing to participate in Ex scheme MC’s
Continuing to review IEC Ex CoC’s and ATR’s
Planned random audits of IEC Ex ATR’s and CoC’ s
from ALL types of IEC bodies

Supported by a specific minesite program.
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                              MINE SAFETY OPERATIONS



   Overview – Approval to Certification

Approval and competency schemes evolved
Legislation embraced contemporary OH&S Mngt
National & International certification schemes matured
Industry culture evolved
All of this allowed the DPI to embrace certification
Redirect resources to mine site activities.
   NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                          MINE SAFETY OPERATIONS



 Summary – Regulation & Ex equipment
Coal mine explosions are high risk events.
Ex is a critical risk control
   Additional scrutiny is needed.
   The scrutiny must be credible

Ex equipment must be Ex throughout its life.
   When new, it is as good as it gets

Ex supported by the correct regulatory requirements
     NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                                MINE SAFETY OPERATIONS



        Ex equipment - Additional scrutiny
Be applied at the proper points of the equipment life cycle.
Support all activities throughout the life cycle.
Support the hierarchy of risk controls
Provide for a level of risk less than or equal to what we do now
Recognise the harsh mining environment
Be competent
Be credible
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



   Ex equipment - Credible scrutiny

Set standard
Consistent and repeatable
Competent people
Proper procedures
Fit for purpose equipment & facilities
Managed work environment
Ethical work environment
   NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                             MINE SAFETY OPERATIONS



Principles for managing Ex equipment
 Ex equipment to be certified
 Suppliers of equipment to provide sufficient life-cycle
 information
 Requires mines to have Ex repairs done at licensed facilities
 Requires a competent mine electrical engineer
 Requires an Electrical Engineering Management Plan
 Requires mines to establish electrical competency
 requirements
   NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                          MINE SAFETY OPERATIONS



IEC Ex – Support for the regulator
IEC Standards and Ex Schemes provide
   Standards of design
   Competent designers
   Third party design verification
   Confidence in the manufacture

Ex equipment arrives at the mine in an Ex condition.
   NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                          MINE SAFETY OPERATIONS



       IEC Ex – Support for the regulator

Equipment is installed, commissioned,
maintained & used properly
  Provision of information
  Selection, installation, commission, inspect and
  maintenance standards
  Competency for life-cycle management (proposed)
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                                      MINE SAFETY OPERATIONS



      IEC Ex – Support for the regulator
Ex management dictates overhaul and repair
Equipment overhauled and repaired back to its certified state
   Provision of information
   Repair and overhaul standards
   Independent assessment of competencies
   Independent assessment of workshops
       Facilities, tools, equipment and measurement
       Work processes, competencies and management systems
  NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                         MINE SAFETY OPERATIONS



Summary - IEC Ex supporting the regulator
The IEC Ex standards and IEC Ex schemes provide for:
   provision of information
   life cycle management
   appropriate independent assessment at appropriate points

All of the above is required by contemporary OH&S
legislation
    NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                           MINE SAFETY OPERATIONS



              A regulator using IEC Ex

Currently the DPI:
   has accepted equipment certified under the IEC Ex scheme.
   is monitoring the implementation of the IEC Ex services
   scheme

IEC Ex CoC’s have been accepted via a gazette notice
The regulator still retains prohibition powers
    NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                              MINE SAFETY OPERATIONS



                     OBSERVATIONS
IEC Ex certification of equipment - Very confident that it is Ex
Regulators can use this as a minimum expectation
The extent of national regulation is dependent on “safety culture”
Countries with no Ex certification can use the IEC Ex scheme
with confidence
Countries with developed national schemes can easily transition
to IEC Ex
Countries who rely on IEC Ex must participate
    NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                            MINE SAFETY OPERATIONS



                      CONCLUSIONS
The IEC Ex standards and schemes can aid:
   Life cycle management of Ex equipment
   The regulator’s aims for electrical engineering safety
   A mine operator’s fulfilment of OH&S obligations
   An equipment suppliers fulfilment of OH&S obligations

Credibility of the schemes is a critical component
We are committed to a highly credible IEC Ex scheme
     NSW DEPARTMENT OF PRIMARY INDUSTRIES
                                            MINE SAFETY OPERATIONS



     Other information & Contact details
Other Information
Technical and Safety Regulation of the Energy Sector
Discussion paper at www.ena.asn.au


Contact details
Website: www.minerals.nsw.gov.au/safety
Email: john.waudby@dpi.nsw.gov.au

				
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