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1970’s – King Inquiry 1995 – Maintain Safety Level - HSE 2001 – Precautionary Approach - HSE

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North London Network Management Unit. Why do we replace gas mains ?. 1970’s – King Inquiry 1995 – Maintain Safety Level - HSE 2001 – Precautionary Approach - HSE. Neil Shaw/v.1./30 January 2002. North London Network Management Unit. Mains Incidents 1976 to 2001. Trend Line.

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Presentation Transcript
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North London Network Management Unit

Why do we replace gas mains ?

  • 1970’s – King Inquiry
  • 1995 – Maintain Safety Level - HSE
  • 2001 – Precautionary Approach - HSE

Neil Shaw/v.1./30 January 2002

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North London Network Management Unit

Mains Incidents 1976 to 2001

Trend Line

slide3

North London Network Management Unit

Regional Breakdown

Neil Shaw/v.1./30 January 2002

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North London Network Management Unit

Minimising Disruption

  • Ofgem have capped our allowed costs for 2002 – 07 = Incentive to reduce cost= reducing
  • excavations
  • Decommission only where possible ratio target 1:1.1 lay:decommission
  • Use no – dig techniques where possible typically50 – 60% achieved

Neil Shaw/v.1./30 January 2002

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North London Network Management Unit

Summary

  • Safety
  • Precautionary approach applied by HSE under Pipeline Safety Regulations
  • Regulatory Incentive to reduce cost = reduceexcavation
  • Aim to minimise disruption by use of non digtechniques

Neil Shaw/v.1./30 January 2002

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North London Network Management Unit

Neil Shaw/v.1./30 January 2002

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North London Network Management Unit

Neil Shaw/v.1./30 January 2002

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