International Railway Safety Conference
Download
1 / 23

Review and Assessment of the Korea Rail s Safety Performance using Risk Assessment Models - PowerPoint PPT Presentation


  • 196 Views
  • Uploaded on

International Railway Safety Conference 2009, Sweden. Review and Assessment of the Korea Rail ’ s Safety Performance using Risk Assessment Models. Chan-Woo Park, Jong-Bae Wang, Sang-Log Kwak, Don-Bum Choi National Railway Safety R&D Program Office, Korea Railroad Research Institute.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Review and Assessment of the Korea Rail s Safety Performance using Risk Assessment Models' - ora


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

International Railway Safety Conference 2009, Sweden

Review and Assessment of the Korea Rail’s Safety Performance using Risk Assessment Models

Chan-Woo Park, Jong-Bae Wang, Sang-Log Kwak, Don-Bum Choi

National Railway Safety R&D Program Office,

Korea Railroad Research Institute


Contents

I

Introduction

II

How do risk assessment models assess

the safety performance?

III

Safety Performance

IV

Conclusion


1. Introduction

Background

  • Cyclic occurrence of major train accidents

  • - 2003: Daegu, subway train fire accident, 191 fatalities

  • - 1993: Gupo, train derailment accident, 78 fatalities

  • - 1982: Kyongsan, train collisions, 54 fatalities

  • Environmental changes in Korea

  • - KTX (Korea Train eXpress) operation at 2004

  • - Structural reform of railroad industries

  • - Electrification of conventional lines

  • - Preparation of TCR & TSR

  • “Railway Safety Act” announced in 2004

  • - Focused on the risk-based safety management

  • - Nation-wide railroad safety program & safety regulations

  • - Hazard analysis, risk assessment & control


1. Introduction

Research Objective

Since Oct. 2005, KRRI has developed

the common hazard analysis & risk assessment models

for the Korea Railway.

Research Objective is to introduce

- Developing procedure of the risk models

- Application of the developed model to the Korea railway

- the Korea rail industry’s safety performance

against some defined risk areas


2. How do risk assessment models assess the safety performance?

Risk Assessment Procedure

Hazard Identification

Defining the Initiating Hazardous Events

Development of Accident Scenarios

Casual

Analysis

Consequence

Analysis

Railway Accident

Progress Scenarios

Railway Accident

Appearance Scenarios

Hazardous

Events

FTA Model

ETA Model

Risk Evaluation & Reduction


2. How do risk assessment models assess the safety performance?

System & Boundary Definition

Typical railway system configuration proposed in SAMRAIL project

  • According to the accident classification of “Railway Accident Report Regulation”,

  • The scenarios were divided into the five main areas

    • 1) Train collision accident,

    • 2) Train derailment accident,

    • 3) Train fire accident,

    • 4) Level crossing accident,

    • 5) Railway (traffic/safety) casualty accident.


2. How do risk assessment models assess the safety performance?

Risk Measure Method

Risk assessment model

: the form of a cause and consequence analysis

: using fault trees and event trees.

Collective Risk

(Average Number of FWI/year)

=

Frequency

(Average frequency at which the scenario sequence occurs)

X

Consequences

(the number of FWI/scenario sequence)


2. How do risk assessment models assess the safety performance?

Data Population

  • Industry safety data: safety related incidents within industry database.

  • Incidents recorded range from train collisions to passenger burns from coffee spills

  • Many thousands of recordsare reviewed and classified

  • Where data was not available,

  • Use was made of:

  • - Human error probability assessments

  • : using a revised Human Error Assessment and Reduction Technique (HEART)

  • - Safety expert judgmentsfrom in-house expertise within Korea railway.

  • - Statistical methods including Monte Carlo simulation and Bayesian uncertainty distributions.


3. Safety Performance performance?

Risk Areas

Engineering

Passenger Behaviors

Rolling Stock

Suspected Suicide

Infrastructure

Inside Station

Equipment

On Train

Workforce Behaviors

Boarding/Alighting

Train Crew

Outside Station

Train Driver

Shunter and Signaler

Level Crossing

Station Staff

Public Behaviors

Rolling Stock Engineer

Suspected Suicide

Infrastructure Engineer

Energy/Signal Engineer

Regulation Violation

Level Crossing Worker

Level Crossing

Office Worker

Carelessness

Railway Associate Employee

Irregular Employee


3. Safety Performance performance?

Risk Profile

• Most of the risk is to members of the public.

• Passenger risk arises from a number of sources.

• Workforce risk arises largely from areas that are under the control of the workforce.

• Relatively few non-fatal public injuries are recorded.

• Most of the risk arises from factors being primarily the responsibility of the injured party.


3. Safety Performance performance?

Recent Safety Trends

Passenger-km increases 2% every year.

Considering this factor, the safety performance has improved.

• The risk in 2007has been decreased by more than 55% over 2003 year.

• The harm to members of the workforce has been maintained at the lower levels.

• Fatalities and weighted injuries to members of the public decreased from year to year.


3. Safety Performance performance?

Risk Profile by Risk Areas

Public Behaviors

Passenger

Behaviors

Workforce

Behaviors

Engineering


3. Safety Performance performance?

Train Accidents

Serious train accidents are rare,

trends in train accident precursors were analyzed.

• The train accident precursors have been decreased by more than 34% over 2003.

• The increment of the train accident precursors in 2004 and 2005 is largely

due to the introduction of the Korea Train eXpress (KTX) operation.


3. Safety Performance performance?

Passenger Safety

Main Passenger Risk Areas


3. Safety Performance performance?

Main Risk Areas of the Passenger Safety

Passenger Suspected Suicides Inside Station

Passenger Violation & Carelessness Inside Station

Passenger Violation & Carelessness on Train


3. Safety Performance performance?

Public Safety


3. Safety Performance performance?

Level Crossing

The number of level crossing had decreased from 1,657 in 2003 to 1,455 in 2007.

92% of level crossings has automatic protection equipments.

• The risk in level crossings has been decreased by more than 30% over 2003.

• The risk level associated with level crossings is average 12.32 FWIs per year.

• Pedestrian risk accounts for 45% of all risk associated with level crossings.

• The risk caused by “road vehicle breaking through or detouring the barrier"

governs the most part of the road vehicle occupant fatalities.


3. Safety Performance performance?

Workforce Safety

Main Workforce Risk Areas


3. Safety Performance performance?

Trespass and Suspected Suicide Fatalities


3. Safety Performance performance?

F-N Curve: Annual Korea Railway F-N curve


3. Safety Performance performance?

Comparison Between UK's F-N Curve and Korea’s F-N Curve


4. Conclusion performance?

  • This study

    • Developed the common risk assessment model for the Korea railway

    • Reviewed the Korea rail industry’s safety performance against defined risk areas

  • The risk including suspected suicides in 2007

    • Was 125.44 FWIs

    • Has been decreased by more than 55% over 2003 year

  • The developed model will provide a generic model of the safety risk on the Korea railway

  • which will

    • Increase the industry’s knowledge of the risk from the operation and maintenance

    • Allow the identification of areas of railway operation that need further risk controls

    • Allow sensitivity analyses to be carried out to determine the risk reduction

    • Allow cost benefit analysis of proposed changes


Thank you! performance?


ad