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Draft foundation accidents

GoalIdentification and consolidation of the high-level accidents list for operational level 
Requirements met by this process step

CSM-RA (402/2013) §2.5

EN 50126-1:2017 §7.4

EN 50126-2:2017 §5

Inputs

Sources/References:

  • [EU] DIRECTIVE (EU) 2016/798 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL (of 11 May 2016 on railway safety) 
  • [EU2] DIRECTIVE 2004/49/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL (of 29 April 2004 on railway safety) 

  • [UIC] UIC SAFETY DB (https://safetydb.uic.org/
  • [BEU] Bundesstelle für Eisenbahnunfalluntersuchung - BEU (https://www.eisenbahn-unfalluntersuchung.de
  • [RiL] Ril 423.0101A01 Definition der gefährlichen Ereignisse im Bahnbetrieb 4230101A01
Outputs

Fintie and complete set of accidents within transportation systems in EXCEL and Mindmap format: DBS Accidents List

Methodology

Definition/Scope

Accident is considered as "An unintended event or series of events that results in potential loss of life, loss of health or loss of environmental integrity. "

Accident are understood as the following safety-related losses:

  • Loss of life to people
  • Loss of health to people
  • Loss of integrity of environment

The "loss of a system or service"considered in CENELEC and CSM-RA is excluded from the analysis, this case will be considered separately as "incident".

Specific harm/accident resulting from terrorism (e.g. bomb explosion), arson, vandalism are not considered.

The consequences related to passenger security matter are also not considered.

Although suicide is not differenciated in the accident list, the related consequence is covered by the accident list (considering a single person is affected). 

Methodology

The hereafter steps have been followed for the definition of the accidents:

  1. Consideration of the accident explicitely defined in standard and regulation texts, add classical high level accidents based on the own experience;
  2. Adaptation/supplementation/Distinction of the accident considering different way of harming people (different extent for a same harm is not considered as a different accident);
  3. Verification the different type of area of railway system i.e. platform, train, track, infrastructure (bridge, tunnel) are reflected;
  4. Verification the harm related to the hazard captured (from standard and regulation texts) when carrying out the "Collection of Hazards" step are covered by the accident list;
  5. Verification the consistency/relevance of the accident when carrying out the "Generic Hazard Identification" step.

When performing the three last steps, some accidents have been renamed/reffined/supplemented (leave of the accident tree) if needed and sometimes the tree structure has been changed.

Remark: DB (EDS - Safety-Datenbank) database for accidents and disturbances/malfunctions does implement the categories of BEU

Three different consideration levels are considered for accident definition:

  1. accidents affecting train - called "Rolling Stock Accident" i.e. , abbreviated in RSA
    e.g. collision of train, derailment, train entering a life hostile environment..
  2. Explosion/Blast, Fire, Pollution (the accident can be assigned neither to Rolling Stock Accident nor to Accident of Person(s) strictly)
  3. accidents affecting persons directly (called "Accident of Person(s)", abbreviated in AP, e.g. asphyxia, crush, slip/trip, burn, deafening)

All identified accident have been asigned with the unique ID and structured in the hierarchical order.

Tools and non-human resources
Cardinality
  • Created and provided as a first stable draft or baseline incl. reviews
  • Accidents will be further implemented and maintained in Capella (Risk-State-Model)
  • In case of significant chages, set of accidents will be changed and confirmed by review (ensured by implemented quality management system and related processes)
Completion criteriaFinite and complete list of consolidated applicable independent accidents in transportation with clear description. The cutset of accidents provided in the list shall be empty.
Design reviewLink to the corresponding design review where the completion of this activity is evaluated.
Step done by (Responsible)RAMS Expert, Risk Manager and/or System Architect
Provides input to/assists (Contributes)

RU, IM, any competent expert

Uses outputs (Informed)

System Architect, RAMS Expert, Risk Manager