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give the guaranty of no broken rail (internal defect) on highly loaded tracks.
Preventive grinding would require new technologies with high production
output at low costs, as it is still large time slot consuming.
Safety: The broken rail detection issue will however remain, and will have
to be solved, in particular for high speed lines. In general, the replacement
from one type by an other type of detector, keeping all else constant, can
lead to “deterministic” hazardous situations and has to be compensated. For
example, the loss of broken rail detection would require as-yet undefined com-
pensating measures, e.g. close monitoring and grinding of rails with attendant
higher maintenance, to be implemented in order to meet the GALE require-
ments, with a “probabilistic” point of view. Phasing out one for another sys-
tem needs a new formal validation of the existing interlocking modules with
the new type of detector.
References
1. M. Antoni - P. Morand, “Migration of train detection systems for costs down
for future rolling stock - Rolling Stock related view” - September 2009
2. C. Meier-Hirmer, Ph. Pouligny, M. Antoni “Impact of preventive grinding on
maintenance costs and determination of an optimal grinding cycle” - SNCF,
Infrastructure, Maintenance Engineering, Paris, France - ESREL 2008
3. M. Antoni, C. Meier-Hirmer “Economic correlation between maintenance
and renewal - Optimization of maintenance strategies for tracks, signalling
equipment and overhead line components” - SNCF, Infrastructure, Mainte-
nance Engineering, Paris, France - WCRR 2008
