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Aging of Power Cables in Nuclear Power Plant due to Influence of Local Temperature Conditions

Irena Jakić ; Hrvatska elektroprivreda d.d., Sustainable Development and Quality Management Department Ulica grada Vukovara 37, 10000 Zagreb, Croatia
Nenad Debrecin ; Faculty of Electrical Engineering and Computing, Zagreb Croatia


Puni tekst: engleski pdf 2.279 Kb

preuzimanja: 318

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Sažetak

A significant number of operating nuclear power plants (NPP) is approaching the end of the
initially estimated design life. Considering that plants are stable and competitive, it may be possible
to extend design lives to 60 years (perhaps even longer).
Before expending life time, ageing in NPPs must be effectively managed to ensure the
availability of design functions throughout the plant service life. From the safety perspective, this
means controlling ageing degradation and wear-out within acceptable safety limits so that adequate
safety margins remain, i.e. integrity and functional capability in excess of normal operating
requirements.
Even though cables are not active component, they are vital components in NPPs since they
link the system components with instruments and control equipment used to monitor and control the
plant. Consequently, the functionality of the cable necessary for nuclear safety is necessity for
ensuring the functionality of equipment relevant to nuclear safety.
Since the cable ageing have been recognized as potential threat to safe operation of NPP, this
paper deals with cable ageing aimed at identifying effects of aging and to determine whether the
degradation caused by aging is within the stipulated tolerance limits. Also, it analyses the impact of
ambient temperature changes on the cable ageing comparing to a qualified life. For an illustration,
Arrhenius’s model was used to calculate cable ageing in hot spot with the increased local
temperature.

Ključne riječi

Hrčak ID:

199039

URI

https://hrcak.srce.hr/199039

Datum izdavanja:

31.7.2017.

Posjeta: 670 *