Probabilistic simulation of cable performance and water based protection in cable tunnel fires

Anna Matala (Corresponding Author), Simo Hostikka

    Research output: Contribution to journalArticleScientificpeer-review

    19 Citations (Scopus)

    Abstract

    Nuclear power plants contain a significant amount of fire load in form of electrical cables. The performance of the cables is interesting both from the fire development and system failure viewpoints. In this work, cable tunnel fires are studied using numerical simulations, focusing on the fire spreading along power cables and the efficiency of the water suppression in preventing the cable failures. Probabilistic simulations are performed using Monte Carlo technique and the Fire Dynamics Simulator (FDS) as the deterministic fire model. The primary fire load, i.e. the power cables are modelled using the one-dimensional pyrolysis model, for which the material parameters are estimated from the experimental data. Two different water suppression systems are studied. The simulation results indicate that using either suppression system decreased the heat release rate in the tunnel to less than 10% of the non-suppressed case. Without water suppression, the cables of the second sub-system were damaged in almost all fires, but when either of the studied water suppression systems was used, the probability of the cable failures was decreased to less than 1%. This result indicates that in current scenario, the probability of losing both sub-systems is determined directly by the suppression system unavailability.
    Original languageEnglish
    Pages (from-to)5263-5274
    Number of pages12
    JournalNuclear Engineering and Design
    Volume241
    Issue number12
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed
    EventThe18th International Conference on Nuclear Engineering - Xi'an, China
    Duration: 17 May 201021 May 2010

    Fingerprint

    cable
    cables
    tunnels
    Tunnels
    Fires
    Cables
    tunnel
    Water
    retarding
    water
    simulation
    system failures
    nuclear power plants
    nuclear power plant
    pyrolysis
    Nuclear power plants
    simulators
    simulator
    Pyrolysis
    Simulators

    Cite this

    @article{c53efa990429446f9545957f579f3bac,
    title = "Probabilistic simulation of cable performance and water based protection in cable tunnel fires",
    abstract = "Nuclear power plants contain a significant amount of fire load in form of electrical cables. The performance of the cables is interesting both from the fire development and system failure viewpoints. In this work, cable tunnel fires are studied using numerical simulations, focusing on the fire spreading along power cables and the efficiency of the water suppression in preventing the cable failures. Probabilistic simulations are performed using Monte Carlo technique and the Fire Dynamics Simulator (FDS) as the deterministic fire model. The primary fire load, i.e. the power cables are modelled using the one-dimensional pyrolysis model, for which the material parameters are estimated from the experimental data. Two different water suppression systems are studied. The simulation results indicate that using either suppression system decreased the heat release rate in the tunnel to less than 10{\%} of the non-suppressed case. Without water suppression, the cables of the second sub-system were damaged in almost all fires, but when either of the studied water suppression systems was used, the probability of the cable failures was decreased to less than 1{\%}. This result indicates that in current scenario, the probability of losing both sub-systems is determined directly by the suppression system unavailability.",
    author = "Anna Matala and Simo Hostikka",
    year = "2011",
    doi = "10.1016/j.nucengdes.2011.09.014",
    language = "English",
    volume = "241",
    pages = "5263--5274",
    journal = "Nuclear Engineering and Design",
    issn = "0029-5493",
    publisher = "Elsevier",
    number = "12",

    }

    Probabilistic simulation of cable performance and water based protection in cable tunnel fires. / Matala, Anna (Corresponding Author); Hostikka, Simo.

    In: Nuclear Engineering and Design, Vol. 241, No. 12, 2011, p. 5263-5274.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Probabilistic simulation of cable performance and water based protection in cable tunnel fires

    AU - Matala, Anna

    AU - Hostikka, Simo

    PY - 2011

    Y1 - 2011

    N2 - Nuclear power plants contain a significant amount of fire load in form of electrical cables. The performance of the cables is interesting both from the fire development and system failure viewpoints. In this work, cable tunnel fires are studied using numerical simulations, focusing on the fire spreading along power cables and the efficiency of the water suppression in preventing the cable failures. Probabilistic simulations are performed using Monte Carlo technique and the Fire Dynamics Simulator (FDS) as the deterministic fire model. The primary fire load, i.e. the power cables are modelled using the one-dimensional pyrolysis model, for which the material parameters are estimated from the experimental data. Two different water suppression systems are studied. The simulation results indicate that using either suppression system decreased the heat release rate in the tunnel to less than 10% of the non-suppressed case. Without water suppression, the cables of the second sub-system were damaged in almost all fires, but when either of the studied water suppression systems was used, the probability of the cable failures was decreased to less than 1%. This result indicates that in current scenario, the probability of losing both sub-systems is determined directly by the suppression system unavailability.

    AB - Nuclear power plants contain a significant amount of fire load in form of electrical cables. The performance of the cables is interesting both from the fire development and system failure viewpoints. In this work, cable tunnel fires are studied using numerical simulations, focusing on the fire spreading along power cables and the efficiency of the water suppression in preventing the cable failures. Probabilistic simulations are performed using Monte Carlo technique and the Fire Dynamics Simulator (FDS) as the deterministic fire model. The primary fire load, i.e. the power cables are modelled using the one-dimensional pyrolysis model, for which the material parameters are estimated from the experimental data. Two different water suppression systems are studied. The simulation results indicate that using either suppression system decreased the heat release rate in the tunnel to less than 10% of the non-suppressed case. Without water suppression, the cables of the second sub-system were damaged in almost all fires, but when either of the studied water suppression systems was used, the probability of the cable failures was decreased to less than 1%. This result indicates that in current scenario, the probability of losing both sub-systems is determined directly by the suppression system unavailability.

    U2 - 10.1016/j.nucengdes.2011.09.014

    DO - 10.1016/j.nucengdes.2011.09.014

    M3 - Article

    VL - 241

    SP - 5263

    EP - 5274

    JO - Nuclear Engineering and Design

    JF - Nuclear Engineering and Design

    SN - 0029-5493

    IS - 12

    ER -