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

17 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 -