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DTSTART:20100314T030000
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DTSTART:20101107T010000
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DTSTAMP:20100429T174822Z
UID:EDAF857F-E5B6-11E7-833E-0050568D7F66
DTSTART;TZID=America/Toronto:20100427T140000
DTEND;TZID=America/Toronto:20100429T153000
DESCRIPTION:Joint meeting with PES. Seminar format. Abstract: Manhole event
 s are dominated by “smokers” and fires\, with relatively few e
 xplosions. This suggests that the conditions which result in explosions ar
 e a small subset of those which result in “smokers” and fires.
  Our objective is to gain a quantitative understanding of the phenomena on
  which the evolution of manhole events depend in order to eliminate the co
 nditions which result in explosions. We have found that manhole events can
  be divided into those driven by electrical fault energy\, which are a sma
 ll minority\, and those driven by fire in which electrical energy starts t
 he event which can evolve thereafter to a manhole explosion without any fu
 rther input of electrical energy. This latter\, dominant\, class of manhol
 e events is driven by fire\, which requires air flow down the duct. We bel
 ieve that by controlling air flow\, fire-driven manhole explosions can be 
 eliminated\, and we are presently in the process of modeling the fire-driv
 e process using computational gas dynamics. In addition to the above issue
 s\, the material properties which result in fire-drive manhole events will
  be discussed\, along with quantitative measurements of gas evolution from
  decomposition of secondary cable insulation and jacket.\n\nToronto\, Prin
 ce Edward Island\, Canada
LOCATION:Toronto\, Prince Edward Island\, Canada
ORGANIZER:
SEQUENCE:0
SUMMARY:[Legacy Report] Causes and Mitigation of Manhole Events 
URL;VALUE=URI:https://events.vtools.ieee.org/m/49959
X-ALT-DESC:Description: <br />Joint meeting with PES. Seminar format. Abstr
 act: Manhole events are dominated by “smokers” and fires\, wit
 h relatively few explosions.  This suggests that the conditions which resu
 lt in explosions are a small subset of those which result in “smoker
 s” and fires.  Our objective is to gain a quantitative understanding
  of the phenomena on which the evolution of manhole events depend in order
  to eliminate the conditions which result in explosions.  We have found th
 at manhole events can be divided into those driven by electrical fault ene
 rgy\, which are a small minority\, and those driven by fire in which elect
 rical energy starts the event which can evolve thereafter to a manhole exp
 losion without any further input of electrical energy.  This latter\, domi
 nant\, class of manhole events is driven by fire\, which requires air flow
  down the duct.  We believe that by controlling air flow\, fire-driven man
 hole explosions can be eliminated\, and we are presently in the process of
  modeling the fire-drive process using computational gas dynamics.  In add
 ition to the above issues\, the material properties which result in fire-d
 rive manhole events will be discussed\, along with quantitative measuremen
 ts of gas evolution from decomposition of secondary cable insulation and j
 acket.
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