HI ECN3 - failure scenarios

Tuesday 12 Nov 2024, 11:30 → 12:30 Europe/Zurich

3/1-021 (CERN)

3/1-021

CERN

10

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Description

Goal: Identifying events ( or series of events) where safety measures or systems fail to perform as expected, potentially causing harm, injury or damage (significant repair costs and/or operational downtime)

- 1
  
  Introduction
  
  Split the installation: underground and above ground
  
  Speaker: Melania Averna (CERN)
- 2
  
  TCC8
  
  1 Access mode-> people present in TCC8 ( how many?)
  
  Ventilation stop ( failure or power cut)
  
  ()AHUs 20000 m3/h
  ()extraction: XXXXXm3/h - 1ACH c.ca -> Action F. Dragoni
  ()heat gain to be assessed
  no RP concerns if ventilation is lost
  
  To be assessed:
  
  Evacuation time -> Melania to check with PESS and Fire Brigade
  -Upon confirmed gas detection
  -Upon confirmed Fire detection
  -Manual call point ( evac and BIW)
  
  Current design
  Future design
  
  2 Operation
  
  Heat Gain: it should not change from the figure for access mode
  Head load in the target complex to be assessed (JLG)
  
  Any temperature and humidity control required? To be checked with all project team on monday
  
  Current design for the airlock; dedicated - HEPA- filter and fan (duty stand by)
  () interlocks logic - to be confirmed with Jani L.
- 3
  
  ECN3
  
  ECN3: 30000m3/h
  mainly in recirculation
  
  Galleries: scenario to be confirmed
- 4
  
  Way forward
  
  To be discussed:
  
  Failure of the new target complex cooling system - > stop operation
  
  Target Complex as a whole: FIRIA