HI ECN3 - failure scenarios

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

3/1-021 (CERN)

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)

 

11:30 → 11:40 Introduction

Split the installation: underground and above ground

Speaker: Melania Averna (CERN)

11:40 → 12:10 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.

12:10 → 12:25 ECN3

ECN3: 30000m3/h
mainly in recirculation

Galleries: scenario to be confirmed

12:25 → 12:30 Way forward

To be discussed:

Failure of the new target complex cooling system - > stop operation

Target Complex as a whole: FIRIA