north area fire risk assessment - indico...§4.1 current fire safety systems • fire protection...

North Area

Fire Risk AssessmentFire Safety Review (06.06.2019)

2

EDMS 2159975v1

Art Arnalich, HSE-OHS-IB

North Area Fire Risk Assessment

NA CONS Safety Review

EDMS 2159975v1

HSE involvement

(2016) BE-ICS-AS Memo (EDMS 1716309) requesting an

extension of the SPS Fire Project to the NA.

Endorsed by FB at the time.

(Dec 2017) Formal request by Project NA-CONS to

perform a fire risk assessment in the underground and

surface.

3North Area Fire Risk Assessment


EDMS 2159975v1

https://edms.cern.ch/document/1716309/1

• North Area underground FRAfull fire risk assessment for the entire underground area

EDMS 1895523v1

• North Area surface FRAlightweight fire risk assessment only for BA81

EDMS 2041630v1

• Proposal for Fire Safety improvement Summary of Prescriptions and Recommendations

EDMS 2135860v1

4

HSE deliverables



EDMS 2159975v1

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• Consolidation of existing fire safety systems is

considered as granted.

• Life Safety

• (occupants, victims, firefighters)

• Environment Protection

• Property protection

• Continuity of operations

5

HS

EO

wn

er

Prescriptions

Recommendations

All measures shall

undergo a cost-benefit

analysis



EDMS 2159975v1

Proposal for Fire Safety Summary of Prescriptions and RecommendationsEDMS 2135860v1


North Area (underground areas)

Fire Risk Assessment

6

EDMS 1895523v1

Art Arnalich, HSE-OHS-XP

Fire Safety Engineering Team

April 2018


§1.2 Methodology

• Follows HSE Fire Risk

Assessment Methodology [1]

compliant with ISO 16732 [2]

• No RP consequence estimation

• Probabilistic quantitative- scenario frequency of occurrence ISO

- quantification of consequences

[1] EDMS 1857076 Probabilistic Quantitative Fire Risk Assessment for CERN Complex Experimental Facilities, HSE Fire Safety Engineering Team

[2] ISO 16732-1:2012. Fire Safety Engineering – Fire Risk Assessment

7A. Arnalich, HSE-OHS-XP


EDMS 2113716v1


§3 Scope

• North Area SPS complex underground experimental

premises

~2.5km tunnels, 4300m of beam lines



EDMS 2159975v1



EDMS 2113716v1

11A. Arnalich, HSE-

OHS-XP

North Area Fire Risk

Assessment

§4.1 Current Fire Safety Systems

• Fire protection level from the 70’s (no upgrades since)

• Fire detection, 40 year-old sprinkler system in shafts

• Lack of fire compartmentalization→ smoke and fire spread can extend through the entire area affecting

upstream beam surface building

• Absence of an alarm system → occupants rely on self-awareness of the presence of a fire to start

evacuation

• Limited firefighting means (only extinguishers)→ tactical approaches are limited and exposed as there are no safe,

smoke free areas in the underground



EDMS 2159975v1

TDC2-TCC2-TT83

Design fire: TV+CTH (16.5MW@2000s)

SOOT



EDMS 2159975v1

t = 5 mint = 0 min

t = 10 min t = 20 min

TDC2-TCC2-TT83

Design fire: TV+CTH (16.5MW@2000s)

TEMPERATURE



EDMS 2159975v1

20

§8 Risk Evaluation (I)

• Safe evacuation cannot be guaranteed.

• Victims are exposed to toxic smoke,

unlikely to be located and rescued.

• Firefighter intervention can only be

understood to rescue victims and in such

case firefighter safety is compromised.

WORSEthan SPS FIRE

EQUALto SPS FIRE

EQUALto SPS FIRE



EDMS 2159975v1

21

§8 Risk Evaluation (II)

• Uncontrolled radioactive smoke release.

• Full loss of affected area. Smoke damage

likely to extend to large areas.

• EHN1, EHN2, ECN3 physics program

impacted

EQUALto SPS FIRE

EQUALto SPS FIRE

LESSthan SPS FIRE



EDMS 2159975v1

22

§9 Proposal for improvement

• It is strongly suggested to follow the proposal

encompassed in the SPS Fire Safety Project:

• Four inter-dependent packages of fire protection measures

• Flexible enough to be retrofitted in an existing facility

• Agreed in the SPS by all safety stakeholders and

actors

• Covers life safety and environment protection.

• Also covers property protection and continuity of

operations.

• The SPS FIRE concept is also applied / proposed for BDF,

HiLumi, FCC or CLIC.



EDMS 2159975v1

23

§9 Proposal for improvement• Compartmentalization

Upgrade all existing ventilation doors to fire doors, isolate communicating galleries and neighboring surface facilities (i.e. EHN1, EHN2)

• Integration of Fire Safety actionsEarly fire detection system; capability to trigger an evacuation alarm and a message upon fire detection, action on evacuation push buttons, BIW (beam imminent warning) situations, fire service control room; and also the integration of safety actions such as compartmentalization, ventilation stop and other machine functions with the previously mentioned signals.

• Fire SuppressionReplace and extend to junction areas the existing automatic fire sprinkler system in PA80 and PGT802

• Fire Intervention meansProvide standard firefighting tractor and trolley, on site at TDC8 and TA801 locations and install a firefighting standpipe throughout the facility.



EDMS 2159975v1

North Area (surface areas)

B890 (BA81) Fire Risk Assessment

24

EDMS 2041630v1

Art Arnalich, HSE-OHS-XP

Fire Safety Engineering Team

September 2018



EDMS 2159975v1


Methodology

• A lightweight fire risk assessment methodology is

chosen to provide an overview of the current fire

safety situation of the surface buildings of NA.

• 3 representative buildings: BA81, GHN300 and EHN1

• Hybrid approach:

1. compliance with prescriptive requirements wherever possible

and;

2. expert judgement in a credible worst-case scenario when

falling out of applicable codes.



EDMS 2159975v1

Scope

BA81 (890)



EDMS 2159975v1

Conclusions

For life:

• simple measures to improve the evacuation strategy are deemed to be sufficient to reach acceptance(evacuation sirens, alarm buttons and link fire detection to alarm)

For property protection and continuity:

• a full loss of the facility is an credible scenario

• in case of willingness (user choice) to improve protection level a number of measures are listed(sprinkler, foam system and/or fire detection in the false floor)

• It is strongly recommended to further study the applicability to similar layout buildings of the SPS: BA1 through BA6, BA80 and BA82.



EDMS 2159975v1

For the NA underground:• HSE came to similar findings of those in the SPS and prescribed

the SPS FIRE concept for the protection of life, environment, property and continuity of ops.

• The SPS FIRE concept is also applied at BDF, HiLumi, FCC or CLIC.

For the NA surface:• HSE prescribed some evacuation upgrades (sirens, alarm

buttons) for life safety.

• HSE prescribed a campaign to rationalize excessive fuel load in storage areas for life safety.

• HSE advised that full loss of a BA building is a plausible scenario and recommended fire protection improvement measures for property protection to be studied by risk owner.

28

General conclusions



EDMS 2159975v1

Proposal for Fire Safety Summary of Prescriptions and RecommendationsEDMS 2135860v1



EDMS 2159975v1

SPS North Area Fire Risk Assessment Summary of prescriptions and recommendations

EDMS No: 2135860v1 – April 2019 A. Arnalich, HSE-OHS-XP

Page 2 of 4

ID Assessment Geographical scope

Improvement measure

(for detailed info refer to fire risk assessment reports)

01 Mandatory for life safety and environment

protection

Covers also property

protection and continuity of operations

Underground areas

Compartmentalization

Upgrade all existing ventilation doors to fire doors EI90.

Isolate communicating galleries (i.e. GHN300) with fire

doors EI90.

Isolate neighboring surface facilities (i.e. EHN1, EHN2)

with fire doors EI120.

Break TT83 and TT84 into 2 fire compartments each,

using fire doors EI90, to avoid compartments longer

than 450m.

Normally opened fire doors to be equipped with remote

action release mechanism, monitoring position and

self-action thermal fuse.

02 Mandatory for life safety

and environment protection



Underground

areas Integration of Fire Safety actions

Upgrade or replace fire detection system to ensure

early detection .

Install a system capable of transmiting an alarm, along

with a message containing safety instructions, to

occupants anywhere in the North Area. This alarm shall

be triggered upon fire detection, action on evacuation

push buttons, CERN FB action out of CERN FB

SCR/CCC or BIW (beam inmminent warning)

situations. Evacuation push buttons shall cover all

premises.

Integrate fire detection and evacuation push buttons

with safety actions such as compartmentalization,

ventilation stop and other machine functions according

to a predefined fire protection logic.

03 Mandatory for life safety

and environment protection



Underground

areas Fire Suppression

Replacing the existing automatic fire sprinkler system in

PA80 and PGT802 with a fire sprinkler system (design

density of 12,5mm m2 min-1 and 68°C rated sprinklers)

extending the covered area to PA80, TA801, PGT802,

PA802 and the TDC2/TCC2 junction area.



Page 3 of 4

04 Mandatory for life safety and environment

protection


protection and continuity of

operations

Underground areas

Fire Intervention means

Provide standard firefighting tractor and trolley, on site

at TDC8 and TA801 locations. The firefighting trolley

encompasses a 200L portable CAFS, 2 self-contained

breathing apparatus, a set of extinguishers, 80m of

hose layout and nozzle, forcible entry tools and a fire

door water curtain protection set.

A standpipe (wet or dry configurations) throughout the

facility, with Storz55 outlets every 80m or less,

delivering a maximum of 500LPM at two simultaneous

locations.

05 Mandatory for life safety BA type buildings

Establish evacuation routes following the Safety Guideline “Evacuation Procedure and Principles for CERN sites in French Territory” EDMS 1815461v1.

06 Recommended for life safety

BA type buildings

Develop and implement an evacuation plan.

07 Mandatory for life safety BA type

buildings

Install evacuation sirens, alarm push buttons and link

fire detection and evacuation alarm.

08 Recommended for property protection

BA type buildings

Reduce distance to reach fire extinguisher to 10m.

09 Recommended for property protection

BA type buildings

Replace 2kg CO2 extinguishers by 5kg CO2

handheld devices

10 Recommended for property protection (to undergo cost/benefit analysis)

BA type buildings

Link the stop of ventilation systems to fire detection.


BA type buildings

Fire detection in volume under false floor.


BA type buildings

Fire detection in air supplies.


BA type buildings

Install a smoke extraction system.


BA type buildings

Link smoke extraction system to fire detection.


BA type buildings

An automatic fire suppression system (sprinkler or high expansion foam) in the volume under the false.


BA type buildings

Prearranged openings to fill volume under the false floor with high expansion foam produced by CERN FB.



Page 4 of 4

17 Mandatory for life safety BA type buildings

BA type specific intervention plan. A broader scope intervention plan suited for BA typologies is also acceptable.

18 Optimization of existing fire protection systems for life safety purposes.

Should office blocks inside BA building be no longer in use, the air sampling fire detection system is judged excessive.

19 Mandatory for life safety EHN type experimental halls

Campaign to rationalize excessive fuel load in storage areas, improve storage layouts and remove unnecessary combustible material. This is applicable to both permanent storage and transient fuel

packages.

20 Recommended for property protection (to undergo

cost/benefit analysis)

EHN type experimental

halls

Extend smoke extraction system to areas not currently covered or only featuring a temperature

control vent system.

22 Recommended for life safety

EHN type experimental

halls

Update existing and exercise the evacuation plan; develop and implement an evacuation plan in its

absence.

22 Mandatory for life safety EHN type

experimental halls

Install evacuation sirens, alarm push buttons and link

fire detection and evacuation a fire alarm system is absent.

23 Recommended for property

protection (to undergo cost/benefit analysis)

EHN type

experimental halls

Link the stop of ventilation systems to fire detection.



EHN type

experimental halls

Link smoke extraction system to fire detection to

ease intervention and avoid excessive smoke stacking.

25 Mandatory for life safety EHN type

experimental halls

EHN type specific intervention plan. A broader scope

intervention plan suited for EHN typologies is also acceptable.



EHN type

experimental halls

Fire compartmentalization in connections to TT81,

TT82, TT84 and GHN3.


Thanks

Questions



EDMS 2159975v1

north area fire risk assessment - indico...§4.1 current fire safety systems • fire protection...

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