1. North Area Safety Review 2019
North Area Safety Review Gaz Detection Underground & Galleries premises Technical solutions & Cost estimates Resources estimates
by S.Grau
Thanks to: M. Averna, N.Broca from BE-ICS-AS for their contributions
6 Juin 2019
North Area Safety Review 2019

2. North Area Safety Review 2019
Outline
Gas Detection
Underground
Galleries
Maintenance Cost
Consideration
6 Juin 2019
North Area Safety Review 2019

3. Gas Detection - Underground Technical Solution
Recommendations
Assessment
EHN2 installation arrives to the end of live (2004)
Compulsory regular consolidation
ECN3 Rationalisation gas detection infrastructure in SPS North Area
Coherence for maintenance and FB
Extension North Area architecture and technical solution to ECN3 and EHN2
6 Juin 2019
North Area Safety Review 2019

4. North Area Safety Review 2019
Gas Detection - Underground Cost Estimates
Provided for NA-CONS-REPORT-001
Cost estimate based on existing gas detection coverage
Real prices of B1159 contract
6 Juin 2019
North Area Safety Review 2019

5. Gas Detection - Galleries Technical Solution
North Area Gas Safety Concept (EDMS , )
Recommendations
Assessment
ODH and CO2 risk exists in the gallery of EHN1,ECN3, EHN2 due to the lack of ventilation and the thus stagnating air in the gallery:
The current ODH detection system is not fit-for-purpose. The fixed ODH detectors can even give a false sense of safety and we recommend to removed them/are not sufficient. The use of portable ODH and CO2 detectors is advisable instead.
Considering the presence of CO2, it is recommended to implemented CO2 detectors or wear portable CO2 detectors.
Requested by project only
Extension North Area architecture and technical solution to galleries
Pre-requisite: renewal of EHN2 and upgrade of ECN3
Extension of EHN2&ECN3 and EHN1 Saleve infrastructure needed
EDMS
6 Juin 2019
North Area Safety Review 2019

6. Gas Detection - Galleries Technical Solution
EDMS
6 Juin 2019
North Area Safety Review 2019

7. North Area Safety Review 2019
Gas Detection - Galleries Cost Estimates
Provided for NA-CONS-REPORT-001
Cost estimated based on umber of detectors and flashes in conceptual design
Real prices of B1159 contract
15 % Contingency
6 Juin 2019
North Area Safety Review 2019

8. North Area Safety Review 2019
Gas Detection – Under. & Galleries Cost & Resources Estimates
Update for Safety Review
Cost Estimate
Assessment
220 KCHF EHN2
Compulsory regular consolidation
80 KCHF ECN3
Coherence for maintenance and FB
425 KCHF Galleries
Requested by project only
Resources
FTE required
BE-ICS-AS
0.3 FTE/year of project (2y)
0.5 FTE/year of project (2y)
6 Juin 2019
North Area Safety Review 2019

9. North Area Safety Review 2019
Maintenance cost Cost Estimates
Provided for NA-CONS-REPORT-001
Cost estimates based on B1159 prices for traditional fire detection
Update for Safety Review
Cost Estimate
+ 30 kCHF/year +/- 20 %
6 Juin 2019
North Area Safety Review 2019

10. North Area Safety Review 2019
Considerations
Extensions of B1159, no need to go through an IT
Installation time of 1 year seems ambitious
EN/EL planned ENH2 cabling
Cabling for Galleries not requested to EN/EL
6 Juin 2019
North Area Safety Review 2019