SPS Smoke Removal Control System Reengineering

1
SPS Smoke Removal Control System Re-engineering

• by
• P. Ninin, S. Grau

2
Outline

• Introduction
• Workshop conclusions
• Functional Safety Study
• Architecture Proposal
• Action Plan
• Conclusions

3
Introduction

Responsibilities

Owner DSO
TIS
FB
ST
CV
AA
4
Workshop Conclusions

• Fire Brigade mission defined
• Current system
• Objective Improve ventilation and facilitate FB
  job
• Goal Oriented to protect the machine
• (machine closed, electric fire)
• It is not a real smoke removal system
• It is not a safety system
• Assure a reliable control system at least in such
  a conditions - Functional Safety Study

5
Functional Safety Analysis


Architectures
TDS
ACS
EC GTD
EC Landis
Concentrateurs
Concentrateurs
Air Injection
Air Extraction
6
External Functional Analysis


7
Internal Functional Analysis


Safety Function 1 Fire alarms to SCR
Detection Equipment BAx E1
8
Internal Functional Analysis


Safety Function 2 Smoke Removal Commands
9
Internal Functional Analysis


Safety Function 3 Interlock
Smoke Removal Synoptics Industrial PC BAs - E3
10
Dysfunctional Analysis


Safety Functions
11
Functional Safety Analysis


Critical components
12
Dysfunctional Analysis


Critical Environments
13
Recommendations

• Based on the simplified architecture
• Redundant path for smoke removal and Interlock
  commands
• CSAM safety network
• Supervision of critical components
• Autotest / test
• Performance measure
• Audit software of critical components
• Special care when modifying critical components
• Procedures
• Maintenance coordination
• Redundant power supply
• Not cut by Emergency stop
• Update documentation for operation and
  maintenance
• EDMS
• Avoid smoke removal commands from SCR and TCR
• Improve when CSAM safety network available

14
Architecture Proposal


TCR
SCR
spstds1 EC GTD
srvtds1 TDS
stdlog Logging
PLC Concentrator
BA Synoptic
PLC Extraction
Power supply - Redundant power supply - Review
?t Performance measure Modifications
procedures Maintenance coordination Documentation,
EDMS
PLC Injection
PLC CDIN
15
Action Plan


16
Conclusions

• Implementation phase
• ? weekly follow-up
• ? System ready for March 2000
• People safety improvement when machine is open
• ? NEW PROJECT (This request being under the
  responsibility of SL/DSO and TIS)