1. PSS Plans for Improved Reliability and Availability

2. PSS Plans for improved Reliability and Availability
SSG systems scope
PSS Reliability – 2
2016 Ops StayTreat
Jerry Kowal

3. PSS Plans for improved Reliability and Availability
SSG Systems Scope
PSS – Access Control / Beam Containment
BCM – Beam Current Monitor
ODH – Oxygen Deficiency Monitoring System
PSS Reliability – 3
2016 Ops StayTreat
Jerry Kowal

4. PSS Plans for improved Reliability and Availability
Definitions
Reliability
The ability of an apparatus, machine, or system to consistently perform its intended or required function or mission, on demand and without degradation or failure.
Availability
Characteristic of a resource that is committable, operable, or usable upon demand to perform its designated or required function. It is the aggregate of the resource's accessibility, reliability, maintainability, serviceability, and securability.
Reliability of the Safety System
Primary focus on risk reduction related to Personnel Safety.
Dangerous failures vs. false shutdowns.
PSS Reliability – 4
2016 Ops StayTreat
Jerry Kowal

5. PSS Plans for improved Reliability and Availability
Reliability Assessment
Tools - Calculators
Continued improvement and development of existing tools and methods
Data Collection
Historical data
“Fresh” data since end of 12 GeV upgrade
Incorrect downtime assignment
Methodology of calculation
Perceived reliability of the Safety System
PSS – phantom trips, unexpected / inconsistent behaviors…
BCM – higher than normal trip rate, diagnostic problems…
ODH – increase of trip rates in the spring/summer, communication problems…
PSS Reliability – 5
2016 Ops StayTreat
Jerry Kowal

6. PSS Plans for improved Reliability and Availability
PSS System
Challenges
20+ years old hardware (PLCs, switches, network etc..)
20+ years of software and hardware modifications and development
Contains over 3000 I/O points
Independent systems for each segment with redundant configuration
Lack of scheduled and available maintenance time
Solutions
PLC upgrade process – started, planned for next couple of years
Continued Maintenance effort (door switches, maglocks, lights, limit switches etc..)
Reduction of system complexity at hardware and software level
Internal “cleanup” of software
Cooperation with OPS to improve PSS interface and documentation
PSS Reliability – 6
2016 Ops StayTreat
Jerry Kowal

7. PSS Plans for improved Reliability and Availability
BCM System
Challenges
Mid ‘90s hardware
Lack of diagnostics (only local)
No connection to Epics
Highly sensitive to Supply Voltage levels
Solutions
Add diagnostic feedback to Epics
Install diagnostic BLMs around the BCM cavities
Regain detailed knowledge of components
Improve testing techniques of spare components
PSS Reliability – 7
2016 Ops StayTreat
Jerry Kowal

8. PSS Plans for improved Reliability and Availability
ODH System
Challenges
20+ years old hardware
Around 100 sensing heads in the field
Short life span of the sensors
Sensitive to environmental changes
Solutions
Upgrade hardware – conceptual plan ready
Infrastructure changes – networking
New sensing technology – Hall D / Tagger uses new type of the sensors
Scheduled maintenance – trimming sensors, replacing sensors
Improved diagnostics for OPS
PSS Reliability – 8
2016 Ops StayTreat
Jerry Kowal

9. PSS Plans for improved Reliability and Availability
Path to Improvement
Resources – Staffing and Funding
We are requesting approval for hiring additional positions
Hardware upgrades require funding and allocated installation time
Preventive / Predictive Maintenance – Calendar / Schedule
Dedicated, sufficient time for maintenance activities
Data and experience driven Preventive / Predictive Maintenance
Well planned prioritized schedule
PSS Reliability – 9
2016 Ops StayTreat
Jerry Kowal

10. PSS Plans for improved Reliability and Availability
Path to Improvement
Training
Continued training and cross training for SSG members.
New members of SSG group are maturing in the specific experience and knowledge of the systems.
We’d like to propose migration of the SSO Training and Testing documents to MOODLE:
Consistent framework
Improved learning and testing process
Complete coverage of topics
Knowledge Base
Part of the training efforts to share knowledge to help with troubleshooting, diagnostics, training, preventing maintenance, etc..
PSS Reliability – 10
2016 Ops StayTreat
Jerry Kowal

11. PSS Plans for improved Reliability and Availability
Path to Improvement
System Improvements / Upgrades
Replacement of aging equipment
Upgrades implemented in timely fashion
Simplification of the systems without compromise of their function
“Cleanup” of the hardware and software developed over 20+ years
Documentation
PSS Reliability – 11
2016 Ops StayTreat
Jerry Kowal

12. PSS Plans for improved Reliability and Availability
Q & A
PSS Reliability – 12
2016 Ops StayTreat
Jerry Kowal