PK6010
Reliability Assessment of Safety-Critical Systems
Continuing education course lectured in English
The course gives an introduction to risk analysis
and reliability assessment of safety instrumented systems (SIS). The
focus is on the requirements in the IEC 61508 and related standards.
Time:
- Part 1: 16-17 October, 2006
- Part 2: 18-20 October, 2006
- Part 3: 06-10 November, 2006
Place: NTNU, Trondheim
Extent of course:
7.5 credits (in the NTNU/ECTS system) Target
group: Personnel involved in design, verification, and
operation of safety instrumented systems (SIS). Qualifications
required: The course is an introductory course and
requires limited prior knowledge. The participants should, however,
have studied at least 3 years at university level. Participant who are
familiar with probability theory, and have a basic knowledge of risk
and reliability analysis, may skip Part 1 and start directly on Part 2.
Course material:
A special compendium (in English) will be prepared for the course.
Academic contact: Professor
Jørn
Vatn
Department of Production and Quality
Engineering, NTNU
Telefon: +47 73597109
Email: jorn.vatn@ntnu.no
Exam: Friday, 10 November 2006
Application deadline: 22
September 2006 Application form and
more information: Follow this link Course
fee: NOK 15.900,-
Course objectives During the course the
participants will: - Get insight into
different types of safety instrumented systems and the demands for such
systems
- Get an overview of the contents of
important standards like IEC 61508, IEC 61511, and EN50129 and the OLF-070 guideline.
- Learn
about failures and failure classification, e.g., random hardware
failures and systematic failures
- Learn how the
reliability of such systems can be estimated and assessed
- Learn
about reliability data, quality of data, and data sources
- Get
insight into special topics related to such systems, like common cause
failures and software integrity
Coures presentation -
Lectures
- Coursework/exercises (carried out by
groups of 3-4 students). Reports from the coursework have to be
prepared, and will be marked and form a basis for the evaluation.
- Presentation and discussion of data and information sources
- Case studies
Course
topics Part 1: - Introduction
to probability theory; random variables, distributions, mean, variance,
etc.
- Introduction to reliability theory; the
exponential distribution, failure rate, survival function, MTTF
- FMECA, reliability block diagrams, structure functions,
system reliability.
Parts 2-3:
- Introduction to the IEC 61508 standard, and
related standards
- What is a safety instrumented
system (SIS)?
- Probability of failure on demand
(PFD)
- Safety integrity level (SIL)
- Testing (periodic, diagnostic)
-
Failure classification
- FMEDA
- Data
sources and quality of data
- Common cause failure
assessment
- Spurious trip rate
- Assessment
of systems with high/low demand mode of operation
- Risk
analysis for SIL allocation
- Case studies
The course topics listed above are preliminary,
and will be revised and updated.
Preliminary
schedule ::: Week 1 ::: Part
1: Monday (10:15-16:00) - Introduction
to probability theory; random variables, distributions, mean, variance,
etc.
- Introduction to reliability theory; the
exponential distribution, failure rate, survival function, MTTF
Tuesday (08:15-16:00) - FMECA,
reliability block diagrams, structure functions, system reliability.
Part 2: Wednesday
(08:15-16:00) - The safety life cycle
- SIS basic concepts
- Definitions and
classifications; SIF, SIS, SIL, failure modes
- IEC
61508 vs IEC 61511
- Industry experience:
Application of IEC 61508/11
- Exercises
Thursday (08:15-16:00) - Risk
acceptance criteria
- Safety barriers and barrier
diagrams
- Probability of failure on demand (PFD) -
concept, models, and calculation
- Exercises
Friday (08:15-15:00) - The
OLF 070 guideline - application and limitations
- Common
cause failures (CCF)
- CCF modeling - the
beta-factor model
- Defense measures against CCF
- Exercises
::: Week 2 :::
Part 3: Monday (10:15-16:00)
- Data basis, data sources and data uncertainty
- The PDS method
- Follow-up of SIL
performance in the operational phase
- Exercises
Tuesday (08:15-16:00) - Hardware
safety integrity (HSI) requirements
- Industry
experience: Implementation of HSI requirements
- Are
safe failures really safe?
- Exercises
Wednesday (08:15-16:00) - Systematic
safety integrity and software safety integrity
- Implementation
of software safety requirements
- Exercises
Thurdsay (08:15-16:00)
- High demand versus low demand systems
- Reliability
calculations for high demand systems
- High demand
applications
- Exercises
Friday
(08:15-15:00) - Summing up - questions
- Exam.
Lecturers
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