Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
권호 표지

An Integrated On-Line Diagnostic System for the NORS Process of Maiden Reactor Project: The Design Concept and Lessons Learned

  • Published : 2000.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

During an extensive review made as part of the Integrated Diagnosis System project of the Maiden Reactor Project, MOAS (Maryland Operator Advisory System) was identified as one of the most thorough systems developed thus far. MOAS is an integrated on-line diagnosis system that encompasses diverse functional aspects that are required for an effective process disturbance management: (1) intelligent process monitoring and alarming, (2) on-line sensor data validation and sensor failure diagnosis, (3) on-line hardware (besides sensors) failure diagnosis, and (4) real-time corrective measure synthesis. The MOAS methodology was used at the Maiden Man-Machine Laboratory HAMMLAB of the OECD Maiden Reactor Project. The performance of MOAS, developed in G2 real-time expert system shell for the high-pressure preheaters of the NORS process in the HAMMLAB, was tested against a variety of transient scenarios, including failures of the control valves and sensors, and tube leakage of the preheaters. These tests showed that MOAS successfully carried out its intended functions, i.e., quickly recognizing an occurring disturbance, correctly diagnosing its cause, and presenting advice on its control to the operator. The lessons learned and insights gained during the implementation and performance tests also are discussed.

Keywords

References

  1. I.S. Kim, 'On-Line Process Failure Diagnosis: The Necessity and a Comparative Review of the Methodologies,' International topical Meeting on Safety of Thermal Reactors, Portland, Oregon, July 21-25 (1991)
  2. I.S. Kim, 'Computerized Systems for On-Line Management of Failures: A State-of-the-Art Discussion of Alarm Systems and Diagnostic Systems Applied in the Nuclear Industry,' Reliability Engineering and System Safety, 44, 279 (1994) https://doi.org/10.1016/0951-8320(94)90019-1
  3. o. Berg, R. E. Grini, T. Suzudo et al., 'Detailed Diagnosis Coupled to Model-Based Fault Detection in Process Plant Operation,' OECD Halden Reactor Project, HWR-220, May (1988)
  4. R. E. Grini, 'The Integrated Diagnosis System - The Integration Aspects and Extended Detailed Diagnosis,' Enlarged Halden Programme Group Meeting on Fuel Performance and Materials Testing and Man-Machine Systems Research, Storefjell, Gol, Norway, March 7-12 (1993)
  5. R. E. Grini and T. Kaarstad, 'Integration of Diagnosis Techniques for Process Surveillance,' OECD Halden Reactor Project, HWR-317, May (1992)
  6. I.S. Kim, M. Modarres, and R.N.M. Hunt, 'A Model-Based Approach to On-Line Process Disturbance Management: The Models,' Reliability Engineering and System Safety, 28, 265(1990) https://doi.org/10.1016/0951-8320(90)90115-4
  7. I.S. Kim, M. Modarres, and R. N. M. Hunt, 'A Model-Based Approach to On-Line Process Disturbance Management: The Application,' Reliability Engineering and System Safety, 29, 185 (1990) https://doi.org/10.1016/0951-8320(90)90078-2
  8. I.S. Kim, R. E. Grini, and S. Nilsen, 'A New Process Surveillance and Diagnosis System for NORS Based on the MOAS Methodology,' OECD Halden Reactor Project, HWR-386, October (1994)
  9. Gensym Corp., Version 3.0 of the G2 User's Manual, Gensym Corporation, Cambridge, MA (1993)