Pressurizer sensor failure detection using a single sensor multistep parity relation

Conference · Fri Jun 01 00:00:00 EDT 1990 · Transactions of the American Nuclear Society; (USA)

OSTI ID:6024254

Tsai, T M; Chou, H P ^[1]

---

1. National Tsing-Hua Univ. (Taiwan)

With increasing demands on the safety and reliability of nuclear power stations, methods of fault detection and isolation (FDI) are creating increasing interest. The FDI process basically involves two steps: residual generation and decision making. The residual represents the difference between various functions of the sensor outputs and the expected values of these functions in the no-fail mode and is subsequently examined for the presence of failure signatures. In this paper, they develop an FDI monitor for pressurizer instruments, which employs the generalized parity relations derived from system equations for residual generation and uses likelihood ratio tests for decision making. The design is for diagnosis during steady-state and transient operations. To avoid difficulties in isolating multiple simultaneous sensor failures, individual FDI monitors are used for each sensor of interest.

• OSTI ID: 6024254
• Report Number(s): CONF-900608-; CODEN: TANSA; TRN: 91-008221
• Journal Information: Transactions of the American Nuclear Society; (USA), Vol. 61; Conference: American Nuclear Society (ANS) annual meeting, Nashville, TN (USA), 10-14 Jun 1990; ISSN 0003-018X
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
NUCLEAR POWER PLANTS
REACTOR MONITORING SYSTEMS
REACTOR COMPONENTS
FAILURES
DIAGNOSTIC TECHNIQUES
ALGORITHMS
DECISION MAKING
DETECTION
HEAT TRANSFER
HYDRAULICS
PRESSURIZERS
REACTOR SAFETY
RELIABILITY
TRANSIENTS
ENERGY TRANSFER
FLUID MECHANICS
MATHEMATICAL LOGIC
MECHANICS
NUCLEAR FACILITIES
POWER PLANTS
SAFETY
THERMAL POWER PLANTS
220200* - Nuclear Reactor Technology- Components & Accessories