An on-line regional overpower surveillance system for Candu reactors

Conference · Sat Jul 01 04:00:00 EDT 2006

OSTI ID:22030174

Wallace, D J; Caxaj, V; Seidu, A S; Hartmann, W; Sur, B; McDonald, A ^[1]

---

1. Atomic Energy of Canada Limited, 2251 Speakman Dr., Mississauga, Ont. L5K 1B2 (Canada)

The current methodology for establishing Regional Overpower Protection (ROP) trip set-points for Canada Deuterium Uranium (Candu{sup R} reactors requires an extensive and detailed assessment of the plant based on a distribution of channel and bundle powers (flux shapes) calculated from a range of device configurations (e.g., zone controller levels, adjuster bank movements, mechanical control absorber movements, shut-off rod insertions) and a set of thermalhydraulic plant data (channel flows, reactor inlet-header temperatures, channel differential pressure). An on-line approach would provide an interface to assist operators in routine monitoring, diagnostic and maintenance activities by providing Critical Channel Powers (CCP) and ROP set points from instantaneous flux shapes derived from real-time detector readings and associated thermalhydraulic conditions. This paper describes an Advanced On-Line Regional Overpower Surveillance (AOL-ROS) system currently under development at Atomic Energy of Canada Limited (AECL) for Candu reactors. Development has been based on an assessment using instantaneous operating data for the period February to April 2004 from a Candu 6 reactor located at Point Lepreau, New Brunswick (Canada). (authors)

• Research Organization: American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
• OSTI ID: 22030174
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
ATOMIC ENERGY OF CANADA LTD
BRUNSWICK-1 REACTOR
BRUNSWICK-2 REACTOR
CONTROL
FUEL ASSEMBLIES
MONITORING
NEUTRON ABSORBERS
NEUTRON FLUX
ON-LINE CONTROL SYSTEMS
POINT LEPREAU-1 REACTOR
POINT LEPREAU-2 REACTOR
REACTOR MAINTENANCE
REACTOR PROTECTION SYSTEMS
REACTOR SAFETY
REAL TIME SYSTEMS