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CANFLEX - an advanced fuel bundle for CANDU.

DE91639249

Publication Date	1989
Personal Author	Hastings, I. J.; Lane, A. D.; Boczar, P. G.
Page Count	30
Abstract	The performance of CANDU pressurized heavy-water reactors, in terms of lifetime load factors, is excellent. More than 600 000 bundles containing natural-uranium fuel have been irradiated, with a low defect rate; reactor unavailability due to fuel incidents is typically zero. To maintain and improve CANDU's competitive position, Atomic Energy of Canada Limited (AECL) has an ongoing program comprising design, safety and availability improvements, advanced fuel concepts and schemes to reduce construction time. One key finding is that the introduction of slightly-enriched uranium (SEU, less than 1.5 wt% U-235 in U) offers immediate benefits for CANDU, in terms of fuelling and back-end disposal costs. The use of SEU places more demands on the fuel because of extended burnup, and an anticipated capability to load-follow also adds to the performance requirements. To ensure that the duty-cycle targets for SEU and load-following are achieved, AECL is developing a new fuel bundle, termed CANFLEX (CANdu FLEXible), where flexible refers to the versatility of the bundle with respect to operational and fuel-cycle options. Though the initial purpose of the new 43-element bundle is to introduce SEU into CANDU, CANFLEX is extremely versatile in its application, and is compatible with other fuel cycles of interest: natural uranium in existing CANDU reactors, recycled uranium and mixed-oxides from light-water reactors, and thoria-based fuels. Capability with a variety of fuel cycles is the key to future CANDU success in the international market. The improved performance of CANFLEX, particularly at high burnups, will ensure that the full economic benefits of advanced fuels cycles are achieved. A proof-tested CANFLEX bundle design will be available in 1993 for large-scale commercial-reactor demonstration. (Atomindex citation 22:060799)
Keywords	Fuel Element Clusters Slightly Enriched Uranium Burnup Candu Type Reactors Cost Benefit Analysis Mixed Oxide Fuels Performance Thorium Cycle Uranium Recycle Meetings Foreign technology EDB/210400 EDB/210802
Source Agency	International Nuclear Information System
NTIS Subject Category	77I - Reactor Fuels & Fuel Processing
Corporate Authors	Atomic Energy of Canada Ltd., Chalk River (Ontario). Chalk River Nuclear Labs.
Supplemental Notes	International conference on availability improvements in nuclear power plants, Madrid (Spain), 10-14 Apr 1989.
Document Type	Conference Proceedings
NTIS Issue Number	199204

CANFLEX - an advanced fuel bundle for CANDU.

CANFLEX - an advanced fuel bundle for CANDU.
DE91639249

Publication Date	1989
Personal Author	Hastings, I. J.; Lane, A. D.; Boczar, P. G.
Page Count	30
Abstract	The performance of CANDU pressurized heavy-water reactors, in terms of lifetime load factors, is excellent. More than 600 000 bundles containing natural-uranium fuel have been irradiated, with a low defect rate; reactor unavailability due to fuel incidents is typically zero. To maintain and improve CANDU's competitive position, Atomic Energy of Canada Limited (AECL) has an ongoing program comprising design, safety and availability improvements, advanced fuel concepts and schemes to reduce construction time. One key finding is that the introduction of slightly-enriched uranium (SEU, less than 1.5 wt% U-235 in U) offers immediate benefits for CANDU, in terms of fuelling and back-end disposal costs. The use of SEU places more demands on the fuel because of extended burnup, and an anticipated capability to load-follow also adds to the performance requirements. To ensure that the duty-cycle targets for SEU and load-following are achieved, AECL is developing a new fuel bundle, termed CANFLEX (CANdu FLEXible), where flexible refers to the versatility of the bundle with respect to operational and fuel-cycle options. Though the initial purpose of the new 43-element bundle is to introduce SEU into CANDU, CANFLEX is extremely versatile in its application, and is compatible with other fuel cycles of interest: natural uranium in existing CANDU reactors, recycled uranium and mixed-oxides from light-water reactors, and thoria-based fuels. Capability with a variety of fuel cycles is the key to future CANDU success in the international market. The improved performance of CANFLEX, particularly at high burnups, will ensure that the full economic benefits of advanced fuels cycles are achieved. A proof-tested CANFLEX bundle design will be available in 1993 for large-scale commercial-reactor demonstration. (Atomindex citation 22:060799)
Keywords	Fuel Element Clusters Slightly Enriched Uranium Burnup Candu Type Reactors Cost Benefit Analysis Mixed Oxide Fuels Performance Thorium Cycle Uranium Recycle Meetings Foreign technology EDB/210400 EDB/210802
Source Agency	International Nuclear Information System
NTIS Subject Category	77I - Reactor Fuels & Fuel Processing
Corporate Authors	Atomic Energy of Canada Ltd., Chalk River (Ontario). Chalk River Nuclear Labs.
Supplemental Notes	International conference on availability improvements in nuclear power plants, Madrid (Spain), 10-14 Apr 1989.
Document Type	Conference Proceedings
NTIS Issue Number	199204