CANDUNUCLEAR - Thorburn Flex | Expansion Joints

1 Thorburn Flex IncFlexible Piping SpeciaServing the candu nuclear Community Seal Metallic BellowsFuel ChannelFuelling TubesheetAnnulus BellowsThorburn Flex IncFlexible Piping Flex offers unmatched capabili es and exper se in applica ons engineering, design development and manufacture ofcustom flexible piping systems for candu nuclear power plants. Opera ng under a strategy of global presence, Thorburn Flexhas structured and developed a specific candu business unit used to service this niche market sector. Through this candu business unit, our nuclear products consistently meet and exceed all quality design requirements of our candu nuclear reactorbusiness Quality Custom Flexible Piping SystemsAn important componentwithin the calandria fuelchannel is the annulus sealmetallic bellows which formpart of the annulus gas sys-tem.

2 Thorburn s annulus sealmetallic bellows assembliesare manufactured with mul ple ply Inconel SB443alloy 625 LCF and formed using a proprietary hydro formingprocess. The bellows seams are welded using a fusion weldingprocess without filler metals. The collar plies are fused using resistance welding while the collars are welded to the BellowsA achment Ring and the Fuelling Tubesheet using GTAW or robo cally using an orbital welding process. Thorburn s metallicbellows assemblies are designed and manufactured to , , ASME Sec III, Class 2 & 3, as s Precision hydro formed bellows manufactured with various ply thicknesses Thorburn s Calandria Fuel Channel Bellows123456789101112131415 Calandria Fuel Channel Assembly 2014 Thorburn Flex Inc1.

3 End Fitting2. Channel Closure3. Feeder Connection4. Liner Tube5. Positioning Assembly Stud6. Fuel Support Plug7. Pressure Tube8. Position Assembly Yoke9. bellows Attachment Ring10. bellows Assembly11. Fuelling Tubesheet12. Lattice Tube13. Calandria Tubesheet14. Calandria Tube15. Fuel BundleAnnulus bellows AssemblyEach end of the annulus between a calandria tube and a pressure tube is sealed by an Inconel bellows . The bellows allow axial mo on of the channels and also supports the torque of the end fi ng from the feeder piping. The Advanced candu Reactor (ACR) bellows is similar in design to the candu 6 bellows and is similarly installed.

4 The material (Inconel 625 LCF) is the same as candu 6. A small diameter tube welded to the bellows connects the sealed annulus that surrounds each fuel channel to the annulus gas uses mul -ply bellows for increased cyclelife and when lower forces are required while s llmaintaining the same pressure capacity. The mul -plies act in unison as far as hoop pressure loadingis concerned but act individually when cycle life and forces are calculated. bellows can be designed with various convolu on heights to simplify installa BellowsIn a candu reactor, the high pressure coolant and fuel is contained in several hundred small diameter horizontal channels (Fuel Channels).

5 The Fuel Channels are insulated from the moderator by the gas in the annulus formed between the pressure tube and the concentric calandria tube. The calandria tubes are part of the calandria vessel pressure boundary that is the container for the low pressure, low temperature, heavy water Range: 10mm - 250mmThorburn s precision hydro forming bellows machine capable offorming from 10mm to 250mmThorburn s 6 ply bellows with various convolution heightsOver 50 Years of Flexible Piping ExperienceWaiting To Serve Flex IncFlexible Piping SpeciaTHORBURN FLEX HEAD OFFICE173 Oneida, Pointe-Claire, QuebecCanada, H9R 1A9 Tel: +1-514-695-8710 Fax: AMERICASTHORBURN FLEX Poland41 Wroclawska St.

6 Jelena, G ra, PolandTel: +48-75-752-1793 Fax: +48-75-752-1793 ASIATHORBURN FLEX Malaysia162 1st floor, Jalan Sungai Ujong, Taman AST70200, Seremban, Negeri, Sembilan, MalaysiaTel: +601-96608863 Fax: +606-76370981-800-363-6613 (Toll Free North EUROPECRN for all Canadian ProvincesISO 9001: U Stamp (Registered)ASME NPT Stamp (In Progress)Metallic bellows for active drainage systems Miniature bellows for FM head separator potentiometer Metallic bellows for Fuel Rod Flask & Rod Cup Seal Metallic bellows for fuel rod flask limit switch)