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Reactivity Control• Two types of control rods are used:Adjusters and Mechanical Control Absorbers• Adjuster Rods: to achieve maximum burn-upand to prevent local flux peaks• Mechanical Control Absorbers: tubes of cadmiumsandwiched between stainless steel tubes forlarge power level reductions• CANDU 6: 21 Adjuster Rods• CANDU 9: 24 Adjuster Rods
Reactivity Control• CANDU 6 and 9 reactors have two fullyindependent reactor shutdown systems• Shutdown System Number 1: Shutdown Rodsprovide large reactivity insertion by 32 solidneutron absorbing rods that are dropped intothe core• Shutdown System Number 2: uses the rapidinjection of concentrated gadolinium nitrate(poison) into the moderator
Page 1 and 2: Prof.Dr. H. BöckVienna University
Page 3 and 4: CANDU´s Worldwide• Canada: 22•
Page 5 and 6: Pickering NPPOntario PowerGeneratio
Page 7 and 8: Calandria and Pressure Tubes
Page 9 and 10: Fuel Bundle
Page 11 and 12: Fuel Handling and Storage
Page 13 and 14: Refuelling Cycle• Each complete f
Page 15 and 16: Nuclear Steam Supply System
Page 17 and 18: SteamGenerator
Page 19 and 20: Pickering A Technical Data• Fuel
Page 21 and 22: Pickering A Technical Data• Calan
Page 23: CANDU 6 vs CANDU 9• Fuel channels
Page 27 and 28: Other D 2 O Moderated Reactors• S
Page 29 and 30: Pu-ProductionProduction in kg/GWe-y
Page 31: Further Information on CANDUs• ht

Folie 1 - Atominstitut

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