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L. Mansani mansani@nuc.ansaldo.it

L. Mansani mansani@nuc.ansaldo.it. WP1.2 EFIT and XP-ADS Data. Reference Documents. EFIT

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L. Mansani mansani@nuc.ansaldo.it

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  1. L. Mansani mansani@nuc.ansaldo.it WP1.2 EFIT and XP-ADS Data

  2. Reference Documents EFIT • D1.24 Main Component Functional Sizing of the EFIT (under review to make consistent with D1.26 and to include primary system pressure losses, Lead volume, primary and target pumps characteristics, DHR 1 & DHR 2, CFX evaluation, etc) • D1.26 Main Component Assembly Drawings of EFIT (issued) XT-ADS • D1.27 & D1.28 Description and functional sizing of the Main Components of the Reference Design of the XT-ADS (Draft) • Main Component Assembly Drawings of EFIT (Draft)

  3. +1985 ΔPsg + ΔPc = P-head – ΔPp Primary coolant flow rates [Kg/s] total: 36000 across the core - fuel assemblies: 33000 - fuel assemblies by-pass: 650 - dummy assemblies: 550 across the HX of the Target Unit: 1500 across each pump: 9000 across each SG: 4500 +1473 ΔPsg +1085 P- head 1.37 bar +406 SG Pump ΔPp= 0.5 ξρv2 ξ=2.2 pump in operation ξ=3.7 pump free ξ= 5.6 pump locked SGU Midplane -1655 ΔPp 0.27 bar mfr 9000 kg/s ΔPsg 0.4 bar mfr 4500 kg/s ΔPc: fuel assemblies pressure drop ΔPp: pump duct pressure drop, with pump working ΔPsg: SG pressure drop P-head: head of the pump ΔPc = 0.7bar mfr = 33000 kg/s ΔPc-in = 0.3 bar ΔPc-out = 0.1 bar ΔP-rods = 0.2bar ΔPc-grids = 0.1 bar Core Midplane -5355 Pressure Drops and Free Levels in the EFIT Primary System

  4. +1985 +1473 +1085 M = 589 tons (8 SGs & 4 PPs) SG v = 0.6 m/s +406 Pump duct v = 1.5 m/s M = 855 tons DHR M = 174 t DHR v = 0.15 m/s M = 3596 tons M = 570 tons Total Mass of Lead = 5954 tons Core v = 1 m/s Lead Mass Distribution and Average Velocities in the EFIT Primary System M = 170 tons

  5. EFIT Primary Pump Characteristic

  6. XT- ADS General Arrangement

  7. XT- ADS General Arrangement

  8. XT- ADS Primary Heat Exchanger

  9. Mass Flow Rate, Pressure Drops and Free Levels In the XT-ADS Primary System Data for primary system design PHX (N° 4) mfr/PHX: 1750 kg/s ΔPPHX = 25000 Pa v = 1 m/s Core Pressure Drop Mass flow rate: 4518 kg/s Pressure drop: 90900 Pa Core v = 1.5 m/s Pump (N° 2) mfr/pump: 3500 kg/s ΔPpump: 47000 Pa Pump duct v = 1.9 m/s Δppump = 0.5 ξ ρ v2 ξ= 2.5 pump working ξ= 3.3 pump not locked ξ= 4.8 pump locked Core Mass Flow Rates Fuel A: 4518 kg/s By Pass: 296 kg/s Dummy A: 1258 kg/s Target: 206 kg/s Storage F: 90 kg/s Others: 631 kg/s

  10. XT- ADS Primary Pump Characteristic

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