SCWR Research in Korea. Yoon Y. Bae KAERI

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Transcription:

SCWR Research in Korea Yoon Y. ae KAERI

Organization President Dr. In-Soon Chnag Advanced Reactor Development Dr. Jong-Kyun Park Nuclear Engineering & Research Dr. M. H. Chang Mechanical Engineering & Research Dr. K.. Park Fluid Engineering & Research Dr. Y. Y. ae Thermal HYdraulic & Safety Research Dr. H. D. Kim PSA Dr. J. J. Ha Advanced Fuel Development Dr. D. S. Son PWR Fuel Development Dr. Y. H. Chung GEN IV KALIMER, Dr. D. H. Han SMART. Dr. S. K. Zee Nuclear Data Evaluation lab. 2002/11/19 2

Activities Feasibility study sponsored by KISTEP Provide information for decision making of MOST State of art Identify research items Lay foundation of SCWR research Draw attention of research community into SCWR 2002/11/19 3

Activities Feasibility study of SCWR concept Design Limits Core Primary and Safety Systems System performance and efficiency (KAERI Internal project) 2002/11/19 4

Activities I-NERI Radiolysis and Heat Transfer Studies for Supercritical-Water-Cooled Reactors (SCWRs) Mid to Long Term Nuclear R&D? 2002/11/19 5

Preliminary calculation 2002/11/19 6

S/G Sizing - Assumptions Use Griem s correlation Nu = 0.0169 Re 0.8456 Pr 0.432 ρw ρ Assume U-tube length 10m ω Assume 12% of tube length is economizer Overall HTC for economizer and evaporater are 3,355 and 7,565 W/m 2 K 0.231 2002/11/19 7

S/G Sizing Procedures h i = Nu d 1 = U k tube 1 h i + t k tube + 1 h o ( ) Q = UA T T sat Repeat until Q reaches 4000 MWt ( A = 2πd x) T w = T Q h A i T = T, i+ 1, i + Q m C SG P 2002/11/19 8

S/G Sizing - Results 2002/11/19 9

S/G Sizing - Results 2002/11/19 10

Core Sizing - Assumptions Use ishop s correlation Pitch/Diameter = 1.15 Nu Pr = 0.0069 Re C µ P =, k C P 2/3 Hydraulic diameter 3.26 mm Fuel diameter = 9.16 mm 0.9 Pr h = T W W ρ W ρ h T Tight lattice hexagonal fuel assembly 160 ass y 397 rods(324 fuel)/ass y 0.43 1 + 2.4D L 2002/11/19 11

Core Sizing - Procedures T b, i T = b, i 1 + q A m C c p Repeat until T reaches T hot = 565C T w = T b, i + q h i [ h i = f ( Tw,...)] 2002/11/19 12

Core Sizing - Results 2002/11/19 13

Inputs and Outputs Technical Data System pressure = 25.00000 MPa Steam Generator T COLD = 297.12759 ºC Core power = 4000.00000 MWt Heat transfer per S/G = 2000.77701 MWt Mass flow rate per S/G = 992.72563 kg/s Total flow area = 2.24849 m 2 Number of tubes = 10000 Tube length = 10.00000 m Total heat transfer area = 5315.57487 m 2 Mass flux = 441.50804 kg/m 2.s Average heat flux = 0.37640 MW/m 2 2002/11/19 14

Inputs and Outputs Core Fuel diameter = 9.16000 mm Pitch of fuel rod = 10.53400 mm Pitch to fuel diameter = 1.15000 mm Gap between fuel rods = 1.37400 mm Pitch of fuel assembly = 218.94507 mm Hydraulic diameter = 3.26294 mm Number of rod per fuel ass y = 397 Number of fuel rod per fuel ass y = 324 Number of fuel ass y = 160 Cross sect. area of all fuel ass y = 6.64234 m 2 Cross sect. area of all fuel rod = 4.18592 m 2 Net fuel channel area = 2.45641 m 2 Core mass flow rate = 1985.45126 kg/s Core mass flux = 808.27218 kg/m 2 s Core heat flux = 0.58800 MW/m 2 Core length = 4.64000 m Average specific power = 16.62942 kw/m RCP power = 115.07094 kw T HOT = 565.33124 ºC 2002/11/19 15

Thermal Efficiency From SG MS Reheater Reheater HP TN A C LP TN CON C A To SG FWP COP 2002/11/19 16

Thermal Efficiency A: Primary loop, SC condition + secondary of APR1400 (6.895 MPa saturated steam) : Option A + secondary of 20 MPa saturated steam C: Option A + secondary of 20 MPa superheated steam ( T = 100 ) D: Option A + secondary of SC condition, 24 MPa, 500 ) E: High pressure turbine at primary + secondary of APR1400 2002/11/19 17

Thermal Efficiency A C D E Core Power (MWt) 4000 4000 4000 4000 4000 Flow rate(kg/s) 21000 1935 1935 1935 1935 Primary SG Inlet Pres. (MPa) SG Outlet Pres. (MPa) SG Inlet Temp. (C) 25 24 565 25 24 565 25 24 565 25 24 565 25 10 565 SG Outlet Temp. (C) 297.12 297.12 297.12 297.12 295.26 Steam Pres. (MPa) 6.895 20 20 24 6.895 Secondary Steam Temp. (C) Steam Flow rate (kg/s)) Feedwater Temp. (C) Feedwater Pres. (MPa) 285 2375 253 8.96 365.7 4113 324 27 465.7 2404 324 27 500 2315 324 32.4 285 2113 253 8.96 Results Elec. Power (MWe) Pump Power (MW) 1432 30 1383 162 1646 95 1688 111 1656 (382+1274) 66 (39+27) Efficiency (%) 37.69 36.39 43.31 44.41 43.59 2002/11/19 18

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