APR1400 KNF/ / 2008. 4. 11 13
Table of Contents 1. APR1400 LBLOCA (Now vs. Before) 2. 3. 4. 13 2
1. APR1400 LBLOCA (Now vs. Before) Now Before 13 3
1. APR1400 LBLOCA (Now vs. Before) PCT Before Now SIT Normal SIT FD-SIT 13 4
1. APR1400 LBLOCA (Now vs. Before) PCT SIP-DG ( ) Before Now 13 5
1. APR1400 LBLOCA (Now vs. Before) PCT Before Now Noding - UGS Thot Tavg - Downcomer 2 ch. 6 ch. Conservative Decay Heat (120 %) ANS 79*u Assumptions P_containment (1 bar) CONTEMPT4 Power (102 %)... 100 % ± u SI - SIT Water Vol. 1600 ft3 (min) 1790 ft3 (min) - SIP ~ 130 % 13 6
1. APR1400 LBLOCA (Now vs. Before) APR1400 : KREM Code : RELAP5 Mod3.3 Patch 03 KREM : / / / 14 13 7
2. APR1400 PIRT, = 1.0 DEG/PD + Single Failure + LOOP (1/3) A :, B:, C: (FD- ), D: (SIT Empty) 13 8 1:, 2:, 3:, 4:, 5:
2. APR1400 PIRT (2/3) 13 9
2. APR1400 PIRT (3/3) 13 10
2. Forslund-Rhosenow Film Boiling HTC Weisman Transition Boiling HTC APR1400 ECC Bypass (CL/DC - Cross-flow Junction) MIDAS Downcomer Boiling ( DC ) DOBO KREM 13 11
2. 3,4 No. Parameter Distribution Mean Uncertainty 1) 1 Fq Uniform 2.265 0.325 2 Gap conductance dial Uniform 1.125 0.375 3 Fuel conductivity Normal 1.0 0.05 4 Core power Normal 1.0 0.01 5 Decay heat Normal 1.0 0.033 6 Burst temperature dial Uniform 1.0 0.1 7 Burst strain dial Uniform 1.0 0.7 8 Oxidation dial Normal 1.0 0.0125 9 Groeneveld chf dial Normal 1.0 0.379 10 Chen nucleate boiling dial Normal 1.0 0.2 11 Zuber chf dial Normal 1.0 0.15 12 Tmin dial Uniform 750 150 13 Forslund-Rhosenow dial Uniform 1.0 0.5 14 Dittus-Boelter, liquid dial Normal 1.0 0.1275 15 Dittus-Boelter, vapor dial Normal 1.0 0.1275 16 Bromley dial Normal 1.0 0.185 17 Weisman dial Uniform 1.118 1.07 18 Weber dial Uniform 8.35 5.65 19 Subcooled Cd Normal 0.89 0.035 2-phase Cd Normal 1.07 0.12 Pump K-factor Uniform 0.535 0.515 22 Pump head multiplier Uniform 0.5 0.5 23 Pump torque multiplier Uniform 0.5 0.5 24 Pressurizer pr., bar Normal 152.4 1.72 25 SIT pressure, bar Uniform 41.435 2.135 26 SIT water volume, m 3 Uniform 52.63 1.94 27 SIT water temperature, K Uniform 302.45 19.45 28 SIP flow multiplier Uniform 0.0 0.5 29 IRWST water temp., K Uniform 310.9 13 12 1) Standard deviation for normal distribution and one-side variation for uniform distribution
3. -MIDAS 13 13
3. -DOBO 8 Subcooling Degr 7 6 5 4 3 2 Experiments data 2-channel 1-channel 1 0 4 5 6 7 8 9 10 Heat Flux (W/cm) 2 Void Fractio 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 Case 1 - data Case 2 - data Case 3 - data Case 4 - data Case 1 - RELAP Case 2 - RELAP Case 3 - RELAP Case 4 - RELAP Void Fractio 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 Case 1 - data Case 2 - data Case 3 - data Case 4 - data Case 1 - RELAP Case 2 - RELAP Case 3 - RELAP Case 4 - RELAP 0.2 0.2 0.1 0 0 1 2 3 4 5 6 Axial Position (m) 0.1 0 0 1 2 3 4 5 6 Axial Position (m) 13 14
3. FLECHT/SEASET FSS SRS 1. Chen CHF 0.382 to 1.61 (normal) 2. Zuber CHF 0.536 to 1.464 (normal) 3. Dittus-B Liq 0.606 to 1.394 (normal) 4. Dittus-B Vap 0.606 to 1.394 (normal) 5. Bromley 0.428 to 1.572 (normal) 6. Forslund-Rohsenow 0.5 to 1.5 (normal) 7. Weber 1.350 to 7.0 (uniform) 8. flooding rate (mm/sec) - 10.994 to 10.994 (normal) 9. power (kw) - 6.613 to 6.613 (normal) 10. Boron Nitride conductivity 0.691 to 1.309 (normal) 11. Boron Nitride heat capacity 0.821 to 1.179 (normal) 12. tmin (K) 600.0 to 900.0 (uniform) 13. Weisman 0.048 to 2.188 (uniform) 13 15
3. ATLAS Test 15 13 16
3. ATLAS Test 15 13 17
3. ATLAS Test 15 13 18
4. 13 19
. 13 20