ML031610789
| ML031610789 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 05/31/2003 |
| From: | Hilton P, Joffre P, Sung Y Westinghouse |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2005-0108 WCAP-15306-NP-A, Rev 0, Add 1 | |
| Download: ML031610789 (72) | |
Text
Westinghouse Non-Proprietary Class 3 WCAP-1 5306-NP-A, Addendum 1 June 2002 Revision 0 Addendum 1 to WCAP-1 5306-N P-A Qualification of ABB Critical Heat Flux Correlations with VIPRE-01 Code
@) Westinghouse
Westinghouse Non-Proprietary Class 3 WCAP-15306-NP-A, Addendum 1 Addendum 1 to WCAP-15306-NP-A Qualification of ABB Critical Heat Flux Correlations with VIPRE-01 Code May 2003 Prepared by:
Y. Sung P. F. Joffre P. A. Hilton
© 2003 Westinghouse Electric Company LLC All Rights Reserved
ACKNOWLEDGEMENTS The authors wish to acknowledge the contribution made by W. H. Slagle and reviews of this document by Z. E. Karoutas and J. J. Akers. The authors would also like to thank C. E. Schultheis for her assistance in preparation of the manuscript.
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TABLE OF CONTENTS Section Title Page 1.0 Introduction ............................... 1 2.0 Intended Applications ............................... 2 3.0 Qualification of ABB-NV Correlation ............................. 4 3.1 ABB-NV Database ............................... 4 3.2 ABB-NV Correlation .............................. 4 3.3 VIPRE Model .............................. 4 3A Comparison with TORC Results ............................... 5 4.0 Qualification of ABB-TV Correlation .............................. . 18 4.1 ABB-TV Database .............................. 18 4.2 ABB-TV Correlation .............................. 18 4.3 VIPRE Model .............................. 18 4.4 Comparison with TORC Results .............................. 23 5.0 Conclusions ............................... 29 6.0 References ............................... 30 Appendix A VIPRE/ABB-NV Database .A-1 Appendix B VIPRE/ABB-TV Database .B-1 ii
LIST OF TABLES Table Title Page 2-1 Applicable Range of ABB CHF Correlations .......................................................... 3 3-1 Geometric Characteristics of ABB-NV Correlation and Validation Tests ............................ 7 3-2 Summary of VIPRE Model with ABB-NV in Comparison with TORC Model .................... 8 3.3 VIPRE and TORC M/P Comparison for ABB-NV Database ................................................. 13 4-1 Geometric Characteristics of ABB-TV Correlation and Validation Tests ............................ 19 4-2 Summary of VIPRE Model with ABB-TV in Comparison with TORC Model .................... 20 4-3 VIPRE and TORC NIP Comparison for ABB-TV Database ................................................. 24 A-1 VIPRE/ABB-NV Database .......................................................... A-2 B-1 VIPRE/ABB-TV Database .......................................................... B-2 i
LIST OF FIGURES Figure Title Page 3-1 Typical Radial Geometry, ABB-NV Test For 21 Rods, 14x14 Geometry ............................... 9 3-2 Typical Radial Geometry, ABB-NV Test For 25 Rods, 14x14 Geometry .............................. 10 3-3 Typical Radial Geometry, ABB-NV Test For 21 Rods, 16x16 Geometry .............................. 11 3-4 Typical Radial Geometry, ABB-NV Test For 25 Rods, 16x16 Geometry .............................. 12 3-5 Measured CHF vs. VIPREIABB-NV Predicted CHF ...................................................... 14 3-6 VIPRE/ABB-NV MIP vs. Pressure ...................................................... 15 3-7 VIPRE/ABB-NV M/P vs. Local Mass Velocity ...................................................... 16 3-8 VIPRE/ABB-NV MIP vs. Local Quality ...................................................... 17 4-1 Typical Radial Geometry, ABB-TV Test For 32 Rods, 14x14 Geometry .............................. 21 4-2 Typical Radial Geometry, ABB-TV Test For 36 Rods, 14x14 Geometry .............................. 22 4-3 Measured CHF vs. VIPRE/ABB-TV Predicted CHF ...................................................... 25 4-4 VIPRE/ABB-NV MJP vs. Pressure ...................................................... 26 4-5 VIPRE/ABB-NV MIJP vs. Local Mass Velocity ...................................................... 27 4-6 VIPRE/ABB-NY%NI/P vs. Local Quality ...................................................... 28 iv
Addendum 1 to WCAP-15306-NP-A Addendum 1 to WCAP-15306-NP-A Qualification of ABB Critical Heat Flux Correlations with VIPRE-01 Code 1.0 Introduction ABB Critical Heat Flux (CHF) correlations (Ref 1) were developed for 14x14 and 16x16 fuels of Pressurized Water Reactors (PWR) designed by the former Combustion Engineering (CE). The ABB-NV correlation is for CE-PWR 14x14 and 16x16 fuels with non-mixing vane grids, and ABB-TV is for the 14x 14 Turbo fuel with mixing vane grids. The correlations were developed based on CHF data obtained from the Heat Transfer Research Facility of Columbia University. A CHF correlation is also comnonly referred to as a Departure from Nucleate Boiling (DNB) correlation in PWR safety analyses.
Westinghouse VIPRE-01 (VIPRE) modeling and qualification for PWR non-LOCA thernal-hydraulic (T/H) safety analysis are described in WCAP-15306-NP-A (Ref. 2). Westinghouse has installed ABB-NV and ABB-TV CHF correlations into its version of the VIPRE code. The correlation coding addition does not alter the fundamental VIPRE computational methods and functional capabilities. In the Safety Evaluation Reports (SER) on the VIPRE code (Ref. 3, 4) and Westinghouse VIPRE model (Ref. 5), the NRC staff required additional justification on the use of a new CHF correlation not currently included in the VIPRE code. The SER on the ABB CBF correlations (Ref. 6) also states that a submittal is required for use of ABB-NV and ABB-TV with a computer code other than TORC.
This addendum provides justification on use of the ABB CHF correlations with the VIPRE code in compliance with the SER conditions (Ref. 3, 4, 5). It is organized into six sections. Section 2 describes intended applications of the VIPRE code with the ABB CHF correlations. Section 3 provides a description of VIPRE modeling of the ABB-NV database and comparison of VIPRE results with the original TORC values. A similar description on VIPRE modeling of the ABB-TV database and comparisons between VIPRE and TORC is provided in Section 4. Conclusions and references are presented in succeeding sections.
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Addendum 1 to WCAP-15306-NP-A 2.0 Intended Applications Westinghouse intends to use the VIPRE code in replacement of the TORC code for DNB analyses of the CE-PWR fuels using the current NRC-approved methodology. The ABB CHF correlations will be used with the VIPRE code for calculating DNB Ratio (DNBR) similar to the current applications with the TORC code. The DNB analyses include defining safety limits that provide the basis for reactor protection system setpoints and predicting minimum DNBR in non-LOCA transient analyses.
Westinghouse will apply the VIPRE code with the ABB CBF correlations under the following conditions consistent with the requirements in the SER (Ref. 6):
- 1. The 95/95 DNBR limits of the ABB-NV and ABB-TV correlations are not lower than the current NRC-approved limit of 1.13 for the CE-PWR fuels.
_, 2. The ABB-NV and ABB-TV correlations are used with the VIPRE code, in addition to the TORC and CETOP-D codes currently used for CE-P WR. This addendum demonstrates VIPRE equivalency to TORC for DNBR calculations.
- 3. The ABB-NV and ABB-TV correlations are used with the optimized Fc shape factor (Ref. I) to account for effects of non-uniform axial power shapes.
- 4. The current range of applicability for the ABB-NV and ABB-TV correlations as shown in Table 2-1 remains applicable.
- 5. The ABB-NV and ABB-TV correlations are used only for CE-PWR fuel designs with NRC-approved methodology for PWR safety analysis.
__ 6. Technology transfer is accomplished through a process that meets the requirements specified in Generic Letter (GL) 83-11 Supplement 1, "Licensee Qualification for Performing Safety Analyses" (Ref. 7).
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Addendum 1 to WCAP-15306-NP-A Table 2-1 Applicable Range of ABB CHF Correlations Parameter ABB-NV Range ABB-TV Range Pressure (psia) 1750 to 2415 1500 to 2415 Local Mass Velocity (Mlbm/hr-ft 2 ) 0.8 to 3.16 0.9 to 3.40 Local Quality (Fraction) -0.14 to 0.22 -0.10 to 0.225 Heated Length, Inlet to CHF Location (in) 48 to 150 48 to 136.7 Grid Spacing (in) 8 to 18.86 8 to 18.86 Heated Hydraulic Diameter Ratio, Ahm/Ah 0.679 to 1.08 0.679 to 1.00 3
Addendum 1 to WCAP-15306-NP-A 3.0 Qualification of ABB-NV Correlation 3.1 ABB-NV Database The ABB-NV database used for the correlation development consists of approximately 530 ClF data points from twelve test sections in a 5x5 array simulating CE 14x14 and 16x16 fuel designs with non-mixing vane grids. The ABB-NV validation database consists of approximately 190 data points from additional four test sections. The test sections cover a range of heated lengths from 48 to 150 inches with different grid spacings, with uniform and non-uniform axial power shapes, with and without guide thimble tubes. The geometric characteristic of each test section is summarized in Table 3-1. A more detailed description of the test sections can be found in Reference 1.
3.2 ABB-NV Correlation The ABB-NV correlation is based on a linear relationship between CHF and local quality. The correlation includes the following variables: pressure, local mass velocity, local equilibrium quality, distance from grid to CHF location, heated length from inlet to CHF location, and heated hydraulic diameter of the subchannel. Special geometry terms are used in the correlation to correct CHF calculations for grid, heated length, heated diameter (cold wall effect) and guide tube effects. A modified Tong factor is applied to the ABB-NV CHF predictions to account for effects of non-uniform axial power distribution. The ABB-NV correlation has been used with the TORC code (Ref. 8) for CE-PWR licensing applications. The NRC-approved DNBR limit is 1.13 (Ref. 1) at a 95% probability and a 95% confidence level (95/95). A more detailed description of the ABB-NV correlation can be found in Reference 1.
3.3 VIPRE Model VIPRE calculations were performed with the entire ABB-NV database consisting of test data for the correlation development and validation. Similar to the TORC code, VIPRE was used for predicting local fluid condition at each axial node in each subchannel of a CBF test section. Local mass velocity and local quality are input to ABB-NV for a CHF calculation. A VIPRE model was prepared in the same way as the TORC model for each test section based on the geometry and power distribution of the rod 4
Addendum I to WCAP-15306-NP-A bundle. Representative VIPRE geometric models for the 14x14 and 16x16 fuel designs are shown in Figures 3-1 through 34. The VIPRE turbulent mixing correlation is the same as the TORC correlation:
w'=2 JIC where w'= Turbulent crossflow velocity, (Ibm/sec-ft) a, c The VIPRE two-phase flow and crossflow correlations are kept the same as that for Westinghouse PWR applications in Reference 2. The VIPRE model is summarized in Table 3-2 in comparison to the TORC model. The VIPRE calculations used the same measured values of pressure, inlet temperature, bundle average mass velocity and bundle average heat flux from the CHF tests as those used in the TORC calculations. The VIPRE/ABB-NV results for the entire database are listed in Appendix A.
3.4 Comparison with TORC Results Accuracy of CHF prediction is measured as the ratio of measured CHF to predicted CHF (M/P).
Table 3-3 shows means and standard deviations of VIPRE/ABB-NV M/P values for each test section, for the correlation database, the validation database and the entire database, as compared to the TORC/ABB-NV results from Reference 1. The VIPRE-based M/P value for each data point was deternined at the same location in the hot subchannel as the TORC-based value in Reference 1. The comparisons show that the VIPRE/ABB-NV M/P results are in good agreement with the original TORC values. A plot of measured CHF versus VIPRE/ABB-NV predicted CHF is also shown in Figure 3-5.
There is no bias in the CHF predictions observed in the scatter plots of VIPRE/ABB-NV M/P versus pressure, local mass velocity and local quality in Figures 3-6 through 3-8.
The number of VIPRE/ABB-NV data within the correlation range for several test sections is slightly different from the TORC-based database due to differences in local fluid conditions predicted by the codes. The overall VIPRE/ABB-NV database contains 718 data points, including an additional three data points that are within the applicable range of the ABB-NV correlation, as compared to 715 data points in the TORC/ABB-NV database. The statistical tests described in section 6.0 of Reference 1 were 5
Addendum 1 to WCAP-15306-NP-A applied to the VIPRE/ABB-NV database to determine the 95/95 DNBR limit for application of the ABB-NV correlation with the VIPRE code.
Based upon this analysis, the current 95/95 DNBR limit of 1.13 remains unchanged for ABB-NV application with the VIPRE code based on small differences observed in overall statistics given in Table3-3. The overall M/P is slightly higher for VIPRE/ABB-NV compared to TORC/ABB-NV resulting in an improvement in CHF performance; however the standard deviation is slightly higher. The difference in the M/P statistics has a negligible impact on the 95/95 DNBR limit. The M/P CHF ratio corresponding to the 1.13 DNBR limit is 0.885. For the entire VIPRE/ABB-NV database only nineteen data points fall below the value of 0.885, similar to the number of data points (eighteen) in the TORC/ABB-NV database below the limiting value. The similar comparison of the number of points below the limiting M/P value provides further support for using the same 95/95 DNBR limit.
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C C ( C (71 C C C(-C. C C C( C C C( C C (7 C C C,( ( ( C C(
Addendum 1 to WCAP-15306-NP-A Table 3-1 Geometric Characteristics of ABB-NV Correlation and Validation Tests Test No. Bundle Rod Rod Pitch Heated Grid Guide GT Axial Grid/Type Grid Array Diameter (in.) Length Spacing Tube Diameter Shape Material
. ____________ _____________ (in.) (in.) (in.) (in.)
Correlation Data a, b, c Validation Data b, 7
Addendum 1 to WCAP-15306-NP-A Table 3-2 Summary of VIPRE Model with ABB-NV in Comparison with TORC Model Input Parameter VIPRE TORC (Ref. 1)
Radial Channels Fig. 3-1 through 3-4 Fig. 3-1 through 34 I las be for HL = 48" Number of Axial Nodes I ] a,b.c for HL = 84" a,b,c for HL < 150" I a.bc for HL = 150" I ]b' cfor HL = 150" I Ca,c for Turbulent Mixing a. b,c a, b,c Turbulent Momentum Factor I I a, b, c 1, b, c Axial Friction Factor, f , b, c 2, b, c Crossflow Momentum Parameter [ a, b, c [a, b, c Crossflow Resistance Factor, K 1 bc a, b, c I 1ca,b,c I 1 a,b,c Average Grid Loss Coefficient, K I a,b,c a, b,c 1 a,b,c a,b,c Two-Phase Flow ,
Tra,c Two-Phase Flow Friction Multiplier [ J a, c . a, c 8
Addendum 1 to WCAP-15306-NP-A Figure 3-1 Typical Radial Geometry, ABB-NV Test For 21 Rods, 14x14 Geometry a, b, c 9
Addendum 1 to WCAP-15306-NP-A Figure 3-2 Typical Radial Geometry, ABB-NV Test For 25 Rods, 14x14 Geometry a,b,c 10
Addendum 1 to WCAP-15306-NP-A Figure 3-3 Typical Radial Geometry, ABB-NV Test For 21 Rods, 16x16 Geometry a, b, c 11
K)
K)
Addendum 1 to VCAP-15306-NP-A K)
Figure 3-4 Typical Radial Geometry, AEB-NV Test For 25 Rods, 16x16 Geometry a, b, c 12
Addendum 1 to WCAP-15306-NP-A Table 3-3 VIPRE and TORC M/P Comparison for ABB-NV Database Test VIPRE/ABB-NV TORC/ABB-NV (Ref.1)
Number N M/P Mean Std. Dev. N M/P Mean Std. Dev.
a, b, c
-t Entire Database 718 1.0105 0.0650 715 1.0044 0.0603 1,b,c
[. I~~ I ~~~~~~
-1 Smilar to the TORC database (Ref£1), I
. a,b.c 13
Addendum 1 to WCAP-15306-NP-A Figure 3-5 Measured CHF vs. VIPRE/ABB-NV Predicted CHF Measured and Predicted CHF for the ABB-NV Correlation Based on VIPRE Code 1.4 1.2 2 1 I-3 In 0.8 m
I:
z 55 0.6 0
0.4 0.2 0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 2
Predicted CHF, MBtulhrlf 14
Addendum 1 to WCAP-15306-NP-A Figure 3-6 VIPRE/ABB-NV M/P vs. Pressure Variation of the Ratio of Measured and Predicted CHF with Pressure for the ABB-NV Correlation Using VIPRE Code 1.5 1.4 EL 1.3
= .
U: 1.2 u
I-0 0 1.1 ax ;":t * $ t * % '
C 1
= 0.9 O 0.8 0 One-Sided
- Tolerance.95/95 mit
= 0.7 for DNBR95 of 1.13
- ABB-NV Database th VIPRE 0.6 0.5 I 1700 1800 1900 2000 2100 2200 2300 2400 2500 Pressure, psia 15
Addendum 1 to WCAP-15306-NP-A Figure 3-7 VIPRE/ABB-NV M/P vs. Local Mass Velocity Variation of the Ratio of Measured and Predicted CHF with Mass Velocity for the ABB-NV Correlation Using VIPRE Code 1.5 1.4 1.3 a-
.*~~~~~~~~~~~~~~~~~~~~~~.
I- 1.2 U
C, *:, .. : - . .',-- - ' -- - - -
7-, 1.1 a,: 1 a,
C 0.9 0
0 One-Sided 95/95 Tolerance Limit i: 0.7 ABB-NV Database with VIPRE for DNBR95of113 0.6 0.5 0.5 1 1.5 2 2.5 3 3.5 Local Mass Velocity, GL, Mlb/hr/ft 2 16
Addendum 1 to WCAP-15306-NP-A Figure 3-8 VIPRE/ABB-NV MIP vs. Local Quality Variation of the Ratio of Measured and Predicted CHF with Local Quality for the ABB-NV Correlation Using VIPRE Code 1.5 1.4 0 1.2 a.
0)
C 1 *
\ . .
- U U) 0.9 0.
2 One-ided 95195 Tolerance Limit W 0.7 for DNBR95 of 1.13 ABB-NV Database with ViPRE 0.6 n -4.
-0.25 -0.2 -0.15 -0.1 -0.0 5 0 0.05 0.1 0.15 0.2 0.25 Local Quality, XL 17
Addendum 1 to WCAP-15306-NP-A 4.0 Qualification of ABB-TV' Correlation 4.1 ABB-TV Database The ABB-TV database used for the correlation development consists of approximately 230 CHF data points from three test sections in a 6x6 array simulating CE 14x14 Turbo fuel design with mixing vane grids. The ABB-TV validation database consists of approximately 60 additional data points from the three test sections. The test sections contain heated rods with an outside diameter (OD) of 0.440 inch and a rod pitch of 0.580 inch, with uniforrn and non-uniform axial power shapes, with and without guide thimble tube. The geometric characteristic of each test section is summarized in Table 4-1. A more detailed description of the test sections can be found in Reference 1.
4.2 ABB-TV Correlation The ABB-TV correlation has the identical functional form as ABB-NV but with different coefficients for a portion of the correlation. It is also based on a linear relationship between CHF and local quality, similar to other Westinghouse correlations for fuel designs with mixing vane grids such as WRB-1 (Ref. 9). The same modified Tong factor for ABB-NV is applied to the ABB-TV CHF predictions to account for effects of non-uniform axial power distribution. The NRC-approved 95/95 DNBR limit is 1.13 (Ref. 1) for use with the TORC code. A more detailed description of the ABB-TV correlation can be found in Reference 1.
4.3 VIPRE Model VIPRE calculations were performed with the entire ABB-TV database consisting of test data for the correlation development and validation. A VIPRE model was prepared in the same way as the TORC model for each test section based on the geometry and power distribution of the rod bundle.
Representative VIPRE geometric models for the 14x14 Turbo fuel are shown in Figures 4-1 and 4-2. The VIPRE turbulent mixing correlation is the same as the TORC model. The VIPRE two-phase flow and crossflow correlations are the same as that for Westinghouse PWR applications as described in Reference 2. The VIPRE model is summarized in Table 4-2 in comparison to the TORC model. The VIPRE calculations used the same measured values of pressure, inlet temperature, bundle average mass velocity and bundle average heat flux from the CEF test as those used in the TORC calculations.
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( .('(
( ( ( (( ( ((( ( ( ( ( ( ( ( ( ( ( ( ( C( ( ( ( ( ( (( ( ( ( (
Addendum 1 to WCAP-15306-NP-A Table 4-1 Geometric Characteristics of ABB-TV Correlation and Validation Tests Test No. Bundle Rod Rod Pitch Heated Grid Guide GT Axial Grid/Type Grid Array Diameter (in.) Length Spacing Tube Diameter Shape Material (in.) (in.) (in.) (in.)
a, b, c
_ _ _ __I__ _ ____ I __
- Turbo Mixing Vane Grid 19
Addendum 1 to WCAP-15306-NP-A Table 4-2 Summary of VIPRE Model with ABB-TV in Comparison with TORC Model Input Parameter VIPRE TORC
.___ _ __ __ _ _ _ _ (Ref. 1)
Radial Channels Fig. 4-1 through 4-2 Fig. 4-1 through 4-2 a.b Cfor Tests 91 & 92 Number of Axial Nodes I1 b, for Test 93 I , b, I I for I a bxc (Test 91) Iab,c (Test 91)
Turbulent Mixing I 1 b,c (Tests 92 & 93) 1a b, c (Tests 92 & 93)
Turbulent Momentum Factor I ^ b,c a a,bc Axial Friction Factor, f I b,c 1 a,b, Crossflow Momentum Parameter [ I a bc a,b, c Crossflow Resistance Factor, K a1b c a,b, c Average Grid Loss Coefficient, K I ] ^ b, c for Test 91 ] 2 c for Test 91 (Vane Grids) (Vane Grids)
I ab, for Tests 92 & I b for Tests 92 &
93 (Vane Grids with Guide 93 (Vane Grids with Thimble Tube) Guide Thimble Tube)
] a bc for Test 93 1 b,c for Test 93 (Grid without vane) (Grid without vane)
Two-Phase Flow [ Ja,c R
Two-Phase Flow Friction Multiplier 1a, I a,c 20
Addendum 1 to WCAP-15306-NP-A Figure 4-1 Typical Radial Geometry, ABB-TV-Test For 32 Rods, 14x14 Geometry a, b, c VY
-I21
Addendum 1 to WCAP-15306-NP-A Figure 4-2 Typical Radial Geometry, ABB-TV-Test For 36 Rods, 14x14 Geometry a, b, c 22
Addendum 1 to WCAP-15306-NP-A 4.4 Comparison with TORC Results ABB-TV CHF predictions are based on the local fluid conditions calculated by the VIPRE code.
Table 4-3 shows means and standard deviations of VIPRE/ABB-TV MIP values for each test section, for the combined correlation and validation database, as compared to the TORC/ABB-TV results from Reference 1. The VIPRE-based M/P value for each data point was detennined at the same location in the hot subchannel as the TORC-based value in Reference 1. The comparisons show that the VIPRE/ABB-TV M/P results are in good agreement with the original TORC values. A plot of measured CHF versus VIPRE/ABB-TV predicted CHF is also shown in Figure 4-3. There is no bias in the CHF predictions observed in the scatter plots of VIPRE/ABB-TV M/P versus pressure, local mass velocity and local quality in Figures 44 through 4-6.
The overall VIPREIABB-TV database contains the same number of data points, 296, as the TORC/ABB-TV database in the applicable range of the ABB-TV correlation. The statistical tests described in section 6.0 of Reference 1 were applied to the VIPRE/ABB-TV database to determine the 95/95 DNBR limit for application of the ABB-TV correlation with the VIPRE code. Similar to the results with TORC, documented in Reference 1, the calculated 95/95 DNBR limit for ABB-TV correlation is lower than 1.13 based on the VIPRE results. As stated in Reference 1, the coefficients for the heated length, HL, and distance from grid, DG, exponential terms are based upon the data in the ABB-NV database. In addition, the optimization of the constants in the coefficient C of the non-uniform axial shape factor, Fc, was performed with non-uniform data from both the ABB-NV database and ABB-TV database. Since the form and results for the ABB-TV correlation rely heavily on the ABB-NV database, the 95/95 DNBR limit for the ABB-TV correlation is set to 1.13 (Ref. 1), the value determined for the ABB-NV correlation. The M/P CHF ratio is 0.885, corresponding to the DNBR limit of 1.13.
For the entire VIPREIABB-TV database only five data points fall below the value of 0.885, same as the number of data points in the TORC/ABB-TV database below the limiting value. Therefore, the current 95/95 DNBR limit of 1.13 is conservative and remains unchanged for ABB-TV application with the VIPRE code.
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Addendum 1 to WCAP-15306-NP-A Table 4-3 VIPRE and TORC M/P Comparison for ABB-TV Database Test VIPRE/ABB-TV TORCIABB-TV (Ref.1)
Number N T /P Mean Std. Dev. N MM Mean Std. Dev.
a, b,c
[ Entire Database 296 1.0099 0.0499 296 0.9996 0.0483 24
Addendum 1 to VCAP-15306-NP-A Figure 4-3 Measured CHF versus VIPRE/ABB-TV Predicted CHF Measured and Predicted CHF for the ABB-TV Correlation Using on VIPRE Code 1.2 1
2 L.
0.8 m
= 0.6 C.,
I..
0 0.4 0.2 0
0 0.2 0.4 0.6 0.8 1 1.2 Predicted CHF, MBtulhrlft2 25
Addendum to WCAP-15306-NP-A Figure 4-4 VIPRE/ABB-TV M/P versus Pressure Variation of the Ratio of Measured and Predicted CHF with Pressure for the ABB-TV Correlation Using VIPRE Code 1.5 1.4 E 1.3 LL
=
o 1.2
.)
r 1.1 a) 1 5
ci1 m
U) 0.9 *~ \
2 0.8 0 One-Sided 95/95 Tolerance Limit i 0.7 for DNBR95 of 1.13 ABB-TV Database with VIPRE 0.6 -
n r, I 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 Pressue, psia 26
Addendum 1 to WCAP-15306-NP-A Figure 4-5 VIPRE/ABB-TV M/P versus Local Mass Velocity Variation of the Ratio of Measured and Predicted CHF with Mass Velocity for the ABB-TV Correlation Using VIPRE Code 1.5 1.4 IA
° 1.3 I
=L) 1.2 r 1.1 CL a.
- 0 . *,'\N*'* *. " e * *4..'
.c 1-
=
w 0.9 ___________- - - - - - - - -v - - - - - -' - - - ;-- - - - - - - - - - - -- - - - - - - - - - - - - - - - -
4 0.8 0 One-ided a: 0.7 95/95 Tolerance Limit for DNBR95 of 1.1 3
- ABB-TV Database with VIPRE 0.6 0.5 0.5 1 1.5 2 2.5 3 3.5 4 Local Mass Velocity, GL, Mlb/hrIl 27
Addendum to WCAP-15306-NP-A Figure 4-6 VIPREIABB-TV M/P versus Local Quality Variation of the Ratio of Measured and Predicted CHF with Local Quality for the ABB-TV Correlation Using VIPRE Code 1.5 1.4 -
0.
E 1.3-IL:
z L-
- a. . . - ^ ... . ... ..- 3*a c
- ~~~~~ .
0 09 ax C
c
= 0.8 One-Sided 2 0.7 95/95 Tolerance Limit for DNBR95 of 1.1 3
- ABB-TV Database with VIPRE 0.6 -
0.5 _
-0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2 0.25 Local Quality, XL 28
Addendum 1 to WCAP-15306-NP-A 5.0 Conclusions The NRC-approved ABB CHF correlations were developed based on the TORC code. Westinghouse VIPRE code and model have been approved by the NRC for PWR licensing applications. Coupling the ABB correlations with the VIPRE code does not result in any change to the current NRC-approved methodology. This addendum demonstrates that VIPRE is equivalent to TORC for ABB-NV and ABB-TV DNBR calculations under the following conditions:
- 1) VIPRE model is consistent with that for the DNB data analysis described in this submittal;
- 2) The current 95/95 DNBR limit of 1.13 remains unchanged;
- 3) DNBR calculations for CE-PWR fuels are within the current applicable range defined in Table 2-1.
29
Addendum 1 to VCAP-15306-NP-A 6.0 References
- 1. "ABB Critical Heat Flux Correlations for PWR Fuel," CENPD-387-P-A, Rev.000, May 2000.
- 2. Sung. Y. X., et al., "VIPRE-01 Modeling and Qualification for Pressurized Water Reactor Non-LOCA Thermal-Hydraulic Safety Analysis," WCAP-15306-NP-A, October 1999.
- 3. Letter from C. E. Rossi (NRC) to J. A. Blaisdell (UGRA Executive Committee), "Acceptance for Referencing of Licensing Topical Report, EPRI NP-2511-CCM, 'VIPRE-01: A Thermal-Hydraulic Analysis Code for Reactor Cores,' Volumes.1, 2,3, and 4," May 1986.
- 4. Letter from A. C. Thadani (NRC) to Y. Y. Yung (VIPRE-01 Maintenance Group), "Acceptance for Referencing of Licensing Topical Report, EPRI NP-251 -CCM, Revision 3 'VIPRE-01: A Thermal-Hydraulic Analysis Code for Reactor Cores,' (TAC No. M79498)," October 1993.
- 5. Letter from T. H. Essig (NRC) to H. Sepp (Westinghouse), "Acceptance for Referencing of Licensing Topical Report WCAP-14565, 'VIPRE-01 Modeling and Qualification for Pressurized Water Reactor Non-LOCA Thermal-Hydraulic Safety Analysis,' (TAC No. M98666)," January 1999.
- 6. Letter from S. A. Richards (NRC) to I. C. Rickard (ABB-CE), "Acceptance for Referencing of CENPD-387-P, 'ABB Critical Heat Flux Correlations for PWR Fuel,' (TAC No. MA6109),"
March 2000.
- 7. United States Nuclear Regulatory Commission, Office of Nuclear Reactor Regulation, "NRC Generic Letter 83-11, Supplement 1, 'Licensee Qualification for Performing Safety Analysis',"
June 24, 1999.
- 8. "TORC Code, Verification and Simplified Modeling Methods," CENPD-206-P-A, June 1981.
- 9. Motley, et al., "New Westinghouse Correlation WRB-1 for Predicting Critical Heat Flux in Rod Bundles with Mixing Vane Grids," WCAP-8762-P-A (Proprietary) & WCAP-8763-A (Non-Proprietary), July 1984.
30
Addendum 1 to WCAP-15306-NP-A Appendix A VIPRE/ABB-NV Database A summary of the .VIPRE/ABB-NV database is shown in Table A-1. Nomenclature for heading abbreviations is defined below:
TS TD = Test Section, Test Section Type RUN = Test Run Number Pr= Pressure (psia)
GL = Local Mass Velocity in CHF Channel (Mlbm/hr-ft2 )
XL = Local Quality in CHF Channel (Fraction)
GS = Nominal Grid Spacing (inches)
HL = Heated Length to CHF Site (inches)
DG = Distance from last grid to CHF site (inches)
Dh = Heated Hydraulic Diameter of CHF Channel (inches)
Dhm = Heated Hydraulic Diameter of Matrix Channel (inches)
CHFM = Measured CHF (Mbtu/hr-ft2 )
CHFP = Predicted CHF (Mbtulhr-ft 2 )
M/P = Ratio of Measured CHF to Predicted CHF.
A-1
C (- CC C CC 'CC (-CC (-C;( C Cfc(( ('crC C (-C(. C (' (( ( CC Addendum I to WCAP-15306-NP-A Table A-I VIPRE/ABB-NV Database TS TD Rin Pr GL XL GS HL DG Dh Dhm CHFM CHFP M/P-1 M/P a, b, c A-2
C C'( ( C C Co 2(, C C (( >e C C( C ' C (C( C ( C.f Q c rCC C C CC C C C Addendtum 1 to WCAP-15306-NP-A TS TD Run Pr GL XL GS IL DG Dli Dhm CIIFM CHFP M/P-1 M/P . a, b, c A-3
C ( (C( C C CC ( ( ( ( ( ( C ( C( (C Q C C C (C ( ( ( (CC ( C Addendum 1 to WCAP-15306-NP-A TS TD Ruin Pr GL XL GS HL DG Dli Dhm CHFM CIIFP M/P-1 M/P a, b, c Fr 7 A-4
C C C c C((c ( C CCC ( Cc C C( ( C (C C C.(C C( Ct CC C C C Addenduim I to WCAP-15306-NP-A TS TD Rijn Pr GL XL GS H.L DG Dh Dhm CHFM CHFP M/P-l M/P ,bHD A-5
( CCC ( CCCCCCCC CCCC C C Ccc ( C ( C( ( (( (( C ( C(CC(
Addendum I to WCAP-15306-NP-A TS TD Run Pr GL XL GS HL DG Dh Dhm CHFM CHFP M/P-1 M/P a, b, c A-6
C ( ( CC C CC( C CC ( C( CC CC C CC CX( C C C C C C C C K,C C C (C ( (
Addendum I to WCAP-15306-NP-A TS TD Ruin Pr GL XL GS I-L DG Dh Dhm CIIFM CHFP MIP-l MIP a,b,c A-7
c ('C (( ( ( c C( C C CC ( C (C ( C C(( ( CC( ( ( C ( ( ( ( ( (
Addendum I to WCAP-15306-NP-A TS -TD Run Pr GL XL GS HL DG--
Di ---
Dhm CHFM CHFP M/P-1 M/P a, b, c A-8
c C CCC ( 0C( I C C C CC CI CC CC I C C C ( C c C C C C( CC CCC Addendum 1 to WCAP-15306-NP-A TS TD
...- - - -Run
- - - - -- - Pr
- - - - - - GL
- - - - -- - XL
- - - - - - -GS
- - - -- -HL
- - - - - -DG
- - - - -- - Dh
- - - - - - Dhm
- - - - -- CHFM
- - - - - - - CHFP
- - - - -- - M/P-1
- - - - - - - -M/P
- - a,b,c A-9
CCC CC C ' c C (C CC C C C C C C (K C (. C" C (( C C( ( C C Addendum 1 to WCAP-15306-NP-A TS TD Run Pr GL XL GS HL DG Dh Dhm CIIFM CIIFP M/P-1 M/P a, b, c A-10
C( ( C I ( cC ( ( C CI. CCC CC C , C C C (CE( ( CC C C C ( C( ( (
Addendum 1 to WCAP-15306-NP-A TS .-----
TD. .. .. Runi Pr GL XL GS IIL DG Dh Dhm CHFM CHFP M/P-1 M/P ............. a,b c A-11
cC C c (c C CC ( ( C( C CC CC C C COCE( C*Q C ( c (C C Addendum 1 to WCAP-15306-NP-A TS ---
TD-----
- Ruin-----
---- Pr----- ----- GL
---- XL
----- GS
---- IIL
----- DG
----- ---- Dh---------- Dhm
---- CHFM
----- CIIFP
---- M/P-1
----- ----- M/P
a, b, c A-12
( CC ( c (C c C( CC C C C C CC C C C( 0(6
(' ( ( cC (C'( ( ( CC C Addendum to WCAP-15306-NP-A TS TD Run Pr GL XL GS ilL DG Dh. Dhm CHFM CIIFP M/P-1 M/P a, b,c A-13
C C C C C (C C C ( C C C
- C CC C C C( C. C C
( ( ( ( ( ,( ( C Addendum 1 to WCAP-15306-NP-A TS TD----
Run Pr GL ----
XL GS HL ----
DG Dh Dhm CHFM CHFP M/P-1 M/P a, b, c A-14
( C CC C ( ( ( ( (VrC* ( ( ,(-( C C C ( C ( ('C c ( *( C( C C Addendum 1 to WCAP-15306-NP-A TS TD Run Pr GL XL GS HL DG Dh Dhm CHFM CHFP M/P-1 M/P ..... a, b, c A-15
C ( ( C ( ( ( C (I ( ( C( C ( ( C ( (d C ( C( ( ( (/((( (,( ( c C (C (( (C, C (>
Adden(um I to WCAP-15306-NP-A TS .....TD Run.
Pr GL XL GS .
lL DG Dh Dhm CHFM CIIFP M/P-1 M/P a, b, c A-16
CC (IC C C( ( C ( ( C (' CC 0("IC(C, ( (,( ( ( (C CC (
Addendtim 1 to WCAP-15306-NP-A TS TD Run Pr GL XL GS IIL DG Dh Dhm CHFM CHFP M/P-1 M/P a, b, c A-17
C(C, (: C (E ( ((C C C( ( C ( ( (((( ( (C (E ((I( C( (
Addendum I to WCAP-15306-NP-A TS TD Ruin Pr GL XL GS IIL DG Dh Dlhm CIFM CHFP M/P-1 M/P a, b, c A-18
( ( ('(;( (( ( ( (, C (C( ( ( ( ( (( ( ( ((( ( C C(C( ( (( C ( ('
Addendum I to WCAP-15306-NP-A TS TD Run Pr GL XL GS IL DG Dli Dhm CIIFM CIIFP M/P-1 M/P a, b, c A-19
C ( C( (( C C ( C, C C( ( (C
( ( ( C( ( ( ( ( ( C(_CC
( C CC ( (C( .( ( CC Addendum I to WCAP-15306-NP-A TS TD Run Pr GL XL GS HL DG Dii Dhm CHFM CHFP M/P-1 M/P a, b, c A-20
C(( C (C C CCCE C C CC (C C C C C( ( CC C C C ' C( CC C C CC C ( C Addendum 1 to WCAP-15306-NP-A TS TD Run Pr GL XL GS IIL DG Dli Dhm CHFM CHFP M/P-1 M/P , a, b, c A-21
( ( CC( ( C( C CC ( CC C C( ( I C C C CC C C ( ( ( (
CC (
Addendum 1 to WCAP-15306-NP-A TS TD Run Pr GL XL GS HL DG Dli Dhm CIIFM CIFP M/P-1 M/P a,b,c F 7 A-22
C ( C C ('C C C C CC ( ( C ( C( ( (
C CC C CC C cC (CcC ( ( ( C C ( C Addendum 1 to WCAP-15306-NP-A TS TD Run Pr --------- GL......... XL ----------------- GS HL DG-----
Dli Dhm CIIFM CHFP M/P-1 M/P ---~~~~~..a,..b, c A-23
CC ( - C (K-)
( ( C(C (C, ( ((( C CCC (v C (CC c (C (C ( (( (C Addendum to WCAP-1 5306-NP-A TS TD Ru!n Pr GL . XL GS HL DG Dli Dlim CIIFM CHFP M/P-1 M/P a, b,c A-24
C C ( ( ( (C C C C (C( ( C CC ( ( ( ( ( ( C C( C( ( ( ( C( ( ( ( ( C Addendum I to WCAP-15306-NP-A TS TD R..n Pr GL XL GS HL DG Dh Dhm CHFM CHFP M/P-1
. M/P... a,b,c A-25
Addendum 1 to WCAP-15306-NP-A Appendix B VIPRE/ABB-TV Database A summary of the -VIPRE/ABB-TV database is shown in Table B-1. Nomenclature for heading abbreviations is defined below:
TS TD = Test Section, Test Section Type RUN = Test Run Number Pr = Pressure (psia)
GL = Local Mass Velocity in CHF Channel (Mlbmhr-ft 2 )
XL = Local Quality in CHF Channel (Fraction)
GS = Nominal Grid Spacing (inches)
HL = Heated Length to CHF Site (inches)
DG = Distance from last grid to CHF site (inches)
Dh = Heated Hydraulic Diameter of CHF Channel (inches)
Dhm = Heated Hydraulic Diameter of Matrix Channel (inches)
CHFM = Measured CBF (Mbtu/hr-ft2 )
CHFP = Predicted CHF (Mbtu/hr-f 2 )
M/P = Ratio of Measured CF to Predicted CHF.
B-1
(CC (C((. ( ( ( (C(( CC ( ( (( (C (CC( ( (((C J (( CC( C Addendum 1 to WCAP-15306-NP-A Table B-i VIPRE/ABB-TV Database TS TD Run
= = : ---------
Pr C : ----------
GL XL GS ITL an- -------------
DG -------------
Dh ----------
Dhm CHFM CHFP M/P-1 M/P a, b, c B-2
(C ( C "C ( ( c ( ( C( ( CC (( ( ( ' (( ( ( ( ( ( - CC ( ( C ( C ( (
Addendum I to WCAP-15306-NP-A TS TD Ruin Pr GL XL GS HL DG Dh Dlim CHFM CHFP MIP-1 M/P a,b, B-3
C (C C C C C C ( ( C C C C C CCC C( CCC ( (( ( ( ( ( ( CC( ( ( ( ( C CC ( (
Addendum 1 to WCAP-15306-NP-A TS TD Run Pr GL XL -----
GS . . --- . IIL DG Dli Dlim CHFM CHFP M/P-1 M/P a, b c B-4
(( E.G C ((C (E (CC ( ( ( ( ( ( CC( ( ( ( ( ( ( ( ( (C ( ( ( ( (
Addendum to WCAP-1 5306-NP-A TS TD Ruin Pr GL XL GS IIL DG Di Dlhm CiIFM CHFP M/P-1 M/P a, b,c B-5
( ( ( ( ( C C C C C ( ( ( C C C ( ( ( ( C C ( C (
Ci C C (( C C (C C C C Addendum 1 to WCAP-15306-NP-A TS TD Run Pr GL --
XL GS HL DG Dli Dhm CHFM CIIFP M/P-1 M/P
. a, b, c B-6
c ( ( C Cc C( ( ( ( C C C( C( ( ( ( ( ( ( ( C (C (,C C( C( CC Addendum to WCAP-15306-NP-A TS TD Run Pr GL XL-------
GS HL DG Dh Dhm CHFM CIIFP M/P-1 M/P a, b,c B-7
C (( (( ( ( C C( ( ( ( ( ( ((( (. ( ( ( ( ( C (( CCC( C Addenduim I to WCAP-15306-NP-A TS TD Run Pr GL XL GS IIL DG Dh Dhm CHFM CHFP M/P-1 MIP a,b,c
- - ----- - -- - - -- - - - -- - - -- - - - -- - - -- - - - -- - - -- - - - -- - - -- - - - -- - - -- . . . . _$b B-8
C(CC ( (( CCC C C C C C( ((C(C(C '( ( ( ( C(CCC' CC (C C Addendum 1 to WCAP-15306-NP-A TS TD Rtn Pr GL XL..........................................
GS................................-
HL DG Dh Dlhm CHFM CHFP M/P-1 M/P a
B-9
C C ( ( ( (.(C c (C C Cf C C C C C ('C C C C CC
( ( C ( C (I( (( (( (
Addendum I to WCAP-15306-NP-A TS ........----
TD Run Pr GL . . . . .. --------XL GS HL DG Dh Dim . . . . CIIFM CHFP M/P -. -
M/P a b c B-10
C( ( ( ( ( ( (C ( ( ( ( (C C( c c C( CC( C CC( C( C C C C Addendtm I to WCAP-15306-NP-A TS TD---- ----
Ruin Pr ----
GL XL GS---- ---
HL DG ---
Dli Dium CHFM CHFP M/P-1 M/P----
a, b, c
_~~~~~~~~~~~~~~~~~~~~
B-lI