ML12284A185: Difference between revisions

From kanterella
Jump to navigation Jump to search
(Created page by program invented by StriderTol)
(StriderTol Bot change)
 
(3 intermediate revisions by the same user not shown)
Line 16: Line 16:


=Text=
=Text=
{{#Wiki_filter:ATTACHMENT 4 STEAM DRYER LIMIT CURVES (NON-PROPRIETARY)
{{#Wiki_filter:}}
The following non-proprietary Continuum Dynamics, Inc. (CDI) documents are Attachment, in the order listed: included in this Description
[ CDI Document No.0)Baseline 100% CLTP Limit Curves TN 12-13NP, Rev. 1 102.5% Limit Curves TM 12-18NP, Rev.0 Baseline 105% Limit Curves TN 12-14NP, Rev.0 105% Limit Curves for RCIC Steam Supply Isolation Valve Closed TN 12-23NP, Rev.0 107.5% Limit Curves TN 12-22NP, Rev.0 Baseline I110% Limit Curves TN 12-15NP, Rev.0 112.5% Limit Curves TN 12-24NP, Rev.0 Baseline 115% Limit Curves TN 12-16NP, Rev.0 Baseline Composite 115% and 110% (92.5Hz) Limit Curves TN 12-28NP, Rev.0 110% Limit Curves for RCIC Steam Supply Isolation Valve Closed TN 12-26NP, Rev.0 115% Limit Curves for RCIC Steam Supply Isolation Valve Closed TN 12-30NP, Rev.0 Note: (1) TN = Technical Note; TM = Technical Memorandum Certain information, considered proprietary by CDI, has been deleted Attachment.
The deletions are identified by double square brackets ([[ ]]).from the documents in this Nine Mile Point Nuclear Station, LLC September 26, 2012 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information C.D.I. Technical Note No. 12-13NP Limit Curves with ACM Rev. 4.1 for the 100% Power Level Basis at Nine Mile Point Unit 2 Revision 1 Prepared by Continuum Dynamics, Inc.34 Lexington Avenue Ewing, NJ 08618 Prepared under Purchase Order No. 4500428093 for Westinghouse Electric Company LLC Nuclear Services Business Unit 20 International Drive Windsor, CT 06095 Approved by Alan J. Bilanin Prepared by Milton E. Teske June 2012 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table of Contents Section Page T able of C ontents .....................................................................
ii 1. Introduction
............................................................................
1 2 .A pproach ...............................................................................
2 3. L im it C urves ..........................................................................
4 4. R eferences
.............................................................................
13 A ppendix ..............................................................................
14 ii This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 1. Introduction During power ascension of Nine Mile Point Unit 2 (NMP2), from Current Licensed Thermal Power (CLTP) to Extended Power Uprate (EPU), Nine Mile Point Nuclear Station, LLC (NMPNS) is required to monitor the dryer stresses at plant power levels that have not yet been achieved.
Limit curves provide an upper bound safeguard against the potential for dryer stresses becoming higher than allowable, by estimating the not-to-be-exceeded main steam line pressure levels. In the case of NMP2, in-plant main steam line data have been analyzed at 100%power conditions to provide steam dryer hydrodynamic loads. A real-time finite element model stress analysis has been undertaken on these loads at pre-selected dryer nodal locations.
These loads provide the basis for generation of the limit curves to be used during NMP2 power ascension.
Limit curves allow NMPNS to monitor dryer stress levels, by comparing the main steam line pressure readings -represented in Power Spectral Density (PSD) format -with the upper bound PSD derived from existing in-plant data.This technical note summarizes the limit curves generated from the 100% power data, utilizing Rev. 4.1 of the ACM [1].
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 2. Approach The limit curve analysis for NMP2, to be used during power ascension, is patterned after the approach followed by Entergy Vermont Yankee (VY) in its power uprate [2]. In the VY analysis, two levels of steam dryer performance criteria were described:
(1) a Level 1 pressure level based on maintaining the ASME allowable alternating stress value on the dryer, and (2) a Level 2 pressure level based on maintaining 80% of the allowable alternating stress value on the dryer. The VY approach is summarized in [3].To develop the limit curves for NMP2, the stress levels in the dryer were calculated for the current plant acoustic signature, and then used to determine how much the acoustic signature could be increased while maintaining stress levels below the stress fatigue limit. During power ascension, strain gage data will be converted to pressure in PSD format at each of the eight main steam line locations, for comparison with the limit curves. The strain gage data will be monitored throughout power ascension to observe the onset of discrete peaks, if they occur.The finite element analysis using the NMP2 100% power data found a lowest/minimum alternating stress ratio of 2.91, as summarized in Table 1 (this stress ratio can be compared to the ratio of 2.83 developed from the 2010 100% power data [4]). The minimum stress ratio includes the model bias and uncertainties for specific frequency ranges as summarized in [1]. The results of the ACM Rev. 4.1 analysis, based on Quad Cities Unit 2 in-plant data, are summarized in Table 2 (a negative bias is conservative).
The additional bias and uncertainties, as identified in[5], [6], [7], [8], [9], and [10], are shown in Table 3. SRSS of the uncertainties, added to the ACM bias, results in the total uncertainties shown in Table 4. These uncertainties were applied to the finite element analysis, resulting in the minimum stress ratio of 2.91 for ASME Level A load combinations (see the Appendix for stress ratios at selected dryer nodes).Table 1. Peak Stress Limit Summary for ACM Rev. 4.1 Peak Stress Limit 13,600 psi (Level 1) 10,880 psi (Level 2)Minimum Stress Ratio 2.91 2.33 2 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table 2. Bias and uncertainty for ACM Rev. 4.1 (3)]]1 Table 3. NMP2 additional uncertainties (with references cited)(3)]]1 Table 4. NMP2 total uncertainty (3)]]3 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 3. Limit Curves Limit curves were generated from the in-plant 100% power level strain gage data collected in June 2012. These data were filtered across the frequency ranges shown in Table 5 to remove noise and extraneous signal content. The resulting PSD curves for the eight strain gage locations were used to develop the limit curves, shown in Figures 1 to 4. Level 1 limit curves are found by multiplying the 100% power level main steam line pressure PSD traces by the square of the minimum alternating stress ratio, from Table 1, while the Level 2 limit curves are found by multiplying the 100% power level PSD traces by 0.64 of the square of the minimum alternating stress ratio, again from Table 1, as PSD is related to the square of the pressure.Figures 5 to 8 contain comparisons with the eight main steam line strain gage signals at 100% power, collected in 2010 [11].Table 5. Exclusion frequencies for NMP2 at 100% power Frequency Range (Hz) Exclusion Cause 0.0-2.0 Mean 59.9 -60.1 EMF Frequency 119.9 -120.1 EMF Frequency 179.8 -180.2 EMF Frequency 148.9 -149.3 Recirculation Vane Passing Frequency 4 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information R (3)]]Figure 1. Level 1 (black) and Level 2 (red) limit curves for main steam line A, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).5 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]Figure 2. Level 1 (black) and Level 2 (red) limit curves for main steam line B, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).6 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]1 Figure 3. Level 1 (black) and Level 2 (red) limit curves for main steam line C, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).7 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3) ]]Figure 4. Level 1 (black) and Level 2 (red) limit curves for main steam line D, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).8 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]Figure 5. Comparison between main steam line A pressure signals at 100% power, for 2010 data (black curves) and 2012 data (red curves), over the frequency range of interest: upper strain gage location (top); lower strain gage location (bottom).9 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]Figure 6. Comparison between main steam line B pressure signals at 100% power, for 2010 data (black curves) and 2012 data (red curves), over the frequency range of interest: upper strain gage location (top); lower strain gage location (bottom).10 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[I Figure 7. Comparison between main steam line C pressure signals at 100% power, for 2010 data (black curves) and 2012 data (red curves), over the frequency range of interest: upper strain gage location (top); lower strain gage location (bottom).11 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information I[[(3)]Figure 8. Comparison between main steam line D pressure signals at 100% power, for 2010 data (black curves) and 2012 data (red curves), over the frequency range of interest: upper strain gage location (top); lower strain gage location (bottom).12 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 4. References
: 1. Continuum Dynamics, Inc. 2011. ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements (Rev. 3). C.D.I. Report No. 10-09 (Proprietary).
: 2. Entergy Nuclear Northeast.
2006. Entergy Vermont Yankee Steam Dryer Monitoring Plan (Rev. 4). Docket 50-271. No. BVY 06-056. Dated 29 June 2006.3. State of Vermont Public Service Board. 2006. Petition of Vermont Department of Public Service for an Investigation into the Reliability of the Steam Dryer and Resulting Performance of the Vermont Yankee Nuclear Power Station under Uprate Conditions.
Docket No. 7195. Hearings held 17-18 August 2006.4. Continuum Dynamics, Inc. 2011. Stress Evaluation of Nine Mile Point Unit 2 Steam Dryer Using ACM Rev. 4.1 Acoustic Loads (Rev. 0). C.D.I. Report No. 11-04 (Proprietary).
: 5. Structural Integrity Associates, Inc. 2008. Nine Mile Point Unit 2 Strain Gage Uncertainty Evaluation and Pressure Conversion Factors (Rev. 1). SIA Calculation Package No. NMP-26Q-301.6. Continuum Dynamics, Inc. 2005. Vermont Yankee Instrument Position Uncertainty.
Letter Report Dated 01 August 2005.7. Exelon Nuclear Generating LLC. 2005. An Assessment of the Effects of Uncertainty in the Application of Acoustic Circuit Model Predictions to the Calculation of Stresses in the Replacement Quad Cities Units 1 and 2 Steam Dryers (Rev. 0). Document No. AM-21005-008.8. Continuum Dynamics, Inc. 2007. Finite Element Modeling Bias and Uncertainty Estimates Derived from the Hope Creek Unit 2 Dryer Shaker Test (Rev. 0). C.D.I. Report No. 07-27 (Proprietary).
: 9. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.79.10. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.110.11. Continuum Dynamics, Inc. 2010. Acoustic and Low Frequency Hydrodynamic Loads at CLTP Power Level on Nine Mile Point Unit 2 Steam Dryer to 250 Hz Using ACM Rev. 4.1 (Rev. 2). C.D.I. Report No. 10-10 (Proprietary).
: 12. Continuum Dynamics, Inc. 2012. Real-Time Monitoring of the Nine Mile Point Steam During Power Ascension (Rev. 0). C.D.I. Technical Note No. 12-17 (Proprietary).
13 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Appendix:
Real Time Nodal Analysis Results The minimum stress ratio behavior is shown in Figure 9. Note that to recover a minimum stress ratio of 210 at EPU conditions, the minimum stress ratio at CLTP conditions must be 2.Ox 1.17562= 2.764. The red curve connects the CLTP and EPU points.Nine Mile Point Power Ascension 3 0* ',2'-4]2.8 2.6 2.4 2.2 2 1 100 105 110 115% CLTP Power 120 Figure 9: Minimum stress ratio track through power ascension:
predicted dryer stress (black circle); minimum trend to EPU conditions (red line). EPU = 117.56% CLTP.The real-time stress analysis computes SR-P and SR-a summarized in Table analysis discussed in [12]. The minimum stress ratio location is shown in bold.6, based on the Table 6: Real-time stress ratios at 100% Power.Group(a) Node(b) Location SR-P SR-a AWl 95267 Hood Support/Outer Cover Plate / Outer Hood 1.967 3.160 AWl 95237 Outer Cover Plate / Outer Hood 5.194 2.945 AWl 95236 Outer Cover Plate / Outer Hood 5.156 2.925 AWl 95238 Outer Cover Plate / Outer Hood 5.308 2.995 AWl 95241 Outer Cover Plate / Outer Hood 5.347 3.028 AWl 95234 Outer Cover Plate / Outer Hood 5.283 2.992 AWl 95242 Outer Cover Plate / Outer Hood 5.376 3.086 AWl 95235 Outer Cover Plate / Outer Hood 5.282 3.013 AWl 99540 Hood Support / Inner Hood 6.169 3.487 AWl 99337 Hood Support / Outer Cover Plate / Outer Hood 3.040 3.199 14 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AWl 99104 Top Thick Plate / Top Plate / Inner Hood 7.414 3.874 AWl 85512 Top Thick Plate / Inner Hood / Top Plate 6.148 3.371 AWl 95233 Outer Cover Plate / Outer Hood 5.356 3.101 AW1 95243 Outer Cover Plate / Outer Hood 5.341 3.151 AWl 99541 Hood Support / Inner Hood 6.304 3.600 AWl 95232 Outer Cover Plate / Outer Hood 5.309 3.150 AWl 99539 Hood Support Inner Hood 6.417 3.609 AWl 98067 Hood Support / Outer Base Plate / Middle Backing Bar 2.274 3.282 AWl 99130 Top Thick Plate / Top Plate / Inner Hood 5.710 3.978 AWl 95645 Hood Support / Inner Hood 7.099 3.813 AWl 95646 Hood Support / Inner Hood 7.218 3.891 AWl 99115 Top Thick Plate / Top Plate / Inner Hood 6.608 3.998 AWl 99132 Top Thick Plate / Top Plate / Inner Hood 4.868 3.978 AWl 95657 Hood Support / Inner Hood 6.208 3.492 AWL 95643 Hood Support / Inner Hood 7.445 3.753 AWl 95644 Hood Support / Inner Hood 7.179 3.760 AWl 95428 Hood Support / Outer Base Plate / Middle Backing Bar 1.975 3.405 AWl 95642 Hood Support / Inner Hood 7.620 3.765 AWl 94626 Hood Support / Outer Cover Plate / Outer Hood 2.136 3.717 AWl 91091 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / End Plate 5.333 3.560 AWl 90170 Thick Vane Bank Plate / Thin Vane Bank Plate/ Side Plate / Side Plate Ext / End Plate 5.309 3.141 AWl 95658 Hood Support / Inner Hood 6.287 3.518 AWl 95246 Outer Cover Plate / Outer Hood 5.611 3.342 AWl 87478 Outer Cover Plate / Man Way Overlap 5.709 3.257 AWl 95641 Hood Support / Inner Hood 7.704 3.811 AWl 97693 Double Side Plate / Top Plate 4.299 3.466 AWl 95223 Outer Cover Plate / Outer Hood 5.554 3.322 AWl 91154 Entry Bottom Perf/ Side Plate / End Plate 5.365 3.868 AWl 85516 Top Thick Plate / Inner Hood / Top Plate 6.759 3.593 AWl 99122 Top Thick Plate / Top Plate / Inner Hood 7.519 4.127 AWl 89317 Closure Plate / Middle Hood 2.319 2.912 AWl 91155 Entry Bottom Perf/ Side Plate / End Plate 5.285 3.805 AWl 99123 Top Thick Plate / Top Plate / Inner Hood 7.172 4.149 AWl 99163 Top Thick Plate / Top Plate / Inner Hood 7.020 4.117 AWl 99131 Top Thick Plate / Top Plate / Inner Hood 5.959 4.161 AWl 93197 Double Side Plate / Top Plate 4.442 3.734 AWl 95617 Double Side Plate / Top Plate 4.654 3.440 AW2 91054 Side Plate / Top Plate 2.349 3.423 AW2 95638 Hood Support / Inner Hood 7.957 3.974 AW2 87633 Side Plate/ Brace 4.210 3.607 AW2 90947 Top Thick Plate / Middle Hood / Top Plate 5.859 3.501 AW2 95251 Outer Cover Plate / Outer Hood 5.966 3.519 15 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 102083 Hood Support / Inner Hood 7.839 4.086 AW2 96036 Hood Support / Middle Hood 7.162 4.136 AW2 90460 Hood Support / Inner Hood 8.017 4.545 AW2 85723 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 2.004 3.616 AW2 95632 Hood Support / Inner Hood 8.618 4.435 AW2 99456 Side Plate / Top Plate 2.700 3.592 AW2 94509 Outer End Plate / Outer Hood 6.071 3.632 AW2 95975 Closure Plate / Inner Hood 2.490 4.838 AW2 102707 Top Thick Plate / Inner Hood / Top Plate 7.121 4.171 AW2 85774 Hood Support / Outer Hood 8.837 4.539 AW2 96096 Top Thick Plate / Side Plate / Closure Plate 4.926 5.591 AW2 138250 Tie Bar 3.464 3.741 AW2 91215 Side Plate / Top Plate 1.895 3.620 AW2 101820 Entry Bottom Perf/ Side Plate / Outer End Plate 5.773 3.284 AW2 93348 End Plate / Inner Hood 3.712 4.452 AW2 100314 Thin Vane Bank Plate / Hood Support / Outer Base Plate 4.534 4.933 AW2 89650 Side Plate/ Brace 5.230 3.853 AW2 103080 Side Plate / Top Plate 3.750 3.325 AW2 91882 Hood Support / Middle Hood 7.185 3.899 AW2 96023 Hood Support / Middle Hood 8.979 5.016 AW2 90445 Hood Support / Inner Hood 8.600 4.731 AW2 85117 Double Side Plate / Top Plate 4.896 4.088 AW2 96132 End Plate / End Plate Ext 7.032 4.026 AW2 96111 End Plate / End Plate Ext 7.428 4.075 AW2 90812 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / Outer End Plate 5.024 4.263 AW2 94569 Outer End Plate / Outer Hood 8.076 4.566 AW2 84197 Middle Base Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 1.908 4.637 AW2 88718 Hood Support / Inner Hood 10.280 5.342 AW2 94523 Outer End Plate / Outer Hood 8.644 5.087 AW2 96017 Hood Support / Middle Hood 10.509 5.703 AW2 87492 Outer Cover Plate / Man Way Overlap 4.463 4.426 AW2 98968 Thin Vane Bank Plate / Hood Support / Middle Base Plate 2.314 4.125 AW2 99311 Hood Support / Outer Hood 9.556 4.748 AW2 87454 Outer Cover Plate / Man Way Overlap 6.215 4.952 AW2 95000 Hood Support / Outer Base Plate/Middle Backing Bar 3.023 4.997 AW2 99429 Hood Support / Middle Hood 9.011 4.940 AW2 88745 Side Plate / Brace 8.656 4.720 AW2 91616 Hood Support / Outer Hood 9.136 4.818 AW2 95264 Outer End Plate / Outer End Plate Ext 8.978 4.938 AW2 90419 Thin Vane Bank Plate / Hood Support / Inner Base Plate 3.864 4.468 AW2 95139 Submerged Drain Channel / Submerged Skirt 3.139 5.300 16 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 92984 Hood Support / Middle Base Plate / Inner Backing 5.137 Bar / Inner Hood 3.734 AW2 90508 Entry Bottom Perf/ Side Plate / End Plate 6.776 6.157 AW2 87784 Side Plate / Closure Plate / Exit Top Perf/ Exit Mid Top Perf 10.307 5.474 AW2 99207 Closure Plate / Middle Hood 10.678 5.393 AW2 92995 Thin Vane Bank Plate / Hood Support / Inner Base Plate 2.289 4.774 ANI 81316 Inner Hood 6.171 3.303 AN1 70703 Inner Hood 6.279 3.235 AN1 70645 Inner Hood 6.715 3.417 ANI 70588 Inner Hood 6.405 3.459 AN1 81346 Inner Hood 7.065 3.886 AN1 70672 Inner Hood 6.295 3.413 ANI 81341 Inner Hood 8.122 3.984 ANI 81332 Inner Hood 7.259 4.027 ANI 70653 Inner Hood 6.804 3.596 AN2 70582 Inner Hood 8.417 4.260 AN2 37724 Brace 6.177 4.635 AN2 30488 Middle Hood 8.378 4.329 AN2 34771 Middle Hood 7.983 4.026 AN2 70627 Inner Hood 9.276 4.756 AN2 72678 Inner Hood 9.841 5.002 AN2 34101 Middle Hood 10.178 5.188 AN2 70803 Inner Hood 10.008 5.079 AN2 70172 Inner Hood 9.397 5.011 PW 113554 Upper Support Ring Support Seismic Block 1.287 7.761 PW 94143 Side Plate Ext / Inner Base Plate 1.316 12.598 PW 143795 Tie Bar 1.528 6.505 PW 91558 Top Thick Plate / Side Plate / Closure Plate / Top Plate 2.232 5.900 PW 99200 Inner Side Plate / Inner Base Plate 1.691 9.059 PW 85191 Thin Vane Bank Plate / Hood Support / Inner Base Plate 1.849 4.568 PW 93062 Closure Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 2.751 10.274 PW 94498 Outer Cover Plate / Outer Hood 2.000 7.820 PW 90468 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 2.184 4.604 PW 113508 Upper Support Ring / Seismic Block / Support 2.476 12.624 PW 143757 Tie Bar 2.566 8.713 PW 95172 Closure Plate / Inner Hood 2.687 4.466 PW 100298 Thin Vane Bank Plate/Hood Support/Outer Base Plate 2.967 4.971 PW 99455 Side Plate / Top Plate 2.321 3.258 PN 37229 Inner Side Plate 2.213 18.794 XW 93709 Additional Points for Monitoring on Skirt Crack 5.456 9.960 XW 93046 Additional Points for Monitoring on Skirt Crack 6.010 10.766 17 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information XW 92992 Additional Points for Monitoring on Skirt Crack 5.119 9.053 XW 93710 Additional Points for Monitoring on Skirt Crack 6.177 9.928 Notes: a: The groups refer to the following categorizations based on the stress analysis in [4]: AWl -set of all nodes on a weld with alternating stress ratios SR-a < 3.5 AW2 -reduced point set (RPS) of nodes on a weld with alternating stress ratios, 3.5 < SR-a < 5.0 ANI -set of all nodes on a non-weld with alternating stress ratios SR-a < 3.5 AN2 -RPS of nodes on a non-weld with alternating stress ratios, 3.5 < SR-a < 5.0 PW -RPS of nodes on a weld with peak stress ratio, SR-P < 3.0 PN -RPS of nodes on a non-weld with peak stress ratio, SR-P < 3.0 XW -extra nodes selected for monitoring stresses near repaired indications on the skirt b: Node numbers correspond to node indices in the finite element model, for future reference 18 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information C.D.I. Technical Memorandum No. 12-18 Nine Mile Point Unit 2 Real Time Nodal Analysis Results at 102.5% Power Revision 0 Prepared by Continuum Dynamics, Inc.34 Lexington Avenue Ewing, NJ 08618 Prepared under Purchase Order No. 4500428093 for Westinghouse Electric Company LLC Nuclear Services Business Unit 20 International Drive Windsor, CT 06095 Approved by wa4-4~JaA.N Alan J. Bilanin Prepared by Milton E. Teske July 2012 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information The minimum stress ratio at 102.5% is 2.749 as shown in the figure below. Note that to recover a minimum stress ratio of 2.0 at EPU conditions, the minimum stress ratio at CLTP conditions must be 2.0x 1.17562 = 2.764. The red curve connects the CLTP and EPU points.Nine Mile Point Power Ascension 3 0 Coll Enj~(U ,!: 2.8 2.6 2.4 2.2 2 L 100 105 110 115% CLTP Power 120 Minimum stress ratio track through power ascension:
predicted dryer stresses (black circles);minimum trend to EPU conditions (red curve). EPU = 117.56% CLTP.The real-time stress analysis computes SR-P and SR-a as summarized in the table below. The minimum stress ratio location is shown in bold.Real-time stress ratios at 102.5% Power Group(') NodeI() Location SR-P SR-a AWl 95267 Hood Support/Outer Cover Plate / Outer Hood 2.040 3.082 AWl 95237 Outer Cover Plate / Outer Hood 5.821 3.480 AWl 95236 Outer Cover Plate / Outer Hood 5.824 3.460 AWl 95238 Outer Cover Plate / Outer Hood 5.914 3.537 AWl 95241 Outer Cover Plate / Outer Hood 5.944 3.594 AWl 95234 Outer Cover Plate / Outer Hood 6.066 3.510 AWl 95242 Outer Cover Plate / Outer Hood 6.015 3.694 AWl 95235 Outer Cover Plate / Outer Hood 5.993 3.574 AWl 99540 Hood Support / Inner Hood 5.396 3.048 AWl 99337 Hood Support / Outer Cover Plate / Outer Hood 2.898 3.271 AWl 99104 Top Thick Plate / Top Plate / Inner Hood 7.048 3.663 AWl 85512 Top Thick Plate / Inner Hood / Top Plate 5.787 3.128 AWl 95233 Outer Cover Plate / Outer Hood 6.213 3.632 2 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AWl 95243 Outer Cover Plate / Outer Hood 6.003 3.803 AWl 99541 Hood Support / Inner Hood 5.388 3.105 AWl 95232 Outer Cover Plate / Outer Hood 6.221 3.682 AWl 99539 Hood Support / Inner Hood 5.623 3.160 AWl 98067 Hood Support / Outer Base Plate / Middle Backing Bar 2.242 3.387 AWl 99130 Top Thick Plate / Top Plate / Inner Hood 5.820 3.754 AWl 95645 Hood Support / Inner Hood 6.710 3.659 AWl 95646 Hood Support / Inner Hood 6.709 3.719 AWl 99115 Top Thick Plate / Top Plate / Inner Hood 6.707 3.820 AWl 99132 Top Thick Plate / Top Plate / Inner Hood 5.005 3.811 AWl 95657 Hood Support / Inner Hood 7.134 3.983 AWl 95643 Hood Support / Inner Hood 7.122 3.802 AWl 95644 Hood Support / Inner Hood 6.900 3.704 AWl 95428 Hood Support / Outer Base Plate / Middle Backing Bar 2.019 3.605 AWl 95642 Hood Support / Inner Hood 7.435 3.744 AWl 94626 Hood Support / Outer Cover Plate / Outer Hood 2.043 3.372 AWl 91091 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / End Plate 5.104 3.383 AWl 90170 Thick Vane Bank Plate / Thin Vane Bank Plate/ Side Plate / Side Plate Ext / End Plate 5.200 3.071 AWl 95658 Hood Support / Inner Hood 7.023 4.068 AWl 95246 Outer Cover Plate / Outer Hood 6.305 4.055 AWl 87478 Outer Cover Plate / Man Way Overlap 6.589 4.080 AWl 95641 Hood Support / Inner Hood 7.490 3.726 AWl 97693 Double Side Plate / Top Plate 4.324 3.366 AWl 95223 Outer Cover Plate / Outer Hood 6.535 3.866 AWl 91154 Entry Bottom Perf/ Side Plate / End Plate 5.377 3.813 AWl 85516 Top Thick Plate / Inner Hood / Top Plate 6.345 3.387 AWl 99122 Top Thick Plate / Top Plate / Inner Hood 7.259 3.874 AWl 89317 Closure Plate / Middle Hood 2.320 2.749 AWl 91155 Entry Bottom Perf/ Side Plate / End Plate 5.279 3.679 AWl 99123 Top Thick Plate / Top Plate / Inner Hood 7.172 3.898 AWl 99163 Top Thick Plate / Top Plate / Inner Hood 6.816 3.950 AWl 99131 Top Thick Plate / Top Plate / Inner Hood 6.059 3.944 AWl 93197 Double Side Plate / Top Plate 4.141 3.313 AWl 95617 Double Side Plate / Top Plate 4.575 3.386 AW2 91054 Side Plate / Top Plate 2.239 3.114 AW2 95638 Hood Support / Inner Hood 7.494 3.805 AW2 87633 Side Plate/ Brace 3.992 3.422 AW2 90947 Top Thick Plate / Middle Hood / Top Plate 5.926 4.193 AW2 95251 Outer Cover Plate / Outer Hood 6.685 4.268 AW2 102083 Hood Support / Inner Hood 7.381 3.935 AW2 96036 Hood Support / Middle Hood 7.574 4.314 AW2 90460 Hood Support / Inner Hood 8.359 4.678 3 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 85723 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 1.956 3.743 AW2 95632 Hood Support / Inner Hood 7.984 4.242 AW2 99456 Side Plate / Top Plate 2.790 3.674 AW2 94509 Outer End Plate / Outer Hood 5.565 3.225 AW2 95975 Closure Plate / Inner Hood 2.504 4.860 AW2 102707 Top Thick Plate / Inner Hood / Top Plate 6.688 3.877 AW2 85774 Hood Support / Outer Hood 7.623 3.983 AW2 96096 Top Thick Plate / Side Plate / Closure Plate 4.874 5.056 AW2 138250 Tie Bar 3.612 3.974 AW2 91215 Side Plate / Top Plate 1.928 3.811 AW2 101820 Entry Bottom Perf/ Side Plate / Outer End Plate 6.825 3.457 AW2 93348 End Plate / Inner Hood 3.763 4.294 AW2 100314 Thin Vane Bank Plate / Hood Support / Outer Base Plate 4.242 4.663 AW2 89650 Side Plate Brace 5.311 3.976 AW2 103080 Side Plate / Top Plate 3.609 3.375 AW2 91882 Hood Support / Middle Hood 8.843 5.125 AW2 96023 Hood Support / Middle Hood 7.458 3.855 AW2 90445 Hood Support / Inner Hood 8.326 4.462 AW2 85117 Double Side Plate / Top Plate 5.167 4.057 AW2 96132 End Plate / End Plate Ext 7.216 4.224 AW2 96111 End Plate End Plate Ext 7.668 4.285 AW2 90812 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / Outer End Plate 5.143 3.904 AW2 94569 Outer End Plate / Outer Hood 8.127 4.401 AW2 84197 Middle Base Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 1.895 4.652 AW2 88718 Hood Support / Inner Hood 10.101 5.146 AW2 94523 Outer End Plate / Outer Hood 7.874 4.529 AW2 96017 Hood Support / Middle Hood 8.285 4.217 AW2 87492 Outer Cover Plate / Man Way Overlap 4.617 5.286 AW2 98968 Thin Vane Bank Plate / Hood Support / Middle Base Plate 2.350 5.037 AW2 99311 Hood Support / Outer Hood 10.680 5.411 AW2 87454 Outer Cover Plate / Man Way Overlap 6.267 5.493 AW2 95000 Hood Support / Outer Base Plate/Middle Backing Bar 3.006 5.705 AW2 99429 Hood Support / Middle Hood 8.388 4.528 AW2 88745 Side Plate / Brace 8.620 4.496 AW2 91616 Hood Support / Outer Hood 9.148 4.762 AW2 95264 Outer End Plate / Outer End Plate Ext 8.794 4.695 AW2 90419 Thin Vane Bank Plate / Hood Support / Inner Base Plate 3.964 4.368 AW2 95139 Submerged Drain Channel / Submerged Skirt 3.062 5.573 AW2 92984 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 3.667 5.310 AW2 90508 Entry Bottom Perf/ Side Plate / End Plate 6.977 6.511 4 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 87784 Side Plate / Closure Plate / Exit Top Perf/ Exit Mid Top Perf 10.203 5.239 AW2 99207 Closure Plate / Middle Hood 10.870 5.797 AW2 92995 Thin Vane Bank Plate / Hood Support / Inner Base Plate 2.277 4.832 ANI 81316 Inner Hood 6.020 3.270 ANI 70703 Inner Hood 6.125 2.997 ANI 70645 Inner Hood 6.469 3.310 AN1 70588 Inner Hood 6.137 3.287 ANI 81346 Inner Hood 6.917 3.797 AN 1 70672 Inner Hood 6.211 3.223 ANI 81341 Inner Hood 7.852 3.861 AN1 81332 Inner Hood 7.103 3.884 AN1 70653 Inner Hood 6.479 3.439 AN2 70582 Inner Hood 8.256 4.087 AN2 37724 Brace 6.002 4.434 AN2 30488 Middle Hood 8.061 4.236 AN2 34771 Middle Hood 10.175 5.038 AN2 70627 Inner Hood 8.786 4.310 AN2 72678 Inner Hood 8.825 4.532 AN2 34101 Middle Hood 11.109 5.896 AN2 70803 Inner Hood 9.310 4.793 AN2 70172 Inner Hood 8.781 4.701 PW 113554 Upper Support Ring / Support Seismic Block 1.261 6.798 PW 94143 Side Plate Ext / Inner Base Plate 1.320 13.431 PW 143795 Tie Bar 1.535 6.669 PW 91558 Top Thick Plate / Side Plate / Closure Plate / Top Plate 2.230 5.994 PW 99200 Inner Side Plate / Inner Base Plate 1.707 9.788 PW 85191 Thin Vane Bank Plate / Hood Support / Inner Base Plate 1.823 4.761 PW 93062 Closure Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 2.700 8.990 PW 94498 Outer Cover Plate / Outer Hood 1.990 7.609 PW 90468 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 2.095 5.046 PW 113508 Upper Support Ring / Seismic Block / Support 2.463 12.324 PW 143757 Tie Bar 2.554 9.040 PW 95172 Closure Plate / Inner Hood 2.683 4.279 PW 100298 Thin Vane Bank Plate/Hood Support/Outer Base Plate 2.852 4.613 PW 99455 Side Plate / Top Plate 2.378 3.355 PN 37229 Inner Side Plate 2.214 20.354 XW 93709 Additional Points for Monitoring on Skirt Crack 5.544 10.015 XW 93046 Additional Points for Monitoring on Skirt Crack 6.039 10.157 XW 92992 Additional Points for Monitoring on Skirt Crack 5.047 8.775 XW 93710 Additional Points for Monitoring on Skirt Crack 6.224 9.900 5 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Notes: a: The groups refer to the following categorizations based on the stress analysis at CLTP: AWl -set of all nodes on a weld with alternating stress ratios SR-a < 3.5 AW2 -reduced point set (RPS) of nodes on a weld with alternating stress ratios, 3.5 < SR-a < 5.0 ANI -set of all nodes on a non-weld with alternating stress ratios SR-a < 3.5 AN2 -RPS of nodes on a non-weld with alternating stress ratios, 3.5 < SR-a < 5.0 PW -RPS of nodes on a weld with peak stress ratio, SR-P < 3.0 PN -RPS of nodes on a non-weld with peak stress ratio, SR-P < 3.0 XW -extra nodes selected for monitoring stresses near repaired indications on the skirt b: Node numbers correspond to node indices in the finite element model, for future reference 6 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information C.D.I. Technical Note No. 1 2-14NP Limit Curves with ACM Rev. 4.1 for the 105% Power Level Basis at Nine Mile Point Unit 2 Revision 0 Prepared by Continuum Dynamics, Inc.34 Lexington Avenue Ewing, NJ 08618 Prepared under Purchase Order No. 4500428093 for Westinghouse Electric Company LLC Nuclear Services Business Unit 20 International Drive Windsor, CT 06095 Approved by Alan J. Bilanin Prepared by Milton E. Teske July 2012 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table of Contents Section Page T able of C ontents .....................................................................
ii 1. Introduction
............................................................................
1 2 .A pproach ...............................................................................
2 3. L im it C urves ..........................................................................
4 4 .R eferences
.............................................................................
9 A ppendix .............................................................................
10 11 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 1. Introduction During power ascension of Nine Mile Point Unit 2 (NMP2), from Current Licensed Thermal Power (CLTP) to Extended Power Uprate (EPU), Nine Mile Point Nuclear Station, LLC (NMPNS) is required to monitor the dryer stresses at plant power levels that have not yet been achieved.
Limit curves provide an upper bound safeguard against the potential for dryer stresses becoming higher than allowable, by estimating the not-to-be-exceeded main steam line pressure levels. In the case of NMP2, in-plant main steam line data have been analyzed at 105%power conditions to provide steam dryer hydrodynamic loads. A real-time finite element model stress analysis has been undertaken on these loads at pre-selected dryer nodal locations.
These loads provide the basis for generation of the limit curves to be used during NMP2 power ascension.
Limit curves allow NMPNS to monitor dryer stress levels, by comparing the main steam line pressure readings -represented in Power Spectral Density (PSD) format -with the upper bound PSD derived from existing in-plant data.This technical note summarizes the limit curves generated from the 105% power data, utilizing Rev. 4.1 of the ACM [1].
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 2. Approach The limit curve analysis for NMP2, to be used during power ascension, is patterned after the approach followed by Entergy Vermont Yankee (VY) in its power uprate [2]. In the VY analysis, two levels of steam dryer performance criteria were described:
(1) a Level 1 pressure level based on maintaining the ASME allowable alternating stress value on the dryer, and (2) a Level 2 pressure level based on maintaining 80% of the allowable alternating stress value on the dryer. The VY approach is summarized in [3].To develop the limit curves for NMP2, the stress levels in the dryer were calculated for the current plant acoustic signature, and then used to determine how much the acoustic signature could be increased while maintaining stress levels below the stress fatigue limit. During power ascension, strain gage data will be converted to pressure in PSD format at each of the eight main steam line locations, for comparison with the limit curves. The strain gage data will be monitored throughout power ascension to observe the onset of discrete peaks, if they occur.The finite element analysis using the NMP2 105% power data found a lowest/minimum alternating stress ratio of 2.65, as summarized in Table 1. The minimum stress ratio includes the model bias and uncertainties for specific frequency ranges as summarized in [1]. The results of the ACM Rev. 4.1 analysis, based on Quad Cities Unit 2 in-plant data, are summarized in Table 2 (a negative bias is conservative).
The additional bias and uncertainties, as identified in [4], [5],[6], [7], [8], and [9], are shown in Table 3. SRSS of the uncertainties, added to the ACM bias, results in the total uncertainties shown in Table 4. These uncertainties were applied to the finite element analysis, resulting in the minimum stress ratio of 2.65 for ASME Level A load combinations (see the Appendix for stress ratios at selected dryer nodes).Table 1. Peak Stress Limit Summary for ACM Rev. 4.1 Peak Stress Limit 13,600 psi (Level 1) 110,880 psi (Level 2)Minimum Stress Ratio 2.65 2.12 2 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table 2. Bias and uncertainty for ACM Rev. 4.1[[(3)]]Table 3. NMP2 additional uncertainties (with references cited)(3)]]Table 4. NMP2 total uncertainty (3)]]3 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 3. Limit Curves Limit curves were generated from the in-plant 105% power level strain gage data collected in June 2012. These data were filtered across the frequency ranges shown in Table 5 to remove noise and extraneous signal content. The resulting PSD curves for the eight strain gage locations were used to develop the limit curves, shown in Figures 1 to 4. Level 1 limit curves are found by multiplying the 105% power level main steam line pressure PSD traces by the square of the minimum alternating stress ratio, from Table 1, while the Level 2 limit curves are found by multiplying the 105% power level PSD traces by 0.64 of the square of the minimum alternating stress ratio, again from Table 1, as PSD is related to the square of the pressure.Table 5. Exclusion frequencies for NMP2 at 105% power Frequency Range (Hz) Exclusion Cause 0.0 -2.0 Mean 59.9 -60.1 EMF Frequency 119.6 -120.3 EMF Frequency 179.8 -180.2 EMF Frequency 148.9 -149.3 Recirculation Vane Passing Frequency 4 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information I[[(3)]Figure 1. Level 1 (black) and Level 2 (red) limit curves for main steam line A, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).5 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[I (3)]]Figure 2. Level 1 (black) and Level 2 (red) limit curves for main steam line B, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).6 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]Figure 3. Level 1 (black) and Level 2 (red) limit curves for main steam line C, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).7 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]Figure 4. Level 1 (black) and Level 2 (red) limit curves for main steam line D, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).8 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 4. References
: 1. Continuum Dynamics, Inc. 2011. ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements (Rev. 3). C.D.I. Report No. 10-09 (Proprietary).
: 2. Entergy Nuclear Northeast.
2006. Entergy Vermont Yankee Steam Dryer Monitoring Plan (Rev. 4). Docket 50-271. No. BVY 06-056. Dated 29 June 2006.3. State of Vermont Public Service Board. 2006. Petition of Vermont Department of Public Service for an Investigation into the Reliability of the Steam Dryer and Resulting Performance of the Vermont Yankee Nuclear Power Station under Uprate Conditions.
Docket No. 7195. Hearings held 17-18 August 2006.4. Structural Integrity Associates, Inc. 2008. Nine Mile Point Unit 2 Strain Gage Uncertainty Evaluation and Pressure Conversion Factors (Rev. 1). SIA Calculation Package No. NMP-26Q-301.5. Continuum Dynamics, Inc. 2005. Vermont Yankee Instrument Position Uncertainty.
Letter Report Dated 01 August 2005.6. Exelon Nuclear Generating LLC. 2005. An Assessment of the Effects of Uncertainty in the Application of Acoustic Circuit Model Predictions to the Calculation of Stresses in the Replacement Quad Cities Units 1 and 2 Steam Dryers (Rev. 0). Document No. AM-21005-008.7. Continuum Dynamics, Inc. 2007. Finite Element Modeling Bias and Uncertainty Estimates Derived from the Hope Creek Unit 2 Dryer Shaker Test (Rev. 0). C.D.I. Report No. 07-27 (Proprietary).
: 8. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.79.9. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.110.10. Continuum Dynamics, Inc. 2012. Real-Time Monitoring of the Nine Mile Point Steam During Power Ascension (Rev. 0). C.D.I. Technical Note No. 12-17 (Proprietary).
: 11. Continuum Dynamics, Inc. 2011. Stress Evaluation of Nine Mile Point Unit 2 Steam Dryer Using ACM Rev. 4.1 Acoustic Loads (Rev. 0). C.D.I. Report No. 11-04 (Proprietary).
9 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Appendix:
Real Time Nodal Analysis Results The minimum stress ratio at 105% is 2.654 as shown in Figure 5. Note that to recover a minimum stress ratio of 2.0 at EPU conditions, the minimum stress ratio at CLTP conditions must be 2.0x 1.17562 = 2.764. The red curve connects the CLTP and EPU points.Nine Mile Point Power Ascension 3 0 c(jU 2.8 2.6 2.4 2.2 0 0 115 100 105 110% CLTP Power 120 Figure 5: Minimum stress ratio track through power ascension:
predicted dryer stresses (black circles);
minimum trend to EPU conditions (red line). EPU = 117.56% CLTP.The real-time stress analysis computes SR-P and SR-a summarized in Table 6, based on the analysis discussed in [10]. The minimum stress ratio location is shown in bold.Table 6: Real-time stress ratios at 105% Power.Group(') Node(b) Location SR-P SR-a AWl 95267 Hood Support/Outer Cover Plate / Outer Hood 1.940 2.905 AWl 95237 Outer Cover Plate / Outer Hood 5.776 3.292 AWl 95236 Outer Cover Plate / Outer Hood 5.776 3.280 AWl 95238 Outer Cover Plate / Outer Hood 5.851 3.334 AWl 95241 Outer Cover Plate / Outer Hood 5.861 3.373 AWl 95234 Outer Cover Plate / Outer Hood 5.994 3.337 AWl 95242 Outer Cover Plate / Outer Hood 5.908 3.450 AWl 95235 Outer Cover Plate / Outer Hood 5.940 3.388 AWl 99540 Hood Support / Inner Hood 5.614 3.135 AWl 99337 Hood Support / Outer Cover Plate / Outer Hood 3.016 3.148 10 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AWl 99104 Top Thick Plate / Top Plate / Inner Hood 5.869 3.055 AW1 85512 Top Thick Plate / Inner Hood / Top Plate 5.776 3.172 AWl 95233 Outer Cover Plate / Outer Hood 6.121 3.451 AWl 95243 Outer Cover Plate / Outer Hood 5.880 3.538 AWl 99541 Hood Support / Inner Hood 5.719 3.191 AWl 95232 Outer Cover Plate / Outer Hood 6.098 3.499 AWl 99539 Hood Support / Inner Hood 5.857 3.298 AWl 98067 Hood Support / Outer Base Plate / Middle Backing Bar 2.206 3.310 AW1 99130 Top Thick Plate / Top Plate / Inner Hood 4.990 3.171 AWl 95645 Hood Support / Inner Hood 5.854 3.120 AWl 95646 Hood Support / Inner Hood 5.910 3.182 AWl 99115 Top Thick Plate / Top Plate / Inner Hood 5.617 3.167 AWl 99132 Top Thick Plate / Top Plate / Inner Hood 4.371 3.180 AWl 95657 Hood Support / Inner Hood 5.485 3.106 AWl 95643 Hood Support / Inner Hood 5.959 3.024 AWl 95644 Hood Support / Inner Hood 5.868 3.057 AWl 95428 Hood Support / Outer Base Plate / Middle Backing Bar 1.966 3.234 AWl 95642 Hood Support / Inner Hood 6.035 3.000 AWl 94626 Hood Support / Outer Cover Plate / Outer Hood 2.127 3.287 AWl 91091 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / End Plate 5.012 3.340 AW 1 90170 Thick Vane Bank Plate / Thin Vane Bank Plate/ Side Plate / Side Plate Ext / End Plate 5.436 3.288 AWl 95658 Hood Support / Inner Hood 5.545 3.175 AWl 95246 Outer Cover Plate / Outer Hood 6.166 3.764 AWl 87478 Outer Cover Plate / Man Way Overlap 6.413 3.763 AWl 95641 Hood Support / Inner Hood 6.027 2.999 AWl 97693 Double Side Plate / Top Plate 4.048 2.891 AWl 95223 Outer Cover Plate / Outer Hood 6.371 3.678 AWl 91154 Entry Bottom Perf/ Side Plate / End Plate 5.231 3.743 AWl 85516 Top Thick Plate / Inner Hood / Top Plate 6.380 3.355 AWl 99122 Top Thick Plate / Top Plate / Inner Hood 6.099 3.290 AWl 89317 Closure Plate / Middle Hood 2.286 2.654 AWl 91155 Entry Bottom Perf/ Side Plate / End Plate 5.203 3.623 AWl 99123 Top Thick Plate / Top Plate / Inner Hood 6.016 3.313 AWl 99163 Top Thick Plate / Top Plate / Inner Hood 5.688 3.266 AW1 99131 Top Thick Plate / Top Plate / Inner Hood 5.199 3.331 AWl 93197 Double Side Plate / Top Plate 4.034 3.027 AWl 95617 Double Side Plate / Top Plate 4.090 2.935 AW2 91054 Side Plate / Top Plate 2.239 2.979 AW2 95638 Hood Support / Inner Hood 6.128 3.046 AW2 87633 Side Plate / Brace 4.181 3.230 AW2 90947 Top Thick Plate / Middle Hood / Top Plate 6.013 3.710 AW2 95251 Outer Cover Plate / Outer Hood 6.551 3.963 11 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 102083 Hood Support / Inner Hood 7.125 3.642 AW2 96036 Hood Support / Middle Hood 7.321 3.971 AW2 90460 Hood Support / Inner Hood 7.453 4.240 AW2 85723 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 1.879 3.307 AW2 95632 Hood Support / Inner Hood 6.789 3.426 AW2 99456 Side Plate / Top Plate 2.676 3.368 AW2 94509 Outer End Plate / Outer Hood 5.604 3.301 AW2 95975 Closure Plate / Inner Hood 2.487 4.948 AW2 102707 Top Thick Plate / Inner Hood / Top Plate 6.649 3.908 AW2 85774 Hood Support / Outer Hood 7.762 3.853 AW2 96096 Top Thick Plate / Side Plate / Closure Plate 4.743 5.176 AW2 138250 Tie Bar 3.394 3.619 AW2 91215 Side Plate / Top Plate 1.855 2.986 AW2 101820 Entry Bottom Perf/ Side Plate / Outer End Plate 5.866 3.245 AW2 93348 End Plate / Inner Hood 3.786 4.190 AW2 100314 Thin Vane Bank Plate / Hood Support / Outer Base Plate 4.275 4.508 AW2 89650 Side Plate / Brace 5.149 3.962 AW2 103080 Side Plate / Top Plate 3.429 3.152 AW2 91882 Hood Support / Middle Hood 7.969 4.522 AW2 96023 Hood Support / Middle Hood 8.778 4.741 AW2 90445 Hood Support / Inner Hood 7.810 4.103 AW2 85117 Double Side Plate / Top Plate 4.769 3.781 AW2 96132 End Plate / End Plate Ext 7.281 4.376 AW2 96111 End Plate / End Plate Ext 7.698 4.422 AW2 90812 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / Outer End Plate 4.964 3.848 AW2 94569 Outer End Plate / Outer Hood 8.570 4.646 AW2 84197 Middle Base Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 1.874 3.853 AW2 88718 Hood Support / Inner Hood 8.623 4.412 AW2 94523 Outer End Plate / Outer Hood 7.566 4.219 AW2 96017 Hood Support / Middle Hood 10.044 5.304 AW2 87492 Outer Cover Plate / Man Way Overlap 4.572 4.932 AW2 98968 Thin Vane Bank Plate / Hood Support / Middle Base Plate 2.123 4.224 AW2 99311 Hood Support / Outer Hood 8.894 4.979 AW2 87454 Outer Cover Plate / Man Way Overlap 6.356 5.459 AW2 95000 Hood Support / Outer Base Plate/Middle Backing Bar 2.962 5.062 AW2 99429 Hood Support / Middle Hood 8.976 4.871 AW2 88745 Side Plate/ Brace 8.300 4.621 AW2 91616 Hood Support / Outer Hood 8.478 4.603 AW2 95264 Outer End Plate / Outer End Plate Ext 8.660 4.645 AW2 90419 Thin Vane Bank Plate / Hood Support Inner Base Plate 4.092 4.751 AW2 95139 Submerged Drain Channel / Submerged Skirt 3.088 5.166 12 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 92984 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 3.553 4.614 AW2 90508 Entry Bottom Perf/ Side Plate / End Plate 7.016 6.351 AW2 87784 Side Plate / Closure Plate / Exit Top Perf/ Exit Mid Top Perf 8.995 4.707 AW2 99207 Closure Plate / Middle Hood 9.736 5.262 AW2 92995 Thin Vane Bank Plate / Hood Support / Inner Base Plate 2.109 4.009 ANI 81316 Inner Hood 5.121 2.717 AN1 70703 Inner Hood 6.681 3.505 AN1 70645 Inner Hood 6.390 3.208 AN1 70588 Inner Hood 6.447 3.239 ANI 81346 Inner Hood 5.758 3.123 ANI 70672 Inner Hood 6.367 3.360 ANI 81341 Inner Hood 6.401 3.222 AN] 81332 Inner Hood 5.959 3.223 AN1 70653 Inner Hood 6.866 3.503 AN2 70582 Inner Hood 7.654 3.905 AN2 37724 Brace 5.472 4.002 AN2 30488 Middle Hood 7.699 4.098 AN2 34771 Middle Hood 9.375 4.638 AN2 70627 Inner Hood 9.695 4.814 AN2 72678 Inner Hood 10.079 4.982 AN2 34101 Middle Hood 9.062 4.835 AN2 70803 Inner Hood 9.378. 4.579 AN2 70172 Inner Hood 8.871 4.769 PW 113554 Upper Support Ring / Support / Seismic Block 1.274 7.249 PW 94143 Side Plate Ext / Inner Base Plate 1.310 10.657 PW 143795 Tie Bar 1.505 6.267 PW 91558 Top Thick Plate / Side Plate / Closure Plate / Top Plate 2.220 5.966 PW 99200 Inner Side Plate / Inner Base Plate 1.662 8.096 PW 85191 Thin Vane Bank Plate / Hood Support / Inner Base Plate 1.819 4.644 PW 93062 Closure Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 2.660 8.653 PW 94498 Outer Cover Plate / Outer Hood 1.967 7.112 PW 90468 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 2.143 4.490 PW 113508 Upper Support Ring / Seismic Block / Support 2.457 12.355 PW 143757 Tie Bar 2.515 8.328 PW 95172 Closure Plate / Inner Hood 2.613 4.390 PW 100298 Thin Vane Bank Plate/Hood Support/Outer Base Plate 2.969 4.863 PW 99455 Side Plate / Top Plate 2.309 3.097 PN 37229 Inner Side Plate 2.202 18.201 XW 93709 Additional Points for Monitoring on Skirt Crack 5.394 9.207 XW 93046 _Additional Points for Monitoring on Skirt Crack 5.812 9.495 13 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information XW 92992 Additional Points for Monitoring on Skirt Crack 4.961 8.347 XW 93710 Additional Points for Monitoring on Skirt Crack 6.008 9.452 Notes: a: The groups refer to the following categorizations based on the stress analysis in [11]: AWl -set of all nodes on a weld with alternating stress ratios SR-a < 3.5 AW2 -reduced point set (RPS) of nodes on a weld with alternating stress ratios, 3.5 < SR-a < 5.0 ANI -set of all nodes on a non-weld with alternating stress ratios SR-a < 3.5 AN2 -RPS of nodes on a non-weld with alternating stress ratios, 3.5 < SR-a < 5.0 PW -RPS of nodes on a weld with peak stress ratio, SR-P < 3.0 PN -RPS of nodes on a non-weld with peak stress ratio, SR-P < 3.0 XW -extra nodes selected for monitoring stresses near repaired indications on the skirt b: Node numbers correspond to node indices in the finite element model, for future reference 14 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information C.D.I. Technical Note No. 12-23NP Limit Curves with ACM Rev. 4.1 for the 105% Power Level Basis at Nine Mile Point Unit 2 with the Inboard RCIC Valve Closed Revision 0 Prepared by Continuum Dynamics, Inc.34 Lexington Avenue Ewing, NJ 08618 Prepared under Purchase Order No. 4500428093 for Westinghouse Electric Company LLC Nuclear Services Business Unit 20 International Drive Windsor, CT 06095 Approved by Alan J. Bilanin Prepared by Milton E. Teske July 2012 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table of Contents Section Page T able of C ontents .....................................................................
ii 1. In tro du ction ............................................................................
1 2 .A pproach ...............................................................................
2 3. L im it C urves ..........................................................................
4 4 .R eferences
.............................................................................
13 A ppendix .............................................................................
14 ii This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 1. Introduction During power ascension of Nine Mile Point Unit 2 (NMP2), from Current Licensed Thermal Power (CLTP) to Extended Power Uprate (EPU), Nine Mile Point Nuclear Station, LLC (NMPNS) is required to monitor the dryer stresses at plant power levels that have not yet been achieved.
Limit curves provide an upper bound safeguard against the potential for dryer stresses becoming higher than allowable, by estimating the not-to-be-exceeded main steam line pressure levels. In the case of NMP2, in-plant main steam line data have been analyzed at 105%power conditions to provide steam dryer hydrodynamic loads with the inboard RCIC valve closed. A real-time finite element model stress analysis has been undertaken on these loads at pre-selected dryer nodal locations.
These loads provide the basis for generation of the limit curves to be used during NMP2 power ascension.
Limit curves allow NMPNS to monitor dryer stress levels, by comparing the main steam line pressure readings -represented in Power Spectral Density (PSD) format -with the upper bound PSD derived from existing in-plant data.This technical note summarizes the limit curves generated from the 105% power data, utilizing Rev. 4.1 of the ACM [1].
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 2. Approach The limit curve analysis for NMP2, to be used during power ascension, is patterned after the approach followed by Entergy Vermont Yankee (VY) in its power uprate [2]. In the VY analysis, two levels of steam dryer performance criteria were described:
(1) a Level 1 pressure level based on maintaining the ASME allowable alternating stress value on the dryer, and (2) a Level 2 pressure level based on maintaining 80% of the allowable alternating stress value on the dryer. The VY approach is summarized in [3].To develop the limit curves for NMP2, the stress levels in the dryer were calculated for the current plant acoustic signature, and then used to determine how much the acoustic signature could be increased while maintaining stress levels below the stress fatigue limit. During power ascension, strain gage data will be converted to pressure in PSD format at each of the eight main steam line locations, for comparison with the limit curves. The strain gage data will be monitored throughout power ascension to observe the onset of discrete peaks, if they occur.The finite element analysis using the NMP2 105% power data with the inboard RCIC valve closed found a lowest/minimum alternating stress ratio of 2.45, as summarized in Table I (this stress ratio can be compared to the ratio of 2.65 developed from the 105% power data without closing the inboard RCIC valve [4]). The minimum stress ratio includes the model bias and uncertainties for specific frequency ranges as summarized in [1]. The results of the ACM Rev. 4.1 analysis, based on Quad Cities Unit 2 in-plant data, are summarized in Table 2 (a negative bias is conservative).
The additional bias and uncertainties, as identified in [5], [6], [7],[8], [9], and [10], are shown in Table 3. SRSS of the uncertainties, added to the ACM bias, results in the total uncertainties shown in Table 4. These uncertainties were applied to the finite element analysis, resulting in the minimum stress ratio of 2.45 for ASME Level A load combinations (see the Appendix for stress ratios at selected dryer nodes).Table 1. Peak Stress Limit Summary for ACM Rev. 4.1 Peak Stress Limit 13,600 psi (Level 1) 10,880 psi (Level 2)Minimum Stress Ratio 2.45 1.96 2 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table 2. Bias and uncertainty for ACM Rev. 4.1[[(3)]]Table 3. NMP2 additional uncertainties (with references cited)(3)]]Table 4. NMP2 total uncertainty (3)]]3 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 3. Limit Curves Limit curves were generated from the in-plant 105% power level strain gage data collected in July 2012 with the inboard RCIC valve closed. These data were filtered across the frequency ranges shown in Table 5 to remove noise and extraneous signal content. The resulting PSD curves for the eight strain gage locations were used to develop the limit curves, shown in Figures 1 to 4. Level 1 limit curves are found by multiplying the 105% power level main steam line pressure PSD traces by the square of the minimum alternating stress ratio, from Table 1, while the Level 2 limit curves are found by multiplying the 105% power level PSD traces by 0.64 of the square of the minimum alternating stress ratio, again from Table 1, as PSD is related to the square of the pressure.Figures 5 to 8 contain comparisons with the eight main steam line strain gage signals at 105% power without closing the inboard RCIC valve [4].Table 5. Exclusion frequencies for NMP2 at 105% power Frequency Range (Hz) Exclusion Cause 0.0 -2.0 Mean 59.9 -60.1 EMF Frequency 119.6 -120.3 EMF Frequency 179.8 -180.2 EMF Frequency 148.9 -149.3 Recirculation Vane Passing Frequency 4 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]1 Figure 1. Level 1 (black) and Level 2 (red) limit curves for main steam line A, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).5 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[I (3)]]Figure 2. Level 1 (black) and Level 2 (red) limit curves for main steam line B, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).6 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]Figure 3. Level 1 (black) and Level 2 (red) limit curves for main steam line C, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).7 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]Figure 4. Level 1 (black) and Level 2 (red) limit curves for main steam line D, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).8 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information I[[(3)]Figure 5. Comparison between main steam line A pressure signals at 105% power, for closure of the inboard RCIC valve (black curves) and the open valve (red curves), over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).9 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]Figure 6. Comparison between main steam line B pressure signals at 105% power, for closure of the inboard RCIC valve (black curves) and the open valve (red curves), over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).10 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3) ]]Figure 7. Comparison between main steam line C pressure signals at 105% power, for closure of the inboard RCIC valve (black curves) and the open valve (red curves), over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).11 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]1 Figure 8. Comparison between main steam line D pressure signals at 105% power, for closure of the inboard RCIC valve (black curves) and the open valve (red curves), over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).12 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 4. References
: 1. Continuum Dynamics, Inc. 2011. ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements (Rev. 3). C.D.I. Report No. 10-09 (Proprietary).
: 2. Entergy Nuclear Northeast.
2006. Entergy Vermont Yankee Steam Dryer Monitoring Plan (Rev. 4). Docket 50-271. No. BVY 06-056. Dated 29 June 2006.3. State of Vermont Public Service Board. 2006. Petition of Vermont Department of Public Service for an Investigation into the Reliability of the Steam Dryer and Resulting Performance of the Vermont Yankee Nuclear Power Station under Uprate Conditions.
Docket No. 7195. Hearings held 17-18 August 2006.4. Continuum Dynamics, Inc. 2012. Limit Curves with ACM Rev. 4.1 for the 105% Power Level Basis at Nine Mile Point Unit 2 (Rev. 0). C.D.I. Technical Note No. 12-14 (Proprietary).
: 5. Structural Integrity Associates, Inc. 2008. Nine Mile Point Unit 2 Strain Gage Uncertainty Evaluation and Pressure Conversion Factors (Rev. 1). SIA Calculation Package No. NMP-26Q-301.6. Continuum Dynamics, Inc. 2005. Vermont Yankee Instrument Position Uncertainty.
Letter Report Dated 01 August 2005.7. Exelon Nuclear Generating LLC. 2005. An Assessment of the Effects of Uncertainty in the Application of Acoustic Circuit Model Predictions to the Calculation of Stresses in the Replacement Quad Cities Units 1 and 2 Steam Dryers (Rev. 0). Document No. AM-21005-008.8. Continuum Dynamics, Inc. 2007. Finite Element Modeling Bias and Uncertainty Estimates Derived from the Hope Creek Unit 2 Dryer Shaker Test (Rev. 0). C.D.I. Report No. 07-27 (Proprietary).
: 9. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.79.10. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.110.11. Continuum Dynamics, Inc. 2012. Real-Time Monitoring of the Nine Mile Point Steam During Power Ascension (Rev. 0). C.D.I. Technical Note No. 12-17 (Proprietary).
13 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Appendix:
Real Time Nodal Analysis Results The minimum stress ratio at 105% is 2.452 as shown in Figure 9. Note that to recover a minimum stress ratio of 2.0 at EPU conditions, the minimum stress ratio at CLTP conditions must be 2.Ox 1.17562 = 2.764. The red curve connects the CLTP and EPU points.Nine Mile Point Power Ascension 3 0 r-S 2.8 2.6 2.4 2.2 2 1 100 105 110 115% CLTP Power 120 Figure 9: Minimum stress ratio track through power ascension:
predicted dryer stresses (black circles);
minimum trend to EPU conditions (red curve); predicted dryer stress for closure of the inboard RCIC valve (open black circle). EPU = 117.56% CLTP.The real-time stress analysis computes SR-P and SR-a summarized in Table 6, based on the analysis discussed in [ 11 ]. The minimum stress ratio location is shown in bold.Table 6: Real-time stress ratios at 105% Power.Group(') Node&deg;b) Location SR-P SR-a AWl 95267 Hood Support/Outer Cover Plate / Outer Hood 1.821 2.930 AWl 95237 Outer Cover Plate / Outer Hood 5.538 3.289 AWl 95236 Outer Cover Plate / Outer Hood 5.573 3.251 AWl 95238 Outer Cover Plate / Outer Hood 5.588 3.347 AWl 95241 Outer Cover Plate / Outer Hood 5.574 3.379 AWl 95234 Outer Cover Plate / Outer Hood 5.770 3.254 AWl 95242 Outer Cover Plate / Outer Hood 5.602 3.445 AWl 95235 Outer Cover Plate / Outer Hood 5.732 3.338 AWl 99540 Hood Support / Inner Hood 5.769 3.128 14 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AWl 99337 Hood Support / Outer Cover Plate / Outer Hood 2.726 2.960 AWl 99104 Top Thick Plate / Top Plate / Inner Hood 6.183 3.064 AWl 85512 Top Thick Plate / Inner Hood / Top Plate 5.576 3.035 AWl 95233 Outer Cover Plate / Outer Hood 5.882 3.334 AWl 95243 Outer Cover Plate / Outer Hood 5.566 3.523 AWl 99541 Hood Support / Inner Hood 5.857 3.178 AWl 95232 Outer Cover Plate / Outer Hood 5.863 3.353 AWl 99539 Hood Support / Inner Hood 5.905 3.269 AWl 98067 Hood Support / Outer Base Plate / Middle Backing Bar 2.204 2.982 AWl 99130 Top Thick Plate / Top Plate / Inner Hood 5.472 3.178 AWl 95645 Hood Support / Inner Hood 6.334 3.405 AWl 95646 Hood Support / Inner Hood 6.343 3.486 AW1 99115 Top Thick Plate / Top Plate / Inner Hood 6.043 3.194 AWl 99132 Top Thick Plate / Top Plate / Inner Hood 4.753 3.192 AWl 95657 Hood Support / Inner Hood 5.825 3.268 AWl 95643 Hood Support / Inner Hood 6.671 3.532 AWl 95644 Hood Support / Inner Hood 6.424 3.421 AWl 95428 Hood Support / Outer Base Plate / Middle Backing Bar 1.864 3.292 AWl 95642 Hood Support / Inner Hood 6.955 3.568 AWl 94626 Hood Support / Outer Cover Plate / Outer Hood 2.085 3.527 AWl 91091 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / End Plate 5.185 3.435 AWl 90170 Thick Vane Bank Plate / Thin Vane Bank Plate/ Side Plate / Side Plate Ext / End Plate 5.686 3.463 AWl 95658 Hood Support / Inner Hood 5.767 3.192 AWl 95246 Outer Cover Plate / Outer Hood 5.873 3.732 AWl 87478 Outer Cover Plate / Man Way Overlap 6.275 3.746 AWl 95641 Hood Support / Inner Hood 7.061 3.635 AWl 97693 Double Side Plate / Top Plate 4.043 2.989 AWl 95223 Outer Cover Plate / Outer Hood 6.174 3.500 AWl 91154 Entry Bottom Perf/ Side Plate / End Plate 5.386 3.996 AWl 85516 Top Thick Plate / Inner Hood / Top Plate 6.287 3.291 AWl 99122 Top Thick Plate / Top Plate / Inner Hood 6.007 3.304 AWl 89317 Closure Plate / Middle Hood 2.192 2.452 AWl 91155 Entry Bottom Perf/ Side Plate / End Plate 5.362 3.895 AWl 99123 Top Thick Plate / Top Plate / Inner Hood 6.201 3.312 AWl 99163 Top Thick Plate / Top Plate / Inner Hood 6.155 3.301 AW1 99131 Top Thick Plate / Top Plate / Inner Hood 5.789 3.318 AWl 93197 Double Side Plate / Top Plate 4.155 3.172 AWl 95617 Double Side Plate / Top Plate 4.420 3.192 AW2 91054 Side Plate / Top Plate 2.205 2.905 AW2 95638 Hood Support / Inner Hood 6.945 3.640 AW2 87633 Side Plate / Brace 3.375 2.838 AW2 90947 Top Thick Plate / Middle Hood / Top Plate 5.878 3.329 15 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 95251 Outer Cover Plate / Outer Hood 6.234 3.923 AW2 102083 Hood Support / Inner Hood 7.199 3.711 AW2 96036 Hood Support / Middle Hood 7.245 4.074 AW2 90460 Hood Support / Inner Hood 6.962 3.715 AW2 85723 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 1.945 3.275 AW2 95632 Hood Support / Inner Hood 6.822 3.607 AW2 99456 Side Plate / Top Plate 2.717 3.513 AW2 94509 Outer End Plate / Outer Hood 5.616 3.263 AW2 95975 Closure Plate / Inner Hood 2.468 4.612 AW2 102707 Top Thick Plate / Inner Hood / Top Plate 6.366 3.707 AW2 85774 Hood Support / Outer Hood 7.703 4.027 AW2 96096 Top Thick Plate / Side Plate / Closure Plate 4.730 5.200 AW2 138250 Tie Bar 3.182 3.435 AW2 91215 Side Plate / Top Plate 1.853 3.148 AW2 101820 Entry Bottom Perf/ Side Plate / Outer End Plate 6.423 3.534 AW2 93348 End Plate / Inner Hood 3.743 4.538 AW2 100314 Thin Vane Bank Plate / Hood Support / Outer Base Plate 4.114 4.491 AW2 89650 Side Plate / Brace 4.651 3.626 AW2 103080 Side Plate / Top Plate 3.363 3.016 AW2 91882 Hood Support / Middle Hood 7.609 4.105 AW2 96023 Hood Support / Middle Hood 7.906 4.380 AW2 90445 Hood Support / Inner Hood 7.935 4.261 AW2 85117 Double Side Plate / Top Plate 4.522 3.646 AW2 96132 End Plate / End Plate Ext 7.523 4.618 AW2 96111 End Plate / End Plate Ext 8.029 4.666 AW2 90812 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / Outer End Plate 4.667 3.749 AW2 94569 Outer End Plate / Outer Hood 8.143 4.251 AW2 84197 Middle Base Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 1.843 3.735 AW2 88718 Hood Support / Inner Hood 9.010 4.630 AW2 94523 Outer End Plate / Outer Hood 6.921 4.159 AW2 96017 Hood Support / Middle Hood 8.607 4.623 AW2 87492 Outer Cover Plate / Man Way Overlap 4.470 4.657 AW2 98968 Thin Vane Bank Plate / Hood Support / Middle Base Plate 2.251 4.374 AW2 99311 Hood Support / Outer Hood 9.247 4.678 AW2 87454 Outer Cover Plate / Man Way Overlap 6.146 5.218 AW2 95000 Hood Support / Outer Base Plate/Middle Backing Bar 2.905 4.990 AW2 99429 Hood Support / Middle Hood 8.969 4.656 AW2 88745 Side Plate / Brace 8.370 4.362 AW2 91616 Hood Support / Outer Hood 8.198 4.505 AW2 95264 Outer End Plate / Outer End Plate Ext 8.485 4.432 AW2 90419 Thin Vane Bank Plate / Hood Support / Inner Base Plate 3.867 4.144 16 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 95139 Submerged Drain Channel / Submerged Skirt 2.959 4.500 AW2 92984 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 3.571 4.408 AW2 90508 Entry Bottom Perf/ Side Plate / End Plate 6.821 5.834 AW2 87784 Side Plate / Closure Plate / Exit Top Perf/ Exit Mid Top Perf 10.596 5.226 AW2 99207 Closure Plate / Middle Hood 8.794 4.714 AW2 92995 Thin Vane Bank Plate / Hood Support / Inner Base Plate 2.309 4.821 AN1 81316 Inner Hood 5.339 2.778 ANI 70703 Inner Hood 5.960 3.034 ANI 70645 Inner Hood 6.291 3.148 ANI 70588 Inner Hood 6.021 3.166 ANI 81346 Inner Hood 6.112 3.233 ANI 70672 Inner Hood 5.967 3.145 ANI 81341 Inner Hood 6.702 3.307 ANI 81332 Inner Hood 6.331 3.371 ANI 70653 Inner Hood 6.272 3.301 AN2 70582 Inner Hood 7.871 3.896 AN2 37724 Brace 6.367 4.734 AN2 30488 Middle Hood 7.677 4.051 AN2 34771 Middle Hood 8.874 4.492 AN2 70627 Inner Hood 9.200 4.582 AN2 72678 Inner Hood 9.561 4.728 AN2 34101 Middle Hood 9.477 4.899 AN2 70803 Inner Hood 9.367 4.604 AN2 70172 Inner Hood 8.740 4.518 PW 113554 Upper Support Ring Support Seismic Block 1.267 6.683 PW 94143 Side Plate Ext / Inner Base Plate 1.311 9.616 PW 143795 Tie Bar 1.528 6.545 PW 91558 Top Thick Plate / Side Plate / Closure Plate / Top Plate 2.220 5.562 PW 99200 Inner Side Plate / Inner Base Plate 1.672 8.454 PW 85191 Thin Vane Bank Plate / Hood Support / Inner Base Plate 1.841 4.452 PW 93062 Closure Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 2.670 8.596 PW 94498 Outer Cover Plate / Outer Hood 1.953 6.419 PW 90468 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 2.051 4.416 PW 113508 Upper Support Ring / Seismic Block / Support 2.434 11.191 PW 143757 Tie Bar 2.525 8.001 PW 95172 Closure Plate / Inner Hood 2.580 3.970 PW 100298 Thin Vane Bank Plate/Hood Support/Outer Base Plate 2.886 4.654 PW 99455 Side Plate / Top Plate 2.316 3.054 PN 37229 Inner Side Plate 2.205 17.178 XW 93709 Additional Points for Monitoring on Skirt Crack 5.073 8.199 17 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information XW 93046 Additional Points for Monitoring on Skirt Crack 5.876 9.606 XW 92992 Additional Points for Monitoring on Skirt Crack 4.844 8.030 XW 93710 Additional Points for Monitoring on Skirt Crack 5.962 9.171 Notes: a: The groups refer to the following categorizations based on the stress analysis in [4]: AWl -set of all nodes on a weld with alternating stress ratios SR-a < 3.5 AW2 -reduced point set (RPS) of nodes on a weld with alternating stress ratios, 3.5 < SR-a < 5.0 AN1 -set of all nodes on a non-weld with alternating stress ratios SR-a < 3.5 AN2 -RPS of nodes on a non-weld with alternating stress ratios, 3.5 < SR-a < 5.0 PW -RPS of nodes on a weld with peak stress ratio, SR-P < 3.0 PN -RPS of nodes on a non-weld with peak stress ratio, SR-P < 3.0 XW -extra nodes selected for monitoring stresses near repaired indications on the skirt b: Node numbers correspond to node indices in the finite element model, for future reference 18 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information C.D.I. Technical Note No. 12-22NP Limit Curves with ACM Rev. 4.1 for the 107.5% Power Level Basis at Nine Mile Point Unit 2 Revision 0 Prepared by Continuum Dynamics, Inc.34 Lexington Avenue Ewing, NJ 08618 Prepared under Purchase Order No. 4500428093 for Westinghouse Electric Company LLC Nuclear Services Business Unit 20 International Drive Windsor, CT 06095 Approved by ,O-4-4 Alan J. Bilanin Prepared by Milton E. Teske July 2012 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table of Contents Section Page T able of C ontents .....................................................................
ii 1. Introduction
............................................................................
1 2. A pproach ...............................................................................
2 3. L im it C urves ..........................................................................
4 4 .R eferences
.............................................................................
9 A ppendix ..............................................................................
10 ii This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 1. Introduction During power ascension of Nine Mile Point Unit 2 (NMP2), from Current Licensed Thermal Power (CLTP) to Extended Power Uprate (EPU), Nine Mile Point Nuclear Station, LLC (NMPNS) is required to monitor the dryer stresses at plant power levels that have not yet been achieved.
Limit curves provide an upper bound safeguard against the potential for dryer stresses becoming higher than allowable, by estimating the not-to-be-exceeded main steam line pressure levels. In the case of NMP2, in-plant main steam line data have been analyzed at 107.5% power conditions to provide steam dryer hydrodynamic loads. A real-time finite element model stress analysis has been undertaken on these loads at pre-selected dryer nodal locations.
These loads provide the basis for generation of the limit curves to be used during NMP2 power ascension.
Limit curves allow NMPNS to monitor dryer stress levels, by comparing the main steam line pressure readings -represented in Power Spectral Density (PSD) format -with the upper bound PSD derived from existing in-plant data.This technical note summarizes the limit curves generated from the 107.5% power data, utilizing Rev. 4.1 of the ACM [1].
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 2. Approach The limit curve analysis for NMP2, to be used during power ascension, is patterned after the approach followed by Entergy Vermont Yankee (VY) in its power uprate [2]. In the VY analysis, two levels of steam dryer performance criteria were described:
(1) a Level 1 pressure level based on maintaining the ASME allowable alternating stress value on the dryer, and (2) a Level 2 pressure level based on maintaining 80% of the allowable alternating stress value on the dryer. The VY approach is summarized in [3].To develop the limit curves for NMP2, the stress levels in the dryer were calculated for the current plant acoustic signature, and then used to determine how much the acoustic signature could be increased while maintaining stress levels below the stress fatigue limit. During power ascension, strain gage data will be converted to pressure in PSD format at each of the eight main steam line locations, for comparison with the limit curves. The strain gage data will be monitored throughout power ascension to observe the onset of discrete peaks, if they occur.The finite element analysis using the NMP2 107.5% power data found a lowest/minimum alternating stress ratio of 2.49, as summarized in Table 1. The minimum stress ratio includes the model bias and uncertainties for specific frequency ranges as summarized in [1]. The results of the ACM Rev. 4.1 analysis, based on Quad Cities Unit 2 in-plant data, are summarized in Table 2 (a negative bias is conservative).
The additional bias and uncertainties, as identified in [4], [5],[6], [7], [8], and [9], are shown in Table 3. SRSS of the uncertainties, added to the ACM bias, results in the total uncertainties shown in Table 4. These uncertainties were applied to the finite element analysis, resulting in the minimum stress ratio of 2.49 for ASME Level A load combinations (see the Appendix for stress ratios at selected dryer nodes).Table 1. Peak Stress Limit Summary for ACM Rev. 4.1 Peak Stress Limit 113,600 psi (Level 1) 10,880 psi (Level 2)Minimum Stress Ratio 2.49 1.99 2 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table 2. Bias and uncertainty for ACM Rev. 4.1 Table 3. NMP2 additional uncertainties (with references cited)r[(3)]]Table 4. NMP2 total uncertainty (3)]]3 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 3. Limit Curves Limit curves were generated from the in-plant 107.5% power level strain gage data collected in July 2012. These data were filtered across the frequency ranges shown in Table 5 to remove noise and extraneous signal content. The resulting PSD curves for the eight strain gage locations were used to develop the limit curves, shown in Figures 1 to 4. Level 1 limit curves are found by multiplying the 107.5% power level main steam line pressure PSD traces by the square of the minimum alternating stress ratio, from Table 1, while the Level 2 limit curves are found by multiplying the 107.5% power level PSD traces by 0.64 of the square of the minimum alternating stress ratio, again from Table 1, as PSD is related to the square of the pressure.Table 5. Exclusion frequencies for NMP2 at 107.5% power Frequency Range (Hz) Exclusion Cause 0.0 -2.0 Mean 59.9-60.1 EMF Frequency 119.6 -120.3 EMF Frequency 179.8 -180.2 EMF Frequency 148.9 -149.3 Recirculation Vane Passing Frequency 4 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[I (3)]Figure 1. Level 1 (black) and Level 2 (red) limit curves for main steam line A, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).5 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)])1 Figure 2. Level 1 (black) and Level 2 (red) limit curves for main steam line B, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).6 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information I[[(3)]]Figure 3. Level 1 (black) and Level 2 (red) limit curves for main steam line C, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).7 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information I[[(3)]]Figure 4. Level 1 (black) and Level 2 (red) limit curves for main steam line D, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).8 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 4. References
: 1. Continuum Dynamics, Inc. 2011. ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements (Rev. 3). C.D.I. Report No. 10-09 (Proprietary).
: 2. Entergy Nuclear Northeast.
2006. Entergy Vermont Yankee Steam Dryer Monitoring Plan (Rev. 4). Docket 50-271. No. BVY 06-056. Dated 29 June 2006.3. State of Vermont Public Service Board. 2006. Petition of Vermont Department of Public Service for an Investigation into the Reliability of the Steam Dryer and Resulting Performance of the Vermont Yankee Nuclear Power Station under Uprate Conditions.
Docket No. 7195. Hearings held 17-18 August 2006.4. Structural Integrity Associates, Inc. 2008. Nine Mile Point Unit 2 Strain Gage Uncertainty Evaluation and Pressure Conversion Factors (Rev. 1). SIA Calculation Package No. NMP-26Q-301.5. Continuum Dynamics, Inc. 2005. Vermont Yankee Instrument Position Uncertainty.
Letter Report Dated 01 August 2005.6. Exelon Nuclear Generating LLC. 2005. An Assessment of the Effects of Uncertainty in the Application of Acoustic Circuit Model Predictions to the Calculation of Stresses in the Replacement Quad Cities Units 1 and 2 Steam Dryers (Rev. 0). Document No. AM-21005-008.7. Continuum Dynamics, Inc. 2007. Finite Element Modeling Bias and Uncertainty Estimates Derived from the Hope Creek Unit 2 Dryer Shaker Test (Rev. 0). C.D.I. Report No. 07-27 (Proprietary).
: 8. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.79.9. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.110.10. Continuum Dynamics, Inc. 2012. Real-Time Monitoring of the Nine Mile Point Steam During Power Ascension (Rev. 0). C.D.I. Technical Note No. 12-17 (Proprietary).
9 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Appendix:
Real Time Nodal Analysis Results The minimum stress ratio at 107.5% is 2.493 as shown in Figure 5. Note that to recover a minimum stress ratio of 2.0 at EPU conditions, the minimum stress ratio at CLTP conditions must be 2.Ox 1.17562 -2.764. The red curve connects the CLTP and EPU points.Nine Mile Point Power Ascension 3 0/C, 2.8 2.6 2.4 2.2 2 L 100 105 110 115% CLTP Power 120 Figure 5: Minimum stress ratio track through power ascension:
predicted dryer stresses (black circles);
minimum trend to EPU conditions (red curve). EPU = 117.56% CLTP.The real-time stress analysis computes SR-P and SR-a summarized in Table 6, based on the analysis approach discussed in [10]. The minimum stress ratio location is shown in bold.Table 6: Real-time stress ratios at 107.5% Power Group&#xfd;') Node(b) Location SR-P SR-a AWl 95267 Hood Support/Outer Cover Plate / Outer Hood 1.933 2.780 AWl 95237 Outer Cover Plate / Outer Hood 6.109 3.468 AWl 95236 Outer Cover Plate / Outer Hood 6.105 3.449 AWl 95238 Outer Cover Plate / Outer Hood 6.200 3.516 AWl 95241 Outer Cover Plate / Outer Hood 6.231 3.562 AWl 95234 Outer Cover Plate / Outer Hood 6.362 3.502 AWl 95242 Outer Cover Plate / Outer Hood 6.310 3.648 AWl 95235 Outer Cover Plate / Outer Hood 6.288 3.561 AWl 99540 Hood Support / Inner Hood 5.298 2.955 AWl 99337 Hood Support / Outer Cover Plate / Outer Hood 2.920 3.108 10 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AWl 99104 Top Thick Plate / Top Plate / Inner Hood 6.168 3.099 AWl 85512 Top Thick Plate / Inner Hood / Top Plate 5.453 2.948 AWl 95233 Outer Cover Plate / Outer Hood 6.380 3.621 AWl 95243 Outer Cover Plate / Outer Hood 6.250 3.747 AWl 99541 Hood Support / Inner Hood 5.474 3.050 AWl 95232 Outer Cover Plate / Outer Hood 6.281 3.671 AWl 99539 Hood Support / Inner Hood 5.443 3.043 AWl 98067 Hood Support / Outer Base Plate / Middle Backing Bar 2.162 3.266 AWl 99130 Top Thick Plate / Top Plate / Inner Hood 5.481 3.273 AWl 95645 Hood Support / Inner Hood 6.262 3.274 AWl 95646 Hood Support / Inner Hood 6.264 3.307 AWL 99115 Top Thick Plate / Top Plate / Inner Hood 5.819 3.213 AWl 99132 Top Thick Plate / Top Plate / Inner Hood 4.737 3.267 AWl 95657 Hood Support /Inner Hood 5.743 3.146 AWl 95643 Hood Support / Inner Hood 6.428 3.420 AWl 95644 Hood Support / Inner Hood 6.278 3.344 AWl 95428 Hood Support / Outer Base Plate / Middle Backing Bar 1.906 3.136 AWl 95642 Hood Support / Inner Hood 6.680 3.422 AWl 94626 Hood Support / Outer Cover Plate / Outer Hood 2.026 3.333 AWl 91091 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / End Plate 5.314 3.639 AWl 90170 Thick Vane Bank Plate / Thin Vane Bank Plate/ Side Plate / Side Plate Ext / End Plate 4.736 2.884 AWl 95658 Hood Support / Inner Hood 5.717 3.160 AWl 95246 Outer Cover Plate / Outer Hood 6.519 3.980 AWl 87478 Outer Cover Plate / Man Way Overlap 6.785 4.017 AWl 95641 Hood Support / Inner Hood 6.817 3.451 AWl 97693 Double Side Plate / Top Plate 3.949 2.941 AWl 95223 Outer Cover Plate / Outer Hood 6.521 3.857 AWl 91154 Entry Bottom Perf/ Side Plate / End Plate 5.484 3.998 AWl 85516 Top Thick Plate / Inner Hood / Top Plate 6.064 3.180 AWl 99122 Top Thick Plate / Top Plate / Inner Hood 6.415 3.422 AWl 89317 Closure Plate / Middle Hood 2.240 2.493 AW1 91155 Entry Bottom Perf/ Side Plate / End Plate 5.451 4.024 AWl 99123 Top Thick Plate I Top Plate / Inner Hood 6.641 3.421 AWl 99163 Top Thick Plate / Top Plate / Inner Hood 5.910 3.314 AWl 99131 Top Thick Plate / Top Plate / Inner Hood 5.686 3.394 AWl 93197 Double Side Plate / Top Plate 4.393 3.609 AWl 95617 Double Side Plate / Top Plate 4.412 3.169 AW2 91054 Side Plate / Top Plate 2.233 2.961 AW2 95638 Hood Support / Inner Hood 7.122 3.547 AW2 87633 Side Plate / Brace 3.729 3.069 AW2 90947 Top Thick Plate / Middle Hood / Top Plate 5.534 4.010 AW2 95251 Outer Cover Plate / Outer Hood 6.808 4.183 11 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 102083 Hood Support / Inner Hood 6.967 3.652 AW2 96036 Hood Support / Middle Hood 5.954 3.349 AW2 90460 Hood Support / Inner Hood 6.704 3.844 AW2 85723 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 1.926 2.940 AW2 95632 Hood Support / Inner Hood 7.090 3.822 AW2 99456 Side Plate / Top Plate 2.681 3.482 AW2 94509 Outer End Plate / Outer Hood 5.697 3.190 AW2 95975 Closure Plate / Inner Hood 2.501 4.486 AW2 102707 Top Thick Plate / Inner Hood / Top Plate 6.290 3.652 AW2 85774 Hood Support / Outer Hood 7.900 3.903 AW2 96096 Top Thick Plate / Side Plate / Closure Plate 4.684 4.585 AW2 138250 Tie Bar 3.147 3.347 AW2 91215 Side Plate / Top Plate 1.848 3.125 AW2 101820 Entry Bottom Perf/ Side Plate / Outer End Plate 6.859 3.763 AW2 93348 End Plate / Inner Hood 3.727 4.657 AW2 100314 Thin Vane Bank Plate / Hood Support / Outer Base Plate 4.248 4.404 AW2 89650 Side Plate / Brace 4.818 3.751 AW2 103080 Side Plate / Top Plate 3.481 3.013 AW2 91882 Hood Support/Middle Hood 8.682 5.031 AW2 96023 Hood Support / Middle Hood 7.811 4.079 AW2 90445 Hood Support / Inner Hood 8.170 4.211 AW2 85117 Double Side Plate / Top Plate 4.410 3.406 AW2 96132 End Plate / End Plate Ext 6.708 3.807 AW2 96111 End Plate / End Plate Ext 7.056 3.858 AW2 90812 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / Outer End Plate 4.613 3.748 AW2 94569 Outer End Plate / Outer Hood 6.859 3.824 AW2 84197 Middle Base Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 1.838 3.961 AW2 88718 Hood Support / Inner Hood 8.417 4.508 AW2 94523 Outer End Plate / Outer Hood 8.853 4.882 AW2 96017 Hood Support / Middle Hood 8.329 4.387 AW2 87492 Outer Cover Plate / Man Way Overlap 4.680 4.943 AW2 98968 Thin Vane Bank Plate / Hood Support / Middle Base Plate 2.241 4.234 AW2 99311 Hood Support / Outer Hood 9.141 4.685 AW2 87454 Outer Cover Plate / Man Way Overlap 6.580 5.630 AW2 95000 Hood Support / Outer Base Plate/Middle Backing Bar 2.965 4.753 AW2 99429 Hood Support / Middle Hood 9.617 5.036 AW2 88745 Side Plate / Brace 7.449 3.958 AW2 91616 Hood Support / Outer Hood 8.161 4.327 AW2 95264 Outer End Plate / Outer End Plate Ext 7.662 3.947 AW2 90419 Thin Vane Bank Plate / Hood Support / Inner Base Plate 3.627 3.990 AW2 95139 Submerged Drain Channel / Submerged Skirt 2.866 4.700 12 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 92984 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 3.493 4.146 AW2 90508 Entry Bottom Perf / Side Plate / End Plate 6.732 6.051 AW2 87784 Side Plate / Closure Plate / Exit Top Perf/ Exit Mid Top Perf 8.747 4.788 AW2 99207 Closure Plate / Middle Hood 7.753 3.971 AW2 92995 Thin Vane Bank Plate / Hood Support / Inner Base Plate 2.216 4.414 ANI 81316 Inner Hood 5.231 2.829 AN1 70703 Inner Hood 5.754 2.873 ANI 70645 Inner Hood 5.972 3.078 ANI 70588 Inner Hood 5.704 3.084 ANI 81346 Inner Hood 6.003 3.254 ANI 70672 Inner Hood 5.691 3.019 ANI 81341 Inner Hood 6.681 3.319 ANI 81332 Inner Hood 6.140 3.373 ANI 70653 Inner Hood 6.019 3.181 AN2 70582 Inner Hood 7.687 3.797 AN2 37724 Brace 5.466 4.089 AN2 30488 Middle Hood 7.450 3.729 AN2 34771 Middle Hood 10.588 5.531 AN2 70627 Inner Hood 8.416 4.306 AN2 72678 Inner Hood 8.967 4.475 AN2 34101 Middle Hood 9.172 4.812 AN2 70803 Inner Hood 9.009 4.480 AN2 70172 Inner Hood 8.357 4.392 PW 113554 Upper Support Ring / Support / Seismic Block 1.239 6.112 PW 94143 Side Plate Ext / Inner Base Plate 1.310 10.195 PW 143795 Tie Bar 1.490 5.781 PW 91558 Top Thick Plate / Side Plate / Closure Plate / Top Plate 2.181 5.238 PW 99200 Inner Side Plate / Inner Base Plate 1.677 8.395 PW 85191 Thin Vane Bank Plate / Hood Support / Inner Base Plate 1.781 4.109 PW 93062 Closure Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 2.660 9.039 PW 94498 Outer Cover Plate / Outer Hood 1.934 6.213 PW 90468 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 2.105 4.087 PW 113508 Upper Support Ring / Seismic Block / Support 2.420 11.013 PW 143757 Tie Bar 2.540 8.019 PW 95172 Closure Plate / Inner Hood 2.598 3.847 PW 100298 Thin Vane Bank Plate/Hood Support/Outer Base Plate 2.911 4.397 PW 99455 Side Plate / Top Plate 2.293 3.071 PN 37229 Inner Side Plate 2.196 18.934 XW 93709 Additional Points for Monitoring on Skirt Crack 5.382 9.328 XW 93046 Additional Points for Monitoring on Skirt Crack 5.950 9.836 13 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information XW 92992 I Additional Points for Monitoring on Skirt Crack 5.015 7.965 XW 93710 Additional Points for Monitoring on Skirt Crack 5.930 9.149 Notes: a: The groups refer to the following categorizations based on the stress analysis at CLTP: AWl -set of all nodes on a weld with alternating stress ratios SR-a < 3.5 AW2 -reduced point set (RPS) of nodes on a weld with alternating stress ratios, 3.5 < SR-a < 5.0 ANI -set of all nodes on a non-weld with alternating stress ratios SR-a < 3.5 AN2 -RPS of nodes on a non-weld with alternating stress ratios, 3.5 < SR-a < 5.0 PW -RPS of nodes on a weld with peak stress ratio, SR-P < 3.0 PN -RPS of nodes on a non-weld with peak stress ratio, SR-P < 3.0 XW -extra nodes selected for monitoring stresses near repaired indications on the skirt b: Node numbers correspond to node indices in the finite element model, for future reference 14 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information C.D.I. Technical Note No. 12-15NP Limit Curves with ACM Rev. 4.1 for the 110% Power Level Basis at Nine Mile Point Unit 2 Revision 0 Prepared by Continuum Dynamics, Inc.34 Lexington Avenue Ewing, NJ 08618 Prepared under Purchase Order No. 4500428093 for Westinghouse Electric Company LLC Nuclear Services Business Unit 20 International Drive Windsor, CT 06095 Approved by Oa.'4IJ Alan J. Bilanin Prepared by Milton E. Teske July 2012 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table of Contents Section Page T able of C ontents .....................................................................
ii 1. Introduction
............................................................................
1 2 .A pp roach ...............................................................................
2 3. L im it C urves ..........................................................................
4 4 .R eferences
.............................................................................
9 A ppendix .............................................................................
10 ii This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 1. Introduction During power ascension of Nine Mile Point Unit 2 (NMP2), from Current Licensed Thermal Power (CLTP) to Extended Power Uprate (EPU), Nine Mile Point Nuclear Station, LLC (NMPNS) is required to monitor the dryer stresses at plant power levels that have not yet been achieved.
Limit curves provide an upper bound safeguard against the potential for dryer stresses becoming higher than allowable, by estimating the not-to-be-exceeded main steam line pressure levels. In the case of NMP2, in-plant main steam line data have been analyzed at 110%power conditions to provide steam dryer hydrodynamic loads. A real-time finite element model stress analysis has been undertaken on these loads at pre-selected dryer nodal locations.
These loads provide the basis for generation of the limit curves to be used during NMP2 power ascension.
Limit curves allow NMPNS to monitor dryer stress levels, by comparing the main steam line pressure readings -represented in Power Spectral Density (PSD) format -with the upper bound PSD derived from existing in-plant data.This technical note summarizes the limit curves generated from the 110% power data, utilizing Rev. 4.1 of the ACM [1].
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 2. Approach The limit curve analysis for NMP2, to be used during power ascension, is patterned after the approach followed by Entergy Vermont Yankee (VY) in its power uprate [2]. In the VY analysis, two levels of steam dryer performance criteria were described:
(1) a Level 1 pressure level based on maintaining the ASME allowable alternating stress value on the dryer, and (2) a Level 2 pressure level based on maintaining 80% of the allowable alternating stress value on the dryer. The VY approach is summarized in [3].To develop the limit curves for NMP2, the stress levels in the dryer were calculated for the current plant acoustic signature, and then used to determine how much the acoustic signature could be increased while maintaining stress levels below the stress fatigue limit. During power ascension, strain gage data will be converted to pressure in PSD format at each of the eight main steam line locations, for comparison with the limit curves. The strain gage data will be monitored throughout power ascension to observe the onset of discrete peaks, if they occur.The finite element analysis using the NMP2 110% power data found a lowest/minimum alternating stress ratio of 2.40, as summarized in Table 1. The minimum stress ratio includes the model bias and uncertainties for specific frequency ranges as summarized in [1]. The results of the ACM Rev. 4.1 analysis, based on Quad Cities Unit 2 in-plant data, are summarized in Table 2 (a negative bias is conservative).
The additional bias and uncertainties, as identified in [4], [5],[6], [7], [8], and [9], are shown in Table 3. SRSS of the uncertainties, added to the ACM bias, results in the total uncertainties shown in Table 4. These uncertainties were applied to the finite element analysis, resulting in the minimum stress ratio of 2.40 for ASME Level A load combinations (see the Appendix for stress ratios at selected dryer nodes).Table 1. Peak Stress Limit Summary for ACM Rev. 4.1 Peak Stress Limit 13,600 psi (Level 1) 10,880 psi (Level 2)Minimum Stress Ratio 2.40 1.92 2 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table 2. Bias and uncertainty for ACM Rev. 4.1[1 (3)]]Table 3. NMP2 additional uncertainties (with references cited)(3)]]Table 4. NMP2 total uncertainty I[(3)]]3 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 3. Limit Curves Limit curves were generated from the in-plant 110% power level strain gage data collected in July 2012. These data were filtered across the frequency ranges shown in Table 5 to remove noise and extraneous signal content. The resulting PSD curves for the eight strain gage locations were used to develop the limit curves, shown in Figures 1 to 4. Level 1 limit curves are found by multiplying the 110% power level main steam line pressure PSD traces by the square of the minimum alternating stress ratio, from Table 1, while the Level 2 limit curves are found by multiplying the 110% power level PSD traces by 0.64 of the square of the minimum alternating stress ratio, again from Table 1, as PSD is related to the square of the pressure.Table 5. Exclusion frequencies for NMP2 at 110% power Frequency Range (Hz) Exclusion Cause 0.0 -2.0 Mean 59.9 -60.1 EMF Frequency 119.6 -120.3 EMF Frequency 179.8 -180.2 EMF Frequency 148.9 -149.3 Recirculation Vane Passing Frequency 4 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[Figure 1. Level 1 (black) and Level 2 (red) limit curves for main steam line A, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).5 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[1 (3)]]Figure 2. Level 1 (black) and Level 2 (red) limit curves for main steam line B, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).6 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]Figure 3. Level 1 (black) and Level 2 (red) limit curves for main steam line C, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).7 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3) ]]Figure 4. Level 1 (black) and Level 2 (red) limit curves for main steam line D, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).8 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 4. References
: 1. Continuum Dynamics, Inc. 2011. ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements (Rev. 3). C.D.I. Report No. 10-09 (Proprietary).
: 2. Entergy Nuclear Northeast.
2006. Entergy Vermont Yankee Steam Dryer Monitoring Plan (Rev. 4). Docket 50-271. No. BVY 06-056. Dated 29 June 2006.3. State of Vermont Public Service Board. 2006. Petition of Vermont Department of Public Service for an Investigation into the Reliability of the Steam Dryer and Resulting Performance of the Vermont Yankee Nuclear Power Station under Uprate Conditions.
Docket No. 7195. Hearings held 17-18 August 2006.4. Structural Integrity Associates, Inc. 2008. Nine Mile Point Unit 2 Strain Gage Uncertainty Evaluation and Pressure Conversion Factors (Rev. 1). SIA Calculation Package No. NMP-26Q-301.5. Continuum Dynamics, Inc. 2005. Vermont Yankee Instrument Position Uncertainty.
Letter Report Dated 01 August 2005.6. Exelon Nuclear Generating LLC. 2005. An Assessment of the Effects of Uncertainty in the Application of Acoustic Circuit Model Predictions to the Calculation of Stresses in the Replacement Quad Cities Units 1 and 2 Steam Dryers (Rev. 0). Document No. AM-21005-008.7. Continuum Dynamics, Inc. 2007. Finite Element Modeling Bias and Uncertainty Estimates Derived from the Hope Creek Unit 2 Dryer Shaker Test (Rev. 0). C.D.I. Report No. 07-27 (Proprietary).
: 8. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.79.9. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.110.10. Continuum Dynamics, Inc. 2012. Real-Time Monitoring of the Nine Mile Point Steam During Power Ascension (Rev. 0). C.D.I. Technical Note No. 12-17 (Proprietary).
: 11. Continuum Dynamics, Inc. 2011. Stress Evaluation of Nine Mile Point Unit 2 Steam Dryer Using ACM Rev. 4.1 Acoustic Loads (Rev. 0). C.D.I. Report No. 11-04 (Proprietary).
9 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Appendix:
Real Time Nodal Analysis Results The minimum stress ratio at 110% is 2.398 as shown in Figure 5. Note that to recover a minimum stress ratio of 2.0 at EPU conditions, the minimum stress ratio at CLTP conditions must be 2.Ox 1.17562 = 2.764. The red curve connects the CLTP and EPU points.Nine Mile Point Power Ascension 0 C4, rA 3 2.8 2.6 2.4 2.2 2 1 100 105 110 115% CLTP Power 120 Figure 5: Minimum stress ratio track through power ascension:
predicted dryer stresses (black circles);
minimum trend to EPU conditions (red curve). EPU = 117.56% CLTP.The real-time stress analysis computes SR-P and SR-a summarized in Table 6, based on the analysis discussed in [10]. The minimum stress ratio location is shown in bold.Table 6: Real-time stress ratios at 110% Power.Group(") Nodeib) Location SR-P SR-a AWl 95267 Hood Support/Outer Cover Plate / Outer Hood 1.842 2.469 AWl 95237 Outer Cover Plate / Outer Hood 4.738 2.881 AWl 95236 Outer Cover Plate / Outer Hood 4.744 2.874 AWl 95238 Outer Cover Plate / Outer Hood 4.794 2.939 AWl 95241 Outer Cover Plate / Outer Hood 4.802 2.972 AWl 95234 Outer Cover Plate / Outer Hood 4.967 2.997 AWl 95242 Outer Cover Plate / Outer Hood 4.846 3.042 AWl 95235 Outer Cover Plate / Outer Hood 4.889 2.969 AWl 99540 Hood Support / Inner Hood 4.760 2.717 AWl 99337 Hood Support / Outer Cover Plate / Outer Hood 2.850 2.837 10 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AWl 99104 Top Thick Plate / Top Plate / Inner Hood 5.704 2.946 AWl 85512 Top Thick Plate / Inner Hood / Top Plate 5.369 2.869 AWl 95233 Outer Cover Plate / Outer Hood 5.113 3.120 AWl 95243 Outer Cover Plate / Outer Hood 4.838 3.086 AWl 99541 Hood Support / Inner Hood 4.903 2.780 AWl 95232 Outer Cover Plate / Outer Hood 5.129 3.179 AWl 99539 Hood Support /Inner Hood 4.915 2.846 AWl 98067 Hood Support / Outer Base Plate / Middle Backing Bar 2.033 2.882 AWl 99130 Top Thick Plate / Top Plate / Inner Hood 5.315 2.975 AWl 95645 Hood Support / Inner Hood 5.289 2.787 AWl 95646 Hood Support / Inner Hood 5.317 2.829 AWl 99115 Top Thick Plate / Top Plate / Inner Hood 5.641 3.164 AWl 99132 Top Thick Plate / Top Plate / Inner Hood 4.550 3.006 AWl 95657 Hood Support / Inner Hood 5.563 3.018 AWl 95643 Hood Support / Inner Hood 5.596 2.844 AWl 95644 Hood Support / Inner Hood 5.400 2.821 AWl 95428 Hood Support / Outer Base Plate / Middle Backing Bar 1.886 3.162 AWl 95642 Hood Support / Inner Hood 5.798 2.875 AWl 94626 Hood Support / Outer Cover Plate / Outer Hood 1.974 2.971 AWl 91091 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / End Plate 4.978 3.348 AWl 90170 Thick Vane Bank Plate / Thin Vane Bank Plate/ Side Plate / Side Plate Ext / End Plate 4.427 2.583 AWl 95658 Hood Support / Inner Hood 5.473 3.016 AWl 95246 Outer Cover Plate / Outer Hood 5.122 3.321 AWl 87478 Outer Cover Plate / Man Way Overlap 5.283 3.178 AWl 95641 Hood Support / Inner Hood 5.897 2.918 AWl 97693 Double Side Plate / Top Plate 4.00 1 2.998 AWl 95223 Outer Cover Plate / Outer Hood 5.426 3.355 AWl 91154 Entry Bottom Perf/ Side Plate / End Plate 5.352 3.663 AWl 85516 Top Thick Plate / Inner Hood / Top Plate 5.986 3.086 AWl 99122 Top Thick Plate / Top Plate / Inner Hood 5.896 3.073 AWl 89317 Closure Plate / Middle Hood 2.237 2.535 AWl 91155 Entry Bottom Perf/ Side Plate / End Plate 5.262 3.655 AWl 99123 Top Thick Plate / Top Plate / Inner Hood 6.142 3.103 AWl 99163 Top Thick Plate / Top Plate / Inner Hood 5.765 3.277 AW1 99131 Top Thick Plate / Top Plate / Inner Hood 5.470 3.148 AWl 93197 Double Side Plate / Top Plate 4.303 3.462 AWl 95617 Double Side Plate / Top Plate 4.284 2.945 AW2 91054 Side Plate / Top Plate 2.183 2.828 AW2 95638 Hood Support / Inner Hood 6.249 3.112 AW2 87633 Side Plate / Brace 3.921 3.027 AW2 90947 Top Thick Plate / Middle Hood / Top Plate 5.157 2.860 AW2 95251 Outer Cover Plate / Outer Hood 5.448 3.496 11 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 102083 Hood Support / Inner Hood 6.290 3.276 AW2 96036 Hood Support / Middle Hood 5.707 3.245 AW2 90460 Hood Support / Inner Hood 6.948 3.743 AW2 85723 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 1.900 3.073 AW2 95632 Hood Support / Inner Hood 6.685 3.402 AW2 99456 Side Plate / Top Plate 2.595 3.080 AW2 94509 Outer End Plate / Outer Hood 5.736 3.286 AW2 95975 Closure Plate / Inner Hood 2.479 4.932 AW2 102707 Top Thick Plate / Inner Hood / Top Plate 6.267 3.594 AW2 85774 Hood Support / Outer Hood 8.102 4.061 AW2 96096 Top Thick Plate / Side Plate / Closure Plate 4.626 4.990 AW2 138250 Tie Bar 3.110 3.337 AW2 91215 Side Plate / Top Plate 1.855 3.387 AW2 101820 Entry Bottom Perf/ Side Plate / Outer End Plate 6.402 3.434 AW2 93348 End Plate / Inner Hood 3.636 4.215 AW2 100314 Thin Vane Bank Plate / Hood Support / Outer Base Plate 4.020 4.135 AW2 89650 Side Plate / Brace 5.058 3.680 AW2 103080 Side Plate / Top Plate 3.398 3.008 AW2 91882 Hood Support Middle Hood 7.192 4.130 AW2 96023 Hood Support I Middle Hood 7.978 4.285 AW2 90445 Hood Support / Inner Hood 6.983 3.879 AW2 85117 Double Side Plate / Top Plate 4.400 3.316 AW2 96132 End Plate / End Plate Ext 6.012 3.478 AW2 96111 End Plate / End Plate Ext 6.263 3.509 AW2 90812 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / Outer End Plate 4.632 3.673 AW2 94569 Outer End Plate / Outer Hood 6.992 3.868 AW2 84197 Middle Base Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 1.809 3.714 AW2 88718 Hood Support / Inner Hood 7.493 3.800 AW2 94523 Outer End Plate / Outer Hood 8.070 4.535 AW2 96017 Hood Support / Middle Hood 8.902 4.633 AW2 87492 Outer Cover Plate / Man Way Overlap 4.291 4.118 AW2 98968 Thin Vane Bank Plate / Hood Support / Middle Base Plate 2.186 4.134 AW2 99311 Hood Support / Outer Hood 9.030 4.563 AW2 87454 Outer Cover Plate / Man Way Overlap 5.717 4.439 AW2 95000 Hood Support / Outer Base Plate/Middle Backing Bar 2.673 4.586 AW2 99429 Hood Support / Middle Hood 7.916 4.111 AW2 88745 Side Plate/ Brace 7.737 4.374 AW2 91616 Hood Support / Outer Hood 8.535 4.490 AW2 95264 Outer End Plate / Outer End Plate Ext 8.222 4.367 AW2 90419 Thin Vane Bank Plate / Hood Support / Inner Base Plate 3.890 4.145 AW2 95139 Submerged Drain Channel / Submerged Skirt 2.936 4.650 12 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 92984 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 3.503 4.270 AW2 90508 Entry Bottom Perf/ Side Plate / End Plate 6.638 5.959 AW2 87784 Side Plate / Closure Plate / Exit Top Perf/ Exit Mid Top Perf 9.003 4.492 AW2 99207 Closure Plate / Middle Hood 9.714 5.036 AW2 92995 Thin Vane Bank Plate / Hood Support / Inner Base Plate 2.250 4.592 AN1 81316 Inner Hood 4.621 2.398 ANI 70703 Inner Hood 5.762 2.884 ANI 70645 Inner Hood 6.121 3.038 ANI 70588 Inner Hood 5.820 3.052 ANI 81346 Inner Hood 5.365 2.816 ANI 70672 Inner Hood 5.784 2.990 ANI 81341 Inner Hood 6.110 3.022 ANI 81332 InnerHood 5.503 2.911 ANI 70653 Inner Hood 6.152 3.153 AN2 70582 Inner Hood 7.604 3.763 AN2 37724 Brace 5.565 4.073 AN2 30488 Middle Hood 6.749 3.471 AN2 34771 Middle Hood 8.012 3.943 AN2 70627 Inner Hood 8.623 4.269 AN2 72678 Inner Hood 8.379 4.304 AN2 34101 Middle Hood 9.685 4.974 AN2 70803 Inner Hood 8.517 4.361 AN2 70172 Inner Hood 8.146 4.398 PW 113554 Upper Support Ring / Support / Seismic Block 1.250 6.119 PW 94143 Side Plate Ext / Inner Base Plate 1.305 11.177 PW 143795 Tie Bar 1.524 6.115 PW 91558 Top Thick Plate / Side Plate / Closure Plate / Top Plate 2.187 5.625 PW 99200 Inner Side Plate / Inner Base Plate 1.670 8.186 PW 85191 Thin Vane Bank Plate / Hood Support / Inner Base Plate 1.722 4.186 PW 93062 Closure Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 2.678 9.186 PW 94498 Outer Cover Plate / Outer Hood 1.918 6.486 PW 90468 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 2.031 4.346 PW 113508 Upper Support Ring / Seismic Block / Support 2.384 11.056 PW 143757 Tie Bar 2.471 7.259 PW 95172 Closure Plate / Inner Hood 2.617 4.071 PW 100298 Thin Vane Bank Plate/Hood Support/Outer Base Plate 2.752 3.968 PW 99455 Side Plate / Top Plate 2.216 2.835 PN 37229 Inner Side Plate 2.204 18.860 XW 93709 Additional Points for Monitoring on Skirt Crack 5.310 8.664 XW 93046 Additional Points for Monitoring on Skirt Crack 5.629 8.913 13 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information I XW I 92992 I Additional Points for Monitoring on Skirt Crack 4.891 7.440 XW 93710 Additional Points for Monitoring on Skirt Crack 5.906 9.002 Notes: a: The groups refer to the following categorizations based on the stress analysis at CLTP: AWl -set of all nodes on a weld with alternating stress ratios SR-a < 3.5 AW2 -reduced point set (RPS) of nodes on a weld with alternating stress ratios, 3.5 < SR-a < 5.0 ANI -set of all nodes on a non-weld with alternating stress ratios SR-a < 3.5 AN2 -RPS of nodes on a non-weld with alternating stress ratios, 3.5 < SR-a < 5.0 PW -RPS of nodes on a weld with peak stress ratio, SR-P < 3.0 PN -RPS of nodes on a non-weld with peak stress ratio, SR-P < 3.0 XW -extra nodes selected for monitoring stresses near repaired indications on the skirt b: Node numbers correspond to node indices in the finite element model, for future reference 14 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information C.D.I. Technical Note No. 12-24NP Limit Curves with ACM Rev. 4.1 for the 112.5% Power Level Basis at Nine Mile Point Unit 2 Revision 0 Prepared by Continuum Dynamics, Inc.34 Lexington Avenue Ewing, NJ 08618 Prepared under Purchase Order No. 4500428093 for Westinghouse Electric Company LLC Nuclear Services Business Unit 20 International Drive Windsor, CT 06095 Approved by W44-A Alan J. Bilanin Prepared by Milton E. Teske July 2012 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table of Contents Section Page T able of C ontents .....................................................................
ii 1. Introduction
............................................................................
1 2 .A pproach ...............................................................................
2 3. L im it C urves ..........................................................................
4 4. R eferences
.............................................................................
9 A ppendix ..............................................................................
10 ii This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 1. Introduction During power ascension of Nine Mile Point Unit 2 (NMP2), from Current Licensed Thermal Power (CLTP) to Extended Power Uprate (EPU), Nine Mile Point Nuclear Station, LLC (NMPNS) is required to monitor the dryer stresses at plant power levels that have not yet been achieved.
Limit curves provide an upper bound safeguard against the potential for dryer stresses becoming higher than allowable, by estimating the not-to-be-exceeded main steam line pressure levels. In the case of NMP2, in-plant main steam line data have been analyzed at 112.5% power conditions to provide steam dryer hydrodynamic loads. A real-time finite element model stress analysis has been undertaken on these loads at pre-selected dryer nodal locations.
These loads provide the basis for generation of the limit curves to be used during NMP2 power ascension.
Limit curves allow NMPNS to monitor dryer stress levels, by comparing the main steam line pressure readings -represented in Power Spectral Density (PSD) format -with the upper bound PSD derived from existing in-plant data.This technical note summarizes the limit curves generated from the 112.5% power data, utilizing Rev. 4.1 of the ACM [1].
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 2. Approach The limit curve analysis for NMP2, to be used during power ascension, is patterned after the approach followed by Entergy Vermont Yankee (VY) in its power uprate [2]. In the VY analysis, two levels of steam dryer performance criteria were described:
(1) a Level 1 pressure level based on maintaining the ASME allowable alternating stress value on the dryer, and (2) a Level 2 pressure level based on maintaining 80% of the allowable alternating stress value on the dryer. The VY approach is summarized in [3].To develop the limit curves for NMP2, the stress levels in the dryer were calculated for the current plant acoustic signature, and then used to determine how much the acoustic signature could be increased while maintaining stress levels below the stress fatigue limit. During power ascension, strain gage data will be converted to pressure in PSD format at each of the eight main steam line locations, for comparison with the limit curves. The strain gage data will be monitored throughout power ascension to observe the onset of discrete peaks, if they occur.The finite element analysis using the NMP2 112.5% power data found a lowest/minimum alternating stress ratio of 2.37, as summarized in Table 1. The minimum stress ratio includes the model bias and uncertainties for specific frequency ranges as summarized in [1]. The results of the ACM Rev. 4.1 analysis, based on Quad Cities Unit 2 in-plant data, are summarized in Table 2 (a negative bias is conservative).
The additional bias and uncertainties, as identified in [4], [5],[6], [7], [8], and [9], are shown in Table 3. SRSS of the uncertainties, added to the ACM bias, results in the total uncertainties shown in Table 4. These uncertainties were applied to the finite element analysis, resulting in the minimum stress ratio of 2.37 for ASME Level A load combinations (see the Appendix for stress ratios at selected dryer nodes).Table 1. Peak Stress Limit Summary for ACM Rev. 4.1 Peak Stress Limit 13,600 psi (Level 1) 10,880 psi (Level 2)Minimum Stress Ratio 2.37 1.90 2 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table 2. Bias and uncertainty for ACM Rev. 4.1 11 (3)]]Table 3. NMP2 additional uncertainties (with references cited)(3)]]Table 4. NMP2 total uncertainty Er (3)]]1 3 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 3. Limit Curves Limit curves were generated from the in-plant 112.5% power level strain gage data collected in July 2012. These data were filtered across the frequency ranges shown in Table 5 to remove noise and extraneous signal content. The resulting PSD curves for the eight strain gage locations were used to develop the limit curves, shown in Figures 1 to 4. Level 1 limit curves are found by multiplying the 112.5% power level main steam line pressure PSD traces by the square of the minimum alternating stress ratio, from Table 1, while the Level 2 limit curves are found by multiplying the 112.5% power level PSD traces by 0.64 of the square of the minimum alternating stress ratio, again from Table 1, as PSD is related to the square of the pressure.Table 5. Exclusion frequencies for NMP2 at 112.5% power Frequency Range (Hz) Exclusion Cause 0.0 -2.0 Mean 59.9 -60.1 EMF Frequency 119.6 -120.3 EMF Frequency 179.8 -180.2 EMF Frequency 148.9 -149.3 Recirculation Vane Passing Frequency 4 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]Figure 1. Level 1 (black) and Level 2 (red) limit curves for main steam line A, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).5 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[I (3)]Figure 2. Level 1 (black) and Level 2 (red) limit curves for main steam line B, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).6 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)j]Figure 3. Level 1 (black) and Level 2 (red) limit curves for main steam line C, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).7 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[I (3)]]Figure 4. Level 1 (black) and Level 2 (red) limit curves for main steam line D, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).8 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 4. References
: 1. Continuum Dynamics, Inc. 2011. ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements (Rev. 3). C.D.I. Report No. 10-09 (Proprietary).
: 2. Entergy Nuclear Northeast.
2006. Entergy Vermont Yankee Steam Dryer Monitoring Plan (Rev. 4). Docket 50-271. No. BVY 06-056. Dated 29 June 2006.3. State of Vermont Public Service Board. 2006. Petition of Vermont Department of Public Service for an Investigation into the Reliability of the Steam Dryer and Resulting Performance of the Vermont Yankee Nuclear Power Station under Uprate Conditions.
Docket No. 7195. Hearings held 17-18 August 2006.4. Structural Integrity Associates, Inc. 2008. Nine Mile Point Unit 2 Strain Gage Uncertainty Evaluation and Pressure Conversion Factors (Rev. 1). SIA Calculation Package No. NMP-26Q-301.5. Continuum Dynamics, Inc. 2005. Vermont Yankee Instrument Position Uncertainty.
Letter Report Dated 01 August 2005.6. Exelon Nuclear Generating LLC. 2005. An Assessment of the Effects of Uncertainty in the Application of Acoustic Circuit Model Predictions to the Calculation of Stresses in the Replacement Quad Cities Units I and 2 Steam Dryers (Rev. 0). Document No. AM-21005-008.7. Continuum Dynamics, Inc. 2007. Finite Element Modeling Bias and Uncertainty Estimates Derived from the Hope Creek Unit 2 Dryer Shaker Test (Rev. 0). C.D.I. Report No. 07-27 (Proprietary).
: 8. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.79.9. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.110.10. Continuum Dynamics, Inc. 2012. Real-Time Monitoring of the Nine Mile Point Steam During Power Ascension (Rev. 0). C.D.I. Technical Note No. 12-17 (Proprietary).
: 11. Continuum Dynamics, Inc. 2011. Stress Evaluation of Nine Mile Point Unit 2 Steam Dryer Using ACM Rev. 4.1 Acoustic Loads (Rev. 0). C.D.I. Report No. 11-04 (Proprietary).
9 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Appendix:
Real Time Nodal Analysis Results The minimum stress ratio at 112.5% is 2.373 as shown in Figure 5. Note that to recover a minimum stress ratio of 2.0 at EPU conditions, the minimum stress ratio at CLTP conditions must be 2.Ox 1.17562 = 2.764. The red curve connects the CLTP and EPU points.Nine Mile Point Power Ascension 3 0 0, 2.8 2.6 2.4 2.2 2 1 100 105 110 115% CLTP Power 120 Figure 5: Minimum stress ratio track through power ascension:
predicted dryer stresses (black circles);
minimum trend to EPU conditions (red curve). EPU = 117.56% CLTP.The real-time stress analysis computes SR-P and SR-a summarized in Table 6, based on the analysis approach discussed in [10]. The minimum stress ratio location is shown in bold.Table 6: Real-time stress ratios at 112.5% Power Group(a) Node"b) Location SR-P SR-a AWl 95267 Hood Support/Outer Cover Plate / Outer Hood 1.875 2.805 AWl 95237 Outer Cover Plate / Outer Hood 5.369 3.168 AWl 95236 Outer Cover Plate / Outer Hood 5.388 3.178 AWl 95238 Outer Cover Plate / Outer Hood 5.437 3.183 AWl 95241 Outer Cover Plate / Outer Hood 5.446 3.189 AWl 95234 Outer Cover Plate / Outer Hood 5.636 3.218 AWl 95242 Outer Cover Plate / Outer Hood 5.495 3.222 AWl 95235 Outer Cover Plate / Outer Hood 5.555 3.275 AWl 99540 Hood Support / Inner Hood 5.739 3.231 AWl 99337 Hood Support / Outer Cover Plate / Outer Hood 2.925 3.081 10 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AWl 99104 Top Thick Plate / Top Plate / Inner Hood 5.371 2.749 AWl 85512 Top Thick Plate / Inner Hood / Top Plate 5.442 2.880 AWl 95233 Outer Cover Plate / Outer Hood 5.743 3.300 AWl 95243 Outer Cover Plate / Outer Hood 5.476 3.265 AWl 99541 Hood Support / Inner Hood 5.864 3.294 AWl 95232 Outer Cover Plate / Outer Hood 5.722 3.322 AWl 99539 Hood Support / Inner Hood 5.978 3.371 AWl 98067 Hood Support / Outer Base Plate / Middle Backing Bar 2.169 2.769 AWl 99130 Top Thick Plate / Top Plate / Inner Hood 4.788 2.795 AWl 95645 Hood Support / Inner Hood 5.461 2.921 AWl 95646 Hood Support / Inner Hood 5.557 2.971 AWl 99115 Top Thick Plate / Top Plate / Inner Hood 5.318 2.934 AWl 99132 Top Thick Plate / Top Plate / Inner Hood 4.224 2.806 AWl 95657 Hood Support / Inner Hood 5.393 2.954 AWl 95643 Hood Support / Inner Hood 5.695 2.930 AWl 95644 Hood Support / Inner Hood 5.502 2.931 AWl 95428 Hood Support / Outer Base Plate / Middle Backing Bar 1.900 3.276 AWl 95642 Hood Support / Inner Hood 5.968 2.959 AWl 94626 Hood Support / Outer Cover Plate / Outer Hood 1.994 3.072 AWl 91091 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / End Plate 5.166 3.601 AWl 90170 Thick Vane Bank Plate / Thin Vane Bank Plate/ Side Plate / Side Plate Ext / End Plate 4.290 2.373 AWl 95658 Hood Support / Inner Hood 5.348 2.917 AWl 95246 Outer Cover Plate / Outer Hood 5.760 3.441 AWl 87478 Outer Cover Plate / Man Way Overlap 6.052 3.558 AWl 95641 Hood Support / Inner Hood 6.066 3.027 AWl 97693 Double Side Plate / Top Plate 3.906 2.972 AWl 95223 Outer Cover Plate / Outer Hood 5.999 3.469 AWl 91154 Entry Bottom Perf / Side Plate / End Plate 5.358 3.713 AWl 85516 Top Thick Plate / Inner Hood / Top Plate 6.141 3.129 AWl 99122 Top Thick Plate / Top Plate / Inner Hood 5.444 2.894 AWl 89317 Closure Plate / Middle Hood 2.272 2.686 AWl 91155 Entry Bottom Perf/Side Plate / End Plate 5.351 3.720 AWl 99123 Top Thick Plate / Top Plate / Inner Hood 5.662 2.923 AWl 99163 Top Thick Plate / Top Plate / Inner Hood 5.438 3.061 AWl 99131 Top Thick Plate / Top Plate / Inner Hood 4.986 2.943 AWl 93197 Double Side Plate / Top Plate 3.923 3.022 AWl 95617 Double Side Plate / Top Plate 4.475 3.140 AW2 91054 Side Plate / Top Plate 2.165 2.869 AW2 95638 Hood Support / Inner Hood 6.304 3.147 AW2 87633 Side Plate / Brace 3.874 3.148 AW2 90947 Top Thick Plate / Middle Hood / Top Plate 5.274 3.125 AW2 95251 Outer Cover Plate / Outer Hood 6.149 3.604 11 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 102083 Hood Support / Inner Hood 6.733 3.432 AW2 96036 Hood Support / Middle Hood 6.586 3.631 AW2 90460 Hood Support / Inner Hood 7.084 4.146 AW2 85723 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 1.858 2.774 AW2 95632 Hood Support / Inner Hood 6.665 3.463 AW2 99456 Side Plate / Top Plate 2.607 3.207 AW2 94509 Outer End Plate / Outer Hood 5.003 2.930 AW2 95975 Closure Plate / Inner Hood 2.416 4.697 AW2 102707 Top Thick Plate / Inner Hood / Top Plate 6.160 3.542 AW2 85774 Hood Support / Outer Hood 7.275 3.900 AW2 96096 Top Thick Plate / Side Plate / Closure Plate 4.578 4.674 AW2 138250 Tie Bar 3.434 3.532 AW2 91215 Side Plate / Top Plate 1.920 3.568 AW2 101820 Entry Bottom Perf/ Side Plate / Outer End Plate 6.413 3.674 AW2 93348 End Plate / Inner Hood 3.722 4.503 AW2 100314 Thin Vane Bank Plate / Hood Support / Outer Base Plate 3.923 4.026 AW2 89650 Side Plate / Brace 4.442 3.240 AW2 103080 Side Plate / Top Plate 3.583 3.369 AW2 91882 Hood Support / Middle Hood 7.944 4.292 AW2 96023 Hood Support / Middle Hood 6.989 3.711 AW2 90445 Hood Support / Inner Hood 7.236 3.881 AW2 85117 Double Side Plate / Top Plate 4.663 3.566 AW2 96132 End Plate / End Plate Ext 5.550 3.062 AW2 96111 End Plate / End Plate Ext 5.796 3.100 AW2 90812 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / Outer End Plate 4.541 3.554 AW2 94569 Outer End Plate / Outer Hood 7.320 3.767 AW2 84197 Middle Base Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 1.853 3.944 AW2 88718 Hood Support / Inner Hood 8.497 4.397 AW2 94523 Outer End Plate / Outer Hood 7.612 4.184 AW2 96017 Hood Support / Middle Hood 7.610 4.008 AW2 87492 Outer Cover Plate / Man Way Overlap 4.534 4.671 AW2 98968 Thin Vane Bank Plate / Hood Support / Middle Base Plate 2.265 4.204 AW2 99311 Hood Support / Outer Hood 7.903 4.233 AW2 87454 Outer Cover Plate / Man Way Overlap 6.039 4.586 AW2 95000 Hood Support / Outer Base Plate/Middle Backing Bar 2.936 4.752 AW2 99429 Hood Support / Middle Hood 8.336 4.317 AW2 88745 Side Plate/ Brace 8.246 4.282 AW2 91616 Hood Support / Outer Hood 8.594 4.312 AW2 95264 Outer End Plate / Outer End Plate Ext 6.926 3.780 AW2 90419 Thin Vane Bank Plate / Hood Support / Inner Base Plate 3.565 3.901 AW2 95139 Submerged Drain Channel / Submerged Skirt 2.920 4.612 12 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 92984 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 3.422 3.834 AW2 90508 Entry Bottom Perf/ Side Plate / End Plate 6.546 5.514 AW2 87784 Side Plate / Closure Plate / Exit Top Perf/ Exit Mid Top Perf 8.537 4.371 AW2 99207 Closure Plate / Middle Hood 9.889 5.000 AW2 92995 Thin Vane Bank Plate / Hood Support / Inner Base Plate 2.227 4.350 AN1 81316 Inner Hood 4.878 2.429 AN1 70703 Inner Hood 5.889 2.976 AN1 70645 Inner Hood 6.008 2.998 AN1 70588 Inner Hood 5.751 3.033 ANI 81346 Inner Hood 5.542 2.798 AN1 70672 Inner Hood 5.791 3.028 AN1 81341 Inner Hood 5.536 2.853 ANI 81332 Inner Hood 5.684 2.858 ANI 70653 Inner Hood 6.102 3.207 AN2 70582 Inner Hood 7.457 3.662 AN2 37724 Brace 5.031 3.717 AN2 30488 Middle Hood 6.617 3.299 AN2 34771 Middle Hood 8.480 4.262 AN2 70627 Inner Hood 8.495 4.170 AN2 72678 Inner Hood 8.839 4.354 AN2 34101 Middle Hood 10.454 5.319 AN2 70803 Inner Hood 8.896 4.473 AN2 70172 Inner Hood 7.986 4.205 PW 113554 Upper Support Ring / Support / Seismic Block 1.231 5.634 PW 94143 Side Plate Ext / Inner Base Plate 1.311 11.095 PW 143795 Tie Bar 1.527 6.177 PW 91558 Top Thick Plate / Side Plate / Closure Plate / Top Plate 2.190 5.934 PW 99200 Inner Side Plate / Inner Base Plate 1.686 8.383 PW 85191 Thin Vane Bank Plate / Hood Support / Inner Base Plate 1.826 4.620 PW 93062 Closure Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 2.613 8.910 PW 94498 Outer Cover Plate / Outer Hood 1.883 5.826 PW 90468 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 2.068 3.841 PW 113508 Upper Support Ring / Seismic Block / Support 2.403 10.978 PW 143757 Tie Bar 2.553 7.961 PW 95172 Closure Plate / Inner Hood 2.674 4.222 PW 100298 Thin Vane Bank Plate/Hood Support/Outer Base Plate 2.864 4.366 PW 99455 Side Plate / Top Plate 2.231 2.988 PN 37229 Inner Side Plate 2.210 18.081 XW 93709 Additional Points for Monitoring on Skirt Crack 5.241 8.696 XW 93046 Additional Points for Monitoring on Skirt Crack 5.709 9.003 13 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information XW 92992 Additional Points for Monitoring on Skirt Crack 4.816 7.079 XW 93710 Additional Points for Monitoring on Skirt Crack 5.937 8.584 Notes: a: The groups refer to the following categorizations based on the stress analysis at CLTP: AWl -set of all nodes on a weld with alternating stress ratios SR-a < 3.5 AW2 -reduced point set (RPS) of nodes on a weld with alternating stress ratios, 3.5 < SR-a < 5.0 ANI -set of all nodes on a non-weld with alternating stress ratios SR-a < 3.5 AN2 -RPS of nodes on a non-weld with alternating stress ratios, 3.5 < SR-a < 5.0 PW -RPS of nodes on a weld with peak stress ratio, SR-P < 3.0 PN -RPS of nodes on a non-weld with peak stress ratio, SR-P < 3.0 XW -extra nodes selected for monitoring stresses near repaired indications on the skirt b: Node numbers correspond to node indices in the finite element model, for future reference 14 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information C.D.I. Technical Note No. 12-16NP Limit Curves with ACM Rev. 4.1 for the 115% Power Level Basis at Nine Mile Point Unit 2 Revision 0 Prepared by Continuum Dynamics, Inc.34 Lexington Avenue Ewing, NJ 08618 Prepared under Purchase Order No. 4500428093 for Westinghouse Electric Company LLC Nuclear Services Business Unit 20 International Drive Windsor, CT 06095 Approved by W414-4~jaA4~Alan J. Bilanin Prepared by Milton E. Teske July 2012 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table of Contents Section Page T able of C ontents .....................................................................
ii 1. Introduction
............................................................................
1 2 .A pproach ...............................................................................
2 3. L im it C urves ..........................................................................
4 4. R eferences
.............................................................................
9 A ppendix ..............................................................................
10 ii This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 1. Introduction During power ascension of Nine Mile Point Unit 2 (NMP2), from Current Licensed Thermal Power (CLTP) to Extended Power Uprate (EPU), Nine Mile Point Nuclear Station, LLC (NMPNS) is required to monitor the dryer stresses at plant power levels that have not yet been achieved.
Limit curves provide an upper bound safeguard against the potential for dryer stresses becoming higher than allowable, by estimating the not-to-be-exceeded main steam line pressure levels. In the case of NMP2, in-plant main steam line data have been analyzed at 115%power conditions to provide steam dryer hydrodynamic loads. A real-time finite element model stress analysis has been undertaken on these loads at pre-selected dryer nodal locations.
These loads provide the basis for generation of the limit curves to be used during NMP2 power ascension.
Limit curves allow NMPNS to monitor dryer stress levels, by comparing the main steam line pressure readings -represented in Power Spectral Density (PSD) format -with the upper bound PSD derived from existing in-plant data.This technical note summarizes the limit curves generated from the 115% power data, utilizing Rev. 4.1 of the ACM [1].
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 2. Approach The limit curve analysis for NMP2, to be used during power ascension, is patterned after the approach followed by Entergy Vermont Yankee (VY) in its power uprate [2]. In the VY analysis, two levels of steam dryer performance criteria were described:
(1) a Level 1 pressure level based on maintaining the ASME allowable alternating stress value on the dryer, and (2) a Level 2 pressure level based on maintaining 80% of the allowable alternating stress value on the dryer. The VY approach is summarized in [3].To develop the limit curves for NMP2, the stress levels in the dryer were calculated for the current plant acoustic signature, and then used to determine how much the acoustic signature could be increased while maintaining stress levels below the stress fatigue limit. During power ascension, strain gage data will be converted to pressure in PSD format at each of the eight main steam line locations, for comparison with the limit curves. The strain gage data will be monitored throughout power ascension to observe the onset of discrete peaks, if they occur.The finite element analysis using the NMP2 110% power data found a lowest/minimum alternating stress ratio of 2.20, as summarized in Table 1. The minimum stress ratio includes the model bias and uncertainties for specific frequency ranges as summarized in [1]. The results of the ACM Rev. 4.1 analysis, based on Quad Cities Unit 2 in-plant data, are summarized in Table 2 (a negative bias is conservative).
The additional bias and uncertainties, as identified in [4], [5],[6], [7], [8], and [9], are shown in Table 3. SRSS of the uncertainties, added to the ACM bias, results in the total uncertainties shown in Table 4. These uncertainties were applied to the finite element analysis, resulting in the minimum stress ratio of 2.20 for ASME Level A load combinations (see the Appendix for stress ratios at selected dryer nodes).Table 1. Peak Stress Limit Summary for ACM Rev. 4.1 Peak Stress Limit 13,600 psi (Level 1) 10,880 psi (Level 2)Minimum Stress Ratio 2.20 1.76 2 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table 2. Bias and uncertainty for ACM Rev. 4.1 Er (3)]]Table 3. NMP2 additional uncertainties (with references cited)[[(3)]]Table 4. NMP2 total uncertainty Er (3)]]3 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 3. Limit Curves Limit curves were generated from the in-plant 115% power level strain gage data collected in July 2012. These data were filtered across the frequency ranges shown in Table 5 to remove noise and extraneous signal content. The resulting PSD curves for the eight strain gage locations were used to develop the limit curves, shown in Figures 1 to 4. Level 1 limit curves are found by multiplying the 115% power level main steam line pressure PSD traces by the square of the minimum alternating stress ratio, from Table 1, while the Level 2 limit curves are found by multiplying the 115% power level PSD traces by 0.64 of the square of the minimum alternating stress ratio, again from Table 1, as PSD is related to the square of the pressure.Table 5. Exclusion frequencies for NMP2 at 115% power Frequency Range (Hz) Exclusion Cause 0.0 -2.0 Mean 59.9 -60.1 EMF Frequency 119.6 -120.3 EMF Frequency 179.8 -180.2 EMF Frequency 148.9 -149.3 Recirculation Vane Passing Frequency 4 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information I[[(3)]]Figure 1. Level 1 (black) and Level 2 (red) limit curves for main steam line A, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).5 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]Figure 2. Level 1 (black) and Level 2 (red) limit curves for main steam line B, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).6 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]Figure 3. Level 1 (black) and Level 2 (red) limit curves for main steam line C, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).7 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[I Figure 4. Level 1 (black) and Level 2 (red) limit curves for main steam line D, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).8 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 4. References
: 1. Continuum Dynamics, Inc. 2011. ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements (Rev. 3). C.D.I. Report No. 10-09 (Proprietary).
: 2. Entergy Nuclear Northeast.
2006. Entergy Vermont Yankee Steam Dryer Monitoring Plan (Rev. 4). Docket 50-271. No. BVY 06-056. Dated 29 June 2006.3. State of Vermont Public Service Board. 2006. Petition of Vermont Department of Public Service for an Investigation into the Reliability of the Steam Dryer and Resulting Performance of the Vermont Yankee Nuclear Power Station under Uprate Conditions.
Docket No. 7195. Hearings held 17-18 August 2006.4. Structural Integrity Associates, Inc. 2008. Nine Mile Point Unit 2 Strain Gage Uncertainty Evaluation and Pressure Conversion Factors (Rev. 1). SIA Calculation Package No. NMP-26Q-301.5. Continuum Dynamics, Inc. 2005. Vermont Yankee Instrument Position Uncertainty.
Letter Report Dated 01 August 2005.6. Exelon Nuclear Generating LLC. 2005. An Assessment of the Effects of Uncertainty in the Application of Acoustic Circuit Model Predictions to the Calculation of Stresses in the Replacement Quad Cities Units 1 and 2 Steam Dryers (Rev. 0). Document No. AM-21005-008.7. Continuum Dynamics, Inc. 2007. Finite Element Modeling Bias and Uncertainty Estimates Derived from the Hope Creek Unit 2 Dryer Shaker Test (Rev. 0). C.D.I. Report No. 07-27 (Proprietary).
: 8. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.79.9. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.110.10. Continuum Dynamics, Inc. 2012. Real-Time Monitoring of the Nine Mile Point Steam During Power Ascension (Rev. 0). C.D.I. Technical Note No. 12-17 (Proprietary).
: 11. Continuum Dynamics, Inc. 2011. Stress Evaluation of Nine Mile Point Unit 2 Steam Dryer Using ACM Rev. 4.1 Acoustic Loads (Rev. 0). C.D.I. Report No. 11-04 (Proprietary).
9 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Appendix:
Real Time Nodal Analysis Results The minimum stress ratio at 115% is 2.196 as shown in Figure 5. Note that to recover a minimum stress ratio of 2.0 at EPU conditions, the minimum stress ratio at CLTP conditions must be 2.0x 1.17562 = 2.764. The red curve connects the CLTP and EPU points.Nine Mile Point Power Ascension 3 0 I-c/ri S S 2.8 2.6 2.4 2.2 2 1 100 105 110 115% CLTP Power 120 Figure 5: Minimum stress ratio track through power ascension:
predicted dryer stresses (black circles);
minimum trend to EPU conditions (red curve). EPU = 117.56% CLTP.The real-time stress analysis computes SR-P and SR-a summarized in Table 6, based on the analysis approach discussed in [10]. The minimum stress ratio location is shown in bold.Table 6: Real-time stress ratios at 115% Power Group(') Node(b) Location SR-P SR-a AWl 95267 Hood Support/Outer Cover Plate / Outer Hood 1.805 2.581 AWl 95237 Outer Cover Plate / Outer Hood 5.079 2.898 AWl 95236 Outer Cover Plate / Outer Hood 5.092 2.892 AWl 95238 Outer Cover Plate / Outer Hood 5.136 2.927 AWl 95241 Outer Cover Plate / Outer Hood 5.133 2.946 AWl 95234 Outer Cover Plate / Outer Hood 5.286 2.945 AWl 95242 Outer Cover Plate / Outer Hood 5.163 2.995 AWl 95235 Outer Cover Plate / Outer Hood 5.257 2.989 AWl 99540 Hood Support / Inner Hood 5.424 2.941 AWl 99337 Hood Support / Outer Cover Plate / Outer Hood 2.574 2.528 10 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AWl 99104 Top Thick Plate / Top Plate / Inner Hood 5.574 2.861 AWl 85512 Top Thick Plate / Inner Hood / Top Plate 4.702 2.581 AWl 95233 Outer Cover Plate / Outer Hood 5.328 3.045 AWl 95243 Outer Cover Plate / Outer Hood 5.125 3.052 AWl 99541 Hood Support / Inner Hood 5.412 2.967 AWl 95232 Outer Cover Plate / Outer Hood 5.269 3.086 AWl 99539 Hood Support / Inner Hood 5.808 3.136 AWl 98067 Hood Support / Outer Base Plate / Middle Backing Bar 2.044 2.686 AW1 99130 Top Thick Plate / Top Plate / Inner Hood 5.131 2.990 AW1 95645 Hood Support / Inner Hood 5.713 3.106 AWl 95646 Hood Support / Inner Hood 5.709 3.106 AWl 99115 Top Thick Plate / Top Plate / Inner Hood 5.376 2.971 AWl 99132 Top Thick Plate / Top Plate / Inner Hood 4.466 3.053 AWl 95657 Hood Support / Inner Hood 5.871 3.258 AWl 95643 Hood Support / Inner Hood 5.973 3.143 AWl 95644 Hood Support / Inner Hood 5.779 3.095 AWl 95428 Hood Support / Outer Base Plate / Middle Backing Bar 1.800 2.807 AWl 95642 Hood Support / Inner Hood 6.236 3.170 AWl 94626 Hood Support / Outer Cover Plate / Outer Hood 1.992 2.984 AWl 91091 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / End Plate 4.875 3.166 AWl 90170 Thick Vane Bank Plate / Thin Vane Bank Plate/ Side Plate / Side Plate Ext / End Plate 3.932 2.196 AWl 95658 Hood Support / Inner Hood 5.900 3.252 AWl 95246 Outer Cover Plate / Outer Hood 5.384 3.228 AWl 87478 Outer Cover Plate / Man Way Overlap 5.754 3.321 AWl 95641 Hood Support / Inner Hood 6.365 3.226 AWl 97693 Double Side Plate / Top Plate 3.705 2.634 AWl 95223 Outer Cover Plate / Outer Hood 5.512 3.241 AWl 91154 Entry Bottom Perf/ Side Plate / End Plate 4.962 3.243 AWl 85516 Top Thick Plate / Inner Hood / Top Plate 5.208 2.775 AWl 99122 Top Thick Plate / Top Plate / Inner Hood 5.922 3.067 AWl 89317 Closure Plate / Middle Hood 2.193 2.580 AWl 91155 Entry Bottom Perf/ Side Plate / End Plate 4.912 3.189 AWl 99123 Top Thick Plate / Top Plate / Inner Hood 6.153 3.089 AWl 99163 Top Thick Plate / Top Plate / Inner Hood 5.440 3.056 AWl 99131 Top Thick Plate / Top Plate / Inner Hood 5.376 3.140 AWl 93197 Double Side Plate / Top Plate 3.999 3.111 AWl 95617 Double Side Plate / Top Plate 3.814 2.629 AW2 91054 Side Plate / Top Plate 2.156 2.662 AW2 95638 Hood Support / Inner Hood 6.680 3.337 AW2 87633 Side Plate/ Brace 3.424 2.877 AW2 90947 Top Thick Plate / Middle Hood / Top Plate 5.756 3.327 AW2 95251 Outer Cover Plate / Outer Hood 5.728 3.393 11 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 102083 Hood Support / Inner Hood 6.166 3.297 AW2 96036 Hood Support / Middle Hood 5.857 3.326 AW2 90460 Hood Support / Inner Hood 7.137 3.832 AW2 85723 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 1.853 2.833 AW2 95632 Hood Support / Inner Hood 6.572 3.503 AW2 99456 Side Plate / Top Plate 2.525 3.068 AW2 94509 Outer End Plate / Outer Hood 5.142 2.765 AW2 95975 Closure Plate / Inner Hood 2.438 4.637 AW2 102707 Top Thick Plate / Inner Hood / Top Plate 5.617 3.272 AW2 85774 Hood Support / Outer Hood 6.071 3.218 AW2 96096 Top Thick Plate / Side Plate / Closure Plate 4.678 4.772 AW2 138250 Tie Bar 2.893 2.853 AW2 91215 Side Plate / Top Plate 1.850 3.212 AW2 101820 Entry Bottom Perf/ Side Plate / Outer End Plate 6.158 3.328 AW2 93348 End Plate / Inner Hood 3.731 3.762 AW2 100314 Thin Vane Bank Plate / Hood Support / Outer Base Plate 3.827 3.804 AW2 89650 Side Plate / Brace 4.198 3.061 AW2 103080 Side Plate / Top Plate 3.307 2.886 AW2 91882 Hood Support / Middle Hood 7.427 4.049 AW2 96023 Hood Support / Middle Hood 6.968 3.851 AW2 90445 Hood Support / Inner Hood 6.952 3.836 AW2 85117 Double Side Plate / Top Plate 3.938 2.851 AW2 96132 End Plate / End Plate Ext 5.533 3.026 AW2 96111 End Plate / End Plate Ext 5.773 3.064 AW2 90812 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / Outer End Plate 3.887 2.845 AW2 94569 Outer End Plate / Outer Hood 6.489 3.404 AW2 84197 Middle Base Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 1.811 3.613 AW2 88718 Hood Support / Inner Hood 8.400 4.289 AW2 94523 Outer End Plate / Outer Hood 7.887 4.282 AW2 96017 Hood Support / Middle Hood 7.932 4.156 AW2 87492 Outer Cover Plate / Man Way Overlap 4.235 4.058 AW2 98968 Thin Vane Bank Plate / Hood Support / Middle Base Plate 2.088 3.684 AW2 99311 Hood Support / Outer Hood 8.916 4.563 AW2 87454 Outer Cover Plate / Man Way Overlap 5.815 4.591 AW2 95000 Hood Support / Outer Base Plate/Middle Backing Bar 2.808 4.390 AW2 99429 Hood Support / Middle Hood 7.593 4.120 AW2 88745 Side Plate / Brace 7.192 3.747 AW2 91616 Hood Support / Outer Hood 6.537 3.390 AW2 95264 Outer End Plate / Outer End Plate Ext 6.609 3.372 AW2 90419 Thin Vane Bank Plate / Hood Support / Inner Base Plate 3.802 3.867 AW2 95139 Submerged Drain Channel / Submerged Skirt 2.940 4.435 12 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 92984 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 3.380 3.744 AW2 90508 Entry Bottom Perf / Side Plate / End Plate 6.187 4.856 AW2 87784 Side Plate / Closure Plate / Exit Top Perf/ Exit Mid Top Perf 8.012 4.251 AW2 99207 Closure Plate / Middle Hood 8.502 4.335 AW2 92995 Thin Vane Bank Plate / Hood Support / Inner Base Plate 2.226 4.170 ANI 81316 Inner Hood 5.080 2.663 AN1 70703 Inner Hood 4.846 2.560 AN1 70645 Inner Hood 5.255 2.657 ANI 70588 Inner Hood 5.259 2.680 AN1 81346 Inner Hood 5.747 3.038 AN1 70672 Inner Hood 5.255 2.659 ANI 81341 Inner Hood 6.327 3.127 ANI 81332 Inner Hood 5.904 3.153 ANI 70653 Inner Hood 5.554 2.780 AN2 70582 Inner Hood 6.404 3.288 AN2 37724 Brace 4.752 3.544 AN2 30488 Middle Hood 6.926 3.597 AN2 34771 Middle Hood 8.571 4.192 AN2 70627 Inner Hood 7.739 3.779 AN2 72678 Inner Hood 7.838 3.947 AN2 34101 Middle Hood 9.102 4.520 AN2 70803 Inner Hood 7.684 3.908 AN2 70172 Inner Hood 7.536 3.901 PW 113554 Upper Support Ring / Support / Seismic Block 1.240 6.012 PW 94143 Side Plate Ext / Inner Base Plate 1.295 9.287 PW 143795 Tie Bar 1.491 5.698 PW 91558 Top Thick Plate / Side Plate / Closure Plate / Top Plate 2.118 5.297 PW 99200 Inner Side Plate / Inner Base Plate 1.651 7.728 PW 85191 Thin Vane Bank Plate / Hood Support / Inner Base Plate 1.762 3.919 PW 93062 Closure Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 2.623 8.254 PW 94498 Outer Cover Plate / Outer Hood 1.960 6.200 PW 90468 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 2.041 3.762 PW 113508 Upper Support Ring / Seismic Block / Support 2.42 1 10.079 PW 143757 Tie Bar 2.440 7.167 PW 95172 Closure Plate / Inner Hood 2.582 3.940 PW 100298 Thin Vane Bank Plate/Hood Support/Outer Base Plate 2.779 4.307 PW 99455 Side Plate / Top Plate 2.161 2.751 PN 37229 Inner Side Plate 2.195 16.015 XW 93709 Additional Points for Monitoring on Skirt Crack 5.273 8.453 XW 93046 Additional Points for Monitoring on Skirt Crack 5.776 8.594 13 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information XW 92992 I Additional Points for Monitoring on Skirt Crack 4.789 7.264 XW 93710 Additional Points for Monitoring on Skirt Crack 5.865 8.555 Notes: a: The groups refer to the following categorizations based on the stress analysis at CLTP: AWl -set of all nodes on a weld with alternating stress ratios SR-a < 3.5 AW2 -reduced point set (RPS) of nodes on a weld with alternating stress ratios, 3.5 < SR-a < 5.0 ANI -set of all nodes on a non-weld with alternating stress ratios SR-a < 3.5 AN2 -RPS of nodes on a non-weld with alternating stress ratios, 3.5 < SR-a < 5.0 PW -RPS of nodes on a weld with peak stress ratio, SR-P < 3.0 PN -RPS of nodes on a non-weld with peak stress ratio, SR-P < 3.0 XW -extra nodes selected for monitoring stresses near repaired indications on the skirt b: Node numbers correspond to node indices in the finite element model, for future reference 14 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information C.D.I. Technical Note No. 12-28NP Limit Curves with ACM Rev. 4.1 for the 115% Power Level Basis with 92.5 Hz Peak at Nine Mile Point Unit 2 Revision 0 Prepared by Continuum Dynamics, Inc.34 Lexington Avenue Ewing, NJ 08618 Prepared under Purchase Order No. 4500428093 for Westinghouse Electric Company LLC Nuclear Services Business Unit 20 International Drive Windsor, CT 06095 Approved by Alan J. Bilanin Prepared by Milton E. Teske August 2012 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table of Contents Section Page T able of C ontents .....................................................................
ii 1. Introduction
............................................................................
1 2. A pproach ...............................................................................
2 3. L im it C urves ..........................................................................
4 4 .R eferences
.............................................................................
9 A ppendix ..............................................................................
10 ii This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 1. Introduction During power ascension of Nine Mile Point Unit 2 (NMP2), from Current Licensed Thermal Power (CLTP) to Extended Power Uprate (EPU), Nine Mile Point Nuclear Station, LLC (NMPNS) is required to monitor the dryer stresses at plant power levels that have not yet been achieved.
Limit curves provide an upper bound safeguard against the potential for dryer stresses becoming higher than allowable, by estimating the not-to-be-exceeded main steam line pressure levels. In the case of NMP2, in-plant main steam line data have been analyzed at 115%power conditions
-with a 92.5 Hz frequency peak added on main steam line B from data collected at 110% power conditions
-to provide steam dryer hydrodynamic loads. A real-time finite element model stress analysis has been undertaken on these loads at pre-selected dryer nodal locations.
These loads provide the basis for generation of the limit curves to be used during NMP2 power ascension.
Limit curves allow NMPNS to monitor dryer stress levels, by comparing the main steam line pressure readings -represented in Power Spectral Density (PSD) format -with the upper bound PSD derived from existing in-plant data.This technical note summarizes the limit curves generated from the 115% power data, utilizing Rev. 4.1 of the ACM [1].
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 2. Approach The limit curve analysis for NMP2, to be used during power ascension, is patterned after the approach followed by Entergy Vermont Yankee (VY) in its power uprate [2]. In the VY analysis, two levels of steam dryer performance criteria were described:
(1) a Level 1 pressure level based on maintaining the ASME allowable alternating stress value on the dryer, and (2) a Level 2 pressure level based on maintaining 80% of the allowable alternating stress value on the dryer. The VY approach is summarized in [3].To develop the limit curves for NMP2, the stress levels in the dryer were calculated for the current plant acoustic signature, and then used to determine how much the acoustic signature could be increased while maintaining stress levels below the stress fatigue limit. During power ascension, strain gage data will be converted to pressure in PSD format at each of the eight main steam line locations, for comparison with the limit curves. The strain gage data will be monitored throughout power ascension to observe the onset of discrete peaks, if they occur.A previous limit curve analysis was undertaken for the 115% power level data used here with the assumption that half of the strain gage pairs at the upper location on main steam line A were no longer operational
[4], when in fact they were. In addition, this power level did not exhibit the frequency peak at 92.5 Hz seen in previous 110% power level data [5]. Therefore, in the current analysis, all four strain gage pairs participated in generating the pressure at the upper location on MSL A, and a composite frequency peak at 92.5 Hz was constructed from the 110%power level data, corrected by velocity squared to 115% power, then substituted for the data on MSL B between 92 and 93 Hz, preserving the phase angles of the 115% power level.The finite element analysis using the composite NMP2 115% power data found a lowest/minimum alternating stress ratio of 2.39, as summarized in Table 1. The minimum stress ratio includes the model bias and uncertainties for specific frequency ranges as summarized in[1]. The results of the ACM Rev. 4.1 analysis, based on Quad Cities Unit 2 in-plant data, are summarized in Table 2 (a negative bias is conservative).
The additional bias and uncertainties, as identified in [6], [7], [8], [9], [10], and [11], are shown in Table 3. SRSS of the uncertainties, added to the ACM bias, results in the total uncertainties shown in Table 4. These uncertainties were applied to the finite element analysis, resulting in the minimum stress ratio of 2.39 for ASME Level A load combinations (see the Appendix for stress ratios at selected dryer nodes).Table 1. Peak Stress Limit Summary for ACM Rev. 4.1 Peak Stress Limit 13,600 psi (Level 1) 10,880 psi (Level 2)Minimum Stress Ratio 2.39 1.91 2 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table 2. Bias and uncertainty for ACM Rev. 4.1 (3)]]Table 3. NMP2 additional uncertainties (with references cited)I[(3)]]Table 4. NMP2 total uncertainty
[[(3)]]1 3 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 3. Limit Curves Limit curves were generated from the in-plant 115% power level strain gage data collected in July 2012, with a 92.5 Hz frequency peak added from the in-plant 110% power level data collected in July as well. These data were filtered across the frequency ranges shown in Table 5 to remove noise and extraneous signal content. The resulting PSD curves for the eight strain gage locations were used to develop the limit curves, shown in Figures 1 to 4. Level 1 limit curves are found by multiplying the 115% power level main steam line pressure PSD traces by the square of the minimum alternating stress ratio, from Table 1, while the Level 2 limit curves are found by multiplying the 115% power level PSD traces by 0.64 of the square of the minimum alternating stress ratio, again from Table 1, as PSD is related to the square of the pressure.Table 5. Exclusion frequencies for NMP2 at 115% power Frequency Range (H4z) Exclusion Cause 0.0 -2.0 Mean 59.9 -60.1 EMF Frequency 119.6 -120.3 EMF Frequency 179.8 -180.2 EMF Frequency 148.9 -149.3 Recirculation Vane Passing Frequency 4 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]1 Figure 1. Level 1 (black) and Level 2 (red) limit curves for main steam line A, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).5 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[I (3)]Figure 2. Level 1 (black) and Level 2 (red) limit curves for main steam line B, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).6 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[I (3)]Figure 3. Level 1 (black) and Level 2 (red) limit curves for main steam line C, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).7 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information I[[(3)]]Figure 4. Level 1 (black) and Level 2 (red) limit curves for main steam line D, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).8 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 4. References
: 1. Continuum Dynamics, Inc. 2011. ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements (Rev. 3). C.D.I. Report No. 10-09 (Proprietary).
: 2. Entergy Nuclear Northeast.
2006. Entergy Vermont Yankee Steam Dryer Monitoring Plan (Rev. 4). Docket 50-271. No. BVY 06-056. Dated 29 June 2006.3. State of Vermont Public Service Board. 2006. Petition of Vermont Department of Public Service for an Investigation into the Reliability of the Steam Dryer and Resulting Performance of the Vermont Yankee Nuclear Power Station under Uprate Conditions.
Docket No. 7195. Hearings held 17-18 August 2006.4. Continuum Dynamics, Inc. 2012. Limit Curves with ACM Rev. 4.1 for the 115% Power Level Basis at Nine Mile Point Unit 2 (Rev. 0). C.D.I. Technical Note No. 12-16 (Proprietary).
: 5. Continuum Dynamics, Inc. 2012. Limit Curves with ACM Rev. 4.1 for the 110% Power Level Basis at Nine Mile Point Unit 2 (Rev. 0). C.D.I. Technical Note No. 12-15 (Proprietary).
: 6. Structural Integrity Associates, Inc. 2008. Nine Mile Point Unit 2 Strain Gage Uncertainty Evaluation and Pressure Conversion Factors (Rev. 1). SIA Calculation Package No. NMP-26Q-301.7. Continuum Dynamics, Inc. 2005. Vermont Yankee Instrument Position Uncertainty.
Letter Report Dated 01 August 2005.8. Exelon Nuclear Generating LLC. 2005. An Assessment of the Effects of Uncertainty in the Application of Acoustic Circuit Model Predictions to the Calculation of Stresses in the Replacement Quad Cities Units 1 and 2 Steam Dryers (Rev. 0). Document No. AM-21005-008.9. Continuum Dynamics, Inc. 2007. Finite Element Modeling Bias and Uncertainty Estimates Derived from the Hope Creek Unit 2 Dryer Shaker Test (Rev. 0). C.D.I. Report No. 07-27 (Proprietary).
: 10. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.79.11. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.110.12. Continuum Dynamics, Inc. 2012. Real-Time Monitoring of the Nine Mile Point Steam During Power Ascension (Rev. 0). C.D.I. Technical Note No. 12-17 (Proprietary).
9 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Appendix:
Real Time Nodal Analysis Results The minimum stress ratio at 115% is 2.388 as shown in Figure 5. Note that to recover a minimum stress ratio of 2.0 at EPU conditions, the minimum stress ratio at CLTP conditions must be 2.Ox 1.17562 = 2.764. The red curve connects the CLTP and EPU points.Nine Mile Point Power Ascension 3 0 ci,, C,, S S 2.8 2.6 2.4 2.2 21 100 105 110 115% CLTP Power 120 Figure 5: Minimum stress ratio track through power ascension:
predicted dryer stresses (solid black circles);
previous 115% power level result (open black circle); minimum trend to EPU conditions (red curve). EPU = 117.56% CLTP.The real-time stress analysis computes SR-P and SR-a summarized in Table 6, based on the analysis approach discussed in [ 12]. The minimum stress ratio location is shown in bold.Table 6: Real-time stress ratios at 115% Power Group(a) Node(b) Location SR-P SR-a AWl 95267 Hood Support/Outer Cover Plate / Outer Hood 2.253 3.222 AWl 95237 Outer Cover Plate / Outer Hood 5.131 2.926 AWl 95236 Outer Cover Plate / Outer Hood 5.144 2.919 AWl 95238 Outer Cover Plate / Outer Hood 5.191 2.954 AWl 95241 Outer Cover Plate / Outer Hood 5.189 2.973 AWl 95234 Outer Cover Plate / Outer Hood 5.271 2.973 AWl 95242 Outer Cover Plate / Outer Hood 5.220 3.024 AWl 95235 Outer Cover Plate / Outer Hood 5.301 3.017 AWl 99540 Hood Support / Inner Hood 6.992 3.766 10 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW1 99337 Hood Support / Outer Cover Plate / Outer Hood 3.215 3.161 AWl 99104 Top Thick Plate / Top Plate / Inner Hood 5.520 2.817 AWl 85512 Top Thick Plate / Inner Hood / Top Plate 4.900 2.667 AWl 95233 Outer Cover Plate / Outer Hood 5.318 3.074 AWl 95243 Outer Cover Plate / Outer Hood 5.182 3.083 AWl 99541 Hood Support / Inner Hood 6.937 3.775 AWl 95232 Outer Cover Plate / Outer Hood 5.264 3.104 AWl 99539 Hood Support / Inner Hood 7.420 4.034 AWl 98067 Hood Support / Outer Base Plate / Middle Backing Bar 2.034 3.010 AW1 99130 Top Thick Plate / Top Plate / Inner Hood 6.096 3.511 AWl 95645 Hood Support / Inner Hood 7.232 3.909 AWl 95646 Hood Support / Inner Hood 7.192 3.915 AWl 99115 Top Thick Plate / Top Plate / Inner Hood 5.364 2.933 AWl 99132 Top Thick Plate / Top Plate / Inner Hood 5.330 3.547 AWl 95657 Hood Support / Inner Hood 7.401 4.115 AWl 95643 Hood Support / Inner Hood 7.806 4.065 AWl 95644 Hood Support / Inner Hood 7.450 4.013 AWl 95428 Hood Support / Outer Base Plate / Middle Backing Bar 1.765 2.797 AWl 95642 Hood Support / Inner Hood 8.197 4.145 AWl 94626 Hood Support / Outer Cover Plate / Outer Hood 2.566 4.066 AWl 91091 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / End Plate 5.315 3.567 AWl 90170 Thick Vane Bank Plate / Thin Vane Bank Plate/ Side Plate / Side Plate Ext / End Plate 4.398 2.493 AWl 95658 Hood Support / Inner Hood 7.438 4.106 AWl 95246 Outer Cover Plate / Outer Hood 5.443 3.261 AWl 87478 Outer Cover Plate / Man Way Overlap 5.761 3.329 AWl 95641 Hood Support / Inner Hood 8.381 4.228 AWl 97693 Double Side Plate / Top Plate 3.619 2.561 AWl 95223 Outer Cover Plate / Outer Hood 5.512 3.252 AWl 91154 Entry Bottom Perf/ Side Plate / End Plate 5.197 3.572 AWl 85516 Top Thick Plate / Inner Hood / Top Plate 5.424 2.866 AWl 99122 Top Thick Plate / Top Plate / Inner Hood 6.995 3.631 AWl 89317 Closure Plate / Middle Hood 2.202 2.388 AWl 91155 Entry Bottom Perf/Side Plate / End Plate 5.157 3.542 AWl 99123 Top Thick Plate / Top Plate / Inner Hood 7.282 3.657 AWl 99163 Top Thick Plate / Top Plate / Inner Hood 5.428 3.015 AWl 99131 Top Thick Plate / Top Plate / Inner Hood 6.405 3.686 AWl 93197 Double Side Plate / Top Plate 4.089 3.207 AWl 95617 Double Side Plate / Top Plate 3.780 2.579 AW2 91054 Side Plate / Top Plate 2.109 2.576 AW2 95638 Hood Support / Inner Hood 8.571 4.330 AW2 87633 Side Plate/ Brace 5.439 4.427 AW2 90947 Top Thick Plate / Middle Hood / Top Plate 5.699 3.261 11 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 95251 Outer Cover Plate / Outer Hood 5.790 3.427 AW2 102083 Hood Support / Inner Hood 7.700 4.208 AW2 96036 Hood Support / Middle Hood 8.178 4.590 AW2 90460 Hood Support / Inner Hood 8.724 4.749 AW2 85723 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 2.407 3.518 AW2 95632 Hood Support / Inner Hood 8.861 4.733 AW2 99456 Side Plate / Top Plate 3.166 3.744 AW2 94509 Outer End Plate / Outer Hood 5.515 3.204 AW2 95975 Closure Plate / Inner Hood 2.444 4.591 AW2 102707 Top Thick Plate / Inner Hood / Top Plate 5.854 3.387 AW2 85774 Hood Support / Outer Hood 7.718 4.097 AW2 96096 Top Thick Plate / Side Plate / Closure Plate 4.700 4.853 AW2 138250 Tie Bar 3.030 2.950 AW2 91215 Side Plate / Top Plate 1.868 3.305 AW2 101820 Entry Bottom Perf/ Side Plate / Outer End Plate 5.585 3.163 AW2 93348 End Plate / Inner Hood 3.725 4.135 AW2 100314 Thin Vane Bank Plate / Hood Support / Outer Base Plate 6.950 6.887 AW2 89650 Side Plate / Brace 4.634 3.317 AW2 103080 Side Plate / Top Plate 3.487 3.066 AW2 91882 Hood Support / Middle Hood 10.259 5.699 AW2 96023 Hood Support / Middle Hood 8.742 4.857 AW2 90445 Hood Support / Inner Hood 9.378 5.176 AW2 85117 Double Side Plate / Top Plate 4.069 2.969 AW2 96132 End Plate / End Plate Ext 6.206 3.444 AW2 96111 End Plate / End Plate Ext 8.660 4.644 AW2 90812 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / Outer End Plate 4.109 3.221 AW2 94569 Outer End Plate / Outer Hood 6.954 3.464 AW2 84197 Middle Base Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 1.806 3.623 AW2 88718 Hood Support / Inner Hood 11.021 5.711 AW2 94523 Outer End Plate / Outer Hood 7.952 4.371 AW2 96017 Hood Support / Middle Hood 9.956 5.359 AW2 87492 Outer Cover Plate / Man Way Overlap 4.286 4.112 AW2 98968 Thin Vane Bank Plate / Hood Support / Middle Base Plate 2.133 3.847 AW2 99311 Hood Support / Outer Hood 11.287 5.694 AW2 87454 Outer Cover Plate / Man Way Overlap 5.863 4.605 AW2 95000 Hood Support / Outer Base Plate/Middle Backing Bar 3.585 5.787 AW2 99429 Hood Support / Middle Hood 9.775 5.569 AW2 88745 Side Plate/ Brace 7.212 3.588 AW2 91616 Hood Support / Outer Hood 8.392 4.365 AW2 95264 Outer End Plate / Outer End Plate Ext 6.593 3.367 AW2 90419 Thin Vane Bank Plate / Hood Support / Inner Base Plate 3.770 4.064 12 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 95139 Submerged Drain Channel / Submerged Skirt 2.959 4.736 AW2 92984 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 4.375 4.723 AW2 90508 Entry Bottom Perf/ Side Plate / End Plate 6.555 5.442 AW2 87784 Side Plate / Closure Plate / Exit Top Perf/ Exit Mid Top Perf 8.422 4.275 AW2 99207 Closure Plate / Middle Hood 7.992 4.066 AW2 92995 Thin Vane Bank Plate / Hood Support / Inner Base Plate 2.199 3.964 ANI 81316 Inner Hood 4.901 2.583 AN1 70703 Inner Hood 5.093 2.663 ANI 70645 Inner Hood 5.467 2.728 ANI 70588 Inner Hood 5.386 2.754 ANI 81346 Inner Hood 5.663 3.015 AN1 70672 Inner Hood 5.300 2.727 ANI 81341 Inner Hood 6.260 3.090 ANI 81332 Inner Hood 5.799 3.108 ANI 70653 Inner Hood 5.605 2.850 AN2 70582 Inner Hood 6.667 3.378 AN2 37724 Brace 5.056 3.590 AN2 30488 Middle Hood 7.050 3.680 AN2 34771 Middle Hood 8.401 4.147 AN2 70627 Inner Hood 7.896 3.910 AN2 72678 Inner Hood 8.235 4.093 AN2 34101 Middle Hood 9.596 4.787 AN2 70803 Inner Hood 8.004 4.030 AN2 70172 Inner Hood 7.870 4.002 PW 113554 Upper Support Ring / Support / Seismic Block 1.243 6.117 PW 94143 Side Plate Ext / Inner Base Plate 1.305 9.949 PW 143795 Tie Bar 1.499 5.688 PW 91558 Top Thick Plate / Side Plate / Closure Plate / Top Plate 2.137 5.329 PW 99200 Inner Side Plate / Inner Base Plate 1.633 7.330 PW 85191 Thin Vane Bank Plate / Hood Support / Inner Base Plate 1.751 4.029 PW 93062 Closure Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 2.641 8.187 PW 94498 Outer Cover Plate / Outer Hood 1.958 6.434 PW 90468 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 2.627 4.827 PW 113508 Upper Support Ring / Seismic Block / Support 2.416 10.364 PW 143757 Tie Bar 2.477 7.339 PW 95172 Closure Plate / Inner Hood 2.574 3.994 PW 100298 Thin Vane Bank Plate/Hood Support/Outer Base Plate 4.833 7.581 PW 99455 Side Plate / Top Plate 2.097 2.582 PN 37229 Inner Side Plate 2.197 16.159 XW 93709 Additional Points for Monitoring on Skirt Crack 5.272 8.809 13 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information XW XW XW 93046 Additional Points for Monitoring on Skirt Crack 92992 Additional Points for Monitoring on Skirt Crack 93710 Additional Points for Monitoring on Skirt Crack 5.542 4.739 5.915 7.866 7.346 8.490 Notes: a: The groups refer to the following categorizations based on the stress analysis at CLTP: AWl -set of all nodes on a weld with alternating stress ratios SR-a < 3.5 AW2 -reduced point set (RPS) of nodes on a weld with alternating stress ratios, 3.5 < SR-a < 5.0 ANI -set of all nodes on a non-weld with alternating stress ratios SR-a < 3.5 AN2 -RPS of nodes on a non-weld with alternating stress ratios, 3.5 < SR-a < 5.0 PW -RPS of nodes on a weld with peak stress ratio, SR-P < 3.0 PN -RPS of nodes on a non-weld with peak stress ratio, SR-P < 3.0 XW -extra nodes selected for monitoring stresses near repaired indications on the skirt b: Node numbers correspond to node indices in the finite element model, for future reference 14 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information C.D.I. Technical Note No. 12-26NP Limit Curves with ACM Rev. 4.1 for the 110% Power Level Basis at Nine Mile Point Unit 2 with the Inboard RCIC Valve Closed Revision 0 Prepared by Continuum Dynamics, Inc.34 Lexington Avenue Ewing, NJ 08618 Prepared under Purchase Order No. 4500428093 for Westinghouse Electric Company LLC Nuclear Services Business Unit 20 International Drive Windsor, CT 06095 Approved by Alan J. Bilanin Prepared by Milton E. Teske August 2012 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table of Contents Section Page T able of C ontents .....................................................................
ii 1. Introduction
............................................................................
1 2 .A pproach ...............................................................................
2 3. L im it C urves ..........................................................................
4 4 .R eferences
.............................................................................
13 A ppendix .............................................................................
14 ii This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 1. Introduction During power ascension of Nine Mile Point Unit 2 (NMP2), from Current Licensed Thermal Power (CLTP) to Extended Power Uprate (EPU), Nine Mile Point Nuclear Station, LLC (NMPNS) is required to monitor the dryer stresses at plant power levels that have not yet been achieved.
Limit curves provide an upper bound safeguard against the potential for dryer stresses becoming higher than allowable, by estimating the not-to-be-exceeded main steam line pressure levels. In the case of NMP2, in-plant main steam line data have been analyzed at 110%power conditions to provide steam dryer hydrodynamic loads with the inboard RCIC valve closed. A real-time finite element model stress analysis has been undertaken on these loads at pre-selected dryer nodal locations.
These loads provide the basis for generation of the limit curves to be used during NMP2 power ascension.
Limit curves allow NMPNS to monitor dryer stress levels, by comparing the main steam line pressure readings -represented in Power Spectral Density (PSD) format -with the upper bound PSD derived from existing in-plant data.This technical note summarizes the limit curves generated from the 110% power data, utilizing Rev. 4.1 of the ACM [1].
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 2. Approach The limit curve analysis for NMP2, to be used during power ascension, is patterned after the approach followed by Entergy Vermont Yankee (VY) in its power uprate [2]. In the VY analysis, two levels of steam dryer performance criteria were described:
(1) a Level I pressure level based on maintaining the ASME allowable alternating stress value on the dryer, and (2) a Level 2 pressure level based on maintaining 80% of the allowable alternating stress value on the dryer. The VY approach is summarized in [3].To develop the limit curves for NMP2, the stress levels in the dryer were calculated for the current plant acoustic signature, and then used to determine how much the acoustic signature could be increased while maintaining stress levels below the stress fatigue limit. During power ascension, strain gage data will be converted to pressure in PSD format at each of the eight main steam line locations, for comparison with the limit curves. The strain gage data will be monitored throughout power ascension to observe the onset of discrete peaks, if they occur.The finite element analysis using the NMP2 110% power data with the inboard RCIC valve closed found a lowest/minimum alternating stress ratio of 2.22, as summarized in Table 1 (this stress ratio can be compared to the ratio of 2.40 developed from the 110% power data without closing the inboard RCIC valve [4]). The minimum stress ratio includes the model bias and uncertainties for specific frequency ranges as summarized in [1]. The results of the ACM Rev. 4.1 analysis, based on Quad Cities Unit 2 in-plant data, are summarized in Table 2 (a negative bias is conservative).
The additional bias and uncertainties, as identified in [5], [6], [7],[8], [9], and [10], are shown in Table 3. SRSS of the uncertainties, added to the ACM bias, results in the total uncertainties shown in Table 4. These uncertainties were applied to the finite element analysis, resulting in the minimum stress ratio of 2.22 for ASME Level A load combinations (see the Appendix for stress ratios at selected dryer nodes).Table 1. Peak Stress Limit Summary for ACM Rev. 4.1 Peak Stress Limit 13,600 psi (Level 1) 10,880 psi (Level 2)Minimum Stress Ratio 2.22 1.78 2 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table 2. Bias and uncertainty for ACM Rev. 4.1 (3)]]Table 3. NMP2 additional uncertainties (with references cited)(3)]]1 Table 4. NMP2 total uncertainty (3)]]3 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 3. Limit Curves Limit curves were generated from the in-plant 110% power level strain gage data collected in July 2012 with the inboard RCIC valve closed. These data were filtered across the frequency ranges shown in Table 5 to remove noise and extraneous signal content. The resulting PSD curves for the eight strain gage locations were used to develop the limit curves, shown in Figures 1 to 4. Level 1 limit curves are found by multiplying the 110% power level main steam line pressure PSD traces by the square of the minimum alternating stress ratio, from Table 1, while the Level 2 limit curves are found by multiplying the 110% power level PSD traces by 0.64 of the square of the minimum alternating stress ratio, again from Table 1, as PSD is related to the square of the pressure.Figures 5 to 8 contain comparisons with the eight main steam line strain gage signals at 110% power without closing the inboard RCIC valve [4].Table 5. Exclusion frequencies for NMP2 at 110% power Frequency Range (Hz) Exclusion Cause 0.0 -2.0 Mean 59.9 -60.1 EMF Frequency 119.6 -120.3 EMF Frequency 179.8 -180.2 EMF Frequency 148.9 -149.3 Recirculation Vane Passing Frequency 4 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[(3)]]Figure 1. Level I (black) and Level 2 (red) limit curves for main steam line A, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).5 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[I (3)]Figure 2. Level 1 (black) and Level 2 (red) limit curves for main steam line B, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).6 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[II (3)]]Figure 3. Level 1 (black) and Level 2 (red) limit curves for main steam line C, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).7 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[(3 Figure 4. Level 1 (black) and Level 2 (red) limit curves for main steam line D, compared against the base curves (blue) over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).8 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]Figure 5. Comparison between main steam line A pressure signals at 110% power, for closure of the inboard RCIC valve (black curves) and the open valve (red curves), over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).9 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]1 Figure 6. Comparison between main steam line B pressure signals at 110% power, for closure of the inboard RCIC valve (black curves) and the open valve (red curves), over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).10 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Figure 7. Comparison between main steam line C pressure signals at 110% power, for closure of the inboard RCIC valve (black curves) and the open valve (red curves), over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).11 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]1 Figure 8. Comparison between main steam line D pressure signals at 110% power, for closure of the inboard RCIC valve (black curves) and the open valve (red curves), over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).12 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 4. References
: 1. Continuum Dynamics, Inc. 2011. ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements (Rev. 3). C.D.I. Report No. 10-09 (Proprietary).
: 2. Entergy Nuclear Northeast.
2006. Entergy Vermont Yankee Steam Dryer Monitoring Plan (Rev. 4). Docket 50-271. No. BVY 06-056. Dated 29 June 2006.3. State of Vermont Public Service Board. 2006. Petition of Vermont Department of Public Service for an Investigation into the Reliability of the Steam Dryer and Resulting Performance of the Vermont Yankee Nuclear Power Station under Uprate Conditions.
Docket No. 7195. Hearings held 17-18 August 2006.4. Continuum Dynamics, Inc. 2012. Limit Curves with ACM Rev. 4.1 for the 110% Power Level Basis at Nine Mile Point Unit 2 (Rev. 0). C.D.I. Technical Note No. 12-15 (Proprietary).
: 5. Structural Integrity Associates, Inc. 2008. Nine Mile Point Unit 2 Strain Gage Uncertainty Evaluation and Pressure Conversion Factors (Rev. 1). SIA Calculation Package No. NMP-26Q-301.6. Continuum Dynamics, Inc. 2005. Vermont Yankee Instrument Position Uncertainty.
Letter Report Dated 01 August 2005.7. Exelon Nuclear Generating LLC. 2005. An Assessment of the Effects of Uncertainty in the Application of Acoustic Circuit Model Predictions to the Calculation of Stresses in the Replacement Quad Cities Units 1 and 2 Steam Dryers (Rev. 0). Document No. AM-21005-008.8. Continuum Dynamics, Inc. 2007. Finite Element Modeling Bias and Uncertainty Estimates Derived from the Hope Creek Unit 2 Dryer Shaker Test (Rev. 0). C.D.I. Report No. 07-27 (Proprietary).
: 9. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.79.10. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.110.11. Continuum Dynamics, Inc. 2012. Real-Time Monitoring of the Nine Mile Point Steam During Power Ascension (Rev. 0). C.D.I. Technical Note No. 12-17 (Proprietary).
13 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Appendix:
Real Time Nodal Analysis Results The minimum stress ratio at 110% is 2.222 as shown in Figure 9. Note that to recover a minimum stress ratio of 2.0 at EPU conditions, the minimum stress ratio at CLTP conditions must be 2.0x 1.17562 = 2.764. The red curve connects the CLTP and EPU points.Nine Mile Point Power Ascension 3 0&#xfd;2.8 2.6 2.4 2.2 21 100 105 110 115% CLTP Power 120 Figure 9: Minimum stress ratio track through power ascension:
predicted dryer stresses (black circles);
minimum trend to EPU conditions (red curve); predicted dryer stress for closure of the inboard RCIC valve (open black circles).
EPU = 117.56% CLTP.The real-time stress analysis computes SR-P and SR-a summarized in Table analysis discussed in [ 11]. The minimum stress ratio location is shown in bold.6, based on the Table 6: Real-time stress ratios at 110% Power.Group(') Node(b) Location SR-P SR-a AWl 95267 Hood Support/Outer Cover Plate / Outer Hood 1.903 2.835 AWl 95237 Outer Cover Plate / Outer Hood 5.316 3.132 AWl 95236 Outer Cover Plate / Outer Hood 5.274 3.122 AWl 95238 Outer Cover Plate / Outer Hood 5.435 3.196 AWl 95241 Outer Cover Plate / Outer Hood 5.493 3.234 AWl 95234 Outer Cover Plate / Outer Hood 5.405 3.186 AWl 95242 Outer Cover Plate / Outer Hood 5.579 3.302 AWl 95235 Outer Cover Plate / Outer Hood 5.390 3.228 AWl 99540 Hood Support / Inner Hood 5.277 2.921 14 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AWl 99337 Hood Support / Outer Cover Plate / Outer Hood 2.922 3.063 AWl 99104 Top Thick Plate / Top Plate / Inner Hood 6.451 3.296 AWl 85512 Top Thick Plate / Inner Hood / Top Plate 4.741 2.507 AWl 95233 Outer Cover Plate / Outer Hood 5.461 3.272 AWl 95243 Outer Cover Plate / Outer Hood 5.597 3.379 AWl 99541 Hood Support / Inner Hood 5.266 2.970 AWl 95232 Outer Cover Plate / Outer Hood 5.385 3.302 AWl 99539 Hood Support / Inner Hood 5.589 3.024 AWl 98067 Hood Support / Outer Base Plate / Middle Backing Bar 2.008 3.123 AWl 99130 Top Thick Plate / Top Plate / Inner Hood 4.973 3.426 AWl 95645 Hood Support / Inner Hood 4.502 2.393 AWl 95646 Hood Support / Inner Hood 4.623 2.465 AWl 99115 Top Thick Plate / Top Plate / Inner Hood 6.033 3.453 AWl 99132 Top Thick Plate / Top Plate / Inner Hood 4.325 3.461 AWl 95657 Hood Support / Inner Hood 5.886 3.099 AWl 95643 Hood Support / Inner Hood 4.523 2.316 AWl 95644 Hood Support / Inner Hood 4.468 2.339 AWl 95428 Hood Support / Outer Base Plate / Middle Backing Bar 1.886 2.912 AWl 95642 Hood Support / Inner Hood 4.585 2.309 AWl 94626 Hood Support / Outer Cover Plate / Outer Hood 2.007 2.926 AWl 91091 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / End Plate 5.444 3.845 AWl 90170 Thick Vane Bank Plate / Thin Vane Bank Plate/ Side Plate / Side Plate Ext / End Plate 5.226 3.157 AWl 95658 Hood Support / Inner Hood 5.897 3.157 AWl 95246 Outer Cover Plate / Outer Hood 5.897 3.586 AWl 87478 Outer Cover Plate / Man Way Overlap 5.843 3.465 AWl 95641 Hood Support / Inner Hood 4.616 2.330 AWl 97693 Double Side Plate / Top Plate 3.634 2.377 AWl 95223 Outer Cover Plate / Outer Hood 5.620 3.453 AWl 91154 Entry Bottom Perf/ Side Plate / End Plate 5.380 4.017 AWl 85516 Top Thick Plate / Inner Hood / Top Plate 5.325 2.706 AWl 99122 Top Thick Plate / Top Plate / Inner Hood 6.344 3.522 AWl 89317 Closure Plate / Middle Hood 2.095 2.222 AWl 91155 Entry Bottom Perf/ Side Plate / End Plate 5.340 3.964 AWl 99123 Top Thick Plate / Top Plate / Inner Hood 6.089 3.577 AWl 99163 Top Thick Plate / Top Plate / Inner Hood 6.132 3.580 AW1 99131 Top Thick Plate / Top Plate / Inner Hood 5.200 3.635 AWl 93197 Double Side Plate / Top Plate 4.057 2.962 AWl 95617 Double Side Plate / Top Plate 3.940 2.580 AW2 91054 Side Plate / Top Plate 2.040 2.360 AW2 95638 Hood Support / Inner Hood 4.905 2.466 AW2 87633 Side Plate / Brace 3.551 2.892 AW2 90947 Top Thick Plate / Middle Hood / Top Plate 5.513 3.644 15 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 95251 Outer Cover Plate / Outer Hood 6.262 3.775 AW2 102083 Hood Support / Inner Hood 6.351 3.259 AW2 96036 Hood Support / Middle Hood 6.817 3.700 AW2 90460 Hood Support / Inner Hood 6.783 3.920 AW2 85723 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 1.855 3.210 AW2 95632 Hood Support / Inner Hood 5.555 2.835 AW2 99456 Side Plate / Top Plate 2.663 3.317 AW2 94509 Outer End Plate / Outer Hood 4.635 2.745 AW2 95975 Closure Plate / Inner Hood 2.478 4.837 AW2 102707 Top Thick Plate / Inner Hood / Top Plate 5.518 3.075 AW2 85774 Hood Support / Outer Hood 7.017 3.467 AW2 96096 Top Thick Plate / Side Plate / Closure Plate 4.630 5.299 AW2 138250 Tie Bar 3.036 2.989 AW2 91215 Side Plate / Top Plate 1.840 3.051 AW2 101820 Entry Bottom Perf / Side Plate / Outer End Plate 6.156 3.211 AW2 93348 End Plate / Inner Hood 3.746 4.712 AW2 100314 Thin Vane Bank Plate / Hood Support / Outer Base Plate 3.853 4.191 AW2 89650 Side Plate / Brace 5.159 3.763 AW2 103080 Side Plate / Top Plate 3.404 2.999 AW2 91882 Hood Support / Middle Hood 8.450 4.620 AW2 96023 Hood Support / Middle Hood 7.360 3.880 AW2 90445 Hood Support / Inner Hood 7.121 3.832 AW2 85117 Double Side Plate / Top Plate 4.425 3.431 AW2 96132 End Plate / End Plate Ext 6.873 3.954 AW2 96111 End Plate / End Plate Ext 7.287 4.008 AW2 90812 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / Outer End Plate 4.943 3.843 AW2 94569 Outer End Plate / Outer Hood 7.506 4.006 AW2 84197 Middle Base Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 1.839 3.830 AW2 88718 Hood Support / Inner Hood 7.615 3.780 AW2 94523 Outer End Plate / Outer Hood 7.098 4.006 AW2 96017 Hood Support / Middle Hood 8.661 4.504 AW2 87492 Outer Cover Plate / Man Way Overlap 4.474 4.540 AW2 98968 Thin Vane Bank Plate / Hood Support / Middle Base Plate 2.121 4.178 AW2 99311 Hood Support / Outer Hood 9.103 4.747 AW2 87454 Outer Cover Plate / Man Way Overlap 5.801 4.637 AW2 95000 Hood Support / Outer Base Plate/Middle Backing Bar 2.824 4.843 AW2 99429 Hood Support / Middle Hood 7.279 3.860 AW2 88745 Side Plate / Brace 7.491 3.776 AW2 91616 Hood Support / Outer Hood 8.453 4.310 AW2 95264 Outer End Plate / Outer End Plate Ext 7.786 4.081 AW2 90419 Thin Vane Bank Plate / Hood Support / Inner Base Plate 3.724 3.802 16 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 95139 Submerged Drain Channel / Submerged Skirt 3.054 4.829 AW2 92984 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 3.422 4.138 AW2 90508 Entry Bottom Perf/ Side Plate / End Plate 6.927 6.407 AW2 87784 Side Plate / Closure Plate / Exit Top Perf/ Exit Mid Top Perf 9.015 4.650 AW2 99207 Closure Plate / Middle Hood 8.955 4.773 AW2 92995 Thin Vane Bank Plate / Hood Support / Inner Base Plate 2.238 4.444 ANI 81316 Inner Hood 5.151 2.749 ANI 70703 Inner Hood 4.813 2.498 AN1 70645 Inner Hood 5.452 2.667 AN1 70588 Inner Hood 5.220 2.692 ANI 81346 Inner Hood 5.987 3.239 ANI 70672 Inner Hood 5.223 2.651 ANI 81341 Inner Hood 6.590 3.366 ANI 81332 Inner Hood 6.013 3.280 AN1 70653 Inner Hood 5.476 2.768 AN2 70582 Inner Hood 6.484 3.274 AN2 37724 Brace 5.322 3.899 AN2 30488 Middle Hood 6.173 3.210 AN2 34771 Middle Hood 10.016 4.917 AN2 70627 Inner Hood 7.548 3.720 AN2 72678 Inner Hood 7.716 3.820 AN2 34101 Middle Hood 9.817 4.893 AN2 70803 Inner Hood 7.741 3.876 AN2 70172 Inner Hood 7.569 3.951 PW 113554 Upper Support Ring / Support / Seismic Block 1.236 6.003 PW 94143 Side Plate Ext / Inner Base Plate 1.301 9.546 PW 143795 Tie Bar 1.489 6.108 PW 91558 Top Thick Plate / Side Plate / Closure Plate / Top Plate 2.232 5.466 PW 99200 Inner Side Plate / Inner Base Plate 1.676 8.238 PW 85191 Thin Vane Bank Plate / Hood Support / Inner Base Plate 1.791 4.327 PW 93062 Closure Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 2.628 8.541 PW 94498 Outer Cover Plate / Outer Hood 1.922 5.441 PW 90468 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 2.021 4.161 PW 113508 Upper Support Ring / Seismic Block / Support 2.414 10.764 PW 143757 Tie Bar 2.503 7.793 PW 95172 Closure Plate / Inner Hood 2.587 3.960 PW 100298 Thin Vane Bank Plate/Hood Support/Outer Base Plate 2.557 4.104 PW 99455 Side Plate / Top Plate 2.286 3.092 PN 37229 Inner Side Plate 2.202 18.143 XW 93709 Additional Points for Monitoring on Skirt Crack 5.285 8.501 17 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information h XW XW XW 93046 Additional Points for Monitoring on Skirt Crack 92992 Additional Points for Monitoring on Skirt Crack 93710 Additional Points for Monitoring on Skirt Crack 5.762 4.813 5.725 8.724 7.278 8.321 Notes: a: The groups refer to the following categorizations based on the stress analysis in [4]: AWl -set of all nodes on a weld with alternating stress ratios SR-a < 3.5 AW2 -reduced point set (RPS) of nodes on a weld with alternating stress ratios, 3.5 < SR-a < 5.0 AN1 -set of all nodes on a non-weld with alternating stress ratios SR-a < 3.5 AN2 -RPS of nodes on a non-weld with alternating stress ratios, 3.5 < SR-a < 5.0 PW -RPS of nodes on a weld with peak stress ratio, SR-P < 3.0 PN -RPS of nodes on a non-weld with peak stress ratio, SR-P < 3.0 XW -extra nodes selected for monitoring stresses near repaired indications on the skirt b: Node numbers correspond to node indices in the finite element model, for future reference 18 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information C.D.I. Technical Note No. 12-30NP Limit Curves with ACM Rev. 4.1 for the 115% Power Level Basis at Nine Mile Point Unit 2 with the Inboard RCIC Valve Closed Revision 0 Prepared by Continuum Dynamics, Inc.34 Lexington Avenue Ewing, NJ 08618 Prepared under Purchase Order No. 4500428093 for Westinghouse Electric Company LLC Nuclear Services Business Unit 20 International Drive Windsor, CT 06095 Approved by Alan J. Bilanin Prepared by Milton E. Teske September 2012 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table of Contents Section Page T able of C ontents .....................................................................
ii 1. Introduction
............................................................................
1 2 .A pproach ...............................................................................
2 3. L im it C urves ..........................................................................
4 4. R eferences
.............................................................................
13 A ppendix ..............................................................................
14 ii This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 1. Introduction During power ascension of Nine Mile Point Unit 2 (NMP2), from Current Licensed Thermal Power (CLTP) to Extended Power Uprate (EPU), Nine Mile Point Nuclear Station, LLC (NMPNS) is required to monitor the dryer stresses at plant power levels that have not yet been achieved.
Limit curves provide an upper bound safeguard against the potential for dryer stresses becoming higher than allowable, by estimating the not-to-be-exceeded main steam line pressure levels. In the case of NMP2, in-plant main steam line data have been analyzed at 115%power conditions to provide steam dryer hydrodynamic loads with the inboard RCIC valve closed. A real-time finite element model stress analysis has been undertaken on these loads at pre-selected dryer nodal locations.
These loads provide the basis for generation of the limit curves to be used during NMP2 power ascension.
Limit curves allow NMPNS to monitor dryer stress levels, by comparing the main steam line pressure readings -represented in Power Spectral Density (PSD) format -with the upper bound PSD derived from existing in-plant data.This technical note summarizes the limit curves generated from the 115% power data, utilizing Rev. 4.1 of the ACM [1].
This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 2. Approach The limit curve analysis for NMP2, to be used during power ascension, is patterned after the approach followed by Entergy Vermont Yankee (VY) in its power uprate [2]. In the VY analysis, two levels of steam dryer performance criteria were described:
(1) a Level 1 pressure level based on maintaining the ASME allowable alternating stress value on the dryer, and (2) a Level 2 pressure level based on maintaining 80% of the allowable alternating stress value on the dryer. The VY approach is summarized in [3].To develop the limit curves for NMP2, the stress levels in the dryer were calculated for the current plant acoustic signature, and then used to determine how much the acoustic signature could be increased while maintaining stress levels below the stress fatigue limit. During power ascension, strain gage data will be converted to pressure in PSD format at each of the eight main steam line locations, for comparison with the limit curves. The strain gage data will be monitored throughout power ascension to observe the onset of discrete peaks, if they occur.The finite element analysis using the NMP2 115% power data with the inboard RCIC valve closed found a lowest/minimum alternating stress ratio of 2.05, as summarized in Table 1.This stress ratio can be compared to the ratio of 2.39 developed from the 115% power data without closing the inboard RCIC valve [4], but with a composite frequency peak at 92.5 Hz constructed from the 110% power level data, corrected by velocity squared to 115% power, and substituted for the data on MSL B between 92 and 93 Hz, preserving the phase angles of the 115% power level. The minimum stress ratio includes the model bias and uncertainties for specific frequency ranges as summarized in [1]. The results of the ACM Rev. 4.1 analysis, based on Quad Cities Unit 2 in-plant data, are summarized in Table 2 (a negative bias is conservative).
The additional bias and uncertainties, as identified in [5], [6], [7], [8], [9], and [10], are shown in Table 3. SRSS of the uncertainties, added to the ACM bias, results in the total uncertainties shown in Table 4. These uncertainties were applied to the finite element analysis, resulting in the minimum stress ratio of 2.05 for ASME Level A load combinations (see the Appendix for stress ratios at selected dryer nodes).Table 1. Peak Stress Limit Summary for ACM Rev. 4.1 Peak Stress Limit 13,600 psi (Level 1) 10,880 psi (Level 2)Minimum Stress Ratio 2.05 1.64 2 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Table 2. Bias and uncertainty for ACM Rev. 4.1 (3)]]Table 3. NMP2 additional uncertainties (with references cited)[1 (3)]]Table 4. NMP2 total uncertainty (3)]]3 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 3. Limit Curves Limit curves were generated from the in-plant 115% power level strain gage data collected in September 2012 with the inboard RCIC valve closed. These data were filtered across the frequency ranges shown in Table 5 to remove noise and extraneous signal content.The resulting PSD curves for the eight strain gage locations were used to develop the limit curves, shown in Figures 1 to 4. Level 1 limit curves are found by multiplying the 115% power level main steam line pressure PSD traces by the square of the minimum alternating stress ratio, from Table 1, while the Level 2 limit curves are found by multiplying the 115% power level PSD traces by 0.64 of the square of the minimum alternating stress ratio, again from Table 1, as PSD is related to the square of the pressure.Table 5. Exclusion frequencies for NMP2 at 115% power Frequency Range (Hz) Exclusion Cause 0.0 -2.0 Mean 59.9-60.1 EMF Frequency 119.6 -120.3 EMF Frequency 179.8 -180.2 EMF Frequency 148.9- 149.3 Recirculation Vane Passing Frequency 4 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3) ]]Figure 1. Level 1 (black) and Level 2 (red) limit curves for main steam line A, compared against the base curves (blue) for closure of the inboard RCIC valve, over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).5 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[(3)]]Figure 2. Level I (black) and Level 2 (red) limit curves for main steam line B, compared against the base curves (blue) for closure of the inboard RCIC valve, over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).6 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3)]]Figure 3. Level I (black) and Level 2 (red) limit curves for main steam line C, compared against the base curves (blue) for closure of the inboard RCIC valve, over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).7 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[R (3)]]Figure 4. Level 1 (black) and Level 2 (red) limit curves for main steam line D, compared against the base curves (blue) for closure of the inboard RCIC valve, over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).8 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[I (3)]]Figure 5. Comparison between main steam line A pressure signals at 115% power, for closure of the inboard RCIC valve (black curves) and the open valve (red curves), over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).9 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
[[(3)]Figure 6. Comparison between main steam line B pressure signals at 115% power, for closure of the inboard RCIC valve (black curves) and the open valve (red curves), over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).10 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information I[[(3)]]Figure 7. Comparison between main steam line C pressure signals at 115% power, for closure of the inboard RCIC valve (black curves) and the open valve (red curves), over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).11 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information (3 ) 11 Figure 8. Comparison between main steam line D pressure signals at 115% power, for closure of the inboard RCIC valve (black curves) and the open valve (red curves), over the frequency range of interest:
upper strain gage location (top); lower strain gage location (bottom).12 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information
: 4. References
: 1. Continuum Dynamics, Inc. 2011. ACM Rev. 4.1: Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements (Rev. 3). C.D.I. Report No. 10-09 (Proprietary).
: 2. Entergy Nuclear Northeast.
2006. Entergy Vermont Yankee Steam Dryer Monitoring Plan (Rev. 4). Docket 50-271. No. BVY 06-056. Dated 29 June 2006.3. State of Vermont Public Service Board. 2006. Petition of Vermont Department of Public Service for an Investigation into the Reliability of the Steam Dryer and Resulting Performance of the Vermont Yankee Nuclear Power Station under Uprate Conditions.
Docket No. 7195. Hearings held 17-18 August 2006.4. Continuum Dynamics, Inc. 2012. Limit Curves with ACM Rev. 4.1 for the 115% Power Level Basis with 92.5 Hz Peak at Nine Mile Point Unit 2 (Rev. 0). C.D.I. Technical Note No.12-28 (Proprietary).
: 5. Structural Integrity Associates, Inc. 2008. Nine Mile Point Unit 2 Strain Gage Uncertainty Evaluation and Pressure Conversion Factors (Rev. 1). SIA Calculation Package No. NMP-26Q-301.6. Continuum Dynamics, Inc. 2005. Vermont Yankee Instrument Position Uncertainty.
Letter Report Dated 01 August 2005.7. Exelon Nuclear Generating LLC. 2005. An Assessment of the Effects of Uncertainty in the Application of Acoustic Circuit Model Predictions to the Calculation of Stresses in the Replacement Quad Cities Units 1 and 2 Steam Dryers (Rev. 0). Document No. AM-21005-008.8. Continuum Dynamics, Inc. 2007. Finite Element Modeling Bias and Uncertainty Estimates Derived from the Hope Creek Unit 2 Dryer Shaker Test (Rev. 0). C.D.I. Report No. 07-27 (Proprietary).
: 9. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.79.10. NRC Request for Additional Information on the Hope Creek Generating Station, Extended Power Uprate. 2007. RAI No. 14.110.11. Continuum Dynamics, Inc. 2012. Real-Time Monitoring of the Nine Mile Point Steam During Power Ascension (Rev. 0). C.D.I. Technical Note No. 12-17 (Proprietary).
: 11. Continuum Dynamics, Inc. 2011. Stress Evaluation of Nine Mile Point Unit 2 Steam Dryer Using ACM Rev. 4.1 Acoustic Loads (Rev. 0). C.D.I. Report No. 11-04 (Proprietary).
13 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information Appendix:
Real Time Nodal Analysis Results The minimum stress ratio at 115% is 2.050 as shown in Figure 9. Note that to recover a minimum stress ratio of 2.0 at EPU conditions, the minimum stress ratio at CLTP conditions must be 2.Ox 1.17562 = 2.764. The red curve connects the CLTP and EPU points.Nine Mile Point Power Ascension 3 0 4_j Cd 2.8 2.6 2.4 2.2 2 t 100 105 110 115% CLTP Steam Flow 120 Figure 9: Minimum stress ratio track through power ascension:
predicted dryer stresses (black circles);
minimum trend to EPU conditions (red curve); predicted dryer stress for closure of the inboard RCIC valve (open black circles).
EPU = 117.56% CLTP Steam Flow.The real-time stress analysis computes SR-P and SR-a summarized in Table analysis discussed in [ 11 ]. The minimum stress ratio location is shown in bold.Table 6: Real-time stress ratios at 115% Power.6, based on the Group(a) Node(bi Location SR-P SR-a AWl 95267 Hood Support/Outer Cover Plate / Outer Hood 1.642 2.273 AWl 95237 Outer Cover Plate / Outer Hood 4.858 2.697 AWl 95236 Outer Cover Plate / Outer Hood 4.926 2.684 AWl 95238 Outer Cover Plate / Outer Hood 4.863 2.732 AWl 95241 Outer Cover Plate / Outer Hood 4.811 2.764 AWl 95234 Outer Cover Plate / Outer Hood 5.133 2.727 AWl 95242 Outer Cover Plate / Outer Hood 4.801 2.827 AWl 95235 Outer Cover Plate / Outer Hood 5.087 2.771 AWl 99540 Hood Support / Inner Hood 4.274 2.234 14 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AWl 99337 Hood Support / Outer Cover Plate / Outer Hood 2.470 2.506 AWl 99104 Top Thick Plate / Top Plate / Inner Hood 5.199 2.666 AWl 85512 Top Thick Plate / Inner Hood / Top Plate 4.341 2.203 AWl 95233 Outer Cover Plate / Outer Hood 5.244 2.803 AWl 95243 Outer Cover Plate / Outer Hood 4.744 2.898 AWl 99541 Hood Support / Inner Hood 4.399 2.312 AWl 95232 Outer Cover Plate / Outer Hood 5.197 2.823 AWl 99539 Hood Support / Inner Hood 4.389 2.293 AWl 98067 Hood Support / Outer Base Plate / Middle Backing Bar 1.959 2.473 AWl 99130 Top Thick Plate / Top Plate / Inner Hood 4.742 2.776 AWl 95645 Hood Support / Inner Hood 4.690 2.469 AWl 95646 Hood Support Inner Hood 4.757 2.560 AWl 99115 Top Thick Plate / Top Plate / Inner Hood 5.010 2.775 AWl 99132 Top Thick Plate / Top Plate / Inner Hood 4.171 2.784 AWl 95657 Hood Support /Inner Hood 4.813 2.636 AWl 95643 Hood Support / Inner Hood 4.788 2.393 AWl 95644 Hood Support Inner Hood 4.723 2.414 AWl 95428 Hood Support Outer Base Plate / Middle Backing Bar 1.741 2.487 AWl 95642 Hood Support Inner Hood 4.728 2.362 AWl 94626 Hood Support Outer Cover Plate / Outer Hood 1.763 2.515 AWl 91091 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Side Plate Ext / End Plate 4.311 2.654 AWl 90170 Thick Vane Bank Plate / Thin Vane Bank Plate/ Side Plate / Side Plate Ext / End Plate 3.822 2.157 AWl 95658 Hood Support / Inner Hood 4.791 2.637 AWl 95246 Outer Cover Plate / Outer Hood 5.001 3.074 AWl 87478 Outer Cover Plate / Man Way Overlap 5.358 3.069 AWl 95641 Hood Support / Inner Hood 4.718 2.355 AWL 97693 Double Side Plate / Top Plate 3.175 2.133 AWL 95223 Outer Cover Plate / Outer Hood 5.430 2.942 AWl 91154 Entry Bottom Perf/ Side Plate / End Plate 4.817 2.977 AWl 85516 Top Thick Plate / Inner Hood / Top Plate 4.755 2.366 AWl 99122 Top Thick Plate / Top Plate / Inner Hood 5.463 2.882 AWl 89317 Closure Plate / Middle Hood 2.066 2.075 AWl 91155 Entry Bottom Perf/ Side Plate / End Plate 4.829 2.984 AWl 99123 Top Thick Plate / Top Plate / Inner Hood 5.645 2.890 AWl 99163 Top Thick Plate / Top Plate / Inner Hood 5.064 2.868 AWl 99131 Top Thick Plate / Top Plate / Inner Hood 4.977 2.891 AWl 93197 Double Side Plate / Top Plate 3.775 2.720 AWl 95617 Double Side Plate / Top Plate 3.336 2.215 AW2 91054 Side Plate / Top Plate 2.050 2.334 AW2 95638 Hood Support / Inner Hood 4.843 2.413 AW2 87633 Side Plate / Brace 3.421 2.658 AW2 90947 Top Thick Plate / Middle Hood / Top Plate 4.973 2.756 15 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 95251 Outer Cover Plate / Outer Hood 5.294 3.236 AW2 102083 Hood Support / Inner Hood 4.687 2.624 AW2 96036 Hood Support / Middle Hood 5.223 2.761 AW2 90460 Ho d Support / Inner Hood 5.976 3.335 AW2 85723 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 1.750 2.360 AW2 95632 Hood Support / Inner Hood 5.606 2.922 AW2 99456 Side Plate / Top Plate 2.359 2.510 AW2 94509 Outer End Plate / Outer Hood 4.293 2.367 AW2 95975 Closure Plate / Inner Hood 2.368 4.359 AW2 102707 Top Thick Plate/ Ide Plat / Our EdTop Plate 5.005 2.747 AW2 95774 Hood Support / Outer Hood 5.411 2.898 AW2 96096 Top Thick Plate / Side Plate / Closure Plate 4.237 4.473 AW2 138250 Tie Bar 2.747 2.545 AW2 91215 Side Plate / Top Plate 1.693 2.400 AW2 101820 Entry Bottom Perf / Siddlut er End Plate 5.116 2.660 AW2 93348 End Plate / Inner Hood 3.612 3.459 AW2 100314 Thin Vane Bank Plate / Hood Support / Outer Base Plate 3.393 3.516 AW2 89650 Side Plate Brace 3.785 2.787 AW2 103080 Side Plate BTop Plate 2.539 2.050 AW2 91882 Hood Support / Middle Hood 6.759 3.642 AW2 96023 Hood Support / Middle Hood 6.395 3.412 AW2 90445 Hood Support / Inner Hood 5.554 2.974 AW2 85117 Double Side Plate / Top Plate 3.863 2.769 AW2 96132 End Plate / End Plate Ext 5.039 2.759 AW2 96111 End Plate / End Plate Ext 5.241 2.786 AW2 90812 Thick Vane Bank Plate / Thin Vane Bank Plate / Side Plate / Sid Ext / Outer End Plate 3.820 2.820 AW2 94569 Outer End Plate / Outer Hood 5.887 2.971 AW2 84197 Middle Base Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 1.743 2.968 AW2 88718 Hood Support / Inner Hood 6.296 3.277 AW2 94523 Outer End Plate / Outer Hood 7.150 3.812 AW2 96017 Hood Support /Middle Hood 7.421 3.810 AW2 87492 Outer Cover Plate / Man Way Overlap 4.221 3.883 AW2 98968 Thin Vane Bank Plate / Hood Support / Middle Base Plate 2.048 3.208 AW2 99311 Hood Support / Outer Hood 7.229 3.823 AW2 87454 Outer Cover Plate / Man Way Overlap 5.572 4.267 AW2 95000 Hood Support / Outer Base Plate/Middle Backing Bar 2.668 3.888 AW2 99429 Hood Support / Middle Hood 6.822 13.518 AW2 88745 Side Plate / Brace 6.521 3.287 AW2 91616 Hood Support / Outer Hood 7.160 3.634 AW2 95264 Outer End Plate / Outer End Plate Ext 5.938 3.180 AW2 90419 Thin Vane Bank Plate / Hood Support / Inner Base Plate 3.468 3.424 16 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information AW2 95139 Submerged Drain Channel / Submerged Skirt 2.781 3.776 AW2 92984 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 3.088 3.329 AW2 90508 Entry Bottom Perf/ Side Plate / End Plate 6.084 4.818 AW2 87784 Side Plate / Closure Plate / Exit Top Perf/ Exit Mid Top Perf 7.569 3.964 AW2 99207 Closure Plate / Middle Hood 7.909 4.220 AW2 92995 Thin Vane Bank Plate / Hood Support / Inner Base Plate 2.094 3.959 ANI 81316 Inner Hood 4.467 2.314 AN1 70703 Inner Hood 4.391 2.246 ANI 70645 Inner Hood 4.600 2.273 AN1 70588 Inner Hood 4.517 2.299 ANI 81346 Inner Hood 5.148 2.718 ANI 70672 Inner Hood 4.543 2.273 AN1 81341 Inner Hood 5.699 2.784 ANI 81332 Inner Hood 5.262 2.764 AN1 70653 Inner Hood 4.674 2.377 AN2 70582 Inner Hood 5.698 2.793 AN2 37724 Brace 4.604 3.315 AN2 30488 Middle Hood 5.588 2.760 AN2 34771 Middle Hood 7.113 3.480 AN2 70627 Inner Hood 6.710 3.359 AN2 72678 Inner Hood 6.882 3.412 AN2 34101 Middle Hood 7.926 3.889 AN2 70803 Inner Hood 6.406 3.295 AN2 70172 Inner Hood 6.685 3.438 PW 113554 Upper Support Ring / Support / Seismic Block 1.263 6.482 PW 94143 Side Plate Ext / Inner Base Plate 1.276 8.021 PW 143795 Tie Bar 1.473 5.020 PW 91558 Top Thick Plate / Side Plate / Closure Plate / Top Plate 2.150 5.420 PW 99200 Inner Side Plate / Inner Base Plate 1.652 6.969 PW 85191 Thin Vane Bank Plate / Hood Support / Inner Base Plate 1.648 3.250 PW 93062 Closure Plate / Inner Backing Bar Out / Inner Backing Bar / Inner Hood 2.521 6.555 PW 94498 Outer Cover Plate / Outer Hood 1.928 5.756 PW 90468 Hood Support / Middle Base Plate / Inner Backing Bar / Inner Hood 1.911 3.342 PW 113508 Upper Support Ring / Seismic Block / Support 2.319 9.307 PW 143757 Tie Bar 2.414 6.356 PW 95172 Closure Plate / Inner Hood 2.069 2.409 PW 100298 Thin Vane Bank Plate/Hood Support/Outer Base Plate 2.628 3.625 PW 99455 Side Plate / Top Plate 2.074 2.399 PN 37229 Inner Side Plate 2.175 15.560 XW 93709 Additional Points for Monitoring on Skirt Crack 4.873 6.823 17 This Document Does Not Contain Continuum Dynamics, Inc. Proprietary Information XW 93046 Additional Points for Monitoring on Skirt Crack 5.357 7.636 XW 92992 Additional Points for Monitoring on Skirt Crack 4.692 6.773 XW 93710 Additional Points for Monitoring on Skirt Crack 5.707 7.989 Notes: a: The groups refer to the following categorizations based on the stress analysis in [4]: AWl -set of all nodes on a weld with alternating stress ratios SR-a < 3.5 AW2 -reduced point set (RPS) of nodes on a weld with alternating stress ratios, 3.5 < SR-a < 5.0 ANI -set of all nodes on a non-weld with alternating stress ratios SR-a < 3.5 AN2 -RPS of nodes on a non-weld with alternating stress ratios, 3.5 < SR-a < 5.0 PW -RPS of nodes on a weld with peak stress ratio, SR-P < 3.0 PN -RPS of nodes on a non-weld with peak stress ratio, SR-P < 3.0 XW -extra nodes selected for monitoring stresses near repaired indications on the skirt b: Node numbers correspond to node indices in the finite element model, for future reference 18 ATTACHMENT 5 AFFIDAVIT FROM CONTINUUM DYNAMICS, INCORPORATED (CDI)JUSTIFYING WITHHOLDING PROPRIETARY INFORMATION (CDI REPORT NO. 12-20P)Nine Mile Point Nuclear Station, LLC September 26, 2012 4Continuum Dynamics, Inc.(609) 538-0444 (609) 538-0464 fax 34 Lexington Avenue Ewing, NJ 08618-2302 AFFIDAVIT Re: C.D.I. Report No. 12-20P "Acoustic and Low Frequency Hydrodynamic Loads at 115% CLTP Target Power Level on Nine Mile Point Unit 2 Steam Dryer to 250 Hz Using ACM Rev. 4.1," Revision 0 I, Alan J. Bilanin, being duly sworn, depose and state as follows: I1. I hold the position of President and Senior Associate of Continuum Dynamics, Inc. (hereinafter referred to as C.D.I.), and I am authorized to make the request for withholding from Public Record the Information contained in the document described in Paragraph
: 2. This Affidavit is submitted to the Nuclear Regulatory Commission (NRC) pursuant to 10 CFR 2.390(a)(4) based on the fact that the attached information consists of trade secret(s) of C.D.I. and that the NRC will receive the information from C.D.I. under privilege and in confidence.
: 2. The Information sought to be withheld, as transmitted to Constellation Energy Group as attachment to C.D.I. Letter No. 12103 dated 18 September 2012, C.D.I. Report No. 12-20P"Acoustic and Low Frequency Hydrodynamic Loads at 115% CLTP Target Power Level on Nine Mile Point Unit 2 Steam Dryer to 250 Hz Using ACM Rev. 4.1," Revision 0. The proprietary information is identified by its enclosure within pairs of double square brackets ("[[]]"). In each case, the superscript notation (3) refers to Paragraph 3 of this affidavit that provides the basis for the proprietary determination.
: 3. The Information summarizes: (a) a process or method, including supporting data and analysis, where prevention of its use by C.D.I.'s competitors without license from C.D.I. constitutes a competitive advantage over other companies;(b) Information which, if used by a competitor, would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product;(c) Information which discloses patentable subject matter for which it may be desirable to obtain patent protection.
The information sought to be withheld is considered to be proprietary for the reasons set forth in paragraphs 3(a), 3(b) and 3(c) above.4. The Information has been held in confidence by C.D.I., its owner. The Information has consistently been held in confidence by C.D.I. and no public disclosure has been made and it is not available to the public. All disclosures to third parties, which have been limited, have been made pursuant to the terms and conditions contained in C.D.I.'s Nondisclosure Secrecy Agreement which must be fully executed prior to disclosure.
: 5. The Information is a type customarily held in confidence by C.D.I. and there is a rational basis therefore.
The Information is a type, which C.D.I. considers trade secret and is held in confidence by C.D.I. because it constitutes a source of competitive advantage in the competition and performance of such work in the industry.
Public disclosure of the Information is likely to cause substantial harm to C.D.I.'s competitive position and foreclose or reduce the availability of profit-making opportunities.
I declare under penalty of perjury that the foregoing affidavit and the matters stated therein are true and correct to be the best of my knowledge, information and belief.Executed on this !ft day of 2012.Alan J. Bilanin Continuum Dynaics, Inc.Subscribed and sworn before me this day: ______,_____
-en P.9 eister, Notary Public EILEEN P BURMEISTER NOTARY PUBLIC STATE OF NEW JERSEY My Commission Expires May 06, 2017 ATTACHMENT 6 AFFIDAVITS FROM CONTINUUM DYNAMICS, INCORPORATED (CDI)JUSTIFYING WITHHOLDING PROPRIETARY INFORMATION (STEAM DRYER LIMIT CURVE DOCUMENTS)
Affidavits justifying withholding proprietary information are provided for the following Continuum Dynamics, Inc. (CDI) Technical Note documents, in the order listed: 12-13P, Rev.1 12-14P, Rev.0 12-23P, Rev.0 12-22P, Rev.0 12-15P, Rev.0 12-24P, Rev.0 12-16P, Rev.0 12-28P, Rev.0 12-26P, Rev.0 12-30P, Rev.0 Nine Mile Point Nuclear Station, LLC September 26, 2012 4Continuum Dynamics, Inc.(609) 538-0444 (609) 538-0464 fax 34 Lexington Avenue Ewing, NJ 08618-2302 AFFIDAVIT Re: C.D.I. Technical Note No. 12-13P "Limit Curves with ACM Rev. 4.1 for the 100% Power Level Basis at Nine Mile Point Unit 2," Revision 1 1, Alan J. Bilanin, being duly sworn, depose and state as follows: I1. I hold the position of President and Senior Associate of Continuum Dynamics, Inc. (hereinafter referred to as C.D.I.), and I am authorized to make the request for withholding from Public Record the Information contained in the document described in Paragraph
: 2. This Affidavit is submitted to the Nuclear Regulatory Commission (NRC) pursuant to 10 CFR 2.390(a)(4) based on the fact that the attached information consists of trade secret(s) of C.D.I. and that the NRC will receive the information from C.D.I. under privilege and in confidence.
: 2. The Information sought to be withheld, as transmitted to Constellation Energy Group as attachment to C.D.I. Letter No. 12076 dated 29 June 2012, C.D.I. Technical Note No. 12-13P"Limit Curves with ACM Rev. 4.1 for the 100% Power Level Basis at Nine Mile Point Unit 2," Revision 1. The proprietary information is identified by its enclosure within pairs of double square brackets ("[[ ]]"). In each case, the superscript notation (3) refers to Paragraph 3 of this affidavit that provides the basis for the proprietary determination.
: 3. The Information summarizes: (a) a process or method, including supporting data and analysis, where prevention of its use by C.D.I.'s competitors without license from C.D.I. constitutes a competitive advantage over other companies;(b) Information which, if used by a competitor, would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product;(c) Information which discloses patentable subject matter for which it may be desirable to obtain patent protection.
The information sought to be withheld is considered to be proprietary for the reasons set forth in paragraphs 3(a), 3(b) and 3(c) above.4. The Information has been held in confidence by C.D.I., its owner. The Information has consistently been held in confidence by C.D.I. and no public disclosure has been made and it is not available to the public. All disclosures to third parties, which have been limited, have been made pursuant to the terms and conditions contained in C.D.I.'s Nondisclosure Secrecy Agreement which must be fully executed prior to disclosure.
: 5. The Information is a type customarily held in confidence by C.D.I. and there is a rational basis therefore.
The Information is a type, which C.D.I. considers trade secret and is held in confidence by C.D.I. because it constitutes a source of competitive advantage in the competition and performance of such work in the industry.
Public disclosure of the Information is likely to cause substantial harm to C.D.I.'s competitive position and foreclose or reduce the availability of profit-making opportunities.
I declare under penalty of perjury that the foregoing affidavit and the matters stated therein are true and correct to be the best of my knowledge, information and belief.Executed on this::_2 day of -- ,-2012.Alan J. Bilan.Continuum Dynamics, Inc.Subscribed and sworn before me this day: 2 -'-/A~/Public EILEEN P BURMEISTER NOTARY PUBLIC STATE OF NEW JERSEY My Commission Expires May 06,2017 403O t Continuum Dynamics, Inc.(609) 538-0444 (609) 538-0464 fax 34 Lexington Avenue Ewing, NJ 08618-2302 AFFIDAVIT Re: C.D.I. Technical Note No. 12-14P "Limit Curves with ACM Rev. 4.1 for the 105% Power Level Basis at Nine Mile Point Unit 2," Revision 0 I, Milton E. Teske, being duly sworn, depose and state as follows: 1. I hold the position of Senior Associate of Continuum Dynamics, Inc. (hereinafter referred to as C.D.I.), and I am authorized to make the request for withholding from Public Record the Information contained in the document described in Paragraph
: 2. This Affidavit is submitted to the Nuclear Regulatory Commission (NRC) pursuant to 10 CFR 2.390(a)(4) based on the fact that the attached information consists of trade secret(s) of C.D.I. and that the NRC will receive the information from C.D.I. under privilege and in confidence.
: 2. The Information sought to be withheld, as transmitted to Constellation Energy Group as attachment to C.D.I. Letter No. 12078 dated 2 July 2012, C.D.I. Technical Note No. 12-14P"Limit Curves with ACM Rev. 4.1 for the 105% Power Level Basis at Nine Mile Point Unit 2," Revision 0. The proprietary information is identified by its enclosure within pairs of double square brackets ("[[ ]]"). In each case, the superscript notation (3) refers to Paragraph 3 of this affidavit that provides the basis for the proprietary determination.
: 3. The Information summarizes: (a) a process or method, including supporting data and analysis, where prevention of its use by C.D.I.'s competitors without license from C.D.I. constitutes a competitive advantage over other companies;(b) Information which, if used by a competitor, would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product;(c) Information which discloses patentable subject matter for which it may be desirable to obtain patent protection.
The information sought to be withheld is considered to be proprietary for the reasons set forth in paragraphs 3(a), 3(b) and 3(c) above.4. The Information has been held in confidence by C.D.I., its owner. The Information has consistently been held in confidence by C.D.I. and no public disclosure has been made and it is not available to the public. All disclosures to third parties, which have been limited, have been made pursuant to the terms and conditions contained in C.D.I.'s Nondisclosure Secrecy Agreement which must be fully executed prior to disclosure.
: 5. The Information is a type customarily held in confidence by C.D.I. and there is a rational basis therefore.
The Information is a type, which C.D.I. considers trade secret and is held in confidence by C.D.I. because it constitutes a source of competitive advantage in the competition and performance of such work in the industry.
Public disclosure of the Information is likely to cause substantial harm to C.D.I.'s competitive position and foreclose or reduce the availability of profit-making opportunities.
I declare under penalty of perjury that the foregoing affidavit and the matters stated therein are true and correct to be the best of my knowledge, information and belief.Executed on this _ day of -T'U (A 2012.Milton E. Teske Continuum Dynamics, Inc.Subscribed and sworn before me this day: een P. Notary Public EILEEN P BURMEISTER NOTARY PUBLIC STATE OF NEW JERSEY My Commission Expires May 06, 2017 OAk Continuum Dynamics, Inc.(609) 538-0444 (609) 538-0464 fax 34 Lexington Avenue Ewing, NJ 08618-2302 AFFIDAVIT Re: C.D.I. Technical Note No. 12-23P "Limit Curves with ACM Rev. 4.1 for the 105% Power Level Basis at Nine Mile Point Unit 2 with the Inboard RCIC Valve Closed," Revision 0 I, Alan J. Bilanin, being duly sworn, depose and state as follows: 1. I hold the position of President and Senior Associate of Continuum Dynamics, Inc. (hereinafter referred to as C.D.I.), and I am authorized to make the request for withholding from Public Record the Information contained in the document described in Paragraph
: 2. This Affidavit is submitted to the Nuclear Regulatory Commission (NRC) pursuant to 10 CFR 2.390(a)(4) based on the fact that the attached information consists of trade secret(s) of C.D.I. and that the NRC will receive the information from C.D.I. under privilege and in confidence.
: 2. The Information sought to be withheld, as transmitted to Constellation Energy Group as attachment to C.D.I. Letter No. 12098 dated 12 September 2012, C.D.I. Technical Note No. 12-23P "Limit Curves with ACM Rev. 4.1 for the 105% Power Level Basis at Nine Mile Point Unit 2 with the Inboard RCIC Valve Closed," Revision 0. The proprietary information is identified by its enclosure within pairs of double square brackets ("[[ ]]"). In each case, the superscript notation (3) refers to Paragraph 3 of this affidavit that provides the basis for the proprietary determination.
: 3. The Information summarizes: (a) a process or method, including supporting data and analysis, where prevention of its use by C.D.I.'s competitors without license from C.D.I. constitutes a competitive advantage over other companies;(b) Information which, if used by a competitor, would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product;(c) Information which discloses patentable subject matter for which it may be desirable to obtain patent protection.
The information sought to be withheld is considered to be proprietary for the reasons set forth in paragraphs 3(a), 3(b) and 3(c) above.4. The Information has been held in confidence by C.D.I., its owner. The Information has consistently been held in confidence by C.D.I. and no public disclosure has been made and it is not available to the public. All disclosures to third parties, which have been limited, have been made pursuant to the terms and conditions contained in C.D.I.'s Nondisclosure Secrecy Agreement which must be fully executed prior to disclosure.
: 5. The Information is a type customarily held in confidence by C.D.I. and there is a rational basis therefore.
The Information is a type, which C.D.I. considers trade secret and is held in confidence by C.D.I. because it constitutes a source of competitive advantage in the competition and performance of such work in the industry.
Public disclosure of the Information is likely to cause substantial harm to C.D.I.'s competitive position and foreclose or reduce the availability of profit-making opportunities.
I declare under penalty of perjury that the foregoing affidavit and the matters stated therein are true and correct to be the best of my knowledge, information and belief.Executed on this A day of c -/"'-,- 2 0 1 2.Alan J. Bilanin Continuum Dynamics, Inc.A&#xfd;Subscribed and sworn before me this day:/-&#xfd;' )-dl ")--Ee 4nP.u ite r, Notary Public EILEEN P BURMEISTER NOTARY PUBLIC STATE OF NEW JERSEY My Commission Expires May 06, 2017 40W Continuum Dynamics, Inc.(609) 538-0444 (609) 538-0464 fax 34 Lexington Avenue Ewing, NJ 08618-2302 AFFIDAVIT Re: C.D.I. Technical Note No. 12-22P "Limit Curves with ACM Rev. 4.1 for the 107.5% Power Level Basis at Nine Mile Point Unit 2," Revision 0 I, Milton E. Teske, being duly sworn, depose and state as follows: I1. I hold the position of Senior Associate of Continuum Dynamics, Inc. (hereinafter referred to as C.D.I.), and I am authorized to make the request for withholding from Public Record the Information contained in the document described in Paragraph
: 2. This Affidavit is submitted to the Nuclear Regulatory Commission (NRC) pursuant to 10 CFR 2.390(a)(4) based on the fact that the attached information consists of trade secret(s) of C.D.I. and that the NRC will receive the information from C.D.I. under privilege and in confidence.
: 2. The Information sought to be withheld, as transmitted to Constellation Energy Group as attachment to C.D.I. Letter No. 12080 dated 10 July 2012, C.D.I. Technical Note No. 12-22P"Limit Curves with ACM Rev. 4.1 for the 107.5% Power Level Basis at Nine Mile Point Unit 2," Revision 0. The proprietary information is identified by its enclosure within pairs of double square brackets ("[[ ]]"). In each case, the superscript notation (3) refers to Paragraph 3 of this affidavit that provides the basis for the proprietary determination.
: 3. The Information summarizes: (a) a process or method, including supporting data and analysis, where prevention of its use by C.D.I.'s competitors without license from C.D.I. constitutes a competitive advantage over other companies;(b) Information which, if used by a competitor, would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product;(c) Information which discloses patentable subject matter for which it may be desirable to obtain patent protection.
The information sought to be withheld is considered to be proprietary for the reasons set forth in paragraphs 3(a), 3(b) and 3(c) above.4. The Information has been held in confidence by C.D.I., its owner. The Information has consistently been held in confidence by C.D.I. and no public disclosure has been made and it is not available to the public. All disclosures to third parties, which have been limited, have been made pursuant to the terms and conditions contained in C.D.I.'s Nondisclosure Secrecy Agreement which must be fully executed prior to disclosure.
: 5. The Information is a type customarily held in confidence by C.D.I. and there is a rational basis therefore.
The Information is a type, which C.D.I. considers trade secret and is held in confidence by C.D.I. because it constitutes a source of competitive advantage in the competition and performance of such work in the industry.
Public disclosure of the Information is likely to cause substantial harm to C.D.I.'s competitive position and foreclose or reduce the availability of profit-making opportunities.
I declare under penalty of perjury that the foregoing affidavit and the matters stated therein are true and correct to be the best of my knowledge, information and belief.Executed on this IA- day of "A!1 2012.Milton E. Teske Continuum Dynamics, Inc.Subscribed and sworn before me this day:/c~, Zo/~BarbA Agans, Notary Public BARBARA A AGANS ID # 2 2 01170 NOTARY pUBLIC STATE OF NEW JERSEY My Commission EXPOS May 6, 20i7 4MAD] Continuum Dynamics, Inc.(609) 538-0444 (609) 538-0464 fax 34 Lexington Avenue Ewing, NJ 08618-2302 AFFIDAVIT Re: C.D.I. Technical Note No. 12-15P "Limit Curves with ACM Rev. 4.1 for the 110% Power Level Basis at Nine Mile Point Unit 2," Revision 0 I, Milton E. Teske, being duly sworn, depose and state as follows: 1. I hold the position of Senior Associate of Continuum Dynamics, Inc. (hereinafter referred to as C.D.I.), and I am authorized to make the request for withholding from Public Record the Information contained in the document described in Paragraph
: 2. This Affidavit is submitted to the Nuclear Regulatory Commission (NRC) pursuant to 10 CFR 2.390(a)(4) based on the fact that the attached information consists of trade secret(s) of C.D.I. and that the NRC will receive the information from C.D.I. under privilege and in confidence.
: 2. The Information sought to be withheld, as transmitted to Constellation Energy Group as attachment to C.D.I. Letter No. 12080 dated 10 July 2012, C.D.I. Technical Note No. 12-22P"Limit Curves with ACM Rev. 4.1 for the 110% Power Level Basis at Nine Mile Point Unit 2," Revision 0. The proprietary information is identified by its enclosure within pairs of double square brackets ("[[ ]]"). In each case, the superscript notation (3) refers to Paragraph 3 of this affidavit that provides the basis for the proprietary determination.
: 3. The Information summarizes: (a) a process or method, including supporting data and analysis, where prevention of its use by C.D.I.'s competitors without license from C.D.I. constitutes a competitive advantage over other companies;(b) Information which, if used by a competitor, would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product;(c) Information which discloses patentable subject matter for which it may be desirable to obtain patent protection.
The information sought to be withheld is considered to be proprietary for the reasons set forth in paragraphs 3(a), 3(b) and 3(c) above.4. The Information has been held in confidence by C.D.I., its owner. The Information has consistently been held in confidence by C.D.I. and no public disclosure has been made and it is not available to the public. All disclosures to third parties, which have been limited, have been made pursuant to the terms and conditions contained in C.D.I.'s Nondisclosure Secrecy Agreement which must be fully executed prior to disclosure.
: 5. The Information is a type customarily held in confidence by C.D.I. and there is a rational basis therefore.
The Information is a type, which C.D.I. considers trade secret and is held in confidence by C.D.I. because it constitutes a source of competitive advantage in the competition and performance of such work in the industry.
Public disclosure of the Information is likely to cause substantial harm to C.D.I.'s competitive position and foreclose or reduce the availability of profit-making opportunities.
I declare under penalty of perjury that the foregoing affidavit and the matters stated therein are true and correct to be the best of my knowledge, information and belief.Executed on this 1-2-V day of 2012.Milt n E. Teske Continuum Dynamics, Inc.0. " Subscribed and sworn before me this day: Barbara A. Agans, Notary Public 1,:2, .2- 01.2-/)BARBARA A AGANS ID # 2201170 NOTARY PUBLIC STATE OF NEW JERSEY My Commission Expires May 6, 2017 40W Continuum Dynamics, Inc.(609) 538-0444 (609) 538-0464 fax 34 Lexington Avenue Ewing, NJ 08618-2302 AFFIDAVIT Re: C.D.I. Technical Note No. 12-24P "Limit Curves with ACM Rev. 4.1 for the 112.5% Power Level Basis at Nine Mile Point Unit 2," Revision 0 I, Alan J. Bilanin, being duly sworn, depose and state as follows: 1. I hold the position of President and Senior Associate of Continuum Dynamics, Inc. (hereinafter referred to as C.D.I.), and I am authorized to make the request for withholding from Public Record the Information contained in the document described in Paragraph
: 2. This Affidavit is submitted to the Nuclear Regulatory Commission (NRC) pursuant to 10 CFR 2.390(a)(4) based on the fact that the attached information consists of trade secret(s) of C.D.I. and that the NRC will receive the information from C.D.I. under privilege and in confidence.
: 2. The Information sought to be withheld, as transmitted to Constellation Energy Group as attachment to C.D.I. Letter No. 12084 dated 2 August 2012, C.D.I. Technical Note No. 12-24P"Limit Curves with ACM Rev. 4.1 for the 112.5% Power Level Basis at Nine Mile Point Unit 2," Revision 0. The proprietary information is identified by its enclosure within pairs of double square brackets ("[[ ]]"). In each case, the superscript notation (3) refers to Paragraph 3 of this affidavit that provides the basis for the proprietary determination.
: 3. The Information summarizes: (a) a process or method, including supporting data and analysis, where prevention of its use by C.D.I.'s competitors without license from C.D.I. constitutes a competitive advantage over other companies;(b) Information which, if used by a competitor, would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product;(c) Information which discloses patentable subject matter for which it may be desirable to obtain patent protection.
The information sought to be withheld is considered to be proprietary for the reasons set forth in paragraphs 3(a), 3(b) and 3(c) above.4. The Information has been held in confidence by C.D.I., its owner. The Information has consistently been held in confidence by C.D.I. and no public disclosure has been made and it is not available to the public. All disclosures to third parties, which have been limited, have been made pursuant to the terms and conditions contained in C.D.I.'s Nondisclosure Secrecy Agreement which must be fully executed prior to disclosure.
: 5. The Information is a type customarily held in confidence by C.D.I. and there is a rational basis therefore.
The Information is a type, which C.D.I. considers trade secret and is held in confidence by C.D.I. because it constitutes a source of competitive advantage in the competition and performance of such work in the industry.
Public disclosure of the Information is likely to cause substantial harm to C.D.I.'s competitive position and foreclose or reduce the availability of profit-making opportunities.
I declare under penalty of perjury that the foregoing affidavit and the matters stated therein are true and correct to be the best of my knowledge, information and belief.Executed on this _ jday of ) L 2012.Alan J. Bilanin Continuum Dynamii Inc.Subscribed and sworn before me this day: C.;i&#xfd;en P. Boeister, Notary Public EILEEN P BURMEISTER NOTARY PUBLIC STATE OF NEW JERSEY Aly Commission Expires May 06, 2017 4Continuum Dynamics, Inc.(609) 538-0444 (609) 538-0464 fax 34 Lexington Avenue Ewing, NJ 08618-2302 AFFIDAVIT Re: C.D.I. Technical Note No. 12-16P "Limit Curves with ACM Rev. 4.1 for the 115% Power Level Basis at Nine Mile Point Unit 2," Revision 0 I, Milton E. Teske, being duly sworn, depose and state as follows: 1. I hold the position of Senior Associate of Continuum Dynamics, Inc. (hereinafter referred to as C.D.I.), and I am authorized to make the request for withholding from Public Record the Information contained in the document described in Paragraph
: 2. This Affidavit is submitted to the Nuclear Regulatory Commission (NRC) pursuant to 10 CFR 2.390(a)(4) based on the fact that the attached information consists of trade secret(s) of C.D.I. and that the NRC will receive the information from C.D.I. under privilege and in confidence.
: 2. The Information sought to be withheld, as transmitted to Constellation Energy Group as attachment to C.D.I. Letter No. 12083 dated 23 July 2012, C.D.I. Technical Note No. 12-16P"Limit Curves with ACM Rev. 4.1 for the 115% Power Level Basis at Nine Mile Point Unit 2," Revision 0. The proprietary information is identified by its enclosure within pairs of double square brackets ("[[ ]]"). In each case, the superscript notation (3) refers to Paragraph 3 of this affidavit that provides the basis for the proprietary determination.
: 3. The Information summarizes: (a) a process or method, including supporting data and analysis, where prevention of its use by C.D.I.'s competitors without license from C.D.I. constitutes a competitive advantage over other companies;(b) Information which, if used by a competitor, would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product;(c) Information which discloses patentable subject matter for which it may be desirable to obtain patent protection.
The information sought to be withheld is considered to be proprietary for the reasons set forth in paragraphs 3(a), 3(b) and 3(c) above.4. The Information has been held in confidence by C.D.I., its owner. The Information has consistently been held in confidence by C.D.I. and no public disclosure has been made and it is not available to the public. All disclosures to third parties, which have been limited, have been made pursuant to the terms and conditions contained in C.D.I.'s Nondisclosure Secrecy Agreement which must be fully executed prior to disclosure.
: 5. The Information is a type customarily held in confidence by C.D.I. and there is a rational basis therefore, The Information is a type, which C.D.I. considers trade secret and is held in confidence by C.D.I. because it constitutes a source of competitive advantage in the competition and performance of such work in the industry.
Public disclosure of the Information is likely to cause substantial harm to C.D.I.'s competitive position and foreclose or reduce the availability of profit-making opportunities.
I declare under penalty of perjury that the foregoing affidavit and the matters stated therein are true and correct to be the best of my knowledge, information and belief.Executed on this ___ day of 2012.Milt n E. Teske Continuum Dynamics, Inc.Subscribed and sworn before me this day: a f- D 2 .-6)""Y, m eiste~tayPublic EILEEN P BURMEISTER NOTARY PUBLIC STATE OF NEW JERSEY My Commission Expires May 06, 2017 4"AD- Continuum Dynamics, Inc.(609) 538-0444 (609) 538-0464 fax 34 Lexington Avenue Ewing, NJ 08618-2302 AFFIDAVIT Re: C.D.I. Technical Note No. 12-28P "Limit Curves with ACM Rev. 4.1 for the 115% Power Level Basis with 92.5 Hz Peak at Nine Mile Point Unit 2," Revision 0 I, Alan J. Bilanin, being duly sworn, depose and state as follows: I1. I hold the position of President and Senior Associate of Continuum Dynamics, Inc. (hereinafter referred to as C.D.I.), and I am authorized to make the request for withholding from Public Record the Information contained in the document described in Paragraph
: 2. This Affidavit is submitted to the Nuclear Regulatory Commission (NRC) pursuant to 10 CFR 2.390(a)(4) based on the fact that the attached information consists of trade secret(s) of C.D.I. and that the NRC will receive the information from C.D.I. under privilege and in confidence.
: 2. The Information sought to be withheld, as transmitted to Constellation Energy Group as attachment to C.D.I. Letter No. 12099 dated 12 September 2012, C.D.I. Technical Note No. 12-28P "Limit Curves with ACM Rev. 4.1 for the 115% Power Level Basis with 92.5 Hz Peak at Nine Mile Point Unit 2," Revision 0. The proprietary information is identified by its enclosure within pairs of double square brackets ("[[ ]]"). In each case, the superscript notation (3)refers to Paragraph 3 of this affidavit that provides the basis for the proprietary determination.
: 3. The Information summarizes: (a) a process or method, including supporting data and analysis, where prevention of its use by C.D.I.'s competitors without license from C.D.I. constitutes a competitive advantage over other companies;(b) Information which, if used by a competitor, would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product;(c) Information which discloses patentable subject matter for which it may be desirable to obtain patent protection.
The information sought to be withheld is considered to be proprietary for the reasons set forth in paragraphs 3(a), 3(b) and 3(c) above.4. The Information has been held in confidence by C.D.I., its owner. The Information has consistently been held in confidence by C.D.I. and no public disclosure has been made and it is not available to the public. All disclosures to third parties, which have been limited, have been made pursuant to the terms and conditions contained in C.D.I.'s Nondisclosure Secrecy Agreement which must be fully executed prior to disclosure.
: 5. The Information is a type customarily held in confidence by C.D.I. and there is a rational basis therefore.
The Information is a type, which C.D.I. considers trade secret and is held in confidence by C.D.I. because it constitutes a source of competitive advantage in the competition and performance of such work in the industry.
Public disclosure of the Information is likely to cause substantial harm to C.D.I.'s competitive position and foreclose or reduce the availability of profit-making opportunities.
I declare under penalty of perjury that the foregoing affidavit and the matters stated therein are true and correct to be the best of my knowledge, information and belief.Executed on this 7. day of 2012.Alan J. BilaninI Continuum Dynamics, Inc.C tZe.-.& //~*Subscribed and sworn before me this day: Eileen P. Burmeister, Notary Public EILEEN P BURMEISTER NOTARY PUBLIC STATE OF NEW JERSEY My Commission Expires May 06,2017 4Continuum Dynamics, Inc.(609) 538-0444 (609) 538-0464 fax 34 Lexington Avenue Ewing, NJ 08618-2302 AFFIDAVIT Re: C.D.I. Technical Note No. 12-26P "Limit Curves with ACM Rev. 4.1 for the 110% Power Level Basis at Nine Mile Point Unit 2 with the Inboard RCIC Valve Closed," Revision 0 I, Alan J. Bilanin, being duly sworn, depose and state as follows: I1. I hold the position of President and Senior Associate of Continuum Dynamics, Inc. (hereinafter referred to as C.D.I.), and I am authorized to make the request for withholding from Public Record the Information contained in the document described in Paragraph
: 2. This Affidavit is submitted to the Nuclear Regulatory Commission (NRC) pursuant to 10 CFR 2.390(a)(4) based on the fact that the attached information consists of trade secret(s) of C.D.I. and that the NRC will receive the information from C.D.I. under privilege and in confidence.
: 2. The Information sought to be withheld, as transmitted to Constellation Energy Group as attachment to C.D.I. Letter No. 12100 dated 12 September 2012, C.D.I. Technical Note No. 12-26P "Limit Curves with ACM Rev. 4.1 for the 110% Power Level Basis at Nine Mile Point Unit 2 with the Inboard RCIC Valve Closed," Revision 0. The proprietary information is identified by its enclosure within pairs of double square brackets ("[[ f]"). In each case, the superscript notation (3) refers to Paragraph 3 of this affidavit that provides the basis for the proprietary determination.
: 3. The Information summarizes: (a) a process or method, including supporting data and analysis, where prevention of its use by C.D.I.'s competitors without license from C.D.I. constitutes a competitive advantage over other companies;(b) Information which, if used by a competitor, would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product;(c) Information which discloses patentable subject matter for which it may be desirable to obtain patent protection.
The information sought to be withheld is considered to be proprietary for the reasons set forth in paragraphs 3(a), 3(b) and 3(c) above.4. The Information has been held in confidence by C.D.I., its owner. The Information has consistently been held in confidence by C.D.I. and no public disclosure has been made and it is not available to the public. All disclosures to third parties, which have been limited, have been made pursuant to the terms and conditions contained in C.D.I.'s Nondisclosure Secrecy Agreement which must be fully executed prior to disclosure.
: 5. The Information is a type customarily held in confidence by C.D.I. and there is a rational basis therefore.
The Information is a type, which C.D.I. considers trade secret and is held in confidence by C.D.I. because it constitutes a source of competitive advantage in the competition and performance of such work in the industry.
Public disclosure of the Information is likely to cause substantial harm to C.D.I.'s competitive position and foreclose or reduce the availability of profit-making opportunities.
I declare under penalty of perjury that the foregoing affidavit and the matters stated therein are true and correct to be the best of my knowledge, information and belief.Executed on this /c4 day of 7 7nWt- -2012.Alan J. Bilanin/Continuum Dynamics, Inc.Subscribed and sworn before me this day: ___-___,,___,__
-_,_.._Bi en Burmster, Ntotary Public EILEEN P BURMEISTER NOTARY PUBLIC STATE OF NEW JERSEY My Commission Expires May 06,2017 4Continuum Dynamics, Inc.(609) 538-0444 (609) 538-0464 fax 34 Lexington Avenue Ewing, NJ 08618-2302 AFFIDAVIT Re: C.D.I. Technical Note No. 12-30P "Limit Curves with ACM Rev. 4.1 for the 115% Power Level Basis at Nine Mile Point Unit 2 with the Inboard RCIC Valve Closed," Revision 0 I, Alan J. Bilanin, being duly sworn, depose and state as follows: 1 .I hold the position of President and Senior Associate of Continuum Dynamics, Inc. (hereinafter referred to as C.D.I.), and I am authorized to make the request for withholding from Public Record the Information contained in the document described in Paragraph
: 2. This Affidavit is submitted to the Nuclear Regulatory Commission (NRC) pursuant to 10 CFR 2.390(a)(4) based on the fact that the attached information consists of trade secret(s) of C.D.I. and that the NRC will receive the information from C.D.I. under privilege and in confidence.
: 2. The Information sought to be withheld, as transmitted to Constellation Energy Group as attachment to C.D.I. Letter No. 12097 dated 12 September 2012, C.D.I. Technical Note No. 12-30P "Limit Curves with ACM Rev. 4.1 for the 115% Power Level Basis at Nine Mile Point Unit 2 with the Inboard RCIC Valve Closed," Revision 0. The proprietary information is identified by its enclosure within pairs of double square brackets ("[[ ]]"). In each case, the superscript notation (3) refers to Paragraph 3 of this affidavit that provides the basis for the proprietary determination.
: 3. The Information summarizes: (a) a process or method, including supporting data and analysis, where prevention of its use by C.D.I.'s competitors without license from C.D.I. constitutes a competitive advantage over other companies;(b) Information which, if used by a competitor, would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product;(c) Information which discloses patentable subject matter for which it may be desirable to obtain patent protection.
The information sought to be withheld is considered to be proprietary for the reasons set forth in paragraphs 3(a), 3(b) and 3(c) above.4. The Information has been held in confidence by C.D.I., its owner. The Information has consistently been held in confidence by C.D.I. and no public disclosure has been made and it is not available to the public. All disclosures to third parties, which have been limited, have been made pursuant to the terms and conditions contained in C.D.I.'s Nondisclosure Secrecy Agreement which must be fully executed prior to disclosure.
: 5. The Information is a type customarily held in confidence by C.D.I. and there is a rational basis therefore.
The Information is a type, which C.D.I. considers trade secret and is held in confidence by C.D.I. because it constitutes a source of competitive advantage in the competition and performance of such work in the industry.
Public disclosure of the Information is likely to cause substantial harm to C.D.I.'s competitive position and foreclose or reduce the availability of profit-making opportunities.
I declare under penalty of perjury that the foregoing affidavit and the matters stated therein are true and correct to be the best of my knowledge, information and belief.Executed on this day of7"_R-7_--/, eA,._ 2012.Alan J. Bilanln Continuum Dynamics, Inc.Subscribed and sworn before me this day: -,k,4,----'
/* .E P Bu ueister, Notary Public BLEEN P BURMEISTER NOTARY PUBLIC STATE OF NEW JERSEY My Commission Expires May 06, 2017}}

Latest revision as of 22:05, 11 January 2025

Attachment 4, Steam Dryer Limit Curves CDI Technical Note No. 12-13NP, Limit Curves with ACM Rev. 4.1 for the 100% Power Level Basis at Nine Mile Point, Unit 2, Revision 1
ML12284A185
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 06/30/2012
From: Teske M
Continuum Dynamics
To:
Office of Nuclear Reactor Regulation, Westinghouse
References
12-13NP, Rev. 1
Download: ML12284A185 (207)
v • d • e


Text

Retrieved from "https://kanterella.com/w/index.php?title=ML12284A185&oldid=5250229"