ML082830074
| ML082830074 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 07/31/2008 |
| From: | GE-Hitachi Nuclear Energy Americas |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| DRF 0000-0072-9808, PLA-6408 GE-NE 0000-0085-2413 NP-R0 | |
| Download: ML082830074 (58) | |
Text
{{#Wiki_filter:A HITACHI GE Hitachi Nuclear Energy 3901 Castle Hayne Rd Wilmington, NC 28401 Non-Proprietary Version GE-NE 0000-0085-2413 NP-RO DRF 0000-0072-9808 DRF Section 0000-0085-2413 Revision 2 Class I July 2008 Engineering Report Susquehanna Unit 1 Replacement Steam Dryer Vibration Instrumentation Program NRC Summary Test Report GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION IMPORTANT NOTICE REGARDING THE CONTENTS OF THIS REPORT Please Read Carefully NON-PROPRIETARY NOTICE This is a non-proprietary version of GEH document GE-NE-0000-0085-2413-P-RO, from which the proprietary information has been removed. Portions of the document that have been removed are identified by white space within double square brackets, as shown herei .IMPORTANT NOTICE REGARDING CONTENTS OF THIS REPORT Please Read Carefully The only undertakings of the GE Hitachi Nuclear Energy (GEH) respecting information in this document are contained in the contract between the company receiving this document and GEH. Nothing contained in this document shall be construed as changing the applicable contract. The use of this information by anyone other than a customer authorized by GEH to have this document, or for any purpose other than that for which it is intended, is not authorized. With respect to any unauthorized use, GEH makes no representation or warranty, and assumes no liability as to the completeness, accuracy or usefulness of the information contained in this document, or that its use may not infringe privately owned rights i GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION REVISION
SUMMARY
0 None ii GE-NE-0OO0-0085-2413-N P-R0 NON-PROPRIETARY INFORMATION TABLE OF CONTENTS REV ISION SUM M ARY ........................................................................................................... ii 1.0 D ISCU SSION ................................................................................................................. 1 1.1 Outer H ood Response; Sensors [[ 1] ......................................... .4 1.2 Upper Dryer 0 D egree H ood Response; [[ ] .................................. 5 1.3 Lower Dryer, Skirt and Drain Channel and Lower Ring Response; [[11 .............................................................................................. .5 1.4 Increased Core Flow Sw eeps ...................................................................................... 6 1.5 Sensor Perform ance ..................................................................................................... 8 1.6 1985 Benchm ark Com parison .................................................................................... 8 1.7 Dryer Rocking .................................................................................................................. 9 1.8 Sum m ary ........................................................................................................................ 10 2.0 REFEREN CES .............................................................................................................. 11 Appendix A SSES Replacement Dryer Instrumentation Locations ..................................... 41 Appendix B Plant Conditions .............................................................................................. 48 iii GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure .13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23a Figure 23b Figure 23c Figure 24 Figure 25 Figure 26 Figure 27 Figure A- 1 Figure A-2 Figure A-3 Figure A-4[] Power Ascension Trend Plot ................................. 12]] Power Ascension Trend Plot ................................. 13]] Power Ascension Trend Plot ................................. 14]] Power Ascension Trend Plot ................................. 15]] Power Ascension Trend Plot ................................. 16]] Power Ascension Trend Plot ................................. 17[] Power Ascension Trend Plot ................................. 18 E[ ]] Power Ascension Trend Plot ................................. 19 Er ]] Power Ascension Trend Plot ................................. 20 Er ]] Power Ascension Trend Plot ............................ 21[[ ]] PSD Curves ........................................................... 22 EE ]] PSD Curves ........................................................... 23 E[ ]] PSD Curves ........................................................... 24 E[ 3] PSD Curves ........................................................... 25 Er ]] PSD Curves ........................................................... 26 E[ ]] PSD Curves ........................................................... 27 Er 3] PSD Curves ........................................................... 28 Er ]] PSD Curves ........................................................... 29 Er ]] PSD Curves ........................................................... 30 Er 1] PSD Curves ....................................................... 31 Er ]] VPF Peak Amplitudes ............................................ 32 Er ]] VPF Peak Amplitudes ................................................. 33 Er 3] Acceptance Limit vs. Core Flow ............................. 34 Er ]] Acceptance Limit vs. Core Flow ............................. 35 Er ]] Acceptance Limit vs. Core Flow ............................. 36 1985 vs 2008E[ ]] Comparison ......................................................... 37 1985 vs 2008 90deg Coverplate [[ ]] Data ............................... 38 1985 vs 2008 270deg Coverplate E[ ]] Data ............................. 39 2008 Support Ring Er ]] ......... 40 D ryer Top V iew ................................................................................... 44 E levation 90' V iew ............................................................................... 45 Elevation 00 V iew ................................................................................. 46 Elevation 270' V iew ............................................................................. 47 iv GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION List of Tables Table 1 Maximum Strain and Acceleration Amplitudes Expressed as a Ratio of the A cceptable Lim its at 3733 M W th ............................................................................... 1 Table 2 RMS Response at VPF Peaks [[ ]] .................................... 7 Table 3 Comparison of Level 1 Acceptance Values at Low and High VPF Vibration... 8 Table 4 [[ ]] ................................ 9 Table A-I Description of [[ ]] Sensors .............. 42 Table B-I Plant Conditions: IA, 1B, IC, ID, 1E, IF, IG, 1H, 1i, IJ ....................... 49 Table B-2 Plant Conditions: 2A.3, 2A.1, 2A.2, 2A.4, 2B.3, 2B.1, 2B.2, 2B. ......... 50 Table B-3 Plant Conditions: 3A & 3B (91 -105 Mlb/hr) ..................................... 51 Table B-4 Plant Conditions: 3C & 3D (105 -108 Mlb/hr) .................................. 52 v G E-N E-OOOO-0085-2413-N P-RO NON-PROPRIETARY INFORMATION
1.0 DISCUSSION
This report provides a summary of the Susquehanna Steam Electric Station Unit 1 (SSES)replacement steam dryer instrumentation measurements during the power ascension up to 3733 Megawatt Thermal Power (MWth). 3733 MWth is 94.4% of the licensed Extended Power Uprate (EPU) power level. This report includes a summary of testing from power level of 580 MWth through 3733 MWth, results of Main Steam Isolation Valve (MSIV) closure testing that simulated the steam flow conditions at 95% EPU and 102% EPU, and results of core flow sweep tests that quantify the contribution of recirculation pump Vane Passing Frequency (VPF) on dryer vibration. The dryer instrumentation has limited life in the reactor pressure vessel. It is designed to be removed after the current operating cycle to eliminate the long-term potential for loose parts.A summary of test conditions along with pertinent plant data during the test are summarized in Appendix B. Table 1 shows the maximum observed strain and acceleration amplitudes as a percent of the acceptance limits provided in Reference
- 3. At a plant power level of 3733 MWth, all values of strain and acceleration are below the Level 2 acceptance limits.Sesro eel1%o ee Table 1 Maximum Strain and Acceleration Amplitudes Expressed as a Ratio of the Acceptable Limits at 3733 MWth Replacement Steam Dryer Instrumentation The replacement steam dryer installed in SSES was instrumented with [[]] The dryer instrumentation locations are documented in Appendix A of this report.I GE-NE-OOOO-0085-2413-NP-RO NON-PROPRIETARY INFORMATION Power Ascension Tests Figures 1 through 10 provide trend plots of [[ J] versus steam flow for all power ascension test points up through 3733 MWth (Test Series 1). [[1]MSIV Slow Closure Tests There were four Main Steam Isolation Valve (MSIV) slow closure tests performed at about 2908 MWth and again at 3074 MWth (Test Series 2). These tests consisted of the closure of an 2 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION individual MSIV, with the test repeated for each steam line. These test conditions resulted in steam flows through the three open MS lines equivalent to 95% and 102% of the projected full EPU steam flows, respectively.
The tests at 3074 MWth approximate the dryer pressure loading expected at full EPU conditions. The tests at 2908 MWth were performed to benchmark the MSIV closure approximation against the four open MS line measurements taken at 3733 MWth.The two green symbols on Figures 1 through 10 represent the strain and acceleration values measured during the MSIV closure tests. [[Figures 11 through 20 provide power spectral density (PSD) plots developed from sensor data.For trending purposes, there are four test conditions included in each PSD plot. The dark solid black line represents the curve for test condition 1J, the test condition at approximately 3733 MWth. The blue and the green solid lines provide the response for the two previous power ascension steps at 3484 MWth and 3612 MWth (87% and 91% EPU steam flow, respectively). The dotted blue and dotted magenta lines provide the results for the MSIV closure test conditions. Comparison of the test condition 2A curves with the test condition 3733 MWth curves demonstrates that the MSIV closure test does a very good job of simulating the dryer response with similar MSL steam flow conditions. Er 3 G E- N E-0000-0085-2413-N P-RO NON-PROPRIETARY INFORMATION The profile of the monitoring curves reflects both the acoustic load definition and the response of the dryer structural model. The majority of the acoustic loads at SSES are below 40 Hz. Based on a comparison with the on-dryer measurements taken on the original Unit 1 dryer in 1985, GEH recognized that the load definition used in the replacement dryer structural analysis under-predicted the low frequency load amplitude and addressed this by designing the dryer with thicker components to keep the fundamental modes of the hood above the known low frequency loads. As a result, there is no indication of structural resonance at low frequencies. [[11 1.1 Outer Hood Response; Sensors [[11 Figures 13, 14, 16 and 20 provide [[The power ascension testing included MSIV closure tests at 2908 and 3074 MWth. This resulted in flows in the open main steam lines equivalent to 95% and 102% of full EPU loads. Under these conditions the strain range remained well below the Level 2 acceptance limits for the hood sensors. The MSIV test data is also included in the PSD plots and shows that there was very little change in the acoustic response frequencies at the EPU flow conditions. There is one new acoustic load that appeared at [closure tests. This load is due to [[]] during the MSIV 11 There appears to be some electrical noise in the strain gage [[ ]] signals near 180 Hz. These signals were observed in low power testing with no flow. Conservatively, there has 4 GE-N E-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION been no filtering of the electrical noise from the strain data between 5 and 240 Hz that was used to calculate the strain ranges or PSD curves presented in this evaluation.
1.2 Upper
Dryer 0 Degree Hood Response; [[ ]]ER]] This is a region where fatigue cracks were repaired in the original SSES dryers for both units in the 2005 to 2006 time period. [[]] As shown in the trend and PSD plots for this sensor (Figure 7 and Figure 17, respectively), the replacement dryer is quite stiff in this region and there is minimal structural response under FIV loads. The only high frequency response of note is the minimal response to the [[ 1]acoustic load under the MSIV closure conditions. The 180 Hz electrical noise is also present in the measurements for this sensor.Er 1.3 Lower Dryer, Skirt and Drain Channel and Lower Ring Response; [[Figures 11, 12, 15, and 19 show the response of the lower section of the dryer [[1] As shown in these figures, the amplitude of the dryer response in the frequency range below 30 Hz is greater than predicted. Conversely, the response in the 80 Hz frequency range is lower than predicted. The differences between the predicted and measured response are attributed to the load definition under-predicting the amplitude at low frequencies [[ ]]The acoustic load peak that developed at approximately 220 Hz during the MSIV closure tests is present on all four sensors, but is not a substantial contributor to the total strain response. EF]] Based on the trends and the results of MSIV tests, all [[ ]sensors indicate that there is margin in the current acceptance limits for operation through full EPU. Sensor. [[ ]] is projected to have the smallest margin. As shown in Figure 2, the Er ]] sensor is currently tracking to be acceptable at full EPU steam flow, with the strain range at full EPU projected to be near the Level 2 acceptance limit.5 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION
1.4 Increased
Core Flow Sweeps The purpose of the increased core flow tests was to determine the effect of mechanical vibration induced by the recirculation pump VPF on the dryer.Test condition 3A was performed at a core flow of 91 million pound-mass per hour (Mlbs/hr)and at approximately 3733 MWth power. Test conditions 3B and 3C consisted of a core sweep test that included fifteen step increases in core flow with a corresponding increase in reactor power. The sweep started at 100 Mlbs/hr and 3535 MWth and finished at 108 Mlbs/hr and 3723 MWth (the target power level for the finish of the sweep was 3733 MWth). Previous plant testing had shown that maximum plant vibration occurred within this core flow range.Test condition 3D was determined based on the core flow that resulted in the highest dryer mechanical vibration due to VPF during the 3B to 3C core flow sweep. The plant was then maneuvered to achieve a power level of approximately 3733 MWth at the target core flow of 105.5 Mlbs/hr. Tables B-3 and Table B-4 (Appendix B) summarize plant conditions during each stage of the core flow tests.Figures 21 and 22 show the response of the dryer [[ ]] during the core flow tests. These figures track the frequency domain response at the VPF over a The [[ ]] response response at the VPF frequency. shown in Figure 22 provides indication of the dryer dynamic[[1]Table 2 includes a summary of the maximum VPF peaks [[F1 Figures 23a, 23b, and 23c show the [6 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION Table 3 includes a comparison of the [[1]Table 2 RMS Response at VPF Peaks [[]1 7 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION Er I* I t.4- 4 t +/- $t +/- 4+ + 4+ + 4]l Table 3 Comparison of Level 1 Acceptance Values at Low and High VPF Vibration 1.5 Sensor Performance All instruments were functional prior to plant startup. was confirmed non-functional after test condition lB.1.6 1985 Benchmark Comparison The SSES Unit 1 original dryer and one of the vessel support lugs were damaged during the first cycle of operation. During a subsequent cycle, the dryer was instrumented to understand the pressure loading acting on the dryer and to confirm the structural adequacy of the repairs. Figure 24 provides a comparison of the [[8 GE-N E-OOO0-0085-2413-N P-RO NON-PROPRIETARY INFORMATION
1.7 Dryer
Rocking In addition to measuring the mechanical excitation due to the VPF, [[]] Therefore, it is concluded that the dryer is not rocking.Tabl~4 11 9 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION
1.8 Summary
Based on the current margin to dryer acceptance limits shown in Table 1 and the trending plots included in Figures 1 through 10, there is adequate projected margin to the dryer acceptance limits for continued power ascension to power levels greater than 3733 MWth. Measurements taken during the core flow sweep [[]] A review of the support ring Er ]] indicated that no dryer rocking was present. A comparison of the 2008 and 1985 coverplate pressure measurements indicates [[10 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION
2.0 REFERENCES
.
- 1. Not Used.2. Not Used.3. GE-NE-0000-0080-2994-R4, "Susquehanna Replacement Steam Dryer Instrumentation Acceptance Criteria -Dryer Mounted Instrumentation," April 2008.4. GE-NE-0000-0079-2250-P-RO, "Susquehanna Replacement Steam Dryer Stress Analysis at Extended Power Uprate Conditions," January 2008.5. GE-NE-0000-0080-8732-P-RO, Engineering Report, "Susquehanna Replacement Steam Dryer Limit Curves -Main Steam Line Mounted Instrumentation".
February 2008.6. MDE #199-0985, "Susquehanna -1 Steam Dryer Vibration Steady State and Transient Response," October 1985.11 GE-NE-000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION Figure 1 11]] Power Ascension Trend Plot 12 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION II Figure 2 [[]] Power Ascension Trend Plot 13 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION Figure 3[II 11 Power Ascension Trend Plot 14 GE-NE-OOOO-0085-2413-NP-RO NON-PROPRIETARY INFORMATION Figure 4 It 1] Power Ascension Trend Plot 15 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION [E Figure 5 II 1] Power Ascension Trend Plot 16 GE-NE-OOOO-0085-2413-NP-RO NON-PROPRIETARY INFORMATION [I-Figure 6 [1]] Power Ascension Trend Plot 17 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION 11 1]Figure 7[I 1] Power Ascension Trend Plot 18 G E-N E-0000-0085-2413-N P-RO NON-PROPRIETARY INFORMATION [1 1]Figure 8[[11 Power Ascension Trend Plot 19 GE-NE-OOO0-0085-2413-NP-RO NON-PROPRIETARY INFORMATION ]]Figure 9 II 11 Power Ascension Trend Plot 20 GE-NE-OOOO-0085-2413-NP-RO NON-PROPRIETARY INFORMATION [[1]Figure 10 [[1] Power Ascension Trend Plot 21 GE-NE-OO00-085-2413-NP-RO NON-PROPRIETARY INFORMATION 1]Figure 11 [[1] PSD Curves 22 GE-N E-OO00-OO85-2413-NP-RO NON-PROPRIETARY INFORMATION Figure 12 j[1] PSD Curves 23 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION 1]Figure 13 1[11 PSD Curves 24 GE-NE-OOOO-0085-2413-NP-RO NON-PROPRIETARY INFORMATION [[Figure 14 [1]]PSD Curves 25 GE-NE-0000-0085-2413-NP-R0 NON-PROPRIETARY INFORMATION [[]]Figure 15 11 1] PSD Curves 26 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION 11l I]Figure 16 [[1] PSD Curves 27 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION ]]Figure 17 [1 11 PSD Curves 28 G E-N E-0000-0085-2413-N P-RO NON-PROPRIETARY INFORMATION [[E Figure 18 [[11 PSD Curves 29 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION 11 Figure 19 I[11 PSD Curves 30 GE-N E-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION 1]Figure 20 1[1] PSD Curves 31 GE-NE-OOOO-0085-2413-N P-RO NON-PROPRIETARY INFORMATION 1]Figure 21 [[]]VPF Peak Amplitudes 32 GE-NE-OOOO-0085-2413-NP-RO NON-PROPRIETARY INFORMATION 11l Figure 22 [[]] VPF Peak Amplitudes 33 GE-N E-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION 1]Figure 23a [[1] Acceptance Limit vs. Core Flow 34 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION lIE]]Figure 23b [[]]Acceptance Limit vs. Core Flow 35 GE-N E-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION I'll 1]Figure 23c [[]lAcceptance Limit vs. Core Flow 36 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION 1[]]Figure 24 1985 vs 2008 [[1] Comparison 37 GE-NE-OOOO-0085-2413-N P-RO NON-PROPRIETARY INFORMATION 1]Figure 25 1985 vs 2008 90deg Coverplate [[1] Data 38 G E-N E-0000-0085-2413-N P- RO NON-PROPRIETARY INFORMATION [1 1]Figure 26 1985 vs 2008 270deg Coverplate [[11 Data 39 GE-N E-OOOO-0085-2413-N P-RO NON-PROPRIETARY INFORMATION 1]Figure 27 2008 Support Ring [[1]40 G E-N E-0000-0085-2413-N P- RO NON-PROPRIETARY INFORMATION Appendix A SSES Replacement Dryer Instrumentation Locations 41 GE-N E-OOOO-0085-2413-NP-RO NON-PROPRIETARY INFORMATION Table A-1 Description of II 11 Sensors II i i 42 GE-NE-OOOO-0085-2413-NP-RO NON-PROPRIETARY INFORMATION [I 11 43 GE-N E-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION [[11 Figure A-1 Dryer Top View 44 G E-N E-0000-0085-2413-N P-RO NON-PROPRIETARY INFORMATION 1]Figure A-2 Elevation 900 View* Dimension measured along circumference.
- This strain gage is vertical, all others horizontal 45 GE-NE-0000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION 11 Figure A-3 Elevation 00 View** Dimension measured along circumference.
46 G E-N E-0000-0085-2413-N P-RO NON-PROPRIETARY INFORMATION [II Figure A-4 Elevation 270° View 47 GE-NE-000-0085-2413-NP-RO NON-PROPRIETARY INFORMATION Appendix B Plant Conditions 48 GE-NE-OOOO-0085-2413-NP-RO NON-PROPRIETARY INFORMATION Table B-I Plant Conditions: 1A, 1B, 1C, 1D, 1E, 1F, iG, 1H, 11, 1J TP 1A TP 1B TP IC TP ID TP 1E TP IF TP IG TP 1H TP 11 TP IJ Date 4/17/08 4/17/08 4/18/08 4119/08 4/20/08 4/21/08 4/24/08 4/25/08 4/30/08 5/6/08 Time (Finish) 0:14 19:35 12:20 4:28 3:54 20:50 20:24 8:46 11:28 14:18 Therm Power Instantaneous (MWth) 582.14 1457.70 1954.89 2555.22 2873.43 3043.22 3291.14 3484.53 3612.81 3731.66 Them Power Inst as % of CPPU 14.7% 36.9% 49.5% 64.7% 72.7% 77.0% 83.3% 88.2% 91.4% 94.4%Therm Power 15 min Avg (MWth) 585.31 1458.32 1956.00 2556.58 2874.78 3041.28 3289.11 3479.84 3607.96 3733.45 Elect Power (Mwe) 103.44 418.15 575.50 786.76 962.32 1003.12 1098.55 1180.87 1203.45 1236.96 Total Core Flow (M Ibm/hr) 44.04 45.33 54.19 59.46 71.37 78.32 84.12 94.13 100.39 96.95 Reclrc Loop Flow A (M Ibm/hr) 21.84 22.61 28.07 29.91 35.86 39.01 42.53 47.17 50.49 48.20 Recire Loop Flow B (M Ibm/hr) 21.31 22.25 25.42 29.16 35.16 38.91 41.15 46.59 49.51 48.30 Recirc Loop A Suction Temp (deg F) 521.48 513.89 513.89 512.96 517.92 520.24 522.09 524.56 526.56 526.25 Recirc Loop B Suction Temp (deg F) 523.02 514.35 514.35 513.89 518.54 520.86 522.71 525.48 527.17 526.87 Core Plate DIP (psi) 1.73 2.11 3.64 5.09 7.88 9.65 11.22 13.84 15.91 15.36 Steam Flow Line A (M Ibm/hr) 0.00 1.35 1.87 2.50 2.94 3.09 3.39 3.64 3.80 3.99 Steam Flow Line B (M Ibm/hr) 0.64 1.48 2.00 2.66 3.07 3.28 3.57 3.82 3.96 4.10 Steam Flow Line C (M Ibm/hr) 0.00 1.43 1.98 2.63 3.08 3.29 3.56 3.82 3.97 4.12 Steam Flow Line D (M Ibm/hr) 0.01 1.40 1.91 2.54 2.97 3.15 3.44 3.68 3.83 3.97 Total Steam Flow (M Ibm/hr) 0.56 5.55 7.66 10.22 11.96 12.69 13.84 14.84 15.43 16.06 Feedwater Flow (M lbm/hr) 1.69 5.42 7.43 10.12 11.74 12.51 13.63 14.58 15.16 15.74 Feedwater Temp Line A (deg F) 113.16 318.26 341.62 362.49 378.63 383.12 389.23 393.72 396.31 399.02 Feedwater Temp Line B (deg F) 124.52 315.82 338.74 359.23 375.67 380.16 386.69 391.12 394.39 397.21 Feedwater Temp Line C (deg F) 83.98 308.92 333.29 359.03 378.49 383.40 389.46 393.90 395.81 398.80 Rx Dome Pressure Narrow Range (psig) 936.46 948.06 959.05 976.00 988.67 994.63 1005.01 1013.56 1019.36 1025.01 Rx Dome Pressure Wide Range (psig) 935.81 948.27 959.27 976.13 989.33 995.20 1006.20 1014.26 1020.13 1025.99 Steam Dome Temp (deg F) 538.67 540.11 541.41 543.58 545.20 545.91 547.20 548.20 548.93 549.58 Recirc Pump A Speed (rpm) 505.00 484.00 663.00 769.00 983.00 1097.00 1203.00 1347.00 1463.00 1415.00 Recirc Pump B Speed (rpm) 497.00 488.00 635.00 771.00 988.00 1106.00 1196.00 1352.00 1467.00 1431.00 Recirc Pump A Power (Mwe) 0.19 0.17 0.40 0.62 1.23 1.69 2.21 3.06 3.89 3.57 Recirc Pump B Power (Mwe) 0.16 0.16 0.33 0.61 1.23 1.71 2.16 3.12 3.91 3.69 CRD Cooling Header Flow (gpm) 63.28 63.50 61.09 63.36 63.54 63.56 63.66 63.45 63.37 63.48 CRD System Flow (gpm) 62.57 62.62 62.63 62.60 62.64 62.64 62.59 62.69 62.50 62.66 CRD System Temp (deg F) 93.56 112.01 110.73 115.76 119.86 125.31 128.91 124.27 122.36 132.02 Bottom Head Drain Temp (deg F) 523.98 515.93 515.07 513.51 521.35 520.65 524.75 531.85 533.09 531.47 Reactor Water Level Narrow Range (In H20) 34.91 34.76 34.54 34.43 34.10 33.63 34.83 35.27 35.13 34.65 Reactor Water Level Narrow Range (In H20) 34.69 35.01 35.28 35.26 35.13 35.30 35.21 35.81 33.94 35.76 Reactor Water Level Narrow Range (In H20) 34.35 34.77 34.77 34.51 33.74 32.68 34.73 34.67 35.56 35.04 Reactor Water Level Wide Range (In H20) 26.63 27.85 29.32 31.15 31.89 34.33 32.84 37.40 34.22 36.18 Recirc Pump A VPF (Hz) 42.08 40.33 55.25 64.08 81.92 91.42 , 100.25 112.25 121.92 117.92 Recirc Pump B VPF (Hz) 41.42 40.67 52.92 64.25 82.33 92.17 99.67 112.67 122.25 119.25 Recirc Pump A Motor Freq (Hz) 17.00 16.30 22.32 25.89 33.10 36.94 40.51 45.35 49.26 47.64 Recirc Pump B Motor Freq (Hz) 16.73 16.43 21.38 25.96 33.27 37.24 40.27 45.52 49.39 48.18 Enhanced Steam Flow Calculations: Feed Flow Line A LEFM (M Ibm/hr) 0.00 2.62 3.72 4.98 3.90 4.17 4.59 4.86 5.02 5.23 Feed Flow Line B LEFM (M lbmlhr) 1.77 2.88 3.77 5.17 3.93 4.21 4.56 4.83 5.07 5.22 Feed Flow Line C LEFM (M Ibm/hr) 0.00 0.00 0.00 0.00 3.80 3.99 4.37 4.72 4.92 5.07 CRD Flow (M Ibm/hr) 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 Total Feedwater Flow (M Ibm/hr) 1.80 5.53 7.52 10.18 11.67 12.41 13.55 14.44 15.04 15.55 Steam Flow Line A (M Ibm/hr) 0.00 1.32 1.81 2.46 2,84 2.99 3.29 3.51 3.67 3.83 Steam Flow Line B (M Ibm/hr) 1.76 1.45 1.94 2.63 2.97 3.17 3.47 3.69 3.82 3.94 Steam Flow Line C (M Ibm/hr) 0.01 1.39 1.92 2.59 2.98 3.19 3.46 3.69 3.84 3.96 Steam Flow Line D (M Ibmlhr) 0.02 1.37 1.85 2.50 2.87 3.06 3.34 3.56 3.70 3.82 T.otal Steam Flow (M Ibm/hr) 1.80 5.53 7.52 10.18 11.67 12.41 13.55 14.44 15.04 15.55 49 G E-N E-0000-0085-2413-N P- RO NON-PROPRIETARY INFORMATION Table B-2 Plant Conditions: 2A.3, 2A.1, 2A.2, 2A.4, 2B.3, 2B.1, 2B.2, 2B.4 TP 2A.3 TP 2A.1 TP 2A.2 TP 2A.4 TP 2B.3 TP 2B.1 TP 2B.2 TP 2B.4 Date 4/20/08 4/21/08 4/21/08 4/21/08 4/22/08 4/22/08 4/22/08 4/22/08 Time (Finish) 12:13 12:57 14:07 15:16 14:18 15:22 16:20 17:51 Therm Power Instantaneous (MW th) 2899.01 2903.00 2908.11 2906.28 3073.06 3074.27 3075.42 3069.68 Them Power Inst as % of CPPU 73.4% 73.5% 73.6% 73.5% 77.8% 77.8% 77.8% 77.7%Therm Power 15 min Avg (MWth) 2894.82 2887.12 2887.72 2887.58 3049.23 3058.19 3050.24 3054.45 Elect Power (Mwe) 969.61 966.69 967.42 946.30 998.75 1016.96 994.38 990.00 Total Core Flow (M Ibm/hr) 68.24 71.75 71.45 71.60 76.72 77.18 77.02 76.87 Recirc Loop Flow A (M Ibmlhr) 32.32 35.60 35.21 35.25 38.28 38.33 38.38 38.33 Recirc Loop Flow B (M Ibm/hr) 35.55 35.84 35.89 35.99 38.08 38.42 38.28 38.13 Recirc Loop A Suction Temp (deg F) 520.86 521.01 521.32 521.01 523.02 523.17 523.48 523.17 Recirc Loop B Suction Temp (deg F) 521.79 521.94 522.09 521.94 523.94 524.10 524.10 523.79 Core Plate D/P (psi) 8.03 7.99 7.96 8.01 9.28 9.28 9.25 9.23 Steam Flow Line A (M Ibm/hr) 0.00 4.16 4.03 3.98 0.00 4.46 4.35 4.25 Steam Flow Line B (M Ibm/hr) 4.14 0.01 4.17 4.11 4.42 0.01 4.45 4.35 Steam Flow Line C (M Ibm/hr) 4.15 4.22 0.00 4.20 4.46 4.52 0.00 4.47 Steam Flow Line D (M Ibm/hr) 3.96 4.04 4.14 0.01 4.26 4.32 4.44 0.01 Total Steam Flow (M Ibm/hr) 12.12 12.31 12.24 12.19 13.03 13.20 13.12 12.97 Feedwater Flow (M Ibm/hr) 11.83 11.90 11.85 11.88 12.69 12.64 12.65 12.61 Feedwater Temp Line A (deg F) 378.80 378.86 379.45 379.45 383.70 383.74 383.93 383.73 Feedwater Temp Line B (deg F) 376.12 375.92 376.52 376.69 380.84 380.98 380.98 380.89 Feedwater Temp Line C (deg F) 379.04 379.20 379.41 379.29 383.56 384.20 383.74 383.19 Rx Dome Pressure Narrow Range (psig) 1017.83 .1020.89 1021.65 1019.36 1028.98 1030.81 1031.88 1029.13 Rx Dome Pressure Wide Range (psig) 1018.66 1021.59 1022.33 1020.13 1029.66 1031.86 1032.59 1029.66 Steam Dome Temp (deg F) 547.59 548.58 547.42 547.69 549.71 549.67 550.29 550.05 Recirc Pump A Speed (rpm) 984.00 984.00 984.00 983.00 1074.00 1074.00 1074.00 1073.00 Recir~c Pump B Speed (rpm) 1003.00 1002.00 1002.00 1002.00 1086.00 1085.00 1085.00 1085.00 Recirc Pump A Power (Mwe) 1.22 1.23 1.22 1.22 1.57 1.58 1.58 1.58 Recirc Pump B Power(Mwe) 1.28 1.28 1.28 1.28 1.62 1.61 1.61 1.62 CRD Cooling Header Flow (gpm) 63.34 63.44 63.27 63.35 62.88 63.00 62.84 63.41 CRD System Flow (gpm) 62.51 62.60 62.45 62.45 61.99 62.10 62.02 62.55 CRD System Temp (deg F) 120.54 124.59 124.78 125.14 127.38 127.60 127.98 128.61 Bottom Head Drain Temp (deg F) 516.54 516.95 520.81 523.60 529.22 518.98 522.78 525.05 Reactor Water Level Narrow Range (In H20) 35.49 34.58 35.60 35.05 36.55 34.91 34.91 35.56 Reactor Water Level Narrow Range (In H20) 34.55 34.02 37.83 37.44 34.58 35.06 35.99 37.22 Reactor Water Level Narrow Range (In H20) 35.81 34.93 34.71 34.62 37.81 34.73 34.84 34.46 Reactor Water Level Wide Range (In H20) 25.39 36.95 41.47 36.18 28.70 39.52 41.72 39.59 Recirc Pump A VPF (Hz) 82.00 82.00 82.00 81.92 89.50 89.50 89.50 89.42 Recirc Pump B VPF (Hz) 83.58 83.50 83.50 83.50 90.50 90.42 90.42 90.42 Recirc Pure p A Motor Freq (Hz) 33.13 33.13 33.13 33.10 36.16 36.16 36.16 36.13 Recirc Pump B Motor Freq (Hz) 33.77 33.74 33.74 33.74 36.57 36.53 36.53 36.53 Enhanced Steam Flow Calculations: Feed Flow Line A LEFM (M Ibm/hr) 3.93 3.99 3.96 3.94 4.21 4.26 4.26 4.23 Feed Flow Line B LEFM (M Ibm/hr) 3.99 4.03 4.04 4.03 4.27 4.26 4.25 4.26 Feed Flow Line C LEFM (M Ibm/hr) 3.82 3.77 3.79 3.80 4.06 4.04 4.06 4.03 CRD Flow (M Ibm/hr) 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 Total Feedwater Flow (M Ibm/hr) 11.78 11.82 11.82 11.81 12.57 12.58 12.59 12.55 Steam Flow Line A (M Ibm/hr) 0.00 3.94 3.93 3.88 0.00 4.22 4.14 4.07 Steam Flow Line B (M Ibm/hr) 3.98 0.01 3.97 3.92 4.22 0.01 4.23 4.17 Steam Flow Line C (M Ibm/hr) 3.99 4.03 0.00 4.00 4.27 4.27 0.00 4.29 Steam Flow Line D (M Ibm/hr) 3.80 3.84 3.93 0.01 4.08 4.08 4.22 0.01 Total Steam Flow (M Ibm/hr) 11.78 11.82 11.82 11.81 12.57 12.58 12.59 12.55 50 GE-NE-OOOO-0085-2413-NP-RO NON-PROPRIETARY INFORMATION Table B-3 Plant Conditions: 3A & 3B (91 -105 Mlb/hr)TP 3A TP 3B TP 3B TP 3B TP 3B TP 3B TP 3B TP 3B D ate 5/11/08 5/12/08 5/12/08 5/12/08 5/12/08 5/12/08 5/12/08 5/12/08 9:11 3:10 3:41 3:55 4:15 4:41 5:11 5:31 Therm Power Instantaneous (MWth) 3728.64 3533.64 3552.82 3558.91 3572.10 3607.63 3622.26 3634.72 Therm Power 15 mrin Avg (MWth) 3729.46 3534.10 3535.22 3553.94 3572.41 3591.86 3617.95 3625.81 Elect Power (Mwe) 1250.07 1199.81 1195.44 1210.73 1214.38 1226.03 1222.39 1215.83 Total Core Flow (M Ibm/hr) 91.38 100.24 101.31 102.30 102.76 104.28 104.67 104.97 Recirc Loop Flow A (M Ibmlhr) 45.56 50.25 50.74 51.22 51.22 52.59 52.49 52.54 Recirc Loop Flow B (M Ibm/hr) 45.43 49.61 50.14 50.68 51.12 51.26 51,75 52.04 Recirc Loop A Suction Temp (deg F) 525.18 526.25 526.56 526.71 527.02 527.33 527.48 527.63 Recirc Loop B Suction Temp (deg F) 525.79 527.02 527.33 527.48 527.63 528.25 528.09 528.25 Core Plate DIP (psi) 13.75 15.83 16.28 16.43 16.75 17.07 17.27 17.43 Steam Flow Line A (M Ibm/hr) 3.90 3.66 3.73 3.71 3.76 3.86 3.78 3.87 Steam Flow Line B (M Ibmlhr) 4.11 3.86 3.89 3.90 3.92 3.97 3.97 3.99 Steam Flow Line C (M Ibm/hr) 4.11 3.88 3.90 3.93 3.93 3.96 3.97 3.99 Steam Flow Line D (M lbm/hr) 3.94 3.72 3.76 3.79 3.80 3.82 3.83 3.86 Total Steam Flow (M Ibm/hr) 15.95 15.03 15.17 15.22 15.29 15.51 15.44 15.61 Feedwater Flow (M Ibm/hr) 15.74 14.79 14.93 15.01 15.07 15.17 15.29 15.27 Feedwater Temp Line A (deg F) 399.02 395.06 395.22 395.41 395.68 396.06 396.57 396.91 Feedwater Temp Line B (deg F) 397.30 393.35 393.67 393.82 394.02 394.33 394.84 395.18 Feedwater Temp Line C (deg F) 398.63 394.93 394.93 395.23 395.78 396.49 396.84 397.04 Rx Dome Pressure Narrow Range (psig) 1025.01 1015.70 1016.61 1017.68 1018.14 1019.51 1019.97 1020.74 Rx Dome Pressure Wide Range (psig) 1025.99 1016.46 1017.93 1018.66 1018.66 1020.86 1021.59 1021.59 Steam Dome Temp (deg F) 549.61 548.53 548.61 548.67 548.76 548.87 548.98 549.05 Recirc Pump A Speed (rpm) 1345.00 1453.00 1470.00 1484.00 1494.00 1520.00 1519.00 1526.00 Recirc Pump B Speed (rpm) 1354.00 1459.00 1477.00 1492.00 1506.00 1516.00 1527.00 1535.00 Recirc Pump A Power (Mwe) 3.08 3.87 3.97 4.05 4.18 4.31 4.42 4.48 Reclrc Pump B Power (Mwe) 3.13 3.92 4.00 4.09 4.22 4.36 4.49 4.57 CRD Cooling Header Flow (gpm) 63.54 63.41 63.47 63.49 63.53 63.56 63.59 63.54 CRD System Flow (gpm) 62.64 62.67 62.60 62.56 62.50 62.57 62.67 62.68 CRD System Temp (deg F) 127.54 124.28 124.45 124.57 124.75 124.88 125.01 124.98 Bottom Head Drain Temp (deg F) 523.20 523.00 522.76 516.59 525.51 526.73 531.38 524.34 Reactor Water Level Narrow Range (In H20) 36.15 34.83 34.76 35.20 35.13 36.11 34.76 35.38 Reactor Water Level Narrow Range (In H20) 36.80 34.64 35.06 35.46 34.53 35.21 34.95 36.21 Reactor Water Level Narrow Range (In H20) 35.63 34.49 34.99 35.28 35.68 36.47 34.68 35.35 Reactor Water Level Wide Range (In H20) 37.13 36.86 36.21 35.58 36,32 35.19 35.34 34.64 Recirc Pump A VPF (Hz) 112.08 121.08 122.50 123.67 124.50 126.67 126.58 127.17 Recirc Pump B VPF (Hz) 112.83 121.58 123.08 124.33 125.50 126.33 127.25 127.92 Reclrc Pump A Motor Freq (Hz) 45.29 48.92 49.49 49.97 50.30 51.18 51.14 51.38 Recirc Pump B Motor Freq (Hz) 45.59 49.12 49.73 50.24 50.71 51.04 51.41 51.68 Enhanced Steam Flow Calculations: Feed Flow Line A LEFM (M Ibm/hr) 5.23 4.86 4.88 4.96 4.98 5.01 5.08 5.09 Feed Flow Line B LEFM (M Ibmlhr) 5.21 4.86 4.98 4.99 5.02 5.09 5.08 5.09 Feed Flow Line C LEFM (M Ibm/hr) 5.10 4.91 4.87 4.84 4.83 4.91 4.90 4.92 CRD Flow (M Ibm/hr) 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 Total Feedwater Flow (M Ibm/hr) 15.57 14.66 14.76 14.82 14.86 15.04 15.09 15.13 Steam Flow Line A (M Ibm/hr) 3.78 3.55 3.60 3.59 3.63 3.72 3.67 3.73 Steam Flow Line B (M Ibm/hr) 3.98 3.74 3.76 3.78 3.78 3.82 3.85 3.85 Steam Flow Line C (M Ibm/hr) 3.98 3.76 3.77 3.80 3.79 3.81 3.86 3.84 Steam Flow Line D (M Ibm/hr) 3.82 3.61 3.64 3.67 3.67 3.68 3.71 3.72 Total Steam Flow (M Ibm/hr) 15.57 14.66 14.76 14.82 14.86 15.04 15.09 15.13 51 GE-NE-OOOO-0085-2413-N P-RO NON-PROPRIETARY INFORMATION Table B-4 Plant Conditions: 3C & 3D (105 -108 Mlb/hr)TP 3C TP 3C TP 3C TP 3C TP 3C TP 3C TP 3C TP 3C TP 3D Date 5/15/08 5/16/08 5/16/08 5/16/08 5/16/08 5/16/08 5/16/08 5/16/08 5/16/08 23:26 0:01 0:25 0:46 1:07 1:26 1:44 2:00 13:38 Therm Power Instantaneous (MWth) 3666.12 3675.44 3685.96 3695.73 3706.96 3715.07 3720.96 3723.27 3721.02 Therm Power 15 min Avg (MWth) 3682.38 3670.79 3680.97 3689.08 3701.30 3711.81 3717.57 3721.89 3722.13 Elect Power (Mwe) 1233.32 1239.14 1238.42 1219.48 1250.80 1231.13 1226.76 1229.67 1242.06 Total Core Flow (M lbm/hr) 105.35 105.66 106.50 106.88 107.19 107.34 107.87 107.80 106.04 Recirc Loop Flow A (M Ibm/hr) 52.98 52.23 53.57 53.47 53.86 53.76 53.81 53.91 52.89 Recirc Loop Flow B (M lbm/hr) 51.99 52.04 52.53 53.06 52.97 53.16 53.65 53.45 52.82 Recirc Loop A Suction Temp (deg F) 527.63 527.79 527.94 528.09 528.25 528.25 528.40 528.25 527.94 Recirc Loop B Suction Temp (deg F) 528.40 528.40 528.71 528.86 528.86 529.01 529.01 529.01 528.71 Core Plate DIP (psi) 17.41 17.50 17.73 17.84 17.99 18.13 18.30 18.19 17.73 Steam Flow Line A (M Ibm/hr) 3.91 3.86 3.89 3.89 3.92 3.91 3.97 3.93 3.92 Steam Flow Line B (M Ibm/hr) 4.03 4.03 4.05 4.05 4.07 4.08 4.10 4.09 4.09 Steam Flow Line C (M lbmlhr) 4.06 4.06 4.08 4.09 4.09 4.12 4.10 4.12 4.15 Steam Flow Line D (M lbm/hr) 3.90 3.91 3.93 3.94 3.96 3.96 3.94 3.97 3.97 Total Steam Flow (M Ibm/hr) 15.80 15.76 15.84 15.85 15.93 15.93 16.01 15.99 16.02 Feedwater Flow (M lbm/hr) 15.47 15.51 15.57 15.58 15.67 15.69 15.72 15.73 15.67 Feedwater Temp Line A (deg F) 398.29 397.81 398.12 398.40 398.65 398.78 398.90 399.01 398.82 Feedwater Temp Line B (deg F) 396.09 396.21 396.32 396.53 396.75 396.91 396.97 397.22 397.09 Feedwater Temp Line C (deg F) 397.60 397.96 396.20 398.27 398.34 398.41 398.53 398.56 398.54 Rx Dome Pressure Narrow Range (psig) 1021.80 1022.11 1022.87 1023.33 1023.79 1024.55 1024.86 1024.71 1024.55 Rx Dome Pressure Wide Range (psig) 1023.06 1023.06 1024.53 1025.26 1025.26 1025.99 1025.99 1025.99 1025.26 Steam Dome Temp (deg F) 549.31 549.28 549.28 549.32 549.40 549.46 549.51 549.56 549.58 Recirc Pump A Speed (rpm) 1533.00 1541.00 1547.00 1550.00 1563.00 1568.00 1568.00 1567.00 1541.00 Recirc Pump B Speed (rpm) 1537.00 1544.00 1554.00 1564.00 1568.00 1574.00 1581.00 1581.00 1555.00 Recirc Pump A Power (Mwe) 4.55 4.63 4.67 4.70 4.82 4.86 4.86 4.86 4.63 Recirc Pump B Power (Mwe) 4.58 4.64 4.73 4.82 4.87 4.91 4.99 4.98 4.75 CRD Cooling Header Flow (gpm) 63.63 63.57 63.55 63.55 63.55 63.51 63.53 63.64 63.56 CRD System Flow (gpm) 62.75 62.62 62.55 62.51 62.46 52.48 62.55 62.61 62.65 CRD System Temp (deg F) 129.85 129.58 129.31 129.05 129.31 129.31 129.31 129.31 129.03 Bottom Head Drain Temp (deg F) 536.91 537.31 537.39 530.89 535.52 522.97 535.04 527.73 529.75 Reactor Water Level Narrow Range (In H20) 35.53 34.87 34.76 35.05 34.76 34.61 34.47 35.20 35.42 Reactor Water Level Narrow Range (In H20) 35.15 36.10 34.86 35.26 34:80 34.97 35.13 35.45 34.42 Reactor Water Level Narrow Range (In H20) 35.65 34.85 34.26 35.34 34.99 35.12 35.08 36.14 35,87 Reactor Water Level Wide Range (In H20) 37.50 37.61 35.30 35.57 37.22 36.62 37.06 35.60 36.44 Recirc Pump A VPF (Hz) 127.75 128.42 128.92 129.17 130.17 130.67 130.67 130.58 128.42 Recirc Pump B VPF (Hz) 128.08 128.67 129.50 130.33 130.67 131.17 131.75 131.75 129.58 Recirc Pump A Motor Freq (Hz) 51.62 51.89 52.09 52.19 52.59 52.79 52.79 52.76 51.89 Recirc Pump B Motor Freq (Hz) 51.75 51.99 52.32 52.66 52.79 53.00 53.23 53.23 52.36 Enhanced Steam Flow Calculations: Feed Flow Line A LEFM (M lbm/hr) 5.03 5.09 5.15 5.17 5.18 5.22 5.18 5.21 5.19 Feed Flow Line B LEFM (M lbm/hr) 5.14 5.14 5.12 5.18 5.20 5.21 5.24 5.23 5.22 Feed Flow Line C LEFM (M lbm/hr) 5.09 5.08 5.07 5.05 5.05 5.06 5.09 5.09 5.07 CRD Flow (M lbm/hr) 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 Total Feedwater Flow (M Ibmlhr) 15.30 15.33 15.37 15.43 15.47 15.53 15.55 15.56 15.51 Steam Flow Line A (M lbm/hr) 3.76 3.73 3.75 3.75 3.78 3.78 3.83 3.79 3.77 Steam Flow Line B (M Ibmlhr) 3.88 3.90 3.90 3.92 3.93 3.95 3.95 3.95 3.94 Steam Flow Line C (M Ibm/hr) 3.90 3.93 3.93 3.95 3.94 3.98 3.96 3.98 3.99 Steam Flow Line D (M Ibm/hr) 3.75 3.78 3.78 3.81 3.82 3.83 3.80 3.83 3.82 Total Steam Flow (M Ibmlhr) 15.30 15.33 15.37 15.43 15.47 15.53 15.55 15.56 15.51 52}}