PLA-6749, Replacement Steam Dryer Report, Start-Up, 110.5% Power Test Plateau, July 17, 2011, PLA-6749

From kanterella
Jump to navigation Jump to search
Replacement Steam Dryer Report, Start-Up, 110.5% Power Test Plateau, July 17, 2011, PLA-6749
ML11286A194
Person / Time
Site: Susquehanna Talen Energy icon.png
Issue date: 09/21/2011
From: Kearney F
Susquehanna
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
PLA-6749
Download: ML11286A194 (22)
v • d • e


Text

Faber A. Kearney PPL Susquehanna, LLC Site Vice President 769 Salem Boulevard " , e Berwick, PA 18603 Do Tel. 570.542.2904 Fax 570.542.1504 fakearney@pplweb.com SEP 2 12011 "TM U. S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Stop O-Pl-17 Washington, DC 20555-0001 SUSQUEHANNA STEAM ELECTRIC STATION REPLACEMENT STEAM DRYER REPORT, UNIT 2 START-UP, 110.5% POWER TEST PLATEAU, JULY 17, 2011 PLA-6749 Docket No. 50-388 The purpose of this submittal is to provide the attached evaluation of PPL Susquehanna, LLC's (PPL) Susquehanna SES Unit 2 steam dryer performance based on the data collected at the 110.5% power test plateau as required by the following Operating License Condition.

License Condition 2.C.(20)(a)3 requires:

"PPL shall hold the facility at each 3.5% ascension step to collect data from License Condition 2.C.(20)(a) and conduct plant inspections and walk-downs, and evaluate steam dryer performance based on the data; shall provide the evaluation to the NRC staff by facsimile or electronic transmission to the NRC project manager upon completion of the evaluation; and shall not increase power above each hold point until 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> after the NRC project manager confirms receipt of the transmission."

Summary:

This report provides a summary of the SSES Unit 2 replacement steam dryer monitoring instrumentation (Main Steam Line Strain Gage) measurements at the 110.5% licensed thermal power (CLTP) test plateau. This data was collected at a power level of 3850 MWth and a core flow of 105.2 M lbm/hr. Based on the current margin to dryer acceptance limits shown in the report, there is adequate projected margin to the dryer acceptance limits for continued power ascension to 3952 MWth. contains proprietary information of PPL and is furnished in confidence solely for the purpose(s) stated in the report. No other use, direct or indirect, of the document or the information it contains is authorized. Furnishing this enclosure does not convey any

Document Control Desk PLA-6749 license, expressed or implied, to use any patented invention or, except as specified above, any proprietary information of PPL disclosed herein or any right to publish or make copies of the enclosure without prior written permission of PPL.

The enclosed information contains proprietary information as defined by IOCFR2.390.

PPL, as the owner of the proprietary information, has executed the enclosed affidavit, which identifies that the enclosed proprietary information has been handled and classified as proprietary, is customarily held in confidence, and has been withheld from public disclosure. PPL hereby requests that the enclosed proprietary information be withheld from public disclosure in accordance with the provisions of 10CFR2.390.

The header on each page in this enclosure carries the notation "PPL Proprietary Information." PPL proprietary information is identified inside triple brackets.

(( {This sentence is an example.(2)} } }. In each case, the superscript notation (2) refers to Paragraph (2) of the PPL affidavit, which provides the basis for the proprietary determination. Specific information that is not so marked is not PPL proprietary.

There are no new commitments in this letter.

If you have questions, please contact C. T. Coddington at (610) 774-4019.

Sincerely, F. A. Kearney - SSES Replacement Steam Dryer Report, Unit 2 Start-Up, 110.5%

Power Test Plateau, July 17, 2011 - PPL Proprietary Information. - SSES Replacement Steam Dryer Report, Unit 2 Start-Up, 110.5%

Power Test Plateau, July 17, 2011 - Non-Proprietary Information. - Affidavit Copy: NRC Region I Mr. P. W. Finney, NRC Sr. Resident Inspector Mr. R. R. Janati, DEP/BRP Mr. B. K. Vaidya, NRC Project Manager

ENCLOSURE 2 TO PLA-6749 SSES Replacement Steam Dryer Report Unit 2 Start-Up 110.5% Power Test Plateau July 17, 2011 Non-Proprietary Information

p SSES Replacement Steam Dryer Report Unit 2 Start-Up 110.5 % Power Test Plateau July 17, 2011 Prepared B.4Q 0. (Z)a;1ý7 Reviewed By:

Approved by: A n.. -. k rcs- pra.e..cb-i Page 1 of 16

This report provides a summary of the SSES Unit 2 replacement steam dryer monitoring instrumentation (Main Steam Line Strain Gage) measurements at the 110.5% CLTP test plateau.

This data was collected at a power level of 3850 MWth and a core flow of 105.2 M lbm/hr. The main steam line (MSL) strain gage locations are documented in Reference 1. The plant data log sheets for this power plateau are contained in Appendix A. The data log sheets provide a record of plant conditions at this plateau.

Figures 1 through 8 provide power spectral density (PSD) plots of MSL strain gage readings.

The Level 1 and Level 2 limit curves for each strain gage location are also plotted on each figure.

The strain values represent average strain values observed over a 180 second test time period. A data sampling rate of 2500 HZ was used in the data processing. The test data was bandpass filtered between 3 and 250 HZ to be consistent with the load definition used in the replacement dryer structural analysis in Reference 2. There is substantial noise from the 60 HZ alternating current and the recirculation pump power supply, thus filtering of this electrical noise was performed. Also the reactor recirculation pump vane passing frequencies were filtered from the data sets. Testing on the instrumented Unit 1 steam dryer (({

(2) Reference 2 documented that the (({ 

                                                   .(2))}}  The filters applied to the 3850 MWth data are contained in Table 1 below:

Table 1: PSD Notch Filter Specifications f{f{ Frequency Width Origin I + I + 

                                                                                              .(2) }}

Noise peaks at approximately 137 HZ and 142.5 HZ were noted during the primary system hydrostatic test prior to plant start-up. This is a condition where systems are pressurized to operating levels but no steam flow exists. As Unit 2 ascended in power, this noise peak did not increase in amplitude. The source of this noise could not be determined but it has been conclusively shown that it is not related to power and/or steam flow and therefore a filter has been applied to eliminate it. PSDs were calculated on 2 second blocks of data from the test time period (180 seconds). In order to increase the number of spectral averages, the data blocks were overlapped by 50%. The Page 2 of 16

D PSDs were calculated using a Hanning window and a 0.5 HZ bin size. The resulting PSDs were then linearly 'averaged and are presented as Figures 1 through 8. This method of data processing was used to provide the results in a format consistent with the processing used to develop the monitoring curves. There are also two monitoring curves included with the PSD plots. The Level 1 monitoring curve represents the response of the SSES dryer finite element (FE) model under the design acoustic load conditions factored by the minimum component analysis margin to the endurance limit. The Level 2 monitoring curve is based on 80% of the Level 1 curve. A more complete description is included in Reference 3 and Reference 4. The Limit Curves were generated in accordance with Reference 3 using a baseline data set from Unit 2 collected at 3733 MWth during the current power ascension. These monitoring curves provide guidance for evaluating the measured dryer response with respect to the structural analysis results and represent the acceptance criteria for the power ascension. Table 2 below shows the maximum strain gage reading as a percent of acceptance limits generated in accordance with Reference 3 using a baseline data set from Unit 2 collected at 3733 MWth. All values of strain are below the Level 1 and Level 2 acceptance limits. Table 2: Maximum MSL Strain Gage Readings @ 3850 MWth Expressed as a Ratio of the Acceptance Limits Strain Gage Location [  % of Level 1  % of Level 2 1 Frequency 4 1 +/- 4 4 4 4 + For trending purposes, filtered MSL strain gage PSDs for powers up to 110.5% of CLTP (3850 MWth) have been plotted in a waterfall format and are presented in Figures 9 through 16. Figure 17 is a trend plot of the RMS value of the sample time histories plotted against total steam flow. Figures 9 through 17 shows that MSL strains are (({ MSL strain gages mounted on the A and D steam lines have the highest magnitude readings. This is attributed to the large 15 HZ peak being generated by the SRV dead-legs on these two steam lines. The magnitude and frequency of the MSL strain gage PSDs is similar to the PSDs measured on Unit 2 in 2009 in both frequency content and magnitude. As previously stated, the Level 1 and Level 2 limit curves, Figures 1 through 8, are based on Unit 2 strain gage PSD's recorded at 3733 MWth during the 2011 start-up in July. Page 3 of 16

Summary Based on the current margin to dryer acceptance limits shown in Table 2 and in Figures 1 through 8, there is adequate projected margin to the dryer acceptance limits for continued power ascension to 3952 MWth.

References:

1. PPL Letter To USNRC, PLA-6176 (Figure 31-1), "Susquehanna Steam Electric Station Proposed License Amendment No. 285 For Unit 1 Operating License No. NPF-14 And Proposed License Amendment No. 253 For Unit 2 Operating License No. NPF-22 Extended Power Update Application Regarding Steam Dryer And Flow Effects Request For Additional Information Responses", dated 4/27/2007
2. GE-Hitachi Nuclear Energy Engineering Report 0000-0095-2113-P-RO, "Susquehanna Replacement Steam Dryer Updated Stress Analysis At Extended Power Uprate Conditions", Class III, February 2009 (Provided via PPL Letter To USNRC, PLA-6484, dated 2/27/09)
3. GE-Hitachi Nuclear Energy Engineering Report 0000-0096-5766-P-Ri, "Revised Susquehanna Replacement Steam Dryer Limit Curves - Main Steam Line Mounted Instrumentation", Class III, February 2009 (Provided via PPL Letter To USNRC, PLA-6484, dated 2/27/09)
4. GE-Hitachi Nuclear Energy Engineering Report 0000-0101-0766-P-RO, "Main Steam Line Limit Curve Adjustment During Power Ascension", Class III, April 2009 (Provided via PPL Letter To USNRC, PLA-65 10, dated 5/12/09)

Page 4 of 16

A (2)} }} Figure 1: MSL A Upper Strain Gage PSD Plot (2)}}} Figure 2: MSL A Lower Strain Gage PSD Plot Page 5 of 16

(2) }} Figure 3: MSL B Upper Strain Gage Plot PSD Plot (2) }} Figure 4: MSL B Lower Strain Gage PSD Plot Page 6 of 16

(2)} }} Figure 5: MSL C Upper Strain Gage PSD Plot (2)} } } Figure 6: MSL C Lower Strain Gage PSD Plot Page 7 of 16

(2)} }} Figure 7: MSL D Upper Strain Gage PSD Plot (2)}~}} Figure 8: MSL D Lower Strain Gage PSD Plot Page 8 of 16

(2)} }} Figure 9: MSL A Upper Strain Gage PSD Waterfall Plot (2)} }} Figure 10: MSL A Lower Strain Gage PSD Waterfall Plot Page 9 of 16

p (2)} } Figure 11: MSL B Upper Strain Gage PSD Waterfall Plot (2)} }} Figure 12: MSL B Lower Strain Gage PSD Waterfall Plot Page 10 of 16

(2)} } } Figure 13: MSL C Upper Strain Gage PSD Waterfall Plot (2)} }} Figure 14: MSL C Lower Strain Gage PSD Waterfall Plot Page 11 of 16

(2)} } } Figure 15: MSL D Upper Strain Gage PSD Waterfall Plot (2)}}} Figure 16: MSL D Lower Strain Gage PSD Waterfall Plot Page 12 of 16

r, (2)}} Figure 17: MSL Strain Gage Time History RMS Trends Page 13 of 16

Appendix A Plant Data Log Sheets Page 14 of 16

Steam Dryer Data Log Sheets Start jDate/Time 7/1712011 12:40 (Start) Computer ID Value Units Thermal Power (Instantaneous) u02.nba0l 3850.49 MWth Thermal Power (15 min Ave.) u02.nbal0l 3850.05 MWth Electrical Power u02.tral78 1269.41 Mwe Total Core Flow u02.traO26 105.17 M Ibm/hr Recirc Loop Flow A u02.traO28 50.37 M Ibm/hr Recirc Loop Flow B u02.traO29 51.49 M Ibm/hr Recirc Loop A Suction Temperature u02.nrt0l 525.83 °F Recirc Loop B Suction Temperature u02.nrtO2 526.25 °F Core Plate D/P u02.traO27 16.47 PSI Indicated Steam Flow Line A u02.nffOl 4.05 M Ibm/hr Indicated Steam Flow Line B u02.nffO2 4.25 M Ibm/hr Indicated Steam Flow Line C u02.nffO3 4.15 M Ibm/hr Indicated Steam Flow Line D u02.nffO4 4.09 M Ibm/hr Indicated Total Steam Flow u02.traO97 16.58 M Ibm/hr Indicated Feedwater Flow u02.traO98 16.12 M Ibm/hr Feedwater Temperature Line A 0 u02.tra 02 399.31 F Feedwater Temperature Line B u02.tralO3 400.80 T Feedwater Temperature Line C u02.tral04 399.84 OF Rx Dome Pressure Narrow Range u02.tra2O8 1026.09 PSIG Rx Dome Pressure Wide Range u02.tra2O9 1025.84 PSIG Steam Dome Temperature u02.nfa05 549.43 °F Recirculation Pump A Speed vm.2p401a/2a rrpjtac 1503.00 RPM Recirculation Pump B Speed vm.2p401b/2brrp tac 1495.00 RPM Recirculation Pump A Power u02.nrj5l 4.17 MWe Recirculation Pump B Power u02.nrj52 4.11 MWe CRD Cooling Header Flow u02.nef03 61.84 GPM CRD System Flow u02.nefOl 61.94 GPM CRD System Temperature u02.ndt05 140.82 TF Bottom Head Drain Temp u02.tra2O6 530.04 T Reactor Water Level Narrow Range u02.tral42 34.85 Inches H20 Reactor Water Level Narrow Range u02.nflO2 35.68 Inches H20 Reactor Water Level Narrow Range u02.nflO3 34.47 Inches H20 Reactor Water Level Wide Range u02.tral43 31.51 Inches H20 Recirculation Pump A Vane Passing Freq. n/a 125.25 Hz Recirculation Pump B Vane Passing Freq. n/a 124.58 Hz Recirculation Pump A Motor Frequency n/a 50.61 Hz Recirculation Pump B Motor Frequency n/a 50.34 Hz Enhanced Steam Flow Calculations Feed Flow Line A (LEFM) u02.nff77 5.38 M Ibm/hr Feed Flow Line B (LEFM) u02.nff78 5.36 M Ibm/hr Feed Flow Line C (LEFM) u02.nff79 5.32 M Ibm/hr CRD Flow u02.ndfOl 0.03 M Ibm/hr Total Feedwater Flow n/a 16.10 M Ibm/hr Steam Flow Line A n/a 3.94 M Ibm/hr Steam Flow Line B n/a 4.14 M Ibm/hr Steam Flow Line C n/a 4.04 M Ibm/hr Steam Flow Line D n/a 3.98 M Ibm/hr Total Steam Flow nla 16.10 M Ibm/hr Page 15 of 16

Steam Dryer Data Log Sheets Finish jDate/Time 7/17/2011 12:43 (Finish) Computer ID Value Units Thermal Power (Instantaneous) u02.nba01 3850.32 MWth Thermal Power (15 min Ave.) u02.nba101 3850.00 MWth Electrical Power u02.tra178 1267.43 Mwe Total Core Flow u02.traO26 104.82 M Ibm/hr Recirc Loop Flow A u02.traO28 50.23 M Ibm/hr Recirc Loop Flow B u02.traO29 51.28 M Ibm/hr Recirc Loop A Suction Temperature u02.nrt01 525.86 TF 0 Recirc Loop B Suction Temperature u02.nrt02 526.26 F Core Plate DIP u02.traO27 16.42 PSI Steam Flow Line A u02.nffOl 4.06 M Ibm/hr Steam Flow Line B u02.nffO2 4.27 M Ibm/hr Steam Flow Line C u02.nffO3 4.15 M Ibm/hr Steam Flow Line D u02.nff04 4.07 M Ibm/hr Total Steam Flow u02.traO97 16.59 M Ibm/hr Feedwater Flow u02.traO98 16.12 M Ibm/hr Feedwater Temperature Line A u02.tralO2 399.26 T Feedwater Temperature Line B u02.tralO3 400.83 TF Feedwater Temperature Line C u02.tralO4 399.93 T Rx Dome Pressure Narrow Range u02.tra2O8 1026.16 PSIG Rx Dome Pressure Wide Range u02.tra2O9 1025.83 PSIG Steam Dome Temperature u02.nfa05 549.43 °F Recirculation Pump A Speed vm.2p401a/2a rrp tac 1503.00 RPM Recirculation Pump B Speed vm.2p401b/2b rrp tac 1495.00 RPM Recirculation Pump A Power u02.nrj5l 4.18 MWe Recirculation Pump B Power u02.nrj52 4.11 MWe CRD Cooling Header Flow u02.nefO3 61.83 GPM CRD System Flow u02.nef0l 61.95 GPM CRD System Temperature u02.ndtO5 140.91 TF Bottom Head Drain Temp u02.tra2O6 530.07 TF Reactor Water Level Narrow Range u02.tra142 34.63 Inches H20 Reactor Water Level Narrow Range u02.nflO2 35.56 Inches H20 Reactor Water Level Narrow Range u02.nflO3 34.11 Inches H20 Reactor Water Level Wide Range u02.tra143 31.73 Inches H20 Recirculation Pump A Vane Passing Freq. n/a 125.25 Hz Recirculation Pump B Vane Passing Freq. n/a 124.58 Hz Recirculation Pump A Motor Frequency n/a 50.61 Hz Recirculation Pump B Motor Frequency n/a 50.34 Hz Enhanced Steam Flow Calculations Feed Flow Line A (LEFM) u02.nff77 5.38 M Ibm/hr Feed Flow Line B (LEFM) u02.nff78 5.37 M Ibm/hr Feed Flow Line C (LEFM) u02.nff79 5.32 M Ibm/hr CRD Flow u02.ndf01 0.03 M Ibm/hr Total Feedwater Flow n/a 16.10 M Ibm/hr Steam Flow Line A n/a 3.95 M Ibm/hr Steam Flow Line B n/a 4.16 M Ibm/hr Steam Flow Line C n/a 4.04 M Ibm/hr Steam Flow Line D n/a 3.96 M Ibm/hr Total Steam Flow n/a 16.10 M Ibm/hr Page 16 of 16

ENCLOSURE 3 TO PLA-6749 Affidavit

4 CONFIDENTIAL INFORMATION SUBMITTED UNDER 10 C.F.R. .2.390 AFFIDAVIT OF RICHARD D. PAGODIN I, Richard D. Pagodin General Manager-Nuclear Engineering PPL Susquehanna, LLC, do hereby affirm and state:

1. I am authorized to execute this affidavit on behalf of PPL Susque-hanna, LLC (hereinafter referred to as "PPL").
2. PPL requests that the information attached and identified by text inside triple brackets (({This sentence is an example.}}} be withheld from public disclosure under the provisions of 10 C.F.R. 2.390(a)(4).
3. The PPL Documents contain confidential commercial information, the disclosure of which would adversely affect PPL.
4. This information has been held in confidence by PPL. To the extent that PPL has shared this information with others, it has done so on a confidential basis.
5. PPL customarily keeps such information in confidence and there is a rational basis for holding such information in confidence. The information is not available from public sources and could not be gathered readily from other publicly available information.
6. Public disclosure of this information would cause substantial harm to the competitive position of PPL, because such information has significant commercial value to PPL.
7. The information identified in paragraph (2) above is classified as proprietary because it details the results of test data derived from test instrumentation installed specifically to collect this data. This instrumentation was installed at a significant cost to PPL. The data and the conditions under which it was collected constitute a major PPL asset.
8. Public disclosure of the information sought to be withheld is likely to cause substantial harm to PPL by foreclosing or reducing the availability of profit-making opportunities. The information is of value to other BWR Licensee's and would support evaluations and analyses associated with extended power uprate license amendment submittals. Making this information available to other BWR Licensee's would represent a windfall and deprive PPL the opportunity to recover a portion of its large investment in the test instrumentation from which this data is derived.

PPL SUSQUEHANNA, LLC Richard D. Pagodin/ Commonwe f Pennsylvania Count Subscribed and sworn before me, a Notary Public in and for the Commonwealth of Pennsylvania This/*7*ay of ,2011 cOM OF PENNSYLVANIA Parela M.vincent. Notary PuObc Su~~dTp.,Columtq county 

                    ~pleSMay 31, 2014 My~nW11SIO~

M~ember. .en~lal EO~~lo re}}

Retrieved from "https://kanterella.com/w/index.php?title=PLA-6749,_Replacement_Steam_Dryer_Report,_Start-Up,_110.5%25_Power_Test_Plateau,_July_17,_2011,_PLA-6749&oldid=2547220"