NLS2012033, Enclosure 4 - Calculation Nedc 11-109, Rev. 0, Instrument Drift Analysis for NBI-PS-51A/B/C/D (Barksdale B2T-M12SS)

From kanterella
Jump to navigation Jump to search
Enclosure 4 - Calculation Nedc 11-109, Rev. 0, Instrument Drift Analysis for NBI-PS-51A/B/C/D (Barksdale B2T-M12SS)
ML12129A319
Person / Time
Site: Cooper Entergy icon.png
Issue date: 10/03/2011
From: Schmich R
Nebraska Public Power District (NPPD)
To:
Office of New Reactors
References
NLS2012033 NEDC 11-109, Rev. 0
Download: ML12129A319 (47)
v • d • e


Text

NLS2012033 Page 1 of 47 Enclosure 4 NEDC 11-109, Rev. 0 "Instrument Drift Analysis for NBI-PS-5 1A/B/C/D"

ATrACHMENT 1 DESIGN CALCULATION COVERSHEET Page 1 of 4 RISK SIGNIFICANT

Title:

Instrument Drift Analysis for NBI-PS- Calculation Number: NEDC 11-109 51A/B/C/D (Barksdale B2T-M12SS) CED/EE Number: EE 10-045 System/Structure: HPCI Setpoint Change/Part Eval Number:

Component: NBI-PS-51A/B/C/D Discipline: IAC Classification: [X] Essential; [ ] Non-Essential SQAP Requirements Met? YES; [X] N/A Proprietary Information Included?[] YES; [X] NO Stand-Alone? [ ] YES; [X] NO

==

Description:==

Revision 0: Developed statistical analysis of instrument as-found/as-left data collected from past surveillances to determine a value that is representative of historical instrument drift and extrapolate a value for drift intended to be used in the development of setpoint and instrument uncertainty analyses in support of 24 month fuel extension.

Conclusions and Recommendations:

Revision 0: The bounding analyzed drift for NBI-PS-51A/B/C/D has been determined to be +/-1.926 % of Setpoint for 30 months (24 months plus 25% grace period) with a bias of -0.401% of Setpoint. The analyzed drift should be treated as a normally distributed, 2 sigma value when used in instrument uncertainty or setpoint calculations.

4 4 1 4 I 0 1 Rob Schmich ,

8/9/11 v

_,,,_ " I, Rev.

Number Status Prepared By/Date Reviewed By/Date IDVed By/Date Approved By/Date Status Codes

1. Active 4. Superseded or Deleted 7. PRA/PSA
2. Information Only 5. OD/OE Support Only
3. Pending 6. Maintenance Activity Support Only

Page: 2 of 4 NEDC: 11-109 Rev. Number: 0 5

ATrACHMENT 2 DESIGN CALCULATION CROSS-REFERENCE INDEXO Nebraska Public Power District DESIGN CALCULATION CROSS-REFERENCE INDEX ITEM REVISION PENDING CHANGES NUMBER DESIGN INPUTS NUMBER TO DESIGN INPUTS 1 EE 10-045 0 2 6.1LLS.301 7 3 6.2LLS.301 7 I I. 4.

I +

1 .1. 4.

I 1*

  • + +

I 4 +

4 4 4

4. I t I.
  • I

+ I

  • Page: 3 of 4 NEDC: 11-109 Rev. Number: 0 Nebraska Public Power District DESIGN CALCULATION CROSS-REFERENCE INDEX ITEM REVISION NUMBER AFFECTED DOCUMENTS NUMBER 1 NEDC92-050L 1 I.

I I I I I I I I 4- I t I

Page: 4 of 4 NEDC: 11-109 Rev. Number: 0 ATTACHMENT 3 AFFECTED DOCUMENT SCREENING The purpose of this form is to assist the Preparer in screening 2 new and revised design calculations to determine potential impacts to procedures and plant operations.

SCREENING QUESTIONS YES NO UNCERTAIN

1. Does it involve the addition, deletion, or manipulation of a component or [I [X] [I]

components which could impact a system lineup and/or checklist for valves, power supplies (breakers), process control switches, HVAC dampers, or instruments?

2. Could it impact system operating parameters (e.g., temperatures, flowrates, [] [X] []

pressures, voltage, or fluid chemistry)?

3. Does itimpact equipment operation or response such as valve closure [] [X] [

time?

4. Does it involve assumptions or necessitate changes to the sequencing of [] X] [

operational steps?

5. Does ittransfer an electrical load to a different circuit, or impact when [] [X] []

electrical loads are added to or removed from the system during an event?

6. Does it influence fuse, breaker, or relay coordination? [] [X] [
7. Does ithave the potential to affect the analyzed conditions of the [] [X I [I environment for any part of the Reactor Building, Containment, or Control Room?
8. Does itaffect TS/TS Bases, USAR, or other Licensing Basis documents? [ X] []
9. Does it affect a Dry Fuel Storage (CoC) or associated Technical [] [X] []

Specification, Dry Fuel Storage UFSAR, or CNS 10CFR72.212 Report?

10. Does it constitute any change or addition to, or removal from, the [ [X] [I Independent Spent Fuel Storage Installation (ISFSI) facility or spent fuel storage cask design, or procedures that affects a design function, method of performing or controlling the function, or an evaluation that demonstrates that intended functions will be accomplished?
11. Does itaffect DCDs? [] [X] []
12. Does it have the potential to affect procedures in any way not already [] [X ] []

mentioned (refer to review checklists in Procedure EDP-06)? Ifso, identify:

Ifall answers are NO, then additional review or assistance is not required.

Ifany answers are YES or UNCERTAIN, then the Preparer shall obtain assistance from the System Engineer and other departments, as appropriate, to determine impacts to procedures and plant operations. Affected documents shall be listed on Attachment 2.

Page: 1 of 9 NEDC: 11-109 Rev. Number: 0 ATTACHMENT 4 DESIGN CALCULATION SHEET Nebraska Public Power District DESIGN CALCULATIONS SHEET

1.0 Purpose and Scope

1.1 The purpose of this analysis is to establish realistic drift values and characteristics to be used by instrument uncertainty calculations for determination of setpoints and allowable values for Barksdale B2T-M12S pressure switches with tag numbers NBI-PS-51AIB/C/D.

1.2 The drift values are determined by the analysis of historical As Found / As Left data in accordance with the guidance and methods provided in Reference 2.1.3.

1.3 The results produced by this calculation are intended to be applied to NEDC92-050L when evaluating the instrument setpoint for 24 month fuel extension and As-Found and As-Left tolerances for implementation of TSTF-493 requirements.

2.0 References 2.1 METHODOLOGY 2.1.1 ANSI/ISA-S67.04-Part 1-2000, "Setpoints for Nuclear Safety Related Instrumentation" 2.1.2 ISA-RP67.04-Part 11-2000, "Methodologies for the Determination of Setpoints for Nuclear Safety-Related Instrumentation" 2.1.3 CNS Engineering Evaluation 10-045, Rev. 0, "Instrument Drift Analysis Design Guide" 2.1.4 EPRI TR-103335R1, "Statistical Analysis of Instrument Calibration Data; Guidelines for Instrument Calibration Extension / Reduction Programs," October, 1998 2.1.5 DOE Re'search and Development Report No. WAPD-TM-1292, "Statistics for Nuclear Engineers and Scientists Part 1: Basic Statistical Inference," February 1981 2.1.6 NRC Generic Letter 91-04, "Changes in Technical Specification Surveillance Requirements to Accommodate a 24 Month Fuel Cycle," April 2, 1991 2.1.7 American National Standard N15.15-1974, "Assessment of the Assumption of Normality (Employing Individual Observed Values)"

2.2 CALCULATIONS 2.2.1 NEDC92-050L, Rev 1,"Calculation of Calibration Values for Low-Low Set Pressure Switches"

Page: 2 of 9 NEDC: 11 -109 Rev. Number: 0 ATTACHMENT 4 DESIGN CALCULATION SHEET Nebraska Public Power District DESIGN CALCULATIONS SHEET 2.3 MISCELLANEOUS REFERENCES 2.3.1 CNS Technical Specifications, Table 3.3.6.3-1, Function 2, Amendment 178 2.3.2 Equipment Data File (EDF) 2.3.3 Surveillance Procedure 6.1LLS.301, Rev. 7, "LLS Reactor Pressure Permissive Channel Calibration and Logic Tests (Reactor in Mode 1) (Div 1)" and Surveillance Procedure 6.2LLS.301, Rev. 7, "LLS Reactor Pressure Permissive Channel Calibration and Logic Tests (Reactor in Mode 1) (Div 2)"

3.0 Assumptions 3.1 This drift calculation employs those assumptions customarily used for standard statistical analyses, as directed by Reference 2.1.3, such as the assumption that a distribution is normal and the use of statistical tests to confirm this hypothesis.

3.2 For drift calculations, changes in ambient conditions during calibration are of concern, since the temperature effects, humidity effects, etc.; at the time of calibration are the only environmental effects which would affect the calibration readings. During calibration, the ambient environment should be reasonably controlled, since the calibrating technicians will need to be present for the calibration process. The devices analyzed within this calculation are assumed to have similar ambient environments during calibration conditions, such that any difference in calibration conditions will not significantly affect the calibration readings. Thus, these minor variations in room environmental conditions are judged to have an insignificant impact on performance, and would not be considered to be a reason that the instrumentation would be separated for analysis. Additionally, any residual effects due to operation at different temperatures in the individual rooms are considered negligible. Minor residual effects of temperature or minor variations in temperature during calibration are expected to be present during any calibration and would be indistinguishable from drift. Therefore temperature is not tracked during calibration of instruments.

Page: 3 of 9 NEDC: 11 - 109 Rev. Number: 0 ATTACHMENT 4 DESIGN CALCULATION SHEET Nebraska Public Power District DESIGN CALCULATIONS SHEET 4.0 Design Inputs 4.1 Reference 2.2.1 provided the instrument manufacturer and model number.

4.2 Reference 2.3.1 provided the applicable Technical Specification sections (3.3.6.3).

4.3 Reference 2.3.1 provided the required channel calibration frequency.

4.4 Reference 2.2.1 provided the old Surveillance Procedure numbers which were then traced to the new Surveillance Procedure numbers.

4.5 Calibration Records for the subject instruments were collected for a ten year period ending 12/31/09.

6.0 Methodology 5.1 The methodology used for this analysis can be found in Reference 2.1.3, supplemented by References 2.1.1, 2.1.2, 2.1.4 and 2.1.7. An overview of the methodology is provided in Section 5.3.

5.2 The devices covered by this calculation are required to be calibrated once every 18 months by Tech Spec SR 3.3.6.3.4 (Reference 2.3.1). However, since the same Surveillance Procedures (Reference 2.3.3) are used to satisfy Tech Spec SR 3.3.6.3.3 (channel functional test- 92 day frequency), SR 3.3.6.3.4 (channel calibration - 18 month frequency) and SR 3.3.6.3.5 (logic system functional test - 18 month frequency),

As-Found / As-Left data is collected at least once every 92 days. Although necessary, this practice causes a problem in that the interval between calibrations are shorter and therefore increases the uncertainty associated with extending the maximum calibration interval to 24 months plus the 25% grace period.

Therefore, for the purpose of this calculation, determination of historical drift will be based on the As-Found / As-Left data for consecutive calibration activities that do not exceed 18 months (542 days). There will be only three (3) exceptions to this rule; 1) when an 18 month interval is interrupted by maintenance activities (i.e., setpoint change, troubleshooting, instrument change, etc.), 2) when a setpoint adjustment was made as indicated by a difference in the As-Found / As-Left data recorded on the same date, and

3) missing historical data. Any of these 3 occurrences will mark the end date one calibration interval and the beginning of the next.

This approach accurately models the instrument performance given that the historical data (Reference 4.5) shows that the instruments have operated within the As-Found tolerance band specified in the Surveillance Procedures (Reference 2.3.3) for much longer than 18 months. Furthermore, this approach is inherently conservative in that the analysis will include every instance of an instrument's As-Found data exceeding the tolerance specified in the Surveillance Procedures (Reference 2.3.3) with a time interval less than 18 months which will tend to increase the analyzed drift.

Finally, a study period of 10 years has been chosen as it represents more than six of the currently required 18 month calibration cycles, and five of the proposed 24 month

Page: 4 of 9 NEDC: 11 - 109 Rev. Number: 0 ATTACHMENT 4 DESIGN CALCULATION SHEET Nebraska Public Power District DESIGN CALCULATIONS SHEET calibration cycles, which is adequate to understand the component's performance over time. Also, a sufficient number of valid drift values are provided as a result of the selected study period to make a statistically valid pool. Therefore, As-Found and As-Left Data values are entered from calibrations occurring for at least the last 10 years.

5.3 Determination of the Analyzed Drift is as follows:

5.3.1 Gather and Generate Raw Drift Data: All retrievable As-Left and As-Found data is collected for each calibration performed on each device covered by this report, for the study period. Per Section 3.4.2 of Reference 2.1.3, "The goal is to collect enough data for the instrument or group of instruments to make a statistically valid pool."

In addition to gathering the As-Found and As-Left data, and computing the drift values and time intervals, this step also involves an investigation into whether all of the devices should be analyzed together, or whether they should be separated into smaller analysis groups. Finally, this step involves careful screening of the input data for errors or other situations that could disrupt the proper determination of drift.

5.3.2 Determination of Outliers and Statistical Summary: Per Section 3.6.3 of Reference 2.1.3, if outliers are detected in a drift data set, the calculation preparer is allowed to remove only one additional outlier from the data set, if the outlier is judged to be an erroneous point, which would tend to skew the representation of the distribution of data.

Due to the differences in setpoints of the pressure switches (NBI-PS-51A is 1037 psig, NBI-PS-51C is 1027 psig, and NBI-PS-51B and D are 887 psig), the drifts are calculated as a "%of Setpoint", and all further analysis is performed using drift % of Setpoint values.

A "t-Test" is performed on the data to detect any outliers, and remove up to one, if appropriate. Additionally, the basic statistical values which describe the group of drift data are derived in this step, including such parameters as Mean, Standard Deviation, Count, Median, Minimum, Maximum, etc.

5.3.3 Tests for Normality: Per Sections 3.7.2 and 3.7.3 of Reference 2.1.3, a statistical test (W or D-Prime, depending on sample size) is performed on the drift data to support the hypothesis that the data conforms to a normal distribution. If this test is unable to support that hypothesis, a Coverage Analysis is then performed to ensure that the data can be conservatively modeled by a normal distribution and to provide an adjustment to the standard deviation of the drift model, if necessary, to conservatively envelop the observed data population.

5.3.4 Time-Dependency

Per Sections 3.9.2 and 3.9.3 of Reference 2.1.3, Scatter Plots and a time-based Binning Analysis are developed for the data to establish the time-dependency of the drift. If enough drift data exists for significantly different time intervals, regression analysis is performed to aid in the

Page: 5 of 9 NEDC: 11-109 Rev. Number: 0 ATTACHMENT 4 DESIGN CALCULATION SHEET Nebraska Public Power District DESIGN CALCULATIONS SHEET determination of time-dependency. Based on criteria provided in Sections 3.9.2 and 3.9.3 of Reference 2.1.3, drift data is categorized as either "strongly time dependent" or "moderately time dependent" for the purpose of extrapolation.

5.3.5 Analyzed Drift Derivation and Characterization: The drift values are determined for the current calibration interval. These values are extrapolated for a 30 month calibration interval (24 months plus 25% grace period), based on the methods prescribed in Section 4.6 of Reference 2.1.3, depending on the degree of time-dependency derived for the drift data.

5.4 The mathematical computations of the statistical analysis are performed within a Microsoft Excel spreadsheet using statistical functions available within Excel including the "Analysis ToolPak". Spreadsheet results are printed out and presented in Appendix 1 to this calculation. Excel spreadsheets generally compute values to a 15 decimal resolution, which is well beyond any required rounding for engineering analyses.

However, values reported in this calculation may be displayed to lesser resolution.

Therefore, it is likely that hand computations will produce slightly different results, because of using rounded numbers in initial and intermediate steps, but the Excel computed values are considered highly accurate in comparison.

5.5 Acceptance Criteria: Since the purpose of the analysis is to generate a value and description of the characteristics of the drift of the evaluated make/model, there are no specific acceptance criteria.

6.0 Calculations 6.1 Gather and Generate Raw Error Data 6.1.1 Specifically, this analysis addresses NBI-PS-51 AIB/C/D. These switches have an identical manufacturer and model number (Barksdale B2T-M 12SS Pressure Switches), identical adjustable ranges and are used in similar applications. The setpoints during the 10 year study period were either 887, 1027 or 1037 psig.

However, a pooling test is performed as described in Section 6.1.6 to confirm proper pooling of the drift data for analysis. As described previously in Section 5.3.2, the drift data is converted to % of Setpoint to facilitate pooling of data from instruments with greater than a 5% difference in Setpoint value.

6.1.2 Pages 1 through 7 of Appendix 1 provide a listing of the historical As-Left (AL) and As-Found (AF) data from Reference 2.3.3, with any data exclusions or modifications noted. Setpoints, calibration dates and calibration notes were also obtained from Reference 2.3.3. This data is entered into an Excel spreadsheet for computation of the drift values, time intervals between calibrations and statistical analysis as described in Section 5.2 above.

6.1.3 A screening of the initial input data from Reference 2.3.3 was performed. No historical data was removed from the data set.

Page: 6 of 9 NEDC: 11-109 Rev. Number: 0 ATTACHMENT 4 DESIGN CALCULATION SHEET Nebraska Public Power District DESIGN CALCULATIONS SHEET 6.1.4 Per the methodology of Section 4.1.1.11 of Reference 2.1.3, drift is computed by subtracting the As-Left data of one calibration from the As-Found data of the next calibration, as documented in pages 8 through 18 of Appendix 1. These pages also document the time interval between calibrations (in the number of days and months) by subtracting the As-Left date of one calibration from the As-Found date of the next calibration, per Section 4.1.1.10 of Reference 2.1.3.

6.1.5 Pages 8 through 18 of Appendix 1 import the Sequence ID, the Tag No., the AF

/ AL flags, the dates of calibration and the As-Found and As-Left data from Reference 2.3.3 and compute the interval between calibrations. Pages 8 and 9 of Appendix 1 compute the drift values and summarize the time intervals computed. As an example of the equations used, the first drift value and time interval are computed as follows. The rest of the values are computed identically.

NBI-PS-51A, Sequence ID 1 Drift = AF (11/11/09) - AL (7/30/09)

= 1022 psi (From Seq. 1) - 1026.7 psi (From Seq. 4)

= -4.7 psi Cal Interval (Days) = 11/25/09-7/30/09

= 104 Days Cal Interval (Mo.) = Cal Interval (Days) x 12 Months / 365.25 Days

= 3.4 Months 6.1.6 The two groups of switches are defined as follows:

Group 1: Barksdale B2T-M12SS Pressure Switches, NBI-PS-51A/C; Setpoints of 1037 and 1027 psig respectively Group 2: Barksdale B2T-M12SS Pressure Switches, NBI-PS-51B/D; Setpoint of 887 psig In accordance with Section 3.5.4 of Reference 2.1.3, a test is performed to determine acceptability for pooling groups 1 and 2 on page 23 of Appendix 1.

The "t Statistic" is less than the "t Critical two-tail value", indicating that combination of the groups for analysis is appropriate. The means and standard deviations are similar. Therefore, the groups of data are combined for drift analysis.

6.2 Determination of Outliers and Statistical Summary 6.2.1 The outlier analysis is recorded on pages 19 and 20 of Appendix 1. These pages display the Sequence ID, Tag ID, Drift, and Calibration Interval (in units of Days).

Page: 7 of 9 NEDC: 11 - 109 Rev. Number: 0 ATTACHMENT 4 DESIGN CALCULATION SHEET Nebraska Public Power District DESIGN CALCULATIONS SHEET The critical T value used in the outlier analysis comes directly from Table 2 of Reference 2.1.3.

As shown on page 19 of Appendix 1, one outlier was detected and removed from further analysis. The Final Data Set (FDS) for this analysis is documented on pages 19 and 20 of Appendix 1 and is identical to the Initial Data Set with the one outlier removed.

6.2.2 A summary of the required statistical values for the Final Data Set, per Section 4.2 of Reference 2.1.3, is developed within the outlier analysis on page 20 of Appendix 1.

6.3 Tests for Normality 6.3.1 Since the FDS contains less than 50 samples, the W Test is performed on the data to test for normality, as shown on pages 21 through 22 of Appendix 1. Per Section 3.7.3 of Reference 2.1.3, the details of the W Test methodology are shown in Reference 2.1.7. Equations used are listed on page 21 of Appendix 1, and the results are provided on page 22. Since the calculated W statistic (0.9067) is less than the critical value for W (0.947), this test rejects the assumption of normality for this data set.

6.3.2 Since the data does not pass the W Test for normality, a Coverage Analysis is necessary. For the Coverage Analysis, a Histogram is developed on pages 24 and 25 of Appendix 1, per Sections 3.7.5 and 4.4 of Reference 2.1.3. To generate the histogram data, the drift % of Setpoint values are categorized into 12 bins, in relation to the mean and standard deviation. These bins are generated in multiples of 2Standard Deviation increments, and the bin maximum values are derived in accordance with the methods given in Section 19 (Appendix C) of Reference 2.1.4. (See column headings for specific formulas used for the Maximums.)

Expected numbers of data points within each bin are calculated, assuming that the data is a normal distribution and that the data set is exactly representative of a normal curve. The population percentages within each bin are derived from Table 18-2 of Reference 2.1.4, which describe the percentage populations within the identified bins. These percentages are then multiplied by the total data population to determine the expected number of values within each bin, for the size of the data set. The observed population within each bin is tabulated and plotted as a bar chart versus the ideal normal curve for comparison.

The Histogram on page 25 of Appendix 1 shows that the data is less peaked in the middle than a normal distribution. However, the Kurtosis value is slightly negative, which signifies a wider peak around the mean (that is, a higher probability than a normally distributed variable of values near the mean) and thinner tails. It is observed that the actual percentage population of data within +

2 standard deviations is greater than with a normal distribution. Therefore, the

Page: 8 of 9 NEDC: 11 - 109 Rev. Number: 0 ATTACHMENT 4 DESIGN CALCULATION SHEET Nebraska Public Power District DESIGN CALCULATIONS SHEET data may be conservatively modeled as a normal distribution without adjustment to the standard deviation.

6.4 Time-Dependency 6.4.1 In order to determine time-dependency of the drift data, the data is first plotted as a scatter plot on page 26 of Appendix 1, in accordance with the methodology of Section 4.5.1 of Reference 2.1.3. The trend line within this scatter plot is very flat and stays slightly below zero. Data scatter does not show an increase over time.

The trend line and the associated equation are also noted on the scatter plot.

6.4.2 The binning analysis is performedon pages 27 and 28 of Appendix 1. The drift and time interval data are divided into bins, based on the intervals between calibrations as defined in Section 3.9.3.1 of Reference 2.1.3. Statistical summaries for each bin, including count, mean, standard deviation, mean time interval and maximum observed time interval are computed. Excel functions are used to determine the statistical summary values for each bin, and are used explicitly from Sections 4.2.1, 4.2.2, 4.2.3 and 4.2.7 of Reference 2.1.3. This information is presented on page 27 of Appendix 1. Per Section 3.9.3.4 of Reference 2.1.3, after removing those bins with 5 or less data points and those with less than or equal to 10% of total population, Bins 2 through 5 remain.

Page 28 of Appendix 1 displays a plot of the means and standard deviations of the drift data versus the average time interval between calibrations for the subject bins, in accordance with Section 4.5.2 of Reference 2.1.3. It also provides all of the binning parameters and statistics that are a part of the binning analysis. The mean value of the data is a small negative value (near -0.2 % of Setpoint) for all bins. The line is quite stable, except for an outlier for bin 4, which is not indicative of time dependency of the bias portion. Also, from this plot, the standard deviation is stable near 0.6 % of Setpoint for all bins, which also is not indicative of time-dependency.

6.4.3 Per Section 3.9.4 of Reference 2.1.3, a drift regression analysis is performed within pages 29 and 30 of Appendix 1. The equations and functions used by the Excel spreadsheet are taken specifically from Section 3.9.4 of Reference 2.1.3.

The regression analysis output shows an R Squared Value (0.0006384) less than 0.09, a P Value (0.8631825) greater than 0.05 and an F Value (0.0300228) less than F Critical (3.195056). All three of these comparisons indicate no significant time dependency. Although no significant time dependency is indicated in the data, the bias portion of drift is conservatively treated as moderately time-dependent for the purpose of extrapolation.

6.4.4 Per Section 3.9.4 of Reference 2.1.3, an absolute value drift regression analysis is performed within pages 31 and 32 of Appendix 1. The drift data is converted into absolute value via the Excel ABS function for each drift data value. The equations and functions used by Excel for the Regression analysis are taken specifically from Section 3.9.4 of Reference 2.1.3. This regression analysis

Page: 9 of 9 NEDC: 11 - 109 Rev. Number: 0 ATTACHMENT 4 DESIGN CALCULATION SHEET Nebraska Public Power District DESIGN CALCULATIONS SHEET output shows an R Squared Value (0.00677813) less than 0.09, a P Value (0.57385422) greater than 0.05, and an F Value (0.32074597) less than F Critical (3.195056). These results all indicate that the random portion of drift is not significantly time-dependent, and the trend lines from the binning plot and this regression plot show either no slope or a slightly decreasing slope. Therefore, the random portion of drift is treated as moderately time-dependent for the purpose of extrapolation.

6.5 Analyzed Drift (DA) Derivation and Characterization 6.5.1 As shown on page 33 of Appendix 1, per Section 3.11 of Reference 2.1.3, the drift bias error is evaluated for significance. The degrees of freedom are computed from the data count, and the value of t is looked up in Table 4 of Reference 2.1.3. The Significant Bias Critical Value (Xcrit) is computed and compared to the Absolute Value of the Average of the Final Data Set. The bias value for this drift data set is determined to be significant, since the Absolute Value of the Average is less than the xcrit value. The mean of the Final Data Set (FDS) is used with the average observed time interval from Bin 5 as the starting point. Note that the mean for the FDS is conservatively used, since it is larger than the mean for the data within Bin 5. The Analyzed Drift Bias term DAbias is extrapolated to a maximum calibration interval of 30 months per the equation within Section 4.6 of Reference 2.1.3. Therefore, the Analyzed Drift Bias term (DAbias(extrap)) is calculated to be -0.401% of Setpoint.

6.5.2 Per Section 4.6.6 of Reference 2.1.3, the random portion of the Analyzed Drift is determined from multiplying the standard deviation of the data within Bin 5 by the Tolerance Interval Factor (TIF) and Normality Adjustment Factor (NAF), and extrapolating as required to a calibration interval of 30 months. Note that the standard deviation of the FDS data is conservatively used, since it is larger than the standard deviation for longest interval valid time bin (bin 5). The random portion of drift has been determined to be moderately time-dependent for the purpose of extrapolation. The standard deviation of the FDS data is used with the average observed time interval from Bin 5 on page 27 of Appendix 1 as the starting point. The TIF is obtained from Table 1 of Reference 2.1.3 as 2.408 for a 95/95 significance. The computation of this value is shown on page 33 of Appendix 1 to result in a DArandom(etrap) term of +/- 1.926% of Setpoint.

7.0 Summary of Results and Conclusions The bounding Analyzed Drift (DA) for NBI-PS-51A/B/C/D has been determined to be +/-1.926 %

of Setpoint for 30 months (24 months + 25%) with a bias term of -0.401% of Setpoint. The Analyzed Drift should be treated as a normally distributed, 2a value for uncertainty analysis.

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Input Data Page 1 of 33 Seq AFI AL ID Tag ID Date Procedure MakelModel AFI AL Setpt Data Units Comments 1 NBI-PS-51A 11/11/09 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1022 psig 2 NBI-PS-51A 11/11/09 6.ILLS.301 Barksdale B2T-M12SS AL 1027 1022 psig 3 NBI-PS-51A 7/30/09 6.1 LLS.301 Barksdale B2T-M12SS AF 1027 1034.2 psig Adjustment made 4 NBI-PS-51A 7/30/09 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1026.7 psig Adjustment made 5 NBI-PS-51A 5/1/09 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1030 psi_

6 NBI-PS-51A 5/1/09 6.ILLS.301 Barksdale B2T-M12SS AL 1027 1030 psi _

7 NBI-PS-51A 1/29/09 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1025.9 psi __

8 NBI-PS-51A 1/29/09 6.1LLS.301 Barksdale B2T-M 12SS AL 1027 1025.9 psi _

9 NBI-PS-51A 10/27/08 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1029.9 psi _

10 NBI-PS-51A 10/27/08 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1029.9 psi _

11 NBI-PS-51A 7/30/08 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1031 psi _

12 NBI-PS-51A 7/30/08 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1031 psi_!

13 NBI-PS-51A 5/6/08 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1028.8 psi _

14 NBI-PS-51A 5/6/08 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1028.8 psi _

15 NBI-PS-51A 4/9/08 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1029 psig 16 NBI-PS-51A 4/9/08 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1029 psi_9 17 NBI-PS-51A 1/31/08 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1025.5 psi _

18 NBI-PS-51A 1/31/08 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1025.5 psig 19 NBI-PS-51A 11/2/07 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1028 psig 20 NBI-PS-51A 11/2/07 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1028 psig 21 NBI-PS-51A 8/2/07 6.ILLS.301 Barksdale B2T-M12SS AF 1027 1030 psig 22 NBI-PS-51A 8/2/07 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1030 psig 23 NBI-PS-51A 5/4/07 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1029 psig 24 NBI-PS-51A 5/4/07 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1029 psij 25 NBI-PS-51A 11/19/06 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1027 psig 26 NBI-PS-51A 11119/06 6.ILLS.301 Barksdale B2T-M12SS AL 1027 1027 psig 27 NBI-PS-51A 8/3/06 6.1LLS.301 Barksdale B2T-M 12SS AF 1027 1031 psig 28 NBI-PS-51A 8/3/06 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1031 psig 29 NBI-PS-51A 5/5/06 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1028 psig 30 NBI-PS-51A 5/5/06 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1028 Sig 31 NBI-PS-51A 2/2/06 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1023 psig 32 NBI-PS-51A 2/2/06 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1023 psig 33 NBI-PS-51A 11/3/05 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1025.6 psil 34 NBI-PS-51A 11/3/05 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1025.6 psig 35 NBI-PS-51A 8/4/05 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1029 psig 36 NBI-PS-51A 8/4/05 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1029 psig 37 NBI-PS-51A 5/19/05 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1027.7 1 psi _

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix I Input Data Page 2 of 33 Seq AF AL ID Tag ID Date Procedure Make/Model AF! AL Setpt Data Units Comments

-38 NBI-PS-51A 5-19/05 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1027.7 psig 39 NBI-PS-51A 2/25/05 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1027.5 psig 40 NBI-PS-51A 2/25/05 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1027.5 psig 41 NBI-PS-51A 12/3/04 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1025 psig 42 NBI-PS-51A 12/3/04 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1025 psig 43 NBI-PS-51A 91/10/04 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1028 psig 44 NBI-PS-51A 9/10/04 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1028 psig 45 NBI-PS-51A 6/18/04 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1030 psig 46 NBI-PS-51A 6/18/04 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1030 psig 47 NBI-PS-51A 3/26/04 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1024 pig 48 NBI-PS-51A 3/26/04 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1024 psig 49 NBI-PS-51A 1/2/04 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1027 psig 50 NBI-PS-51A 1/2/04 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1027 psig 51 NBI-PS-51A 10/10/03 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1026 psig 52 NBI-PS-51A 10/10/03 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1026 s 53 NBI-PS-51A 7/18/03 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1026 psig 54 NBI-PS-51A 7/18/03 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1026 psig 55 NBI-PS-51A 5/22/03 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1027.7 psig 56 NBI-PS-51A 5/22/03 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1027.7 psig 57 NBI-PS-51A 1/31/03 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1024 psig 58 NBI-PS-51A 1/31/03 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1024 psig 59 NBI-PS-51A 11/8/02 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1025 psig 60 NBI-PS-51A 11/8/02 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1025 psig 61 NBI-PS-51A 8/16/02 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1029.8 psig 62 NBI-PS-51A 8/16/02 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1029.8 psig 63 NBI-PS-51A 5/122/02 6.ILLS.301 Barksdale B2T-M12SS AF 1027 1025 psig 64 NBI-PS-51A 5/22/02 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1025 psig 65 NBI-PS-51A 2/28/02 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1022 psig 66 NBI-PS-51A 2/28/02 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1022 psig 67 NBI-PS-51A 12/7/01 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1028 psig 68 NBI-PS-51A 12/7/01 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1028 psig 69 NBI-PS-51A 9/13/01 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1029 psig 70 NBI-PS-51A 9/13/01 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1029 pig 71 NBI-PS-51A 6/21/01 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1030 psig 72 NBI-PS-51A 6/21/01 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1030 psig 73 NBI-PS-51A 3/29/01 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1026 psig

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Input Data Page 3 of 33 Seq AF/ AL ID Tag ID Date Procedure Make/Model AF/ AL Setpt Data Units Comments 74 NBI-PS-51A 3/29/01 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1026 psig 75 NBI-PS-51A 1/4/01 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1024 Psi_

76 NBI-PS-51A 1/4/01 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1024 psi_

77 NBI-PS-51A 10/12/00 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1027 psig 78 NBI-PS-51A 10/12/00 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1027 psig 79 NBI-PS-51A 7/20/00 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1028 Psi_

80 NBI-PS-51A 7/20/00 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1028 psi __

81 NBI-PS-51A 4/26/00 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1029 Psig 82 NBI-PS-51A 4/26/00 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1029 psi _

83 NBI-PS-51A 2/3/00 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1024 psig 84 NBI-PS-51A 2/3/00 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1024 psi _

85 NBI-PS-51A 11/10/99 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1024 psig 86 NBI-PS-51A 11/10/99 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1024 psig 87 NBI-PS-51A 10/14/99 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1030 psi _

88 NBI-PS-51A 10/14/99 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1030 psig 89 NBI-PS-51A 9/15/99 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1028 psig 90 NBI-PS-51A 9/15/99 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1028 psig 91 NBI-PS-51A 8/18/99 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1030 psig 92 NBI-PS-51A 8/18/99 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1030 psig 93 NBI-PS-51A 7/21/99 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1030 psig 94 NBI-PS-51A 7/21/99 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1030 psig 95 NBI-PS-51A 6/23/99 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1032 psig 96 NBI-PS-51A 6/23/99 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1032 psig 97 NBI-PS-51A 5/26/99 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1027 psig 98 NBI-PS-51A 5/26/99 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1027 psig 99 NBI-PS-51A 4/28/99 6.11LLS.301 Barksdale B2T-M12SS AF 1027 1030 psig 100 NBI-PS-51A 4/28/99 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1030 Psig 101 NBI-PS-51A 4/1/99 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1028 Psig 102 NBI-PS-51A 4/1/99 6.1LLS.301 Barksdale B2T-M12SS AL 1027 1028 Psig 103 NBI-PS-51A 3/3/99 6.1LLS.301 Barksdale B2T-M12SS AF 1027 1025 psig 104 NBI-PS-51A 3/3/99 6.11LLS.301 Barksdale B2T-M12SS AL 1027 1025 psigl 105 NBI-PS-51B 11/11/09 6.1LLS.301 Barksdale B2T-M12SS AF 887 883 psig 106 NBI-PS-51B 11/11/09 6,ILLS.301 Barksdale B2T-M12SS AL 887 883 psig 107 NBI-PS-51B 7/30/09 6.1LLS.301 Barksdale B2T-M12SS AF 887 893.1 psig Adjustment made 108 NBI-PS-51B 7/30/09 6.1LLS.301 Barksdale B2T-M12SS AL 887 887.6 psig Adjustment made 109 NBI-PS-51B 5/1/09 6.1LLS.301 Barksdale B2T-M12SS AF 887 890 Psig

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Input Data Page 4 of 33 Seq AF/ AL ID Tag ID Date Procedure MakelModel AF AL Setpt Data Units Comments 110 NBI-PS-51B 5/1/09 6.1LLS.301 Barksdale B2T-M12SS AL 887 890 psi9 111 NBI-PS-51B 1/29/09 6.1LLS.301 Barksdale B2T-M12SS AF 887 877 Sig Adjustment made 112 NBI-PS-51B 1/29/09 6.1LLS.301 Barksdale B2T-M12SS AL 887 889 psig Adjustment made 113 NBI-PS-51B 10/27/08 6.1LLS.301 Barksdale B2T-M12SS AF 887 887 psig 114 NBI-PS-51B 10/27/08 6.1LLS.301 Barksdale B2T-M12SS AL 887 887 psi9 115 NBI-PS-51B 7/30/08 6.1LLS.301 Barksdale B2T-M12SS AF 887 884 psig 116 NBI-PS-51B 7/30/08 6.1LLS.301 Barksdale B2T-M12SS AL 887 884 psig 117 NBI-PS-51B 5/6/08 6.1LLS.301 Barksdale B2T-M12SS AF 887 882 psi9 118 NBI-PS-51B 5/6/08 6.1LLS.301 Barksdale B2T-M12SS AL 887 882 psig 119 NBI-PS-51B 4/9/08 6.1LLS.301 Barksdale B2T-MI2SS AF 887 888 p01 120 NBI-PS-51B 4/9/08 6.1LLS.301 Barksdale B2T-M12SS AL 887 888 psig 121 NBI-PS-51B 1/31/08 6.1LLS.301 Barksdale B2T-M12SS AF 887 881 psig Adjustment made 122 NBI-PS-51B 1/31/08 6.1LLS.301 Barksdale B2T-M12SS AL 887 886 psig Adjustment made 123 NBI-PS-51B 11/2/07 6.1LLS.301 Barksdale B2T-M12SS AF 887 885 psig 124 NBI-PS-51B 11/2/07 6.1LLS.301 Barksdale B2T-M12SS AL 887 885 psig 125 NBI-PS-51B 8/2/07 6.1LLS.301 Barksdale B2T-M12SS AF 887 895 psig Adjustment made 126 NBI-PS-51B 8/2/07 6.1LLS.301 Barksdale B2T-M12SS AL 887 888 psig Adjustment made 127 NBI-PS-51 B 5/4/07 6.1LLS.301 Barksdale B2T-M12SS AF 887 891.4 psig 128 NBI-PS-51B 5/4/07 6.1LLS.301 Barksdale B2T-M12SS AL 887 891.4 psi _

129 NBI-PS-51B 11/19/06 6.1LLS.301 Barksdale B2T-M12SS AF 887 885 psi _

130 NBI-PS-51B 11/19/06 6.1LLS.301 Barksdale B2T-M12SS AL 887 885 psig 131 NBI-PS-51B 8/3/06 6.1LLS.301 Barksdale B2T-M12SS AF 887 888.5 psig 132 NBI-PS-51B 8/3/06 6.1LLS.301 Barksdale B2T-M12SS AL 887 888.5 psig 133 NBI-PS-51B 5/5/06 6.1LLS.301 Barksdale B2T-M12SS AF 887 885 psi __

134 NBI-PS-51B 5/5/06 6.1LLS.301 Barksdale B2T-M12SS AL 887 885 psig 135 NBI-PS-51B 2/2/06 6.1LLS.301 Barksdale B2T-M12SS AF 887 885.8 psi _

136 NBI-PS-51B 2/2/06 6.1LLS.301 Barksdale B2T-M12SS AL 887 885.8 psi _

137 NBI-PS-51B 11/3/05 6.1LLS.301 Barksdale B2T-M12SS AF 887 887.3 psi _

138 NBI-PS-51B 11/3/05 6.1LLS.301 Barksdale B2T-M12SS AL 887 887.3 psi __

139 NBI-PS-51B 8/4/05 6.1LLS.301 Barksdale B2T-M12SS AF 887 890.5 psiL 140 NBI-PS-51 B 8/4/05 6.1 LLS.301 Barksdale B2T-M12SS AL 887 890.5 psig 141 NBI-PS-51B 5/19105 6.1LLS.301 Barksdale B2T-M12SS AF 887 889.3 psig 142 NBI-PS-51B 5119/05 6.1LLS.301 Barksdale B2T-M12SS AL 887 889.3 psig 143 NBI-PS-51B 2/25/05 6.1LLS.301 Barksdale B2T-M12SS AF 887 888 psig 144 NBI-PS-51B 2/25/05 6.1LLS.301 Barksdale B2T-M12SS AL 887 888 psig 145 NBI-PS-51B 12/3/04 6.1LLS.301 Barksdale B2T-M12SS AF 887 887 psi_

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M 12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Input Data Page 5 of 33 Seq AF/ AL ID Tag ID Date Procedure Make/Model AF/ AL Setpt Data Units Comments 146 NBI-PS-51 B 12/3/04 6.1LLS.301 Barksdale B2T-M12SS AL 887 887 Sig 147 NBI-PS-51B 9/10/04 6.1LLS.301 Barksdale B2T-M12SS AF 887 892 psi__

148 NBI-PS-51B 9/10/04 6.1LLS.301 Barksdale B2T-M12SS AL 887 892 psig 149 NBI-PS-51B 6/18/04 6.1LLS.301 Barksdale B2T-M12SS AF 887 891 Psig 150 NBI-PS-51B 6/18/04 6.1 LLS.301 Barksdale B2T-M12SS AL 887 891 pSig 151 NBI-PS-51 B 3/26/04 6.1 LLS.301 Barksdale B2T-M12SS AF 887 881 psig Adjustment made 152 NBI-PS-51 B 3/26/04 6.1 LLS.301 Barksdale B2T-M12SS AL 887 887 psig Adjustment made 153 NBI-PS-51B 1/2/04 6.1LLS.301 Barksdale B2T-M12SS AF 887 882 psig 154 NBI-PS-51 B 1/2/04 6.1LLS.301 Barksdale B2T-M12SS AL 887 882 psig 155 NBI-PS-51 B 10/10/03 6.1 LLS.301 Barksdale B2T-M12SS AF 887 885 psig 156 NBI-PS-51B 10/10/03 6.1 LLS.301 Barksdale B2T-M12SS AL 887 885 psig 157 NBI-PS-51B 7/18/03 6.1LLS.301 Barksdale B2T-M12SS AF 887 880 psig Adjustment made 158 NBI-PS-51 B 7/18/03 6.1 LLS.301 Barksdale B2T-M 12SS AL 887 887 psig Adjustment made 19 NAdjusted 51 B - Outside of Instrument 159 NBI-PS-51B 5/22/03 6.1LLS.301 Barksdale B2T-M12SS AF 887 psig Limit, Violated TS AV 160 NBI-PS-51B 5/22/03 6.1LLS.301 Barksdale B2T-M12SS AL 887 psig 161 NBI-PS-51B 1/31/03 6.1LLS.301 Barksdale B2T-M12SS AF 887 882 psi _

162 NBI-PS-51B 1/31/03 6.1LLS.301 Barksdale B2T-M12SS AL 887 882 Psig 163 NBI-PS-51B 11/8/02 6.1LLS.301 Barksdale B2T-M12SS AF 887 882 psig 164 NBI-PS-51B 11/8/02 6.1LLS.301 Barksdale B2T-M12SS AL 887 882 _Sig 165 NBI-PS-51 B 8/16/02 6.1 LLS.301 Barksdale B2T-M12SS AF 887 886 psig 166 NBI-PS-51 B 8/16/02 6.1 LLS.301 Barksdale B2T-M12SS AL 887 886 ptsi 167 NBI-PS-51B 5/22/02 6.1LLS.301 Barksdale B2T-M12SS AF 887 883 psig 168 NBI-PS-51B 5/22/02 6.1 LLS.301 Barksdale B2T-M12SS AL 887 883 psig 169 NBI-PS-51B 2/28/02 6.1LLS.301 Barksdale B2T-M12SS AF 887 882 psigL 170 NBI-PS-51B 2/28/02 6.1LLS.301 Barksdale B2T-M12SS AL 887 882 psig 171 NBI-PS-51B 12/7/01 6.1LLS.301 Barksdale B2T-M12SS AF 887 886 Psig 172 NBI-PS-51B 12/7/01 6.1LLS.301 Barksdale B2T-M12SS AL 887 886 psi _

173 NBI-PS-51B 9/13/01 6.1ILLS.301 Barksdale B2T-M12SS AF 887 888 psig 174 NBI-PS-51B 9/13/01 6.1LLS.301 Barksdale B2T-M12SS AL 887 888 psig 175 NBI-PS-51B 6/21/01 6.1LLS.301 Barksdale B2T-M12SS AF 887 888 Psig 176 NBI-PS-51B 6/21/01 6.1LLS.301 Barksdale B2T-M12SS AL 887 888 psig 177 NBI-PS-51B 3/29/01 6.1ILLS.301 Barksdale B2T-M12SS AF 887 884 Psig 178 NBI-PS-51B 3/29/01 6.1LLS.301 Barksdale B2T-MI12SS AL 887 884 Psig 179 NBI-PS-51B 1/4/01 6.1LLS.301 Barksdale B2T-M12SS AF 887 880 psig Adjustment made 180 NBI-PS-51B 1/4/01 6.1LLS.301 Barksdale B2T-M12SS AL 887 888 psig Adjustment made 181 NBI-PS-51B 10/12/00 6.1LLS.301 Barksdale B2T-M12SS AF 887 882 psig

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Input Data Page 6 of 33 Seq AF AL ID Tag ID Date Procedure MakelModel AF AL Setpt Data Units Comments 182 NBI-PS-51B 10/12/00 6.1LLS.301 Barksdale B2T-M-2SS AL 887 882 psil 183 NBI-PS-51B 71/20/00 6.1LLS.301 Barksdale B2T-M12SS AF 887 883 Psig 184 NBI-PS-51B 7/20/00 6.1LLS.301 Barksdale B2T-M12SS AL 887 883 psig 185 NBI-PS-51 B 4/26/00 6.1LLS.301 Barksdale B2T-M12SS AF 887 880 psig Adjustment made 186 NBI-PS-51 B 4/26/00 6.1LLS.301 Barksdale B2T-M12SS AL 887 889 psig Adjustment made 187 NBI-PS-51B 263/00 6.1LLS.301 Barksdale B2T-M12SS AF 887 874 psig Adjustment made 188 NBI-PS-51B 2/3/00 6.1LLS.301 Barksdale B2T-M12SS AL 887 889 psig Adjustment made 189 NBI-PS-51B 11/10/99 6.1LLS.301 Barksdale B2T-M12SS AF 887 886 psig 190 NBI-PS-51B 11/10/99 6.1LLS.301 Barksdale B2T-M12SS AL 887 886 psig 191 NBI-PS-51B 101/14/99 6.1LLS.301 Barksdale B2T-M12SS AF 887 890 jsig 192 NBI-PS-51B 10/14/99 6.1LLS.301 Barksdale B2T-M12SS AL 887 890 psig 193 NBI-PS-51B 9/15/99 6.1LLS.301 Barksdale B2T-M12SS AF 887 888 psig 194 NBI-PS-51B 9/15/99 6.1LLS.301 Barksdale B2T-M12SS AL 887 888 psi _

195 NBI-PS-51B 8/18/99 6.1LLS.301 Barksdale B2T-M12SS AL 887 890 psig 196 NBI-PS-51B 8/18/99 6.1LLS.301 Barksdale B2T-M12SS AL 887 890 psig 197 NBI-PS-51B 7/21/99 6.1LLS.301 Barksdale B2T-M12SS AF 887 892 psig 198 NBI-PS-51 B 7/21/99 6.1LLS.301 Barksdale B2T-M12SS AL 887 892 psi _

199 NBI-PS-51B 6/23/99 6.1LLS.301 Barksdale B2T-M12SS AF 887 891 psig 200 NBI-PS-51B 6/23/99 6.1LLS.301 Barksdale B2T-M12SS AL 887 891 Psig 201 NBI-PS-51 B 5/26/99 6.1 LLS.301 Barksdale B2T-M12SS AF 887 890 psig 202 NBI-PS-51B 5/26/99 6.1LLS.301 Barksdale B2T-M12SS AL 887 890 Psi_

203 NBI-PS-51B 4/28/99 6.1LLS.301 Barksdale B2T-M12SS AF 887 886 psig 204 NBI-PS-51 B 4/28/99 6.1LLS.301 Barksdale B2T-M12SS AL 887 886 psi _

205 NBI-PS-51B 4/1/99 6.1LLS.301 Barksdale B2T-M12SS AL 887 883 psi _

206 NBI-PS-51B 4/1/99 6.1LLS.301 Barksdale B2T-M12SS AL 887 883 psi _

207 NBI-PS-51 B 3/13/99 6.1LLS.301 Barksdale B2T-M12SS AF 887 888 psig 208 NBI-PS-51B 3/3/99 6.1LLS.301 Barksdale B2T-M12SS AL 887 888 psig 209 NBI-PS-51C 12/11/09 6.2LLS.301 Barksdale B2T-M12SS AF 1037 1034 psig 210 NBI-PS-51C 12/11/09 6.2LLS.301 Barksdale B2T-M12SS AL 1037 1034 psi1l 211 NBI-PS-51C 9/10/09 6.2LLS.301 Barksdale B2T-M12SS AF 1037 1038.7 psig 212 NBI-PS-51C 9/10/09 6.2LLS.301 Barksdale B2T-M12SS AL 1037 1038.7 psig 213 NBI-PS-51C 6/12/09 6.2LLS.301 Barksdale B2T-M12SS AF 1037 1043,8 psig Adjustment made 214 NBI-PS-51C 6/12/09 6.2LLS.301 Barksdale B2T-M12SS AL 1037 1036 psig Adjustment made 215 NBI-PS-51C 3/12/09 6.2LLS.301 Barksdale B2T-M12SS AF 1037 1030 psi. Adjustment made 216 NBI-PS-51C 3/12/09 6.2LLS.301 Barksdale B2T-M12SS AL 1037 1038.7 psi Adjustment made 217 NBI-PS-51C 12/9/08 6.2LLS.301 Barksdale B2T-M12SS AF 1037 1032.5 psi_

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Input Data Page 7 of 33 Seq AFN AL ID Tag ID Date Procedure Make/Model AF AL Setpt Data Units Comments 218 NBI-PS-51C 1-2/9/08 6.2LLS301 Barksdale B2T-M12SS AL 1037 1032.5 psig 219 NBI-PS-51C 9/19/08 6.2LLS.301 Barksdale B2T-M12SS AF 1037 1037.5 psig 220 NBI-PS-51C 9/19/08 6.2LLS.301 Barksdale B2T-M12SS AL 1037 1037.5 psig 221 NBI-PS-51C 6/12/08 6.2LLS.301 Barksdale B2T-M12SS AF 1037 1037.3 psig 222 NBI-PS-51C 6/12/08 6.2LLS.301 Barksdale B2T-M12SS AL 1037 1037.3 psig 223 NBI-PS-51C 5/6/08 6.2LLS.301 Barksdale B2T-M12SS AF 1037 1034.1 psig 224 NBI-PS-51C 5/6/08 6.2LLS.301 Barksdale B2T-M12SS AL 1037 1034.1 psi__

225 NBI-PS-51C 3/12/08 6.2LLS.301 Barksdale B2T-M12SS AF 1037 1033 psig 226 NBI-PS-51C 3/12/08 6.2LLS.301 Barksdale B2T-M12SS AL 1037 1033 psig 227 NBI-PS-51C 12/11/07 6.2LLS.301 Barksdale B2T-M12SS AF 1037 1034.5 psig 228 NBI-PS-51C 12/11/07 6.2LLS.301 Barksdale B2T-M12SS AL 1037 1034.5 psig

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 AF-AL Data Page 8 of 33 AFIAL DATA CAL INTERVAL = Cumulati CUMULATIVE CUMULATIVE S". CAL DATE AFIAL (Current Previous Date Date)- vDrift e

Interval Seq. DRIFT I INTERVAL=

ID Make/Model Number Tag ID mm/dd/yy Status psi Days Months psi Days ID Tag Number psi Days Months 1 Barksdale B2T-M12SS NBI-PS-51A 11/11/09 AF 1022 104 3.4 -4.7 104 1 NBI-PS-51A -4.7 104 3.4 2 Barksdale B2T-M12SS NBI-PS-51A 11/11/09 AL 1022 3 NBI-PS-51A 5.4 450 14.8 3 Barksdale B2T-M12SS NBI-PS-51A 07/30/09 AF 1034.2 90 3.0 5.4 450 13 NBI-PS-51A 1.8 534 17.6 4 Barksdale B2T-MI2SS NBI-PS-51A 07/30/09 AL 1026.7 25 NBI-PS-51A -0.7 549 18.0 5 Barksdale B2T-M12SS NBI-PS-51A 05/01/09 AF 1030 92 3.0 1.0 360 37 NBI-PS-51A 0.7 503 16.5 6 Barksdale B2T-M12SS NBI-PS-51A 05/01/09 AL 1030 49 NBI-PS-51A -2.8 504 16.6 7 Barksdale B2T-M12SS NBI-PS-51A 01/29/09 AF 1025.9 94 3.1 -3.1 268 61 NBI-PS-51A 3.8 505 16.6 8 Barksdale B2T-M12SS NBI-PS-51A 01/29/09 AL 1025.9 73 NBI-PS-51A -2.0 561 18.4 9 Barksdale B2T-M12SS NBI-PS-51A 10/27/08 AF 1029.9 89 2.9 0.9 174 89 NBI-PS-51A 3.0 196 6.4 10 Barksdale B2T-M12SS NBI-PS-51A 10/27/08 AL 1029.9 105 NBI-PS-51B -4.6 104 3.4 11 Barksdale B2T-M12SS NBI-PS-51A 07/30/08 AF 1031 85 2.8 2.0 85 107 NBI-PS-51B 4.1 182 6.0 12 Barksdale B2T-M12SS NBI-PS-51A 07/30/08 AL 1031 111 NBI-PS-51B -9.0 364 12.0 13 Barksdale B2T-M12SS NBI-PS-51A 05/06/08 AF 1028.8 27 0.9 1.8 534 121 NBI-PS-51B -7.0 182 6.0 14 Barksdale B2T-M12SS NBI-PS-51A 05/06/08 AL 1028.8 125 NBI-PS-51B 9.2 546 18.0 15 Barksdale B2T-M12SS NBI-PS-51A 04109/08 AF 1029 69 2.3 2.0 507 135 NBI-PS-51B -6.2 510 16.8 16 Barksdale B2T-M12SS NBI-PS-51A 04/09/08 AL 1029 147 NBI-PS-51B 5.0 168 5.5 17 Barksdale B2T-M12SS NBI-PS-51A 01/31/08 AF 1025.5 90 3.0 -1.5 438 151 NBI-PS-51B -6.0 252 8.3 18 Barksdale B2T-M12SS NBI-PS-51A 01/31/08 AL 1025.5 157 NBI-PS-51B -6.2 57 1.9 19 Barksdale B2T-M12SS NBI-PS-51A 11/02/07 AF 1028 92 3.0 1.0 348 20 Barksdale B2T-M12SS NBI-PS-51A 11/02/07 AL 1028 171 NBI-PS-51B -2.0 337 11.1 21 Barksdale B2T-M12SS NBI-PS-51A 08/02/07 AF 1030 90 3.0 3.0 256 179 NBI-PS-51B -9.0 253 8.3 22 Barksdale B2T-M12SS NBI-PS-51A 08/02/07 AL 1030 185 NBI-PS-51B -9.0 83 2.7 23 Barksdale B2T-M12SS NBI-PS-51A 05/04/07 AF 1029 166 5.5 2.0 166 187 NBI-PS-51B -14.0 337 11.1 24 Barksdale B2T-M12SS NBI-PS-51A 05/04/07 AL 1029 209 NBI-PS-51C -2.0 182 6.0 25 Barksdale B2T-M12SS NBI-PS-51A 11/19/06 AF 1027 108 3.5 -0.7 549 213 NBI-PS-51C 5.1 92 3.0 26 Barksdale B2T-M12SS NBI-PS-51A 11/19/06 AL 1027 215 NBI-PS-51C -8.0 546 18.0 27 Barksdale B2T-M12SS NBI-PS-51A 08/03/06 AF 1031 90 3.0 3.3 441 229 NBI-PS-51C 6.0 546 18.0 28 Barksdale B2T-M12SS NBI-PS-51A 08/03/06 AL 1031 241 NBI-PS-51C -8.0 532 17.5 29 Barksdale B2T-M12SS NBI-PS-51A 05/05/06 AF 1028 92 3.0 0.3 351 255 NBI-PS-51C 2.2 322 10.6 30 Barksdale B2T-M12SS NBI-PS-51A 05/05/06 AL 1028 263 NBI-PS-51C -5.0 181 6.0 31 Barksdale B2T-M12SS NBI-PS-51A 02/02/06 AF 1023 91 3.0 -4.7 259 267 NBI-PS-51C -7.0 492 16.2 32 Barksdale B2T-M12SS NBI-PS-51A 02/02/06 AL 1023 279 NBI-PS-51C -1.0 349 11.5 33 Barksdale B2T-M12SS NBI-PS-51A 11/03/05 AF 1025.6 91 3.0 -2.1 168 287 NBI-PS-51C -5.0 250 8.2 34 Barksdale B2T-M12SS NBI-PS-51A 11/03/05 AL 1025.6 293 NBI-PS-51C -9.0 170 5.6 35 Barksdale B2T-M12SS NBI-PS-51A 08104/05 AF 1029 77 2.5 1.3 77 297 NBI-PS-51C -9.0 281 9.2 36 Barksdale B2T-MI2SS NBI-PS-51A 08/04/05 AL 1029 317 NBI-PS-51D -5.3 547 18.0 37 Barksdale B2T-M12SS NBI-PS-51A 05/19/05 AF 1027.7 83 2.7 0.7 503 329 NBI-PS-51D 6.3 92 3.0

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 AF-AL Data Page 9 of 33 AFIAL DATA CALINTERVAL Cumulati Cumulat CUMULATIVE CUMULATIVE Seq. CAL DATE AFIAL VALUE (Current Date - ye Driftt ve y Seq.

Se.DRIFT INTERVAL =

Previous Date) Interval ID Make/Model Number Tag ID mmldd/yy Status psi Days Months psi Days ID Tag Number psi Days Months 38 Barksdale B2T-M12SS NBI-PS-51A 05/19/05 AL 1027,7 333 NBI-PS-51D -8.8 181 6.0 39 Barksdale B2T-M12SS NBI-PS-51A 02/25/05 AF 1027.5 84 2.8 0.5 420 337 NBI-PS-51D 5.4 185 6.1 40 Barksdale B2T-M12SS NBI-PS-51A 02/25/05 AL 1027.5 341 NBI-PS-51D -8.0 451 14.8 41 Barksdale B2T-MI2SS NBI-PS-51A 12/03104 AF 1025 84 2.8 -2.0 336 351 NBt-PS-51D -6.0 359 11.8 42 Barksdale B2T-M12SS NBI-PS-51A 12/03/04 AL 1025 361 NBI-PS-51D -6.7 166 5.5 43 Barksdale B2T-M12SS NBI-PS-51A 09/10/04 AF 1028 84 2.8 1.0 252 365 NBI-PS-51D 5.0 84 2.8 44 Barksdale B2T-M12SS NBI-PS-51A 09/10/04 AL 1028 367 NBI-PS-51D -7.0 506 16.6 45 Barksdale B2T-M12SS NBI-PS-51A 06/18/04 AF 1030 84 2.8 3.0 168 379 NBI-PS-51D -7.0 503 16.5 46 Barksdale B2T-M12SS NBI-PS-51A 06/18/04 AL 1030 391 NBI-PS-51D 1.0 168 5.5 47 Barksdale B2T-M12SS NBI-PS-51A 03/26/04 AF 1024 84 2.8 -3.0 84 395 NBI-PS-51D -7.0 420 13.8 48 Barksdale B2T-M12SS NBI-PS-51A 03/26/04 AL 1024 405 NBI-PS-51D -6.0 84 2.8 49 Barksdale B2T-M12SS NBI-PS-51A 01/02/04 AF 1027 84 2.8 -2.8 504 409 NBI-PS-51D -6.0 113 3.7 50 Barksdale B2T-M12SS NBI-PS-51A 01/02/04 AL 1027 417 NBI-PS-51D 4.0 84 2.8 51 Barksdale B2T-M12SS NBI-PS-51A 1 10/10/03 AF 1026 84 2.8 -3.8 420 52 Barksdale B2T-MI2SS NBI-PS-51A 10/10/03 AL 1026 53 Barksdale B2T-M12SS NBI-PS-51A 07/18/03 AF 1026 57 1.9 -3.8 336 54 Barksdale B2T-M12SS NBI-PS-51A 07/18/03 AL 1026 55 Barksdale B2T-M1 2SS NBI-PS-51A 05/22/03 AF 1027.7 111 3.6 -2.1 279 56 Barksdale B2T-M12SS NBI-PS-51A 05/22/03 AL 1027.7 57 Barksdale B2T-M12SS NBI-PS-51A 01/31/03 AF 1024 84 2.8 -5.8 168 58 Barksdale B2T-M12SS NBI-PS-51A 01/31/03 AL 1024 59 Barksdale B2T-M12SS NBI-PS-51A 11/08/02 AF 1025 84 2.8 -4.8 84 60 Barksdale B2T-MI2SS NBI-PS-51A 11/08/02 AL 1025 61 Barksdale B2T-M12SS NBI-PS-51A 08/16/02 AF 1029.8 86 2.8 3.8 505 62 Barksdale B2T-M12SS NBI-PS-51A 08/16/02 AL 1029.8 63 Barksdale B2T-M12SS NBI-PS-51A 05/22/02 AF 1025 83 2.7 -1.0 419 64 Barksdale B2T-M12SS NBI-PS-51A 05/22/02 AL 1025 65 Barksdale B2T-M12SS NBI-PS-51A 02/28/02 AF 1022 83 2.7 -4.0 336 66 Barksdale B2T-M12SS NBI-PS-51A 02/28/02 AL 1022 67 Barksdale B2T-M12SS NBI-PS-51A 12/07/01 AF 1028 85 2.8 2.0 253 68 Barksdale B2T-M12SS NBI-PS-51A 12107101 AL 1028 69 Barksdale B2T-M12SS NBI-PS-51A 09/13/01 AF 1029 84 2.8 3.0 168 70 Barksdale B2T-M12SS NBI-PS-51A 09/13/01 AL 1029 71 Barksdale B2T-M12SS NBI-PS-51A 06/21/01 AF 1030 84 2.8 4.0 84 72 Barksdale B2T-M12SS NBI-PS-51A 06/21/01 AL 1030 73 Barksdale B2T-M12SS NBI-PS-51A 03/29/01 AF 1026 84 2.8 -2.0 561 74 Barksdale B2T-M12SS NBI-PS-51A 03/29/01 AL 1026 1

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 AF-AL Data Page 10 of 33 AFIAL DATA CAL INTERVAL = Cumulati CUMULATIVE CUMULATIVE Seq. CAL DATE AF/AL VALUE (Current Date - Ce Drift ve Seq.

Previous Date) Interval I

ID Make/Model Number Tag ID mm/dd/yy Status psi Days Months psi Days ID Tag Number psi Days j Months 75 Barksdale B2T-M12SS NBI-PS-51A 1 01/04/01 1 AF 1024 84 2.8 -4.0 477 76 Barksdale B2T-M12SS NBI-PS-51A 01/04/01 AL 1024 77 Barksdale B2T-M12SS NBI-PS-51A 10/12/00 AF 1027 84 2.8 -1.0 393 78 Barksdale B2T-M12SS NBI-PS-51A 10/12/00 AL 1027 79 Barksdale B2T-M12SS NBI-PS-51A 07/20/00 AF 1028 85 2.8 0.0 309 80 Barksdale B2T-M12SS NBI-PS-51A 07/20/00 AL 1028 81 Barksdale B2T-M12SS NBI-PS-51A 04/26/00 AF 1029 83 2.7 1.0 224 82 Barksdale B2T-M12SS NBI-PS-51A 04/26/00 AL 1029 83 Barksdale B2T-M12SS NBI-PS-51A 02/03/00 AF 1024 85 2.8 -4.0 141 84 Barksdale B2T-M12SS NBI-PS-51A 02/03/00 AL 1024 85 Barksdale B2T-M12SS NBI-PS-51A 11/10199 AF 1024 27 0.9 -4.0 56 86 Barksdale B2T-M12SS NBI-PS-51A 11/10/99 AL 1024 87 Barksdale B2T-M12SS NBI-PS-51A 10/14/99 AF 1030 29 1.0 2.0 29 88 Barksdale B2T-M12SS NBI-PS-51A 10/14/99 AL 1030 89 Barksdale B2T-M12SS NBI-PS-51A 09/15/99 AF 1028 28 0.9 3.0 196 90 Barksdale B2T-M12SS NBI-PS-51A 09/15/99 AL 1028 91 Barksdale B2T-M12SS NBI-PS-51A 08/18/99 AF 1030 28 0.9 5.0 168 92 Barksdale B2T-M12SS NBI-PS-51A 08/18/99 AL 1030 93 Barksdale B2T-M12SS NBI-PS-51A 07/21/99 AF 1030 28 0.9 5.0 140 94 Barksdale B2T-M12SS NBI-PS-51A 07/21/99 AL 1030 95 Barksdale B2T-M12SS NBI-PS-51A 06/23/99 AF 1032 28 0.9 7.0 112 96 Barksdale B2T-M12SS NBI-PS-51A 06/23/99 AL 1032 97 Barksdale B2T-M12SS NBI-PS-51A 05/26/99 AF 1027 28 0.9 2.0 84 98 Barksdale B2T-M12SS NBI-PS-51A 05126/99 AL 1027 99 Barksdale B2T-M12SS NBI-PS-51A 04/28/99 AF 1030 27 0.9 5.0 56 100 Barksdale B2T-M12SS NBI-PS-51A 04/28/99 AL 1030 101 Barksdale B2T-M12SS NBI-PS-51A 04/01/99 AF 1028 29 1.0 3.0 29 102 Barksdale B2T-M12SS NBI-PS-51A 04/01/99 AL 1028 103 Barksdale B2T-M12SS NBI-PS-51A 03/03/99 AF 1025 104 Barksdale B2T-M12SS NBI-PS-51A 03/03/99 AL 1025 105 Barksdale B2T-M12SS NBI-PS-51B 11/11/09 AF 883 104 3.4 -4.6 104 106 Barksdale B2T-M12SS NBI-PS-51B 11/11/09 AL 883 107 Barksdale B2T-M12SS NBI-PS-51B 07/30/09 AF 893.1 90 3.0 4.1 182 108 Barksdale B2T-M12SS NBI-PS-51B 07/30/09 AL 887,6 109 Barksdale B2T-M12SS NBI-PS-51B 05/01/09 AF 890 92 3.0 1.0 92 110 Barksdale B2T-M12SS NBI-PS-51B 05/01/09 AL 890 111 Barksdale B2T-M12SS NBI-PS-51B 01/29109 AF 877 94 3.1 -9.0 364

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 AF-AL Data Page 11 of 33 AFIAL DATA CALINTERVAL= Cumulati ulati CUMULATIVE CUMULATIVE Seq CAL DATE AF/AL VALUE (Current Date ye Drift IntervalI ve Seq.

Previous Date) DRIFT INTERVAL=

ID Make/Model Number Tag ID mm/dd/yy Status psi Days Months psi Days ID Tag Number psi Days Months I - - - - - -

112 Barksdale B2T-M12SS NBI-PS-51B 1 01/29/09 AL 889 113 Barksdale B2T-M12SS NBI-PS-51B 10/27/08 AF 887 89 2.9 1.0 270 114 Barksdale B2T-M12SS NBI-PS-51B 10/27/08 AL 887 115 Barksdale B2T-M12SS NBI-PS-51B 07/30/08 AF 884 85 2.8 -2.0 181 116 Barksdale B2T-M12SS NBI-PS-51B 07/30/08 AL 884 117 Barksdale B2T-M12SS NBI-PS-51B 05/06/08 AF 882 27 0.9 -4.0 96 118 Barksdale B2T-M12SS NBI-PS-51B 05/06/08 AL 882 119 Barksdale B2T-M12SS NBI-PS-51B 04/09108 AF 888 69 2.3 2.0 69 120 Barksdale B2T-M12SS NBI-PS-51B 04/09/08 AL 888 121 Barksdale B2T-M12SS NBI-PS-51B 01/31/08 AF 881 90 3.0 -7.0 182 122 Barksdale B2T-M12SS NBI-PS-51B 01/31/08 AL 886 123 Barksdale B2T-M12SS NBI-PS-51B 11/02/07 AF 885 92 3.0 -310 92 124 Barksdale B2T-M12SS NBI-PS-51B 11/02/07 AL 885 125 Barksdale B2T-M12SS NBI-PS-51B 08/02/07 AF 895 90 3.0 9.2 546 126 Barksdale B2T-M12SS NBI-PS-51B 08/02/07 AL 888 127 Barksdale B2T-M12SS NBI-PS-51B 05/04/07 AF 891.4 166 5.5 5.6 456 128 Barksdale B2T-M12SS NBI-PS-51 B 05/04/07 AL 891.4 129 Barksdale B2T-M12SS NBI-PS-51B 11/19/06 AF 885 108 3.5 -0.8 290 130 Barksdale B2T-M12SS NBI-PS-51B 11/19/06 AL 885 131 Barksdale B2T-M12SS NBI-PS-51B 08/03/06 AF 888.5 90 3.0 2.7 182 132 Barksdale B2T-M12SS NBI-PS-51 B 08/03/06 AL 888.5 133 Barksdale B2T-M12SS NBI-PS-51 B 05/05/06 AF 885 92 3.0 -0.8 92 134 Barksdale B2T-M12SS NBI-PS-51B 05/05/06 AL 885 135 Barksdale B2T-M12SS NBI-PS-51B 02/02/06 AF 885.8 91 3.0 -6.2 510 136 Barksdale B2T-M12SS NBI-PS-51 B 02/02/06 AL 885.8 137 Barksdale B2T-M12SS NBI-PS-51B 11/03/05 AF 887.3 91 3.0 -4.7 419 138 Barksdale B2T-M12SS NBI-PS-51B 11/03/05 AL 887.3 139 Barksdale B2T-M12SS NBI-PS-51B 08/04/05 AF 890.5 77 2.5 -1.5 328 140 Barksdale B2T-M12SS NBI-PS-51 B 08104/05 AL 890.5 141 Barksdale B2T-M12SS NBI-PS-51B 05/19/05 AF 889.3 83 2.7 -2.7 251 142 Barksdale B2T-M12SS NBI-PS-51B 05/19/05 AL 889.3 143 Barksdale B2T-M12SS NBI-PS-51B 02/25/05 AF 888 84 2.8 -4.0 168 144 Barksdale B2T-M12SS NBI-PS-51 B 02/25/05 AL 888 145 Barksdale B2T-M12SS NBI-PS-51B 12/03/04 AF 887 84 2.8 -5.0 84 146 Barksdale B2T-M12SS NBI-PS-51B 12/03/04 AL 887 147 Barksdale B2T-M12SS NBI-PS-51B 09/10/04 AF 892 84 2.8 5.0 168 148 Barksdale B2T-M12SS NBI-PS-51B 09/10/04 AL 892 1 1 1

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 AF-AL Data Page 12 of 33 AFIAL DATA CALINTERVAL Cumulati Cumulati CUMULATIVE CUMULATIVE Seq. CAL DATE AFIAL V (Current Date- ve Seq.

VALUE Previous Date) ve interval DRIFT I-INTERVAL ID Make/Model Number Tag ID mm/dd/yy Status psi Days Months psi Days ID Tag Number psi Days I Months 149 Barksdale B2T-M12SS NBI-PS-51B 1 06118/04 AF 891 84 2.8 4.0 84 150 Barksdale B2T-M12SS NBI-PS-51B 06/18/04 AL 891 151 Barksdale B2T-M12SS NBI-PS-51B 03/26/04 AF 881 84 2.8 -6.0 252 152 Barksdale B2T-M12SS NBI-PS-51B 03/26/04 AL 887 153 Barksdale B2T-M12SS NBI-PS-51B 01/02/04 AF 882 84 2.8 -5.0 168 154 Barksdale B2T-M12SS NBI-PS-51B 01/02/04 AL 882 155 Barksdale B2T-M12SS NBI-PS-51B 10/10/03 AF 885 84 2.8 -2.0 84 156 Barksdale B2T-M12SS NBI-PS-51 B 10/10/03 AL 885 157 Barksdale B2T-M12SS NBI-PS-51B 07/18/03 AF 880 57 1.9 -6.2 57 158 Barksdale B2T-M12SS NBI-PS-51B 07/18/03 AL 887 159 Barksdale B2T-M12SS NBI-PS-51B 05/22/03 AF 111 3.6 -23.0 531 160 Barksdale B2T-M12SS NBI-PS-51 B 05/22/03 AL 161 Barksdale B2T-M12SS NBI-PS-51B 01/31/03 AF 882 84 2.8 -4.0 420 162 Barksdale B2T-M12SS NBI-PS-51B 01/31/03 AL 882 163 Barksdale B2T-M12SS NBI-PS-51B 11/08/02 AF 882 84 2.8 -4.0 336 164 Barksdale B2T-M12SS NBI-PS-51B 11/08/02 AL 882 165 Barksdale B2T-M12SS NBI-PS-51B 08/16/02 AF 886 86 2.8 0.0 252 166 Barksdale B2T-M12SS NBI-PS-51B 08/16/02 AL 886 167 Barksdale B2T-M12SS NBI-PS-51B 05/22/02 AF 883 83 2.7 -3.0 166 168 Barksdale B2T-M12SS NBI-PS-51 B 05/22/02 AL 883 169 Barksdale B2T-M12SS NBI-PS-51B 02/28/02 AF 882 83 2.7 -4.0 83 170 Barksdale B2T-M12SS NBI-PS-51B 02/28/02 AL 882 171 Barksdale B2T-M12SS NBI-PS-51B 12/07/01 AF 886 85 2.8 -2.0 337 172 Barksdale B2T-M12SS NBI-PS-51B 12/07/01 AL 886 173 Barksdale B2T-M12SS NBI-PS-51B 09/13/01 AF 888 84 2.8 0.0 252 174 Barksdale B2T-M12SS NBI-PS-51B 09/13/01 AL 888 175 Barksdale B2T-M12SS NBI-PS-51B 06/21/01 AF 888 84 2.8 0.0 168 176 Barksdale B2T-M12SS NBI-PS-51B 06/21/01 AL 888 177 Barksdale B2T-M12SS NBI-PS-51B 03/29/01 AF 884 84 2.8 -4.0 84 178 Barksdale B2T-M12SS NBI-PS-51B 03/29/01 AL 884 179 Barksdale B2T-M12SS NBI-PS-51B 01/04/01 AF 880 84 2.8 -9.0 253 180 Barksdale B2T-M12SS NBI-PS-51B 01/04/01 AL 888 181 Barksdale B2T-M12SS NBI-PS-51B 10/12/00 AF 882 84 2.8 -7.0 169 182 Barksdale B2T-M12SS NBI-PS-51B 10/12/00 AL 882 183 Barksdale B2T-M12SS NBI-PS-51B 07/20/00 AF 883 85 2.8 -6.0 85 184 Barksdale B2T-M12SS NBI-PS-51 B 07/20/00 AL 883 185 Barksdale B2T-M12SS NBI-PS-51B 04/26/00 AF 880 83 2.7 -9.0 83

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 AF-AL Data Page 13 of 33 Seq.

ID Make/Model Number Tag ID jVALUE CAL DATE mmlddlyy AFIAL Status AFAL AL(Current psi CAL INTERVAL =

Previous (Cvn Days Date -

Date) a IMonths e

psi Cumulat vDft e Interval Drumlaif Days Seq.

ID Tag Number CUMULATIVE DRIFT psi CUMULATIVE INTERVAL =

Days T Months I -

186 Barksdale B2T-M12SS NBI-PS-51B 1 04/26/00 AL 889 187 Barksdale B2T-M12SS NBI-PS-51B 02/03/00 AF 874 85 2.8 -14.0 337 188 Barksdale B2T-M12SS NBI-PS-51B 02/03/00 AL 889 189 Barksdale B2T-M12SS NBI-PS-51B 11/10/99 AF 886 27 0.9 -2.0 252 190 Barksdale B2T-M12SS NBI-PS-51B 11/10/99 AL 886 191 Barksdale B2T-M12SS NBI-PS-51B 10/14/99 AF 890 29 1.0 2.0 225 192 Barksdale B2T-M12SS NBI-PS-51B 10/14/99 AL 890 193 Barksdale B2T-M12SS NBI-PS-51B 09/15/99 AF 888 28 0.9 0.0 196 194 Barksdale B2T-M12SS NBI-PS-51 B 09/15/99 AL 888 195 Barksdale B2T-M12SS NBI-PS-51B 08/18/99 AF 890 28 0.9 2.0 168 196 Barksdale B2T-M12SS NBI-PS-51B 08/18/99 AL 890 197 Barksdale B2T-M12SS NBI-PS-51B 07/21/99 AF 892 28 0.9 4.0 140 198 Barksdale B2T-M12SS NBI-PS-51B 07/21/99 AL 892 199 Barksdale B2T-M12SS NBI-PS-51B 06/23/99 AF 891 28 0.9 3.0 112 200 Barksdale B2T-M12SS NBI-PS-51 B 06/23/99 AL 891 201 Barksdale B2T-M12SS NBI-PS-51B 05/26/99 AF 890 28 0.9 2.0 84 202 Barksdale B2T-M12SS NBI-PS-51 B 05/26/99 AL 890 203 Barksdale B2T-M12SS NBI-PS-51B 04/28/99 AF 886 27 0.9 -2.0 56 204 Barksdale B2T-M12SS NBI-PS-51B 04/28/99 AL 886 205 Barksdale B2T-M12SS NBI-PS-51B 04/01/99 AF 883 29 1.0 -5.0 29 206 Barksdale B2T-M12SS NBI-PS-51 B 04/01/99 AL 883 207 Barksdale B2T-M12SS NBI-PS-51B 03/03/99 AF 888 208 Barksdale B2T-M12SS NBI-PS-51B 03/03/99 AL 888 209 Barksdale B2T-M12SS NBI-PS-51C 12/11/09 AF 1034 92 3.0 -2.0 182 210 Barksdale B2T-M12SS NBI-PS-51C 12/11/09 AL 1034 211 Barksdale B2T-M12SS NBI-PS-51C 09/10/09 AF 1038.7 90 3.0 2.7 90 212 Barksdale B2T-M12SS NBI-PS-51C 09/10/09 AL 1038.7 213 Barksdale B2T-M12SS NBI-PS-51C 06/12/09 AF 1043.8 92 3.0 5.1 92 214 Barksdale B2T-M12SS NBI-PS-51C 06/12/09 AL 1036 215 Barksdale B2T-M12SS NBI-PS-51C 03/12/09 AF 1030 93 3.1 -8.0 546 216 Barksdale B2T-M12SS NBI-PS-51C 03/12/09 AL 1038.7 217 Barksdale B2T-M12SS NBI-PS-51C 12/09/08 AF 1032.5 81 2.7 -5.5 453 218 Barksdale B2T-M12SS NBI-PS-51C 12/09/08 AL 1032.5 219 Barksdale B2T-M12SS NBI-PS-51C 09/19/08 AF 1037.5 99 3.3 -0.5 372 220 Barksdale B2T-M12SS NBI-PS-51C 09/19/08 AL 1037.5 221 Barksdale B2T-M12SS NBI-PS-51C 06/12/08 AF 1037.3 37 1.2 -0.7 273 222 Barksdale B2T-M12SS NBI-PS-51C 06/12/08 AL 1037.3

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 AF-AL Data Page 14 of 33 AFA AA CAL INTERVAL = !Cumnulati Seq. CAL DATE AFIAL AFIAL V LDATA E Currnt (Current Date - Cumulati veDit ve Seq Seq.DRFIN CUMULATIVE CUMULATIVE VALUE ye Drift yeDRIFT E V L=

INTERVAL Previous Date) Interval ID MakelModel Number Tag ID mmlddlyy Status psi Days Months psi Days ID Tag Number psi Days Months 223 Barksdale B2T-M12SS I NBI-PS-51C 1 05/06/08 1 AF 1034.1 55 1.8 -3.9 236 224 Barksdale B2T-M12SS NBI-PS-51C 05/06/08 AL 1034.1 225 Barksdale B2T-M12SS NBI-PS-51C 03/12/08 AF 1033 92 3.0 -5.0 181 226 Barksdale B2T-M12SS NBI-PS-51C 03/12/08 AL 1033 227 Barksdale B2T-M12SS NBI-PS-51C 12/11/07 AF 1034.5 89 2.9 -3.5 89 228 Barksdale B2T-M12SS NBI-PS-51C 12/11/07 AL 1034.5 229 Barksdale B2T-M12SS NBI-PS-51C 09/13/07 AF 1038 90 3.0 6.0 546 230 Barksdale B2T-M12SS NBI-PS-51C 09/13/07 AL 1038 231 Barksdale B2T-M12SS NBI-PS-51C 06/15/07 AF 1036.6 95 3.1 4.6 456 232 Barksdale B2T-M12SS NBI-PS-51C 06/15/07 AL 1036.6 233 Barksdale B2T-M12SS NBI-PS-51C 03/12/07 AF 1033 88 2.9 1.0 361 234 Barksdale B2T-M12SS NBI-PS-51C 03/12/07 AL 1033 235 Barksdale B2T-M12SS NBI-PS-51C 12/14/06 AF 1036.4 91 3.0 4.4 273 236 Barksdale B2T-M12SS NBI-PS-51C 12/14/06 AL 1036.4 237 Barksdale B2T-M12SS NBI-PS-51C 09/14/06 AF 1042 90 3.0 10.0 182 238 Barksdale B2T-M12SS NBI-PS-51C 09/14/06 AL 1042 239 Barksdale B2T-M12SS NBI-PS-51C 06/16/06 AF 1038.2 92 3.0 6.2 92 240 Barksdale B2T-M12SS NBI-PS-51C 06/16/06 AL 1038.2 241 Barksdale B2T-M12SS NBI-PS-51C 03/16/06 AF 1032 90 3.0 -8.0 532 242 Barksdale B2T-M12SS NBI-PS-51C 03/16/06 AL 1032 243 Barksdale B2T-M12SS NBI-PS-51C 12/16/05 AF 1035 95 3.1 -5.0 442 244 Barksdale B2T-M12SS NBI-PS-51C 12/16/05 AL 1035 245 Barksdale B2T-M12SS NBI-PS-51C 09/12/05 AF 1040 95 3.1 0.0 347 246 Barksdale B2T-M12SS NBI-PS-51C 09/12/05 AL 1040 247 Barksdale B2T-M12SS NBI-PS-51C 06/09/05 AF 1036 84 2.8 -4.0 252 248 Barksdale B2T-M12SS NBI-PS-51C 06/09/05 AL 1036 249 Barksdale B2T-M12SS NBI-PS-51C 03/17/05 AF 1034 40 1.3 -6.0 168 250 Barksdale B2T-M12SS NBI-PS-51C 03/17/05 AL 1034 251 Barksdale B2T-M12SS NBI-PS-51C 02/05/05 AF 1034 45 1.5 -6.0 128 252 Barksdale B2T-M12SS NBI-PS-51C 02/05/05 AL 1034 253 Barksdale B2T-M12SS NBI-PS-51C 12/22/04 AF 1035 83 2.7 -5.0 83 254 Barksdale B2T-M12SS NBI-PS-51C 12/22/04 AL 1035 255 Barksdale B2T-M12SS NBI-PS-51C 09/30/04 AF 1040 83 2.7 2.2 322 256 Barksdale B2T-M12SS NBI-PS-51C 09130/04 AL 1040 257 Barksdale B2T-M12SS NBI-PS-51C 07/09/04 AF 1040.2 84 2.8 2.4 239 258 Barksdale B2T-M12SS NBI-PS-51C 07/09/04 AL 1040.2 259 Barksdale B2T-M12SS NBI-PS-51C 04116/04 AF 1035 84 2.8 -2.8 155 260 Barksdale B2T-M12SS NBI-PS-51C 04/16/04 AL 1035 261 Barksdale B2T-M12SS NBI-PS-51C 01/23/04 AF 1035 71 2.3 -2.8 71

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 AF-AL Data Page 15 of 33 Se CL AT A/A AF/AL CurenINERA =

CALCumulati N DateL - uult Cumulati Seq. CAL DATE AF/AL V LDATAE VAeU(Current veDit ve Seq.DRFIN SeeriftDRIFT CUMULATIVE CUMULATIVE INTERVAL=

E V L Previous Date) Interval I ID Make/Model Number Tag ID mm/ddlyy Status psi Days Months psi Days ID Tag Number psi Days Months 262 1 Barksdale B2T-M12SS NBI-PS-51C 1 01/23/04 AL 1035 263 Barksdale B2T-M12SS NBI-PS-51C 11/13/03 AF 1031 97 3.2 -5.0 181 264 Barksdale B2T-M12SS NBI-PS-51C 11/13/03 AL 1037.8 265 Barksdale B2T-M12SS NBI-PS-51C 08/08/03 AF 1034.5 84 2.8 -1.5 84 266 Barksdale B2T-M12SS NBI-PS-51C 08108/03 AL 1034.5 267 Barksdale B2T-M12SS NBI-PS-51C 05/16/03 AF 1030 84 2.8 -7.0 492 268 Barksdale B2T-M12SS NBI-PS-51C 05/16/03 AL 1036 269 Barksdale B2T-M12SS NBI-PS-51C 02/21/03 AF 1032 86 2.8 -5.0 408 270 Barksdale B2T-M12SS NBI-PS-51C 02/21/03 AL 1032 271 Barksdale B2T-M12SS NBI-PS-51C 11/27/02 AF 1034 82 2.7 -3.0 322 272 Barksdale B2T-M12SS NBI-PS-51C 11/27/02 AL 1034 273 Barksdale B2T-M12SS NBI-PS-51C 09/06102 AF 1039 84 2.8 2.0 240 274 Barksdale B2T-M12SS NBI-PS-51C 09/06/02 AL 1039 275 Barksdale B2T-M12SS NBI-PS-51C 06/14/02 AF 1036 85 2.8 -1.0 156 276 Barksdale B2T-M12SS NBI-PS-51C 06/14/02 AL 1036 277 Barksdale B2T-M12SS NBI-PS-51C 03/21/02 AF 1035 71 2.3 -2.0 71 278 Barksdale B2T-M12SS NBI-PS-51C 03/21/02 AL 1035 279 Barksdale B2T-M12SS NBI-PS-51C 01/09/02 AF 1037 97 3.2 -1.0 349 280 Barksdale B2T-M12SS NBI-PS-51C 01/09/02 AL 1037 281 Barksdale B2T-M12SS NBI-PS-51C 10/04/01 AF 1042 84 2.8 4.0 252 282 Barksdale B2T-M12SS NBI-PS-51C 10/04/01 AL 1042 283 Barksdale B2T-M12SS NBI-PS-51C 07/12/01 AF 1042 84 2.8 4.0 168 284 Barksdale B2T-M12SS NBI-PS-51C 07/12/01 AL 1042 285 Barksdale B2T-M12SS NBI-PS-51C 04/19/01 AF 1037 84 2.8 -1.0 84 286 Barksdale B2T-M12SS NBI-PS-51C 04/19/01 AL 1037 287 Barksdale B2T-M12SS NBI-PS-51C 01/25/01 AF 1030 84 2.8 -5.0 250 288 Barksdale B2T-M12SS NBI-PS-51C 01/25101 AL 1038 289 Barksdale B2T-M12SS NBI-PS-51C 11/02/00 AF 1032 84 2.8 -3.0 166 290 Barksdale B2T-M12SS NBI-PS-51C 11/02/00 AL 1032 291 Barksdale B2T-M12SS NBI-PS-51C 08/10/00 AF 1037 82 2.7 2.0 82 292 Barksdale B2T-M12SS NBI-PS-51C 08/10/00 AL 1037 293 Barksdale B2T-M12SS NBI-PS-51C 05/20/00 AF 1028 86 2.8 -9.0 170 294 Barksdale B2T-M12SS NBI-PS-51C 05/20/00 AL 1035 295 Barksdale B2T-M12SS NBI-PS-51C 02/24/00 AF 1032 84 2.8 -5.0 84 296 Barksdale B2T-M12SS NBI-PS-51C 02/24/00 AL 1032 297 Barksdale B2T-M12SS NBI-PS-51C 12/02/99 AF 1029 56 1.8 -9.0 281 298 Barksdale B2T-M12SS NBI-PS-51C 12/02/99 AL 1037 299 Barksdale B2T-M12SS NBI-PS-51C 10/07/99 AF 1035 28 0.9 -3.0 225 300 Barksdale B2T-M12SS NBI-PS-51C 10/07/99 AL 1035 301 Barksdale B2T-M12SS NBI-PS-51C 09/09/99 AF 1037 29 1.0 -1.0 197 302 Barksdale B2T-M12SS NBI-PS-51C 09/09/99 AL 1037 1 1

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 AF-AL Data Page 16 of 33 Seq.

Se. A DT CAL DATE IPrevious A/A AFIAL F/LDAACAL AFIAL V LDATA VALUE E r%

INTERVAL =

(Current Date ae -

Date)

Cumulati vveDit e Drift Cumulati ve y

IntervalI JSeq.DRFIN qDRIFT CUMULATIVE CUMULATIVE INTERVAL E V L-ID Make/Model Number I Tag ID mm/dd/yy Status

- psi Days- Iý Months

- psi Days ID Tag Number psi Days Months 303 Barksdale B2T-M12SS NBI-PS-51C 1 08/111/99 AF 1038 30 1.0 0.0 168 304 Barksdale B2T-M12SS NBI-PS-51C 08/11/99 AL 1038 305 Barksdale B2T-M12SS NBI-PS-51C 07/12/99 AF 1039 27 0.9 1.0 138 306 Barksdale B2T-M12SS NBI-PS-51C 07/12/99 AL 1039 307 Barksdale B2T-M12SS NBI-PS-51C 06/15/99 AF 1039 27 0.9 1.0 111 308 Barksdale B2T-M12SS NBI-PS-51C 06/15/99 AL 1039 309 Barksdale B2T-M12SS NBI-PS-51C 05/19/99 AF 1037 27 0.9 -1.0 84 310 Barksdale B2T-M12SS NBI-PS-51C 05/19/99 AL 1037 311 Barksdale B2T-M12SS NBI-PS-51C 04/22/99 AF 1035 29 1.0 -3.0 57 312 Barksdale B2T-M12SS NBI-PS-51C 04/22/99 AL 1035 313 Barksdale B2T-M12SS NBI-PS-51C 03/24/99 AF 1035 28 0.9 -3.0 28 314 Barksdale B2T-M12SS NBI-PS-51C 03/24/99 AL 1035 315 Barksdale B2T-M12SS NBI-PS-51C 02/24/99 AF 316 Barksdale B2T-M12SS NBI-PS-51C 02/24/99 AL 1038 317 Barksdale B2T-M12SS NBI-PS-51D 12/11/09 AF 886 92 3.0 -5.3 547 318 Barksdale B2T-M12SS NBI-PS-51D 12/11/09 AL 886 319 Barksdale B2T-M12SS NBI-PS-51D 09/10/09 AF 892 90 3.0 0.7 455 320 Barksdale B2T-M12SS NBI-PS-51 D 09/10/09 AL 892 321 Barksdale B2T-M12SS NBI-PS-51D 06/12/09 AF 891.1 92 3.0 -0.2 365 322 Barksdale B2T-M12SS NBI-PS-51D 06/12/09 AL 891.1 323 Barksdale B2T-M12SS NBI-PS-51D 03/12/09 AF 885 93 3.1 -6.3 273 324 Barksdale B2T-M12SS NBI-PS-51 D 03/12/09 AL 885 325 Barksdale B2T-M12SS NBI-PS-51D 12/09/08 AF 882.9 81 2.7 -8.4 180 326 Barksdale B2T-M12SS NBI-PS-51D 12/09/08 AL 882.9 327 Barksdale B2T-M12SS NBI-PS-51D 09119/08 AF 892 99 3.3 0.7 99 328 Barksdale B2T-M12SS NBI-PS-51 D 09/19/08 AL 892 329 Barksdale B2T-M12SS NBI-PS-51D 06/12/08 AF 891.3 37 1.2 6.3 92 330 Barksdale B2T-M12SS NBI-PS-51D 06/12/08 AL 891.3 331 Barksdale B2T-M12SS NBI-PS-51D 05/06/08 AF 887.5 55 1.8 2.5 55 332 Barksdale B2T-M12SS NBI-PS-51 D 05/06/08 AL 887.5 333 Barksdale B2T-M12SS NBI-PS-51D 03/12/08 AF 879 92 3.0 -8.8 181 334 Barksdale B2T-M12SS NBI-PS-51D 03/12/08 AL 885 335 Barksdale B2T-M12SS NBI-PS-51D 12/11/07 AF 882.2 89 2.9 -5.6 89 336 Barksdale B2T-M12SS NBI-PS-51 D 12/11/07 AL 882.2 337 Barksdale B2T-M12SS NBI-PS-51D 09/13/07 AF 894.4 90 3.0 5.4 185 338 Barksdale B2T-M12SS NBI-PS-51D 09/13/07 AL 887.8 339 Barksdale B2T-M12SS NBI-PS-51D 06/15/07 AF 891.9 95 3.1 2.9 95 340 Barksdale B2T-M12SS NBI-PS-51 D 06/15/07 AL 891.9 341 Barksdale B2T-M12SS NBI-PS-51D 03/12/07 AF 880 88 2.9 -8.0 451 342 Barksdale B2T-M12SS NBI-PS-51D 03/12/07 AL 889 1 343 Barksdale B2T-M12SS NBI-PS-51D 12/14/06 AF 882.8 91 3.0 -5.2 363

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 AF-AL Data Page 17 of 33 AFIAL DATA CALINTERVA Cumulati CUMULATIVE CUMULATIVE Seq. CAL DATE AFIAL V VALUE (Current Date - CumDrati ye Drift ve VO SeqCu.

SqDRIFT ITRA Previous Date) Interval I ID Make/Model Number Tag ID mm/dd/yy Status psi Days Months psi Days ID Tag Number psi Days IMonths 344 Barksdale B2T-M12SS NBI-PS-51D 1 12/14/06 AL 882.8 345 Barksdale B2T-M12SS NBI-PS-51D 09/14/06 AF 894 90 3.0 6.0 272 346 Barksdale B2T-M12SS NBI-PS-51D 09/14/06 AL 894 347 Barksdale B2T-M12SS NBI-PS-51D 06/16/06 AF 892 92 3.0 4.0 182 348 Barksdale B2T-M12SS NBI-PS-51 D 06/16/06 AL 892 349 Barksdale B2T-M12SS NBI-PS-51 D 03/16/06 AF 885 90 3.0 -3.0 90 350 Barksdale B2T-M12SS NBI-PS-51 D 03/16/06 AL 885 351 Barksdale B2T-M12SS NBI-PS-51D 12/16/05 AF 881 95 3.1 -6.0 359 352 Barksdale B2T-M12SS NBI-PS-51 D 12/16/05 AL 888 353 Barksdale B2T-M12SS NBI-PS-51D 09/12/05 AF 890.1 95 3.1 3.1 264 354 Barksdale B2T-M12SS NBI-PS-51 D 09/12/05 AL 890.1 355 Barksdale B2T-M12SS NBI-PS-51D 06/09/05 AF 889 84 2.8 2.0 169 356 Barksdale B2T-M12SS NBI-PS-51 D 06/09105 AL 889 357 Barksdale B2T-M12SS NBI-PS-51D 03/17/05 AF 885 40 1.3 -2.0 85 358 Barksdale B2T-M12SS NBI-PS-51D 03/17/05 AL 885 359 Barksdale B2T-M12SS NBI-PS-51D 02/05/05 AF 886 45 1.5 -1.0 45 360 Barksdale B2T-M12SS NBI-PS-51D 02/05/05 AL 886 361 Barksdale B2T-M12SS NBI-PS-51D 12/22/04 AF 880 83 2.7 -6.7 166 362 Barksdale B2T-M12SS NBI-PS-51 D 12/22/04 AL 887 363 Barksdale B2T-M12SS NBI-PS-51D 09/30/04 AF 886 83 2.7 -0.7 83 364 Barksdale B2T-M12SS NBI-PS-51D 09/30/04 AL 886 365 Barksdale B2T-M12SS NBI-PS-51D 07/09/04 AF 893 84 2.8 5.0 84 366 Barksdale B2T-M12SS NBI-PS-51D 07/09/04 AL 886.7 367 Barksdale B2T-M12SS NBI-PS-51 D 04/16/04 AF 881 84 2.8 -7.0 506 368 Barksdale B2T-M12SS NBI-PS-51 D 04/16/04 AL 888 369 Barksdale B2T-M12SS NBI-PS-51D 01/23/04 AF 882.1 71 2.3 -5.9 422 370 Barksdale B2T-M12SS NBI-PS-51D 01/23/04 AL 882.1 371 Barksdale B2T-M12SS NBI-PS-51D 11/13/03 AF 884 97 3.2 -4.0 351 372 Barksdale B2T-M12SS NBI-PS-51 D 11/13/03 AL 884 373 Barksdale B2T-M12SS NBI-PS-51 D 08/08/03 AF 887 84 2.8 -1.0 254 374 Barksdale B2T-M12SS NBI-PS-51D 08/08/03 AL 887 375 Barksdale B2T-M12SS NBI-PS-51D 05/16/03 AF 887 84 2.8 -1.0 170 376 Barksdale B2T-M12SS NBI-PS-51 D 05/16/03 AL 887 377 Barksdale B2T-M12SS NBI-PS-51 D 02/21/03 AF 886 86 2.8 -2.0 86 378 Barksdale B2T-M12SS NBI-PS-51D 02/21/03 AL 886 379 Barksdale B2T-M12SS NBI-PS-51D 11/27/02 AF 881 82 2.7 -7.0 503 380 Barksdale B2T-M12SS NBI-PS-51D 11/27/02 AL 888 381 Barksdale B2T-M12SS NBI-PS-51D 09/06/02 AF 886.2 84 2.8 -1.8 421 382 Barksdale B2T-M12SS NBI-PS-51 D 09/06/02 AL 886.2 383 Barksdale B2T-M12SS NBI-PS-51 D 06/14/02 AF 887 85 2.8 -1.0 337 384 Barksdale B2T-M12SS NBI-PS-51D 06/14/02 AL 887 1 1

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 AF-AL Data Page 18 of 33 AF/AL DATA CALINTERVAL Cumulati Cumulati CUMULATIVE CUMULATIVE Seq. CAL DATE AF/AL VALUE (Current Date - veDrift ve Seq. DRIFT INTERVAL=

Previous Date) Interval I ID Make/Model Number Tag ID mm/ddlyy Status psi Days Months psi Days ID Tag Number psi Days Months 385 Barksdale B2T-M12SS NBI-PS-51D 03/21/02 AF 882 71 2.3 -6.0 252 386 Barksdale B2T-M12SS NBI-PS-51D 03/21/02 AL 882 387 Barksdale B2T-M12SS NBI-PS-51D 01/09/02 AF 887 97 3.2 -1.0 181 388 Barksdale B2T-M12SS NBI-PS-51D 01/09/02 AL 887 389 Barksdale B2T-M12SS NBI-PS-51D 10/04/01 AF 890 84 2.8 2.0 84 390 Barksdale B2T-M12SS NBI-PS-51D 10/04/01 AL 890 391 Barksdale B2T-M12SS NBI-PS-51D 07112/01 AF 888 84 2.8 1.0 168 392 Barksdale B2T-M12SS NBI-PS-51 D 07/12/01 AL 888 393 Barksdale B2T-M12SS NBI-PS-51D 04/19/01 AF 887 84 2.8 0.0 84 394 Barksdale B2T-M12SS NBI-PS-51D 04/19/01 AL 887 395 Barksdale B2T-M12SS NBI-PS-51D 01/25/01 AF 880 84 2.8 -7.0 420 396 Barksdale B2T-M12SS NBI-PS-51D 01/25/01 AL 887 397 Barksdale B2T-M12SS NBI-PS-51D 11102/00 AF 882 84 2.8 -5.0 336 398 Barksdale B2T-M12SS NBI-PS-51 D 11/02/00 AL 882 399 Barksdale B2T-M12SS NBI-PS-51D 08/10/00 AF 887 82 2.7 0.0 252 400 Barksdale B2T-M12SS NBI-PS-51D 08/10/00 AL 887 401 Barksdale B2T-M12SS NBI-PS-51D 05/20/00 AF 885 86 2.8 -2.0 170 402 Barksdale B2T-M12SS NBI-PS-51D 05/20/00 AL 885 403 Barksdale B2T-M12SS NBI-PS-51D 02/24/00 AF 882 84 2.8 -5.0 84 404 Barksdale B2T-M12SS NBI-PS-51D 02/24/00 AL 882 405 Barksdale B2T-M12SS NBI-PS-51D 12102/99 AF 879 56 1.8 -6.0 84 406 Barksdale B2T-M12SS NBI-PS-51D 12/02/99 AL 887 407 Barksdale B2T-M12SS NBI-PS-51D 10/07/99 AF 885 28 0.9 0.0 28 408 Barksdale B2T-M12SS NBI-PS-51D 10/07199 AL 885 409 Barksdale B2T-M12SS NBI-PS-51D 09/09/99 AF 881 29 1.0 -6.0 113 410 Barksdale B2T-M12SS NBI-PS-51D 09/09199 AL 885 411 Barksdale B2T-M12SS NBI-PS-51D 08/11/99 AF 886 30 1.0 -1.0 84 412 Barksdale B2T-M12SS NBI-PS-51D 08/11/99 AL 886 413 Barksdale B2T-M12SS NBI-PS-51D 07/12/99 AF 889 27 0.9 2.0 54 414 Barksdale B2T-M12SS NBI-PS-51D 07/12/99 AL 889 415 Barksdale B2T-M12SS NBI-PS-51D 06/15/99 AF 887 27 0.9 0.0 27 416 Barksdale B2T-M12SS NBI-PS-51D 06/15/99 AL 887 417 Barksdale B2T-M12SS NBI-PS-51D 05/19/99 AF 893 27 0.9 4.0 84 418 Barksdale B2T-M12SS NBI-PS-51 D 05/19/99 AL 887 419 Barksdale B2T-M12SS NBI-PS-51D 04/22/99 AF 888.5 29 1.0 -0.5 57 420 Barksdale B2T-M12SS NBI-PS-51D 04/22/99 AL 888.5 421 Barksdale B2T-M12SS NBI-PS-51D 03/24/99 AF 885 28 0.9 -4.0 28 422 Barksdale B2T-M12SS NBI-PS-51 D 03/24/99 AL 885 423 Barksdale B2T-M12SS NBI-PS-51 D 02/24/99 AF 424 Barksdale B2T-M12SS NBI-PS-51 D 02/24/99 AL 889

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Outliers & Summary Page 19 of 33 Extreme Exrm Final Drift Final Drift Drift Cal Interval Seq. ID Tag ID (pDi) (Days) Studentized Data Set Cal Set (% of Deviate (T) (psi) (Days) etpoint) 1 NBI-PS-51A -4.7 104 0.241 -4.7 104 -0.458 3 NBI-PS-51A 5.4 450 1.381 Raw Drift Data Statistics Summary 5.4 450 0.526 13 NBI-PS-51A 1.8 534 0.803 (initial Data Set) 1.8 534 0.175 25 NBI-PS-51A -0.7 549 0.401 Mean (Average) -3.2000 -0.7 549 -0.068 37 NBI-PS-51A 0.7 503 0.626 Variance 38.8033 0.7 503 0.068 49 NBI-PS-51A -2.8 504 0.064 Std. Dev. 6.2292 -2.8 504 -0.273 61 NBI-PS-51A 3.8 505 1.124 Sample Size (Count) 50 3.8 505 0.370 73 NBI-PS-51A -2.0 561 0.193 Maximum 9.200 -2 561 -0.195 89 NBI-PS-51A 3.0 196 0.995 Median -5.000 3 196 0.292 105 NBI-PS-51B -4.6 104 0.225 Minimum -23.000 -4.6 104 -0.519 107 NBI-PS-51B 4.1 182 1.172 Range 32.200 4.1 182 0.462 111 NBI-PS-51 B -9.0 364 0.931 Sum -160.000 -9 364 -1.015 121 NBI-PS-51B -7.0 182 0.610 Kurtosis 0.673 -7 182 -0.789 125 NBI-PS-51B 9.2 546 1.991 Skewness -0.238 9.2 546 1.037 135 NBI-PS-51B -6.2 510 0.482 -6.2 510 -0.699 147 NBI-PS-51B 5.0 168 1.316 Critical T-Value (Upper 5% Signif.) 2.96 5 168 0.564 151 NBI-PS-51B -6.0 252 0.449 -6 252 -0,676 157 NBI-PS-51 B -6.2 57 0.482 Equation for Each Studentized Deviate: T= IDrift-Meanh/Std. Dev. -6.2 57 -0.699 159 NBI-PS-51 B -23.0 531 3.179 Crit T Value Lookup Value from Ref. 3.1.3 Table 2, per sample OUTLIER OUTLIER OUTLIER 171 NBI-PS-51B -2.0 337 0.193 size. See Sections 3.6.1 and 3.6.2 of Reference 3.1.3. -2 337 -0.225 179 NBI-PS-51B -9.0 253 0.931 Outliers are highlighted. -9 253 -1.015 185 NBI-PS-51B -9.0 83 0.931 Seq ID 159 identified as an outlierandis removed. -9 83 -1.015 187 NBI-PS-51B -14.0 337 1.734 -14 337 -1.578 209 NBI-PS-51C -2.0 182 0.193 Drift Data Statistics Summary -2 182 -0.195 213 NBI-PS-51C 5.1 92 1.332 (Final Data Set) 5.1 92 0.497 215 NBI-PS-51C -8.0 546 0.771 Mean (Average) -2.7959 -8 546 -0.779 229 NBI-PS-51C 6.0 546 1.477 Variance 31.2775 6 546 0.584 241 NBI-PS-51C -8.0 532 0.771 Std. Dev. 6.5926 -8 532 -0.779 255 NBI-PS-51C 2.2 322 0.867 Sample Size (Count) 49 2.2 322 0.214 263 NBI-PS-51C -5.0 181 0.289 Maximum 9.200 -5 181 -0.487 267 NBI-PS-51C -7.0 492 0.610 Median -5.000 -7 492 -0.682 279 NBI-PS-51C -1.0 349 0.353 Minimum -14.000 -1 349 -0.097 287 NBI-PS-51C -5.0 250 0.289 Range 23.200 -5 250 -0.487 293 NBI-PS-51C -9.0 170 0.931 I~um -137.000 -9 170 -0.876 297 NBI-PS-51C -9.0 281 0.931 Kurtosis -0.978 -9 281 -0.876 317 NBI-PS-51D -5.3 547 0.337 Skewness 0.401 -5.3 547 -0.598 329 NBI-PS-51 D 6.3 92 1.525 6.3 92 0.710

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Outliers & Summary Page 20 of 33 Extreme Exrm Final Drift Final Drift Drift Cal Interval Cal Interval Se(%o Seq. ID Tag ID Drsift Cal In s Studentized Data Set Set (% of D(psi) (Days) Deviate (T)

(psi) (Days) Setpolnt) 333 NBI-PS-51 D -8.8 181 0.899 -8.8 181 -0.992 337 NBI-PS-51D 5.4 185 1.381 5.4 185 0.609 341 NBI-PS-51 D -8.0 451 0.771 Equation for Drift % of Setpoint -8 451 -0.902 351 NBI-PS-51D -6.0 359 0.449  % of Setpoint = drift/setpoint (either 1027 or 887)*100 -6 359 -0.676 361 NBI-PS-51D -6.7 166 0.562 -6.7 166 -0.755 365 NBI-PS-51 D 5.0 84 1.316 Setpoint used for NBI-PS-51A1C 1027 5 84 0.564 367 NBI-PS-51 D -7.0 506 0.610 Setpoint used for NBI-PS-51 BID 887 -7 506 -0.789 379 NBI-PS-51 D -7.0 503 0.610 -7 503 -0.789 391 NBI-PS-51 D 1.0 168 0.674 Note that actual setpoint for NBI-PS-51A is 1037psig. 1 168 0.113 395 NBI-PS-51 D -7.0 420 0.610 1027psig is used to group NBI-PS-51A/C, and is conservative. -7 420 -0.789 405 NBI-PS-51 D -6.0 84 0.449 -6 84 -0.676 409 NBI-PS-51D -6.0 113 0.449 -6 113 -0.676 417 NBI-PS-51D 4.0 84 1.156 4 84 0.451 Drift Data Statistics Summary (Final Data Set - % of Setpoint)

Mean (Average) -0.3039 Variance 0.3676 Std. Dev. 0.6063 Sample Size (Count) 49 Maximum 1.037 Median -0.487 Minimum -1.578 Range 2.616 Sum -14.889 KurtosIs -0.873 Skewness 0.374

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 W Test Page 21 of 33 Drift ""

  • bi (Per Stop Values 4)

-14 1 0.377 8.746;4 Specific W Normality Test Methodology from Reference 3.1.7 and Section 19 of Reference 3.1.4

-9 2 0.2589 3.961 2

-9 3 0.2271 3.40655 Steps to Perform:

-9 4 0.2038 2.93447 1. Paste all final drift data into column 1.

-9 5 0.1851 2.66554 2. Sort in ascending order.

-8.8 6 0.1692 2.351 9 3. Calculate S2 taking the variance of the drift data adjusted by (Count-i)

-8 7 0.1553 2.018 i9 s2 = (n-1)(Variance (Drift))

-8 8 0.1427 1.855 51

-8 9 0.1312 1.587'5

-7 10 0.1205 1.325 54 where: n = Count

-7 11 0.1105 1.193 34

-7 12 0.101 1.010 0 4. Calculate the Quantity b:

-7 13 0.0919 0.845 55

-7 14 0.0832 0.732:2 b - Sum[(an.i+1 )(Xn.+l 1 - xi)]

-6.7 15 0.0748 0.576 .0

-6.2 16 0.0667 0.460 2 where: i 1 to k

-6.2 17 0.0588 0.323 4 k =(n-1)/2

-6 18 0.0511 0.255 55

-9 19 0.0436 0.305 2

-6 20 0.0361 0.144 .4

-6 21 0.0288 0.115 .2

-6 22 0.0215 0.068 .8

-5.3 23 0.0143 0.010 0

-5 24 0.0071 0.002

-5 b= 36.8950

-4.7 (Per Step 4) a-i.+1 values are taken from Table 1 of Reference 3.1.7.

-4.6

  • From Table 1 of Re:f. 3.1.7. Calculate b2 .

-2.8 Compute the W Statistic and compare to the critical value at the 5% confidence

-2 level. The table of critical values is given as Table 2 on page 9 of Reference 3.1.7.

-2

-2

-1

-0.7 0.7 1

1.8 2.2 3

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 W Test Page 22 of 33 Drift rbT'" 1 ( rStepr Values:[ i 1 I (

3.8 W = Computed Values 4 S2= 1501.3192 4.1 b= 36.8950 5 b2= 1361.2410 5 Count (n): 49 5.1 W = b2/S 2 0.9067 5.4 W Critical 0.947 5% Significance From Table 2 of Reference 3.1.7.

5.4 6

6.3

9.2 Results

Since the W statistic,0.9067, is less than the criticalvalue for W, 0.947, this test rejects the assumption of normalityfor this data set.

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109 Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Pooling Page 23 of 33 Group 1: NBI-PS-51AIC Setpoints: 1027/1037 psig Group 2: NBI-PS-51B/D Setpoints: 887 psig Since the setpoints are not within 5%, the drift values were converted to % of setpoint and used for the pooling test.

% of Setpoint = drift/setpoint (either 1027 or 887)*100

% of Setpoint t-Test: Two-Sample Assuming Unequal Variances Group I Group 2 Mean -0.153359299 -0.401686918 Variance 0.239471591 0.473623019 Observations 20 27 Hypothesized Mean Difference 0 df 45 t Stat 1.445447623 P(T<=t) one-tail 0.077630393 t Critical one-tail 1.679427393 P(T<=t) two-tail 0.155260786 t Critical two-tail 2.014103359 Std Dev 0.481567242 0.675699348

Conclusion:

The only significant difference in the groups of devices is the setpoint.

The standard deviation values are close to equal.

The t Stat is less than t Critical two-tail, indicating acceptability in combining the groups. The standard deviations and means are similar. Therefore, the two groups of data are combined for drift analysis.

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109, Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Coverage Analysis Page 24 of 33 BnDistribution Cumulative Normal Expected Bno Bin Descriptions No. StDev Bin Maximums =Observed Probability (CP 1) Pisrobabiit (rel uency~N No. (NS) Mean + (NS*StDev) Frequency (Table 18-2 Ref 3.1.4) ProbabiliFrequency (Pnorm = CPI-CP,.1 ) (Ei = Pnorm*N) 1 Up to - 2.5 Standard Deviations from Mean -2.5 -1.8196 1 0.0062 0.0062 0.3038 2 -2.5 to -2.0 Standard Deviations from Mean -2.0 -1.5165 0 0.0228 0.0166 0.8110 3 -2.0 to -1.5 Standard Deviations from Mean -1.5 -1.2133 4 0.0668 0.0441 2.1585 4 -1.5 to -1.0 Standard Deviations from Mean -1.0 -0.9102 17 0.1587 0.0919 4.5007 5 -1.0 to -0.5 Standard Deviations from Mean -0.5 -0.6070 5 0.3086 0.1499 7.3451 6 -0.5 Standard Deviations from Mean to Mean 0.0 -0.3039 6 0.5000 0.1915 9.3811 7 Mean to +0.5 Standard Deviations from Mean 0.5 -0.0007 5 0.6915 0.1915 9.3811 8 +0.5 to +1.0 Standard Deviations from Mean 1.0 0.3025 8 0.8414 0.1499 7.3451 9 +1.0 to +1.5 Standard Deviations from Mean 1.5 0.6056 Z2 1 0.9332 0.0919 4.5007 10 +1.5 to +2.0 Standard Deviations from Mean 2.0 0.9088 1 0.9773 0.0441 2.1585 11 +2.0 to +2.5 Standard Deviations from Mean 2.5 1.2119 0 0.9938 0.0166 0.8110 12 More than Mean + 2.5 Standard Deviations More More 0 1.0000 0.0062 0.3038 Totals 49 49 Observed Observed Percentage for

+I- Sigma Bounds Drift Values Percentages Normal

________________________________ ___________________ Distribution 2.5 (Bins 2-11) 48 97.96% Mean -0.3039 2 (Bins 3-10) 48 97.96% 95.45% Std. Dev. 0.6063 1.5 (Bins 4-9) 43 87.76% Sample Size 49 1 (Bins 5-8) 24 48.98% 68.27% Kurtosis -0.873 0,5 (Bins 6-7) 11 22.45%

Methodology for CoverageAnalysis Taken from Section 19 of Reference 3.1.4 and Section 3.7.5 of Reference 3.1.3

1. Order the drift data in ascending order.
2. Obtain mean, standard deviation, sample size, and kurtosis.
3. Establishing bins in 1/2 sigma increments from the mean to 2.5 sigma in both directions, derive the upper bin limits, in units of drift, based on the values of the mean and standard deviation.
4. Obtain expected frequency for a normal distribution in each bin.
5. Manually compute the number of observed drift data points within each bin, and list under observed frequency.
6. Plot the Expected Frequency and the Observed Frequency Data on the Histogram for comparison to each other.
7. Compare the population of data within the +/- 2 standard deviation limits to that of a normal distribution. If necessary, adjust the standard deviation upward to obtain greater than or equal to the percentage contained by a normal distribution.

The kurtosis value is slightly negative, which signifies a wider peak around the mean (that is, a higher probability than a normally distributed variable of values near S Results: The data did not pass the W Test, so a coverage analysis is necessary. The data is highly peaked at 1 standard deviation, as is apparent from the Histogram.

the mean) and thinner tails, as shown on the Histogram. The observed percent of data within +/- 2 standard deviations is greater than that of a normal distribution.

Therefore, the data may be conservatively modeled as a normal distribution without adjustment to the standard deviation. I

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109, Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Coverage Analysis Page 25 of 33 Histogram of Drift - Cooper Nuclear Station Barksdale B2T-M12SS Pressure Switches 18 16 14 12 0

= 10 8

0 IL I ~~ -1.8 -1.8196

-1.5165 -1.2133 -0.9102 -0.6070 -0.3039 -0.0007 0.3025 0.6056 0.9088 1.2119 More Drift (% of Setpoint)

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109, Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Scatter Plot Page 26 of 33 Scatter Plot - Cooper Nuclear Station Barksdale B2T-M12SS Pressure Switches 1.5 I y = -8.799E-05x - 2.766E-01 I 1.0 +

'0 0.5 0.0 4-9 0 9

-0.5 *

  • 9 9<*O*

o -1.0

-1.5

-Linear (Drift)

-2.0 0 100 200 300 400 500 600 Time (Days)

Note: Equation on Scatter Plot is computer generated, based on the associated trend line.

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109, Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Binning Analysis Page 27 of 33 Bin Statistics Bin 1 Bin 2 Bin 3 Bin 4 Bin 5 Bin 6 Bin 7 Count 0 10 11 13 15 0 0 Standard Dev. #DIV/0' 0.6542 0.6194 0.5663 0.5793 #DIV/0! #DIV/0!

Mean #DIV/0! -0.1821 -0.1868 -0.5844 -0.2277 #DIV/0! #DIV/0!

,Mean Interval #DIV/0! 89.70 178.27 , 340.38 525.60 #DIV/0! #DIV/O!

Max Interval 0 113 196 451 561 0 0 Bin Definition and Selection Bin Hi Valid Limit Bin Population Bins Bins (Days) Count Percentage Included 1 45 0 0.0%

2 135 10 20.4% 2 3 230 11 22.4% 3 4 460 13 26.5% 4 5 690 15 30.6% 5 6 915 0 0.0%

7 Over 0 0.0%

Total Count: 49 100%

See Section 3.9.3 of Reference 3.1.3 for Binning Analysis Methodology.

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M 12SS NEDC 11-109, Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Binning Analysis Page 28 of 33 Graph Summary Bin Time Std Dev Mean 2 89.70 0.6542 -0.1821 Test of Variances 3 178.27 0.6194 -0.1868 F Critical 2.637 4 340.38 0.5663 -0.5844 Variance Ratio 1.046 5 525.60 0.5793 -0.2277 Potential Strong TD No of Random Drift?

Binning Analysis - Cooper Nuclear Station Barksdale B2T-M12SS Pressure Switches 0.8 0.6 o 0.4 S 0.2 0 0.0

~ -0.2

  • r: -0.4

-.-4-4 Std Dev

-0.6 -- Mean

-0.8 0 100 200 300 400 500 600 Time (Days)

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109, Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Regression - Drift Page 29 of 33 Regression Analysis - Drift REGRESSION ANALYSIS

SUMMARY

OUTPUT Regression Statistics F Critical Multiple R 0.0252661 3.195056 R Square F0.0006384 Adjusted R Square -0.020625 Standard Error 0.6125298 Observations 49 ANOVA df SS MS F Significance F Regression 1 0.011264355 0.0112641 0.03002281 0.863182486 Residual 47 17.63405998 0.375193 Total 48 17.64532433 Coefficients Standard Error t Stat P-value Lower95% Upper 95% Lower 95.0% Upper 95.0%

Intercept -0.27662 0.17990526 -1.537588 0.1308551 -0.638542807 0.08530258 -0.63854281 0.08530258 Time -8.8E-05 0.000507836 -0.1732711 0.86318251 -0.001109627 0.00093364 -0.00110963 0.00093364 Refer to Section 3.9.4 of Reference 3.1.3 for Methodology for Regression Analysis.

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M1 2SS NEDC 11-109, Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Regression - Drift Page 30 of 33 Time Line Fit Plot

  • Drift % of Setpoint 1.5
  • Predicted Drift % of Setpoint 1.0 0.5 0.

CL

.a 0.0 6

0. 600 U 300. 4005 W&iF0 N N OWN

-0.5 $

-1.0

-1.5 -

-2.0 -

Time (days)

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109, Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Regression - AV of Drift Page 31 of 33 Regression Analysis - AV of Drift ABSOLUTE VALUE REGRESSION ANALYSIS

SUMMARY

OUTPUT F Critical 3.195056 Regression Statistics Multiple R 0.08232937 R Square 0.00677813 Adjusted R Square -0.01435425 Standard Error 0.31097948 Observations 49 ANOVA df SS MS F Significance F Regression 1 0.031018778 0.0310191 0.320745971 0.573854225 Residual 47 4.54528721 0.096708 Total 48 4.576305988 Coefficients Standard Error t Stat P-value Lower95% Upper 95% Lower 95.0% Upper 95.0%

Intercept 0.64439967 0.091337342 7.055161 6.7418E-09 0.460652641 0.8281467 0.46065264 0.828146698 Time -0.00014602 0.000257827 -0.5663441 0.573854221 -0.0006647 0.00037266 -0.0006647 0.000372662 Refer to Section 3.9.4 of Reference 3.1.3 for Methodology for Regression Analysis.

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109, Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Regression - AV of Drift Page 32 of 33 Time Line Fit Plot 1.800 1.600

  • Drift % of Setpoint 1.400
  • Predicted Drift % of Setpoint 4-) 1.200-1.000 0

0.800 CA- U U

-. a 0.600 Ul U-ET 0.400 1 0.200 0.000 0 100 200 300 400 500 600 Time (days)

INSTRUMENT DRIFT ANALYSIS Barksdale B2T-M12SS NEDC 11-109, Rev. 0 COOPER NUCLEAR STATION Pressure Switches Appendix 1 Analyzed Drift (DA) Page 33 of 33 Drift Bias Determination First, the bias term is evaluated for significance per Section 3.11 of Reference 3.1.3.

Per Outlier Statistical Summary, Time Dependency Moderate Count (n) 49 Drift Data Points Degrees of Freedom (df = n-1) 48 Absolute Value of Average of FDS 0.3039 % of Setpoint Standard Deviation (SFDS) 0.6063 % of Setpoint Average Bin 5 Observed Interval 525.6 Days Maximum Required Cal Interval 915 Days t (for df = 48) 2.011 (Ref. 3.1.3, Table 4)

Significant Bias Critical Value (Xcnt)

[Xclt = t

  • SFDS / (n)A0.5]

Xcrt = 0.1742 The bias value for this drift data set is significant, since the Absolute Value of the Average is greater than the xit value.

DAbias (current) = -0.3039 % of Setpoint

[Extrap Bias Drift = DAbias (current) * (Maximum Required Cal Interval /Average Bin 5 Observed Interval)")]

DAbias (extrap) = -0.401 % of Setpoint Random Drift Determination Time Dependency Count (n) 49 Drift Data Points Standard Deviation (from FDS) 0.6063 % of Setpoint the SD of the FDS is more conservative than bin 5 Average Bin 5 Observed Interval 525.6 Days Maximum Required Cal Interval 915 Days Tolerance Interval Factor (TIF) 2.408 (Ref. 3.1.3, Table 1)

Normality Adjustment Factor (NAF) 1.000 (NAF not required per coverage analysis)

[Current Interval Drift = SFDS

  • TIF
  • NAF]

DArandom (curnt) = +/- 1.460  % of Setpoint

[Extrap Drift = DArandom (current) * (Maximum Required Cal Interval /Average Bin 5 Observed Interval)lrz]

DArardom (extrap) = +1- 1.926  % of Setpoint for up to 915 Days

Retrieved from "https://kanterella.com/w/index.php?title=NLS2012033,_Enclosure_4_-_Calculation_Nedc_11-109,_Rev._0,_Instrument_Drift_Analysis_for_NBI-PS-51A/B/C/D_(Barksdale_B2T-M12SS)&oldid=2462658"