ML073330317
| ML073330317 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 11/27/2007 |
| From: | Gerald Bichof Dominion Nuclear Connecticut |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 07-0775 | |
| Download: ML073330317 (27) | |
Text
Dominion Nuclear Connecticut, Inc.
~ooo Dominion Boulevard, Glen Allen, Virginia 2.)1)60 Web Address: www.dom.com November 27, 2007 U.S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2738 Serial No.
07-0775 MPS LicNVDB R2 Docket No.
50-336 License No.
DPR-65 DOMINION NUCLEAR CONNECTICUT, INC.
MILLSTONE POWER STATION UNIT 2 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING INSTRUMENTATION TECHNICAL SPECIFICATION CHANGES Dominion Nuclear Connecticut, Inc.
(DNC) submitted a
proposed license amendment to modify the Technical Specification Action and Surveillance Requirements for instrumentation identified in Millstone Power Station Unit 2 Technical Specifications 3.3.1 and 3.3.2 on November 8, 2006 (Serial No. 06-0841).
DNC responded to requests for additional information (RAls) regarding this proposed change on May 4, 2007 and October 4, 2007 (Serial Nos. 06-0841A and 06-0841 B). The NRC sent an additional RAI on November 15, 2007.
The response to the RAI is provided in Attachment 1 of this letter. Attachment 2 to the letter contains a revised calculation that was discussed in a November 2, 2007 conference call and in our RAI response. The signatures of the individuals who prepared, reviewed, and approved the calculation have been removed for this docketed submittal.
The additional information provided in this letter does not affect the conclusions of the significant hazards consideration discussion in DNC's original submittal dated November 8, 2006.
In accordance with 10 CFR 50.91(b), a copy of this response is being provided to the State of Connecticut.
Serial No. 07-0775 Docket No. 50-336 Response to Request for Additional Information Page 2 of 3 Should you have any questions about the information provided or require additional information, please contact Ms. Margaret A. Earle at (804) 273-2768.
Sincerely, t;!~i~~-6 Vice President - Nuclear Engineering COMMONWEALTH OF VIRGINIA COUNTY OF HENRICO The foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by Gerald T.
Bischof, who is Vice President -
Nuclear Engineering, of Dominion Nuclear Connecticut, Inc.
He has affirmed before me that he is duly authorized to execute and file the foregoing document in behalf of that Company, and that the statements in the document are true to the best of his knowledge and belief.
Acknowledged before me this i\\7'f1.,
day of n~.£1
,2007.
My Commission Expires:
~-r ~/. 2pt>fJ MARGARET *. IINNETT Nolary PubOc..3Sf.30~
Commonwealth of VirgInia My CommllllOn bpI.... Aug 31. 2001
~
~4~AAU'7L Notary Public
Serial No. 07-0775 Docket No. 50-336 Response to Request for Additional Information Page 3 of 3 Attachments:
1.
Response to Request for Additional Information 2.
Calculation ZPM_Drift-0426012, Rev 1, dated 11/7/07, "Zero Power Mode Drift Analysis in Support of LBDCR 06-MP2-036" Commitments made in this letter: None.
cc:
U.S. Nuclear Regulatory Commission Region I Regional Administrator 475 Allendale Road King of Prussia, PA 19406-1415 C. J. Sanders NRC Project Manager Millstone Units 2 and 3 U.S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 8B3 Rockville, MD 20852-2738 NRC Senior Resident Inspector Millstone Power Station Director Bureau of Air Management Monitoring &Radiation Division Department of Environmental Protection 79 Elm Street Hartford, CT 06106-5127
Serial No. 07-0775 Docket No. 50-336 ATTACHMENT 1 INSTRUMENTATION TECHNICAL SPECIFICATION CHANGES RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION DOMINION NUCLEAR CONNECTICUT, INC.
MILLSTONE POWER STATION UNIT 2
Serial No. 07-0775 Docket No. 50-336 Response to Request for Additional Information Page 1 of 2 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION During a conference call on November 2,
- 2007, the NRC requested additional information (RAI) from Dominion Nuclear Connecticut, Inc. (DNC) regarding a proposed change to the Millstone Power Station Unit 2 (MPS2) instrumentation technical specifications.
The requested information is necessary in order for the NRC staff to complete its review.
The information requested is provided below.
NRC Question No.1.
By letter dated November 8, 2006, supplemented by letters dated May 4, 2007, and October 4, 2007, Dominion Nuclear Connecticut (the licensee) proposed a License Amendment Request for Millstone Power Station, Unit 2, to modify the Technical Specifications (TS) Action and Surveillance Requirements for instrumentation identified in TS Table 2.2-1, TS 3.3.1 and TS 3.3.2.
By letter dated October 4, 2007, the licensee provided Calculation ZPM_Drift-0426012, "Zero Power Mode Drift Analysis in Support of LBDCR 06-MP2-036," Rev 0, dated 9/14/07. The EICB has reviewed the calculation and determined that the following information is required to complete EICB's review:
Most of the calculations in ZPM_Drift-0426012 are performed using values in decades instead of real numbers.
Specifically, the Total Expected Uncertainty, SVerror, has been calculated in Section 6.8, Setpoint Derivation, by taking the square root of the sum of the squares of applicable individual uncertainties in decades.
Later in section 6.8, it is explained that a decade number is the logarithm (log) of a real number, e.g. Log(102) is equal to 2 decades and Log (10-8) is equal to -8 decades.
It is explained in Section 6.8 that the related instruments have a percentage span of 10 decades corresponding to the range from 10-8 to 102.
When two numbers in decades are added (+), the result in decades is equal to the log of the product (x) of the two real numbers:
For example: 2 decades + 3 decades is = 5 decades, which is equivalent to log (105) or equivalent to 105 in real numbers or 10,000.
Doing similar addition in real numbers results in 100 (2 decades) + 1000 (3 decades) = 1100.
When two numbers in decades are subtracted (-), the result in decades is equal to the log of the division between the two real numbers:
Serial No. 07-0775 Docket No. 50-336 Response to Request for Additional Information Page 2 of 2 For example: 3 decades - 2 decades is = 1 decades, which is equivalent to log(1 01) or equivalent to 10 in real numbers or equal to 1000.;-
100.
Doing corresponding subtraction in real numbers is 1000 (3 decades) - 100 (2 decades) = 900.
Similarly, squaring a number in decade gives much different number from squaring the equivalent real numbers:
For example: (3 decades)2 =9 decades or 109, while (1000)2 =106.
Most of the formulae used in ZPM_Drift-0426012, specifically for calculating SVerror, are valid for real numbers.
ISA-RP67.04.02-2000 has addressed similar consideration in Clause 2.3 of Example Calculation - Radiation Trip.
Provide justifications for performing all calculations in ZPM_Drift-0426012, specifically calculation of drift, SVerror, As-found, As-left, and trip setpoint band using numbers in decades instead of real numbers.
DNC Response DNC Calculation ZPM_Drift-0426012, Rev 1, dated 11/7/07, "Zero Power Mode Drift Analysis in Support of LBDCR 06-MP2-036," is provided as Attachment 2.
Revision 1 updated this calculation to utilize the methodology prescribed within Instrument Society of America (ISA) Standard ISA-RP67.04.02-2000 "Methodologies for the Determination of Setpoints for Nuclear Safety Related Instrumentation." The ISA standard uses units of percent Equivalent Linear Full Scale (ELFS). The use of ELFS does not change the conclusions of the calculation.
This calculation confirms that the wide range neutron flux instrument rack drift occurring over the period of extended surveillance test interval (STI) will not cause the Zero Power Mode (ZPM) operating bypass channel setpoint value to exceed the allowable value.
Accordingly, the wide range neutron flux ZPM bypass bistable trip upper limit will be set at less than or equal to 7.413E-05%.
This calculation concludes that the change of the CHANNEL FUNCTIONAL TEST frequency for the ZPM operating bypass channels from monthly to 92 days prior to each reactor startup is acceptable.
Serial No. 07-0775 Docket No. 50-336 ATTACHMENT 2 INSTRUMENTATION TECHNICAL SPECIFICATION CHANGES CALCULATION ZPM DRIFT-0426012, REV 1, DATED 11/7/07 ZERO POWER MODE DRIFT ANALYSIS IN SUPPORT OF LeDCR 06-MP2-036 DOMINION NUCLEAR CONNECTICUT, INC.
MILLSTONE POWER STATION UNIT 2
Approved 1III7/03 Effective__.....
I-'-"l/=-2~l/-"'03"'-
CALCULATION TITLE PAGE Total Number of Pages: 21",
TITLE ZPM DRIFT-0426012 CALCULATION No.
NA VENDOR CALCULATION No.
N/A Revision No.
N/A Revision No.
Zero Power Mode Drift Analysis in Support ofLBDCR 06-MP2-036 REC'D~
ON HOlD: 1\\ \\jJ Ot1 PRQCESSED,_---
RMI__------
VENDOR NAME NUCLEAR INDICATOR:
50.59 Evaluation or Screen Calc. Supports Calc. Supports I8ICATl Attached DCRlMMODIEE?
Other Process?
DRwQA DSBOQA DFPQA DATWSQA DNON-QA DYES
[8JNO DYES
[8JNO
[8JVES DNO INCORPORATES:
CCN NO:
AGAINST REV.
Ref. No.
LBDCR 06-MP2-036 Reference
,ORIGINAL I Executive Summary
.11.
LBDCR 06-MP2-036 is proposing extending the surveillance requirement for the auto removal ofthe Zero Power Mode Bypass function from a monthly interval to once within 92 days ofa reactor startup. To support the proposed surveillance extension for the auto removal ofthe Zero Power Mode Bypass function, a detailed drift analysis is required to be performed. Existing Calculation PA79-219-00767GE used a drift value of0.08 decades for an assumed calibration interval of24 months. The drift analysi~iJJverifY'that extending the existing monthly functional check to once within 92 days ofa reactor startup 'Y.ll1ibt result in actual equipment drift beyond the assumed values within Calculation PA79-219-00767GE. Also,: this calculatio~determined the upper trip setpoint limit for the auto removal ofthe Zero PowerMode Bypass function~ Revision I updated this calculation to utilize the methodology prescribed within Instrument Society ofAmerica Standard ISA-RP67.04.02-2000 "Methodologies for the Determination ofSetpointsfor Nuclear Safety RelatedInstrumentation". The ISA standard uses units' of%
Equivalent Linear Full Scale (ELFS). The use ofELFS does not change the conclusions ofthe calculation.
Date:
Date:
Date: 1/ 71tJ7 Date: Ii Discipline:
Discipline:
~
-. '.';-:'--~------ - --=-----= - -
~--
Interdiscipline Reviewer: N/A Independent Reviewer:
Engineering Approver:
Installation Verification o Calculation represents the installed configuration and approved licensing condition (Calculation ofRecord) o N/A does not affect plant configuration (e.g., study, hypothetical analysis, etc.)
PreparerlDesigner Engineer: (Print and Sign)
Date:
DCM 05-1A Rev. 011 Page 1 ofl
fIIIiI r,
~
\\
I
!I
~
Approved 9/22/04 Effective 9/27/04
/-.~-
~I-PassPort DATABASE INPUTs Page 2
Calculation Number:
ZPM DRIFT*0426012 Revision:
1 Vendor Calculation Number/Other:
N/A Revision:
N/A CCN#
N/A Calc Voided:
DYes I2J No Superseded By:
N/A Supersedes Calc:
N/A Discipline (Up to 10)
I, N Unit Project Reference Component Id Computer Code Rev. No.1 (MI,M2,M3)
(EWA, DCR or MMOD)
Level No.
M2 N/A WR-LOG-A Microsoft Excel 9.0 WR-LOG-B WR-LOG-C WR-LOG-D IQ MEL CODES*
Structure System Component Reference Calculation Rev CCN No.
N/A
- The codes required must be alpha codes designed for structure, system and component.
NOTE: Avoid multiple item references on a line: e.~., LT 1210 A-D requires fOUf separate lines.
Reference Dra'YJng Sheet Rev. No.
N/A i:::;,*,~,:,,~
/','
Comments:
Referenced By Calculation Impact Impact AR Reference/Calc Change Ref.
Y N
N/A DCMOS-OOIB Rev 009~Ol Page 1 of I
Section & Title Calculation No. ZPM_DRIFT-04260I2, Rev. 1 TABLE OF CONTENTS COVER PAGE PASSPORT DATABASE INPUTS TABLE OF CONTENTS 1.0 PURPOSE 2.0
SUMMARY
OF RESULTS
3.0 REFERENCES
IDESIGN INPUTS 4.0 ASSUMPTIONS 5.0 METHOD OF CALCULATION 6.0 BODY OF CALCULATION 7.0 DESIGN VERIFICAnON 8.0 ATTACHMENTS Appendix A - Historical Surveillance Data - WR-LOG-A,B,C 8iD, DCM Form 5-IC DCM Form 5-ID TOTAL 1
2 3
4 4
5 6
7 8
14 AI-A5 A6 A7 21 pgs Page 3 of14
Calculation No. ZPM_DRIFT-04260I2, Rev. 1 1.0 PURPOSE The purpose ofthis calculation is to estimate 92 day drift values for the auto removal ofthe Zero Power Mode Bypass function. LBDCR 06-MP2-036 is proposing extending the surveillance requirement for the auto removal ofthe Zero Power Mode Bypass function from a monthly interval to once within 92 days of a plant startup. To support the proposed surveillance extension for the auto removal ofthe Zero Power Mode Bypass function, a detailed drift analysis is required to be performed. Existing calculation PA79-219-00767GE used a drift value of.08 decades for an assumed calibration interval of24 months. The drift analysis will verify that extending the existing monthly functional check to once within 92 days ofa plant startup will not result in actual equipment drift beyond the assumed values within calculation PA79-219-00767GE. This calculation shall also determine the upper trip setpoint limit for the auto removal ofthe Zero Power Mode Bypass function.
Revision 1 ofthis calculation expressed error terms in % ELFS instead ofdecades.
This was done to be consistent with ISA Standard ISA-RP67.04.02-2000 "Methodologiesfor the Determination ofSetpointsfor Nuclear Safety Related Instrumentation" 2.0
SUMMARY
OF RESULTS The bounding values ofdrift for a 92 day surveillance requirement, derived from historical calibration data for Wide Range Nuclear Instrumentation WR-LOG-A, WR-LOG-B, WR-LOG-C and WR-LOG-D is Bound =+/- 0.269% Equivalent Lin~ Full Scale (ELFS)
This value is less than the diifi term us~d in Calculation PA7-9-219-00767GE Revision 1. Calculation PA79-219-00767GE Revision 1 determined electronic drift to be +/- 0.79 milli-volts. Based on a 10 volt signal, this equates to +/-0.8% ELFS.
However, Calculation PA79-219-00767GE Revision 1 converted all error terms to units ofdecades because the device provides a linear output signal with respect to decades. Based on a 10 linear decade scale, the +/- 0.8% ELFS drift error was converted to +/- 0.08 decades error. Reference to decades within Calculation PA79-219-00767GE only refers to units and not a logarithmic value.
The calculated value ofdrift conservative given none ofthe four instruments required any readjustment during the period oftime between January 2005 and July of2007.
The upper trip setpoint limit is 7.413XI0-s % power. The setpoint must be left below this value based on the Technical Specification Allowable Value of 1.0X1O'4 %
power.
Page 40f14
Calculation No. ZPM_DRIFT-04260I2, Rev. 1 3.0 DESIGN INPUTS & REFERENCES 3.1 Design Inputs 3.1.1 SP-M2-EE-0003, Rev 0, Guidelinesfor Impact Evaluation of24-Month Fuel Cycle on Technical Specification Surveillancesfor Millstone Unit 2 3.1.2 Surveillance Procedure SP2403GA "RPS Channel "A" Bistable Trip Test" Rev 2 Chg 5 3.1.3 Surveillance Procedure SP2403GB "RPS Channel "B" Bistable Trip Test" Rev 2 Chg 5 3.1.4 Surveillance Procedure SP2403GC "RPS Channel "C" Bistable Trip Test" Rev 2 Chg 6 3.1.5 Surveillance Procedure SP2403GD "RPS Channel "D" Bistable Trip Test" Rev 2 Chg 6 3.1.6 Surveillance Procedure SP2401BBI "Channel "A" Wide Range Monitor Start-up Functional Test" Rev 1 Chg 3.
3.1.7 Surveillance Procedure SP2401BB2 "Channel "B" Wide Range Monitor Start-up Functional Test" Rev 1 Chg 4.
3.1.8 Surveillance Procedure SP2401BB3 "Channel "c" Wide Range Monitor Start-up FunCtional Test" Rev I Chg 4.
3.1.9 Surveillance Procedure SP2401BB4 "Channel "D" Wide Range Monitor Start-up Functional Test" Rev 1 Chg 5.
3.1.10 Surveillance Procedure SP2401BCl "Channel "A" Wide Range Monitor Calibration" Rev 1 Chg3.
3.1.11 Surveillance Procedure SP240nlC2 "Channel "B" Wide Range Monitor Calibration" Rev 1 Chg4.
3.1.12 Surveillance Procedure SP2401BC3 "Channel"c" Wide Range Monitor Calibration" Rev 1 Chg 3.
3.1.13 Surveillance Procedure SP2401BC4 "Channel"D" Wide Range Monitor Calibration" Rev 1 Chg6.
3.1.14 Calculation PA97-219-00676GE Rev 1, Millstone Unit 2 Wide Range Neutron Flux Channel Loop Uncertainty.
3.1.15 DOE Research and Development Report No. WAPD-TM-1292, February 1981, Statisticsfor Nuclear Engineers and Scientists Part 1.' Basic Statistical Inference.
3.1.16 American National Standard NI5.15-1974,Assessment ofthe Assumption ofNormality (Employing Individual Observed Values) 3.1.17 ISA-RP67.04.02-2000 "Methodologiesfor the Determination ofSetpointsfor Nuclear Safety RelatedInstrumentation" Page 5 of 14
Calculation No. ZPM_DRIFI'-04260I2, Rev. 1 4.0 ASSUMPTIONS 4.1.1 The data derived from the surveillance procedures constitute a random sample ofthe population ofpossible values ofdrift from like instruments.
4.1.2 The electronics installed in the Wide Range Monitors are typical of all electronics ofthe same manufacturer and model numbers. Therefore, data may be pooled withoutfurther analysis.
4.1.3 It is important to note that none ofthe instruments required recalibration. In terms of real drift, none ofthe affected instrument channels drifted beyond 0.269 % ELFS from the period ofJanuary 2005 to July of2007. However, for purposes ofadded conservatism, each successive calibration interval was assumed as a unique data point with no credit for non~adjustmentofthe instrument setpoint.
I I
II II I
I j
I Page 60f14
Calculation No. ZPM_DRIFT-04260I2, Rev. 1 5.0 METHOD OF CALCULATION In order to calculate bounding drift values for a 92 day surveillance interval, the methods ofReference 3.1.1 were employed. Plant historical data were tabulated and analyzed.
Historical surveillance test and calibration data was collected for the applicable instrumentation and entered into an ExcelTM spreadsheet. Statistical analysis ofthe data was performed using various functions within Excel'.
A linear regression analysis ofthe data was performed to determine if drift is time dependent. The data were tested for normality, and estimates ofthe bounding values of drift were determined using the methods for normal distributions. Scatter plots and histograms were prepared to assist in visualization ofthe data.
5.1 Instrument Block Diagram Figure I is a diagram ofa typical Wide Range Nuclear Instrumentation channel. The scope ofdrift analysis in this calculation pertains to the Zero Power Mode Bypass bistable. The current setpoint for the Zero Power Mode Bypass removal function is 9.4 X 10-5 % reactor power.
Indicator I
I I
I CJ-ZPM Bistable output toRPS Fission Chamber Preamplifier Signal Processor Figure 1: Wide Range Instrumentation Channel Block Diagram 5.2 Zero Power Mode Bistable Calibration/Functional Check The identified surveillance procedures (References 3.1.2 through 3.1.13) verify the bistable trip setting ofthe Zero Power Mode Bypass. The setpoint is verified to fall within an acceptance range of7.1 X 10-5to 1.2 X 10-4 % reactor power.
From the completed surveillance tests, drift values can be typically obtained by subtracting "as-found" surveillance values from the "as-left" values from the preceding surveillance test. The drift values obtained are for the period oftime between the two surveillance dates. The twelve surveillance procedures effectively verify the Zero Power Page 7 of!4
Calculation No. ZPM_DRIFT-04260I2, Rev. 1 Mode Bypass bistable setting using the same methodology. As a result, the calibration interval for each channel will be based on the period oftime between each successive instrument check, whether it was verified through the calibration surveillance, functional test surveillance or the bistable trip test surveillance procedure.
5.3 Input Data The historical calibration data in the Appendix constitute the input data for this calculation.
The data was derived from surveillance records which were completed over the period from January of2005 to July of2007. The associated workorders have been identified for each completed surveillance.
5.4 Spreadsheet Calculations Microsoft Excel', version 9.0, for Windows 2000 was used to perform the statistical calculations and prepare the scatter plots and histograms for this calculation. The function, AVERAGE, was used to calculate the sample mean, the function, STDEV, was used to calculated the sample standard deviation and the functions, SLOPE and INTERCEPT, were used to calculate the slope and intercept ofthe best-fit straight line for the regression analyses.
The computations performedto the full precision ofExcel'are presented in this calculation rounded to two decimal places in most cases. Verification by hand calculator using the rounded values may result in slightly different results due to round-off errors.
6.0 BODY OF CALCULAnON 6.1 Drift Analysis The identified surveillance procedures simulate an input signal through operation ofa potentiometer on the Wide Range Nuclear Instrwnentation drawers. The "as-found" and "as-left" were observed on the displays and recorded. The loop drift was then determined by subtracting the "as-left" values from the "as-found" vallles.
Page 8 of 14
Calculation No. ZPM_DRlFT-04260I2, Rev. 1 6.2 Historical Data Compilation Drift Drift Drift Drift No Days
%ELFS No Days %ELFS No Days
%ELFS No Days
% ElFS 1
1
-0.269 39 15 0.000 77 28 0.000 115 36 0.000 2
3
-0.269 40 15 0.000 78 28 0.000 116 37 0.000 3
4
-0.269 41 15 0.000 79 28 0.000 117 37 0.000 4
7
-0.269 42 16 0.000 80 28 0.000 118 38 0.000 5
9
-0.269 43 17 0.000 81 28 0.000 119 38 0.000 6
13
-0.269 44 17 0.000 82 28 0.000 120 38 0.000 7
15
-0.269 45 17 0.000 83 28 0.000 121 38 0.000 8
15
-0.269 46 17 0.000 84 28 0.000 122 38 0.000 9
15
-0.269 47 19 0.000 85 28 0.000 123 38 0.000 10 19
-0.269 48 19 0.000 86 28 0.000 124 38 0.000 11 25
-0.269 49 19 0.000 87 28 0.000 125 42 0.000 12 28
-0.269 50 19 0.000 88 28 0.000 126 42 0.000 13 28
-0.269 51 19 0.000 89 28 0.000 127 42 0.000 14 34
-0.269 52 19 0.000 90 28 0.000 128 42 0.000 15 a
0.000 53 19 0.000 91 28 0.000 129 51 0.000 16 1
0.000 54 19 0.000 92 28 0.000 130 51 0.000 17 1
0.000 55 19 0.000 93 29 0.000 131 51 0.000 18 1
0.000 56 20 0.000 94 29 0.000 132 55 0.000 19 1
0.000 57 21 0.000 95 29 0.000 133 64 0.000 20 1
0.000 58 21 0.000 96 31 0.000 134 64 0.000 21 2
0.000 59 21 0.000 97 31 0..000 135 64 0.000 22 2
0.000 60 21 0.000 98 31 0.000 136 64 0.000 23 3
0.000 61 22 0.000 99 31 0.000 137 1
0.269 24 4
0.000 62 22 0.000 100 31 0.000 138 4
0.269 25 7
0.000 63 23 0.000 101 31 0.000 139 7
0.269 26 7
0.000 64 23 0.000 102 31 0.000 140 15 0.269 27 7
0.000 65 23 0.000 103 31 0.000 141 18 0.269 28*.
7
. 0.000 66 23 0.000 104
- .
- 31
.. 0.000 142 20 0.269 29 9
0.000 67 25 0.000 105 31 0.000 143 21 0.269 30 11 0.000 68 27 0.000 106 31 0.000 144 28 0.269 31 11 0.000 69 27 0.000 107 33 0.000 145 28 0.269 32 11 0.000 70 27 0.000 108 33 0.000 146 33 0.269 33 13 0.000 71 27 0.000 109 33 0.000 147 33 0.269 34 15 0.000 72 27 0.000 110 33 0.000 148 37 0.269 35 15 0.000 73 27 0.000 111 33 0.000 149 37 0.269 36 15 0.000 74 27 0.000 112 34 0.000 150 41 0.269 37 15 0.000 75 28 0.000 113 34 0.000 38 15 0.000 76 28 0.000 114 34 0.000 Table 1: WR-Log AID Drift Data Table 1 presents the results ofthe drift determination, described above. The drift data are in order ofincreasing values of drift.
Page 9 of 14
Calculation No. ZPM_DRlFT-04260I2, Rev. I 6.3 Tests for Outliers There were no suspected outliers in the results. Therefore, this test was not perfonned and no data points were removed from the sample population.
6.4 Data Plots The scatter plots and histograms, Figures 2 and 3, provide a graphical presentation ofthe drift data. These graphs were created using ExcelTM.
WR-LOG-AlD Drift Data 0.300 0.200 iii' 0.100
...J W
r;.
0.000 II::
0
-0.100
-0.200
-0.300
~
10 20 30 40 50 60 70 Surveillance Interval (days)
Figure 2: Scatter Plot - WR-LOG-A/D Drift Data A visual inspection ofthe scatter plot indicates no apparent connection between the magnitude and the duration ofthe surveillance interval. A linear regression analysis ofthe data will confInn or deny the visual observation that the magnitude ofdrift is not dependent onthe duration between surveillances.
WR.LOG-A/B/C/D 16 y------~--------------------..,
14 12 1;' 10 c
~
B a..
ot 6
4 2
0+-'----
-0.269 Drlfll% ELFS)
Figure 3: Histogram - WR-LOG-A1D Drift Data 0.269 The histogram does not appear to be from a normal distribution. A D' Test shall confino or deny the normality ofthe drift data.
Page 10 of!4
Calculation No. ZPM_DRIFT-0426012, Rev. 1 65 Tests for Normality Due to the sample population being greater than 50 data points, the D' Test was performed. (Reference 3.1.16).
D'Test First, T was computed using the following formula:
T =f[i-n+l};
- =)
2 where:
n is the number ofvalues in the sample Xi represents the values in the sample arranged in increasing order Then the D' test statistic was calculated:
D,=T S
where:
82
=:: (n-l)s2 and S2 is the unbiased estimate ofthe population variance
..~. r*j The mean and standard deviati~u.wculate as follows:
LXi MeanX=--
n where:
" " :' ~
(,
Stand.ard deviation = s ~," f (XI - xi n-l i~)
Xi represents the values in the sample arranged in increasing order n is the number ofvalues in the sample Using Excel, the standard deviation, s, calculates to 0.116 and the mean is 0.0.
Therefore, the variance S2 calculates to 0.0135.
Using the above formula, with n is equal to150 data samples, 82 =(150-1).0135 =2.0 Page 11 of14
Calculation No. ZPM_DRIFT-04260I2, Rev. 1 The test statistic, D' was then compared to the critical values from Table 5 ofReference 3.1.16 at a significance level, a =0.02 (P = 0.01 and 0.99).
The T results, calculated by Excel', are:
T = 512.2 512.2 Therefore, D'=
r;,-;:; = 362.2
.....2.0 From Reference 3.1.16, the critical values are 505.6 at P = 0.01 and 526.4 at P =0.99. The test statistic, D', does not lie between the critical values, so the hypothesis ofa nonna! distribution is rejected at a = 0.02.
6.6 Bounding Values ofDrift For a non-nonnal distribution, the proportion ofthe population exceeding assumed bounds can be determined from Reference 3.1.1.
Pu =
(x +I)Fa/2;2(X+I).2(n-x)
(n - x) + (x + I)Fa/2;2(X+l),2(n-x)
Assumed upper and lower bounds (pass/fail criterion) are selected as +/- 0.269 % ELFS.
Then, X = 0, and the above equation becomes:
F:
3.781 Pu =
0.025;2,150
= 0.025 150+ Fa.025;2,300 150+ 3.781 Thus, 97.5% ofthe population will lie within a bound of+/- 0.269 % ELFS.
- ~~~
.,.:.(~:~
- ~~': L;
'I~
-:'~.
It is important to note:her.e that none ofthe instruments required recalibration. Therefore,
'i>!'
in tenns of.re~tdrift,non~oftheaffected iI1~~rument channels drifted beyond 0.269;~.'i.'..
ELFS froin the period'ofJanuary 2005 to July of2007. However, for purposes of added conservatism, each successive calibration interval was assumed as a unique data point with no credit for non-adjustment ofthe instrument setpoint.
6.7 Linear Regression Analysis ofDrift As stated earlier, examination ofthe scatter plot shows no apparent time dependency in the drift. Linear regression analyses ofthe absolute values ofthe data, perfonned by Excel'using the SLOPE and INTERCEPT functions, provide the slope and intercept of the best-fit straight line.
Slope = -1.453X1 0.3 Intercept = 0.086 The negative slope ofthe regression line for the drift data confinn that the drift does not increase with time. This is further supported by the fact that the instrument channels in question did not require any readjustment for the identified surveillances from January 2005 to July 2007. Further, the Zero Power Mode Bypass auto removal setpoint for Page 12 of14
Calculation No. ZPM_DRIFT-04260I2, Rev. 1 instrument channels WR-LOG-C and WR-LOG-D did not move at all from the period of in question.
Therefore, based on the above results, the bounding values ofdrift for a 92 day surveillance interval for the Zero Power Mode bypass auto removal function is +/- 0.269 %
ELFS.
Bound = +/- 0.269 % ELFS This value is less than the +/- 0.8 % ELFS drift term assumed in calculation PA79-2l9-00767GE Revision I (Reference 3.1.14).
Calculation PA79-2l9-00767GE Revision I converted error terms from % offull scale(ELFS) to decades. This was done by simply taking the % full scale error and multiplying by the total'number ofdecades for the instrument. This instrument has 10 decades. A drift term of+/- 0.08 decades equates to an error term of.08/10*100 % =0.8 %
ELFS. It is important to note that references to decades within Calculation PA79-2I9-00767GE Revision Ido not refer to an actual logarithmic number but that ofunits. The Wide Range Nuclear Instrumentation provides a linear output signal in terms ofdecades, with an indicated scale of 10 full decades. The vendor does provide error terms in %
ELFS, however, Calculation PA79-219-00767GE Revision 1 converted % ELFS to units ofdecades because the indication is in terms ofdecades:
6.8 Setpoint Derivation The IXI0-4 % reactor power Tech Spec value is considered an allowable value and not an analytical limit. The Zero Power Mode bypass setpoint is not modeled in the plant safety
- analysis and is not considered an analytical limit. For purposes ofthis c~lculation, the
- L, HI?per t1}P. setpoint limit shall be calculated by subtracting from the allo~~~lt= value of.
'. 1\\)'.OX10
% reactor power the root ofthe sum ofthe squares ofthe expeQt~'errors whIch
.,1' would be seeQ. during,the calibration process. The expected uncertainty,terms. include-,:
, Rack Drift (RD), Rack Calibration Accuracy (RCAzp) assoCiated'vith the zero Power'"
Mode Function and Measurement and Test Equipment (MTE). These terms have been derived from Calculation PA79-2l9-00767GE Revision 1 (Reference 3.1.14). They are as follow:
RCAzp = +/- 0.1 0 decades RD = +/- 0.08 decades It is important to note this drift value is much more conservative than the expected drift term calculated within this calculation.
MTE =+/- 0.01 decades Converting the above terms to ELFS yields the following:
RCAzp = +/- 0.01 % ELFS RD =+/- 0.008 % ELFS MTE = +/- 0.001 % ELFS Total Expected Uncertainty during performance ofthe Zero Power Mode Bypass function surveillance (Surveillance Error = SVerror) would be calculated as follows:
Page 13 of 14
Calculation No. ZPM_DRIFT-04260I2. Rev. 1 SVerror = +/- ~(.01)2 +(.008)2 +(.001)2 =+/- 0.013 % ELFS The Allowable Value (AV) for the Zero Power Mode Bypass function is again 1.0XI0-4
% reactor power. Reference 3.17 provides an accepted method for converting between process units (% reactor power) and % ELFS.
FACTOR = Io+/-[%ELFSXIOlaldecades>>)
FACTOR = 10+/-[*OI3)(10>>) = I0+/-0.l3 Max Factor = 10+0.13 = 1.349 Min Factor =
10-0.13 = 0.7413 The expected error around a I.OXI0-4 allowable value is as follows:
Plus Error = (AV)(Max Factor) =(I.OXI 0-4)(1.3490) = 1.349XI0-4 %
Minus Error = (AV)(Min Factor) =(1.0XI0-4)(O.7413) = 7.413XlO-s %
Because the setpoint must occur below the allowable value of 1.0XI0-4. the setpoint needs to be set below 7.413XlO-5.
Allowable Value As-found
{
As-left trip
. ----------- Actual field setpoint setpoint band Figure 4: Upper Trip Setpoint Derivation 7.0 DESIGN VERIFICATION Design verification was done by means ofa full design review in accordance with Design Control Manual, Chapters 4 and 5. A copy ofthe Calculation Review Comment and Resolution Form is included as an attachment.
Page 14 of 14
Calculation No. ZPM_DRlFT-0426012, Rev. 1 Appendix A Historical Surveillance Data WR-LOG-A, WR':LOG-B, WR-LOG-C & WR-LOG-D Page Al
- ..___ ~~_____,~___ ~_~,......~_,_~~~~_........_,.. _~__"..*,._____..........._.~~~~_,___."",.................,~~*"~,rn~~~_*
I WR-LOG-A Surveillance Data J
Calculation No. ZPM_DRIFT-04260I2, Rev. 1 Surveillance Completion AS FOUND AS LEFT DRIFT Factor DRIFT Absoulte Procedure Work Order Date
% Power
% Power Real
%ELFS DAYS Drift SP2401GA M20702383 07/19/2007 1.00E-04 1.00E-04 SP2401BC1 M20600025 07/16/2007 9.40E-05 9.40E-05
-S.00E-06 0.9400
-0.269 3
0.269 SP2401GA M20701671 06/28/2007
','-. 1.00E-04 1.00E-04 6.00E-06 1.0638 0.269 18 0.269 SP2401GA M20700842 06/07/2007 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 21 0.000 SP2401GA M20700061 05/04/2007 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 34 0.000 SP2401GA M20609438 03127/2007 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 38 0.000 SP2401GA M20607927 02127/2007 1.00E-04 1.00E-D4 O.OOE+OO 1.0000 0.000 28 0.000 SP2401GA M20607014 0210212007 1.00E-04 1.00E-D4 O.OOE+OO 1.0000 0.000 25 0.000 SP2401GA M20606247 01116/2007 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 17 0.000 SP2401GA M20605502 12105/2006 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 42 0.000 SP2401BB1 M20504175 11/16/2006 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 19 0.000 SP2401GA M20604755 11/15/2006 1.00E-04 1.00E-D4 O.OOE+OO 1.0000 0.000 1
0.000 SP2401GA M20603026 09/1212006 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 64 0.000 SP2401GA M20602006 08/15/2006 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 28 0.000 SP2401GA M20601062 07/18/2006 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 28 O~OOO SP2401GA M20600096 06/20/2006 9AOE-05 9AOE-OS
-6.00E-06 0.9400
-0.269 28 0.269 SP2401GA M20S12070 06105/2006 1.00E-04 1.00E-04 6.00E-06 1.0638 0.269 15 0.269 SP2401GA M20S11380 05/08/2006 9.40E-05 9AOE-OS
-6.00E-06 0.9400
-0.269 28 0.269 SP2401BB1 M20602053 04/05/2006 1.00E-04 1.00E-04 6.00E-06 1.0638 0.269 33 0.269
. SP2401GA M2051 0621 03/29/2006 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 7
0.000 SP2401GA M20509769 03/06/2006 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 23 0.000 SP2401BB1 M20402S80 0212312006 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 11 0.000 SP2401BC1 M20406730 02114/2006 9AOE-OS 9AOE-DS
-B.OOE-Oe 0.9400
-0.269 9
0.269 SP2401GA M20509024 02107/2006 1.00E-04 1.00E-04 6.00E-OS 1.0638 0.269 7
0.269 SP2401GA M20S08223 01/05/2006 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 33 0.000 SP2401GA M20507476 12109/2005
- . 1~t>OE-04 1.00E-04 O.OOE+OO 1.0000 0.000 27 0.000 SP2401GA M20506707 11/08/2005 1*,OOE-04 1.00E-04 O.OOE+OO 1.0000 0.000 31 0.000 SP2401GA M20505140 10/20/2005 9AOE-OS 9AOE-OS
-6.00E-06 0.9400
-0.269 19 0.269 SP2401GA M20503476 09/13/2005 1.00E-04 1.00E-04 6.00E-06 1.0638 0.269 37 0.269 SP2401GA M20502597 08/29/2005 9AOE-05 9.40E-05
-6.00E-06 0.9400
-0.269 15 0.269 SP2401GA M20501552 08/01/2005 1.00E-04 1.00E-04 6.00E-06 1.0638 0.269 28 0.269 SP2401GA M20500102 06/24/2005 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 38 0.000 SP2401GA M20412412 OS/24/2005 1.00E-04 1.00E-04 O.OOE+OO 1.0000 0.000 31 0.000 SP2401GA M20411407 OS/23/2005 9AOE-05 9AOE-OS
-6.00E-06 0.9400
-0.269 1
0.269 SP2401BB1 M20314121 05/19/2005 1.00E-04 1.00E-04 6.00E-06 1.0638 0.269 4
0.269 SP2401GA M2041 0435 03129/200S 1.00E-04 1.00E-Q4 O.OOE+OO 1.0000 0.000 S1 0.000 SP2401GA M20409365 03/14/2005 9AOE-OS 9.40E-05
-B.00E-06 0.9400
-0.269 15 0.269 SP2401GA M20408330 02114/2005 9AOE-05 9AOE-DS O.OOE+OO 1.0000 0.000 28 0.000 SP2401GA M20407340 01/04/2005 1.00E-04 1.00E-04 6.DOE-06 1.0638 0.269 41 0.269 PageA2
I WR-LOG-B Calculation No. ZPM_DRIFT-0426012, Rev. I Surveillance Data Surveillance Completion AS FOUND AS LEFT DRIFT Factor DRIFT Absoulte Procedure Work Order Date
% Power
% Power Real
%ELFS DAYS Drift SP2401GB M20702384 07/19/2007 9.40E-oS 9.40E-OS SP2401BC2 M20S12632 06/2812007 9.40E-OS 9AOE-OS O.OOE+OO 1.0000 0.000 21 0.000 SP2401GB M20701672 06/28/2007 9.40E-OS 9.40E-05 O.OOE+OO 1.0000 0.000 0
0.000 SP2401GB M20700843 06/07/2007 1.00E-04 1.00E-04 6.00E-D6 1.0638 0.269 21 0.269 SP2401GB M20700062 05/04/2007 9.40E-D5 9.40E-05
-a.00E-06 0.9400
-0.269 34 0.269 SP2401GB M20609439 03/27/2007 9AOE-05 9.40E-OS O.OOE+OO 1.0000 0.000 38 0.000 SP2401GB M20607928 02127/2007 1.00E-04 1.00E-04 6.00E~06 1.0638 0.269 28 0.269 SP2401GB M20607015 02/0212007 9.40E-OS 9.40E-0S
-6.00E-D6 0.9400
-D.269 25 0.269 SP2401GB M20606248 01/16/2007 9.40E-DS, 9.40E-OS O.OOE+OO 1.0000 0.000 17 0.000 SP2401GB M2060SS03 12105/2006
. g.40E-OS 9.40E-05 O.OOE+OO 1.0000 0.000 42 0.000 SP2401BB2 M20504176 11/16/2006
.!;l,'40E-05 9.40E-05 O.OOE+OO 1.0000 0.000 19 0.000 SP2401GB M20604756 11/15/2006 9.40E-D5 9.40E-05 O.OOE+OO 1.0000 0.000 1
0.000 SP2401GB M20603027 09/1212006 9.40E-D5 9.40E-OS O.OOE+OO 1.0000 0.000 64 0.000 SP2401GB M20602007 08/1S/2006 9.40E-05 9.40E-OS O.OOE+OO 1.0000 0.000 28 0.000 SP2401GB M20601063 07/18/2006 9.40E-oS 9.40E-OS O.OOE+OO 1.0000 0.000 28 0.000 SP2401GB M20600097 06/20/2006 9.40E-OS 9.40E-OS O.OOE+OO 1.0000 0.000*
28 0.000 SP2401GB M20512071 06/05/2006 9.40E-oS 9.40E-OS O.OOE+OO 1.0000 0.000 15 0.000 SP2401GB M20511381 05/08/2006 9.40E-OS 9.40E-05 O.OOE+OO 1.0000 0.000 28 0.000 SP2401BB2 M20602052 04/05/2006 1.00E-04 1.00E-04 6.00E.;06 1.0638 0.269 33 0.269 SP2401GB M20S10622 03/29/2006 9.40E-OS 9.40E-05
-a.00E-06 0.9400
-0.269 7
0.269 SP2401GB M20S09770 03/06/2006 9.40E-QS 9.40E-OS O.OOE+OO 1.0000 0.000 23 0.000 SP2401BB2 M20402581 02/2312006 9AOE-05 9.40E-05 O.OOE+OO 1.0000 0.000 11 0.000 SP2401GB M20S0902S 02/07/2006 9.40E-05 9.40E-OS O.OOE+OO 1.0000 0.000 16 0.000 SP2401BC2 M2040659S 01118/2006 1.00E~04 1.00E-Q4 6.00E-06 1.0638 0.269 20 0.269 SP2401GB M20508224 01/05/2006 9.40E-DS 9.40E-DS
~.00E-06 0.9400
-D.269 13 0.269 SP2401GB M20507477 12/09/2005 9.40E~05 9.40E-05 O.OOE+OO 1.0000 0.000 27 0.000 SP2401GB M20506708 11/08/200S 9.40E-OS 9.40E-OS O.OOE+OO 1.0000 0.000 31 0.000 SP2401GB M20505141 10/20/2005 9.40E~OS 9.40E-QS O.OOE+OO 1.0000 0.000 19
.0.000 SP2401GB M20503477 09/13/2005 1.00E*04 1.00E-04 6.00E-06 1.0638 0.269 37 0.269 SP2401GB M20502S98 08/29/2005 9.40E-DS 9.40E-DS
~.00E-06 0.9400
-0.269 1S 0.269 SP2401GB M205015S3 08/01/2005 9.40E-QS 9.40E-OS O.OOE+OO 1.0000 0.000 28 0.000 SP2401GB M20S00103 06/29/2005 9.40E-OS 9.40E-05 O.OOE+OO 1.0000 0.000 33 0.000 SP2401GB M20412413 05/24/2005 9AOE-05 9.40E-OS O.OOE+OO 1.0000 0.000 36 0.000 SP2401GB M20411408 OS/23/2005 1.00E-04 1.00E-04 6.00E-D6 1.0638 0.269 1
0.269 SP2401BB2 M20314122 OS/19/200S 9.40E-05 9.40E-05
-6.00E-06 0.9400
-0.269 4
0.269 SP2401GB M20410436 03/29/200S 9.40E-05 9.40E-05 O.OOE+OQ 1.0000 0.000 51 0.000 SP2401GB M20409366 03/14/2005 9.40E-DS 9.40E-DS O.OOE+OO 1.0000 0.000 15 0.000 SP2401GB M20408331 02114/2005 9AOE-QS 9AOE-05 O.OOE+OO 1.0000 0.000 28 0.000 SP2401GB M20407341 01/14/200S 9AOE-05 9.40E-OS O.OOE+OO 1.0000 0.000 31 0.000 f:i',~:H~i
~~>5 Page A3
~
._._-_._---~~-~_._-
---_.. ~----..~-~----~..~.- =~~~~~,~-=-~~-_.~--"'
Calculation No. ZPM DRIFT.04260I2, Rev. 1 I WR-LOG-D Surveillance Data I Surveillance Completion AS FOUND AS LEFT DRIFT Factor DRIFT Absoulte Procedure Work Order Date
% Power
% Power Real
%ELFS DAYS Drift SP2401GD M20702386 0711912007 9AOE-OS 9AOE-OS SP2401GD M20701674 06/28/2007 9.40E~05 9.40E-OS O.OOE+OO 1.0000 0.000 21 0.000 SP2401BC4 M20512601 06/26/2007 9AOE-05 9AOE-05 O.OOE+OO 1.0000 0.000 2
0.000 SP2401GD M20700845 06/07/2007 9.40E-05 9AOE-05 O.OOE+OO 1.0000 0.000 19 0.000 SP2401GD M20700064 05/04/2007 9.40E-05 9.40E-05 O.OOE+OO 1.0000 0.000 34 0.000 SP2401GD M20611796 03127/2007 9AOE-05 9AOE-05 O.OOE+OO 1.0000 0.000 38 0.000 SP2401GD M20610679 03/05/2007 9AOE-05 9.40E-05 O.OOE+OO 1.0000 0.000 22 0.000 SP2401GD M20609441 02102/2007 9AOE-05 9AOE-05 O.OOE+OO 1.0000 0.000 31 0.000 SP2401GD M20607930 01/16/2007 9AOE-05 9AOE-OS O.OOE+OO 1.0000 0.000 17 0.000 SP2401GD M20607017 12105/2006 9AOE-05 9AOE-OS O.OOE+OO 1.0000 0.000 42 0.000 SP2401BB4 M20504178 11/16/2006 9AOE-05 9AOE-OS O.OOE+OO 1.0000 0.000 19 0.000 SP2401GD M20606250 11/15/2006 9AOE-05 9AOE-05 O.OOE+OO 1.0000 0.000 1
0.000 SP2401GD M206047S8 09/12/2006 9AOE-OS 9AOE-OS O.OOE+OO 1.0000 0.000 64 0.000 SP2401GD M20603946 08/14/2006 9AOE-D5 9AOE-OS O.OOE+OO 1.0000 0.000 29 0.000 SP2401GD M20603029 07/18/2006 9AOE-05 9AOE-OS O.OOE+OO 1.0000 0.000 27 0.000 SP2401GD M20602009 06/20/2006
- ~:i9,~~05 9AOE-QS O.OOE+OO 1.0000 0.000 28 0.000 SP2401GD M2060106S 06/05/2006 o".;.,oE 05 9AOE-OS O.OOE+OO 1.0000 0.000 15 0.000 SP2401GD M20600099 05/08/2006 SAOE-QS 9AOE-OS O.OOE+OO 1.0000 0.000 28 0.000 SP2401BB4 M20602049 04/05/2006 9AOE-05 9AOE-05 O.OOE+OO 1.0000 0.000 33 0.000 SP2401GD M20S12073 03/29/2006 9AOE-05 9AOE-05 O.OOE+OO 1.0000 0.000 7
0.000 SP2401GD M20511383 03/06/2006 9.40E-05 9AOE-05 O.OOE+OO 1.0000 0.000 23 0.000 SP2401GD M20S10624 02107/2006 9.40E-05 9AOE-OS O.OOE+OO 1.0000 0.000 27 0.000 SP2401BC4 M20406567 01/18/2006 9AOE-05 9AOE-Q5 O.OOE+OO 1.0000 0.000 20 0.000 SP2401GD M20509772 01/05/2006 9AOE-05 9AOE-05 O.OOE+OO 1.0000 0.000 13 0.000 SP2401GD M20509027 12109/2005 9AOE-05 9AOE-OS O.OOE+OO 1.0000 0.000 27 0.000 SP2401GD M20508226 11/08/2005 9.40E-05 9.40E-05 O.OOE+OO 1.0000 0.000 31 0.000 SP2401GD M2050S143 10/2012005 9AOE-05 9AOE-05 O.OOE+OO 1.0000 0.000 19 0.000 SP2401GD M20503479 09/1312005 9AOE-05 9.40E-05 O.OOE+OO 1.0000 0.000 37 0.000 SP2401GD M20502600 08/29/2005 9AOE-05 9AOE-05 O.OOE+OO 1.0000 0.000 15 0.000 SP2401GD M20501555 08/01/2005 9.40E-05 9AOE-05 O.OOE+OO 1.0000 0.000 28 0.000 SP2401GD M20500105 06/24/2005 9.40E-05 9.40E-OS O.OOE+OO 1.0000 0.000 38 0.000 SP2401GD M20412415 05/26/2005 9.40E-05 9AOE-OS O.OOE+OO 1.0000 0.000 29 0.000 SP2401GD M20411410 05/23/2005 9AOE-05 9.40E-05 O.OOE+OO 1.0000 0.000 3
0.000 SP2401GD M20410438 03/29/2005 9.40E-OS 9.40E-QS O.OOE+OO 1.0000 0.000 55 0.000 SP2401GD M20409368 03/14/2005 9AOE-05 9AOE-OS O.OOE+OO 1.0000 0.000 15 0.000 SP2401GD M20408333 02114/2005 9.40E-05 9.40E-05 O.OOE+OO 1.0000 0.000 28 0.000 SP2401GD M20407343 01/14/2005 9.40E-05 9AOE-05 O.OOE+OO 1.0000 0.000 31 0.000 PageA5
~~_.._-_.-.-- ---------------_._--~-----_
~ At CalculatIon RevIew Comment and Resolution Farm (Sheet 1of )
Calculation Number:
ZPM~DRIFT-0426012 Revision:
_1_
Calculation
Title:
Zero Power Mode Drift Analysis in Support of LBDeR 06-MP2~036 Calc. Originator:
Reviewer (PRINT):
Response
Added Added Normal convention is to use Xi, not Xi. therefore, Xi was changed to Xi. Corrected standard deviation formula. 82 calculates to 0.013456. Rounded up for conservatism.
These are precision errors between hand calculations and Excel.
Numbers changed as requested.
Incorporated Added Incorporated Added Coinrilents
~-..
(si nature signifies all comments have been resolved to your satisfaction) 3'd paragraph: Change decades to %ELFS in first sentence. Add: Note.
Calculation... to second sentence.
Define SV.
Add AV after Allowable Value. MAX FACTOR = 1.349+1; MIN FACTOR = 1.349.
1 =
0.7413. Use arenthesls In lieu of asterisks.
S2: correct S2 used. T =512.2 according to my calculations. D'" 352.2 accordingly.
Add specific reason for use of ISA Standard.
Explilin that purpose of ReVision 1 is to express drift in %ELFS instead of decades.
2nd paragraph-add: This value is less thari the +/- 0.8% ELFS drift term...
,~~
Under D' Test: Xi should be~.
Formula for standard deviation is not correct. Check statistics formula reference. s = 0.135 ~ceording to my calculations.
This form Is intended to document significant comments and their resolutions. Typographical errors and other editorial recommendations may be marked up in the calculation text and presented to the originator Review Typ~
Dlnterdiscipline
!:8Jlndependent Item Page/Section 1IExecutive Summary 2
411.0 3
412.0 4
11/6.5 5
12/6.5 6
13/6.7 7
13/6.8 8
1416.8 Reviewer (SIGN)
DCM FORM 5-1C Rev. 7 Page 1of 1