ML072910021

Instrumentation Technical Specification Changes, Calculation Zpm Drift-0426012, Rev. 0, Zero Power Mode Drift Analysis in Support of LBDCR 06-MP2-036.

ML072910021
Person / Time
Site:	Millstone
Issue date:	09/14/2007
From:	Dominion Nuclear Connecticut
To:	Office of Nuclear Reactor Regulation
References
06-0841B, 06-MP2-036 ZPM DRIFT-0426012, Rev 0
Download: ML072910021 (25)

Text

Serial No. 06-0841B Docket No. 50-336 ATTACHMENT 2 INSTRUMENTATION TECHNICAL SPECIFICATION CHANGES CALCULATION ZPM DRIFT-0426012, REV 0. DATED 9/14107 ZERO POWER MODE DRIFT ANALYSIS IN SUPPORT OF LBDCR 06-MP2-036 DOMINION NUCLEAR CONNECTICUT, INC.

MILLSTONE POWERSTATION UNIT 2

Approved 11/17/03 Effective 11/21/03 Ann CALCULATION TITLE PAGE Total Numiber of Pages: 22 TITLE ZPM DRIFT-0426012 0 Zero Power Mode Drift Analysis in Support of LBDCR 06-MP2-036 CALCULATION No. Revision No.

NA N/A VENDOR CALCULATION No. Revision No.

N/A VENDOR NAME NUCLEAR INDICATOR: 50.59 Evaluation or Screen Calc. Supports Calc. Supports Attached DCR/MMOD/EE? Other Process?

OCAT1 []'RWQA [-SBOQA

-IFPQA EI-ATWSQA EINON-QA SE]YES ONO INCORPORATES: LBDCR 06-MP2-036 CCN NO: AGAINST REV. Ref. No. Reference Executive Summary LBDCR 06-MP2-036 is proposing extending the surveillance requirement for the auto removal of the Zero Power Mode Bypass function from a monthly interval to once within 92 days of a reactor startup. To support the proposed surveillance extension for the auto removal of the 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 of 24 months. The drift analysis will verify that extending the existing monthly functional check to once within 92 days of a reactor startup will not result in actual equipment drift beyond the assumed values within calculation PA79-219-00767GE. Also, this calculation determines the upper trip setpoint limit for the auto removal of the Zero Power Mode Bypass function.

Approvals (Print & Sign Name)

Preparer: 4 M' Date: q10 7 Interdiscipline Reviewer: N/A Discipline: Date:

Interdiscipline Reviewer: N/A Discipline: Date:

Independent Reviewer: Date:

Engineering Approver.:~ Date-.

Installation Verification El Calculation represents the installed configuration and approved licensing condition (Calculation of Record)

El N/A does not affect plant configuration (e.g., study, hypothetical analysis, etc.)

Preparer/Designer Engineer: (Print and Sign) Date:

DCM 05-1A Rev. 011 Page 1 of I

Approved 9/22/04 Effective 9/27/04 PassPort DATABASE INPUTs Page 2 Calculation Number: ZPM DRIFT-0426012 Revision: 0 Vendor Calculation Number/Other: N/A Revision: N/A CCN # N/A Cale Voided: El Yes 0 No Superseded By: N/A Supersedes Calc: N/A Discipline (Up to 10) I,N Unit Project Reference Component Id Computer Code Rev..No./

(M I, M2, M3) (EWA,*Ror MMOD) ,. .Level No.

M2 N/A WR-LOG-A Microsoft Excel 9.0 WR-LOG-B

__WR-LOG-C

.WR-LOG-D MEL CODES* I Structure System Component Reference Calculation Rev CCN No.

AB RPS LOP PA79-219-00767GE I N/A

• The codes required must be alpha codes designed for structure, system and component.

NOTE: Avoid multiple item references on a line, e.g., LT 1210 A-D requires four separate lines. -

Reference Drawing Sheet Rev. No.

N/A Comments:

Referenced By Calculation Impact Impact AR Reference/Calc Change Ref.

Y N N/A DCM 05-00B Rev 009-01 Page I of I

Calculation No. ZPMDRIFT-0426012, Rev. 0 TABLE OF CONTENTS Section & Title Page COVER PAGE I PASSPORT DATABASE INPUTS 2 TABLE OF CONTENTS 3 1.0 PURPOSE 4 2.0

SUMMARY

OF RESULTS 4

3.0 REFERENCES

/DESIGN INPUTS 5 4.0 ASSUMPTIONS 6 5.0 METHOD OF CALCULATION 7 6.0 BODY OF CALCULATION 8 7.0 DESIGN VERIFICATION 14 8.0 ATTACHMENTS Appendix A - Historical Surveillance Data - WR-LOG-A,B,C & D Al-A5 DCM Form 5-IC A6 & 7 DCM Form 5-1D A8 TOTAL 22 pgs Page 3 of 14

Calculation No. ZPMDRIFT-0426012, Rev. 0 1.0 PURPOSE The purpose of this calculation is to estimate 92 day drift values for the auto removal of the Zero Power Mode Bypass function. LBDCR 06-MP2-036 is proposing extending the surveillance requirement for the auto removal of the 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 of the 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 of 24 months. The drift analysis will verify that extending the existing monthly functional check to once within 92 days of a 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 of the Zero Power Mode Bypass function.

2.0

SUMMARY

OF RESULTS The bounding values of drift 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 = +/- 0.0269 decades This value is less than the +/- 0.08 decades drift term used in calculation PA79-219-00767GE Revision 1. This value is conservative given none of the four instruments required any readjustment during the period of time between January 2005 and July of 2007.

The upper trip setpoint limit is 7.413X10 5 % power. The setpoint must be left below this value based on the Technical Specification Allowable Value of 1.OX1 04 %

power.

Page 4 of 14

Calculation No. ZPMDRIFT-0426012, Rev. 0 3.0 DESIGN INPUTS & REFERENCES 3.1 Desipn Inputs 3.1.1 SP-M2-EE-0003, Rev 0, Guidelinesfor Impact Evaluation of 24-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 SP2401BB1 "Channel "A" Wide Range Monitor Start-up FunctionalTest" Rev I Chg 3.

3.1.7 Surveillance Procedure SP240 IBB2 "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 FunctionalTest" Rev 1 Chg 4.

3.1.9 Surveillance Procedure SP2401 BB4 "Channel "D" Wide Range Monitor Start-up FunctionalTest" Rev I Chg 5.

3.1.10 Surveillance Procedure SP2401 BC 1 "Channel "A " Wide Range Monitor Calibration" Rev I Chg 3.

3.1.11 Surveillance Procedure SP2401 BC2 "Channel "B " Wide Range Monitor Calibration" Rev I Chg 4.

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 I Chg 6.

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 andScientists Part 1: Basic StatisticalInference.

3.1.16 American National Standard N 15.15-1974, Assessment of the Assumption ofNormality (Employing Individual Observed Values)

Page 5 of 14

Calculation No. ZPMDRIFT-0426012, Rev. 0 4.0 ASSUMPTIONS 4.1.1 The data derived from the surveillance procedures constitute a random sample of the population of possible values of drift from like instruments.

4.1.2 The electronics installed in the Wide Range Monitors are typical of all electronics of the same manufacturer and model numbers. Therefore, data may be pooled without further analysis.

4.1.3 It is important to note that none of the instruments required recalibration. In terms of real drift, none of the affected instrument channels drifted beyond 0.0269 decades from the period of January 2005 to July of 2007. However, for purposes of added conservatism, each successive calibration interval was assumed as a unique data point with no credit for non-adjustment of the instrument setpoint.

Page 6 of 14

Calculation No. ZPMDRIFT-0426012, Rev. 0 5.0 METHOD OF CALCULATION In order to calculate bounding drift values for a 92 day surveillance interval, the methods of Reference 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 of the data was performed using various functions within ExcelTM.

A linear regression analysis of the data was performed to determine if drift is time dependent. The data were tested for normality, and estimates of the bounding values of drift were determined using the methods for normal distributions. Scatter plots and histograms were prepared to assist in visualization of the data.

5.1 Instrument Block Diagran Figure 1 is a diagram of a typical Wide Range Nuclear Instrumentation channel. The scope of drift 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 ZPM Bistable output to RPS Fission Preamplifier Signal Processor Chamber 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 of the Zero Power Mode Bypass. The setpoint is verified to fall within an acceptance range of 7.1 X 10-5 to 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 of time between the two surveillance dates. The twelve surveillance procedures effectively verify the Zero Power Page 7 of 14

Calculation No. ZPMDRIFT-0426012, Rev. 0 Mode Bypass bistable setting using the same methodology. As a result, the calibration interval for each channel will be based on the period of time 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 of 2005 to July of 2007. The associated workorders have been identified for each completed surveillance.

5.4 Spreadsheet Calculations Microsoft ExcelTM, 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 of the best-fit straight line for the regression analyses.

The computations performed to the full precision of ExcelTM 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 CALCULATION 6.1 Drift Analysis The identified surveillance procedures simulate an input signal through operation of a potentiometer on the Wide Range Nuclear Instrumentation 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" values.

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Calculation No. ZPMDRIFT-0426012, Rev. 0 6.2 Historical Data Compilation No Days Drift (Dec) No Days Drift (Dec) No Days Drift (Dec) No Days Drift (Dec) 1 1 -0.0269 39 15 0.0000 77 28 0.0000 115 36 0.0000 2 3 -0.0269 40 15 0.0000 78 28 0.0000 116 37 0.0000 3 4 -0.0269 41 15 0.0000 79 28 0.0000 117 37 0,0000 4 7 -0.0269 42 16 0.0000 80 28 0.0000 118 38 0.0000 5 9 -0.0269 43 17 0.0000 81 28 0.0000 119 38 0.0000 6 13 -0.0269 44 17 '0.0000. 82 28 0.0000 120 38 0.0000.

7 15 -0.0269 45 17 0.0000 83 28 0.0000 121 38 0.0000 8 15 -0.0269 46 17 0.0000 84 28 0.0000 122 38 0.0000 9 15 -0.0269 47 19 0.0000 85 28 0.0000 123 38 0.0000 10 19 -0.0269 48 19 0.0000 86 28 0.0000 124 38 0.0000 11 25 -0.0269 49 19 0.0000 87 28 0.0000 125 42 0.0000 12 28 -0.0269 50 19 0.0000 88 28 0.0000 126 42 0.0000 13 28 -0.0269 51 19 0.0000 89 28 0.0000 127 42 0.0000 14 34 -0.0269 52 19 0.0000 90 28 0.0000 128 42 0.0000 15 0 0.0000 53 19 0.0000 91 28 0.0000 129 51 0.0000 16 1 0.0000 54 19 0.0000 92 28 0.0000 130 51 0.0000 17 1 0.0000 55 19 0.0000 93 29 0.0000 131 51 0.0000 18 1 0.0000 56 20 0.0000 94 29 0.0000 132 55 0.0000 19 1 0.0000 57 21 0.0000 95 29 0.0000 133 64 0.0000 20 1 0.0000 58 21 0.0000 96 31 0.0000 134 64 0.0000 21 2 0.0000 59 21 0.0000 97 31 0.0000 135 64 0.0000 22 2 0.0000 60 21 0.0000 98 31 0.0000 136 64 0.0000 23 3 0.0000 61 22 0.0000 99 31 0.0000 137 1 0.0269 24 4 0.0000 62 22 0.0000 100 31 0.0000 138 4 0.0269 25 7 0.0000 63 23 0.0000 101 31 0.0000 139 7 0.0269 26 7 0.0000 64 23 0.0000 102 31 0.0000 140 15 0.0269 27 7 0.0000 65 23 0.0000 103 31 0.0000 141 18 0.0269 28 7 0.0000 66 23 0.0000 104 31 0.0000 142 20 0.0269 29 9 0.0000 67 25 0.0000 105 31 0.0000 143 21 0.0269 30 11 0.0000 68 27 0.0000 106 . 31 0.0000 144 28 0.0269 31 11 0.0000 69 27 0.0000 107 33 0.0000 145 28 0.0269 32 11 0.0000 70 27 0.0000 108 33 0.0000 146 33 0.0269 33 13 0.0000 71 27 0.0000 109 33 0.0000 147 33 0.0269 34 15 0.0000 72 27 0.0000 110 33 0.0000 148 37 0.0269 35 15 0.0000 73 27 0.0000 111 33 0.0000 149 37 0.0269 36 15 0.0000 74 27 0.0000 112 34 0.0000 150 41 0.0269 37 15 0.0000 75 28 0.0000 113 34 0.0000 38 15 0.0000 76 28 0.0000 114 34 0.0000 Table 1: WR-Log A/D Drift Data Table I presents the results of the drift determination, described above. The drift data are in order of increasing values of drift.

6.3 Tests for Outliers There were no suspected outliers in the results. Therefore, this test was not performed and no data points were removed from the sample population.

Page 9 of 14

Calculation No. ZPMDRIFT-0426012, Rev. 0 6.4 Data Plots The scatter plots and histograms, Figures 2 and 3, provide a graphical presentation of the drift data. These graphs were created using ExcelTM.

WR-LOG-AJD Drift Data 0.0300 0.0200 0.0100.

0.0000 . . .4 10 20 30 40 50 60

-0.0100

-0.0200 -- ...

-0.0300 Surveillance Interval (days)

Figure 2: Scatter Plot - WR-LOG-A/D Drift Data A visual inspection of the scatter plot indicates no apparent connection between the magnitude and the duration of the surveillance interval. A linear regression analysis of the data will confirm or deny the visual observation that the magnitude of drift is not dependent on the duration between surveillances.

WR-LOG-.NBICID 16 14 12 C)

U. 6 4

2

-0.0269 0.0269 Drift (decades)

Figure 3: Histogram - WR-LOG-A/D Drift Data Page 10 of 14

Calculation No. ZPMDRIFT-0426012, Rev. 0 The histogram does not appear to be from a normal distribution. A D' Test shall confirm or deny the normality of the drift data.

6.5 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 '*l[inly where:

n is the number of values in the sample xi represents the values in the sample arranged in increasing order Then the D' test statistic was calculated:

Dl= T S

where:

S2 = (n-i )S2 and S2 is the unbiased estimate of the population variance The mean and standard deviation calculate as follows:

Mean X= Ex, Standard deviation= s = (x, -X) n (n -i)ý where:

xj represents the values in the sample arranged in increasing order n is the number of values in the sample Using Excel, the standard deviation, s, calculates to 0.01166 and the mean is 0.0.

Therefore, the variance s2 calculates to 1.3596E-4.

Page 11 of 14

Calculation No. ZPMDRIFT-0426012, Rev. 0 Using the above formula, with n is equal to 150 data samples, S 2 = (150-1)1.3596E-4 = 0.0203 The test statistic, D' was then compared to the critical values from Table 5 of Reference 3.1.16 at a significance level, a = 0.02 (P = 0.01 and 0.99).

The results, calculated by ExcelTM , are:

T--51.218 51.218 Therefore, D'= - 359.82 400623 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 of a normal distribution is rejected at a = 0.02.

6.6 Bounding Values of Drift For a non-normal distribution, the proportion of the population exceeding assumed bounds can be determined from Reference 3.1.1.

(x + O)Fa 2:2(x+,).2(n-x)

Pu (n - x) + (x + 1)F,,12:2(x+1.2 _xx Assumed upper and lower bounds (pass/fail criterion) are selected as +/- 0.0269 decades.

Then, X = 0, and the above equation becomes:

Pu 25.2 150 3.781 0.025 150Foo

+0F025:2.300 150+3.781 Thus, 97.5% of the population will lie within a bound of+ 0.269 decades.

It is important to note here that none of the instruments required recalibration. Therefore, in terms of real drift, none of the affected instrument channels drifted beyond 0.0269 decades from the period of January 2005 to July of 2007. However, for purposes of added conservatism, each successive calibration interval was assumed as a unique data point with no credit for non-adjustment of the instrument setpoint.

6.7 Linear Regression Analysis of Drift As stated earlier, examination of the scatter plot shows no apparent time dependency in the drift. Linear regression analyses of the absolute values of the data, performed by ExcelTM using the SLOPE and INTERCEPT functions, provide the slope and intercept of the best-fit straight line.

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Calculation No. ZPMDRIFT-0426012, Rev. 0 Slope = -1.486XI 04 Intercept = 0.0086 The negative slope of the regression line for the drift data confirm 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 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 of drift for a 92 day surveillance interval for the Zero Power Mode bypass auto removal function is +/- 0.0269 decades, Bound + 0.0269 decades This value is less than the + 0.08 decades drift term assumed in calculation PA79-219-00767GE Revision I (Reference 3.1.14).

6.8 Setpoint Derivation The 1IX 10-4 %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 of this calculation, the upper tni. setpoint limit shall be calculated by subtracting from the allowable value of 1.OXIO % reactor power the root of the sum of the squares of the expected errors which would be seen during the calibration process. The expected uncertainty terms include Rack Drift (RD), Rack Calibration Accuracy (RCAzp) associated with the Zero Power Mode Function and Measurement and Test Equipment (MTE). These terms have been derived from calculation PA79-219-00767GE Revision I (Reference 3.1.14). They are as follow:

RCAzp = + 0.10 decades RD = + 0.08 decades It is important to note this drift value is much more conservative that the expected drift term calculated within this calculation. (+ 0.0269 decades).

MTE = + 0.01 decades Total Expected Uncertainty during performance of the Zero Power Mode Bypass function surveillance would be calculated as follows:

SVMr +/-= (RCA p))2 (-)2+ + (MTE)2 Page 13 of 14

Calculation No. ZPMDRIFT-0426012, Rev. 0 SV entr = +/- (.10)2 +(.08)2 +(.01)2 =d- 0.13 decades The Allowable Value for the Zero Power Mode Bypass function is again 1.OXI 0-4 reactor power. In terms of decades, 1.0Xl0-4 equates to the following:

Log(1.0XI0-4) = .4 These instruments have 10 decades ranging from 10-8 to 102. In terms of logarithmic function:

Log(10"1) = -8 Log(j10 2) = 2 In terms of log, this span ranges from -8 to 2. To determine the upper trip setpoint limit, 0.13 decade must be subtracted from logarithmic value of 1.0X10 which is -4.

Upper trip setpoint limit equals 0.13 = -4.13 decades.

In terms of% reactor power, -4.13 decades equals10-413 or 7.413X10 5 % power.

Figure 4 below provides a simplified diagram of the upper trip setpoint derivation.

Allowable Value

{SVi., =

L.0X10 4 (-4 log)

-0.13 decades or log 7.413X10s (-4.13 log)

As-found As-left trip Actual field setpoint setpoint band if.

Figure 4: Upper Trip Setpoint Derivation 7.0 DESIGN VERIFICATION Design verification was done by means of a full design review in accordance with Design Control Manual, Chapters 4 and 5. A copy of the Calculation Review Comment and Resolution Form is included as an attachment.

Page 14 of 14

Calculation No. ZPMDRIFT-0426012, Rev. 0 Appendix Historical Surveillance Data WR-LOG-A, WR-LOG-B, WR-LOG-C & WR-LOG-D Page A l

Calculation No. ZPMDRIFT-0426012, Rev. 0 I WR-LOG-A Surveillance Data Surveillance Completion AS FOUND AS LEFT DRIFT AS FOUND AS LEFT DRIFT Absoulte Procedure Work Order Date  % Power  % Power (Log) Decades Decades Decades DAYS Drift SP2401GA M20702383 07/19/2007 1.00E-04 1.00E-04 -4.0000 -4.0000 SP2401BC1 M20600025 07/16/2007 9.40E-05 9.40E-05 -6.OOE-06 -4.0269 -4.0269 -0.0269 0.0269 3

SP2401GA M20701671 06/28/2007 1.00E-04 1.OOE-04 6,00E-06 -4.0000 -4.0000 0.0269 18 0.0269 SP2401GA M20700842 06/07/2007 1.OOE-04 1.OOE-04 0.00E+00 -4.0000 -4.0000 0.0000 21 0.0000 SP2401GA M20700061 05/04/2007 1.00E-04 1.00E-04 0.OOE+00 -4.0000 -4.0000 0.0000 34 0.0000 SP2401 GA M20609438 03/27/2007 1.00E-04 1.OOE-04 0.00E+00 -4.0000 -4,0000 0.0000 38 0.0000 SP2401 GA M20607927 02/27/2007 1,00E-04 1.OOE-04 0.OOE+00 -4.0000 -4.0000 0.0000 28 0.0000 SP2401GA M20607014 02/02/2007 1.OOE-04 1 0E-04 0.OOE+00 -4.0000 -4.0000 0.0000 25 0.0000 SP2401GA M20606247 01/16/2007 1.00E-04 1.00E-04 0.OOE+00 -4.0000 -4.0000 0.0000 17 0.0000 SP2401GA M20605502 12/05/2006 1.00E-04 1.00E-04 0.OOE+00 -4.0000 -4.0000 0.0000 42 0.0000 SP2401881 M20504175 11116/2006 1.00E-04 1.00E-04 0.00E+00 -4.0000 -4.0000 0.0000 19 0.0000.

SP2401GA M20604755 11/15/2006 i.00E-04 1.00E-04 0.00E+00 -4.0000 -4.0000 0.0000 1 0.0000 SP2401 GA M20603026 09/12/2006 1.00E-04 1.00E-04 0.OOE+00 -4.0000 -4.0000 0.0000 64 0.0000 SP2401 GA M20602006 08/15/2006 1.OOE-04 1.OOE-04 0.00E+00 -4.0000 -4.0000 0.0000 28 0.0000 SP2401GA M20601062 07/18/2006 1.OOE-04 1.00E-04 0.00E+00 -4.0000 -4.0000 0.0000 28 0.0000 SP2401 GA M20600096 06/20/2006 9.40E-05 9.40E-05 -6.00E-06 -4.0269 -4.0269 -0.0269 28 0.0269 SP2401GA M20512070 06/05/2006 1.00E-04 1.00E-04 6.00E-06 -4.0000 -4.0000 0.0269 15 0.0269 SP2401GA M20511380 05/08/2006 9.40E-05 9.40E-05 -6.00E-06 -4.0269 -4.0269 -0.0269 28 0.0269 SP24018B1 M20602053 04/05/2006 1.00E-04 1,00E-04 6.00E-06 -4.0000 -4.0000 0.0269 33 0.0269 SP2401GA M20510621 03129/2006 1.00E-04 1.00E-04 0.OOE+00 -4.0000 -4.0000 0.0000 7 0.0000 SP2401GA M20509769 03/06/2006 1.OOE-04 1.00E-04 0.00E+00 -4.0000 -4.0000 0.0000 23 0.0000 SP2401BB1 M20402580 02123/2006 1.00E-04 1.00E-04 0.00E+00 -4.0000 -4.0000 0.0000 11 0.0000 SP2401BC1 M20406730 02/14/2006 9.40E-05 9.40E-05 -6.00E-06 -4.0269 -4.0269 -0.0269 9 0.0269 SP2401 GA M20509024 02/07/2006 1.00E-04 1.00E-04 6.00E-06 -4.0000 -4.0000 0.0269 7 0,0269 SP2401GA M20508223 01/05/2006 1.00E-04 1.00E-04 0.00E+00 -4.0000 -4.0000 0.0000 33 0.0000 SP2401GA M20507476 12/0912005 1.OOE-04 1.00E-04 0.OOE+00 -4.0000 -4.0000 0.0000 27 0.0000 SP2401GA M20506707 11/0812005 1.00E-04 1.00E-04 0.00E+00 -4.0000 -4,0000 0.0000 31 0.0000 SP2401GA M20505140 10/20/2005 9.40E-05 9.40E-05 -6.00E-06 -4.0269 -4.0269 -0.0269 19 0.0269 SP2401GA M20503476 09/13/2005 1.00E-04 1.00E-04 6.00E-06 -4.0000 -4.0000 0.0269 37 0.0269 SP2401GA M20502597 08/29/2005 9.40E-05 9.40E-05 -6.00E-06 4.0269 -4.0269 -0.0269 15 0.0269 SP2401GA M20501552 08/01/2005 1.OOE-04 1.00E-04 6,00E-06 -4.0000 -4.0000 0.0269 28 0.0269 SP2401GA M20500102 06/2412005 1.00E-04 1.00E-04 0.OOE+00 -4.0000 -4.0000 0.0000 38 0.0000 SP2401 GA M20412412 05/2412005 1.OOE-04 1.OOE-04 0.OOE+00 -4.0000 -4.0000 0.0000 31 0.0000 SP2401GA M20411407 05/23/2005 9.40E-05 9.40E-05 -6.00E-06 -4.0269 -4.0269 -0.0269 1 0.0269 SP2401BB1 M20314121 05/19/2005 1.00E-04 1.00E-04 6.OOE-06 -4.0000 -4.0000 0.0269 4 0.0269 SP2401GA M20410435 03/29/2005 1.00E-04 1.00E-04 0.OOE+00 -4.0000 -4.0000 0.0000 51 0.0000 SP2401GA M20409365 03/1412005 9.40E-05 9.40E-05 -6.00E-06 -4.0269 -4.0269 -0.0269 15 0.0269 SP2401GA M20408330 02/14/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 28 0.0000 SP2401GA M20407340 01104/2005 1.OOE-04 1.00E-04 6.00E-06 -4.0000 -4.0000 0.0269 41 0.0269 Page A2

Calculation No. ZPMDRIFT-0426012, Rev. 0 WR-LOG-B Surveillance Data Surveillance Completion AS FOUND AS LEFT DRIFT AS FOUND AS LEFT DRIFT Absoulte Procedure Work Order Date  % Power  % Power (Log) Decades Decades Decades DAYS Drift SP240IGB M20702384 07/19/2007 9.40E-05 9.40E-05 -4.0269 -4.0269 SP2401BC2 M20512632 06/28/2007 9.40E-05 9.40&-05 0.OOE+00 -4.0269 -4.0269 0.0000 21 0.0000 SP2401GB M20701672 06/28/2007 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 0 0.0000 SP2401GB M20700843 06/07(2007 1.00E-04 1.00E-04 6,002-06 -4.0000 -4.0000 0.0269 21 0.0269 SP2401GB M20700062 05/04/2007 9.40E-05 9.40E-05 -6.00E-06 -4.0269 -4.0269 -0.0269 34 0.0269 SP2401GB M20609439 03/2712007 9.40E-05 9.40E-05 0.OOE+00 4.0269 -4.0269 0.0000 38 0.0000 SP2401GB M20607928 02/27/2007 1.00E-04 1.OOE-04 6,00E-06 -4.0000 -4.0000 0.0269 28 0.0269 SP240IGB M20607015 02/02/2007 9.40E-05 9.40E-05 -6.00E-06 -4.0269 4.0269 -0.0269 25 0.0269 SP240IGB M20606248 01/16/2007 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 17 0.0000 SP2401GB M20605503 12/05/2006 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 42 0.0000 SP2401BB2 M20504176 11/16/2006 9.40E-05 9.40E-05 O.OOE+00 -4.0269 -4.0269 0.0000 19 0.0000 SP2401GB M20604756 11/15/2006 9.40E-05 9.40E-05 O.OOE+00 -4.0269 -4.0269 0.0000 1 0.0000 SP240IGB M20603027 09/1212006 9.40E-05 9.40E-05 O.OOE+00 -4.0269 -4.0269 0.0000 64 0.0000 SP2401 GB M20602007 08/15/2006 9.40E-05 9.40E-05 O.OOE+00 -4.0269 -4.0269 0.0000 28 0.0000 SP2401GB M20601063 07(18/2006 9.40E-05 9.40E-05 O,OOE+00 -4.0269 -4.0269 0.0000 28 0.0000 SP2401GB M20600097 06/20/2006 9.40E-05 9.40E-05 O.00E+00 -4.0269 -4.0269 0.0000 28 0.0000 SP2401GB M20512071 06/05/2006 9.40E-05 9.40E-05 O.OOE+00 -4.0269 -4.0269 0.0000 15 0.0000 SP2401GB M20511381 0510812006 9.40E-05 9.40E-05 O.OOE+00 -4.0269 -4.0269 0.0000 28 0,0000 SP2401 BB2 M20602052 04/05/2006 1.00E-04 1.00E-04 6.00E-06 -4.0000 -4.0000 0.0269 33 0.0269 SP240IGB M20510622 03/29/2006 9,40E-05 9.40E-05 -6.00E-06 -4.0269 -4.0269 -0.0269 7 0.0269 SP2401 GB M20509770 03106/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 23 0.0000 SP2401BB2 M20402581 02/23/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 11 0.0000 SP240IGB M20509025 02/07/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 16 0.0000 SP2401BC2 M20406595 01/18/2006 1.00E-04 1.OOE-04 6.00E-06 -4.0000 -4.0000 0.0269 20 0.0269 SP2401GB M20508224 01/05/2006 9.40E-05 9.40E-05 -6.OOE-06 -4.0269 -4.0269 -0.0269 13 0.0269 SP240IGB M20507477 12/09/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 27 0.0000 SP2401GB M20506708 11/08/2005 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 31 0.0000 SP2401GB M20505141 10/20/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 19 0.0000 SP2401 GB M20503477 09/13/2005 1.00E-04 1.00E-04 6.00E-06 -4.0000 -4.0000 0.0269 37 0.0269 SP2401GB M20502598 08/29/2005 9.40E-05 9.40E-05 -6.00E-06 -4.0269 -4.0269 -0.0269 15 0.0269 SP2401GB M20501553 08/01/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 28 0.0000 SP2401GB M20500103 06/29/2005 9.40E-05 9.40E-05 0.OOE+00 -4,0269 -4.0269 0.0000 33 0.0000 SP2401GB M20412413 05/24/2005 9.40E-05 9.40E-05 O.OOE+00 -4.0269 -4.0269 0.0000 36 0.0000 SP2401GB M20411408 05/23/2005 1.00E-04 1.00E-04 6.00E-06 -4.0000 -4.0000 0.0269 1 0.0269 SP2401BB2 M20314122 05/19/2005 9.40E-05 9.40E-05 -6.OOE-06 4.0269 -4.0269 -0.0269 4 0.0269 SP2401GB M20410436 03/29/2005 9.40E-05 9.40E-05 O.OOE+00 -4.0269 -4.0269 0.0000 51 0.0000 SP2401GB M20409366 03/14/2005 9.40E-05 9.40E-05 O.OOE+00 4.0269 -4.0269 0.0000 15 0.0000 SP2401GB M20408331 02/14/2005 9.40E-05 9.40E-05 O.OOE+00 -4.0269 -4.0269 0.0000 28 0.0000 SP2401GB M20407341 01/14/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 31 0,0000 Page A3

Calculation No. ZPMDRIFT-0426012, Rev. 0 I WR-LOG-C Surveillance Data I Surveillance Completion AS FOUND AS LEFT DRIFT AS FOUND AS LEFT DRIFT Absoulte Procedure Work Order Date  % Power  % Power (Log) Decades Decades Decades DAYS Drift SP2401 GC M20702385 07/19/2007 9.40E'05 9.40E-05 -4.0269 -4.0269 SP2401BC3 M20600413 07117/2007 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 2 0.0000 SP2401GC M20701673 06/28/2007 9.40E-05 9,40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 19 0.0000 SP2401 GC M20700844 06/07/2007 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 21 0.0000 SP2401GC M20700063 05/0412007 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 34 0.0000 SP2401GC M20609440 03127/2007 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 38 0.0000 SP2401GC M20607929 03/05/2007 9.40E-05 9.40E-05 0.00E+00 4.0269 -4.0269 0.0000 22 0.0000 SP2401 GC M20607016 02/02/2007 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 31 0.0000 SP2401GC M20606249 01/16/2007 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 17 0.0000 SP2401GC M20605504 12/05/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 42 0.0000 SP2401 BB13 M20504177 11/16/2006 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 19 0.0000 SP2401 GC M20604757 11/15/2006 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 1 0.0000 SP2401GC M20603028 09/12/2006 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 64 0.0000 SP2401GC M20602008 08114/2006 9.402-05 9.40E-05 0.00E+00 4.0269 -4.0269 0.0000 29 0.0000 SP2401GC M20601064 07/18/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 27 0.0000 SP2401GC M20600098 06/20/2006 9.40E-05 9.40E-05 0.002+00 -4.0269 -4.0269 0.0000 28 0.0000 SP2401GC M20512072 0610512006 9.40E-05 9.40E-05 0.00E+00 4.0269 -4.0269 0.0000 15 0.0000 SP2401GC M20511382 05/08/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 28 0.0000 SP24011BB3 M20602051 04/05/2006 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 33 0.0000 SP2401GC M20510623 03/29/2006 9.40E-05 9.40E-05 0.002+00 4.0269 -4.0269 0.0000 7 0.0000 SP2401GC M20509771 03/06/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269. -4.0269 0.0000 23 0.0000 SP24011BB3 M20402582 02/23/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 11 0.0000 SP2401BC3 M20407114 02/14/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 9 0.0000 SP2401 GC M20509026 02/0712006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 7 0.0000 SP2401GC M20508225 01/05/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 33 0.0000 SP2401GC M20507478 12/09/2005 9.40E-05 9.40E-05 0-00E+00 -4.0269 -4.0269 0.0000 27 0.0000 SP2401GC M20506709 11/08/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 31 0.0000 SP2401GC M20505142 10/20/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4,0269 0.0000 19 0.0000 SP2401GC M20503478 09/13/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 37 0.0000 SP2401GC M20502599 08/29/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 15 0.0000 SP2401 GC M20501554 08/01/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 28 0.0000 SP2401GC M20500104 06/24/2005 9.4o0:0E5 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 38 0.0000 SP2401GC M20412414 05/24/2005 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 31 0.0000 SP2401GC M2041 1409 05/23/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 1 0.0000 SP2401BB3 M20314123 05/19/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 4 0.0000 SP2401GC M20410437 03/29/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 51 0.0000 SP2401GC M20409367 03/14/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 4.0269 0.0000 15 0.0000 SP2401GC M20408332 02/14/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 28 0.0000 SP2401GC M20407342 01/14/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 31 0.0000 Page A4

, V, Calculation No. ZPMDRIFT-0426012, Rev. 0 SWR-LOG-D Surveillance Data I Surveillance Completion AS FOUND AS LEFT DRIFT AS FOUND AS LEFT DRIFT Absoulte Procedure Work Order Date  % Power  % Power (Log) Decades Decades Decades DAYS Drift SP2401 GD M20702386 07119/2007 9.40E-05 9.40E-05 4.0269 4.0269 SP2401 GD M20701674 06/28/2007 9.40E-05 9.40E-05 0.00E+00 -4.0269 4.0269 0.0000 21 0.0000 SP2401BC4 M20512601 06/26/2007 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 2 0.0000 SP2401 GD M20700845 06/07/2007 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 19 0.0000 SP2401GD M20700064 05/04/2007 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 34 0.0000 SP2401GD M20611796 03/27/2007 9.40E-05 9.40E-05. 0.OOE+00 -4.0269 -4.0269 0.0000 38 0.0000 SP2401GD M20610679 03/05/2007 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 22 0.0000 SP2401GD M20609441 02/02/2007 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 31 0.0000 SP2401GD M20607930 01/16/2007 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 17 0.0000 SP2401GD M20607017 12105/2006 9.40E-05 9.40E-05 0.OOE+00 -4.0269 4.0269 0.0000 42 0.0000 SP24011B34 M20504178 11/16/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 19 0.0000 SP2401GD M20606250 11115/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 1 0.0000 SP2401GD M20604758 09/12/2006 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 64 0.0000 SP2401GD M20603946 08114/2006 9.40E-05 9.40E-05 0,00E+00 -4.0269 4.0269 0.0000 29 0.0000 SP2401GD M20603029 07/18/2006 9.40E-05 9.40E-05 0.002E00 -4.0269 -4.0269 0.0000 27 0.0000 SP2401GD M20602009 06/20/2006 9.402-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 28 0.0000 SP2401GD M20601065 06/0512006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 15 0.0000 SP2401GD M20600099 05/08/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 28 0,0000 SP2401BB4 M20602049 04/05/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 33 0.0000 SP2401GD M20512073 03/29/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 7 0.0000 SP2401GD M20511383 03/06/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 23 0.0000 SP2401GD M20510624 02/07/2006 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 27 0.0000 SP2401BC4 M20406567 01/18/2006 9.40E-05 9.40E-05 0.00E+00 4.0269 4.0269 0.0000 20 0.0000 SP2401GD M20509772 01/0512006 9.40E-05 9.40E-05 0.00E+00 4.0269 -4.0269 0.0000 13 0.0000 SP2401GD M20509027 12109/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 27 0.0000 SP2401GD M20508226 11/08/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 4.0269 0.0000 31 0.0000 SP2401GD M20505143 10/20/2005 9.40E-05 9.40E-05 0.OOE+00 -4.0269 -4.0269 0.0000 19 0.0000 SP2401GD M20503479 09/13/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 37 0.0000 SP2401GD M20502600 08/29/2005 9.40E-05 9.40E-05 0.00E+00 4.0269 -4.0269 0.0000 15 0.0000 SP2401GD M20501555 08/01/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 28 0.0000 SP2401GD M20500105 06/24/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 38 0.0000 SP2401GD M20412415 05/26/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 29 0.0000 SP2401GD M20411410 05/23/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 3 0.0000 SP2401GD M20410438 03/29/2005 9A40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 55 0.0000 SP2401GD M20409368 03/14/2005 9.40E-05 9.40E-05 0.00E+00 -4.0269 -4.0269 0.0000 Is 0.0000 SP2401GD M20408333 02/14/2005 9.40E-05 9.40E-05 0.00E+00 4.0269 -4.0269 0.0000 28 0.0000 SP2401GD M20407343 01/14/2005 9.40E-05 9.40E-05 O.00E+00 -4.0269 -4.0269 0.0000 31 0.0000 Page A5

Serial No. 06-0841B Docket No. 50-336 ATTACHMENT 3 INSTRUMENTATION TECHNICAL SPECIFICATION CHANGES MARKED UP TECHNICAL SPECIFICATION PAGES DOMINION NUCLEAR CONNECTICUT, INC.

MILLSTONE POWER STATION UNIT 2

March 16, 2006 TABLE 3.3-1 (Continued)

TABLE NOTATION

• With the protective system trip breakers in the closed position and the CEA drive system capable of CEA withdrawal.

(a) nirip may be bypassed below 5% of RATED THERMAL POWER; bypass shall be f) automatically removed when THERMAL POWER is Ž5% of RATE) THERMAL POWER.

C(b) Trip may be manually bypassed when steam generator pressure is < 800 psia and all CEAs are fully inserted; bypass shall be automatically removed when steam generator pressure is a 800 psia.

(c) Trip may be bypassed below 15% of RATED THERMAL POWER; bypass shall be automatically removed when THERMAL POWER is > 15% of RATED THERMAL POWER-(d) Trip does not need to be OPERABLE if all the control rod drive mechanisms are de-energized or if the RCS boron concentration is greater than or equal to the refueling concentration of (9 Specification 3.9.1.

(e) DELETED (f) AT Power input to trip may be bypassed below 5% of RATED TIERMAL POWER; bypass shall be automatically removed when THERMAL POWER is > 5% of RATED THERMAL 1~e APOWER.

ACTION STATEMENTS ACTION I - With the number of channels OPERABLE one less than required by the Minimum Channels OPERABLE requirement, restore the inoperable channel to OPERABLE status within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or be in HOT STANDBY within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and/or open the protective system trip breakers.

ACTION 2 - With the number of OPERABLE channels one less than the Total Number of Channels, operation may continue provided the following conditions are satisfied:

a. The inoperable channel is placed in either the bypassed or tripped condition within I hour. The inoperable channel shall either be restored to OPERABLE status, or placed in the tripped condition, within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.

b. Within I hour, all functional units receiving an input from the inoperable channel are also declared inoperable, and the appropriate actions are taken for the affected functional units.

C. The Minimum Channels OPERABLE requirement is met; however, one additional channel may be removed from service for up to 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, provided one of the inoperable channels is placed in the tripped condition.

MILLSTONE - UNIT 2 3/4 3-4 Amendment No. 9, -3, 22, 44-6,4-39, M, -26,2&.

Reissued by NRC Letter dated September 27, 2&6

h S

Serial No. 06-0841A Docket No. 50-336 Insert C Trip may be bypassed when logarithmic power is < 1E-04% and the bypass shall be capable of automatic removal whenever logarithmic power is < 1E-04%.

Bypass shall be removed prior to raising logarithmic power to a value Ž_ 1E-04%.

Insert G AT Power input to trip may be bypassed when logarithmic power is < 1E-04% and the bypass shall be capable of automatic removal whenever logarithmic power is < IE-04%.

Bypass shall be removed prior to raising logarithmic power to a value Ž> 1E-04%.

TABLE 3.3-1 (Continued) (!E62OO ACTION STATEMENTS ACTION 3 - NOT USED ACTION 4 - With the number of channels OPERABLE one less than required by the Minimum Channels OPERABLE requirement, immediately verify compliance with the SHUTDOWN MARGIN requirements of Specification 3. 1.1. 1, and at least once 4yA-per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> thereafter.

ACTION 5 - With the number of channels OPERABLE one less than required by the Minimum Channels OPERABLE requirement, restore the inoperable channel to OPERABLE status within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

ACTION 6 - With the number of channels OPERABLE one less than required by the Minimtum Channels OPERABLE requirement, be in at least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

MILLSTONE - UNIT 2 3/4 3-5 Amendment No.

Serial No. 06-0841A Docket No. 50-336 Insert D ACTION 7 - With one automatic bypass removal channel inoperable for one or more functions, either

a. disable the bypass channel within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, or

b. place the affected trip units in bypass or trip within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, and either

1. restore the bypass removal channel and affected trip units to OPERABLE status within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, or

2. place the affected trip units in trip within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.

ACTION 8 - With two automatic bypass removal channels inoperable for one or more functions, either

a. disable the bypass channels within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, or

b. place one affected trip unit in bypass and place the other in trip for each affected trip function, within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, and restore one automatic bypass removal channel and the associated trip unit to OPERABLE status for each affected trip function, within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.