Text

Request for Additional Information for the Review of License Renewal Application (LRA) Section 4.3
	ML083500379
Person / Time
Site:	Susquehanna
Issue date:	11/26/2008
From:	Spence W; PPL Corp, Susquehanna
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	PLA-6441
	Download: ML083500379 (39)
	v • d • e

William H. Spence Executive Vice President and Chief Operating Officer/Chief Nuclear Officer Tel. 610.774.3683 Fax 610.774.5019 Whspence@pplweb.com PPL Corporation Two North Ninth Street Allentown, PA 18101-1179 Tel. 610.774.5151 www.pplweb.com k

I a NOV 2 6 2008 TM U. S. Nuclear Regulatory Commission Document Control Desk Mail Stop OP 1-17 Washington, DC 20555 SUSQUEHANNA STEAM ELECTRIC STATION REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (LRA)

SECTION 4.3 PLA-6441 Docket Nos. 50-387 and 50-388

References:

1) PLA-6110, Mr. B. T McKinney (PPL) to Document Control Desk (USNRC),

"Application for Renewed Operating License Numbers NPF-14 and NPF-22,"

dated September 13, 2006.

2) Letter from Ms. E. H. Gettys (USNRC) to Mr. B. T. McKinney (PPL),

"Request for Additional Information for the Review of the Susquehanna Steam Electric Station, Units ] and 2 License Renewval Application,"

dated October 22, 2008.

In accordance with the requirements of 10 CFR 50, 51, and 54, PPL requested the renewal of the operating licenses for the Susquehanna Steam Electric Station (SSES)

Units 1 and 2 in Reference 1.

Reference 2 is a request for additional information (RAI) related to License Renewal Application (LRA) Section 4.3. provides the question responses and the additional requested information.

Some of the information contained in Enclosure 1 is considered to be proprietary, by GE-Hitachi (GEH), as defined by 10 CFR 2.390. GEH, as the owner of the proprietary information, has executed the enclosed affidavit, which identifies that the enclosed proprietary information has been handled and classified as proprietary, is customarily held in confidence, and has been withheld from public disclosure. The proprietary information was provided to PPL in a GEH transmittal that is referenced by the affidavit.

The proprietary information has been faithfully reproduced in the enclosed information such that the affidavit remains applicable. GEH and PPL hereby request that the enclosed proprietary information be withheld from public disclosure in accordance with the provisions of 10 CFR 2.390 and 9.17.

Aao

/U49 Document Control Desk PLA-6441 The header of each page in Enclosure 1 carries the notation "GEH Proprietary Information." GEH proprietary information is identified by a dotted underline inside double square brackets. ((This sentence is.an.exam..!.e....)) In each case, the superscript notation' refers to Paragraph (3) of the GEH affidavit, which provides the basis for the proprietary determination. Specific information that is not so marked is not GEH proprietary. contains the non-proprietary version of the question responses and the additional requested information. Enclosure 3 contains the signed affidavit.

The Attachment contains SSES plant data for dissolved oxygen levels in support of the response to RAI 4.3-9.

There is one new regulatory commitment contained herein. Commitment #60, regarding actions to be taken in response to NRC concerns with the fatigue analysis software used at SSES, is added to LRA Table A-1.

If you have any questions, please contact Mr. Duane L. Filchner at (610) 774-7819.

I declare, under penalty of perjury, that the foregoing is true and correct.

Executed on:

-0_

-OF_ -

W. H. Spence :

Proprietary Response to NRC's Request for Additional Information (RAI) :

Non-proprietary Response to NRC's Request for Additional Information (RAI) : Affidavit

Attachment:

Dissolved Oxygen Data to Support Response to RAI 4.3-9 Copy: NRC Region I Ms. E. H. Gettys, NRC Project Manager, License Renewal, Safety Mr. R. Janati, DEP/BRP Mr. F. W. Jaxheimer, NRC Sr. Resident Inspector Mr. A. L. Stuyvenberg, NRC Project Manager, License Renewal, Environmental to PLA-6441 Non-Proprietary Response to NRC's Request for Additional Information (RAI)

GEH NON-PROPRIETARY INFORMATION to PLA-6441 Page 1 of 11 NON-PROPRIETARY NOTICE This is a non-proprietary version of the Enclosure 1 response which has the proprietary information removed. Portions of the document that have been removed are indicated by an open and closed bracket as shown here ((

I].

GEH NON-PROPRIETARY INFORMATION to PLA-6441 Page 2 of 11 NRC RAI 4.3-8:

Section 4.3.2 of the license renewal application (LRA) discusses the evaluation of the Reactor Pressure Vessel (RPV) internals. The LRA indicates that structural evaluations were performed to address the effects of operation under extended power uprate conditions and the extended period of operation to 60 years. Explain how the number of reactor design transient cycles for 60 years of plant operation was determined for the analysis of the RPV internals.

PPL Response:

LRA Section 4.3.2 identifies the fatigue evaluations performed to demonstrate the design adequacy of the RPV internals as a time-limited aging analysis (TLAA) requiring disposition under 10 CFR 54.21 (c)(1). In support of the extended power uprate (EPU) and license renewal (LR) projects for SSES, GE-Hitachi (GEH), under contract to PPL, performed the structural evaluation of the RPV internals to address the effects of operation under EPU conditions with extended operation to 60 years. The GEH evaluation concluded that the fatigue usage factors remain within the ASME Section III Subsection NG allowable limits. This evaluation was the basis for the disposition of this TLAA under 10 CFR 54.21(c)(1)(ii) in LRA Section 4.3.2.

As stated in the SSES FSAR Section 3.9.1.1.4, the fatigue analyses for the original 40-year life of the RPV internals considered the reactor design transients that are documented in the SSES FSAR Table 3.9-1. The structural evaluation of the RPV internals for EPU conditions did not alter the number of transient cycles that were considered for the original 40-year life. The EPU conditions were evaluated for any impact on the fatigue analyses of the internals, and new 40-year cumulative usage factors (CUFs) were determined for the EPU conditions. For extended operation to 60 years,

)) Ultimately, the GEH evaluation found that all RPV internals would have 60-year CUFs, under EPU conditions, of less than 1.0.

The projection methodology used by GEH ((

)) the original numbers of cycles defined in SSES FSAR Table 3.9-1.

GEH NON-PROPRIETARY INFORMATION to PLA-6441 Page 3 of 11 RAI 4.3-9:

Section 4.3.3 of the LRA discusses the evaluation of the effects of the reactor coolant environment on the fatigue life of components and piping. Table 4.3-3 provides the 60-year environmental cumulative usage factor (CUF) for each component evaluated.

Provide a summary of the environmental factor (Fen) calculation for each component analyzed; including the values of oxygen level, temperature and strain rate used in the calculations. Also provide the basis for oxygen level, temperature and strain rate values used in the Fen calculations.

PPL Response:

Summaries of the environmental factor (Fen) calculations for each component analyzed for each SSES unit, including the values of oxygen level, temperature and strain rate used in the calculations, are provided in the tables below.

The temperature and strain rate values that were used in the Fen calculations were assumed to be the bounding values, as explained in the notes for each table below.

The dissolved oxygen levels that were used in the Fen calculations were based on the review of plant data. The specific time periods for which the plant data was reviewed to determine the typical levels used in the Fen calculations, which were performed in 2006, were not documented in the calculations. Thus, in response to this RAI, PPL sampled dissolved oxygen data from both SSES units, covering operation before and after the implementation of hydrogen water chemistry, to demonstrate that the levels assumed in

'the calculations are typical levels encountered during plant operation. The sampled data is presented in the Attachment. The data presented for time periods after 1999 is after the implementation of hydrogen water chemistry on both units.

The sampled data in the Attachment supports the following general conclusions, which support the values used for 0* in the Fen calculations. 0*, defined in NUREG/CR-6583 and NUREG/CR-5704, is a parameter determined by the dissolved oxygen level.

" The dissolved oxygen levels in the SSES Unit 1 and Unit 2 feedwater systems, before and after the implementation of hydrogen water chemistry, are maintained at less than 50 parts per billion (ppb).

Before the implementation of hydrogen water chemistry, the dissolved oxygen levels in the SSES Unit 1 and Unit 2 reactor coolant systems were greater than 200 ppb and less than 300 ppb.

" With hydrogen water chemistry in service, the dissolved oxygen levels in the SSES Unit 1 and Unit 2 reactor coolant systems, are less than 50 ppb.

GEH NON-PROPRIETARY INFORMATION to PLA-6441 Page 4 of 11 SSES Unit 1 Environmental Fatigue Calculations Equivalent NUREG/CR-6260 Material 60-Year CUF (1)

Overall 60-Year Environmental Environmental Notes Location Multiplier, Fen (2)

CUF (3)

Reactor Vessel (Shell @ Shroud Support)

Low Alloy Steel 0.3121 13.04 4.070 4

Recirculation Inlet Nozzle Low Alloy Steel 0.1956 13.04 2.551 4

(Low Alloy Forging)

Recirculation Outlet Nozzle Low Alloy Steel 0.4007 13.04 5.225 4

(Low Alloy Forging)

Feedwater Nozzle Carbon Steel 0.3190 1.74 0.555 5

(Safe End)

Feedwater Nozzle (Low Alloy Forging)

Low Alloy Steel 0.0574 2.45 0.141 5

Core Spray Nozzle 13.04 2.866 4

(Low Alloy Forging)

Low Alloy Steel 0.2197 Core Spray Nozzle Inconel 0.6081 1.49 0.906 4,6 (Safe End)

Feedwater Piping, Loop B, Carbon Steel 0.2044 2.45 0.502 5

Break, Node 35 RHR Supply Line Piping, Stainless Steel 0.8221 13.13 10.797 4

Break, Node 669 Recirc. Loop B Suction Piping, Stainless Steel 0.4568 13.13 6.000 4

Break, Node 353 Recirc. Loop A Suction Piping, Stainless Steel 0.2427 13.13 3.187, 4

Break, Node 430 Notes:

1.

2.

3.

4.

5.

6.

Results obtained from FatiguePro fatigue usage accumulated as of 12/31/2002, and projected to 60 years.

An Fen multiplier was calculated for each respective location using the methodology of NUREG/CR-6583 for carbon/low alloy steels or NUREG/CR-5704 for stainless steels assuming the following conditions:

A bounding RPV fluid temperature, T, of 551oF Bounding strain rates of 0.001%/sec.for carbon/low alloy steels and 0.0004%/sec for stainless steels

68% HWC conditions and 32% NWC conditions over a 60-year life. Fen = 0.68

Fen-HWC + 0.32

Fen-NWC

DO levels (ppb): Recirculation system: 253 with Normal Water Chemistry, 0.54 with Hydrogen Water Chemistry Feedwater system: 47 with Normal Water Chemistry, 40 with Hydrogen Water Chemistry 60-Year Environmental CUF = Fen

60-Year CUF.

The recirculation system water chemistry was used.

The feedwater system water chemistry was used.

The following is available for Alloy 600 (Inconel) material from 0. Chopra, "Status of Fatigue Issues at Argonne National Laboratory," presented at EPRI Conference on Operating Nuclear Power Plant Fatigue Issues &

Resolutions, Snowbird, UT, August 22-23, 1996:

In air, T < 150'C: In(Nair) = 6.940 - 1.776 In(Ea - 0.12)

In air, T _>150'C: ln(Nair) = 7.438 - 1.776 ln(Ea - 0.12)

In water, T < 150'C: ln(Nwater) = 6.539 - 1.776 In(Ea - 0.12)

In water, T _>150*C: ln(Nwater) = 7.037 - 1.776 In(Ea - 0.12) where: Ea = strain amplitude (%)

N = fatigue life (cycles to form 3 mm deep crack)

T = temperature (°C)

Thus, dividing Nwater by Nair, a constant Fen value of 1.49 is obtained for all temperature values.

GEH NON-PROPRIETARY INFORMATION to PLA-6441 Page 5 of 11 SSES Unit 2 Environmental Fatigue Calculations Overall 60-Year Equivalent NUREG/CR-6260 Material 60-Year CUF (1)

Environmental Environmental Notes Location Multiplier, Fen (2)

CUF (3)

Reactor Vessel

( ell tSr supr Low Alloy Steel 0.2970 12.44 3.695 4

(Shell @ Shroud Support)

Recirculation Inlet Nozzle (Lowclloy Ing)

Low Alloy Steel 0.1734 12.44 2.158 4

(Low Alloy Forging)

Recirculation Outlet Nozzle Low Alloy Steel 0.3492 12.44 4.344 4

(Low Alloy Forging)

Feedwater Nozzle Carbon Steel 0.3146 1.74 0.547 5

(Safe End)

Feedwater Nozzle (Low Alloy Low Alloy Steel 0.0343 2.45 0.084 5

(Low Alloy Forging)

CoreLow Alloy Steel 0.1852 12.44 2.304 4

(Low Alloy Forging)

Core Spray Nozzle Inconel 0.4011 1.49 0.598 4,6 (Safe End)

Feedwater Piping, Loop B, Carbon Steel 0.1976 2.45 0.485 5

Break, Node 35 RHR Supply Line Piping, Stainless Steel 0.8220 13.26 10.898 4

Break, Node 669 Recirc. Loop B Suction Piping, Stainless Steel 0.4447 13.26 5.896 4

Break, Node 353 Recirc. Loop A Suction Piping, Stainless Steel 0.2344 13.26 3.107 4

Break, Node 430 Notes:

1.

2.

Results obtained from FatiguePro fatigue usage accumulated as of 4/13/2003, and projected to 60 years.

An Fen multiplier was calculated for each respective location using the methodology of NUREG/CR-6583 for carbon/low alloy steels or NUREG/CR-5704 for stainless steels assuming the following conditions:

S S

0 0

A bounding RPV fluid temperature, T, of 551'F Bounding strain rates of 0.001%/sec for carbon/low alloy steels and 0.0004%/sec for stainless steels 70% HWC conditions and 30% NWC conditions over a 60-year life. Fen = 0.70

Fen-HWC + 0.30

Fen-NWC DO levels (ppb): Recirculation system: 255 with Normal Water Chemistry, 0.64 with Hydrogen Water Chemistry Feedwater system: 40 with Normal Water Chemistry, 39 with Hydrogen Water Chemistry 3.

4.

5.

6.

60-Year Environmental CUF = Fen

60-Year CUF.

The recirculation system water chemistry was used.

The feedwater system water chemistry was used.

The following is available for Alloy 600 (Inconel) material from 0. Chopra, "Status of Fatigue Issues at Argonne National Laboratory," presented at EPRI Conference on Operating Nuclear Power Plant Fatigue Issues &

Resolutions, Snowbird, UT, August 22-23, 1996:

In air, T < 150'C: In(Nair) = 6.940 - 1.776 In(Ea - 0.12)

In air, T _>150'C: ln(Nair) = 7.438 - 1.776 In(Ea - 0.12)

In water, T < 150'C: "ln(Nwater) = 6.539 - 1.776 In(Ea - 0.12)

In water, T _>150°C: ln(Nwater) = 7.037 - 1.776 In(Ea - 0.12) where: Ea = strain amplitude (%)

N = fatigue life (cycles to form 3 mm deep crack)

T = temperature (°C)

Thus, dividing Nwater by Nair, a constant Fen value of 1.49 is obtained for all temperature values.

GEH NON-PROPRIETARY INFORMATION to PLA-6441 Page 6 of 11 RAI 4.3-10:

Table 4.3-2 of the LRA provides the 60-year CUF projections for the RPV shell at the shroud support for both units. List the transients that are the most significant contributors to the CUFs of both units. Discuss the fatigue analyses that were performed for the shroud support locations. Also include a discussion of any conservative assumptions that may have been used in the analyses.

PPL Response:

The fatigue analyses for the shroud support were performed by the reactor vessel manufacturer, Chicago Bridge and Iron Company (CBI), under contract to the General Electric Company (GE). The analyses were performed and are documented in the reactor vessel stress report as a part of the reactor pressure vessel design. The analyses were performed in compliance with the requirements of ASME Section III, 1968 Edition to and including Summer 1970 Addenda, and paragraph NB-3338.2(d)(4) of the Winter 1971 Addenda, which supersedes paragraph 1-613(d) of the 1968 Edition.

The thermal transients applicable to the shroud support were specified by GE as a part of the SSES RPV design basis. The transients that were selected for detailed thermal analysis, on the basis of being the most severe, are 1) Natural Circulation Startup,

2) Pre-Op Blowdown, 3) Shutdown, and 4) Loss of AC Power. All other transients affecting the shroud support were grouped under the most severe of these four bounding transients, as the temperature gradients of the four evaluated transients were considered to bound those of all other applicable transients. Therefore, the analyses of these four transients yielded the most severe thermal stresses for the shroud support.

The stress analysis for the shroud support evaluated 40 locations in the shroud support area of the vessel, chosen on the basis of having the most severe stresses. The primary and primary plus secondary stress categories were evaluated in accordance with the ASME Code,Section III, Articles N-414.1, N-414.2, N-414.3, and N-414.4.

The fatigue analysis for the shroud support was performed in accordance with the ASME Code,Section III, Article N-414.5, for peak stress intensity. The ability of the vessel to withstand cyclic operation without fatigue failure is based on the largest magnitude of stress intensity and the largest stress concentration factor at any point of the stress model.

For the low alloy steel portion of the shroud support, the maximum stress amplitude (Sa) value was determined to be 72.53 ksi, and the corresponding allowable number of cycles is 1500, per the ASME Section III fatigue curve, Figure N-415(A). For the inconel portion of the shroud support, the maximum Sa value was determined to be 81.20 ksi, and the corresponding allowable number of cycles is 2800, per the ASME Section III fatigue curve, Figure N-415(B).

GEH NON-PROPRIETARY INFORMATION to PLA-6441 Page 7 of 11 All of the design transients, along with the associated number of cycles assumed in the 40-year life, considered to have an impact on fatigue are as follows:

Design Hydrotest 130 cycles Startup and Shutdown 111 cycles Turbine Trip 10 cycles Partial Feedwater Heater Bypass 70 cycles Turbine Generator Trip 40 cycles All Other Scrams 140 cycles Pre-Op Blowdown 10 cycles Loss of AC Power 15 cycles Design Seismic 10 cycles Total Cycles:

536 Since the analysis conservatively assumed all transients would have the maximum Sa value, the maximum fatigue usage was conservatively determined as the total number of design transient cycles (536) divided by the allowable number of cycles determined for the maximum Sa value. Therefore, for the low alloy steel portion of the shroud support, the maximum fatigue usage is 536/1500, or 0.358. For the inconel portion, the maximum fatigue usage is 536/2800, or 0.191. The limiting value for the low alloy steel, which is applicable to both SSES units, was reported in Table 4.3-2 of the SSES LRA under the "Design CUF" column.

The "60-Year CUF Projections" for Unit 1 and Unit 2 are 0.312 and 0.297, respectively, as shown in Table 4.3-2 of the LRA. The actual plant cycle counts from the beginning and end of a ten-year period of plant operation were used to determine the fatigue usage at those same points in time, using the methodology used in the RPV stress report, as described above. Then, a representative rate of fatigue usage accumulation was determined and used to project the fatigue usage at 60 years, with some conservative adjustments to account for the power uprates implemented at both SSES units.

For Unit 1, the 60-year fatigue usage projection was calculated as follows:

U60 = U2002 + [ (U 2002 - U 1992) / Time1 992 to 2002 ]

Time2002 to 2042

FEPU where:

U60

= the projected fatigue usage for 60 years of operation.

U1992

= the fatigue usage experienced as of 04/26/1992, which is the end of the 7 th operating cycle. The 7 th operating cycle represents the nearest outage that allows 10 years of plant operation to be considered for the forward projections. This value is

GEH NON-PROPRIETARY INFORMATION to PLA-6441 Page 8 of 11 U 2 0 0 2 Time1 9 92 to 2002 Time2002 to 2042 FEPU calculated as the total number of analyzed design transients that occurred as of 4/26/1992 divided by 1297*.

= the fatigue usage experienced as of 12/31/2002, which is the latest fatigue usage information. This value is calculated as the total number of analyzed design transients that occurred as of 12/31/1992 divided by1297*.

= elapsed number of days from 1992 cycle counts (04/26/1992) to the date of the most recent fatigue usage (12/31/2002).

= elapsed number of days from most recent fatigue usage (12/31/2002) to the end of 60-year operating period (07/17/2042).

20% Extended Power Uprate (EPU) factor

1.20. It was conservatively assumed that EPU implementation occurred at the end of the last baselining period (12/31/2002).

The design allowable number of cycles was reduced from 1500 to 1297 to conservatively account for the effects of the 5% power uprate implemented in 1995.

A similar calculation was performed for SSES-2 using unit-specific dates and cycle counts.

RAI 4.3-11:

The August 1, 2008, response to RAI B.3.1-2 indicates the FatiguePro software is used for stress-based fatigue (SBF) monitoring of the feedwater nozzle forgings, feedwater nozzle safe ends, and the control rod drive penetrations. The response to RAI B.3.1-1 also indicates that the SBF monitoring methodology was benchmarked against the relevant design basis stress report for each component to ensure valid fatigue monitoring program fatigue results.

a.

Describe the procedure used to benchmark the SBF monitoring locations against the relevant design reports. List all the transients used for the benchmarking and indicate the design fatigue usage associated with each transient. Also, provide side-by-side comparison on stresses for each transient and each component used for the benchmarking.

GEH NON-PROPRIETARY INFORMATION to PLA-6441 Page 9 of 11

b.

Discuss how the SSES SBF monitoring addresses the concern raised in proposed Regulatory Information Summary (RIS), "Fatigue Analysis of Nuclear Power Plant Components," May 1, 2008 (73 FR 24094).

Indicate whether any additional benchmarking of the SSES SBF monitoring is planned.

PPL Response:

Part a:

The SSES SBF locations in the FatiguePro software were benchmarked against the relevant design basis stress reports by evaluating the key transient pairings from the design basis stress reports using the FatiguePro SBF analysis, and comparing the resulting alternating stress intensities and fatigue usage from FatiguePro to the values determined in the design basis stress reports. Adjustments were made to the Green's Functions, where necessary, to calibrate the FatiguePro analytical models so that the results from the governing stress reports were closely matched for these key transient pairings. The adjustments included scaling the Green's Functions such that the peak stress intensity output from FatiguePro was equal to or higher than the peak stress intensity from the design basis stress report. Any differences were evaluated by an independent calculation to determine acceptability. Discussions of the benchmarking results are provided below for each of the three SBF monitored locations at SSES:

Feedwater Nozzle Safe End Location:

From the design basis stress report for normal/upset conditions, the critical transient pair is Turbine Roll-Hot Standby. The alternating stress intensity for this load pair was determined to be 124.95 ksi in the design basis stress report. The FatiguePro simulation of this transient pair yielded an alternating stress intensity of 125.2 ksi. Since the same ASME Code fatigue curves were used in FatiguePro as in the design basis stress report, the FatiguePro fatigue usage is slightly higher than the design basis stress report due to the slightly higher alternating stress intensity.

A similar stress comparison was performed for the Partial Feedwater Heater Bypass transient. The design basis stress report estimated the thermal stress intensity range as 60.8 ksi, and FatiguePro estimated this range to be 60.13 ksi. Although the FatiguePro result is 1 % lower than the stress report result, this difference is considered to be within the acceptable accuracy of the analytical models.

GEH NON-PROPRIETARY INFORMATION to PLA-6441 Page 10 of 1I Feedwater Nozzle Forging Location:

Since the feedwater nozzle forging is a part of the feedwater nozzle and the thermal stresses in the nozzle forging are significantly lower than in the safe end, the benchmarking of the safe end was considered to bound the nozzle forging location.

CRD Penetration Location:

From the design basis stress report for normal/upset conditions, the critical transient pair is Natural Circulation Startup-Loss of AC Power. The alternating stress intensity for this load pair was determined to be 177.8 ksi in the design basis stress report, which includes a stress concentration factor of 4.0 for the presence of a weld. The FatiguePro simulation of this transient pair yielded an alternating stress intensity of 166 ksi. The difference in stress was attributed to a conservative hypothetical temperature of 534'F used for the bottom head region in the design basis stress report, versus a temperature of 5220F predicted in the bottom head region by FatiguePro. The temperature value estimated by FatiguePro matches the temperature value from the SSES reactor vessel thermal cycle design drawing, and was therefore considered valid, and the lower stress determined by FatiguePro was therefore justified. The incremental fatigue usage for one cycle of this transient pairing was computed as 1/3400 = 0.00029 in the design basis stress report, whereas FatiguePro computed a value of 0.000238. The FatiguePro fatigue usage was lower as a result of the lower alternating stress intensity resulting from the lower bottom head region temperature.

For emergency/faulted conditions, the critical transient pair is Improper Startup-Pipe Rupture. The alternating stress intensity for this load pair was determined to be 282.7 ksi in the design basis stress report, which includes a stress concentration factor of 4.0 for the presence of a weld. The FatiguePro simulation of this transient pair yielded an alternating stress intensity of 285 ksi. The incremental fatigue usage for one cycle of this transient pairing was computed as 1/27 = 0.037 in the design basis stress report, whereas FatiguePro computed a value of 0.0276. The difference in fatigue usage was attributed to a conservatively bounding value of Ke, the multiplier for the maximum stress amplitude (Sa) that is required when the alternating stress intensity is greater than three times the design stress intensity (Sm). A Ke value of 3.33 was used in the design basis stress report based on the reactor design temperature of 575°F, versus a Ke value of 2.95 computed by FatiguePro using the maximum transient temperature of 550'F.

Part b:

At issue in the subject RIS is the conservatism of FatiguePro when a single stress term Green's Function is used. Single stress term Green's Functions are used routinely in FatiguePro, as that is required by the methodology used by the software. As discussed in the response to Part a above, the SSES FatiguePro SBF component models were

GEH NON-PROPRIETARY INFORMATION to PLA-6441 Page 11 of 11 calibrated so that the key fatigue results (i.e., alternating stress intensity and fatigue usage) matched the results documented in the governing design basis stress reports, which were certified in accordance with ASME Code,Section III methodology.

Therefore, any approximations or potential non-conservatisms that may have been invoked in FatiguePro through the deployment of a single stress term Green's Function were compensated for in the calibration process.

The FatiguePro calibration process was not performed for all possible transient pairing scenarios. As a result, it is not possible to demonstrate, without further evaluation, that the SSES FatiguePro application fully addresses all possible scenarios associated with the issues identified in the subject RIS. To address this uncertainty, PPL will either implement fatigue monitoring software that satisfactorily addresses all issues raised in the RIS, or perform a confirmatory ASME Code,Section III fatigue evaluation for the SBF-monitored locations to justify the existing FatiguePro methodology prior to entering the period of extended operation.

Table A-1 SSES License Renewal Commitments LRA Table A-1 (LRA page A-55) is revised by addition (bold italics) as follows:

Table A-1 SSES License Renewal Commitments FSAR Enhancement Item Number Commitment Supplement or Location Implementation (LRA App. A)

Schedule

60) Activities in PPL will either (1) implement fatigue monitoring Prior to the period Response to software that satisfactorily addresses all issues raised of extended NRC in the proposed Regulatory Information Summary operation.

Concerns (RIS), "Fatigue Analysis of Nuclear Power Plant Regarding Components," May 1, 2008 (73 FR 24094), or (2)

Fatigue perform a confirmatory ASME Code,Section III Analyses fatigue evaluation for the SBF-monitored locations to justify the existing FatiguePro methodology used at SSES Units 1 and 2.

I to PLA-6441 Affidavit

GE-Hitachi Nuclear Energy Americas LLC AFFIDAVIT I, James F. Harrison, state as follows:

(1) I am Vice President, Fuels Licensing, Regulatory Affairs, GE-Hitachi Nuclear Energy Americas LLC ("GEH"), have been delegated the function of reviewing the information described in paragraph (2) which is sought to be withheld, and have been authorized to apply for its withholding.

(2)

The information sought to be withheld is contained in GEH letter, GEH-SSES-AEP-353, GEH Review of PPL Response to RAI 4.3 License Renewal, dated November 19, 2008.

The proprietary information in Enclosure 1 entitled, GEH Review of PPL Response to RAI 4.3-8

- License Renewal, is identified by a 'dotted underline inside double square brackets.

((This-sentence is an exam.p13e..)) In each case, the superscript notation

13) refers to Paragraph (3) of this affidavit, which provides the basis for the proprietary determination.

(3)

In making this application for withholding of proprietary information of which it is the owner or licensee, GEH relies upon the exemption from disclosure set forth in the Freedom of Information Act ("FOIA"), 5 USC Sec. 552(b)(4), and the Trade Secrets Act, 18 USC Sec. 1905, and NRC regulations 10 CFR 9.17(a)(4), and 2.390(a)(4) for "trade secrets" (Exemption 4). The material for which exemption from disclosure is here sought also qualify under the narrower definition of "trade secret", within the meanings assigned to those terms for purposes of FOIA Exemption 4 in, respectively, Critical Mass Energy Project v. Nuclear Regulatory Commission, 975F2d871 (DC Cir. 1992), and Public Citizen Health Research Group v. FDA, 704F2d1280 (DC Cir. 1983).

(4) Some examples of categories of information which fit into the definition of proprietary information are:

a.

Information that discloses a process, method, or apparatus, including supporting data and analyses, where prevention of its use by GEH's competitors without license from GEH constitutes a competitive economic advantage over other companies;

b.

Information which, if used by a competitor, would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product;

c.

Information which reveals aspects of past, present, or future GEH customer-funded development plans and programs, resulting in potential products to GEH;

d.

Information which discloses patentable subject matter for which it may be desirable to obtain patent protection.

Aff GEH-SSES-AEP-353 Affidavit Page I of 3

The information sought to be withheld is considered to be proprietary for the reasons set forth in paragraphs (4)a. and (4)b. above.

(5)

To address 10 CFR 2.390(b)(4), the information sought to be withheld is being submitted to NRC in confidence. The information is of a sort customarily held in confidence by GEH, and is in fact so held. The information sought to be withheld has, to the best of my knowledge and belief, consistently been held in confidence by GEH, no public disclosure has been made, and it is not available in public sources. All disclosures to third parties, including any required transmittals to NRC, have been made, or must be made, pursuant to regulatory provisions or proprietary agreements which provide for maintenance of the information in confidence. Its initial designation as proprietary information, and the subsequent steps taken to prevent its unauthorized disclosure, are as set forth in paragraphs (6) and (7) following.

(6)

Initial approval of proprietary treatment of a document is made by the manager of the originating component, the person most likely to be acquainted with the value and sensitivity of the information in relation to industry knowledge, or subject to the terms under which it was licensed to GEH. Access to such documents within GEH is limited on a "need to know" basis.

(7)

The procedure for approval of external release of such a document typically requires review by the staff manager, project manager, principal scientist, or other equivalent authority for technical content, competitive effect, and determination of the accuracy of the proprietary designation. Disclosures outside GEH are limited to regulatory bodies, customers, and potential customers, and their agents, suppliers, and licensees, and others with a legitimate need for the information, and then only in accordance with appropriate regulatory provisions or proprietary agreements.

(8)

The information identified in paragraph (2) above is classified as proprietary because it contains results and details of structural analysis methods and techniques developed by GEH for evaluations of BWR reactor vessels. Development of these methods, techniques, and information and their application to the design, modification, and analyses methodologies and processes for the BWR reactor vessels was achieved at a significant cost to GEH.

The development of the evaluation process along with the interpretation and application of the analytical results is derived from the extensive experience database that constitutes a major GEH asset.

(9)

Public disclosure of the information sought to be withheld is likely to cause substantial harm to GEH's competitive position and foreclose or reduce the availability of profit-making opportunities. The information is part of GEH's comprehensive BWR safety and technology base, and its commercial value extends beyond the original development cost.

The value of the technology base goes beyond the extensive physical database and analytical methodology and includes development of the expertise to determine and apply AffGEH-SSES-AEP-353 Affidavit Page 2 of 3

the appropriate evaluation process. In addition, the technology base includes the value derived from providing analyses done with NRC-approved methods.

The research, development, engineering, analytical and NRC review costs comprise a substantial investment of time and money by GEH.

The precise value of the expertise to devise an evaluation process and apply the correct analytical methodology is difficult to quantify, but it clearly is substantial.

GEH's competitive advantage will be lost if its competitors are able to use the results of the GEH experience to normalize or verify their own process or if they are able to claim an equivalent understanding by demonstrating that they can arrive at the same or similar conclusions.

The value of this information to GEH would be lost if the information were disclosed to the public. Making such information available to competitors without their having been required to undertake a similar expenditure of resources would unfairly provide competitors with a windfall, and deprive GEH of the opportunity to exercise its competitive advantage to seek an adequate return on its large investment in developing and obtaining these very valuable analytical tools.

I declare under penalty of perjury that the foregoing affidavit and the matters stated therein are true and correct to the best of my knowledge, information, and belief.

Executed on this 19th day of November 2008.

F James F. Harrison Vice President, Fuels Licensing, Regulatory Affairs GE-Hitachi Nuclear Energy Americas LLC Aff GEH-SSES-AEP-353 Affidavit Page 3 of 3

Attachment to PLA-6441 Dissolved Oxygen Data To Support Response to RAI 4.3-9

Attachment to PLA-6441 Page 1 of 20 Unit 1 Dissolved Oxygen (DO) Data - 1994 Unit 2 Dissolved Oxygen (DO) Data -1994 Reactor Water JFeedwater ______[Reactor Water

[Feedwater Date/Time J__DO, ppb_

Date/Time TDO, ppb Date/Time

ý DO:, ppb Date/Time DO, ppb 2/1/1 994 8:15 2/2/1994 8:00 2/3/1 994 7:55 2/4/1 994 7:55 2/5/1994 8:05 2/6/1 994 7:50 2/7/1 994 7:40 2/8/1994 7:45 2/9/1994 8:00 2/1 0/1 994 7:40 2/11/1 994 7:40 2/1 2/1 994 8:35 2/1 3/1 994 7:50 2/14/1 994 7:45 2/1 5/1 994 7:25 2/1 6/1 994 7:25 2/1 7/1 994 7:35 2/1 8/1 994 8:05 2/1 9/1 994 8:40 2/20/1 994 8:25 2/21/1 994 7:55 2/22/1994 7:45 2/23/1 994 7:55 2/24/1994 7:55 2/25/1 994 7:50 2/26/1 994 8:25 2/27/1 994 8:45 2/28/1 994 8:10 3/1/1 994 7:50 3/2/1 994 8:10 3/3/1 994 7:50 3/4/1 994 7:55 3/5/1994 8:25 3/6/1994 8:40 215 221 222 225 225 227 227 228 229 230 229 176.6 186.5 193.3 196 192 232 231 230 233 235 233 240 234 234 237 233 236 234 234 236 234 237 235 2/1/1 994 8:15 2/2/1 994 8:00 2/3/1 994 7:55 2/4/1 994 7:55 2/5/1 994 8:05 2/6/1 994 7:50 2/7/1 994 7:40 2/8/1 994 7:45 2/9/1 994 8:00 2/1 0/1 994 7:40 2/11/1 994 7:40 2/1 2/1 994 8:35 2/1 3/1 994 7:50 2/1 4/1 994 7:45 2/1 5/1 994 7:25 2/1 6/1 994 7:25 2/1 7/1 994 7:35 2/1 8/1 994 8:05 2/1 9/1 994 8:40 2/20/1 994 8:25 2/21/1 994 7:55 2/22/1 994 7:45 2/23/1 994 7:55 2/24/1 994 7:55 2/25/1 994 7:50 2/26/1 994 8:25 2/27/1 994 8:45 2/28/1 994 8:10 3/1/1 994 7:50 3/2/1 994 8:10 3/3/1 994 7:50 3/4/1 994 7:55 3/5/1994 8:25 3/6/1 994 8:40 20.8 20.9 21.1 21.1 31.1 20.8 20.9 24 24.2 24 24.2 18.35 18.27 18.5 19.3 18.4 24.3 23.6 24.9 24.7 24.4 24.5 22.6 22.3 22.6 29.6 22.6 22.3 22.6 24 23 23.1 23.2 21.6 7/1/1 994 8:55 7/2/1994 8:20 7/3/1 994 8:00 7/4/1 994 8:05 7/5/1 994 8:45 7/6/1 994 7:45 7/7/1 994 8:25 7/8/1 994 8:10 7/9/1 994 8:50 7/1 0/1 994 8:45 7/11/1994 7:45 7/1 2/1 994 7:50 7/1 3/1 994 8:10 7/1 4/1 994 7:40 7/1 5/1 994 7:30 7/1 6/1 994 9:05 7/1 7/1 994 8:50 7/1 7/1 994 8:50 7/1 8/1 994 7:50 7/1 9/1 994 7:35 7/20/1994 8:25 7/21/1 994 8:20 7/22/1994 7:55 7/23/1 994 8:50 7/24/1994 8:35 7/25/1 994 7:45 7/26/1 994 7:30 7/27/1 994 8:00 7/28/1 994 8:05 7/29/1 994 7:40 7/30/1 994 7:20 7/31/1 994 8:35 8/1 /1 994 7:55 8/2/1 994 8:55 243 244 244 241 248 245 245 240 239 238 238 238 257 256 254 258 255 255 256 254 255 255 255 255 254 256 256 257 258 254 256 256 255 255 7/1/1 994 8:15,5 7/2/1994 8:20 7/3/1994 8:00 7/4/1994 8:05 7/5/1 994 8:45 7/6/1 994 7:45 7/7/1 994 8:25 7/8/1 994 8:10 7/9/1 994 8:50 7/1 0/1 994 8:45 7/11/1 994 7:45 7/1 2/1 994 7:50 7/1 3/1 994 8:10 7/1 4/1 994 7:40 7/1 5/1 994 7:30 7/1 6/1 994 9:05 7/1 7/1 994 8:50 7/1 8/1 994 7:50 7/1 9/1 994 7:35 7/20/1 994 8:25 7/21/1 994 8:20 7/22/1 994 7:55 7/23/1 994 8:50 7/24/1 994 8:35 7/25/1 994 7:45 7/126/1 994 7:30 7/27/1 994 8:00 7/28/1 994 8:05 7/29/1 994 7:40 7/30/1 994 7:20 7/31/1 994 8:35 8/1 /1 994 7:55 8/2/1 994 8:55 8/3/1 994 8:30 42.2 42.8 41.6 41.7 42 42.8 41.1 42.9 43.2 41.5 41 41.6 41.4 42 42.2 41.8 41.4 41.4 40.9 41 41.8 40.2 40.4 39.6 39.8 41.7 43.2 42 41.7 43.2 42.1 41.4 42.1 42

=1

Attachment to PLA-6441 Page 2 of 20 Unit 1 Dissolved Oxygen (DO) Data - 1994 Uni t 2 Dissolved Oxygen (DO) Data - 1994 Reactor Water Feedwater Reactor Water Feedwater Date/Time DO, ppb Date/Time

]_DO, ppb Date/Time

[DO, ppb Date/Time DO, ppb 3/7/1 994 7:30 3/8/1994 7:45 3/9/1 994 7:50 3/1 0/1 994 7:40 3/11/1994 8:10 3/1 2/1 994 7:45 3/1 3/1 994 8:15 3/1 4/1 994 7:50 3/1 5/1 994 7:30 3/1 6/1 994 8:50 3/1 7/1 994 7:55 3/1 8/1 994 7:50 3/1 9/1 994 8:00 3/20/1 994 8:10 3/21/1 994 8:40 3/22/1 994 8:00 3/23/1 994 7:40 3/24/1 994 7:45 3/25/1 994 7:45 3/26/1 994 8:15 3/27/1 994 8:00 3/28/1 994 7:35 3/29/1 994 7:45 3/30/1994 8:45 3/31/1 994 7:50 4/1/1 994 8:15 4/2/1 994 8:40 4/3/1 994 8:35 4/4/1 994 8:45 4/5/1 994 8:00 4/6/1 994 7:50 4/7/1 994 8:00 4/8/1 994 7:45 4/9/1 994 8:05 233 234 234 233 233 233 233 235 234 234 240 236 202 261 237 248 242 243 238 240 241 236 238 237 238 240 241 236 241 234 238 240 235 234 3/7/1 994 7:30 3/8/1 994 7:45 3/9/1 994 7:50 3/10/1994 7:40 3/11/1994 8:10 3/12/1994 7:45 3/1 3/1 994 8:15 3/1 4/1 994 7:50 3/15/1994 7:30 3/1 6/1 994 8:50 3/17/1994 7:55 3/1 8/1 994 7:50 3/1 9/1 994 8:00 3/20/1 994 8:10 3/21/1994 8:40 3/22/1 994 8:00 3/23/1 994 7:40 3/24/1 994 7:45 3/25/1 994 7:45 3/26/1 994 8:15 3/27/1 994 8:00 3/28/1 994 7:35 3/29/1 994 7:45 3/30/1 994 8:45 3/31/1994 7:50 4/2/1 994 8:40 4/3/1 994 8:35 4/4/1 994 8:45 4/5/1 994 8:00 4/6/1 994 7:50 4/7/1 994 8:00 4/8/1 994 7:45 4/9/1 994 8:05 4/1 0/1 994 8:00 25.9 26 25.7 25.8 24.9 25 24.9 26.4 27 26.1 26.2 27.6 20.4 26.6 26 27.3 27.2 25 23.5 26.6 25.8 25.5 26.2 26.9 25.9 26.5 26 26 28.8 30.1 26.2 25.4 25.8 25.8 8/3/1 994 8:30 8/4/1 994 8:10 8/5/1 994 8:45 8/6/1 994 8:50 8/7/1 994 9:25 8/8/1 994 8:00 8/9/1 994 7:40 8/1 0/1 994 9:00 8/11/1 994 7:50 8/1 2/1 994 8:45 8/1 3/1 994 8:30 8/1 4/1 994 8:20 8/1 5/1 994 7:45 8/1 6/1 994 7:50 8/17/1994 7:35 8/1 8/1 994 7:45 8/1 9/1 994 7:55 8/20/1 994 2:10 8/20/1994 8:40 8/21/1 994 8:40 8/22/1 994 7:55 8/23/1 994 7:35 8/24/1994 8:20 8/25/1 994 8:00 8/26/1 994 7:25 8/27/1 994 8:30 8/28/1 994 8:10 8/29/1 994 7:35 8/30/1 994 8:05 8/31/1 994 7:35 9/1/1994 7:45 9/2/1 994 8:00 9/3/1 994 6:00 9/4/1 994 8:10 255 257 255 256 254 255 254 254 261 258 173 243 258 260 259 258 259 260 261 259 260 262 261 262 260 260 266 261 262 262 260 261 261 262 8/4/1994 8:10 8/5/1 994 8:45 8/6/1 994 8:50 8/7/1 994 9:25 8/8/1 994 8:00 8/9/1 994 7:40 8/1 0/1 994 9:00 8/11/1994 7:50 8/1 2/1 994 8:45 8/1 3/1 994 8:30 8/1 4/1 994 8:20 8/1 5/1 994 7:45 8/1 6/1 994 7:50 8/1 7/1 994 7:35 8/1 8/1 994 7:45 8/1 9/1 994 7:55 8/20/1 994 8:40 8/21/1 994 8:40 8/22/1 994 7:55 8/22/1 994 7:55 8/23/1 994 7:35 8/24/1 994 8:20 8/25/1 994 8:00 8/26/1 994 7:25 8/27/1 994 8:30 8/28/1 994 8:10 8/29/1 994 7:35 8/30/1 994 8:05 8/31/1 994 7:35 9/1/1 994 7:45 9/2/1 994 8:00 9/3/1 994 6:00 9/4/1 994 8:10 9/5/1 994 9:40 41.9 42.6 40.1 40.9 40.8 40.4 42.8 43.8 44.4 22.5 43.3 43.8 44.7 45.5 45.8 45.5 45.8 46 44.2 44.2 43.1 44.4 44.9 45.2 43.7 45.4 43 42 43 43 43 41.4 42.7 42.1

Attachment to PLA-6441 Page 3 of 20 Unit I Dissolved Oxygen (DO) Data -1994

{

Unit 2 Dissolved Oxygen (DO) Data -1994 Reactor Water Feedwater

[Reactor Water Feedwater Date/Time

_DO, ppb Date/Time DO, ppb Date/Time DO, ppb Date/Time DO, ppb 4/1 0/1 994 8:00 4/11/1994 8:25 4/1 2/1 994 8:00 4/1 3/1 994 7:45 4/1 4/1 994 7:50 4/1 5/1 994 8:25 4/1 6/1 994 8:30 4/1 7/1 994 8:15 4/1 8/1 994 7:25 4/19/1 994 7:45 4/20/1 994 0:00 4/21/1 994 7:40 4/22/1 994 7:55 4/23/1 994 7:45 4/24/1 994 8:00 4/25/1 994 7:55 4/26/1 994 7:50 4/27/1994 7:50 4/28/1 994 8:05 4/29/1994 7:50 4/30/1 994 8:35 237 237 236 240 242 235 234 234 236 237 237 236 236 236 236 236 264 264 264 268 267 4/11/1994 8:25 4/1 2/1 994 8:00 4/1 3/1 994 7:45 4/1 4/1 994 7:50 4/1 5/1 994 8:25 4/1 6/1 994 8:30 4/1 7/1 994 8:15 4/1 8/1 994 7:25 4/1 9/1 994 7:45 4/20/1 994 0:00 4/21/1 994 7:40 4/22/1 994 7:55 4/23/1 994 7:45 4/24/1 994 8:00 4/25/1 994 7:55 4/26/1994 7:50 4/27/1 994 7:50 4/28/1 994 8:05 4/29/1 994 7:50 4/30/1 994 8:35 25.6 26.3 26.4 26.3 29.5 25.9 25.5 25.4 26 25.2 25.3 25 21 21 22.1 22.2 22 20.8 21.2 20.9 9/5/1994 9:40 9/6/1 994 7:40 9/7/1 994 7:50 9/8/1 994 7:45 9/9/1 994 7:55 9/1 0/1 994 7:55 9/11/1 994 8:00 9/1 2/1 994 7:45 9/1 3/1 994 9:05 9/1 4/1 994 8:05 9/1 5/1 994 7:45 9/1 6/1 994 7:40 9/17/1994 9:15 9/1 8/1 994 7:45 9/1 9/1 994 7:40 9/20/1 994 7:50 9/21/1 994 8:15 9/22/1994 7:40 9/23/1 994 7:45 9/24/1 994 9:50 9/25/1 994 9:25 9/26/1 994 7:30 9/27/1 994 7:25 9/28/1 994 8:15 9/29/1 994 7:35 9/30/1994 8:05 262 261 261 261 262 263 263 263 263 262 262 262 261 261 262 262 262 261 261 261 261 261 261 262 262 262 9/6/1994 7:40 9/7/1 994 7:50 9/8/1 994 7:45 9/9/1 994 7:55 9/1 0/1 994 7:55 9/11/1994 8:00 9/1 2/1 994 7:45 9/1 3/1 994 9:05 9/1 4/1 994 8:05 9/1 5/1 994 7:45 9/1 6/1 994 7:40 9/1 7/1 994 9:15 9/1 8/1 994 7:45 9/1 9/1 994 7:40 9/20/1 994 7:50 9/21/1 994 8:15 9/22/1 994 7:40 9/23/1 994 7:45 9/24/1 994 9:50 9/25/1 994 9:25 9/26/1 994 7:30 9/27/1 994 7:25 9/28/1 994 8:15 9/29/1 994 7:35 9/30/1 994 8:05 45.3 46.9 41.3 46.1 42 42 41.5 41.9 43.2 42 42.6 42.5 41.1 40.7 39.8 41.1 41.9 41.8 43.3 41.9 42 41.7 40.7 41.3 40.3 AVERAGE = 1234 IAVERAGE

274][

AVERAGE = I256 [AVERAGE= I42

Attachmnent to PLA-6441 Page 4 of 20 Unit 1 Dissolved Oxygen (DO) Data - 1996 Unit 2 Dissolved Oxygen (DO) Data - 1996 Reactor Water

]Feedwater Reactor Water Feedwater Date/Time

]_DO, ppb_

Date/Time DO, ppb Date/Time

_DO, ppb Date/Time JDO, ppb 1/1/1 996 9:20 1/2/1 996 7:50 1/3/1 996 7:55 1/4/1 996 7:35 1/5/1 996 8:00 1/6/1 996 8:35 1/7/1 996 9:10 1/8/1 996 4:55 1/9/1996 8:20 1/1 0/1 996 7:30 1/11/1 996 7:30 1/1 2/1 996 7:40 1/1 3/1 996 8:30 1/14/1 996 8:10 1/1 5/1 996 8:25 1/1 6/1 996 7:30 1/1 7/1 996 8:10 1/1 8/1 996 7:55 1/1 9/1 996 7:50 1/20/1 996 7:40 1/21/1 996 8:40 1/22/1 996 7:55 1/23/1 996 7:25 1/24/1 996 7:45 1/25/1 996 7:30 1/26/1 996 8:10 1/27/1 996 9:00 1/28/1 996 10:30 1/29/1 996 8:30 1/30/1 996 7:40 1/31/1 996 7:55 2/1/1 996 7:45 2/2/1 996 8:05 2/3/1 996 8:55 296 295 296 296 295 263 261 260 261 268 268 268 266 274 272 271 272 273 272 270 270 269 269 272 270 270 270 269 272 268 269 268 269 268 1/1 /1 996 9:20 1/2/1 996 7:50 1/3/1 996 7:55 1/4/1 996 7:35 1/5/1 996 8:00 1/6/1 996 8:35 1/7/1 996 9:10 1/8/1 996 4:55 1/9/1 996 8:20 1/1 0/1 996 7:30 1/11/1 996 7:30 1/1 2/1 996 7:40 1/1 3/1 996 8:30 1/14/1 996 8:10 1/1 5/1 996 8:25 1/1 6/1 996 7:30 1/1 7/1 996 8:10 1/1 8/1 996 7:55 1/1 9/1 996 7:50 1/20/1 996 7:40 1/21/1 996 8:40 1/22/1 996 7:55 1/23/1 996 7:25 1/24/1 996 7:45 1/25/1 996 7:30 1/26/1 996 8:10 1/27/1 996 9:00 1/28/1 996 10:30 1/29/1 996 8:30 1/30/1 996 7:40 1/31/1 996 7:55 2/1 /1 996 7:45 2/2/1 996 8:05 2/3/1 996 8:55 28 27 26.5 27 26 26.3 26.5 27.2 26.6 27.3 26 27.7 26 28.4 27.6 2.5.9 32.9 29.7 29.5 27.1 27.2 26.9 27.3 28.7 27.2 27.5 29.7 28.9 27.9 29.1 27.6 26.5 27 27.2 1/1/1 996 9:40 1/2/1 996 8:25 1/3/1 996 7:45 1/4/1 996 8:20 1/5/1 996 8:15 1/6/1 996 8:45 1/7/1 996 9:30 1/8/1 996 4:35 1/9/1 996 7:50 1/1 0/1 996 7:45 1/11/1 996 7:40 1/1 2/1 996 7:50 1/1 3/1 996 8:55 1/1 4/1 996 8:20 1/1 5/1 996 8:35 1/1 6/1 996 7:50 1/1 7/1 996 7:50 1/1 8/1 996 7:30 1/1 9/1 996 8:05 1/20/1 996 7:50 1/21/1 996 8:30 1/22/1 996 7:55 1/23/1 996 7:40 1/24/1 996 7:50 1/25/1 996 7:35 1/26/1 996 7:45 1/27/1 996 9:05 1/28/1 996 10:15 1/29/1 996 7:55 1/30/1 996 7:30 1/31/1 996 7:35 2/1 /1 996 7:35 2/2/1 996 7:50 2/3/1 996 9:10 247 244 245 245 243 242 244 245 245 245 245 245 245 246 246 245 245 246 249 250 249 245 247 248 249 245 253 247 248 246 245 245 248 247 1/1/1 996 9:40 1/2/1 996 8:25 1/3/1 996 7:45 1/4/1 996 8:20 1/5/1 996 8:15 1/6/1 996 8:45 1/7/1 996 9:30 1/8/1 996 4:35 1/9/1 996 7:50 1/1 0/1 996 7:45 1/11/1 996 7:40 1/1 2/1 996 7:50 1/1 3/1 996 8:55 1/1 4/1 996 8:20 1/1 5/1 996 8:35 1/1 6/1 996 7:50 1/1 7/1 996 7:50 1/1 8/1 996 7:30 1/1 9/1 996 8:05 1/20/1 996 7:40 1/21/1 996 8:30 1/22/1 996 7:55 1/23/1996 7:40 1/24/1 996 7:50 1/25/1 996 7:35 1/26/1 996 7:45 1/27/1 996 9:0.5 1/28/1 996 10:15 1/29/1 996 7:55 1/30/1 996 7:30 1/31/1 996 7:35 2/1/1 996 7:35 2/2/1 996 7:50 2/3/1 996 9:10 26 25.6 25.4 25.1 25.4 25.4 25.9 25.7 25.4 25.7 25.4 26.2 25.7 26.1 26.3 25.7 25.9 27.2 30.2 29.1 25.8 25.4 25.7 27 30.1 29.7 35.3 28.1 30 30.6 28.4 28 29.7 28.6

Attachment to PLA-6441 Page 5 of 20 Unit 1 Dissolved Oxygen (DO) Data - 1996 Unit 2 Dissolved Oxygen (DO) Data - 1996 Reactor Water

]Feedwater Reactor Water Feedwater Date/Time

]DO, ppb Date/Time jDO, ppb Date/Time DO, ppb Date/Time EDO, ppb 2/4/1 996 9:40 2/5/1 996 7:30 2/6/1 996 7:35 2/7/1 996 7:50 2/8/1 996 7:40 2/9/1 996 7:40 2/1 0/1 996 8:55 2/11/1996 9:00 2/1 2/1 996 7:35 2/1 3/1 996 7:25 2/1 4/1 996 7:25 2/1 5/1 996 8:15 2/1 6/1 996 7:30 2/1 7/1 996 7:50 2/1 8/1 996 7:40 2/1 9/1 996 8:20 2/20/1 996 7:45 2/21/1 996 8:00 2/22/1 996 7:45 2/23/1 996 7:45 2/24/1996 10:30 2/25/1 996 9:15 2/26/1 996 8:20 2/27/1 996 7:45 2/28/1 996 7:50 2/29/1 996 7:50 3/1/1 996 8:05 3/2/1 996 8:30 3/3/1 996 8:45 3/4/1 996 8:10 3/5/1 996 7:40 3/6/1 996 7:35 3/7/1 996 8:00 3/8/1 996 8:05 268 267 269 270 270 272 270 272 272 273 271 271 272 271 271 272 272 272 284 282 282 282 283 284 281 278 279 277 277 279 283 288 281 286 2/4/1 996 9:40 2/5/1 996 7:30 2/6/1 996 7:35 2/7/1 996 7:50 2/8/1 996 7:40 2/9/1 996 7:40 2/1 0/1 996 8:55 2/11/1996 9:00 2/12/1996 7:35 2/1 3/1 996 7:25 2/1 4/1 996 7:25 2/1 5/1 996 8:15 2/1 6/1 996 7:30 2/1 7/1 996 7:50 2/1 8/1 996 7:40 2/1 9/1 996 8:20 2/20/1 996 7:45 2/21/1 996 8:00 2/22/1 996 7:45 2/23/1 996 7:45 2/24/1 996 10:30 2/25/1 996 9:15 2/26/1 996 8:20 2/27/1 996 7:45 2/28/1 996 7:50 2/29/1 996 7:50 3/1/1 996 8:05 3/2/1 996 8:30 3/3/1 996 8:45 3/4/1 996 8:10 3/5/1 996 7:40 3/6/1 996 7:35 3/7/1 996 8:00 3/8/1 996 8:05 27.1 26.1 26.5 27.7 28.8 29.3 27.9 29 26.6 25.9 26.9 27.7 26.6 26.7 27.4 27.4 29.3 30 30.8 31.2 29.7 30.5 34.8 33.4 35.1 27.2 27.1 29 27.7 31.9 36.1 36.9 35.3 27.2 2/4/1 996 9:25 2/5/1 996 7:50 2/6/1 996 7:50 2/7/1 996 7:45 2/8/1 996 7:55 2/9/1 996 7:50 2/1 0/1 996 8:45 2/11/1996 8:50 2/1 2/1 996 7:50 2/1 3/1 996 7:30 2/1 4/1 996 7:50 2/1 5/1 996 8:05 2/1 6/1 996 7:40 2/1 7/1 996 8:00 2/1 8/1 996 7:50 2/1 9/1 996 8:40 2/20/1996 7:45 2/21/1 996 7:40 2/22/1996 7:40 2/23/1996 7:50 2/24/1 996 10:15 2/25/1 996 9:10 2/26/1 996 8:00 2/27/1 996 8:30 2/28/1 996 8:15 2/29/1 996 8:00 3/1/1 996 8:10 3/2/1 996 8:45 3/3/1 996 9:00 3/4/1 996 8:00 3/5/1 996 7:45 3/6/1 996 7:45 3/7/1 996 7:45 3/8/1 996 8:15 249 244 245 247 246 245 196 236 247 250 247 249 249 244 248 251 250 250 250 250 253 255 255 255 252 251 255 249 250 247 247 255 248 253 2/4/1 996 9:25 2/5/1 996 7:50 2/6/1 996 7:50 217/1 996 7:45 2/8/1 996 7:55 2/9/1 996 7:50 2/1 0/1 996 8:45 2/11/1996 8:50 2/1 2/1 996 7:50 2/1 3/1 996 7:30 2/1 4/1 996 7:50 2/1 5/1 996 8:05 2/1 6/1 996 7:40 2/1 7/1 996 8:00 2/1 8/1 996 7:50 2/1 9/1 996 8:40 2/20/1 996 7:45 2/21/1 996 7:40 2/22/1 996 7:40 2/23/1 996 7:50 2/24/1 996 10:15 2/25/1 996 9:10 2/26/1 996 8:00 2/27/1 996 8:30 2/28/1 996 8:15 2/29/1 996 8:00 3/1/1 996 8:10 3/2/1996 8:45 3/3/1996 9:00 3/4/1996 8:00 3/5/1 996 7:45 3/6/1 996 7:45 3/7/1 996 7:45 3/8/1 996 8:15 28.4 28.2 28.4 30.3 31.3 31.1 21.5 25.9 25.8 25.5 23.7 25.8 26.1 25 26 26.1 27.1 28.6 27.6 27.5 28.6 28.9 29.8 29.8 29.9 29.4 27 26 27.4 26.7 27.6 28.1 27.2 27

Attachment to PLA-6441 Page 6 of 20 Unit 1 Dissolved Oxygen (DO) Data -1996 Unit 2 Dissolved Oxygen (DO) Data -1996 Reactor Water Feedwater Reactor Water Feedwater Date/Time DO, ppb Date/Time I

DO, ppb aeTm~e=[DO, ppb Date/Time DO, ppb 3/9/1 996 8:30 3/1 0/1 996 8:35 3/11/1996 7:50 3/1 2/1 996 7:35 3/13/1996 9:00 3/1 4/1 996 7:25 3/1 5/1 996 9:10 3/1 6/1 996 8:55 3/1 7/1 996 8:55 3/1 8/1 996 7:50 3/1 9/1 996 7:25 3/20/1996 7:40 3/21/1 996 7:30 3/22/1 996 7:40 3/23/1 996 9:10 3/24/1 996 9:30 3/25/1 996 8:20 3/26/1 996 7:30 3/27/1 996 7:40 3/28/1 996 7:35 3/29/1 996 7:45 3/30/1 996 8:45 3/31/1 996 8:55 231 272 278 284 282 284 284 288 283 282 281 281 281 277 277 278 283 280 280 280 280 282 282 3/9/1 996 8:30 3/1 0/1 996 8:35 3/11/1 996 7:50 3/1 2/1 996 7:35 3/1 3/1 996 9:00 3/1 4/1 996 7:25 3/1 5/1 996 9:10 3/1 6/1 996 8:55 3/1 7/1 996 8:55 3/1 8/1 996 7:50 3/1 9/1 996 7:25 3/20/1 996 7:40 3/21/1 996 7:30 3/22/1 996 7:40 3/23/1 996 9:10 3/24/1 996 9:30 3/25/1 996 8:20 3/26/1 996 7:30 3/27/1 996 7:40 3/28/1 996 7:35 3/29/1 996 7:45 3/30/1 996 8:45 3/31/1 996 8:55 22.3 27.1 27.1 27.5 27.2 29.7 30.1 26.8 27 27.5 28.1 27.9 27.5 25.8 26.1 26.9 28.1 26.8 25.8 26.9 28 29 28.8 3/9/1 996 8:45 3/1 0/1 996 8:45 3/11/1 996 8:10 3/1 2/1 996 8:10 3/1 3/1 996 8:45 3/1 4/1 996 7:55 3/1 5/1 996 8:55 3/1 6/1 996 9:05 3/1 7/1 996 9:00 3/1 8/1 996 8:25 3/1 9/1 996 8:25 3/20/1 996 8:05 3/21/1 996 7:30 3/22/1 996 7:50 3/23/1 996 9:10 3/24/1 996 8:50 3/25/1 996 7:45 3/26/1 996 7:25 3/27/1 996 7:35 3/28/1 996 7:45 3/29/1 996 7:40 3/30/1 996 8:30 3/31/1 996 9:05 250 245 244 244 245 244 243 249 241 241 243 242 242 241 240 242 242 243 244 242 241 245 247 3/9/1996 8:45 3/1 0/1 996 8:45 3/11/1 996 8:10 3/1 2/1 996 8:10 3/1 3/1 996 8:45 3/1 4/1 996 7:55 3/1 5/1 996 8:55 3/1 6/1 996 9:05 3/1 7/1 996 9:00 3/1 8/1 996 8:25 3/1 9/1 996 8:25 3/20/1 996 8:05 3/21/1 996 7:30 3/22/1 996 7:50 3/23/1 996 9:10 3/24/1 996 8:50 3/25/1996 7:45 3/26/1996 7:25 3/27/1 996 7:35 3/28/1996 7:45 3/29/1 996 7:40 3/30/1 996 8:30 3/31/1 996 9:05 26.6 26.8 26.3 26.9 27.2 27.1 28.4 25.5 26.2 26.7 27.4 26.7 25.5 26.4 25.6 25.9 27 26 26.2 26 26.5 26.2 28 AVERAGE =

1

-275 AVERAGE=

2:8j AVERAGE=

246 AVERAGE=

27

Attachment to PLA-6441 Page 7 of 20 Unit 1 Dissolved Oxygen (DO) Data -1998 Unit 2 Dissolved Oxygen (DO) Data -1998 Reactor Water Feedwater_____

Reactor Water

[Feedwater Date/Time DO, ppb J DaterTime

]_DO, ppb [

Date/Ti me

[DO, ppb [

Date/Time DO, ppb 1/1/98 8:15 1/2/98 7:50 1/3/98 9:35 1/4/98 8:50 1/5/98 7:55 1/6/98 8:40 1/7/98 8:15 1/8/98 8:05 1/9/98 9:00 1/10/98 10:45 1/11/98 5:00 1/12/98 7:55 1/13/98 7:25 1/14/98 7:40 1/15/98 8:00 1/16/98 7:45 1/17/98 8:30 1/18/98 8:10 1/19/98 8:00 1/20/98 7:40 1/21/98 8:30 1/22/98 7:35 1/23/98 8:00 1/24/98 8:20 11/25/98 8:05 1/26/98 8:10 1/27/98 7:40 1/28/98 8:25 1/29/98 8:10 1/30/98 7:52 1/31/98 8:05 2/1/98 9:20 2/2/98 8:00 2/3/98 7:35 278 279 280 280 283 283 282 277 277 276 277 280 280 283 283 283 285 285 280 302 312 280 280 281 279 281 281 281 281 284 281 281 282 281 1/1/1 998 8:15 1/2/1 998 7:50 1/3/1 998 9:35 1/4/1 998 8:50 1/5/1 998 7:55 1/6/1 998 8:40 1/7/1 998 8:15 1/8/1 998 8:05 1/9/1 998 9:00 1/1 0/1 998 10:45 1/11/1 998 5:00 1/1 2/1 998 7:55 1/1 3/1 998 7:25 1/1 4/1 998 7:40 1/1 5/1 998 8:00 1/1 6/1 998 7:45 1/1 7/1 998 8:30 1/1 8/1 998 8:10 1/1 9/1 998 8:00 1/20/1 998 7:40 1/21/1 998 8:30 1/22/1 998 7:35 1/23/1 998 8:00 1/24/1 998 8:20 1/25/1 998 8:05 1/26/1 998 8:10 1/27/1 998 7:40 1/28/1 998 8:25 1/29/1998 8:10 1/30/1 998 7:52 1/31/1 998 8:05 2/1/1 998 9:20 2/2/1 998 8:00 2/3/1 998 7:35 23.6 24.9 26.4 26.3 26.1 27.4 27.9 28.7 26.3 23.7 23.3 23.5 24.9 23.5 23.9 24.3 23 22.2 23 23.8 24.6 25 24.4 24.8 23.3 24.6 25.2 24.3 24.7 25.3 24.2 24.8 25.9 24.1 1/1/98 8:25 1/2/98 8:05 1/3/98 9:20 1/4/98 8:40 1/5/98 7:55 1/6/98 7:30 1/7/98 8:05 1/8/98 7:50 1/9/98 8:35 1/10/98 10:30 1/11/98 8:35 1/12/98 8:05 1/13/98 7:30 1/14/98 7:40 1/15/98 7:35 1/16/98 7:50 1/17/98 8:40 1/18/98 8:20 1/19/98 8:00 1/20/98 7:30 1/21/98 8:15 1/22/98 7:35 1/23/98 8:00 1/24/98 8:30 1/25/98 11:35 1/26/98 8:20 1/27/98 8:10 1/28/98 9:15 1/29/98 8:40 1/30/98 8:50 1/31/98 8:15.

2/1/98 9:30 2/2/98 7:45 2/3/98 8:25 254 254 254 254 254 254 253 253 253 213 242 248 248 248 248 248 247 248 249 258 297 255 252 249 249 249 193 224 253 253 254 255 254 254 1/1/98 8:25 1/2/98 8:05 1/3/98 9:20 1/4/98 8:40 1/5/98 7:55 1/6/98 7:30 1/7/98 8:05 1/8/98 7:50 1/9/98 8:35 1/10/98 10:30 1/11/98 8:35 1/12/98 8:05 1/13/98 7:30 1/14/98 7:40 1/15/98 7:35 1/16/98 7:50 1/17/98 8:40 1/18/98 8:20 1/19/98 8:00 1/20/98 7:30 1/21/98 8:15 1/22/98 7:35 1/23/98 8:00 1/24/98 8:30 1/25/98 11:35 1/26/98 8:20 1/27/98 8:10 1/28/98 9:15 1/29/98 8:40 1/30/98 8:50 1/31/98 8:15 2/1/98 9:30 2/2/98 7:45 2/3/98 8:25 20.5 21.6 22.1 22 22.8 24.3 25.2 26.1 25.1 17.12 20.3 21 21.7 20.2 21 21.5 20.5 20.5 20.4 20.7 21.1 21.6 21.6 21.5 21.1 21.5 15.4 18.9 21.5 22.1 21.2 21.7 21.5 21.4

Attachment to PLA-6441 Page 8 of 20 Unit 1 Dissolved Oxygen (DO) Data - 1998 Unit 2 Dissolved Oxygen (DO) Data - 1998 Reactor Water JFeedwater Reactor Water

[Feedwater Date/Time

=_DO, ppb_

Date/Time IDO, ppb Date/Time IDO, ppb Date/Time DO, ppb 2/4/98 8:15 2/5/98 8:00 2/6/98 8:00 2/7/98 8:00 2/8/98 7:30 2/9/98 7:45 2/10/98 7:25 2/11/98 7:55 2/12/98 8:00 2/13/98 7:35 2/14/98 7:45 2/15/98 7:30 2/16/98 8:10 2/17/98 7:45 2/18/98 8:40 2/19/98 7:45 2/20/98 9:05 2/21/98 8:15 2/22/98 9:30 2/23/98 8:25 2/24/98 7:57 2/25/98 7:47 2/26/98 7:35 2/27/98 7:55 2/28/98 8:35 3/1/98 8:15 3/2/98 7:50 3/3/98 7:55 3/4/98 7:45 3/5/98 8:00 3/6/98 8:05 3/7/98 8:55 3/8/98 8:15 3/9/98 8:20 281 283 284 256 275 280 276 278 282 279 281 280 280 282 284 285 287 279 278 278 279 280 279 277 278 279 278 281 278 270 270 271 271 272 2/4/1 998 8:15 2/5/1998 8:00 2/6/1998 8:00 2/7/1998 8:00 2/8/1 998 7:30 2/9/1 998 7:45 2/1 0/1 998 7:25 2/11/1998 7:55 2/1 2/1 998 8:00 2/1 3/1 998 7:35 2/1 4/1 998 7:45 2/1 5/1 998 7:30 2/16/1998 8:10 2/1 7/1 998 7:45 2/1 8/1 998 8:40 2/1 9/1 998 7:45 2/20/1 998 9:05 2/21/1998 8:15 2/22/1 998 9:30 2/23/1998 8:25 2/24/1 998 7:57 2/25/1 998 7:47 2/26/1 998 7:35 2/27/1 998 7:55 2/28/1 998 8:35 3/1/1 998 8:15 3/2/1 998 7:50 3/3/1 998 7:55 3/4/1 998 7:45 3/5/1998 8:00 3/6/1998 8:05 3/7/1998 8:55 3/8/1 998 8:15 3/9/1998 8:20 24.5 25.2 23 21.4 24.6 24.8 23.7 24.1 25.9 24.2 24.1 23.4 24.9 24.9 25.8 25.8 25.7 25.7 24.9 24.4 22.5 22.8 22.7 22.7 23.7 23.6 22.5 23 24 23.5 23 24.6 24.9 26.2 2/4/98 8:10 2/5/98 7:45 2/6/98 8:05 2/7/98 8:15 2/8/98 7:35 2/9/98 8:10 2/10/98 8:10 2/11/98 7:40 2/12/98 7:50 2/13/98 8:20 2/14/98 7:55 2/15/98 7:45 2/16/98 8:10 2/17/98 8:05 2/18/98 8:50 2/19/98 7:35 2/20/98 9:20 2/20/98 9:20 2/21/98 8:30 2/22/98 9:50 2/23/98 7:55 2/24/98 7:45 2/25/98 7:40 2/26/98 7:30 2/27/98 7:40 2/28/98 8:50 3/1/98 8:25 3/2/98 7:55 3/3/98 7:55 3/4/98 7:45 3/5/98 8:00 3/6/98 8:10 3/7/98 9:05 3/8/98 8:25 253 253 253 253 253 253 252 250 250 248 248 248 249 249 248 248 248 248 248 248 248 249 248 250 249 249 249 248 248 248 247 248 237 254 2/4/98 8:10 2/5/98 7:45 2/6/98 8:05 2/7/98 8:15 2/8/98 7:35 2/9/98 8:10 2/10/98 8:10 2/11/98 7:40 2/12/98 7:50 2/13/98 8:20 2/14/98 7:55 2/15/98 7:45 2/16/98 8:10 2/17/98 8:05 2/18/98 8:50 2/19/98 7:35 2/20/98 9:20 2/21/98 8:30 2/22/98 9:560 2/23/98 7:55 2/24/98 7:45 2/25/98 7:40 2/26/98 7:30 2/27/98 7:40 2/28/98 8:50 3/1/98 8:25 3/2/98 7:55 3/3/98 7:55 3/4/98 7:45 3/5/98 8:00 3/6/98 8:10 3/7/98 9:05 3/8/98 8:25 3/9/98 8:00 21.7 22.3 20.7 22.1 21.9 23.9 22.1 21.7 23.3

--21.2 21.3 20.9 21.7 28 22.5 22.5 22.1 22 21.9 21.4 21.1 21.8 24.1 21.1 22.7 22.3 21.2 21.1 21.3 21 21 19.3 22.1 23.7

Attachment to PLA-6441 Page 9 of 20 Unit I Dissolved Oxygen (DO) Data - 1998 Unit 2 Dissolved Oxygen (DO) Data - 1998 Reactor Water Feedwater Reactor Water Feedwater Date/Time DO, ppb Date/Time DO, ppb Date/Time DO, ppb Date/Time DO, ppb 3/10/98 7:35 3/11/98 8:25 3/12/98 8:20 3/13/98 7:55 3/14/98 8:50 3/15/98 7:35 3/16/98 8:10 3/17/98 7:35 3/18/98 9:00 3/19/98 7:45 3/20/98 8:30 3/21/98 8:20 3/22/98 7:40 3/23/98 7:45 3/24/98 7:40 3/25/98 7:55 3/26/98 7:50 3/27/98 8:30 3/28/98 10:40 3/29/98 8:00 3/30/98 7:45 3/31/98 7:45 273 273 274 274 275 276 271 271 270 270 270 272 271 273 274 273 275 275 274 273 273 272 3/10/1998 7:35 3/11/1998 8:25 3/12/1998 8:20 3/13/1998 7:55 3/14/1998 8:50 3/15/1998 7:35 3/16/1998 8:10 3/17/1998 7:35 3/18/1998 9:00 3/19/1998 7:45 3/20/1998 8:30 3/21/1998 8:20 3/22/1998 7:40 3/23/1998 7:45 3/24/1998 7:40 3/25/1998 7:55 3/26/1998 7:50 3/27/1998 8:30 3/28/1998 10:40 3/29/1998 8:00 3/30/1998 7:45 3/31/1998 7:45 24.4 22.8 23.2 23.8 24.7 25.5 24.2 24.2 24.1 24.4 24.7 24.2 23.6 23.2 23.1 23.7 24.5 25.8 27.2 26.4 25.5 25.7 3/9/98 8:00 3/10/98 9:30 3/11/98 8:20 3/12/98 8:20 3/13/98 8:00 3/14/98 9:05 3/15/98 7:45 3/16/98 7:40 3/17/98 7:35 3/18/98 8:30 3/19/98 7:25 3/20/98 7:25 3/21/98 8:10 3/22/98 7:30 3/23/98 7:50 3/24/98 7:35 3/25/98 7:55 3/26/98 7:35 3/27/98 7:55 3/28/98 10:50 3/29/98 8:10 3/30/98 8:05 3/31/98 8:00 256 257 257 257 257 257 257 256 256 256 255 256 256 256 255 255 259 255 256 254 256 253 253 3/10/98 9:30 3/11/98 8:20 3/12/98 8:20 3/13/98 8:00 3/14/98 9:05 3/15/98 7:45 3/16/98 7:40 3/17/98 7:35 3/18/98 8:30 3/19/98 7:25 3/20/98 7:25 3/21/98 8:10 3/22/98 7:30 3/23/98 7:50 3/24/98 7:35 3/25/98 7:55 3/26/98 7:35 3/27/98 7:55 3/28/98 10:50 3/29/98 8:10 3/30/98 8:05 3/31/98 8:00 21.5 21.3 21.4 19.5 19.5 22.9 19.7 22 21.9 22.1 22.5 23.3 21.1 21.1 21.1 21.7 22.3 24.8 26.5 36.4 25.1 25.7 AVERAGE =

278 AVERAGE =

24 j

AVERAGE =

251

[AVERAGE =

22

Attachmnent to PLA-6441 Page 10 of 20 Unit I Dissolved Oxygen (DO) Data -2000 Unit 2 Dissolved Oxygen (DO) Data -2000 Reactor Water Feedwater_____[

Reactor Water Feedwater Date/Time D O, ppb I Date/Time JDO, ppb Date/Time

[DO, ppb Date/Time

]DO, ppb 6/1/2000 7:35 6/2/2000 7:30 6/3/2000 8:30 6/4/2000 8:05 6/5/2000 8:00 6/6/2000 7:30 6/7/2000 8:30 6/8/2000 8:05 6/9/2000 7:35 6/10/2000 9:35 6/11/2000 7:45 6/12/2000 7:35 6/13/2000 7:45 6/14/2000 7:58 6/15/2000 8:35 6/16/2000 8:48 6/17/2000 8:50 6/18/2000 8:45 6/19/2000 7:50 6/20/2000 7:45 6/21/2000 7:35 6/22/2000 8:00 6/23/2000 8:15 6/24/2000 8:20 6/25/2000 8:25 6/26/2000 7:45 6/27/2000 7:30 6/28/2000 8:20 6/29/2000 7:40 6/30/2000 7:45 7/1/2000 8:30 7/2/2000 8:20 7/3/2000 8:15 7/4/2000 8:15 0.13 0.14 0.15 0.13 0.14 0.15 0.18 0.18 0.19 0.19 0.2 0.18 0.16 0.17 0.15 0.14 0.17 0.17 0.16 0.17 0.12 0.12 0.11 0.19 0.12 0.17 0.29 0.15 0.13 0.13 0.15 0.13 0.16 0.19 6/1/2000 7:35 6/2/2000 7:30 6/3/2000 8:30 6/4/2000 8:05 6/5/2000 8:00 6/6/2000 7:30 6/7/2000 8:30 6/8/2000 8:05 6/9/2000 7:35 6/10/2000 9:35 6/11/2000 7:45 6/12/2000 7:35 6/13/2000 7:45 6/14/2000 7:58 6/15/2000 8:35 6/16/2000 8:48 6/17/2000 8:50 6/18/2000 8:45 6/19/2000 7:50 6/20/2000 7:45 6/21/2000 7:35 6/22/2000 8:00 6/23/2000 8:15 6/24/2000 8:20 6/25/2000 8:25 6/26/2000 7:45 6/27/2000 7:30 6/28/2000 8:20 6/29/2000 7:40 6/30/2000 7:45 7/1/2000 8:30 7/2/2000 8:20 7/3/2000 8:15 7/4/2000 8:15 49.7 47.9 52 50.2 50.3 49.9 52.5 51.9 50.6 51.7 47 48.5 51.3 51.8 48.9 48.2 46.6 52.4 52.1 49.5 49.4 47.6 50.8 50.9 48.4 48.6 48.3 49.4 49.8 50.8 49.1 50 49 49.7 6/1/2000 7:30 6/2/2000 7:35 6/3/2000 8:15 6/4/2000 7:55 6/5/2000 8:15 6/6/2000 7:45 6/7/2000 8:15 6/8/2000 8:20 6/9/2000 8:20 6/10/2000 9:45 6/11/2000 8:00 6/12/2000 7:55 6/13/2000 7:40 6/14/2000 8:00 6/15/2000 8:35 6/16/2000 8:50 6/17/2000 9:00 6/18/2000 9:05 6/19/2000 13:19 6/20/2000 8:20 6/21/2000 8:15 6/22/2000 8:00 6/23/2000 8:20 6/24/2000 9:50 6/25/2000 8:15 6/26/2000 7:55 6/27/2000 7:40 6/28/2000 8:05 6/29/2000 7:40 6/30/2000 7:45 7/1/2000 8:45 7/2/2000 8:35 7/3/2000 9:15 7/4/2000 8:00 0.42 0.42 0.37 0.38 0.36 0.36 0.48 0.57 0.68 0.71 0.74 0.75 0.74 0.72 0.73 0.71 0.73 0.81 0.66 0.66 0.54 0.54 0.55 0.58 0.59 0.62 0.6 0.7 0.67 0.65 2.53 2.39 1.65 2.51 6/1/2000 7:30 6/2/2000 7:35 6/3/2000 8:15 6/4/2000 7:55 6/5/2000 8:15 6/6/2000 7:45 6/7/2000 8:15 6/8/2000 8:20 6/9/2000 8:20 6/10/2000 9:45 6/11/2000 8:00 6/12/2000 7:55 6/13/2000 7:40 6/14/2000 8:00 6/15/2000 8:35 6/16/2000 8:50 6/17/2000 9:00 6/18/2000 9:05 6/19/2000 13:19 6/20/2000 8:20 6/21/2000 8:15 6/22/2000 8:00 6/23/2000 8:20 6/24/2000 9:50 6/25/2000 8:15 6/26/2000 7:55 6/27/2000 7:40 6/28/2000 8:05 6/29/2000 7:40 6/30/2000 7:45 7/1/2000 8:45 7/2/2000 8:35 7/3/2000 9:15 7/4/2000 8:00 36.2 34.1 35.5 37.1 35.7 34.8 33.9 31.4 32.7 32.4 33.7 32.8 33.8 33.9 31.9 32.4 34.9 35.

34.1 33.6 34.5 33 33.6 34.6 35 36 35.4 37.3 37.7 37.4 36.6 36.6 38.5 36

Attachment to PLA-6441 Page 11I of 20 Unit I Dissolved Oxygen (DO) Data -2000 Unit 2 Dissolved Oxygen (DO) Data -2000 Reactor Water I

Feedwater Reactor Water Feedwater Date/Time

]_DO, p~p~b_

Date/Time TDO, ppb Date/Time DO, ppb Date/Time

[DO, ppb 7/5/2000 7:55 7/6/2000 7:50 7/7/2000 7:55 7/8/2000 9:40 7/9/2000 9:35 7/10/2000 7:50 7/11/2000 8:50 7/12/2000 9:00 7/13/2000 7:45 7/14/2000 7:35 7/15/2000 8:20 7/16/2000 8:15 7/17/2000 8:00 7/17/2000 8:00 7/18/2000 7:35 7/19/2000 8:25 7/20/2000 7:55 7/21/2000 7:35 7/22/2000 9:35 7/23/2000 9:30 7/24/2000 7:40 7/25/2000 8:05 7/26/2000 8:40 7/27/2000 7:45 7/28/2000 7:40 7/29/2000 9:05 7/30/2000 9:20 7/31/2000 8:05 8/1/2000 8:25 8/2/2000 7:45 8/3/2000 8:15 8/4/2000 8:15 8/5/2000 8:55 8/6/2000 7:55 0.18 0.19 0.25 0.34 0.55 0.42 0.31 0.32 0.68 0.29 0.3 0.35 0.35 0.35 0.39 0.32 0.28 0.27 0.27 0.28 0.28 0.29 0.28 0.29 0.29 0.3 0.29 0.3 0.29 0.28 0.29 0.29 0.17 0.17 7/5/2000 7:55 7/6/2000 7:50 7/7/2000 7:55 7/8/2000 9:40 7/9/2000 9:35 7/10/2000 7:50 7/11/2000 8:50 7/12/2000 9:00 7/13/2000 7:45 7/14/2000 7:35 7/15/2000 8:20 7/16/2000 8:15 7/17/2000 8:00 7/17/2000 8:00 7/18/2000 7:35 7/19/2000 8:25 7/20/2000 7:55 7/21/2000 7:35 7/22/2000 9:35 7/23/2000 9:30 7/24/2000 7:40 7/25/2000 8:05 7/26/2000 8:40 7/27/2000 7:45 7/28/2000 7:40 7/29/2000 9:05 7/30/2000 9:20 7/31/2000 8:05 8/1/2000 8:25 8/2/2000 7:45 8/3/2000 8:15 8/4/2000 8:15 8/5/2000 8:55 8/6/2000 7:55 50.7 44.6 44.2 44.6 43.8 41.3 44.8 49.3 49.7 46.3 45.7 44.9 44.3 44.3 43.2 44.3 44.2 41.9 44.8 45.4 43.6 44.9 43.7 43.4 39.7 41.9 39.4 43.5 41.6 41.9 40.7 42.1 46.2 47 7//008:05 7/6/2000 8:20 7/7/2000 8:10 7/8/2000 9:30 7/9/2000 9:25 7/10/2000 8:00 7/11/2000 8:05 7/12/2000 8:30 7/13/2000 8:05 7/14/2000 8:00 7/15/2000 8:15 7/16/2000 8:25 7/17/2000 7:50 7/18/2000 7:40 7/19/2000 7:45 7/20/2000 7:45 7/21/2000 8:10 7/22/2000 9:45 7/23/2000 9:10 7/24/2000 7:55 7/25/2000 7:30 7/26/2000 8:20 7/27/2000 7:40 7/28/2000 7:45 7/29/2000 8:25 7/30/2000 9:05 7/31/2000 7:45 8/1/2000 7:55 8/2/2000 7:35 8/3/2000 7:50 8/4/2000 7:40 8/5/2000 8:45 8/6/2000 8:05 8/7/2000 8:00 2.42 1.83 1.93 1.97 2.03 2.22 0.59 0.88 1.21 1.31 1.43 1.59 1.76 2.18 2.43 2.76 3.18 11.78 9.07 0.31 0.25 0.25 0.25 0.26 0.27 0.31 0.32 0.33 0.34 0.37 0.4 0.59 0.6 0.59 7/5/2000 8:05 7/6/2000 8:20 7/7/2000 8:10 7/8/2000 9:30 7/9/2000 9:25 7/10/2000 8:00 7/11/2000 8:05 7/12/2000 8:30 7/13/2000 8:05 7/14/2000 8:00 7/15/2000 8:15 7/16/2000 8:25 7/17/2000 7:50 7/18/2000 7:40 7/19/2000 7:45 7/20/2000 7:45 7/21/2000 8:10 7/22/2000 9:45 7/23/2000 9:10 7/24/2000 7:55 7/25/2000 7:30 7/26/2000 8:20 7/27/2000 7:40 7/28/2000 7:45 7/29/2000 8:25 7/30/2000 9:05 7/31/2000 7:45 8/1/2000 7:55 8/2/2000 7:35 8/3/2000 7:50 8/4/2000 7:40 8/5/2000 8:45 8/6/2000 8:05 8/7/2000 8:00 32.5 34.6 33.4 35.7 32.1 34.5 31.4 31.9 33.7 31.8 33.5 32.6 34.5 44.9 41.3 44.4 36.8 36.7 45.8 44.6 46.9 44.4 44.4 45.2 43.5 42.6 47.5 45 46.6 46.9 45.5 44.4 42.9

Attachment to PLA-6441 Page 12 of 20 Unit I Dissolved Oxygen (DO) Data - 2000 Unit 2 Dissolved Oxygen (DO) Data - 2000 Reactor Water Feedwater Reactor Water Feedwater Date/Time DO, ppb Date/Time DO, ppb Date/Time

[ DO, ppb Date/Time DO, ppb 8/7/2000 7:50 0.21 8/7/2000 7:50 45 8/8/2000 8:10 0.75 8/8/2000 8:10 43.8 8/8/2000 8:30 0.23 8/8/2000 8:30 45 8/9/2000 8:10 0.82 8/9/2000 8:10 48 8/9/2000 9:15 0.25 8/9/2000 9:15 44.8 8/10/2000 8:30 0.89 8/10/2000 8:30 48.5 8/10/2000 10:10 0.22 8/10/2000 10:10 46.6 8/11/2000 7:35 1.03 8/11/2000 7:35 49.7 8/11/2000 8:00 0.2 8/11/2000 8:00 45 8/12/2000 7:45 0.99 8/12/2000 7:45 48.5 8/12/2000 8:00 0.21 8/12/2000 8:00 45.8 8/13/2000 7:45 1.05 8/13/2000 7:45 46.3 8/13/2000 7:55 0.22 8/13/2000 7:55 45.5 8/14/2000 7:40 0.46 8/14/2000 7:40 41.9 8/14/2000 8:00 0.22 8/14/2000 8:00 48.6 8/15/2000 7:35 0.43 8/15/2000 7:35 45.2 8/15/2000 7:45 0.23 8/15/2000 7:45 46.7 8/16/2000 8:00 0.53 8/16/2000 8:00 50.7 8/15/2000 7:45 0.23 8/15/2000 7:45 46.7 8/17/2000 8:10 230*

8/17/2000 8:10 26.6 8/16/2000 8:10 0.23 8/16/2000 8:10 45.8 8/24/2000 8:20 15.8 8/24/2000 8:20 88.2 8/17/2000 8:00 0.29 8/17/2000 8:00 46.1 8/25/2000 8:20 262*

8/25/2000 8:20 43 8/18/2000 8:05 0.38 8/18/2000 8:05 47.4 8/26/2000 8:30 256*

8/26/2000 8:30 27.8 8/19/2000 8:40 0.3 8/19/2000 8:40 46.5 8/27/2000 12:50 6.9 8/27/2000 12:50 33.6 8/20/2000 9:05 0.22 8/20/2000 9:05 47.7 8/28/2000 8:05 1.77 8/28/2000 8:05 58 8/21/2000 8:10 0.2 8/21/2000 8:10 47.6 8/29/2000 8:00 0.55 8/29/2000 8:00 57 8/22/2000 7:40 1.26 8/22/2000 7:40 48.4 8/30/2000 8:20 0.04 8/30/2000 8:20 53.7 8/23/2000 8:50 0.25 8/23/2000 8:50 44.5 8/31/2000 8:00 0.02 8/31/2000 8:00 55.6 8/24/2000 7:55 0.26 8/24/2000 7:55 45.9 8/25/2000 8:25 0.21 8/25/2000 8:25 47.6 8/26/2000 8:10 0.19 8/26/2000 8:10 48.6 8/27/2000 8:40 0.19 8/27/2000 8:40 48 8/28/2000 8:10 0.21 8/28/2000 8:10 50.2 8/29/2000 8:03 0.2 8/29/2000 8:03 48.5 8/30/2000 8:00 0.18 8/30/2000 8:00 48.3 8/31/2000 8:10 0.19 8/31/2000 8:10 47 1

1 AVERAGE =

0.24 AVERAGE =

47 AVERAGE =

10.06* J AVERAGE =

1 _39

Note that the Unit 2 Reactor Water DO values on 8/17, 8/25, and 8/26 (in bold) are > 200, indicating that hydrogen water chemistry (HWC) was out of service on these days. For this data sample, that is only 3 days out of the 3-month sample period when HWC was not in-service. This supports the assumption that HWC is in-service 90% of the time.

Attachment to PLA-6441 Page 13 of 20 Unit 1 Dissolved Oxygen (DO) Data - 2004 Unit 2 Dissolved Oxygen (DO) Data - 2004 Reactor Water

[Feedwater DReactor Water

]Feedwater Date/Time

[DO, ppb__

Date/Time DO, Ppb [

Date/Time DO, ppb_

Date/Time

]DO, ppb 5/1/2004 8:05 5/2/2004 8:45 5/3/2004 8:00 5/4/2004 7:45 5/5/2004 9:10 5/6/2004 7:45 5/7/2004 8:25 5/8/2004 8:45 5/9/2004 8:45 5/10/2004 8:15 5/11/2004 8:00 5/12/2004 8:40 5/13/2004 8:50 5/14/2004 8:30 5/15/2004 8:20 5/16/2004 8:15 5/17/2004 8:15 5/18/2004 7:50 5/19/2004 7:55 5/20/2004 8:10 5/21/2004 8:10 5/22/2004 7:45 5/23/2004 8:20 5/24/2004 8:25 5/25/2004 7:35 5/26/2004 8:10 5/27/2004 8:15 5/28/2004 8:20 5/29/2004 8:50 5/30/2004 8:05 5/31/2004 9:15 6/1/2004 7:45 6/2/2004 8:05 6/3/2004 7:50 0.16 0.38 0.58 1.12 1.11 1.08 1.13 1.42 1.2 1.15 1.02 1.06 0.99 1

0.8 0.96 1.16 1.31 1.95 1.11 1.12 1.42 1.37 1.43 1.56 1.7 1.89 2.2 2.26 2.02 2.15 1.56 1.77 1.97 5/1/2004 8:05 5/2/2004 8:45 5/3/2004 8:00 5/4/2004 7:45 5/5/2004 9:10 5/6/2004 7:45 5/7/2004 8:25 5/8/2004 8:45 5/9/2004 8:45 5/10/2004 8:15 5/11/2004 8:00 5/12/2004 8:40 5/13/2004 8:50 5/14/2004 8:30 5/15/2004 8:20 5/16/2004 8:15 5/17/2004 8:15 5/18/2004 7:50 5/19/2004 7:55 5/20/2004 8:10 5/21/2004 8:10 5/22/2004 7:45 5/23/2004 8:20 5/24/2004 8:25 5/25/2004 7:35 5/26/2004 8:10 5/27/2004 8:15 5/28/2004 8:20 5/29/2004 8:50 5/30/2004 8:05 5/31/2004 9:15 6/1/2004 7:45 6/2/2004 8:05 6/3/2004 7:50 40 38.7 37.9 39.4 38.5 42.9 38.5 36 38.7 39.6 37 36.6 33.8 38.5 38 38 38 36 39.7 42.2 38.8 37.3 32.2 40.1 39.5 37.5 39.6 34.2 41.5 42 40 38.5 44.8 43 6/1/2004 7:35 6/2/2004 7:50 6/3/2004 8:10 6/4/2004 8:10 6/5/2004 9:40 6/6/2004 9:40 6/7/2004 8:00 6/8/2004 8:00 6/9/2004 8:30 6/10/2004 8:00 6/11/2004 7:55 6/12/2004 9:00 6/13/2004 9:15 6/14/2004 7:50 6/15/2004 8:35 6/16/2004 8:30 6/17/2004 8:20 6/18/2004 8:05 6/19/2004 9:10 6/20/2004 11:55 6/21/2004 8:05 6/22/2004 7:45 6/23/2004 7:45 6/24/2004 7:55 6/25/2004 8:05 6/26/2004 8:40 6/27/2004 9:00 6/28/2004 8:00 6/29/2004 7:40 6/30/2004 8:15 7/1/2004 7:45 7/2/2004 7:55 7/3/2004 11:00 7/4/2004 8:15 0.54 0.56 0.5 0.48 0.53 0.43 0.42 0.46 0.53 0.55 0.51 0.48 0.46 0.37 0.39 0.31 0.36 0.26 0.3 0.36 0.41 0.38 0.34 0.44 0.4 4.12 0.38 0.35 0.32 0.34 0.36 0.36 0.43 0.48 6/1/2004 7:35 6/2/2004 7:50 6/3/2004 8:10 6/4/2004 8:10 6/5/2004 9:40 6/6/2004 9:40 6/7/2004 8:00 6/8/2004 8:00 6/9/2004 8:30 6/10/2004 8:00 6/11/2004 7:55 6/12/2004 9:00 6/13/2004 9:15 6/14/2004 7:50 6/15/2004 8:35 6/16/2004 8:30 6/17/2004 8:20 6/18/2004 8:05 6/19/2004 9:10 6/20/2004 11:55 6/21/2004 8:05 6/22/2004 7:45 6/23/2004 7:45 6/24/2004 7:55 6/25/2004 8:05 6/26/2004 8:40 6/27/2004 9:00 6/28/2004 8:00 6/29/2004 7:40 6/30/2004 8:15 7/1/2004 7:45 7/2/2004 7:55 7/3/2004 11:00 7/4/2004 8:15 37.2 40 39.1 37.5 38.6 41 36.9 38.7 40.6 40.3 42 43.5 39.3 43.8 42.3 41.1 37.8 41.9 42.9 42 43.7 38.1 38.6 42.3 39.9 62.4 44.9 41.2 38.3 38.7 41.3 38.9 40 42.1

Attachment to PLA-6441 Page 14 of 20 Unit I Dissolved Oxygen (DO) Data - 2004 Unit 2 Dissolved Oxygen (DO) Data - 2004 Reactor Water Feedwater Reactor Water

[Feedwater Date/Time JDO, ppb Date/Time DO, ppb Date/Time

[DO, ppb Date/Time DO, ppb 6/4/2004 8:05 6/5/2004 9:30 6/6/2004 9:30 6/7/2004 7:55 6/8/2004 8:00 6/9/2004 8:00 6/10/2004 8:20 6/11/2004 8:15 6/12/2004 8:10 6/13/2004 10:23 6/14/2004 7:45 6/15/2004 8:05 6/16/2004 7:45 6/17/2004 7:45 6/18/2004 7:50 6/19/2004 8:55 6/20/2004 11:40 6/21/2004 8:02 6/22/2004 7:37 6/23/2004 8:36 6/24/2004 8:07 6/25/2004 7:59 6/26/2004 8:30 6/27/2004 8:45 6/28/2004 8:05 6/29/2004 8:15 6/30/2004 7:45 7/1/2004 8:20 7/2/2004 7:50 7/3/2004 10:45 7/4/2004 8:00 7/5/2004 8:25 7/6/2004 7:50 7/7/2004 8:10 2.14 2.32 2.17 2.15 2.45 2.17 1.77 1.81 1.57 0.91 1.33 1.18 1.27 1.4 1.57 1.43 0.59 0.58 0.86 0.86 0.83 0.88 0.85 0.65 0.92 1.02 1.13 0.6 0.5 1.04 0.98 0.84 0.78 0.35 6/4/2004 8:05 6/5/2004 9:30 6/6/2004 9:30 6/7/2004 7:55 6/8/2004 8:00 6/9/2004 8:00 6/10/2004 8:20 6/11/2004 8:15 6/12/2004 8:10 6/13/2004 10:23 6/14/2004 7:45 6/15/2004 8:05 6/16/2004 7:45 6/17/2004 7:45 6/18/2004 7:50 6/19/2004 8:55 6/20/2004 11:40 6/21/2004 8:02 6/22/2004 7:37 6/23/2004 8:36 6/24/2004 8:07 6/25/2004 7:59 6/26/2004 8:30 6/27/2004 8:45 6/28/2004 8:05 6/29/2004 8:15 6/30/2004 7:45 7/1/2004 8:20 7/2/2004 7:50 7/3/2004 10:45 7/4/2004 8:00 7/5/2004 8:25 7/6/2004 7:50 7/7/2004 8:10 36.4 35 40 35.6 37 36 33.8 39 37.4 36.8 36.7 35.2 34.5 36.3 33.9 42.5 41.9 34.7 34.7 42.4 39.6 37.4 35.8 38.5 38.1 40 35.3 41.1 39.4 38 37.7 36.2 37.9 37 7/5/2004 8:30 7/6/2004 7:55 7/7/2004 7:55 7/8/2004 7:45 7/9/2004 8:04 7/10/2004 8:55 7/11/2004 8:27 7/12/2004 8:50 7/13/2004 8:05 7/14/2004 7:45 7/15/2004 8:00 7/16/2004 7:50 7/17/2004 9:05 7/18/2004 9:50 7/19/2004 7:55 7/20/2004 7:25 7/21/2004 7:50 7/22/2004 7:50 7/23/2004 7:45 7/24/2004 10:30 7/25/2004 7:55 7/26/2004 7:45 7/27/2004 8:20 7/28/2004 8:28 7/29/2004 7:50 7/30/2004 8:15 7/30/2004 8:15 7/31/2004 8:35 8/1/2004 10:15 8/2/2004 8:10 8/3/2004 7:50 8/4/2004 8:30 8/5/2004 7:55 8/6/2004 8:15 0.48 0.35 0.3 0.33 0.33 0.37 0.38 0.36 0.38 0.44 0.46 0.46 0.43 0.54 0.5 0.67 0.68 0.65 0.66 0.74 0.71 0.67 0.7 0.75 0.82 0.53 0.53 0.73 0.86 0.78 1

0.95 0.74 0.75 7/5/2004 8:30 7/6/2004 7:55 7/7/2004 7:55 7/8/2004 7:45 7/9/2004 8:04 7/10/2004 8:55 7/11/2004 8:27 7/12/2004 8:50 7/13/2004 8:05 7/14/2004 7:45 7/1 5/2004 8:00 7/16/2004 7:50 7/17/2004 9:05 7/18/2004 9:50 7/19/2004 7:55 7/20/2004 7:25 7/21/2004 7:50 7/22/2004 7:50 7/23/2004 7:45 7/24/2004 10:30 7/25/2004 7:55 7/26/2004 7:45 7/27/2004 8:20 7/28/2004 8:28 7/29/2004 7:50 7/30/2004 8:15 7/30/2004 8:15 7/30/2004 10:20 7/31/2004 8:35 8/1/2004 10:15 8/2/2004 8:10 8/3/2004 7:50 8/4/2004 8:30 8/5/2004 7:55 40.5 38.8 38 39.7 42 40.2 39.6 38.7 37.8 37.9 37.2 34.7 35 33.6 34.5 33.1 32.8 36 36.8 37.3 35.7 35.5 33.7 33.9 31.7 29.8 29.8 30.4 32 30.1 31 42.9 41.7 39.7

Attachment to PLA-6441 Page 15 of 20 Unit 1 Dissolved Oxygen (DO) Data - 2004 Unit 2 Dissolved Oxygen (DO) Data - 2004 Reactor Water Feedwater Reactor Water Feedwater Date/Time DO, ppb Date/Time JDO, ppb Date/Time DO, ppb Date/Time

]DO, ppb 7/8/2004 7:55 0.31 7/8/2004 7:55 38.1 8/7/2004 8:26 0.82 8/6/2004 8:15 39 7/9/2004 8:20 0.31 7/9/2004 8:20 38.9 8/8/2004 8:21 0.84 8/7/2004 8:26 41.5 7/10/2004 8:45 0.23 7/10/2004 8:45 42.9 8/9/2004 8:00 0.78 8/8/2004 8:21 41.2 7/11/2004 8:12 0.37 7/11/2004 8:12 38.9 8/10/2004 7:55 0.68 8/9/2004 8:00 37.5 7/12/2004 8:40 0.31 7/12/2004 8:40 41.9 8/11/2004 10:00 0.71 8/10/2004 7:55 39 7/13/2004 8:00 0.21 7/13/2004 8:00 41.2 8/12/2004 8:10 0.69 8/11/2004 10:00 40 7/14/2004 8:00 0.48 7/14/2004 8:00 37.8 8/13/2004 7:55 0.69 8/12/2004 8:10 43.7 7/15/2004 8:20 0.41 7/15/2004 8:20 34.5 8/14/2004 8:25 0.7 8/13/2004 7:55 37 7/16/2004 8:20 0.27 7/16/2004 8:20 35.9 8/15/2004 7:55 0.69 8/14/2004 8:25 40.3 7/17/2004 9:20 0.25 7/18/2004 9:30 50.3 8/16/2004 8:15 0.71 8/15/2004 7:55 42.6 7/18/2004 9:30 0.33 7/19/2004 7:50 58 8/17/2004 8:35 0.72 8/16/2004 8:15 39.5 7/19/2004 7:50 0.3 7/20/2004 7:50 52.6 8/18/2004 8:05 0.72 8/17/2004 8:35 41 7/20/2004 7:50 0.21 7/21/2004 7:50 45.5 8/19/2004 8:15 0.7 8/18/2004 8:05 37.1 7/21/2004 7:50 0.34 7/22/2004 7:50 38.7 8/20/2004 9:00 0.71 8/19/2004 8:15 40.4 7/22/2004 7:50 1.41 7/23/2004 8:23 43.2 8/21/2004 10:45 0.76 8/20/2004 9:00 41.5 7/23/2004 8:23 1.43 7/24/2004 10:20 43 8/22/2004 9:35 0.82 8/21/2004 10:45 40.3 7/24/2004 10:20 1.33 7/25/2004 7:45 45.4 8/23/2004 8:45 0.82 8/22/2004 9:35 40.4 7/25/2004 7:45 1.21 7/26/2004 7:40 46.7 8/24/2004 7:50 0.84 8/23/2004 8:45 41.6 7/26/2004 7:40 1.14 7/27/2004 7:30 41 8/25/2004 8:05 0.93 8/24/20047 7:50 41 7/27/2004 7:30 0.93 7/28/2004 7:45 42 8/26/2004 7:50 0.82 8/25/2004 8:05 43.8 7/28/2004 7:45 1.12 7/29/2004 9:00 93.4 8/27/2004 8:15 0.74 8/26/2004 7:50

-4l 7/29/2004 9:00 1.09 7/30/2004 8:05 40.8 8/28/2004 9:55 0.73 8/27/2004 8:15 41.6 7/30/2004 8:05 1.47 7/31/2004 9:30 50 8/29/2004 10:45 0.75 8/28/2004 9:55 41.5 7/31/2004 9:30 1.33 8/30/2004 8:15 0.75 8/29/2004 10:45 42.3 8/31/2004 8:15 0.7 8/30/2004 8:15 42.2 I_

1__

8/31/2004 8:15 43.4 AVERAGE=

1 1.13 AVERAGE= [ 40 AVERAGE=

1 0.61 1

AVERAGE=

39

Attachment to PLA-6441 Page 16 of 20 Unit 1 Dissolved Oxygen (DO) Data - 2007

{

Unit 2 Dissolved Oxygen (DO) Data - 2007 Reactor Water

[Feedwater_____[

Reactor Water Feedwater Date/Time DO, ppb__[

Date/Time J__FDO, ppb L Date/Time DO, ppb I Date/Time

]DO, ppb 5/1/2007 8:00 5/2/2007 7:45, 5/3/2007 8:20 5/4/2007 8:15 5/5/2007 8:40 5/6/2007 8:15 5/7/2007 8:05 5/8/2007 8:00 5/9/2007 8:20 5/10/2007 8:25 5/11/2007 8:00 5/12/2007 9:15 5/13/2007 1:20 5/13/2007 9:20 5/14/2007 8:05 5/15/2007 8:05 5/16/2007 8:05 5/17/2007 8:15 5/18/2007 8:40 5/19/2007 9:40 5/20/2007 8:00 5/21/2007 7:45 5/22/2007 8:00 5/23/2007 8:05 5/24/2007 8:30 5/25/2007 5:15 5/26/2007 8:45 5/27/2007 8:55 5/28/2007 8:40 5/29/2007 7:45 5/30/2007 7:40 5/31/2007 8:30 6/1/2007 8:15 6/2/2007 9:10 0.92 0.84 0.88 0.9 0.86 0.88 0.86 0.82 0.78 1.13 1.16 84.7*

1.1 1

1 0.88 0.84 0.82 1.06 0.99 1.12 117.5*

0.93 0.66 0.6 0.62 0.81 0.79 0.73 0.77 0.83 0.75 0.79 0.77 5/1/2007 8:00 5/2/2007 7:45 5/3/2007 8:20 5/4/2007 8:15 5/5/2007 8:40 5/6/2007 8:15 5/7/2007 8:05 5/8/2007 8:00 5/9/2007 8:20 5/10/2007 8:25 5/11/2007 8:00 5/12/2007 9:15 5/13/2007 9:20 5/14/2007 8:05 5/15/2007 8:05 5/16/2007 8:05 5/17/2007 8:15 5/18/2007 8:40 5/19/2007 9:40 5/20/2007 8:00 5/21/2007 7:45 5/22/2007 8:00 5/23/2007 8:05 5/24/2007 8:30 5/25/2007 5:15 5/26/2007 8:45 5/27/2007 8:55 5/28/2007 8:40 5/29/2007 7:45 5/30/2007 7:40 5/31/2007 8:30 6/1/2007 8:15 6/2/2007 9:10 6/3/2007 8:10 41.1 42.2 49.2 45.7 48 48.8 47.2 46.6 44.2 48.1 46.9 56 47.7 43.6 42.7 46.6 42.9 41.3 49.6 43.9 57.7 47.2 48 50.7 49.4 44.2 46 44.3 42.7 46.1 45 44.3 44.7 42.5 5/1/2007 8:10 5/2/2007 8:00 5/3/2007 8:20 5/4/2007 8:10 5/5/2007 8:55 5/6/2007 8:30 5/7/2007 7:50 5/8/2007 7:40 5/9/2007 8:50 5/10/2007 7:55 5/11/2007 7:50

.5/12/2007 10:10 5/13/2007 9:30 5/14/2007 8:20 5/15/2007 8:30 5/16/2007 8:35 5/17/2007 8:30 5/18/2007 7:50 5/19/2007 9:00 5/20/2007 8:20 5/21/2007 8:20 5/22/2007 8:00 5/23/2007 8:30 5/24/2007 8:15 5/25/2007 8:18 5/26/2007 9:00 5/27/2007 9:10 5/28/2007 9:10 5/29/2007 7:45 5/30/2007 8:00 5/31/2007 8:03 6/1/2007 8:10 6/2/2007 9:20 6/3/2007 8:20 0.67 0.73 0.89 1.01 1.14 1.05 1.07 1.07 1.08 1.16 1.03 1.32 0.82 0.86 0.91 0.83 0.88 0.83 0.83 0.73 0.82 0.98 0.79 0.79 0.79 0.87 0.83 0.87 0.86 1

0.88 0.87 0.85 0.81 5/1/2007 8:10 5/2/2007 8:00 5/3/2007 8:20 5/4/2007 8:10 5/5/2007 8:55 5/6/2007 8:30 5/7/2007 7:50 5/8/2007 7:40 5/9/2007 8:50 5/10/2007 7:55 5/11/2007 7:50 5/12/2007 10:10 5/13/2007 9:30 5/14/2007 8:20 5/15/2007 8:30 5/16/2007 8:35 5/17/2007 8:30 5/18/2007 7:50 5/19/2007 9:00 5/20/2007 8:20 5/21/2007 8:20 5/22/2007 8:00 5/23/2007 8:30 5/24/2007 8:15 5/25/2007 8:18 5/26/2007 9:00 5/27/2007 9:10 5/28/2007 9:10 5/29/2007 7:45 5/30/2007 8:00 5/31/2007 8:03 6/1/2007 8:10 6/2/2007 9:20 6/3/2007 8:20 38.1 38.8 36.9 37.6 40.1 37.6 39.6 40 36 38.6 37.8 36.6 35.8 42.8 34.5 34.8 38.2 32.8 36.7 34.7 36.5 36.4 36.9 37.7 36.4 36.6 34 35.3 35.8 35.2 36.8 34.5 34.5 35.5

Attachment to PLA-6441 Page 17 of 20 Unit 1 Dissolved Oxygen (DO) Data - 2007

[

Unit 2 Dissolved Oxygen (DO) Data -2007 Reactor Water Feedwater Reactor Water Feedwater Date/Time DO, ppb Date/Time

]DO, pb Date/Tim

[Dpb Date/Time DO, ppb 6/3/2007 8:10 6/4/2007 8:35 6/5/2007 8:05 6/6/2007 8:10 6/7/2007 8:15 6/8/2007 8:30 6/9/2007 10:40 6/10/2007 10:00 6/11/2007 8:20 6/12/2007 7:55 6/13/2007 8:45 6/14/2007 7:55 6/15/2007 8:30 6/16/2007 8:35 6/17/2007 8:50 6/18/2007 7:50 6/19/2007 8:45 6/20/2007 8:15 6/21/2007 8:35 6/22/2007 8:20 6/23/2007 8:50 6/24/2007 8:40 6/25/2007 8:00 6/26/2007 7:55 6/27/2007 7:55 6/28/2007 7:45 6/29/2007 8:10 6/30/2007 8:40 7/1/2007 8:25 7/2/2007 8:30 7/3/2007 8:45 7/4/2007 8:41 7/5/2007 8:50 7/6/2007 8:30 0.85 0.77 0.83 0.87 0.79 0.74 0.76 0.75 0.86 0.93 1.23 1.13 1.05 75.9*

1.37 0.98 0.89 0.88 0.83 0.89 0.81 0.88 0.83 0.77 0.78 0.75 0.75 0.78 0.93 0.86 0.87 0.83 0.8 0.81 6/4/2007 8:35 6/5/2007 8:05 6/6/2007 8:10 6/7/2007 8:15 6/8/2007 8:30 6/9/2007 10:40 6/10/2007 10:00 6/11/2007 8:20 6/12/2007 7:55 6/13/2007 8:45 6/14/2007 7:55 6/15/2007 8:30 6/16/2007 8:35 6/17/2007 8:50 6/18/2007 7:50 6/19/2007 8:45 6/20/2007 8:15 6/21/2007 8:35 6/22/2007 8:20 6/23/2007 8:50 6/24/2007 8:40 6/25/2007 8:00 6/26/2007 7:55 6/28/2007 7:45 6/29/2007 8:10 6/30/2007 8:40 7/1/2007 8:25 7/2/2007 8:30 7/3/2007 8:45 7/4/2007 8:41 7/5/2007 8:50 7/6/2007 8:30 7/7/2007 8:10 7/8/2007 8:35 45.8 41.6 44.4 47.9 48.4 45 43 42 45 45.2 42.9 47 62.7 47.3 42.9 43.2 44.7 43.2 42.5 44.1 44.9 42.8 44 38.5 36.8 37.2

.36.3 35.6 39.1 38.1 37.8 40 37.1 39.9 6/4/2007 8:20 6/5/2007 8:00 6/6/2007 8:05 6/7/2007 8:00 6/8/2007 8:00 6/9/2007 11:00 6/10/2007 10:15 6/11/2007 8:15 6/12/2007 8:33 6/13/2007 8:40 6/14/2007 7:50 6/15/2007 8:20 6/16/2007 8:45 6/17/2007 9:00 6/18/2007 8:05 6/19/2007 8:30 6/20/2007 8:30 6/21/2007 8:45 6/22/2007 8:45 6/23/2007 9:15 6/24/2007 8:55 6/25/2007 8:35 6/26/2007 8:20 6/27/2007 8:30 6/28/2007 8:30 6/29/2007 8:30 6/30/2007 8:50 7/1/2007 8:35 7/2/2007 8:40 7/3/2007 8:45 7/4/2007 9:00 7/5/2007 8:30 7/6/2007 8:00 7/7/2007 8:25 0.82 0.81 0.8 0.84 0.78 0.75 0.75 0.81 0.79 0.7 0.73 0.65 0.64 0.57 0.57 1.4 1.2 1.4 1.05 0.5 0.72 0.85 0.7 0.4 0.34 0.42 0.51 0.49 0.59 0.66 0.69 0.64 0.68 0.59

'6/4/2007 8:20 6/5/2007 8:00 6/6/2007 8:05 6/7/2007 8:00 6/8/2007 8:00 6/9/2007 11:00 6/10/2007 10:15 6/11/2007 8:15 6/12/2007 8:33 6/13/2007 8:40 6/14/2007 7:50 6/15/2007 8:20 6/16/2007 8:45 6/17/2007 9:00 6/18/2007 8:05 6/19/2007 8:30 6/20/2007 8:30 6/21/2007 8:45 6/22/2007 8:45 6/23/2007 9:15 6/24/2007 8:55 6/25/2007 8:35 6/26/2007 8:20 6/27/2007 8:30 6/28/2007 8:30 6/29/2007 8:30 6/30/2007 8:50 7/1/2007 8:35 7/2/2007 8:40 7/3/2007 8:45 7/4/2007 9:00 7/5/2007 8:30 7/6/2007 13:30 7/7/2007 8:25 35.7 35.7 35.9 35.6 36.4 35 38 36.9 36.8 36.5 36 35.9 37.3 37.6 38.6 40.5 40.6 39.7 38.2 42.4 40.2 38.3 40.2 39.6 44.7 44 42.8 45.5 43.3 44 39 50.3 43.7 46.3

Attachment to PLA-6441 Page 18 of 20 Unit I Dissolved Oxygen (DO) Data - 2007 Unit 2 Dissolved Oxygen (DO) Data - 2007 Reactor Water JFeedwater Reactor Water

[Feedwater Date/Time JDO, ppb I Date/Time IDO, ppb Date/Time

[DO, ppb [

Date/Time DO, ppb 7/7/2007 8:10 7/8/2007 8:35 7/9/2007 10:35 7/10/2007 10:05 7/11/2007 8:50 7/12/2007 7:35 7/13/2007 8:00 7/14/2007 9:40 7/15/2007 9:10 7/16/2007 7:50 7/17/2007 8:00 7/18/2007 7:35 7/19/2007 7:59 7/20/2007 7:52 7/21/2007 8:30 7/22/2007 8:20 7/23/2007 8:30 7/24/2007 8:00 7/25/2007 7:50 7/26/2007 7:55 7/27/2007 8:15 7/28/2007 9:15 7/29/2007 9:25 7/30/2007 8:30 7/31/2007 9:00 8/1/2007 8:20 8/2/2007 8:40 8/3/2007 8:45 8/4/2007 9:05 8/5/2007 8:45 8/6/2007 8:35 8/7/2007 3:25 8/7/2007 8:20 8/8/2007 8:40 0.8 0.87 0.77 0.73 0.78 0.84 0.84 0.89 1.31 1.24 1.31 1.19 1.16 1.28 1.2 1.2 1.14 1.12 1.17 1.04 0.71 0.74 0.8 0.83 0.82 0.79 0.76 0.76 0.75 0.79 0.76 0.8 0.79 0.87 7/9/2007 10:35 7/10/2007 10:05 7/11/2007 8:50 7/12/2007 7:35 7/13/2007 8:00 7/14/2007 9:40 7/15/2007 9:10 7/16/2007 7:50 7/17/2007 8:00 7/18/2007 7:35 7/19/2007 7:59 7/20/2007 7:52 7/21/2007 8:30 7/22/2007 8:20 7/23/2007 8:30 7/24/2007 8:00 7/31/2007 9:00 8/1/2007 8:20 8/2/2007 8:40 8/3/2007 8:45 8/4/2007 9:05 8/5/2007 8:45 8/6/2007 8:35 8/7/2007 8:20 8/8/2007 8:40 8/9/2007 8:10 8/10/2007 7:45 8/11/2007 10:10 8/12/2007 7:50 8/13/2007 8:20 8/14/2007 8:20 8/15/2007 7:40 8/16/2007 8:05 8/17/2007 8:35 36.8 35.4 39 34.9 39.7 35.8 34.6 36.3 38.9 35.1 39.4 36.2 38.9 35.3 35.5 38.8 38.4 35.7 35.5 39.8 37.9 38.9 40.1 36.1 37.1 38.7 35.4 35.2 38.4 35.6 36.9 36.9 38.8 34.7 7/8/2007 8:50 7/9/2007 8:20 7/10/2007 8:05 7/11/2007 8:20 7/12/2007 8:20 7/13/2007 8:30 7/14/2007 9:55 7/15/2007 9:45 7/16/2007 8:30 7/17/2007 8:30 7/18/2007 8:05 7/19/2007 8:20 7/20/2007 7:50 7/21/2007 8:45 7/22/2007 8:35 7/23/2007 8:30 7/24/2007 8:05 7/25/2007 8:15 7/26/2007 8:15 7/27/2007 7:35 7/28/2007 9:25 7/29/2007 9:35 7/30/2007 8:15 7/31/2007 8:00 8/1/2007 8:30 8/2/2007 8:25 8/3/2007 7:45 8/4/2007 9:15 8/5/2007 8:55 8/6/2007 8:30 8/7/2007 8:25 8/8/2007 10:30 8/9/2007 8:15 8/10/2007 8:15 0.82 0.95 0.77 0.79 0.72 0.66 0.64 0.67 0.72 0.73 0.74 0.67 0.73 0.66 0.69 0.7 1.3 1.26 1.39 1.32 1.24 1.26 1.54 1.53 1.47 1-.48 1.5 1.43 1.43 1.35 1.27 1.09 1.14 1.13 7/8/2007 8:50 7/9/2007 8:20 7/10/2007 8:05 7/11/2007 8:20 7/12/2007 8:20 7/13/2007 8:30 7/14/2007 9:55 7/15/2007 9:45 7/16/2007 8:30 7/17/2007 8:30 7/18/2007 8:05 7/19/2007 8:20 7/20/2007 7:50 7/21/2007 8:45 7/22/2007 8:35 7/23/2007 8:30 7/24/2007 8:05 7/25/2007 8:115 7/26/2007 8: 15 7/27/2007 7:35 7/28/2007 9:25 7/29/2007 9:35 7/30/2007 8:15 7/31/2007 8:00 8/1/2007 8:30 8/2/2007 8:25 8/3/2007 7:45 8/4/2007 9:15 8/5/2007 8:55 8/6/2007 8:30 8/7/2007 8:25 8/8/2007 10:30 8/9/2007 8:15 8/10/2007 8:15 44 46 42.9 46.8 44.2 45.5 45.6 41.9 43.2 44.4 45.4 44.5 47.2 43.8 42.6 43 44 45 42 33 31.8 32.7 32.3 34.2 34.3 33.1 32.8 37.2 33.3 33.5 35 35.2 32.4 32.9

Attachment to PLA-6441 Page 19 of 20 Unit 1 Dissolved Oxygen (DO) Data -2007 Unit 2 Dissolved Oxygen (DO) Data - 2007 Reactor Water

[Feedwater Reactor Water Feedwater Date/Time DO, ppb Date/Time

]DO, ppb I Date[Time IDO, ppb Date/Time

]DO, ppb 8/9/2007 8:10 8/10/2007 7:45 8/11/2007 10:10 8/12/2007 7:50 8/13/2007 8:20 8/14/2007 8:20 8/15/2007 7:40 8/16/2007 8:05 8/17/2007 8:35 8/18/2007 9:05 8/19/2007 8:35 8/20/2007 8:35 8/21/2007 8:20 8/22/2007 8:15 8/23/2007 8:30 8/24/2007 8:28 8/25/2007 9:00 8/26/2007 8:35 8/27/2007 8:23 8/28/2007 8:05 8/29/2007 8:35 8/30/2007 8:20 8/31/2007 8:45 9/1/2007 8:25 9/2/2007 8:40 9/3/2007 8:00 9/4/2007 8:05 9/5/2007 7:35 9/6/2007 7:50 9/7/2007 7:45 9/8/2007 9:30 9/9/2007 8:05 9/10/2007 8:40 9/11/2007 8:15 0.93 0.85 0.84 0.99 0.84 0.82 0.78 0.75 0.7 0.7 0.73 0.7 0.74 0.71 0.72 0.93 0.87 0.92 0.94 0.94 0.97 0.81 0.76 0.8 0.9 0.93 0.85 0.9 0.89 0.91 0.93 1.03 0.97 0.95 8/18/2007 9:05 8/19/2007 8:35 8/20/2007 8:35 8/21/2007 8:20 8/22/2007 8:15 8/23/2007 8:30 8/24/2007 8:28 8/25/2007 9:00 8/26/2007 8:35 8/27/2007 8:23 8/28/2007 8:05 8/29/2007 8:35 8/30/2007 8:20 8/31/2007 8:45 9/1/2007 8:25 9/2/2007 8:40 9/3/2007 8:00 9/4/2007 8:05 9/5/2007 7:35 9/6/2007 7:50 9/7/2007 7:45 9/8/2007 9:30 9/9/2007 8:05 9/10/2007 8:40 9/11/2007 8:15 9/12/2007 8:45 9/13/2007 8:45 9/14/2007 8:15 9/15/2007 9:00 9/16/2007 8:45 9/17/2007 8:45 9/18/2007 8:00 9/19/2007 8:00 9/20/2007 8:45 39.1 36 37.2 39.2 38.6 38.7 38.2 37.4 37 35.3 35.4 36.5 38.2 37.5 39 38 36.5 38.8 37 37.3 37 38.3 37.6 44 34.5 36 39.5 40 36.3 38 37.8 36.5 39 35.4 8/11/2007 5:10 8/12/2007 7:55 8/13/2007 8:20 8/14/2007 8:25 8/15/2007 8:30 8/16/2007 8:20 8/17/2007 8:05 8/18/2007 9:15 8/19/2007 8:45 8/20/2007 8:20 8/21/2007 8:25 8/22/2007 8:20 8/23/2007 8:35 8/24/2007 8:05 8/25/2007 9:15 8/26/2007 8:15 8/27/2007 8:35 8/28/2007 8:15 8/29/2007 8:25 8/30/2007 8:40 8/31/2007 8:20 9/1/2007 8:35 9/2/2007 8:50 9/3/2007 8:40 9/4/2007 8:05 9/5/2007 8:15 9/6/2007 7:45 9/7/2007 8:10 9/8/2007 8:30 9/9/2007 8:35 9/10/2007 8:45 9/11/2007 8:05 9/12/2007 9:10 9/13/2007 8:25 1.19 1.04 1.05 1.03 1.11 1.13 0.99 1.08 1.08 1.16 1.09 1.04 1

1.11 0.95 0.86 0.68 0.33 0.93 1.17 1.17 1.31 1.21 1.4 1.31 1.52 1.5 1.56 1.43 1.51 1.52 1.34 1.31 1.8 8/11/2007 5:10 8/12/2007 7:55 8/13/2007 8:20 8/14/2007 8:25 8/15/2007 8:30 8/16/2007 8:20 8/17/2007 8:05 8/18/2007 9:15 8/19/2007 8:45 8/20/2007 8:20 8/21/2007 8:25 8/22/2007 8:20 8/23/2007 8:35 8/24/2007 8:05 8/25/2007 9:15 8/26/2007 8:15 8/29/2007 8:25 8/30/2007 8:40 8/31/2007 8:20 9/1/2007 8:35 9/2/2007 8:50 9/3/2007 8:40 9/4/2007 8:05 9/5/2007 8:15 9/6/2007 7:45 9/7/2007 8:10 9/8/2007 8:30 9/9/2007 8:35 9/10/2007 8:45 9/11/2007 8:05 9/12/2007 9:10 9/13/2007 8:25 9/14/2007 8:10 9/15/2007 9:15 33.2 32 34.7 33.2 36.5 33 35.7 32.9

35

- 31 33.2 32.9 38.6 42 36.9 30 42.7 41.6 39.8 40 43.4 41 40.6 41.1 40.1 37.4 38.2 38.9 39.6 39.6 38.9 40.4 41 39.2

Attachment to PLA-6441 Page 20 of 20 Unit I Dissolved Oxygen (DO) Data - 2007 Unit 2 Dissolved Oxygen (DO) Data - 2007 Reactor Water Feedwater Reactor Water Feedwater Date/Time DO, ppb Date/Time DO, ppb Date/Time DO, ppb Date/Time DO, ppb 9/12/2007 8:45 0.96 9/21/2007 8:45 36.5 9/14/2007 8:10 1.65 9/16/2007 8:30 40.5 9/13/2007 8:45 7.9 9/22/2007 9:20 37.1 9/15/2007 9:15 1.6 9/17/2007 8:15 41.9 9/13/2007 13:15 1.3 9/23/2007 9:05 36.3 9/16/2007 8:30 1.34 9/18/2007 7:40 40.9 9/14/2007 8:15 0.82 9/24/2007 8:15 40.2 9/17/2007 8:15 1.26 9/19/2007 8:00 39.9 9/15/2007 9:00 0.83 9/25/2007 8:15 36.3 9/18/2007 7:40 1.47 9/20/2007 9:03 39.3 9/16/2007 8:45 0.88 9/26/2007 8:20 39.1 9/19/2007 8:00 1.39 9/21/2007 8:45 39.1 9/17/2007 8:45 0.79 9/27/2007 8:10 38.3 9/20/2007 9:03 1.2 9/22/2007 9:05 37.6 9/18/2007 8:00 0.93 9/28/2007 8:00 36.2 9/21/2007 8:45 1.3 9/23/2007 8:50 40.4 9/19/2007 8:00 1

9/29/2007 8:30 46.2 9/22/2007 9:05 1.33 9/24/2007 7:55

-37.8 9/20/2007 8:45 1

9/30/2007 8:30 46.8 9/23/2007 8:50 1.34 9/25/2007 8:25

-.38 9/21/2007 8:45 1.02 9/24/2007 7:55 1.35 9/26/2007 7:55 38.8 9/22/2007 9:20 1.17 9/25/2007 8:25 1.24 9/27/2007 7:50 38 9/23/2007 9:05 1.2 9/26/2007 7:55 1.26 9/28/2007 7:45 37.2 9/24/2007 8:15 1.12 9/27/2007 7:50 1.08 9/29/2007 8:45 40.3 9/25/2007 8:15 1.24 9/28/2007 7:45 1.31 9/30/2007 8:40 38.9 9/26/2007 8:20 1.23 9/29/2007 8:45 1.1 9/27/2007 8:10 1.42 9/30/2007 8:40 1.07 9/28/2007 8:00 1.42 9/29/2007 8:30 1.23 9/30/2007 8:30 1.34 AVERAGE =

2.72*

AVERAGE =

41 AVERAGE=

1.00 AVERAGE=

38

Note that the Unit 1 Reactor Water DO values on 5/12, 5/21, and 6/16 (in bold) are >50, indicating that hydrogen water chemistry (HWC) may have been out of service on these days. For this data sample, that is only 3 days out of the 5-month sample period when HWC was not in-service. This supports the assumption that HWC is in-service 90% of the time.

v t e Letter Sequence Request
TAC:MD3019, (Approved, Closed)
Initiation Request Acceptance... Administration Questions 3 November 2008 7 May 2009 25 July 2007 30 July 2007 13 June 2008 3 December 2008 27 April 2009 Answers 27 August 2008 Results Approval Other: ML082950351
MONTHYEAR2008-06-13 [Table View]

PLA-6441, Request for Additional Information for the Review of License Renewal Application (LRA) Section 4.3

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PLA-6441, Request for Additional Information for the Review of License Renewal Application (LRA) Section 4.3

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