RS-12-084, Request for a License Amendment, Technical Specification 3.7.3, Ultimate Heat Sink.

Request for a License Amendment, Technical Specification 3.7.3, Ultimate Heat Sink.

ML12200A330
Person / Time
Site:	LaSalle
Issue date:	07/12/2012
From:	Gullott D Exelon Generation Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RS-12-084
Download: ML12200A330 (56)

Text

1 RS-12-084 10 10 CFR 50.90 July 12, 2012 U. S. Nuclear Nuclear Regulatory Regulatory Commission Commission Attn: Document Control Desk Washington, DC DC 20555-0001 20555-0001 LaSalle County Station, Units 11 and 2 LaSalle Facility Operating License License Nos.

Nos.NPF-1 NPF-11 1 and and NPF-1 NPF-18 8 NRC Docket Nos. 50-373 and 50-374 50-374

Subject:

Request for a License Amendment to LaSalle County Station, Units 11 and 2, 2, Technical Specification 3.7.3, 3.7.3, "Ultimate Heat Sink" In accordance with with 10 CFR CFR 50.90, 50.90,"Application "Application for for amendment amendmentof oflicense licenseor orconstruction construction permit," Exelon permit," Exelon Generation Generation Company, Company, LLC (EGC) (EGC) is is requesting requesting aa changechange to to the the Technical Technical Specifications (TS) (TS) of Facility Operating License Nos. Nos. NPF-11 NPF-11 and NPF-18 for LaSalle County County (LSCS), Units 1 and 2. Currently, Station (LSCS), Currently, Surveillance SurveillanceRequirement Requirement(SR) (SR) 3.7.3.1 3.7.3.1 verifies verifiesthe the cooling water cooling water temperature suppliedsupplied to to the the plant plant from from the the Ultimate Heat Sink Sink (UHS)

(UHS)isis s; 101.25oF.

<_101.25 OF.IfIfthetheUHS UHSindicated indicatedtemperature temperature exceeds 101.25 101.25 OF, of, TSTS 3.7.3 Required Actions Actions B.1B.1 and B.2 would be entered concurrently, B.2 would be entered concurrently, requiring requiring both LSCS LSCS units units to to be be placed placed in in Mode 3 within 12 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and Mode Mode 44 within within 36 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

hours.

Recent summer summer meteorological meteorological conditions conditions havehave resulted resulted in the TS UHS temperaturetemperature limit limit being being challenged. These conditionsconditions include include elevated elevated air temperatures, high humidity, and low low wind speed. Meteorological Meteorologicalconditions conditions in in the the future future may may continue continue challenging challenging the currentcurrent TS limit of s; 101.25

<_ of.

101.25 OF.

As described in Regulatory Guide 1.27, "Ultimate in Regulatory "Ultimate Heat Heat Sink Sink for for Nuclear Nuclear Power Power Plants,"

Plants,"

Revision 1, the predicted predicted response of the UHS UHS temperature temperatureto tothe thedesign designbasis basisevent eventisisaa function function of the historical weather including historical weather including thethe diurnal diurnal variations variations in in air air temperature.

temperature. This Thislicense license amendment amendment is is being being sought sought toto allow allow the TS temperature temperature limit limit of the cooling cooling water water supplied supplied to to the plant from the UHS to vary with the diurnal cycle. The TS limit will be graphical The TS limit will be graphical with the with the UHS temperature limit varying varying as a function function of time of day. day. TheThepurpose purposeof ofthe theUHSUHSTS TS temperature limit is to limit is to restrict restrictthe the initial initialUHS UHS temperature temperature such such that that the the maximum maximum UHS UHS temperature experienced during during thethe UHS design design basis event (i.e., the the temperature temperature of of the the cooling supplied to cooling water supplied to the the plant plant safety safety systems systems fromfrom the the UHS)

UHS) would not exceed the the design design limit of 107 of. The proposed TS temperature limit 107 OF. limit will will therefore therefore vary vary with with the the diurnal diurnalcyclecycleto to limit the maximum temperature of limit the of the UHS UHSsupplied suppliedto toplant plantsafety safetysystems systems to to <_ 107OoF.

s; 107 F. IfIf the the temperature of of the cooling cooling water supplied supplied to to the plant plant from from the the UHS exceeds exceeds the the TSTSlimit, limit, Required Actions Actions B.1 B.1 and B.2B.2 would would be be entered entered concurrently, concurrently, requiring requiring both LSCS LSCS units units toto bebe placed in Mode 33 within within 12 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> hours and and Mode Mode 44within within 3636hours.

hours.

July 12, July 12, 2012 2012 U. S.

U. S. Nuclear Regulatory Commission Commission Page 22 Page The attached The attached amendment amendment request is subdivided as follows:

Attachment 1 provides an evaluation of the proposed change.

Attachment change.

Attachment 2 provides the current TS pages with the proposed Attachment proposed changes changes indicated indicated with with markups.

markups.

Attachment 3 provides the current TS Bases pages Attachment pages with the proposed proposed changes changes indicated indicated with markups.

with markups. TheThe TS TS Bases Bases pages pages are are provided provided for for information information only only and and do do not not require require NRC NRC approval.

Attachment 4 provides a revised copy of of the TS TS pages pages with with the the proposed proposed changes changes incorporated.

Attachment 5 provides a discussion of of LaSalle LaSalle County County Station Station Core Core Standby Standby Cooling Cooling System-Equipment Cooling WaterWater System System (CSCS-ECWS)

(CSCS-ECWS)cooling coolingcapabilities capabilitiesatat107107OFof Attachment 6 provides the worst worst 24-hour 24-hour andand 30-day 30-day weather weather data data resulting resulting in in the the maximum maximum plant intake temperature that was used in LaSalle County County Station Station Analysis L-002457, L-002457, "LaSalle County Station Ultimate Heat Sink Analysis," RevisionRevision 77 EGC requests approval of the proposed change change by by July July 12, 12, 2013, 2013, with with the the amendment amendment being being implemented within 30 days of of issuance.

The proposed amendment has has been been reviewed reviewed by by the the LSCS LSCS Plant Plant Operations Operations Review Review Committee and approved by by the Nuclear Nuclear Safety Safety Review Review Board Board in in accordance accordance withwith the the requirements of of the EGC EGC Quality Quality Assurance AssuranceProgram.

Program.

July 12, July 12, 2012 2012 U. S. Nuclear U. Nuclear Regulatory Regulatory Commission Commission Page 3 Page EGC is notifying EGC notifyingthethe State State of Illinois this application Illinois of this application for for a change to to the TS by sending sending a copy of this of this letter letter and and its its attachments attachments to to the designated State State Official Official in in accordance accordancewithwith 10 CFR 10 CFR 50.91, "Notice "Notice for for public publiccomment; comment; State State consultation,"

consultation," paragraph paragraph (b).

There are no no new new regulatory regulatory commitments commitments contained in in this letter. Should Should youyou have any questions concerning questions concerningthisthisletter, letter,please please contact contact Mitch Mitch Mathews Mathews at at (630) 657-2819.

657-2819.

I declare under penalty of perjuryperjury that the foregoing foregoing is is true true and and correct. Executed on correct. Executed on the the 12th day 12th day of of July 2012.

Respectfully, David M.

David M. Gullott Manager, Licensing : Evaluation of Proposed 1: Evaluation Proposed Change : Mark-up Mark-up of Proposed Proposed Technical Technical Specifications Specifications Page Page Change Change : 3: Markup of Proposed Proposed Technical Technical Specifications SpecificationsBases BasesPage Page Changes Changes -- For For Information Only : 4: Revised Technical Specifications Specifications Pages Pages : 5: A Discussion Discussion theof the LaSalle County Station Station Core Standby Cooling System-Cooling Water System (CSCS-ECWS) Heat Transfer Capabilities Equipment Cooling Capabilities at at 107 107 OFOF Attachment : 6: Worst 24-24-Hour Hour and 30-Day WeatherWeather Data DataResulting Resulting inin the the Maximum Maximum Plant Plant Intake Temperature Used Used in in LaSalle LaSalle County County Station Station Analysis Analysis L-002457, "LaSalle County Station Ultimate Heat Heat Sink Sink Analysis,"

Analysis," Revision Revision 77 cc:

cc: Illinois Emergency Management Illinois Emergency Management Agency - Division Division ofof Nuclear Nuclear Safety Safety

ATTACHMENT 1I ATTACHMENT Evaluation of Evaluation of Proposed Proposed Change

Subject:

Request for Request for aa License License Amendment Amendment to to Technical Specification 3.7.3, "Ultimate "Ultimate Heat Sink" Heat 1.0

1.0 DESCRIPTION

DESCRIPTION

2.0 PROPOSED CHANGE

S

5.0 REGULATORY ANALYSIS

5.1 No Significant Hazards Consideration Significant Hazards Consideration 5.2 Applicable Regulatory Requirements /Criteria Requirements/Criteria 6.0 ENVIRONMENTAL EVALUATION

7.0 REFERENCES

Page Page 11of of21 21

ATTACHMENT1I ATTACHMENT Evaluationof Evaluation of Proposed Proposed Change Change 1.0

1.0 DESCRIPTION

DESCRIPTION InInaccordance accordancewith with 10 10 CFRCFR 50.90, 50.90, "Application "Application for for amendment of license or construction permit," Exelon Generation permit," Exelon Generation Company, LLC (EGC) Company, LLC (EGC) is requesting a change to the Technical Specifications (TS)

Specifications (TS) ofof Facility Operating License License Nos. Nos. NPF-1 NPF-111 and NPF-18 for LaSalle County County Station (LSCS),

Station (LSCS), Units Units 11 andand 2. 2. Currently, Surveillance Requiremen Requirementt (SR) 3.7.3.1 3.7.3.1 verifies verifies the the cooling water cooling water temperature temperature supplied supplied to to the the plant from from the Ultimate Heat Sink (UHS) is

<<101.25 101.25oF. OF.IfIfthetheUHSUHSindicated indicatedtemperature temperature exceeds 101.25 101.25 OF, of, TSTS 3.7.3 Required Required Actions Actions B.1 andB.1 and B.2 would be entered concurrently concurrently,, requiring both LSCS LSCS unitsunits to be be placed placed in in Mode 33 within Mode within 12 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> hours and and Mode 4 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

Recent summer Recent summer meteorological meteorological conditions have resulted in the TS UHS temperature limit being challenged. These challenged. These conditions conditions includeincludeelevated elevatedair airtemperature temperatures, highhumidity, s, high humidity,and andlow lowwind wind speed. The speed. The current current TS TS temperature temperature limit limit does does not not reflect reflect the diurnal effect that weather conditions have conditions have uponupon the the allowable allowable UHS UHS temperature.

temperature. Since Since the the UHSUHS heats heats up up during the day and cools and cools off during during the night, the allowable UHS temperature is is dependent dependent upon upon the the time time of of day when day when the the design design basisbasis event event occurs.

occurs. Should Should the the postulated postulated event event occur occur during the day, the allowable UHS temperature would be different allowable different (i.e.,

(Le., lower) lower) than ifif the the postulated postulated event event occurs occurs atat night.

night.

The physical The physical configuratio configuration n of the UHS pond pond influences influences its its capability capability to to transfer transfer heatheat to to the the environment. The environment. The UHSUHS design design analysis analysis has has been been improved improved to to account account for for the the surface surface area and and volume volume of the UHS pond that are not effective. The Theeffective effectivesurface surfacearea areaand andvolume volumewere were determined determined using computation computational al fluid dynamics (CFD) (CFD) which determined the the UHS UHS flowflow pattern pattern during during the the design basis event. The Therecirculation recirculationareas areasofofthetheUHS UHSare areidentified identifiedand andthe theUHSUHS volume volume actively involved involved in in the the main main waterwater flow flow is is determined determined along along with with the the associated associated surface surface area.

area.

Previous Previous revisions revisions of of the the design design analysis analysisutilized utilizedhistorical historicalweather weatherdata datafrom from1948 1948toto1996. 1996.

This analysis has been updated to This analysis has been updated to include weather data include weather data through through September September30, 30, 2010, 2010, whichwhich includes includes the the period period where the the maximum maximum indicated indicated coolingcooling water water supplied supplied to to plant plant from from the the cooling cooling lake lake was observed.

observed. The TheUHS UHStemperature temperaturedesign designanalysis analysismethodolog methodology y isisbased basedon on Regulatory Regulatory Guide Guide 1.27,1.27, Revision Revision 1,1,"Ultimate "UltimateHeat Heatsink sinkforforNuclear NuclearPower PowerPlants,"

Plants,"and and NUREG-069 NUREG-0693, 3, "Analysis "Analysis of ofUltimate UltimateHeat HeatSink SinkCooling CoolingPonds,"Ponds,"dated datedNovember November1980. 1980.

This This license license amendment amendment is is being being sought sought to to allow allowthe the TSTS temperature temperature limit limitof ofthe the cooling cooling waterwater supplied to the plant from the supplied to the plant from the UHS to vary with UHS to vary with thethe diurnal diurnal cycle cycle andand to to reflect reflect thethe effect effectof ofmore more severe severe weather.

weather. Regulatory RegulatoryPosition PositionC.1.b C.1.bofofRG RG1.27,1.27,Revision Revision1 1statesstatesthat thatthetheUHS UHS temperature temperature transient transient analysis analysis should should include includediurnaldiurnal variations variationsduring during the the 1-day 1-dayand and 30-day 30-day evaluation evaluation periods.periods. The Thepurpose purposeofofthe theUHS UHStemperature temperaturelimit limitisistotoensure ensurethe theinitial initial temperature temperature of ofthe the UHS UHS during during the thedesign designbasis basiseventeventwillwillnotnotresult resultininthe theUHSUHSexceeding exceedingthe the design design limitlimit for for the the cooling cooling waterwater supplied supplied to to the theplant plantsafety safety systems systemsduring duringthe the30 30daydayworstworst weather weatherperiod.period. The TheUHS UHStemperature temperaturelimit limitvaries varieswith withthethediurnal diurnalcyclecyclesuchsuchthat thatthe themostmost restrictive temperature occurring restrictive temperature occurring inthe in themorning morninghours hoursensures ensuresthat thatthe themaximum maximumtemperature temperature ofofthethe cooling cooling waterwatersupplied supplied to to the theplant plantremains remainsbelow belowthe the107107°F ofdesign designlimit limitregardless regardlessofof when the when thepostulated postulated event eventoccurs.

occurs. The Thecurrent currentLaSalle LaSalleTS TSuses usesthe themost mostrestrictive restrictive temperature temperatureas asthethe limit limitindependen independent t ofofthe thetime timeofofday.day. ThisThisresults resultsininan anexcessive excessivereduction reduction inin available availablemargin margin during during recent recent meteorologi meteorological cal conditions.

conditions. This Thisproposed proposedlicense licenseamendment amendment Page Page22ofof21 21

ATTACHMENT 1I ATTACHMENT Evaluation of Evaluation of Proposed Proposed Change Change will implement will implement aa UHS UHS temperature temperature versus versus timetime ofof day day graph graph to to limit limitthe the allowable allowable UHSUHS temperature. The temperature. The TS TS graph is is conservatively conservativelybased based on onthe the UHS UHS temperature response assuming the assuming the UHS UHS sedimentation sedimentation level level atat the the TS TS limit limit of of 18 18 inches.

IfIf the the UHS UHS indicated indicated temperature temperature exceeds exceeds the the allowable UHS temperature at a given time, Required Required Actions Actions B.1B.1 and and B.2 B.2 would would be be entered entered concurrently, concurrently, and both LSCS units units would be be placed in placed in Mode Mode 33 within within 1212 hours0.014 days <br />0.337 hours <br />0.002 weeks <br />4.61166e-4 months <br /> hours and and inin Mode 4 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

The proposed license The license amendment amendment will will ensure the maximum temperature temperature of of the the cooling cooling water water supplied to the plant during supplied to the plant during the UHS the UHS design basis event remains s5 107 OF, of, LaSalle's LaSalle's current safety-related cooling safety-related cooling waterwater design temperature.

temperature. Therefore, there is no impact of this this change on LaSalle safety on safety analyses analyses including including thethe long long term term suppression suppression pool pool temperature.

temperature.

2.0 PROPOSED CHANGE

S The proposed changes to TS 3.7.3 are shown in in Figures 1, 1, 2, 2, and and 3 below:

Required Required ActicAction and -lL 1 Be HI MODE 3. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> associated associated CCompletion "tZ Time of not met.

not of Condition

!I1et.

Condition AA A!ill~

Be in MODE 4. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> cscs pond inoperable for reasons other than Condition A.

I B.

B. Cooling water Cooling water B.l Perform SR Perform 3.7.3.1.

SR 3.7.3.2_ Once per Once per hour hOur L-J I temperature supplied temperature to the to the pant supplied p'ant from from thethe pond >~ 1o1°F_

CSCS pond CSCS 101°F.

I Figure Figure 1:1: New New TS TS 3.7.3 3.7.3 Condition Condition Requiring Requiring Hourly Hourly Cooling Cooling Water Water Temperature Temperature Monitoring Monitoring When Cooling Water Temperature is 101°F orHigher When Cooling Water Temperature is 101 OF or Higher Page 33of Page of21 21

ATTACHMENT 1I ATTACHMENT Evaluation of Evaluation of Proposed Proposed Change Change UHS UHS 3.7.3 3-7.3 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY FREQUENCY SR 3.7.3-1 Verify Veri y cc coolingg water water temperature supplied supplied In In accordance accordance to thee DI ant from from the the CSCS pond is is with the with the Surveillance Surveillance Frequency Frequency

.7 Control Control Program Program Figure 2: New Acceptance Criterion for SR Figure SR 3.7.3.1 3.7.3.1 105. 00 105.00 ..,.-----,-----.,.---~,---------_r___--__r------___,

104.50 +-_ _........4._

Unacceptable Unacceptable Operation (104.00) : (104.00)

(104.00) ;. (104.00)

(104.00) . (104.00) 104.00 + - - - - - i - -

104.00 (103.78)

~ 103.50 +-\-----+-----------f--+.----;........--~-------

QJ E 103. 00 +----\--------~------.-+- ..-.--.------.----..--.

QJ C.

E Acceptable Acceptable

~ 102.50 +----\---,------...........;{-----i----'--

Operation Operation 102.00 102.00 +----Jt:-------+--

101.50 101. 50 +.-----~---'_+_---'-----,__------------___1 101.00 101. Of) -'-1---...,------------,---------....-----,------1 ^_

00:00 00:00 03:00 03:00 06:00 06:00 09:00 09:00 12:00 12:00 15:00 15:00 18:00 18:00 21 :00 21:00 24:00 24:00 Time of Time of Day Day Figure 3.7.3-1 Figure 3.7.3-1 (page(page 11 of of 1)1)

Temperature of Temperature of Cooling Cooling Water Water Supplied Supplied to to the the Plant Plant fromfrom thethe CSCS Pond CSCS Pond Versus Versus TimeTime of of Day Day Requirements Requirements Figure Figure 3: 3: New New TSTS Figure Figure 3.7.3-1 3.7.3-1 Defining Defining Acceptance AcceptanceCriteria Criteriafor forSRSR3.7.3.1 3.7.3.1 3.0

3.0 BACKGROUND

BACKGROUND The The UHS UHS provides provides aa heat heatsink sink for for process process andand operating operating heat heatfrom from safety safety related related components components during during the the UHSUHS design design basis basis event.

event. TheTheResidual ResidualHeat HeatRemoval RemovalService ServiceWater Water(RHRSW)

(RHRSW)

Page Page 44 ofof2121

ATTACHMENT 1I ATTACHMENT Evaluation of Evaluation of Proposed Proposed ChangeChange system and system and Diesel Diesel Generator Generator Cooling Cooling Water Water (DGCW)

(DGCW) system are the principal systems at LSCS LSCS that utilize that utilize the the UHS UHS to to reject heat from from safety related plant loads.

The UHS The UHS consists consists of of an an excavated excavated pond pond integral integral with with the the cooling cooling lake.

lake. The volume of the pond is sized is sized toto permit permit thethe safe safe shutdown shutdown and and cooldown cooldown of both LSCS units for a 30-day period period design basis design basis event event withwith nono additional additional makeup makeupwater water source.

source. The UHS design basis event includes aa failure includes failure ofof the the LSCS LSCS cooling cooling lake dike resulting resulting in the UHS as the remaining source of of cooling water cooling water to to plant plant safety safety systems.

systems. The design basis event for the LSCS UHS is a loss of offsite power (LOOP) offsite (LOOP) on on both both units resulting resulting in all all emergency diesel generators running, while one unit one unit experiences experiences an an accident (Le., (i.e., a design basis accident (DBA) loss of of coolant accident accident (LOCA)) while (LOCA>> while the the other other unit unit isis shutdown shutdown normally.

normally. The function function of the UHS is to provide cooling of the cooling the RHR RHR heat exchangers, diesel generator coolers, Emergency Core Core Cooing Cooing System System (ECCS) cubicle (ECCS) cubicle area area cooling cooling coils, coils, RHR pump seal coolers, coolers, and Low Pressure Core Spray Spray (LPCS) pump (LPCS) pump motormotor cooling cooling coils.

coils. The UHS provides indirect heat rejection for the containment through the RHR through RHR heatheat exchangers.

exchangers. The The current current maximum maximum safety-related safety-related cooling water design temperature at LSCS has been evaluated to be 107 be 107 of.OF. Attachment 5 discusses the impact impact of of 107 ofOFUHSUHScooling coolingwaterwateron onthethedesign design functions functions of of Core Core Standby Cooling System System- -

Emergency Cooling Water System (CSCS-ECWS) (CSCS-ECWS) components.

components.

The UHS also provides a source of emergency makeup water for the spent spent fuel fuel pools pools and and can can provide water provide water forfor fire fire protection protection equipment.

equipment. Loss Loss of UHS inventory due to spent spent fuelfuel pool pool makeup and fire protection usage is considered in the UHS analyses for for both both thethe temperature temperature response and the inventory response. response.

There are four temperature measuring instruments used used for monitoring monitoring the the temperature temperature of of the the lake cooling water provided to the plant. These Theseinstruments instrumentsare arelocated locatedininthe thecirculating circulatingwaterwater (CW) system inlet thermowells (Le.,

(CW) system (i.e., two per unit), that provide input to the Plant Process Process Computer (PPC). The Theoutputs outputsof ofthese theseinstruments instrumentsare areused usedtotomonitor monitorand andtrendtrendthe the temperature of of the lake cooling water temperature supplied supplied to to the the plant plant viavia the the PPC, PPC, and and are are utilized in verifying the requirement of SR 3.7.3.1 is met at a 24-hour 24-hour frequency as as required by required by the LSCS LSCS Surveillance Frequency Control Control Program Program (SFCP).

(SFCP). Since Since the the UHS UHS is is an an integral integral part part of the cooling lake, an excavated pond at at the outlet outlet of of the the cooling cooling lake, lake, UHS UHS temperature temperature is is the the same as the lake cooling cooling water temperature.

temperature. Reference Reference 11 documents documents the the fact fact that that the two-channel average uncertainty uncertainty in in the UHS UHS temperature temperature measurement measurement is less than than 0.75 0.75OF.of.

The calculated calculated uncertainty uncertainty for for one one available availablelooploopisis+0.74

+0.74OF of and for two available available loopsloops isis

+0.53 OF. of. It is considered extremely extremely unlikely unlikely that that three three ofofthe thefour fourresistance resistancetemperature temperature detectors or associated circuitry would be be unavailable unavailable simultaneously.

simultaneously. InInthe theunlikely unlikelyevent eventthisthis condition condition were were to to occur, occur, thethe 0.75 0.75 OFof allowance for conservatism bounds bounds the the instrument instrument uncertainties associated with any any combination combination of of operable operable temperature temperature measurement measurement devices devices to to meet the requirements requirements of of SR SR 3.7.3.1.

3.7.3.1.

Recent Recent summer summermeteorological meteorological conditions conditions have haveresulted resulted in in the the TS TS UHS UHS temperature temperaturelimit limitbeing being challenged. These challenged. These conditionsconditions include elevated air temperatures, elevated air temperatures, high high humidity, humidity, and and lowlow wind wind speed.

speed. Weather Weatherconditions conditions in in the the future future may maycontinue continuechallenging challenging the thecurrent current TS TS limit limit ofof

<_ 101.25 OF.

s; 101.25 oF.

This This license license amendment amendment is is being being sought sought to to allow allow the the TS TS temperature temperature limit limit ofofthethe cooling cooling water water supplied to the plant from the UHS to vary with the diurnal cycle supplied to the plant from the UHS to vary with the diurnal cycle and to account for recent and to account for recent Page Page 55of of21 21

ATTACHMENT1I ATTACHMENT Evaluation of Evaluation of Proposed Proposed Change weather data that is weather is more more severe than historical weather data historical weather data used used in in the the current current analyses.

analyses. TheThe proposed TS proposed TS amendment includes includes a graph graph depicting depicting the allowable initial initial UHS temperature temperature as as aa function of function oftime time of ofday.

day. Following Following approval of the proposed change, TS TS 3.7.3, 3.7. 3, Required Required Actions C.

Actions C.1 and1 and C.2C.2 would would be entered concurrently concurrently ififthe the UHS UHS temperature exceeds the allowable UHS temperature at allowable at aa given given time, time, requiring requiring bothboth LSCS units units toto be placed placed in in Mode 3 within 12 within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, hours, and and Mode 44 withinwithin 36 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

hours.

4.0 TECHNICAL ANALYSIS

TECHNICAL ANALYSIS The UHS removes heat from both units' units' reactor reactor cores following the UHS UHS design design basis basis event event in in which the units are cooled which cooled down down using using Residual Residual HeatHeat Removal Removal (RHR) (RHR) operation.

operation. The function the UHS is to provide cooling of the RHR of the RHR heat exchangers, diesel diesel generator generator (DG) (DG) coolers, coolers, ECCS cubicle area cooling coils, RHR pump seal coolers, and LPCS pump motor ECCS motor cooling coils.coils.

The RHRSW and DGCW DGCW subsystems circulate UHS UHS cooling cooling water water through through the the associated associated heat heat exchangers to maintain maintain process temperatures temperatures within within design design limits.

limits. The UHS UHS provides indirect heat rejection rejection for for the the containment containment through through the the RHR RHR heatheat exchangers.

exchangers. Attachment 5 discusses the impact of of 107 107 OF UHS cooling of UHS cooling water water on on the design functions of of Core Standby Standby Cooling Cooling System - Emergency Emergency Cooling Cooling Water WaterSystem System (CSCS-ECWS)

(CSCS-ECWS)components. components.

The drywells for LSCS, LSCS, Units 1 and 2 are are designed designed for for aa maximum maximum pressure pressure of of4545 psig.

psig. The limiting piping rupture inside containment for each unit has been limiting been evaluated to be be aa double-double-ended guillotine shear of of a recirculation recirculation line. Peak Peakdrywell drywellpressure pressureoccursoccurswithinwithinapproximately approximately 12 seconds of the recirculation line break. During During this thisperiod periodof ofpeak peakdrywell drywellpressure pressurethe theUHSUHS temperature does does not not impact impact thethe drywell drywell pressure pressure response response sincesince thethe pressure pressure increase increase is is rapidly mitigated through the containment design via via the drywell drywell floor downcomers downcomers and and the the suppression pool, pool, without any support support fromfrom the UHS.UHS.

As discussed in in LSCS LSCS Updated Updated FinalFinal Safety Safety Analysis Analysis Report Report (UFSAR)

(UFSAR) Section Section 6.2.1.1.3.1.1, 6.2.1.1.3.1.1, "Recirculation Line Line Rupture," the RHR heat exchanger is manually initiated RHR heat exchanger is manually initiated at approximately at approximately 600 seconds into into the the event.

event. As Asdescribed describedininAttachment Attachment5,5,once onceinitiated, initiated,the theRHRRHRsystem system continues to possess possess the capability capability toto remove remove the the required required accident accident energy energy from from containment, containment, maintaining the long term suppression pool pool temperature within limits limits with a maximum UHS UHS temperature temperature of of 107 107OF. of. Impacts Impacts on on the the structural structural integrity integrityof ofthe theUHSUHSoperating operatingatat107 107OF of have have been evaluated as as acceptable acceptable underunder LSCS LSCS Engineering Engineering Change Change (EC) (EC) 389677.

389677. The The consequences consequences of of the the UHS UHS design design basis basis event event remain remain unchanged unchanged becausebecause containment containment parameters, peak peak accident accident pressure pressure and and suppression suppressionpool pooltemperature, temperature,remain remainwithinwithindesign design limits.

limits.

The The safety safety design design basesbases forfor UHS UHS areare documented documented in in the the LSCS LSCS UFSARUFSAR Section Section 9.2.6, 9.2.6, "Ultimate "Ultimate Heat Heat Sink."

Sink." InInthetheunlikely unlikelyevent eventthatthatthe thecooling coolinglakelakedikedikeisisbreached, breached,the thesubmerged submergedpond pondisis designed designed to to provide provide the UHS UHS for LSCS.LSCS. All All analyses analyses performed performed assumeassume that that the the cooling cooling lake lake dike fails instantaneously concurrent with the dike fails instantaneously concurrent with the UHS design basis UHS design basis event.

event. TheTheUHS UHSisisdesigned designedinin accordance accordance with with RGRG 1.27, 1.27, Revision Revision 1, 1, which which requires requires aa 30-day 30-day supply supply of of cooling cooling water water bebe available available during during the the worst worst period period ofof recorded recorded weather weather conditions.

conditions. The Thebasis basisprovided providedinin Regulatory Regulatory Guide Guide 1.27,1.27, Revision Revision11and andNUREG-0693 NUREG-0693was wasemployed employedfor forthe the transient transient analysis analysis ofof the the LSCS LSCS UHS.UHS.

Page Page 66of of2121

ATTACHMENT 1 ATTACHMENT Evaluation of Evaluation of Proposed Proposed ChangeChange Although, the Although, the LSCS LSCS UFSAR, UFSAR, Appendix Appendix B states states that that LSCS LSCS complies complies withwith the requirements of of RG 1.27, RG 1.27, Revision Revision 1, 1, previous previous revisions revisions of the the LSCS LSCS UHS design analysis have included included the the effects on effects on the the UHS UHS model model using using the the worst five-day five-day period followed by the worst single-day and and then the then the worst worst 30-day 30-day period period (i(i.e., 5-1-30). Use of the 5-1-30 approach resulted in allowable

.e., 5-1-30).

initial temperatures initial temperatures that were 0.3 0.3 OF of toto 0.6 0.6 of OFhigher higherthan thanthose those determined determined using RG 1.27, 1.27, Revision Revision 1 methodology that that uses the the worst 1-day followed followed by the worst 30-day period (i.e., 1-30). Although (Le., Although the use of RG 1.27, Revision 2 methodology provided provided additional additional operating operating margin, LSCS did not elect to alter its commitment to margin, to RG RG 1.27, Revision 1.

Verification of the Verification the temperature temperature of the water supplied to the plant from the cooling lake lake ensures ensures that the temperature-related temperature-related aspects of the heat removal capabilities of of the RHRSW RHRSW Subsystem Subsystem and DGCW Subsystem and Subsystem are are within within thethe assumptions assumptions of of the the design design basis basis event event analyses.

analyses. To ensure that the maximum post-accident temperature (i.e., (Le., 107 °F) OF) of of water supplied to the plant plant is not exceeded, is exceeded, the the temperature during normal plant operation must be maintained less less than than limit. The the TS limit. The proposed proposed TS TS limit limit accounts accounts for for the UHS UHS design design requirement requirement that it provide cooling water supply to the plant for 30 days without makeup, while adequate cooling while taking taking intointo account plant accident energy during the worst historical weather conditions with with the worstworst case case sedimentation allowed by by TS TS (i.e.,

(Le., 1.51.5 feet).

feet).

The LSCS CSCS pond sediment deposition deposition surveillance surveillance (i.e.,

(Le., SRSR 3.7.3.2) 3.7.3.2) is is conducted conducted at at aa biennial frequency in accordance with the LSCS Surveillance Frequency Frequency ControlControl Program.

Program. The The surveillance is performed by certified hydrographer hydrographers s who assess the pond pond condition condition in in accordance with the Class I hydrographic survey standards established by by the the U.S.

U.S. Army Army Corps Corps of Engineers. The accuracy of these The accuracy of these surveys surveys is is estimated estimated to to be be approximatel approximately y ++ 0.2 0.2 ft. OnceOnce the CSCS pond survey is complete, the results results are are reviewed reviewed and and approved approved by by LSCS LSCS Engineering in accordance with LSCS LSCS Procedure ProcedureLTS-1 LTS-1 000-4, "CSCS "CSCS Pond Pond Surveillance."

Surveillance."

In response to a concern with the the volume volume of ofthe the UHS UHSdetermined determinedusing usingoriginal original1981 1981 hydrographic survey results, identified in 1997, a new hydrographic hydrographic survey survey using using more more accurate accurate instrumentati instrumentation on was performed. The UHS surface performed. The UHS surface areaand area andvolume volumedetermination determinations resulting s resulting from the 1997 1997 survey survey metmet design design and and licensing licensing basis basis requirements requirements.. These These1997 1997survey surveyresultsresults are are therefore therefore now now used as as the baseline baseline for for comparing comparing subsequent subsequent survey survey results results and and determining determining compliance compliance with Technical Technical Specification Specification Surveillance Surveillance Requirements Requirements.. The Themost most current current biennial biennial UHSUHS pond pond sediment sediment deposition deposition surveillance, surveillance, performed performed in in 2010, 2010, indicates indicates the the sediment sediment deposition deposition changes changes since since the the previous previous survey survey in in 2008 2008 have have been been insignificant, insignificant, and and the the largest largest difference difference as compared to 1997 1997 andand 1999 1999 results results is is 0.4 0.4 feet feet (ft)

(ft) in in certain certain areas areas in in the the southeast southeast quadrant quadrant of of the UHS.

UHS. Also, Also,as ascompared comparedtoto1997 1997and and1999 1999results resultsthere thereisisminimal minimal depth change (i.e., < 0.4 ft) throughout depth change (Le., < 0.4 ft) throughout the the UHS UHS bottom bottom with with the the exception exception of ofsome some veryvery localized localized areas areas with with sediment sediment deposition deposition of of approximately approximately one one toto two two feet feet mainly mainly at at the the CSCS CSCS outfall outfall structure structure andand along along the the sloped sloped embankment embankment areas areas of of the the UHS.

UHS. Furthermore, Furthermore,when whenthesethese areas areas were were compared compared to to 2006 2006and and20082008data,data,changes changeswere werenegligible negligible(i.e., +/-0.1 (Le.,+/- 0.1feet).

feet).

The The average averagesediment sedimentdeposition deposition across across the the UHS UHS hashas notnot changed changed appreciably appreciably betweenbetweenthe the biennial sediment deposition surveillances biennial sediment deposition surveillances.. The Thenext nextsediment sedimentdeposition depositionhydrographic hydrographicsurvey survey is is currently currently scheduled to to be be performed performed in in July July 2012.

2012.

Based Based on on the the historical historical UHS UHS sedimentation sedimentationtrends trendsdiscussed discussedabove, above,no nochange changetotothe thebiennial biennial frequency frequency of ofthe thesediment sedimentdeposition depositionsurveillance surveillanceisisbeingbeingproposed.

proposed.

Page Page77ofof21 21

ATTACHMENT 1 ATTACHMENT Evaluation of Evaluation of Proposed Proposed Change Change In addition, In addition, since since the the CSCS CSCS pond pond temperature temperature follows follows a diurnal diurnal cycle (Le.,

(i.e., itit heats up during the day and day and cools cools off off at at night),

night), the the allowable initial initial UHS temperature varies with with the time of day.

The allowable The allowable initial initial UHS UHS temperature temperature profile, profile, based on the time of day has been determined by analysis (Le.,

analysis (i.e., Reference 2).

The rate The rate ofof temperature temperature change change of of the the LSCS LSCS cooling cooling lake lakeisisrelatively relativelyslow.

slow. Additionally, Additionally, thethe lake inlet lake inlet temperature temperature to to the the plant is is constantly available for viewing and trending in the Main Control Room Control Room usingusing the the PPC.

PPC. This This allows allows an increase increase in the monitoring frequency of the parameter should parameter should thethe cooling cooling water temperature approach the TS limit as proposed in the new TS 3.7.3, TS 3.7.3, Condition Condition B B above.

above. The The PPC PPC can can display display each each of of the four temperatures as a single point and the average point and the average for each unit. In addition, each of theCW unit. In addition, each of the CWinlet inlettemperature temperaturedata datapoints points are set to are to provide a PPC alarm at a predefined temperature value. The Thealarm alarmconsists consistsof ofan an audible alert and audible and an associated message on the PPC. Upon Uponapproval approvalofofthe theproposed proposedchange, change, the individual PPC computer alarm points will be be adjusted to the new new TS TS 3.7.3 3.7.3 Condition Condition of of 101 OF.

101°F.

A rectangular channelchannel equivalent model model of the the LSCS LSCS UHS UHS is is used used toto screen screen weather weather data.data. The weather data creating the highest UHS UHS 24-hour 24-hour average temperature response response is is characterized characterized as the worst 24-hour temperature period. The Theworst worst30-day 3~-daytemperature temperatureperiod periodisissimilarly similarly determined. The The current currentUHS UHSTS TSanalysis analysisusesusesmeteorological meteorologicalweatherweatherstation stationdata datafrom from Peoria, IL and Springfield, IL for the dates between July 4, Peoria, 1948, and June 30, 4,1948, 1996. The 30,1996. The proposed UHS TS Analysis (i.e., (Le., Reference Reference 2) uses uses meteorological weather data from LaSalle LaSalle County Station and Peoria, IL for the period spanning January 1, 1, 1995, September 3D, 2010.

1995, to September 30, 2010.

Wind speed, wind direction, and and dry-bulb dry-bulb temperature temperature data data were were taken taken from from an an on-site on-site meteorological tower at LSCS. Humidity, Humidity,precipitation precipitationtype, type, cloud cloudheight, height,and andcloud cloudcover coverdata data were not available from the the on-site on-site meteorological meteorological tower,tower, andand were were taken taken fromfrom aa National National Weather Service observation station station atat the the Peoria, Peoria, ILIL airport airport which which is is approximately approximately 70 70 miles miles southwest of of LSCS.

LSCS.

The meteorological measurements measurements program program at at the the LSCS LSCS sitesite consists consists of of instruments instruments that that monitor wind direction, wind speed, speed, ambient ambient temperature, temperature, and and precipitation.

precipitation. The Thedata, data, referenced in in ANSI/ANS 2.5, 2.5, "Standard "Standard for for Determining Determining Meteorological Meteorological Information Information at at Nuclear Nuclear Power Stations," dated dated 1984, 1984, are are used used toto determine determine the the meteorological meteorological conditions conditions prevailing prevailing atat LSCS. The TheLSCSLSCSmeteorological meteorologicaltower towerisisequipped equippedwith withinstrumentation instrumentationthat thatconforms conformstotothe the system system accuracy accuracy recommendations recommendations of of RG RG 1.23, 1.23, "Onsite "Onsite Meteorological Meteorological Programs,"

Programs," Revision Revision 0, 0, and and ANSI/ANS ANSI/ANS 2.5, 2.5, 1984.

1984.

The The weather weather data data was was evaluated evaluated to to determine determine the the worst worst 24-hour 24-hour and and 30-day 3~-day weather weather periods periods resulting resulting in in maximum maximum plantplantintake intaketemperature temperature(i.e., (Le.,minimum minimumheat heattransfer transfertotothe theatmosphere) atmosphere) and and for for the the worst worst 30-day 3~-day period period of of net net evaporation.

evaporation. The Thefollowing followingsummarize summarizethe theresults resultsofofthe the limiting limiting weather weatherdata data periods.

periods.

Page Page 8of21 8 of 21

ATTACHMENT 1 ATTACHMENT Evaluation of Evaluation of Proposed Proposed Change Change Current UHS Current UHS TS TS Analysis Analysis Weather Period Weather Period Analyzed:

Analyzed: July 4, July 4, 1948, 1948, through through JuneJune 30, 30, 1996 Worst Temperature Worst Temperature Weather Periods:

1-day: July 1-day: July 15 15 toto July 16, 1995 30-day: July 30-day: July 10, 10, 1983 1983 to to August August 9, 9, 1983 Worst 30-Day Worst 30-Day Evaporation Evaporation Weather Period: Period: June June 18,18, 1954, 1954, to to July July 18, 18, 1954 1954 Proposed UHS TS Analysis Proposed Weather PeriodPeriod Analyzed: July 4, 1948, through through June 30, 1996 1996(Peoria (Peoriaand andSpringfield, Springfield, IL) IL)

January 1,1995 January 1, 1995 to September 30,2010 30, 2010 (LSCS and Peoria, and Peoria, IL)

Worst Temperature Weather Weather Periods:

Periods:

1-day: July 1-day: July24, 2001, 6:00 a.m.

24,2001,6:00 a.m. to toJuly July25, 25, 2001, 2001,6:006:00 a.m. a.m.

30-day: July 21, 30-day: 21, 1995, 3:00 p.m. to August 20, 1995, 1995, 3:00 p.m. p.m.

Worst 30-Day Evaporation Weather Period: June June 18, 18, 1954, 1954, to to July July18,18, 1954 1954 The weather at Peoria Peoria andand Springfield, Springfield, IL is is not not statistically statistically different different from from that that atat LSCS.

LSCS. The LSCS weather data includes wind speed and dry-bulb temperature, both both of of which which are are contributing factors to the net heat transfer to the UHS. AAcomparison comparisonofofthe theaverage averagewind wind speed and dry-bulb temperature weather data data from LSCS LSCS to to Peoria, Peoria, IL IL for for the the 3030 day day period period of of July 21, 1995, 1995, to August 20, 1995, indicates that onsite wind speed and 1995, indicates that onsite wind speed and dry-bulb temperature dry-bulb temperature are slightly less than at Peoria, Peoria, IL.

IL. Even Eventhough thoughthe therevised revisedlimiting limiting30-day 30-dayperiodperiodfell fellwithin withinthethe same period evaluated in previous analyses, analyses, the the use use of of onsite onsite data data resulted resulted in in the the selection selection of ofaa different limiting 30-day period that results in in the maximum maximum plant plant intake intake temperature temperature than than thethe limiting period that was selected selected based based on on the the use use of regional regional data data alone.

alone. Therefore, Therefore, the the use use of of LSCS onsite data was determined to be be conservative.

conservative. The Thehour-by-hour hour-by-hourweather weatherdata datafor forthe the worst worst 24-hour 24-hour and and 30-day 30-day periods periods used used inin the the Reference Reference 22 analysis analysis isis provided provided in in Attachment Attachment6. 6.

The The transit transit time time ofof the the plant plant accident accident energy energy through through the the UHS UHS is is determined determined by by using using the the effective effective volume volume of of the the UHSUHS divided divided byby the the total total plant plant cooling cooling water water flow flow rate rate through through the the pond.

pond.

This This time time was was determined determined to to be be approximately approximately 30 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> hours assuming assuming the the maximum maximum allowableallowable sediment sediment of of 1.5 1.5 feet feet in in the the UHS.

UHS. TheTheUHS UHStemperature temperatureremains remainsless lessthan than107 107OF of for for the the entire entire 30-day 30-day period.

period.

For For the the limiting limiting period, period, assuming assuming 1.5 1.5 feet of of sedimentation sedimentation in in the the CSCS CSCS pond, pond, eight eight different different start start times times were were evaluated evaluated to to determine determine the the limiting limiting time time of of day day forfor the the design design basisbasis event eventto to occur.

occur. TheTheanalyzed analyzedtimestimesareare00:00, 03:00, 06:00, 09:00, 12:00, 15:00, 18:00, and 00:00,03:00,06:00,09:00,12:00,15:00,18:00, and 21:00.

21:00. For For the the times times occurring occurring prior prior to to the the worst worst 24-hour 24-hour period period (i.e.,

(Le., 00:00 00:00 and and 03:00),

03:00), the the existing existing weather weather data data for for that that day day was was used used (i.e.,

(Le., weather weather datadata from from July July 24, 24, 2001, 2001, at at 00:00 00:00 and and 03:00).

03:00). This Thiswaswas considered considered conservative conservative such such that that the the majority majority of ofthe the event event occurred occurred during during thetheworst worst24-hour 24-hour Page Page99ofof21 21

ATTACHMENT ATTACHMENT 1I Evaluation Evaluation of of Proposed Proposed Change period while considering period while considering the accident the accident energy transitenergy transit time through time through the UHSthe UHS of approximately 30 of approximately 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

hours.

The The same logic was applied when combining the worst 24-hour 24-hour period with the worst worst 30-day 30-day period; existing period; existing weather weather data from from the beginning of the worst 30-day period was used to bridge bridge the time the time to to the the end end of thethe worst worst 24 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period.

period. The The worst worst 30 30 day day period period ends on August 20, 1995, at 1995, at 15:00.

15:00. Therefore Therefore the the weather weather datadata from from July July 21, 21, 1995, 1995, atat00:00 00:00to to 15:00 15:00waswasusedusedto to bridge the worst-24 hour period bridge period to the the worst worst 30-day 30-day period.

period.

As discussed above, the worst 30-day period for UHS UHS inventory inventory lossloss was confirmed confirmed to to be be the the existing existing period period starting starting on on June June 18, 18, 1954.

1954. TheThe maximum maximum inventory inventory loss was determined to result result inin aa loss loss of 2.29 2.29 feet feet of of UHS UHS level. The decay level. The decay heat heat from the units used in the analysis is based based on on a reactor power level of 4067 megawatts thermal (MWT), while each unit is currently licensed licensed to to 3546 3546 MWT.

MWT. The The analysis analysis was was performed performed at the higher power level in anticipation of a future power uprate on on both both LSCSLSCS units.

units.

The computer program program used used to to model model thethe LaSalle UHS UHS during during thethe design design event is is LAKET-PC developed by Sargent Sargent and and Lundy Lundy in in 1976 1976as asaaone-dimensional one-dimensionalthermal thermalprediction predictionmodelmodelfor for bodies bodies of of water.

water. The Themodel model assumes assumesthat thatthe the temperature temperatureis is constant constant at at any any point point along along the plane perpendicular to the direction direction of of the the flow.

flow. The The one onedimensional dimensional model model assumptions assumptions coerce the water body into into an an idealized rectangular rectangular channel.

channel. The Themovement movementof offluid fluid through through the one-dimensional channel is envisioned envisioned as a series series of of individual, individual, distinct distinct fluid fluidsegments.

segments. Each segment has an an individual individual length and temperature, while while thethe width width and depth depth remain remain constant constant for all. The channelchannel thusthus forms aa queue queue of of fluid fluid segments, where where additions additions are are made madeat atthe the inlet, inlet, and and deletions deletions are are made at the outlet. outlet. Any Any segment segment that that enters enters the the channel channel willwill cause cause an an equal amount to be expelled at at the outlet.

outlet. TheTheprogram programassumes assumesthat thatall all segments segmentsare areuniform uniform in temperature, in temperature, and each segment segment is is allowed to react independently independently with with thethe environment.

environment. The The horizontal horizontal heat conduction for each segment segment is is assumed assumed to to be benegligible negligiblewith with respect respectto tothe the heat rejection at the air-waterair-water interface interface andand is is ignored.

ignored. Similarly, Similarly, conductive conductive heat heatloss lossat atthe the water water channel channel interface interfaceis is ignored.

ignored.

The methodology used used inin LAKET-PC LAKET-PC is consistent with the thermal model model presented presented in in NUREG-0693, and the wind speed functions presented in Massachusetts Institute of Institute of Technology Report Report No.No. 161, 161, "An"An Analytical and and Experimental Experimental Study Study of of Transient Cooling Cooling Ponds Ponds Behavior," dated January 1973, which is also referenced and cited in NUREG-0693. Consistent Consistent NUREG-0693, the with NUREG-0693, the LAKET-PC LAKET-PC contributing contributing components components for for the the net net heat heat transfer transfer toto the the UHS UHS are:

are:

Q=QSN+QAN-QBR-QE-QC+QRJ Where:

Where:

QSN =

Q SN =net net incident incident short short wave solar solar radiation radiation QAN QAN == net incident long net incident long wave wave atmospheric radiation radiation QBR =

Q BR =net netrate rateofof long long wave wave back radiation from the the lake lake surface surface QE Q E == net net rate of heat loss due to evaporation evaporation Qc Qc = net rate of of heat heat loss loss duedue to to conduction conduction and and convection convection QRJ =

QRJ = net net rate rate ofof heat heat rejected to the lake lake by by thethe plant plant Page 10 Page of21 10 of 21

ATTACHMENT ATTACHMENT 1I Evaluation of Evaluation of Proposed Proposed ChangeChange abl e 1 TTable ..

1: CComparison omparrson 0offH Heat eatLLoadoa dE :quarIons Equations N U REG -0693 NUREG-0693 LAKET-PC LAKET-PC QSN QSN Measured Measured value value Calculated Calculated based based on on measured values:

2 Incident: Q Incident: Qsc(1.0-0.65C) sd1.0-0.65C )

Reflected: 0.06QS Reflected: 0.06QSN(incident)

N(incident) 2 Net: 0.94Q Net: 0.94Qsc s 1.0-0.65C2 d1.0-0.65C )

1.2x10-13 1.2x10- 13 (T(TA+460)6(1+0.17C')

+460)6(1 +0.17C 2 Incident:

Incident: 1.2x1 1.2x10 "13(TA 0-13(T +460)6(1 +0.17C 2)

QAN QAN A ) A+460)6(1+0.17C2)

Reflected: 0.03 QAN(inCident)

Reflected: QAN(incident)

Net: 1.16x1 0-13(T Net: 1.16x10"13 A+460)6(1 TA+460 +0.17C 2) 6 1+0.17C2 QBR 4.026x10" QBR 4.026x1 460+TS 0-tl(460+ TS)4 4x1 4x10"0-tl(460+

460+Ts Tst QEQE (es (es -- eA) eA) F(w) (es-(es - e&F(w) eA) F(w)

Qc Qc 0.26 Ts-TAFw 0.26(T s-TA)F(w) 0.255 Ts-TA 0.255(T Fw s-TA)F(w)

QRJ Plant heat load input Plant heat load Plant load input where:

Qsc =

Qsc = clear clear skysky sunlight sunlight fromfrom an an average insolation curve

=

C = fraction of sky covered by clouds clouds (0.0-1.0)

(0.0-1.0)

TA =

TA = dry dry bulb bulb air temperature (°F) (OF)

TTs =

s = water surface temperature (°F) (OF)

=

es = saturated vapor pressure pressure at at Ts T s (mmHg)

(mmHg) eA =

eA= vapor pressure at at TA and relative humidity (mmHg)

TA and (mmHg)

F(w) =

= wind function F(w) wind function (LAKET-PC (LAKET-PC uses the Ryan wind function when the UHS UHS surface surface temperature is 2.5 OF higherthan of higher than the the natural natural temperature temperature and uses the Lake Lake Hefner Hefner wind wind function when the surface temperature is less than 2.5 OF. functions are of. Both wind functions are taken taken from from MIT Report No. No. 161.)

161.)

Changes Changes in in UHS UHSAnalysis Analysisfrom fromcurrent currentanalysis analysisto toproposed proposedanalysis:

analysis:

• • Effective Effective UHS volume changed changed from from 0.90.9 x UHS UHS volume volume to 0.634 xx UHS UHS volume (surface (surface area is 0.579 is 0.579 x UHS UHS surface area) area)

• Weather Weather data data includes includes available availableonsite onsite meteorological meteorological data dataand andregional regionalweather weatherdata.data.

• • Decay heat from reactors Decay heat from reactors is based on is based on 102% of 112.5% of of 112.5% of CLTP CLTP

• Fuel poolpool cooling cooling is replaced by by emergency emergency fuel fuel pool pool makeup makeupdue  ::Iuetotothe thefactfactthat thatfuel fuelpool pool cooling would be be lost lost during during aa loss loss of of offsite offsite power power (LOOP).

(LOOP). Emergency Emergency fuel fuel pool pool makeup makeup isis assumed to be 300 300 gpmgpm forfor each each unitunit

• • A A volume volume of of 440,400 440,400 gallons gallons is is removed from from UHSUHSatatstart startofofevent eventfor forfire firefighting fighting

• • TS TS allowable allowableinitialinitial temperatures temperaturesinclude includeaaminimum minimum0.42 0.42OF OFconservatism conservatism while while current current TS TS conservatism conservatism isis0.3 0.3OF.OF.

Page Page 11 11 ofof21 21

ATTACHMENT ATTACHMENT 1 Evaluation of Evaluation of Proposed Proposed Change Change Analysis Assumptions:

Analysis

1. The

1. The analysis analysis assumed assumed 18 18 inches inchesof ofsediment sedimentininthe theCSCS CSCSpond. pond. However, However, the the CSCS CSCS pond pond has little has littlemeasurable measurable accumulation accumulationof ofsediment sedimentinin30 30years.

years. The impact impact on maximum post post design basis design basis event event UHS temperature temperature of of the the additional additional volume volume of of water water that that isis present present with with less sediment less sediment is approximately aa 0.5 0.5OF of reduction reduction with with 12 inches inches of of sediment, sediment, and a 0.9 0.9 OFof reduction ifif six reduction six inches inches of of sediment sediment is assumed.

Analysis assumes an instantaneous failure of the LSCS cooling

2. Analysis cooling lake lake concurrent with with the UHS design basis event. No UHS Nocredit creditis is taken taken forfor the the cooling cooling lake lake volume volume that would exist during the during the time time forfor the the 2,058 2,058 acre acre lakelake with with aa volume volume of ofapproximately approximately 31,000 31,000 acre-feet acre-feet to drain through the drain through the assumed assumed dike failure. Additionally, failure. Additionally, no creditno credit is taken for any of the residual water that would exist in the lake pockets residual pockets following following the dike failure.

3.

3. Plant design Plant design bases assume a continuous post-design basis continuous post-design basis event UHS UHS temperature temperature of of 107 OF. Analysis, 107 of. Analysis, as shown shown in in Figure Figure 66 below, below, determined determined that that thethe UHS post post accident temperature profile is is dominated dominated by by diurnal diurnal environmental environmental effects, effects, and and that that the the UHS UHS remains remains temperatures near 107 of at temperatures O F for for less less than than 66 hours7.638889e-4 days <br />0.0183 hours <br />1.09127e-4 weeks <br />2.5113e-5 months <br /> hours of of the the 31-day 31-day copingcoping period. equates period. This equates to less to less than than 1 I%% of ofthe the coping coping time.time.

Proposed TS values provide

4. Proposed provide aa minimum minimum of 0.42 0.42Oof F of conservatism from all allowable allowable initial initial temperatures. The temperatures. The current current TS limit of of 101 .25 of 101.25 OFwaswas developed developed by subtracting subtracting 0.3 OF of from from the minimum allowable initial temperature. Allowable initial temperature. Allowable initial initial temperatures temperatures greater greaterthanthan 104 OF 104 were conservatively limited of were limited to 104 104 OF.of. For example, the the initial initial allowable temperature at 21 21:00:00 is is 105.83 105.83OF, while the of, while the proposed proposed TS TS allowable allowabletemperature temperatureatatthis thistime timeisislimited limited toto 104 OF.

104 of.

5. The accident energy deposited deposited in in the the UHS is is assumed to be the decay decay heat heat generated generated by by 102% of of 112.

112.5%5% of the current licensed thermal power power for for each each unit.unit. Additionally, Additionally, 105% of the sensible heat from both reactors is conservatively conservatively assumed assumed to to be deposited in the UHS UHS within the firstfirst six hours of of the the event.

event.

6. No thermal losses losses are are assumed assumed from from the the buried buried piping piping extending extending from the UHS UHS to to the the plant plant (i.e.,

(Le., three 36 36 inch inch lines, lines, one 30 30 inch inch line, line, and and two two 14 14 inch inch lines, lines, each approximately approximately 1000 1000 feet in length). Likewise, Likewise,no nothermal thermallosses lossesare areassumed assumedfrom fromthe theburied buriedpiping pipingfrom fromthethe plant returning returning to to the the UHS (i.e., (Le., twotwo 48 48inch inch lines lines and and two two 20 20inchinchlines lineseach eachapproximately approximately 5000 5000 feetfeet in in length).

length).

7. All All CSCS CSCS and ECCS ECCSpumps pumpsare areassumed assumedto tooperate operateduring during the the entire entire 31-day 31-daypost postdesign design basis event period. All pump brake period. All pump brake-horsepower - horsepower is is assumed assumed to to be be continuously continuously deposited deposited into the UHS.UHS.

8.

8. Both emergency fuel fuel pool pool makeup makeup pumps pumps are are assumed assumed to to supply supply 300 300gpm gpmfrom from the theUHSUHStoto each each unit's unit's fuel fuel pool pool during during the the entire entire 31 -day period.

31-day period. The The maximum maximum boiloff boiloff rate for each each fuel fuel pool, pool, assuming assuming aa recentrecent fullfull core core off off load load in in each each pool, pool, is is 140 140gpm. gpm.

9.

9. AA volume volume of of 440,400 440,400 gallons gallons is is removed removed from from thethe UHS UHSatatthe theinitiation initiationof ofthe thedesign designbasis basis event event for for potential potential firefighting firefighting purposes; however, however, no noconcurrent concurrentfires firesare areassumed assumedininthis this event.

event.

10.

10. The The LAKET-LAKET-PC PC model model evaluates evaluates the the UHSUHSas asaaoneonedimensional dimensionalmodel modelassuming assuming temperature isis constant temperature constant at at any anypoint point along along thetheplane planeperpendicular perpendiculartotothe thedirection directionofofflow.

flow.

The total The total UHS UHSsurface surfacearea areaand andvolume volumehave havebeenbeenreduced reducedtotoapproximately approximately57.9% 57.9%ofofthe the area and 63.4% of the volume to account for areas of the area and 63.4% of the volume to account for areas of the UHS that would not be actively UHS that would not be actively involved involved in in the the main main water waterflow.flow.

Page 12 Page 12ofof2121

ATTACHMENT 11 Evaluation of Proposed Change Evaluation This analysis determined the maximum allowable initial initial UHS UHS temperature, temperature, in in accordance accordance with RG 1.27, Revision 1 and NUREG-0693 with NUREG-0693 methodologymethodology based based on on the thetime timeofofday dayaadesign design basis event basis event occurs.

occurs. This This method method accounts accounts for for observed observed diurnal diurnal temperature temperature behavior.

behavior. The The derived the maximum initial UHS temperature at analysis derived at the the onset onset of a design basis of a design basis eventevent at three-hour intervals beginning at midnight (i.e., (Le., 00:00, 03:00, 06:00, 09:00, 12:00, 00:00,03:00,06:00,09:00, 12:00, 15:00, 15:00, 18:00, and 18:00, and 21 21:00).

00). The maximum derived derived initial temperatures were selected such that the water will plant intake water will not exceed its design basis temperature temperature at at any any point point during during thethe 30-30-day post-accident day post-accident period period discussed discussed in in RG RG 1.27, 1.27, Revision Revision 1. 1. For For example, example, thethe predicted predicted 72-72-hour post-accident UHS temperature profiles for design basis basis events events starting starting atat 66 a.m.

a.m. and and 99 p.m. using p.m. using the minimum initial UHS temperature derived by by analysis, analysis, maximum maximum allowedallowed sedimentation (Le.,(i.e., 1.5 feet),

feet), and worst-case one-day and and 30-day 30-day meteorological meteorological conditions conditions is shown in Figures 4 and 5, 5, respectively.

respectively.

109.00 1 07.001-----:;;-o...._---------=--==--------------------j 107.00 u:::-

!II 105.00 I---f-----~-----I----_>.__----------------j CII een

~ 103.00 1 - - 7 ' ' - - - - - - - - - - - - - ' . . _ - - - - - / - - - - - - ' \ , - - - - - - - - - - - - - - - - - - 1

.g...e 101.00 1 - - - - - - - - - - - - - - - - ' " " " - - - - -

CII Co E 99.00 1 - - - - - - - - - - - - - - - - - - - - - - - - - -

t!

97.00 I-------------------------------'~

95.00 95.00 !I--~~~-~~~~-"'---'--~--~-'--~-~+-~~-~-------"-----'

SAM 6AM 6FM 6PM SAM 6AM 6FM 6PM SAM 6AM 6FM 6PM 6AM Day0 Day a Day 11 Day Day 2 Day Day33 Days Following Accident Accident Figure Figure 4: 4: 72-Hour Post Design Basis Basis Event UHS Temperature Profile Profile for Event Event Starting Starting at at 06:00 Page Page 13 13of21 of 21

ATTACHMENT 1I ATTACHMENT Evaluation of Evaluation of Proposed Proposed ChangeChange 109.00 , - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ,

109.00 107.00 k - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - j 107.00 u:-S! 105.00 105.00 I-~----___:=_------------------------l eCl

~ 103.00 I - - - - - " ' - I ; : - - - - : : ; : ; ; > . L - - - - \ - - - - - - - - - - - - - - - - - - - - - - - - j 103.00 e

~ 101.00101.00 1 - - - -

...CD Co

~ 99.00 99.00 I-------------T-f--"'...---~"------"<_-----_+----l I-97.00 97.00 95.00 !-

95.00 9PM 9PM 9AM 9AM 9FM 9PM 9AM 9PM 9FM 9AM 9PM 9A M 9FM Day 0 Day 0 Day11 Day Day Day 2 2 Day 3 Day 3 Days Following Accident Figure 5: 72-Hour Post Design Basis Event UHS Temperature Profile for Event Starting at 21:00 A 31-day temperature profile profile with with the the same same initial initial conditions conditions as as Figure Figure 44 is is shown shown in in Figure Figure 66 below.

110.00 , . . . . . . - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ,

u:- 105.00 1++++------------------------~----------------_1 fII CD eCl CD "tI

-; 100.00 1--1f-+-I+-i+---fl--f'r-tt-----It--t+-.---1-\--+t-ft-------.------+-'r-t1c-1-I--+1r-1

.a I!

CLCo C

CD G

E

~ 95.00 95.00 I--------------H-++-\+---'---~I__\+-H----

90.00 90.00 1 o

0 55 10 10 15 15 20 20 25 25 30 30 Days Following Days Following Accident Accident Figure Figure 6: 31-Day 31-Day PostPost Design Design Basis BasisEvent EventUHS UHSTemperature TemperatureProfileProfllefor for Event Event Starting Starting atat06:00 06:00 The The results results of of the the analysis analysis were were used used to to develop develop aa worst-case worst-case initial initial UHS UHS temperature temperature profile profile based on time of day at three-hour intervals throughout the day based on time of day at three-hour intervals throughout the day (Le., shown as Initial UHS (i.e., shown as Initial UHS Temperature Temperature That ThatEnsures EnsuresUHS UHSRemains RemainsLess LessThan Than107 107OFof in in Figure Figure 77 below).

below). TheThederived derived temperature temperature profiles profiles were were used used toto develop develop aa TS TS allowable allowable initial initial UHS UHS temperature temperature profile.

profile. The The proposed proposed TS TS temperature temperature limits limits are are based based on on the the results results of ofthe the analysis analysis described described above, above, aa Page Page14 14ofof2121

ATTACHMENT 1 ATTACHMENT Evaluation of Evaluation of Proposed Proposed ChangeChange 0.75 of 0.75 OFreduction reductiontotoaccount accountfor forsingle-channel single-channelUHS UHStemperature temperature instrument instrument uncertainty, uncertainty, andand an additional reduction additional reductionfor forconservatism conservatismas as shown shown in in the the Conservatism in in Proposed TS TS column column inin Table 22 below.

Table below. As discussed discussed in in Reference Reference 1, 1, the thecalculated calculateduncertainties uncertaintiesfor for one oneavailable available temperature instrument temperature instrument loop loop isis +0.74

+0.74 OF of and for two two available available loops is +0.53

+0.53 OF.

of. It It is considered considered extremely unlikely extremely unlikelythatthatthree threeof ofthe thefour fourresistance resistancetemperature temperature detectors detectors or associated associated circuitry circuitry would be would be unavailable simultaneously. In In the theunlikely unlikely event event this this condition condition were were to to occur, occur, the the 0.75 of 0.75 OFallowance allowancefor forconservatism conservatismbounds bounds the the instrument instrument uncertainties associated associatedwith with any any combination of combination ofoperable operabletemperature temperature measurement measurement devices devices toto meet meet the the requirements requirements of of SR SR 3.7.3.1.

3.7.3.1.

LL 0

~

107 106

....::::J e

CI) 105 0-E CI)

I- 104 en J: 103

J ca 102 E

c 101 00:00 00:00 03:00 03:00 06:00 06:00 09:00 09:00 12:00 12:00 15:0015:00 18:00 18:00 21:00 21 :00 24:0024:00 Time of Day Day

-^

-.-Proposed ProposedTSTSLimit Limit-.---Initial Initial UHS Temperature UHS Temperature That ThatEnsures EnsuresUHSUHSRemains Remains Less Than Less Than 107 OFof 107 Figure Figure 7: Calculated Calculated Initial UHS Temperature Initial UHS Temperature That Ensures EnsuresUHS UHS Remains RemainsLess LessThan Than107 107OFof Compared Compared to to Proposed ProposedTS TSLimit Limit Operating below the proposed proposedTS TStemperature temperaturelimit limit curve, curve, as asshown shownininTable Table22below, below,willwill ensure ensure the themaximum maximum temperature temperatureof ofthe thecooling coolingwaterwatersupplied suppliedtotothe theplant plantduring duringthetheUHS UHS design designbasis basisevent eventremains remains<_s 107 107 OF, LSCS's current of, LSCS's current safety-related cooling water water design design temperature temperature at at all all times.

times. Therefore, Therefore, there there is is no no impact impact of of this change change on on LSCS LSCS safety safety analyses analyses including including the long term suppression suppressionpool pooltemperature.

temperature.

Page Page 15 15ofof2121

ATTACHMENT 1 ATTACHMENT Evaluation of Evaluation of Proposed Proposed Change Table 2:

Table 2: Analytical Analytical and and Adjusted Adjusted TS TS Temperature Limits for Each of the Event Start Times AAnalyzed I

nalyze d Calculated Calculated Maximum Maximum Calculated Calculated Post-Design Post-Design Proposed Proposed TS Time of Time of Initial UHS 30-Day Initial 30-Day Post Basis Event Basis Maximum Maximum Limit Limit (Max.

Day Day Temperature Temperature Design Design Heatup for Heatup for Initial Initial UHS Initial Initial UHS Design Design That Ensures Basis That Basis Event Event Event Event Temperature Temperature Temperature Temperature -

Basis Basis UHS UHS Remains Maximum Maximum Occurring at - 0.75 of Occurring °F for for Instrument Instrument Conservatism Conservatism Event Event Less Than Less Than UHS UHS Each Time Each Time of of Instrument Instrument Uncertainty Uncertainty in in Proposed Occurs Occurs 107 of 107 OF Temp (OF) °F Day Day (OF)°F Uncertainty Conservatism TS Uncertain ty - Conservatism) TS Limit Limit (OF)

°F 00:00 104.95 104.95 106.96 106.96 2.01 104.20 104.20 103.78 103.78 0.42 03:00 103.14 103.14 106.82 106.82 3.68 102.39 102.39 101.97 101.97 0.42 06:00 102.42 102.42 106.97 106.97 4.55 101.67 101.67 101.25 101.25 0.42 09:00 103.61 107.00 3.39 102.86 102.44 0.42 12:00 105.80 107.00 1.20 105.05 104.00 1.05 15:00 106.97 107.00 0.03 106.22 104.00 2.22 18:00 107.00 107.00 0.00 106.25 104.00 2.25 21:00 107.00 107.00 0.00 106.25 104.00 2.25 24:00 104.95 106.96 2.01 104.20 103.78 0.42 Changing the TS temperature limit for the cooling water supplied to the plant plant from the UHS UHS from from s5 101.25 OF OF totoaatime-of-day-based time-of-day-based variable variable limit limit that that ensures ensures the the UHS remains below the cooling water design temperature will reduce the likelihood likelihood of of the necessity necessity to imposeimpose simultaneous simultaneous and and unnecessary unnecessary transients transientson on two twolarge largereactors.

reactors.

5.0 REGULATORY ANALYSIS

ANALYSIS 5.1 No Significant Significant Hazards Hazards Consideration Consideration In accordance with 10 10 CFR CFR 50.90, "Application for amendment amendment of of license license or or construction construction permit," Exelon Generation Generation Company, LLC LLC (EGC)

(EGG) is requesting requesting aa change change to the the Technical Technical Specifications (TS) (TS) ofof Facility Facility Operating Operating License License Nos. Nos. NPF-11 NPF-11 and and NPF-18 NPF-18 for for LaSalle LaSalle County County Station (LSCS), Units Units 11 and and 2.2. Currently, Currently,Surveillance SurveillanceRequirement Requirement(SR) (SR)3.7.3.1 3.7.3.1 verifies verifiesthe the cooling water temperature supplied water temperature supplied to the plant to the plant from the Ultimate Heat Sink Ultimate Heat Sink (UHS) is (UHS) is

<s 101.25 101.25 OF.

OF. IfIf the temperature temperature of of the the cooling cooling water watersupplied suppliedto tothe theplant plantfrom fromthe theUHS UHSexceeds exceeds 101.25 OF, the UHS OF, the UHS must must be be declared declared inoperable inoperable in in accordance with TS 3.7.3. Additionally, Additionally,TS TS 3.7.3 Required Required Action B.1 B.1 requires requires thatthat both both units units be be placed placed in in Mode Mode 33 within within 12 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, hours, and and Required Required Action Action B.2 8.2 requires requires that that both both units unitsbe beplaced placedininMode Mode44within within36 36hours.

hours.

This This license license amendment amendmentisisbeing beingsought soughtto to modify modify the the acceptance acceptancecriterion criterion for forverification verification ofof cooling cooling water water temperature temperature supplied supplied to to the the plant plant from from thethe core corestandby standby cooling cooling system system (CSCS)

(CSCS) pond.

pond. IfIfthe theindicated indicatedUHS UHStemperature temperatureexceeds exceedsthe thetime-of-day-based time-of-day-basedfunctional functionallimit, limit, TS TS 3.7. 3 Required 3.7.3 Required Actions Actions C.C.11 and and C.2C.2would wouldbe beentered enteredsimultaneously, simultaneously,and andbothbothunits unitswould would be placed in Mode 3 within 12 hours and in Mode be placed in Mode 3 within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in Mode 4 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. 4 within 36 hours.

Page Page 16 16of of2121

ATTACHMENT 1I ATTACHMENT Evaluation of Evaluation of Proposed Proposed Change Change The proposed The proposed change will ensure ensure the the maximum maximum temperature temperature of the cooling water supplied to the plant during plant during the UHS design design basis event remains<_

basis event remains 107 of, s 107 OF,thethecurrent currentsafety-related safety-related cooling cooling water design water design temperature temperature for for LSCS.

LSCS. Therefore, there is no impact of this change on LSCS safety analyses safety analyses including includingthe the long long term term suppression suppressionpool pooltemperature.

temperature. In addition, there are no identified adverse identified adverse influences influences on on risk risk associated with any other Design Basis Basis Accident (DBA) (DBA) and; therefore, and; therefore, aa Probabilistic Probabilistic Risk Analysis Analysis (PRA)(PRA) assessment is not required for this change.

This proposed This proposed change change is supported supported by a LSCS engineering design analysis. analysis.

According to 10 CFR 50.92, According 50.92, "Issuance of amendment," paragraph paragraph (c), (c), aa proposed proposed amendment amendment to an to an operating operating license involves no significant hazards consideration ifif operation operation of of the the facility facility in accordance in accordance with with the the proposed proposed amendment would not:

(1)

(1) Involve aa significant Involve significant increase in in the the probability or consequences of of an accident previously evaluated; or (2) Create the Create the possibility of a new or different kind of accident from any accident previously evaluated; or (3) Involve a significant reduction in aa margin margin of of safety.

safety.

In support support of thisthis determination, determination, an an evaluation of each of of the the three three criteria criteria set set forth forth inin 10 CFR 50. 92 50.92 is provided below:

1. Does the proposed change involve a significant increase increase in in the probability probability or or consequences of an accident previously previously evaluated?

evaluated?

Response: No. No.

The The proposed proposed change change makesmakes no nophysical physical changes changesto to the the plant, plant, nornordoes doesitit alter alter anyanyofof the assumptions assumptions or conditions conditions upon upon whichwhichthethe UHS UHS is designed. These Theseassumptions assumptions and conditions conditions include failure of the cooling cooling lake dike, aa loss loss ofof offsite offsite power, and aa DBA DBA loss of coolant accident accident (LOCA) on one unit unit and aa normal normal shutdown shutdown of ofthe the other otherunit.unit.

Analyzed accidents accidents are are assumed assumed to to be be initiated initiated byby the the failure failure ofofplant plantstructures, structures, systems, or components.

components. An An inoperable inoperable UHS UHS isis not not considered considered as as an an initiator initiator ofof any any analyzed events. The Theincreased increasedallowable allowabletemperatures temperaturescan canimpact impactthe thecommercial commercial capability of of the units, units, however, however, this this isis not not considered considered to to impact impact the the probability probability of of any any of of the the Updated Updated Final Final Safety Analysis Report (UFSAR) postulated events. events. As As such, such, there there isis not aa significant Significant increase increase in in the probability probability of of aa previously previously evaluated evaluated accident.

accident. The The proposed proposed change change will will ensure ensure the maximummaximum temperature temperature of of the the cooling cooling water water supplied supplied to to the the plant plantduring duringthe theUHS UHSdesigndesignbasisbasisevent event remains remains <_s107107OF, OF, the the current currentsafety-related safety-related cooling cooling water water design design temperature temperaturefor forLSCS, LSCS,Units Units11and and2.2.

Therefore, Therefore, there there is is no no impact impact of of this this change change on on LaSalle LaSalle safety safety analyses analyses including including the the consequences consequences of of postulated postulated events. The Theeffects effectsof ofthe theproposed proposed change change on on the the ability ability of of the UHS to assure that a 30-day supply of water is available the UHS to assure that a 30-day supply of water is available considering losses due to considering losses due to evaporation, evaporation, seepage, seepage, and and firefighting firefighting has has been been considered.

considered. Sufficient Sufficientinventory inventory Page Page 17 17ofof21 21

ATTACHMENT 1 ATTACHMENT Evaluation of Proposed Change Evaluation remains available remains available to to permit simultaneous safe shutdown and cooldown of both LSCS LSCS reactor units reactor units and and to to maintain maintain them in a safe shutdown condition for the required 30-day 3~-day period.

period.

Therefore, the proposed activity does not involve a significant increase in the probability Therefore, probability or consequences of an accident previously evaluated.

2.

2. Does the Does the proposed proposed change create the possibility of a new or different kind of accident from any accident previously evaluated?

from Response: No.

This TS amendment request does not propose any changes to the operation, operation, testing, testing, or or maintenance of any safety-related, or otherwise important to safety system beyond operating with a UHS initial temperature limit based on the time of day. The operating TheUHS UHS temperature does not initiate accident accident precursors.

precursors. TheThe structural integrity of the UHS due to the increased water temperature experienced during the design basis basis event event has has evaluated as acceptable been evaluated acceptable under LSCS LSCS Engineering Engineering Change Change (EC)

(EC) 389677.

389677. The impact of increased UHS temperature can affect the commercial operation of of the plant, plant, but the change would not create any accident not considered in the LSCS UFSAR. UFSAR.

All systems that are important important to safety will continue to be be operated operated and and maintained maintained within their design bases.

bases. TheTheproposed proposedchange changewillwillcontinue continuetotoensure ensurethat thatall all associated systems and components are operated reliably reliably within their design capabilities.

The proposed change will ensure the maximum maximum temperature of of the cooling waterwater supplied supplied toto the the plant plantduring duringthetheUHSUHSdesign designbasis event basis event remains remains <_s107107OF, of, the the current current safety-related cooling water design temperature for LSCS, Units 11 and and 2. Therefore, Therefore, there is no impact of of this change on the LSCS LSCS safety safety analyses analyses including including inventory inventory requirements for safety-related safety-related systems systems using using the the UHS UHSas astheir theircooling coolingwater watersupply.

supply.

Since all systems will continue to be be operated within their design capabilities, no no new new failure modes modes are are introduced, introduced, nor nor is is the possibility possibility of of aa new oror different different kind kind of of accident accident created through operation operation in in the the proposed proposed manner.

manner.

3. Does the proposed proposed change change involve involve aa significant significantreduction reduction in a margin margin of of safety?

safety?

Response: No. No.

The proposed proposed change change will ensure ensure the maximummaximum temperature of of the cooling cooling water water supplied supplied to to the theplant plantduring duringthetheUHSUHSdesign designbasis event basis event remains remains <_s107107OF, of, the the current current safety-related cooling water design temperature for LSCS, LSCS, Units Units 11 and and 2.

2. The Theproposed proposed change also also ensures ensures that sufficient sufficient UHSUHS inventory inventory remains remains available available for for the worst worst 30-day 3~-day period period including losses due to evaporation, seepage, and firefighting to support support safe safe shutdown shutdown and and cooldown cooldown of of both both LSCS LSCS units.

units. The Thestructural structuralintegrity integrityofofthetheUHSUHS remains acceptable following the change ensuring the assumptions remains acceptable following the change ensuring the assumptions of both the UHS of both the UHS temperature temperature response response and and inventory inventoryresponse responseanalyses analysesremain remainvalid.

valid.

Page Page 18 18 of of2121

ATTACHMENT11 ATTACHMENT Evaluation of Evaluation of Proposed Proposed Change Therefore, there Therefore, there is no impact of this change on LaSalle safety analyses, analyses, which which ensures ensures that there is no significant reduction in the margin of that of safety of of the the plant.

plant.

Therefore, the Therefore, the proposed change does not involve a significant significant reduction reduction in in aa margin margin of of safety.

Based on Based on the the above above evaluation, evaluation, EGC concludes that the proposed change change doesdoes notnot involve involve aa significant hazards significant hazards consideration consideration under the standards set forth in 10 10 CFR 50.92(c),

50.92(c), "Issuance "Issuance of of Amendment," and, accordingly, a finding of of no significant significant hazards hazards consideration consideration is is justified.

justified.

5.2 Applicable Regulatory Requirements/Criteria The design of the UHS satisfies satisfies the the requirements of 10 CFR 50.36, "Technical Specifications,"

Criterion 3.

paragraph (c)(2)(ii), Criterion 3. This criterion criterion states the following:

(ii) A Technical Specification Limiting Limiting Condition for Operation (TS LCO) of a nuclear reactor must be established for each item item meeting meeting one oneorormore moreofofthe thefollowing following criteria:

criteria:

Criterion 3.

Criterion 3. AA structure, structure, system, system, or or component component that that is is part part ofof the the primary primary success path path and which functions functions or actuates to mitigate a design design basis basis accident accident or or transient transient thatthat either assumes the failure failure of of or or presents presents aachallenge challengeto tothe theintegrity integrityof ofaafission fission product product barrier.

The proposed change does not remove or relocate the CSCS CSCS pondpond temperature temperature limits limits from from TSTS 3.7.3, "Ultimate Heat Sink;" therefore, Criterion 3 of 10 10 CFR 50.36(c)(2)(ii) 50.36(c)(2)(ii) continues continues to be be met.

met.

General Design Criteria 2, "Design bases for protection against natural phenomena," phenomena," and and General General Design Criteria 44, 44, "Cooling water," of Appendix A to 10 10 CFR Part Part 50, 50, "General "General Design Design Criteria for Nuclear Power Plants," provides design considerations for for the the UHS.

UHS. RG RG1.27,1.27, "Ultimate Heat Sink for Nuclear Power Plants," Plants," Revision Revision 1,1, dated dated March March 1974, 1974, provides provides an an acceptable approach for satisfying these criteria. The Thebasis basisprovided providedininRG RG1.27, 1.27,Revision Revision1,1, was employed for the temperature analysis of of the LSCS LSCS UHS.

UHS.

The proposed change will ensure the maximum maximum temperature temperature of of the the cooling cooling water water supplied supplied to to the the plant during the UHS design basis event remains <_ 107 OF, LaSalle's during the UHS design basis event remains s 107 of, LaSalle's current safety-related current safety-related cooling water design temperature. Therefore, Therefore, there thereisisnonoimpact impactofofthis thischange changeon onLaSalle LaSalle safety analyses.

analyses.

6.0 6.0 ENVIRONMENTAL ENVIRONMENTAL EVALUATION EVALUATION EGC has evaluated this proposed operating license amendment amendment consistent consistent withwith the the criteria criteria for for identification ofof licensing licensing andand regulatory regulatory actions actionsrequiring requiringenvironmental environmentalassessmentassessmentinin accordance accordance with 10 10 CFR CFR 51.21, 51.21, "Criteria "Criteria for for and and identification identification ofof licensing licensing and and regulatory regulatory actions actions requiring environmental assessments." EGC EGChas hasdetermined determinedthat thatthis thisproposed proposedchangechangemeetsmeets the the criteria criteria for for aa categorical categorical exclusion exclusion set setforth forthininparagraph paragraph(c)(9)

(c)(9)ofof10 10CFRCFR51.22, 51.22,"Criterion "Criterion Page Page 19 19of of21 21

ATTACHMENT 1I ATTACHMENT Evaluation of Evaluation of Proposed Proposed Change for categorical for categorical exclusion; exclusion; identification of licensing and regulatory actions eligible for categorical exclusion or otherwise exclusion otherwise not requiring requiring environmental review," and and as such, such, has determined that no no irreversible consequences irreversible consequences exist exist in in accordance accordancewith withparagraph paragraph(b) (b)ofof1010CFR CFR 50.92, 50.92, "Issuance of amendment."

of amendment." This This determination determination is is based based on the fact that this change is being proposed as an amendment an amendment to the license issued pursuant to 10 CFR 50, "Domestic Licensing of of Production Production and Utilization and Utilization Facilities," which changes a requirement with respect to installation or use of of aa facility component located within the restricted area, facility area, asas defined defined inin 10 10 CFR CFR 20,20, "Standards for Protection Against Protection Against Radiation,"

Radiation," or which which changes an an inspection or a surveillance requirement, and the and the amendment meets meets the following specific criteria:

(i)

(i) The amendment involves no significant hazards consideration.

As demonstrated in Section 5.1, "No Significant Hazards Consideration," the the proposed proposed change does not involve any any significant significant hazards hazards consideration.

consideration.

(ii)

(ii) There There is is no no significant change change in in the types or significant increase in the amounts of any effluent that that may may be be released offsite.

The proposed change does does notnot result result in an increase in power level, level, does does not not increase increase the production production nor alter the flow path or method of disposal of radioactive waste or or byproducts. The byproducts. The proposed proposed change change willwill ensure ensure thethe maximum maximum temperature temperatureof ofthe thecooling cooling water supplied to the plant during during the the UHS design basis event remains remains s 107107OF,of, LaSalle's current safety-related cooling design temperature. Therefore, cooling water design Therefore,there thereisisno no impact of this this change on LaSalle LaSalle safety safety analyses analysesincluding including the the consequences consequencesofofsuch such events.

Based on the above evaluation, the proposed change will not result in a significant change in the types or significant increase in the amounts of of any effluent effluent released released offsite.

(iii) There is no no significant significantincrease increaseininindividual individualor orcumulative cumulativeoccupational occupationalradiation radiation exposure.

There is is no net increase in individual or cumulative occupational radiation radiation exposure exposure duedue to the proposed proposed change. The Theproposed proposed action action will will not not change change the the level level of of controls controls oror methodology used for processing processing of of radioactive effluents or handling of of solid radioactive radioactive waste, nornor will will the proposed proposed action action result result in in any any change change in in the the normal normal radiation radiation levels levels within within the the plant.

plant.

Based on on the the above above information, information, there there will will be beno noincrease increaseininindividual individualororcumulative cumulative occupational occupational radiation radiation exposure exposureresulting resulting from from this thischange.

change.

Page Page20 20ofof21 21

ATTACHMENT 1I ATTACHMENT Evaluation of Proposed Change Evaluation

7.0 REFERENCES

1. Letter from

1. from S.

S. P.P. Sands (U.

(U. S.

S. NRC) to C. M. Crane (EGC),

(EGC), "LaSalle "LaSalle County County Station, Station, Units 1 and Units and 22 -Issuance

- Issuance of of Amendments Re: Re: Technical Technical Specification Specification 3.7.3 3.7.3 Ultimate Ultimate Heat Sink Request for Processing on an Emergency Basis (TAC Nos. MD6014 and and 2, 2007 MD6015)," dated August 2,2007

2. Design Analysis L-002457, "LaSalle County Station Ultimate Heat

2. HeatSink SinkAnalysis,"

Analysis,"

Revision 7

3. EC 389677, "Evaluate

3. "Evaluate UHS for 107 DegF Temperature," Revision Revision 00 Page 21 21 of of 21 21

ATTACHMENT 2 LASALLE COUNTY STATION UNITS 11 and 2 Docket Nos. 50-373 and 50-374 50-374 License Nos.

Nos. NPF-11 and and NPF-18 Markup of Proposed Technical Specifications Specifications Page Page Changes Changes REVISED TS PAGE 3.7.3-1 3.7.3-2

UHS UHS 3.7.3 3.7.3 3.7 3.7 PLANT PLANT SYSTEMS SYSTEMS 3.7.3 3.7.3 Ultimate Ultimate Heat Heat Sink (UHS)

(UHS)

LCO LCO 3.7.3 3.7.3 The The Core Core Standby Standby Cooling System System (CSCS)

(CSCS) pond pond shall shall be be OPERABLE.

OPERABLE.

APPLICABILITY:

APPLICABILITY: MODES MODES 1,1, 2, and 3.

2, and 3.

ACTIONS ACTIONS CONDITION CONDITION REQUIRED ACTION REQUIRED ACTION COMPLETION TIME COMPLETION TIME A.

A. CSCS CSCS pond inoperable pond inoperable A.l A.1 Restore CSCS pond Restore CSCS pond to to 90 days 90 days due to sediment due to sediment OPERABLE status.

OPERABLE status.

deposition deposition or or bottom bottom elevation not within elevation not within i mit .

1limit.

1'-:s.. Required Action and Required Action and :S.1

-R .1 Be MODE 3.

in MODE Be in 3. 12 hours 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> A~

associated Completion associated Completion l Time of Time OR OR of Condition met.

not met.

not CSCS pond CSCS Condition AA pond inoperable inoperable

S.2 Be in Be in MODE MODE 4.4. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> 36 hours for reasons other for reasons other than than Condition A.

Condition A. C B.

B. Cooling water Cooling water B.l Perform Perform Si< 3.7.3.I. Once per Once per hour nour temperature supplied temperature supplied L to the to plant from tne plant from the the CSCS pond CSCS pond-:t

~ 101°F.

101°F-LaSalle 11 and LaSalle and 22 3.7.3-1 3.7.3-1 Amendment No.

Amendment No. 147,1 147/133 13 3

UHS UHS 3.7.3 3.7.3 SURVEILLANCE REQUIREMENTS SURVEILLANCE REQUIREMENTS SURVEILLANCE SURVEILLANCE FREQUENCY FREQUENCY SR SR 3.7.3.1 3.7.3.1 Verify Verify coolingcooling waterwater temperature supplied supplied In In accordance accordance l to to the the plant plant fromfrom thethe CSCSCSCS pond pond is is with with the the

<-101.2 101. 25°F.50F.

~within Surveillance Surveillance Frequency Frequency

(

D within the the limits limits of of Figure Figure 3.7.3-1 I Control Control Program Program SR SR 3.7.3.2 3.7.3.2 Verify Verify sediment sediment level level is::;1.5ft is < _ 1.5 ft in in the the In In accordance accordance intake flume and the CSCS pond.

intake flume and the CSCS pond. with with the the Surveillance Surveillance Frequency Frequency Control Control Program Program

~

J V

SR SR 3.7.3.3 3.7.3.3 Verify CSCS

686.5 ft.

CSCS pondpond bottom bottom elevation elevation is is In In accordance with accordance with the the Surveillance Surveillance Frequency Frequency Control Control Program Program

"(IJ

~"

I 105.00 105.00 I

i 104.50 104.50 I

Unacceptable Unacceptable Operation Operation (104. 00) . (104.00)

(104.00) (104.00)

(104.00) (104.00) 104.00 104.00 1\(103.78)

(103.78)

/ (103.78)

(103.78)

\

2~ 103.50 103.50 OJ

~ 103.00 103.00

/

F

'"OJ Co E

102.50

(!!. 102.50 \ I I /(102.44)

(102.44) I I

Acceptable Acceptable Operation Operation

\ (101.97)

(101.97) 102.00 102.00 101.50 101.50 -- ~ -- /  ;

101.00 101.00 .

00:00 00:00 I

03:00 03:00 06:00 (101.25) .

V(101.25) 06:00 09:00 09:00 12 :00 12:00 Time of Time of Day Day 15:00 15:00 18:00 18:00 21:00 21:00 j

24:00 24:00 Figure 3.7.3-1 Figure 3.7.3-1 (page (page 11 of of 1)1)

Temperature of Temperature of Cooling Cooling Water Water Supplied Supplied to to the the Plant Plant from from the the CSCS Pond CSCS Pond Versus Versus TimeTime of of DayDay Requirements Requirements LaSalle 11and LaSalle and 22 3.7.3-2 3.7.3 -2 Amendment No.No.

Amendment 200/187 2-^,'-

ATTACHMENT ATTACHMENT 3 3 LASALLE COUNTY STATION STATION UNITS 11 and and 2 Docket Nos. 50-373 and 50-374 License Nos. NPF-11 NPF-11 and NPF-18 Markupof Markup ofProposed ProposedTechnical TechnicalSpecifications Specifications Bases Bases Page PageChanges Changes--For ForInformation Information Only REVISED TS BASESBASES PAGES PAGES BB 3.7.3-2 3.7.3-2 BB 3.7.3-3 BB 3.7.3-4 BB 3.7.3-5 3.7.3-5 TS Bases Bases Inserts Inserts A A and and BB

UHS UHS B 3.7.3 B 3.7.3 BASES BASES APPLICABLE APPLICABLE The The UHS UHS post-accident post-accident temperature temperature is is based based onon heat heat removal removal SAFETY ANALYSES ANALYSES calculations calculations (Ref. (Ref. 5) 5) that that analyze analyze for for aa maximum maximum allowable allowable (continued)

(continued) post-accident inlet post-accident inlet cooling cooling water water temperature temperature of of --84°F.

+/-&4°F. To To account for for the the worst- worst-casecase scenario and to apply and to apply ~ ~

107 maximum initial maximum initial conservatism, conservatism, th th hest-aced post accident CSCS CSCSpondpondcooling wate~

cooling water i 7:"n;-1e~ti:J:t:-::e=m-=-p-=-e 7

1 . - - - - - - - - --inlet temperature' 7:"ra~t:-:-u-::r-::7 0 flO 4°° F con sis t s 0 f the esc S po nd TS

. temperature maximum of lOl.25°F ° plus 2°F ° Ffor far transient heatheat reducedby~

liisS reduced by ---;7 up pl us 0.75°F 0.75°Fto to account account for instrument uncertainty for instrument uncertainty (Ref.

(Ref. 6) 6).

~Insert Insert TS Bases Insert A Bases Insert A I There There are are four four temperaturetemperature measuringmeasuring devices devices located located in in the the Circulating Circulating Water Water inlet inlet thermowells thermowells (i.e., (i.e., two two per per unit).

unit).

The The 0.75°F 0.75°F allowance allowance bounds bounds thethe instrument instrument uncertainty uncertainty associated associated with any any combination combination of of operable operable temperature temperature measurement devices. devices.

within within the The The UHS UHS satisfies satisfies Criterion Criterion 33 of of 10 10 CFR CFR 50.36(c)(2)(ii).

50.36(c)(2)(ii). Acceptable jAcceptable Operation

---

~region region LCO OPERABILITY OPERABILITY of of the the UHS UHS is is based based on on aa maximum maximum water defined defined by by temperature being being supplied supplied to to the the plant-e4 plant ~~~~~-a § nd a Figure Figure minimum pond pond water water level level atat oror above above elevation elevation 690690 ft mean 3.7.3-1 3.7.3-1 sea level. level. In In addition, addition, to to ensure ensure the the volume volume ofof water water available available in in the the CSCS CSCS pond pond is is sufficient sufficient to to maintain maintain adequate long term cooling, sediment deposition (in adequate long term cooling, sediment deposition (in the the intake intake flume flume and and in in the the pond) pond) must must be be <_

~ 1.5 1.5 ft and CSCS ft and CSCS pond pond bottom elevation bottom elevation must must bebe<_~ 686.5 686.5 ft. ft.

APPLICABI LITY APPLICABILITY In In MODES MODES 1, 1, 2, 2, and and 3, 3, the the UHSUHS isis required required to to be be OPERABLE OPERABLE to to support support OPERABILITY OPERABILITY of of the the equipment equipment serviced serviced by by the the UHS, UHS, and and is is required required to to be be OPERABLE OPERABLE in in these these MODES.

MODES.

In In MODES MODES 4 and and 5, 5, the the OPERABILITY OPERABILITY requirements requirements of of the the UHS UHS are are determined determined by by the the systems systems it it supports. Therefore, the supports. Therefore, the requirements requirements are are not not the the same same forfor allall facets facets ofof operation operation in in MODES 4 and 5. The LCOs of the systems supported by the UHS MODES 4 and 5. The LCOs of the systems supported by the UHS will will govern govern UHS UHS OPERABILITY OPERABILITY requirements requirements in in MODES MODES 44 and and 5.

5.

(continued)

LaSalle LaSalle 11 andand 22 B 3.7.3-22 B 3.7.3- Revision 9-

UHS UHS B 3.7.3 B 3.7.3 BASES BASES (continued)

(continued)

ACTIONS ACTIONS A_1 If If the the CSCS CSCS pond pond is is inoperable, inoperable, due due toto sediment sediment deposition deposition

>> 1.5 ft (in 1.5 ft (in the the intake intake flume, CSCS pond, flume, CSCS pond, or or both) both) or or the the pond pond bottom bottom elevation>

elevation > 686.5 686.5 ft,ft, action action must must be be taken taken to to restore restore the the inoperable inoperable UHS UHS toto anan OPERABLE status within OPERABLE status within 90 90 days.

days. The 90 day Completion Time is reasonable The 90 day Completion Time is reasonable based on the based on the low low probability probability of of an an accident accident occurring occurring during during thatthat time, time, historical historical data data corroborating the the low low probability probability of of continued continued degradation degradation (i.e., (i .e., further further excessive excessive sediment sediment deposition deposition or or pond bottom elevation pond bottom elevation changes) changes) of of the the CSCS CSCS pond pond during during that time, and that time, and the the time time required required to to complete complete the the Iinsert Insert TS TS Bases Insert Insert B Required B LRequi red Action.

Action.

I ~ ,......../Cl in in the the Unacceptable

~ 13.1 and 9.2 It-_ S Operation region defined S.l and B.2 by by Figure 3.7.3-1 Figure 3.7.3-1 If If the the CSCS CSCS pond pond cannot cannot be be restored restored to to OPERABLE OPERABLE statusstatus within the associated within the associated Completion Completion Time,Time, or or the the CSCS CSCS pondpond is is determined inoperable for determined inoperable for reasons reasons other other than than Condition Condition AA (e.g.,

(e.g., inoperable inoperable due due toto the the temperature temperature of of the the cooling cooling water supplied water supplied to to the the plant plant from from thethe CSCS CSCS pond pond >> 1101.25°F,25°F corrected for sediment level and time of day), ), the unit must the unit must be placed be placed in in a a MODE MODE inin which which the the LCOLCO does does notnot apply.

apply. To To achieve this achieve this status,status, the the unit unit must must be be placed placed in in atat least least MODE 33 within MODE within 12 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> hours and and in in MODE MODE 44 within within 36 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

hours. The The allowed Completion allowed Completion Times Times areare reasonable, reasonable, based based on on operating operating experience, to experience, to reach reach the the required required unit unit conditions conditions from from full full power conditions power conditions in in an an orderly orderly manner manner and and without without challenging unit challenging unit systems.

systems.

SURVEI LLANCE SURVEILLANCE SR SR 3.7.3.1 3.7.3.1 REQUIREMENTS REQUIREMENTS Verification of Verification of the the temperature temperature of of the the water water supplied supplied to to the the plant from plant from the the CSCS CSCS pond pond ensures ensures thatthat thethe heat heat removal removal capabilities of capabilities of the the RHRSW RHRSW System System andand DGCW DGCW System System are are within within the assumptions the assumptions of of the the DBA DBA analysis.

analysis. To To ensure ensure thatthat the the maximum post maximum post-accident temperature of

- accident temperature of water water supplied supplied to to the the 107 plantisisnotnot plant exceeded exceeded (i . e.(i.e.

,,,. I-0 4°F determined OF determ, 'n Ref.

ne d,,_in 4),

Ref. 4 )

the temperature the temperature during during normal`

normal plant plant operation operation must must be be evaluated eva luated within within the the limas limits (Ref. 3).

101. 25°F (Ref.

< 101.25°F 3). Thi sis This is toto account account for for the the CSCS CSCS pond pond I described described byby design requirement design requirement that that it it provide provide adequate adequate cooling cooling waterwater supply to the plant (i.e .* temperature < ~) f~~:n:i:a:e:}

Figure 3.7.3-1. supply to the plant (i.e., temperature <_ -°F) for 30 days 3.7.3-1.

(continued) 07 LaSalle 11 and LaSalle and 22 BB 3.7.3-3 3.7.3-3 Revision2-9 Revision 9-

UHS UHS BB 3.7.3 3.7.3 BASES BASES SURVEI LLANCE SURVEILLANCE SR 3.7.3.1 (continued)

(continued)

REQUIREMENTS (continued) without without makeup, makeup, while taking into while taking into account account solar solar heat heat loads loads and and plant plant decay heat during decay heat during the the worst historical weather worst historical weather conditions. In In addition, addition, since since the lake temperature the lake temperature follows follows a diurnal diurnal cycle (it heats cycle (it heats up up during during the the day day and and cools cools off off atat night),

night), thethe allowable initial UHS allowable initial UHS temperature temperature varies varies withwith the time of the time of day.

day. TheThe allowable initial UHS allowable initial UHS temperatures, temperatures, based on the actual sediment level and the time of based on the actual sediment level and the time of day day have have been determined by analysis (Ref. 5). The been determined by analysis (Ref. 5). limiting initial The limiting initial S

UHS UHS temperaturE1 temperatur, of oS0F l02.3°F determinedininthis determined this analysis analysis ensure-sthe ensure~ themaximum maximum post-accident post-accident temperature temperature of of +/-B40 4-840is is not exceeded. These not exceeded. These temperatures temperatures are are analytical analytical limits limits that that 107 07 do not include do not include instrument instrument uncertainty uncertainty or or additional additional margin.

margin.

For example, if the lake temperature uncertainty and additional margin are determined Frfllneddto tebebeO.5°F, 0.50F, the thelimiting limiting initial UHS temperature becomes lOl.8°F. ~~imiting T-i-s imiting IThese initial temperatur~remain~

initial temperature bounded by remain& bounded by the SR 3.7.3.1 liml~

the SR limi described by at ~ 10] .?coF. The Surveillance Frequency The Surveillance Frequency is is controlled controlled I under under the the Surveillance Frequency Control Surveillance Frequency Control Program.

Program. s Figure 3.7.3-1.

Figure SR 3.7.3.2 This This SRSR ensures ensures adequate adequate long long term term (30 days) cooling (30 days) cooling can can bebe maintained, maintained, by by verifying verifying thethe sediment sediment level level in in the the intake intake flume and flume and the the CSCS CSCS pond pond is is <_ 1.5 feet.

~ 1.5 Sediment level feet. Sediment level is is determined by determined by aa series series of of sounding sounding cross-sections cross-sections compared compared to as-built to as-built soundings.

soundings. The The Surveillance Surveillance Frequency Frequency is is controlled under controlled under the the Surveillance Surveillance Frequency Frequency Control Control Program.

Program.

SR SR 3.7.3.3 3.7.3.3 This SR This SR ensures ensures adequate adequate long long term term (30 days) cooling (30 days) cooling can can bebe maintained, by maintained, by verifying verifying thethe CSCS CSCS pond pond bottom bottom elevation elevation is is

<_ 686.5 feet.

~ 686.5 feet. TheThe Surveillance Surveillance Frequency Frequency is is controlled controlled under the under the Surveillance Surveillance Frequency Frequency Control Control Program.

Program.

(continued)

(continued)

LaSalle 11 and LaSalle and 22 BB 3.7.3-4 3.7.3-4 Revision ^4 Revision .s+

UHS UHS B 3.7.3 B 3.7.3 BASES BASES (continued)

(continued)

REFERENCES 1. Regulatory Guide 1.27, Regulatory Guide 1.27,Revision Revision-2-, January 19 2.

2. UFSAR, Section UFSAR, Section 9.2.1.

9.2.1.

March 1974.

3.

3. UFSAR, Section 9.2.6.

UFSAR, Section 9.2.6.

EC 388666, Rev.

Rev. 0, <<

"Revise Design 4. EC 334017, EG 334917, Rev.

Rev. 0, 0, "Increased Cooling Water Analyses Analyses for for UHS UHS Temperature Evaluation to a New Maximum Allowable of 104°F."

194°F."

~salle Temperature of 107F."

1OTF. II L-002457, Rev. , 5. 5. L-002457, Rev.

"LaSalle County Station County Station Ultimate Ultimate Heat Analysis."

Sink Analysis."

Heat Sink 6.

6. L-003230, Rev. 1, L-003230, Rev. 1, "CW "CW Inlet Inlet Temperature Temperature Uncertainty Uncertainty Analysis."

Analysis."

LaSalle 11 and and 22 B 3.7.3-5 B 3.7.3-5 Revision Revision 9-24

TS Bases Insert A and and a minimum additional additional margin margin of 0.42°F, O.42°F, toto ensure ensure the the cooling cooling water water temperature supplied to temperature supplied to the the plant plant from from the the CSCS CSCS pond pond remains remains ~5 107°F at at all all times times TS Bases Insert B TS B.1 With With water water temperature temperature of of the the UHS UHS greater greater than than 101°F, 101°F, Required Required Action B.1 is Action B.1 is provided provided toto monitor monitor the the water water temperature temperature of of the the UHS UHS and and verify the temperature verify the temperature isis within within the the limits limits of of Figure Figure 3.7.3-1 more frequently.

3.7.3-1 more frequently. The onceonce per per hour hour Completion Completion Time Time takes takes into into consideration consideration UHS UHS temperature temperature variations variations and and the the increased increased monitoring frequency needed monitoring frequency needed to to ensure ensure design design basis basis temperature temperature limit of 107 limit of 107°F

° F is is not exceeded in not exceeded in this this condition.

condition. If If the water the water temperature temperature of of the the UHS UHS exceeds exceeds the the limits limits ofof Figure Figure 3.7.3-1, 3.7.3-1, Condition Condition C C must must be be entered entered immediately.

immediately.

ATTACHMENT 4 LASALLE COUNTY STATION UNITS 11 and 2 Docket Nos. 50-373 and 50-374 50-374 License Nos. NPF-11 NPF-11 and NPF-18 Revised Technical Specifications Pages REVISED TS PAGES 3.7.3-1 3.7.3-2 NEW TS PAGE NEWTS 3.7.3-3

UHS UHS 3.7.3 3.7.3 3.7 3.7 PLANT SYSTEMS PLANT SYSTEMS 3.7.3 3.7.3 Ultimate Heat Sink Ultimate Heat Sink (UHS)

(UHS)

LCO 3.7.3 The The Core Core Standby Cooling Cooling System System (CSCS)

(CSCS) pond pond shall shall be be OPERABLE.

APPLICABILITY: MODES 1,1, 2, 2, and and 3.

3.

ACTIONS CONDITION CONDITION REQU I RED ACTION REQUIRED ACTI ON COMPLETION TIME COMPLETION TIME A. CSCS pond pond inoperable A.1 Restore Restore CSCS pond pond to to 90 days 90 days due toto sediment sediment OPERABLE status.

status.

deposition or or bottom bottom elevation not within elevation not within i mit .

1limit.

B. Cooling water water B.1 Perform SRSR 3.7.3.l.

3.7.3.1. Once per hour Once per hour temperature supplied to the plant to the plant from from the the CSCS pond pond >_ 101°F.

~ 101°F.

C.

C. Required Action Action and C.1 Be in MODE Be MODE 3. 12 hours 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> associated Completion associated Completion Time of Time of Condition Condition AA AND AND not met.

not met.

C.2 C.2 Be in Be in MODE MODE 4.

4. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> 36 hours OR OR pond inoperable CSCS pond CSCS inoperable for reasons for reasons other other than than Condition A.

Condition A.

LaSalle 11 and LaSalle and 22 3.7.3-1 3.7.3 -1 Amendment No.

Amendment No.

UHS UHS 3.7.3 3.7.3 SURVEILLANCE SURVEILLANCE REQUIREMENTS REQUIREMENTS SURVEILLANCE SURVEILLANCE FREQUENCY FREQUENCY SR SR 3.7.3.1 3.7.3.1 Verify Verify cooling cooling water temperature supplied temperature supplied In In accordance accordance to to the plant plant from the CSCS from the CSCS pond pond is is within within with the with the the the limits limits of of Figure Figure 3.7.3-1.

3.7.3-1. Surveillance Surveillance Frequency Frequency Control Control Program Program SR SR 3.7.3.2 3.7.3.2 Verify sediment level is is ~< 1.5 ft

_ 1.5 ft in in the the In In accordance accordance intake flume and the CSCS pond.

intake flume and the CSCS pond. with the with the Surveillance Surveillance Frequency Frequency Control Control Program Program SR SR 3.7.3.3 3.7.3.3 Verify CSCS pond bott CSCS pond bottom elevation is om elevation is In In accordance accordance

~ 686.5 ft. with the with the Surveillance Surveillance Frequency Frequency Control Control Program Program LaSalle 11 and LaSalle and 22 3.7.3-2 3.7.3 -2 Amendment No.

Amendment No.

UHS 3.7.3 105.00,---------...

105.00 -.....--.-.-..,..-**.--------.*.-..*.-.---...----...--......- ..----------.-.-.- ....,---...-.-.. --,

104.50 104.50 - r - - - - i - - -

Unacceptable Unacceptable Operation Operation (104.00)  ! (104.00) i (104.00) I (104.00) 104.00 104.00 -- . -

(103.78) (103.78)

~ 103.50~---i-----~-------~-+----~-----~-----,_--__4 103.50 OJ

~ 103.00 -r--4c-------------,,---------l.--/-----r-------l.------;------l------J OJ 0-s; Acceptable Acceptable

~ 102.50 i--------\----l..-..- . - - - ' - - - - - - - - - J ' - - - - - - - - ' - - - - . . . . . ; . . -

Operation Operation (102.44)

(101.97) 102.00+1---~------;--_7'-------------.-----------1 102.00 101. 50 101.50 +------r----~-~_+-----------r-------.---;---------l (10 1.25) 101.00 101.00+-----r---~----~---_+---__;_----~----~--__4 00:00 00:00 03:00 03:00 06:00 06:00 09:00 12:00 15:00 18:00 21 :00 21:00 24:00 24:00 Time of Time of DayDay Figure 3.7.3-1 Figure 3.7.3-1 (page (page 11 of of 1) 1)

Temperature of Temperature of Cooling Cooling Water Water Supplied Supplied to to the the Plant Plant from from the the CSCS Pond CSCS Pond Versus Versus Time Time of of Day Day Requirements Requirements LaSalle 11 and LaSalle and 22 3.7.3-3 3.7.3-3 Amendment No.

Amendment No.

ATTACHMENT 5 LASALLE COUNTY STATION STATION UNITS 11 and and 2 Docket Nos. 50-373 and and 50-374 50-374 License Nos. NPF-11 NPF-11 and NPF-18 A Discussion of of the LaSalle LaSalle County County Station Station Core Core Standby Standby Cooling Cooling System -Equipment System-Equipment Cooling Water System (CSCS-ECWS) Heat Transfer Transfer Capabilities Capabilitiesatat107 107OF of

LaSalle County LaSalle County Station Station Request for a License Amendment to Technical Specification Specification 3.7.3, 3.7.3, "Ultimate Heat Sink" - Attachment 5 A Discussion A Discussion of the LaSalle County Station Core Standby Cooling Cooling System System-Equipment

-Equipment Cooling Water System (CSCS-ECWS) Heat Transfer Capabilities Capabilities at at107 107OF of Page 1 of4 Page of 4 The LaSalle County Station (LSCS) Ultimate Heat Sink (UHS) provides cooling The cooling water water to to the the safety related heat loads via the core standby cooling system-equipment cooling system-equipment cooling water system water system (CSCS-ECWS). The (CSCS-ECWS). The heat heat loads loads inin the theCSCS-ECWS CSCS-ECWSinclude includethe theresidual residualheat heatremoval removal(RHR) (RHR) exchangers, diesel-generator jacket water coolers, the emergency core cooling heat exchangers, cooling system system (ECCS) pump (ECCS) pump cubicle cubicle coolers, coolers, RHR pump seal coolers, and low-pressure core spray (LPCS) (LPCS) pump motor cooling pump cooling coils.

coils. This This UHS UHS also also provides provides a source of emergency makeup water for the fuel pools.

fuel pools. The The discussion discussion below below demonstrates demonstrates that that the the components components in in the the CSCS-ECWS CSCS-ECWS will will continue to perform their respective design functions with UHS water temperatures temperatures as as high high asas oF.

107 OF.

107 An evaluation of the net positive suction head head (NPSH)

(NPSH) for the the CSCS-ECWS CSCS-ECWS pumps pumps was was completed. The completed. The evaluation evaluation accounted accounted for forthe themaximum maximumcoolingcoolingwater watertemperature temperature(i.e., (i.e.,107107°F)OF) and the minimum UHS water level, which accounts for 30-day evaporative evaporative losses losses taken taken fromfrom , Reference 2. 2. The The evaluation evaluation showed showed thatthat the the available available NPSHNPSH for for the the CSCS-ECWS pumps CSCS-ECWS pumps exceeds exceeds the the required required NPSH NPSH withwith margin.

margin. ItIt should be noted that additional margin is available based on the fact that when the UHS is is atat the lowest lowest level level (i.e., after 30 days), the temperature of (Le., of the the water water hashas been been shown shownto tobe bebelow below107 107OF. of.

RHR Heat Exchangers The RHR heat exchangers are the principal principal heat-load heat-load of of the the Core Core Standby Standby CoolingCooling System System --

Cooling Water System (CSCS-ECWS). They Equipment Cooling They are areused usedtotoreject rejectheat heatfrom from containment to to the the UHS.

UHS. There There areare two two shell shell and and tube tube RHR RHR heat heat exchangers exchangers for for each unit unit at at LSCS. The LSCS. The minimum minimum required required design design heat heatrejection rejection capabilities capabilitiesfor forthe thesafety safetyrelated relatedfunction functionofof each RHR heat exchanger is approximately 165.6 165.6 E06E06 British British thermal units units perper hour hour (Btu/hr).

(Btu/hr).

Currently, none of the RHR heat exchangers have any materiel Currently, materiel condition issues issues thatthat would would impair their ability to support an inlet cooling water temperature of 107 OF. of. AnAn evaluation of heat exchanger heat removal capability was completed using the design bases bases minimum minimum cooling cooling water and process fluid (i.e.,

(Le., water) flow rates, the design fouling factor, the maximum maximum tube tube plugging allowance, and the maximum process fluid and cooling water water temperatures. This This evaluation found thatthat with with an an inlet inlet cooling cooling water watertemperature temperatureofof107 107OF of and the the aforementioned aforementioned parameters, the heat rejection capability of the RHR heat exchangers was approximately approximately 166.5 166.5 E06 Btu/hr.

Btu/hr. The The heat heattransfer transfercapability capabilityand and fouling fouling factor factorof ofthe theRHR RHRheat heatexchangers exchangersisis verified on a regular basis using field data (e.g., water flow rates, water temperatures) input input into into commercially available software. The testing used to gather the data is The testing used to gather the data is completed in completed in accordance with the LSCS Generic Letter 89-13, "Service Water System Problems Problems Affecting Safety-Related Equipment," program. Actual Actualhistorical historicalperformance performancedemonstrates demonstratesthat thatmargin margin exists. Based on the evaluation with elevated elevated temperatures temperatures and and verification verificationofofactualactual performance, each of the RHR heat exchangers has margin to perform its safety function with aa cooling water water inlet inlet temperature temperature of of 107 107 OF.

oF. More More information information regarding regarding the theRHRRHRheat heat exchangers is is shown shown inin Table Table A5-1 A5-1 below.

below.

Diesel Generator Generator Jacket Jacket Water Water Coolers Coolers The Diesel Generator Jacket Water Coolers have the next largest heat-load of of the CSCS-CSCS-ECWS following the RHR heat exchangers. The Thefunction function ofofthethediesel dieselgenerator generatorjacket jacketwater water

LaSalle County Station Request for a License License Amendment Amendment to to Technical Technical Specification Specification 3.7.3, "Ultimate Heat Sink" - Attachment 5 A Discussion of of the LaSalle LaSalle County County Station Station Core Core Standby Standby Cooling Cooling System-Equipment System-Equipment Cooling Water Water System (CSCS -ECWS) Heat System (CSCS-ECWS) Heat Transfer TransferCapabilities Capabilitiesatat107 107OF of Page 2 of of44 coolers is to transfer the heat rejected from the engine engine water water jacket, the the lube lube oiloil cooler, cooler, and and the the engine air aftercooler to to the UHS.

UHS. There There are are five five shell shell and and tube tube diesel diesel generator generator jacket water coolers to support the five diesel diesel generators at at LSCS.

LSCS. The The minimum minimum required required design design heat heat rejection capability for the diesel generator jacket water water coolers coolers are are 7.8 7.8 E06 E06 Btu/hr Btu/hr (i.e.,

(Le., 100%

100%

DG capacity) for the high pressure core spray (HPCS) (HPCS) diesel diesel generators, generators, and and 8.68.6 E06 E06 Btu/hr Btu/hr (i.e., 110% DG capacity) for the remaining diesel generators. Currently, (i.e., Currently,nonenoneofofthe thediesel diesel generator jacket water coolers have have any any materiel condition issues that would impair materiel condition impair their their ability ability to support an inlet cooling water water temperature temperature of of 107 107 OF.

of. An evaluation of of cooler cooler capacity capacity was was completed using the design bases minimum cooling water and and process process fluid fluid (i.e.,

(Le., water) water) flowflow rates, the design fouling factor, the maximum tube plugging rates, plugging allowance, allowance, and and the the maximum maximum fluid and process fluid and cooling cooling water temperatures.

temperatures. The The evaluation evaluation determined determined that with an inlet cooling water temperature temperature of of 107 107OF and the of and the aforementioned parameters, the heat heat rejection rejection capability is approximately 7.92 E06 E06 Btu/hr Btu/hr for the HPCSHPCS diesel generator jacket water coolers coolers and is approximately 8.73 E06 Btu/hr for all all other diesel diesel generator generator jacket jacket water water coolers.

coolers. These capacities exceed the required required heat rejection rejection capability capability with with margin.

margin. TheThe heat heat transfer capability and fouling factor of of the diesel generator generator coolers coolers is is verified on on aa regular regular basis using field data (e.g., water flow rates,rates, water water temperatures) input input intointo commercially commercially available available software.

software.

The testing used to gather the data data isis completed completed in in accordance accordance with with the the LSCS LSCS Generic Generic LetterLetter 89-13 program.

program. Historical Historical performance performance demonstrates demonstrates that that margin margin exists.

exists. Based Basedon onthe the evaluation with elevated temperatures and and verification verification of of actual actual performance, performance, each each of of the the diesel diesel generator jacket water coolers has has margin margin to perform perform itsits safety safety function with aa coolingcooling waterwater inlet temperature of 107 OF. of. More information regarding the Diesel Generator Jacket Water Coolers is shown in in Table Table A5-1A5-1 below.

below.

RHR Pump Seal Coolers Coolers The purpose of the RHR pump pump seal seal coolers coolers is is to maintain maintain the RHR RHR pump pump seal seal cavity cavity temperatures below 250 OF. of. The RHR pump seal coolers are helical coil type coolers. There There are no known materiel condition issues on the RHR RHR pump pump seal seal coolers coolers ofof either either LSCSLSCS unit unit that that would impair impair their their ability ability to to support support aa cooling cooling water waterinlet inlettemperature temperatureofof107 107OF. of. TheThecooling cooling capability of of the RHR RHR pump pump seal seal coolers coolers isis verified verified on onaaregular regularbasis basisby byverifying verifyingcritical critical parameters (i.e.,

(Le., water flow rates) remain above minimum design values. The Thetesting testingused usedto to verify the critical parameters is completed in accordance with the LSCS LSCS Generic Generic Letter Letter 89-13 89-13 program. Historical program. Historical performance performance demonstrates demonstrates that margin exists. The TheRHR RHR pumppump seal seal coolers coolers have margin between the actual flow (i.e., (Le., 22 gpm on average) and the minimum required flow of 5 gpm at 107107 OF.

of. An evaluation of of the the RHR RHR pumppump seal seal coolers coolers showed showedthat thatmargin marginexists existstoto perform their safety functions functions withwith aa cooling cooling water water temperature temperatureof of107 107OFof at the inlet of the coolers.

LPCS Pump Motor coolers The purpose of the low pressure core spray (LPCS) pump motor cooler is to maintain the LPCS LPCS pump motor bearing temperatures temperatures below below 200200 OF.of. The The LPCS LPCS motormotorcoolers coolers consist consistof ofaasingle single copper coil submerged in an oil bath. Each Each cooler coolerhashasmargin marginbetween betweenthe theactual actualflowflow (i.e., approximately 5 gpm) and (Le., and the the minimum minimum required required flow flow of of33gpm gpm atat107 107OF. of. There There are arenono cooler materiel condition issues that would impair their ability to support an increase issues that would impair their ability to support an increase in inlet in inlet

LaSalle County LaSalle County Station Station Request for a License Amendment to Technical Specification Specification 3.7.3, 3.7.3, "Ultimate Heat Sink" - Attachment 5 A Discussion of the LaSalle County Station Core Standby Standby Cooling Cooling System -Equipment System-Equipment Cooling Water System (CSCS-ECWS) Heat Transfer Capabilities Capabilities at at107 107OF of 3 of 4 Page 30f4 cooling water cooling water temperature temperature to to 107 OF. The cooling of. The cooling capability of the LPCS pump motor coolers is verified on a regular basis by verifying verifying critical parameters (water flow rates) remain above above minimum design minimum design values.

values. The The testing testing used used toto verify verifythe thecritical criticalparameters parametersisiscompleted completedinin accordance with accordance with the the LSCS LSCS Generic Generic Letter Letter 89-13 89-13 program.

program. Actual historical performance demonstrates that margin exists. The coolers have margin between the actual actual flow flow and and the the minimum required minimum required flow flow of 3 gpm.gpm. AnAn evaluation evaluation of ofthe theLPCS LPCSmotormotorcoolers coolersshowed showedthat thatmargin margin exists toto perform perform their safety functions with elevated cooling water temperatures (i.e., (Le., 107 107 °F)

OF) to to the inlet of the coolers.

ECCS Pump Cubicle Coolers The purpose of the ECCS EGCS pump cubicle coolers is is to maintain maintain the the pump pump cubicles cubicles atat acceptable acceptable temperatures to to support support the the environmental environmental qualification qualification of of the the equipment equipment in in the the cubicle.

cubicle. The cubicle coolers are finnedfinned tube, tube, air-to-water coolers. There Thereare areno nocooler coolermateriel materielcondition condition issues that would impair their their ability ability to to support support anan inlet inletwater watertemperature temperatureofof107 107OF.

of. AnAn evaluation of cooler capacity was completed using the design bases bases minimum minimum cooling cooling water water and and fluid (Le.,

process fluid (i.e., air) air) flow flow rates, rates, the design fouling factor, factor, the maximum tube plugging plugging allowance, and allowance, and the the maximum maximum processprocess fluid fluid and and cooling cooling water water temperatures.

temperatures. The evaluation determined that with an inlet inlet cooling cooling water water temperature temperatureof of107 107OF OF and the aforementioned aforementioned parameters, the parameters, the room room coolers coolers showed showed margin margin over over required required heat heat rejection rejection capability.

capability. The cooling cooling capability of the ECCS ECGS pump cubicle coolers is is verified on aa regular basis regular basis byby verifying verifying critical parameters (water flow rates, critical rates, air flow rates) remain above minimum design values. values. The The testing used to verify the critical parameters is completed in accordance accordance with with the the LSCS LSGS Generic Generic 89-13 program.

Letter 89-13 program. More More information information regarding regarding thetheECCS EGGSPump PumpCubicle CubicleCoolers Coolersisisshown shown below in Table A5-1. AS-1.

LaSalle County Station Request Request for for aa License License Amendment Amendmentto toTechnical TechnicalSpecification Specification3.7.3, 3.7.3,"Ultimate "UltimateHeat HeatSink" Sink"- -Attachment Attachment5 5 A Discussion of of the the LaSalle LaSalle County County Station Station Core CoreStandby StandbyCooling CoolingSystem -Equipment Cooling Water System-Equipment Water System System (CSCS-ECWS)

(CSCS-ECWS) Heat HeatTransfer TransferCapabilities Capabilitiesatat107 107°F of Page40f4 Page 4 of 4 TaDle le A5-1: La::;alle LaSalle l;ounty  ::;tallonCore Count Station l;oreStandby

tanaoyCooling l;oollngSystem-Equipment

ystem-t

.QulpmentCooling l;oollng Water vvater S::lystem (l;::ll;::l-t:.l;VV::l)Design stem (CSCS-ECWS) ueslgn Information Inrormallon

. . Tube Plugging Equipment Number Noun Name Design Fouling Factor As-tested Fouling Factor Allowance Actual number number of of Tubes Tubes Plugged Plugged Allowance 2

1E12-B001A 1 E12-BO01A 1A RHR Heat Exchanger hr*ft .oF/BTU 0.000742 hrft2*°F/BTU 22 tubes tubes 1E12-B001B 1 E12-B001 B 1 BRHR 1B RHR Heat Heat Exchanger u2 hr*ff*oF/BTU 0.000820 hrft2*°F/BTU 25 tubes 0.00147 0.00147 hr*n*oF/BTU hrft 2 ° F/BTU 53 tubes 2E12-B001A 2E12-BO01A 2A RHR Heat Exchanger hr*ft2 .oF/BTU 0.000410 hrft2*°F/BTU 36 tubes 2E12-BOOHl 2E12-B00113 2B RHR Heat Exchanger hr*ff*oF/BTU 0.00109 hrft2-°F/BTU 12 tubes ODG01A 0 DG Jacket Water Cooler Cooler 0 tubes 1DG01A 1A DG Jacket Water Cooler Cooler 0.00220 0.00220 hr*ff*oF/BTU hrft2°F/BTU 0.000429 hr*ff*oF/BTU hrft2°F/BTU (1) 9 tubes 0 tubes 2DG01A 2A DG Jacket Water Cooler 0 tubes 1E22-SO01 1BBDG DG Jacket Jacket Water Water Cooler Cooler 0.00223 1 tube 1E22-S001 1 0 . 00223 hr.ff.oF/BTU hrft2°F/BTU 00.000447

. 000447 hr.ff.oF/BTU hrft2°F/BTU (2)

(2) 4 tubes 4 tubes 1tube 2E22-S001 29 2B DG Jacket Water Cooler 0 tubes 1 (2)VY01A 1(2)VY01A NW ECCS (A RHR) Pump Cubicle Cooler 0.02832 hr*ff*oF/BTU hrft2°F/BTU NA (3) 1 tube NA (4) 1 (2)VY02A 1(2)VY02A SW ECCS (HPCS) Pump Cubicle Cooler 0.02832 hrft2*°F/BTU hr*ff*oF/BTU NA (3) 1 tube NA (4) 1 (2)VY03A 1(2)VY03A SE ECCS SE ECCS (B/C (B/CC~~I~~

RHR) Pump Pump Cubicle Cubicle 0.02651 0.02651 hr*ff*oF/BTU hrft2°F/BTU NA NA (3) 1 tube 1 tube NA (4)

Cooler I .1(2)VY04A 1(2)VY04A NE ECCS (LPC~:~~~) Pump Cubicle NE ECCS (LPCS/RCIC) Pump Cubicle 0.02229 hrft2*°F/BTU hr*ff*oF/BTU NA (3) 1 tube NA (4)

Cooler Calculated Heat Heat Removal Removal Capability Capability Equipment Number Design HeatHeat Load Heat Transfer Transfer Ratio Ratio at 107 °Fof 1(2)E12-B001A1B 1(2)E12-BO01A/B =

Containment Cooling = 165,564,000 BTU/hr BTUlhr 166,468,480 Btu/hr 0.995 ODG01A ODGO1A 8.6 MBTU/hr MBTUlhr 8,727,760 Btu/hr 0.985 DesignHeatLoad HeatTransferRatio :=

HeatTransferRatio  : DesignHeatLoad 1(2)DG01A 8.6 MBTU/hr MBTUlhr 8,727,760 Btu/hr Btu/hr 0.985 CalculatedHeatRemoval CalculatedHeatRemoval 1(2)E22-S001 1(2)E22-S001 7.8 MBTU/hr rJlBTUlhr 7,916, 590 Btu/hr 7,916,590 0.985 1(2)VYOIA 1(2)VY01A 517,239 BTU/hr 560,505 560, 505 Btu/hr 0.923 1(2)VY02A 1(2)VY02A 646,235 BTU/hr 681,320 Btu/hr 0.949 1(2)VY03A 1(2)VY03A 722,217 BTU/hr BTUlhr 757,712 Btu/hr 0.953 1(2)VY04A 1(2)VY04A 633,288 BTU/hr BTUlhr ._-

697,494 Btu/hr 0.908 Notes:

1. The 2A DG jacket water cooler

1. cooler isis the the representative representative cooler cooler for the 0,0, 1A, 1A, and and 2A2A coolers.

coolers. Results Resultsfrom fromthe thethermal thermalperformance performancetests testsofofthethe2A2Acooler coolerare areapplied appliedtotothe theother other22coolers coolersininaccordance accordance with the LSCS Generic Generic Letter Letter 89-13 89-13 program.

program.

2. The I1B DG jacket

2. Jacket water water cooler cooler isis the the representative representative cooler coolerforforthe the11B Bandand 2B2B coolers.

coolers. Results Resultsfromfromthe thethermal thermalperformance performanceteststestsofofthe the1 1BBare areapplied appliedtotothe the2B 2Bcooler coolerininaccordance accordancewith withthe theLSCS LSCS Generic Letter 89-13 program.

3. The fouling factors for the air-to-water coolers are not predicted because it is not practical to set up test conditions that would allow accurate measurement

3. measurement of of the the fouling fouling factor factor for for these these coolers.

coolers.

4. Note that it is not possible to plug tubes on the air-to-water air-to-Nater coolers, but a conservative input of I1tube tubeplug plugisisconsidered consideredininthethedesign designbasis basisanalysis.

analysis.

ATTACHMENT 6 LASALLE COUNTY STATION STATION UNITS 11 and and 2 Docket Nos. 50-373 and 50-374 License Nos. NPF-11 NPF-11 and NPF-18 Worst 24-Hour and 30-Day Weather Data Resulting 24-Hour and Resulting in in the theMaximum Maximum Plant PlantIntake Intake Temperature Temperature Used in LaSalle County Station Analysis Analysis L-002457, "LaSalle County Station L-002457, "LaSalle County Station Ultimate Heat Sink Analysis," Revision 77

LaSalle County LaSalle County Station Station Request Request forfor aa License License Amendment Amendment to to Technical Specification 3.7.3, "Ultimate Heat Sink" - Attachment Attachment 66 Station Station Year Year Month Month Day Day Hour Hour Ceiling Ceiling Wind Wind Wind Wind Drybulb Drybulb Wetbulb Wetbulb DewPI.

DewPt. Humidity Humidity Press.

Press. Cloud Cloud Freezing Freezing Rain Rain Solar Solar Atmos.

Atmos. Partial PartialPress.

Press.

(feet)

(feet) Direc.

Direc. V(knts)

V(knts) Temp(F)

Temp(F) Temp(F)

Temp(F) Temp(F)

Temp(F) (%)

(%) (inHG)

(inHG) Cov(.1)

Cov(.1) Precip.

Precip. Radial.

Radiat. Radial.

Radiat. WaI.Vap.(inHg)

Wat.Vap.( inHg)

(Btu/ft2/hr) (Btu/ft2/hr)

(Btu/ft2/hr) (Btu/ft2/hr)

Day 11 Julv w-1Dav July 24-25, 24 - 5, 20011 2001 1-30dav_6am

^0. -1900: 7. 1. .00 35000.00 14.00 .81

o. 1900. 7. 1.

0. 1900. 1. 00 35000.00 1.00 35000.00 16.00 16.00 3.00 3.00 75.00 75.00 73.41 73.41 72.77 72.77 93.00 93.00 29.21 29.21 .00

.00 .00

.00 .00

.00 167.89 167.89 113.34 113.34 .81 2.00 o.

0. 1900. 7. 1.

1900. 35000.00 2.00 35000.00 1.00 1.00 3.00 3.00 78.00 78.00 75.63 75.63 74.74 74.74 90.00 90.00 29.21 29.21 .00

.00 .00

.00 .00

.00 223.77 223.77 117.20 117.20 .87

.87 1900. 7. 1.

0. 1900.

O. 3.00 2500.00 3.00 2500.00 3.00 3.00 3.00 3.00 79.00 79.00 76.60 76.60 75.73 75.73 90.00 90.00 29.22 29.22 9.00 9.00 .00

.00 .00

.00 243.81 243.81 134.84 134.84 .90

.90

0. 1900.

O. 1900. 7. 1. 4.00 4.00 35000.00 35 000.00 3.00 3.00 3.00 3.00 82.00 82.00 77.97 77.97 76.55 76.55 84.00 84.00 29.21 29.21 .00

.00 .00

.00 .00

.00 296.46 296.46 122.53 122.53 .93

.93 1900. 7. 1.

0. 1900.

O. 5.00 2200.00 5.00 2200.00 5.00 5.00 2.00 83.00 83.00 78.39 76.78 82.00 82.00 29.20 29.20 9.00 9.00 .00

.00 .00

.00 279.68 279.68 140.95 140.95 .93

.93 O. 1900. 7. 1.

0. 1900. 6.00 6.00 35000.00 35000.00 5.00 5.00 2.00 84.00 84.00 78.51 76.59 79.00 79.00 29.19 29.19 2.00 2.00 .00

.00 .00

.00 293.64 293.64 126.12 126.12 .93

.93 O. 1900. 7. 1.

0. 1900. 7.00 7.00 35000.00 35000.00 9.00 9.00 3.00 3.00 86.00 86.00 78.36 75.64 72.00 29.17 29.17 5.00 5.00 .00

.00 .00

.00 260.40 260.40 133.50 133.50 .90

.90 o.

0. 1900.

1900. 7. 1. 8.00 3100.00 8.00 3100.00 15.00 15.00 3.00 3.00 86.00 86.00 78.95 76.50 74.00 74.00 29.16 29.16 9.00 9.00 .00

.00 .00

.00 210.69 210.69 145.69 145.69 .93

.93

0. 1900.

O. 1900. 7. 1. 9.00 9.00 35000.00 35000.00 9.00 9.00 4.00 4.00 87.00 87.00 79.87 77.47 74.00 29.14 29.14 2.00 2.00 .00

.00 .00

.00 172.86 172.86 130.35 130.35 .96

.96 o.

0. 1900.

1900. 7. 1. 10.00 10.00 35000.00 35000.00 10.00 10.00 3.00 87.00 79.87 77.47 74.00 29.14 29.14 2.00 2.00 .00

.00 .00

.00 111.68 111.68 130.35 130.35 .96

.96 o.

0. 1900.

1900. 7. 1. 11.00 11.00 35000.00 35000.00 9.00 4.00 86.00 79.82 77.74 77.00 29.13 29.13 .00

.00 .00

.00 .00

.00 50.63 50.63 128.06 128.06 .96

.96 o.

0. 1900.

1900. 7. 1. 12.00 12.00 35000.00 35000.00 9.00 3.00 86.00 80.39 78.54 78 .54 79.00 79 .00 29.14 29 .14 .00

.00 .00

.00 .00

.00 .00

.00 128.06 128.06 .99

.99

0. 1900.

O. 1900. 7. 1. 13.00 13.00 35000.00 35000.00 10.00 10.00 3.00 85.00 80.28 78.74 82.00 82.00 29.12 29.12 2.00 2.00 .00

.00 .00

.00 .00

.00 127.52 127.52 1.00 1.00

0. 1900.

O. 1900. 7. 1. 14.00 14.00 35000.00 35000.00 9.00 3.00 83.00 79.19 77.90 85.00 85.00 29.16 29.16 .00

.00 .00

.00 .00

.00 .00

.00 123.89 123.89 .97

.97

0. 1900.

O. 1900. 7. 1. 15.00 35000.00 15.00 35000.00 9.00 1.00 83.00 79.71 78.63 87.00 29.17 29.17 .00

.00 .00

.00 .00

.00 .00

.00 123.89 123.89 .99

.99

0. 1900.

O. 1900. 7. 1. 16.00 35000.00 16.00 35000.00 11.00 6.00 80.00 78.31 77.74 93.00 93.00 29.19 29.19 5.00 5.00 .00

.00 .00

.00 .00

.00 124.94 124.94 .96

.96 o.

0. 1900.

1900. 7. 1. 17.00 35000.00 17.00 35000.00 1.00 6.00 74.00 74.00 73.99 100.00 89.00 29.15 29.15 29.11 5.00 5.00 5.00

.00

.00

.00

.00

.00

.00

.00

.00

.00 116.83 116.83 118.15

.85

.85

.78

0. 1900.

O. 1900. 7. 1. 18.00 35000.00 18.00 35000.00 2.00 6.00 75.00 72.48 71.43 89.00 29.11 5.00 .00 .00 .00 118.15 .78

0. 1900.

O. 1900. 7. 1. 19.00 35000.00 19.00 35000.00 5.00 5.00 75.00 72.71 72 .71 71.77 90.00

90. 00 29.12 29.12 .00

.00 .00

.00 .00

.00 .00

.00 113.34 113.34 .79

.79

0. 1900.

O. 1900. 7. 1. 20.00 35000.00 20.00 35000.00 1.00 4.00 73.00 73.00 72.99 100.00 100.00 29.14 29.14 .00

.00 .00

.00 .00

.00 .00

.00 110.82 110.82 .82

.82

0. 1900.

O. 1900. 7. 1. 21.00 35000.00 21.00 35000.00 6.00 3.00 72.00 72.00 71.99 100.00 100.00 29.13 29.13 .00

.00 .00

.00 .00

.00 .00

.00 109.58 109.58 .79

.79

0. 1900.

O. 1900. 7. 1. 22.00 35000.00 22.00 35000.00 4.00 3.00 73.00 73.00 72.99 100.00 100.00 29.10 29.10 .00

.00 .00

.00 .00

.00 .00

.00 110.82 110.82 .82

.82 o.

0. 1900.

O.

1900. 7. 1.

1900. 7. 2.

23.00 23:88 6 0 68 0.0 2 0.0 0

. 8 5.00 5.8 16.

0 0

5.0 5.08 4.0 73.8

-MOO

67. 0 0 72.1~

72.1 66.8 71.74 66.66 ~3:88 96.00 29.14 29.14 29.22 10.8 10.00

10. 0 0 .00

.00

.00

.00

.00

.000 ~~:i~

34J 5129.66 7Z 19 12~.66 12 .14 121 IT 1 79

.79

.66 o.

0. 1900. 7. 2.

1900. 7. 2. 1.00 1.00 400.00 400.00 1.00 2.00 67.00 67.00 66.96 100.00 29.23 29.23 10.00 10.00 .00

.00 .00

.00 146.19 146 .19 121.14 121.14 .67

.67 o.

0. 1900.

1900. 7. 2.

7. 2. 2.00 2.00 800.00 800.00 16.00 16.00 2.00 68.00 68.00 67.97 67.97 100.00 29.23 29.23 6.00 6.00 .00

.00 .00

.00 214.89 111.13 214.89 111.13 .69

.69 o.

0. 1900.

1900. 7. 2.

7. 2. 3.00 35000.00 3.00 35000.00 15.00 3.00 70.00 68.51 67.79 67.79 93.00 93.00 29.24 29.24 2.00 2.00 .00

.00

.00

.00

.00

.00 268.12 268.12 291.26 115.12 107.86 107.86 115.12

.69

.69

.66

0. 1900.

O. 1900. 7.

7. 2.2. 4.00 35000.00 4.00 35000.00 12.00 1.00 74.00 68.89 66.47 78.00 78.00 29.24 29.24 4.00 4.00 .00 .00 291.26 .66 o.

0. 1900.

1900. 7.

7. 2.2. 5.00 35000.00 5.00 35000.00 13.00 13.00 3.00 76.00 68.17 68 .17 64.32 64 .32 68.00 68.00 29.23 29.23 2.00 2.00 .00

.00

.00

.00

.00

.00 309.24 115.39 309.24 293.26 115.39 120.83

.62

.62

.57

0. 1900.

O. 1900. 7. 7. 2.2. 6.00 35000.00 6.00 35000.00 13.00 5.00 77.00 67.15 62.06 61.00 61.00 29.23 29.23 5.00 5.00 .00 .00 293.26 120.83 .57

0. 1900.

O. 1900. 7.7. 2.2. 7.00 35000.00 7.00 35000.00 13.00 13.00 6.00 79.00 67.42 61.42 56.00 56.00 29.23 29.23 5.00 5.00 .00

.00 .00

.00 268.43 123.55 268.43 123.55 .56

.56

0. 1900.

O. 1900. 7.7. 2.2. 8.00 35000.00 8.00 35000.00 13.00 13.00 6.00 6.00 81.00 67.24 59.95 59.95 50.00 50.00 29.22 29.22 7.00 7.00 .00

.00 .00

.00 223.47 131.27 223.47 131.27 .53

.53

0. 1900.

O. 1900. 7.

7. 2.2. 9.00 35000.00 9.00 35000.00 13.00 13.00 6.00 6.00 82.00 67.74 60.27 49.00 49.00 29.21 29.21 6.00 6.00 .00

.00 .00

.00 173.29 130.03 173.29 130.03 .54

.54

0. 1900.

O. 1900. 7.

7. 2.2. 10.00 35000.00 10.00 35000.00 13.00 13.00 6.00 6.00 82.00 68.06 60.87 50.00 50.00 29.18 29.18 7.00 7.00 .00

.00 .00

.00 111.90 132.74 111.90 132.74 .55

.55

0. 1900.

O. 1900. 7.7. 2.2. 11.00 35000.00 11.00 35000.00 13.00 6.00 6.00 82.00 68.70 62.02 52.00 52.00 29.18 29.18 6.00 6.00 .00

.00 .00

.00 51.69 130.03 51.69 130.03 .57

.57

0. 1900.

O. 1900. 7. 7. 2.2. 12.00 35000.00 12.00 35000.00 13.00 13.00 5.00 81.00 81.00 68.50 68.50 62.21 62 .21 54.00

54. 00 29.18 29.18 5.00 5.00 .00

.00 .00

.00 .00 126.33

.00 126.33 .58

.58

o. 1900.

0. 1900. 7. 2.

7. 2. 13.00 35000.00 13.00 35000.00 14.00 14.00 3.00 3.00 80.00 80.00 70.04 70.04 65.37 65.37 62.00 62.00 29.16 29.16 5.00 5.00 .00

.00 .00

.00 .00 124.94

.00 124.94 123.55

.64

.64

.62

0. 1900. 7.

O. 1900. 7. 2. 2. 14.00 35000.00 14.00 35000.00 12.00 12.00 1.00 1.00 79.00 79.00 69.17 69 .17 64.43

64. 43 62.00 62.00 29.17 29.17 5.00 5.00 .00

.00 .00

.00 .00 123.55

.00 .62

0. 1900. 7.

O. 1900. 7. 2. 2. 15.00 35000.00 15.00 35000.00 7.00 7.00 1.00 1.00 76.00 76.00 68.96 68.96 65.61 65.61 71.00 71.00 29.17 29.17 5.00 5.00 .00

.00 .00

.00 .00 119.48

.00 119.48 .64

.64

0. 1900. 7.

O. 1900. 7. 2. 2. 16.00 35000.00 16.00 35000.00 9.00 9.00 3.00 3.00 73.00 73.00 67.96 67.96 65.50 65.50 78.00 78.00 29.18 29.18 6.00 6.00 .00

.00 .00

.00 .00 117.60

.00 117.60 .64

.64 0.

O. 1900.

1900. 7.7. 2.2. 17.00 35000.00 17.00 35000.00 9.00 9.00 4.00 4.00 73.00 73.00 67.96 67.96 65.50 65.50 78.00 78.00 29.18 29.18 6.00 6.00 .00

.00 .00

.00 .00 117.60

.00 117.60 .64

.64

0. 1900. 7.

O. 1900. 7. 2. 2. 18.00 35000.00 18.00 35000.00 9.00 9.00 4.00 4.00 71.00 71.00 66.79 66.79 64.67 64.67 81.00 81.00 29.18 29.18 6.00 6.00 .00

.00 .00

.00 .00 114.98

.00 114.98 .62

.62

0. 1900. 7.

O. 1900. 7. 2. 2. 19.00 35000.00 19.00 35000.00 9.00 9.00 4.00 4.00 70.00 70.00 66.30 66.30 64.41 64.41 83.00 83.00 29.16 29.16 2.00 2.00 .00

.00 .00

.00 .00 107.86

.00 107.86 .61

.61 0.

O. 1900.

1900. 7.7. 2.2. 20.00 35000.00 20.00 35000.00 9.00 9.00 5.00 5.00 69.00 69.00 66.02 66.02 64.48 64.48 86.00 86.00 29.16 29.16 2.00 2.00 .00

.00 .00

.00 .00 106.64

.00 106.64 .61

.61

0. 1900. 7.

O. 1900. 7. 2. 2. 21.00 35000.00 21.00 35000.00 9.00 9.00 5.00 5.00 68.00 68.00 66.55 66.55 65.80 65.80 93.00 93.00 29.14 29.14 2.00 2.00 .00

.00 .00

.00 .00 105.44

.00 105.44 .64

.64

0. 1900. 7.

O. 1900. 7. 2. 2. 22.00 35000.00 22.00 35000.00 9.00 9.00 6.00 6.00 69.00 69.00 66.89 66.89 65.83 65.83 90.00 90.00 29.12 29.12 2.00 2.00 .00

.00 .00

.00 .00 106.64

.00 106.64 .64

.64

o. 1900.

0. 1900. 7.

7. 2.2. 23.00 35000.00 23.00 35000.00 9.00 9.00 6.00 6.00 70.00 70.00 67.20 67.20 65.81 65.81 87.00 87.00 29.12 29.12 9.00 9.00 .00

.00 .00

.00 39.79 121.88 39.79 121.88 .64

.64

0. 1900. 7.

O. 1900. 7. 3. 3. .00 35000.00

.00 35000.00 9.00 9.00 6.00 6.00 71.00 71.00 68.83 68.83 67.81 67.81 90.00 90.00 29.11 29 .11 10.00 10 .00 .00

.00 .00

.00 91.02 126.77 91.02 126.77 .69

.69

0. 1900. 7.

O. 1900. 7. 3.3. 1.00 35000.00 1.00 35000.00 9.00 9.00 7.00 7.00 74.00 74.00 71.04 71.04 69.75 69.75 87.00 87.00 29.11 29.11 10.00 10.00 .00

.00 .00

.00 144.84 131.12 144.84 131.12 .74

.74

0. 1900. 7.

O. 1900. 7. 3. 3. 2.00 35000.00 2.00 35000.00 9.00 9.00 7.00 7.00 77.00 77.00 72.44 72.44 70.53 70.53 81.00 81.00 29.10 29.10 10.00 10.00 .00

.00 .00

.00 192.91 135.61 192.91 135.61 .76

.76

0. 1900. 7.

O. 1900. 7. 3. 3. 3.00 3.00 25000.00 25000.00 9.00 9.00 7.00 7.00 80.00 80.00 73.96 73.96 71.52 71.52 76.00 76.00 29.10 29.10 10.00 10.00 .00

.00 .00

.00 230.60 140.22 230.60 140.22 .78

.78 0.

O. 1900.

1900. 7.7. 3.3. 4.00 4.00 1400.00 1400.00 10.00 10.00 8.00 8.00 81.00 81.00 72.37 72.37 68.65 68.65 67.00 67.00 29.14 29.14 10.00 10.00 .00

.00 .00

.00 256.53 141.78 256.53 141.78 .71

.71

0. 1900. 7.

O. 1900. 7. 3. 3. 5.00 15000.00 5.00 15000.00 10.00 10.00 7.00 7.00 81.00 81.00 72.94 72.94 69.54 69.54 69.00 69.00 29.08 29.08 10.00 10.00 .00

.00 .00

.00 265.58 141.78 265.58 141. 78 .74

.74

0. 1900. 7.

O. 1900. 7. 3. 3. 6.00 25000.00 6.00 25000.00 15.00 15.00 8.00 8.00 71.00 71.00 71.00 71.00 70.98 70.98 100.00 100.00 29.06 29.06 7.00 7.00 .00

.00 .00

.00 282.56 117.37 282.56 117.37 .76

.76

0. 1900. 7.

O. 1900. 7. 3. 3. 7.00 15000.00 7.00 15000.00 1.00 1.00 3.00 3.00 77.00 77.00 71.68 71.68 69.39 69.39 78.00 78.00 29.08 29.08 7.00 7.00 .00

.00 .00

.00 258.93 125.56 258.93 125.56 .73

.73

0. 1900. 7.

O. 1900. 7. 3. 3. 8.00 15000.00 8.00 15000.00 13.00 13.00 2.00 2.00 79.00 79.00 73.03 73.03 70.55 70.55 76.00 76.00 29.06 29.06 7.00 7.00 .00

.00 .00

.00 218.98 128.39 218.98 128.39 .76

.76

0. 1900. 7.

O. 1900. 7. 3. 3. 9.00 25600.00 9.00 251100.00 12.00 12.00 5.00 5.00 80.00 80.00 72.59 72.59 69.45 69.45 71.00 71.00 29.06 29.06 7.00 7.00 .00

.00 .00

.00 168.06 129.82 168.06 129.82 .73

.73 0.

O. 1900.

1900. 7.7. 3.3. 10.00 25000.00 10.00 25000. 00 13.00 13.00 7.00 7.00 80.00 80 .00 72.03

72. 03 68.59 68.59 69.00 69.00 29.05 29.05 7.00 7.00 .00

.00 .00

.00 109.55 129.82 109.55 129.82 .71

.71

0. 1900. 7.

O. 1900. 7. 3. 3. 11.00 11.00 35000.00 35000.00 12.00 12.00 9.00 9.00 80.00 80.00 72.59 72.59 69.45 69.45 71.00 71.00 29.03 29.03 7.00 7.00 .00

.00 .00

.00 49.58 129.82 49.58 129.82 .73

.73

0. 1900. 7.

O. 1900. 7. 3. 3. 12.00 12.00 15000.00 15000.00 13.00 13.00 9.00 9.00 80.00 80.00 73.41 73.41 70.70 70.70 74.00 74.00 29.02 29.02 7.00 7.00 .00

.00 .00

.00 .00 129.82

.00 129.82 .76

.76 LOay 2 begins moors' 30-day period (i.e., July 21, 1995)

LaSalle LaSalle County Station Request for a License Amendment to Technical Specification Specification 3.7.3, 3.7.3, "Ultimate "Ultimate Heat Heat Sink" Sink" -- Attachment Attachment 66 Station Year Station Year Month Month Day Day Hour Ceiling Wind Wind Drybulb Wetbulb DewPt. Humidity Press. Cloud Freezing Rain Solar Atmos. Partial Press.

(feet) Direc. V(knts) Temp(F) Temp(F) Temp(F) (%) (inHG) Cov(.1) Precip. Radiat. Radiat. Wat.Vap.(inHg)

(Btu/ft2/hr) (Btu/ft2/hr)

(Btu/ft2/hr) (Btu/ft2/hr) 1-30day_6am 1-30day_6am O.

0. 1900.

1900. 7.

7. 3.3. 13.00 13.00 25000.00 13.00 13.00 6.00 78.00 78.00 72.88 70.75 79.00 79.00 29.04 29.04 7.00 7.00 .00

.00 .00

.00 .00

.00 126.97 126.97 .76

.76 O.

0. 1900.

1900. 7.

7. 3.3. 14.00 14.00 35000.00 13.00 13.00 3.00 76.00 72.24 70.66 84.00 84.00 29.05 29.05 7.00 7.00 .00

.00 .00

.00 .00

.00 124.16 124.16 .76

.76 O. 1900.

0. 1900. 7.

7. 3.

3. 15.00 35G00.00 35000.00 12.00 4.00 76.00 12.24 72.24 70.66 84.00 84.00 29.08 29.08 2.00 2.00 .00

.00 .00

.00 .00

.00 115.39 115.39 .76

.76 O. 1900. 7.

0. 1900. 7. 3.3. 16.00 35000.00 13.00 5.00 75.00 72.01 70.74 87.00 87.00 29.09 29.09 6.00 .00

.00 .00

.00 .00

.00 120.27 120.27 .76

.76 O. 1900. 7.

0. 1900. 7. 3.3. 17.00 35000.00 13.00 3.00 73.00 71.45 70.78 93.00 93.00 29.10 29.10 5.00 5.00 .00

.00 .00

.00 .00

.00 115.53 115.53 .76

.76 O.

0. 1900. 7. 3. 18.00 35000.00 11.00 3.00 12.00 72.00 71.13 70.74 96.00 96.00 29.10 29.10 2.00 2.00 .00

.00 .00

.00 .00

.00 110.32 110.32 .76

.76 O.

0. 1900. 7. 3.

1900. 7. 3. 19.00 35000.00 12.00 5.00 12.00 72.00 70.47 69.78 93.00 29.09 29.09 1.00 1.00 .00

.00 .00

.00 .00

.00 109.76 109.76 .74

.74 O.

0. 1900. 7. 3.

1900. 7. 3. 20.00 35000.00 13.00 4.00 71.00 69.49 68.79 93.00 29.08 29.08 1.00 1.00 .00

.00 .00

.00 .00

.00 108.53 108.53 .71

.71 O.

0. 1900. 7. 3.

1900. 7. 3. 21.00 35000.00 12.00 5.00 70.00 69.79 69.67 99.00 99.00 29.08 29.08 .00 .00

.00 .00

.00 .00

.00 107.13 107.13 .73

.73 O.

0. 1900. 7. 3. 22.00 35000.00 13.00 5.00 69.00 69.00 68.97 100.00 29.07 29.07 .00 .00

.00 .00

.00 .00

.00 105.92 105.92 .71

.71 O.

0. 1900.

1900. 7.

7. 3.3. 23.00 35000.00 12.00 3.00 68.00 68.00 67.97 100.00 29.08 29.08 7.00 .00

.00 .00

.00 39.74 39.74 113.45 113.45 .69

.69 O.

0. 1900. 7. 4. .00

.00 35000.00 11.00 3.00 69.00 69.00 68.97 100.00 29.08 29.08 10.00 .00

.00 .00

.00 90.15 90.15 123.93 123.93 .71

.71 O.

0. 1900.

1900. 7.

7. 4.4. 1.00 25000.00 11.00 3.00 70.00 70.00 69.98 100.00 29.10 29.10 9.00 9.00 .00

.00 .00

.00 154.34 154.34 121.88 121.88 .74

.74

0. 1900. 7. 4.

O. 2.00 200.00 13.00 4.00 74.00 73.11 12.74 72.74 96.00 96.00 29.14 10.00 .00

.00 .00

.00 150.52 150.52 131.12 131.12 .81

.81

0. 1900. 7. 4.

O. 3.00 2700.00 13.00 4.00 77.00 70.39 67.39 73.00 29.14 10.00 .00

.00 .00

.00 231.12 231.72 135.61 135.61 .68

.68 O.

0. 1900. 7. 4. 4.00 12000.00 12.00 2.00 79.00 73.03 70.55 76.00 29.09 10.00 10.00 .00

.00 .00

.00 255.25 255.25 138.66 138.66 .76

.76 O.

0. 1900. 7. 4. 5.00 15000.00 8.00 4.00 76.00 12.24 72.24 70.66 84.00 84.00 29.11 29.11 9.00 .00

.00 .00

.00 283.28 283.28 130.40 130.40 .76

.76 O.

0. 1900. 7. 4. 6.00 25000.00 16.00 6.00 73.00 71.45 70.78 93.00 93.00 29.12 8.00 .00

.00 .00

.00 279.09 279.09 122.87 122.87 .76

.76 O.

0. 1900. 7. 4. 7.00 25000.00 4.00 4.00 77.00 71.69 69.39 78.00 78.00 29.11 7.00 .00

.00 .00

.00 258.39 258.39 125.56 125.56 .73

.73 O.

0. 1900. 7. 4. 8.00 35000.00 5.00 4.00 79.00 73.03 70.55 76.00 29.09 29.09 7.00 7.00 .00

.00 .00

.00 218.41 218.41 128.39 128.39 .76

.76 O.

0. 1900. 7. 4.

1900. 7. 4. 9.00 35000.00 5.00 4.00 80.00 72.59 69.45 71.00 29.06 29.06 9.00 .00

.00 .00

.00 163.85 163.85 136.34 136.34 .73

.73 O.

0. 1900. 7. 4.

1900. 7. 4. 10.00 35000.00 35000.00 5.00 3.00 80.00 73.41 73.41 70.70 74.00 74.00 29.06 29.06 7.00 7.00 .00

.00 .00

.00 108.39 108.39 129.82 129.82 .76

.76 O.

0. 1900. 7. 4.

1900. 7. 4. 11.00 25000.00 5.00 5.00 80.00 73.41 70.70 74.00 74.00 29.08 29.08 7.00 7.00 .00

.00 .00

.00 48.75 48.75 129.82 129.82 .76

.76 O.

0. 1900. 7. 4. 12.00

12. 00 25000.00 5.00 4.00 80.00 73.41 73 .41 70.70 74.00

74. 00 29.08 29.08 7.00 7.00 .00

.00 .00

.00 .00

.00 129.82 129.82 .76

.76 O.

0. 1900. 7. 4.

1900. 7. 4. 13.00 15000.00 6.00 3.00 79.00 73.03 70.55 70.55 76.00 76.00 29.07 29.07 8.00 8.00 .00

.00 .00

.00 .00

.00 131.41 131.41 .76

.76 O.

0. 1900. 7. 4. 14.00

14. 00 15000.00 6.00 2.00 77.00 73.19 73.19 71.64 71.64 84.00 84.00 29.09 29.09 10.00 10.00 .00

.00 .00

.00 .00

.00 135.61 135.61 .79

.79 O.

0. 1900. 7. 4. 15.00 15000.00 6.00 3.00 76.00 73.68 12.76 72.76 90.00 90.00 29.11 29.11 10.00 .00

.00 .00

.00 .00

.00 134.10 134.10 .81

.81

0. 1900. 7. 4.

O. 16.00 5400.00 16.00 5400.00 5.00 3.00 75.00 73.41 73.41 12.77 72.77 93.00 93.00 29.10 29.10 9.00 9.00 .00

.00 .00

.00 .00

.00 128.94 128.94 .81

.81 O.

0. 1900. 7. 4. 17.00

17. 00 15000.00 7.00 3.00 74.00 73.11 73 .11 12.74

72. 74 96.00 96.00 29.10 29.10 10.00 .00

.00 .00

.00 .00

.00 131.12 131.12 .81

.81 O.

0. 1900. 7. 4. 18.00 35000.00 35000.00 8.00 2.00 12.00 72.00 69.80 68.80 90.00 90.00 29.10 29.10 2.00 2.00 .00

.00 .00

.00 .00

.00 110.32 110.32 .71

.71 O.

0. 1900. 7. 4.

1900. 7. 4. 19.00 35000.00 35000.00 7.00 2.00 12.00 72.00 69.12 67.78 87.00 87.00 29.10 29.10 .00

.00 .00

.00 .00

.00 .00

.00 109.58 109.58 .69

.69 O.

0. 1900. 7. 4.

1900. 7. 4. 20.00 35000.00 35000.00 14.00 1.00 71.00 67.93 66.45 86.00 86.00 29.09 29.09 .00

.00 .00

.00 .00

.00 .00

.00 108.35 108.35 .66

.66 O.

0. 1900. 7. 4.

1900. 7. 4. 21.00 35000.00 35000.00 9.00 1.00 70.00 67.64 66.48 66.48 89.00 89.00 29.09 29.09 .00

.00 .00

.00 .00

.00 .00

.00 107.13 107.13 .66

.66 O.

0. 1900. 7. 4. 22.00 35000.00 7.00 1.00 70.00 66.30 64.41 64.41 83.00 83.00 29.08 29.08 .00

.00 .00

.00 .00

.00 .00

.00 107.13 107.13 .61

.61 O.

0. 1900. 7. 4.

1900. 7. 4. 23.00 35000.00 6.00 2.00 68.00 65.27 63.83 87.00 87.00 29.12 29.12 .00

.00 .00

.00 .00

.00 42.45 42.45 104.12 104.72 .60

.60 O.

0. 1900. 7. 5. .00 35000.00 8.00 2.00 69.00 67.53 67.53 66.80 93.00 93.00 29.12 29.12 2.00 2.00 .00

.00 .00

.00 103.66 103.66 106.64 106.64 .66

.66 O. 1900. 7. 5.

0. 1900. 1.00 35000.00 10.00 2.00 12.00 72.00 69.12 67.78 87.00 87.00 29.13 29.13 2.00 2.00 .00

.00 .00

.00 166.21 166.21 110.32 110.32 .69

.69 O.

0. 1900. 7. 5. 2.00 35000.00 13.00 4.00 74.00 71.05 69.75 87.00 87.00 29.14 29.14 7.00 7.00 .00

.00 .00

.00 210.11 210 .11 121.41 121.41 .74

.74

0. 1900.O. 1900.7.7. 5. 5. 35000.00 3.00 35000.00 12.00 5.00 75.00 75.00 71.29 69.67 69.67 84.00 84.00 29.15 29.15 7.00 7.00 .00

.00 .00

.00 251.95 251.95 122.78 122.78 .74

.74 O.

0. 1900. 7. 5. 35000.00 4.00 35000.00 12.00 6.00 79.00 71.14 67.63 69.00 69.00 29.14 29.14 10.00 10.00 .00

.00 .00

.00 255.97 255.97 138.66 138.66 .69

.69 O.

0. 1900. 7. 5. 5.00 35000.00 12.00 5.00 81.00 71.50 71.50 67.27 64.00 64.00 29.15 29.15 10.00 10.00 .00

.00 .00

.00 265.58 265.58 141. 78 141.78 .68

.68 O.

0. 1900. 7. 5.

1900. 7. 5. 6.00 35000.00 11.00 7.00 83.00 83.00 70.81 65.15 56.00 56.00 29.15 29.15 10.00 10.00 .00

.00 .00

.00 259.75 259.75 144.95 144.95 .64

.64 O.

0. 1900. 7. 5.

1900. 7. 5. 35000.00 7.00 35000.00 12.00 9.00 84.00 70.03 63.29 63.29 51.00 51.00 29.14 29 .14 10.00

10. 00 .00

.00 .00

.00 238.03 238.03 146.56 146.56 .60

.60 O.

0. 1900. 7. 5. 8.00 25000.00 12.00 10.00 85.00 85.00 12.51 72.51 67.01 67.01 56.00 56.00 29.14 29.14 9.00 9.00 .00

.00 .00

.00 214.47 214.47 144.10 144.10 .68

.68 O. 1900. 7. 5.

0. 1900. 25000.00 9.00 25000.00 13.00 9.00 85.00 85.00 73.79 73.79 69.10 60.00 60.00 29.13 29.13 10.00 10.00 .00

.00 .00

.00 152.54 152.54 148.19 148.19 .73

.73 O. 1900. 7. 5.

0. 1900. 10.00 25000.00 13.00 8.00 84.00 12.29 72.29 67.13 58.00 58.00 29.13 29.13 10.00 10.00 .00

.00 .00

.00 99.19 99.19 146.56 146.56 .68

.68 O. 1900. 7. 5.

0. 1900. 11.00

11. 00 25000.00 13.00 6.00 82.00 73.27 69.60 67.00 67.00 29.12 29 .12 10.00

10. 00 .00

.00 .00

.00 44.06 44.06 143.36 143.36 .74

.74 O.

0. 1900. 7. 5.

1900. 7. 5. 12.00 15000.00 12.00 4.00 81.00 73.50 73.50 70.41 71.00 71.00 29.10 29.10 10.00 10.00 .00

.00 .00

.00 .00

.00 141.78 141.78 .76

.76 O.

0. 1900. 7. 5.

1900. 7. 5. 13.00 15000.00 11.00 4.00 80.00 70.62 66.32 64.00 64.00 29.12 29.12 10.00 10.00 .00

.00 .00

.00 .00

.00 140.22 140.22 .66

.66 O. 1900. 7. 5.

0. 1900. 14.00

14. 00 15000.00 11.00 3.00 78.00 69.96 66.23 68.00 68.00 29.11 29 .11 10.00 10 .00 .00

.00 .00

.00 .00

.00 137.13 137.13 .66

.66 O.

0. 1900. 7.

7. 5. 15.00 25000.00 11.00 3.00 77.00 69.87 66.57 71.00 29.12 29.12 7.00 7.00 .00

.00 .00

.00 .00

.00 125.56 125.56 .66

.66 O. 1900.

0. 1900. 7. 5. 16.00 25000.00 12.00 12.00 4.00 75.00 68.56 65.47 73.00 73.00 29.14 29.14 7.00 7.00 .00

.00 .00

.00 .00

.00 122.78 122.78 .64

.64 O. 1900.

0. 1900. 7.7. 5.5. 17.00

17. 25000.00 00 25000.00 11.00 11.00 4.00 74.00 68.39 65.70 65.70 76.00 76.00 29.14 29.14 7.00 7.00 .00

.00 .00

.00 .00

.00 121.41 121.41 .64

.64 O. 1900.

0. 1900. 7.7. 5.5. 18.00 35(`00.00 18.00 35000.00 13.00 13.00 5.00 12.00 72.00 67.73 65.65 65.65 81.00 81.00 29.13 29.13 2.00 2.00 .00

.00 .00

.00 .00

.00 110.32 110.32 .64

.64 O. 1900.

0. 1900. 7. 5.

5. 15000.00 19.00 15000.00 13.00 13.00 3.00 71.00 67.48 65.75 65.75 84.00 84.00 29.14 29.14 10.00 10.00 .00

.00 .00

.00 .00

.00 126.77 126.77 .64

.64 O. 1900. 7. 5.

0. 1900. 7. 5. 15000.00 20.00 15000.00 13.00 13.00 3.00 70.00 67.64 66.48 66.48 89.00 89.00 29.14 29 .14 10.00

10. 00 .00

.00 .00

.00 .00

.00 125.34 125.34 .66

.66 O. 1900. 7. 5.

0. 1900. 7. 5. 15000.00 21.00 15000.00 11.00 11.00 4.00 69.00 68.16 67.75 67.75 96.00 96.00 29.14 29.14 10.00 10.00 .00

.00 .00

.00 .00

.00 123.93 123.93 .69

.69 O. 1900.

0. 1900. 7.7. 5. 8~00.00 22.00 800.00 10.00 10.00 4.00 67.00 66.80 66.66 66.66 99.00 99.00 29.14 29.14 7.00 7.00 .00

.00 .00

.00 .00

.00 112.17 112.17 .66

.66 O. 1900.

0. 1900. 7.7. 5.5. 8500.00 23.00 8500.00 11.00 11.00 5.00 67.00 67.00 100.00 66.96 100.00 66.96 29.16 29.16 10.00 10.00 .00

.00 .00

.00 35.13 35.13 121.14 121.14 .67

.67 O. 1900.

0. 1900. 7.7. 6.6. .00 35000.00 12.00 12.00 5.00 68.00 68.00 67.97 100.00 67.97 100.00 29.16 29.16 2.00 2.00 .00

.00 .00

.00 102.62 102.62 105.44 105.44 .69

.69 O. 1900. 7. 6.

0. 1900. 7. 6. 35000.00 1.00 35000.00 13.00 13.00 5.00 69.00 68.16 67.75 67.75 96.00 96.00 29.17 29.17 1.00 1.00 .00

.00 .00

.00 167.17 167.17 106.10 106.10 .69

.69 page 22 Page

LaSalle LaSalle County Station Request for a License Amendment to Technical Specification 3.7.3,3.7.3, "Ultimate "Ultimate Heat Heat Sink" Sink" -- Attachment Attachment 66 Year Month Station Year Station Month Day Day Hour Ceiling Wind Wind Drybulb Wetbulb DewPt. Humidity Press. Cloud Freezing Rain Solar Atmos. Partial Press.

(feet) Direc. V(knts) Temp(F) Temp(F) Temp(F) (%) (inHG) Cov(.1) Precip. Radiat. Radiat. Wat.Vap.(inHg)

Wat.Vap .(inHg)

(Btu/ft2/hr) (Btu/ft2/hr) 1-30day_6am 1-30day_6am O.

0. 1900. 7. 6. 2.00 35000.00 12.00 6.00 72.00 69.80 69.80 68.80 90.00 90.00 29.18 29.18 1.00 1.00 .00

.00 .00

.00 223.36 223.36 109.76 109.76 .71

.71 O.

0. 1900. 7. 6. 3.00 35000.00 13.00 7.00 75.00 72.01 70.74 87.00 87.00 29.18 29.18 .00

.00 .00

.00 .00

.00 269.76 269.76 113.34 113.34 .76

.76 O.

0. 1900. 7. 6. 4.00 35000.00 13.00 5.00 78.00 78.00 74.15 74.15 72.62 84.00 29.18 29.18 2.00 2.00 .00

.00 .00

.00 292.02 292.02 118.00 118.00 .81

.81 O.

0. 1900. 7. 6. 5.00 35000.00 13.00 4.00 81.00 74.34 71.67 74.00 74.00 29.17 29.17 4.00 4.00 .00

.00 .00

.00 297.18 297.18 124.48 124.48 .79

.79 O.

0. 1900. 7. 6. 6.00 35000.00 13.00 4.00 83.00 83.00 72.06 67.22 67.22 60.00 29.17 29.17 2.00 .00

.00 .00

.00 297.88 297.88 124.74 124.74 .68

.68 O.

0. 1900. 7. 6. 7.00 35000.00 13.00 5.00 85.00 71.86 65.92 54.00 29.17 29.17 1.00 .00

.00 .00

.00 275.42 275.42 126.87 126.87 .66

.66 O.

0. 1900.

1900. 7.

7. 6.

6. 8.00 35000.00 13.00 4.00 86.00 72.37 66.28 53.00 29.17 29.17 4.00 4.00 .00

.00 .00

.00 225.88 225.88 131.54 131.54 .66

.66 O.

0. 1900.

1900. 7.

7. 6.

6. 9.00 12900.00 12.00 4.00 87.00 73.88 68.33 55.00 55.00 29.17 29.17 9.00 .00

.00 .00

.00 162.88 162.88 147.30 147.30 .71

.71 O.

0. 1900.

1900. 7.

7. 6.

6. 10.00 12000.00 11.00 5.00 87.00 75.21 70.46 59.00 29.18 10.00 .00

.00 .00

.00 97.82 97.82 151.48 151.48 .76

.76 O.

0. 1900.

1900. 7.

7. 6.

6. 11.00 12000.00 12.00 6.00 87.00 76.50 72.47 63.00 29.16 9.00 9.00 .00

.00 .00

.00 46.10 46.10 147.30 147.30 .81

.81 O.

0. 1900.

1900. 7.

7. 6.

6. 12.00 35000.00 12.00 4.00 85.00 75.35 71.53 65.00 29.14 4.00 4.00 .00

.00 .00

.00 .00

.00 130.10 130.10 .79

.79 O.

0. 1900.

1900. 7.

7. 6.

6. 13.00 35000.00 12.00 5.00 82.00 73.85 70.50 69.00 29.14 29.14 2.00 2.00 .00

.00 .00

.00 .00

.00 123.36 123.36 .76

.76 O.

0. 1900. 7. 6. 14.00 35000.00 12.00 3.00 80.00 72.04 68.58 69.00 29.15 29.15 1.00 .00

.00 .00

.00 .00

.00 120.05 120.05 .71

.71 O.

0. 1900. 7. 6. 15.00 35000.00 12.00 2.00 79.00 71.14 67.63 69.00 69.00 29.16 1.00 1.00 .00

.00 .00

.00 .00

.00 118.72 118.72 .69

.69 O.

0. 1900. 7. 6. 16.00 35000.00 11.00 4.00 78.00 70.78 67.52 71.00 29.16 29.16 1.00 1.00 .00

.00 .00

.00 .00

.00 117.40 117.40 .69

.69 O.

0. 1900. 7. 6. 17.00

17. 00 35000.00 10.00 2.00 77.00 70.39 67.39 73.00 29.14 2.00 2.00 .00

.00 .00

.00 .00

.00 116.69 116.69 .68

.68 O.

0. 1900. 7. 6. 18.00 25000.00 9.00 3.00 75.00 69.82 67.45 78.00 29.16 6.00 6.00 .00

.00 .00

.00 .00

.00 120.27 120.27 .68

.68 O.

0. 1900. 7. 6. 19.00 15000.00 8.00 3.00 74.00 67.65 64.50 73.00 29.15 10.00 .00

.00 .00

.00 .00

.00 131.12 131.12 .62

.62 O.

0. 1900. 7. 6. 20.00 15000.00 15.00 12.00 69.00 67.53 66.80 93.00 93.00 29.16 10.00 .00

.00 .00

.00 .00

.00 123.93 123.93 .66

.66 O.

0. 1900. 7. 6. 21.00 15000.00 2.00 3.00 69.00 66.89 65.83 90.00 29.16 29.16 10.00 .00

.00 .00

.00 .00

.00 123.93 123.93 .64

.64 O.

0. 1900.

1900. 7.

7. 6.

6. 22.00 7000.00 12.00 3.00 68.00 67.18 66.75 96.00 29.18 29.18 10.00 .00

.00 .00

.00 .00

.00 122.53 122.53 .66

.66 O.

0. 1900.

1900. 7.

7. 6.

6. 23.00 15000.00 10.00 3.00 67.00 66.19 65.75 96.00 96.00 29.19 29.19 7.00 7.00 .00

.00 .00

.00 37.84 37.84 112.17 112.17 .64

.64 O.

0. 1900.

1900. 7.

7. 7.

7. .00

.00 35000.00 9.00 3.00 68.00 66.55 66.55 65.80 65.80 93.00 93.00 29.19 29.19 2.00 2.00 .00

.00 .00

.00 102.32 102.32 105.44 105.44 .64

.64 O.

0. 1900.

1900. 7.

7. 7.

7. 1.00 35000.00 11.00 4.00 69.00 68.16 67.75 67.75 96.00 96.00 29.18 29.18 .00

.00 .00

.00 .00

.00 168.11 168.11 105.92 105.92 .69

.69 O.

0. 1900.

1900. 7.

7. 7.

7. 2.00 35000.00 12.00 7.00 71.00 68.83 67.81 90.00 90.00 29.18 29.18 2.00 2.00 .00

.00 .00

.00 220.81 220.81 109.08 109.08 .69

.69 O.

0. 1900.

1900. 7.

7. 7.

7. 3.00 35000.00 12.00 8.00 74.00 69.62 69.62 67.60 67.60 81.00 81.00 29.18 29.18 5.00 5.00 .00

.00 .00

.00 257.04 257.04 116.83 116.83 .69

.69 O.

0. 1900. 7. 7. 4.00 35000.00 13.00 6.00 77.00 71.18 68.61 68.61 76.00 76.00 29.18 29.18 7.00 7.00 .00

.00 .00

.00 278.44 278.44 125.56 125.56 .71

.71 O.

0. 1900. 7. 7. 5.00 35000.00 15.00 5.00 78.00 71.58 68.77 68 .77 74.00

74. 00 29.18 29.18 7.00 7.00 .00

.00 .00

.00 288.73 288.73 126.97 126.97 .72

.72 O.

0. 1900. 7. 7. 6.00 35000.00 14.00 4.00 80.00 71.20 67.24 67.24 66.00 66.00 29.18 29.18 6.00 6.00 .00

.00 .00

.00 285.11 285.11 127.18 127.18 .68

.68 O.

0. 1900. 7. 7. 7.00 25000.00 13.00 3.00 80.00 71.19 67.24 66.00 66.00 29.16 29.16 7.00 7.00 .00

.00 .00

.00 257.55 257.55 129.82 129.82 .68

.68 O.

0. 1900. 7. 7. 8.00 3500.00 7.00 3.00 81.00 72.94 69.54 69.00 69.00 29.15 29.15 7.00 7.00 .00

.00 .00

.00 216.92 216.92 131.27 131.27 .74

.74 O.

0. 1900. 7. 7. 9.00 4500.00 3.00 7.00 73.00 71.45 70.78 93.00 93.00 29.13 29.13 6.00 6.00 .00

.00 .00

.00 166.76 166.76 117.60 117.60 .76

.76 O.

0. 1900. 7. 7. 10.00

10. 00 3500.00 15.00 2.00 76.00 74.39 74.39 73.76 73.76 93.00 93.00 29.14 29.14 6.00 6.00 .00

.00 .00

.00 106.63 106.63 121.63 121.63 .84

.84 O.

0. 1900. 7. 7. 11.00

11. 00 4600.00 1.00 2.00 80.00 74.75 74 .75 72.70 72 .70 79.00 79.00 29.13 29.13 7.00 7.00 .00

.00 .00

.00 46.36 46.36 129.82 129.82 .82

.82 O.

0. 1900. 7. 7. 12.00

12. 00 6000.00 2.00 2.00 80.00 73.96 73.96 71.52 76.00 76.00 29.14 29.14 9.00 9.00 .00

.00 .00

.00 .00

.00 136.34 136.34 .78

.78 O.

0. 1900.

1900. 7.

7. 7.

7. 13.00 7500.00 11.00 2.00 79.00 72.23 69.32 73.00 73.00 29.16 29.16 6.00 6.00 .00

.00 .00

.00 .00

.00 125.77 125.77 .73

.73 O.

0. 1900.

1900. 7.

7. 7.

7. 14.00 35000.00 35000.00 9.00 1.00 77.00 72.45 70.53 81.00 81.00 29.16 29.16 2.00 2.00 .00

.00 .00

.00 .00

.00 116.69 116.69 .76

.76 O.

0. 1900. 7. 7. 15.00 35000.00 35000.00 9.00 2.00 74.00 71.74 70.78 70.78 90.00 90.00 29.18 29.18 1.00 1.00 .00

.00 .00

.00 .00

.00 112.26 112.26 .76

.76 O.

0. 1900. 7. 7. 16.00 35000.00 35000.00 10.00 3.00 73.00 73.00 71.45 71.45 70.78 70.78 93.00 93.00 29.18 29.18 1.00 1.00 .00

.00 .00

.00 .00

.00 111.01 111.01 .76

.76 O.

0. 1900. 7. 7. 17.00

17. 00 35000.00 9.00 3.00 71.00 70.14 69.75 96.00 96.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 108.35 108.35 .73

.73 O.

0. 1900. 7. 7. 18.00 35000.00 10.00 2.00 71.00 70.14 69.75 96.00 96.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 108.35 108.35 .73

.73 O. 1900.

0. 1900. 7.

7. 7. 19.00 35000.00 15.00 2.00 72.00 70.47 69.78 69.78 93.00 93.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 109.58 109.58 .74

.74 O.

0. 1900. 7. 7. 20.00 35000.00 9.00 1.00 72.00 69.80 68.80 90.00 90.00 29.17 29.17 .00

.00 .00

.00 .00

.00 .00

.00 109.58 109.58 .71

.71 O. 1900.

0. 1900. 7.

7. 7.

7. 21.00 35000.00 6.00 2.00 68.00 68.:'>0 68.30 67.97 100.00 100.00 29.17 29.17 .00

.00 .00

.00 .00

.00 .00

.00 104.72 104.72 .69

.69 O.

0. 1900.

1900. 7.

7. 7.

7. 22.00 35000.00 35000.00 6.00 2.00 67.00 67.00 66.96 100.00 100.00 29.17 29.17 .00

.00 .00

.00 .00

.00 .00

.00 103.54 103.54 .67

.67 O.

0. 1900.

1900. 7.

7. 7.

7. 23.00 35000.00 35000.00 7.00 2.00 68.00 67.18 66.75 66.75 96.00 96.00 29.18 29.18 .00

.00 .00

.00 .00

.00 39.81 39.81 104.72 104.72 .66

.66 O.

0. 1900.

1900. 7.

7. 8.

8. .00 35000.00 7.00 2.00 68.00 68.00 68.00 67.97 100.00 100.00 29.18 29.18 .00

.00 .00

.00 .00

.00 103.12 103.12 104.72 104.72 .69

.69 O. 1900.

0. 1900. 7.

7. 8. 1.00 35000.00 35000.00 6.00 2.00 71.00 71.00 70.98 100.00 100.00 29.18 29.18 .00

.00 .00

.00 .00

.00 166.27 166.27 108.35 108.35 .76

.76 O. 1900.

0. 1900. 7. 8. 2.00 35000.00 6.00 2.00 74.00 72.43 71.77 93.00 93.00 29.18 29.18 1.00 1.00 .00

.00 .00

.00 220.74 220.74 112.26 112.26 .79

.79 O. 1900.

0. 1900. 7.

7. 8. 3.00 35000.00 35000.00 6.00 5.00 76.00 73.69 72.76 90.00 90.00 29.17 29.17 1.00 1.00 .00

.00 .00

.00 264.79 264.79 114.81 114.81 .81

.81 O. 1900.

0. 1900. 7.

7. 8. 4.00 35000.00 35000.00 7.00 5.00 79.00 75.86 74.68 87.00 87.00 29.16 29.16 1.00 1.00 .00

.00 .00

.00 292.67 292.67 118.72 118.72 .87

.87 O. 1900.

0. 1900. 7. 8. 5.00 35000.00 35000.00 8.00 4.00 82.00 76.63 76.63 74.65 74.65 79.00 79.00 29.15 29.15 2.00 2.00 .00

.00 .00

.00 300.58 300.58 123.36 123.36 .87

.87 O. 1900.

0. 1900. 7.

7. 8.

8. 6.00 35000.00 35000.00 9.00 6.00 84.00 84.00 76.24 76.24 73.29 73.29 71.00 71.00 29.15 29.15 1.00 1.00 .00

.00 .00

.00 296.58 296.58 125.48 125.48 .83

.83 O. 1900.

0. 1900. 7.

7. 8.

8. 7.00 35000.00 35000.00 9.00 6.00 85.00 85.00 75.35 75.35 71.53 65.00 65.00 29.13 29.13 2.00 2.00 .00

.00 .00

.00 268.75 268.75 127.52 127.52 .79

.79 O. 1900.

0. 1900. 7.

7. 8.

8. 8.00 35000.00 35000.00 9.00 8.00 87.00 87.00 75.85 71.48 61.00 61.00 29.10 29.10 2.00 2.00 .00

.00 .00

.00 227.07 227.07 130.35 130.35 .79

.79 O. 1900.

0. 1900. 7.

7. 8.

8. 9.00 35000.00 35000.00 9.00 10.00 10.00 88.00 88.00 77.37 77.37 73.42 63.00 63.00 29.07 29.07 2.00 2.00 .00

.00 .00

.00 172.18 172.18 131.79 131.79 .84

.84 O. 1900.

0. 1900. 7.

7. 8.

8. 10.00 35000.00 35000.00 9.00 11.00 11.00 89.00 89.00 76.93 76.93 72.34 72.34 59.00 59.00 29.05 29.05 5.00 5.00 .00

.00 .00

.00 107.36 107.36 137.96 137.96 .81

.81 O. 1900.

0. 1900. 7.

7. 8.

8. 11.00 11.00 35000.00 35000.00 9.00 12.00 12.00 88.00 88.00 77.37 77.37 73.42 63.00 63.00 29.06 29.06 5.00 5.00 .00

.00 .00

.00 46.49 46.49 136.46 136.46 .84

.84 O. 1900.

0. 1900. 7.

7. 8.

8. 12.00 25000.00 25000.00 10.00 10.00 9.00 85.00 85.00 77.44 77 .44 74.68 74 .68 72.00 72.00 29.04 29.04 10.00 10.00 .00

.00 .00

.00 .00

.00 148.19 148.19 .87

.87 O. 1900.

0. 1900. 7.

7. 8.

8. 13.00 25000.00 25000.00 9.00 7.00 82.00 82.00 75.81

75. 81 73.45 73.45 76.00 76.00 29.06 29.06 10.00 10.00 .00

.00 .00

.00 .00

.00 143.36 143.36 .84

.84 O. 1900.

0. 1900. 7.

7. 8.

8. 14.00 14.00 5400.00 13.00 13.00 6.00 80.00 80.00 75.28 75.28 73.47 73.47 81.00 81.00 29.06 29.06 10.00 10.00 .00

.00 .00

.00 .00

.00 140.22 140.22 .84

.84 page 33 Page

LaSalle County Station Request for a License License Amendment to Technical Specification Specification 3.7.3, "Ultimate "Ultimate Heat Heat Sink" Sink" - Attachment 6 Station Year Month Day Year Month Day Hour Ceiling Wind Wind Drybulb Wetbulb DewPt. Humidity Press. Cloud Freezing Rain Solar Atmos. Press.

Partial Press.

(feet) Direc. V(knts) Temp(F) Temp(F) Temp(F) (%) (inHG) Cov(.1) Precip. Radiat. Radiat. Wat.Vap.(inHg)

(Btu/ft2/hr) (Btu/ft2/hr)

(Btu/ft2/hr) (Btu/ft2/hr) 1-30day_6am 29.07O.

0. 1900. 7. 8.

1900. 7. 8. 15.00 5400.00 9.00 9.00 77.00 74.66 73.75 90.00 29.07 10.00 .00

.00 .00

.00 .00

.00 135.61 135.61 .84

.84 O.

0. 1900. 7. 8.

1900. 7. 8. 16.00 15000.00 16.00 15000.00 9.00 6.00 78.00 76.35 75.75 93.00 29.07 29.07 10.00 .00

.00 .00

.00 .00

.00 137.13 137.13 .90

.90 O.

0. 1900. 7. 8.

1900. 7. 8. 17.00 15000.00 9.00 6.00 76.00 75.77 75.69 99.00 29.06 29.06 7.00 7.00 .00

.00 .00

.00 .00

.00 124.16 124.16 .90

.90 O. 1900. 7. 8.

0. 1900. 18.00 35000.00 35000.00 8.00 7.00 75.00 75.00 75.00 100.00 29.07 29.07 7.00 7.00 .00

.00 .00

.00 .00

.00 122.78 122.78 .88

.88 O. 1900. 7.

0. 1900. 7. 8.8. 19.00 35000.00 9.00 8.00 75.00 75.00 75.00 100.00 29.08 29.08 7.00 7.00 .00

.00 .00

.00 .00

.00 122.78 122.78 .88

.88 9.00 O. 1900. 7. 8.

0. 1900. 20.00 35000.00 35000.00 9.00 7.00 7.00 74.00 72.43 72.43 71.77 71.77 93.00 93.00 29.09 29.09 .00

.00 .00

.00 .00

.00 .00

.00 112.07 112.07 .79

.79 O. 1900. 7. 8.

0. 1900. 21.00 35000.00 21.00 35000.00 11.00 5.00 74.00 71.04 71.04 69.75 69.75 87.00 87.00 29.10 29.10 .00

.00 .00

.00 .00

.00 .00

.00 112.07 112.07 .74

.74 O. 1900. 7. 8.

0. 1900. 22.00 35000.00 35000.00 13.00 4.00 4.00 71.00 69.49 68.79 68.79 93.00 93.00 29.11 29.11 4.00 4.00 .00

.00 .00

.00 .00

.00 111.29 111.29 .71

.71 O. 1900. 7.

0. 1900. 7. 8.8. 23.00 35000.00 35000.00 13.00 4.00 4.00 69.00 68.16 67.75 67.75 96.00 96.00 29.14 29.14 6.00 6.00 .00

.00 .00

.00 36.59 36.59 112.40 112.40 .69

.69 O. 1900. 7. 9.

0. 1900. .00 35000.00 13.00 3.00 69.00 69.00 68.97 100.00 68.97 29.17 29.17 2.00 2.00 .00

.00 .00

.00 100.04 100.04 106.64 106.64 .71

.71 O.

0. 1900. 7. 9. 1.00 35000.00 35000.00 13.00 6.00 72.00 70.47 70.47 69.78 69.78 93.00 93.00 29.18 29.18 1.00 .00

.00 .00

.00 164.24 164.24 109.76 109.76 .74

.74 O. 1900. 7. 9.

0. 3.900. 2.00 35000.00 35000.00 13.00 6.00 75.00 71.29 71.29 69.67 69.67 84.00 84.00 29.20 29.20 1.00 .00

.00 .00

.00 220.88 220.88 113.53 113.53 .74

.74 O. 1900. 7. 9.

0. 1900. 3.00 35000.00 35000.00 13.00 7.00 77.00 72.45 72.45 70.53 70.53 81.00 81.00 29.21 29.21 1.00 .00

.00 .00

.00 265.15 265.15 116.10 116.10 .76

.76 O.

0. 1900. 7. 9.

1900. 7. 9. 4.00 35000.00 35000.00 14.00 9.00 80.00 72.05 72.05 68.58 68.58 69.00 69.00 29.23 29.23 1.00 .00

.00 .00

.00 295.10 295.10 120.05 120.05 .71

.71 O. 1900. 7. 9.

0. 1900. 5.00 35000.00 35000.00 14.00 11.00 82.00 71.20 71.20 66.28 66.28 60.00 60.00 29.24 29.24 .00

.00 .00

.00 .00

.00 310.39 310.39 122.53 122.53 .66

.66 O.

0. 1900. 7. 9.

1900. 7. 9. 6.00 35000.00 35000.00 14.00 13.00 83.00 70.82 70.82 65.15 65.15 56.00 56.00 29.25 29.25 .00

.00 .00

.00 .00

.00 302.97 302.97 123.89 123.89 .64

.64 O. 1900. 7. 9.

0. 1900. 7.00 35000.00 35000.00 14.00 12.00 83.00 71.45 71.45 66.20 66.20 58.00 29.25 29.25 .00

.00 .00

.00 .00

.00 275.99 275.99 123.89 123.89 .66

.66 O. 1900. 7. 9.

0. 1900. 8.00 35000.00 35000.00 14.00 12.00 84.00 71.03 71.03 64.99 64.99 54.00 54.00 29.25 29.25 .00 .00

.00 .00

.00 233.58 233.58 125.27 125.27 .63

.63 O.

0. 1900. 7. 9.

1900. 7. 9. 9.00 35000.00 35000.00 15.00 12.00 85.00 71.54 71.54 65.35 65.35 53.00 53.00 29.25 .00

.00 .00

.00 .00

.00 177.61 177.61 126.66 126.66 .64

.64 O. 1900. 7. 9.

0. 1900. 10.00 35000.00 35000.00 15.00 11.00 85.00 70.20 70.20 63.02 49.00 49.00 29.26 29.26 .00

.00 .00 .00 114.38 114.38 126.66 126.66 .59

.59 O.

0. 1900. 7. 9.

1900. 7. 9. 11.00 35000.00 35000.00 15.00 10.00 85.00 71.54 71.54 65.35 65.35 53.00 53.00 29.27 29.27 .00 .00 .00

.00 49.15 49.15 126.66 126.66 .64

.64 O.

0. 1900. 7. 9.

1900. 7. 9. 12.00 35000.00 35000.00 15.00 7.00 84.00 71.68 71.68 66.08 56.00 56.00 29.28 29.28 .00

.00 .00

.00 .00 .00

.00 125.27 125.27 .66

.66 O. 1900. 7. 9.

0. 1900. 13.00 35000.00 35000.00 15.00 4.00 82.00 71.81 71.81 67.26 67.26 62.00 62.00 29.29 29.29 .00 .00 .00 .00 122.53 122.53 .68

.68 O.

0. 1900. 7. 9.

1900. 7. 9. 14.00 35000.00 35000.00 13.00 2.00 78.00 72.11 69.58 69.58 76.00 29.31 .00 .00 .00 .00 117.20 117.20 .73

.73 O.

0. 1900. 7. 9.

1900. 7. 9. 15.00 35000.00 35000.00 12.00 1.00 76.00 71.51 69.55 81.00 81.00 29.33 .00 .00

.00 .00 .00 114.61 114.61 .73

.73 O.

0. 1900. 7. 9.

1900. 7. 9. 16.00 35000.00 35000.00 12.00 3.00 75.00 70.57 68.58 68.58 81.00 29.34 .00 .00 .00 .00 113.34 113.34 .71

.71 O.

0. 1900. 7. 9.

1900. 7. 9. 17.00 35000.00 12.00 5.00 75.00 70.57 68.58 81.00 29.35 29.35 .00 .00 .00 .00

.00 113.34 113.34 .71

.71 O.

0. 1900. 7. 9.

1900. 7. 9. 18.00 35000.00 12.00 4.00 74.00 69.63 67.60 67.60 81.00 29.36 29.36 .00 .00 .00 .00 112.07 112.07 .69

.69 O.

0. 1900. 7. 9. 19.00 35000.00 12.00 4.00 74.00 68.90 68.90 66.47 78.00 78.00 29.37 .00

.00 .00 .00 .00 112.07 112.07 .66

.66 O.

0. 1900. 7. 9.

1900. 7. 9. 20.00 35000.00 35000.00 13.00 5.00 72.00 68.44 68.44 66.73 84.00 29.39 .00 .00 .00 .00 109.58 109.58 .6~

.66 O. 1900. 7. 9.

0. 1900. 21.00 35000.00 35000.00 13.00 5.00 71.00 67.49 65.75 65.75 84.00 29.39 29.39 .00 .00

.00 .00

.00 .00 108.35 108.35 .64

.64 O.

0. 1900. 7. 9.

1900. 7. 9. 22.00 35000.00 35000.00 13.00 5.00 71.00 67.49 67.49 65.75 84.00 84.00 29.39 .00

.00 .00 .00 .00 108.35 108.35 .64

.64 O.

0. 1900. 7. 9.

1900. 7. 9. 23.00 35000.00 35000.00 13.00 3.00 70.00 67.20 67.20 65.81 65.81 87.00 29.41 29.41 .00 .00 .00 38.31 107.13 107.13 .64

.64 O.

0. 1900. 7. 10.

1900. 7. 10. .00 35000.00 13.00 3.00 71.00 68.83 67.81 67.81 90.00 29.43 29.43 .00 .00 .00

.00 101.46 101.46 108.35 108.35 .69

.69 O.

0. 1900. 7. 10.

1900. 7. 10. 1.00 35000.00 35000.00 14.00 3.00 74.00 71.05 69.75 87.00 87.00 29.44 .00 .00 .00 165.04 165.04 112.07 112.07 .74

.74 O. 1900. 7.

0. 1900. 7. 10. 2.00 35000.00 35000.00 14.00 3.00 78.00 71.59 68.77 74.00 29.45 .00 .00 .00 222.64 117.20 117.20 .72

.72 O. 1900. 7.

0. 1900. 7. 10. 3.00 35000.00 35000.00 13.00 3.00 81.00 71.53 71.53 67.27 64.00 29.45 .00 .00

.00 .00 268.54 268.54 121.18 121.18 .68

.68 O. 1900. 7.

0. 1900. 7. 10. 4.00 35000.00 35000.00 13.00 4.00 84.00 72.96 68.16 60.00 60.00 29.46 .00 .00 .00 297.51 125.27 125.27 .71

.71 O.

0. 1900. 7. 10.

1900. 7. 10. 5.00 35000.00 35000.00 12.00 3.00 86.00 73.73 68.47 57.00 57.00 29.46 .00

.00 .00 .00 308.50 308.50 128.06 128.06 .71

.71 O.

0. 1900. 7. 10.

1900. 7. 10. 6.00 35000.00 35000.00 11.00 4.00 87.00 73.92 73.92 68.33 68.33 55.00 29.46 29.46 .00 .00 .00

.00 300.62 300.62 129.47 129.47 .71

.71 O.

0. 1900. 7. 10.

1900. 7. 10. 7.00 35000.00 12.00 4.00 4.00 88.00 74.08 74.08 68.13 68.13 53.00 29.45 29.45 .00 .00

.00 .00 274.27 274.27 130.90 130.90 .71 O.

0. 1900. 7.7. 10. 8.00 35000.00 12.00 5.00 89.00 74.92 74.92 69.06 69.06 53.00 29.44 29.44 .00 .00

.00 .00 231.06 132.34 132.34 .73

.73

0. 1900. 7.

O. 10.

7. 10. 9.00 35000.00 12.00 7.00 89.00 73.14 66.06 48.00 48.00 29.43 .00

.00 .00 .00 176.47 176.47 132.34 132.34 .66

.66 O. 1900. 7.

0. 1900. 7. 10. 10.00 35000.00 35000.00 12.00 7.00 89.00 73.85 67.29 67.29 50.00 29.42 .00

.00 .00 .00 112.43 112.43 132.34 132.34 .69

.69 O.

0. 1900. 7.7. 10. 11.00 35000.00 12.00 6.00 88.00 75.43 70.34 57.00 57.00 29.42 29.42 .00 .00 .00 47.60 130.90 130.90 .76

.76 O. 1900. 7.

0. 1900. 7. 10. 12.00 35000.00 12.00 4.00 87.00 75.23 75.23 70.46 59.00 29.42 29.42 .00 .00

.00 .00 .00 129.47 129.47 .76

.76 O. 1900. 7.

0. 1900. 7. 10. 13.00 35000.00 13.00 2.00 85.00 75.98 75.98 72.47 67.00 29.42 29.42 .00 .00

.00 .00 .00 126.66 126.66 .81

.81 O. 1900. 7.

0. 1900. 10.

7. 10. 14.00 35000.00 11.00 3.00 84.00 75.67 75.67 72.41 69.00 69.00 29.43 1.00 .00 .00 .00 125.48 125.48 .81

.81 O.

0. 1900. 7.7. 10. 15.00 35000.00 35000.00 11.00 4.00 4.00 82.00 75.28 72.63 74.00 74.00 29.44 29.44 .00 .00 .00 .00

.00 122.53 122.53 .82

.82 O.

0. 1900. 7. 10. 16.00 35000.00 12.00 3.00 80.00 73.97 73.97 71.52 76.00 29.44 .00

.00 .00 .00 .00 119.84 119.84 .78

.78 O.

0. 1900. 7. 10.

1900. 7. 10. 17.00 35000.00 12.00 3.00 78.00 73.40 71.51 81.00 29.46 .00 .00 .00 .00 117.20 117.20 .78

.78 O.

0. 1900. 7. 10.

1900. 7. 10. 18.00 35000.00 10.00 2.00 76.00 72.98 71.73 87.00 29.45 .00 .00 .00 .00 114.61 114.61 .79 O.

0. 1900. 7. 10.

1900. 7. 10. 19.00 35000.00 10.00 3.00 75.00 72.72 71.77 90.00 29.44 .00 .00 .00 .00 113.34 113.34 .79 O.

0. 1900. 7. 10.

1900. 7. 10. 20.00 35000.00 10.00 3.00 74.00 71.75 70.78 90.00 29.44 .00 .00 .00 .00

.00 112.07 112.07 .76

.76 O.

0. 1900. 7. 10.

1900. 7. 10. 21. 00 35000.00 21.00 35000. 00 11.00 4.00 74.00 71.75 70.78 90.00 29.44 .00 .00 .00 .00 112.07 112.07 .76

.76 O.

0. 1900. 7. 10.

1900. 7. 10. 22.00 35000.00 35000.00 10.00 3.00 73.00 71.45 70.78 93.00 29.44 .00 .00 .00 .00 110.82 110.82 .76

.76 O.

0. 1900. 7. 10.

1900. 7. 10. 23.00 35000.00 10.00 3.00 73.00 70.09 68.77 87.00 29.45 .00 .00 .00 37.19 37.19 110.82 110.82 .71 O.

0. 1900. 7. 11. .00 35000.00 9.00 2.00 74.00 71.75 70.78 90.00 29.45 .00 .00 .00 99.95 112.07 112.07 .76

.76 O.

0. 1900. 7. 11.

1900. 7. 11. 1.00 35000.00 9.00 2.00 77.00 73.94 72.71 87.00 29.46 .00 .00 .00 163.25 163.25 115.90 115.90 .81

.81 O.

0. 1900. 7.7. 11. 2.00

2. 00 35000.00 10.00 4.00

4. 00 80.00 74.77 72.70 79.00 29.46 .00 .00 .00 220.26 119.84 119.84 .82

.82 75.83O.

0. 1900. 7. 11.

1900. 7. 11. 3.00 35600.00 35()00.00 11.00 4.00

4. 00 82.00 75.83 73.45 76.00 29.46 .00 .00 .00 264.91 122.53 122.53 .84 Page 44

LaSalle LaSalle County County Station Station Request Request forfor aa License License Amendment Amendment to to Technical Specification 3.7.3, "Ultimate Heat Sink" - Attachment Attachment 66 Station Year Station Year Month Month Day Day Hour Hour Ceiling Ceiling Wind Wind Wind Wind Drybuib Drybulb Wetbulb Wetbuib DewPt.

DewPt. Humidity Humidity Press.

Press. Cloud Cloud Freezing Freezing Rain Rain Solar Solar Atmos.

Atmos. Partial Partial Press.

Press.

(feet)

(feet) Direc.

Direc. V(knts)

V(knts) Temp(F)

Temp(F) Temp(F)

Temp(F) Temp(F)

Temp(F) (%)

(%) (inHG)

(inHG) Cov(.1)

Cov(.1) Precip.

Precip. Radial.

Radiat. Radiat. Wat.Vap.(inHg)

Radial. Wat.Vap.(inHg)

(Btu/ft2/hr) (Btu/ft2/hr)

(Btu/ft2/hr) (Btu/ft2/hr) 1-30day_6am 1-30day_6am 10.00 29.46O.

0. 1900.

1900. 7. 7. 11.

11. 4.00

4. 00 35000.00 35000.00 10.00 4.00 4.00 85.00 85.00 75.98 75.98 72.47 72.47 67.00 67.00 29.46 .00

.00 .00

.00 .00

.00 294.63 294.63 126.66 126.66 .81

.81

0. 1900.

O. 1900. 7.7. 11.

11. 5.00 5.00 35000.00 35000.00 9.00 9.00 4.00 4.00 86.00 86.00 76.26 76.26 72.48 72.48 65.00 65.00 29.45 29.45 1.00 1.00 .00

.00 .00

.00 302.66 302.66 128.27 128.27 .81

.81 1900. 7.

0. 1900.

O. 7. 11.

11. 6.00

6. 00 35000.00 35000.00 9.00 9.00 5.00 5.00 87.00 87.00 77.15 77.15 73.43 73.43 65.00 65.00 29.44 29.44 1.00

1. 00 .00

.00 .00

.00 294.31 294.31 129.69 129.69 .84

.84 63.00 1900. 7.

0. 1900.

O. 7. 11.

11. 7.00

7. 00 35000.00 35000.00 9.00 9.00 6.00 6.00 88.00 88.00 77.40 77.40 73.42 73.42 63.00 29.42 29.42 .00

.00 .00

.00 .00

.00 270.98 270.98 130.90 130.90 .84

.84 O.

0. 1900.

1900. 7. 7. 11.

11. 8.00

8. 00 35000.00 35000.00 9.00 9.00 6.00 6.00 89.00 89.00 76.97 76.97 72.34 72.34 59.00 59.00 29.42 29.42 .00

.00 .00

.00 .00

.00 228.85 228.85 132.34 132.34 .81

.81 1900. 7.

0. 1900.

O. 7. 11.

11. 9.00

9. 00 35000.00 35000.00 9.00 9.00 6.00 6.00 90.00 90.00 77.83 73.28 59.00 59.00 29.41 29.41 .00

.00 .00

.00 .00

.00 173.11 173.11 133.79 133.79 .84

.84

0. 1900.

O. 1900. 7. 11.

7. 11. 10.00

10. 00 35000.00 35000.00 9.00 9.00 6.00 6.00 90.00 90.00 77.83 73.28 59.00 29.40 29.40 .00

.00 .00

.00 .00

.00 110.01 110.01 133.79 133.79 .84

.84 59.00 1900. 7.

0. 1900.

O. 7. 11.

11. 11.00

11. 00 35000.00 35000.00 9.00 9.00 5.00 5.00 89.00 89.00 76.96 72.34 59.00 29.38 29.38 .00

.00 .00

.00 .00

.00 46.44 46.44 132.34 132.34 .81

.81

0. 1900.

O. 1900. 7. 7. 11.

11. 12.00

12. 00 35000.00 35000.00 9.00 9.00 4.00

4. 00 88.00 88.00 77.40 73.42 63.00 63.00 29.38 29.38 .00

.00 .00

.00 .00

.00 .00

.00 130.90 130.90 .84

.84 9.00 O. 1900. 7.

0. 1900. 7. 11.

11. 13.00

13. 00 35000.00 35000.00 9.00 3.00 3.00 86.00 86.00 76.87 73.42 67.00 29.38 29.38 .00

.00 .00

.00 .00

.00 .00

.00 128.06 128.06 .84

.84

0. 1900.

O. 1900. 7. 7. 11.

11. 14.00

14. 00 35000.00 35000.00 9.00 2.00 85.00 75.98 72.47 67.00 29.38 29.38 .00

.00 .00

.00 .00

.00 .00

.00 126.66 126.66 .81

.81 9.00 O.

0. 1900.

1900. 7. 7. 11.

11. 15.00

15. 00 35000.00 35000.00 9.00 4.00 82.00 75.27 72.63 74.00 29.39 29.39 .00

.00 .00

.00 .00

.00 .00

.00 122.53 122.53 .82

.82

0. 1900.

O. 1900. 7. 7. 11.

11. 16.00

16. 00 35000.00 9.00 5.00 80.00 75.29 73.46 81.00 29.39 29.39 .00

.00 .00

.00 .00

.00 .00

.00 119.84 119.84 .84

.84

0. 1900.

O. 1900. 7. 7. 11.

11. 17.00

17. 00 35000.00 35000.00 9.00 4.00 78.00 74.16 72.62 84.00 29.38 29.38 .00

.00 .00

.00 .00

.00 .00

.00 117.20 117.20 .81

.81 O. 1900. 7.

0. 1900. 7. 11.

11. 18.00

18. 00 35000.00 35000.00 9.00 4.00 77.00 73.20 71.64 84.00 29.37 29.37 .00

.00 .00

.00 .00

.00 .00

.00 115.90 115.90 .79

.79 87.00 0. 1900.

O. 1900. 7. 7. 11.

11. 19.00

19. 00 35000.00 35000.00 9.00 4.00 76.00 72.98 71.73 87.00 29.36 29.36 .00

.00 .00

.00 .00

.00 .00

.00 114.61 114.61 .79

.79

0. 1900.

O. 1900. 7. 7. 11.

11. 20.00

20. 00 35000.00 35000.00 9.00 4.00 75.00 72.72 71.77 90.00 29.37 29.37 .00

.00 .00

.00 .00

.00 .00

.00 113.34 113.34 .79

.79

0. 1900.

O. 1900. 7. 7. 11.

11. 21.00 35000.00 21.00 35000.00 10.00 4.00 74.00 72.43 71.77 93.00 29.37 29.37 .00

.00 .00

.00 .00

.00 .00

.00 112.07 112.07 .79

.79

0. 1900.

O. 1900. 7. 7. 11.

11. 22.00

22. 00 35000.00 35000.00 10.00 4.00 73.00 71.45 70.78 93.00 29.37 29.37 .00

.00 .00

.00 .00

.00 .00

.00 110.82 110.82 .76

.76

0. 1900.

O. 1900. 7. 7. 11.

11. 23.00

23. 00 35000.00 35000.00 10.00 4.00 73.00 71.45 70.78 93.00 29.38 29.38 .00

.00 .00

.00 .00

.00 36.20 36.20 110.82 110.82 .76

.76

0. 1900.

O. 1900. 7.7. 12.

12. .00

.00 35000.00 35000.00 10.00 3.00 73.00 72.12 71.74 96.00 29.39 29.39 .00

.00 .00

.00 .00

.00 98.90 98.90 110.82 110.82 .79

.79 93.000. 1900.

O. 1900. 7. 7. 12.

12. 1.00 35000.00 1.00 35000.00 11.00 3.00 75.00 73.41 72.77 93.00 29.40 29.40 .00

.00 .00

.00 .00

.00 162.45 162.45 113.34 113.34 .81

.81

0. 1900.

O. 1900. 7. 7. 12.

12. 2.00 35000.00

2. 00 35000.00 9.00 5.00 78.00 74.16 72.62 84.00 29.40 29.40 .00

.00 .00

.00 .00

.00 219.56 219.56 117.20 117.20 .81

.81

0. 1900.

O. 1900. 7. 7. 12.

12. 3.00 35000.00

3. 00 35000.00 10.00 6.00 82.00 76.64 74.65 79.00 29.40 29.40 .00

.00 .00

.00 .00

.00 263.62 263.62 122.53 122.53 .87

.87

0. 1900.

O. 1900. 7. 12.

7. 12. 4.00 35000.00

4. 00 35000.00 11.00 6.00

6. 00 85.00 77.46 74.68 72.00 29.40 29.40 .00

.00 .00

.00 .00

.00 292.78 292.78 126.66 126.66 .87

.87

0. 1900.

O. 1900. 7.7. 12.

12. 5.00 35000.00 5.00 35000.00 10.00 6.00 87.00 77.77 74.37 67.00 29.38 29.38 1.00 1.00 .00

.00 .00

.00 300.97 300.97 129.69 129.69 .87

.87

0. 1900.

O. 1900. 7. 7. 12.

12. 6.00 35000.00 6.00 35000.00 10.00 6.00 88.00 76.09 71.40 71.40 59.00 59.00 29.36 29.36 1.00 1.00 .00

.00 .00

.00 294.65 294.65 131.12 131.12 .79

.79

0. 1900.

O. 1900. 7. 7. 12.

12. 7.00 35COO.00

7. 00 35000.00 9.00 6.00 89.00 76.96 72.34 59.00 59.00 29.34 29.34 1.00 1.00 .00

.00 .00

.00 268.05 268 .05 132.56 132.56 .81

.81 53.000. 1900.

O. 1900. 7. 7. 12.

12. 8.00 35000.00 8.00 35000.00 9.00 5.00 90.00 75.74 69.98 53.00 29.32 29.32 1.00 1.00 .00

.00 .00

.00 226.76 226.76 134.02 134.02 .75

.75

0. 1900.

O. 1900. 7.7. 12.

12. 9.00 35000.00 9.00 35000.00 9.00 6.00 90.00 76.44 71.11 55.00 55.00 29.30 29.30 2.00

2. 00 .00

.00 .00

.00 169.55 169.55 134.70 134.70 .78

.78

0. 1900.

O. 1900. 7. 7. 12.

12. 10.00

10. 00 35000.00 35000.00 9.00 5.00 90.00 76.44 71.11 55.00 55.00 29.30 29.30 4.00

4. 00 .00

.00 .00

.00 105.26 105.26 137.43 137.43 .78

.78

0. 1900.

O. 1900. 7.7. 12.

12. 11.00 35000.00 11.00 35000.00 9.00 9.00 6.00 89.00 75.59 70.18 70.18 55.00 55.00 29.29 29.29 7.00 7.00 .00

.00 .00

.00 42.61 42.61 143.36 143.36 .76

.76

0. 1900.

O. 1900. 7. 7. 12.

12. 12.00 35000.00

12. 00 35000.00 9.00 9.00 4.00 86.00 76.25 72.48 65.00 65.00 29.30 29.30 9.00 9.00 .00

.00 .00

.00 .00

.00 145.69 145.69 .81

.81 67.000. 1900.

O. 1900. 7. 7. 12.

12. 13.00 35000.00

13. 00 35000.00 9.00 9.00 4.00 85.00 75.97 72.47 67.00 29.30 29.30 7.00 7.00 .00

.00 .00

.00 .00

.00 137.21 137.21 .81

.81

0. 1900.

O. 1900. 7. 7. 12.

12. 14.00 25000.00

14. 00 25000.00 9.00 9.00 4.00 82.00 75.27 72.63 74.00 74.00 29.30 29.30 6.00 6.00 .00

.00 .00

.00 .00

.00 130.03 130.03 .82

.82

0. 1900. 7.

O. 1900. 7. 12. 12. 15.00 25000.00 15.00 25000.00 9.00 9.00 5.00 81.00 75.70 73.67 79.00 79.00 29.31 29.31 7.00 7.00 .00

.00 .00

.00 .00

.00 131.27 131.27 .84

.84

0. 1900. 7.

O. 1900. 7. 12. 12. 16.00

16. 25000.00 00 25000.00 9.00 9.00 5.00 79.00 69.76 65.37 65.37 64.00 64.00 29.33 29.33 9.00 9.00 .00

.00 .00

.00 .00

.00 134.84 134.84 .64

.64 0.

O. 1900.

1900. 7. 7. 12.

12. 17.00

17. 8500.00 00 8500.00 10.00 10.00 5.00 78.00 69.98 66.23 68.00 29.35 29.35 10.00

10. 00 .00

.00 .00

.00 .00

.00 137.13 137.13 .66

.66

0. 1900. 7.

O. 1900. 7. 12. 12. 18.00 12000.00

18. 00 12000.00 13.00 13.00 8.00 77.00 71.19 68.61 76.00 76.00 29.35 29.35 6.00 6.00 .00

.00 .00

.00 .00

.00 123.00 123.00 .71

.71 0.

O. 1900.

1900. 7. 7. 12.

12. 19.00

19. 12000.00 00 12000.00 15.00 15.00 10.00 10.00 73.00 70.09 68.77 87.00 87.00 29.33 29.33 6.00 6.00 .00

.00 .00

.00 .00

.00 117.60 117.60 .71

.71

0. 1900. 7.

O. 1900. 7. 12. 12. 20.00 11000.00 20.00 110 00.00 1.00 1.00 6.00 71.00 69.49 68.79 93.00 93.00 29.33 29.33 8.00 8.00 .00

.00 .00

.00 .00

.00 120.13 120.13 .71

.71

0. 1900. 7.

O. 1900. 7. 12. 12. 21.00 21.00 4100.00 4100.00 6.00 6.00 4.00 4.00 70.00 70.00 69.16 69.16 68.75 68.75 96.00 96.00 29.35 29.35 10.00

10. 00 .00

.00 .00

.00 .00

.00 125.34 125.34 .71

.71 0.

O. 1900.

1900. 7. 7. 12.

12. 22.

22.00 7900.00 00 7900.00 11.00 11.00 3.00 3.00 69.00 69.00 69.00 69.00 68.97 100.00 68.97 100.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 .00

.00 123.93 123.93 .71

.71

0. 1900. 7.

O. 1900. 7. 12. 12. 23.00 7900.00

23. 00 7900.00 11.00 11.00 5.00 5.00 69.00 69.00 68.17 68.17 67.75 67.75 96.00 96.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 30.37 30.37 123.93 123.93 .69

.69 0.

O. 1900.

1900. 7. 7. 13.

13. .00 7900.00

.00 7900.00 10.00 10.00 3.00 3.00 70.00 70.00 69.16 69.16 68.75 68.75 96.00 96.00 29.33 29.33 8.00 8.00 .00

.00 .00

.00 90.86 90.86 118.78 118.78 .71

.71

0. 1900. 7.

O. 1900. 7. 13. 13. 1.

1.00 12900.00 00 12900.00 9.00 9.00 4.00 4.00 71.00 71.00 70.14 70.14 69.75 69.75 96.00 96.00 29.35 29.35 7.00 7.00 .00

.00 .00

.00 151.28 151.28 117.37 117.37 .73

.73 0.

O. 1900.

1900. 7. 7. 13.

13. 2.00

2. 12900.00 00 12900.00 11.00 11.00 6.00 6.00 72.00 72.00 70.47 70.47 69.78 69.78 93.00 93.00 29.36 29.36 7.00

7. 00 .00

.00 .00

.00 204.58 204.58 118.70 118.70 .74

.74

0. 1900. 7.

O. 1900. 7. 13. 13. 3.00 12900.00

3. 00 12900.00 13.00 13.00 7.00 7.00 74.00 74.00 71.75 71.75 70.78 70.78 90.00 90.00 29.37 29.37 7.00 7.00 .00

.00 .00

.00 246.22 246.22 121.41 121.41 .76

.76

0. 1900. 7.

O. 1900. 7. 13. 13. 4.

4.00 25000.00 00 25000.00 14.00 14.00 5.00 5.00 76.00 76.00 71.S1 71.51 69.55 69.55 81.00 81.00 29.38 29.38 7.00 7.00 .00

.00 .00

.00 274.07 274.07 124.16 124.16 .73

.73 81.000.

O. 1900.

1900. 7. 7. 13.

13. 5.00 12900.00 5.00 12900.00 15.00 15.00 5.00 5.00 77.00 77.00 72.46 72.46 70.53 70.53 81.00 29.38 29.38 9.00 9.00 .00

.00 .00

.00 277.83 277.83 131.86 131.86 .76

.76

0. 1900. 7.

O. 1900. 7. 13. 13. 6.00 12900.00 6.00 12900.00 14.00 14.00 5.00 5.00 78.00 78.00 72.89 72.89 70.75 70.75 79.00 79.00 29.38 29.38 99.00

.00 .00

.00 .00

.00 270.44 270.44 133.34 133.34 .76

.76 76.000. 1900. 7.

O. 1900. 7. 13. 13. 7.

7.00 12900.00 00 12900.00 15.00 15.00 6.00 6.00 79.00 79.00 73.04 73.04 70.55 70.55 76.00 29.35 29.35 9.00 9.00 .00

.00 .00

.00 246.42 246.42 134.84 134.84 .76

.76 0.

O. 1900.

1900. 7. 7. 13.

13. 8.00 12900.00 8.00 12900.00 15.00 15.00 6.00 6.00 80.00 80.00 72.61 72.61 69.44 69.44 71.00 71.00 29.34 29.34 7.00 7.00 .00

.00 .00

.00 212.41 212.41 129.82 129.82 .73

.73

0. 1900. 7.

O. 1900. 7. 13. 13. 9.00 25000.00

9. 00 25000.00 15.00 15.00 6.00 6.00 81.00 81.00 73.52 73.52 70.40 70.40 71.00 71.00 29.33 29.33 9.00 9.00 .00

.00 .00

.00 156.80 156.80 137.87 137.87 .76

.76 0.

O. 1900.

1900. 7. 7. 13.

13. 10.

10.0000 25000.00 25000.00 16.00 16.00 4.00 4.00 82.00 82.00 73.28 73.28 69.60 69.60 67.00 67.00 29.32 29.32 9.00

9. 00 .00

.00 .00

.00 99.22 99 .22 139.40 139.40 .74

.74

0. 1900. 7.

O. 1900. 7. 13. 13. 11.00 12000.00 11.00 12500.00 16.00 16.00 4.00 4.00 82.00 82.00 73.86 73.86 70.50 70.50 69.00 69.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 38.10 38.10 143.36 143.36 .76

.76

0. 1900. 7.

O. 1900. 7. 13. 13. 12. 00 12.00 12900.00 12900.00 1.00 1.00 3.00 3.00 81.00 81.00 74.35 74.35 71.67 71.67 74.00 74.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 .00

.00 141.78 141.78 .79

.79

0. 1900. 7.

O. 1900. 7. 13. 13. 13.

13.00 12900.00 00 12900.00 16.00 16.00 4.00 4.00 80.00 80.00 70.64 70.64 66.32 66.32 64.00 64.00 29.35 29.35 10.00 10.00 .00

.00 .00

.00 .00

.00 140.22 140.22 .66

.66

0. 1900. 7.

O. 1900. 7. 13. 13. 14.00 12900.00

14. 00 12900.00 16.00 16.00 3.00 3.00 79.00 79.00 70.32 70.32 66.29 66.29 66.00 66.00 29.36 29.36 10.00 10.00 .00

.00 .00

.00 .00

.00 138.66 138.66 .66

.66

0. 1900. 7.

O. 1900. 7. 13. 13. 15.00 12900.00 15.00 12900.00 2.00 2.00 5.00 5.00 78.00 78.00 70.79 70.79 67.52 67.52 71.00 71.00 29.36 29.36 10.00 10.00 .00

.00 .00

.00 .00

.00 137.13 137.13 .69

.69

0. 1900. 7.

O. 1900. 7. 13. 13. 16.

16.00 12900.00 00 12900.00 4.00 4.00 9.00 9.00 75.00 75.00 70.57 70.57 68.58 68.58 81.00 81.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 .00

.00 132.60 132.60 .71

.71 page 55 Page

LaSalle County Station Request for a License Amendment to Technical Specification LaSalle Specification 3.7.3, 3.7.3, "Ultimate "Ultimate Heat Heat Sink" Sink" -- Attachment Attachment 66 Station Year Month Station Month Day Hour Ceiling Wind Wind Drybulb WetbJlb Wetbulb DewPt. Humidity Press. Cloud Freezing Rain Solar Atmos. Partial Press.

(feet) Direc. V(knts) Temp(F) Temp(F) Temp(F) (%) (inHG) Cov(.1) Precip. Radial.

Radiat. Radiat. Wal.Vap.(inHg)

Radial. Wat.Vap.(inHg)

(Btu/ft2/hr) (Btu/ft2/hr)

(Btu/ft2/hr) (Btu/ft2/hr) 1-30day_6am 1-30day_6am

0. 1900. 7. 13.

O. 17.00 12900.00 5.00 10.00 73.00 70.09 70.09 68.77 68.77 87.00 87.00 29.36 29.36 10.00 10.00 .00

.00 .00

.00 .00

.00 129.66 129.66 .71

.71

0. 1900.O. 1900.

7. 7.13.13. 18.00 12900.00 5.00 8.00 72.00 70.47 69.78 93.00 93.00 29.36 29.36 10.00 10.00 .00

.00 .00

.00 .00

.00 128.20 128.20 .74

.74 O.

0. 1900. 7. 13.

1900. 7. 13. 19.00 12900.00 5.00 7.00 71.00 70.14 69.75 96.00 96.00 29.35 29.35 10.00 10.00 .00

.00 .00

.00 .00

.00 126.77 126.77 .73

.73

0. 1900.O. 1900.

7. 7.13.13. 20.00 12900.00 5.00 6.00 70.00 69.79 69.67 69.67 99.00 99.00 29.35 29.35 10.00 10.00 .00

.00 .00

.00 .00

.00 125.34 125.34 .73

.73 O.

0. 1900. 7. 13.

1900. 7. 13. 21.00 12900.00 5.00 6.00 70.00 70.00 69.79 69.79 69.67 99.00 29.36 29.36 10.00 .00

.00 .00

.00 .00

.00 125.34 125.34 .73

.73

0. 1900.O. 1900.

7. 7.13.13. 22.00 8500.00 5.00 7.00 70.00 69.79 69.67 99.00 29.36 29.36 10.00 10.00 .00

.00 .00

.00 .00

.00 125.34 125.34 .73

.73 O.

0. 1900. 7. 13.

1900. 7. 13. 23.00 8500.00 5.00 7.00 70.00 69.79 69.79 69.67 99.00 99.00 29.38 29.38 10.00 .00

.00 .00

.00 29.51 29.51 125.34 125.34 .73

.73 O.

0. 1900. 7. 14.

1900. 7. 14. .00

.00 11000.00 11000.00 5.00 4.00 69.00 69.00 68.97 100.00 29.38 29.38 10.00 10.00 .00

.00 .00

.00 83.17 83.17 123.93 123.93 .71

.71

0. 1900.o. 1900.

7. 7.14.14. 1. 00 11000.

1.00 11000.00 00 6.00 3.00 70.00 70.00 69.98 100.00 29.39 10.00 10.00 .00

.00 .00

.00 137.49 137.49 125.34 125.34 .74

.74 O.

0. 1900. 7. 14.

1900. 7. 14. 2.00 7900.00 6.00 3.00 70.00 70.00 69.98 100.00 29.39 29.39 10.00 .00

.00 .00

.00 186.23 186.23 125.34 125.34 .74

.74

0. 1900. 7.

O. 7. 14. 3.00 7900.00 6.00 3.00 71.00 71.00 70.98 100.00 29.39 29.39 10.00 .00

.00 .00

.00 224.30 224.30 126.77 126.77 .76

.76

o. 1900. 7. 14.

0. 1900. 7. 14. 4.00 7900.00 6.00 2.00 73.00 72.12 71.74 96.00 29.39 29.39 10.00 .00

.00

.00

.00

.00

.00 248.91 248.91 257.87 129.66 129.66 134.10

.79

.79

.81

0. 1900. 7.

O. 7. 14. 5.00 7900.00 14.00 2.00 76.00 73.69 72.76 90.00 29.39 29.39 10.00 10.00 .00 .00 257.87 134.10 .81

0. 1900.O. 1900.

7. 7.14.14. 6.00 7900.00 14.00 3.00 76.00 73.69 72.76 90.00 29.39 29.39 10.00 .00

.00 .00

.00 251.05 251.05 134.10 134.10 .81

.81

0. 1900. 7.

O. 7. 14. 7. 00 7900.00 7.00 16.00 3.00 75.00 72.72 71.77

71. 77 90.00 90.00 29.38 10.00 .00

.00 .00

.00 228.95 228.95 132.60 132.60 .79

.79 O.

0. 1900. 7.

7. 14. 8.00

8. 00 7900.00 1.00 4.00 74.00 73.11 73 .11 72.74

72. 74 96.00 29.35 29.35 10.00 .00

.00 .00

.00 192.17 192 .17 131.12 131.12 .81

.81

0. 1900.O. 1900.

7. 7.14.14. 9.00 12900.00 2.00 3.00 74.00 73.11 72.74 96.00 29.33 10.00 .00

.00 .00

.00 144.95 144.95 131.12 131.12 .81

.81 O.

0. 1900. 7. 14. 10.00 12900.00 3.00 2.00 74.00 72.43 71.77 93.00 29.31 29.31 10.00 .00

.00 .00

.00 91.36 91.36 131.12 131.12 .79

.79 O. 1900.

0. 1900. 7.

7. 14.

14. 11. 00 12900.00 11.00 5.00 5.00 75.00 72.72 71.77 90.00 29.31 10.00 10.00 .00

.00 .00

.00 37.13 37.13 132.60 132.60 .79

.79

0. 1900. 7. 7.14.

O. 1900. 14. 12.00 5400.00 5.00 5.00 74.00 71.75 70.78 90.00 90.00 29.31 29.31 10.00 .00

.00 .00

.00 .00

.00 131.12 131.12 .76

.76 o.

0. 1900. 7. 14.

1900. 7. 14. 13.00 15000.00 5.00 3.00 73.00 72.12 71.74 96.00 29.30 29.30 10.00 10.00 .00

.00 .00

.00 .00

.00

.00 129.66 129.66 131.12

.79

.79

.79

0. 1900.O. 1900.

7. 7.14.14. 14.00 15000.00 15000.00 5.00 4.00 74.00 72.43 71.77 71.77 93.00 93.00 29.32 29.32 10.00 10.00 .00

.00 .00

.00 .00 131.12 .79 o.

0. 1900. 7. 14.

1900. 7. 14. 15.00 7900.00 6.00 4.00 73.00 72.12 72 .12 71.74

71. 74 96.00 96.00 29.33 29.33 10.00 .00

.00 .00

.00 .00

.00

.00 129.66 129.66 128.20

.79

.79

.76 O.

0. 1900. 7.7. 14. 16.00 15000.00 7.00 4.00 72.00 71.13 71.13 70.74 70.74 96.00 96.00 29.33 29.33 10.00 .00

.00 .00

.00 .00 128.20 .76

0. o. 1900. 7.

1900. 7. 14. 17.00

17. 00 15000.00 6.00 6.00 71.00 71.00 70.98 100.00 29.34 29.34 10.00 .00

.00 .00

.00 .00

.00

.00 126.77 126.77 125.34

.76

.76

.74 O.

0. 1900. 7. 14.

1900. 7. 14. 18.00 25000.00 7.00 6.00 70.00 70.00 70.00 69.98 69.98 100.00 100.00 29.33 29.33 10.00 .00

.00 .00

.00 .00 125.34 .74 O.

0. 1900. 7.7. 14. 19.00 11000.00 7.00 4.00 70.00 70.00 69.98 100.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 .00

.00 125.34 125.34 .74

.74 O.

0. 1900. 7.7. 14. 20.00 4100.00 8.00 3.00 70.00 70.00 70.00 69.98 100.00 100.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 .00

.00 125.34 125.34 .74

.74 O.

0. 1900. 7.7. 14. 21.00 7900.00 7.00 4.00 70.00 70.00 69.98 100.00 29.32 29.32 10.00 10.00 .00

.00 .00

.00 .00

.00 125.34 125.34 .74

.74 O.

0. 1900. 7. 14. 22.00 7900.00 11.00 4.00 70.00 70.00 69.98 100.00 29.33 29.33 10.00 .00

.00 .00

.00 .00

.00 125.34 125.34 .74

.74 O.

0. 1900. 7. 14. 23.00 7900.00 8.00 1.00 70.00 70.00 69.98 100.00 29.33 29.33 10.00 .00

.00 .00

.00 28.81 28.81 125.34 125.34 .74

.74

0. 1900.O. 1900.

7. 7.15.15. .00 7900.00 8.00 3.00 70.00 70.00 69.98 69.98 100.00 100.00 29.32 29.32 10.00 10.00 .00

.00 .00

.00 82.26 82.26 125.34 125.34 .74

.74 O.

0. 1900.

1900. 7.7. 15.

15. 1.00 3700.00 7.00 4.00 71.00 71.00 70.98 100.00 100.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 136.52 136.52 126.77 126.77 .76

.76

0. 1900.O. 1900.

7. 7.15.15. 2.00 1400.00 7.00 4.00 71.00 71.00 71.00 70.98 100.00 100.00 29.36 29.36 10.00 10.00 .00

.00 .00

.00 185.22 185.22 126.77 126.77 .76

.76 O.

0. 1900. 7.

7. 15. 3.00 400.00 6.00 4.00 72.00 72.00 71.99 100.00 29.35 29.35 10.00 .00

.00 .00

.00 223.26 223.26 128.20 128.20 .79

.79

0. O. 1900. 7.

1900. 7. 15. 4. 00 1800.00 4.00 7.00 4.00 72.00 72.00 71.99 100.00 29.33 29.33 10.00 .00

.00 .00

.00 248.17 248.17 128.20 128.20 .79

.79 O.

0. 1900. 7. 15. 5.00 3300.00 8.00 4.00 72.00 72.00 71.99 100.00 100.00 29.35 29.35 10.00 10.00 .00

.00 .00

.00 257.56 257.56 128.20 128.20 .79

.79 O.

0. 1900. 7. 15. 6.00 1400.00 8.00 6.00 74.00 73.11 72.74 96.00 96.00 29.35 29.35 10.00 10.00 .00

.00 .00

.00 250.37 250.37 131.12 131.12 .81

.81 o.

0. 1900. 7.7. 15. 8~00.00 7.00 8x00.00 8.00 4.00 75.00 73.41 72.77 93.00 93.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 227.81 227.81 132.60 132.60 .81

.81 o.

0. 1900.

1900. 7.7. 15.

15. 8.00 8500.00 10.00 3.00 77.00 75.37 74.76 93.00 93.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 190.64 190.64 135.61 135.61 .87

.87 O.

0. 1900. 7.7. 15. 9.00

9. 00 9800.00 10.00 5.00 78.00 76.12 76 .12 75.42

75. 42 92.00 92.00 29.32 29.32 10.00 10.00 .00

.00 .00

.00 143.29 143.29 137.13 137.13 .89

.89 O.

0. 1900.

1900. 7.7. 15.

15. 10.00 10000.00 11.00 4.00 78.00 75.63 74.74 74.74 90.00 90.00 29.31 29.31 10.00 10.00 .00

.00 .00

.00 89.84 89.84 137.13 137.13 .87

.87

0. 1900.O. 1900.

7. 7.15.15. 11.00 9500.00 14.00 5.00 77.00 75.37 75.37 74.76 74.76 93.00 93.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 35.96 35.96 135.61 135.61 .87

.87 O.

0. 1900. 7.7. 15. 12.00 12300.00 12900.00 13.00 3.00 76.00 75.09 75.09 74.74 74.74 96.00 96.00 29.32 29.32 10.00 10.00 .00

.00 .00

.00 .00

.00 134.10 134.10 .87

.87

0. O. 1900. 7. 15.

1900. 13.00

13. 00 12900.00 9.00 3.00 75.00 75.00 75.00 100.00 100.00 29.32 29.32 10.00 10.00 .00

.00 .00

.00 .00

.00 132.60 132.60 .88

.88 O. 1900. 7.

0. 1900. 7. 15. 14.00

14. 00 15000.00 11.00 3.00 74.00 74.00 73.99 73.99 100.00 100.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 .00

.00 131.12 131.12 .85

.85 O. 1900. 7. 15.

0. 1900. 15.00 8x00.00 8900.00 10.00 2.00 74.00 74.00 73.99 73.99 100.00 100.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 .00

.00 131.12 131.12 .85

.85

0. O. 1900. 7. 15.

1900. 16.00

16. 00 15000.00 10.00 2.00 74.00 73.78 73.68 99.00 99.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 .00

.00 131.12 131.12 .84

.84 O.

0. 1900.

1900. 7.7. 15.

15. 17.00 15000.00 10.00 2.00 74.00 73.78 73.68 73.68 99.00 99.00 29.34 29.34 10.00 10.00 .00

.00 .00

.00 .00

.00 131.12 131.12 .84

.84

0. O. 1900. 7.

1900. 15.

7. 15. 18.00

18. 00 15000.00 12.00 2.00 74.00 73.78 73.68 99.00 99.00 29.34 29.34 10.00 10.00 .00

.00 .00

.00 .00

.00 131.12 131.12 .84

.84 O. 1900. 7. 15.

0. 1900. 15. 19.00 15000.00 11.00 2.00 74.00 73.78 73.68

73. 68 99.00 99.00 29.34 29 .34 10.00

10. 00 .00

.00 .00

.00 .00

.00 131.12 131.12 .84

.84

0. 1900.o. 1900.

7. 7.15.15. 20.00 8900.00 20.00 10.00 2.00 73.00 73.00 72.99 100.00 100.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 .00

.00 129.66 129.66 .82

.82 O. 1900.

0. 1900. 7.7. 15.

15. 21.00 1000.00 21.00 1000.00 12.00 12.00 2.00 73.00 73.00 72.99 72.99 100.00 100.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 .00

.00 129.66 129.66 .82

.82

0. 1900.O. 1900.

7. 7.15.15. 22.00 1000.00 22.00 1000.00 9.00 3.00 73.00 73.00 72.99 72.99 100.00 100.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 .00

.00 129.66 129.66 .82

.82 O. 1900.

0. 1900. 7.7. 15.

15. 8500.00 23.00 8500.00 8.00 2.00 72.00 72.00 71.99 71.99 100.00 100.00 29.35 29.35 10.00 10.00 .00

.00 .00

.00 27.95 27.95 128.20 128.20 .79

.79 O. 1900.

0. 1900. 7.7. 16.

16. .00 8500.00

.00 8500.00 9.00 3.00 3.00 72.00 72.00 71.99 71.99 100.00 100.00 29.36 29.36 10.00 10.00 .00

.00 .00

.00 81.13 81.13 128.20 128.20 .79

.79 O. 1900.

0. 1900. 7.7. 16.

16. 1. 00 12900.00 1.00 12")00.00 11.00 11.00 2.00 73.00 73.00 72.99 72.99 100.00 100.00 29.37 29.37 10.00 10.00 .00

.00 .00

.00 135.22 135.22 129.66 129.66 .82

.82 O. 1900.

0. 1900. 7.7. 16.

16. 12700.00 2.00 12700.00 13.00 13.00 3.00 3.00 74.00 73.78 73.68 73 .68 99.00 99 .00 29.37 29.37 10.00 10.00 .'.)0

.00 .00

.00 183.57 183.57 131.12 131.12 .84

.84 O. 1900.

0. 1900. 7.7. 16.

16. 12900.00 3.00 12900.00 14.00 14.00 5.00 74.00 73.78 73.68

73. 68 99.00 99 .00 29.36 29.36 10.00 10.00 .00

.00 .00

.00 221.89 221.89 131.12 131.12 .84

.84

0. 1900.O. 1900.

7. 7.16.16. 4. 00 12400.00 4.00 12~iOO. 00 14.00 14.00 4.00 76.00 73.69 72.76 72.76 90.00 90.00 29.36 29.36 10.00 10.00 .00

.00 .00

.00 247.15 247.15 134.10 134.10 .81

.81 O. 1900.

0. 1900. 7.7. 16.

16. 12900.00 5.00 12900.00 15.00 15.00 3.00 78.00 75.63 74.74 74.74 90.00 90.00 29.34 29.34 10.00 10.00 .00

.00 .00

.00 255.63 255.63 137.13 137.13 .87

.87 page 66 Page

LaSalle County Station Station Request for a License Amendment to Technical Specification Specification 3.7.3, "Ultimate Heat Heat Sink" Sink" - Attachment 6 Year Month Station Year Station Month Day Hour Ceiling Wind Wind Drybulb Drybuib Wetbulb Wetbuib Dewpt.

DewPt. Humidity Press. Cloud Freezing Rain Solar Atmos. Partial Press.

(feet) Direc. V(knts) Temp(F) Temp(F) Temp(F) (%) (inHG) Cov(.1) Precip. Radiat. Radiat. Wat.Vap.(inHg)

(Btu/ft2/hr) (Btu/ft2/hr)

(Btu/ft2/hr) (Btu/ft2/hr) 1-30day_6am 1-30day_6am

0. 1900. 7. 16.

O. 6.00 8900.00 15.00 4.00 78.00 74.90 74.90 73.70 87.00 87.00 29.34 29.34 10.00 10.00 .00

.00 .00

.00 249.23 249.23 137.13 137.13 .84

.84

0. 1900. 7. 16.

O. 7. 00 1400.00 7.00 9.00 1.00 79.00 75.11 73.60 84.00 84.00 29.33 29.33 10.00 10.00 .00

.00 .00

.00 226.70 226.70 138.66 138.66 .84

.84 O.

0. 1900. 7. 16.

1900. 7. 16. 8.00 12900.00 6.00 4.00 78.00 78.00 75.63 75.63 74.74 90.00 90.00 29.31 29.31 10.00 .00

.00 .00

.00 189.84 189.84 137.13 137.13 .87

.87

0. 1900. 7.

O. 7. 16. 9.00

9. 00 12900.00 8.00 3.00 78.00 74.90 73.70 87.00 29.29 29.29 10.00 10.00 .00

.00 .00

.00 142.96 142.96 137.13 137.13 .84

.84

0. 1900. 7.

O. 7. 16. 10.00

10. 00 12900.00 9.00 4.00 78.00 75.63 75.63 74.74 90.00 90.00 29.29 10.00 .00

.00 .00

.00 88.94 88.94 137.13 137.13 .87

.87

0. 1900. 7.

O. 7. 16. 11. 00 11000.

11 .00 11000.00 00 9.00 4.00 76.00 73.69 72.76 90.00 29.27 29.27 10.00 .00

.00 .00

.00 35.32 35.32 134.10 134.10 .81

.81 O.

0. 1900. 7. 16. 12.00

12. 00 11000.00 9.00 3.00 76.00 72.97 71.73 87.00 87.00 29.27 29.27 10.00 .00

.00 .00

.00 .00

.00 134.10 134.10 .79

.79

0. 1900. 7.

O. 7. 16. 13.00

13. 00 11000.00 9.00 3.00 75.00 73.41 72.77 93.00 29.28 29.28 10.00 .00

.00 .00

.00 .00

.00 132.60 132.60 .81

.81

0. 1900. 7.

O. 7. 16. 14.00

14. 00 12900.00 13.00 2.00 75.00 73.41 72.77 93.00 29.28 10.00 10.00 .00

.00 .00

.00 .00

.00 132.60 132.60 .81

.81

0. 1900. 7. 16.

O. 15.00 12900.00 14.00 2.00 74.00 73.11 72.74 96.00 29.28 29.28 10.00 .00

.00 .00

.00 .00

.00 131.12 131.12 .81

.81 O.

0. 1900. 7. 16.

1900. 7. 16. 16.00 12900.00 9.00 2.00 74.00 72.43 71.77 93.00 93.00 29.25 10.00 .00

.00 .00

.00 .00

.00 131.12 131.12 .79

.79

0. 1900. 7.

O. 7. 16. 17.00

17. 00 12900.00 7.00 3.00 73.00 70.77 69.79 90.00 29.25 29.25 7.00 7.00 .00

.00 .00

.00 .00

.00 120.05 120.05 .74

.74 O.

0. 1900. 7.

7. 16. 18.00 18 .00 12900.00 12900.00 8.00 1.00 73.00 70.09 68.77 87.00 29.24 9.00 .00

.00 .00

.00 .00

.00 126.08 126.08 .71

.71

0. 1900. 7.

O. 7. 16. 19.00

19. 00 11000.00 6.00 3.00 72.00 69.80 68.80 90.00 90.00 29.23 7.00 .00

.00 .00

.00 .00

.00 118.70 118.70 .71

.71 O.

0. 1900. 7. 16.

1900. 7. 16. 20.00 11000.00 5.00 3.00 71.00 69.49 68.79 93.00 93.00 29.21 7.00 7.00 .00

.00 .00

.00 .00

.00 117.37 117.37 .71

.71 O.

0. 1900. 7. 16.

1900. 7. 16. 21.00 8900.00 5.00 3.00 71.00 69.49 68.79 93.00 29.22 10.00 .00

.00 .00

.00 .00

.00 126.77 126.77 .71

.71 O.

0. 1900. 7.

7. 16. 22.00 11000.

11000.00 00 5.00 3.00 71.00 69.49 68.79 93.00 29.22 29.22 10.00 .00

.00 .00

.00 .00

.00 126.77 126.77 .71

.71 O.

0. 1900. 7.

7. 16. 23. 00 5000.00 23.00 4.00 2.00 71.00 70.14 69.75 96.00 29.21 29.21 9.00 9.00 .00

.00 .00

.00 29.41 29.41 123.27 123.27 .73

.73

0. 1900. 7.

O. 7. 17. .00 7900.00 5.00 3.00 72.00 70.47 69.78 93.00 93.00 29.20 29.20 10.00 .00

.00 .00

.00 80.84 80.84 128.20 128.20 .74

.74

0. 1900. 7.

O. 7. 17. 1.00 8500.00 5.00 4.00 73.00 71.45 70.78 93.00 29.18 29.18 9.00 9.00 .00

.00 .00

.00 144.72 144.72 126.08 126.08 .76

.76

0. 1900. 7.

O. 7. 17. 2.00

2. 00 8900.00 5.00 6.00 73.00 72.12 71.74 96.00 29.20 10.00 .00

.00 .00

.00 183.61 183.61 129.66 129.66 .79

.79 O.

0. 1900. 7.

7. 17. 3.00

3. 00 600.00 5.00 6.00 75.00 72.01 72.01 70.74 70.74 87.00 87.00 29.20 29.20 10.00 10.00 .00

.00 .00

.00 222.45 222.45 132.60 132.60 .76

.76 O.

0. 1900. 7.

7. 17. 4.00

4. 00 eoo.oo 800.00 4.00 4.00 78.00 73.39 73.39 71.51 71.51 81.00 81.00 29.19 29.19 10.00 10.00 .00

.00 .00

.00 247.07 247.07 280.48 137.13 137.13 128.39

.78

.78

.79 O.

0. 1900. 7.

7. 17. 5. 00 8900.00 5.00 4.00 5.00 79.00 73.82 73.82 71.72 71.72 79.00 79.00 29.18 29.18 7.00 7.00 .00

.00 .00

.00 280.48 128.39 .79

0. 1900. 7.

O. 7. 17. 6. 00 3100.00 6.00 4.00 7.00 80.00 73.42 70.70 74.00 74.00 29.16 29.16 6.00 .00

.00 .00

.00 276.33 276.33 127.18 127.18 .76

.76 O.

0. 1900. 7. 17. 7.00

7. 00 35000.00 4.00 7.00 81.00 73.50 73.50 70.41 70.41 71.00 71.00 29.15 29.15 5.00 5.00 .00

.00 .00

.00 254.03 254.03 126.33 126.33 .76

.76 O.

0. 1900. 7.

7. 17. 8.00

8. 00 35000.00 5.00 7.00 82.00 73.85 73.85 70.50 70.50 69.00 69.00 29.14 29.14 5.00 5.00 .00

.00 .00

.00 213.01 213.01 127.74 127.74 .76

.76

0. 1900. 7. 17.

O. 9.00

9. 00 35000.00 5.00 6.00 82.00 73.84 73.84 70.50 70.50 69.00 29.13 29.13 5.00 5.00 .00

.00 .00

.00 159.87 159.87 127.74 127.74 .76

.76

0. 1900. 7. 17.

O. 10.00

10. 00 35000.00 5.00 7.00 82.00 73.26 69.60 67.00 29.11 2.00 2.00 .00

.00 .00

.00 102.75 102.75 123.36 123.36 .74

.74

0. 1900. 7.

O. 7. 17. 11.00 35000.

35000.00 00 4.00 6.00 78.00 72.10 69.58 76.00 76.00 29.12 29.12 2.00 2.00 .00

.00 .00

.00 40.10 40.10 118.00 118.00 .73

.73 O.

0. 1900. 7.

7. 17. 12.00

12. 00 35000.00 5.00 2.00 78.00 72.10 69.58 76.00 76.00 29.10 29.10 .00

.00 .00

.00 .00

.00 .00

.00 117.20 117.20 .73

.73 O.

0. 1900. 7.

7. 17. 13.00

13. 00 35000.00 5.00 3.00 79.00 73.03 70.55 76.00 76.00 29.11 29.11 .00

.00 .00

.00 .00

.00 .00

.00 118.52 118.52 .76

.76 O.

0. 1900. 7.

7. 17. 14.00

14. 00 35000.00 2.00 3.00 78.00 72.88 72.88 70.75 70.75 79.00 79.00 29.12 29.12 .00

.00 .00

.00 .00

.00 .00

.00 117.20 117.20 .76

.76 O.

0. 1900. 7. 17.

1900. 7. 17. 15.00 35000.00 1.00 3.00 78.00 72.10 69.58 76.00 76.00 29.15 29.15 .00

.00 .00

.00 .00

.00 .00

.00 117.20 117.20 .73

.73

0. 1900. 7.

O. 7. 17. 16.00

16. 00 35000.00 2.00 3.00 76.00 71.50 69.55 69.55 81.00 81.00 29.15 29.15 .00

.00 .00

.00 .00

.00 .00

.00 114.61 114.61 .73

.73

0. 1900. 7.

O. 7. 17. 17.00 17 .00 35000.00 4.00 6.00 75.00 71.29 69.67 84.00 84.00 29.16 29.16 .00

.00 .00

.00 .00

.00 .00

.00 113.34 113.34 .74

.74

0. 1900. 7.

O. 7. 17. 18.00

18. 00 35000.00 3.00 3.00 73.00 70.77 69.79 69.79 90.00 90.00 29.16 29.16 .00

.00 .00

.00 .00

.00 .00

.00 110.82 110.82 .74

.74 O.

0. 1900. 7.

7. 17. 19.00

19. 00 35000.00 4.00 1.00 71.00 69.49 68.79 93.00 93.00 29.16 29.16 .00

.00 .00

.00 .00

.00 .00

.00 108.35 108.35 .71

.71 O.

0. 1900. 7. 17. 20.00

20. 00 35000.00 2.00 1.00 71.00 69.49 68.79 93.00 29.16 29.16 .00

.00 .00

.00 .00

.00 .00

.00 108.35 108.35 .71

.71 O.

0. 1900. 7. 17.

17. 35000.00 21.00 35000.00 3.00 1.00 70.00 70.00 69.15 68.75 96.00 29.17 29.17 .00

.00 .00

.00 .00

.00 .00

.00 107.13 107.13 .71

.71 O.

0. 1900. 7. 17. 22.00

22. 00 35000.00 1.00 3.00 70.00 69.15 69.15 68.75 96.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 107.13 107.13 .71

.71 O.

0. 1900. 7. 17.

7. 17. 35000.00 23.00 35000.00 4.00 4.00 71.00 68.83 68.83 67.81 90.00 29.19 29.19 5.00 5.00 .00

.00 .00

.00 30.11 30.11 112.95 112.95 .69

.69 O. 1900. 7. 18.

0. 1900. .00 35000.00 5.00 3.00 71.00 71.00 69.49 68.79 93.00 29.21 29.21 5.00 5.00 .00

.00 .00

.00 89.72 89.72 112.95 112.95 .71

.71 O. 1900. 7. 18.

0. 1900. 1.00

1. 00 35000.00 3.00 2.00 71.00 71.00 70.98 100.00 100.00 29.23 29.23 2.00 2.00 .00

.00 .00

.00 154.93 154.93 109.08 109.08 .76

.76 O. 1900. 7.

0. 1900. 7. 18. 2.00 35000.00 2.00 2.00 71.00 71.00 70.98 100.00 100.00 29.25 29.25 5.00 5.00 .00

.00 .00

.00 204.70 204.70 112.95 112.95 .76

.76 O.

0. 1900. 7. 18.

1900. 7. 18. 3.00 35000.00 6.00 4.00 73.00 72.12 71.74 96.00 29.25 29.25 5.00 5.00 .00

.00 .00

.00 247.37 247.37 115.53 115.53 .79

.79 O.

0. 1900. 7.

7. 18. 4.00

4. 00 35000.00 7.00 3.00 74.00 71.74 70.78 90.00 29.25 29.25 5.00 5.00 .00

.00 .00

.00 275.68 275.68 116.83 116.83 .76

.76 O.

0. 1900. 7. 18.

1900. 7. 18. 5.00 4100.00 5.00 7.00 4.00 77.00 71.69 69.39 78.00 29.25 29.25 7.00 7.00 .00

.00 .00

.00 280.77 280.77 125.56 125.56 .73

.73 O. 1900. 7.

0. 1900. 7. 18. 6.00 15000.00 7.00 4.00 79.00 72.23 69.32 73.00 29.24 29.24 5.00 5.00 .00

.00 .00

.00 279.04 279.04 123.55 123.55 .73

.73 O.

0. 1900. 7. 18.

7. 18. 7.00

7. 00 35000.00 7.00 5.00 80.00 72.60 69.44 71.00 29.23 29.23 4.00 4.00 .00

.00 .00

.00 256.18 256.18 123.10 123.10 .73

.73 O. 1900. 7.

0. 1900. 18.

7. 18. 8.00 35000.00 6.00 6.00 81.00 72.38 68.65 67.00 29.22 29.22 5.00 5.00 .00

.00 .00

.00 212.73 212.73 126.33 126.33 .71

.71 O. 1900. 7.

0. 1900. 18.

7. 18. 9.00 4100.00 9.00 6.00 5.00 82.00 73.85 70.50 69.00 29.20 29.20 7.00 7.00 .00

.00 .00

.00 155.47 155.47 132.74 132.74 .76

.76 O. 1900.

0. 7. 18.

1900. 7. 18. 10.00

10. 00 25000.00 6.00 6.00 82.00 73.27 69.60 67.00 29.20 29.20 10.00 10.00 .00

.00 .00

.00 88.14 88.14 143.36 143.36 .74

.74 O. 1900.

0. 7. 18.

1900. 7. 18. 11.00

11. 00 25000.00 6.00 6.00 81.00 73.51 70.41 71.00 29.18 29.18 10.00 10.00 .00

.00 .00

.00 33.78 33.78 141.78 141.78 .76

.76 O. 1900.

0. 1900. 7.

7. 18.

18. 12.00

12. 00 25000.00 5.00 5.00 5.00 80.00 73.96 71.52 71.52 76.00 29.18 29.18 10.00 10.00 .00

.00 .00

.00 .00

.00 140.22 140.22 .78

.78 O. 1900.

0. 1900. 7.

7. 18.

18. 25fiOO.00 13.00 25600.00 6.00 5.00 78.00 72.88 70.75 70.75 79.00 29.18 29.18 10.00 10.00 .00

.00 .00

.00 .00

.00 137.13 137.13 .76

.76 84.00O. 1900.

0. 1900. 7.

7. 18.

18. 14.00

14. 15000.00 00 15000.00 5.00 5.00 5.00 76.00 72.24 70.66 84.00 29.19 29.19 9.00 9.00 .00

.00 .00

.00 .00

.00 130.40 130.40 .76

.76 O. 1900.

0. 1900. 7.

7. 18.

18. 15000.00 15.00 15000.00 5.00 5.00 5.00 74.00 71.74 71.74 70.78 70.78 90.00 90.00 29.21 29.21 9.00 9.00 .00

.00 .00

.00 .00

.00 127.50 127.50 .76

.76 O. 1900.

0. 1900. 7.

7. 18.

18. 16.00

16. 15000.00 00 15000.00 5.00 4.00 73.00 72.12 71.74 71.74 96.00 96.00 29.22 29.22 10.00 10.00 .00

.00 .00

.00 .00

.00 129.66 129.66 .79

.79 71.45O. 1900.

0. 7. 18.

1900. 7. 18. 17.00

17. 15000.00 00 15000.00 5.00 4.00 73.00 71.45 70.78 70.78 93.00 93.00 29.22 29.22 6.00 6.00 .00

.00 .00

.00 .00

.00 117.60 117.60 .76

.76 O. 1900.

0. 1900. 7.

7. 18.

18. 15(100.00 18.00 15000.00 5.00 5.00 5.00 72.00 71.13 71.13 70.74 70.74 96.00 96.00 29.21 29.21 7.00 7.00 .00

.00 .00

.00 .00

.00 118.70 118.70 .76

.76 Page 77 Page

LaSalle LaSalle County County Station Station Request for a License Amendment to Technical Specification 3.7.3, "Ultimate Heat Heat Sink" Sink" -- Attachment Attachment 66 Station Year Station Year Month Day Month Day Hour Hour Ceiling Ceiling Wind Wind Wind Wind Drybuib Drybulb Wetbuib Wetbulb DewPt.

DewPt. Humidity Humidity Press.

Press. Cloud Cloud Freezing Freezing Rain Rain Solar Solar Atmos. Partial Partial Press.

Press.

(feet)

(feet) Direc.

Direc. V(knts)

V(knts) Temp(F)

Temp(F) Temp(F)

Temp(F) Temp(F)

Temp(F) (%)

(%) (inHG)

(inHG) Cov(.1)

Cov(.1) Precip.

Precip. Radial.

Radiat. Radiat. WaI.Vap.(inHg)

Radial. Wat.Vap.(inHg)

(Btu/ft2/hr) (Btu/ft2/hr)

(Btu/ft2/hr) (Btu/ft2/hr) 1-30day_6am 1-30day_6am O.

0. 1900. 7. 7. 18.

18. 19.00 3500.00 19.00 3500.00 5.00 5.00 5.00 5.00 71.00 71.00 70.98 100.00 100.00 29.21 29.21 10.00 10.00 .00

.00 .00

.00 .00

.00 126.77 126.77 .76

.76 O.

0. 1900. 7. 7. 18.

18. 20.00 8900.00 20.00 8900.00 5.00 5.00 5.00 5.00 71.00 71.00 70.98 100.00 100.00 29.22 29.22 10.00 10.00 .00

.00 .00

.00 .00

.00 126.77 126.77 .76

.76 O.

0. 1900.

1900. 7.7. 18.

18. 21.00 6000.00 21.00 6000.00 5.00 5.00 4.00 4.00 71.00 71.00 70.98 100.00 100.00 29.21 29.21 10.00 10.00 .00

.00 .00

.00 .00

.00 126.77 126.77 .76

.76 O.

0. 1900.

1900. 7.7. 18.

18. 22.00 22.00 10000.00 6.00 6.00 4.00 4.00 71.00 70.14 70.14 69.75 69.75 96.00 96.00 29.20 29.20 10.00 10.00 .00

.00 .00

.00 .00

.00 126.77 126.77 .73

.73 O.

0. 1900.

1900. 7.7. 18.

18. 23.00 23.00 8900.00 8900.00 5.00 5.00 4.00 4.00 71.00 69.49 68.79 93.00 29.21 29.21 7.00 7.00 .00

.00 .00

.00 28.63 28.63 117.37 117.37 .71

.71 O.

0. 1900.

1900. 7.7. 19.

19. .00 8900.00

.00 5.00 6.00 71.00 69.49 68.79 93.00 93.00 29.22 29.22 6.00 6.00 .00

.00 .00

.00 87.93 87.93 114.98 114.98 .71

.71 O.

0. 1900.

1900. 7.7. 19.

19. 1.00 1.00 35000.00 5.00 8.00 72.00 70.47 69.78 69.78 93.00 93.00 29.23 29.23 2.00 2.00 .00

.00 .00

.00 154.45 154.45 110.32 110.32 .74

.74 O.

0. 1900.

1900. 7.7. 19.

19. 2.00 2.00 35000.00 5.00 9.00 73.00 70.77 69.79 90.00 29.25 29.25 1.00 1.00 .00

.00 .00

.00 212.95 212.95 111.01 111.01 .74

.74 O.

0. 1900. 7. 7. 19.

19. 3.00 35000.00 5.00 8.00 74.00 71.74 70.78 90.00 90.00 29.26 29.26 5.00 5.00 .00

.00 .00

.00 247.00 247.00 116.83 116.83 .76

.76 O. 1900. 7.

0. 1900. 7. 19. 4.00 1900.00 1900.00 8.00 6.00 77.00 73.20 71.64 84.00 29.27 29.27 7.00 7.00 .00

.00 .00

.00 268.67 268.67 125.56 125.56 .79

.79 o.

0. 1900.

1900. 7. 7. 19.

19. 5.00 2200.00 8.00 6.00 79.00 73.82 71.72 79.00 29.27 29.27 7.00 7.00 .00

.00 .00

.00 278.83 278.83 128.39 128.39 .79

.79 O.

0. 1900.

1900. 7. 7. 19.

19. 6.00 2100.00 7.00 5.00 81.00 74.34 71.67 74.00 74.00 29.26 29.26 7.00 7.00 .00

.00 .00

.00 271.20 271.20 131.27 131.27 .79

.79 O. 1900. 7. 19.

0. 1900. 19. 7.00 35000.00 7.00 7.00 81.00 73.51 70.41 71.00 29.24 29.24 2.00 2.00 .00

.00 .00

.00 260.10 260.10 122.00 122.00 .76

.76 O.

0. 1900. 7. 7. 19.

19. 8.00 3100.00 7.00 7.00 82.00 74.42 74 .42 71.37 71.00

71. 00 29.23 29.23 6.00 6.00 .00

.00 .00

.00 208.44 208.44 130.03 130.03 .78

.78 O. 1900. 7.

0. 1900. 7. 19. 9.00 35000.00 35000.00 7.00 6.00 83.00 73.28 69.16 64.00 29.22 29.22 5.00 5.00 .00

.00 .00

.00 158.16 158.16 129.16 129.16 .73

.73 O.

0. 1900.

1900. 7.7. 19.

19. 10.00 35000.00 35000.00 7.00 6.00 83.00 74.17 70.56 67.00 29.21 29.21 2.00 2.00 .00

.00 .00

.00 100.26 100.26 124.74 124.74 .76

.76 O.

0. 1900.

1900. 7.7. 19.

19. 11.00 35000.00 35000.00 7.00 5.00 83.00 74.17 70.56 67.00 29.21 29.21 2.00 2.00 .00

.00 .00

.00 37.86 37.86 124.74 124.74 .76

.76 o.

0. 1900.

1900. 7.7. 19.

19. 12.00 35000.00 35000.00 6.00 5.00 82.00 73.85 70.50 69.00 29.21 29.21 2.00 2.00 .00

.00 .00

.00 .00

.00 123.36 123.36 .76

.76 O. 1900. 7.

0. 1900. 7. 19. 13.00 13 .00 35000.00 5.00 5.00 79.00 73.04 70.55 76.00 76.00 29.23 29.23 2.00 2.00 .00

.00 .00

.00 .00

.00 119.32 119.32 .76

.76 O. 1900. 7.

0. 1900. 7. 19.

19. 14.00 35000.00 6.00 4.00 76.00 72.25 70.66 84.00 29.24 29.24 1.00 1.00 .00

.00 .00

.00 .00

.00 114.81 114.81 .76

.76 O.

0. 1900.

1900. 7. 19.

7. 19. 15.00 35000.00 6.00 3.00 75.00 72.01 70.74 87.00 29.25 29.25 .00

.00 .00

.00 .00

.00 .00

.00 113.34 113.34 .76

.76 O. 1900. 7.

0. 1900. 19.

7. 19. 16.00 35000.00 35000.00 6.00 4.00 73.00 71.45 70.78 93.00 93.00 29.24 29.24 .00

.00 .00

.00 .00

.00 .00

.00 110.82 110.82 .76

.76 O. 1900. 7.

0. 1900. 7. 19.

19. 17.00

17. 00 35000.00 5.00 3.00 72.00 70.47 69.78 93.00 29.25 29.25 .00

.00 .00

.00 .00

.00 .00

.00 109.58 109.58 .74

.74 O.

0. 1900. 7. 7. 19.

19. 18.00 35000.00 35000.00 5.00 4.00 71.00 69.49 68.79 93.00 29.25 29.25 .00

.00 .00

.00 .00

.00 .00

.00 108.35 108.35 .71

.71 O.

0. 1900.

1900. 7. 7. 19.

19. 19.00 35000.00 35000.00 5.00 5.00 70.00 69.15 68.75 96.00 29.25 29.25 .00

.00 .00

.00 .00

.00 .00

.00 107.13 107.13 .71

.71 O.

0. 1900.

1900. 7.7. 19.

19. 20.00 35000.00 35000.00 5.00 4.00 69.00 69.00 68.97 100.00 100.00 29.23 29.23 2.00 2.00 .00

.00 .00

.00 .00

.00 106.64 106.64 .71

.71 O.

0. 1900.

1900. 7.7. 19.

19. 21.00 35000.00 35000.00 6.00 3.00 68.00 68.00 67.97 100.00 100.00 29.23 29.23 2.00 2.00 .00

.00 .00

.00 .00

.00 105.44 105.44 .69

.69 O.

0. 1900.

1900. 7.7. 19.

19. 22.00 35000.00 35000.00 5.00 3.00 69.00 69.00 68.97 100.00 100.00 29.24 29.24 2.00 2.00 .00

.00 .00

.00 .00

.00 106.64 106.64 .71

.71 O. 1900. 7.

0. 1900. 19.

7. 19. 23.00 35000.00 35000.00 5.00 5.00 69.00 69.00 68.97 100.00 100.00 29.26 29.26 2.00 2.00 .00

.00 .00

.00 29.34 29.34 106.64 106.64 .71

.71 O. 1900. 7.

0. 1900. 20.

7. 20. .00

.00 35000.00 7.00 2.00 67.00 67.00 66.96 100.00 29.25 29.25 5.00 5.00 .00

.00 .00

.00 88.38 88.38 107.94 107.94 .67

.67 O. 1900. 7.

0. 1900. 20.

7. 20. 1.00 35400.00 35UOO.00 6.00 4.00 69.00 69.00 68.97 100.00 68.97 100.00 29.26 29.26 5.00 5.00 .00

.00 .00

.00 149.12 149.12 110.42 110.42 .71

.71

0. 1900.O. 1900.7. 7.20. 20. 2.00 35000.00 35000.00 7.00 5.00 71.00 71.00 70.98 100.00 70.98 29.25 29.25 5.00 5.00 .00

.00 .00

.00 203.07 203.07 112.95 112.95 .76

.76 O.

0. 1900.

1900. 7. 7. 20.

20. 3.00 35000.00 35000.00 7.00 4.00 74.00 73.11 73 .11 72.74 72 .74 96.00 96.00 29.25 29.25 5.00 5.00 .00

.00 .00

.00 245.32 245.32 116.83 116.83 .81

.81 o.

0. 1900.

1900. 7. 7. 20.

20. 4.00 35000.00 35000.00 7.00 3.00 77.00 73.94 72.71 87.00 87.00 29.25 29.25 5.00 5.00 .00

.00 .00

.00

.00 273.12 273.12 277.17 120.83 120.83 129.82

.81

.81

.84 O.

0. 1900.

1900. 7. 7. 20.

20. 5.00 35000.00 35000.00 5.00 7.00 80.00 75.28 73.47 81.00 81.00 29.23 29.23 7.00 7.00 .00

.00 .00 277.17 129.82 .84 O. 1900. 7.

0. 1900. 20.

7. 20. 6.00 15000.00 6.00 7.00 81.00 75.70 75.70 73.67 73.67 79.00 79.00 29.23 29.23 10.00 10.00 .00

.00 .00

.00 246.20 246.20 141. 78 141.78 .84

.84 O. 1900. 7.

0. 1900. 20.

7. 20. 7.00 1600.00 7.00 5.00 9.00 82.00 77.17 75.42 75.42 81.00 81.00 29.22 29.22 10.00 10.00 .00

.00 .00

.00 222.69 222.69 143.36 143.36 .89

.89

o. 1900. 7.

0. 1900. 20.

7. 20. 8.00 8.00 2700.00 6.00 9.00 81.00 75.70 75.70 73.67 79.00 79.00 29.24 29.24 10.00 10.00 .00

.00 .00

.00

.00 186.73 186.73 140.13 141.78 141.78 138.66

.84

.84

.76 O. 1900. 7.

0. 1900. 20.

7. 20. 9.00 3700.00 9.00 3700.00 6.00 6.00 6.00 79.00 73.04 70.55 70.55 76.00 76.00 29.26 29.26 10.00 10.00 .00

.00 .00 140.13 138.66 .76 O.

0. 1900.

1900. 7. 7. 20.

20. 10.00 7500.00 10.00 7500.00 12.00 10.00 71.00 71.00 70.98 100.00 100.00 29.27 29.27 10.00 10.00 .00

.00 .00

.00 85.85 85.85 126.77 126.77 .76

.76 o.

0. 1900.

1900. 7. 7. 20.

20. 11.00 12900.00 11.00 12900.00 13.00 4.00 68.00 68.00 67.97 100.00 67.97 100.00 29.19 29.19 10.00 10.00 .00

.00 .00

.00 32.14 32.14

.00 122.53 122.53 126.77

.69

.69

.69 O. 1900. 7. 20.

0. 1900. 7. 20. 12.00 11000.00 11000.00 9.00 9.00 2.00 2.00 71.00 68.83 67.81 90.00 90.00 29.16 29.16 10.00 10.00 .00

.00 .00

.00 .00 126.77 .69 O. 1900. 7. 20.

0. 1900. 7. 20. 13.00 12900.00 12900.00 4.00 4.00 2.00 72.00 70.47 70.47 69.78 93.00 93.00 29.19 29.19 7.00 7.00 .00

.00 .00

.00 .00

.00 118.70 118.70 .74

.74 O. 1900. 7.

0. 1900. 7. 20.

20. 14.00 12900.00 14.00 12900.00 6.00 6.00 4.00 70.00 69.79 69.67 99.00 99.00 29.19 29.19 6.00 6.00 .00

.00 .00

.00 .00

.00 113.68 113.68 .73

.73 O. 1900.

0. 1900. 7. 7. 20.

20. 15.00 35000.00 15.00 35000.00 6.00 3.00 3.00 69.00 68.17 68 .17 67.75

67. 75 96.00 96.00 29.20 29.20 .00

.00 .00

.00 .00

.00 .00

.00 105.92 105.92 .69

.69 O. 1900. 7. 20.

0. 1900. 7. 20. 16.00 35000.00 16.00 35000.00 10.00 10.00 4.00 4.00 68.00 67.18 67.18 66.75 66.75 96.00 96.00 29.19 29.19 .00

.00 .00

.00 .00

.00 .00

.00 104.72 104.72 .66

.66 O. 1900. 7. 20.

0. 1900. 7. 20. 17.00 35000.00 17.00 35000.00 9.00 9.00 3.00 3.00 68.00 67.18 67.18 66.75 66.75 96.00 96.00 29.21 29.21 .00

.00 .00

.00 .00

.00 .00

.00 104.72 104.72 .66

.66 O. 1900.

0. 1900. 7. 7. 20.

20. 18.00 35000.00 18.00 35000.00 9.00 9.00 3.00 3.00 67.00 66.80 66.80 66.66 66.66 99.00 99.00 29.22 29.22 .00

.00 .00

.00 .00

.00 .00

.00 103.54 103.54 .66

.66 o.

0. 1900. 7.

1900. 7. 20.

20. 19.00 35000.00 19.00 35000.00 9.00 9.00 2.00 67.00 66.19 66.19 65.75 65.75 96.00 96.00 29.21 29.21 .00

.00 .00

.00 .00

.00 .00

.00 103.54 103.54 .64

.64

.66 O. 1900. 7. 20.

0. 1900. 7. 20. 20.00 35000.00 20.00 35000.00 11.00 11.00 2.00 2.00 67.00 67.00 66.80 66.80 66.66 66.66 99.00 99.00 29.21 29.21 .00

.00 .00

.00 .00

.00 .00

.00 103.54 103.54 .66 O. 1900. 7. 20.

0. 1900. 7. 20. 21.00 35000.00 21.00 35000.00 5.00 5.00 4.00 65.00 65.00 65.00 65.00 64.96 100.00 64.96 100.00 29.21 29.21 .00

.00 .00

.00 .00

.00 .00

.00 101.21 101.21 .62

.62

o. 1900.

0. 1900. 7. 7. 20.

20. 22.00 35000.00 22.00 35000.00 6.00 6.00 4.00 4.00 65.00 65.00 65.00 65.00 64.96 100.00 64.96 100.00 29.20 29.20 .00

.00 .00

.00 .00

.00 .00

.00 101.21 101.21 .62

.62

.62 O. 1900.

0. 1900. 7. 7. 20.

20. 23.00 35000.00 23.00 35000.00 5.00 5.00 4.00 4.00 65.00 65.00 65.00 65.00 64.96 100.00 64.96 100.00 29.20 29.20 2.00 2.00 .00

.00 .00

.00 28.90 28.90 101.89 101.89 .62 O. 1900. 7. 21.

0. 1900. 7. 21. .00 35000.00

.00 35000.00 6.00 6.00 5.00 5.00 66.00 66.00 66.00 66.00 65.96 100.00 65.96 100.00 29.21 29.21 1.00 1.00 .00

.00 .00

.00 91.41 91.41 102.54 102.54 .64

.64 O. 1900. 7. 21.

0. 1900. 7. 21. 1.00 35000.00 1.00 35000.00 8.00 8.00 4.00 4.00 69.00 69.00 69.00 69.00 68.97 100.00 68.97 100.00 29.21 29.21 1.00 1.00 .00

.00 .00

.00 154.53 154.53 106.10 106.10 .71

.71 O. 1900.

0. 1900. 7. 7. 21.

21. 2.00

2. 35{100.00 00 35000.00 9.00 9.00 6.00 6.00 73.00 73.00 73.00 73.00 72.99 100.00 72.99 100.00 29.21 29.21 .00

.00 .00

.00 .00

.00 212.08 212.08 110.82 110.82 .82

.82 O. 1900.

0. 1900. 7. 7. 21.

21. 3.00 35000.00

3. 00 35000.00 9.00 9.00 4.00 4.00 77.00 77.00 76.08 76.08 75.74 75.74 96.00 96.00 29.19 29.19 .00

.00 .00

.00 .00

.00 255.95 255.95 115.90 115.90 .90

.90 O. 1900. 7. 21.

0. 1900. 7. 21. 4.00 35000.00 4.00 35000.00 9.00 9.00 2.00 2.00 80.00 80.00 78.31 78.31 77.74 77.74 93.00 93.00 29.17 29.17 1.00 1.00 .00

.00 .00

.00 281.16 281.16 120.05 120.05 .96

.96 O. 1900. 7. 21.

0. 1900. 7. 21. 5.00 35000.00 5.00 35000.00 9.00 9.00 3.00 3.00 81.00 81.00 79.30 79.30 78.74 78.74 93.00 93.00 29.18 29.18 2.00 2.00 .00

.00 .00

.00 288.38 288.38 122.00 122.00 .99

.99 O. 1900.

0. 1900. 7. 7. 21.

21. 6.00 35600.00 6.00 35l100.00 8.00 8.00 5.00 5.00 84.00 84.00 79.34 79.34 77.76 77.76 82.00 82.00 29.17 29.17 5.00 5.00 .00

.00 .00

.00 272.20 272.20 130.59 130.59 .96

.96 O. 1900.

0. 1900. 7. 7. 21.

21. 7.00 25COO.00 7.00 25000.00 8.00 8.00 6.00 6.00 86.00 86.00 79.82 79.82 77.74 77.74 77.00 77.00 29.16 29.16 9.00 9.00 .00

.00 .00

.00 236.44 236.44 145.69 145.69 .96

.96 Page 88 Page

LaSalle County Station Request for a License Amendment to Technical Specification Specification 3.7.3, 3.7.3, "Ultimate "Ultimate Heat Heat Sink" Sink" -- Attachment Attachment 66 Station Year Station Year Month Month Day Day Hour Hour Ceiling Wind Wind Drybuib Drybulb Wetbulb Wetbuib Dewpt.

DewPt. Humidity Press. Cloud Freezing Rain Solar Atmos. Partial Press.

(feet) Direc. V(knts) Temp(F) Temp(F) Temp(F) (%) (inHG) Cov(.1) Precip. Radiat. Radiat. Wat.Vap.(inHg)

(Btu/ft2/hr) (Btu/ft2/hr)

(Btu/ft2/hr) (Btu/ft2/hr) 1-30day_6am 1-30day_6am O.

0. 1900.

1900. 7. 21.

7. 21. 8.00 25000.00 9.00 6.00 88.00 81.69 81.69 79.68 79.68 77.00 77.00 29.16 29.16 7.00 7.00 .00

.00 .00

.00 200.84 200.84 141.80 141.80 1.03 1.03 O.

0. 1900.

1900. 7. 21.

7. 21. 9.00 35000.00 7.00 8.00 87.00 80.75 78.71 78 .71 77.00

77. 00 29.14 29.14 9.00 9.00 .00

.00 .00

.00 146.39 146.39 147.30 147.30 1.00 1.00 O.

0. 1900. 7.

7. 21. 10.00 35000.00 14.00 11.00 70.00 70.00 70.00 69.98 100.00 100.00 29.13 29.13 9.00 9.00 .00

.00 .00

.00 91.05 91.05 121.88 121.88 .74

.74 O. 1900.

0. 1900. 7. 21.

7. 21. 11.00 11.00 35000.00 10.00 5.00 72.00 72.00 71.99 100.00 29.11 9.00 9.00 .00

.00 .00

.00 32.99 32.99 124.66 124.66 .79

.79 O.

0. 1900.

1900. 7. 21.

7. 21. 12.00 25000.00 10.00 5.00 71.00 71.00 70.98 100.00 100.00 29.16 29.16 7.00 7.00 .00

.00 .00

.00 .00

.00 117.37 117.37 .76

.76 O.

0. 1900.

1900. 7. 21.

7. 21. 13.00 5400.00 12.00 8.00 71.00 69.49 68.79 93.00 29.16 29.16 10.00 .00

.00 .00

.00 .00

.00 126.77 126.77 .71

.71 O.

0. 1900. 7.

7. 21. 14. 00 2700.00 14.00 11.00 8.00 72.00 69.80 68.80 90.00 29.21 29 .21 10.00 10 .00 .00

.00 .00

.00 .00

.00 128.20 128.20 .71

.71 O.

0. 1900. 7.

7. 21. 15.00 12900.00 13.00 12.00 72.00 70.47 69.78 69.78 93.00 93.00 29.17 29 .17 10.00 10 .00 .00

.00 .00

.00 .00

.00 128.20 128.20 .74

.74 o.

0. 1900.

1900. 7. 21.

7. 21. 16.00 12900.00 5.00 8.00 72.00 70.47 70.47 69.78 93.00 93.00 29.16 29.16 10.00 10.00 .00

.00 .00

.00 .00

.00 128.20 128.20 .74

.74 O.

0. 1900. 7.

7. 21. 17.00

17. 00 12900.00 3.00 2.00 72.00 70.47 69.78 93.00 93.00 29.13 10.00 10.00 .00

.00 .00

.00 .00

.00 128.20 128.20 .74

.74 o.

0. 1900. 7.

7. 21. 18.00 7900.00 15.00 2.00 72.00 69.80 68.80 90.00 90.00 29.13 29.13 10.00 10.00 .00

.00 .00

.00 .00

.00 128.20 128.20 .71

.71 O.

0. 1900. 7.

7. 21. 19.00 8500.00 9.00 2.00 70.00 68.51 67.79 93.00 29.13 10.00 .00

.00 .00

.00 .00

.00 125.34 125.34 .69

.69 O.

0. 1900. 7.

7. 21. 20.00 12900.00 13.00 1.00 70.00 69.15 68.75 96.00 29.14 10.00 .00

.00 .00

.00 .00

.00 125.34 125.34 .71

.71 O.

0. 1900. 7.

7. 21. 21.00 12900.00 9.00 2.00 71.00 69.49 68.79 93.00 93.00 29.13 10.00 10.00 .00

.00 .00

.00 .00

.00 126.77 126.77 .71

.71 O.

0. 1900.

1900. 7. 21.

7. 21. 22.00 15000.00 11.00 4.00 70.00 69.15 68.75 96.00 96.00 29.14 10.00 10.00 .00

.00 .00

.00 .00

.00 125.34 125.34 .71

.71 O.

0. 1900.

1900. 7. 21.

7. 21. 23.00 12900.00 12.00 2.00 69.00 69.00 68.97 100.00 29.16 29.16 10.00 10.00 .00

.00 .00

.00 24.07 24.07 123.93 123.93 .71

.71 O.

0. 1900.

1900. 7. 22.

7. 22. .00

.00 12900.00 12900.00 10.00 4.00 71.00 70.14 69.75 96.00 29.16 10.00 .00

.00 .00

.00 77.05 77.05 126.77 126.77 .73

.73 O.

0. 1900. 7.

7. 22. 1. 00 12900.00 1.00 9.00 3.00 72.00 69.80 68.80 90.00 29.16 10.00 .00

.00 .00

.00 131.97 131.97 128.20 128.20 .71

.71 O.

0. 1900.

1900. 7. 22.

7. 22. 2.00 11000.00 11.00 4.00 73.00 70.08 68.77 87.00 29.20 10.00 .00

.00 .00

.00 180.97 180.97 129.66 129.66 .71

.71 O.

0. 1900.

1900. 7. 22.

7. 22. 3.00 12900.00 10.00 3.00 75.00 70.56 68.58 81.00 81.00 29.22 10.00 .00

.00 .00

.00 219.65 219.65 132.60 132.60 .71

.71 O.

0. 1900.

1900. 7. 22.

7. 22. 4.00 15000.00 12.00 7.00 77.00 71.69 69.39 78.00 29.20 29.20 10.00 10.00 .00

.00 .00

.00 244.28 244.28 135.61 135.61 .73

.73 O.

0. 1900.

1900. 7. 22.

7. 22. 5.00 15000.00 14.00 6.00 78.00 73.39 73.39 71.51 71.51 81.00 81.00 29.19 29.19 10.00 10.00 .00

.00 .00

.00 252.63 252.63 137.13 137.13 .78

.78 O.

0. 1900. 7.

7. 22. 6.00 15000.00 15.00 6.00 80.00 73.96 71.52 76.00 76.00 29.18 29.18 10.00 .00

.00 .00

.00 245.48 245.48 140.22 140.22 .78

.78 O.

0. 1900. 7.

7. 22. 7.00 15000.00 14.00 3.00 81.00 74.34 71.67 74.00 74.00 29.16 29.16 7.00 7.00 .00

.00 .00

.00 243.41 243.41 131.27 131.27 .79

.79 o.

0. 1900. 7. 22.

7. 22. 8.00 35000.00 9.00 3.00 82.00 75.26 75.26 72.63 72.63 74.00 74.00 29.16 29.16 5.00 5.00 .00

.00 .00

.00 207.01 207.01 127.74 127.74 .82

.82 O.

0. 1900. 7. 22.

7. 22. 9.00 35000.00 7.00 4.00 82.00 75.81 75.81 73.45 76.00 76.00 29.14 29.14 2.00 2.00 .00

.00 .00

.00 158.30 158.30 123.36 123.36 .84

.84 O.

0. 1900. 7.

7. 22. 10.00 35000.00 8.00 5.00 81.00 74.89 74.89 72.49 76.00 76.00 29.14 29.14 2.00 2.00 .00

.00 .00

.00 96.26 96.26 122.00 122.00 .81

.81 o.

0. 1900. 7.

7. 22. 11.00

11. 00 15000.00 7.00 5.00 80.00 75.28 75.28 73.47 73.47 81.00 81.00 29.15 29.15 6.00 6.00 .00

.00 .00

.00 32.85 32.85 127.18 127.18 .84

.84 O.

0. 1900. 7.

7. 22. 12.00 12 .00 15000.00 8.00 4.00 79.00 74.59 72.86 82.00 82.00 29.15 29.15 6.00 6.00 .00

.00 .00

.00 .00

.00 125.77 125.77 .82

.82 O.

0. 1900.

1900. 7. 22.

7. 22. 13.00 35000.00 13.00 3.00 78.00 74.90 73.70 87.00 87.00 29.16 29.16 5.00 5.00 .00

.00 .00

.00 .00

.00 122.18 122.18 .84

.84 O.

0. 1900. 7. 22.

7. 22. 14.00 35000.00 13.00 3.00 77.00 73.93 72.71 87.00 87.00 29.17 29.17 2.00 2.00 .00

.00 .00

.00 .00

.00 116.69 116.69 .81

.81 O.

0. 1900. 7. 22.

7. 22. 15.00 35000.00 13.00 2.00 77.00 73.93 72.71 87.00 87.00 29.18 29.18 2.00 2.00 .00

.00 .00

.00 .00

.00 116.69 116.69 .81

.81 O.

0. 1900. 7. 22.

7. 22. 16.00 35000.00 35000.00 12.00 3.00 76.00 73.69 73.69 72.76 90.00 90.00 29.19 29.19 .00

.00 .00

.00 .00

.00 .00

.00 114.61 114.61 .81

.81 O.

0. 1900. 7. 22.

7. 22. 17.00 35000.00 35000.00 12.00 3.00 76.00 73.69 73.69 72.76 90.00 90.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 114.61 114.61 .81

.81 O.

0. 1900. 7. 22.

7. 22. 18.00 35000.00 35000.00 10.00 3.00 74.00 73.11 73 .11 72.74

72. 74 96.00 96.00 29.19 29.19 .00

.00 .00

.00 .00

.00 .00

.00 112.07 112.07 .81

.81 O.

0. 1900.

1900. 7.7. 22.

22. 19.00 35000.00 11.00 3.00 73.00 72.12 71.74 96.00 96.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 110.82 110.82 .79

.79 o.

0. 1900.

1900. 7.7. 22.

22. 35000.00 20.00 35000.00 11.00 3.00 72.00 72.00 71.99 100.00 100.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 109.58 109.58 .79

.79 O.

0. 1900.

1900. 7.7. 22.

22. 35000.00 21.00 35000.00 12.00 4.00 72.00 72.00 71.99 100.00 100.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 109.58 109.58 .79

.79 O.

0. 1900. 7. 22.

7. 22. 35000.00 22.00 35000.00 12.00 4.00 72.00 72.00 71.99 100.00 100.00 29.19 29.19 5.00 5.00 .00

.00 .00

.00 .00

.00 114.23 114.23 .79

.79 O.

0. 1900.

1900. 7.7. 22.

22. 35000.00 23.00 35000.00 12.00 4.00 70.00 70.00 70.00 69.98 100.00 100.00 29.19 29.19 2.00 2.00 .00

.00 .00

.00 26.87 26.87 107.86 107.86 .74

.74 O.

0. 1900. 7. 23.

23. .00 35000.00 11.00 4.00 71.00 71.00 71.00 70.98 100.00 100.00 29.21 29.21 2.00 2.00 .00

.00 .00

.00 87.66 87.66 109.08 109.08 .76

.76 O.

0. 1900. 7. 23.

7. 23. 1.00 35000.00 35000.00 12.00 5.00 74.00 74.00 73.78 73.68 99.00 99.00 29.21 29.21 9.00 9.00 .00

.00 .00

.00 139.02 139.02 127.50 127.50 .84

.84 O. 1900.

0. 1900. 7. 23.

7. 23. 35000.00 2.00 35000.00 12.00 6.00 77.00 75.37 74.76 93.00 93.00 29.21 29.21 .00

.00 .00

.00 .00

.00 209.57 209.57 115.90 115.90 .87

.87 O.

0. 1900.

1900. 7.7. 23.

23. 3.00 35000.00 12.00 5.00 80.00 75.28 73.47 81.00 81.00 29.20 29.20 .00

.00 .00

.00 .00

.00 255.26 255.26 119.84 119.84 .84

.84 O.

0. 1900.

1900. 7.7. 23.

23. 4.00 35000.00 11.00 4.00 83.00 83.00 75.62 72.76 72.00 72.00 29.21 29.21 .00

.00 .00

.00 .00

.00 284.78 284.78 123.89 123.89 .82

.82 O. 1900.

0. 1900. 7. 23.

7. 23. 5.00 35000.00 11.00 4.00 86.00 76.24 76 .24 72.48

72. 48 65.00 65.00 29.21 29.21 .00

.00 .00

.00 .00

.00 295.73 295.73 128.06 128.06 .81

.81 O. 1900.

0. 1900. 7. 23.

23. 35COO.00 6.00 35000.00 11.00 5.00 88.00 88.00 75.41 70.34 57.00 57.00 29.20 29.20 .00

.00 .00

.00 .00

.00 288.36 288.36 130.90 130.90 .76

.76 O. 1900.

0. 1900. 7. 23.

23. 35000.00 7.00 35000.00 10.00 6.00 88.00 74.73 69.26 69.26 55.00 55.00 29.18 29.18 .00

.00 .00

.00 .00

.00 261. 74 261.74 130.90 130.90 .73

.73 O. 1900.

0. 1900. 7. 23.

7. 23. 8.00 35000.00 35000.00 10.00 7.00 89.00 73.82 67.29 50.00 29.18 29.18 .00

.00 .00

.00 .00

.00 218.89 218.89 132.34 132.34 .69

.69 O. 1900.

0. 1900. 7. 23.

23. 35000.00 9.00 35000.00 11.00 7.00 89.00 89.00 76.26 71.28 57.00 57.00 29.16 29.16 1.00 1.00 .00

.00 .00

.00 159.41 159.41 132.56 132.56 .79

.79 O.

0. 1900. 7. 23.

7. 23. 10.00 35000.00 35000.00 11.00 7.00 89.00 76.26 76.26 71.28 57.00 57.00 29.16 29.16 1.00 1.00 .00

.00 .00

.00 96.26 96.26 132.56 132.56 .79

.79 O. 1900.

0. 1900. 7. 23.

7. 23. 11.00 35000.00 35000.00 11.00 6.00 88.00 76.73 72.42 61.00 61.00 29.17 29.17 .00

.00 .00

.00 .00

.00 33.90 33.90 130.90 130.90 .81

.81 O. 1900.

0. 1900. 7. 23.

7. 23. 35GOO.00 12.00 35000.00 10.00 10.00 5.00 5.00 87.00 76.50 72.47 72.47 63.00 63.00 29.16 29.16 .00

.00 .00

.00 .00

.00 .00

.00 129.47 129.47 .81

.81 O. 1900.

0. 1900. 7. 23.

7. 23. 35000.00 13.00 35000.00 9.00 4.00 83.00 76.18 73.60 73.60 74.00 74.00 29.16 29.16 .00

.00 .00

.00 .00

.00 .00

.00 123.89 123.89 .84

.84

o. 1900.

0. 1900. 7. 23.

7. 23. 35000.00 14.00 35000.00 9.00 4.00 80.00 74.76 72.70 72.70 79.00 79.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 119.84 119.84 .82

.82 O. 1900.

0. 1900. 7.7. 23.

23. 35000.00 15.00 35000.00 10.00 10.00 5.00 5.00 78.00 74.90 73.70 73.70 87.00 87.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 117.20 117.20 .84

.84 O. 1900.

0. 1900. 7. 23.

7. 23. 35(l00.00 16.00 35000.00 11.00 11.00 5.00 5.00 77.00 74.66 73.75 73.75 90.00 90.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 115.90 115.90 .84

.84 O. 1900.

0. 1900. 7.7. 23.

23. 35000.00 17.00 35000.00 11.00 11.00 6.00 76.00 73.69 72.76 72.76 90.00 90.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 114.61 114.61 .81

.81 O. 1900.

0. 1900. 7.7. 23.

23. 35000.00 18.00 35000.00 11.00 11.00 6.00 75.00 73.41 72.77 72.77 93.00 93.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 113.34 113.34 .81

.81 O. 1900.

0. 1900. 7. 23.

7. 23. 35000.00 19.00 35000.00 11.00 11.00 6.00 75.00 72.71 71.77 71.77 90.00 90.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 113.34 113.34 .79

.79 O. 1900.

0. 1900. 7.7. 23.

23. 20.00 35000.00 20.00 35000.00 11.00 11.00 6.00 74.00 72.43 72 .43 71.77

71. 77 93.00 93.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 112.07 112.07 .79

.79 page 99 Page

LaSalle LaSalle County County Station Station Request furfor a License Amendment to Technical Specification 3.7.3, "Ultimate Heat Heat Sink" Sink" -- Attachment Attachment 66 Station Year Station Year Month Month Day Day Hour Hour Ceiling Ceiling Wind Wind Wind Wind Drybulb Drybulb Wetbulb Wetbulb DewPI.

DewPt. Humidity Humidity Press.

Press. Cloud Cloud Freezing Freezing Rain Rain Solar Solar Atmos. Partial Partial Press.

Press.

(feet)

(feet) Direc.

Direc. V(knts)

V(knts) Temp(F)

Temp(F) Temp(F)

Temp(F) Temp(F)

Temp(F) (%)

(%) (inHG)

(inHG) Cov(.1)

Cov(.1) Precip.

Precip. Radial.

Radiat. Radiat. WaI.Vap.(inHg)

Radial. Wat.Vap.(inHg)

(Btu/ft2/hr) (Btu/ft2!hr)

(Btu/ft2/hr) (Btu/ft2/hr) 1-30day_6am 1-30day_6am O. 1900. 7.

0. 1900. 7. 23. 21.00 21.00 35000.00 11.00 11.00 6.00 6.00 73.00 73.00 72.12 72 .12 71.74

71. 74 96.00 96.00 29.20 29.20 .00

.00 .00

.00 .00

.00 .00

.00 110.82 110.82 .79

.79 O.

0. 1900.

1900. 7. 7. 23.

23. 22.00 22.00 35000.00 11.00 11.00 5.00 5.00 73.00 71.45 70.78 93.00 93.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 110.82 110.82 .76

.76 O.

0. 1900.

1900. 7. 23.

7. 23. 23.00 23.00 35000.00 11.00 11.00 6.00 6.00 72.00 72.00 71.13 70.74 96.00 96.00 29.20 29.20 .00

.00 .00

.00 .00

.00 26.53 26.53 109.58 109.58 .76

.76

.00 O.

0. 1900. 7. 24.

35000.00 1900. 7. 24. .00 35000.00 11.00 11.00 5.00 5.00 73.00 73.00 72.12 71.74 96.00 96.00 29.21 29.21 .00

.00 .00

.00 .00

.00 88.37 88.37 110.82 110.82 .79

.79 O.

0. 1900.

1900. 7.7. 24.

24. 1.00 1.00 35000.00 11.00 11.00 6.00 6.00 75.00 74.10 73.74 96.00 96.00 29.22 29.22 .00

.00 .00

.00 .00

.00 151.83 151.83 113.34 113.34 .84

.84 O.

0. 1900.

1900. 7.7. 24.

24. 2.00 2.00 35000.00 12.00 12.00 8.00 79.00 76.60 75.73 75.73 90.00 90.00 29.22 29.22 .00

.00 .00

.00 .00

.00 208.25 208.25 118.52 118.52 .90

.90 O.

0. 1900.

1900. 7.7. 24.

24. 3.00 35000.00 13.00 13.00 9.00 83.00 77.57 75.62 79.00 29.21 29.21 .00

.00 .00

.00 .00

.00 253.31 253.31 123.89 123.89 .90

.90 O.

0. 1900.

1900. 7.7. 24.

24. 4.00 35000.00 13.00 13.00 9.00 85.00 78.03 75.53 74.00 29.21 29.21 .00

.00 .00

.00 .00

.00 282.41 282.41 126.66 126.66 .90

.90 O.

0. 1900.

1900. 7.7. 24.

24. 5.00 5.00 35000.00 13.00 13.00 9.00 87.00 77.76 74.37 67.00 67.00 29.20 29.20 .00

.00 .00

.00 .00

.00 293.76 293.76 129.47 129.47 .87

.87 O.

0. 1900.

1900. 7.7. 24.

24. 6.00 35000.00 13.00 13.00 7.00 88.00 78.65 75.32 67.00 29.19 29.19 .00

.00 .00

.00 .00

.00 284.77 284.77 130.90 130.90 .89

.89 O.

0. 1900. 7. 24.

7. 24. 7.00 7.00 35000.00 13.00 13.00 8.00 89.00 78.91 75.34 65.00 65.00 29.19 29.19 .00

.00 .00

.00 .00

.00 257.74 257.74 132.34 132.34 .90

.90 O.

0. 1900.

1900. 7.7. 24.

24. 8.00 35000.00 12.00 12.00 7.00 90.00 78.48 74.31 61.00 29.18 29.18 .00

.00 .00

.00 .00

.00 214.82 214.82 133.79 133.79 .87

.87 O.

0. 1900.

1900. 7. 24.

7. 24. 9.00 9.00 35000.00 12.00 12.00 8.00 91.00 80.03 76.26 63.00 63.00 29.18 29.18 .00

.00 .00

.00 .00

.00 158.05 158.05 135.26 135.26 .92

.92 O.

0. 1900. 7. 24.

7. 24. 10.00 35000.00 12.00 8.00 91.00 80.03 76.26 63.00 63.00 29.18 29.18 .00

.00 .00

.00 .00

.00 94.76 94.76 135.26 135.26 .92

.92 O.

0. 1900.

1900. 7.7. 24.

24. 11.00 35000.00 12.00 6.00 90.00 80.77 80 .77 77.70

77. 70 68.00 29.18 29.18 .00

.00 .00

.00 .00

.00 32.17 32.17 133.79 133.79 .97

.97 O.

0. 1900.

1900. 7.7. 24.

24. 12.00 35000.00 35000.00 12.00 4.00 89.00 80.49 77.65 70.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 132.34 132.34 .96

.96 O.

0. 1900.

1900. 7. 24.

7. 24. 13.00 35000.00 35000.00 11.00 3.00 86.00 79.82 77.74 77 .74 77.00

77. 00 29.17 29.17 .00

.00 .00

.00 .00

.00 .00

.00 128.06 128.06 .96

.96 O.

0. 1900.

1900. 7.7. 24.

24. 14.00 35000.00 35000.00 10.00 3.00 84.00 79.33 77.76 82.00 29.16 29.16 .00

.00 .00

.00 .00

.00 .00

.00 125.27 125.27 .96

.96 O.

0. 1900.

1900. 7.7. 24.

24. 15.00 35000.00 35000.00 9.00 3.00 82.00 78.75 77.64 87.00 29.17 29.17 .00

.00 .00

.00 .00

.00 .00

.00 122.53 122.53 .96

.96 O.

0. 1900.

1900. 7.7. 24.

24. 16.00 35000.00 35000.00 9.00 5.00 80.00 78.31 78 .31 77.74 77 .74 93.00 29.16 29.16 .00

.00 .00

.00 .00

.00 .00

.00 119.84 119.84 .96

.96 O. 1900. 7.

0. 1900. 24.

7. 24. 17.00 35000.00 35000.00 10.00 6.00 80.00 76.82 75.67 87.00 29.17 29.17 .00

.00 .00

.00 .00

.00 .00

.00 119.84 119.84 .90

.90 O. 1900. 7.

0. 1900. 24.

7. 24. 18.00 35000.00 35000.00 11.00 5.00 79.00 75.86 74.68 87.00 87.00 29.19 29.19 .00

.00 .00

.00 .00

.00 .00

.00 118.52 118.52 .87

.87 O.

0. 1900.

1900. 7. 24.

7. 24. 19.00 35000.00 35000.00 11.00 5.00 78.00 75.63 74.74 90.00 29.21 29.21 .00

.00 .00

.00 .00

.00 .00

.00 117.20 117.20 .87

.87 O.

0. 1900.

1900. 7.7. 24.

24. 20.00 35000.00 35000.00 10.00 5.00 78.00 74.90 73.70 87.00 29.19 29.19 .00

.00 .00

.00 .00

.00 .00

.00 117.20 117.20 .84

.84 O. 1900. 7.

0. 1900. 24.

7. 24. 21.00 35000.00 35000.00 10.00 4.00 77.00 74.66 73.75 90.00 90.00 29.19 29.19 .00

.00 .00

.00 .00

.00 .00

.00 115.90 115.90 .84

.84 O.

0. 1900.

1900. 7.7. 24.

24. 22.00 35000.00 35000.00 10.00 4.00 76.00 75.09 74.74 96.00 29.18 29.18 .00

.00 .00

.00 .00

.00 .00

.00 114.61 114.61 .87

.87 O. 1900. 7.

0. 1900. 24.

7. 24. 23.00 35000.00 35000.00 10.00 5.00 75.00 75.00 75.00 100.00 100.00 29.19 29.19 .00

.00 .00

.00 .00

.00 25.36 25.36 113.34 113.34 .88

.88 O. 1900. 7.

0. 1900. 25.

7. 25. .00

.00 35000.00 10.00 6.00 76.00 75.09 74.74 96.00 96.00 29.20 29.20 .00

.00 .00

.00 .00

.00 86.80 86.80 114.61 114.61 .87

.87 O. 1900. 7.

0. 1900. 25.

7. 25. 1.00 35000.00 11.00 6.00 78.00 76.35 75.75 75.75 93.00 93.00 29.21 29.21 .00

.00 .00

.00 .00

.00 150.25 150.25 117.20 117.20 .90

.90 O. 1900. 7.

0. 1900. 25.

7. 25. 2.00 35000.00 11.00 6.00 80.00 76.82 75.67 75.67 87.00 87.00 29.20 29.20 .00

.00 .00

.00 .00

.00 207.37 207.37 119.84 119.84 .90

.90 O.

0. 1900.

1900. 7.7. 25.

25. 3.00 35000.00 11.00 6.00 83.00 78.39 76.78 82.00 82.00 29.18 29.18 .00

.00 .00

.00 .00

.00 251.83 251.83 123.89 123.89 .93

.93 O.

0. 1900.

1900. 7.7. 25.

25. 4.00 35000.00 11.00 6.00 86.00 78.95 76.50 76.50 74.00 74.00 29.18 29.18 .00

.00 .00

.00 .00

.00 280.96 280.96 128.06 128.06 .93

.93 O. 1900. 7.

0. 1900. 25.

7. 25. 5.00 35000.00 11.00 8.00 88.00 79.58 76.69 76.69 70.00 70.00 29.17 29.17 .00

.00 .00

.00 .00

.00 291. 53 291.53 130.90 130.90 .93

.93 O. 1900. 7.

0. 1900. 25.

7. 25. 6.00 35000.00 11.00 10.00 90.00 78.48 74.31 74.31 61.00 61.00 29.16 29.16 .00

.00 .00

.00 .00

.00 284.24 284.24 133.79 133.79 .87

.87 O.

0. 1900.

1900. 7. 7. 25.

25. 7.00 35000.00 11.00 10.00 91.00 77.98 73.15 57.00 57.00 29.15 29.15 .00

.00 .00

.00 .00

.00 257.66 257.66 135.26 135.26 .84

.84 O. 1900. 7.

0. 1900. 25.

7. 25. 8.00 35000.00 11.00 10.00 91.00 79.35 75.25 61.00 61.00 29.14 29.14 .00

.00 .00

.00 .00

.00 213.21 213.21 135.26 135.26 .89

.89 O. 1900. 7.

0. 1900. 25.

7. 25. 9.00 35000.00 10.00 11.00 91.00 79.35 75.25 75.25 61.00 61.00 29.12 29.12 .00

.00 .00

.00 .00

.00 157.14 157.14 135.26 135.26 .89

.89 10.00 O.

0. 1900.

1900. 7. 7. 25.

25.

35000.00 10.00 35000.00 10.00 11.00 91.00 80.03 76.26 63.00 63.00 29.12 29.12 .00

.00 .00

.00 .00

.00 93.46 93.46 135.26 135.26 .92

.92 O. 1900. 7. 25.

0. 1900. 7. 25. 11.00 35000.00 35000.00 10.00 8.00 90.00 79.14 79 .14 75.31

75. 31 63.00 63.00 29.12 29.12 .00

.00 .00

.00 .00

.00 31.26 31.26 133.79 133.79 .90

.90 O. 1900. 7.

0. 1900. 7. 25.

25. 12.00 35000.00 35000.00 9.00 6.00 88.00 79.58 76.69 70.00 70.00 29.13 29.13 .00

.00 .00

.00 .00

.00 .00

.00 130.90 130.90 .93

.93 O. 1900. 7. 25.

0. 1900. 7. 25. 13.00 35000.00 35000.00 9.00 4.00 85.00 78.89 76.77 76 .77 77.00

77. 00 29.13 29.13 .00

.00 .00

.00 .00

.00 .00

.00 126.66 126.66 .93

.93 O.

0. 1900.

1900. 7. 7. 25.

25. 14.00 35000.00 14.00 35000.00 9.00 9.00 5.00 5.00 83.00 79.19 79 .19 77.90

77. 90 85.00 85.00 29.13 29.13 .00

.00 .00

.00 .00

.00 .00

.00 123.89 123.89 .97

.97 O. 1900. 7. 25.

0. 1900. 7. 25. 15.00 35000.00 15.00 35000.00 9.00 7.00 81.00 78.55 77.71 90.00 90.00 29.12 29.12 .00

.00 .00

.00 .00

.00 .00

.00 121.18 121.18 .96

.96 O. 1900. 7. 25.

0. 1900. 7. 25. 16.00 35000.00 16.00 35000.00 9.00 9.00 7.00 81.00 77.78 76.66 87.00 87.00 29.12 29.12 .00

.00 .00

.00 .00

.00 .00

.00 121.18 121.18 .93

.93 O. 1900.

0. 1900. 7. 7. 25.

25. 17.00 35000.00 17.00 35000.00 9.00 8.00 8.00 81.00 77.01 77 .01 75.57

75. 57 84.00 84.00 29.12 29.12 .00

.00 .00

.00 .00

.00 .00

.00 121.18 121.18 .90

.90 O. 1900. 7. 25.

0. 1900. 7. 25. 18.00 35000.00 18.00 35000.00 9.00 9.00 6.00 79.00 75.86 74.68 74.68 87.00 87.00 29.14 29.14 .00

.00 .00

.00 .00

.00 .00

.00 118.52 118.52 .87

.87 O. 1900. 7. 25.

0. 1900. 7. 25. 19.00 35000.00 19.00 35000.00 10.00 10.00 7.00 78.00 75.63 74.74 74.74 90.00 90.00 29.15 29.15 .00

.00 .00

.00 .00

.00 .00

.00 117.20 117.20 .87

.87 O. 1900. 7. 25.

0. 1900. 7. 25. 20.00 35000.00 20.00 35000.00 10.00 10.00 7.00 7.00 77.00 74.66 73.75 73.75 90.00 90.00 29.13 29.13 .00

.00 .00

.00 .00

.00 .00

.00 115.90 115.90 .84

.84 O. 1900.

0. 1900. 7. 7. 25.

25. 21.00 35000.00 21.00 35000.00 10.00 10.00 8.00 8.00 76.00 74.39 73.76 73.76 93.00 93.00 29.16 29.16 .00

.00 .00

.00 .00

.00 .00

.00 114.61 114.61 .84

.84 O. 1900. 7. 25.

0. 1900. 7. 25. 22.00 35000.00 22.00 35000.00 10.00 10.00 8.00 8.00 76.00 73.69 72.76 72.76 90.00 90.00 29.16 29.16 .00

.00 .00

.00 .00

.00 .00

.00 114.61 114.61 .81

.81 O. 1900. 7. 25.

0. 1900. 7. 25. 23.00 35000.00 23.00 35000.00 11.00 11.00 7.00 76.00 74.39 73.76 73.76 93.00 93.00 29.17 29.17 .00

.00 .00

.00 .00

.00 24.66 24.66 114.61 114.61 .84

.84 O. 1900. 7. 26.

0. 1900. 7. 26. .00 35000.00

.00 35000.00 10.00 10.00 7.00 7.00 75.00 74.10 73.74 73.74 96.00 96.00 29.17 29.17 .00

.00 .00

.00 .00

.00 86.10 86.10 113.34 113.34 .84

.84 O. 1900.

0. 1900. 7. 7. 26.

26. 1.00 35000.00 1.00 35000.00 10.00 10.00 8.00 8.00 77.00 77.00 75.37 75.37 74.76 74.76 93.00 93.00 29.18 29.18 2.00 2.00 .00

.00 .00

.00 146.66 146.66 116.69 116.69 .87

.87 O. 1900. 7. 26.

0. 1900. 7. 26. 2.00 35000.00 2.00 35000.00 10.00 10.00 10.00 10.00 80.00 80.00 76.82 76.82 75.67 75.67 87.00 87.00 29.18 29.18 .00

.00 .00

.00 .00

.00 206.45 206.45 119.84 119.84 .90

.90 O. 1900. 7. 26.

0. 1900. 7. 26. 3.00 35000.00 3.00 35000.00 10.00 10.00 9.00 9.00 83.00 83.00 78.39 78.39 76.78 76.78 82.00 82.00 29.18 29.18 .00

.00 .00

.00 .00

.00 250.89 250.89 123.89 123.89 .93

.93 O. 1900. 7. 26.

0. 1900. 7. 26. 4.00 35000.00 4.00 35000.00 11.00 11.00 9.00 9.00 86.00 86.00 78.95 78.95 76.50 76.50 74.00 74.00 29.18 29.18 .00

.00 .00

.00 .00

.00 279.99 279.99 128.06 128.06 .93

.93 O. 1900.

0. 1900. 7. 7. 26.

26. 5.00 35000.00 5.00 35000.00 11.00 11.00 11.00 11.00 88.00 88.00 79.58 79.58 76.69 76.69 70.00 70.00 29.17 29.17 .00

.00 .00

.00 .00

.00 290.50 290.50 130.90 130.90 .93

.93 O. 1900. 7. 26.

0. 1900. 7. 26. 6.00 351:00.00 6.00 35uOO.00 11.00 11.00 12.00 12.00 89.00 89.00 78.91 78.91 75.34 75.34 65.00 65.00 29.16 29.16 .00

.00 .00

.00 .00

.00 282.61 282.61 132.34 132.34 .90

.90 O. 1900.

0. 1900. 7. 7. 26.

26. 7.00 35000.00 7.00 35000.00 12.00 12.00 13.00 13.00 90.00 90.00 79.15 79.15 75.31 75.31 63.00 63.00 29.15 29.15 1.00 1.00 .00

.00 .00

.00 252.89 252.89 134.02 134.02 .90

.90 O. 1900. 7. 26.

0. 1900. 7. 26. 8.00 8.00 35000.00 35000.00 13.00 13.00 13.00 13.00 90.00 90.00 79.15 79.15 75.31 75.31 63.00 63.00 29.15 29.15 1.00 1.00 .00

.00 .00

.00 209.81 209.81 134.02 134.02 .90

.90 O. 1900.

0. 1900. 7. 7. 26.

26. 9.00 35000.00 9.00 35000.00 13.00 13.00 10.00 10.00 89.00 89.00 78.26 78.26 74.36 74.36 63.00 63.00 29.14 29.14 1.00 1.00 .00

.00 .00

.00 154.55 154.55 132.56 132.56 .87

.87 Page 10 Page 10

LaSalle LaSalle County County Station Station Request Request forfor aa License License Amendment Amendment to to Technical Specification 3.7.3, "Ultimate Heat Sink" - Attachment 66 Station Year Station Year Month Month Day Day Hour Hour Ceiling Ceiling Wind Wind Wind Wind Drybuib Drybulb Wetbulb Wetbuib DewPt.

DewPt. Humidity Humidity Press.

Press. Cloud Cloud Freezing Freezing Rain Rain Solar Solar Atmos.

Atmos. Partial Partial Press.

Press.

(feet)

(feet) Direc.

Direc. V(knts)

V(knts) Temp(F)

Temp(F) Temp(F)

Temp(F) Temp(F)

Temp(F) (%)

(%) (inHG)

(inHG) Cov(.1)

Cov(.1) Precip.

Precip. Radiat.

Radiat. Radiat. Wat.Vap.(inHg)

Radiat. Wat.Vap.( inHg)

(Btu/ft2/hr) (Btu/ft2/hr)

(Btu/ft2/hr) (Btu/ft2/hr) 1-30day_6am 1-30day_6am

0. 1900.

8.00 2.00 o. 1900. 7. 7. 26.

26. 10.00

10. 00 35000.00 35000.00 14.00 14.00 8.00 89.00 89.00 78.91 78.91 75.34 75.34 65.00 65.00 29.14 29.14 2.00 .00

.00 .00

.00 90.49 90.49 133.24 133.24 .90

.90 78.91 0. 1900.

O. 1900. 7.7. 26.

26. 11.00 11.00 35000.00 35000.00 14.00 14.00 7.00 7.00 89.00 89.00 78.91 75.34 75.34 65.00 65.00 29.12 29.12 2.00 2.00 .00

.00 .00

.00 29.46 29.46 133.24 133.24 .90

.90 1900. 7.

0. 1900.

O. 7. 26.

26. 12.00 12.00 35000.00 35000.00 14.00 14.00 5.00 5.00 86.00 86.00 78.95 78.95 76.50 76.50 74.00 74.00 29.14 29.14 4.00 4.00 .00

.00 .00

.00 .00

.00 131.54 131.54 .93

.93

0. 1900.O. 1900.7. 7.26. 26. 13.00 13.00 25COO.OO 25000.00 14.00 14.00 5.00 5.00 84.00 84.00 79.33 79.33 77.76 77.76 82.00 82.00 29.15 29.15 7.00 7.00 .00

.00 .00

.00 .00

.00 135.70 135.70 .96

.96 74.90 5.00 1900. 7.

0. 1900.

O. 7. 26.

26. 14.00 14.00 35000.00 35000.00 12.00 12.00 3.00 3.00 78.00 78.00 74.90 73.70 73.70 87.00 87.00 29.17 29.17 5.00 .00

.00 .00

.00 .00

.00 122.18 122.18 .84

.84 0.

87.00 5.00 O. 1900. 7.

1900. 26.

7. 26. 15.00 15 .00 35000.00 35000 .00 11.00 11.00 2.00 77.00 73.93 72.71 87.00 29.18 29.18 5.00 .00

.00 .00

.00 .00

.00 120.83 120.83 .81

.81

0. 1900.

1.00 o. 7. 7.26.

1900. 26. 16.00 16.00 35000.00 35000.00 11.00 11.00 1.00 78.00 74.15 72.62 84.00 84.00 29.18 29.18 6.00 6.00 .00

.00 .00

.00 .00

.00 124.38 124.38 .81

.81

0. 1900.

O. 1900. 7.7. 26.

26. 17.00 17.00 35000.00 35000.00 12.00 12.00 1.00 1.00 78.00 74.90 73.70 87.00 87.00 29.19 29.19 7.00 7.00 .00

.00 .00

.00 .00

.00 126.97 126.97 .84

.84

0. 1900.

2.00 2.00 o. 7. 7.26.

1900. 26. 18.00 18.00 35000.00 35000.00 12.00 12.00 2.00 75.00 74.10 73.74 96.00 29.18 29.18 2.00 .00

.00 .00

.00 .00

.00 114.11 114.11 .84

.84 1900. 7.

0. 1900.

O. 7. 26.

26. 19.00 19.00 35000.00 35000.00 12.00 12.00 2.00 75.00 74.10 73.74 73.74 96.00 29.18 29.18 2.00 2.00 .00

.00 .00

.00 .00

.00 114.11 114.11 .84

.84 2.00 o.

0. 1900.

1900. 7. 26.

7. 26. 20.00 20.00 35COO.00 35000.00 10.00 10.00 1.00 1.00 75.00 74.10 73.74 96.00 96.00 29.18 29.18 2.00 .00

.00 .00

.00 .00

.00 114.11 114.11 .84

.84 2.00 0. 1900.

O. 1900. 7. 7. 26.

26. 21.00

21. 00 35000.00 35000.00 5.00 .00 76.00 74.39 73.76 93.00 29.18 29.18 2.00 .00

.00 .00

.00 .00

.00 115.39 115.39 .84

.84 2.00 O. 1900. 7.

0. 1900. 26.

7. 26. 22.00 22.00 35000.00 35000.00 7.00 1.00 1.00 75.00 74.10 73.74 96.00 29.18 29.18 2.00 .00

.00 .00

.00 .00

.00 114.11 114.11 .84

.84 3.00 2.00 o.

0. 1900.

1900. 7. 7. 26.

26. 23.00 23.00 35000.00 35000.00 14.00 14.00 3.00 75.00 73.41 72.77 93.00 93.00 29.19 29.19 2.00 .00

.00 .00

.00 23.46 23 .46 114.11 114.11 .81

.81 7.00 0. 1900.

O. 1900. 7.7. 27.

27. .00

.00 15000.00 15000.00 11.00 11.00 3.00 75.00 74.10 73.74 96.00 29.20 29.20 7.00 .00

.00 .00

.00 79.20 79.20 122.78 122.78 .84

.84

0. 1900.

O. 1900. 7. 7. 27.

27. 1.00 35000.00

1. 00 35000.00 5.00 4.00 76.00 75.09 74.74 96.00 29.20 29.20 5.00 5.00 .00

.00 .00

.00 141.28 141.28 119.48 119.48 .87

.87 9.00 0. 1900.

O. 1900. 7. 7. 27.

27. 2.00

2. 00 35000.00 35600.00 6.00 4.00 77.00 76.08 75.74 96.00 29.22 29.22 9.00 .00

.00 .00

.00 186.97 186.97 131.86 131.86 .90

.90 75.67 0. 1900.

O. 1900. 7. 7. 27.

27. 3.00 3.00 35COO.00 35000.00 7.00 3.00 80.00 76.82 75.67 87.00 29.21 29.21 7.00 7.00 .00

.00 .00

.00 232.93 232.93 129.82 129.82 .90

.90

0. 1900.O. 1900. 7. 7. 27.

27. 4.00

4. 00 35000.00 35000.00 16.00 9.00 78.00 77.07 76.74 96.00 96.00 29.22 29.22 10.00 .00

.00 .00

.00 237.02 237.02 137.13 137.13 .93

.93 75.00 75.00 0. 1900.

O. 1900. 7. 7. 27.

27. 5.00 5.00 35000.00 35000.00 1.00 100.00 7.00 75.00 75.00 75.00 100.00 29.22 29.22 10.00 .00 .00

.00 246.78 246.78 132.60 132.60 .88

.88

0. 1900.

O. 1900. 7. 7. 27.

27. 6.00 35000.00 6.00 35000.00 4.00 7.00 80.00 76.06 74.59 84.00 29.21 29.21 10.00 .00 .00

.00 239.58 239.58 140.22 140.22 .87

.87

0. 1900.

O. 1900. 7. 7. 27.

27. 7. 00 35000.00 7.00 35000.00 5.00 7.00 82.00 77.97 76.55 84.00 29.19 29.19 5.00 .00 .00

.00 240.94 240.94 127.74 127.74 .93

.93 o.

0. 1900.

1900. 7. 7. 27.

27. 8. 00 51\00.00 8.00 5400.00 5.00 7.00 84.00 78.51 76.59 79.00 29.18 29.18 10.00 10.00

.00

.00

.00

.00

.00 178.58 178.58 130.57 146.56 146.56 149.83

.93

.93

.96

0. 1900.

O. 1900. 7. 7. 27.

27. 9.00 15000.00 9.00 15000. 00 6.00 7.00 86.00 79.82 77.74 77.00 29.16 29.16 .00 130.57 149.83 .96 78.74 29.20 0. 1900.

O. 1900. 7. 7. 27.

27. 10.00 3900.00 10.00 7.00 6.00 85.00 80.29 78.74 82.00 29.20 10.00 .00 .00

.00 76.64 76.64 148.19 148.19 1.00 1.00

0. 1900.

O. 1900. 7. 7. 27.

27. 11.00 11.00 15000.00 15000.00 7.00 3.00 85.00 74.73 70.58 63.00 29.15 29.15 10.00 .00

.00 .00

.00 24.91 24.91 148.19 148.19 .76

.76

0. 1900.O. 1900. 7. 7. 27.

27. 12.00

12. 00 15000.00 15000.00 6.00 4.00 4.00 83.00 74.75 71.45 71.45 69.00 69.00 29.14 29.14 10.00 .00

.00 .00

.00 .00

.00 144.95 144.95 .79

.79

0. 1900.

O. 1900. 7. 7. 27.

27. 13.00

13. 00 15000.00 15000.00 5.00 6.00 82.00 75.26 72.63 74.00 74.00 29.16 29.16 10.00 .00

.00 .00

.00 .00

.00 143.36 143.36 .82

.82

0. 1900.

O. 1900. 7. 7. 27.

27. 14.00

14. 00 15000.00 15000.00 7.00 2.00 81.00 74.89 72.49 76.00 76.00 29.17 29.17 10.00 .00

.00 .00

.00 .00

.00 141. 78 141.78 .81

.81 o.

0. 1900.

1900. 7. 7. 27.

27. 15.00 15000.00 15.00 15000.00 7.00 3.00 80.00 74.76 72.70 79.00 79.00 29.19 29.19 10.00 .00

.00 .00

.00 .00

.00 140.22 140.22 .82

.82 0.

72.86 29.201900.

O. 1900. 7. 7. 27.

27. 16.00

16. 00 15000.00 15000.00 6.00 6.00 3.00 79.00 74.59 72.86 82.00 82.00 29.20 10.00 .00

.00 .00

.00 .00

.00 138.66 138.66 .82

.82

0. 1900.

O. 1900. 7. 7. 27.

27. 17.00 15000.00 17.00 15000. 00 6.00 6.00 4.00 4.00 77.00 73.94 72.71 87.00 87.00 29.21 29.21 10.00 10.00 .00

.00 .00

.00 .00

.00 135.61 135.61 .81

.81 71.64 29.20 0. 1900. 7.

O. 1900. 7. 27. 27. 18.00 15000.00 18.00 15000.00 7.00 7.00 3.00 77.00 73.20 71.64 84.00 84.00 29.20 7.00 .00

.00 .00

.00 .00

.00 125.56 125.56 .79

.79

0. 1900.

O. 1900. 7. 7. 27.

27. 19.00 35000.00

19. 00 35000.00 12.00 12.00 3.00 77.00 73.94 72.71 87.00 87.00 29.20 29.20 4.00 .00

.00 .00

.00 .00

.00 119.05 119.05 .81

.81 2.00 0. 1900.

O. 1900. 7. 7. 27.

27. 20.00

20. 35000.00 00 35000.00 13.00 13.00 2.00 76.00 72.97 71.73 87.00 87.00 29.19 29.19 10.00 10.00 .00

.00 .00

.00 .00

.00 134.10 134.10 .79

.79 72.77 0. 1900. 7.

O. 1900. 7. 27. 27. 21.00 35000.00 21.00 35000.00 7.00 7.00 1.00 75.00 73.41 72.77 93.00 93.00 29.21 29.21 10.00 10.00 .00

.00 .00

.00 .00

.00 132.60 132.60 .81

.81

0. 1900. 7.

O. 1900. 7. 27.

27. 22.00 22.00 .00

.00 7.00 7.00 1.00 1.00 74.00 73.11 72.74 72.74 96.00 96.00 29.20 29.20 9.00 9.00 .00

.00 .00

.00 .00

.00 127.50 127.50 .81

.81 72.99 29.20 0. 1900. 7.

O. 1900. 7. 27. 27. 23.00 15000.00 23.00 15000.00 9.00 9.00 2.00 73.00 73.00 73.00 72.99 100.00 100.00 29.20 9.00 9.00 .00

.00 .00

.00 21.04 21.04 126.08 126.08 .82

.82

0. 1900.

73.00 7.

O. 1900. 7. 28.28. .00 15000.00

.00 15000.00 10.00 10.00 2.00 73.00 73.00 72.99 100.00 72.99 100.00 29.21 29.21 6.00 6.00 .00

.00 .00

.00 79.32 79.32 117.60 117.60 .82

.82 72.76 0. 1900. 7.

O. 1900. 7. 28.

28. 1.00 35000.00 1.00 35000.00 10.00 10.00 2.00 76.00 73.69 73.69 72.76 90.00 90.00 29.22 29.22 5.00 5.00 .00

.00 .00

.00 140.98 140.98 119.48 119.48 .81

.81

0. 1900. 7.

O. 1900. 7. 28.28. 2.00 35000.00 2.00 35000.00 9.00 9.00 3.00 3.00 78.00 74.90 74.90 73.70 73.70 87.00 87.00 29.23 29.23 2.00 2.00 .00

.00 .00

.00 201.24 201.24 118.00 118.00 .84

.84

0. 1900. 7.

O. 1900. 7. 28. 28. 3.00 10000.00 3.00 10000.00 9.00 9.00 4.00 4.00 82.00 82.00 77.17 77.17 75.42 75.42 81.00 81.00 29.23 29.23 6.00 6.00 .00

.00 .00

.00 234.62 234.62 130.03 130.03 .89

.89

0. 1900. 7.

O. 1900. 7. 28. 28. 4.00 25000.00 4.00 25000.00 10.00 10.00 4.00 4.00 84.00 84.00 77.68 77.68 75.39 75.39 76.00 76.00 29.23 29.23 7.00 7.00 .00

.00 .00

.00 259.04 259.04 135.70 135.70 .89

.89

0. 1900. 7.

O. 1900. 7. 28. 28. 5.00 35000.00 5.00 35000.00 9.00 9.00 4.00 4.00 86.00 86.00 78.95 78.95 76.50 76.50 74.00 74.00 29.22 29.22 6.00 6.00 .00

.00 .00

.00 271.15 271.15 135.89 135.89 .93

.93 76.69 0.

O. 1900.

1900. 7. 7. 28.

28. 6.00 25000.00 6.00 25000.00 9.00 9.00 5.00 5.00 88.00 88.00 79.59 79.59 76.69 70.00 70.00 29.23 29.23 7.00 7.00 .00

.00 .00

.00 260.03 260.03 141.80 141.80 .93

.93

0. 1900. 7.

O. 1900. 7. 28. 28. 7.00 25000.00 7.00 25000.00 10.00 10.00 7.00 7.00 87.00 87.00 77.13 77.13 73.44 73.44 65.00 65.00 29.21 29.21 7.00 7.00 .00

.00 .00

.00 236.12 236.12 140.26 140.26 .84

.84

0. 1900. 7.

O. 1900. 7. 28.

28. 8.00 25000.00 8.00 25000.00 8.00 8.00 7.00 7.00 84.00 84.00 77.67 77.67 75.39 75.39 76.00 76.00 29.18 29.18 7.00 7.00 .00

.00 .00

.00 194.65 194.65 135.70 135.70 .89

.89 o.

0. 1900. 7.

1900. 7. 28. 28. 9.00 25000.00 9.00 25000.00 13.00 13.00 3.00 3.00 85.00 85.00 77.44 77.44 74.68 74.68 72.00 72.00 29.17 29.17 7.00 7.00 .00

.00 .00

.00 142.55 142.55 83.25 137.21 137.21 134.21

.87

.87

.90 75.62 0. 1900. 7.

O. 1900. 7. 28. 28. 10.00 25()00.00 10.00 25000.00 5.00 5.00 7.00 7.00 83.00 83.00 77.57 77.57 75.62 79.00 79.00 29.18 29.18 7.00 7.00 .00

.00 .00

.00 83.25 134.21 .90 0.

O. 1900.

1900. 7. 7. 28.

28. 11.00 25000.00 11.00 25000.00 6.00 6.00 6.00 6.00 83.00 83.00 77.57 77.57 75.62 75.62 79.00 79.00 29.18 29.18 7.00 7.00 .00

.00 .00

.00 25.68 25.68 134.21 134.21 .90

.90 o.

0. 1900. 7.

1900. 7. 28. 28. 12.00 15000.00 12.00 15000.00 9.00 9.00 8.00 8.00 80.00 80.00 77.57 77.57 76.72 76.72 90.00 90.00 29.15 29.15 9.00 9.00 .00

.00 .00

.00 .00

.00 136.34 136.34 128.39

.93

.93

.87 74.68 0. 1900. 7.

O. 1900. 7. 28. 28. 13.00 13.00 9~00.00 9500.00 5.00 5.00 5.00 5.00 79.00 79.00 75.86 75.86 74.68 87.00 87.00 29.17 29.17 7.00 7.00 .00

.00 .00

.00 .00

.00 128.39 .87

0. 1900. 7.

O. 1900. 7. 28. 28. 14.00 25000.00

14. 00 25000.00 5.00 5.00 6.00 6.00 76.00 76.00 73.69 73.69 72.76 72.76 90.00 90.00 29.19 29.19 7.00 7.00 .00

.00 .00

.00 .00

.00 124.16 124.16 .81

.81 o.

0. 1900. 7.

1900. 7. 28.28. 15.00 6";00.00 15.00 6400.00 6.00 6.00 7.00 7.00 76.00 76.00 75.09 75.09 74.74 74.74 96.00 96.00 29.19 29.19 7.00 7.00 .00

.00 .00

.00 .00

.00

.00 124.16 124.16 122.78

.87

.87

.81 5.00 0. 1900. 7.

O. 1900. 7. 28. 28. 16.00 16.00 6000.00 6000.00 7.00 7.00 5.00 75.00 75.00 73.41 73.41 72.77 72.77 93.00 93.00 29.18 29.18 7.00 7.00 .00

.00 .00

.00 .00 122.78 .81 0.

O. 1900.

1900. 7. 7. 28.

28. 17.00 17.00 6400.00 6400.00 8.00 8.00 3.00 3.00 75.00 75.00 73.41 73.41 72.77 72.77 93.00 93.00 29.19 29.19 7.00 7.00 .00

.00 .00

.00 .00

.00 122.78 122.78 .81

.81

0. 1900. 7.

O. 1900. 7. 28. 28. 18.00 71,00.00 18.00 7000. 00 9.00 9.00 3.00 3.00 75.00 75.00 72.71 72.71 71.77 71.77 90.00 90.00 29.18 29.18 7.00 7.00 .00

.00 .00

.00 .00

.00 122.78 122.78 .79

.79 0.

O. 1900.

1900. 7. 7. 28.

28. 19.00 19.00 3900.00 3900.00 11.00 11.00 2.00 2.00 75.00 75.00 72.71 72.71 71.77 71.77 90.00 90.00 29.19 29.19 7.00 7.00 .00

.00 .00

.00 .00

.00 122.78 122.78 .79

.79

0. 1900. 7. 28.

O. 1900. 7. 28. 20.00 4400.00 20.00 4400.00 7.00 7.00 2.00 2.00 74.00 74.00 73.11 73.11 72.74 72.74 96.00 96.00 29.18 29.18 9.00 9.00 .00

.00 .00

.00 .00

.00 127.50 127.50 .81

.81 o.

0. 1900. 7.

1900. 7. 28. 28. 21.00 35000.00 21.00 35000.00 9.00 9.00 4.00 4.00 74.00 74.00 72.43 72.43 71.77 71.77 93.00 93.00 29.18 29.18 2.00 2.00 .00

.00 .00

.00 .00

.00

.00 112.83 112.83 116.83

.79

.79

.79 0.

O. 1900.

1900. 7. 7. 28.

28. 22.00 35000.00 22.00 35000.00 11.00 11.00 2.00 2.00 74.00 74.00 72.43 72.43 71.77 71.77 93.00 93.00 29.20 29.20 5.00 5.00 .00

.00 .00

.00 .00 116.83 .79 page 11 Page 11

LaSalle LaSalle County Station Request for a License Amendment to Technical Specification Specification 3.7.3, 3.7.3, "Ultimate "Ultimate Heat Heat Sink" Sink" -- Attachment Attachment 66 Station Year Station Year Month Month Day Day Hour Ceiling Wind Wind Drybulb Drybuib Wetbulb Wetbuib DewPt. Humidity Press. Cloud Freezing Rain Solar Atmos. Partial Press.

(feet) Direc. V(knts) Temp(F) Temp(F) Temp(F) (%) (inHG) Cov(.1) Precip. Radiat. Radiat. Wat.Vap.(inHg)

(Btu/ft2/hr) (Btu/ft2/hr)

(Btu/ft2/hr) (Btu/ft2/hr) 1-30day_6am 1-30day_6am O.

0. 1900.

1900. 7. 28.

7. 28. 23.00 3900.00 12.00 4.00 73.00 73.00 73.00 72.99 72.99 100.00 100.00 29.21 29.21 9.00 9.00 .00

.00 .00

.00 20.31 20.31 126.08 126.08 .82

.82 O.

0. 1900. 7.

7. 29. .00 3700.00 13.00 8.00 73.00 73.00 72.99 100.00 100.00 29.21 29.21 9.00 9.00 .00

.00 .00

.00 75.93 75.93 126.08 126.08 .82

.82 O.

0. 1900.

1900. 7. 29.

7. 29. 1.00 35000.00 11.00 3.00 74.00 73.78 73.68 99.00 29.21 29.21 4.00 4.00 .00

.00 .00

.00 141.26 141.26 115.12 115.12 .84

.84 O.

0. 1900.

1900. 7. 29.

7. 29. 2.00 35000.00 12.00 4.00 75.00 74.10 73.74 96.00 96.00 29.21 29.21 4.00 4.00 .00

.00 .00

.00 196.19 196.19 116.42 116.42 .84

.84 O.

0. 1900.

1900. 7. 29.

7. 29. 3.00 35000.00 12.00 3.00 77.00 75.37 74.76 93.00 93.00 29.21 29.21 4.00 .00

.00 .00

.00 238.97 238.97 119.05 119.05 .87

.87 O.

0. 1900.

1900. 7. 29.

7. 29. 4.00 35000.00 13.00 3.00 79.00 76.60 75.73 90.00 29.22 29.22 5.00 5.00 .00

.00 .00

.00 263.47 263.47 123.55 123.55 .90

.90 O.

0. 1900.

1900. 7. 29.

7. 29. 5.00 35000.00 11.00 4.00 81.00 77.79 76.66 87.00 87.00 29.22 5.00 .00

.00 .00

.00 272.92 272.92 126.33 126.33 .93

.93 O.

0. 1900.

1900. 7. 29.

7. 29. 6.00 35000.00 12.00 4.00 83.00 78.39 76.78 82.00 82.00 29.21 5.00 .00

.00 .00

.00 264.48 264.48 129.16 129.16 .93

.93 O. 1900.

0. 1900. 7. 29.

7. 29. 7.00 35000.00 13.00 4.00 85.00 79.45 77.57 79.00 29.20 29.20 2.00 2.00 .00

.00 .00

.00 245.63 245.63 127.52 127.52 .96

.96 O.

0. 1900.

1900. 7. 29.

7. 29. 8.00 35000.00 14.00 4.00 86.00 80.39 78.54 79.00 29.18 4.00 4.00 .00

.00 .00

.00 198.35 198.35 131.54 131.54 .99

.99 O.

0. 1900.

1900. 7. 29.

7. 29. 9.00 35000.00 13.00 4.00 87.00 80.75 78.71 78 .71 77.00

77. 00 29.17 4.00 4.00 .00

.00 .00

.00 144.49 144.49 132.99 132.99 1.00 1.00 O.

0. 1900. 7.

7. 29. 10.00 35000.00 15.00 5.00 86.00 80.39 78.54 79.00 29.16 4.00 4.00 .00

.00 .00

.00 83.94 83.94 131.54 131.54 .99

.99 O.

0. 1900. 7.

7. 29. 11.00 35000.00 5.00 3.00 82.00 77.97 76.55 84.00 29.16 2.00 .00

.00 .00

.00 25.78 25.78 123.36 123.36 .93

.93 O.

0. 1900. 7.

7. 29. 12.00 35000.00 9.00 4.00 82.00 78.75 77.64 87.00 29.18 2.00 .00

.00 .00

.00 .00

.00 123.36 123.36 .96

.96 O.

0. 1900. 7.

7. 29. 13.00 35000.00 9.00 1.00 81.00 78.55 77.71 90.00 90.00 29.18 2.00 .00

.00 .00

.00 .00

.00 122.00 122.00 .96

.96 O.

0. 1900. 7.

7. 29. 35uOO.00 14.00 35000.00 8.00 1.00 80.00 78.31 77.74 93.00 93.00 29.20 29.20 1.00 .00

.00 .00

.00 .00

.00 120.05 120.05 .96

.96 O.

0. 1900. 7.

7. 29. 15.00 35000.00 11.00 5.00 78.00 77.07 76.74 96.00 96.00 29.21 1.00 .00

.00 .00

.00 .00

.00 117.40 117.40 .93

.93 O.

0. 1900. 7.

7. 29. 16.00 35000.00 11.00 2.00 77.00 75.37 74.76 93.00 93.00 29.23 29.23 1.00 .00

.00 .00

.00 .00

.00 116.10 116.10 .87

.87 O.

0. 1900.

1900. 7. 29.

7. 29. 17.00 35000.00 13.00 3.00 76.00 75.09 74.74 96.00 29.20 29.20 1.00 .00

.00 .00

.00 .00

.00 114.81 114.81 .87

.87 O.

0. 1900. 7.

7. 29. 18.00 35000.00 14.00 4.00 76.00 73.69 72.76 90.00 90.00 29.20 1.00 .00

.00 .00

.00 .00

.00 114.81 114.81 .81

.81 O.

0. 1900. 7.

7. 29. 19.00 35000.00 16.00 3.00 77.00 73.93 72.71 87.00 87.00 29.19 29.19 2.00 .00

.00 .00

.00 .00

.00 116.69 116.69 .81

.81 O.

0. 1900. 7.

7. 29. 20.00 35000.00 1.00 2.00 77.00 73.94 73.94 72.71 87.00 87.00 29.20 29.20 2.00 2.00 .00

.00 .00

.00 .00

.00 116.69 116.69 .81

.81 O.

0. 1900.

1900. 7. 29.

7. 29. 21.00 35000.00 35\100.00 7.00 1.00 77.00 73.94 72.71 87.00 87.00 29.20 29.20 2.00 2.00 .00

.00 .00

.00 .00

.00 116.69 116.69 .81

.81 O.

0. 1900. 7. 29.

7. 29. 22.00 35000.00 5.00 3.00 77.00 73.94 72.71 87.00 87.00 29.22 29.22 1.00 .00

.00 .00

.00 .00

.00 116.10 116.10 .81

.81 O.

0. 1900. 7. 29.

7. 29. 23.00 35000.00 7.00 1.00 75.00 73.41 73.41 72.77 93.00 93.00 29.24 29.24 1.00 .00

.00 .00

.00 21.32 21.32 113.53 113.53 .81

.81 O.

0. 1900. 7. 30.

7. 30. .00

.00 35000.00 5.00 3.00 76.00 73.69 72.76 90.00 90.00 29.24 29.24 .00

.00 .00

.00 .00

.00 82.53 82.53 114.61 114.61 .81

.81 O.

0. 1900.

1900. 7. 30.

7. 30. 1.00 35000.00 5.00 4.00 76.00 75.09 75.09 74.74 74.74 96.00 96.00 29.26 29.26 .00

.00 .00

.00 .00

.00 145.83 145.83 114.61 114.61 .87

.87 O.

0. 1900.

1900. 7. 30.

7. 30. 2.00 35000.00 6.00 4.00 77.00 77.00 77.00 77.01 100.00 29.26 29.26 .00

.00 .00

.00 .00

.00 202.02 202.02 115.90 115.90 .94

.94 O.

0. 1900.

1900. 7. 30.

7. 30. 3.00 35000.00 7.00 2.00 79.00 77.33 76.75 93.00 93.00 29.25 29.25 .00

.00 .00

.00 .00

.00 246.95 246.95 118.52 118.52 .93

.93 O.

0. 1900.

1900. 7. 30.

7. 30. 4.00 35000.00 11.00 2.00 82.00 77.18 75.42 75.42 81.00 81.00 29.26 29.26 1.00 .00

.00 .00

.00 273.66 273.66 122.74 122.74 .89

.89 O.

0. 1900. 7. 30.

7. 30. 5.00 35000.00 11.00 2.00 84.00 77.68 75.39 76.00 76.00 29.25 29.25 4.00 4.00 .00

.00 .00

.00 275.35 275.35 128.68 128.68 .89

.89 O.

0. 1900. 7. 30.

7. 30. 6.00 35000.00 6.00 2.00 85.00 75.96 72.47 67.00 67.00 29.23 29.23 4.00 4.00 .00

.00 .00

.00 268.22 268.22 130.10 130.10 .81

.81 O.

0. 1900. 7. 30.

7. 30. 7.00 35000.00 5.00 3.00 86.00 76.24 72.48 72.48 65.00 65.00 29.23 29.23 4.00 4.00 .00

.00 .00

.00 241.71 241.71 131. 54 131.54 .81

.81 O.

0. 1900.

1900. 7. 30.

7. 30. 8.00 35000.00 5.00 4.00 88.00 77.38 73.42 73.42 63.00 63.00 29.22 29.22 2.00 2.00 .00

.00 .00

.00 203.25 203.25 131.79 131.79 .84

.84 O.

0. 1900. 7. 30.

7. 30. 9.00 35000.00 5.00 3.00 88.00 78.03 74.39 74.39 65.00 65.00 29.21 29.21 1.00 .00

.00 .00

.00 149.03 149.03 131.12 131.12 .87

.87 O.

0. 1900.

1900. 7. 30.

7. 30. 10.00 35000.00 5.00 4.00 88.00 76.74 76.74 72.42 61.00 61.00 29.21 29.21 1.00 .00

.00 .00

.00 86.50 86.50 131.12 131.12 .81

.81 O.

0. 1900.

1900. 7. 30.

7. 30. 11.00 35000.00 35000.00 5.00 4.00 88.00 76.74 72.42 61.00 61.00 29.22 29.22 1.00 1.00 .00

.00 .00

.00 25.17 25.17 131.12 131.12 .81

.81 O.

0. 1900.

1900. 7. 30.

7. 30. 12.00 35000.00 35000.00 5.00 5.00 87.00 77.76 74.37 74.37 67.00 67.00 29.21 29.21 1.00 1.00 .00

.00 .00

.00 .00

.00 129.69 129.69 .87

.87 O.

0. 1900. 7. 30.

7. 30. 13.00 35000.00 35000.00 5.00 5.00 83.00 77.57 75.62 75.62 79.00 79.00 29.21 29.21 1.00 1.00 .00

.00 .00

.00 .00

.00 124.10 124.10 .90

.90 O.

0. 1900. 7. 30.

7. 30. 14.00 35000.00 5.00 5.00 81.00 78.55 78.55 77.71 77.71 90.00 90.00 29.22 29.22 1.00 1.00 .00

.00 .00

.00 .00

.00 121.39 121.39 .96

.96 O.

0. 1900.

1900. 7.7. 30.

30. 15.00 35000.00 35000.00 6.00 5.00 80.00 80.00 78.32 78.32 77.74 93.00 93.00 29.23 29.23 .00

.00 .00

.00 .00

.00 .00

.00 119.84 119.84 .96

.96 O.

0. 1900. 7. 30.

7. 30. 16.00 35000.00 35000.00 6.00 5.00 79.00 79.00 77.33 76.75 93.00 93.00 29.23 29.23 .00

.00 .00

.00 .00

.00 .00

.00 118.52 118.52 .93

.93 O.

0. 1900.

1900. 7.7. 30.

30. 17.00 35000.00 35000.00 5.00 4.00 77.00 77.00 77.01 100.00 77.01 100.00 29.23 29.23 1.00 1.00 .00

.00 .00

.00 .00

.00 116.10 116.10 .94

.94 O. 1900.

0. 1900. 7. 30.

7. 30. 18.00 35000.00 35000.00 6.00 3.00 76.00 75.77 75.69 75.69 99.00 99.00 29.25 29.25 .00

.00 .00

.00 .00

.00 .00

.00 114.61 114.61 .90

.90 O.

0. 1900.

1900. 7.7. 30.

30. 19.00 35000.00 35000.00 6.00 3.00 75.00 75.00 75.00 75.00 75.00 100.00 100.00 29.25 29.25 .00

.00 .00

.00 .00

.00 .00

.00 113.34 113.34 .88

.88 O.

0. 1900. 7. 30.

7. 30. 20.00 35000.00 5.00 3.00 75.00 75.00 75.00 75.00 100.00 100.00 29.23 29.23 .00

.00 .00

.00 .00

.00 .00

.00 113.34 113.34 .88

.88 O. 1900.

0. 1900. 7. 30.

7. 30. 35000.00 21.00 35000.00 5.00 3.00 75.00 75.00 75.00 100.00 100.00 29.24 29.24 .00

.00 .00

.00 .00

.00 .00

.00 113.34 113.34 .88

.88 O. 1900.

0. 1900. 7. 30.

7. 30. 35000.00 22.00 35000.00 5.00 4.00 74.00 74.00 73.99 100.00 73.99 100.00 29.26 29.26 5.00 5.00 .00

.00 .00

.00 .00

.00 116.83 116.83 .85

.85 O.

0. 1900.

1900. 7.7. 30.

30. 35000.00 23.00 35000.00 5.00 3.00 74.00 74.00 73.99 100.00 73.99 100.00 29.25 29.25 9.00 9.00 .00

.00 .00

.00 18.80 18.80 127.50 127.50 .85

.85 O.

0. 1900.

1900. 7.7. 31.

31. .00 35000.00 5.00 3.00 73.00 73.00 73.00 72.99 100.00 100.00 29.25 29.25 7.00 7.00 .00

.00 .00

.00 75.82 75.82 120.05 120.05 .82

.82 O. 1900.

0. 1900. 7. 31.

7. 31. 1.00

1. 00 35000.00 7.00 3.00 75.00 75.00 75.00 100.00 100.00 29.25 29.25 9.00 9.00 .00

.00 .00

.00 131.74 131.74 128.94 128.94 .88

.88 O. 1900.

0. 1900. 7. 31.

31. 2.00 35000.00 9.00 4.00 78.00 77.07 76.74 76.74 96.00 96.00 29.26 29.26 9.00 9.00 .00

.00 .00

.00 183.04 183.04 133.34 133.34 .93

.93 O. 1900.

0. 1900. 7. 31.

7. 31. 35000.00 3.00 35000.00 10.00 10.00 4.00 82.00 78.75 78 .75 77.64

77. 64 87.00 87.00 29.27 29.27 7.00 7.00 .00

.00 .00

.00 228.31 228.31 132.74 132.74 .96

.96 O. 1900.

0. 1900. 7.7. 31.

31. 4.00 35(.00.00 4.00 35l.O0.00 12.00 12.00 4.00 85.00 78.89 76.77 76.77 77.00 77.00 29.27 29.27 10.00 10.00 .00

.00 .00

.00 233.45 233.45 148.19 148.19 .93

.93 O. 1900.

0. 1900. 7. 31.

7. 31. 35000.00 5.00 35000.00 12.00 12.00 6.00 86.00 78.96 76.50 76.50 74.00 74.00 29.26 29.26 10.00 10.00 .00

.00 .00

.00 242.33 242.33 149.83 149.83 .93

.93 O. 1900.

0. 1900. 7. 31.

7. 31. 35000.00 6.00 35000.00 13.00 13.00 4.00 87.00 79.28 76.61 76.61 72.00 72.00 29.25 29.25 10.00 10.00 .00

.00 .00

.00 234.65 234.65 151.48 151.48 .93

.93 O. 1900.

0. 1900. 7.7. 31.

31. 35000.00 7.00 35000.00 14.00 14.00 3.00 88.00 79.59 76.69 76.69 70.00 70.00 29.25 29.25 10.00 10.00 .00

.00 .00

.00 211.20 211.20 153.15 153.15 .93

.93 O. 1900.

0. 1900. 7.7. 31.

31. 35000.00 8.00 35000.00 14.00 14.00 4.00 88.00 78.66 75.32 75.32 67.00 67.00 29.24 29.24 10.00 10.00 .00

.00 .00

.00 174.44 174.44 153.15 153.15 .89

.89 O. 1900.

0. 1900. 7. 31.

7. 31. 35000.00 9.00 35000.00 3.00 6.00 84.00 77.68 75.39 75.39 76.00 76.00 29.24 29.24 10.00 10.00 .00

.00 .00

.00 126.44 126.44 146.56 146.56 .89

.89 O. 1900.

0. 1900. 7. 31.

7. 31. 35()00.00 10.00 35000.00 5.00 5.00 9.00 77.00 75.37 74.76 74.76 93.00 93.00 29.23 29.23 10.00 10.00 .00

.00 .00

.00 72.59 72.59 135.61 135.61 .87

.87 O. 1900.

0. 1900. 7. 31.

7. 31. 11.00 25000.00 8.00 6.00 76.00 75.09 74.74 74.74 96.00 96.00 29.26 29.26 10.00 10.00 .00

.00 .00

.00 20.39 20.39 134.10 134.10 .87

.87 12 page 12 Page

LaSalle County Station Request for a License Amendment to Technical Specification Specification 3.7.3, 3.7.3, "Ultimate "Ultimate Heat Heat Sink" Sink" -- Attachment Attachment66 St3tion Year Month Station Year Month Day Day Hour Ceiling Wind Wind Drybuib Drybulb Wetbuib Wetbulb DewPt.

DewPI. Humidity Press. Cloud Freezing Rain Solar Atmos. Partial Press.

Press.

(feet) Direc. V(knts) Temp(F) Temp(F) Temp(F) (%) (inHG) Cov(.1) Precip. Radiat.

Radial. Radiat. WaI.Vap.(inHg)

Radial. Wat.Vap.(inHg)

(Btu/ft2/hr) (Btu/ft2/hr)

(Btu/ft2/hr) (Btulft2lhr) 1-30day_6am 1-30day_6am o.

0. 1900.

1900. 7. 31.

7. 31. 12.00 12.00 25()00.00 25 000.00 9.00 5.00 5.00 75.00 75.00 75.00 75.00 75.00 75.00 100.00 100.00 29.28 29.28 10.00 .00

.00 .00

.00 .00

.00 132.60 132.60 .88

.88 O. 1900. 7.

0. 1900. 31.

7. 31. 13.00

13. 00 12~00.00 12900.00 1.00 4.00 4.00 75.00 75.00 75.00 75.00 75.00 100.00 29.26 29.26 10.00 .00

.00 .00

.00 .00

.00 132.60 132.60 .88

.88 O. 1900. 7.

0. 1900. 31.

7. 31. 14.00 12900.00 12900.00 3.00 3.00 2.00 2.00 77.00 75.37 75.37 74.76 74.76 93.00 93.00 29.28 29.28 10.00 .00

.00 .00

.00 .00

.00 135.61 135.61 .87

.87

o. 1900. 7.

0. 1900. 31.

7. 31. 15.00 1400.00 4.00 4.00 4.00 78.00 74.90 74.90 73.70 73.70 87.00 87.00 29.30 29.30 10.00 .00

.00 .00

.00 .00

.00 137.13 137.13 .84

.84 O. 1900. 7.

0. 1900. 31.

7. 31. 16.00 1400.00 1400. 00 4.00 5.00 5.00 77.00 74.66 74.66 73.75 73.75 90.00 90.00 29.29 29.29 10.00 .00

.00 .00

.00 .00

.00 135.61 135.61 .84

.84 O. 1900. 7.

0. 1900. 31.

7. 31. 17.00

17. 00 1400.00 1.00 3.00 75.00 74.10 73.74 73.74 96.00 96.00 29.30 29.30 10.00 .00

.00 .00

.00 .00

.00 132.60 132.60 .84

.84 O.

0. 1900.

1900. 7.7. 31.

31. 18.00 18.00 2300.00 2300.00 1.00 3.00 74.00 73.11 73.11 72.74 72.74 96.00 96.00 29.29 29.29 10.00 .00

.00 .00

.00 .00

.00 131.12 131.12 .81

.81

o. 1900. 7.

0. 1900. 31.

7. 31. 19.00

19. 00 2400.00 1.00 5.00 74.00 73.11 73 .11 72.74

72. 74 96.00 96.00 29.29 29.29 10.00 .00

.00 .00

.00 .00

.00 131.12 131.12 .81

.81

0. 1900.O. 1900.

7. 7.31. 31. 20.00 2700.00 1.00 5.00 73.00 73.00 73.00 72.99 72.99 100.00 29.29 29.29 10.00 .00

.00 .00

.00 .00

.00 129.66 129.66 .82

.82

o. 1900. 7.

0. 1900. 31.

7. 31. 21.00 2900.00 1.00 5.00 73.00 72.12 72 .12 71.74

71. 74 96.00 96.00 29.29 29.29 10.00 .00

.00 .00

.00 .00

.00 129.66 129.66 .79

.79

o. 1900. 7.

0. 1900. 31.

7. 31. 22.00 1200.00 1.00 5.00 72.00 71.13 71.13 70.74 70.74 96.00 96.00 29.31 29.31 10.00 .00

.00 .00

.00 .00

.00 128.20 128.20 .76

.76

o. 1900. 7.

0. 1900. 31.

7. 31. 23.00 3300.00 1.00 5.00 71.00 67.94 66.45 66.45 86.00 86.00 29.32 29.32 10.00 .00

.00 .00

.00 17.32 17.32 126.77 126.77 .66

.66 13 page 13 Page