Text

Response to NRC Request for Additional Information for License Amendment, Request to Revise Technical Specification 3.7.9 Ultimate Heat Sink (UHS)
	ML12354A463
Person / Time
Site:	Vogtle
Issue date:	12/18/2012
From:	Ajluni M; Southern Co, Southern Nuclear Operating Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	Download: ML12354A463 (47)
	v • d • e

Mark J. Ajluni. P.E. Southern Nuclear Nuclear Licensing Director Operating Company. Inc.

40 Inverness Center Parkway Post Office Box 1295 Birmingham, Alabama 35201 Tel 205.992.7673 Fax 205 992.7885 December 18, 2012 SOUTHERN'\'

COMPANY Docket Nos.: 50-424 NL-12-2564 50-425 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, D. C. 20555-0001 Vogtle Electric Generating Plant - Units 1 and 2 Response to NRC Request for Additional Information for License Amendment Request to Revise Technical Specification 3.7.9 Ultimate Heat Sink (UHS)

Ladies and Gentlemen:

By letter dated September 1, 2011 (Agencywide Documents Access and Management System (ADAMS) Accession Number ML112450171), Southern Nuclear Operating Company (SNC) submitted a license amendment request for revision of Technical Specification (TS) 3.7.9 "Ultimate Heat Sink (UHS)."

Subsequently, by letter dated January 11, 2012 (ADAMS Accession Number ML11355A007), the NRC submitted a Request for Additional Information (RAI) to .

enable completion of the review. The SNC responses to RAls 2, 4, and 5 were provided by letter dated February 10, 2012. The response to RAI 6 was provided by letter dated April 30, 2012. Enclosure 1 of this letter provides the response to RAls 1(a), 1(b), and 3.

A calculation revision was required to provide the desired basis for the responses in Enclosure 1. Consequently, proposed TS Figure 3.7.9-1 provided in the submittal of September 1, 2011, was impacted. As a result, the new figure is being supplied in Enclosure 3 of this letter and supersedes the TS figure provided on page 3.7.9-4 in the submittal dated September 1, 2011. This proposed new TS figure incorporates the results of the analysis per Enclosure 2 (Loss of Offsite Power (LOSP) analysis) of this letter and Enclosure 5 (Loss of Coolant Accident (LOCA) w/LOSP analysis) of the September 1, 2011 submittal. of this letter provides the revised calculation supporting the proposed change in Completion Time. Enclosure 2 supersedes Enclosure 6, in its entirety, of the submittal dated September 1, 2011.

This letter does not change the conclusions of the no significant hazards evaluation for the submittal date September 1, 2011 as referenced above.

U. S. Nuclear Regulatory Commission NL-12-2564 Page 2 This letter contains no NRC commitments. If you have any questions, please contact Doug McKinney at (205) 992-5982.

Mr. M. J. Ajluni states he is Nuclear Licensing Director of Southern Nuclear Operating Company, is authorized to execute this oath on behalf of Southern Nuclear Operating Company and, to the best of his knowledge and belief, the facts set forth in this letter are true.

-fJ, Sworn to and subscribed before me this K day of De e..<:.tz.<..de R ,2012.

~ , a, ~~,

Notary Public

- My commission expires: / / /:10/15

~ ,

Respectfully submitted, M. J. Ajluni Nuclear Licensing Director MJAlCLN/lac

Enclosures:

1. Response to Request for Additional Information

2. Calculation X4C1202V70, Version 3, "NSCW Cooling Tower Operation With One Fan Out of Service at Low Ambient Wet Bulb Temperature"

3. New TS Figure 3.7.9-1 cc: Southern Nuclear Operating Company Mr. S. E. Kuczynski, Chairman, President & CEO Mr. D. G. Bost, Executive Vice President & Chief Nuclear Officer Mr. T. E. Tynan, Vice President - Vogtle Mr. B. L. Ivey, Vice President - Regulatory Affairs Mr. B. J. Adams, Vice President - Fleet Operations RType: CVC7000 U. S. Nuclear Regulatory Commission Mr. V. M. McCree, Regional Administrator Mr. R. E. Martin, I\IRR Senior Project Manager - Vogtle Mr. L. M. Cain, Senior Resident Inspector - Vogtle State of Georgia Mr. J. H. Turner, Environmental Director Protection Division

VogUe Electric Generating Plant - Units 1 and 2 Response to NRC Request for Additional Information for Amendment Request to Revise Technical Specification 3.7.9 Ultimate Heat Sink (UHSl 1

Response to Request for Additional Information to NL-12-2564 Response to Request for Additional Information Title 10 of the Code of Federal Regulations (10 CFR), Part 50, Section 50.36, Technical Specifications (TSs), requires that a Limiting Conditions for Operation (LCO) be established for a structure, system, or component that is part of the primary success path and which functions or actuates to mitigate a design basis accident or transient that either assumes the failure of or presents a challenge to the integrity of a fission product barrier. A loss of offsite power (LOSP) is one such transient that must be considered.

With respect to a LOSP, the current LCO for Technical Specification 3.7.9, "Ultimate Heat Sink" (UHS), (submitted April 26, 2004, Agencywide Documents Access and Management System (ADAMS) Accession No. ML041190306, with request for additional information (RAI) response dated April 18, 2005, ADAMS Accession No. ML051110207), accounts for a tornado induced LOSP where a missile strike damages one Nuclear Service Cooling Water (NSCW) cooling tower cell and makes it inoperable. In the License Amendment Request (LAR) dated September 1, 2011 (ADAMS Accession No. ML112450171), the licensee states that loss of an NSCW fan due to tornado is for LOSP only-not for Loss of Coolant Accident (LOCA). The Nuclear Regulatory Commission (NRC) staff concurs, but notes that the current TS LCO conservatively accounts for a LOSP, even though LOCA heat loads were used in the analYSis.

In the LAR, Southern Nuclear Operation Co., Inc. (the licensee) presented new Figure 3.7.9-1, which proposes new NSCW cooling tower fan requirements as a function of wet bulb temperature and NSCW basin temperature. This figure is based on the calculation in Enclosure 5 of the LAR. Enclosure 5 calculates UHS fan requirements using plant heat rejection rates for LOCA. However, the NRC staff does not see justification for Figure 3.7.9-1 in the LAR for a tornado induced LOSP where an additional fan cell is lost due to missile strike. The NRC staff concurs with the licensee that plant heat rejection rates for LOCA does not apply to a tornado induced LOSP, but plant heat loads for shutdown with loss of offsite power do apply. (Note the hot standby heat loads for LOSP in Enclosure 6 of the LAR are not applicable here). The NRC staff notes that Final Safety Analysis Report (FSAR) Table 9.2.5-10 provides NSCW heat loads for shutdown with LOSP.

a) Please provide justification for the proposed LCO of the LAR using heat loads for shutdown with LOSP, where only three NSCW cooling tower fans would be available to mitigate a tornado induced LOSP when operating in the four fan/spray cell required region of Figure 3.7.9-1.

b) Please provide justification for the proposed LCO of the LAR using heat loads for shutdown with LOSP, where only two NSCW cooling tower fans would be available to mitigate a tornado induced LOSP when operating in the three fan/spray cell required region of Figure 3.7.9-1.

E1 - 1 to NL-12-2564 Response to Request for Additional Information SNC Response to RAI-Hal As stated in SNC's response (NL-12-0872) dated April 30, 2012, to the NRC, "Response to NRC Request for Additional Information for License Amendment Request to Revise TS 3.7.9 Ultimate Heat Sink", a calculation revision is required to provide justification for the proposed LCO of the LAR.

Calculation X4C1202V70, Version 3, "NSCW Cooling Tower-Operation with One Fan Out of Service at Low Ambient Wet Bulb Temperature," confirms the capability of the NSCW Cooling Tower system to mitigate an LOSP with three fans operating at maximum wet bulb temperature and maximum assumed basin temperature. This calculation is submitted as Enclosure 2 to this letter. Three cooling tower fans are considered in service after an LOSP, since one fan is lost from service due to a tornado missile. This case was analyzed to demonstrate that with only three NSCW cooling tower fans operating, a tornado induced LOSP can be mitigated when operating in the four fan/spray required region of Figure 3.7.9-1 (Enclosure 3 to this letter). The resulting wet bulb temperature determined for this three fan case is based on the maximum initial temperature of the basin, which is 90°F. Any lower basin temperature would be bounded by the 90°F results. This temperature was selected since it is the maximum allowable initial basin temperature per the Technical Specification. Thus, a resulting wet bulb temperature that is greater than or equal to the maximum recorded/design basis wet-bulb temperature of 82°F for Vogtle Electric Generating Plant (VEGP) will demonstrate that three cooling tower fans can mitigate a tornado induced LOSP when operating in the four fan/spray cell region. This region is the area above the "2- Fan Op." curve in Figure Add-1 (page E2 - 16 of Enclosure 2 to this letter).

This figure also plots the change of the maximum allowable wet-bulb temperatures corresponding to a range of initial basin temperatures between 65°F to 90°F for two fans operating in the three fan region (the area below the curve).

The proposed new TS figure incorporates the results of the analysis for the LOSP case for initial basin temperatures between 65 F and 89.5 F. Between 89.5 F and 90 F, the LOCA w/LOSP analysis is limiting. Enclosure 5 of the September 1, 2011 submittal provides the LOCA w/LOSP analysis.

The results of this case, three fans operating in the four fan/spray cell region at 90°F initial basin temperature, shows that the maximum allowable wet bulb temperature is equivalent to the maximum recorded/design basis wet-bulb temperature of 82°F for VEGP. The results of this analysis provide the justification for the proposed LCO of the LAR using heat loads for shutdown to Mode 5 with LOSP, where only three NSCW cooling tower fans would be available to mitigate a tornado induced LOSP when operating in the four fan/spray cell required region of Figure 3.7.9-1 (Enclosure 3 to this letter).

The total NSCW heat loads for shutdown with LOSP used in calculation X4C1202V70, Version 3, were based on LOSP heat loads for shutdown to Mode 5 from existing calculation X4C1205V04, Version 2.0, in lieu of heat loads in Table 9.2.5-10 of the FSAR. An evaluation of the bounding heat loads to be used as the basis for the calculation revision, as well as to determine the basis for the E1 - 2 to NL-12-2564 Request for Additional Information heat loads presented in the FSAR table, was conducted. It was determined a discrepancy existed between the licensing basis calculation and Calculation X4C1205V04, Version 2.0, titled "One and Two Train Cooldown of RCS," determines cooldown rate of reactor coolant during one two train cooldown with an LOSP considered. This calculation has maintained to reflect changes in NSCW LOSP heat loads for Measurement Uncertainty Recapture (MUR) power uprate modification the plant. It was concluded from evaluation of calculation that the heat load profile presented in this version of 205V04, for shutdown to 5 with an LOSP transient, is bounding as the total NSCW LOSP heat loads. It should noted that the heat load profile used in X4C1205V04, Version 2.0 and X4C1202V70, Version 3 includes equipment not essential for plant shutdown and is, therefore, conservative.

resolve discrepancy between the calculation and FSAR (Figure 0). FSAR will be revised to the heat profile presented in calculation X4C1205V04, Version 2.0, for one and two train cooldowns of RCS with an SNC Response To RAI-1(b)

As stated in SNC's response (NL-12-0872) dated April 30, 201 to the NRC, "Response to NRC Request for Additional Information for License Amendment to TS Ultimate Heat Sink," a calculation revision is required to provide justification for proposed LCO of the LAR.

calculation is X4C1202V70, Version "NSCW Cooling Operation with One Out of at Low Ambient Wet Bulb Temperature,"

which determines the maximum allowable bulb temperature and basin temperature using a train of NSCW operating with only two cooling tower fans in 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months after an LOSP. Two (2) cooling tower fans are considered in service after an LOSP one fan is lost from service due to a tornado missile and another is also out of service for maintenance, which only two fans available for nuclear water cooling. In addition, the resulting maximum wet bulb temperature allowable for two fan operation is based on a range of realistic NSCW temperatures. Therefore, the maximum wet bulb temperature as a function of the realistic temperature. These are presented as Add-1 of the revised calculation E2 - 16 of Enclosure 2 to this which plots the change maximum allowable wet-bulb temperatures corresponding to a range of initial temperatures between to 90°F. Thus, the justification for the proposed of the using heat loads for shutdown with where only two NSCW cooling tower fans would be available to mitigate a tornado induced LOSP when operating in three fan/spray required region Figure 3.7.9-1 (Enclosure 3 to this letter), is provided in Figure Add-1. The region on or below the "2- Fan Op." curve of this figure wet-bulb temperature at a range of realistic basin temperatures two cooling tower fans would acceptable for operation; is considered the three fan/spray cell region, where one fan is lost from service to a tornado missile and one is out of due to maintenance.

-3 to NL-1 Response to Request for Additional Information total NSCW loads for shutdown with used in calculation X4C1202V70, Version 3, were on LOSP loads for shutdown to 5 from an existing calculation X4C1205V04, Version 2.0, in lieu of loads in Table 0 of the An evaluation of the bounding heat loads be used as the basis for the calculation revision, as well as to determine the basis for the loads in the table, was conducted. It was determined a discrepancy between licensing calculation FSAR.

Calculation X4C1205V04, Version 2.0, titled, and Two Cooldown RCS," determines the cooldown rate of the reactor coolant system during one and two train cooldown with a LOSP considered. This calculation been maintained to reflect changes in the NSCW LOSP heat for the MUR power uprate modification to the plant. It has been concluded from the evaluation of this calculation that heat load profile presented in this version X4C 1205V04 shutdown with a transient is bounding as total NSCW heat loads. It should be noted that the heat profile in X4C1205V04 Version 2.0, and X4C1202V70, Version 3, includes equipment essential for plant shutdown and therefore, conservative.

Corrective action is currently in discrepancy between the licensing basis calculation and the (Figure 0). will revised reflect the profile in calculation X4C1205V04, Version 2.0, for one two train cooldowns with an The has a justification in the LAR increase time (CT) to seven days for restoring a operable status as in proposed new Condition B.

licensee's justification ..."u'<",...,.

Current demonstrates that when fans/spray cells are required by proposed TS 3.7.9-1, three running spray would mitigate the most likely transient of a LOSP. Being able to mitigate a LOSP during proposed seven-day Completion provides additional assurance that the NSCW system will provide the cooling function. Enclosure 6 is a calculation supports proposed in Completion Time by the conclusion that a Loss of Offsite transient can be mitigated with fans/spray in operation.

However, Enclosure 6 uses heat to hot shutdown and not total NSCW loads for shutdown with of offsite as shown in Table 0 of the FSAR. If a LOSP occurs, it may be necessary to shutdown to Mode which has not been accounted in Enclosure 6. Please provide adequate justification for your conclusion that a LOSP transient can be mitigated with three fans/spray cells in operation when operating in Condition E1 - 4 to NL-12-2564

",en,nne>", to Request for Additional Information transient can mitigated with in proposed Condition is provided per a calculation revision that Enclosure 6 of submittal.

calculation, X4C1202V70, Version 3, "NSCW Cooling Tower-Operation with One Fan Out of Service at Low Ambient Wet Bulb Temperature," confirms capability of the NSCW Cooling Tower system to mitigate an LOSP with three fans operating at maximum bulb temperature temperature. This calculation is submitted as tower fans are in service after a since one is lost from due to a tornado This calculation determines the wet bulb temperature for this fan case on an initial basin temperature of 90°F. Any lower basin temperature would be bounded by the 90°F results. This temperature was selected, it is the maximum allowable initial temperature per the Technical Specification. Thus, a resulting wet bulb temperature that is greater or equal to the maximum recorded/design basis wet-bulb temperature of for Plant Vogtle will demonstrate that cooling tower can mitigate a induced operating in region. This is the area Fan Op." curve of Figure Add-1 of the revised calculation (page 16 of Enclosure 2 to this letter). This figure plots the of the maximum allowable wet-bulb temperatures corresponding to a range of initial basin temperatures between 65°F to for two fan in the three fan Le. which is area below curve.

of this case, operating in fan/spray at 90°F initial temperature, the maximum allowable wet bulb is equivalent to basis wet-bulb temperature of 82°F for provide the justification for the proposed of the LAR using loads for shutdown with LOSP, only three NSCW cooling tower would be available to mitigate a tornado induced LOSP when operating in the four fan/spray cell region of heat loads shutdown to Mode 5 with LOSP were on an existing calculation X4C1 Version 2.0, in of Table 9.2.5-10 of the FSAR. An evaluation of the bounding heat loads to as the basis for the calculation revision as well as to determine the for the heat loads table was conducted. It was determined that a discrepancy eXF~itea licensing basis calculation and FSAR. Calculation X4C1205V04.

titled "One and Two Cool down of determines the cooldown rate of the reactor system during one and train CO()lac)wn with a considered. This was revised to reflect in the NSCW LOSP loads for the MUR power uprate modifications to the plant. It been concluded from the evaluation of this calculation that the heat load profile presented in this version of X4C1205V04 for shutdown to Mode 5 with an transient are bounding as the total NSCW LOSP heat Thus, this heat load profile was in X4C1202V70, Version 3 that provides justification for the conclusion that a LOSP transient can be mitigated with in operation when operating in proposed Condition B. It heat used in X4C1205V04, Version 2.0 and

-5

1 to NL~12-2564 Response to Request for Additional Information X4C1202V70, Version 3 includes equipment not essential for plant shutdown and therefore, conservative.

Corrective action is currently in place to resolve discrepancy between the licensing basis calculation and the FSAR (Figure 9.2.5-10). The FSAR will be revised to reflect the heat profile presented in calculation X4C1205V04, Version 2.0, for one and two train cooldowns of RCS with an LOSP.

E1 - 6

Vogtle Electric Generating Plant - Units 1 and 2 Response NRC Request for Additional Information for Amendment Request to Revise Enclosure 2 Calculation X4C1202V70, Version 3, "NSCW Cooling Tower - Operation With One Fan Out Of Service At low Ambient Wet Bulb Temperature" to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculation Calculation Number:

X4C1202V70 Plant:

Vogtle Electric Generating Plant (VEGP)

I Unit:

01 02 1811&2

~ Discipline:

Mechanical

Title:

NSCW Cooling Tower - Operation With One Fan Out Of

Subject:

Service At Low AmbIent Wet Bulb Temperature System 1202 Purpose I Objective:

Determine the Wet Bulb (WB) temperature at which one NSCW tower fan can be removed from operation.

System or Equipment Tag Numbers:

1-1202-W4-001, 1-1202-W4-002, 2-1202-W4-001, 2-1202-W4-002 Contents Topic Page Attachments #of (Computer Printouts, Technical Papers, Sketches, Pages Correspondence)

Purpose of Calculation 1 Attachment 1 (Three Fan Tower Operation) 1 Summary of Conclusions 1,6 Attachment 2 (Two Fan Tower Operation) 1 Methodology N/A AHachment3 (ManeyTowerPerlonnance) 5 Assumptions 1 AHachment 4J2-Fan Case PDAP/UHSSIM Runs) 27 Criteria NA Attachment 5 (3-Fan Case PDAP/UHSSIM Runs) 7 Design Inputs/References 1 Appendix A (MUR Power Uprate Impacts) 2 Addendum 1 (Two Fan Tower Operation Under Body of Calculation 2-6 8 Various Wet-Bulb and Basin Temperatures)

Addendum 2 (Three Fan Tower Operation Maximum 4

Allowable Wet-Bulb Temperature)

Total # of Pages including 62 cover sheet & Attachments:

o Non-Safe Version Record Version Description PI1_ _

Originator Reviewer Approval 1 Approval 2 Prt_N_ PrtnIIHI_ PrtntedN_

No. Inltl8l I D... InltlaI/D_ Inlllllli DII1I Initial I Data 1 General editorial change for pages 1 through WRCheatwood RJBush JEFrldrlchsen

8. Revise values In Part 2 (two fan operation). NJA Revise Attachments 1 and 2. 6130/05 6130105 7/1/05 2 Incorporated MC-V"()7"()126. Revised sht1. M. D. Stephens K. Gauthaman J.A. Wade and added Appendix A. 12101108 12101/08 12105/08 N/A 3 Add Addendum 1 to evaluate two fan tower D. Zheng J. M. Jarvfs operallon under various wet-bulb and basin temperatures. Also add Addendum 2 to calaiate the maximum allowable wet-bulb

~'-

/2/10/12

. - ~'

f-z..rl "/l2 temperature for three fan tewer operation.

Notlll: UFSAR Sectioos 9.2.5-U1IImaIB Heat SIIlIr, Tedmlcal Specification-3.7.9 UllinatB Heat Sink; D~n Critefla DC-1202-A Nuclear SeIVice CcoIklg Tower. I VetSion 1 and 2 of this calculation Is needed to demonstJate thai du~ng established oold weather conditions, the NSCW cooling Wars haw sufficient cooing capacity to meet design heat Ioada wi1h one fill removed from service dlling modes 1, 2 .3, and 4. This calcu1a1lon wII be used to obtain a Ted1 Spec change.

VetSlon 3 of this calcula1lon Is needed to avaJuate the effect on the maxiroom allowable wet bulb IampeJatura using the realistic range of ililial basin tempenrtulllS and the mora realistic cooUng war curves with two fans l8II1OIIed from seMce to meet LOSP heating loads. This wrsion of the cabJlation will be used to support asubsequent TechSpecdlange.

NMP-E5-039- F01 NMP-ES-039-OO1 E2 - 1 to NL-12-2564 to for Additional Information Southern Nuclear Design Calculations Sheet:

1 of 6 1.0 PURPOSE RER 2003-0221 that determine the number of NSCW cooling tower fans required to operate in modes 1,2,3, and 4 taking into account colder atmospheric conditions which can temporarily reduce the number of fans required. This is being done to allow on-line maintenance of a fan cell during cold weather. This evaluation is needed to support a proposed change to the Technical Specifications 3.7.9 Ultimate Heat Sink.

Addendum 1, per Version 3, evaluates the effect on the maximum allowable wet bulb and initial basin temperatures under two-fan operation. Addendum 2, per Version 3, calculates the maximum allowable wet-bulb under three-fan operation. Both addendums use the more realistic cooling tower curves from Attachment 3 of X4C1202V70.

2.0

SUMMARY

OF CONCLUSIONS One fan can be removed from service during Modes 1, 2, 3 and 4 whenever the ambient wet bulb temperature, is below 63 of per Versions 1 and 2 Addendum 1 for updated wet bulb limit per Version The capacity of the cooling tower with one fewer fan will provide sufficient cooling to all normal and accident conditions. Postulated abnormal conditions and accidents include a plant cooldown with LOCA, MSLB and LOSP (during which a second fan is lost due to a missile).

Note: See Appendix A for MUR power uprate impact.

Using the two fan operation tower performance curves, Addendum 1 determines a maximum allowable wet bulb temperature for a range of initial basin temperatures for cases in which the peak basin temperature reaches 97 The duration that the basin is above 95 OF is also r"f"lrt.>rI

3.0 REFERENCES

3.1 Calculations 3.1.1 X4C1202W20 R2 Estimated NSCW temperatures during cooldown with LOSP 3.1.2 X4C1202V54 R1 Maximum Ultimate Heat Sink (Post LOCA) 3.1.3 X4C1202V20 R3 NSCW - MSLB-1 train 3.1.4 X4C1202V02 R3 NSCW cooling tower fan performance during cooldown transient after station blackout (1 fan out due to tornado) 3.1.5 X4C1202S26 R4 Ultimate Heat Sink Analysis (MC-V-07 -0009) 3.1.6 X4C1202V03 R8 Verification of NSCW Constant Heat Loads and Flows and Cooldown Heat Loads 3.1.7 X4C1205V04 R2 One and Two Train Cooldown of RCS 3.2 Manuals 3.2.1 AX4AD02-00147 R10 Instruction Manual (Marley Cooling Tower) 3.3 Design Criteria 3.3.1 DC 1202-A Rev 11 Nuclear Service Towers 3.4 Technical References 3.4.1 Mechanical nnl"<"~rlnln Reference Manual - Eighth Edition. Michael R. Lindeburg - 1990 4.0 ASSUMPTIONS

1) The tower performance curves in Marley Instruction Manual (Ref 3.2.1) provide the relationships between tower with one, two, three, or four fans in operation. It is essential to know under which tower operating conditions these curves apply. Joe Gosman of Marley and Jim Cuchens of SCS GEM Power were consulted. The required tower conditions are full water distribution and fan stacks not blocked (so that the non-operating fan stacks allow additional cooling due to natural draft).

2) Use of fewer fans at low wet bulb will not affect the inventory of NSCW water for accident scenarios. This is because the air flow will be less and correspondingly the drift loss will be less.

-2 to NL-12-2564 Response to Request for Additional Information Design Calculations - Nuclear Southern Nuclear Operating Company A Project Calculation Number Vo Ie Electric Generatin Station X4C1202V70 SubjecVTitie NSCW Cooling Tower - Operation with one fan out of service at low Sheet 2 of 6 ambient Wet Bulb Tern rature

3) Use of fewer fans at low wet bulb (WB) temperatures will not adversely affect the possibility of tower icing. During postulated accidents there could be I less fan in operation and thus less air flow through the tower to freeze water and form ice (if fans are operated manually).

4) This calculation does not provide guidance for selection of weather periods during which the wet bulb is sufficiently low to satisfy operation with a fan out for maintenance.

5.0 EVALUATION Approach The review of NSCW tower capability is to be conducted in two parts:

PART I - Evaluate three fan NSCW tower operation (one of four operating fans removed from service for maintenance)

This part of the calculation shows that the design capability of the tower with three fans operating at 67°F WB is equivalent to four fans operating at the NSCW tower design condition of 820P WB and at the specified tower heat loads provided in Design Criteria DC 1202-A Nuclear Service Cooling Towers- ref 3.3.1. This part of the calculation covers plant nonnal, shutdown, and emergency modes of operation that utilize four fans.

Calculations for postulated accidents that rely on 4 fans were reviewed.

PART 2 - Evaluate two fan NSCW tower operation (one of three operating fans removed from service for maintenance)

This part of the calculation shows the design capability of the tower with two fans operating at 63"F WB is equivalent to three fans operating at the NSCW tower design condition of 82"F WB. The condition evaluated is the case in which the plant experiences a LOSP, and after 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months of coping, one fan is unavailable because of a tornado generated missile.

PART 1 - Evaluate three fan operation.

The first step is to determine the wet bulb temperature at which three fans can provide the same CWT that four fans provide at 82° WB (which is the tower design condition). Four vendor supplied cooling tower curves are in the Marley Instruction Manual (ref 3.2.1) for the tower design flow of 15,600 gpm and ranges of 8.5.

15,25 and 37.4°. These curves are used to obtain data points below:

Range 4 fan WB 3 fan WB 8.5 82 79.3 15.0 82 76.5 25.0 82 72.0 37.4 82 66.2 E2 - 3 to NL-1L-L.,.... U"1' Response to Request Additional Information Design ......Q."'y ....... v. - Nuclear Southern Nuclear Operating Company A Project Calculation Number Vo Ie Electric Generatin Station X4C1202V70 SubjectITitie NSCW Cooling Tower - Operation with one out of service at low Sheet 3 of 6 ambient Wet Bulb Tem erature These values were in the curve on Attachment 1 which allows us to determine the acceptable wet bulb for 3 fan operation for a variety of ranges. The curve is entitled "Three Fan NSCW Tower Operation" the wet bulb for which 3 fans provide the same CWT as 4 NSCW fans at an 820P ambient wet bulb temperature.

Per Design Criteria Table 1 (ref 3.3.0, the NSCW Cooling towers at a maximum ambient wet bulb temperature of in normal. shutdown and emergency conditions. Table I lists tower information which is 'I:'.\A. below.

Tower Design criteria from DC 1202-A Nuclear Service Cooling towers I Description Normal Shutdown Design condition (Emergency)

Cooling water flow (gpm) 15,600 15,600 ]5,600 Heat Rejection ( Btu I hr) 99.9 x 101\6 140.8 x 101\6 265 x 10 1\6 MaximumWB I 82 82 82 I Cold Water temperature degrees F 90 95 95 I Range (degrees F ) * ** 34 All cases above are for tower operation with four (4) fans in operation.

The ranges for normal and shutdown conditions were not provided in so it is necessary to convert heat load to Range at the tower design NSCW flow rate of 15,600 gpm.

This is done with the formula:

Heat rate;;:; Mass flow rate (Cp) (Th -Tc)

(Mechanical Reference Manual Edition; Michael R ...u,'u.....JU - 1990, equation 11.1)

- ref. 4.4.1 In cooiing tower "1J~IU""U'U the temperature rise of the fluid is referred to as the range. Accounting for units we arrive at the Heat Load (Btu I hr) Mass flow (Gall ( 60 min I hr)( I eu ft 17.48 (llbm I .0161 Cll ft) x (1 Btu lib x. degree x Range in degrees F

The range for the Nonnal column is thus calculated to be 12.7°F

- The range for the Shutdown column is thus calculated to be 18.0 0 F

From the chart above the tower range for the emergency heat load is 34 0 F Assumptions relative to the use of tower emergency heat load of 265 million BTUs I hr are further in Note 1.

-4 to NL-12-2564 Response to Request for Additional Information Design Calculations - Nuclear Southern Nuclear Operating Company A Project Calculation Number Vo tie Electric Generatin Station X4C1202V70 SubjectfTiUe NSCW Cooling Tower - Operation with one fan out of service at low Sheet 4 of 6 ambient Wet Bulb Tem erature Using these three tower design ranges we can find the allowable wet bulb temperatures from the chart in Attachment 1. The alJowabJe wet bulb temperatures for the tower with three fans operating that match four fan operation at design conditions are as follows.

Normal 77"F wb Shutdown 75°F wb Emergency 67"F wb Based on tower data, three fans will produce the same CWT at 67"F WB that four fans can deliver at 82°F WB for the highest range which is the emergency condition. This is the bounding tower service condition for &.

removing one of four operating fans from operation.

NOTE 1 It should be noted that the NSCW tower design values do not necessarily match the conditions used in calculations that postulate the basin temperature of the ultimate heat sink (tower basin) for a plant cooldown with a LOSP, a MSLB and a LOCA for single train operation with four fans. The maximum cool down heat load of 243 million BTUslhr does not exceed the tower design heat load (sheet 31 of ref 3.1.1) and thus provides conservative results. The MSLB and LOCA however receive heat loads in excess of tower design heat load for emergencies (references, 3.1.2, and 3.1.3). For short periods of time the heat loads postulated in these analyses will exceed the tower design emergency heat load of 265 million BTUslhr. This does not introduce excessive non conservatisms because the heat load excursions are sufficiently short in duration and the temperature rise in the basin is kept low and well within design limits. I For example:

In the postulated single train LOCA accident for power uprate conditions, the maximum heat load of 440 million BTUs Ihr occurs in the first hour of the event and results in a basin temperature rise from 90°F to 92.1 OF (sheet 19 and Attachment C of ref 3.1.2.). After I hour the system heat loads fall back below the tower design heat loads. There is sufficient water volume in the basin (30.1 million pounds

- Sheet 8 of ref 3.1.2) that the NSCW basin temperature cannot rise to unacceptable temperature limits during the short time the heat load for this postulated accident exceeds the tower design heat load. The tower design heat load of 265 million BTUs I hr remains an acceptable assumption for this 3 fan wet bulb calculation.

In the postulated single train MSLB case, the heat loads vary widely above and below the tower design emergency range during the first five hours of the postulated event. The maximum heat load of 339 million BTUs Ihr occurs in the fourth hour of the event. The highest calculated basin temperature for this period is 91.1Op and occurs in the first hour (sheet 8 of ref 3.1.3). It should be noted that the maximum heat load provided for each of the first 5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months were averaged to obtain 232 million BTUs I hr. The use of the tower design emergency heat load of 265 million BTUs Ihr remains an acceptable assumption for this three fan wet bulb calculation.

For comparison, the postulated LOSP in part 2 of this calculation with I fan removed from service by a tornado results in a basin temperature of 97° for over 14 hours1.62037e-4 days 0.00389 hours 2.314815e-5 weeks 5.327e-6 months (ref 3.1.4).

E2 - 5

2 to NL-12-2564 to Request for Additional Information Design Calculations - Nuclear Southern Nuclear Operating Company . \

Calculalion Number X4C1202V10 NSCW Cooling Tower - Operation with one fan out of service at low Sheet 5 of 6 ambient Wet Bulb Tem rature PART 2 - Evaluate 2 fan operation (LOSP with tornado generated missile)

The accident case which produces the highest NSCW tower water basin is the one in which a single train of NSCW operates 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months after a LOSP with one fan lost from service due to a tornado missile.

This case is analyzed in reference 3.1.4. The referenced calculation assumes a constant ambient wet bulb temperature of 82°F.

For this evaluation we must also assume that a fan is also out of for This leaves only two fans available for Nuclear Service Cooling. We again use the Marley curves to obtain data that relates two fan operations to three fan operation.

Range 3 fan WB 2 fan WB 8.5 82 76.4 15.0 82 73.0 25.0 82 66.7 37.4 82 59.5 These values were charted on the curve in Attachment 2 to determine the wet bulb for the heat load placed on the tower from this postulated emergency.

The associated calculation (reference 3.1.4) assumes a constant 82°F wet bulb temperature. The referenced calculation uses an NSCW flow rate of 15,600 gpm. The CWT reaches a 9rF peak and the tower CWT design for 14 hours1.62037e-4 days 0.00389 hours 2.314815e-5 weeks 5.327e-6 months 6 of The calculation a maximum heat load of 235 million BTU's! hr (sheet 32 of 58). At the flow rate of (delta n of:}f).;l. 30.2°F.

As shown previously, the formula used to derive the range is :

Heat Load / hr) Mass flow (Gal/min) ( 60 min / hr)( 1 cu ft / 7.48 gal) (I Ibm I .0161 eu x Cp ( I Btu lIb x F)x in F Based on the range of:}f).;l. 30.2°, the allowable wet bulb terrtpel'atu from the Attachment 2 curve is ~

We will use the value of 63°F wet bulb for conservatism.

As a sensitivity check. we reviewed the affect of the actual NSCW system flow exceeding the gpm flow in this calculation 3.1 The Marley curves for the tower operating at a t 6,400 gpm flow rate were reviewed to determine the affect on the allowable wet bulb temperature for two fans. At the higher flow rates all curves are shifted to the right providing higher allowable wet bulb temperatures at all ranges for any number of fans. The use of 15,600 gpm as the NSCW flow rate for this calculation is conservative as it provides lower acceptable ambient wet bulb

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Project Calculation Number Vo tie Electric Generatin Station X4C1202V70 SubjecVTitle NSCW Cooling Tower - Operation with one fan out of service at low Sheet 6 of 6 ambient Wet Bulb Tern rature

6.0 CONCLUSION

Part 1 of this calculation shows that taking one of four NSCW tower fans out of service for maintenance at ambient temperatures of 67"F wet bulb or lower is acceptable for normal, shutdown and emergency plant conditions.

Part 2 of this calculation shows that taking one of three NSCW tower fans out of service for maintenance at ambient temperatures of 63°p or lower is acceptable for the LOSP in which a tornado generated missile has disabled one NSCW tower fan .

The ambient wet bulb temperature of 63°F of this calculation serves as the limiting case and will be used whenever a fan is taken from service for maintenance in Plant Operating Modes I, 2, 3, and 4.

This conclusion assumes that the fan maintenance operation does not prevent natural draft through the non operating fan. This can be done by using pickboards as opposed to decking for conducting maintenance activities. This analysis also assumes that the tower water distribution system is in nonnal operation.

7.0 AITACHMENTS 7.1 Attachment I - Three Fan NSCW Cooling Tower (1 sheet) 7.2 Attachment 2 - Two Fan NSCW Cooling Tower (I sheet) 7.3 Attachment 3 - Marley Tower Performance Curves for 15,600 gpm (4 sheets)

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Vogtle Electric Generatin~ Plant I o 1 0 2 ~ 1 &2 X4C1202V70 Appendix A I Sheet 1 of 2 MUR POWER UPRATE IMPACTS:

This calculation has been reviewed for impact due to the Measurement Uncertainty Recapture (MUR) power uprate. The uprate does not affect the flow of the NSCW system. The MUR uprate also does not affect any atmospheric conditions used in this calculation.

PART 1 The current normal condition NSCW heat load is 92.7 x 106 Btu/hr (Reference 3.1.6) . Assuming this heat load increases by 1.7% due to the MUR power uprate, the new NSCW heat load would be 94.3 x 106 BTU/hr. Part one lists a normal condition heat load of 99.99 x 106 Btu/hr. This heat load bounds the MUR uprate heat rejection of 94.3 x 106 BtU/hr. The shutdown and emergency design heat loads for part 1 are unchanged.

PART 2 Reference 3.1.4 provides the heat load during a LOSP after 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months to be 235 x 106 Btu/hr.

Due to the MUR power uprate this heat load rises to 238 x 106 Btu/hr. This affects the maximum WB which allows for 2 fan operation as follows:

Reactor Decay Heat:

Original heat load from hour 4 to hour 5 after shutdown: 126.2 x 106 BuVhr (Ref 3.1.4)

MUR uprate condition: 126.2 x 106 BuVhr X 101.7% = 128.35 106 BuVhr MUR power uprate NSCW heat load (LOSP, single train, 3 fans operational)

Heat Source Heat Load (x106 Btu/hr) Reference Spent Fuel Pool 20.66 Ref 3.1 .5 Diesel Generator 17.93 Ref 3.1.4 Containment Air cooler 5.9 Ref 3.1.4 Control Room AlC 2.74 Ref 3.1.4 EI. Emergency Room Chiller 1.47 Ref 3.1.4 Cavity Cooling Coolers 0.53 Ref 3.1.4 Pumping & System Loss 3.4 Ref 3.1.4 Reactor Thermal Mass 57.05 Ref 3.1.4 Reactor Decay Heat 128.35

Total 238.03 E2 - 8 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Unit: I Calculation Number:

I Vogtle Electric Generating Plant I 01 02 [8] 1 &2 l X4C1202V70 Appendix A I Sheet 2 of 2 Heat Load (Btulhr)

Range=

. x 60 min x 1eu ft x Mass fl ow (-gal) llbm x CP (1 btu )

nun hr 7.48 gal 0.016leuft IbxFo 238 x 106 Btu I hr Range = .

gal 60mm leuft llbm 1 btu 15600 - . x x X X nun hr 7.48 gal 0.0161euft IbxF o Range = 30.6 F ° Based on the range of 30.6 PO, the allowable wet bulb temperature from the Attachment 2 curve is 63.48 P. This calculation uses 63 po for conservatism, thus it bounds the current MUR power uprate condition. The MUR power uprate does not impact the results of this calculation.

These heat loads are for comparison purposes to demonstrate the impact of the MUR power uprate. The heat loads do not reflect design basis values.

E2 - 9

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VEGP X4C1202V70 1-1 Addendum 1: Two F. Tower Operation Under Various Wet-Bulb and Basin Temperatures 1.0 PURPOSE The Ultimate Heat Sink (UHS) evaluation in this addendum detennines the effect on the maximum allowable wet bulb temperatures basin temperatures

- a train of operating with only 2 tower service 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months after a LOSP; more cooling tower curves documented in Art. 3 of this calculation.

2.0 METHODOLOGY Main body 2 of calculation, by extrapolation of the cooling tower curves, detennines the allowable wet bulb temperature for three fan operation current Spec 3.7.9 [1]. A constant bounding heat load is in the body. The evaluation in this addendum considers the same event: a single train of the NSCW operating with only two out cooling tower fans in 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months a LOSP on the assumption that one fan is from an additional is lost to tornado The tower perfonnance (KaV/L) for operation is calculated the based on more realistic cooling tower curves documented in 3 of this calculation. Then, with the tower perfonnance characteristic time-dependent NSCW heat load, maximum allowable wet bulb temperatures are detennined by computer program UHSSIM iteratively for a of initial temperatures for cases in which the peak basin temperature stays below are Bechtel proprietary computer There are no revision associated with these two programs. validation PDAP are provided in Att. A and B of [3]. this UHS evaluation, programs were run on System IB Compaq, Pentium Microsoft Windows XP Pack 3). user completion of for the particular computer configuration prior to "u,..., ... !"! all runs. A front-end validation was perfonned by re-running the validation inputs documented identical E2 -10

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VEGP X4C1202V70 1-2 Addendum 1: Two Fan Tower Operation Under Various Wet-Bulb and Basin Temperatures 3.0 ASSUMPTIONS

1. Similar to main body part 2, a single-train ofNSCW operating with only two (2) out of four (4) cooling tower fans in service 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months after a LOSP (one fan is removed from service and an additional fan is lost due to tornado missile) is assumed for this evaluation. For 2-fan operation cases, water is expected to run through both the operating and inoperable cooling tower cells and fan stacks are not blocked. Natural drafting cooling is assumed for the inoperable cells. It is conservative to lump this case as one NSCW train with full water flow (100%

water flow rates at 15,600 gpm or 7.8E6 Ibm/hr) and reduced air flow (2 out of 4 fans at air flow rate of 2,071,121 lbm/hr per fan, or 4.14e6 Ibm/hr). See Design Input section for the listed water and air flow rates.

2. Per RER SNC442614, the bounding NSCW heat load for this two-fan operation case is provided by BC X4C1205V04, Att. AA- 3 (Reference [4]). This heat load was developed for I-train RCS cool-down under LOSP (from 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months to 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months after the transient) and already reflects the MUR power uprate. The heat load beyond 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months is linearly extrapolated to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months based on the heat load values between 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months and 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months . Since the majority of the heat load are composed of the decay heat and Spent Fuel Pool (SFP) heat load, which both decrease exponentially by time, linear extrapolation is reasonable and acceptable.

3. It is assumed that the existing cooling tower data used in att. 3 of main body, such as the NSCW pump water flow rate and tower fan perfonnance data, is valid and applicable to this UHS evaluation. The att. 3 tower data uses a nominal NSCW flow rate of 15,600 gpm and a tower design wet-bulb/dry bulblhot-water temperature of 82/95/129 OF. It is slightly different from the [2]

analysis which used tower water flow rate of 16,400 gpm and tower design point of 82/98/129 OF (sht. 21 of [2]). Per discussions in part 2 of main body (sht. 5),

the use of lower NSCW flow rate for this calculation is conservative as it provides lower acceptable ambient wet bulb temperature. Per a sensitivity run (not documented in this addendum), the sLight difference (3 OF) on the tower design dry bulb has negligible effect on wet bulb temperature.

4. The ambient dry bulb temperature is assumed to be identical to the wet bulb temperature. Wet bulb temperature is the lowest temperature that can be obtained by evaporating water into the air at a constant pressure. It is always lower than the dry bulb temperature, but will be identical with 100% relative humidity. Assuming ambient dry bulb temperature identical to the ambient wet bulb temperature conservatively maximizes the basin return temperature.

5. The ambient pressure is assumed at 14.7 psia. The variation of ambient pressure is expected to be small and the impact of ambient pressure changes is negligible.

6. The water in the basin is assumed to be pure water.

NMP-ES-039- F02 N MP-ES-039-00 1 E2 - 11

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VEGP X4C1202V70 1-3 Addendum 1: Two Fan Tower Operation Under Various Wet-Bulb and Basin Temperatures 4.0 DESIGN INPUTS The PDAP input parameters, other than stated, are per att. 3 of main body:

water flowrate = 15,600 gpm.

For a nominal water density of 62.4 Ibm/ft3, this value is converted to Ibmlhr:

15,600 gpm x (60 minlhr) x (1 ft317.4805 gal) x (62.4 Ibmlft3) = 7.80 E6 Ibmlhr air flowrate per fan = 2,071,121 Ibmlhr per sht. 9 of [2].

2,071,121 Ibmlhr x 2 fans = 4.14 E6 Ibmlhr

° solids content = ppt design pressure = 14.696 psia

design wet bulb temperature = 82 of

design dry bulb temperature = 95 of

design hot water temperature = 129 of units flag for temperature = ° standard wet bulb depression = 13 of The wet bulb depression is the difference between the dry bulb and the wet bulb temperatures. For the design conditions cited above, the wet bulb depression is 13 OF (95 - 82 OF).

Manufacturer's performance data for 2-fan operation:

Range (OF) WB (OF) Cold Water (OF) Range (OF) WBeF) Cold Water(OF) 8.5 65 80.8 25 65 97.7 8.5 70 84.2 25 70 99.6 8.5 75 87.7 25 75 101.8 8.5 80 91.3 25 80 104.2 8.5 85 95 25 85 106.6 15 65 88.9 37.4 65 104.3 15 70 91.6 37.4 70 106 15 75 94.4 37.4 75 107.8 15 80 97.3 37.4 80 109.5 15 85 100.4 37.4 85 111.4 The PDAP-calculated 2-fan tower characteristics KaV/L is 0.69. The corresponding PDAP computer input and output are provided in Attachment 4.

NMP-ES-039- F02 NMP-ES-039-001 E2 -12

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VEGP X4C1202V70 1-4 Addendum 1: Two Fan Tower Operation Under Various Wet-Bulb and Basin Temperatures The UHSSIM. input parameters are:

1st Card - Design Data: per Att. 3 of main body design wet bulb temperature = 82 of design dry bulb temperature = 95 of design hot water temperature = 129 of design pressure = 14.696 psia design solids content = o ppt units flag = o 2nd Card - Initial Conditions: per sht. 21 of [2] and Assumption 6 initial basin mass = 29,843,200 Ibm initial basin temperature = Varied between 65 of and 90 of *

Initial basin temperature is varied of 90/85/80/75/70/65 of respectively, initial solids content = 0 ppt number of towers = 1 start time = 4 hr

3rd Card - Printout Control: '

Results are printed every 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months for 68 hours7.87037e-4 days 0.0189 hours 1.124339e-4 weeks 2.5874e-5 months (between Hour-4 and Hour-72)

Time Period Data -- every 1 hr between the 4th hr and the 72nd hr after LOSP

step size, number of steps 1,68

4th Card - Tower Operation Data: Time dependent lumped tower water flow rate and fan air flow rate in lbm/hr are listed below. The cooling tower characteristics KaV/L of 0.69 is per PDAP run result aforementioned.

Tower Operating Data

5 character tower ID

time [hr], water flow rate [lbm/hr], air flow rate [lbm/hr],

KaV/L

Train A Trn A 4.0,7.80e6,4.14e6,O.69 240.0,7.80e6,4.14e6,O.69 NMP-ES-039- F02 N MP-ES-039-001 E2 -13

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VEGP X4C1202V70 1-5 Addendum 1: Two Fan Tower Operation Under Various Wet-Bulb and Basin Temperatures 5th Card - Heat Load Follows the discussion of Assumption 2, the total tower heat rejection rates for this evaluation are per Att. AA- 3 ofX4C1205V04, with linear extrapolation to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months after LOSP. Att. AA- 3 ofX4C1205V04 heat load values are condensed due to UHSSIM limit for pairs of heat rejection data.

Heat Rejection Data

time, time units (s = second, h = hour, d = day), plant heat

rejection [btu/hrj 4h, 2.5782E+08 5h, 2.4283E+08 6h, 2.3455E+08 7h, 2.2896E+08 8h, 2.l036E+08 9h, l.9697E+08 lOh, l.8700E+08 llh, 1.795IE+08 I2h, 1.7374E+08 I3h, 1.6903E+08 l4h, 1.6522E+08 I5h, 1.6203E+08 I6h, 1.593IE+08 I7h, 1.5696E+08 I8h, 1.5499E+08 19h, 1.5323E+08 20h, 1.5I64E+08 2Ih, 1.5020E+08 22h, l.4890E+08 23h, 1.4785E+08 24h, 1.4675E+08 25h, 1.4579E+08 26h, 1.4482E+08 27h, l.4384E+08 28h, 1.430IE+08 29h, 1.42I6E+08 30h, l.4I49E+08 3Ih, 1.4052E+08 32h, 1.3940E+08 33h, 1.390IE+08 34h, 1.3875E+08 35h, 1.38I9E+08 36h, 1.3742E+08 72h, 1.IE+08

6th Card - Meteorological Data:

Meteorological conditions (wet bulb temperature in of, dry bulb temperature in of, and ambient pressure in psia) are maintained constant. These values, as shown in Table Add-I, are determined iteratively to ensure the UHS basin temperature stays below 97 of.

The UHSSIM computer inputs and outputs for 2-fan cases corresponding to a range of initial basin temperatures between 65 to 90°F are provided in Attachment 4.

NMP-ES-039- F02 NMP-ES-039-001 E2 -14

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VEGP X4C1202V70 1-6 Addendum 1: Two Fan Tower Operation Under Various Wet-Bulb and Basin Temperatures 5.0 BODY OF CALCULATION Main body part 2, by ex trapolation of the cooling tower performance curves, determines the maximum allowable wet bulb temperature of 63 of. This result is based on a 2-fan operation with a bounding constant NSCW heat load and an initial basin temperature of 90 of. The UHS evaluation in this addendum uses the more realistic cooling tower performance characteristic and time-dependent NSCW heat load. The maximum allowable wet bulb temperatures are determined iteratively for a range of initial basin temperatures for cases in which the basin temperature stays below 97 of.

Table Add-l summarizes the maximum allowable wet-bulb temperatures (that ensure the basin temperature stays below 97 OF) corresponding to different initial basin temperatures.

The duration of basin temperature that exceeds 95 of is also documented in the table.

From the result table, the peak basin temperatures for different initial basin temperature cases (from 65 to 90 OF) all occur within 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months after the transient.

Table Add-l Time of Peak Basin Initial Basin Maximum Duration Basin Temperature Temperature Allowable Wet-Bulb Temperature over 95 OF (OF) (OF) (hr) (hr) 65 72.6 27 54 70 72.3 26 54 75 71.7 23 52 80 71 20 50 85 69.7 17 45 90 66.8 13 31 Figure Add-l plots the change ofthe maximum allowable wet-bulb temperatures corresponding to a range of initial basin temperatures between 65 to 90°F. The main body (MB) part 2 wet bulb temperature result of 63 OF is also plotted for comparison purposes.

NMP-ES-039- F02 NMP-ES-039-00 1 E2 -15

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VEGP X4C1202V70 1-7 Addendum 1: Two Fan Tower Operation Under Various Wet-Bulb and Basin Temperatures l-L()

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VEGP X4C1202V70 1-8 Addendum 1: Two Fan Tower Operation Under Various Wet-Bulb and Basin Temperatures

6.0 REFERENCES

[1] Vogtle Units 1 and 2 Technical Specification 3.7.9, "Ultimate Heat Sink (DHS)",

Amendment No. 167 (Unit 1) and Amendment No. 149 (Unit 2).

[2] SNC Calculation X4C1202V54, Ver. 2, "Maximum Ultimate Heat Sink Temperature (post LOCA)".

[3] SNC Calculation X4C 1202S26, Ver. 5, "Ultimate Heat Sink Analysis".

[4] SNC Calculation X4C1205V04, Ver. 2, "One and Two Train Cooldown ofRCS".

7.0

SUMMARY

OF CONCLUSIONS Figure Add-l determines the maximum allowable wet bulb temperature for a range of initial basin temperatures for cases in which the peak basin temperature stays below 97 OF.

This addendum still uses conservative assumptions and increased heat loads for MUR.

The improvement for this 2-fan tower operation case as compared to wet bulb temperature result in part 2 of main body are due to:

- the more realistic cooling tower performance curve (2-fan tower operation)

- the time-dependent NSCW heat load for LOSP

- the dynamic simulation of cooling tower performance using PDAP and UHSSIM

- the benefit from a lower initial basin temperature (NSCW basin temperature normally operates well below 90 OF)

NMP-ES-039- F02 N MP-ES-039-00 1 E2 -17

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VEGP X4C1202V70 2-1 Addendum 2: Three Fan Tower Operation Maximum Allowable Wet-Bulb Temperature 1.0 PURPOSE This addendum calculates the three fan tower operation maximum allowable wet-bulb temperature for an UHS basin initial temperature of90 of, using the cooling tower basin simulation programs PDAPIUHSSIM , and more realistic cooling tower curves in Att. 3.

2.0 METHODOLOGY Other than stated, the methodology used in this addendum are similar to Addendum 1.

The cooling tower performance characteristic (KaV/L) for 3-fan operation is calculated using PDAP based on the 3-fan tower performance curves in Att. 3 of this calculation.

Then, with the tower performance characteristic and time-dependent NSCW heat load, the maximum allowable wet bulb temperatures are determined by UHSSIM iteratively for cases in which the peak basin temperature stays below 97 of.

3.0 ASSUMPTIONS Other than stated, the assumptions used in this addendum are similar to Addendum 1.

Similar to main body part 1, a single-train ofNSCW operating with three (3) out of four (4) cooling tower fans in service 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months after a LOSP (one fan is removed from service) is assumed. The initial basin temperature is assumed at 90 of.

PDAP and UHSSIM were run on Bechtel System FREDB40349B (HP Compaq, Pentium 4, Microsoft Windows XP Professional, Service Pack 3). A front-end validation was performed by re-running the validation inputs documented in [3] and obtained identical results.

4.0 DESIGN INPUTS The PDAP input parameters, other than stated, are per 3-fan tower operation curves in att. 3 of this calculation:

water flowrate = 15,600 gpm.

For a nominal water density of 62.4 Ibm/ft 3, this value is converted to lbm/hr:

15,600 gpm x (60 minlhr) x (1 ft317.4805 gal) x (62.4 Ibm/ft3) = 7.80 E6 Ibm/hr

air flowrate per fan = 2,071,121 Ibm/hr per sht. 9 of [2].

2,071,121 Ibm/hr x 3 fans = 6.21 E6 Ibm/hr

solids content = 0 ppt

design pressure = 14.696 psia

design wet bulb temperature = 82 of

design dry bulb temperature = 95 of

design hot water temperature = 129 of

units flag for temperature = 0

standard wet bulb depression = 13 of NMP-ES-039- F02 NMP-ES-039-001 E2 -18

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VEGP X4C1202V70 2-2 Addendum 2: Three Fan Tower Operation Maximum Allowable Wet-Bulb Temperature The wet bulb depression is the difference between the dry bulb and the wet bulb temperatures. For the design conditions cited above, the wet bulb depression is 13 of (95 - 82 OF).

Manufacturer's performance data for 3-fan operation:

Range (OF) we (oF) Cold Water (OF) Range (OF) we (OF) Cold Water (OF) 8.5 65 75.8 25 65 89.1 8.5 70 79.5 25 70 91.6 8.5 75 83.2 25 75 94.1 8.5 80 87.3 25 80 97 8.5 85 91.1 25 85 100 15 65 82 37.4 65 95 15 70 85 37.4 70 97 15 75 88.3 37.4 75 99.1 15 80 91.8 37.4 80 101.4 15 85 95.1 37.4 85 104 The PDAP-calculated 3-fan tower characteristics KaV/L is 0.86. The corresponding PDAP computer input and output are provided in Attachment 5.

The UHSSllv1 input parameters are:

1st Card - Design Data: per Att. 3 design wet bulb temperature = 82 of design dry bulb temperature = 95 ~

design hot water temperature = 129 ~

design pressure = 14.696 psia design solids content = o ppt units flag = o

2nd Card -Initial Conditions: per sht. 21 of [2] and Assumption 6 of Add. 1 initial basin mass = 29,843,200 Ibm initial basin temperature = 90 of initial solids content = 0 ppt number of towers = 1

~~ti~= 4 ~

3rd Card - Printout Control:

Results are printed every 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months for 68 hours7.87037e-4 days 0.0189 hours 1.124339e-4 weeks 2.5874e-5 months (between Hour-4 and Hour-72)

Time Period Data -- every 1 hr between the 4th hr and the 72nd hr after LOSP

step size, number of steps 1, 68

4th Card - Tower Operation Data: Time dependent lumped tower water flow rate and fan air flow rate in lbm/hr are listed below. The cooling tower characteristics KaV/L 0[0.86 is per PDAP run result (PDAP3-J.out) in Att.5.

Tower Operating Data

5 character tower ID NMP-ES-039- F02 NMP-ES-039-001 E2 -19

Enclosure 2 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculation Plant: Calculation Number: I Sheet:

VEGP I X4C1202V70 2-3 Addendum 2: Three Fan Tower Operation Maximum Allowable Wet-Bulb Temperature

time [hr], water flow rate [lbm/hr], air flow rate [lbm/hr],

KaV/L

Train A Trn A 4.0,7.S0e6,6.2le6,O.S6 240.0,7.80e6,6.2Ie6,O.86

5th Card - Heat Load Similar to Assumption 2 of Adendum 1, the total tower heat rejection rates for this addendum are per Att. AA- 3 ofX4C1205V04, with linear extrapolation to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months after LOSP. Art. AA- 3 ofX4C1205V04 heat load values are condensed due to UHSSIM limit for pairs of heat rejection data.

Heat Rejection Data

time, time units (s = second, h = hour, d = day), plant heat

rejection [btu/hr]

4h, 2.S7S2E+OS Sh, 2.4283E+08 6h, 2.34SSE+OS 7h, 2.2896E+08 8h, 2.I036E+08 9h, 1.9697E+08 lOh, 1.8700E+08 llh, 1.79SIE+08 I2h, 1.7374E+08 I3h, 1.6903E+08 I4h, 1.6S22E+08 ISh, 1.6203E+OS I6h, I.S93IE+08 I7h, I.S696E+OS ISh, 1.S499E+08 I9h, I.S323E+08 20h, 1.SI64E+08 2Ih, I.S020E+08 22h, 1.4890E+OS 23h, 1. 478SE+08 24h, 1.467SE+OS 25h, 1.4579E+OS 26h, 1.4482E+OS 27h, 1.4384E+OS 2Sh, 1.430IE+08 29h, 1.42I6E+08 30h, 1.4I49E+OS 3lh, l.4052E+OS 32h, l.3940E+OS 33h, l.390IE+OS 34h, l. 38 75E+08 35h, 1.3Sl9E+OS 36h, l.3742E+08 72h, l.lE+08

6th Card - Meteorological Data:

Similar to Addendum 1, meteorological conditions are maintained constant.

These values are determined iteratively to ensure the basin temperature stays below 97~.

NMP-ES-039- F02 NMP-ES-039-001 E2 -20

Enclosure 2 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculation PI'a nt: Calculation Number: I Sheet:

VEGP I X4C1202V70 2-4 Addendum 2: Three Fan Tower Operation Maximum Allowable Wet-Bulb Temperature

Ambient Data Supplied by Bechtel Power Corp.

TIME WB DB P

(hr) (F) (F) (psia) 4, 82.1, 82.1, 14.7 72, 82.1, 82.1, 14.7 The UHSSIM inputs and outputs for 3-fan case with initial basin temperature of90 OF (Fan3N_90F) are provided in Attachment 5.

5.0 BODY OF CALCULATION Main body part 1, by extrapolation ofthe cooling tower performance curves, determines the 3-fan operation maximum allowable wet bulb temperature of67 OF. This result is based on a 3-fan operation with a bounding constant NSCW heat load and an initial basin temperature of 90 OF. The UHS evaluation in this addendum uses the more realistic cooling tower performance characteristic and time-dependent NSCW heat load. The maximum allowable wet bulb temperatures are determined iteratively for cases in which the basin temperature stays below 97 OF. Per Attachment 5 results, the three fan tower operation maximum allowable wet-bulb temperature is 82.1 OF (peak basin temperature of96.9 OF @ Hour-14) for an UHS basin initial temperature of90 OF. The duration of basin temperature that exceeds 95 OF is 43 hours4.976852e-4 days 0.0119 hours 7.109788e-5 weeks 1.63615e-5 months (between Hour-7 and Hour-50).

6.0 REFERENCES

The references used in this addendum are the same as Addendum 1.

7.0

SUMMARY

OF CONCLUSIONS The three fan tower operation maximum allowable wet-bulb temperature is 82.1 OF for an UHS basin initial temperature of90 OF.

NMP-ES-039- F02 N MP-ES-039-00 1 E2 - 21 to NL-12-2564 Response to Request for Additional Information Attachment 1 Calculation X4C1202V70 Emerg. Emerg. Emerg. Emerg.

Max. Temp Range Constant Constant Scaled Scaled Temp Range Temp Temp Range 82.00 79.30 8.50 34.00 67.80 60.00 0.00 82.00 76.50 15.00 34.00 67.80 62 .00 15.00 82.00 72.00 25.00 34.00 67.80 65.00 25.00 82.00 66.20 37.40 34.00 67.80 67.80 34.00 3 Fan NSCW Cooling Tower 40.00 35.00 ,.-_.. ***_ **_**_***..__****- - *1I i -+- Temp. Profile I

~ 30.00 c: :: - Em Const Rng II.

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.... 10.00 5.00 0.00 60.00 65.00 70.00 75.00 80.00 85.00 Temperature E2 - 22 to NL-12-2564 Response to Request for Additional Information Attachment 2 Calculation X4C1202V70 cmerg. Emerg. Emerg . Emerg.

Temp Range Constant Constant Scaled Scaled Range Temp Temp Range 76.40 8.50 30.20 63.70 55.00 0.00 73.00 15.00 30.20 63.70 59.00 15.00 66.70 25.00 30.20 63.70 62.00 25.00 59.50 37.40 30.20 63.70 63.70 29.70

£ 2 Fan NSCW Cooling Tower 40.00 .,

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I- 10.00 5.00 0.00 55.00 60.00 65.00 70.00 75.00 80.00 Temperature E2 - 23 to NL-12-2564 Response to Request for Additional Information Calculation X4C 1202V70 Attachment 3 Marley cooling tower performance curves at 15,600 gpm - pages 1-4 E2 - 24 to NL-12-2564 Response to Request for Additional Information

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E2 - 28 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 lof27 ATTACHMENT 4 2-Fan Case PDAPIUHSSIM Runs Attachment 4 Table of Contents Page No.

lo PDAP input/output for pdap2-2, CIT characteristics for 2-Fan Case . . . . . . . . . . . . . . . . . . . . . 2

2. UHSS1M input/output for Fan2N 90F, 2-Fan Case with 1BT of 90 of . ..................... 4

3. UHSS1M input/output for Fan2N BSF, 2-Fan Case with 1BT of 85 of . ............. .. ...... 8

4. UHSS1M input/output for Fan2N BOF, 2-Fan Case with 1BT of 80 of . . ............ .. ..... 12

5. UHSS1M input/output for Fan2N 7SF, 2-Fan Case with 1BT of 75 of . ............ . . ...... 16

6. UHSS1M input/output f or Fan2N 70F, 2-Fan Case with 1BT of 70 of . .. . . ........... . .... 20

7. UHSS1M input/output for Fan2N 6SF, 2-Fan Case with 1BT of 65 of . .... .... . ........... 24 NMP-ES-039- F02 E2 - 29 NMP-ES-039-00 1 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 20f27

1. PDAP input/output f o r pdap2-2., CI T c haracteristics for 2-Fan Case pdap2-2 . inp

Vogtle Ci T Performance Data Per X4C1202V70, Ver 2

original water fl o w rate & 2 fan operation nl00% water flow rate = 15,600 gpm = 7 . 8e6 lbm/hr nair flow rate = 2

2,071,121 lbm/hr = 4 . 14e6 lbm/ hr noriginal design point: twb = 82 F, tdb = 95 F, tw = 129 F 7.8e 6 , 4.14e6, 0 . 0, 14 . 696, 82, 95, 129, 0, 13.0 8 . 5, 65, 80.8 8 . S, 70, 84.2 8 . 5, 7S, 87.7 8 . 5, 80, 91.3 8 . S, 85, 9S.0 15.0, 6S, 8 8.9 15 . 0, 70, 91.6 lS . 0, 75, 94 . 4 15.0, 80, 97 . 3 15.0, 85, 100.4 2S.0, 6S, 97.7 25.0, 70, 99.6 2S.0, 7S, 101.8 2S . 0, 80, 104.2 25.0, 85, 106.6 37 . 4, 65, 104.3 37 . 4, 70, 106 . 0 37.4, 75, 107.8 37.4, 80, 109 . 5 37.4, 85, 111.4 NMP-ES-039- F02 E2 - 30 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 30f27 pdap2-2.out

Vogtle CIT Performance Data Per X4C1202V70, Ve r 2

origina1 water flow rate & 2 fan operation

100% water flow rate = lS,600 gpm = 7.8e6 lbm/hr

air flow rate = 2

2,071,121 lbm/ hr = 4 . 14e6 lbm / hr

original design point: twb = 82 F, tdb = 9S F, tw = 129 F 7.8e6, 4 . 14e6, 0.0, 14.696 , 82, 9S, 129, 0, 13.0 8.S, 6S, 80.8

8. S , 70, 84.2 8.S, 7S, 87.7 8.S, 80, 91.3 8.S, 8S, 9S.0 lS.0, 6S, 88.9 lS.0, 70, 91.6 lS . 0, 7S, 94.4 lS . 0, 80, 97 . 3 lS.0, 8S, 100.4 2S.0, 6S, 97.7 2S.0, 70, 99.6 2S . 0, 7S, 101.8 2S.0, 80, 104.2 2S.0, 8S, 106 . 6 37.4, 6S, 104.3 37 . 4, 70, 106.0 37 . 4, 7S, 107 . 8 37.4, 80, 109.S 37.4, 8S, 111.4

KaV/ L = . 69

results: range, wb, hot, cold, cold-predicted, difference

8.S 6S.0 89 . 3 80 . 8 81.4 .6

8.S 70.0 92 . 7 84 . 2 84 . 7 .S

8.S 7S.0 96.2 87.7 88 . 1 .4

8.S 80 . 0 99.8 91.3 91.6 .3

8.S 8S.0 103.S 9S.0 9S . 2 .2

lS . 0 6S . 0 103.9 88.9 89 . 6 .7

15.0 70 . 0 106 . 6 91.6 92 . 2 .6

15 .0 7S . 0 109 . 4 94 . 4 94.9 .5

lS.0 80 . 0 112 . 3 97.3 98.1 .8

lS.0 8S.0 115.4 100.4 101 . 0 .6

25.0 65.0 122 . 7 97.7 98.1 .4

2S.0 70.0 124.6 99.6 99.9 .3

2S.0 7S.0 126.8 101.8 102.0 .2

2S.0 80.0 129.2 104 . 2 104 . 2 .0

2S.0 85.0 131.6 106.6 106.S -.1

37.4 6S.0 141 . 7 104.3 104 . 2 - .1

37.4 70 . 0 143 . 4 106.0 10S.8 - .2

37.4 75.0 14S.2 107 . 8 107.4 - .4

37.4 80.0 146 . 9 109 . S 109.1 -.4

37.4 85.0 148.8 111.4 111.0 -.4 Stop - Program terminated.

NMP-ES-039- F02 E2 - 31 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 4of27

2. UHSSIM input/output for Pan2N 90F, 2-Fan Case with IBT of 90 of Fan2N_9 0F. inp Vogtle UHS 2-Fan in - Service Case with 9 0 F initial basin temperature

Mixed Ci T model of 2 operable (full speed) and 2 failure fans w/ natural draft

initial basin temp. = 90 F, Max basin temp. < 97 F

PDAP CIT characteristics KaV/L = 0 . 69 per tower performance data X4C1202V70 V2

CiT bounding heat load for I-train LOSP per Appendix AA of X4C1205V04 V2 (MUR)

HL beyond Hr-36 are extrapolated to Hr-72. 68 hr UHSS1M run time (Hr Hr-72)

design wet-bulb temperature [F], design dry-bulb temperature [F],

design hot-water temperature [F), design pressure [psia), design solids [ppt]

0 => F, psia, btu/hr, Ibm/hr units 82, 95, 129.0, 14.696, 0. 0, 0

>> initial basin mass [Ibm], initial basin temperature [F], initial solids [ppt] ,

number of t owers , starting time o f simulation [hrJ 298432 00, 90, 0, 1, 4.

>> Time Period Data - - every 1 hr between the 4th hr and the 72nd hr after LOSP

step size, number of steps 1,68

Tower Opera ting Data

5 character tower 1D

>> time [hr] , water flow rate [lbm/hrJ, air flow rate [lbm/hrJ, Ka V/L

Train A Trn A 4.0,7 . 80e6,4.14e6,0.69 72.0,7 . 80e6,4 . 14e6 ,0.69

>> Heat Rejection Data

time, time units (s second, h hour, d day), plant heat

rejection [btu/hrJ 4h, 2. 5782E+08 5h, 2 . 4283E+08 6h, 2. 3455E+08 7h , 2.2896E+08 8h, 2.1036E+08 9h, 1.9697E+08 10h, 1.8700E+08 Ilh, 1 .795 1E+08 12h , 1 . 7374E+08 13h, 1.6903E+08 14h, 1.6522E+08 15h, 1.6203E+08 16h, 1.5931E+08 17h, 1. 56 96E+08 18h, 1.5499E+08 19h, 1.5323E+08 20h, 1 . 5164E+08 21h, 1.5020E+08 22h, 1.4890E+08 23h, 1 . 4785E+08 24h, 1 . 4675E+08 25h, 1.4579E+08 26h, 1.4482E+08 27h, 1 . 4384E+08 28h, 1.4 30 1E+08 29h, 1.4216E+08 30h, 1.4149E+08 31h, 1.40S2E+08 32h, 1 . 3940E+08 33h, 1.3901E+08 34h, 1.3875E+08 35h, 1.3819E+08 36h, 1.3742E+08 72h, 1.1E+08

>> Ambient Data Supplied by Bechtel Power Corp.

TIME WB DB P

(hr) (F) (F) (psia) 4, 66 .8, 66 . 8, 14.7 72, 66.8, 66.8, 14.7 NMP-ES-039- F02 E2 - 32 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 50f27 Pan2N 90P.out Vogtle UHS 2-Fan in-Service Case with 90 F initial basin temperature Initial Basin Mass 2.9S4E+07 lbm Initial Basin Temperature 90.0 F Initial Basin Solids .0 ppt time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr] [lbm] [F] [ppt] [F] [E'] [btu/hr] [lbm/hr] [lbm/hr] [ -]

4.0 2 . 9S4E+07 90.0 .0 66.S 66.S 2.57SE+OS Trn A 7.S00E+06 4 . 14 OE+06 .69 5.0 2 . 969E+07 92.0 .0 66.S 66.S 2.42SE+OS Trn A 7.S00E+06 4 . 140E+06 . 69 6.0 2.953E+07 93 . 5 .0 66.S 66.S 2.346E+OS Trn A 7.S00E+06 4.140E+06 .69 7.0 2.937E+07 94 . 7 .0 66.S 66.S 2.290E+OS Trn A 7.S00E+06 4.140E+06 . 69 S.O 2.921E+07 95 . 7 .0 66.S 66.S 2.104E+OS Trn A 7.S00E+06 4.140E+06 . 69 9.0 2.906E+07 96.2 .0 66.S 66.S 1.970E+OS Trn A 7.S00E+06 4.140E+06 .69 10.0 2.S92E+07 96.6 .0 66.S 66.S 1. S70E+OS Trn A 7.S00E+06 4.140E+06 .69 11.0 2.S77E+07 96.S .0 66.S 66.S 1.795E+OS Trn A 7.S00E+06 4.140E+06 .69 12.0 2.S63E+07 96.9 .0 66.S 66.S 1.737E+OS Trn A 7.S00E+06 4.140E+06 .69 13.0 2.S49E+07 96.9 .0 66.S 66.S 1.690E+OS Trn A 7.S00E+06 4.140E+06 .69 14.0 2.S36E+07 96.9 .0 66.S 66.S 1.652E+OS Trn A 7.S00E+06 4.140E+06 .69 15.0 2.S23E+07 96.S .0 66.S 66.S 1. 620E+OS Trn A 7.S00E+06 4.140E+06 .69 16.0 2 . S09E+07 96.7 .0 66.S 66.S 1.593E+OS Trn A 7.S00E+06 4.140E+06 .69 17 . 0 2 . 797E+07 96.5 .0 66.S 66.S 1.570E+OS Trn A 7.S00E+06 4.l40E+06 . 69 1S . 0 2.7S4E+07 96 .4 .0 66.S 66.S 1.550E+OS Trn A 7 . S00E+06 4.140E+06 .69 19.0 2.771E+07 96.3 .0 66 . S 66.S 1.532E+OS Trn A 7.S00E+06 4.140E+06 .69 20 . 0 2.759E+07 96.1 .0 66.S 66.S 1 . 516E+OS Trn A 7 . S00E+06 4.140E+06 . 69

21. 0 2.746E+07 96.0 .0 66.S 66.S 1 . 502E+OS Trn A 7.S00E+06 4.140E+06 .69 22.0 2.734E+07 95.S .0 66.S 66.S 1.4S9E+OS Trn A 7.S00E+06 4.140E+06 .69 23.0 2.722E+07 95.7 .0 66.S 66 . S 1. 479E+OS Trn A 7.S00E+06 4 . 140E+06 .69 24.0 2.710E+07 95.6 .0 66.S 66.S 1. 46SE+OS Trn A 7.S00E+06 4 . 140E+06 .69 25.0 2.69SE+07 95.4 .0 66.S 66 . S 1. 45SE+OS Trn A 7.S00E+06 4 . 140E+06 .69 26.0 2 . 6S6E+07 95.4 .0 66.S 66.S 1.44SE+OS Trn A 7.S00E+06 4.140E+06 .69 27 . 0 2 . 675E+07 95.4 .0 66.S 66.S 1. 43SE+OS Trn A 7.S00E+06 4.140E+06 .69 2S . 0 2 . 664E+07 95.4 .0 66.S 66.S 1.430E+OS Trn A 7.S00E+06 4.140E+06 .69 29 . 0 2.653E+07 95 . 4 .0 66 . S 66.S 1.422E+OS Trn A 7.S00E+06 4.140E+06 . 69 30.0 2.641E+07 95 . 4 .0 66.S 66.S 1.415E+OS Trn A 7.S00E+06 4.140E+06 .69

31. 0 2.630E+07 95.3 .0 66.S 66.S 1.405E+OS Trn A 7.S00E+06 4.140E+06 .69 32 . 0 2.619E+07 95.3 .0 66.S 66 . S 1 . 394E+OS Trn A 7 . S00E+06 4.14 OE+06 .69 33.0 2.60SE+07 95.3 .0 66.S 66.S 1. 390E+OS Trn A 7.S00E+06 4.140E+06 .69 34.0 2.597E+07 95.2 .0 66.S 66 . S 1.3SSE+OS Trn A 7.S00E+06 4.140E+06 .69 NMP-ES-039- F02 E2 - 33 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 6of27 Vogtle UHS 2-Fan in-Service Case with 90 F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr] [Ibm] [F] [ppt1 [F1 [F] [btu/hr] [lbm/hrJ [ lbm/hr] [ -]

35.0 2 . 586E+07 95.1 .0 66.8 66.8 1.382E+08 Trn A 7.800E+06 4 . 140E+06 .69 36.0 2.576E +07 95.1 .0 66 . 8 66.8 1. 374E+08 Trn A 7.800E+06 4 . 140E+06 . 69 37.0 2.565E +07 95.0 .0 66.8 66 .8 1. 367E+08 Trn A 7.800E+06 4.140E+06 . 69 38.0 2.554E+07 95.0 .0 66.8 66.8 1 .359E+08 Trn A 7 . 800E+06 4.140E+06 .69 39.0 2.543E+07 94.9 .0 66.8 66.8 1 . 351E+08 Trn A 7.800E+06 4.140E+06 .69 40.0 2.533E+07 94.8 .0 66.8 66.8 1.344E+08 Trn A 7.800E+06 4.14 OE+06 .69 41.0 2.522E+07 94.8 .0 66.8 66.8 1.336E+08 Trn A 7.800E+06 4.140E+06 .69 42 . 0 2.5 11E+07 94.7 .0 66.8 66.8 1. 329E+08 Trn A 7.800E+06 4.140E+06 .69 43.0 2.501E+07 94.6 .0 66.8 66.8 1.321E+08 Trn A 7.800E+06 4.140E+06 .69 44.0 2.491E+07 94.5 .0 66 . 8 66 . 8 1.313E+ 08 Trn A 7 . 800E+06 4.140E+06 .69 45.0 2.480E+07 94.5 .0 66.8 66.8 1.306E+08 Trn A 7 . 800E+06 4.140E+06 .69 46.0 2.470E+07 94.4 .0 66.8 66.8 1. 298E+08 Trn A 7.800E+06 4 . 140E+06 .69 47.0 2.460E+07 94.3 .0 66.8 66.8 1. 290E+08 Trn A 7.800E+06 4.140E+06 .69 48.0 2 . 450E+07 94.2 .0 66.8 66.8 1.283E+08 Trn A 7.800E+06 4.140E+06 .69 49.0 2.440E+07 94 . 1 .0 66 .8 66.8 1.275E+08 Trn A 7.8 00 E+06 4.140E+06 .69 50 . 0 2.4308+07 94.0 .0 66.8 66.8 1.268E+08 Trn A 7 .800E+06 4.140E+06 .69

51. 0 2.420E+07 93.9 .0 66.8 66.8 1. 260E+08 Trn A 7 . 800E+06 4.140E+06 .69 52.0 2.41 0E+07 93.9 .0 66.8 66.8 1.252E+08 Trn A 7.800E+06 4.140E+06 .69 53.0 2.400E+07 93.8 .0 66.8 66.8 1. 245 E+08 Trn A 7.800E+06 4.140E+06 .69 54.0 2.390E+07 93.7 .0 66.8 66.8 1. 237E+08 Trn A 7.800E+06 4.140E+06 .69 55.0 2.380E+07 93.6 .0 66 . 8 66.8 1.229E+08 Trn A 7.800E+06 4.140E+06 . 69 56.0 2.371E+07 93.5 .0 66.8 66.8 1 .222 E+08 Trn A 7.800E+06 4.140E+06 .69 57.0 2.361E+07 93 . 3 .0 66.8 66.8 1.214E+08 Trn A 7 . 8008+06 4.140E+06 .69 58.0 2.351E+07 93.0 .0 66.8 66. 8 1 .207E+08 Trn A 7 .800E+0 6 4.140E+06 .69 59.0 2.341E+07 92.9 .0 66.8 66.8 1 .199 E+08 Trn A 7.800E+06 4.140E+06 .69 60.0 2.331E+07 92.7 .0 66.8 66.8 1.191E+08 Trn A 7.800E+06 4 . 14 OE+06 .69

61. 0 2.322E+07 92.5 .0 66.8 66.8 1.184E+08 Trn A 7.800E+ 06 4.140E+06 .69 62 . 0 2.312E+07 92.3 .0 66.8 66.8 1.176E+08 Trn A 7.800E+06 4.140E+06 .69 63.0 2.303E+07 92.2 .0 66.8 66.8 1 . 169E+ 08 Trn A 7 .800E+06 4.140E+06 .69 64.0 2.294E+07 92.0 .0 66.8 66.8 1.1618+ 08 Trn A 7 .800E+06 4.140E+06 .69 65.0 2.284E+07 91. 9 .0 66.8 66.8 1 . 153E+08 Trn A 7.800E+06 4.140E+06 .69 66.0 2.275E+07 91. 8 .0 66.8 66 . 8 1.146E+08 Trn A 7.800E+06 4 . 140E+ 06 .69 67.0 2 . 266E+07 91.7 .0 66.8 66.8 1.138E+08 Trn A 7.800E+06 4.140E+06 .69 68.0 2.257E+07 91 . 5 .0 66 .8 66.8 1 .130 E+08 Trn A 7.800E+06 4.140E+06 . 69 69 . 0 2.248E+07 91.4 .0 66 .8 66.8 1.1 23 E+08 Trn A 7.800E+06 4.140E+06 .69 NMP-ES-039- F02 E2 - 34 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 7of27 Vogtle UHS 2-Fan in-Service Case with 90 F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr] [Ibm] [F] [ppt] [F] [F] [btu/hr] [lbm/hr] [lbm/hr] [ -]

70.0 2.239E+07 9l. 3 .0 66.S 66.S 1.11SE+OS Trn A 7.S00E+06 4.140E+06 .69 7l. 0 2.231E+07 9l. 2 .0 66.S 66.S 1.10SE+OS Trn A 7.S00E+06 4.140E+06 .69 72 .0 2.222E+07 9l.1 .0 66.S 66.S 1.100E+OS Trn A 7.S00E+06 4.140E+06 .69 Stop - Program terminated.

NMP-ES-039- F02 E2 - 35 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 8or27

3. UHSSIM input/output for Fan2N 85F, 2-Fan Case with lBT of 85 of Vogtle UHS 2-Fan in-Service Case with 85 F initial basin temperature U --------------------------------- - ------- - -----------------------------------

U Mixed CIT model of 2 operable (full speed) and 2 failure fans w/ natural draft U initial basin temp. = 85 F, Max basin temp. < 97 F U PDAP CiT characteristics KaV/L = 0.69 per tower performance data X4C1202V70 V2

" CIT bounding heat load for 1-train LOSP per Appendix AA of X4C1205V04 V2 (MUR)

U HL beyond Hr-36 are extrapolated to Hr-72. 68 hr UHSSlM run time (Hr Hr-72)

design wet-bulb temperature [F), design dry-bulb temperature [F),

U design hot-water temperature [F), design pressure [psia), design solids [ppt)

U 0 => F, psia, btu/hr, Ibm/ hr units 82, 95, 129.0, 14.696, 0 . 0, 0 U initial basin mass [Ibm), initial basin temperature [F), initial solids [ppt) ,

U number of towers, starting time of simulation [hr) 29843200, 85, 0, 1, 4 .

U Time Period Data -- every 1 hr between the 4th hr and the 72nd hr after LOSP U step size, number of steps 1,68 U Tower Operating Data U 5 character tower lD U time [hrJ, water flow rate [lbm/ hr), air flow rate [lbm/hr), KaV/L U Train A Trn A 4.0,7 . 80e6,4.14e6,O.69 72.0,7 . 80e6,4.14e6,0 . 69 U Heat Rejection Data U time, time units (s second, h hour, d day), plant heat

" rejection [btu/hrl 4h, 2.5782E+08 5h, 2.4283E+08 6h, 2.3455E+08 7h, 2.2896E+08 8h, 2.1036E+08 9h, 1 . 9697E+08 10h, 1.8700E+08 11h, 1 . 7951E+08 12h, 1. 7374E+08 13h, 1.6903E+08 14h, 1.6522E+08 15h, 1.6203E+08 16h, 1.5931E+08 17h, 1.5696E+08 18h, 1.5499E+08 19h, 1.5323E+08 20h, 1.5164E+08 21h, 1.5020E+08 22h, 1.4890E+08 23h, 1.4785E+08 24h, 1 . 4675E+08 25h , 1.4579E+08 26h, 1.4482E+08 27h, 1.4384E+08 28h, 1.4301E+08 29h , 1.4216E+08 30h, 1.4149E+08 31h, 1.4052E+08 32h, 1.3940E+08 33h, 1.3901E+08 34h, 1.3 875E+08 35h, 1.3819E+08 36h, 1. 3742E+08 72h, 1.lE+08

Ambient Data Supplied by Bechtel Power Corp.

TIME WB DB P

(hr) (F) (F) (psia) 4, 69.7, 69 . 7, 14 . 7 72, 69 . 7. 69.7, 14.7 NMP-ES-039- F02 E2 - 36 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 90f27 Fan2N 8SF.out Vogtl e UHS 2 - Fan in-Service Case with 85 F initial basin temperature Initial Basin Mas s 2.984E+ 0 7 Ibm Initial Basin Temperature 85.0 F Ini tia l Basin Solids .0 ppt time basin basin basin dry-bulb wet-bulb heat load tower wat er air KaV/L mass temp solids temp temp flow rate flow rate

[hr] [Ibm] [F] [ppt] [F] [F] [btu/hr] [lbm/hr ] [lbm/hr] [ -]

4.0 2. 984E+0 7 85.0 .0 69.7 69.7 2.578E +08 Trn A 7.800E+06 4.140E+06 .69 5.0 2 . 971E+07 87.9 .0 69.7 69.7 2.428E+08 Trn A 7.800E+06 4.140E+06 .69 6.0 2.957E+07 90.2 .0 69.7 69.7 2.346E+08 Trn A 7.800E+06 4.140E+06 .69 7.0 2.943E+07 92. 1 .0 69.7 69.7 2.290E+08 Trn A 7.800E+06 4.140E+06 .69 8 .0 2.929E+07 93. 5 .0 69.7 69.7 2 . 104E+08 Trn A 7.800E+06 4.14 0E+06 .69 9.0 2.915E+07 94.6 .0 69 . 7 69 .7 1.970E+08 Trn A 7.800E+06 4.140E+ 06 .69 10.0 2.901E+07 95.4 .0 69 . 7 69.7 1.870E+08 Trn A 7 .800E+06 4.140E+06 .69 11.0 2.887E+07 95.9 .0 69.7 69.7 1.795E+08 Trn A 7.800E+06 4.140E+06 .69 12.0 2.874E+07 96 .3 .0 69.7 69.7 1.737E+08 Trn A 7 . 800E+06 4.140E+06 .69 13.0 2.861E+07 96.6 .0 69.7 69.7 1.690£+08 Trn A 7.800E+06 4.140E+06 .69 14.0 2.848E+07 96.8 .0 69.7 69.7 1.652E+08 Trn A 7.800E+06 4.140E+06 .69 15.0 2.835E+07 96.9 .0 69.7 69.7 1. 620E+08 Trn A 7 . 800E+06 4.140E+06 .69 16 .0 2.822E+07 96.9 .0 69.7 69.7 1 . 593E+08 Trn A 7.800E+06 4.140E+06 .69 17 . 0 2.80 9E+07 96 . 9 .0 69.7 69.7 1.570E+08 Trn A 7.800E+06 4.140E+06 .69 18.0 2.796E+07 96.9 .0 69 . 7 69.7 1.550E+08 Trn A 7.8 00E+06 4.140E+06 .69

19. 0 2.784E+07 96.9 .0 69.7 69.7 1.532E+08 Trn A 7.80 0E+06 4.140E+06 .69 20.0 2.771E+07 96.8 .0 69.7 69.7 1.516E+08 Trn A 7.800E+06 4.140E+06 .69 21.0 2.759E+07 96.7 .0 69.7 69. 7 1.502E+08 Trn A 7.800E+06 4.140E+06 .69 22.0 2.747E+07 96.7 .0 69.7 69.7 1.489E+08 Trn A 7.800E+06 4.140E+06 .69 23.0 2.735E+07 96.6 .0 69.7 69.7 1. 479E+08 Trn A 7 .800E+06 4.14 OE+06 . 69 24.0 2.723E+07 96 . 5 .0 69.7 69.7 1. 468E+08 Trn A 7.800E+06 4.1 40E+06 . 69 25.0 2 . 711E+07 96.4 .0 69.7 69.7 1.458E+08 Trn A 7.800E+06 4.140E+06 .69

26. 0 2.699E+07 96.3 .0 69.7 69.7 1.448E+08 Trn A 7.800E+06 4.140E+06 .69 27.0 2.687E+07 96.2 .0 69.7 69.7 1.438E+08 Trn A 7.800E+06 4 . 140E+ 06 .69 28.0 2.675E+07 96.1 .0 69.7 69.7 1.430E+08 Trn A 7.800E+06 4.140E+06 .69 29.0 2.664E+07 96 .0 .0 69.7 69.7 1.422E+08 Trn A 7.800E+06 4.140E+06 .69 30.0 2.652E+ 07 95.9 .0 69.7 69.7 1.415E+ 08 Trn A 7.800E+06 4.14 0E+06 .69 31.0 2.641E+07 95.8 .0 69.7 69 . 7 1.405E+08 Trn A 7.800E+06 4 .140 E+06 .69 32.0 2.629 E+07 95.8 .0 69.7 69.7 1.394E+08 Trn A 7.800E+06 4.140E+06 . 69 33.0 2.618E+07 95.7 .0 69.7 69.7 1.39 0E+08 Trn A 7 .800 E+06 4.140E+06 .69 34.0 2.607E+07 95 . 6 .0 69.7 69.7 1.388E+08 Trn A 7 . 800E+06 4.140E+06 .69 NMP-ES-039- F02 E2 - 37 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 IOor27 Vogtle UHS 2-Fan in-Service Case with 85 F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr] [Ibm] [F] [ppt] [F] [F] [btu/hr] [lbm/hr ] [lbm/hr] [ -]

35.0 2.596E+07 95.6 .0 69.7 69.7 1 .382E+08 Trn A 7 . 800E+06 4.140E+06 .69 36.0 2.585E+07 95.7 .0 69.7 69.7 1. 374E+08 Trn A 7.800E+06 4.140E+06 .69 37.0 2.574E+07 95.7 .0 69.7 69.7 1.367E+08 Trn A 7.800E+06 4 .140E+06 .69 38.0 2.564E+07 95.7 .0 69.7 69.7 1. 359E+08 Trn A 7.800E+06 4.140E+06 .69 39.0 2.553E+07 95.7 .0 69.7 69.7 1. 351E+ 08 Trn A 7.800E+06 4.140E+06 .69

40. 0 2.542E+07 95.7 .0 69.7 69.7 1 .3 44E+08 Trn A 7.800E+06 4.140E+06 .69

41. 0 2.532E+07 95.7 .0 69 . 7 69.7 1 .336E +08 Trn A 7.800E+06 4.140E+06 .69 42.0 2.521 8+07 95.7 .0 69.7 69.7 1.329E+08 Trn A 7.800E+06 4.140E+06 .69 43.0 2.511E+07 95.7 .0 69.7 69.7 1.321E+08 Trn A 7.800E+06 4.140E+06 .69 44.0 2.500E+07 95.6 .0 69.7 69.7 1. 313E+08 Trn A 7 . 800E+06 4.140E+06 .69 45.0 2.490E+07 95.6 .0 69.7 69.7 1 .306 E+08 Trn A 7 .800E +06 4.140E+06 .69 46.0 2.4798+07 95.5 .0 69.7 69 . 7 1.2988+08 Trn A 7.800E+06 4.140E+06 .69 47.0 2.469 E+07 95.5 .0 69.7 69.7 1.2908+08 Trn A 7.8008+06 4.140E+06 .69 48.0 2 . 459E+07 95.4 .0 69.7 69.7 1.283E+08 Trn A 7.800E+06 4.140E+06 .69 49.0 2.449E+07 95.3 .0 69.7 69.7 1.275E+08 Trn A 7.80 08+06 4.140E+06 .69 50.0 2.438E+07 95.3 .0 69 . 7 69.7 1.268E+08 Trn A 7.800E+06 4.140E+06 .69

51. 0 2.428E+07 95 . 2 .0 69.7 69.7 1.260E+08 Trn A 7.800E+06 4.140E+06 .69 52.0 2.418E+07 95.1 .0 69.7 69.7 1 . 252E+08 Trn A 7 . 800E+06 4.140E+06 .69 53.0 2.408E+07 95.0 .0 69.7 69.7 1.245E+08 Trn A 7.800E+06 4.140E+06 .69 54.0 2.398E+07 95.0 .0 69.7 69.7 1. 237E+08 Trn A 7.800E+06 4.140E+06 .69 55.0 2.389E+07 94.9 .0 69.7 69.7 1. 229 E+08 Trn A 7.800E+06 4 . 140E+06 .69 56.0 2.379E+07 94.8 .0 69.7 69.7 1.222E+08 Trn A 7.800E+06 4.140E+06 .69 57.0 2.369E+07 94.7 .0 69 .7 69.7 1.214E+08 Trn A 7.800E+06 4.140E+06 .69 58.0 2.359E+07 94.6 .0 69.7 69.7 1.207E+08 Trn A 7.800E+06 4.140E+06 .69 59.0 2.350E+07 94 . 5 .0 69.7 69.7 1.199E+08 Trn A 7.800E+06 4.140E+06 .69 60.0 2.340E+07 94 . 4 .0 69.7 69.7 1.191E+08 Trn A 7.800E+ 06 4.140E+06 .69

61. 0 2.33 1E+07 94.4 .0 69.7 69.7 1.184E+08 Trn A 7.800E+06 4.140E+06 .69 62.0 2.322E+07 94.3 .0 69.7 69.7 1 .176 E+08 Trn A 7.800E+06 4.140E+06 .69 63.0 2.312E+07 94.2 .0 69.7 69 .7 1.169E+08 Trn A 7.800E+06 4 . 140E+06 .69 64.0 2.303E+07 94.1 .0 69.7 69.7 1.161E+08 Trn A 7.800E+06 4.140E+06 .69 65.0 2.294E+07 94.0 .0 69 .7 69.7 1.153E+08 Trn A 7.800E+06 4.140E+06 .69 66 . 0 2.285E+07 93.9 .0 69.7 69.7 1.1468 +08 Trn A 7 .800E+06 4.140E+06 .69 67 . 0 2.276E+07 93.8 .0 69.7 69.7 1.138E+08 Trn A 7.800E+06 4.1408+06 .69 68.0 2.267E+07 93.7 .0 69.7 69.7 1.130E+08 Trn A 7.800E+06 4.140E+06 .69 69.0 2.257E+07 93.5 .0 69.7 69.7 1 . 123E+08 Trn A 7 .800E+06 4.1408+06 .69 NMP-ES-039- F02 E2 - 38 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 11 of 27 Vogtle UHS 2-Fan in-Service Case with 85 F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp sol ids temp temp flow rate flow rate

[hr] [Ibm] [F] [ppt] [F ] [F] [btu/hr] [lbm/hr] [lbm/hr] [ -]

70 . 0 2.248E+07 93 . 3 .0 69.7 69.7 1.115E+08 Trn A 7.800E+06 4.140E+06 . 69 71 . 0 2.239E+07 93 . 1 .0 69 . 7 69 . 7 1.108E+08 Trn A 7.800E+06 4 . 140E+06 . 69 72.0 2 . 230E+07 92.9 .0 69 . 7 69 . 7 1 . 100E+08 Trn A 7.800E+06 4 . 140E+06 . 69 Stop - Program terminated .

NMP-ES-039- F02 E2 - 39 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 12 of27

4. UHSSIM input/output for Fan2N BOF, 2-Fan Case with IBT of 80 OF Fan2N_ BOF. inp Vogtle UHS 2-Fan in-Service Case with 80 F ini~ial basin temperature U -------------------.---------------------------------------------------------

U Mixed CiT model of 2 operable (full speed) and 2 failure fans w/ natural draft U initial basin temp. = 80 F, Max basin temp. < 97 F U PDAP Ci T characteristics KaV/L = 0.69 per tower performance data X4C1202V70 V2 U CiT bounding heat load for i-train LOSP per Appendix AA of X4C1205V04 V2 (MUR)

U HL beyond Hr-36 are extrapolated to Hr-72. 68 hr UHSSIM run time (Hr Hr-72)

U -----------------------------------------------------------------.-- - .---.---

U design wet-bulb temperature [F], design dry-bulb temperature [F],

U design hot-water temperature [F], design pressure [psia], design solids [ppt]

U 0 => F, pSia , btu/hr, lbm /hr units 82, 95, 129 . 0, 14. 696, 0.0, 0 U initial basin mass [lbm] , initial basin temperature [F], initial solids [ppt] ,

U number of towers, starting time of simulation [hr]

29843200, 80, 0, 1, 4 .

U Time Period Data -- every 1 hr between the 4th hr and the 72nd hr after LOSP U step size, number of steps

1. 68 U Towe r Operating Data U 5 character tower ID U time [hrl, water flow rate [lbm/hr], air flow rate [lbm/hrl, KaV/L U Train A Trn A 4.0,7.80e6,4.14e6,0.69 72.0,7.80e6,4.14e6,0.69 U Heat Rejection Data

" time, time units (s second, h hour, d day), plant heat

" rejection [btu /hr ]

4h, 2.5782E+08 5h, 2. 4283E+08 6h, 2.3455E+08 7h, 2. 2896 E+08 8h, 2.1036 E+08 9h, 1.9697E+08 10h, 1.8700E+08 llh, 1.7951E+08 12h, 1.7374E+08 13h, 1.6903E+08 14h, 1.6522E+08 iSh, 1.6203E+08 16h, 1.5931E+08 17h, 1 .5696E+08 18h , 1. 5499E+08 19h , 1. 5323E+08 20h, 1 . 5164E+08 2 1h , 1.5020E+08 22h, 1.4890E+08 23h, 1.4785E+08 24h, 1.4675E+08 25h, 1.4579E+08 26h, 1.4482E+08 27h, 1.4384E+08 28h, 1.4301E+08 29h, 1.4216E+08 30h, 1.4149E+08 31h, 1.4052E+08 32h, 1 . 3940E+08 33h, 1 . 3901E+08 34h, 1 .38 75E+08 35h, 1 .3 819E+08 36h, 1.3742E+08 72h, 1.lE+08 Ambient Data Supplied by Bechtel Power Corp.

"" TIME (hr)

WB (F)

DB (F)

P (psia)

" 4, 72, 71.0, 71.0, 71.0, 71.0, 14.7 14.7 NMP-ES-039- F02 E2 -40 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 13 of27 Fan2N BOF.out Vogtle UHS 2-Fan in-Service Case with 80 F initial basin temperature Initial Basin Mass 2 . 9848+07 ibm Initial Basin Temperature 80 . 0 F Initial Basin Solids . 0 ppt time basin basin basin dry - bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr) [Ibm) [F) [ppt) [F) [F) [btu/hr) [lbm/hr) [lbm/hrJ [- )

4.0 2.984E+07 80.0 .0 71. 0 71. 0 2.5788+08 Trn A 7.800E+06 4.1408+06 .69 5.0 2.973E+07 83.6 .0 71. 0 71.0 2.428E+08 Trn A 7.800E+06 4.140E+06 . 69 6.0 2.961E+07 86.6 .0 71. 0 71. 0 2.346E+08 Trn A 7.800E+06 4.140E+06 . 69 7.0 2.948E+07 89.1 .0 71. 0 71.0 2.290E+08 Trn A 7.800E+06 4.140E+06 .69 8.0 2.935E+07 91.1 .0 71. 0 71.0 2.104E+08 Trn A 7.800E+06 4.140E+06 .69 9.0 2.922E+07 92.6 .0 71. 0 71. 0 1.9708+08 Trn A 7.800E+06 4.140E+06 .69 10.0 2.909E+07 93.7 .0 71. 0 71. 0 1.8708+08 Trn A 7.8008+06 4.140E+06 .69 11.0 2.897E+07 94.6 .0 71. 0 71. 0 1.7958+08 Trn A 7.800E+06 4.1408+06 .69 12.0 2.884E+07 95.3 .0 71. 0 71. 0 1. 73 7E+08 Trn A 7.800E+06 4.140E+06 .69 13.0 2.871E+07 95 . 8 .0 71. 0 71. 0 1. 690E+08 Trn A 7.800E+06 4.1408+06 .69 14.0 2.859E+07 96 .2 .0 71. 0 71. 0 1.652E+08 Trn A 7.8008+06 4.140E+06 .69 15 . 0 2.846E+07 96.4 .0 71. 0 71. 0 1.620E+08 Trn A 7.800E+06 4.140E+06 .69 16.0 2.833E+07 96 . 6 .0 71. 0 71.0 1 . 593E+08 Trn A 7.800E+06 4.140E+06 .69 17.0 2.821E+07 96.8 .0 71. 0 71.0 1 . 570E+ 08 Trn A 7.80 0E+06 4.140E+06 .69 18.0 2.8088+07 96 . 9 .0 71.0 71 . 0 1 . 5508+08 Trn A 7 . 800E+06 4.140E+06 .69 19 . 0 2 . 7968+07 96.9 .0 71.0 71.0 1 . 5328+08 Trn A 7 . 800E+06 4.1408+06 .69 20 . 0 2 . 7848+07 96.9 .0 71. 0 71. 0 1 . 5168+08 Trn A 7 . 800E+06 4.1408+06 .69

21. 0 2 . 772E+07 96.9 .0 71. 0 71.0 1.502E+08 Trn A 7 . 800E+06 4.1408+06 . 69 22.0 2 . 7608+07 96.9 .0 71.0 71. 0 1. 4898+08 Trn A 7 . 800E+06 4.1408+06 .69 23.0 2.747E+07 96.9 .0 71.0 71. 0 1.479E+08 Trn A 7 . 800E+06 4.1408+06 .69 24.0 2.7358+07 96.8 .0 71.0 71 . 0 1. 468E+08 Trn A 7.800E+06 4.1408+06 .69 25.0 2.724E+07 96.8 .0 71 . 0 71. 0 1.4588+08 Trn A 7.800E+06 4.140E+06 .69 26.0 2.712E+07 96.7 .0 71. 0 71. 0 1.448E+08 Trn A 7.800E+06 4.140E+06 . 69 27.0 2.700E+07 96.6 .0 71. 0 71. 0 1.438E+08 Trn A 7 . 8008+06 4.140E+06 .69 28.0 2.688E+07 96 . 6 .0 71.0 71. 0 1. 430E+08 Trn A 7.8008+06 4.1408+06 .69 29.0 2.677E+07 96.5 .0 71. 0 71. 0 1.422E+08 Trn A 7.8008+06 4.14 OE+06 .69 30.0 2.665E+07 96.4 .0 71.0 71.0 1. 415E+08 Trn A 7.800E+06 4.140E+06 .69

31. 0 2.654E+07 96.3 .0 71. 0 71.0 1.405E+08 Trn A 7.800E+06 4.140E+06 .69 32.0 2.642E+07 96.3 .0 71. 0 71.0 1.394E+08 Trn A 7.800E+06 4.1408+06 .69 33.0 2.6318+07 96.2 .0 71. 0 71. 0 1. 3908+08 Trn A 7 . 800E+06 4.140E+06 .69 34.0 2.619E+07 96.1 .0 71. 0 71. 0 1.388E+08 Trn A 7.800E+06 4.140E+06 .69 NMP-ES-039- F02 E2 - 41 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 14of27 Vogtle UHS 2-Fan in-Service Case with SO F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr] [lbm] [F] [ppt] [F] [Fl [btu/hrl [lbm/hrl [lbm/hrl [ -]

35.0 2.60SE+07 96.1 .0 71. 0 71. 0 1.3S2E+OS Trn A 7.S00E+06 4.140E+06 .69 36.0 2.597E+07 96.0 .0 71. 0 71. 0 1.374E+OS Trn A 7.S00E+06 4.140E+06 .69 37.0 2.5S6E+07 95.9 .0 71. 0 71. 0 1.367E+OS Trn A 7.S00E+06 4.140E+06 .69 3S.0 2.575E+07 95.S .0 71. 0 71. 0 1. 359E+OS Trn A 7.S00E+06 4.140E+06 .69 39.0 2.564E+07 95.S .0 71. 0 71. 0 1. 351E+OS Trn A 7.S00E+06 4.140E+06 .69 40.0 2.553E+07 95.S .0 71. 0 71. 0 1.344E+OS Trn A 7.S00E+06 4.140E+06 .69

41. 0 2.543E+07 95.S .0 71. 0 71. 0 1.336E+OS Trn A 7.S00E+06 4.140E+06 .69 42.0 2.532E+07 95.9 .0 71. 0 71. 0 1.329E+OS Trn A 7.S00E+06 4.140E+06 .69 43.0 2.522E+07 95.9 .0 71. 0 71. 0 1.321E+OS Trn A 7.S00E+06 4.140E+06 .69 44.0 2.511E+07 95.9 .0 71. 0 71. 0 1.313E+OS Trn A 7.S00E+06 4.140E+06 .69 45.0 2.501E+07 95.9 .0 71. 0 71. 0 1.306E+OS Trn A 7.S00E+06 4.140E+06 .69 46.0 2.490E+07 95.9 .0 71. 0 71. 0 1. 29SE+OS Trn A 7.S00E+06 4.140E+06 .69 47.0 2.4S0E+07 95.9 .0 71. 0 71. 0 1.290E+OS Trn A 7.S00E+06 4.140E+06 .69 4S.0 2.470E+07 95.S .0 71. 0 71. 0 1. 2S3E+OS Trn A 7.S00E+06 4.140E+06 .69 49.0 2.460E+07 95.S .0 71. 0 71. 0 1.275E+OS Trn A 7.S00E+06 4.140E+06 .69 50.0 2.450E+07 95.7 .0 71. 0 71. 0 1.26SE+OS Trn A 7.S00E+06 4.140E+06 .69

51. 0 2.439E+07 95.7 .0 71. 0 71. 0 1.260E+OS Trn A 7.S00E+06 4.140E+06 .69 52.0 2.429E+07 95.6 .0 71. 0 71. 0 1.252E+OS Trn A 7.S00E+06 4.140E+06 .69 53.0 2.419E+07 95.6 .0 71. 0 71. 0 1.245E+OS Trn A 7.S00E+06 4.140E+06 .69 54.0 2.409E+07 95.5 .0 71. 0 71. 0 1. 237E+OS Trn A 7.S00E+06 4.140E+06 .69 55.0 2.400E+07 95.4 .0 71. 0 71. 0 1. 229E+OS Trn A 7.S00E+06 4.140E+06 .69 56.0 2.390E+07 95.4 .0 71.0 71. 0 1.222E+OS Trn A 7.S00E+06 4.140E+06 .69 57.0 2.3S0E+07 95.3 .0 71. 0 71.0 1.214E+OS Trn A 7.S00E+06 4.140E+06 .69 5S.0 2.370E+07 95.2 .0 71.0 71. 0 1.207E+OS Trn A 7.S00E+06 4.140E+06 .69 59.0 2.361E+07 95.1 .0 71.0 71. 0 1.199E+OS Trn A 7.S00E+06 4.140E+06 .69 60.0 2.351E+07 95.0 .0 71.0 71.0 1.191E+OS Trn A 7.S00E+06 4.140E+06 .69 61.0 2.342E+07 95.0 .0 71.0 71.0 1.lS4E+OS Trn A 7.S00E+06 4.140E+06 .69 62.0 2.332E+07 94.9 .0 71.0 71. 0 1.176E+OS Trn A 7.S00E+06 4.140E+06 .69 63.0 2.323E+07 94.S .0 71. 0 71. 0 1.169E+OS Trn A 7.S00E+06 4.140E+06 .69 64.0 2.314E+07 94.7 .0 71. 0 71. 0 1.161E+OS Trn A 7.S00E+06 4.140E+06 .69 65.0 2.304E+07 94.6 .0 71. 0 71. 0 1.153E+OS Trn A 7.S00E+06 4.140E+06 .69 66.0 2.295E+07 94.5 .0 71. 0 71. 0 1.146E+OS Trn A 7.S00E+06 4.140E+06 .69 67.0 2.2S6E+07 94.4 .0 71. 0 71.0 1.13SE+OS Trn A 7.S00E+06 4.140E+06 .69 6S.0 2.277E+07 94.3 .0 71.0 71. 0 1.130E+OS Trn A 7.S00E+06 4.140E+06 .69 69.0 2.26SE+07 94.2 .0 71. 0 71. 0 1.123E+OS Trn A 7.S00E+06 4.140E+06 .69 NMP-ES-039- F02 E2 - 42 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4CI202V70 150f27 Vogtle UHS 2-Fan in-Service Case with 80 F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr} [lbm} [F} [ppt} [F} [F} [btu/hr} [lbm/hr} [lbm/hr] [-]

70.0 2.259E+0 7 94.2 .0 7l.0 7l. 0 l.1l5E+08 Trn A 7.800E+06 4 . 140E+06 . 69 71.0 2.250E+0 7 94.1 .0 7l. 0 7l. 0 1.108E+08 Trn A 7.800E+06 4.140E+06 . 69 72.0 2.241E+07 94.0 .0 7l.0 7l. 0 1 . 100E+08 Trn A 7.800E+06 4 . 140E+06 . 69 Stop - Program terminated.

t\lMP-ES-039- F02 E2 - 43 NMP-ES-039-00 1 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 16of27

5. UHSSIM input/output for Fan2N 75F, 2-Fan Case with IBT of 75 of Fan2N_75F. inp vogtle UHS 2-Fan in-Service Case with 75 F initial basin temperature II -----------------------------------------------------------------------------

II Mixed CIT model of 2 operable (full speed) and 2 failure fans w/ natural draft II initial basin temp. = 75 F, Max basin temp. < 97 F II PDAP CIT characteristics KaV/L = 0.69 per tower performance data X4C1202V70 V2 II CIT bounding heat load for 1-train LOSP per Appendix AA of X4C1205V04 V2 (MUR)

II HL beyond Hr-36 are extrapola ted to Hr-72. 68 hr UHSSIM run time (Hr Hr-72)

II ----------- -- ------------------------------------------------------ --- -------

design wet-bulb temperature [F], design dry-bulb temperature [F],

design hot-water temperature [F] , design pressure [psia), design solids [ppt]

0 => F, psia, btu/hr, lbm/hr units 82, 95, 129.0, 14.696, 0.0, 0 II initial basin mass [Ibm], initial basin temperature [F], initial solids [ppt] ,

II number of towers, starting time of simulation [hr]

29843200, 75, 0, 1, 4.

Time Period Data -- every 1 hr between the 4th hr and the 72nd hr after LOSP II step size, number of steps 1,68 Tower Operating Data II 5 character tower ID II time [hr] , water flow rate [lbm/hr], air flow rate [lbm/hr], KaV/L II Train A Trn A 4.0,7.80e6,4 . 14e6,0.69 72.0,7 .8 0e6,4.14e6,0.69 II Heat Rejection Data II time, time units (s second, h hour, d day), plant heat II rejection [btu/hr]

4h, 2. 5782E+08 5h, 2.4283E+08 6h, 2.3455E+08 7h, 2.2896E+08 8h, 2 . 1036E+08 9h, 1.9697E+08 10h, 1.8700E+08 11h , 1.7951E+08 12h, 1.7374E+08 13h, 1.6903E+08 14h, 1.6522E+08 15h, 1.6203E+08 16h, 1.5931E+08 17h, 1 . 5696E+08 18h, 1.5499E+08 19h, 1 .532 3E+08 20h, 1.5164E+08 21h, 1.5020E+08 22h, 1.4890E+08 23h, 1.4785E+08 24h, 1.4675E+08 25h, 1.4579E+08 26h, 1.4482E+08 27h, 1.4384E+08 28h, 1.4301E+08 29h, 1.4216E+08 30h, 1.4149E+08 31h, 1.4052E+08 32h, 1.3940E+08 33h, 1.3901E+08 34h, 1.3875E+08 35h, 1.3 819E+08 36h, 1.3742E+08 72h, 1.1E+08 II Ambient Data Supplied by Bechtel Power Corp.

TIME WB DB P

(hr) (F) (F) (psia) 4, 71. 7, 71 . 7, 14.7 72, 71. 7, 71. 7, 14.7 NMP-ES-039- F02 E2 - 44 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4CI202V70 170f27 Fan2 7SF.out Vogtle UHS 2-Fan in-Service Case with 75 F initial basin temperature Initial Basin Mass 2.984£+07 1bm Initial Basin Temperature 75.0 F Initial Basin Solids .0 ppt time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr] [lbm] [F] [ppt] [F] [F] [btu/hr] [lbm/hr] [lbm/hr] [ -]

4.0 2.984£+07 75.0 .0 71.7 71.7 2 . 578£+08 Trn A 7.800£+06 4.140£+06 .69 5.0 2.975£+07 79.5 .0 71.7 7l.7 2 . 428£+08 Trn A 7.800£+06 4.140£+06 .69 6.0 2.965£+07 83.1 .0 71.7 7l.7 2.346£+08 Trn A 7.800£+06 4.140£+06 .69 7.0 2 . 954£+07 86.1 .0 71.7 7l.7 2.290 £+08 Trn A 7.800£+06 4.140£+06 .69 8.0 2.942£+07 88.6 .0 71.7 7l.7 2.104£+08 Trn A 7.800£+06 4.140£+06 .69 9.0 2.930£+07 90.5 .0 71.7 7l. 7 1.970£+08 Trn A 7.80 0£+06 4.140£+06 .69 10.0 2.918£+07 92 .0 .0 71.7 71.7 1.870£+08 Trn A 7.800£+06 4.140£+06 .69 1l. 0 2.906£+07 93.1 .0 71 . 7 71.7 1.795£+08 Trn A 7.80 0£+06 4.140£+06 .69 12.0 2.894£+07 94.1 .0 71.7 71.7 1.737£+08 Trn A 7.800£+06 4.140£+06 .69 13.0 2.882£+07 94.8 .0 71. 7 7l.7 1.690£+08 Trn A 7.800£+06 4.140£+06 .69 14.0 2.869£+07 95.3 .0 71. 7 7l.7 1.652£+08 Trn A 7 . 800£+06 4.140£+06 .69 15.0 2.857£+07 95 . 8 .0 71 . 7 7l.7 1 .620£+0 8 Trn A 7 . 800£+06 4.140£+06 .69 16.0 2.845£+07 96.1 .0 71.7 71.7 1.593£+08 Trn A 7.800£+06 4.140£+06 .69 17.0 2.833£+07 96.4 .0 71.7 71.7 1.570£+08 Trn A 7.800£+06 4.140£+06 .69 18.0 2.821£+07 96.6 .0 71 . 7 71. 7 1.550£+08 Trn A 7.800£+06 4.140£+06 .69 19.0 2 . 808£+07 96.7 .0 71.7 71.7 1. 532£+08 Trn A 7.800£+06 4.140£+06 .69 20.0 2.796£+07 96.8 .0 71. 7 71.7 1. 516£+08 Trn A 7.800£+06 4.140£+06 .69

21. 0 2.784£+07 96.9 .0 71.7 71.7 1.502£+08 Trn A 7.800£+06 4.140£+06 .69 22.0 2.772£+07 96.9 .0 71. 7 71.7 1.489£+08 Trn A 7.800£+06 4.140£+06 .69 23.0 2.760£+07 96.9 .0 71.7 71.7 1. 479£+08 Trn A 7.800£+ 06 4.140£+06 .69 24.0 2.748£+07 96.9 .0 71.7 71. 7 1 . 468£+08 Trn A 7 . 800£+06 4.140£+06 .69 25.0 2.736£+07 96.9 .0 71.7 71. 7 1.458£+08 Trn A 7.800£+06 4.140£+06 .69 26.0 2.725£+07 96.8 .0 71.7 71.7 1. 44 8£+08 Trn A 7 . 800£+06 4.140£+06 .69 27.0 2.713£+07 96.8 .0 71.7 71.7 1. 43 8£+08 Trn A 7.800£+06 4.140£+06 .69 28.0 2.701£+07 96.8 .0 71.7 71. 7 1.430£+08 Trn A 7 .800£+06 4.140£+06 .69 29.0 2.690£+07 96.7 .0 71.7 71.7 1.422£+ 08 Trn A 7.800£+06 4.140£+06 .69 30.0 2.678£+07 96.7 .0 71. 7 71.7 1. 415£+08 Trn A 7.800£+06 4.140£+06 .69 31.0 2.667£+07 96.6 .0 71. 7 71.7 1.405£+08 Trn A 7.80 0£+06 4.140£+06 . 69 32.0 2.655£+07 96.5 .0 71.7 71.7 1.394£+08 Trn A 7.800£+06 4.140£+06 .69 33 . 0 2.644E+07 96.5 .0 71. 7 71.7 1. 390£+08 Trn A 7.800£+06 4.140£+06 .69 34.0 2.632£+07 96.4 .0 71.7 71.7 1 . 388£+08 Trn A 7 .800£+06 4.140£+06 .69 NMP-ES-039- F02 E2 -45 NMP-ES-039-00 1 to NL-1L-L;:Jti4 Response to Request for Additional Information Southern Nuclear Calculations Vogtle UHS 2-Fan in-Service Case with 75 F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower air KaV/L mass temp solids temp flow rate

[hr] [lbm] [F] [ppt] [F] [btu/hr] [lbm/hr] H 35.0 2.621E+07 96 3 .0 71. 7 71. 7 1.382E+08 Trn A 7.800E+06 4 1408+06 .69 36.0 2.610E+07 96 3 0 71.7 71 7 1. 3748+08 Trn A 7.800E+06 .140E+06 .69 37.0 2.5998+07 96.2 .0 71.7 71.7 1.3678+08 Trn A 7.800E+06 4.1408+06 .69 38.0 2.5888+07 96. .0 71. 7 71. 7 1.3598+08 Trn A 7.800E+06 4.140E+06 .69 39.0 2.577E+07 96.1 .0 71.7 71.7 1 3518+08 Trn A 7.800E+06 4 1408+06 69 40.0 2.566E+07 96.0 .0 71. 7 71.7 1.3448+08 Trn A 7.800E+06 4.140E+06 69 41.0 2.555E+07 95.9 .0 71.7 71.7 1.336E+08 Trn A 7.800E+06 4.1408+06 .69 42.0 2.5448+07 95.9 .0 71.7 71.7 1.329E+08 Trn A 7.800E+06 4.140E+06 .69 43.0 2. 3E+07 95.8 .a 7 71 7 1. 321E+08 Trn A 7.800E+06 4.140E+06 .69 44.0 2.523E+07 95.9 .0 71. 71.7 1.3138+08 Trn A 7.800E+06 4 140£+06 69 45.0 2.513E+07 95.9 .0 71.7 71.7 1. 306E+08 Trn A 7.600E+06 4.140E+06 .69 46.0 2 502E+07 96.0 .0 71.7 71.7 .298E+08 Trn A 7 800E+06 4.140E+06 .69 47.0 2.492E+07 96.0 71.7 71.7 1.290E+08 Trn A 7.800£+06 4 140£+06 .69 48.0 2.482E+07 96.0 .0 717 71.7 1 283E+08 Trn A 7.800E+06 4.140£+06 .69 49.0 2.4 72E+07 96.0 .0 71.7 71.7 1.275E+08 Trn A 7.800E+06 4.140£+06 .69

50. 2.462E+07 95.9 .0 71.7 71.7 1.268£+08 Trn A 7.800E+06 4.140E+06 .69 51.0 2.452£+07 95.9 .0 7 71.7 1.260£+08 Trn A 7.800E+06 4.140£+06 69 52.0 2.441E+07 95.9 .0 71.7 71.7 1. 252E+08 Trn A 7.800E+06 4.140E+06 .69 53.0 2.432E+07 95.8 .0 71.7 71.7 1.2458+08 Trn A 7.800£+06 4.140E+06 .69 54.0 2.422E+07 95 8 .0 71. 7 .7 1.237£+08 Trn A 7.800E+06 4.140E+06 .69 55.0 2.4128+07 95. .0 71.7 71.7 1.229E+08 Trn A 7.800E+06 4.140E+06 .69 56.0 2.402£+07 95.6 .0 71 7 71.7 1. 222E+08 Trn A 7.8008+06 4 140£+06 69 57.0 2.392E+07 95.6 .0 71. 7 71. 7 1.214E+08 Trn A 7.800E+06 4.140E+06 .69 58.0 2.382E+07 95.5 .0 71. 7 71.7 1.207E+08 Trn A 7.800£+06 4.140E+06 .69 59.0 2.373E+07 95.4 .0 71. 7 71.7 1. 199£+08 Trn A 7.8008+06 4.1408+06 .69 60.0 2.363E+07 95.4 .0 71. 7 71.7 1.1918+08 Trn A 7.800E+06 4.140£+06 .69

61. 0 2.354E+07 95.3 .0 71.7 71.7 1.1848+08 Trn A 7.800E+06 4.1408+06 .69 62.0 2.344E+07 95.2 .0 71. 7 71. 7 1.176E+08 Trn A 7.800E+06 4.140E+06 .69 63.0 2.335E+07 95.1 .0 71 7 71 7 1.169E+08 Trn A 7.800E+06 4.140E+06 .69 64.0 2.325E+07 .0 .0 7 71 7 1.161E+08 Trn A 7.800E+06 4 1408+06 .69 65.0 2 316E+07 94.9 .0 71.7 71. 7 1.153E+08 Trn A 7 800E+06 4.140E+06 .69 66.0 2.307E+07 94.9 .0 71. 7 71.7 1. 146£+08 Trn A 7.800E+06 4.140E+06 .69 67.0 2.298£+07 94.8 .0 71 7 71. 7 1.138E+08 Trn A 7.8008+06 4.140E+06 .69

68. 2.2898+07 94. .0 71 7 71 7 1.130E+08 Trn A 7.800E+06 4 140E+06 .69 69.0 2.280E+07 94 6 .0 71.7 71.7 1.1238+08 Trn A 7.8008+06 4.1408+06 .69 E2 -46 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 190f27 Vogtle UHS 2-Fan in-Service Case with 75 F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr] [Ibm] [F] [ppt] [F] [F] [btu/hr] [lbm/hr] [lbm/hr] [ -]

70 . 0 2.271E+07 94.5 .0 71. 7 71.7 1.115E+08 Trn A 7.800E+06 4.140E+06 .69

71. 0 2.262E+07 94.4 .0 71. 7 71. 7 1.108E+08 Trn A 7.800E+06 4 . 140E+06 .69 72.0 2.253E+07 94.3 .0 71. 7 71.7 1.100E+08 Trn A 7.800E+06 4.140E+06 .69 Stop - Program terminated.

NMP-ES-039- F02 E2 - 47 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 200f27

6. UHSSIM input/output for Fan2N 70F, 2-Fan Case with IBT of 70 OF Fan2N_ 70F. inp Vogtle UHS 2-Fan in-Service Case with 70 F initial basin temperature II ------------------------- - --- - --------------------------- - ----------------

II Mixed CIT model of 2 operable (full speed) and 2 failure fans w/ natural draft II initial basin temp. = 70 F, Max basin temp. < 97 F II PDAP Ci T characteristics KaV / L = 0 . 69 per tower performance data X4C1202V70 V2 II CI T bounding heat load for 1-train LOSP per Appendix AA of X4C1205V04 V2 (MUR)

II HL beyond Hr-36 are extrapolated to Hr-72 . 68 hr UHSSIM run time (Hr Hr-72)

II --------------------------------------------------- - ----------- - - - --------

II design wet-bulb temperature [F), design dry-bulb temperature [F),

II design hot-water temperature [F), design pressure [psia), design solids [ppt)

II 0 => F, psia, btu/hr, lbm/hr units 82, 95, 129.0, 14.696, 0.0, 0

initial basin mass [lbm) , initial basin temperature [F), initial solids [ppt) ,

II number of towers, starting time of simulation [hr) 29843200, 70, 0, 1, 4.

II Time Period Data - every 1 hr between the 4th hr and the 72nd hr after LOSP II step size, number of steps 1,68 Tower Operating Data II 5 character tower ID II time [hr) , water flow rate [lbm/hrl, air flow rate [lbm/hr), KaV/L II Train A Trn A 4 . 0 , 7.80e6,4 . 14e6,0.69 72.0,7 . 80e6,4.14e6,0 . 69 II Heat Rejection Data II time, time units (s second, h ho ur, d day), plant heat II rejection [btu/hrl 4h, 2. 5782E+08 5h, 2.4283E+08 6h, 2. 3455E+08 7h, 2.2896E+08 8h, 2.1036E+08 9h , 1.9697E+08 10h, 1.8700E+08 11h, 1.7951E+08 12h, 1. 7374E+08 13h, 1.6903E+08 14h, 1.6522E+08 15h, 1 . 6203E+08 16h, 1.5931E+08 17h, 1.5696E+08 18h , 1. 5499E+08 19h, 1. 5323E+08 20h, 1.5164E+08 21h, 1.5020E+08 22h, 1.4890E+08 23h, 1.4785E+08 24h, 1.4675E+08 25h, 1.4579E+08 26h, 1.4482E+08 27h, 1.4384E+08 28h, 1.4301E+08 29h, 1.4216E+08 30h, 1.4149E+08 31h, 1.4052E+08 32h, 1.3940E+08 33h, 1.3901E+08 34h, 1.3875E+08 35h, 1.3819E+08 36h, 1 . 3742E+08 72h, 1.1E+08 II Ambient Data Supplied by Bechtel Power Corp.

II TIME WB DB P II (hr) (F) (F) (psia) 4, 72.3, 72 . 3, 14 . 7 72, 72.3, 72.3, 14 . 7 NMP-ES-039- F02 E2 - 48 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 21of27 Fan2N 70F.out vogtle UHS 2 - Fan in-Service Case with 70 F initial basin temperature Initial Basin Mass 2.9848+07 Ibm Initial Basin Temperature 70 . 0 F Initial Basin Solids . 0 ppt time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr) [Ibm) [F) [ppt) [F) [F) [btu/hr) [lbm/hr) [lbm/hr) [- )

4.0 2 . 9848+07 70.0 .0 72 . 3 72 . 3 2.5788+08 Trn A 7.8008+06 4 . 1408+06 .69 5.0 2 . 977E+07 75.0 .0 72 . 3 72 . 3 2 . 4288+08 Trn A 7 . 8008+06 4.1408+06 . 69 6.0 2 . 9688+07 79.3 .0 72.3 72 . 3 2.3468+08 Trn A 7.8008+06 4 . 1408+06 . 69 7.0 2 . 958E+07 83 . 0 .0 72 . 3 72.3 2.2908+08 Trn A 7.8008+06 4 . 1408+06 . 69 8.0 2 . 9488+07 86.0 .0 72 . 3 72.3 2.104E+08 Trn A 7.8008+06 4 . 1408+06 . 69 9.0 2 . 9378+07 88 . 3 .0 72.3 72.3 1.970E+08 Trn A 7 . 800E+06 4 . 140E+06 . 69 10.0 2 . 9268+07 90 . 1 .0 72.3 72.3 1.870E+08 Trn A 7.800E+06 4.1408+06 . 69

11. 0 2.9158+07 91.6 .0 72.3 72.3 1.795E+08 Trn A 7.800E+06 4 . 1408+06 .69 12.0 2.9038+07 92.7 .0 72.3 72.3 1.737E+08 Trn A 7 . 800E+06 4.1408+06 .69 13.0 2.8918+07 93.7 .0 72.3 72.3 1.690E+08 Trn A 7.800E+06 4.140E+06 .69 14.0 2.8808+07 94.4 .0 72.3 72.3 1.652E+08 Trn A 7.800E+06 4.1408+06 .69 15.0 2.8688+07 95.0 .0 72.3 72.3 1 . 620E+08 Trn A 7.800E+06 4 . 140E+06 . 69 16.0 2.8568+07 95.5 .0 72.3 72.3 1.593E+08 Trn A 7.800E+06 4 . 140E+06 . 69 17.0 2.844E+07 95.9 .0 72.3 72 . 3 1.570E+08 Trn A 7.800E+06 4.140E+06 . 69 18.0 2.832E+07 96.2 .0 72.3 72.3 1.550E+08 Trn A 7.800E+06 4.140E+06 .69 19 . 0 2.8208+07 96 . 4 .0 72 . 3 72 .3 1.5328+08 Trn A 7.800E+06 4.14 OE+06 .69 20.0 2.8088+07 96 . 6 .0 72.3 72.3 1.5168+08 Trn A 7.800E+06 4.140E+06 .69 21.0 2.796E+07 96.7 .0 72.3 72.3 1.502E+08 Trn A 7.800E+06 4.14 OE+06 . 69 22.0 2.7848+07 96 . 8 .0 72.3 72.3 1.489E+08 Trn A 7.800E+06 4.140E+06 .69 23.0 2.7738+07 96.9 .0 72.3 72 .3 1. 479E+08 Trn A 7.800E+06 4.14 OE+06 . 69 24.0 2.7618+07 96.9 .0 72.3 72.3 1.468E+08 Trn A 7.800E+06 4.140E+06 .69 25.0 2.7498+07 96 . 9 .0 72.3 72.3 1.458E+08 Trn A 7.800E+06 4.140E+06 . 69 26.0 2.737E+07 96.9 .0 72.3 72.3 1.448E+08 Trn A 7.800E+06 4.140E+06 .69 27.0 2.7258+07 96.9 .0 72 .3 72.3 1.438E+08 Trn A 7.800E+06 4.140E+06 .69 28.0 2.714E+07 96.9 .0 72.3 72.3 1.4308+08 Trn A 7.800E+06 4.140E+06 .69 29.0 2.7028+07 96.9 .0 72.3 72.3 1.422E+08 Trn A 7.800E+06 4.140E+06 .69 30.0 2 . 6918+07 96.8 .0 72.3 72.3 1.415E+08 Trn A 7.800E+06 4.1408+06 . 69

31. 0 2.6798+07 96.8 .0 72.3 72.3 1. 405E+08 Trn A 7.8008+06 4.1408+06 .69 32.0 2.6688+07 96.7 .0 72 . 3 72.3 1. 394E+08 Trn A 7.8008+06 4.1408+06 .69 33.0 2.656E+07 96.7 .0 72.3 72.3 1. 390E+08 Trn A 7.800E+06 4.140E+06 .69 34.0 2 . 645E+07 96 . 6 .0 72.3 72.3 1.388E+08 Trn A 7.8008+06 4.1408+06 .69 NMP-ES-039- F02 E2 - 49 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 22of27 Vogtle UHS 2-Fan in-Service Case with 70 F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hrl [Ibm] [FI [ppt] [F] [FI [btu/hrl [lbm/hrl [lbm/hr] [ -I 35.0 2.634E+07 96.6 .0 72.3 72.3 1.3S2E+OS Trn A 7.S00E+06 4.140E+06 .69 36.0 2.623E+07 96.5 .0 72.3 72 .3 1.374E+OS Trn A 7.S00E+06 4.140E+06 .69 37.0 2.611E+07 96.5 .0 72.3 72 . 3 1.367E+OS Trn A 7.S00E+06 4.140E+06 .69 3S.0 2.600E+07 96.4 .0 72 .3 72.3 1. 359E +OS Trn A 7.S00E+06 4 . 140E+06 .69 39.0 2.5S9E+07 96.3 .0 72.3 72 . 3 1 . 351E+OS Trn A 7.S00E+06 4.140E+06 .69 40.0 2.57SE+07 96.3 .0 72.3 72 .3 1. 344E+OB Trn A 7.BOOE+06 4.140E+06 .69 41.0 2.567E+07 96.2 .0 72.3 72.3 1. 336E+OB Trn A 7.BOOE+06 4.140E+06 .69 42 . 0 2.557E+07 96 . 1 .0 72.3 72.3 1. 329E+OB Trn A 7.BO OE+06 4 . 140E+06 . 69 43 . 0 2.546E+07 96 . 1 .0 72 . 3 72.3 1.321E+OB Trn A 7.BO OE+06 4 . 140E+06 . 69 44 . 0 2.535E+07 96.0 .0 72.3 72.3 1.313E+OB Trn A 7.B OOE+06 4.140E+06 . 69 45.0 2 . 524E+07 95 . 9 .0 72 .3 72.3 1.306E+OB Trn A 7.BOOE+06 4.140E+06 .69 46.0 2.514E+07 96 . 0 .0 72.3 72.3 1 . 29SE+OB Tr n A 7.BOOE+06 4.140E+06 .69 47.0 2.504E+07 96.0 .0 72.3 72 .3 1.290E+OB Trn A 7 . S00E+06 4.140E+06 .69 4B.0 2.494E+07 96 .1 .0 72.3 72.3 1 . 2B3E+OB Trn A 7.BOOE+06 4.140E+06 .69 49.0 2.4B4E+07 96.1 .0 72.3 72.3 1 . 275E+OB Trn A 7 . BOOE+06 4 .140E+06 .69 50.0 2.473E+07 96.1 .0 72.3 72 .3 1. 26BE+O B Trn A 7.BOOE+06 4.140E+06 .69

51. 0 2 . 463E+07 96 .1 .0 72.3 72 .3 1.260E+OB Trn A 7.BOOE+06 4.140E+06 .69 52.0 2.453E+07 96.1 .0 72.3 72.3 1.252E+OB Trn A 7.BOOE+06 4.140E+06 .69 53.0 2 . 443E+07 96.0 .0 72.3 72.3 1.245E+OB Trn A 7.BOOE+06 4.140E+06 . 69 54.0 2.433E+07 96.0 .0 72.3 72.3 1.237E+OB Trn A 7.BO OE+06 4.140E+06 . 69 55.0 2.424E+07 95.9 .0 72 . 3 72.3 1.229E+OB Trn A 7.BOOE+06 4.140E+06 . 69 56 . 0 2.414E+07 95 . 9 .0 72 .3 72 .3 1.222E+OS Trn A 7.S00E+06 4.140E+06 .69 57.0 2.404E+07 95 . S .0 72.3 72 .3 1.214E+OS Trn A 7.S00E+06 4.140E+06 .69 5S.0 2.394E+07 95.B .0 72.3 72.3 1 .207E+O B Trn A 7 . BOOE+06 4.140E+06 .69 59.0 2.3B5E+ 0 7 95.7 .0 72.3 72.3 1 . 199E+OB Trn A 7.BOOE+06 4.14 0E +06 .69 60.0 2.375E+07 95.6 .0 72.3 72 . 3 1.191E+OB Trn A 7.BOOE+06 4.140E+06 .69 61.0 2.365E+07 95.5 .0 72.3 72 . 3 1.lB4E+OB Trn A 7.BOOE+06 4.140E+06 .69 62.0 2.356E+07 95.5 .0 72.3 72.3 1.176E+OB Trn A 7.BOOE+06 4.140E+06 .69 63.0 2 . 347E+07 95.4 .0 72.3 72 .3 1.169E+OB Trn A 7.BOOE+06 4.140E+06 .69 64.0 2 . 337E+07 95.3 .0 72.3 72.3 1.161E+OB Trn A 7.BOOE+06 4.140E+06 .69

65. 0 2 . 32BE+07 95.2 .0 72.3 72.3 1.153E+OB Trn A 7.BOOE+06 4.140E+06 .69 66.0 2 . 319E+07 95.1 .0 72.3 72.3 1.146E+OB Trn A 7.BOOE+06 4.140E+06 .69 67.0 2.309 E+07 95.1 .0 72 . 3 72.3 1.13BE+OS Trn A 7.S00E+06 4.140E+06 .69 6S.0 2.300E+07 95.0 .0 72.3 72.3 1 . 130E+OS Trn A 7 . S00E+06 4.140E+06 .69 69.0 2.291E+ 07 94 . 9 .0 72 .3 72.3 1.12 3E+O S Trn A 7.S00E+06 4.140E+06 .69 NMP-ES-039- F02 E2 - 50 N MP-ES-039-00 1 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 230f27 Vogtle UHS 2-Fan in-Service Case with 70 F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr) [ibm] [FJ [ppt] [F) [F] [btu/hr] [lbm/hrJ [ibm/hr] [-J 70.0 2.2B2E+07 94.B .0 72.3 72.3 1.11SE+OB Trn A 7.BOOE+06 4.140E+06 .69

71. 0 2.273E+07 94 . 7 .0 72.3 72.3 1.108E+OB Trn A 7.800E+06 4.140E+06 .69 72.0 2.26SE+07 94.6 .0 72.3 72.3 1 . 100E+08 Trn A 7.800E+06 4.140E+06 .69 Stop - Program terminated.

NMP-ES-039- F02 E2 - 51 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 24of27

7. UHSSIM input/output for Fan2N 65F, 2-Fan Case with IBT of 65 of Fan2N_65F. inp Vogtle UHS 2-Fan in-Service Case with 65 F initial basin temperature

Mixed CIT model of 2 operable (full speed) and 2 failure fans w/ natural draft

initial basin temp. ~ 65 F, Max basin temp. < 97 F n PDAP CiT characteristics KaV/L ~ 0.69 per tower performance data X4C1202V70 V2 n CIT bounding heat load for 1-train LOSP per Appendix AA of X4C1205V04 V2 (MUR) n HL beyond Hr-36 are extrapolated to Hr-72. 6S hr UHSSIM run time (Hr Hr-72) n ------------------------------------------------------------------ -----------

design wet-bulb temperature [Fl, design dry-bulb temperature [Fl,

design hot-water temperature [Fl, design press ure [psia], design solids [pptl n 0 ~> F, psia, btu/hr, lbm/hr units S2, 95, 129 .0 , 14.696, 0.0, 0

initial basin mass [lbml, initial basin temperature [Fl, initial solids [pptl, n number of towers, starting time of simulation [hrl 29843200, 65, 0, 1, 4 .

n Time Period Data -- every 1 hr between the 4th hr and the 72nd hr after LOSP

step size, number of steps l,6S Tower Operating Data

5 character tower ID

time [hrl, water flow rate [lbm/hrl, air flow rate [lbm/hrl, KaV/L

Train A Trn A 4.0,7.S0e6,4.14e6,O.69 72.0,7.S0e6,4.14e6,O.69 n Heat Rejection Data n time, time units (9 second, h hour, d day), plant heat

rejection [btu/hrl 4h, 2.5782E+OS 5h, 2.4283E+OS 6h, 2.34 55E+08 7h, 2. 2S96E+OS Sh, 2. 1036E+OS 9h, 1.9697E+OS 10h, 1.S700E+OS 11h, 1.7951E+OS 12h, 1. 7374E+08 13h, 1.6903E+OS 14h, 1.6522E+OS 15h, 1.6203E+OS 16h, 1.5931E+OS 17h, 1.5696E+OS lSh, 1.5499E+OS 19h, 1.5323E+OS 20h, 1.5164E+08 21h, 1. 5020E+OS 22h, 1.4890E+OS 23h, 1.4785E+OS 24h, 1 .46 75E+08 25h , 1.4579E+OS 26h, 1. 44S2E+OS 27h, 1.43S4E+OS 2Sh, 1.4301E+08 29h, 1.4216E+OS 30h, 1.4149E+OS 31h, 1.4052E+OS 32h, 1.3940E+OS 33h, 1.3901E+OS 34h, 1.3 S75E+OS 35h, 1.3S19E+08 36h, 1.3742E+OS 72h, 1.lE+08

/I Ambient Data Supplied by Bechtel Power Corp.

/I TIME WB DB P

/I (hr) (F) (F) (psia) 4, 72.6, 72 .6 , 14.7 72, 72.6, 72 . 6, 14.7 NMP-ES-039- F02 E2 - 52 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Calculation Number:

X4C1202V70 250f27 Fan2N_65F.out Vogtle UHS 2-Fan in-Service Case with 65 F initial basin temperature Initial Basin Mass 2.984E+07 Ibm Initial Basin 65.0 F Initial Basin .0 ppt time basin basin basin dry-bulb wet-bulb heat load tower water air KaV!L mass temp solids temp flow rate flow rate

[hrJ [lbm] [F] [ppt] [F] [btu/hr] [lbm/hrJ [lbm/hr]

4.0 2 984E+07 65.0 ,0 72.6 72 6 2.57BE+OB Trn A 7,BOOE+06 . 140E+06 .69 5 0 2.978E+07 70.6 .0 72.6 72.6 2.42BE+08 Trn A 7.800E+06 4.140E+06 .69 6.0 2.971E+07 75.4 .0 72,6 72.6 2.346E+OB Trn A 7 800E+06 4.140E+06 .69 7.0 2.962E+07 79 6 ,0 72.6 12.6 2.290E+08 Trn A 7,BOOE+06 4.140E+06 .69 B.O 2.953E+07 83 1 ,0 72.6 72.6 2.104E+OS Trn A 7.BOOE+06 4.140E+06 .69 9.0 2.944E+07 85.9 .0 72.6 72.6 1.970E+08 Trn A 7.S00E+06 4.140E+06 ,69 10.0 2.934E+07 88.2 .0 72.6 72.6 1,870E+OB Trn A 7.BOOE+06 4.140E+06 .69

11. 0 2 923E+07 90.0 .0 72.6 72.6 1.795E+OB Trn A 7.BOOE+06 4.140E+06 .69 12,0 2.912E+07 91 4 .0 72.6 72.6 1.737E+08 Trn A 7. BOOE+06 4.14 08+06 .69 13 .0 2.901E+07 92.6 .0 72.6 72.6 1.690E+08 Trn A 7.BOOE+06 4.140E+06 .69 14 0 2.890E+07 93.5 .0 72.6 72.6 1 652E+08 Trn A 7.800E+06 4.140E+06 .69 15.0 2.B79E+07 94.2 .0 72.6 72.6 1.620E+08 Trn A 7,BOOE+06 4.1408+06 .69 16.0 2.S67E+07 94.9 .0 72.6 72.6 1.593E+08 Trn A 7.800E+06 4.140E+06 .69 17.0 2.85SE+07 95.4 .0 72.6 72.6 .570E+OB Trn A 7.800E+D6 4.14 DE+06 .69 18.0 2.B44E+07 95.7 .a 72 .6 72 ,6 1.550E+OB Trn A 7.800E+06 4.1408+06 .69 19.0 2.832E+07 96. 0 72.6 72 6 1.532E+08 Trn A 7.S00E+06 4 14 OE+OG .69 20.0 2.820E+07 96.3 .0 72.6 72,6 1.516E+08 Trn A 7.800E+06 4.140E+06 .69 21.0 2.808E+07 96.5 .0 72.6 72.6 1. 502E+OS Trn A 7.BOOE+06 4,140E+06 .69 22,0 .797E+07 96.6 0 72,6 72 .6 .489E+OB Trn A 7.BOOE+06 4.140E+06 .69 23.0 2.785E+07 96.8 0 72.6 72.6 1. 479E+OB Trn A 7.S00E+06 4.140E+06 .69 24.0 2.773E+07 96.8 .0 72.6 72.6 1.468E+08 Trn A 7.8008+06 4.140E+06 .69 25.0 2.761E+07 96.9 .0 72.6 72 .6 1.4588+08 Trn A 7.800E+06 4 140E+06 .69 26.0 2.750E+07 96.9 .0 72.6 72 .6 1.4488+08 Trn A 7.800E+06 4.140E+06 .69 27.0 2 738E+07 96.9 .0 72.6 72 .6 1.438E+OB Trn A 7.800E+06 4.140E+06 .69 28.0 2.7268+07 96 .9 .0 72.6 72.6 1.430E+08 Trn A 7.BOOE+06 4.140E+06 .69 29.0 2.715E+07 96.9 .0 72.6 72.6 1.422E+08 Trn A 7.800E+06 4.140E+06 .69 30.0 2.703E+07 96.9 .0 72.6 72 .6 1 415E+08 Trn A 7 800E+06 4.140E+06 .69

31. 0 2.692E+07 96.9 .0 72.6 72.6 1.405E+OB Trn A 7.800E+06 4.140E+06 .69 32.0 2.680E+07 96.8 .0 72.6 72.6 1.394E+08 Trn A 7.800E+06 4.140E+06 .69 33.0 2 669E+07 96.8 .0 72.6 72.6 1 390E+OB Trn A 7 800E+06 4.140E+06 .69

34. 0 2.6SBE+07 96. ,0 72.6 72 6 1.38SE+OS Trn A 7.800E+06 4.140E+06 .69 E2 -53 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 26 0f27 Vogtle UHS 2-Fan in-Service Case with 65 F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flo w rate (hr) [Ibm] [F] (ppt ] (F] [F] [btu/hr] [lbm/hr) [lbm/hr ] [ -]

35.0 2.64 7 E+07 96.7 .0 72 . 6 72 .6 1.382E+08 Trn A 7.800E+06 4.140E+06 .69 36.0 2.635E+07 96.6 .0 72.6 72 . 6 1 . 374E+08 Trn A 7 . 800E+06 4.140E+06 .69 37.0 2.624E+07 96.6 .0 72.6 72 .6 1.367E+08 Trn A 7.800E+06 4.140E+06 .69 38.0 2.613E+07 96 . 5 .0 72.6 72.6 1. 359E+08 Trn A 7.800E+06 4.140E+06 . 69 39.0 2 . 602E+07 96.5 .0 72.6 72.6 1 . 351E+08 Trn A 7.800E+06 4.140E+06 . 69 40.0 2.591E+07 96.4 .0 72.6 72.6 1. 344E+08 Trn A 7 . 800E+06 4.140E+06 . 69 41.0 2.580E+07 96.3 .0 72.6 72.6 1 . 336E+08 Trn A 7.800E+06 4.140E+06 .69 42.0 2.569E+07 96 . 3 .0 72.6 72 .6 1.329E+08 Trn A 7.800E+06 4 . 140E+06 .69 43.0 2.558E+07 96 . 2 .0 72.6 72 .6 1 . 321E+08 Trn A 7.800E+06 4.140E+06 .69 44.0 2.548E+07 96.1 .0 72.6 72 .6 1. 313E+08 Trn A 7.800E+06 4.140E+06 .69 45.0 2.537E+07 96.1 .0 72.6 72 .6 1.306E+08 Trn A 7 . 800E+06 4.140E+06 .69 46.0 2.527E+07 96.0 .0 72.6 72 .6 1.298E+08 Trn A 7 . 800E+06 4 . 140E+06 .69 47.0 2.516E+07 96.0 .0 72.6 72 . 6 1.290E+08 Trn A 7.800E+06 4.140E+06 .69 48.0 2. 506E+07 96.1 .0 72.6 72.6 1.283E+08 Trn A 7.800E+06 4.140E+06 .69 49.0 2 .496E+07 96.1 .0 72.6 7 2.6 1.275E+08 Trn A 7.800E+06 4.140E+06 .69 50.0 2.486E+07 96 . 1 .0 72.6 72 .6 1.268E+08 Trn A 7.800E+06 4.140E+06 . 69

51. 0 2.476E+07 96.1 .0 72.6 72 . 6 1. 260E+08 Trn A 7.800E+06 4.140E+06 . 69 52.0 2.466E+07 96.1 .0 72 . 6 72.6 1 . 252E+08 Trn A 7.800E+06 4 . 140E+06 . 69 53.0 2.456E+07 96.1 .0 72.6 72 . 6 1. 245E+08 Trn A 7.800E+06 4 . 140E+06 .69 54.0 2.446E+07 96 . 1 .0 72.6 72.6 1. 237E+08 Trn A 7.800E+06 4.140E+06 .69 55.0 2.436E+07 96.0 .0 72.6 72.6 1.229E+08 Trn A 7 . 800E+06 4 . 140E+06 .69 56 . 0 2 . 426E+07 96.0 .0 72.6 72.6 1 . 222E+08 Trn A 7.800E+06 4.140E+06 .69 57.0 2.416E+07 95.9 .0 72.6 72 .6 1.214E+08 Trn A 7.800E+06 4.140E+06 .69 58 . 0 2.407E+07 95.9 .0 7 2.6 72 .6 1.207E+08 Trn A 7 . 800E+06 4.140E+06 .69 59 . 0 2.397E+07 95.8 .0 72.6 72 .6 1.199E+08 Trn A 7.800E+06 4.140E+06 . 69 60.0 2.387E+07 95.7 .0 72.6 72.6 1.191E+08 Trn A 7.800E+06 4.140E+06 .69

61. 0 2.378E+07 95.7 .0 72.6 72 .6 1.184E+08 Trn A 7 . 800E+06 4 . 140E+06 .69 62.0 2 . 368E+07 95.6 .0 72.6 72.6 1.1 76E+08 Trn A 7.800E+06 4.140E+06 .69 63.0 2.359E+07 95.5 .0 72.6 72 . 6 1.169E+08 Trn A 7.800E+06 4 . 140E+06 .69 64.0 2.350E+07 95 . 4 .0 72.6 72 . 6 1.161E+08 Trn A 7.800E+06 4.140E+06 .69 65.0 2.340E+07 95 . 4 .0 72.6 72.6 1.153E+08 Trn A 7.800E+06 4.140E+06 .69 66.0 2.331E+0 7 95.3 .0 72.6 72.6 1 . 146E+08 Trn A 7.800E+06 4.140E+06 . 69 67.0 2.322E+07 95.2 .0 72 .6 72.6 1.138E+08 Trn A 7.800E+06 4.140E+06 . 69 68.0 2.313E+07 95.1 .0 72 . 6 72 .6 1.130E+08 Trn A 7.800E+06 4.140E+06 .69 69 . 0 2.304E+07 95.0 .0 72 . 6 72 .6 1.123E+08 Trn A 7 . 800E+06 4.140E+06 .69 NMP-ES-039- F02 E2 - 54 NMP-ES-039-00 1 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 4 VEGP X4C1202V70 27of27 Vogtle UHS 2-Fan in-Service Case with 65 F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr] [lbm] [F] [ppt] [F] [Fl [btu/hrl [lbm/hrl [lbm/hrl [ -1 70.0 2.295E+07 94.9 .0 72.6 72.6 1.1l5E+OB Trn A 7.BOOE+06 4.140E+06 .69 71.0 2.2B6E+07 94.9 .0 72.6 72.6 1.10BE+OB Trn A 7.BOOE+06 4.140E+06 .69 72.0 2.277E+07 94.B .0 72.6 72.6 1.100E+OB Trn A 7.BOOE+06 4.140E+06 .69 Stop - Program terminated.

NMP-ES-039- F02 E2 - 55 NMP-ES-039-00 1 to NL-12-2564 Response to '\v\.l!Uv.;>l for Additional Information Calculations ATTACHMENT 5 3-Fan Case PDAPIUHSSIM Runs Attachment 5 Table of Contents Page No.

1. PDAP input/output for pdap3-1, CIT characteristics for 3-Fan Case . . . . . . . . . . . . . . . . . . . . . 2

2. UHSSIM input/output for Fan3N_90F, 3-Fan Case with IBT of 90 of . . . . . . . * .. . . . . . . 4 56 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 5 VEGP X4C1202V70 20f7

1. PDAP input/output for pdap3-1, CIT characteristics for 3-Fan Case Pdap3-1.inp

Vogtle CIT Performance Data Per X4C1202V70, Ver 2

original water flow rate & 3 fan operation

100% water flow rate = 15,600 gpm = 7.8e6 lbm/hr

air flow rate = 3

2,071,121 lbm/hr = 6.21e6 lbm/hr

original design point: twb = 82 F, tdb = 95 F, tw = 129 F 7 . 8e6, 6.21e6, 0.0, 14.696,82,95,129, 0, 13.0 8.5, 65, 75.8 8.5, 70, 79.5 8.5,75,83.2 8.5, 80, 87.3 8.5, 85, 91.1 15 . 0, 65, 82 15.0, 70, 85 15.0, 75, 88.3 15 . 0, 80, 91.8 15.0, 85, 95.1 25.0, 65, 89.1 25.0, 70, 91.6 25.0, 75, 94.1 25.0, 80, 97 25.0, 85, 100 37.4, 65, 95 37.4, 70, 97 37.4, 75, 99.1 37.4, 80, 101.4 37.4, 85, 104 NMP-ES-039- F02 E2 - 57 NMP-ES-039-001

2 to NL-12-2564 to Request for Additional Information Southern Nuclear Calculations Calculation Number: Sheet: AUachment X4C1202V70 3 or Pdap3-1.out nVogtle CIT Performance Data Per X4C1202V70, Ver 2 noriginal water flow rate & 3 fan operation

100\ water flow rate = 15,600 7.8e6

air flow rate = 3

2,071,121 = 6.21e6

twb = 82 F, tdb = 95 F, tw 129 F

7. ,6.21e6 . , 14.696, 82, 95, 129, 0, 13.0 8.5, 65, 75.8 8.5, 70, 79.5 8.5, 75, 83.2 8.5, 80, 87.3 8.5, 85, 91.1 15.0, 65, 82 15.0, 70, 85 IS.0, 7S, 88.3 IS.0, 80, 91.8 15.0, 85, 9S 1 2S.0, 65, 89.

25.0, 70, 91.

25.0, 7S. 94.1 25.0, 80, 97 2S.0, 85, 100 37.4, 65, 95 37.4, 70, 97

75. 99.1 80, 101.4 104

.86 range, wb, hot, cold, difference

8.5 65.0 84.3 .8 76.4 .6

8.5 70.0 88.0 79.5 80.1 .6 Ii 8.5 75.0 91. 7 83.2 83.8 .6 Ii 8.5 80.0 95.8 87.3 87.8 .5 Ii 8.5 85.0 99.6 91.1 91. 7 .6 n 15.0 65.0 97.0 82.0 82.8 .8 Ii 15.0 70.0 100.0 85.0 86.0 1.0 Ii 15.0 75.0 103.3 88.3 89.1 .8 Ii 15.0 80.0 106.8 91. 8 92.2 .4 Ii 15.0 85.0 110.1 95.1 95.5 .4

25.0 65.0 114.1 89.1 89 6 .5 II 25.0 70.0 116.6 91. 6 91. 9 .3 II 25.0 75.0 119.1 94.1 94.4 .3 II 25 0 80.0 122.0 97.0 97.1 .1 Ii 25 0 85.0 125 0 100.0 99.9 1 II 37 4 65.0 132.4 95.0 94.8 -.2 II 37.4 70.0 134.4 97 a 96.7 -.3 Ii 37 4 75.0 136.5 99 1 98.7 -.4 Ii 37.4 80.0 138.8 101.4 100.9 -.5 II 37.4 85.0 141. 4 104.0 103.3 .7 Stop Program terminated.

E2 - 58 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 5 VEGP X4C1202V70 40f7

2. UHSSIM input/output for Fan3N 90F, 3-Fan Case with IBT of 90 of Fan3N_90F. inp Vogtle UHS 3-Fan in-Service Case with 90 F initial basin temperature

Mixed CiT model of 3 operable (full speed) and 1 failure fans w/ natural draft

initial basin temp. = 90 F, Max basin temp. < 97 F

PDAP CiT characteristics KaV/L = 0.B6 per tower performance data X4C1202V70 V2

CiT bounding heat load for 1-train LOSP per Appendix AA of X4C1205V04 V2 (MUR)

HL beyond Hr-36 are extrapolated to Hr-72. 6B hr UHSSIM run time (Hr Hr-72)

design wet-bulb temperature [F], design dry-bulb temperature [F],

design hot-water temperature [F], design pressure [psia], design solids [ppt]

0 => F, psia, btu/hr, lbm/hr units B2, 95, 129.0, 14.696, 0.0, 0

initial basin mass [lbm] , initial basin temperature [F], initial solids [ppt] ,

number of towers, starting time of simulation [hr]

29B43200, 90, 0, 1, 4.

Time Period Data -- every 1 hr between the 4th hr and the 72nd hr after LOSP

step size, number of steps 1,6B Tower Operating Data

5 character tower ID

time [hr] , water flow rate [lbm/hr], air flow rate [lbm/hr], KaV/L

Train A Trn A 4.0,7.BOe6,6.21e6,0.B6 72.0,7.BOe6,6.21e6,0.B6

Heat Rejection Data

time, time units (s second, h hour, d day), plant heat

rejection [btu/hr]

4h, 2.57B2E+OB 5h, 2. 42B3E+OB 6h, 2.3455E+OB 7h, 2.2B96E+OB Bh, 2.1036E+OB 9h, 1.9697E+OB 10h, 1.B700E+OB 11h, 1.7951E+OB 12h, 1.7374E+OB 13h, 1.6903E+OB 14h, 1.6522E+OB 15h, 1.6203E+OB 16h, 1.5931E+OB 17h, 1.5696E+OB 1Bh, 1.5499E+OB 19h, 1.5323E+OB 20h, 1.5164E+OB 21h, 1.5020E+OB 22h, 1.4B90E+OB 23h, 1.47B5E+OB 24h, 1.4675E+OB 25h, 1.4579E+OB 26h, 1.44B2E+OB 27h, 1.43B4E+OB 2Bh, 1.4301E+OB 29h, 1.4216E+OB 30h, 1.4149E+OB 31h, 1.4052E+OB 32h, 1.3940E+OB 33h, 1.3901E+OB 34h, 1.3B75E+OB 35h, ] .3B19E+OB 36h, 1.3742E+OB 72h, 1.lE+OB

Ambient Data Supplied by Bechtel Power Corp.

TIME WE DB P

(hr) (F) (F) (psia) 4, B2.1, B2.1, 14.7 72, B2.1, B2.1, 14.7 NMP-ES-039- F02 E2 - 59 N M P-ES-039-00 1 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 5 VEGP X4C1202V70 50f7 Fan3N 90F.out Vogtle U1lS 3-Fan in-Service Case with 90 F initial basin temperature Initial Basin Mass 2.984E+07 Ibm Initial Basin Temperature 90.0 F Initial Basin Solids .0 ppt time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr] [Ibm] [F] [ppt] [F] [F] [btu/hr] [lbm/hr] [lbm/hr] [ -]

4.0 2.984E+07 90.0 .0 82.1 82.1 2.578E+08 Trn A 7.800E+06 6.210E+06 .86 5.0 2.968E+07 91. 9 .0 82.1 82.1 2.428E+08 Trn A 7.800E+06 6.210E+06 .86 6.0 2 952E+07 93.4 .0 82.1 82.1 2.346E+08 Trn A 7.800E+06 6.210E+06 .86 7.0 2.935E+07 94.5 .0 82.1 82.1 2.290E+08 Trn A 7.800E+06 6.210E+06 86 8.0 2.919E+07 95.4 .0 82.1 82.1 2.104E+08 Trn A 7.800E+06 6.210E+06 .86 9.0 2.903E+07 96.0 .0 82.1 82.1 1. 970E+08 Trn A 7.800E+06 6.210E+06 .86 10.0 2.888E+07 96 .4 .0 82.1 82.1 1. 870E+08 Trn A 7.800E+06 6.210E+06 .86 1l. 0 2.873E+07 96.7 .0 82.1 82.1 1. 79 5E+08 Trn A 7.800E+06 6.210E+06 86 12.0 2.859E+07 96.8 .0 82.1 82.1 l. 73 7E+0 8 Trn A 7.800E+06 6.210E+06 .86 13.0 2.845E+07 96.9 .0 82.1 82.1 1.690E+08 Trn A 7.800E+06 6.210E+06 .86 14.0 2.831E+07 96.9 .0 82.1 82.1 1.652E+08 Trn A 7.800E+06 6.210E+06 .86 15.0 2.817E+07 96.9 .0 82.1 82.1 1.620E+08 Trn A 7.800E+06 6.210E+06 86 16.0 2.804E+07 96.9 .0 82.1 82.1 1.593E+08 Trn A 7.800E+06 6.210E+06 .86 17.0 2.790E+07 96.8 .0 82.1 82.1 1.570E+08 Trn A 7.800E+06 6.210E+06 .86 18.0 2.777E+07 96.8 .0 82.1 82.1 1.550E+08 Trn A 7.800E+06 6.210E+06 .86 19.0 2.764E+07 96 7 0 82.1 82 1 1.532E+08 Trn A 7.800E+06 6.210E+06 86 20.0 2.751E+07 96.6 .0 82.1 82.1 1.516E+08 Trn A 7.800E+06 6.210E+06 .86

21. 0 2.739E+07 96.5 .0 82.1 82.1 1.502E+08 Trn A 7.800E+06 6.210E+06 .86 22.0 2.726E+07 96.5 .0 82.1 82.1 1.489£+08 Trn A 7.800E+06 6.2108+06 .86 23.0 2.714E+07 96 4 0 82 1 82 1 1.479E+08 Trn A 7 800E+06 6.210E+06 86 24.0 2.701E+07 96.3 .0 82.1 82.1 l. 468E+08 Trn A 7.800E+06 6.210E+06 .86 25.0 2.689E+07 96.2 .0 82.1 82.1 l. 458E+08 Trn A 7.800E+06 6.210E+06 .86 26.0 2.677E+07 96.2 .0 82.1 82.1 1.448E+08 Trn A 7.800£+06 6.210E+06 .86 27.0 2.665E+07 96.1 .0 82.1 82.1 1. 43 88+08 Trn A 7.800E+06 6.2108+06 .86 28.0 2.653E+07 96.0 .0 82.1 82.1 1. 43 08+08 Trn A 7.800E+06 6.210E+06 .86 29.0 2.641E+07 96.0 .0 82.1 82.1 1.422E+08 Trn A 7.800E+06 6.210E+06 .86 30.0 2.629E+07 95.9 .0 82.1 82.1 1. 415E+08 Trn A 7.800E+06 6.210E+06 .86

31. 0 2.617E+07 95.8 .0 82.1 82.1 1. 40 5E+0 8 Trn A 7.800E+06 6.210E+06 .86 32.0 2.6068+07 95.8 .0 82.1 82.1 1.394E+08 Trn A 7.800E+06 6.210£+06 .86 33.0 2.594E+07 95.7 .0 82.1 82.1 1.390E+08 Trn A 7.800E+06 6.210E+06 .86 34.0 2.582E+07 95.7 .0 82.1 82.1 1.388E+08 Trn A 7.800E+06 6.210E+06 .86 NMP-ES-039- F02 E2 - 60 NMP-ES-039-001 to NL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 5 VEGP X4C1202V70 60f7 Vogtle UHS 3 - Fan in-Service Case with 90 F initial basin temperature time ba s in basin basin dry - bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate fl o w rate

[hr] [ibm] [F] [ppt] [F] [F] [btu/hr] [lbm/hr ] [lbm/hr] [-]

35.0 2.571E+07 95 . 6 .0 82 . 1 82 . 1 1.382E+08 Trn A 7 . 800E+06 6.210E+06 . 86 36.0 2.559E+0 7 95 . 6 .0 82 . 1 82.1 1.374E+08 Trn A 7 . 800E+06 6.210E+ 06 . 86 37.0 2.548E+07 95.6 .0 82 . 1 82.1 1 . 367E+08 Trn A 7 . 800E+06 6.210E+06 .86 38.0 2.537E+07 95 . 5 .0 82 . 1 82.1 1. 359E+08 Trn A 7 . 80 0 E+06 6.210E+06 .86 39.0 2.525E+07 95 . 5 .0 82 . 1 82.1 1. 351E+08 Trn A 7 . 8 0 0E+06 6.210E+06 .86 40 . 0 2.514E+07 95 . 4 .0 82.1 82 . 1 1. 344E+08 Trn A 7.800E+06 6.210E+06 .86 41.0 2 . 503E+07 95.4 .0 82 . 1 82 . 1 1. 33 6E+08 Trn A 7.800E+06 6.210E+06 .86 42.0 2 . 4928+07 95.3 .0 82.1 82 . 1 1. 32 9E+08 Trn A 7.800E+06 6 . 2108+06 .86 43.0 2 , 4818+07 95.3 .0 82.1 82 . 1 1. 3218+ 0 8 Trn A 7.8008+06 6 . 2108+06 .86 44.0 2 "~708+07 95.2 .0 82.1 82.1 1.3138+08 Trn A 7.8008+06 6 . 2108+06 .86 45.0 2 . 4598+07 95.2 .0 82.1 82 . 1 1.3068+08 Trn A 7.8008+06 6 . 210E+06 .86 46.0 2 . 448E+07 95.1 .0 82.1 82.1 1 . 2988+08 Trn A 7 . 8008+06 6.210E+06 .86 47.0 2.438E+07 95 . 1 .0 82 . 1 82.1 1 . 2908+08 Trn A 7 . 8008+06 6.210E+06 . 86 48.0 2.4278+07 95 . 0 .0 82.1 82.1 1 . 2838+08 Trn A 7 . 800E+06 6.2108+06 . 86 49 . 0 2.4168+07 95. 0 .0 82 . 1 82.1 1. 275E+08 Trn A 7 . 800E+06 6.2108+06 . 86 50.0 2.4068+07 94.9 .0 82.1 82.1 1. 2 688+08 Trn A 7 . 8008+06 6.2108+06 . 86

51. 0 2 . 3958+07 94.9 .0 82.1 82.1 1. 26 OE+08 Trn A 7 . 8 00 8+06 6 . 2108+06 .86 52.0 2.3858+07 94.8 .0 82.1 82 . 1 1. 252E+08 Trn A 7.800E+06 6 . 2108+06 .86 53.0 2 . 3758+07 94.8 .0 82.1 82.1 1. 24 58+08 Trn A 7.8008+06 6 . 2108+06 .86 54.0 2 . 3648+07 94.7 .0 82.1 82.1 1. 2378+08 Trn A 7.8008+06 6 . 2108+06 .86 55.0 2 . 354E+07 94.7 .0 82.1 82 . 1 1.2298+08 Trn A 7.8008+06 6 . 210E+06 .86 56.0 2.344E+07 94.6 .0 82.1 82 . 1 1.222E+08 Trn A 7.800E+06 6 . 2108+06 .86 57.0 2 . 334E +07 94.6 .0 82.1 82.1 1.214E+08 Trn A 7.800E+06 6.210E+06 .86 58.0 2.324E+07 94.5 .0 82 . 1 82.1 1. 2078+08 Trn A 7 . 800E+06 6.210E+06 .86 59 . 0 2.3148+07 94.4 .0 82 . 1 82.1 1.1998+08 Trn A 7 . 8008+06 6.210E+06 .86 60 . 0 2.3048+07 94 . 4 .0 82 . 1 82.1 1.191E+08 Trn A 7 . 8008+06 6.210E+06 .86 61.0 2.294E+07 94 . 3 .0 82 . 1 82.1 1 . 184E+08 Trn A 7.80 0 8+06 6.210E+06 .86 62 . 0 2.2858+07 94.3 .0 82 . 1 82.1 1 . 176E+08 Trn A 7.8 00 8+06 6.210E+06 . 86 63.0 2.27 5E+07 94.2 .0 82.1 82.1 1.169E+08 Trn A 7.800E+06 6 . 2108+06 .86 64.0 2 . 2658+07 94.2 .0 82.1 82 . 1 1.161E+08 Trn A 7.800E+06 6 . 2108+06 .86 65.0 2 . 256E+07 94.1 .0 82.1 82 . 1 1.1538+08 Trn A 7.800E+06 6 . 21 08+06 .86 66.0 2.246E+07 94.1 .0 82.1 82.1 1.14 68+08 Trn A 7.800E+06 6 . 2 1 0E+06 .86 67.0 2 . 2378+07 94 . 0 .0 82.1 82.1 1.13 88+08 Trn A 7.8008+06 6.210E+06 .86 68.0 2.2288+07 94 . 0 .0 82 . 1 82 . 1 1 . 13 OE+08 Trn A 7 . 800E+06 6.210E+06 .86 69 . 0 2.218E+07 93 . 9 .0 82 . 1 82.1 1 . 123E+08 Trn A 7 . 8008+06 6.210E+06 . 86 NMP-ES-039- F02 E2 - 61 NMP-ES-039-00 1 to I\JL-12-2564 Response to Request for Additional Information Southern Nuclear Design Calculations Plant: Calculation Number: Sheet: Attachment 5 VEGP X4C1202V70 70f7 Vogtle UHS 3-Fan in-Service Case with 90 F initial basin temperature time basin basin basin dry-bulb wet-bulb heat load tower water air KaV/L mass temp solids temp temp flow rate flow rate

[hr] [lbm] [F] [ppt] [F] [F] [btu/hr] [lbm/hr] [lbm/hr] [ -]

70.0 2.209E+07 93.9 .0 82.1 82.1 1.11SE+08 Trn A 7.800E+06 6.210E+06 .86

71. 0 2.200E+07 93.8 .0 82.1 82.1 1.108E+08 Trn A 7.800E+06 6.210E+06 .86 72.0 2.191E+07 93.7 .0 82.1 82.1 1.100E+08 Trn A 7.800E+06 6.210E+06 .86 Stop - Program terminated.

NMP-ES-039- F02 E2 - 62 I\IMP-ES-039-001

Vogtle Electric Generating Plant - Units 1 and 2 Response to NRC Request for Additional Information for License Amendment Request to Revise Technical Specification 3.7.9 Ultimate Heat Sink (UHS)

Enclosure 3 New TS Figure 3.7.9-1

UHS 3.7.9 90 T--------,---------,--------.--------.--------.--------~

U.

j I

i unacceplable Operation

~85 -*~--------+---------+---------r--------~-------+------~

I i to -,

Ql a.

t - - - - - - - - i - - - - - - I

~

I Four Fans/Spray Cells I,,

c 0

E Ql f

Required Per Train Ii :;:::>

....co I-

f! 75

-I

-y I I,, ,i Ir 0

Q) 0...

J i I m

Ql s:

I 1

-j I

I I

,i I .....

.n Q) co 0...

I I I i______

i Q)

~ 70 !i

..c ! -,; -t-- u U

co

~

J

-1

,i II Three Fans/Spray Cells i

! c

..2 -1 !

i

<l: Required Per Train i

.0 i

I

~

1 65 ; --i

! I i 1 1 1 -

, , , , I ~;-, J j

60 1 ...,..--t--;-

, , .,.--,-.!----,-.---r-

-.--+1--.,-,--

65 70 75 80 85 90 95 Initial Basin Temperature (Oeg. F)

Figure 3.7.9-1 Required Number of Fans/Spray Cells Vogtle Units 1 and 2 3.7.9-4 Amendment No. (Unit 1)

Amendment No. (Unit 2)

ML12354A463

Text

Enclosures:

Title:

Subject:

SUMMARY

3.0 REFERENCES

6.0 CONCLUSION

6.0 REFERENCES

SUMMARY

6.0 REFERENCES

SUMMARY

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