Text

Enclosure a - QDC-7500-M-2341, Revision 0, Quad Cities Units 1 & 2 Secondary Containment Drawdown Analysis
	ML19064B370
Person / Time
Site:	Quad Cities
Issue date:	03/05/2019
From:	Jason Wright; Exelon Generation Co
To:	; Office of Nuclear Reactor Regulation
Shared Package
ML19064B368	List: ML19064B369; ML19064B370; RS-19-023, Enclosure B - QDC-0000-N-1481, Revision 3, Quad Cities Units 1 & 2 Post-LOCA Eab, LPZ, and CR Dose - AST Analysis;
References
	RS-19-023 QDC-7500-M-2341, Rev 0
	Download: ML19064B370 (153)
	v • d • e

Enclosure A QDC-7500-M-2341, Revision 0 Quad Cities Units 1 & 2 Secondary Containment Drawdown Analysis

Design Analysis ATTACHMENT 1 CC-AA-309-1001 Revision 9 es1gn a1ys1s over ee D

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Title:

0 Quad Cities Units 1 & 2 Secondary Containment Orawdown Analysis EC No.:

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Discipline:

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Safety-Related System Code: "

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NIA CONTROLLED DOCUMENT REFERENCES,.

Document No.:

Fromrro Document No.:

Fromrro See Section 4 Is this Design Analysis Safeguards Information?,.

YesO No 181 If yes, see SY-AA-101-106 Does this Design Analysis contain Unverified Assumptions? "

Yes O No t8]

If yes, ATl/AR#:

This Design Analysis SUPERCEDES: 10 in its entirety.

Description of Revision {list changed pages when all pages of original analysis were not changed):,.

lni-+ic..I lss IA e, rm. t/'i/17 Preparer: '° John Wright (ENERCON)

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Detailed Review 181 Alternate Calc1Wations (attacheCl) D Testing 0 Reviewer: "

Guy Spikes (ENERCON)

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2/1/lc; PrlnlNarna Sign Name Cale Review Notes:.,

Independent review [8J Peer review D The document has been reviewed in its entirety and found to be acceptable. All recommended changes were discussed, accepted, and incorporated into the final document. The review was performed by the preparer's supervisor. The supervisor is the only technically qualified person available. The need to use the supervisor was approved by the supervisor's manager.

(F01 Extlmal Malyses Only)

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Jared Monroe (ENERCON) rJc 11711 n:~Name C/ I Ad~ 7~

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CC-AA-103-1003 Revision 13 Owner's Acceptance Review checklist for External Design Analysis Page 1 of 3 Design Analysis No.: QDC-7500-M-2341 Rev: _Q Contract#:

00597114 Release#: ---=o..... o..... 1 __ s1....__ __ _

No Question Instructions and Guidance 1

Do assumptions have All Assumptions should be stated in clear terms with enough sufficient documented justification to confirm that the assumption is conservative.

rationale?

For example, 1) the exact value of a particular parameter may not be known or that parameter may be known to vary over the range of conditions covered by the Calculation. It is appropriate to represent or bound the parameter with an assumed value. 2) The predicted performance of a specific piece of equipment in lieu of actual test data. It is appropriate to use the documented opinion/position of a recognized expert on that equipment to represent predicted equipment performance.

Consideration should also be given as to any qualification testing that may be needed to validate the Assumptions. Ask yourself, would you provide more justification if you were performing this analysis? If yes, the rationale is likely incomplete.

2 Are assumptions Ensure the documentation for source and rationale for the compatible with the assumption supports the way the plant is currently or will be way the plant is operated post change and they are not in conflict with any operated and with the design parameters. If the Analysis purpose is to establish a licensing basis?

new licensing basis, this question can be answered yes, if the assumption supports that new basis.

3 Do all unverified If there are unverified assumptions without a tracking assumptions have a mechanism indicated, then create the tracking item either tracking and closure through an ATI or a work order attached to the implementing mechanism in place?

WO. Due dates for these actions need to support verification prior to the analysis becoming operational or the resultant plant chani.:ie beini.:i op authorized.

4 Do the design inputs The origin of the input, or the source should be identified and have sufficient be readily retrievable within Exelon's documentation system.

rationale?

If not, then the source should be attached to the analysis. Ask yourself, would you provide more justification if you were performing this analysis? If yes, the rationale is likely incomplete.

5 Are design inputs The expectation is that an Exelon Engineer should be able to correct and reasonable clearly understand which input parameters are critical to the with critical parameters outcome of the analysis. That is, what is the impact of a identified, if change in the parameter to the results of the analysis? If the aooropriate?

impact is lari.:ie, then that parameter is critical.

6 Are design inputs Ensure the documentation for source and rationale for the compatible with the inputs supports the way the plant is currently or will be way the plant is operated post change and they are not in conflict with any operated and with the design parameters.

licensini.:i basis?

Yes I No I NIA

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~ D D CC-AA-103-1003 Revision 13 Owner's Acceptance Review checklist for External Design Analysis Page 2 of 3 Design Analysis No.: QDC-7500-M-2341 Rev: _Q No Question Instructions and Guidance Yes I No IN/A 7

Are Engineering See Section 2.13 in CC-AA-309 for the attributes that are

[3 D D Judgments clearly sufficient to justify Engineering Judgment. Ask yourself, documented and would you provide more justification if you were performing justified?

this analysis? If ves, the rationale is likely incomplete.

8 Are Engineering Ensure the justification for the engineering judgment B D 0 Judgments compatible supports the way the plant is currently or will be operated with the way the plant is post change and is not in conflict with any design operated and with the parameters. If the Analysis purpose is to establish a new licensing basis?

licensing basis, then this question can be answered yes, if the iudqment suooorts that new basis.

9 Do the results and Why was the analysis being performed? Does the stated

@ u 0 conclusions satisfy the purpose match the expectation from Exelon on the proposed purpose and objective of application of the results? If yes, then the analysis meets the Desiqn Analysis?

the needs of the contract.

10 Are the results and Make sure that the results support the UFSAR defined

!&l D LJ conclusions compatible system design and operating conditions, or they support a with the way the plant is proposed change to those conditions. If the analysis operated and with the supports a change, are all of the other changing documents licensinq basis?

included on the cover sheet as impacted documents?

11 Have any limitations on Does the analysis support a temporary condition or 1!1:1 u 0 the use of the results procedure change? Make sure that any other documents been identified and needing to be updated are included and clearly delineated in transmitted to the the design analysis. Make sure that the cover sheet appropriate includes the other documents where the results of this ornan izations ?'

analysis provide the input.

12 Have margin impacts Make sure that the impacts to margin are clearly shown

~ D D been identified and within the body of the analysis. If the analysis results in documented reduced margins ensure that this has been appropriately appropriately for any dispositioned in the EC being used to issue the analysis.

negative impacts (Reference ER-AA-2007)?

13 Does the Design Are there sufficient documents included to support the

~ u LJ Analysis include the sources of input, and other reference material that is not applicable design basis readily retrievable in Exelon controlled Documents?

documentation?

14 Have all affected design Determine if sufficient searches have been performed to g

D D analyses been identify any related analyses that need to be revised along documented on the with the base analysis. It may be necessary to perform Affected Documents List some basic searches to validate this.

(AOL} for the associated Confiquration Chanqe?

15 Do the sources of inputs Compare any referenced codes and standards to the current B u D and analysis design basis and ensure that any differences are reconciled.

methodology used meet If the input sources or analysis methodology are based on committed technical and an out-of-date methodology or code, additional reconciliation regulatory may be required if the site has since committed to a more requirements?

recent code CC-AA-103-1003 Revision 13 Owner's Acceptance Review checklist for External Design Analysis Page 3of3 Design Analysis No.: QDC-7500-M-2341 Rev:..Q No 16 17

18.

Question Have vendor supporting technical documents and references (including GE DRFs) been reviewed when necessa ?

Instructions and Guidance Based on the risk assessment performed during the pre*job brief for the analysis (per HU-AA-1212), ensure that sufficient reviews of any supporting documents not provided with the final analysis are performed.

Do operational limits Ensure the Tech Specs, Operating Procedures, etc. contain support assumptions operational limits that support the analysis assumptions and and in uts?

in uts.

Yes I No IN/A

~D D

D D Create an SFMS entry as required by CC-AA-4008. SFMS Number:

G. i-f S S2..

Calculation No. QDC-7500-M-2341 Revision 0 Page 5 of 36 Table of Contents

1.

PURPOSE............................................................................................................................................... 6

2.

INPUTS.................................................................................................................................................. 6

3.

ASSUMPTIONS...................................................................................................................................... 7

4.

REFERENCES........................................................................................................................................ 12

5.

COMPUTER PROGRAMS...................................................................................................................... 14

6.

METHOD OF ANALYSIS........................................................................................................................ 14

7.

NUMERIC ANALYSIS............................................................................................................................ 18

8.

RESULTS.............................................................................................................................................. 28

9.

CONCLUSION....................................................................................................................................... 36

10.

ATTACHMENTS................................................................................................................................ 36 A. GOTHIC Model Schematic Diagram 1 page B. GOTHIC input File for Case 1 39 pages C. Calculation of GOTHIC Inputs 12 pages D. GOTHIC Results 40 pages E. Exelon TODI No. QDC-18-030, 12/17/2018 3 pages F. Drawdown Test Case 21 pages

Calculation No. QDC-7500-M-2341 Revision 0 Page 6 of 36

1. PURPOSE The purpose of this analysis is to determine the Reactor Building (RB) pressure response following a design basis loss of coolant accident (LOCA) with a coincident loss of offsite power (LOOP) at Quad Cities. The Reactor Building forms part of the Secondary Containment (SC). (Ref.

8.a) The Reactor Building is normally maintained at a slight negative gauge pressure by the Reactor Building Ventilation system. Following an accident, the Reactor Building Ventilation system isolates and the Standby Gas Treatment system (SBGTS) is initiated. The heatup of the Reactor Building after isolation causes the RB pressure to increase until the SBGTS capacity is sufficient to overcome the expansion of the RB air volume and subsequently reduce the RB pressure. If the RB pressure is positive with respect to the outside air pressure, then any leakage from the Reactor Building is out-leakage. NRC RG 1.183 Appendix A paragraph 4.2 (Ref.

1) states that leakage from Primary Containment is assumed to be released directly to the environment as a ground-level release during any period in which the Secondary Containment does not have a negative pressure as defined in the Technical Specifications. RG 1.183 also states that the effect of high wind speeds on the ability of the secondary containment to maintain a negative pressure should be evaluated on an individual case basis. RG 1.183 also states that ambient temperature used in these assessments should be conservative for the intended use, e.g. high temperatures if limiting. Therefore, RB pressures will be calculated for both summer and winter conditions to determine the most limiting conditions. RB pressures will also be calculated for calm conditions and at the maximum assumed wind speed. The time duration after the LOCA occurs that the RB/SC pressure, measured with respect to the external ambient pressure, is greater than Quad Cities Technical Specification (TS) value of -0.25 inwg, as defined by TS SR 3.6.4.1.3, is referred to as the drawdown time in this analysis.

2. INPUTS

1. The Reactor Building geometry and heat loads are specified in Exelon calculation QDC-0020-M-0551. (Ref. 2) The Reactor Building volumes, wall dimensions, opening areas, and post LOCA heat loads are listed in Appendix A and Tables D2, D4, F1 and I4 of Ref. 2.

2. One SBGTS subsystem can maintain the Secondary Containment at a minimum vacuum pressure of 0.25 inwg with a maximum SBGTS flow rate of 4000 cfm under calm wind conditions. (Refs. 6.c, 6.e, 8.a, 9,)

3. The maximum SBGTS pressure drop is 13.2 inwg at a flow rate of 4000 cfm. (Ref. 5)

4. The SBGTS fan capacity is 4300 cfm at a static pressure of 15.8 inwg. (Ref. 5)

5. The primary SBGT subsystem is initiated on a SC isolation signal after a LOCA. (Refs. 6.e, 8.a, 8.b, 12)

6. The failure of the primary SBGT subsystem to start within 25 seconds will initiate the automatic start and alignment of the standby SBGTS subsystem. (Ref. 6.e, 12)

7. The two normally closed SBGTS isolation valves in each subsystem (1/2-7505A/B and 1/2 7507A/B) have a maximum opening time of less than 69 seconds. (Refs. 13, 17)

Calculation No. QDC-7500-M-2341 Revision 0 Page 7 of 36

8. The SBGTS inlet bells are located at an elevation of 67010, 44 above the floor elevation of 6666 (Ref. 18, 19, 20, 21) and the discharge of the 310 ft SBGTS exhaust stack is located at an elevation of 905 0. (Refs. 8.a, 16)

9. The RB ventilation fans trip and RB ventilation isolation valves begin closing in both units immediately after a LOCA initiation signal, i.e. high drywell pressure, low reactor water level or high drywell radiation. (Refs. 8.a. 8.c, 8.e, 11, 39)

10. The maximum closing time of the normally open RB ventilation supply and exhaust SC isolation valves is 60 seconds. (Refs. 6.d, 7)

11. The RB ventilation supply intake louvers are located at an elevation of 65810 and the RB ventilation exhaust stack discharges at an elevation of 753 10 1/2. (Ref. 16, 24, 25) The unit 1 intake is located on the south side of the Reactor Building and the unit 2 intake on the north side.

3. ASSUMPTIONS

1. The outside air temperature is assumed to remain constant at the summer design temperature of 93 F during summer conditions and at -6 F during winter conditions. (Ref.

8.e) Per RG 1.183 (Ref. 1), the ambient temperature should be the 1-hour average value that is exceeded only 5% (for summer conditions) and 95% (for winter conditions) of the total number of hours in the data set. The assumed temperatures conservatively bound the summer 1% and winter 99% values of 90 F and -3 F, respectively, for the Quad Cities area (i.e. Moline, Illinois) from Reference 33 Chapter 26 Tables 1A and 1B.

2. The outside air relative humidity is 0%, which results in the highest air density at a given temperature. (Ref. 33 Chapter 6 Table 2) This will conservatively provide the maximum mass of air in-leakage into the Reactor Building and will result in the highest wind pressures.

3. The outside air pressure is 14.7 psia at the Quad Cities RB ground floor elevation of 595 ft.

(Ref. 15.c)

4. The initial temperature of the Reactor Building is maintained at the normal RB design conditions of 104 F during summer conditions and 65 F during winter conditions. (Ref. 8.e,

14)

5. The initial relative humidity in the Reactor Building is at the maximum of 90% during normal conditions. (Ref. 14) This is the lowest air density at a given temperature, (Ref. 33 Chapter 6 Table 2) which will result in the fastest room heat-up rates and minimum mass of air removed from the Reactor Building during SBGTS operation.

6. All the equipment hatches in the Reactor Building floors from the Mezzanine level up the Reactor level are assumed to be open, consistent with Appendix F of Reference 2. The equipment hatches in the Refueling floor are also assumed to be open in this analysis. The hatch in the Refueling floor at the 690 6 elevation is normally open and only closed/tarped

Calculation No. QDC-7500-M-2341 Revision 0 Page 8 of 36 during an outage. (Ref. 39, Attachment E) Therefore, both of these hatches will be open since both units are assumed to be in normal operation prior to the LOCA. (Assumption 19)

7. A door is open between Units 1 and 2 on the Ground floor and on the Mezzanine level, consistent with Appendix F of Reference 2 and Attachment E. (Ref. 39)

8. The area of stairwells between RB levels and other penetrations between levels and units will be conservatively neglected in calculating the Reactor Building flow areas to maximize the pressure difference between RB volumes. This will maximize the pressures in RB volumes away from the SBGTS inlet.

9. Each of the RB openings is assumed to have a loss coefficient of 2.85 to maximize the pressure difference between volumes. This corresponds to the maximum loss coefficient for a wall opening per Diagram 4-18 of Ref. 36. Friction losses in the RB internal flow paths are negligible compared to the assumed loss coefficient.

10. Heat transfer from external Reactor Building walls to adjacent areas and to the external environment will be conservatively neglected, other than heat transfer from the Main Steam Tunnel and from the refueling floor walls and roof to the outside air. Although the Diesel Generator (DG) Room temperature from Table 2 of Ref. 2 is higher than the Reactor Building temperature, heat transfer from this room would be offset by heat losses to other adjacent areas due to the relatively small surface area of the DG Room wall. (Ref. 2 Appendix A and Table D-2) However, heat transfer from the Reactor Building to the internal surfaces of the exterior walls will be included, but with an insulated (adiabatic) boundary condition on the outer surface to prevent heat transfer from this surface to the adjacent areas.

11. Heat transfer to internal RB walls, other than the walls to the drywell (DW), spent fuel pool (SFP), floors between elevations and internal walls between the two units, will be conservatively neglected.

12. Suppression Pool (SP) and DW temperatures of 98 F and 150 F, respectively, will be assumed constant for the non-LOCA unit and as initial conditions for the LOCA unit for both summer and winter conditions. These correspond to the maximum initial temperatures used in the Reference 3 containment analysis and conservatively bound the TS limits for DW and SP temperature. (Ref. 6.a, 6.b)

13. The LOCA unit DW temperature is assumed to increase immediately to a constant temperature of 294 F after the LOCA occurs, which is consistent with the peak LOCA DW temperature from Reference 14 and bounds the LOCA DW temperatures from the Reference 3 containment analysis.

14. The bounding LOCA SP temperature profile for EPU conditions from the Reference 3 containment analysis will be conservatively used for the LOCA unit for both summer and winter conditions. This conservatively assumes LOCA/LOOP conditions and maximum initial and cooling water temperatures.

Calculation No. QDC-7500-M-2341 Revision 0 Page 9 of 36

15. The compressive effect of primary containment expansion on the secondary containment pressurization is negligible.

16. A constant SFP temperature of 125 F will be assumed for both the LOCA and non-LOCA units consistent with Ref. 2. The SFP temperature is normally maintained below 125 F during normal operation. (Ref. 8.d, 10, 39)

17. The effects of solar heat gain on the RB roof is accounted for by assuming constant sol-air temperatures of 129 F and 30 F on the outer surface of the roof for summer and winter conditions, respectively. There values were obtained by adjusting the maximum sol-air temperature of 127 F from Ref. 2 Table G1, calculated using a maximum outdoor air temperature of 91 F, to the assumed summer and winter outdoor air temperatures of 93 and -6 F, respectively, from Assumption 1. This is conservative since the sol-air temperature varies with time and is lower than the maximum value during most of the day.

This is also conservative for winter conditions since the assumed value implicitly assumes the same solar heat gain as was used for summer conditions.

18. Unit 2 is assumed to be the LOCA unit and Unit 1 is the non-LOCA unit for consistency with Reference 2. However, the units are similar in geometry and equipment configuration so the results are applicable to either unit.

19. The heat loads are conservatively based on no concurrent LOOP with Unit 1 remaining in normal operation immediately after the LOCA. This will maximize the heat loads in the Reactor Building and is consistent with the Reference 2 heat loads.

20. Decaying heat loads in the RWCU rooms and from the Main Steam Tunnel are conservatively assumed constant after LOCA occurs.

21. Heat loads from insulated ECCS pipes will be conservatively modeled as uninsulated pipes.

22. ECCS pump room cooler heat removal capacities are consistent with Table 4 of Reference 2.

These represent the individual cooler capacities in each of the pump rooms in the RB basement, i.e. two RHR pump room coolers, two CS pump room coolers and one HPCI pump room cooler, consistent with Appendix A of Ref. 2. Because they are based on non-winter conditions, these cooler capacities are conservative for winter conditions since the cooling water temperature supplied to the coolers will be lower, increasing the cooler heat removal capacity at a given room temperature. No credit for room cooler heat removal will be conservatively assumed for room temperatures below 104 F, the minimum temperature listed in Table 4 of Ref. 2. The cooler heat removal is also conservatively assumed to be constant for room temperatures above 150 F, the maximum temperature listed in Table 4 of Ref. 2.

23. The total heat removal of the ECCS pump room coolers in the RB basement of the LOCA unit is equal to the heat removal of two RHR pump room coolers and two CS pump room coolers.

There could be fewer ECCS pump room coolers operating for a LOOP scenario with a single failure of one DG. However, heat loads with no concurrent LOOP are used to maximize the RB heat loads per Assumption 19. Furthermore, the heat loads in the pump rooms would

Calculation No. QDC-7500-M-2341 Revision 0 Page 10 of 36 also be lower with the failure of a DG since fewer ECCS pumps would be operating. The heat removal by the HPCI room cooler will be conservatively neglected since HPCI will not be operational for the assumed scenario per Ref. 2 resulting in a lower HPCI room heat loads and temperatures and correspondingly lower heat removal by the HPCI room cooler. No credit is assumed for heat removal by the pump coolers in the non-LOCA unit.

24. The total Reactor Building in-leakage is based on one air change of the RB volume per day at a 0.25 inwg vacuum RB pressure. (Ref. 38)

25. All RB in-leakage is assumed to be on the refueling floor elevation consistent with Ref. 2 and the leakage is assumed to be distributed on each side of the Reactor Building based on the wall surface area. This is a reasonable assumption since the Reactor Building is concrete from the basement up to the 690 6 Refueling floor elevation while the refueling floor walls are constructed of insulated metal siding. (Ref. 2) The refueling floor roof and railroad airlock doors are other potential leakage locations. (Ref. 39, Attachment E) However, the assumed leakage locations have a relatively minor effect on the drawdown time since Reactor Building is relatively open and the drawdown time is dominated by the total in-leakage rate and not the assumed leakage location.

26. No credit is assumed for secondary containment out-leakage. (Ref. 38)

27. A maximum wind speed of 24 mph will be assumed for the analysis. Per RG 1.183 (Ref. 1),

the wind speed to be assumed is the 1-hour average value that is exceeded only 5% of the total number of hours in the data set. From the wind data in Attachment E of Ref. 37, a wind speed of 24 mph is exceeded less than 5% of the time at elevations of 33 ft and 196 ft, which bound the height of the Reactor Building. The assumed wind speed is conservative compared to the 5% wind speed of 20 mph for Moline, Illinois from Reference 33.

28. The wind will be assumed to be from the east. This will result in the highest RB pressurization due to wind effects since the wind pressures will be highest on the RB wall with the largest exposed surface area. Therefore, an east or west wind will introduce higher leakage rates than a north or south wind since the east and west walls are longer than the north and south walls.

29. A 40 second delay will be conservatively assumed for loading the primary SBGTS fan onto the diesel generator (DG) bus after the LOCA occurs. (Ref. 6.e Bases, 6.f Bases, 8.f, 39) This conservatively assumes LOOP conditions for starting the SBGTS system while no LOOP conditions are conservatively assumed for the RB heat loads per Assumption 19.

30. The primary SBGTS fan fails to start after the LOCA and the standby SBGTS fan starts after a 25 second time delay. (Inputs 5 and 6) The primary SBGTS subsystem is assumed to be located in Unit 2 since this is the assumed LOCA unit.

31. The SBGTS isolation valves in the standby unit start to open immediately after the standby fan starts and are fully open at the end of the maximum stroke time of 69 seconds. (Input 7)

Calculation No. QDC-7500-M-2341 Revision 0 Page 11 of 36

32. The SBGTS system flow rate is controlled to a maximum of 4000 cfm by the flow control valve located on the SBGTS fan inlet. (Ref. 8.a, 17)

33. The static head delivered by the SBGTS fan is constant at flow rates below the maximum flow rate of 4000 cfm. This will conservatively result in lower SBGTS flow rates during opening of the SBGTS isolation valves since the static head of the SBGTS fan is higher at flow rates below 4000 cfm. (Ref. 5)

34. The RB building pressure has a negligible effect on the SBGTS flow rate. This is conservative during RB pressurization after the LOCA since positive RB pressures will tend to decrease the static head required by the fan and increase the SBGTS flow rates. The negative RB pressures developed after the period of RB pressurization are small compared to the static head delivered by the SBGTS fan and will therefore have a negligible effect on the SBGTS flow rate. This assumption is only used for calculating the SBGTS flow rates during opening of the SBGTS isolation valves since the flow rate is normally controlled to a maximum of 4000 per Assumption 33.

35. Two RB ventilation supply and exhaust fans are operating in each unit prior to the LOCA.

(Refs. 22, 23)

36. The RB ventilation supply and exhaust fan flow rates are equal to the flow rates of 47,500 and 52,250 cfm, respectively, from References 22 and 23. The RB ventilation supply and exhaust fans have a rated pressure of 8 inwg at flow rates of 50,000 and 55,000 cfm, respectively. (Attachment E, Ref. 39) However, using the slightly lower RB ventilation flow rates will conservatively result in larger RB ventilation system loss coefficients.

37. The normal RB ventilation flow rates supplied to and exhausted from each elevation of the Reactor Building are as shown on References 22 and 23.

38. The initial RB/SC pressure prior to the LOCA is at the vacuum pressure of 0.1 inwg vacuum maintained by the RB ventilation systems during normal operation. (Ref. 6.c, 8.a, 8.e, 11)

This is the average negative internal RB pressure measured by four differential pressure sensors located at the refueling floor elevation. (Ref. 30)

39. The SBGTS isolation valve position during opening is linear with time, which is reasonable for the stroke of a motor operated valve.

40. A linear flow characteristic is conservatively assumed for the RB ventilation isolation valves.

This will conservatively allow more flow through the valve during closure than would the actual flow characteristics of a butterfly valve.

41. There are no backdraft dampers on the RB ventilation supply and exhaust fans. (Refs. 22, 23, 39, Attachment E) However, flow control dampers on the fans could change position due to the RB pressure changes after the LOCA (Ref. 22, 23, 30) Therefore, no flow out of the Reactor Building through the RB ventilation system will be credited after the LOCA to maximize the RB pressures.

Calculation No. QDC-7500-M-2341 Revision 0 Page 12 of 36

4. REFERENCES

1. NRC Regulatory Guide 1.183, Alternative Radiological Source Terms for Evaluating Design Basis Accidents at Nuclear Power Reactors, July 2000.

2. Exelon calculation QDC-0020-M-0551, "Reactor Building Post-LOCA Temperature Analysis",

Rev. 0B.

3. General Electric Project Task Report GE-NE-A22-00103-08-01, Dresden and Quad Cities Extended Power Uprate Evaluation, Task T0400, Containment System Response, Rev. 1.

4. General Electric Project Task Report GE-NE-A22-00103-55-01, Dresden and Quad Cities Extended Power Uprate Evaluation, Task T0610, Power-Dependent HVAC, Rev. 1A.

5. Sargent and Lundy calculation VG-3, SGTS P Fan & Filter Evaluation Calc., Rev. 0.

6. Quad Cities Technical Specifications and Bases, through Amendment 270/265.

a. 3.6.1.5 Drywell Air Temperature

b. 3.6.2.1 Suppression Pool Average Temperature

c. 3.6.4.1 Secondary Containment

d. 3.6.4.2 Secondary Containment Isolation Valves

e. 3.6.4.3 Standby Gas Treatment (SBGTS) System

f.

3.8.1 AC Sources - Operating

7. Quad Cities Technical Requirements Manual (TRM) Table B-1, Secondary Containment Isolation Valves, Rev. 0.

8. Quad Cities Updated Final Safety Analysis Report (UFSAR), Rev. 14.

a. Section 6.2.3, Secondary Containment Functional Design

b. Section 6.5.3, Fission Product Control Systems

c. Section 7.3.3, Secondary Containment Isolation System

d. Section 9.1.3, Spent Fuel Pool Cooling and Cleanup System

e. Section 9.4.7, Reactor Building Ventilation System

f.

Section 8.3.1.6, Standby Emergency Diesel Generator System

9. Procedure QCOS 1600-54, Secondary Containment Capability Test, Rev. 1.

Calculation No. QDC-7500-M-2341 Revision 0 Page 13 of 36

10. Procedure QCOA 1900-2. Fuel Storage Pool High Temperature, Rev. 9.

11. Procedure QCOP 5750-02, Reactor Building Ventilation System, Rev. 27.

12. Procedure QCOA 7500-01, Standby Gas Treatment System Auto Start, Rev. 20.

13. Procedure QCOS 7500-06, SBGTS Power Operated Valve Test, Rev. 25.

14. Drawing M-4A, Environmental Zone Map Figures 1-5 and Notes and References, Sht. 1 Rev.

H, Sht. 2 Rev. J, Sht. 3 Rev. G, Sht. 4 Rev. G, Sht. 5 Rev. H, Sht. 6 Rev. E.

15. General Arrangement Floor Plan Drawings

a. Drawing M-3, Main Floor Plan, Rev. O.

b. Drawing M-4, Mezzanine Floor Plan, Rev. K.

c. Drawing M-5, Ground Floor Plan, Rev. AG.

d. Drawing M-6, Basement Floor Plan, Rev. D.

e. Drawing M-7, Reactor Floor Plan, Rev. C.

16. Drawing M-8, General Arrangement Section A-A and B-B, Rev. C.

17. Drawing M-44, Diagram of Standby Gas Treatment, Rev. AQ.

18. Drawing M-116, Reactor Building Piping Plan El. 666-6 E., Quad Cities Station Unit 1, Rev. J.

19. Drawing M-117, Reactor Building Piping Plan El. 666-6 E., Quad Cities Station Unit 2, Rev.

H.

20. Drawing M-138, Reactor Building Piping Upper Section A-A, Rev. G.

21. Drawing M-156, Reactor Building Piping Upper Section F-F, Rev. K.

22. Drawing M-371, Diagram of Unit 1 Reactor Building Vent and Drywell Air Conditioning, Rev.

BH.

23. Drawing M-373, Diagram of Unit 2 Reactor Building Vent and Drywell Air Conditioning, Rev.

BF.

24. Drawing M-380, Reactor and Turbine Bldg Vent Fan Rooms El 678-10 and 658-10, Rev. T.

25. Drawing M-381, Reactor and Turbine Bldg Vent Fan Rooms - Sections, Rev. K.

26. Drawing M-382, Reactor Building Ventilation Plans, EL 690-6 & 666-6, Rev. R.

27. Drawing M-383, Reactor Building Ventilation Plans, EL 647-6 & 623-0, Rev. AB.

Calculation No. QDC-7500-M-2341 Revision 0 Page 14 of 36

28. Drawing M-384, Reactor Building Ventilation Plans, EL 595-0 & 554-0, Rev. U.

29. Drawing M-385, Reactor Building Ventilation Sections, Rev. N.

30. Drawing M-1531, Flow Diagram and Pneumatic Control Reactor Building Ventilation System and Drywell Torus Purge Control, Rev. AO.

31. GOTHIC Thermal Hydraulic Analysis Package User Manual, Version 8.2(QA), October 2016.

32. GOTHIC Thermal Hydraulic Analysis Package Technical Manual, Version 8.2(QA), October 2016.

33. Fundamentals Handbook, ASHRAE, 1997.

34. HVAC Applications Handbook, ASHRAE, 1999.

35. HVAC Duct System Design, SMACNA, 1981 - Second Edition.

36. Handbook of Hydraulic Resistance, Idelchik, 3rd Edition.

37. Exelon calculation QDC-0000-M-1408, Atmospheric Dispersion Factors (X/Qs) for Accident Releases, Rev. 2.

38. Standard Review Plan (SRP) 6.2.3, Secondary Containment Functional Design, from NUREG-0800: Standard Review Plan for the Review of Safety Analysis Reports for Nuclear Power Plants: LWR Edition, Revision 3, March 2007.

39. Exelon Transmittal of Design Information (TODI) No. QDC-18-030, Input Parameters for Quad Cities Units 1 & 2 Secondary Containment Drawdown Analysis, 12/17/2018.

5. COMPUTER PROGRAMS GOTHIC version 8.2 (Ref. 31, 32) is used to calculate the Reactor Building temperature and pressure response for the assumed scenario. GOTHIC error notices pertaining to version 8.2 were reviewed and none were identified which are applicable to the model used in this analysis.

6. METHOD OF ANALYSIS The Quad Cities post LOCA Reactor Building heatup model from Reference 2 was used as the basis for the Reactor Building geometry and heat loads. The Reactor Building geometry and heat loads from Reference 2 were consolidated to use fewer volumes and fewer corresponding inputs. These were then used to construct a corresponding GOTHIC model with control volumes, internal RB flow paths, thermal conductors, heaters and coolers. Inputs were updated for EPU conditions and to match the inputs and assumptions used in this calculation. Volumes, boundary conditions, flow paths, and fan and valve components were then added to the GOTHIC model to simulate the SBGTS system, RB ventilation system, Reactor Building leakage and SFP evaporation necessary to model the building pressure response after a LOCA.

Attachment A shows a schematic of the GOTHIC model used in this analysis. GOTHIC thermal

Calculation No. QDC-7500-M-2341 Revision 0 Page 15 of 36 conductors are not shown on this schematic for clarity. The following sections discuss the modeling approach and Section 7 develops the inputs that are used in the GOTHIC model.

Four cases were analyzed with the GOTHIC model to envelope the assumed environmental conditions: 1 - summer with no wind, 2 - summer with wind, 3 - winter with no wind, and 4 -

winter with wind. (Attachment B shows the GOTHIC input file for Case 1.) The following sequence of major events is postulated for this calculation:

1. The units are both in normal operation with the RB ventilation system maintaining the specified RB vacuum pressure.

2. A DBA LOCA is assumed to occur with a concurrent LOOP.

3. The secondary containment is isolated by closing the RB ventilation system isolation valves and the RB ventilation system fans are tripped.

4. The diesel generators start and the primary SBGTS fan is loaded onto DG bus at 40 seconds after the LOCA occurs.

5. The primary SBGTS fan fails to start after being loaded onto the DG bus and the standby SBGTS fan starts and the isolation valves begin to open after a 25 second time delay.

6. The SBGTS system flow rate is controlled to a maximum of 4000 cfm after the SBGTS isolation valves open.

RB Control Volumes The Reactor Building GOTHIC model is divided into eleven (11) GOTHIC control volumes, one for each level in each unit from the basement up to the Reactor level and a combined volume for the Refueling floor since this is common to both units. (CV# 1-11 in Attachment A) The volume for each control volume consists of the volume for each of the rooms on the corresponding level from Ref. 2. The height of each control volume below the refueling floor is calculated as the elevation difference between levels and the height of the refueling floor is calculating using the RB roof elevation. The hydraulic diameter of each control volume is calculated using Eqn. 11.1 of Ref. 31.

RB Flow Paths Each of the GOTHIC control volumes are connected by flow paths to model the flow between levels and between the two units. (FP# 1-14 in Attachment A) The dimensions and flow areas used for each of the flow paths are from Reference 2. To provide greater model flexibility for evaluating future changes, flow paths are also included in the model for some RB openings that are normally closed per Reference 2. A very small flow area is used for these closed flow paths to prevent flow though the opening. The hydraulic diameter for each flow path is calculated using Eqn. 12.1 of Ref. 31. The center to center distance between connecting control volumes is

Calculation No. QDC-7500-M-2341 Revision 0 Page 16 of 36 used as the inertia length, consistent with guidance provide in Ref. 31. A loss coefficient of 2.85 is used for each RB flow path per assumption 9.

RB Thermal Conductors GOTHIC thermal conductors (TC) were used to model heat transfer to the RB walls. The common RB wall areas from Reference 2 between identical areas were combined to reduce the number of thermal conductors in the GOTHIC model. Internal RB walls, other than the walls to the drywell (DW), spent fuel pool (SFP) and internal walls between the two units, were conservatively neglected per Assumption 11. Heat transfer from the Reactor Building to adjacent areas and to the outside air, other than the Refueling floor walls and roof, was conservatively neglected by modeling the outer surface of these walls as an insulated boundary condition. (Assumption 10) Thermal conductors for the suppression pool and ECCS pipes were also included in the LOCA unit to model the heat transfer from these surfaces to the Reactor Building. (TC # 36-40 in Attachment B)

RB Heat Loads GOTHIC heaters are used to represent the electrical and mechanical heat loads in the Reactor Building. A single GOTHIC heater component is used in each of the RB control volumes.

(Heater# 1H-11H in Attachment A) The total heat load for each control volume consists of the heat load from each of the rooms on the corresponding level. The total heat loads from Table I4 of Reference 2 are used for each area. A GOTHIC trip is used to turn the heaters on when the LOCA occurs.

RB Coolers A single GOTHIC cooler is used in the basement control volume of the LOCA unit to represent the total heat removal of the ECCS pump room coolers in this unit. (Cooler# 12C in Attachment A) The heat removal of the cooler component is specified as a function of the torus area control volume temperature by use of a GOTHIC function. A GOTHIC trip is used to turn the cooler on when the LOCA occurs.

External Environment Five GOTHIC control volumes connected to boundary conditions with flow paths are used to represent the external environment: one on each face of the Reactor Building and one for the exhaust of the SBGT and RB ventilation systems. (BC# 1P, 2F, 3P, 4F, 5P, 6F, 9P, 10F, 11P, 12F, CV# 12-14 and 19-20, and FP# 21-26 and 59-62 in Attachment A) Separate environmental control volumes are used since the external pressure varies based on the assumed wind direction due to the different building pressure coefficients on each surface of the Reactor Building. The pressure used for the boundary condition is calculated as a function of the wind speed and the temperature and relative humidity are set equal to the assumed summer conditions of 93 F with 0% humidity or the assumed winter conditions of -6 F with 0%

humidity. (Assumptions 1 and 2)

Calculation No. QDC-7500-M-2341 Revision 0 Page 17 of 36 RB Leakage Four flow paths, one on each wall of the refueling floor are used for the RB leakage and to measure the differential pressures between the RB refueling floor and the external environment. (FP# 57, 58, 63, 64 in Attachment A) The total leakage area for the RB leakage flow paths is calculated based on based on one air change of the RB volume per day and is distributed among the four leakage flow paths on the refueling floor. (Assumptions 24 and 25)

Additional flow paths, with no leakage, are used to determine the differential pressure between the Unit 2 RB levels below the refueling floor and the external environment. (FP# 65-69 in Attachment A) GOTHIC control variables are used to convert the differential pressure across the leakage paths from units of psi to inwg and to calculate the average RB pressure differential on the refueling floor.

SBGTS Two GOTHIC flow paths connected from the reactor floor control volumes in each unit to the external environment control volume for the exhaust stacks are used to represent each of the two SBGTS trains. (FP# 15 and 16 in Attachment A) The loss coefficient for these flow paths is calculated using the pressure loss across the SBGTS system from Ref. 5. A GOTHIC constant volume fan is used in each flow path to represent the SBGTS exhaust flow. (Fan# 1Q and 2Q in Attachment A) The flow rate of the failed primary SBGTS fan (Assumption 30) is set equal to zero. The flow rate thru the standby SBGTS fan is calculated using the SBGTS system resistance as a function of time during opening of the isolation valves but is limited to the maximum SBGTS flow rate of 4000 cfm. (Assumption 32) A GOTHIC function is used to apply this time dependent flow rate to the standby SBGTS fan component.

RB Ventilation System Four GOTHIC control volumes (CV# 15-18 in Attachment A) are used to represent the RB ventilation supply and exhaust ducts for each unit that are located outside of the Reactor Building. (Ref. 22, 23, 24, 25) These RB ventilation system control volumes are connected with GOTHIC flow paths (FP# 31-54 in Attachment A) to the control volumes for each level of the Reactor Building in the respective unit. (Note: Part of the multiple exhaust flow paths from the RB levels to the RB ventilation system exhaust control volumes are shown as a single line on the GOTHIC model schematic in Attachment A due to space limitations.) Each of the RB ventilation supply and exhaust control volumes are also connected to the corresponding ambient air control volumes with two flow paths. (FP# 17-20, 27-30 in Attachment A) A constant volume fan component representing the RB ventilation supply or exhaust fans is used on one of these flow paths. (Fan# 3Q-6Q in Attachment A) A valve component representing the RB ventilation supply or exhaust isolation valves is used on the second of these flow paths. (Valve# 1V-4V in Attachment A) (Note: Two flow paths are necessary between the each of the RB ventilation system and outside air control volumes since the flow rate in the fan flow path is forced to zero by the constant volume fan component during isolation valve closure.) The flow rate of the RB exhaust fan components is controlled with GOTHIC trips to maintain the assumed average initial RB pressure on the Refueling floor. GOTHIC trips are also used to trip the RB supply and exhaust fan components when the LOCA occurs. The position of the RB supply and exhaust isolation valve components is controlled via the use of a GOTHIC function.

Calculation No. QDC-7500-M-2341 Revision 0 Page 18 of 36 SFP Evaporation SFP evaporation was modeled by adding flow boundary conditions for the SFP evaporation rate from the SFP in each unit. (BC# 7F and 8F in Attachment A) These flow boundary conditions were connected to the refueling floor control volume with GOTHIC flow paths. (FP# 55 and 56 in Attachment A) The SFP evaporation rate was determined using an ASHRAE equation for pool evaporation. Internal thermal conductors connected to the refueling floor elevation were also used to model the natural convection heat transfer from the fuel pool surface. (TC# 52 and 53 in Attachment B)

Time Domains Three time domains were specified for the solution. The first two time domains are used to stabilize initial conditions before the LOCA occurs. The first time domain before the LOCA was used to initialize the room pressures and the second was used to initialize the conductor temperatures. The third time domain is used to represent the time after the postulated LOCA occurs.

GOTHIC trips and functions are used in the model to control the time dependent aspects of the model. During the first two initial time domains, GOTHIC trips and functions are used to maintain the Reactor Building at the assumed initial pressure, temperature and humidity.

During this time, the initial RB room and humidity temperature is used for the outside air temperature and humidity, heat transfer to the RB thermal conductors was set to zero and the RB volume heater components, ECCS room cooler components and SFP evaporation are turned off to maintain the assumed initial conditions. The initial RB pressure is maintained by cycling the RB ventilation exhaust fan components with GOTHIC trips to control the RB exhaust flow. A large value of the DT ratio is used for the second time domain to initialize the conductor temperatures. A short time increment is also used for the second time domain to prevent the room temperatures from changing due to heat transfer to or from the thermal conductors.

During third LOCA time domain, the outside air temperature and humidity is set equal to the assumed outdoor air conditions, heat transfer to the conductors and SFP evaporation is initialized and the RB volume heater and ECCS room cooler components were turned on.

7. NUMERIC ANALYSIS The calculations for the GOTHIC version 8.2 inputs are outlined in the following sections. Many of the calculations are performed in Attachment C and the GOTHIC input file is shown in Attachment B.

RB Control Volumes The results of the computations for each of the RB control volumes are shown in Table 1 of Attachment C. The volumes from Table D4 of Ref. 2 are used to calculate the volume of each RB control volume. The total volume of each control volume includes the volume for each of the rooms on the corresponding level in each unit. The heights of the control volumes are calculated using the elevation difference between levels. The height of the refueling floor control volume is calculating using a roof elevation of 7379. (Ref. 16) The hydraulic diameter

Calculation No. QDC-7500-M-2341 Revision 0 Page 19 of 36 of each control volume is calculated using Eqn. 11.1 of Ref. 31 using the total volume and the sum of the conductor wall surface areas for each control volume from Attachment C. The total wall surface area for each control volume used to calculate the hydraulic diameter also includes the floor area (i.e., the ceiling area of the elevation below) of each volume and the area of internal walls for each volume listed in Table 3 of Attachment C, even though these were not included as thermal conductors in the GOTHIC model, based on guidance on the use of Eqn. 11.1 from Ref. 31.

RB Flow Paths The dimensions and flow areas for each of the RB flow paths are from Table F1 of Reference 2.

The elevations of the flow paths are based on the corresponding floor elevations. A height of 7 ft is used for the height of the door openings between the two units. A height of 1 ft is used for the flow paths between elevations and the lower elevation is based on a floor thickness of 1 ft since this will have a negligible effect on the analysis. The flow areas and the results of the computations of the hydraulic diameter and hydraulic diameter for each of the RB flow paths are shown in Table 2 of Attachment C. Only the flow area of open equipment hatches between levels and open doors between units is credited consistent with assumptions 6 and 7. The flow areas for the closed flow paths (doors between units on the Main and Reactor levels) are set to a small value in GOTHIC to prevent flow through these flow paths. A loss coefficient of 2.85 is used for each of the RB flow paths per assumption 9 and the friction length is set equal to zero since the friction losses are negligible. The center to center distance between connecting control volumes is used as the RB flow path inertia length per Ref. 31. The volume heights from Table 1 of Attachment C are used to calculate the inertia lengths of the flow paths between elevations and the center to center distance between units (Ref. 15) is used for the flow paths between units. The hydraulic diameter of each flow path is calculated using Eqn. 12.1 of Ref. 31 using the opening dimensions from Table F1 of Reference 2. There are two 4 ft square hatch openings in the floor between the ground level and torus area of each unit that are credited in this analysis. Therefore, the area and wetted perimeter used to calculate the hydraulic diameter of these flow paths is twice that of a single hatch opening.

RB Thermal Conductors Table 3 of Attachment C shows the results of the computations for each of the RB GOTHIC thermal conductors. The surface area of each conductor is the sum of the common RB wall surfaces areas between identical areas from Appendix A of Reference 2. The minimum wall thickness of the common conductors was used to conservatively minimize the thermal mass of the walls. All of the external concrete walls to adjacent areas were combined into a single thermal conductor for each volume with a wall thickness of 1.5 ft, which bounds the thickness of the external walls. Internal RB walls, other than the walls to the drywell (DW), spent fuel pool (SFP) and internal walls between the two units, were conservatively neglected per Assumption

11. Thermal conductors for the suppression pool and ECCS pipes were also included in the LOCA unit control volumes. The PCFLUD model from Ref. 2 included a thermal conductor (#148) for the RWCU pipes in the LOCA unit to account for the decaying heat load from these hot pipes.

However, a thermal conductor for the RWCU pipes was not included in the GOTHIC model since this was accounted for by using a constant heat load for these pipes instead of a decaying heat load per Assumption 20. The thermal properties from Section 4.6 of Ref. 2 were used for each

Calculation No. QDC-7500-M-2341 Revision 0 Page 20 of 36 of the thermal conductors. The walls of the Refueling floor are 1 1/2 thick insulated metal siding per Section 4.2 of Ref. 2 and the RB roof consists of built up roofing over 1 of rigid insulation on 3.5 concrete roof slabs. A 1 thickness is used for the built-up roofing consistent with Appendix A of Ref. 2. The initial RB temperature is used for each of the thermal conductors. This is acceptable since an initial time period is used during the solution procedure to initialize the temperature profile in the thermal conductors prior to the LOCA as described in the Run Control section.

The heat transfer coefficients for the sides of RB thermal conductors exposed to the RB internal environment are calculated using the GOTHIC natural convection correlations and include the effect of radiation heat transfer to the secondary containment environment. As described in the Run Control section, heat transfer from these surfaces is prevented to maintain the assumed RB initial temperatures during the initial two time domains by specifying a zero heat transfer coefficient via use of a GOTHIC function. The assumed outside air and sol-air temperatures from assumptions 1 and 17 are used for the external surfaces of the refueling floor walls and floor, respectively. The outside surface of external concrete walls to adjacent areas below the refueling floor was conservatively modeled as an insulated boundary condition to prevent heat transfer to the adjacent areas. (Assumption 10) The assumed DW and SP temperatures are conservatively used as specified temperatures on the side of the respective thermal conductors exposed to the primary containment atmosphere. This implicitly assumes the most conservative, i.e. infinite, heat transfer coefficients between the conductor and the primary containment atmosphere. A specified temperature boundary condition is also used for the SFP thermal conductors. Constant DW temperatures of 150 F and 294 F are used for non-LOCA unit 1 and LOCA unit 2, respectively, and a constant SFP temperature of 125 F is used for both units per assumptions 12, 13 and 16. A constant SP temperature of 98 F is used for non-LOCA unit 1 and the time dependent SP temperatures from Tables 3-5 and 3-6 of Ref. 3 are used for LOCA unit 2 via a GOTHIC forcing function per Assumption 14.

RB Heat Loads Table 4 of Attachment C shows the results of the computation for each of the GOTHIC heaters used in each of the RB control volumes. The total heat load for each control volume consists of the heat load in each of the rooms on the corresponding level. The LOCA total heat loads from Table I4 of Reference 2 are used for the Unit 2 volumes and the non-LOCA heat loads are used for the Unit 1 volumes. An additional heat load of 193 W (0.2 BTU/s) is added to each control volume below the refueling floor to account for the Wi-Fi loads that were added in Rev. 0B of Ref. 2 since these are not included in the Table I4 heat loads from Rev. 0 of Ref. 2. The heat load for the heater component in the Refueling floor control volume is the sum of the refueling floor heat loads for both units. The non-LOCA heat load for the RWCU HX room on the 623 elevation is also conservatively used for the LOCA heat load for this room instead of modeling this as a decaying heat load, i.e. with a thermal conductor, per Assumption 20. A GOTHIC trip is used to turn the heater components on when the LOCA occurs.

RB Coolers Table 5 of Attachment C shows the results of the calculations for the total heat removal capacity of the GOTHIC cooler representing the ECCS pump room coolers in the basement of the LOCA

Calculation No. QDC-7500-M-2341 Revision 0 Page 21 of 36 unit. The total heat removal capability for the cooler component is the sum of two RHR and two CS pump room coolers capacities from Table 4 of Reference 2 per Assumption 22 and 23. The heat removal of the HPCI room cooler is conservatively neglected per assumption 23. A GOTHIC function is used to control the cooler heat removal capacity as a function of the room temperature of the LOCA unit basement control volume. The cooler capacity is zero for room temperatures below 104 F and constant for room temperatures above 150 F. (Assumption 22)

A GOTHIC trip is used to turn the ECCS cooler component on when the LOCA occurs.

RB Leakage From Table 1 of Attachment C, the total free volume of the Reactor Building is 3.472E6 ft3.

Therefore, the total RB in-leakage, based on based on one air change of the RB volume per day per Assumption 24, is:

= 3.4726 /

(24

)(60

)

= 2411 The total RB leakage area is calculated using Eqns. 9 and 29 from Chapter 32 of Ref. 33:

=

4005

= 2411 40052.85 0.25 = 2.033 Where:

A = leakage area, ft2 Q = flow rate = 2411 cfm P = pressure difference = 0.25 inwg (Assumption 24)

K = assumed loss coefficient = 2.85 (Assumption 9)

The RB leakage is calculated with the loss coefficient of 2.85 assumed for the RB openings.

(Assumption 9) However, the loss coefficient used to calculate the leakage is inconsequential if the leakage area is consistent with the loss coefficient used in the GOTHIC model since the leakage only depends on the ratio of the area to the loss coefficient. The leakage area is divided among the four walls on the refueling floor based on the area of each wall, i.e. the leakage area for the east and west wall of the refueling floor is 294/117.5 = 2.5 times that of the north and south walls since these walls span both units. (Ref. 15.e, Assumption 25) Therefore, leakage areas of 2.033/7 = 0.290 ft2 are used for the flow paths on the north and south walls and 2.033*2.5/7 = 0.726 ft2 for the flow paths on the east and west walls. The refueling floor elevation is used for the elevation of each flow path since this corresponds to the elevation of the four RB differential pressure sensors. (Ref. 30) A reverse loss coefficient of 2.85 is used for each flow path consistent with the assumed value used to calculate the leakage area. However, a large value is used for the forward loss coefficient of the leakage flow paths, i.e. the flow direction corresponding to out-leakage from the Reactor Building, to prevent out-leakage from the Reactor Building per Assumption 26. A friction length of zero is used for the leakage flow paths since the flow areas were calculated solely based on the assumed form coefficient of 2.85.

Calculation No. QDC-7500-M-2341 Revision 0 Page 22 of 36 Assumed values are used for the height of the flow path, the hydraulic diameter and the inertia length are inconsequential to the analysis. A small area is used for the flow paths used to measure the RB differential pressures below the refueling floor to prevent any flow in these flow paths.

External Environment A large volume was used for each of the five GOTHIC control volumes representing the external environment. The elevation of each was set equal to the RB ground level elevation of 595 ft and the height was set equal to 400 ft to bound the height of the SBGTS exhaust stack. The elevation of each environment boundary condition was also set equal to the RB ground level elevation of 595 ft. The temperature and relative humidity of the environment boundary conditions are controlled via the use of forcing functions. These are set equal to the assumed Reactor Building initial conditions prior to the LOCA to prevent RB temperature and humidity changes during the stabilization period prior to the LOCA. After the LOCA occurs, these values are set equal to the assumed outdoor air conditions for summer or winter conditions. A large value is used for the volumetric flow rate of the flow boundary conditions so that the conditions in the environment control volumes change rapidly to maintain the assumed outdoor air conditions. The pressure used for each of the environment control volumes is equal to the assumed atmospheric pressure plus the surface pressure on the RB surface corresponding to the boundary condition. The surface pressure is calculated as a function of the wind speed using Eqn. 3 from Chapter 15 and Eqn. 8 from Chapter 32 of Ref. 33:

1097

Where:

Ps = surface pressure difference = inwg Pv = velocity pressure = inwg Cp = pressure coefficient U = wind velocity = 24 mph*5280/60 = 2112 fpm (Assumption 27)

= air density = 0.0718 lb/ft3 at 93 F, 0 % RH summer conditions

= 0.0875 lb/ft3 at -6 F, 0% RH winter conditions (Assumptions 1 and 2, Ref. 33 Chapter 6 Table 2)

Ref. 33 defines Ps as the difference between the pressure on the building surface and the local outdoor atmospheric pressure at the same level in an undisturbed wind approaching the building. Therefore, the surface pressure difference Ps is converted from inwg to psi by dividing by the conversion factor of 27.7 (Ref. 33 Chapter 35 Table 2) and added to the atmospheric pressure of 14.7 psia (assumption 3) to give the pressure for each environment boundary condition. An east wind is assumed for this analysis to maximize RB pressurization effects due to the wind. (Assumption 28) Building pressure coefficients of 0.8 and -0.43 will be used for the upwind (east), and downwind (west) sides of the Reactor Building and a value of -0.4 will be used for the sides parallel to the wind (north and south). These represent the maximum and minimum pressures coefficients at the locations of the RB pressure sensors on the refueling floor elevation. (Ref. 33 Chapter 15 Figure 5) Table 6 of Attachment C calculates the wind

Calculation No. QDC-7500-M-2341 Revision 0 Page 23 of 36 pressures and corresponding atmospheric pressures used for each of the environment boundary conditions at both summer and winter conditions. The pressure for the exhaust stack environment boundary condition is set equal to the assumed atmospheric pressure of 14.7 psia since the exhaust stacks are located above the elevation of the Reactor Building and will not be influenced by building wind effects. Parameters were chosen for the flow paths connecting the environment control volumes to boundary conditions so that they do not influence the results of the analysis.

SBGTS The inlet elevation of each SBGTS flow path is set to the inlet bell elevation of 670.8 ft and the outlet elevation to the SGBTS exhaust stack elevation of 905 0 ft. (Ref. 8.a, 15) A height and hydraulic diameter of 2 ft and a flow area of 3.14 ft2 corresponding to the 2 ft diameter of the SBGTS isolation valves are used for the SBGTS flow paths. (Refs. 5, 17) The total pressure loss of the SBGTS system is 13.2 inwg at the rated flow of 4000 cfm. (Ref. 5) Therefore, the total SBGTS system resistance is calculated using Eqns. 9 and 29 from Chapter 32 of Ref. 33:

= 4005

= 4005 3.14 4000

13.2 = 130.6 Where:

K = SBGTS loss coefficient Q = SBGTS flow rate = 4000 cfm (Ref. 5)

A = SBGTS flow area = 3.14 ft2 based on 2 ft diameter duct size (Refs. 5, 17)

P = SBGTS pressure loss = 13.2 inwg (Ref. 5)

(Note: The SBGTS loss coefficient is calculated based on area of the isolation valves for consistency.) The above value is used for the forward loss coefficient of the SBGTS flow paths.

However, a large reverse loss coefficient is used for the SBGTS flow paths to prevent reverse flow in the flow path due to the backflow dampers on the SBGTS fan discharge. (Ref. 17) The friction length is set equal to zero since all of the pressure loss is accounted for the by the loss coefficient and an inertia length of 1 ft is used for these flow paths since it has no effect on the analysis results.

The flow rate of the failed primary SBGTS fan component is set equal to zero. (Assumption 30)

The flow rate of the standby SBGTS fan component is controlled using a GOTHIC function. The flow rate of the standby SBGTS fan is set equal to zero up until the time that the standby fan starts at 65 seconds after the LOCA, i.e. 40 seconds to load the primary SBGTS onto the DG and an additional 25 seconds for the standby SBGTS to start after the primary SBGTS is assumed to fail. (Assumptions 29 and 30) The flow rate after the subsequent 69 second SBGTS valve opening time is set equal to the maximum SBGTS flow rate of 4000 cfm. (Assumptions 31, 32)

The flow rate during opening of the SBGTS isolation valves is calculated using the total pressure losses across the SBGTS isolation valves and the rest of the SBGTS system. The SBGTS pressure loss is equal to the static pressure of the SBGTS fan. Therefore, the SBGTS flow rate during valve closure is calculated using the same equation as was used above to calculate the SBGTS loss

Calculation No. QDC-7500-M-2341 Revision 0 Page 24 of 36 coefficient but is rearranged to solve for the flow rate and setting the SBGTS pressure loss equal to the fan static pressure:

= 4005 Where:

Q = SBGTS flow rate, cfm P = SBGTS pressure loss = SBGTS fan static pressure

= 15.8 inwg (Ref. 5, Assumption 33)

K = total SBGTS loss coefficient = 130.2 + 2*Kv Kv = SBGTS valve loss coefficient = 0.19 (Ref. 5)

A = SBGTS flow area = 3.14 ft2 based on 2 ft diameter valve and duct size The total SBGTS loss coefficient is the sum of the loss coefficients for the two butterfly isolation valves and that for the remainder of the SBGTS system from the inlet bell to the exhaust stack.

The SBGTS isolation valves are 24 diameter butterfly valves with a fully open loss coefficient of 0.19. (Refs. 5, 17) Subtracting the loss coefficient of two fully open isolation butterfly valves (0.19 each) gives the loss coefficient of 130.2 for the remainder of the SBGTS system. The SBGTS flow rate as a function of time during valve closure is calculated in Table 7 of Attachment C. The valve loss coefficient as a function of valve position is from Table 6-14A of Ref. 35. The fan static pressure is conservatively assumed to remain constant and the valve position is linear with time over the 69 second opening time. (Assumptions 33, 39) The SBGTS flow calculated using this equation is limited to the maximum flow of 4000 cfm per Assumption 32. The SBGTS flow rate is fairly linear during opening of the isolation valves and reaches 4000 cfm at approximately 37 seconds after the isolation valves begins to open. Therefore, the SBGTS flow will be assumed to increases linearly from zero from the time that the standby SBGTS fan starts at 40 + 25 = 65 seconds after the LOCA until the time that the SBGTS flow reaches 4000 cfm at 40 + 25 + 37 =

102 seconds after the LOCA and remains constant at 4000 cfm after 102 seconds. This SBGTS flow rate is applied standby SBGTS fan component via a GOTHIC forcing function.

RB Ventilation System A volume of 1000 ft3 is used for each of the RB ventilation supply and exhaust control volumes to approximate the volume between the isolation valves and Reactor Building. (Refs. 24, 25)

(Note: The exact value used for this volume is not critical since it is negligible compared to the total RB volume.) The 65810 elevation of the fan rooms is used for the elevation of these control volumes and 6 ft is used for the height and hydraulic diameter, corresponding to the diameter of the RB ventilation isolation valves. (Ref. 24, 25) The inlet and exit elevations of the RB ventilation supply flow paths from the environment to the RB ventilation supply isolation valves is also set equal the inlet elevation of 65810. This value is also used for the inlet elevations of the RB ventilation exhaust flow paths to the environment from the RB ventilation exhaust isolation valves, but the exit elevation is set equal the stack outlet elevation of 753 10 1/2. A value of 6 ft is also used for the height and hydraulic diameter of all these flow paths and the flow area is set equal to a corresponding value of 28.3 ft2. The RB ventilation isolation valves

Calculation No. QDC-7500-M-2341 Revision 0 Page 25 of 36 are butterfly valves, which have a fully open loss coefficient of 0.19. (Ref. 5) Therefore, a value of 0.38, corresponding to two butterfly valves in series, is used for the forward loss coefficient of the supply valve flow paths and the reverse loss coefficient of the exhaust valve flow paths. A large value is used for the reverse flow coefficient of the supply valve flow paths and the forward loss coefficient of the exhaust valve flow paths to prevent flow out of the Reactor Building through these flow paths. (Assumption 41) The friction length for these flow paths is set equal to zero since all of the pressure loss is accounted for the by the loss coefficient.

The inlet elevation of each RB ventilation supply flow paths and outlet elevations of exhaust flow paths to the individual RB levels is set equal to the 65810 elevation of the RB ventilation supply and exhaust control volumes. The outlet elevation of the supply flow paths and outlet elevation of exhaust flow paths is set equal to the corresponding RB floor elevation. The ventilation supply and exhaust ducts in the Reactor Building have a wide variety of sizes and lengths. (Ref. 26, 27, 28) Therefore, an arbitrary height and hydraulic diameter of 1 ft and an area of 28.3 ft2, consistent with the isolation valve area, are used for these flow paths since these values are not critical to the analysis. The friction length for each of the flow paths is set equal to zero and the loss coefficients are calculated using the RB supply/exhaust fan static pressure and the flow rate supplied to the corresponding level during normal operation. (Ref.

22, 23) The pressure loss across each flow path during normal operation is the fan static pressure minus the pressure loss across the isolation valves. The pressure loss across the two RB supply isolation valves in series is calculated using Eqns. 9 and 29 from Chapter 32 of Ref. 33:

=

= 0.38

= 0.27 inwg Where:

P = pressure loss across supply isolation valves, inwg Kv = RB isolation valve loss coefficient = 0.38 for two butterfly valves in series Q = normal RB ventilation supply flow rate = 95,000 cfm (Ref. 22, 23)

A = valve area = 28.3 ft2 based on 6 ft diameter isolation valve size The corresponding pressure loss across the two RB exhaust isolation valves is 0.32 inwg at the exhaust flow rate 104,500 cfm with two RB exhaust fans in parallel. The pressure loss across two fully open isolation valves in series is subtracted from the fan static pressure to give the pressure loss in each of the supply and exhaust flow paths at the assumed flow rates. The corresponding pressure loss in each of the RB ventilation supply and exhaust flow paths is 7.73 and 7.67 inwg using the supply and exhaust fan static pressures of 8 inwg from Assumption 36.

The pressure loss for each of the supply and exhaust flow paths is calculated in in Table 8 of Attachment C using the approximate supply flow rates to each area from References 22 and 23.

The exhaust flow rates from each area are assumed to be identical to the supply flow rates.

However, the exhaust fan is sized for 9500 cfm of infiltration which results in the higher exhaust fan flow rate of 104,500 cfm. (Ref. 22, 23)

The flow rate for each of the RB ventilation fan components is set equal to the total flow rate of 95,000 cfm for two RB ventilation supply fans operating in parallel and 104,500 cfm for two RB ventilation exhaust fans operating in parallel up until the time of the LOCA and is set to zero

Calculation No. QDC-7500-M-2341 Revision 0 Page 26 of 36 thereafter using a GOTHIC trip. Trips are used for the control exhaust fan components to give an average initial RB internal pressure of 0.1 inwg vacuum prior to the LOCA. (Assumption 38)

The position of the RB ventilation isolation valve components is also specified as a function of time. The valves are initially closed (valve position of zero) up until the time that the LOCA occurs since the RB ventilation flows are being supplied by through the fan components. The valves are then immediately opened at the time of the LOCA. The valves position is then linear with time until the valves are closed at 60 seconds after the LOCA. (Assumption 39) A linear valve characteristic is used for the valve components used on RB ventilation flow paths.

(Assumption 40)

SFP Evaporation The evaporation rate from the SFP pool was calculated using Eqn. 1 from Chapter 4 of Ref. 34:

=

()(95 + 0.425) = 1353 1022.3 (3.96 0)(95 + 0.425 0)

= 497.9 /

Where:

WSFP = SFP evaporation rate, lb/hr A = SFP surface area = 33 x 41= 1353 ft2 (Ref. 2 Table D1) hfg = latent heat of evaporation at SFP temperature

= 1022.3 BTU/lb at 125 F (Table 3 Ref. 33 Chapter 6)

Pw = saturation vapor pressure at SFP temperature

= 3.96 inHg at 125 F (Table 3 Ref. 33 Chapter 6)

Pa = saturation pressure at room air dew point = 0 inHg (assumed 0% RH)

V = air velocity over water surface = 0 fpm with no forced air circulation after LOCA The SFP evaporation rate was conservatively calculated assuming zero humidity on the refueling floor, i.e. Pa = 0. The evaporation rate calculated above multiplied by an activity factor of 0.5 (Ref. 34 page 4.6) to account for the quiescent pool surface conditions and was converted to lb/s to give a flow rate of 0.07 lb/s for the GOTHIC flow boundary condition. The SFP temperature of 125 F and corresponding saturation pressure of 1.95 psia were also used for this boundary condition along with a steam volume fraction of 1.

The area of the thermal conductors added to model natural convection heat transfer from SFP to the refueling floor were set equal to the SFP surface area of 1353 ft2. The heat transfer coefficient for natural convection from a floor was used for one side of the conductor and the other side of the conductor was set equal to the specified SFP temperature of 125 F.

(Assumption 16) The conductor itself was modeled as a thin sheet of steel in order to minimize the temperature difference across the conductor and to minimize the thermal capacitance of the conductor.

Calculation No. QDC-7500-M-2341 Revision 0 Page 27 of 36 Initial Conditions The same initial conditions were used for all the control volumes used in the model. The initial temperature for each of the volume is 104 F for summer conditions and 65 F for winter conditions per assumption 4 and the initial relative humidity is 90% per assumption 5. The outside air pressure of 14.7 psia from assumption 3 is used as the initial pressure for each of the rooms even though the RB is maintained at a slight negative pressure per assumption 38. This is acceptable since an additional time is included in the GOTHIC model to allow the pressures in the RB to adjust an equilibrium steady state conditions with the assumed initial RB (average Refueling floor) pressure of -0.1 inwg before the assumed LOCA occurs.

Time Domains An interval of 999.9 seconds was used for the initial time domain to stabilize the RB pressures and an interval of 0.1 seconds was used for the second time domain to initialize the thermal conductors. Therefore, the LOCA is assumed to occur at 1000 seconds into the solution. A third time domain with an interval of 3600 seconds from 1000 to 4600 seconds was used after the LOCA occurs.

GOTHIC Input Files The GOTHIC input file for the Case 1 (summer conditions, no wind) is shown in Attachment B.

The inputs for the ambient air temperature, sol-air temperature, initial RB temperature, wind speed and corresponding wind pressures are the only differences in the other cases. The values used for each case are shown in Table 1 below. The values for the atmospheric wind pressures are from Table 6 of Attachment C. Table 2 lists the GOTHIC input files used for each of the cases. (Note: The test case is described in Attachment F.)

Calculation No. QDC-7500-M-2341 Revision 0 Page 28 of 36 Table 1: Input Parameters for Drawdown Cases Variable Case 1 Case 2 Case 3 Case 4 Description Summer, No Wind Summer, with Wind Winter, No Wind Winter, with Wind Outside Air Temperature (F) 93 93

-6

-6 Sol-Air temperature (F) 129 129 30 30 Initial Reactor Building Temperature (F) 104 104 65 65 Wind Speed (mph) 0 24 0

24 Wind Pressure, East Face (psia) 14.7 14.7077 14.7 14.7094 Wind Pressure, West Face (psia) 14.7 14.6959 14.7 14.6950 Wind Pressure, N/S Faces (psia) 14.7 14.6962 14.7 14.6953 Table 2: GOTHIC Input Files Input Filename Description GOTHIC Checksum Value QC Drawdown Case1.GTH Summer Conditions with No Wind 58280 QC Drawdown Case2.GTH Summer Conditions with 24 Mph Wind 35389 QC Drawdown Case3.GTH Winter Conditions with No Wind 41457 QC Drawdown Case4.GTH Winter Conditions with 24 Mph Wind 25423 QC Drawdown Test Case.GTH Test Conditions (see Attachment F) 37786

8. RESULTS The results for each of the cases is shown in Attachment D. The LOCA occurs at 1000 seconds on each of these plots. Figures 1 through 6 below summarize the pertinent results from the various cases. (Note: The results in Figures 1 through 6 on an adjusted time scale with time zero equal to 1000 seconds from the GOTHIC results, i.e. coincident with the time that the LOCA is assumed to occur.) The RB temperature profiles for summer conditions from Case 1 shown in Figure 1 are similar to those from Reference 2, which indicates that the RB heatup after the LOCA is being correctly modeled. Figures 2 and 3 show the pressures and differential pressures

Calculation No. QDC-7500-M-2341 Revision 0 Page 29 of 36 with respect to atmospheric pressure for the various levels of the Reactor Building. The RB pressures and differential pressures increase rapidly when the RB ventilation system trips after the LOCA and the RB temperatures begin to increase. The average differential pressure between the refueling floor and outside ambient is maintained at -0.1 inwg prior to the LOCA but becomes positive quickly after the RB ventilation system trips. The RB pressures and differential pressures begin to decrease after the SBGTS fan starts and exhausts air from the Reactor Building as shown in Figure 4, and eventually drop below the local outside air pressure, i.e. a negative pressure differential. The differential pressures for the lower elevations of the Reactor Building, measured with respect to the west wall environment, are lower (more negative) than those on the refueling floor. Therefore, the limiting average differential pressure for the refueling floor elevation is used to determine the drawdown times. For the cases with no wind (Cases 1 and 3), all the differential pressures on the refueling floor are identical. However, for the cases with wind (Cases 2 and 4), the differential pressures vary on the different walls of the refueling floor due to the different wind surface pressures. Figure 5 shows the differential pressures on the refueling floor for Case 2. The differential pressures are lowest, i.e. most negative, on the east (upwind) wall due to the assumed easterly wind and are lowest on the west (downwind) side of the Reactor Building. Figure 6 shows the average differential pressures on the refueling floor for each of the cases. The winter cases (Cases 3 and 4) result in the highest positive pressure differential due to the higher outside air density than for the summer cases. The cases with wind take only slightly longer for the average differential pressure to become negative. The winter case with wind (Case 4) is limiting due to the highest outside air density and wind pressures.

The following table compares the drawdown times for each of the cases. The average differential pressure of the refueling floor elevation is used to determine the drawdown times since this is consistent with the bases for the SBGT system and for the Technical Specification criteria of -0.25 inwg. (Ref. 6.c, 6.e, 8.a, 9) The drawdown time is determined from the time that GOTHIC control variable 5 (CV5) reduces below -0.25 inwg after the LOCA occurs at 1000 seconds in the analysis and subtracting 1000 seconds used in the analysis for the time period before the LOCA occurs. The drawdown time is slightly longer for the cases with wind (Cases 2 and 4) than the corresponding cases with no wind (Cases 1 and 3, respectively). The winter cases (Cases 3 and 4) have longer drawdown times than the summer cases (Cases 1 and 2) due to the higher outside air densities. The limiting drawdown time for the winter conditions with wind (Case 4) is 1376 seconds. Therefore, the design basis SC drawdown time is 1376 seconds, or approximately 22.9 minutes.

Table 3: Reactor Building Drawdown Times Case 1 Case 2 Case 3 Case 4 Description Summer, No Wind Summer, with Wind Winter, No Wind Winter, with Wind Drawdown Time (s) 1122 1154 1362 1376

Calculation No. QDC-7500-M-2341 Revision 0 Page 30 of 36

Calculation No. QDC-7500-M-2341 Revision 0 Page 31 of 36

Calculation No. QDC-7500-M-2341 Revision 0 Page 32 of 36

Calculation No. QDC-7500-M-2341 Revision 0 Page 33 of 36

Calculation No. QDC-7500-M-2341 Revision 0 Page 34 of 36

Calculation No. QDC-7500-M-2341 Revision 0 Page 35 of 36

Calculation No. QDC-7500-M-2341 Revision 0 Page 36 of 36

9. CONCLUSION The differential pressure inside the Quad Cities Reactor Building after a design basis LOCA will be less than the Technical Specification criteria of -0.25 inwg with respect to the outside air pressure after a drawdown time of 1376 seconds (22.9 minutes) under the limiting outside air temperature and wind conditions conforming with the RG 1.183 guidance. This insures that there will be no unfiltered exfiltration from the Reactor Building under these conditions.

An additional case to simulate RB isolation during normal operation, documented in Attachment F, was performed to estimate the drawdown time during test conditions. A drawdown time of 7.5 minutes, to reach an average RB pressure of -0.25 inwg, was calculated for the test conditions assumed in Attachment F.

10. ATTACHMENTS A. GOTHIC Model Schematic Diagram B. GOTHIC input File for Case 1 C. Calculation of GOTHIC Inputs D. GOTHIC Results E. Exelon TODI No. QDC-18-030, 12/17/2018 F. Drawdown Test Case

Calculation No. QDC-7500-M-2341 Rev. 0 Attachment A Page A1 of A1 55 Dec/20/2018 10:12:52 GOTHIC Version B.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon ASnauad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH bE3 25

Calculation No. QDC-7500-M-2341 Rev. 0 Attachm*ent 8 Page 81 of 839 Jan/30/2019 10:46:42 GOTHIC Version 8.2(QA) M Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon AST\\Quad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH Control Volume Parameters Vol Vol Elev Ht Hyd. D.

L/V IA SA Min Film Min Film Description (ft3)

(ft.)

(f~)

(ft}

(ft2)

FF (ft)

FF l

U2 Basement 554 324406.

554.

41.

11. s DEFAULT DEFAULT 2

U2 Ground 595 2538~5.

595.

28.

24.9 DEFAU~T DEFAULT 3

U2 Mezz 623 211675.

623.

24.5

24.

DEFAULT DEFAULT 4

U2 Main 647 163050.

647.5

19.

19.S DEFAUI,T DEFAULT s

U2 Reactor 666 181146.

666.5

24.

20. 3 DEFAUT..1T DE? AULT 6

Ul Basement 554 324406.

554.

41.

11.5 DEFAULT DEFJ\\lJJ..JT 7

Ul Ground 595 253845.

595.

28.

24.9 DEFAULT DEFAULT 8

Ul Mezz 623 211675.

623.

24.5

24.

DEFAULT DEFAULT 9

Ul Main 647 144497.

647.5

19.

2 2.

DEF.U.t.iLT DEFAULT 10 Ul Reactor 666 181146.

666.5

24.

20.3 DEFAULT DEFAULT 1 1 Refueling 690 1222452.

690.5 4.7.25 60.7 Di!: FAULT DEFAULT 12 N Wall Ambient le+lO 595.

400.

J.e+06 DEFAULT DEFAULT 1 3 s Wall Ar.1J;ient le+lO 595.

400.

le+06 DEFAULT DEFAULT 14 Exhaust. Ambient le+lO 595.

tiOO.

le+06 DEFAULT DEFAULT 15 U2 HVAC Supply 1000.

658.8

6.

DEFAULT DEFAULT 16 Ul HVAC Supply 10 0 0.

658.8

6.

DEF'Am.. T DEFAULT 17 U2 HVi".C Exhaust 1000.

658.8

6.

DEFAULT DEFAULT 18 Ul HVAC Exhat.:st 1000.

658.8

5.

6.

DEFAULT DEFAULT 19 E Wall Ambient le+lO 595.

400.

le+C6 DEFAULT DEFAULT 20 w Wal l Amb i ent le-.. 1 0 595.

400.

le+*06 DEF/I.ULT DEFAULT Control Vol ume Options Vol s Wave Pool HMT Poo l Pool Pres.

Fool Dp.

Gas Burn ICIP Damper Mult Opt Correction FF Tracking Opt Drag I

1

1.

DEFAULT LOCAL ON ON NONE ON 2

1.

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l.

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l.

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1.

DEFAULT LOCAL ON ON NONE ON 6

1.

DEFAULT LOCAL ON ON NONE ON 7

1.

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1.

DEFAULT LOCAL ON ON NONE ON 9

DEFAULT LOCAL ON ON NONE ON 10

l.

DEFAULT LOCAL ON ON NONE ON 11

l.

DEFAULT LOCAL ON ON NONE ON

Calculation No. QOC-7500*M-2341 Rev. 0 Attachment B Pag.e 82 of 839 Jan/30/2019 10:46:42 GOTHIC Version 8.2(0A) - Oct 2016 File: C \\Users\\jlwriylll\\Docurnents\\Exelon AST\\Ouad Cities Drawdown\\Gothic\\Final\\QC Drav*down Case 1. GTH c=

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I-.rea CpL io:i (ft2) c.n: I FORE DSFAUL'l' U:IIFORH DE.r.!\\ULT U~llFOR;'1 DEFAULT mJI FOP.~*l DE: FAULT U:HFORM D2FAULT UNIFORM DEFAULT UNTPORM DEFAU'.uT UNIFORM DEF.A.ULT UNI FORM DEFAULT UNI FOR?-;

DEFAULT UNH'ORM DEFAULT UN!FORM DEFAlJLT UNIFORM DEFAULT UNIFORM DEF'AtJLT WlIFORM DEFJ\\UI:T U~HF"ORM DEFAtJI,T UN!F'C~M DEF1\\ULT UilIFOR!*t DEFl>.UL'I' lJ.J ! FOR~*:

DEF.r...tJLT l.I'.'61FOP.l*!

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Calculation No. QDC-7500-M-2341 Rev. 0

Attachment B Page 83 of 839 3

Jan/30/2019 10:46:42 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users~lwright\\Documents\\Exelon ASnauad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH Turbulent Leakage Lk Rate Ref Ref Ref Sink Leak Vol Factor Press Temp Humid or Model Rep Subvol Area

!j

(%/hr)

(psia)

(F)

(%)

Src Option Wall Opticn (ft2) fL/D 1

0.

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o.

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c.

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CNST T UNIFORM DEF.l\\ULT 15

0.

CNST T UNIFORM DEFAULT 16

0.

CNST T UNIFORM DEFAULT 17

0.

CNST T UNIFORM DEF.n.ur.T 18

0.

CNST T UNIFORM DEFAULT 19

0.

C'IST T UNIFORM DEFAULT 20

0.

CNST T UNIFORM DEFAULT Discret.e Burn Parameters Min Min Max Burn Flame Burn Un Vol H2 02 H20 Length Speed Rate Burn Burn it Frac Frac Frac (ft)

(ft/s)

FF Frac Opt:

1 0.07 0.05 0.55 DEFAUI.1T DEFAULT DEFAULT FER 2

0.07 0.05 0.55 DEFAULT DEFAULT DEFAULT FBR 3

0.07 0.05 0.55 DEFAULT DEFAULT DEFAULT FER 4

0.07 a.cs 0.55 DEFAULT DEFAULT DEFAULT FBR 5

0.07 0.05 0.55 DEFAULT DEFAULT DEFAULT FBR 6

0.07 0.05 0.55 DEFAULT D3FAULT DEFAULT FER 7

0.07 0.05 0.55 DEFAULT DEFAULT DEFAULT FBR B

0.07 0.05 0.55 DEFAULT DEFAULT DEFAULT FBR 9

0.07 0.05 0.55 DEF.AULT DEFAUT..... T DEFAULT FBR 10 0.07 0.05 0.55 DEFAUL'f DEFAULT DEFAULT FBR 11 0.07 0.05 0.55 DEFAULT DEFAULT DEFAULT FBR 12 0.07 0.05 0.55 DEFAULT DEFAUl.1T DEFAULT FBR 13 0.07 0.05 0.55 DEFAUT.... T DEFAULT DEFAULT FBR 14 0.07 a.as 0.55 DEFAULT DEFAULT DEFAULT FBR 15 0.07 0.05 0.55 DEFAULT DEFAULT DEFAULT FBR

Calculation No. QDC-7500-M-2341 Rev. O A!taclirnent B

?age 84 of 839 4

jan/3012019 10:46:42 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jhNright\\Oocumcnts\\Exelon ASnQuad Cities Orawdown\\Gothic\\Final\\QC Drawdown Case 1.GTH Di :Je rel._! aur11 Para11eters (cont.)

Min Min

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Calculation No. QDC-7500-M-2341 Rev. O Attachment B Jan/30/2019 10:46:42 GOTHIC Vers!on 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon ASTIQuad Cities Drawdown\\Gothic\\Final\\QC Drawdovm Case 1.GTH 10 12 li lfi 18 Vol I*

1 2

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£l 10 1l 12 H

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D:EF'AG"LT DEFN.f".uT DEFA'JLT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT FF Pliltne Thick (ft.)

.1G4

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0. OS 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 o.os Page BS of 839 Turb 3urn Opt EDIS ED!S ED!S EDIS EDIS EDIS EDIS ZDIS EDIS t:D!S F..DIS EDIS EO!S

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DF:f'Atif:l' DEFAu:...T DEF'A!T:....T DEFALn,T DEFAULT DEFAULT DEFAur:r DEFAm,T DEFAL1:,T DEFt-.l"LT DEFAUI1T DEFAULT DEFAULT DEf'l~ULT 5

FF

Calculation No. QDC-7500*M-2341 Rev. O Attachment B Page 86 of 839 6

Jan/30/2019 10:46:42 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwrighl\\Documents\\Exelon ASnQuad Cities Drawdown\\Gothic\\Ffnal\\QC Drawdown Case 1. GTH Mechanisti:: Burn Propagation Parameters (cont.)

Unburned Burned cc Flow f?'lame rg Min rg Min ig Max Auto Ig Vol H2 H2 Vel Thick H2 02 Steam Te1r,p Frac Fr' Fr11c FF

{ft/s)

FF (ft) pp Fr.3c Frac l"rac

{Fl F?

17

0. 04

0. 001 DEFAtJl:.T 0.16.:.

0. 01 C. OS 0' 55 DEFAULT 18

0. 04 0.001 DSFAULT 0.164

0. 04 C.05 0.SS DEFAULT 19

0. 0*1

0. 001 DC:FAULT

0. 164

0. 04 Cl.OS G. SS DEFAULT 20 0 '04 0.001 DEFAULT 0. 164 0' 04

c. 05 D. 55 DEFAULT Fluid Boundary Conditions - Table l Press.

Temp.

Flow s

J ON OFF Elev.

BC#

Description (psia)

FF (F)

FF (lbm/s)

PF p

0 Trip Trip (ft) lP N Wall Ambient 14.7 1

2'I' N

N 595.

2F N Wall }\\mbient

14. 7 1

2T

\\.'lelO N

N 595.

3P s Wall Ambient 14.7 1

2T N

N 595.

4F s Wall Ambient

14. 7 1

2T vlelO N

N 595.

5P Exhaust Ambient 14.7 1

2T N

N 595.

6F Exhaust.i\\mbient

14. 7 1

2T vlel.O N

N 595.

7F U2 SFP Evap

1. 9*15 125 0.07 ST N

N 690.5 8F Ul SFP Evap 1.945 125 0.07 BT N

N 690.5 9P E Wall P..mbient 14.7 1

2T N

N 595.

lOF E Wall Ambient

14. 7 1

2T vlelO N

N 595.

11.P w Wall Ambient 14.7 1

2T N

N 595.

12F VJ Wall.r,mbient

11. 7 l

2T vlelO N

N 595.

Fluid Boundary Conditions - Table 2 Liq. v.

Stm. v.

Drop D.

Drop Drop Cpld Flow Heat Outlet BC#

Frac.

FF Frac.

FF (in)

FF GSD Frac.

FF EC#

Frac.

FF

{Bt:u/s)

FF Quality FF lP HlOO 9T NONE

1.

DEFAULT 2F HlOO 9T NONE

l.

DEFAULT 3P HlOO 9T NONE

1.

DEFAULT 4F HlOO 9T NONE

1.

DEFAULT 5P HlOO 9T NONE

1.

DEF JI.ULT 6F HlOO 9T NONE

1.

DEFAULT 7F 1

NONE

1.

DEFAULT BF l

NONE

l.

DEFAULT 9P HlOO 9T NONE

1.

DEFAULT lOF HlOO 9T NONE

l.

DEFAULT llP HlOO 9T NONE

1.

DEFAULT 12F HlOO 9T NONE

1.

DEFAULT

Calcu[ation No. QOC-750D*M-2341 Rev. O Attactirnent B Jan/30/2019 10:46:43 GOTH !C Version 82(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon AST\\Quad Cities Drawdown\\Gothic\\Fin.al\\QC Drawdown Case 1.GTH l?

2r JP SP 6!"

7F p,,.

JP 1 t) !-'

J1P 12F lt' 6F 7F BP lDF 1?

12F F.P.

2 3

Fluid Boundary Conditions - Table 3 VollltW' !;-t*ac:tions Air Gas 1.

FF Gas 3

l.

1.

l.

FF Ga:1 4 Fluid Boundary Conditions Table 4 Volume Fractions Liquid Gas 5 FF 6

FF Gas 7 Flow Paths

Table 1 Vol Elev Ht~

Descript.ion A

(ft)

(f; t l U2 Easement:-Grd S94~

1.

U2 Grou:-,d-Mezz 2

622.

l.

3 U2 Mezz-Main 646.5 Vol E

2 3

4 Elev (ft) 595 6 :2.3.

647. 5 (ft)

1.

Page B7 of 839 Tilt (deg)

Rot.

(deg) 7

Calculation No. QDC-7500-M-2341 Rev. 0 Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) -Oct 2016 File: C:\\Users\\j!wright\\Documents\\Exelon AST\\Quad Cities Drawdown\\Gothic\\Finaf\\QC Drawdown Case1.GTH r>. P.

lO 11 12 13 14 15 16 17 19 20 2l 22 23 25 26 28 29 30 31 33 35 36 37 38 39 40 41 42 4l r.s 46 48 Description U2 Main-Reactor U2 Reactor-Refu Ul Baserr.ent-G:r:d Ul Ground-Mezz Ul Mez.z-Kain Ul Main-Reactor Ul Reactor-Refu Ul-U2 Grnd Flr Ul-U2 Mezzanine 1:.n-v2 Main Flr U1-U2 Reactor F U2 Primary SGT Ul Standby SGT U2 Exhaust Vlv Ul Exhaust. Vlvt.

U2 Supply Vlv Ul Supply Vlv N' Wall Ambient l~ Wall Ambient S Wall Anbient S Wall /\\rnbient Exhaug t A:l'.bi ent U<. Supply Pan U2 Exhaust. Fan Ul Supply Fan Ul Exhaust. Fan U2 Torus Supply U2 595 Supply t:2 623 Supply U2 647 Supply U2 666 Supply U2 Refuel S'..lppl Ul Torus Supply Ul 595 Supply Ul 623 Supply u1 647 supply Ul 666 S*..,pply tJl Refuel Sup U2 Torug E..xh U2 595 Exhaust U2 62.3 l::xhauso::.

U2 64 7 Exhaust U:l 666 Exhaust U2 Refuel Exh vo::.

A 10 10 17 18 12 13 12 12 13 13 12 17 13 11 11 11 Flow ?aths - Table l l.;;or.t. l Elev Ht

'/ol

~lev F

(ft}

(ft)

(ft) 665. 5

l.

666. s 689.5

1.

11 690. s 594.

1.

7 595.

622.

1.

623.

616. 5 647. 5 665.5

1.

!C 666. 5 695. 5

1.

11 6~0. 5 595.

7.

7 595.

623.

7.

623.

647. s

7.

647. 5 666. s

7.

10 666. s 6'/0. a

2.

14 905.

670. 8

2.

14 905.

658. 8

6.

753.9 55ll. 8

6.

753.9 658. 8 6'

15 658 ' 8 658. s G.

658. B 595.

1.

lP 595.

595.

1.

2F 595.

595.

JP 595.

595.

4F 595.

595.

SP 595.

595.

6F 595.

5ss. e

6.

15 658. 8 658. a

6.

753. 9 658. 8

6.

16 658. 8 658. 9 753.9 555~

1.

15 659. 8 596.

l.

658. a 624.

1.

15 658. 8 648.

l.

15 658.S 667.

l.

15 658.8 691.

l.

15 658. 8 555.

l.

Hi 658. B 596.

L 16 658.a 624.

658. 8 648.

1.

16 658. 8 667.

1.

16 659. 8 691.

16 658. 8 SSS.

l.

l. 7 658.8 596.

17 658.8 624.

l.

17 658. 8 648.

17 659. a 667.

17 658. B 691.

17 658. a Page 88 of 839 8

Ht Tilt Rot.

(ft)

(degi (deg)

1.

l.

1.

7.

6.

l.

6.

1.

l.

1.

l.

1.

l.

1.

l.

Calculation No. QDC-7500-M-2341 Rev. O Attachment B Page 89 of 839 9

Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA} - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon Asnauad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH Flow Pat.hs Table (cont.)

F.P.

Vol

lev Ht Vol Elev Ht

'Tilt Rot..

Description A

F (ft)

(=t)

B (ft }

( ft)

{d:g )

(deg )

49 Ul Toru:; Exh SSS.

1.

18 6SS. 8

1.

50 Ul 595 Exhaust 590.

1.

18 658. 8

1.

51 Ul 623 Exhaust 624.

1.

18 658. 8

l.

52 Ul 647 Exha*..!st 6~8.

1.

18 658. 8

1.

53 Ul 666 Exh.a.u st 10 667.

1.

18 658.B L

54 Ul Re~l.:.e l E:xh 11 691.

1.

18 658 ' 8

1.

SS U2 S!'P Evap 11 590.5

l.

'/F 690.S 56 Ul SFP Evap 11 690. 5

1.

BF 6'.}0' 5

1.

57 s Refuel w.111 ll 69l.

l.

l3 691.

l.

SS N Refuel

.;,~ 11 ll 69L

l.

12 691.

1' 59 E Wall Ambient 19 595.

l.

9P 595.

1.

60 E Wall Anbient.

19 SSS.

l.

lOP 595 '

1.

61

.; Wall Anbie nt 20 SSS.

L llP 595 '

L 62 w Wall Ai~bi.,,n::

20 555.

I.

12F 595'

1.

6)

E Refuel Wall 11 69l.

l.

19 691.

1.

M w Refuel Wall 11 691.

20 69l.

1.

55 U2 554 DP 594.

l.

12 595.

l.

66 U2 595 DP 596.

l.

12 596.

l.

57 U2 623 DP 62~.

1.

12 624.

L 68 U2 647 D?

64 8.

1.

12 648.

6 9 U:G 665 D?

667.

1.

12 667.

L Flow Paths - Table 2 Flow Flow Hyd.

Inertia Friction Relative Lam Dep Mom St rat Path A:::ea Diam.

Length Length Rough-Geom Bend Trn Fl ow (ft2)

(ft)

{ft) ness Fact (deg)

Opt Opt 1

32.

4.

34.5 DEFA

0.

NONE 2

380.

19.5 26.25 DEFA

0.

NONE!

3 285.

14.6

?.l. 75 DEFA

0.

NONE 4

.380.

19.5

21. 5 DEFA

0.

N:'JNE 5

380.

19.5 35.625 DEFA

0.

NONE 6

32.

4.

34.5 DEFA 0.

NONE 7

380.

19.5 26.25 DEFA

0.

NONE 8

190.

9.7 21.75 DEFA

0.

NO:N"E 9

380.

19.5

21. 5 DEFA

0.

NONE 10 380.

19.5 35.625 DEFA

0.

NONE 11

21.

ti. 2 147.

DEFA

0.

NONE 12

21.

4.2 147.

DEFA

0.

NONE 13 le-06 1.2 147.

DEFA

0.

KONE 14 le-05 4.2 147.

DEFA 0.

NONE 15 3.14

2.

1.

DEFA

0.

NONE

Calculation No. QDC-7500-M-2341 Rev. O Attachment B Page 810 of 839 10 Jan/30/2019 10:46:43 GOH-HG Version 8.2(0A) - Oct 2016 File: C:\\Uscrs\\jlwright\\Docurnents\\Exe!on ASnQuad Cities Orawdown\\Golt1ic\\Final\\OC Drawdown Casc1.GTH MC'."',

t!t )

(ft}

(fU Cpt Opt.

16 lH

2.

0.

NO Ne

,J 0.

HONE i a fi.

L NCt*:E

rn. J

6.

(),

HONE 2(J 28 j

6,

l.

DEFA

o.

HONE.

21

l.

(),

NONE 22 l>>t 10 letll)

1.

OP!FA

o.

NONE 2!

lndO ledO

1.

a.

NONE le+ 11}

l.

1.o* lO

1.

l.

6.

1.

30 J7

..l

1.

NONE HONE L

0.

NONE

. ]

6.

l.

0.

NONE

.. I 6,

l.

DSFA

0.

L,

1.

0.

?-:ONE 43

0.

NCNE 2fl. J

l.

NOHE 2 a.. l

6.

0.

47 L

IL 51 L

c.

l l 53 1::0.

l.

DE~'A

0.

?JONE l J':.i]

HJ().

DEFA 57 D 29

l.

DEFA

(),

NO?:E sa f) 29

1.

f),

!\\ONE 5'l

1.

DEFA 0'

NONE

Calculation No. QDC-7500-M-2341 Rev. 0 Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon ASnQuad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case I.GTH Flow Path 60 61 62 65 66 67 5B 69 Flow Path 1

2 3

4 5

6 7

8 9

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Flow

/\\rea (ft2) lei-lC 1'Hl0 te.-10

0. 726 0.726 le-12 le-12 le-12 le-12 le-12 Fwd.

Loss Coeff.

2.85 2.85 2.85 2.85 2.85 2.85 2.85 2.85 2.85 2.85

2. 85 2.85 2.85 130.6 130.6 le+60 le+60 0.38 0.38 le-60 le-60 le-60 le-60 le-60 Plew Pat.hs -

Ta=>le 2 (cont.. i Hy::i.

!nertia Friction Diam.

Lcmg::h Length FF (ft;l (ft)

(ft) le.- IC

1.

le 1-!0

l.

ltHlO

1.

l.

1.

l.

1.

l.

1.

Flow Paths - Table Rev.

Loss Coeff.

2.85 2.85 2.85 2.85 2.85

2. 83 2.85

?.

85 2.83 2.85 2.85 2.85 2.85 2.85 le+60 le+60 o.3a 0.38 le+60 lei-60 le-60 le-60 le-60 le-60 le-60 Comp.

FF Opt.

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF Critical Flow

?-'.odel OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF Ql<'k' Q;:"l';'

OFF Q:;'i;>

OFF O?'F O:'F O:?F O:?F OFF OFF OFF OFF OFF OFF Relative Ro;.:gh-ness Exit Loss Coeff.

0.

Dep Geor.1 Bend Fact (deg)

DEFA DEFA DEFA DEFA DEFA DEPA DEPA DEFA DE.FA Drop Breakup Model OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF Mom Trn Opt

0.

0..

c.

0.

Homog.

Flow Opt.

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF Page 811 of839 11 St rat E'low Opt.

NONE NONE llONE NCNE NONE

Calculallon No. QDC-7500-M-2341 Rev. o Attachment B Page B12 of B39 12 Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwngllt\\Documents\\E.xelon ASnOuad Cities Drawdown\\Gothic\\Flna!\\QC Drawdown Case1.GTH Critical CrF 27 le.. 2!J OFi' GFP CFF 28 l';!-:rn OF?

0.

OFF OFF 29 l*-' - 20 le-20 OFc OFF' OFF OFF OFF,

OPP l1 31 '7. l Jl7.1 OFF OoF 6 l 5 ' ti 61S 9 OFF OFF OFF OFF J]

21 'J OFF OFF

!),

OFF l lO\\l. 7 1100.7 OFF OFF OFF JS

~9)'

9!D. 5 OFP CFF OFT OFF 176.1 C*FF 317.1 CFF 51S.

CFF C?F 219.

OFF OFF 93J.5 Off CFF OFC

(.lf'F 1JFF I

OFF 217...

CFF OFF l'.l)2.7 GFF OFF 47 CFF 174.B CFF

(,

49 J l*I JH.S CFF OFF so i; l l. 4 611. 4 OFF 0,

OFF 51 21*1 '1 217...

OFF

0.

OPf.'

OFP 1092' 'I 10~12. 7 OFP O~F

a.

OFF OFF CFF OFF OFF 54 l 7<f. 8 OFF OPF l*: - 1(!

le* 10 OFF DFF 0,

OF'F OFF S5 le-10 OFF OFF OFF S7 2 85 CFF OFF Oi?f' OFF OFF OFF OF'F JFF 61 CFF OFF 62 G?F OF?

6J CFF OFF

5 OFF CFP QFF 65 2 85 OFF OFF

. as OFF OFF 61

!lS 2 ' 85 OFP CFF OFF 68

, SS 2.85 OFF OFF

2. as 2.BS OF!"

OFF OFF

Calculation No. QDC-7500-M-2341 Rev. O Attacn:r.ent B Jan/3012019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 FHe: C:\\Users\\jlwright\\Documents\\Exelon AST\\Quad Cities DrawcJown\\G:ithic\\Final\\QC Drawdown Case1.GTH Flow Path l

3 4

5 6

7 8

9 10 11 12 13 1.5 16 17 18 19 20 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 4.3 Frac

0.

0.06 0 OG

0. ()f, C OG 0

.06

0.

O.OG 0.0G 0

0.

lJ. OG 0.06

0.

0 Df:i

0. ()(;

0.

OS

0. Q(,

O.OG O. G6 (J. UG

.06 0.06 O.OG 0.06 0.06 0.05

. 06

c. 06 Fcrward Min 02 Frac 0.05 o.cs 0.05 0.05 0.05 0.05 0.05 C.05 05 0.05 0.05 0.05 0.05 C.05

~05

. 05 0.05 0.05 0.05 0.05

(). 05 C.05 G.CS 0.05 0.05 0.05 0.05

. 05 0.05 a.cs 0.05 0.05 0.05 0.05 Q.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Q.05 Flow Paths -

Tabl~ 4 Max mo Pr.*ac 0

.55 0 55

0. 55

0. 55 0.55

.55

0. 5')

0.

o.ss 0_55

0. ~)'.)

0 55

(). 55 0.55 o.~5 0 55

.55 0

0.55 0.55 0.55 0 5'.l 0.

. 55 0.55 0.55 0.55 0.55 55 O SS

0. 5 Min H2 F~:ac 0.06 O.D6 Q_06 0.06 0.06 0.06 0.06 G.. 06 0.. 06 0.06 0.05 0.05 0.06 0~06 C.06 0,. 06 0.06 0.06 0.06 0.06

.06 O.C6 O.C6 0.06 0.06 0.06 0.06 0.C6 0.06 0.06 0.06 O.C6 0.06

0. C*6 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 Reverse Min 02 n.

05

.05 0.05 0.05 0.05 05 0.05

0. o.:..

0. o:,

o.os 0~05

.05 0.05 0.05 0.05

.OS

0.

0. DS 0.05 0.05 o.os

o. o::

.05 0.05 o.os o.cs

. cs

.(5 0.05 0.05

0. 05 c.cs G OS O.QS Max H20 Frac 0.55 D.. SS 0.55 0.55 0.55

0. s::,

0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 C.55 o.ss 0.55 o.ss 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 Runt Pro;::;

-a th Ti me Zero Prop Frac Flow Opt 0. 5 NO COPLOI*;

5 0.5 0.5 o.s

(). 5

.. ~

. 5

o. 5

o.

0.5

.5

0.

0.5 0.5 0.5

0.

0 5 0.5 0.5 0 s f).

0.

o.s Cl. s

(.l 5 0 5 0~5 o.s 0.5

(). s 0.5 0.5 0.5 0.5 0.5 UO COF'I.OW NO COFLOW NO COFLOW NO COFLOW NO COFLOW NO COFLOW NO COFL(JW NO COFLOW NO COFLOW NO COFLOW NO COFI..OW

~:o COFLQW t,10 NO COFLOW NO CO!"LOW NO COFLOW NO COFl,OW NO COFLO'tl

~m COPL0\\-1 NO Ct)FLOW NO t;c COFLOW NO COF'LOt*;

NO COFLOW NO COFLOW NO COFI.OW NO COPLOW NO CCFLO\\':

NO COFLOW NO COFLO\\"l NO COI*'LOW NO COFWW NO COFLOW NO COF'LON NO COFLOW t:o COFLOW Page 813 of 839 13

Calculation No. QDC-7500-M-2341 Rev. O Attachment B Page 814 of 839 Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA} *Oct 2016 File: C:\\Users\\jtwrighl\\Documents\\Exelon AST\\Ouad Cities Drawdown\\Gothfc\\Final\\QC Drawdown Case1.GTH Flow P.nh ii

Table *I kont. )

ForwJr:d Prnp M.:.n Min Min B..:rn H2 02 H2C

!U 01 HJ(!

Ti.,...e Fr.J.c fr.1.C F::s ::

Fra~

C C6 c cs

0. SS C.06

c. 0 c !)5 Q. SS o.;

l'. 06

c. :)5 n.ss

0. 05

{!5 tl. SS 0. 5

0. Ot D. GS l}.(l t; o.s l:O C:Ol-'LOW HI 0.06

0. 05 0 55 IL06

0. O'i 0. 55 0.5 ll<J COl-'LOi'l 0.06 D. 05

0. 1.) 5

(). 06 tJ. OS 0. *j <;

0.5 C!. 06 o.os

0. 55

0. OE c 5 NO CO!" LOW Sl C*. 06 C. OE

o. os 0. 55

Kl COFLC: ;.;

51

_ 0 5S J.S SJ 0. OE

0. 05 0. 5 5

. S S c-ns

0. SS c.s o. c:;

O. SS 0. s

!:Q CG F LO~

(). 06 o.~s

0. SS

0. ()6

!) * (".>

0. SS Ci. 5 tJO COFLOf.J 57 0.05 D n~

0.5S

0. 06 0 OS

o. sc; 0.5 ria cor-*1.ow 0.06

0. !>S I). 06 0

O~i c.s rio CO PI.OW 0.06 (J. 05 0.55

[). 06 a os 0 SS 0.5

.06 0 'i5

c. 06

o. ~s

a. s r:o CO Fl.OW

'Jl C*. 06 0. SS

n. o-5

r.

SS 0

c.

C. OS O. Oe O.SS

'1. ts a.cs 0.5

~*L 55 c $

o ~s

.s 65 S5 0 cs

c. 06 0.(15

()

i5 a.06

[) SS

o.

vu con.ow

()/

c. 05

o. or; Q. ~~I

0. 05

0. (15 o.ss o.s HO CO Pt.On GH 0.06 0. O!J 0 SS

0. 06

[J 05 IJ. 55

(). 5 tlO COFl,Orl 0.06 0 OS 0. 55 0.06

0. Q'.i

0. 55 O.S NO f:OFl.Gh'

~--------------*------------------ ------------

Cond 1

2 3

6 7

B 9

Descriptio:i U2 Base -

595 U2 595 -

623 U2 623 -

647 U2 54 7-666 U2 565 - Reft:el Ul 3ase -

595 Ul 595 -

623 Ul -523 -

647 Ul 647-666

\\/ol 2

3 4

7 e

Srf Opt 2

2 2

Vcl B

2 3

4 5

ll 7

8 s

10 Srf Opt 3

3 3

3 Cond Type 5

2 4

s 2

4 S. A.

(ft2) 11449.

11098.

7520.

8801.

10064.

!.14.49.

l c~ 3 5.

7707.

BBOl.

!nit.

T. (F) t 04.

J.04.

104.

1 04.

t C4.

104.

I/X x

x x

x Grp 14

Calculation No. QDC-7500-M-2341Rev.0 Page 815 of 839 15 Janf30/2019 10:46:43 GOTHIC Version 8.2(0A) - Oct 2016 File: C:\\UsersWwright\\Documents\\Exeron Asnouad Cities Orawdown\\Go!hlc\\Final\\QC Drawdown Case1.GTH 1'h2i:mal Conductors !cont. l Cond

\\lol Srf Vol Srf Cond S. A rnit.

Grp Des er ipt; io::-.

A Opt OpL

rype

c I

1:JD6-t.

3CCO l );.

lC.;.

x U2 Ul £23 2574 x

U2 Ul 647 1127.

104 lS

\\12 Ul 6&G Hi HS2.

lM.

x 16 U2 Base -

Adj 37655.

17 U:Z 595 Adj 1114.

U2 6.23 - Mj 7534.

19 UL t54.7 Adj 6172

C*f

tr2 623

.. dj 7525.

U2 647 Adj 6172.

l 04 2S U2 666

Adj 26 U2 Bciae -

DW 9068.

lfl*l.

U2 595 DW ll 4M2.

t!Jl.

U.2 ti2J DW 12 2174.

O*l.

1651.

l J t:l 53S - :;;

ll lJl 623 r:w 11 12 2174 H

L!l &4 7 ow 11 11 16:>1.

JS Ul 666 DW l 0 l1 10 1638.

36 U2 9a.se

... Torus l:>

3200().

l O*l.

]7 U2 Base Pipes 16 712.S.

Ja U2 595 t'ipes 79J.

3 ')

U2 623 Pipes H*1 15 2'.lB 2942.

!H

~..J2 666 -

SFF 5{10, 44 u1 623 srP 11 2008.

Ul 647 -

SFF l

11 2942.

Ul 666 -

SFP 10 ll S06<t.

Refuel -

U2 DW ll 12 1152.

I 01.

Refu.el -

Ul DW 11 11 12 HS2.

llJ.i

\\9

~e!uel - TB 11 ll 662.

lO*l ll Sl Re!t:el

'Rcof l!.

lS 14 H.COC.

51.

"' SF?

Refuel l3Sl.

53 U'l Sf?

Ref*,;,e 1 11 l'.ls.3.

Ca[culation No. QDC-7500-M*2341 Rev. O Jan/30/2019 10:46:43 GOTHIC Verslon 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documenls\\Exelon ASTIQuad ~ities Drawdovm\\Golt1ic\\Final\\QC Drawdown Case1.GTH 4

6 7

8 9

0

,2 1-i 1 5 16 17 18 l 9 20 22 24 25 26 27

?.O

?.9 30

~ 1 33

)4

)5

](,

37 38 39 40 4 1 ti 2 4 3 44 45 7henna l Conductors - Radiation Pan1111r:t:ers Therm. Rad.

Side A

~ro

!'!O No No No No No No No No Ne No r:o N0 No No No No NO No No t,:o No No No NO No No No No No No No No No No No No No No No r:o No No No

£-:miss.

Side A Therm. Rad.

Side B No No No No No No No No No No No No No No No

~lo No No No No No No No No No ND No No No No No No No No No No No Emiss.

Side E Sccpr?

FU!,L

FULl, FUL!.

FUJ,1.

FULI, FfJ[,r, FUf,t,

!*'Ur.I, FtJI,t, FULL FOLL

FULI, FUI.* J, FU!,!,

FULL f.'ULL FUI,t,

FULl, FULL FU!.!,

FULL FULL F'Ul.L FULL FULL FULL FULL FUt"i~

FUlxL F'UJ~J, FUl.t, Fur.r.

FUI.. L FULL f'ULL FULL

!*UJ,1.

Page 816 of 839 16

Calculation No. QDC-7500-M-2341 Rev. O Attachment B Page 817 of 839 jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon AST\\Quad CWes Drawdown\\Gothic\\Fina!\\QC Drawdown Case1.GTH Cond

'16 1?

49 49 50 Sl 52 SJ Surf Opt 1

2 3

4 5

6 7

B 9

1 0 11 12 13 1 11 15 Surf Opt 1

2 3

4 The!":r.al Conduc::.ors - P.3dia ti on ?aramet-::r!l

~cont

. I Ther.n. Rad.

Emiss.

Ther:r.. Rad.

E:r.~ss.

Side A Si.de A Side E Side 3 Scc;;ie No

?;o FULL No No PULL

-lo No FULL Mo r:o i"ULL No No PULL No

~;o PULL No I

No t*!o t:o FULL

?ULL Conductor Surface Options - Table 1 Description Interior Wall I n t Ceiling Int Floor Insulated Torus Pipes LOCA SP Temp LOCA Dvl Temp LOCP. SFP Temp Noi:-mal SP Temp Norrr:al DW Temp Normal SFP Temp Turb i ne Bldg Outside Air Roof Sol-Air T Heat Transfer Option Direct Dir-ect Direct Sp Heat Direct Dii:-ect Sp Temp Sp Temp Sp Temp Sp 're:np Sp Temp Sp Te:np Sp Heat Sp Temp Sp Temp

~om i na l Value

0.

1.

125.

98.

150.

125.

0.

93.

129.

Cnd/

Cnv FF Opt.

3T 3T 3T 3T 3T 6T 7T end Opt DLM-FM DLM-FM DLM-FM DLM-FM DLM-F:1 Ccnductor Surface Options - Table 2 t-:in Max Convect. i on Condensation Sp Cnv HTC Rad to Steam Nat Cnv Opt VE:RT SURF FACE DOWN FACE UP HORZ CYI, P.ORZ CYL Phase Liq Li q Bulk Terr.p Bulk Temp Emissivity Opt Fr act Fr act Model FF Model FF Dry Wet VP.P Tg-T!:

Tb-Tw DEFAtJLT DEFAULT VAP Tg-Tf Tb-Tw DEFAULT DEFJUJI,T VAP Tg-Tf Tb-Tw DEFAULT DEFAULT 17 Fo::-

Cn v Opt OFF OFF OFF OFF OFF

Calculation No. ODC-7500-M-234 l Rev O

\\ttachment B Jan/30/2019 10: 46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwrigllt\\Documents\\Exelon AS 1\\Quad Cities Drawdown\\Gothic\\Final\\QC Drawrtown Case1.GTH s~r:

Cp::

10 11

.3-lS SCJrf Opt 1

3 5

G 7

8 9

11 12 13 14 15 Surf Opt

¢ 1

1i:-.

~! a x Cc :w~ct !.:l:~

Plt.; :; e Liq

!,i, 3ul '.< rernp Opt Frac;:t FLLCt MCd*.::l v~,ri Tg -Tf

.Jn.t'

'!'g*Tf Cor:d1:ct o r Surface Opt i o ns - Table Char.

Len,] th (ft.)

No rn Vel

( fL/s)

Minir.mm Vel Conv HTC (B/h-f2-F)

EfAULT DEF.: :..UI,T DE?.!\\.U:.T D?:F.f'.~JLT DEFAlJLT Cn:1..ciet'.Sa~ i cn 3 *~1:-: TQmp

~-F Char.

He ight

( tt)

DSFAUl.T D2F1\\UI,T DEF'Am:r DEF!;l:L.1' DEFl\\t:I,T C*:cclel Th-Tw Tb-T;.*

Cor.d.

Leng ch (ft)

DE?l\\.ULT

JEE'1'.1.JLT D2l-... ~\\tiLT DEFAULT DEFAtlL'r Conductor Surface Op&ions - Table 4 Total Peak Initial Heat Tirr,e Exp Value CT

<Bt:.i)

( Sf? -!:)

XT (3/h-f2-Fi

?.,El

~o SteaP1 E;nissivity PV Dry

\\':(_.. ~

OEFJ\\UL7 DH'AlrL'r DZF'f'!.ULT DE.?AUL'r BD Post-BO Exp Exp yt Xt Page 818 of 839 18 Post-BO Direct..

F'F

Caiculation No. QDC-7500-M -2341 Rev. O Jan/3012019 10:46:43 GOTHIC Version 8.2(0A} - Oct 2016 File: C:\\Users\\jlwrighl\\Docurnents\\Exefon Asnauad Cities Orawdown\\Gothic\\Flnal\\QC Drawdown Case1.GTH Ccndu:::tc1r 5ut'L.1ctl Opt.ions - Tablt? 4 *unt l Sur~

ToT',.ll Peak lfiit.ial

()pt; Const.

i;,,a t Ti *ne i'Oxp

'/:i.l*.1c CT

! !ltt:)

(~ eel XT n1/n-t2~r*i 10 15 Conductor Surface Options -

Forced Convection Vari ab l e s h 1~ c -

\\k/ ll *

(A + 3... Re**c*?r.. *r.n Surf Opt Conv...,,lar.....

Cc.;nv V:i.r B Conv Var c If Norn.

FP

!'!om.

FF l*:om.

FF l

0.

0.023 O.H 2

0.

0. 0?.3

0. 11 J

0.

0.02) 1). B 4

0.

0. O'.D

). 8 5

0.

0.02)

). B 6

c.

0.023

-J. A 7

0.

O. G23 J.6 B

0.

0.023

J. B 9

0.

0.02.3 0.13 10

0.

0.023

[j. 8 l1

0.

0.023 0.8 12

0.

0.023 0.8 13

0.

0.023

(). 0 14

0.

0. 023 O.B 15

0.

0.023 o.a SD Po:;t

B'.l Exp yt ict Conv Var !..)

Norn.

FF 0.4 0.4 0.4 0.4 0.4 C.4 w 4 c.'i 0..

0.4 0.4

0. '1 0.4 0 - *1 0.4 Page 819 of 839 19 Pcfi::.-sc D~ rect FF

Calculation No. QDC-7500-M~2341 Rev. 0 Attachment B Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA)

Oct 2016 File: C:\\Users\\jlwrigtit\\Documents\\Exe!on AST\\Quad Cities Drawdown\\Gothrc\\Final\\QC Drawdown Case1.GTH Conductor S1..:rfac e Options -

~;atural Convectio:i Va:-i abl c :;

Su::- f Opt 1:

2

-~

1 r,

G 7

8

'.)

10 l1 12 13 Vom.

0 0

0

0.

o.

0.

G L1_

n.

~).

Type Descr ipt.i o n l

1' w~111 2

1. 2S' Wall 3

1. 5 '

Weil l 1. 7 ~'

Wa ll 5

2' Wal l

!j 2. 2':>. Wa1 l 7

2 ~ !.) t Wa 11 B

3' vial l.

9 4

Wit l l 10 S' Viall 11 G'

h'a1 1 12

8. \\*ia.1 1 1.)

Rctu e1

~*1 <""1 11 14

!h:fuc l Cc ilir.g 15 Toru;;

16 Pipe 17 SF? Suz:tace Ncm.

0.59

0. 59 0.59 0.59 0.59 0.59 0.59 0.59

0. 59 0.59 C.59 G. 59

. 59 C.59 0.59 Co:v..t Vnr C Norn.

0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0. 25 0.25 0.25 iJ. 25 0.25 The r :r.al Cor:ductor Typ es Thick.

Geom (in)

WAfJL

12.

vi ALL

15.

1*tl\\t.r_,

lB.

WALL

21.

WALL 24 WALL

?.7.

WALL 3 0.

~*;,.L.,L L 36 WALL 4E W~. JJ~I 6-::';.

t:A.1'!..i 72 WALL 96 (li\\ __ :.,s 1 s W~. :... L s. s WP..LL 0.5 WALL 0.12 WALL 0.001 O.D.

(in)

o.

0.

Cl.

0.

tJ

0.

F'F Cor~v Vat* D Norn~

FF 0 25 0.25 il 2$

0. 25 0.7.S O.?.S

0. 7.S

0. 2'.1 0.25

0. 25 0.2 '1 25

. 2S

. 2 s Heat He9ions (Bt.u/ f r.3 - s )

l

1.

1

0.

o.

0.

o.

0.

Page 620 of 839 20 Heat FF

Calculation No. QDC-7500-M-2341 Rev. 0 Attachment B Page 821 of 839 21 Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwrighl\\Documents\\Exelon ASnQuad Cities Drawdown\\Gothic\\Fina!\\QC Drawdown Case1.GTH Thermal Conductor Type 1

l' Wall Mat.

Bd:::-y.

Thick Sub-Heat Region (in)

(in) regs.

Factor 1

I 1

I

0. I

12. I 10 I

0.

Thermal Conductor Type 2

1.25' Wall Mat.

Bdry.

Thick Sub-Heat Region (in)

(in) regs.

Factor 1

I l

I

0. I

15. I 10 I

0.

T!1ermal Conductor Type 3

1. 5' Wall Mat.

Bdry.

Thick Sub-Heat Region

{in)

(in) regs.

.:;'act.or l

I 1

I

o. I 1.8. I 10 I

0.

Thermal Conductor Type 4

1-75' Wall Mat.

Bdry.

Thick Sub-Heat Region (in)

(in) regs.

.<'actor l

I 1

I

0. I

21. I 10 I

0.

Calculation No. QDC-7500-M-2341 Rev. O Attachment B Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon Asnauad Cities Dra\\ivdown\\Gothic\\Final\\QC Drawdown Case1.GTH Mat.

Region 1

I 1

Mat.

Reg.ion 1

1 Mat.

Region 1 I 1

Mat.

Region 1 I 1

Thermal Conduct.or Type 5

2' Wall Bdry.

Thick Sub-Heat (in)

(in) regs.

?actor I

0. I

21. I 10 I

0.

Thermal Conductor Type 6

2.25' Wall Bdry.

(in)

0.

Thermal Conductor 7

2.5' Wall Bdry.

(in) l

0. I Thern:al Conductor 8

3, Wall Bdry.

{in)

I

0. I Thick Sub-Heat (in) regs.

actor

27.

10

0.

Type Thick Sub-Heat (in) regs.

Factor 30. I 10 I

0.

Type Thick Sub-Heat (in) regs.

F'actor

36. I 10 I

0.

Page 822 of 839 22

Ca!culation No. QOC-7500-M*2341 Rev. 0 t.... \\tachrnent B

.Jan/3012019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exeion ASnQuad Cities Drawdown\\Gothic\\Final\\QC Orawdo*tm Case 1.GTH r*:at.

?.cg ion I

Mat..

1

la':.

J..'.egion l

1

t:c. t.

Region fT 1

I 1

Thermal Conductor Type 9

1' Wall bdry.

Thick (ill)

{in)

I

0. I Thermal Conductor Type 10 5' Wall 3dry.

( in)

( i.n) 0.

Thermal Conduct:o:r Type

'l 1 6 I

~*~ d_ l ]

4!L

60.

Ber ::'.

'?h ie%

(i r: i (in )

I

() I

72.

Therma} Conduc tor Type 12

!:ldry.

Thie~

( i r: )

<i n)

I 0. I

96.

Sub Ho at re~J s.

I 10 l 0.

Sub-regs.

Fa ct. o r 10 0.

S'...:b -

!ie a t reg~.

Fac:: t:o r I

10 l 0.

£1... :b

egs.

I 1() I 0.

Page 823 of 839 23

Calculation No. QDC-7500-M-2341 Rev. 0 Attachment B Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documenls\\Exefon ASnOuad Cities Orawdown\\Gothic\\Final\\QC Drav.;dcwn Case1 GTH Req.ion 2

3 1

R1~gio11 1

Mat..

The:r.ma.1 Conductor Type u

Refuel Wull BrJ:ry.

in)

?hick (in)

Sub -

regs..

Factor 3

l. 5 i*'.at.

1 4

5 Mat.

2 Mat~

2 Thermal Conductor Type Refuel Ceiling Bdry.

inl

!klry.

0.

3.

4.S Thick

{in )

3.5

1.

Thick regs.

s 5

0

( inl (in) regs.

r**acLor

0.

0.5 10

o.

Thermal Cor-.ductc:- Type Bdry.

( ill) lG Pipe

a.

Thick Sub-(in) regs.

Far:: tor 0.12 5

0.

Page 824 of 839

Calculation No. QDC-7500-M-2341 Rev. O l\\llachn~enl B Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA)

Oct 2016 f-i!e: C:\\Users\\jlwright\\Documents\\Exelon ASnOuad Cities Drawdown\\Golhic\\Final\\QC Drawdown Case1.GT* f P.egion I

Heater Cooler

r:

2H

m 4H SH 6H 7H

!ill 9E I C:i

.i 1;.;

12C Vol Fan 10 U2 2Q Ul

)Q U2 40 Ul SQ U2 6Q Ul Mat.

2

'l:hermal Conductor Type 1.,

SFP ~~urface Bdry.

Thick

{in)

( ir.)

I

0. I 0.001 Sub-regs.

Fa c tor I

I 0.

Cooler/l!ef.ltcr On Off Flow Vol Trip Tr*ip Rii t.c Descr it-it i 0 :1 r,

(Crl-i)

U2 Sas!':'! ~ne:1t 1

ti2 Grot ind. r*1 r*

7.

l u-2 Mezzar.inc 3

U2 Main Flr 4

1 U2 Reactor Fl 1

Ul Basement 6

l Ul Ground Fl !"

1 Ul t*~ezzar:ine 8

1 Ul Main

~' l r 9

u: ?.eac ::o r Fl l C 1

I Refuel ir: ~J Y.-1 ?~

11

_L Pump Rn~

C oo lf~

l Vclurm:. t. ric Fan -* Table 1 F1o**:

On Cff Mi n Pat.h Trip F~rip DP Descript.io rt rt u

(psi )

?rir:i.ary SGT

~ c-D E~P. :J LT St.ancby SGT 16 DE-~FAtJr,T RB Supply 27 DSFAUt.'l' RB Supply 29 1

D!~r'!i.ULT RB Exhaust 28 4

3 D8Fl\\ULT RB Exhaust 30 4

DE: FAULT Flo*,.,-

Heat Heat Rate Rate Rat.e FF (Etu/s l FF

.; 30.

'11 7 98. 5 J2 24. 1 58

'1 s. 4 102. 4 3 ?.

21 6 7:. 7 l

'1'!'

Max DP

(_;::sil DEFAULT DEFAULT DEFJl.UL'r DEFAULT DEFAULT DEFAU-'-'T Page 825 of B39 25 P!ls Ctrlr Opt Loe VTI 1

VTI 2

VTI 3

VTT 4

V'rl 5

VTI 6

\\!TI 7

VTI s

\\:TI 9

VTI lG VTI 1.1 VTE l

Calculation No. QDC-7500-M-2341 Rev. O Attachment B Page 826 of 839 26 Jan/3012019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\UsersWwright\\Docurnents\\Exelon ASnQuad Cities Drawdown\\Gotllic\\Final\\QC Drawdown Case1.GTH Volumetric Fan - Table 2 Vol Flo~*

Flow Heat:.

Heat Fan Flo*,.,*

Rate Rate Heat Rate Rate Disch Option (CFM)

FF Option (Btu/s)

FF Vol lQ Time le-06 lT Time 14 20 Time

1.

lT Time 14 3Q Time 95000.

Time 15 1Q Time 95000.

Time 16 SQ Time 1 04500.

Tirr.e 14 6Q Time 104500.

Time 14 Valves & Doors Flew Open Close Valve va l ve Path Trip Trip Type Disch.

Description u

Vol.

If lV U2 RB Supply 19 2

1 15 2V U2 RB Exhaust 17 2

1 14 3V Ul RB Supply 20 2

1 16 4V Ul RB Exhaust 1 8 2

l 14 Valve/Dcor Types valve F Open O:;m Cls Full Flow Fl ow Flow Flow Cd Type Valve Area Trv Trv Open Char Char Char Char Mult Descript i on Op:;:ion (ft2)

Crv Crv Cd Coef A Coet B coef c Exp crv 1

RB isolation T OPEN 28.3 5T

1.

ELTN Volume Initial Conditions Total Vapor Liquid Relative Liquid Liq.

Vapor Liquid Vol Pressure Temp.

Temp.

Humidity Volume Comp.

Tracer Tracer (psia)

(F)

(%)

Fract.

Set Set Set def 14.7 104.

104.

90.

0.

NONE NONE NONE

Calculation No. QDC-7500-M-2341 Rev. 0 Attachment B Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA)- Oct 2016 File: C:\\Users~lwright\\Documents\\Exelon AST\\Quad Cities Drawdown\\Gothic\\Final\\QC. Drawdown Case1.GTH Initial Volume Fractions Vol Air def Field No.

1 Field No.

l Field No.

1 Gas 1 Gas 2 Gas 3

Gas 4 Gas s Gas 6

1.

a.

0.

Drop Fields -

Physical Parameters Dnom Geom Min Description (in)

Std Dev v Frac I Default 10.00393 I

1. l le-10 Drop Fields - General Options Unfm Temp Velocity Entrain-Dist Equil Equil ment I YES I NO I

NO I

YES Drop Fields -

Ag~lomeration Options Inter-Intra-Therm Turb Grav field field Diff FF Diff FF Coll FF YES YES YES YES YES Drop Fields - Deposition Options Impac-tion Grav FF Settle Therm FF Diff Turb FF Diff Thermo-FF phoresis YES YES YES YES NO Gas 7

0.

Diffusio-FF phoresis NO Page 827 of 839 27 FF

Calculation No. ODC-7500-M-2341 Hev. O Allachment B Jan/30/2019 10.46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon ASnQuad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH Gas No.

Symbol No!1cond.:nsin~1 C!.ases Type

1.:.d9ht Le:r..nc.rd -Jorn'!s Dia.meter (Ang) 1 I Air I

Air I POLY I

rn. 97 I 3.Gl7 I Ncnccnch!nsing Gases -

Cp/Vi ~;c

. Equations Gas Cp Equation (Req'Jired)

Vise.

f*:quat i on N::::.

r:n.in Tn*.ax Cp Tmin Tmax (R)

~ R}

(Et u /lbm - :n (F.)

(R) 1 I 7.00. I 30 00.

10.20 89163... 5. 13 0 I

I I

Type #

Desc ript ion 1

Cc n c: n~te NO NO 2

Ste r~l NO r*:o Sid i ng rnsulation NO t:O l':O NC t:o NO Temp.

Density Ccl:;.d.

Sp.

H <.~ at (F)

( lbm/ Et3)

(Btu/t:r

ft. - F)

(Btu/ 1 hm - F )

I 143. I

0. ~:) I

0. 21 Pararr:i:: t. c r s t.:/K

{K)

(OpLionali Vinco::;ity

( 1 b::1/ rt hr)

Page 828 of 839 28

97.

Calculation No. QDC-7500-M-2341 Rev. O Attachment B Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon AST\\Quad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH Temp.

(F)

Temp.

(F)

Temp.

(F)

Temp.

(F)

Trip 1

Material Type 2

Steel Density Cond.

(lbm/ft3)

(Btu/hr-ft-F)

I 490. I

25.

Material Type 3

Siding Insulation Density Cond.

(lbm/ft3)

(Btu/hr-ft-Fl I

2.5 I 0.02 Material Type 4

Roof Insulation Densit.y Cond.

(lbm/ft3)

(Btu/hr-ft-F)

I 4.5 I 0.02 Material Type 5

Built Up Roofing Density Cond.

(lbm/ft3 l (Etu/hr-ft-Fl I

70. I 0.1 Description Sense Variable LOCA Start TIME I

I I

I Sp. Heat (Btu/lbm-F) 0.11 Sp. Heat (Btu/lbm-F) 0.2 Sp. Heat (Btu/lbm-F) 0.4 Sp. Heat (Btu/lbm-F) 0.35 Component Trips Sensor 1 Loe.

Sensor 2 Loe.

Var.

Set Limit Point GE 1000.

Page 829 of 839 Delay Time

0.

29 Rset Cond Cond Trip Trip Type AND

Calculation No. QOC-7500-M-2341 Rev. O Attachment B Page 830 of 839 30 Jan/3012019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon ASnQuad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH Component Trips [cont. )

Trip Sens-e Sensor Sensor Var.

Set Delay Rs et Cond Cond Description Variable l !.oc.

2 Loe.

Limit Point Time Trip 7rip

':ype lnit.ial TIME GE

0.

MID RB Fan OH CONT VAR SC LT

-0.101

0.

OR RS F.J.n On CONT VAR SC GT

-0.099

0.

AND LDCA Time cmrr VAR 6C LT

0.

t~m Forcing Function Tables FF#

Description Ind. Var.

Dep. Var.

Points 0

Constant 0

lT SGT Flow Ind. Var.

Dep. Var.

s 2T OA Temperature Ind. Var.

Dep. Var.

4 3T Cond HTC Coefs Ind. var.

Dep. Var.

4 4T Pump Rm Cooler Ind. Var.

Dep. Var.

13 ST RB Valve Positi Ind. Vilr.

Dep. Var.

5 6T LOCA SP Temp Ind-var.

Dep. Var.

19 7T LOCA DW Temp Ind. var.

Dep. Vc.r.

4 BT SFP Evaporation Ind. Var.

Dep. Vc.r.

4 9T OA Humidi-cy Ind. var.

Dep. Var.

4 Function lT SGT Flow Ind. var.:

Dep. Var.:

Ind. Var.

Dep. Var.

Ind. Var.

Dep. Var.

0.

1000.

0.

1065.

0.

1102.

4000.

1e+06 4000.

Calculation No. QDC* 7500-M-2341 Rev. o Attachment B Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Oocuments\\Exelon AST\\Quad Cfties Orav;down\\Gothic\\rinal\\UC Drawdown Case1.GTH Ind. Vat"

0.

1000. 01 Ind. Var.

c.

999.91 Ind. Var.

100.

1 04.0l 11 l.

119.

12 7.

14 0.

500.

Funct i on 2T Ol\\ Ternpera::.c!'e I 1:d. Var. :

I r.A. *.;ar.

Dep. var.:

Dep. Var.

Ind. Var.

104.

93.

Function 3T Corid HTC Coefs tnd. Var.:

Dep. Var.:

1000.

1e+06 Dep. Var.

r:-.:::i. var_

fo'unct;. ion 4T Pump Rm Cooler Ind. Var. :

Df!p. Var.:

999.9 le+ 0 6 Dep. Var.

Ind. Var.

D.

83.4 116.6 219.

290.

400.1

iSS. 6 104.

108.

115.

123.

130.

150.

Dep. Var.

104.

Dep. Var.

Dep. 'J:ir.

93.

0.

1.

0.

119. 8 102.8 253.B

.; es..-;

Page 831 of 839 31

Calculation No. QDC-7500-M-2341 Rev. o Attachment B Jan/3012019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 Fite: C:\\Users\\jlwright\\Documents\\Exelon ASnOuad Cities Drawdown\\Go!hic\\Final\\QC Orawdown Case 1.GTH Ind. Var.

0.

1000.l le+OG lnd. Vai:-.

c_

107-1.

11 56.

1309.

1510.

20fi5.

5996.

16006.

26125.

41000.

lr.d. Va-::-.

c.

1000.l 5T RB Valve Positionpen

! nd. Var.:

Oep. Var. :

Dep. Var.

Ind. Var.

0.

l.

0.

Function GT LOCi'>. SP 7e:np Ind. Va'!:.,

Dep. Var.:

1000.

1060.

Dt"P* Var.

Ind~ "1ar..

98.

l.:t 7. 4 153.7 161.3 l GS. 9 172.

169.1

?.00. 1 201.

197.8 Function 7T LOCI\\ DW T e mp Ind. Var.:

Dep..

Var. !

10 00.

11(}6.

1203.

1406.

1600.

395.;_

11083.

21027.

31020.

I~d. Var.

150.

1000.

294.

1e+06 Dep. Var_

Dep. Va ::

0.

99.

l.-; B. 9 1::6.l 163.8 167.5 182.8 196.9 201.l 200.4 Dep. Var.

150.

294.

Page 832 of 839 32

Calculation No. QDC-7500-M-2341 Rev. 0 Attachment B Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) -Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon AST\\Quad Cities Drawdown\\Gothic\\Fina!\\QC Drawdown Case1.GTH Function ST SFP Evaporation Ind. Var.:

Dep. Var.:

Ind. Var.

Dep. Var.

Ind. Var.

Dep, Var.

0.

u.

1000.

0.

1000.1

1.

le+l*)

1.

Function 9T OA Humidity Xnd. Var.:

Dep. Var.:

Ind. Var.

Dep. Var.

Ind. Var.

Dep. Var.

CV lC 2C 3C 4C SC 6C 7C BC 9C lOC 11C 12C

0.

1000.01 Description DP N side DP s side DP E Side DP w Side Avg DP Refuel Time After LO DP 554 DP 595 DP 623 DP 647 DP 666 Total Leakage 0.9

0.

Fune.

Form mult mult mult mult sum sum mult mult mult mult mult sum 1000.

le+ OS Control Initial Value

0.

G.

(\\ v.

0.

0 ~

(\\ v.

0.

0.9

0.

variables Coeff.

G 27.7 27.7 27.7

27. 7

1.

27.7 27.7 27.7 27.7 27.7

1.

Coeff.

ao Min Max

0.

-le+32 le+32

0.

-le+32 le+32

0.

-le+32 le+32

0.

-le+32 le+32 O~

le+32 le+32

-1000.

-le+32 le+32

0.

-le+32 le+32

0.

-le+32 le+32

0.

-le+32 le+32

0.

-le+32 let-32

0.

-le+32 le+32

0.

-le+32 le+32 Page 833 of 839 33 Upd. Int.

Mull:.

0.

v.

0.

Calculation No. QDC-7500-M-2341 Rev. 0 Attachment B Jan/3012019 10:46:43 GOTHIC Version 8.2(0A} - Oct 2016 File: C:\\Users\\jh.vright\\Documents\\Exelon /\\STIOuad Cities Drawdown\\Gott1ic\\Final\\QC Drawdown Case1.GTH ii II Fur.ctioti C(H:1po n ents Con~rol Varlable lC DP N Nide: G~27

. 7 aO=O. min m-l.e32 ~JX=1.e32 Cl\\Jl t Y ~. G* (a1Xl*a2X2*......,,nXn),.::;. I) unused X:

Got h~c: s X: variable locc&:: i o n a: Mult.

ccef.

Dp jnc I eJSB I Control Vari rib l c 2c DPS si d e: G=27.7 a D=O. rnin ;

l. c 32 max*l.e32

m.;lt X:

Gothic_~,

X: Vari a bl e a: Mult.

N ~\\me locat..ion Dpjnc I c.JS? I

?t..:.:1::.:tion Ccr:1por:e:i t. s Control Var i abl e J C DP E Side: Gn27.7 a a~ o. min c - l. e l2 max=l.e32 X: Go t. hic _s N iltnC mult.

loc:at.io n Dpjnc I Ft:nction Compcmc rits Control Variable 4C a:

DP w Side: G=27.7 aQ;Q. min= - L. e 32 max~ l.eJ2 lf.Ul t:

Y ~ G*(a1x1~a2X2*... *anXnl, ao unused coef.

M ~ lt..

coef.

X: Gothic X: Variable a: Mult.

t!ame location coef.

Dpjnc I j, I

1. I

~. I Page 834 or 839 34

'lal ue Value Min.

Max V;.11 ue Value

- 1ed2 I l C*t 3 2 Min.

Max Value Value

le+32 I le ~3 2 Min.

Max V<i}"Jt!

Value

le+32 I le+32

Calculation No. QOC-7500-M-2341 Rev. O Attachment B Page 835 of 839 35 Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 Fite: C:\\Users\\j!wright\\Documents\\Exelon AST\\Quad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH Function Components Control Varia'.::lle SC Avg DP Refuel: G=l.O aO=O. min=-l.e32 max..,1.e32 sum Y~G*(aO+a1Xl+a2X2+.. ~+anXn)

X: Gothic s X: Variab::.e a: Mult.

Min.

Max Name location coef.

Value Value 1

Cvval (0) cvlC 0.25

-le+32 le+32 2

cvval(O) cv2C 0.25

-le+32 le+32 3

Cvval(O) cv3C 0.25

-le+32 le+32 4

cvval(O) cv4C 0.25

-le+32 le+32 Function Components Control Variable 6C Time After LOCA: G=l.O a0=-1000 mi::i.=-l.e32 max=l.e32 sum Y=G*(ao~alXl+a2X2+_.. +anXn)

X: Gothic s X: Variable a: Mult.

Min.

Max Name location coef.

Value Value 1 I Etime I CM I

1. I

-le+32 I le+32 F'unction Components Control Variable 7C DP 554: G=27. 7 aO=O. min=-1.e32 max=l.e32 mult Y=G*(a1Xl*a2X2*... *anXn), ao unused X: Gothic s X: Varia::ile a: Mult.

Min.

Max Name location coef.

Value Value 1 I Dpjnc I cJ65 I

.1... I

-le+32 I le+32

Calculation No. QDC-7500-M-2341 Rev. O Attachment B Page 836 of 839 36 Jan/30/2019 10:46:43 GOTHlC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exefon ASnQuad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case 1.GTH Function Components Control Variable SC DP 595:

G~l.O aO=O. min--1.e32 max=l.e32 mi.:lt Y=G*(a1Xl*a2X2*... *anX~), ao unused X: Gothic s X: Variable a: Mult.

Min.

Max Name locaticn coef.

Value Value l I

Jpjnc I cJ66 I

1. I

-le+32 I le+32 Function Components Control variable 9C DP 623: G=l.0 ao.. o. rnin--l.e32 max=l.e32 mult Y=G*(a1Xl*a2X2*... *anXnl, ao unused

X: Gothic - s X: Variable a: Mult.

Min.

Max Name location coef.

Value Value 11 Dpjnc I cJ67 I L I

-le+32 I le+32 Function Components Control Vari:e.!:le lOC DP 647: G=l.O aO=O. rnin=-1.e32 max-l.e32 mult Y=G*(a1Xl*a2X2*... *anXn), ao unused X: Gothic s X: Variable a: Mult.

Min.

Max It Name location coef.

Value Val ue 1 I Dpjnc I cJ68 l

1. l

-1e+32 I le+32 Function Ccrr.ponents Control Variable llC DP 666: G=l.O a0=0. min=-l.e32 max=1.e32 mult Y=G*(a1Xl*a2X2*... *anXnl, ao unused X: Gothic s X: Variable a: Mult.

Min.

Max tt Name locati:;:,:'l coef.

Value Value 1 I Dpjnc I cJ69 I

1. I

-le+32 I le+32

Calculation No. QDC-7500-M-2341 Rev. 0

Attachment B Page 837 of 839 Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 Fife: C:\\Users\\jlwright\\Documents\\Exelon AST\\Quad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH Time Dom 1

2 3

1 2

3 4

DT Min 0.001 0.001 0.001 Ti:r.e Solution Function Corr.ponents Control Variable 12C Total Leakage: G~l.O aO=O. min=-1.e32 max=l.e32 X: Gothic_s Name DT DT sum Y=G* (aO+alX1+a2X2+... +anXnJ wjncc Wjncc Wjncc iljncc Time Er.d X: Variable location cJ57 cJ58 CJ63 cJ64 Domain Data (seconds)

Print Graph Max Ratio Time Int Int

1.

L 999.9 100.

2.

1.

le+20 1000.

50.

2.

0.1

1.

4600.

SD.

2.

Solution Options a: Mult..

coef.

Gas Error Relax T DEr~AULT DEFAULT DEFAULT

.l..

l.

1.

Dump Int Imp Conv Pres Sol Pres Conv Pres Iter Min.

Max Value Value

-le+32 1e+32

-le+32 le+32

-le+32 le-1-32

-le+32 le*32 Ph Chng

.w Plow T Scale Shutoff

0.

DEFAULT DEFAULT

0.

DEFAULT DEFAULT

0.

DEFAULT DEFAULT Differ Burn Dom Method Limit Imp It:er Limit Method Limit Limit Scheme Sharp 1

2 3

Time Dorn 1

2 3

SEMI-IMP SEMI-IMP SEMI-IMP Tot. Pres.

Change

{psia)

DEFAlJLT DEFAULT DEFAULT

0.

l 1

DIRECT DIRECT DIRECT Control Limits Stm. Enth.

Change (Etu/lbrn}

DEFAULT DEFAULT DEFAULT Domain End Dt Controls ON ON ON

0.

l 1

FOU?

FOUP FOUP

--V Interface HT Shutoff--

Start End Ramp v Frac v Frac Exp DEF.l\\ULT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT DEFAULT

0.

37

Calculation No. QOC-7500-M-2341 Rev. O Attachment B Jan/30/2019 10:46:43 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon ASnQuad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH Run Options Option Restart Option Start Time (sec)

Parallel Processes Preprocessor Multithreading Revaporization Fraction Maximum Mist Density (lbm/ft3)

Drop Diam. From Mist (in)

Minimum H'l.' Coett. (B/h-ft.2-Fl Reference Pressure (psia)

Maximum Pressure (psial Forced Ent. Drop Diam. (in)

Vapor Phase Head Correction Kinetic Energy vapor Phase Liquid Phase Drop Phase Force Equilibrium Drop-Liq. Conversion QA Logging Debug Output Level Debug Starting Time Step Debug Time Step Frequency Restart Dump on CPU Interval (sec)

Pressure Initialization Iteration Pressure Initialization Convergenc Solver Command Line Options Restart:

Option Restart Data File Graphics Data File Restart Time Step #

Restart Time Control Graph Description l

0 IM & E Imbalance I

EM Setting

~mNE 0.0 1

YES DEFAULT DEF.U.ULT DEF.il.U-LT 0.0 IGNORE DEFAULT DEFAULT INCLUDE IGNORE INcr,r.JDE INCLUDE INCLvlJE IGNORE INCL"JDE ON 0

0 1

3600.

0 l.Ce-6 Options Setting Graphs Curve Number 2

3 I

EE I

4 I

Page B38 of 839 38 0

NEW Curve 5

Ops I

I

CatculaUon No. QDC-7500-M-2341 Rev. O Attachment B Page 839 of 839 39 Jan/30/2019 10 : ~6:43 GOTHlC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Oocuments\\Exelon ASnQuad Cities Orawdown\\Go:hfc\\Final\\QC Drawdown Case1.GTH Or.:!ph Cescdpt"ion TVl T'V 1

'TV**

T-.l5

-V>S 7'/i r.:g'.

TV':J i/l C T'.i: l n1 PR ~

P?.3 PH.\\

?R5 Ul Pressures PRG P!i-1 P::<a p~~

PRlO Refuel Floor Pr PR!.1 Refu"'l noor Di cvlC cv2C cv3C L!V*lC cvSC U2 Diffe!:'enti a l cv?C evec cv'.IC c vlOC cvllC FV57

vsa FVS J F'J,;.~

)f)

F"J~ 5

.-~*.l l f) cv l2*

Data files Inter-Outpu t.

Detail Fnnna t:

Name Type po late Files Level Opt: ion I QC Dra.,;do ;:n Cd s I

TIME I

YP.S

'SINGLE I F'ULL Entry Description 1

Flow Paths - Ta ble 2

Flow Paths - Table 2 Flow Paths T.Jble

CalculationNo.QDC7500M2341Rev.0 AttachmentC PageC1ofC12 Table1:ReactorBuildingVolumes Elev Description Volume Description Volume Height Aw Dh InertiaL (ft) U2 U1 (ft^3)

U2 U1 (ft^3)

(ft)

(ft^2)

(ft)

(ft) 554 1

21 TorusRoom 209000 1

6 Basement 324406 41 112963 11.5 34.5 2

22 SWCS2B 19438 3

26 SERHR2B 20467 4

23 NERHR2A 20467 6

24 NWCS2A 19438 20 39 HPCIRoom 35596 595 5

25 595GFA 253845 2

7 GroundFlr 253845 28 40825 24.9 26.25 623 7

27 RWCUHX/TKRm 12800 3

8 Mezzanine 211675 24.5 35240 24.0 21.75 8

28 623GFA 195430 30 ERWCUPump 1320 33 WRWCUPump 2125 647.5 14 34 U1647GFA 144497 9

MainFloor 144497 19 29636 19.5 21.5 U2647GFA 163050 4

163050 19 29636 22.0 21.5 666.5 16 36 666GFAE 123638 5

10 ReactorFlr 181146 24 35717 20.3 35.625 17 37 666GFAW 57508 690.5 19 690Refuel 1222452 11 RefuelFloor 1222452 47.25 80524 60.7 737.75 Roof Total 3472143 3472143 Note:PCFLUDvolumesfromTableD4ofRef.2.

VolNo.

CVNo.

PCFLUD Gothic

CalculationNo.QDC7500M2341Rev.0 AttachmentC PageC2ofC12 Table2:ReactorBuildingFlowPaths FPDescription FP#

Vol1 Vol2 W(ft)

H(ft)

A(ft^2)

Dh(ft)

L1(ft)

L2(ft)

InertiaL (ft)

Notes U2BasementGround 1

1 2

4 4

32 4

41 28 34.5 1

U2GroundMezzanine 2

2 3

19 20 380 19.5 28 24.5 26.25 U2MezzanineMain 3

3 4

19 20 285 14.6 24.5 19 21.75 U2MainReactor 4

4 5

19 20 380 19.5 19 24 21.5 U2ReactorRefuel 5

5 11 19 20 380 19.5 24 47.25 35.625 2

U1BasementGround 6

6 7

4 4

32 4

41 28 34.5 1

U1GroundMezzanine 7

7 8

19 20 380 19.5 28 24.5 26.25 U1MezzanineMain 8

8 9

19 20 190 9.7 24.5 19 21.75 U1MainReactor 9

9 10 19 20 380 19.5 19 24 21.5 U1ReactorRefuel 10 10 11 19 20 380 19.5 24 47.25 35.625 2

U1U2GroundFloor 11 2

7 3

7 21 4.2 147 147 147 U1U2Mezzanine 12 3

8 3

7 21 4.2 147 147 147 U1U2MainFloor 13 4

9 3

7 21 4.2 147 147 147 3

U1U2ReactorLevel 14 5

10 3

7 21 4.2 147 147 147 3

Notes:

1Therearetwo4'x4'hatchopeningsbetweenthebasementandgroundfloor.

2TheseflowpathsareassumedopenbasedonAssumption6.

3ThesedoorsarenormallyclosedsoasmallflowareaisusedintheGothicmodeltopreventflowthroughtheseopenings.

GeneralNote:FlowpathdimensionsarefromTableF1ofRef.2.

CalculationNo.QDC7500M2341Rev.0 AttachmentC PageC3ofC12 Table3:ReactorBuildingThermalConductors PCFLUD Gothic No.

Description Vol1 Vol2 A(ft^2) t(ft) htc TC#

Vol1 Vol2 A(ft^2) t(ft) 7 U2torus595 1

2 9491 2 ceiling 1

1 2

11449 2

8 U2torus595 1

2 646 2 ceiling 18 U2RHRB595 1

2 656 2 ceiling 21 U2RHRA595 1

2 656 2 ceiling 2 U2torusU1torus 1

6 2321 3 wall 11 1

6 5591 3

14 U2CSBU1CS 1

6 1014 3 wall 17 U2RHRBU1RHR 1

6 1413 3 wall 82 U2HPCIU1HPCI 1

6 843 3 wall 9 U2torusTB 1

adjTB 2186 2 ceiling 16 1

1 37655 1.5 15 U2CSBTB 1

adjTB 623 2 ceiling 33 U2CSATB 1

adjTB 623 2 ceiling 83 U2HPCITB 1

adjTB 1444 3 ceiling 1 U2torusground 1

adjgr 18882 3.7 wall 13 U2CSBground 1

adjgr 623 6 floor 16 U2RHRBground 1

adjgr 2069 4 wall 20 U2RHRAground 1

adjgr 3482 3.6 wall 32 U2CSAground 1

adjgr 3077 2 wall 80 U2HPCIground 1

adjgr 4646 3.6 wall 6 U2torusDW 1

DW2 9068 4 wall 26 1

1 9068 4

3 U2torusU2CSB 1

int 1862 internalwallsnotmodeled 10075 4 U2torusU2RHRA 1

int 1998 5 U2torusU2RHRB 1

int 1998 26 U2torusU2CSA 1

int 1862 81 U2HPCICSB 1

int 1440 4 wall 85 U2HPCItorus 1

int 915 wall 10 U2torusSP 1

SP2 32000 SP 36 1

1 32000 0

11 U2toruspipes 1

SP2 3559 pipe 37 1

1 7125 0

12 U2torusinspipes 1

SP2 92 pipe 19 U2RHRBpipes 1

SP2 1372 pipe 22 U2RHRApipes 1

SP2 1372 pipe

CalculationNo.QDC7500M2341Rev.0 AttachmentC PageC4ofC12 36 U2CSBpipes 1

SP2 365 pipe 52 U2CSApipe 1

SP2 365 pipe 29 U2595623 2

3 8577 1.3 ceiling 2

2 3

11098 1.25 30 U2595623 2

3 850 3.2 ceiling 34 U2595623 2

3 209 2 ceiling 35 U2595623 2

3 520 2 ceiling 28 U2595RWCU 2

3 942 2 ceiling 25 U2595U1595 2

7 3000 2.3 wall 12 2

7 3000 2.25 44 U2595DG 2

adjDG 532 1.5 wall 17 2

2 9643 1.5 24 U2595outside 2

adjOA 6206 2.5 wall 23 U2595TB 2

adjTB 2905 4 wall 27 U2595DW 2

DW2 4842 6 wall 27 2

2 4842 6

31 U2595pipes 2

SP2 793 pipe 38 2

2 793 0

40 U2623RWCU647 3

4 739 2 ceiling 3

3 4

7520 1.75 46 U2623647 3

4 6781 1.8 wall 43 U2623U1623 3

8 2574 2 wall 13 3

8 2574 2

39 U2623RWCU623 3

int 770 internalwallsnotmodeled 770 148 U2623RWCUpipe 3

heatload 297 pipe modeledasheatload 297 42 U2623outside 3

adjOA 6043 1.7 wall 18 3

3 7534 1.5 37 U2623RWCUTB 3

adjTB 410 4 wall 41 U2623TB 3

adjTB 1081 4 wall 38 U2623RBDW 3

DW2 680 8 wall 28 3

3 2174 8

45 U2623DW 3

DW2 1494 8 wall 49 U1RWCURWCU 3

int 330 internalwallsnotmodeled 821 50 U1RWCU623 3

int 491 47 U2623SFP 3

SFP2 2008 6.25 ceiling 41 3

3 2008 6

48 U2623pipes 3

SP2 444 pipe 39 3

3 444 0

59 U2647666 4

5 6869 1 ceiling 4

4 5

8801 1

60 U2647666 4

5 1932 3 ceiling 56 U2647U1647 4

9 1127 2 wall 14 4

9 1127 2

55 U2647outside 4

adjOA 4725 1.5 wall 19 4

4 6172 1.5 54 U2647TB 4

adjTB 1447 1.5 wall 57 U2647DW 4

DW2 1657 6.5 wall 29 4

4 1657 6

53 U2FD647 4

int 1417 internalwallsnotmodeled 1417

CalculationNo.QDC7500M2341Rev.0 AttachmentC PageC5ofC12 61 U2647D/Spool 4

SFP2 740 5 ceiling 42 4

4 2942 6

58 U2647SFP 4

SFP2 2202 6 wall 63 U2666U1666 5

10 1058 2.5 wall 15 5

10 1452 2.5 70 U2666U1666 5

10 394 2.5 wall 67 U2666refuel 5

11 6869 1.5 ceiling 5

5 11 10064 1.5 74 U2666refuel 5

11 3195 1.5 ceiling 62 U2666outside 5

adjOA 4527 1.6 wall 20 5

5 8499 1.5 68 U2666TB 5

adjOA 2205 1.5 wall 69 U2666outside 5

adjOA 1767 1.5 wall 64 U2666DW 5

DW2 926 5 wall 30 5

5 1838 5

71 U2666DW 5

DW2 912 5 wall 66 U2666D/Spool 5

SFP2 1159 3 wall 43 5

5 5063 6

73 U2666D/Spool 5

SFP2 1159 3 wall 65 U2666SFP 5

SFP2 1372 6 wall 72 U2666SFP 5

SFP2 1373 6 wall 90 U1torus595 6

7 9491 2 ceiling 6

6 7

11449 2

91 U1torus595 6

7 646 2 ceiling 96 U1RHRB595 6

7 656 2 ceiling 99 U1RHRA595 6

7 656 2 ceiling 84 U1torusground 6

adjgr 18882 3.7 wall 21 6

6 37655 1.5 93 U1CSAground 6

adjgr 623 6 wall 95 U2RHRground 6

adjgr 3482 3.6 wall 97 U1RHRAground 6

adjgr 2069 4 wall 108 U1CSBground 6

adjgr 3077 4.1 wall 144 U1HPCIground 6

adjgr 4646 3.6 wall 92 U1torusTB 6

adjTB 2186 2 ceiling 94 U1CSATB 6

adjTB 623 2 ceiling 109 U1CSBTB 6

adjTB 623 2 ceiling 147 U1HPCITB 6

adjTB 1444 3 ceiling 89 U1torusDW 6

DW1 9068 4 wall 31 6

6 9068 4

86 U1torusCSA 6

int 1862 internalwallsnotmodeled 10075 87 U1torusRHRA 6

int 1998 88 U1torusRHRB 6

int 1998 103 U1torusCSB 6

int 1862

CalculationNo.QDC7500M2341Rev.0 AttachmentC PageC6ofC12 145 U1HPCICSA 6

int 1440 146 U1HPCItorus 6

int 915 98 U1595623RWCU 7

8 115 2 ceiling 7

7 8

10435 1.25 105 U1595623RWCU 7

8 942 2 ceiling 106 U1595623 7

8 8577 1.3 ceiling 107 U1595623RWCU 7

8 72 2 ceiling 110 U1595623 7

8 209 2 ceiling 111 U1595623 7

8 520 2 ceiling 102 U1595DG 7

adjDG 290 1.5 wall 22 7

7 9697 1.5 101 U1595outside 7

adjOA 6502 2.5 wall 100 U1595TB 7

adjTB 2905 4 wall 104 U1595DW 7

DW1 4842 6 wall 32 7

7 4842 6

51 U1623RWCU647 8

9 115 1 ceiling 8

8 9

7707 1.75 115 U1623RWCU647 8

9 739 2 ceiling 120 U1623647 8

9 6781 1.8 ceiling 124 U1623RWCU647 8

9 72 1 ceiling 117 U1623outside 8

adjOA 6034 1.7 wall 23 8

8 7525 1.5 112 U1623RWCUTB 8

adjTB 410 4 wall 116 U1623TB 8

adjTB 1081 4 wall 113 U1623RWCUDW 8

DW1 680 8 wall 33 8

8 2174 8

119 U1623DW 8

DW1 1494 8 wall 114 U1623RWCU623 8

int 770 4 wall internalwallsnotmodeled 1502 118 U1RCWURWCU 8

int 161 3 wall 122 U1623RWCURWCU 8

int 205 wall 123 U1623RWCU623 8

int 366 121 U1623SFP 8

SFP1 2008 6.25 ceiling 44 8

8 2008 6

130 U1647666 9

10 6869 1 ceiling 9

9 10 8801 1

131 U1647666 9

10 1932 3 ceiling 127 U1647outside 9

adjOA 4725 1.5 wall 24 9

9 6172 1.5 126 U1647TB 9

adjTB 1447 1.5 wall 128 U1647DW 9

DW1 1657 6.5 wall 34 9

9 1657 6

125 U1647RWCU647 9

int 1417 internalwallsnotmodeled 1417 132 U1647D/Spool 9

SFP1 740 5 ceiling 45 9

9 2942 6

129 U1647SFP 9

SFP1 2202 6 wall

CalculationNo.QDC7500M2341Rev.0 AttachmentC PageC7ofC12 137 U1666refuel 10 11 6869 1.5 ceiling 10 10 11 10064 1.5 143 U1666refuel 10 11 3195 1.5 ceiling 133 U1666outside 10 adjOA 4527 1.6 wall 25 10 10 8499 1.5 139 U1666outside 10 adjOA 1767 1.5 wall 138 U1666TB 10 adjTB 2205 1.5 wall 134 U1666DW 10 DW1 926 5 wall 35 10 10 1838 5

140 U1666DW 10 DW1 912 5 wall 136 U1666D/Spool 10 SFP1 1159 3 wall 46 10 10 5064 6

142 U1666D/Spool 10 SFP1 1159 3 wall 135 U1666SFP 10 SFP1 1373 6 wall 141 U1666SFP 10 SFP1 1373 6 wall 75 Refueloutside 11 adjOA 22830 0.25 wall 50 11 11 22830 0

79 Refueloutside 11 adjOA 34000 0.25 ceiling 51 11 11 34000 0

76 RefuelTB 11 adjTB 662 0.25 wall 49 11 11 662 0

78 RefuelU1DW 11 DW1 1452 8.75 floor 47 11 11 1452 8

77 RefuelU2DW 11 DW2 1452 8.75 floor 48 11 11 1452 8

Note:PCFLUDwallthicknessandsurfaceareafromAppendixAofRef.2.

CalculationNo.QDC7500M2341Rev.0 AttachmentC PageC8ofC12 Table4:ReactorBuildingHeatLoads TotalHeatLoad(BTU/s)

U2 HeatLoad U1 HeatLoad Elev Room LOCA nonLOCA WiFi Volume BTU/s Volume BTU/s 554 Torus 16 16 0.2 1

430 6

58 CSA 51.6 2.7 CSB 50.1 23.4 RHRA 154 2.7 RHRB 153.8 8.7 HPCI 4.3 4.3 595 GFA 41.5 45.2 0.2 2

41.7 7

45.4 623 RWCUHX 21.1 21.1 0.2 3

98.5 8

102.4 GFA 77.2 77.2 ERWCU 0

3.9 WRWCU 0

0 647 RWCUFD 0

0 0.2 4

32 9

32 GFA 31.8 31.8 666 GFAE 16.7 14.2 0.2 5

24.1 10 21.6 GFAW 7.2 7.2 690 Refuel 35.8 35.8 11 71.7 Note:PCFLUDheatloadsfromTableI4ofRef.2andWiFiloadsfromRev.0BofRef.2 PCFLUD Gothic

CalculationNo.QDC7500M2341Rev.0 AttachmentC PageC9ofC12 Table5:ECCSRoomCoolerHeatRemovalCapacity CoolerCapacity(BTU/s)

InletT(F)

CS RHR HPCI Totalw/HPCI Totalw/oHPCI 104 14.7 27 9.2 92.6 83.4 108 21.1 38.8 119.8 110 15 111 25.8 47.5 146.6 115 32.2 59.2 19.7 202.5 182.8 119 38.6 70.9 219 120 24.7 123 44.7 82.2 253.8 125 29.4 127 51.1 93.9 290 130 55.6 102.1 34.2 349.6 315.4 135 38.9 140 70.6 129.6 43.6 444 400.4 145 48.1 150 85.6 157.2 52.8 538.4 485.6 Note:IndividualcoolercapacitiesfromTable4ofRef.2.

CalculationNo.QDC7500M2341Rev.0 AttachmentC PageC10ofC12 Table6:SurfaceandAtmosphericPressuresDueToWind Parameter SummerConditions WinterConditions Windspeed 24 mph 24 mph 2112 fpm 2112 fpm Airdensity 0.0718 lb/ft3 0.0875 lb/ft3 VelocityP(Pv) 0.2662 inwg 0.3244 inwg 0.0096 psi 0.0117 psi SurfaceP AtmP SurfaceP AtmP Face Cp Ps(inwg)

P(psi)

Ps(inwg)

P(psi)

E 0.8 0.2130 14.7077 0.2595 14.7094 W

0.43 0.1145 14.6959 0.1395 14.6950 N/S 0.4 0.1065 14.6962 0.1298 14.6953

CalculationNo.QDC7500M2341Rev.0 AttachmentC PageC11ofC12 Table7:SBGTSFlowRateDuringValveOpening Ksbgts 130.6 Kvlv 0.19 Dpfan 15.8 inwg Avlv 3.14 ft^2 tvlv 69 s openangle degrees Kvlv Ktot V(fpm) t(s)

Q(cfm) 0 1.0E+100 2.0E+100 1E46 0.0 0.0 30 108 346.2 855.6 23.0 2686.5 40 29 188.2 1160.4 30.7 3643.6 50 11 152.2 1290.3 38.3 4051.6 60 4.5 139.2 1349.2 46.0 4236.5 70 1.5 133.2 1379.3 53.7 4330.9 80 0.52 131.3 1389.5 61.3 4363.1 90 0.19 130.6 1393.0 69.0 4374.1 0

500 1000 1500 2000 2500 3000 3500 4000 4500 5000 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 FlowRate(cfm)

Time(s)

CalculationNo.QDC7500M2341Rev.0 AttachmentC PageC12ofC12 Table8:RBVentilationSystemLossCoefficients Supply Exhaust FanFlow 95000 cfm 104500 cfm FanSP 8 inwg 8 inwg VlvK 0.38 0.38 VlvA 28.3 ft^2 28.3 ft^2 VlvDP 0.27 inwg 0.32 inwg DuctDP 7.73 inwg 7.68 inwg DuctA 28.3 ft^2 28.3 ft^2 Elev Flow K

Flow K

ft cfm cfm 690 23750 176.1 23750 174.8 666 10050 983.5 10050 976.4 647 9500 1100.7 9500 1092.7 623 21300 219.0 21300 217.4 595 12700 615.9 12700 611.4 554 17700 317.1 17700 314.8 Total 95000 95000

Calculation No. QOC-7500-M-2341 Rev. o Atlact1ment D Jan/30/2019 10:52:50 GOTHlC Version 8.2(0A) - Oct 2016 File: C*\\Uscrs\\jlwright\\Documents\\Exelon AST\\Quad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH 140

~

130

~

J ro a;

0..

E Q)

I-120 110 U2 Temperatures 1V1 TV2 1V3 TV4 TVS 100 '---'--......_..L-~......L....-'--'--'--'-------'----'--"'--....__.__i_~-'-~--'--'----'---'--'

0 2

Time (s)

GDTI llC 8 2DA) :!0Jan201 9 10:46.36 3

4 5

X1e3 Page D 1 of 040 50

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~

ti!

-ro Qj

0.

E ID I-U1 Temperatures 1\\16 1V7 1VB TV9 1V10 120 115 110

~---::'- -

. -~

105 100..._...__~~---..-.._.__,_........... _.__.__.___._~_.._~_._I~_....-~___..__.__.'--~-,__.__.

0 2

3 Time (s) 4 5

X1e3 GOTHIC 6 2 QA} 30Jan20i9-10:46:36 Page D2 of D40 51

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~

i

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E Q)

I-120 115 110 105 Refuel Floor Temperature TV11 100~~..__~~.....___.__.___.__.___,___.__,.__.L.--...___..___.__.___.__.__..__,__.___.___,~

0 2

3 4

Time (s)

X1e3 G07HIG B.2fQA) 30.Ja12C19-10 46 36 Page 03 of 040 52

Calculation No. QOC-7500-M-2341 Rev. 0 Attachment D Jan/30/2019 10:52:51 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exeron AST\\Quad Citles Dra1,vdown\\Gothic\\Frnal\\QC Drav;down Caset.GTH 4

U2 Pressures PR1 PR2 PR3 PR4 PR5 14.85 14.8 Ill 14.75

.iii 3

Q)

(/)

IJ'J Q)

14. 7 0:

14.65 14.6

-*-*-*-***-*-*-*-*-.?

~- - * - *---* - **- -.. !

0 GOT!ilC e 2tQAl 30Jan2::J 19-:0.:6:36

\\'*-...... ~ *-

2 Time (s) 3 4

5 X1e3 Page 04 of 040 53

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14.85 14.8 cu

14. 75

'iii E:

~

J

(/)

Vl

~

14.7 Q..

14.65 14.6 U1 Pressures PR6 PR7 PR8 PR9 PR10

-*-*-*-*-*-*-*-*-*-*f 0

2 GOTH1C B 2<0A} 30Jan2013-10:46:36

~............ ...... ".... '.... ~......................

-**-..... _ *- -.~............................................. _.,..

3 4

Time (s) 5 X1e3 Page 05 of 040 54

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-ro

"(jj 8

~

(/)

~

0.

14.85 14.8 14.75 14.7 14.65 14.6 Refuel Floor Pressure PR11 0

GOTHIC 8.2(Ql\\ 30Jrin?.Oi9-i0:46:36

---------~---

2 3

4 Time (s) 5 X1e3 Page 06 of 040 55

Calculation No. QDC-7500-M-2341 Rev 0 Atlachrnenl 0

.Jan/30/2019 10:52:53 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jh.vright\\Documents\\Exelon ASnQuad Cities Drawdovm\\Golt1ic\\Final\\QC Drav.idown Case1.GTH 7

Refuel Floor Differential Pressures cv1C cv2C cv3C cv4C cv5C 2

2 Time (s)

GO:HIC 8 2(0Al 3CJan2019*lO 46.36 3

4 5

X1e3 Page 07 of 040 56

Calculation No. QDC-7500-M-2341 Rev. O Attachment D Jan/30/2019 10:52:53 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon ASnQuad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH 8

Oi 3

2-n..

0 3

2 U2 Differential Pressures cv7C cv8C cv9C cv1 OC cv11 C

-1

.__...._....__.,__.__.__.___.~.__..._....__,_.......__.__._____..___,'--.__...__....__.___.__.___.___.__.

0 2

Time (s)

GOTHIC 8.2(QA 30Jan2019*10:46:36 3

4 5

X1e3 Page 08 of 040 57

Calculation No. QDC-7500-M-2341 Rev. O Attachment D Jan/3012019 10:52:54 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Oocuments\\Exeron Asnauad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case1.GTH 9

0.5 0

-0.5

-1

-1.5 Leakage Flows FV57 rV58 FV63 FV64 i

i ' I

~~~~IMW '~t

\\ i

\\

~ \\.

\\ \\

\\. *, **,

~...

~ -.. _ -*-*-*-----

-2 ~~_._~~~~~...._...__._~~~~~~_._--~~~.__...._...._~--_.___.

0 2

Time (s)

GOTHIC B2(QA) 3-0Jan2019 - 10 ; ~ G :36 3

4 5

X1e3 Page 09 of 040 58

Ca~culation No. QDC-7500-M-2341 Rev. O AHacllmcnt 0 Jan/30/2019 10:52:54 GOTH!C Version 8.2(QA) - Oct 2016 file: C:\\Users\\jlwright\\Documen!s\\Exelon ASnOuad Cities Drawdown\\Gothic\\~inal\\QC Drawdown Case1.GTH 10 4

2 VJ E g

0

~

0 u::

-4 SBGTS and Total Leakage Flows FV15 FV16 cv12C

,------------------~---

l l

I I

I

..._~~~~__.~.__~_.___.__,____.~.__..__L_.~'~..__.....__,_......__.___,_----~'-1 2

3 4

5 Time (SJ X1e3 GOTHIC 8 2iC1-\\l 30Jar.2019-10.46 36 Page DI O of 040 59

Calcu!atio11 No. ODC-7500-M-2341 Rev. 0 Attachment D Jan/3012019 10.59:22 GOTHIC Version 8 2(0A) *Oct 2016 File: C:\\Users\\jlwright\\Oocumcn:s\\Exelon ASTIQuad Cities Drav1down\\Gothic\\Final\\OC Drawdown Case2.GTH 140

~

130

~

l ro Q;

Q_

E (l)

~

120 110 U2 Temperatures TV1 TV2 TV3 1V4 TVS

.-=-_-:---_:.-_--:-_ 7:.. :-:: -:: -:: *-=.

~.,....

~.................. --**

100.___..__~~~~~~~---...__._....._~--......... ___....__.~.__..__....__.___,__.___._____.__,

0 2

3 4

5 Time (s)

X1c3 GOllliG 8 2(0A) ;)Q Jan2019-~0 :.55 : 33 Page 011 of040

Calculation No. QDC-7500-M-2341 Rev. O Attachment D Jan/30/2019 10:59:23 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon ASnQuad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case2.GTH 2

~

J 7§ Q)

0.

E Q) f-120 115 110 105 U1 Temperatures TV6 TV7 TV8 TV9 1V10

!//......... **********

/

j

.~ 7

.................. 4--**-"'""'

V'.~...---**-****-**

f_,l 100.__..._.....__.__..__,___.__.__,____.___.____.~'---"'---'---'---1.---L--_.__.__.___.__.___.__.'--'

0 2

3 4

5 Time (s)

Xle3 GOTHIC 8.2 QA) 30Jan2019*10:55:33 Page 012 of 040 2

Calculation No. QDC-7500-M-2341 Rev. O Attachment D jan/3012019 10 :59:23 GOTHIC Version 8.2(QA}

Oct 2016 File: C:\\Users\\jlwright\\Oocuments\\Exelon AST\\Ouad Cities Drawdown\\Gothic\\Final\\QC Drawdovm Case2.GTH 3

lL

J ro Qi

a.

E (l)

I-120 115 110 105 Refuel Floor Temperature TV11 100'--.1---'--...___,__.__,__.__.__.__.___.__,_____.___.__.__.__,___.,~__,'--.__.l..-..L-~

0 2

Time (s)

GO'TIHC 8 2(QAl 20Jar 201!3-I 0*55:33 3

4 5

X1e3 Page 013 of 040 3

Calculation No. QDC-7500-M-2341 Rev. O Attachment D Jan/3012019 10:59:24 GOTHIC Version 8.2(QA} *Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon ASnQuad Cities Drawdown\\Gothic\\Fina!\\QC Drawdown Case2.GTH 4

14.85 14.8 cu 14.75

u;

~

I fl'l

~

14.7 a:

14.65 14.6 U2 Pressures PR1 PR2 PR3 PR4 PR5 L

0 G07HIC 8 2(QA) 30Jan2019-1C5533

~-. *-.......

2 Time (s)

- ***- o*..... *I -~--* '°'"'"°*~.. _.., **.... _. * --,*~ _.._. ~......._

3 4

5 X1e3 Page 014 of 040 4

Calculation No. QDC-7500-M-2341Rev.0

Attachment D Jan/30/2019 10:59:24 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon ASnQuad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case2.GTH 5

U1 Pressures PR6 PR7 PR8 PR9 PR10 14.85 14.8 ro-14.75

'ii) 8

~

J r.n I./) e 14.7 a..

14.65 14.6 0

GOTHIC 6.2 QA 30Jan2019-10:55:33

........ *--............. _., -- ** --** **-**................ ""*-** **-** ~- ** *--.. **-

2 3

4 Time (s) 5 X1e3 Page 015 of 040 5

Calculation No. QDC-7500-M-2341 Rev. O Attactiment D Jan/30/2019 10:59:25 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon AST\\Quad Cities Drawdown'.Gothic\\Final\\QC Drawdown Case2 GTH 6

ro

'ii) s Q}

3 Ul Ul Ill n...

14.85 14.8 14.75 14.7 14.65 14.6 Refuel Floor Pressure PR11 0

GO ntc 82£0A) 3aJar.201 :i rn:ss 33 2

3 Time (s) 4 5

X1e3 Page 016 of 040 6

Calculation No. OOC-7500-M-2341 Rev. O Attachment D Jan/30/2019 10:59:25 GOTHIC Version 8.2(QA)

Oct 2016 File: C:\\Users\\1lwrigbt\\Documents\\Exe!on ASnOuad Cities Drawdown\\Golhic\\Hnal\\OC Drawdown Case2.GTH Refuel Floor Differential Pressures cv1C cv2C cv3C cv4C cvSC 2

0 - -- *-.. - **- -- *-.. ~

~......... -- ~... ~...........,,.. -_,...;

"....... **-.. * -....... ~........ " '..,,,._..

.,.... *~....

-1

.___._~_._-J.~.___......__,__,__. __

..__......__,__.....__..~,___.___,___,___J.~'---'--'---'---L---'

0 2

Time (s)

GOTHIC 8 2(QAJ 3GJan2019-IO;:i5:J3 3

4 5

X1e3 Page 017 of D40 7

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U2 Differential Pressures Oi

~

.S n..

0 cv7C cv8C 2

I a~----...

-1 0

GOTHIC 8.WJA! 30Jan20i9-10 55 33 cv9C cv10C 2

cv11C 3

4 5

Time (s)

X1e3 Page 018 of 040 8

Calculation No. QDC* 7500-M-2341 Rev. O Attachment D Jan/30/2019 10:59:26 GOTHIC Version 8.2{QA)

Oct 2016 File. C:\\Uscrs\\jlwright\\Documents\\Exeron AST\\Quad Cities Drav1down\\Gothic\\Final\\QC Drmvdown Case2.GTH FV57 FV58 FV63 FV64 05 0

-0.5

-1

-1.5

-2

.___.___.__.._~~..__.....__..__,_~~-'--_.__.__.___.~.___._.......... _,_ __

~ __,___.____._ _ _,___...........J 0

2 Time (s)

GOTHIC i:12QA)30Jan2019-10.55.33 3

4 5

X1e3 Page 019 of 040 9

Calculat!on No. QDC-7500*M-2341 Rev. 0 Attachment D Jan/3012019 10:59:26 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon ASnOuad Cities Orawdown\\Gotttic\\Final\\QC Drawdovm Case2.GTH 10 SBGTS and Total Leakage Flows FV15 FV16 cv12C 1

I I

I

-6..__...__.....__._......___,____......_....__~_.___.__.___,~,__....__......___.__.__....__..__...___._.......___.__i.__,

0 2

3 4

5 Time (s)

X1e3 GOTHIC 8 2(0A) 3CJan2019-:0 55 33 Page 020 of 040 10

Calculation No. QDC-7500-M-2341 Rev. 0 Attachment D Jan/30/2019 11 :04:33 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon AST\\Quad Cities Drawdown\\Gothic\\Final\\QC Orawdown Case3.GTH U2 Temperatures TV1 TV2 TV3 TV4 TVS 160 140

~

120

~

l co a; 0..

E 100 Q)

I-80 60 0

GOTHIC 8.2 QA 30Jan2019-11:00:57 2

Time (s)

- - - - '... ~...................... 04 ****** ~ **** ' **** **~......

3 4

5 X1e3 Page 021 of 040 11

Calculation No. QDC-7500*M-2341 Rev. 0 Attachment D Jan/30/2019 11 :04:34 GOTHIC Version 8.2(QA) - Oct 2016 Fife: C:\\Users\\jlwright\\Documents\\Exelon Asnauad Cities Drawdown\\Gcthic\\Final\\QC Orawdovm Case3.GTH 2

80 75 70 65 U1 Temperatures 1V6 TV7 TVS TV9 TV1 O 60'--~...___,__....._~~-'---'-_,___,,.__.__,.__.__..__..L-.....__,__.__.__.__.___.__,___,__,L...--.I 0

2 Time (s)

GOTHIC B.2'0.A. 30Jan2019-t !CO 57 3

4 5

X1e3 Page 022 of 040 12

Calculation No. QDC-7500-M-2341 Rev. O Attachment D Jan/30/2019 11 :04:34 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users~lwright\\Documents\\Exeton ASnQuad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case3.GTH 3

~

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(l)

0.

E a.>

I-80 75 70 65 Refuel Floor Temperature.

TV11 60'----'---'-......__,_-L.-J..-.J. ___.___..___.__._......__,_.....r...-J..-.J.~L--L--'--'---'--'---1-._l............I 0

2 Time (s)

GOTHIC 8.2(0A} 30Jan2019-11 :00:57 3

4 5

X1e3 Page 023 of 040 13

Calculation No. QOC-7500-M-2341 Rev. 0 Attachment D Jan/3012019 11:04:34 GOTHfC Version 8.2(QA) *Oct 2016 Ffle. C:\\Users\\j1wright\\Docurnents\\Exelon ASnQuad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case3.GTH 4

U2 Pressures PR1 PR2 PR3 PR4 PR5 15.1 15 co 14.9

'iii s Q.) :s t/l

[fl (l) 14.8 a:

14.7 14 6 0

GOTHIC !l 2(Qi\\/ 3D.Jari2019*1LC0,57 2

3 Time (s) 4 5

X1e3 Page 024 of 040 14

Ca!cu!ation No. QDC-7500-M-2341 Rev. 0 Attachment D Page 025 of 040 15 Jan/30/2019 11 :04:35 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exe!on ASnQuad Cities Drawdown\\Gothfc\\Final\\QC Drawdown Case3.GTH 5

U1 Pressures PR6 PR7 PRS PR9 PR10 15.1 15 ro 14.9

'ii)

E:

<l,)

~

I,/)

U) 14.8

(]J a:

5 Time (s)

X1e3 GOlHIC 82{0A 30Jan2019-1100.57

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cu

'iii

..9:

~

(/)

~

Cl.

14.85 14.8 14.75 14.7 14.65 14.6 Refuel Floor Pressure PR11 0

GOTHIC S.2 Q A} 30.Jan2019*11 00.57 2

3 Time (s) 4 5

X1e3 Page 026 of 040 16

Calculation No. QDC-7500-M-2341 Rev. 0 Attachment D Jan/30/2019 11 :04:35 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Oocurnents\\Exelon ASnouad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case3.GTH 7

Cl.

0 6

4 2

Refuel Floor Differential Pressures cv1C cv2C cv3C cv4C cv5C 2

Time (s)

GOTHIC 8.2{0A) 30Jan2019-11.00.57 3

4 5

X1e3 Page 027 of 040 17

Calculation No. QDC-7500-M-2341 Rev. 0 Attachrnenl D Jan/30/2019 11 :04.36 GOTHIC Version 8.2(QA} - Oct 2016 File: C:\\Users\\j!wright\\Documents\\Exelon AST\\Ouad Cities Drawdown\\Gott1ic\\f-inal\\QC Drawdown Case3.GTH 8

U2 Differential Pressures cv7C cv8C cv9C cv10C cv11C 4

2 01------

-2....__._......___,___._---'.___,__.__,___._~.___.__.__.___._~.__~......__.____..~

..___.___,__ L__J 0

2 Time (s) 3 4

5 X1e3 Page 028 of 040 18

Calculation No. QDC-7500-M-2341 Rev. O Attachment D Jan/30/2019 11 :04:36 GOTHIC Version 8.2(0A) *Oct 2016 File: C:\\Users\\jlwright\\Oocurnents\\Exelon AST\\Quad Cities Drawdown\\Gothic\\Final\\QC Drawdown Case3.GTH 9

Leakage Flows FV57 FV58 FV63 FV64 0.5 0

-0.5

-1

-1.5

\\

\\ *'..,..

-.~..._, ----.. _ ---.

-2

.___..__...._~_....__.~....._...__.__._-L.__.~.__..._....__.__.__.___,..__...___...._......__.__.___,,__,

0 2

Time (s)

GOTHIC B.2(0A) 30JanWHJ-11 :0057 3

4 5

X1e3 Page 029 of 040 19

Calculation No. ODC-7500-M -2341 Rev. 0 Attachment D Jan/30/2019 11 :04 :37 GOTHlC Version 8.2(QA}

Oc:t 2016 Fi!e: C:\\Users\\j!wright\\Oocuments\\Exelon ASnOuad Cilies Drawdown\\Gothic\\Final\\QC Drawdown Case3.GTH 10 6

4 2

(/)

-E

9

~

0 u::

2

-4 SBGTS and Total Leakage Flows FV15 FV16 cv12C r------------ - - ------ -

I I

I I

I 2

3 4

Time (s)

GO H !IC B 2(f.lA) JOJan20 19-11.00:57 5

X1e3 Page 030 of 040 20

Calculation No. ODC-7500-M-2341 Rev. o Attachment ()

Jan/30/2019 11 :09:26 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documen!s\\Exelon ASnauad Cities Drawdown\\Gct11ic\\Final\\QC Drawdown Case4.GTH 160 140 fS 120 OJ en ill 0..

E 100 (l)

I-80 U2 Temperatures TV1 1V2 TV3 TV4 TV5 6 01~~--'~~...._......__.__..___,,~.__...__.__.___.___.___,.__..__...__.__.1 _1_~~~-~~

0 2

3 4

Time (s)

GOTH!C B.?(QA) 3CJar.2019-1 I 05.23 5

X1e3 Page 031 of 040 21

Calculation No. QOC-7500-M-2341 Rev. O Attachment D Jani30/2019 11 :09:27 GOTHIC Version 8.2(QA) - Oct 2016 Fil~ C:\\Users\\jlwright\\Documcnts\\Exelon ASnOuad Cities Orawdown\\Golhic\\Finai\\QC Drav1down Case4.GTH 2

U 1 Temperatures TV6 1V7 1V8 TV9 1V10 80 75 70 eo~l ~__.~~~__..___._*_j~..._...__._~__.___...___.__~-_.___._~..__...___.__._............ __.'--,_____,

0 2

Time (s)

GOTHIC 8.2/QA) 30Jan2:; lg.i i :05:23 3

4 5

X!e3 Page 032 of 040

Ca!cu!ation No. QDC-7500-M-2341 Rev. O Attachment D Jan/30/2019 11 :09:27 GOTHIC Version 8.2(QA)

Oct 2016 File: C:\\Users\\j!wright\\Documents\\Exelon AST\\Quad Cities Orawdown\\Gott1ic\\Final\\QC Drawdown Case4.GTH 3

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0.

E OJ I-80 75 70 65 Refuel Floor Temperature 1V11 60~-'-~~~~~~_.__~~--'---'----'~~~_..__.__.___.~.__---~_.___,____.___,

0 2

GOTHIC 8 2(QA 30Jan2019* 11 :05:23 3

Time (s) 5 X1e3 Page 033 of 040 23

Calculation No. QOC-7500-M-2341 Rev. O Attachment D Jant30/2019 11 :09:27 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Oocuments\\Exelon AST\\Quad Cities Orawdown\\Gothic\\Final\\QC Orawdown Case4.GTH U2 Pressures PR1 PR2 PR3 PR4 PR5 15.1 15 1..:,

14.8

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X1e3 Page 034 of 040 24

Calculation No. QOC-7500 M~2341 Rev. 0 Attachment D Page 035 of 040 25 Jan/30/2019 11 :09:28 GOTHIC Version 8.2(QA) *Oct 2016 Fife: C:\\Users\\jlwrlght\\Oocuments\\Exefon AST\\Quad Cities Drawdown\\Go\\l1ic\\Final'lQC Drawdown Case4.GTH 5

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Calculation No. QDC-7500-M-2341 Rev. O Attachment D Jan/30/2019 11 :09:28 GOTHIC Version 82(0A) - Oct 2016 Fi ~c: C:\\Users\\jlwrigt1t\\Oocuments\\Exelon AST\\Quad Cities Drawdown\\Golhic\\Final\\QC Drawdown Case4.GTH 6

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X1e3 Page 036 of 040 26

Calculation No. QOC-7500-M-2341 Rev. O Attachment D

.1an/30/2019 11 :09:28 GOTHIC Version 8.2(QA} - Oct 2016 Flle: C:\\Users\\jlwright\\Documents\\Exelon AST\\Quad Cities Orawdown\\Goth1c\\Final\\QC Drawdown Case4.GTH 7

Refuel Floor Differential Pressures cv 1 C cv2C cv3C cv4C cv5C 4

2 2

j GOTHIC 8.2 OA' 30Jan2019-11.05 23 Time (s) 3 4

5 X1e3 Page 037 of 040 27

Calculation No. QDC-7500-M-2341 Rev. O Attachment D Page D38 of 040 28 Jan/3012019 11 :09:29 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exclon ASnQuad Cities Drawdown\\Gothic\\i:inal\\QC Drawdown Case4.GTH 8

U2 Differential Pressures cv7C cv8C cv9C cv10C cv11C 4

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Calculation No. QDC-7500-M-2341 Rev. 0 Attachment D Jan/30/2019 11 :09:29 GOTHIC Version 8.2(QA) *Oct 2016 File* C:\\Users\\jl\\vright\\Documents\\Exeron AST\\Quad Cities Drawdown\\Gothic\\Final\\QC Drawdovm Case4.GTH 9

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4 5

X1e3 Page 039 of 040 29

Calculation No. QDC-7500-M-2341 Rev. O Attachment D Jan/30/2019 11 :09:30 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwrighl\\Documents\\Exelon AST\\Quad Cities Drawdown\\Go!hic\\Finai\\QC Drawdown Case4.GTH SBGTS and Total Leakage Flows FV15 FV16 cv12C r---------------- - -

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X1e3 Page 040 of 040 30

Calculation No. QDC-7500-M-2341 Rev. O Attachment E Page E1 of E3 EXELON TRANSMITTAL OF DESIGN INFORMATION (TOOi)

[8J SAFETY RLATED Originating Organization.

TOOi No.: QDC-18-030 0 NON-SAFETY RELATED t8l Exelon Nuclear Page: 1 of 3 0 REGULATORY RELATED D Other (specify)

TOOi Addressed To:

John Wright jlwright@enercon.com Enercon Station: Quad Cities Unit(s): 01 & 02 System Designation(s): MS/SBGT/Secondary Containment

Subject:

Increase MSIV Leakage Limits cQ_ -Y,

. Prepared By: Jason Hawman I t-

~

Date: 12/17/2018 Reviewed By: Tom Woicik I

rJl.1..M-Jl.-

Date: 12/17/2018 "f I f

~

Status of Information:

l8l Approved for Use D Unverified Method and Schedule of Verification for Unverified TOOis:

Description of Information: Reactor Building Fan, SBGT, and building configuration parameters.

Purpose of Issuance: Input Parameters for Quad Cities Units 1 &2 Secondary Containment Drawdown Analysis Limitations: On1y for use with project CORP-17-0070, BWR MSIV Optimization, associated with OCR 626084, Increase MSIV Leakage Limits, and calculation QDC-7500-M-2341, Increase MSIV Leakage Limits.

Distribution: Dianne Behrens, Quad Cities records management Page 1of3

Calculation No. QDC-7500-M-2341 Rev. O 1\\tlachment E Page E2 of E3 TODI #QDC-18-030 The following items are provided at the request of Enercon:

l. The Reactor Building Supply Fans, l (2)-5703-A/B/C, supply 50,000 cfm at 8 inWg each. (Reference Joy (vendor code Jl27) drawing DWGV D2100A-l)

2. The Reactor Building Exhaust rans, 1(2)-5704-NB/C, supply 55,000 cfm at 8 inWg each. (Reference attached photo of fan label plate from 2-5704-B)

3. The EDG must be ready to accept load within 13 seconds of the ECCS initiation signal and to accept full load within 40 seconds. Within 40 seconds after the initiating signal is received, all automatic and permanently connected loads needed to recover the unit or maintain it in a safe condition are returned to service. The SGTS fans are not shed after a LOOP and automatically restart after the DG output breaker closes. Therefore, the SGTS fans will start within 40 seconds. The time delay for the standby train of SBGT to start is 25 seconds after the primary train failed to start or trips. (Reference UFSAR 8.3.1.6.1, TS B 3.8.1, TS B 3.6.4.3, Calculation QDC-6700-E** l 503 Rev. 11.

4. There is no time delay to trip the RB ventilation fans or start closure of the Reactor Building ventilation isolation valves after a LOCA signal. Reactor Building Emergency Dampers will close immediately on reactor low level or high drywell pressure and isolate the supply and exhaust air. This will also trip the fans. (Reference UFSAR 9.4.7.2, drawing DWGC 4E-l 387B)

5. There are no backdraft dampers on the RB supply and exhaust fans. There are only isolation dampers on the Reactor Building Ventilation supply and exhaust fans. (Reference drawings DWGC M-371 and M-373 Sheet I)

6. The normal Site operating practice is for equipment hatches in the floors of elevations 623', 647', and 666' are open. The 690'6" hatch is normally open but is closed/tarped during an outage. (Reference RP-QC-500-100 I) This is evident by inspection from lhe ground floor (elevation 595') and looking up through the aligned hatches (20' x 21 ')to the superstructure. This is the path for fuel from

ground to the Refuel Floor (elevation 690'6) during non-outage periods.

7. Personnel access Fire Doors between the Units arc normally open on elevations 595' (#150) and 623' (#167). Fire Doors between Units are normally closed at elevations 647' (#l 75A) and 666' (#183).

8. The Spent Fuel Pool temperature is maintained below 125°F during normal operation but could reach l 50°F during refueling outages. (Reference UFSAR 9.1.3.l)

9. The Reactor Building is concrete from the basement up to the 690'6" elevation.

Potential leakage locations are the insulated metal panels on the 690'6 refueling floor elevation. The other theoretical source of air in-leakage would be the Y2 Trackway (railroad airlock) door on the ground floor (595') elevation. Once set of the airlock doors is always closed during normal operacion. The V2 Trackway airlock is the preferred path for reactor fuel movement to and from the Site and is verified both doors shut after each evolution.

Page 2of3

JOY MAN-OFACTURlN f*_,t.:"11 PHJLr..DELPHIA, OHIO AXOVA~E FAN..

~ :-~~ E5.

~00~-~~~ --- --~=-~-~-

Calculation No. QDC-7500-M-2341 Rev. 0 Attachment F Page F1 of F21 DRAWDOWN TEST CASE

1. PURPOSE The purpose of this attachment is to determine the Reactor Building (RB) pressure response following a RB isolation during normal operation at Quad Cities and the resulting drawdown time for test conditions.

2. INPUTS The inputs used in this attachment are the same as those from Section 2 in the body of the calculation except input 6 is not used since no failure of the primary SBGT system is assumed for the test case.

3. ASSUMPTIONS The following are the assumptions from the body of the calculation which are modified for the test case to minimize the drawdown time calculated for test conditions during normal operation:

1. The outside air temperature, initial RB temperature and wind speed are equal to the conditions for LOCA Case 1 since these result in the shortest LOCA drawdown time, i.e. 93 F outside air temperature, 104 F initial RB temperature and no wind.

2. Normal operating heat loads are assumed for both units since both units are assumed to be in normal operation prior to and during the test.

3. No credit is assumed for ECCS pump room cooler heat removal in either unit since the ECCS pumps would not be operating during normal operation, which is consistent with the normal operation heat loads assumed above.

4. The initial RB/SC pressure prior to RB isolation is at the maximum vacuum pressure of 0.7 inwg vacuum maintained by the RB ventilation systems during normal operation, which will result in the minimum drawdown time. (Ref. 11)

5. The primary SBGTS fan starts immediately after RB ventilation system isolation occurs with no time delay. There is no time delay to load the primary SBGT system onto the DG bus since no LOOP is assumed for the test case and there is no time delay to start the standby SBGT system since no failure of the primary SBGT system is assumed for the test case. The SBGTS fan in Unit 1 is assumed to be operating for the test case but the results are also applicable to the SBGTS fan in Unit 2 due to the similarities between the two units.

6. Credit is assumed for secondary containment out-leakage during periods of positive RB pressurization since this will reduce the RB pressurization and result in a shorter drawdown time.

7. Heat transfer from external Reactor Building walls to adjacent areas and to the external environment will be credited since this will reduce the drawdown time. The temperature adjacent areas will be assumed equal to the outside air temperature.

Calculation No. QDC-7500-M-2341 Rev. 0 Attachment F Page F2 of F21

8. The effect of solar heat gain on the RB roof is neglected since this may not be present during test conditions.

9. Constant SP and DW temperatures of 98 F and 150 F, respectively, are assumed for both units. These SP and DW temperatures are consistent with the 104 F initial RB temperature assumed above.

10. Evaporation from the SFP for the test case will be calculated based on an assumed SFP temperature of 100 F and a RB relative humidity (RH) of 50%. The SFP temperature during normal operation would typically be lower than the 125 F assumed for LOCA conditions and the RB relative humidity greater than the 0% RH used to calculate the LOCA evaporation rate, resulting in a lower SFP evaporation rate and shorter drawdown time.

4. REFERENCES The references are the same as those used in the body of the calculation.

5. METHOD OF ANALYSIS The Case 1 GOTHIC model for LOCA conditions was modified for the assumptions from Section 3 of this attachment for the assumed test conditions during normal operation. The following sections describe the changes made for the test case model and the changes made to the GOTHIC model are shown in Appendix F1.

RB Flow Paths The forward loss coefficients of the RB leakage flow paths (FP# 57, 58, 63, and 64) are set equal to the assumed loss coefficient of 2.85 used for the reverse loss coefficient to allow out-leakage during periods of positive RB pressurization. (Assumption 6)

RB Thermal Conductors Conductor surface options 4 and 13 were modified to use a specified temperature equal to the Case 1 outside air temperature of 93 F instead of a specified heat flow of zero, i.e. an insulated boundary condition, to allow heat transfer from the Reactor Building to adjacent areas and to the external environment. (Assumption 7) Conductor surface options 7, 8 and 15 were modified to use constant temperatures of 98, 150, and 93 F, respectively. (Assumptions 8 and 9) The surface area of conductor 40 for the torus in the Unit 1 basement was also set equal to the surface area of conductor 36 for the torus in the Unit 2 basement. A small value was used for the surface area of conductor 40 in the Case 1 LOCA model to conservatively prevent heat transfer to the cooler torus in non-LOCA Unit 1.

RB Heat Loads The heat rate for GOTHIC heaters H1 through H5 were modified to use the corresponding Unit 1 heat loads from Table 4 of Attachment C since these represent the normal operating heat loads.

(Assumption 2)

Calculation No. QDC-7500-M-2341 Rev. 0 Attachment F Page F3 of F21 RB Coolers The heat removal rate for GOTHIC cooler 12C was set equal to zero to prevent heat removal by the ECCS pump room coolers. (Assumption 3)

SBGTS GOTHIC forcing function 1T was modified so that the SBGTS flow linearly increases from zero immediately after RB isolation at 1000 seconds to 4000 cfm at 37 seconds after isolation.

(Assumption 5)

RB Ventilation System GOTHIC trips 3 and 4 used to control the RB exhaust fan components were modified to maintain an initial RB pressure of -0.7 inwg prior to RB isolation. (Assumption 4)

SFP Evaporation Evaporation from the SFP for the test case will be calculated based on an assumed SFP temperature of 100 F and a RB relative humidity (RH) of 50%. (Assumption 10) At these conditions, the SFP evaporation rate at the initial RB temperature of 104 F is:

=

95 + 0.425=

1353 1036.67 1.935 0.5 2.1895 + 0.425 0

= 104.8 /

Where:

WSFP = SFP evaporation rate, lb/hr A = SFP surface area = 33 x 41= 1353 ft2 (Ref. 2 Table D1) hfg = latent heat of evaporation at SFP temperature

= 1036.67 BTU/lb at 100 F (Table 3 Ref. 33 Chapter 6)

Pw = saturation vapor pressure at SFP temperature

= 1.935 inHg at 100 F (Table 3 Ref. 33 Chapter 6)

Pa = saturation pressure at room air dew point

= 0.5*2.18 = 1.09 inHg at 104 F with 50% RH (Table 3 Ref. 33 Chapter 6)

V = air velocity over water surface = 0 fpm assuming no forced air circulation Multiplying the evaporation rate calculated above multiplied by an activity factor of 0.5 (Ref. 34 page 4.6) to account for the quiescent pool surface conditions and converting to lb/s gives a flow rate of 0.015 lb/s for the SFP flow boundary conditions. (BC# 7F and 8F) The assumed SFP temperature of 100 F and corresponding saturation pressure of 0.95 psia were also used for these boundary conditions in the test case.

Calculation No. QDC-7500-M-2341 Rev. 0 Attachment F Page F4 of F21

6. RESULTS The GOTHIC results for the test case are shown in Appendix F2. RB isolation occurs at 1000 seconds on each of these plots. Figure F1 below shows the average differential pressures on the refueling floor for the test case. The differential pressure increases rapidly from the initial RB pressure of -0.7 inwg and becomes positive. However, the positive RB pressure increases to less than 0.05 inwg under the assumed test conditions and again becomes negative after about 60 seconds. The RB pressure reaches -0.25 inwg at 450 seconds and continues to decrease, reaching a relatively constant value of -0.6 inwg at 3600 seconds after RB isolation.

7. CONCLUSION The differential pressure inside the Quad Cities Reactor Building predicted by the GOTHIC model after RB isolation during normal operation, will be less than -0.25 inwg with respect to the outside air pressure after a drawdown time of 450 seconds (7.5 minutes) under the assumed test conditions and with the assumed RB in-leakage.

8. APPENDICIES F.1 GOTHIC Input File Changes for Test Case F.2 GOTHIC Results for Test Case

Calculation No. QDC-7500-M-2341 Rev. 0 QJ U) cu u

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Calculation No. QDC-7500-M-2341 Rev. 0 AppendlxF1 Page F6 of F21 File Comparison: Double entries Indicate differences.

I Current File: C:\\Users~lwrlght\\Documents\\Exelon ASnOuad Cities Drawdown\\Gotiic\\Final\\QC Drawdown Test Case.GTH

\\Compare File: C:\\Users~lwright\\Oocuments\\Exelon ASnQuad Cities Drawdown\\Gothlc\\Flnal\\QC Drawdown Case1.GTH Jan/30/2019 12:06:04 GOTHIC Version 8.2(QA) - Oct 2016 Flow Paths - Table 3 Flow Fwd.

Rev.

Critical Exit Drop Homog.

Path Loss Loss Comp.

Flow Loss Breakup Flow Coeff.

FF Coeff.

FF Opt.

M:xlel Coeff.

Model Opt.

1 2.85 2.85 OFF OFF

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Calculation No. QOC-7500.M-2341 Rev. O Appendix F1 Page F7 of F21 File Comparison: Double entries Indicate differences.

I Current File: C:\\Users~twrlght\\Oocuments\\Exelon Asnauad Cities Drawdown\\Gothi::\\Final\\QC Drawdown Test Case.GTH

\\Compare File: C:\\Users\\jlwright\\Documents\\Exelon ASnauad Cities Orawdown\\Gol,fc\\Final\\QC Drawdown Case1.GTH Jan/301201912:06:04 G OTHIC Version 8.2(QA\\ - Oct 2016 Flow Paths - Table J (cont.)

Plow Fwd.

.Rev.

Critical bit Drop HOlllOg.

Path Loss Loa a Comp Fb\\I Loss Breakup Flow Coeff.

PF C~tf.

PP Opt.

Modal Coef:.

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44 611.4 611.4 OF?

O?P

0.

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lnit.

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Description A.

Opt a

O;>t Type (ft2)

T. IVI I/X l

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J s

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x Ul 647- '"

2 10 J

1 8801.

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x 10 Ul 666 - Retl.lel 10 2

l1 l

s 10064.

104.

x 2

Calculation No. ODC-7500..M-2341 Rev. O Appendix F1 Page F8 of F21 File Comparison: Double entries Indicate differences.

I Current File: C:\\Users~lwright\\Oocuments\\Exelon ASnauad Cities Drawdown\\Gothl:\\Flnal\\QC Drawdown Test Case.GTH

\\Compare File: C:\\Users\\jlwright\\Oocuments\\Exelon Asnauad Cities Drawdown\\Got1ic\\Flnal\\QC Drawdown Case1.GTH Jan/3012019 12:06:04 GOTHIC Version 8.2l0Al-Oct 2016

°TM%'1Ul COnducton (cont.)

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Pipes J

6 3

7 16 Ht.

104.

I

O Ul Base -

TonJs G

s 6

10 15

/3:2000.

104.

I

\\11!1*06 41 U2 62l

SPP l

2 l

g 11 2008.

104.

I

'2 U2 647 SFP 4

l 4

9 11 2942.

104.

I

4)

U2 6'6

SFP 5

1 5

9 11 500.

104.

I 44 Ul 621 SPP 8

2 8

12 11 2008.

104.

I 45 Ul 647

SP;>

9 1

9 12 11 2942.

104.

I 4S Ul '66

SFli' 10 l

10 u

11 5064.

104.

I 47 ltefuel Ul DW 11

)

ll 8

12 1452.

194.

I 48 Refuel

111 DW 11 3

11 11 12 1452.

1:>4.

I 49 Rofuol

TB 11 l

11 ll ll 6'2 li>4.

I 50 let fuel *Out*lde 11 l

11 14 13 228JC.

1~4.

I Sl Refuel

Roof 11 2

11 15 14 l4000.

1)4.

I 52 Ul SFP

Refuel 11 l

11 l7 llSl.

11>4.

I Sl Ul SPP

Refuel 11 J

11 g

17 lJSl.

104.

I 3

Calculation No. QOC-7500-M-2341Rev. 0 Appendix F1 Page F9 of F21 File Comparison: Double entries Indicate differences.

I Current File: C:\\Users\\jlwrighl\\Documents\\Exelon ASnOuad Cities Drawdown\\Gothlc\\Final\\QC Drawdown Test Case.GTH

\\ Compare Flle: C:\\Users\\jlwrlght\\Documents\\Exelon ASnauad Cilies Drawdown\\Gothlc\\Final\\QC Drawdown Case1.GTH Jan/3012019 12:06:04 GOTHIC Version 8.2(QA) - Oct 2016 Data Files File Inter-Output Detail Format.

Name Type pol ate Files Level Option 1 I

/QC.D:rawdown Tea

\\QC D:rawdown Caa I

TIME I

YES I SINGLE I FULL I Component Trips Trip Sense Sensor Sensor Var.

Set Delay Description Variable l Loe.

2 Loe.

Limit Point Time l

LOCA Start TIME GE 1000.

0.

2 Initial TIME GE

0.

3 RB Fan Off CONT VAR SC LT

/-0.701

0.

>-0.101 4

RB Fan On CONT VAR SC GT

-o. 6119

0.

\\-0.0U 5

LOCA Time CONT VAR GC LT

0.

Fluid Boundary Conditions - Table 1 Press.

Temp.

Flow s

J ON OFF BC#

Description (psia)

FF (F)

FF (lbm1s)

FF p

0 Trip Trip lP N Wall Ambient

14. 7 1

2T N

N 2F N Wall.Ambient

14. 7 l

2T Vl310 N

N 3P S Wall Ambient 14.7 1

2T N

N 4F S Wall Ambient

14. 7 l

2T Vl310 N

N SP Exhaust Ambient 14. 7 1

2T N N 6F Exhaust Ambient 14.7 1

2T vl~lO N

N 7F U2 SFP Evap

/0.95

/100

/0.015 BT N

N

)1.HS

)125

)0.07 BF Ul SFP Evap 0.95 100 0.015 BT N

N

\\l.945

\\125

\\0.07 9P E Wall Ambient 14. 7 l

2T N

N lOF E Wall Ambient 14.7 l

2T vlelO N

N llP W Wall Ambient

14. 7 2T N

N 12F W Wall Ambient 14.7 2T vlelO N

N Cooler/Heater Heater On Off

?low Flow Heat Heat Rs et Trip 4

3 Elev.

(ft) 595.

595.

G90.5 690.5 595.

595.

Cooler Vol.

Trip Trip aate Rate Rate Rate Phs Ctrlr Description (CFM)

F?

(Btu/a)

FF Opt Loe lH U2 Basement l

1

/58.

VTI 1

\\00.

Cond Trip 1

5 4

Cond Type AND AND OR AND AND

Calculation No. QDC-7500-M-2341 Rev. 0 Appendix F1 Page F10 of F21 File Comparison: Double entries indicate differences.

I Current File: C:\\Users\\jlwright\\Documents\\Exelon Asnauad Cities Orawdown\\Gott:ic\\Flnal\\QC Drawdown Test Case.GTH

\\Compare File: C:\\Users~lwright\\Oocuments\\Exelon Asnauad Cities Orawdown\\Gothtc\\Flnal\\QC Drawdown Case1.GTH Jan/301201912:06:04 GOTHIC Version 8.2CQA) - Oct 2016 Cooler/Heater (cont.I Heater On O!f Flow Fl..:nt

'Keat Heat Cooler Vol.

Trip Trip JI.ate RUe Rate Rate Phs Ctrlr ti Description II (C:FM)

?F (Btu/s) pp Opt Loe 2H U2 Ground Flr 2

l

/45.4 VTI l

)41.7 lH Ul Mezzanine J

1 102.4 VTI 3

\\98.S 4H U2 Main Plr 4

l

32.

VTI 4

SH U2 Reactor Fl s

1

/21.6 VTI s

\\24.1 6H Ul Basement 6

l SS.

VTI 6

iH Ul Ground Flr 7

1 45.4 VTI 7

Bit Ul Mezzanin3 8

1 102. 4 VTI 8

9H Ul l'lain Flr l

.:12.

VTI 9

lOH Ul Reactor P'l 10 l

21. 6 vrx 10 UH Refue 1i ng Fl r 11 l

71. 7 vrx 11 12C Pump Rm Coo 1 e l

l

/D.

4T VTE 1

\\1.

Conductor surface Options - Table 1 surf Heat Cnd/

Sp Na.t Opt T:ransfer Ni;nnin.il Cnv C:nd Cnv en*..

Description Option Value FP Opt Opt HTC Opt 1

Interior tlal l Direct JT DLH-PM VERT SURF 2

Int Ceiling Di.:rect JT DLM-FH FACB DOtlN l

Int Floor Dire et JT DLH*FM FACE UP 4

In11ulat:ed

/Sp Temp

/93.

\\Sp Heat

\\O.

5 Torus Direct JT OLM-FM HORZ CYL I

6 Pipes Direct JT DL>1*FM HORZ CYL 7

LOCA SP Te111p Sp Temp

/98.

I

)1*

)n 8

LOCA DW Teaip Sp Temp HO.

\\1.

\\7r 9

LOCA SPP Temp Sp Temp us.

10

.Normal SP Temp Sp Temp

98.

11 Normal DW Temp Sp Temp 150.

12 Normal SFP Tecap Sp Temp 125.

/Sp Teuip

/93.

ll Turbine Bldg

\\Sp Heat

\\0.

I l4 Outside Ai:r Sp Te111p 9J.

i 15 Roof Sol-Air T Sp Teaip

/93.

\\129.

5 Fo't Cnv Opt.

OP'F OFF OPP' OFF OPP'

Calculation No. QDC-7500-M-2341 Rev. O Appendix F1 Page F11 of F21 File Comparison: Double entries Indicate differences.

I Current File: C:\\Users\\jlwrlght\\Documents\\Exelon Asnauad Cities Drawdown\\Gotlic\\Final\\QC Orawdown Test Case.GTH

\\ Compare File: C:\\Users\\jlwright\\Oocuments\\Exelon Asnauad Cities Orawdown\\Golhlc\\Final\\QC Orawdown Case1.GTH Jan130/2019 12:06:04 GOTHIC Version 8.2(QA)- Oct 2016 Function lT SGT Flow Ind. Var.:

Dep. var.:

Ind. Var.

Dep. Var.

Ind. Var.

Dep. Var.

0.

1000.

o.

/1000.01

0.

/1037.

4000.

\\1065.

\\1102.

le+06 4000.

6

Calculation No. QOC-7500-M-2341 Rev. o Appendix F2 Jan/3012019 12:10:43 GOTHIC Version 8.2(QA)- Oct 2016 File: C:\\Users\\jlwrlght\\Documents\\Exelon Asnauad Cities Drawdown\\Gothlc\\Flnal\\C,C DraWdown Test Case.GTH

~

.3 cu....

Cl> a.

E

~

U2 Temperatures TV1 lV2 TV3 TV4 TVS 120 115

//

110 105

.:/

-.-*-:.::.=-.:=::= *.:: *.=.. ::.: =.*::.;-=--.:.;.-:..!..-:..:..-...:..:-..:.=-

i

~

'l

.~

//;/.. -**

100----------------------._.....__. ___.__ _________________ _.... __ _.....____......_.

0 2

lime (s) 3 4

5 X1e3 GOTHIC 6.2 QA 30Jan2019*12:06:46 Page F12 of F21 7

Calculation No. QDC-7500-M-2341 Rev. O Appendix F2 Jan/30/2019 12:10:43 GOTHIC Version 8.2(QA)-Oct 2016 File: C:\\Users~twrlght\\Documents\\Exelon ASTIQuad Cities Drawdown\\Gothic\\Final\\0*~ Drawdown Test Case.GTH Cl>.....a e IU Q.

E

~

U1 Temperatures TV6 TV7 1V8 1V9 1V10 125r----~~------~----------------~---------------.

120 115

.//_.......-************-***********"*********"****""""****************"****************

110 105

/ /~*:=~-:::~---------*

!,,,.";'.,,.,;' ~-**-.. *-**-*"-*****"-"..... _... _.. _.. -... -**-*

i //

! l'/........ ***

1ool--..__.__.__.__i__.__.__L-.J.__.--L--L--L~--L--J.-'--'--'-~_,_-'--"--"--I 0

2 Time (s) 3 4

5 X1e3 GOTHIC 8.2 QA 30Jan2019*12:06:46 Page F13 of F21 8

Calculation No. QDC-7500-M-2341 Rev. o Appendix F2 Jan/3012019 12:10:44 GOTHIC Version 8.2CQA)

Oct 2016 FUe: C:\\Use1s\\jlwrfght\\Oocumenls\\Exelon ASTIQuad Cities Drawdown\\Gothlc\\Flnal\\QC Orawdown Test Case.GTH 120

~

115 e

J l E

110

~

105 Refuel Floor Temperature TV11 100,__.__.__.__._..__.__.__.__.__.__.__..--L_,__,__.__.__.__.__,_-'-_,__,__,_-'

0 2

Time (s)

GOTHIC 8.2 OA 30Jan2019-12.06;46 3

4 5

X1e3 Page F14 of F21 9

Calculation No. QOC-7500-M-2341 Rev. O Appendix F2 Jan/30/2019 12:10:44 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Oocuments\\Exelon ASnOuad Cities Drawdown\\Gothlc\\Final\\QC Drawdown Test Case.GTH 14.73 14.71 14.69 14.67 14.65 14.63 U2 Pressures PR1 PR2 PR3 PR4 PR5

\\

f'\\.

"""'~..... ".""} "******..........

~""""Nl~~il.d*<~*,.,*.*~:*~*:~.-~:*~*:~--**.......................................................

--... ~*- * -*- * - * -*- * -*-*-*-*-*-

0 1

2 3

4 Time (s)

GOTHIC 8.2 QA 30Jan2019-12:06:46 5

X1e3 Page F15 of F21 10

Calculation No. QDC-7500-M-2341 Rev. O Appendix F2 Jan/30l2019 12:10:44 GOTHIC Version 8.2(QA)

Oct 2016 File: C:\\Users~lwright\\Oocuments\\Exelon Asnauad Cities DraWdown\\Gothlc\\Final\\QC Drawdown Test Case.GTH 5

14.73 14.71 14.69 14.67 14.65 14.63 U 1 Pressures PR6 PR7 PR8 PR9 PR10

\\

~*: I\\

............. "l'llt*.. **f'*

i,'*,., '*, ****-****************************************-************************************....

'tlN'!fllM"""rN";nhJ'M ** '**

. -*-. -*-* ~ *-*-*-* -*-*-* -*-

- -**~-**--**-.. -***-**-**-.. -*.--.. -... *-***-**-*

i 0

2 3

4 Time (s)

GOTHIC 8.2 QA 30Jan20t9-12:<l6:46 5

X1e3 Page F16 of F21 11

Calculation No. QDC-7500-M-2341Rev.0 Appendix F2 Jan/301201912:10:45 GOTHIC Version 8.2(0A) *Oct 2016 File: C:\\Users\\jlwrlghl\\Oocuments\\Exelon ASnauad Cities DraWdown\\Gothic\\Flnal\\QC Orawdown Test Case.GTH 6

cu

'iii.s

~

J

~

0..

14.7 14.68 14.66 14.64 14.62 14 6 Refuel Floor Pressure PR11 0

1 GOTHIC 8 2 QA 30Jan2019-t2:06:46 2

3 nme (s) 4 5

X1e3 Page F17 of F21 12

Calculation No. QDC-7500-M-2341 Rev. O Appendix F2 Jan/30/2019 12:10:45 GOTHIC Version 8.2(QA)-Oct 2016 File: C:\\Users~lwrlght\\Documents\\Exelon ASnauad Cities Drawdown\\Gothic\\Final\\QC Drawdown Test case.GTH Refuel Floor Differential Pressures cv1 C cv2C cv3C cv4C cv5C 0.5 0.25 Ci

~

-0.25

~

a.

0

-0.5

-0.75 2

Time (s)

GOTHIC B.2 QA 30Jan2019*12:06:46 3

4 5

X1e3 Page F18 of F21 13

Calculation No. QOC-7500-M-2341 Rev. o Appendix F2 Jan/30/2019 12:10:45 GOTHIC Version 8.2(QA) - Oct 2016 File: C:\\Users\\jlwright\\Documents\\Exelon Asnauad Cities Drawdown\\Gothic\\Flnal\\QC Drawdown Test Case.GTH U2 Differential Pressures cv7C cv8C cv9C cv1 OC cv11 C

~

-0.25 g

a.

0

-0.5

-0.75 1

2 Time (s)

GOTHIC 8.2 QA 30Jan2019-12:06:46 3

4 5

X1e3 Page F19 of F21 14

Calculation No. QDC-7500~M-2341 Rev. O Appendix F2 Jan/30/201912:10:46 GOTHIC Version 8.2(QA)- Oct 2016 File: C:\\Users~lwright\\Documents\\Exelon ASnQuad Cities Drawclown\\Gothlc\\Flnal\\QC Drawdown Test Case.GTH 0.5

~

-0.5 0 u:

-1

-1.5 Leakage Flows FV57 FV58 FV63 FV64

~ r I I

\\ i ' \\

m.-------t \\

\\

\\,,

2 GOTHIC 82 QA 30Jan2019-12:06:46 3

4 Time (s) 5 X1e3 Page F20 of F21 15

Calculation No. QDC-7500-M-2341Rev.0 Appendix F2 Jan/3012019 12:10:46 GOTHIC Version 8.2(QA)

Oct 2016 File: C:\\Users\\jlwrlght\\Documents\\Exelon ASnQuad Cities Drawdown\\Gothic\\Final\\QC Drawdown Test Case.GTH 10

-2

-4 SBGTS and Total Leakage Flows FV15 FV16 cv12C

~----------------------

H

\\

i ***...

i ******...

I 2

3 4

Time (s)

GOTHIC B.2(0 30Jan2019-12:06:46 5

X1e3 Page F21 of F21 16

ML19064B370

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