ML042080475

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Calculation VYC-2314, Revision 0 and Ccn 01, Minimum Containment Overpressure for Non-LOCA Events
ML042080475
Person / Time
Site: Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date: 07/02/2004
From: Slifer B
Entergy Nuclear Operations, Entergy Nuclear Vermont Yankee
To:
Office of Nuclear Reactor Regulation
References
BVY 04-058
Download: ML042080475 (51)
v • d • e


Text

2, Docket No. 50-271 BVY 04-058 Exhibit 2 Vermont Yankee Nuclear Power Station Proposed Technical Specification Change No. 263 - Supplement No. 8 Extended Power Uprate Response to Request for Additional Information VYNPS Calculation VYC-2314, Revision 0 and CCN 01 Minimum Containment Overpressure for Non-LOCA Events

This document contains Vermont Yankee proprietary information. This information may not be transmitted in whole or in part, to any other organization without permission of Vermont Yankee.

VY CALCULATIONaiTLE PAGE VYC-2314 0

NIA N/A VY Calculation Number Revision Numbcr Vendor Calculation Number Revision Number

Title:

Minimum Containment Overpressure for Non-LOCA Events QA Status:

0D SC El NNIS E OQA Operating Cycle Number*

N/A The Operating Cycle Number should only be entered here if the results of the calculation only apply during a specific operating cycle otherwise enter "N/A".

Calculation Supports A Design Change/Specification?

0D Yes El No VYDC 2003-008 VYDC/MMflM/Spec No.

Calculation Done as a Study Only? El Yes [9 No Implementation Required? 0 Yes El No Safety Evaluation Number.

N/A Superseded Calculation Number, Title and Revision:

N/A For Revisions: List CCNs, IlWs, or SAs incorporated/superseded by this revision:

N/A Computer Code(s):

N/A Are there open items in this calculation/revision?

El Yes Dl No Review and Approval: (Print and Sign Na

)e)

Preparer B. C. Slifer E

N1 Date:

I

° 3 Interdiscipline Reviewer(s): N/A U t.

Date:

IndependentReviewers(s): PB.Perez

-6 Date: C)°%/0o3/0.O Approved: B. R.-Hobbs 7 ?52 a.

Accepted (only for AP 0017 calculations perfonned by vendors) 0 NIA

  • Datt:

eV I Z:

I Date:

Final Turnover to DCC (Section 2):

I )

All open items, if any, have been closed.

2)

Implcmcntation Confirmation (Section 2.3.4)

E Calculation accurately reflects existing plant configuration, (confirmation method indicated below)

El Walkdown E As-Built input review El Discussion with Total No. Pages in Package (including all attachments) 20 (Print Name)

OR El N/A, calculation does not reflect existing plant configuration

3)

Resolution of documents identified in the Design Output Documents Section of VYAPF 0017.07 has been initiated as required (Section 2.3.6,2.3.7)

I

/l Printed Name Signature Page I of I I Pages*

Date

  • For calculations performed using AP 0017 this is the number of pages in the body of the calculation.

For vendor calculations, this is the number of pages of AP 0017 forms added.

(Title page, review forms, data sheets, 50.59, etc.)

VYAPF 0017.01 AP 0017 Rev. 8 Page I of II LPC I2

VY CALCULATION DATABASE INPUT FORM Place this form in the calculation package immediately following the Title page or CCN form.

VYC-2314 0

0 N/A VY Calculation/CCN Number Revision Number Vendor Calculation Number Vendor Name: N/A PO Number:

N/A Originating Department:

Power Uvrate Critical References Impacted: 0 UFSAR [

DBD [ Reload. "Check" the appropriate box if any critical document is identified in the tables below.

EMPAC Asset/Equipment ID Number(s): P-B0- ABC.D: P46-IA B EMPAC Asset/Systcm ID Number(s):

10, 14 Keywords: Appendix R. Station Blackout, Net Positive Suction Head, Containment Overpressure, Core Spray. CS. Residual Heat Removal. RHR. Containment Sorav For Revision/CCN only: Are deletions to General References, Design Input Documents or Design Output Documents required? [J Yest ] No Design Input Documcnts and Gencral Rcfcrcnces - The following documents provide design input or supporting information to this calculation. (Refer to Appendix A, sections 3.2.7 and section 4)

NIA Revision Number Significant Critical Reference REV

  • "*Document Title (including Difference Affected Reference DOC ti Date, if applicable)

Review ft Program

(/)

1 VYC-0808 CCN04 CS and RHR Pump NPSH Margin N/A I Rev. 6 following a LOCA or ATWS l

2 N/A 6

Safe Shutdown Capability Analysis N/A App. R 3

VYC-0886 2

Station Blackout Documentation Analysis N/A 4

VYC-1457 1

VY Containment Ilcatup Analysis-MA Appendix R Application 5

EOP-3 3

Primary Containment Control NIA 6

OP 3126 16 Shutdown Using Alternate Shutdown N/A Methods 7

GE-NE-0 Extended Power Uprate, Task T0400:

N/A 0000-0011-Containment System Response 1167-01 8

N/A N/A ASME Steam Tables, 4' Edition N/A 9

VYC-1628D CCN02 Torus Temperature Response to Appendix N/A Rev. 0 R and Station Blackout Scenarios 10 TE 2003-0 N!A 077 11 VYC-2306 0

Torus Temperature for Appendix R Events N!A at EPU Conditions 12 N/A N/A Technical Specification 3.7.A.l.d NMA 13 VYC-0808 Rev. 6 CS+ RHR Pump NPSH Margin Following N/A a LOCA With Fibrous Debris on the Intake Strainers 14 VYC-1S50A Rev. 0 OPL4A Input Preparation N/A VYAPF 0017.07 AP 0017 Rev. 8 Page 2 of 11

Design Output Documents - This calculation provides output to the following documents. (Refer to Appendix A, section 5) ftttCritical Reference DOC REV Affected Refcrcncc Document Title (including Date, if applicable)

Program (1) 2 N/A 6

Safe Shutdown Capability Analysis App. R 3

VYC-2 Station Blackout Documentation Analysis 0886 15 OP-26 Fire Emergency Response Procedure App. R 3020 16 OT-19 Loss of Normal Power 3122 17 SADBD 2

Topical Design Basis Document for Safety Analysis

  • Reference # -
    • Doc # -
      • Document Title -

4*4* Affected Program -

t tt ttt Assigned by preparer to identify the reference in the body of the calculation.

Identifying number on the document, if any (e.g., 5920-0264, GI91172, VYC-1286)

List the specific documentation in this column. "See attached list" is not acceptable.

Design Input/Output Documents should identify the specific design input document used in the calculation or the specific document affected by the calculation and not simply reference the document (e.g., VYDC, MM) that the calculation was written to support. If a DBD is used as a general reference, include the most current interim change number after the title.

List the affected program or the program that reference is related to or part of.

If "yes," attach a copy of 'VY Calculation Data" marked-up to reflect deletion (See Section 3.1.8 for Revision and 5.2.3.18 for CCNs).

If the listed input is a calculation listed in the calculation database that is not a calculation of record (see definition), place a check mark in this space to indicate completion of the required significant difference review. (see Appendix A, section 4.1A.4.3). Otherwise, enter "N/A."

If the reference is UFSAR, DBD or Reload (IASD or OPL), check Critical Reference column and check UFSAR, DBD or Reload, as appropriate, on this form (above).

VYAPF 00 17.07 AP 0017 Rev. 8 Pagc 3 of 11

Calculation Number:VYC-2314 Revision Number:O CCN:0 TABLE OF CONTENTS SECTION PAGE NO.

Cover Sheet.....................................

1 VY Calculation Database Input Form (VYAPF 0017.07)......................................

2 Table of Contents.......................................

4 Calculation Objectives......................................

5 Summary of Results.......................................

5 Method of Solution.......................................

5 Assum.ptions.......................................

8 Calculation.......................................

8 Conclusion......................................

Attachments:

FIGURE 1 Containment Overpressure Available With Spray (1 page)

FIGURE 2 Station Blackout (1 page)

FIGURE 3 Altcrnate Shutdown (I page)

FIGURE 4 Appendix R (I page)

APPENDIX A Benchmarking Against GE Calculation (2 pages)

VY CALCULATION REVIEW FORM (VYAPF 0017.04)

(2 pages)

VY CALCULATION OPEN ITEM LIST (VYAPF 0017.05)

(1 page)

VYAPF 0017.02 AP 0017 Rev. 8 Page 4 of 11

VY CALCULATION SHEET Calculation Number VYC-2314 Revision Number: 0 CCN Number:

0 Calculation Objectives To determine the minimum containment pressure available to credit in NPSH calculation for non-LOCA events, such as Station Blackout and Appendix R fires, and maximum allowable operator time to accomplish containment isolation.

Suppression pool water temperatures for Appendix R and Station Blackout (SBO) may exceed levels where adequate NPSH is available for Core Spray and/or RHR pumps taking suction from the torus when torus pressure equals 14.7 psia. For LOCA events, a PCIS is generated to close the normally open torus vent path to atmosphere through valves SB-16-19-6B and SB-16-19-6, and allows sufficient containment pressure to buildup to assure adequate NPSIH [Ref 1]. For non-LOCA events, operator action is required to close one or the other valve in order to allow internal pressure to increase as the suppression pool heats up. Operator action to isolate the containment must occur at a low enough torus temperature to allow further heatup to pressurize the torus enough to assure adequate overpressure for NPSH.

Limiting scenarios for Appendix R and SBO will be examined to determine the minimum containment pressure available assuming different times for operator action to isolate the containment. The results of this analysis will be used to determine the criteria and time available for operator action to isolate the containment.

This calculation is being done in support of a power uprate from 1593 MWt to 1912 MWt.

Summary of Results Adequate containment overpressure is available provided containment isolation is achieved and maintained before suppression pool temperature exceeds 120 'F.

The earliest time to reach a suppression pool temperature of 120 'F is 40 minutcs (Appendix R limiting event).

Margin available is on the order of 3 to 5 psig.

Method of Solution The ideal gas relationships and Dalton's Law for gas mixtures are used to determine containment pressure at specified state points based on suppression pool temperatures and corresponding containment spray temperatures.

VYAPF 0017.03 AP 0017 Rev. 8 Page 5 of 11

VY CALCULATION SHEET Calculation Number VYC-2314 Revision Number: 0 CCN Number:

0 The Appendix R and SBO scenarios of concern are those that result in reactor isolation and subsequent suppression pool heatup. Appendix R scenarios are described in the Safe Shutdown Capability Analysis (SCCA) [Ref. 2]. SBO scenarios are described in VYC-0886 [Ref. 3]. Limiting events from the perspective of NPSH for low pressure pumps will maximize torus temperature and minimize available containment overpressure. Limiting scenarios are examined by comparing the NPSH available against NPSH required, first assuming the torus is at atmospheric pressure. Then, if the margin is negative, the amount of Containment Overpressure Required (COPR) is determined and compared against the amount available (calculated using the methods described herein). The required NPSH is from the time-dependent curves on pages 18 and 19, Attachment 5, VYC-0808, Rev. 6 [13].

Loss of normal drywell cooling results in rapid heatup of the drywell atmosphere [Ref. 4]. Emergency Operating Procedures require operators to spray the drywell before the temperature reaches 280 TF [Ref.

5]. The Drywell Spray Initiation Limit (DWSIL) in EOP-3 would prevent operators from initiating containment spray when drywell pressure is essentially atmospheric and drywell temperature is high.

However, fires in the cable vault or other plant areas affecting operation of equipment needed for safe shutdown require use of OP 3126 [Ref. 6]. This procedure directs operators to spray the drywell when drywell temperature exceeds 260 'F. Drywell spray is terminated when drywell temperature is reduced below 200 'F. EOP-3 also requires containment spray to be isolated before containment pressure reaches 0 psig, based on Caution 5, "Reducing primary containment pressure will reduce the available NPSH for pumps taking suction from the torus.

If the process of drywell heatup and cooldown with sprays occurs while the torus is vented, the torus pressure will remain at atmospheric pressure throughout. Drywell pressure interlocks normally would prevent operators from opening the containment spray valves when drywell pressure is low. However, there is an Appendix R selector switch which allows this interlock to be bypassed. Therefore, for the purposes of this calculation, it will be assumed that containment spray can be initiated when containment pressure is atmospheric.

Subsequent closure of the torus vent path will result in torus pressurization only if there is further hcatup of the suppression pool. Since the drywell is connected to the torus via vacuum breakers, the drywell will pressurize along with the torus.

Analytically, containment pressure and temperature following containment spray initiation can be defined as follows:

Pcon.s = Pdw = 14.7 psia (14.7 - py) (Vdw + Vvw) = n R Tpray (Eq. 1)

Tspry= Tt0on - Khx (Ttors-Tsw) vtoms / Qspray cp (Eq. 2)

Where pRw

= torus pressure VYAPF 0017.03 AP 0017 Rev. 8 Page 6 of 11

VY CALCULATION SHEET Calculation Number VYC-2314 Revision Number: 0 CCN Number:

0 Pdw

= drywell pressure Pv

= vapor pressure of water at spray temperature Vdw

= drywell free volume VWW

= wetwell (torus above suppression pool) free volume n

= moles of noncondensible gas R

= universal gas constant for ideal gas Tsprzy = containment spray temperature TtOMz

= torus (suppression pool water) temperature Kh,,

= RHR heat exchanger heat removal capacity TSW

= service water temperature v, 0,,

= specific volume of torus water Qspray = containment spray volumetric flow rate cp

= heat capacity of water Equation 2 is based on General Electric's definition for the RHR heat exchanger heat removal capability

[page 21 of Ref. 14].

The amount of noncondensible gas in the containment at the time the containment is isolated will be determined by the spray temperature at that time, and will remain constant (assuming further cooldown does not occur, which would reduce pressure below atmospheric and cause the vacuum breaker valve to the reactor building to open and allow air to flow into the torus, and assuming leakage is insignificant).

Subsequent increases in suppression pool temperature will result in a pressure incrcasc due to increase vapor pressure and heating of the noncondensible gases. Analytically, pressure can be shown to be (p - p,) = n R %pray / (Vdw + V.,)

(Eq. 3)

Since n can be defined by Eq. I based on spray temperature at the time the containment is isolated, Eq. 3 can be written as follows (p - py) = (14.7 -pv)i Tsplay / (Tspry)i (Eq. 4) where the subscript i refers to containment conditions at the time the containment is isolated.

The method of determining containment pressure described above was benchmarked against the GE LOCA results (see Appendix A). The results show reasonable agreement at the higher pool temperatures, which is the area of concern from an NPSH perspective.

VYAPF 0017.03 AP 0017 Rev. 8 Pagc 7 of 11

VY CALCtULATIOy SHEET CalculationNumber VYC-2314 Revision Number: 0 CCN Number.

0 Assumptions

1. Torus and drywell pressure equals 14.7 psia when the operator isolates the containment. A higher initial pressure would result in higher pressures later in time., therefore it is conservative to assume 14.7 psia as an initial condition.
2. Torus and drywell atmospheres are at 100% relative humidity. The benchmarking against the GE LOCA results in Appendix A show that this is a reasonable assumption at the higher suppression pool temperatures of concern.
3. Containment leakage has an insignificant impact on torus pressure. Maximum leakage is not to exceed 0.8% per day under post-LOCA conditions when pressures arc maximum. The time frame of interest in the present calculation is approximately 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, therefore leakage would be much less than 0.8% and can be ignored in the calculations.
4. Drywell and torus atmospheric temperatures equal the spray temperature. This implies operators spray the drywell and torus simultaneously. While not required by procedure, it is possible to align containment spray to do this, and assuming both drywell and torus are sprayed at the same time results in lower pressures.
5. Event specific scenarios are evaluated on the basis that operators will isolate the containment at or before the time when suppression pool temperature reaches 120 'F. This value was chosen since it corresponds to TS 3.7.A.1.d [Ref. 12], which specifies, "During reactor isolation conditions, the reactor pressure shall be depressurized to less than 200 psig at normal cooldown rates if the torus water temperature exceeds 120 'F."
6. RHR NPSH requirements are evaluated at a flow rate of 7000 gpm. This flow rate is consistent with the assumptions in the containment analysis [Ref. 7] for containment spray, but is less than the 7400 gpm assumed for bounding DBA LOCA analyses [Ref. 1].
7. CS NPSH requirements are evaluated at a flow rate of 3500 gpm. This is consistent with the flow rate assumed for long-term NPSH evaluations for DBA LOCA [Ref. 1]. The CS is only assumed to be used for alternate shutdown cooling during certain Appendix R scenarios.

Calculation Inputs:

Parameter Value Units Reference Comment TS" 85 OF T0400 [71 Maximum service water temperature.

179.375 Btu/sec l T0400 [71 Minimum RHR heat exchanger capability.

QS',V 7000 gpm l T0400 [71 Total of 6650 drywell and 350 wetwell (torus).

Water properties are from ASME Steam Tables [8].

Based on the units above, first the volumetric spray flow rate is converted from gallons per minute to pound-mass per second.

VYAPF 0017.03 AP 0017 Rev. 8 Page 8 of II

VY CALCULATION SHEET Calculation Number VYC-2314 Revision Number: 0 CCN Number 0

(gal ft Ibm min (f gal I

I ibm Q Sp'ay min 7.48gal T3 60sec lSpay

min, v X448.8 m Spray se This unit conversion can be incorporated in Equation 2.

pK ay = Toru (Ts-TSW )

pr

=

448.8xQsprayCP The expression above is the one used in the calculations.

Also, the temperature ratios in Equation 4 are based on absolute temperature in degrees Rankine, which is determined by adding 460 to the temperature in degrees Fahrenheit.

Containment Pressure Available The calculation was done by a spreadsheet solving equations 2 and 4. The results are tabulated and plotted on Figure 1. The lines on the curve represent the containment pressure that would result if containment isolation were to be achieved at the specified torus temperatures and assuming continuous containment spray.

Also plotted on Figure 1 are the short-term (0 to 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />) and long-term (> 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> for CS, and >100 hours for RHR) containment overpressure required for the RHR (7000 gpm) and core spray (3500 gpm) pumps from Reference 13.

This information is applied to event-specific scenarios discussed below.

Station Blackout The SBO Documentation Analysis, VYC-0886 [Rcf. 1] refcrs to VYC-1628D for torus temperature calculations. This calculation was revised to determine the effect of power uprate [Ref. 9]. the torus temperature from Reference 9 is shown on Figure 2. It is plotted along with the bounding torus temperature from the DBA LOCA analysis [Ref. 7]. The DBA LOCA curve bounds the SBO curve.

Only one RHR pump in the torus cooling mode is assumed for the analysis, and it is initiated at one hour into the event. The COP required for the RHR pump, and the available COP, are also shown on Figure

2. The available COP is based on containment isolation when the torus temperature is 120 0F, which occurs at approximately one hour into the event.

The analysis shows that COP available exceeds COP required at all times during the event.

VYAPF 0017.03 AP 0017 Rev. 8 Page 9 of II

VY CALCULATION SHEET Calculation Number VYC-2314 Revision Number 0 CCN Number:

0 Apjendix R The SSCA [Ref. 2] describes many different scenarios for Appendix R fires depending on the location of the fire. The location of the fire can also affect the time line for operator action to accomplish certain manual actions, including containment isolation. The location of the fire can also create hot shorts, leading to spurious actions such as opening a containment isolation valve. Therefore, an evaluation

[Ref. 10] was done to determine the ability to achieve and maintain containment isolation. The evaluation concluded that containment isolation can be achieved for most fire zones. For fire zone RB-7, elevation 303' and above in the Reactor Building, there is sufficient decay heat removal capability (i.e. all RHR, RHRSW, and all SW pumps) to preclude torus heatup to temperatures of concern. For fires requiring Alternate Shutdown (control room and cable vault), Reference 10 recommended that analysis be provided to determine if torus temperatures remain sufficiently low to preclude the need for containment overpressure, hence containment isolation.

Alternate Shutdown Alternate shutdown scenarios require operators to terminate feedwater reduction and abandon the control room to accomplish shutdown using RCIC and RHR from remote stations. Because feedwater is secured, suppression pool temperatures will be lower because reactor coolant makeup will initially be from the Condensate Storage Tank, which is significantly lower in temperature than feedwater.

Reference 11 determined the peak torus temperature for this scenario to be 177 'F.

Figure 3 shows that NPSH margin is adequate without the need to credit containment overpressure for Alternate Shutdown events.

Other A ppendix R Shutdowns These events do not involve shutdown from outside the control room. It is assumed that operators will use feedwater to control inventory if it is available. This is conservative from a torus temperature perspective. Operating procedures require operators to bypass feedwater heaters for fires in RB-3, 4, 5, and 6 scenarios, then use CS in an alternate shutdown cooling mode. Reference 11 identifies this scenario as the most limiting event from a torus temperature perspective.

The limiting torus temperature from Reference I1 is shown on Figure 3. It is plotted along with the bounding torus temperature from the DBA LOCA analysis [Ref. 7]. The DBA LOCA curve bounds the Appendix R curve.

Only one RHR pump in the torus cooling mode is assumed for the analysis, and it is initiated at ten minutes into the event. One CS pump is used in the alternate shutdown cooling mode. It is initiated VYAPF 0017.03 AP 0017 Rev. 8 Page 10 of 11

VY CALCULATIOY SHEET Revision Number 0 Calculation Number VYC-2314 CCN Number:

0 after all feedwater has been injected. The COP required for the RHR and CS pumps, and the available COP, are'also shown on Figure 3. The available COP is based on containment isolation when the torus temperature is 120 TF, which occurs at approximately 40 minutes into the event.

The analysis shows that COP available exceeds COP requircd at all timos during the event.

Conclusions Adequate containment overpressure is available provided containment isolation is achieved and maintained before suppression pool temperature exceeds 120 'F.

Containment overprcssurc is not required for Alternate Shutdown scenarios.

The earliest time to reach a suppression pool temperature of 120 'F is 40 minutes (Appendix R limiting event).

Operating procedures for SBO and Appendix R need to identify actions required to achieve containment isolation before suppression pool temperature exceeds 120 'F. Revisions to procedures [Ref. 15 and 16]

will be required before power uprate is implemented.

No 50.59 screen or safety evaluation is required at this time because these results are associated with the plant operating at 20% above its current licensed power level. Operation at this power level will require NRC approval of a license amendment request. The power uprate will be implemented by VYDC 2003-008 after NRC approval is received.

There are no precursor calculations affected by this calculation. VYC-0886 [Ref. 3], the SADBD [Ref.

17], and the SSCA [Ref. 2] maybe updated following implementation verification.

VYAPF 0017.03 AP 0017 Rev. 8 Page 11 of 11

FIGURE 1 Containment Overpressure Available with Spray WC-2314 Rev. 0 Note 1 Note 2 Note 3 Note 4 Containment Overpressure Available (psig) vapor T(isolate)

T(torus) v(torus)

T(spray)

F cu ftlbm F

p(spray)

F psia 100 110 120 130 140 150 160 170 180 190 200 200 190 180 170 160 150 140 130 120 110 100 90 0.016637 0.016572 0.01651 0.016451 0.016395 0.016343 0.016293 0.016247 0.016204 0.016165 0.01613 0.016099 178.0 170.0 162.0 153.9 145.9 137.8 129.7 121.6 113.5 105.4 97.2 89.1 7.1840 5.9926 4.9722 4.0926 3.3569 2.7297 2.2054 1.7696 1.4099 1.1149 0.8721 0.6787 0.0 0.0 0.5 0.0 0.4 0.9 0.4 0.9 1.4 0.0 0.5 1.0 1.5 1.9 0.0 0.6 1.2 1.7 2.1 2.6 0.0 0.7 1.3 1.9 2.4 2.9 3.3 0.0 0.8 1.5 2.1 2.7 3.2 3.7 4.1 0.0 0.9 1.7 2.4 3.0 3.6 4.1 4.6 5.1 0.0 1.0 1.9 2.7 3.5 4.1 4.7 5.2 5.7 6.2 0.0 1.1 2.2 3.1 3.9 4.6 5.3 5.9 6.4 6.9 7.4 0.0 1.3 2.5 3.5 4.4 5.3 6.0 6.7 7.3 7.8 8.3 8.8 Note I Note 2 Note 3 Note 4 Specific volume of suppression pool from steam tables 18].

Spray temperature calculated using Equation 2.

Vapor pressure corresponding to spray temperature from steam tables [8].

Calculated pressure using Equation 4.

Containment Overpressure Available with Containment Spray 8.0 T

8.0 7.0

/

-- iiIsolation @ 100 F 6.0 -

  • -- c -solation

= II RF 0

-solation 120 F T5.0 usIsoTation@ea1 30(F M

/

/

/f Isolation@~1 40 F 0 4.0 ----

.iLong-Term RHR Reqt.

0 7-Long-Term CS Recqt 3.0 -

Short-Term RHR Reqti 2.0

-a-

- -Short-Term CS Req't 10 120 140 160 180 200 Torus Temperature (F)

FIGURE 2 Station Blackout VYC-2314 Rev. 0 Note I Note 2 Note 3 RHR. 7000 cnm time T_pool time NPSHR NPSHA sec F

hr ft ft Note 4 Note 5 isolate 120 F Margin COPR COPA fI

)SI nsi 0

7200 14400 21600 23880 25200 28800 36000 Note I Note 2 Note 3 Note 4 Note 5 90.0 141.0 166.0 184.0 187.9 182.0 184.0 183.0 0.0 2.0 4.0 6.0 6.6 7.0 8.0 10.0 NA 23.5 23.5 23.5 23.5 23.5 23.5 29.5 30.5 24.0 22.4 25.0 24.0 24.4 7.0 0.5

-1.1 1.5 0.5

-5.1 0.0 0.0 0.5 0.0 0.0 2.1 1.2 3.2 5.2 5.8 4.9 5.2 5.1 Pool temperature Is from CCN02 to VYC-1628D Rev. 0 [91.

Required NPSH is from page 18, Attachment 5, WC-0808, Rev. 6 [13].

Available NPSH is from page 30 of CCN04 to VYC-0808, Rev. 6 [1].

Conversion of negative NPSH margin from ft to psi.

From Figure 1.

FIGURE 3 Alternate Shutdown VYC-2314 Rev. 0 Note 1 Time T_pcol sec F

Note 2 Note 3 RHR 7000 Qrpn Time NPSHR NPSHA hr ft ft Margin ft 0

5184 8640 11520 17280 26800 36000 37440 Note 1 Note 2 Note 3 s0 155 165 170 175 177.7 175 170 0.0 1.4 2.4 3.2 4.8 7.4 10.0 10.4 23.5 23.5 23.5 23.5 23.5 23.5 24.5 24.7 30.8 29.2 27.5 26.7 27.5 29.2 5.7 4.0 3.2 3.0 4.5 Pool temperature Is from X)XX0(X x ].

Required NPSH Is from page 18. Attachment 5. VYC-0808, Rev. 6 [131.

Available NPSH Is from page 30 of CCN04 to WC-0808. Rev. 6 [1].

I-GEPost-LOCA:-A. ZKShtdn.

0 28800 Tine (sec) 67600 NPSH for Alternate Shudown l--_NPSHA --

NPSHRl 40 I-I-F301-7 1

20 1

I Z 10 I-0-

0 28800 57600 Time (sec)

FIGURE 4 Appendi R VYC-2314 Rev. 0 Note I Note 2 Note 3 Note 4 Note 5 RHR. 7000 onm Isolate 120 F Time T_pool Time NPSHR NPSHA Margin COPR COPA sec F

hr ft ft ft psi psi Note 6 Note 7 Note 4 CS, 3500 gpm NPSHR NPSHA Margin COPR ft ft ft psi 0

90 3600 126 7200 155 10800 173 14400 180 18000 188 20260 190 25200.

188 0

23.5 1.0 23.5 2.0 23.5 3.0 23.5 28.2 4.7 4.0 23.5 25.7 2.2 5.0 23.5 22.3

-1.2 5.6 23.5 21.3

-2.2 7.0 23.5 22.3

-1.2 0.0 0.5 0.9 0.5 0.3 2.3 4.0 4.7 5.7 5.9 5.7 24.8 252 0.4 24.8 21.8

-3.0 24.8 20.9

-3.9 24.8 21.8

-3.0 1.3 1.6 1.3 Note 1 Pool temperature is from VYC-2306, Rev. 0 1111.

Note 2 Required NPSH Is from page 18. Attachment 5, VYC-0808. Rev. 6 113].

Note 3 Available NPSH Is from page 30 of CCN04 to WC-0808. Rev. 6 111.

Note 4 Conversion of negative NPSH margin from ft to psi.

Note 5 From figure 1.

Note 6 Required NPSH Is from page 19, Attachment 5, VYC-0808. Rev. 6 t13].

Note 7 Available NPSH Is from page 32 of CCN04 to WC-0808, Rev. 6 [1].

-GE Post-LOCA -App.

R 200.0 2

5 190.0 -pec

~160.0 7

I 150.0 iIj g140.0 -

130.0 110. 0 100.0 j

90.0-0 2880 57600 Time (sec)

COP for Appendix R lRequired for RHR -Available Required for CS]

7.0 -

6.0

.2 5.0

~4.0 1

a.3.0 1.0---

0.0 0

28800 57600 Time (sec)

APPENDIX A Benchmarking Against GE Calculation VYC-23 14 Rev. 0 Page 1 of 2 Equation 4 was derived to detcrmine containment pressure based on a simple ratio of initial and final temperatures, assuming 100% relative humidity and equal pressures in the drywell and torus. The validity of this simple method can be checked by comparing results using this method with the pressures calculated by GE using NRC approved methods. GE calculated minimum pressures for NPSH calculations and documented the results in Appendix C of Reference 7.

Equation 4 needs to be modified since GE's calculation assumes containment isolation from time zero, and the initial conditions are not defined by the spray temperature. Since the simple method assumes pressures and temperatures are equal between drywell and wetwell, we can assume the initial conditions for comparison purposes can be based on the initial torus temperature of 90 'F. The corresponding vapor pressure is 0.7 psia.

Therefore, Equation 4 can be written as follows (p - pj) = (14.7 - 0.7)i Tspry / (90 + 460)i This simple equation gives reasonable agreement with the GE results, as shown on page 2 of this Appendix, especially at the higher pool temperatures where NPSH margin is an issue.

APPENDIX A Note 1 Note 1 Note 1 Note 1 Note 2 Note 3 Note 4 Note 5 Note 6 Time WW P Pool Temp Pool Vol WW p Leakage T._spray p-v P

sec osia F

cu ft Isia Fraction F

osia osia VYC-2314 Rev. 0 Page 2 of 2 0

14.70 138.14 30.22 236.79 24.87 353.2 20.35 500.01 16.85 552.04 18.50 778.85 17.88 1088.64 18.12 1400.32 18.34 1711.2 18.51 2950.64 19.30 4185.2 20.07 5108.82 20.51 6241.48 21.00 7428.6 21.54 7738.67 21.64 8658.07 21.86 9282.26 21.97 12664.95 22.37 18250.17 22.70 24093.8 22.77 28090.7 22.86 36283.76 22.54 40568.26 22.33 51025.32 21.77 66949.13 21.00 81949.13 20.35 98197.01 19.76 113197 19.32 131935 18.89 149435 18.56 172800 18.16 90.0 68000 149.2 76810 157.4 76830 162.5 77750 166.1 78230 167.1 78290 169.6 79210 171.7 79260 173.6 79310 175.2 79330 180.0

.79400 183.3 79410 185.1 79440 186.9 79440 188.5 79430 188.8 79440 189.7 79450 190.3 79460 192.5 79520 194.4 79530 194.7 79470 194.5 79380 193.4 79270 192.3 79190 189.5 79010 185.0 78800 181.0 78720 177.0 78700 174.0 78640 171.4 78220 169.1 77870 166.2 77460 0.0 15.5 10.2 5.7 2.2 3.8 3.2 3.4 3.6 3.8 4.6 5.4 5.8 6.4 6.8 6.9 7.2 7.3 7.7 8.0 8.1 8.2 7.8 7.6 7.1 6.3 5.7 5.1 4.6 4.2 3.9 3.5 0

0.00%

0.00%

0.00%

0.00%

0.01%

0.01%

0.01%

0.01%

0.02%

0.03%

0.04%

0.05%

0.06%

0.07%

0.07%

0.08%

0.09%

0.12%

0.17%

0.22%

0.26%

0.34%

0.38%

0.47%

0.62%

0.76%

0.91%

1.05%

1.22%

1.38%

1.60%

162.0 4.97 164.6 5.25 166.1 5.46 167.6 5.65 168.9 5.80 169.1 5.90 169.8 5.95 170.3 6.03 172.1 6.29 173.6 6.50 173.9 6.55 173.7 6.50 172.8 6.40 171.9 6.25 169.7 5.95 166.0 5.46 162.8 5.05 159.5 4.65 157.1 4.43 155.0 4.20 153.1 4.02 150.8 3.75 6.1 6.4 6.7 6.9 7.1 7.2 7.3 7.4 7.7 7.9 7.9 7.9 7.8 7.6 7.2 6.6 6.1 5.6 5.3 5.0 4.7 4.3 Note I Data are GE calculated values from Appendix C of Task Report T0400 [.

Note 2 Converts WW pressure from psia to psig by subtracting 14.7.

Note 3 Leakage fraction is based on 0.8% per day assumed In Task Report T0400 [7].

Note 4 Spray temperature calculated using Equation 2.

Note 5 Vapor pressure corresponding to spray temperature from steam tables [8].

Note 6 Cacluated pressure using the modified version of Equation 4.

Page I of 2 VY CALCULATION REVIEW FORM Calculation Number: VYC-2314 Revision Number:

0 CCN Number:

0

Title:

Minimum Containmcnt Overprcssure for Non-LOCA Events Reviewer Assigned:

Pcdro B. Perez Required Date:

09/02/03 1 Interdiscipline Review Independent Review Comments*

Resolution (I) The expression for the spray water temperature is from VYC-1 850A. Please include this calculation as a reference.

(2) The Tsp. expression as written on Page 6 would need a conversion factor for the flow in units of gpm. Please see attached.

(3) Discussion of Suppression Pool pressurization should be changed to Primary Containment (PC) pressurization since the DW and the Torus are coupled volumes.

Ci)

P:ILv Ae

-y 7

(3) pe 5t E; 4WX.

'V.5 dg-

/44 Calculation Preparer (Wmments Resolved)

Date

-/

CDQ/o3/o3

, F

/

ew4\\

6w,'/2o l

o20 Reviewer Signature Date Method of Review:

3 Calculation/Analysis Rcview LI Alternative Calculation El Qualification Testing Reviewer Signature (Commenths-kesolved)

Date

  • Comments shall be specific, not general. Do not list questions or suggestions unless suggesting wording to ensure the correct interpretation of issues.

Questions should be asked of the preparer directly.

VYAPF 0017.04 AP 0017 Rev. 8 Page 1 of 2

Attachment to Review

Bruce, Using the default units for the variables confins the accuracy of the derivation.

sec

)F (

Tsr 5

) *F Tspray (F) = TrTOn (F) t (Ibm A tu p

5.y

( sec )

lbm TF The expression you have in VYC-23 14 has vf is the numerator. The reason is there is for converting the spray flow from gallons per minute to pound-mass per second.

( gal A ft3 Ibm min Igal 1

ibm rn Spray x

x x

4ray X

M=py (min) 7.48 gal 3

6Osec Spray In)

V 448.8 sec This unit conversion can be incorporated in the spray temperature expressions.

7pa = TTe - 448(8xT-Tw C

where the flow is now in gpm.

The expression above should be the one used in the spreadsheet. Please change your expression to include the conversion factor as a constant that is defined in your list of variable definitions.

Thanks, Pedro VYAPF 0017.04 AP 0017 Rev. 8 Page 2 of 2

Calculation Number:

VYC-2314 Open Item Revise OP-3020 and OT-3 122 to identifv VY CALCULATION OPEN ITEM LIST Revision Number:

0 Resolution Page

. I of I

CCN Number.

0 Method of 01 Tracking or Date Closed operator actions required to isolate containment.

a VYAPF 0017.05 AP 0017 Rev. 8 Page 1 of 1

ENN-DC-126, ATTACHMENT 9.8 MINOR CALCULATION CHANGE FORM MINOR CALCULATION CHANGE FORM (Tracked via DRN in MERLIN)

Page I of 29 Calculation No.: VYC-2314 Calculation

Title:

Minimum Containment Overpressure for Non-LOCA Events MERLIN DRN No. or Minor Calculation Change No.: 01 Revision:

0 Indicate Status of Minor Calculation Change:

- Prel; cji<en a-As-Bullt Modification No./Task No./ER No. VYDC-2003-008 (EPU Design Change).

Computer Code Used 0 Yes Z No.

If UYeps" code-1 Purpose of Change:

Address CR-VTY-2004-01974 and correct typographical errors 2 SSC affected:

None 3 Design Input Documents not used in parent See attached VYAPF0017.07 Calculation:

4 Drawings/Proceduresl Calculations I other See conclusion and VYAPF0017.07 Documents affected 5 Description of Change:

See attached description and replacement pages 6 Impact on existing calculation conclusion:

None 7 Impact on DBD's, UFSAR, Technical Specifications:

See Attachment I g VYAPFOO17.07 Form

8. The existing calculation doesl ntcircle one) have a calculation verification checklist. See remark.

Remarks: This ENN-DC-126 MCC is to a VY design verified calculation prepared under AP-0017.

AP-0017 did not have a "checklist", instead design verification was documented on form VYAP0017.04.

NOTE:

A.

If UFSAR or Technical Specifications need to be revised, Minor Calculation Change Form should not be used unless it is an editorial change to the UFSAR or Technical Specifications.

B.

Minor Calculation Change Forms do not change the status of the Parent Calculation Revision.

Prepared by:

Pedro B. Perez 6 r

gnt /

Date: 6/30/o Reviewed by:

Bruce C. Slifer Date:

Approved by James G. Rogers Date:

0/3

-/,

Where the original calculation was desi erified,ihe reviewer signature confirms the latest design verification is still valid.

This IS a Quality Record -

ENN-DC-1 26, REV. 4, ATTACHMENT 9.8 MINOR CALCuLATION CHANGE FORM Section 5. Description of Change Discussion The minor change to VYC-2314 addresses condition report CR-VTY-2004-01974 [Reference 18].

The condition report documents a difference in primary containment leakage rates used in the Alternative Source Term (AST) and Extended Power Uprate (EPI) license amendment requests [References 19 and 20, respectively]. The EPU containment response analysis assumed a primary containment leakage rate of 0.8 wt-

% per day corresponding to the current La in the Technical Specifications (Assumption 3 in VYC-2314). The AST proposed license amendment included an Appendix J exemption to remove the MSIV leakage term from the La term. The AST analysis supported maintaining the La of 0.8 wt-% per day and increasing the MSIV leakage to an aggregate of 124 scfh. In addition, the AST analysis assumed a secondary containment bypass leakage of 5 scfh as part of the La term. The overall primary containment leakage rate used in the EPU containment response and net positive suction head (NPSH) calculations should be one that bounds the AST value.

The total AST primary containment leakage is obtained by adding the MSIV and La components. The unit conversion of the MSIV mass flow rate to primary containment wt-%o/day is straight forward recognizing the 124 scfh is already at the post-LOCA accident pressure of 44 psig (UFSAR Section 5.2A.5 [Reference 23]).

124 scfz x 1, 14.7 psia F(460+338)R 1 46.9 cjh

[(44+14.7)psia (460+68)R 46.9 -x [ 1 d

fI 3 lx I100% = 0.5 wt-% per day h

Ld j L23 2T302 p The drywell temperature corresponds to the maximum from a small steam line break and bounds all accidents

[Reference 71. The primary containment volume of 232,302 ft3 is obtained by adding the minimum drywell and suppression pool free volumes of Reference 21. Standard temperature and pressure used in the AST application are 680F and 14.7 psia, respectively [Reference 19].

The total leakage is then 0.8+0.5 or 1.3 wt-% per day and a bounding value of 1.5 wt-% per day is used for NPSH calculations that credit containment overpressure.

The increased leakage does not adversely affect the primary containment pressure response used in the net positive suction head evaluations. GE performed an evaluation for the post-LOCA containment response with the increased primary containment leakage rate of 1.5 wt-% per day [Reference 22]. The results of this evaluation were compared to the 0.8 wt-% per day results [Reference 7]. The increased leakage rate results in approximately 0.2 psi decrease at about 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />. Table I provides a comparison of the suppression pool pressure results.

The conclusions from the GE post-LOCA results are applicable to the non-LOCA calculations in VYC-2314.

Leakage rate or flow is proportional to the square root of the AP (conversely, AP cA w2). The post-accident LOCA AP (drywell to atmosphere) bounds the non-LOCA cases. As a result, the 0.2 psi decrease at 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> post-LOCA is also bounding for the non-LOCA events. The "Summary of Results" in VYC-2314 Revision 0

VYC-2314, Revision 0, CCN 01 I

ENN-DC-126, Rev 4 MINOR CALCULATION CHANGE I

Page 3 of 29 documents a the margin available for the non-LOCA NPSH evaluations is in the order of 3 to 5 psig. A maximum decrease of 0.2 psi will still provide adequate NPSH margin at the 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> time of interest.

Table I Suppression Pool Pressure Comparison Time Suppression Pool Pressure (psia)

AP (psi)

Comment (Seconds) 0.8 wt-% / day 1.5 wt-% I day 0

14.7 14.7 0.0 138.14 30.22 30.22 0.0 Suppression pool peak pressure 8035.1 21.73 21.72

-0.01 24093.8 22.77 22.74

-0.03 Suppression pool peak temperature (6.7 hr) 51025.32 21.77 21.71

-0.06 100697.01 19.68 19.56

-0.12 150684.83 18.53 18.36

-0.17 171934.83 18.18 17.98

-0.20 48 hr Assumption 3 in VYC-2314 is modified to reflect the 1.5 wt-% per day primary containment bounding leakage rate.

3. Containment leakage has an insignificant impact on torus pressure. Maximum leakage is not to exceed 1.5% per day (bounding value) under post-LOCA conditions when pressures are maximum. The time frame of interest in the present calculation is approximately 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, therefore leakage would be much less than 1.5% and can be ignored in the calculations.

Other changes in this MCC address typographical errors and do not change the conclusions of the calculation.

VYC-2314 Revision 0, Page 10 or 11 includes the following:

The limiting torus temperature from Reference 11 is shown on Figure 3. It is plotted along with the bounding torus temperature from the DBA LOCA analysis fRef 71. The DBA LOCA curve bounds the Appendix R curve.

The reference to Figure 3 above should be to Figure 4 and this typographical error is corrected below:

The limiting torus temperature from Reference 11 is shown on Figure 4. It is plotted along with the bounding torus temperature from the DBA LOCA analysis [Ref. 7]. The DBA LOCA curve bounds the Appendix R curve.

VYC-2314 Revision 0, Figure 3 final peak pool temperature at 26800 seconds was 177.70F it should be 177.40F at 24560 seconds. The reference for the pool temperature (Note I) should be to Reference 11. This correction has no impact on the results or conclusions in the calculation.

These corrections are reflected below:

FIGURE 3 (table only)

Alternate Shutdown Note 1 Note 2 Note 3 RHR. 7000 qam T-pool Time NPSHR NPSHA F

hr ft ft Time sec 0

5184 8640 11520 17280 26800 36000 37440 Note 1 Note 2 Note 3 Margin ft 90 155 165 170 175 177.4 175 170 0.0 1.4 2.4 3.2 4.8 7.4 10.0 10.4 23.5 23.5 23.5 23.5 23.5 23.5 24.5 24.7 30.8 29.2 27.5 26.7 27.5 29.2 5.7 4.0 3.2 3.0 4.5 Pool temperature is from VYC-2306 111 ].

Required NPSH is from page 18, Attachment 5. VYC-0808, Rev. 6 [13].

Available NPSH is from page 30 of CCN04 to VYC-0808, Rev. 6 [1].

VYC-2314 Revision 0, Figure 4 final peak pool temperature at 20260 seconds was 190WF. The temperature and time should be 189.50F-at 20190 seconds.

calculation.

This correction has no impact on the results or conclusions in the These corrections are reflected below:

FIGURE4 (table only)

Appendix R Note 1 Note 2 Note 3 Time see 0

3600 7200 10800 14400 18000 20190 25200 T._pool F

90 126 155 173 180 188 189.5 188 Time hr 0

1.0 2.0 3.0 4.0 5.0 5.6 7.0 RHR. 7000 qpm NPSHR NPSHA ft fit 23.5 23.5 23.5 23.5 28.2 23.5 25.7 23.5 22.3 23.5 21.3 23.5 22.3 Note 4 Note 5 Isolate 120 F COPR COPA Margin ft psi psi 4.7 2.2

-1.2

-2.2

-1.2 0.0 0.5 0.9 0.5 0.3 2.3 4.0 4.7 5.7 5.9 5.7

Conclusion This MCC does not change the results in the existing calculation (VYC-2314, Revision 0). The MCC documents the primary containment leakage rate assumption of 1.5 wt-% per day. The need for crediting suppression pool overpressure in the RHR and CS NPSH evaluation shall also be addressed in the SADBD (Reference 17), UFSAR (Reference 23), system DBDs RHR (Reference 24) and CS (Reference 25), NEDC-33090P (Reference 26) and VYDC-2003-008 (Reference 27). These documents are listed in the attached APOO17.07 form as design output documents.

Note that the changes to the UFSAR were originally proposed in VYDC-2003-008 and are pending incorporation via the design change and licensing processes. The use of overpressure credit must be approved by the NRC as part of EPU. This MCC simply updates a design input parameter in the calculation that was performed under AP-00 17.

No specific 50.59 Screening/Evaluation is required for this CCN since all EPU design changes and associated 50.59 documentation will be part of VYDC-2003-008 (Reference 27).

References The following references support this MCC. These references are also listed in the attached VYAPF0017.07 form (Attached) and supplement the existing calculation design input and ouputs.

Design Input Documents 18 CR-VTY-2004-01974, EPU Containment Analysis Inconsistent with AST Assumption, 6/15/04.

19 BVY 03-70, Vermont Yankee Nuclear Power Station, License No. DPR-28 (Docket No. 50-271),

Technical Specification Proposed Change No. 262, Alternative Source Term, 7/31/03.

20 BVY 03-80, Vermont Yankee Nuclear Power Station, License No. DPR-28 (Docket No. 50-271),

Technical Specification Proposed Change No. 263, Extended Power Uprate, 9/10/03.

21 ERC-2003-008, Design Input Request (DIR) for T400 Containment System Response for EPU /

MELLLA+ (OPL-4A, Revision 1), 2/26/03 22 GE Letter, GE-VYNPS-AEP-346 (DRF 0000-0007-5271), VYNPS EPU T0400: DBA-LOCA for Long Term NPSH Evaluation, 6/10/04 23 VYNPS Updated Final Analysis Report, Revision 18 Design Output Documents 17 Safety Analysis Design Basis Document, Revision 2 23 Updated Final Analysis Report, Revision 18 24 Residual Heat Removal Design Basis Document, Revision 2 25 Core Spray Design Basis Document, Revision 1 26 NEDC-33090P, VYNPS Extended Power Uprate 27 VYDC-2003-008. Extended Power Uprate Design Change Attachments I

VYAPF001 7.07 2

Reference 5 Table and Figures

Attachment I VYAPF0017.07 Form 2 Pages

VYC-23 14 VY CALCULATION DATABASE INPUT FORM Place this form in the calculation package immediately following the Title page or CCN form.

VYC-2314 0

N/A 0

VY CalculationlCCN Number Revision Number Vendor Calculation Number Revision Number Vendor Name: N/A PO Number N/A Originating Department Extended Power Uprate Critical References Impacted: 0] UFSAR 03 DBD El Reload. 'Check' the appropriate box if any critical document is identified in the tables below.

EMPAC Asset/Equipmcnt ID Number(s): N/A EMPAC Asset/System ID Number(s):

N/A Keywords: Supprcssion Pool Ternmerature. Net Positive Suction Head. NPSH. Alternate Cooling. Ap~endix P. Station Blackout. Containment Overnressure For Rcvision/CCN only: Are deletions to General References, Design Input Documents or Design Output Documents required? El Yest 0 No Design Input Documents and General References - The following documents provide design input or supporting information to this calculation.

(Refer to Appendix A, sections 3.2.7 and section 4)

Significant Reference of DOC REV

  • "Document Title (including Date, if applicable)

Difference Affected Critical Review f t Prograrn Reference (1) 18 CR-VTY a

EPU Containment Analysis Inconsistent with AST Assumption, 2004-01974 0

6115104.

Vermont Yankee Nuclear Powcr Station, License No. DPR-28 19 BVY 03-70 0

(Docket No. 50-271), Technical Specification Proposed Change No. 262, Alternative Source Term, 7/31/03 Vermont Yankee Nuclear Power Station, License No. DPR.28 20 BVY 03-80 0

(Docket No. 50-271), Technical Specification Proposed Change No. 263. Extended Power Uprate, 9/10/03.

2 1 ERC-2003-0 Design Input Request (DIR) forT400 Containment System 008 Response for EPU / MELLLA+ (OPIAA, Revision 1), 2/26/03 22 GE-VYNPS-GE Letter, (DRF 0000-0007-5271), VYNPS EPU T0400:

AEP-346 DBA-LOCA for Long Term NPSH Evaluation. 6/10104 23 UFSAR 18 Updated Final Safety Analysis Report VYAPF 0017.07 AP 0017 Rev. 9 Form Page I of 2

, r

VYC-2314 VY CALCULATION DATABASE INPUT FORM Design Output Documents - This calculation provides output to the following documents. (Refer to Appendix A, section S) tottCritical

  • Reference REV Affected Reference DOC #

Document Title (including Date, if applicable)

Program) 17 SADBD 2

Safety Analysis Design Basis Document 24 RIRDBD 2

Residual Heat Removal System Design Basis Documcnt 25 CSDBD I

Core Spray System Design Basis Document V

23 UFSAR 18 UFSAR, Section 6.5

/

26 NEDC-33090 0

NEDC-33090P VYNPS Extended Power Uprate Report 27 VYDC-2003-08 0

Extended Power Uprate Design Change 4) z"Zi R6 Ft1jI t91

.D.

  • Reference # -
    • Doc # -

"* Document Title -

  • '" Affected Program f

Assigned by preparer to identify the reference in the body ot'the calculation.

Identifying number on the document, if any (e.g., 5920-0264, G191172, WC-1286)

List the specific documentation in this column. "See attached list" is not acceptable. Design Input/Output Documents should identify the specific design input document used in the calculation or the specific document affected by the calculation and not simply reference the document (e.g., VYDC, MM) that the calculation was written to support.

List the affected program or the program that reference is related to or part of.

If "yes," attach a copy of "VY Calculation Data" marked-up to reflect deletion (See Section 4.3.1.8 for Revision and 4.5.2.4.16 for CCNs).

If the listed input is a calculation listed in the calculation database that is not a calculation of record (see definition), place a check mark in this space to indicate completion of the required significant difference review. (see Appendix A, section 4.1.4.4.3). Otherwise, enter "NIA."

If the reference is UFSAR, DBD or Reload (IASD or OPL), check Critical Reference column and check UFSAR, DBD or Reload, as appropriate, on this form (above).

tt m

0 0

FQ a

0 CD to o

as 00 CD

\\0 w

_.P1 4:

0 0

z 0

ttt VYAPF 0017.07 AP 0017 Rev. 9 Form Page 2 of 2 GE-VYNPS-AEP-346 Data (Reference 5)

Long-term NPSH Tabular Data Time (seconds) 0.00 138.14 236.79 353.20 500.01 552.04 778.85 1088.64 1400.32 1711.20 2022.07 2331.73 2641.79 2950.64 3259.07 3567.10 3875.54 4185.20 4496.29 4805.95 5108.82 5411.17 5704.57 5996.57 6241.48 6513.51 6812.64 7121.07 7428.60 7738.67 8035.10 8346.39 8658.07 8970.17 Wetwell Pressure (psia) 14.70 30.22 24.87 20.34 18.65 18.49 17.88 18.12 18.34 18.51 18.72 18.90 19.11 19.30 19.52 19.72 19.89 20.07 20.21 20.37 20.50 20.63 20.78 20.93 21.05 21.15 21.28 21.41 21.54 21.63 21.72 21.78 21.85 21.91 Suppression Pool Temperature ('F) 90.0 149.2 157.4 162.5 166.1 167.1 169.6 171.7 173.6 175.2 176.6 177.8 178.9 180.0 180.9 181.8 182.6 183.3 184.0 184.6 185.1 185.7 186.1 186.6 186.9 187.3 187.7 188.1 188.5 188.8 189.1 189.4 189.7 190.0 Suppression Pool Volume (fte) 6.800E+04 7.681 E+04 7.683E+04 7.775E+04 7.823E+04 7.829E+04 7.921 E+04 7.926E+04 7.931 E+04 7.933E+04 7.936E+04 7.937E+04 7.939E+04 7.940E+04 7.941 E+04 7.940E+04 7.940E+04 7.941 E+04 7.943E+04 7.943E+04 7.944E+04 7.944E+04 7.944E+04 7.944E+04 7.944E+04 7.944E+04 7.944E+04 7.944E+04 7.943E+04 7.944E+04 7.943E+04 7.944E+04 7.945E+04 7.946E+04

VYC-2314, Revision 0, CCN 01 I

MINOR CALCULATION CHANGE I

Page II of 29

-I Time (seconds) 9282.26 9566.20 9878.70 10190.79 10503.29 10815.39 11439.98 12039.95 12664.95 13289.95 13914.54 14539.54 15125.17 15750.17 16375.17 17000.17 17625.17 18250.17 18837.64 19438.67 20063.67 20688.67 21313.67 21938.67 22563.67 23159.17 23735.20 24093.80 24359.79 24982.76 25604.11 26223.82 26841.92 27465.70 28090.70 28715.70 29319.45 29855.07 30390.76 30926.64 31462.26 Wetwell Pressure (psia) 21.96 21.99 22.05 22.09 22.13 22.16 22.22 22.29 22.36 22.41 22.45 22.51 22.55 22.58 22.61 22.64 22.67 22.68 22.70 22.71 22.71 22.71 22.70 22.70 22.69 22.70 22.74 22.74 22.74 22.78 22.85 22.90 22.90 22.83 22.76 22.73 22.71 22.69 22.68 22.67 Suppression Pool Suppression Pool Temperature (IF)

Volume (ft3) 190.3 7.946E+04 190.5 7.947E+04 190.8 7.947E+04 191.0 7.948E+04 191.2 7.948E+04 191.4 7.948E+04 191.8 7.950E+04 192.1 7.950E+04 192.5 7.952E+04 192.8 7.952E+04 193.1 7.952E+04 193.3 7.953E+04 193.6 7.954E+04 193.8 7.954E+04 194.0 7.954E+04 194.1 7.953E+04 194.3 7.953E+04 194.4 7.953E+04 194.5 7.953E+04 194.5 7.952E+04 194.6 7.952E+04 194.6 7.951 E+04 194.7 7.950E+04 194.7 7.949E+04 194.7 7.949E+04 194.7 7.948E+04 194.7 7.947E+04 Peak 194.7 Suppression 194.7 7.947E+04 Pool 194.7 7.945E+04 Temperature 194.6 7.944E+04 194.6 7.942E+04 194.6 7.940E+04 194.5 194.5 194.5 194.5 194.4 194.4 194.3 194.3 7.939E+04 7.938E+04 7.937E+04 7.936E+04 7.936E+04 7.935E+04 7.934E+04 7.934E+04

Time (seconds) 31997.89 32533.76 33069.45 33605.07 34140.95 34676.57 35212.20 35748.07 36283.76 36819.39 37355.07 37890.95 38426.57 38961.14 39497.01 40032.64 40568.26 41104.14 41639.82 42175.45 42711.14 43247.01 43782.64 44318.26 44854.14 45400.32 46025.32 46650.32 47275.32 47900.32 48525.32 49150.32 49775.32 51025.32 52275.32 53525.32 54772.64 56022.64 57272.64 58522.64 59772.64 Wetwell Pressure (psia) 22.65 22.63 22.61 22.60 22.58 22.56 22.54 22.51 22.49 22.47 22.45 22.42 22.40 22.38 22.34 22.31 22.28 22.25 22.22 22.19 22.16 22.13 22.09 22.06 22.03 22.01 21.96 21.93 21.90 21.87 21.84 21.81 21.77 21.71 21.65 21.59 21.52 21.46 21.41 21.35 21.28 Suppression Pool Suppression Pool Temperature (OF)

Volume (1t3 )

194.2 194.1 194.0 193.9 193.8 193.7 193.6 193.5 193.4 193.3 193.2 193.0 192.9 192.8 192.6 192.5 192.3 192.2 192.0 191.8 191.7 191.5 191.4 191.2 191.0 190.9 190.7 190.6 190.4 190.3 190.1 189.9 189.8 189.5 189.1 188.8 188.5 188.1 187.8 187.4 187.1 7.934E+04 7.933E+04 7.931 E+04 7.931 E+04 7.930E+04 7.929E+04 7.928E+04 7.928E+04 7.927E+04 7.926E+04 7.925E+04 7.924E+04 7.923E+04 7.922E+04 7.921 E+04 7.920E+04 7.919E+04 7.918E+04 7.917E+04 7.916E+04 7.915E+04 7.915E+04 7.914E+04 7.913E+04 7.912E+04 7.911 E+04 7.909E+04 7.908E+04 7.907E+04 7.907E+04 7.905E+04 7.904E+04 7.903E+04 7.901 E+04 7.900E+04 7.898E+04 7.896E+04 7.895E+04 7.893E+04 7.891 E+04 7.890E+04

Time (seconds) 61022.64 62272.64 63390.07 64461.64 65699.13 66949.13 68199.13 69449.13 70699.13 71949.13 73199.13 74449.13 75699.13 76949.13 78199.13 79449.13 80699.13 81949.13 83197.01 84447.01 85697.01 86947.01 88197.01 89447.01 90697.01 91947.01 93197.01 94447.01 95697.01 96947.01 98197.01 99447.01 100697.01 101947.01 103197.01 104447.01 105697.01 106947.01 108197.01 109447.01 110697.01 Wetwell Pressure (psia) 21.22 21.16 21.10 21.04 20.98 20.92 20.86 20.80 20.74 20.68 20.63 20.57 20.52 20.46 20.41 20.36 20.30 20.25 20.21 20.16 20.12 20.07 20.02 19.97 19.93 19.88 19.83 19.79 19.74 19.70 19.65 19.61 19.56 19.52 19.48 19.44 19.40 19.36 19.33 19.29 19.26 Suppression Pool Suppression Pool Temperature (IF)

Volume (ft3) 186.7 7.888E+04 186.4 7.886E+04 186.0 7.885E+04 185.7 7.883E+04 185.3 7.881 E+04 185.0 7.880E+04 184.6 7.879E+04 184.3 7.878E+04 183.9 7.877E+04 183.6 7.876E+04 183.3 7.875E+04 182.9 7.875E+04 182.6 7.874E+04 182.3 7.874E+04 182.0 7.873E+04 181.6 7.873E+04 181.3 7.872E+04 181.0 7.872E+04 180.7 7.871 E+04 180.4 7.870E+04 180.1 7.870E+04 179.7 7.870E+04 179.4 7.869E+04 179.1 7.870E+04 178.8 7.870E+04 178.5 7.870E+04 178.2 7.869E+04 177.9 7.869E+04 177.6 7.870E+04 177.3 7.870E+04 177.0 7.870E+04 176.7 7.870E+04 176.4 7.870E+04 176.1 7.871 E+04 175.8 7.872E+04 175.6 7.872E+04 175.3 7.872E+04 175.0 7.872E+04 174.8 7.871 E+04 174.6 7.870E+04 174.4 7.868E+04

Time (seconds) 111947.01 113197.01 114447.01 115697.01 116947.01 118197.01 119447.01 120697.01 121942.70 123192.70 124442.70 125692.70 126934.82 128184.82 129434.82 130684.82 131934.83 133184.83 134434.83 135684.83 136934.83 138184.83 139434.83 140684.83 141934.83 143184.83 144434.83 145684.83 146934.83 148184.83 149434.83 150684.83 151934.83 153184.83 154434.83 155684.83 156934.83 158184.83 159434.83 160684.83 161934.83 Wetwell Pressure (psia) 19.23 19.19 19.16 19.12 19.09 19.06 19.03 19.00 18.97 18.94 18.91 18.88 18.85 18.83 18.80 18.77 18.74 18.72 18.70 18.67 18.64 18.62 18.59 18.56 18.54 18.51 18.49 18.46 18.44 18.41 18.39 18.36 18.34 18.31 18.29 18.26 18.24 18.22 18.19 18.17 18.14 Suppression Pool Suppression Pool Temperature (OF)

Volume (1t3) 174.2 174.0 173.8 173.6 173.4 173.2 173.1 172.9 172.7 172.5 172.4 172.2 172.0 171.9 171.7 171.5 171.4 171.2 171.0 170.9 170.7 170.6 170.4 170.2 170.1 169.9 169.8 169.6 169.4 169.3 169.1 169.0 168.8 168.7 168.5 168.3 168.2 168.0 167.9 167.7 167.6 7.866E+04 7.864E+04 7.860E+04 7.858E+04 7.855E+04 7.852E+04 7.849E+04 7.846E+04 7.843E+04 7.841 E+04 7.838E+04 7.835E+04 7.832E+04 7.829E+04 7.827E+04 7.824E+04 7.822E+04 7.81 9E+04 7.816E+04 7.814E+04 7.811 E+04 7.809E+04 7.806E+04 7.803E+04 7.801 E+04 7.799E+04 7.797E+04 7.793E+04 7.791 E+04 7.789E+04 7.787E+04 7.785E+04 7.782E+04 7.780E+04 7.777E+04 7.775E+04 7.773E+04 7.771 E+04 7.769E+04 7.767E+04 7.765E+04

VYC-2314, Revision 0, CCN 01 II ENN-DC-126, Rev 4 MINOR CALCULATION CHANGE Page 15 of 29 Time (seconds) 163184.83 164434.83 165684.83 166934.83 168184.83 169434.83 170684.83 171934.83 173184.83 174434.83 175684.83 176934.83 178184.83 179434.83 180684.83 181934.83 183184.83 184434.83 185684.83 186934.83 188184.83 189434.83 190684.83 191934.83 193184.83 194434.83 195684.83 196934.83 198184.83 199434.83 200684.83 201934.83 203184.83 204434.83 205684.83 206934.83 208184.83 209434.83 210684.83 211934.83 213184.83 Wetwell Pressure (psia) 18.12 18.10 18.08 18.07 18.05 18.03 18.01 17.98 17.96 17.94 17.92 17.89 17.87 17.85 17.83 17.80 17.78 17.76 17.74 17.71 17.69 17.67 17.65 17.63 17.60 17.58 17.56 17.54 17.52 17.50 17.47 17.45 17.43 17.41 17.39 17.37 17.35 17.34 17.32 17.30 17.28 Suppression Pool Suppression Pool Temperature ('F)

Volume (ft3) 167.4 167.3 167.1 167.0 166.8 166.7 166.5 166.4 166.2 166.1 165.9 165.7 165.6 165.4 165.3 165.1 165.0 164.8 164.7 164.5 164.4 164.2 164.1 163.9 163.8 163.6 163.5 163.3 163.2 163.0 162.9 162.7 162.6 162.4 162.3 162.2 162.0 161.9 161.8 161.6 161.5 7.762E+04 7.760E+04 7.758E+04 7.756E+04 7.754E+04 7.752E+04 7.750E+04 7.748E+04 7.746E+04 7.744E+04 7.742E+04 7.740E+04 7.739E+04 7.737E+04 7.735E+04 7.732E+04 7.731 E+04 7.729E+04 7.727E+04 7.726E+04 7.724E+04 7.722E+04 7.721 E+04 7.719E+04 7.717E+04 7.71 5E+04 7.713E+04 7.712E+04 7.71 OE+04 7.709E+04 7.707E+04 7.706E+04 7.704E+04 7.703E+04 7.701 E+04 7.700E+04 7.699E+04 7.697E+04 7.696E+04 7.695E+04 7.694E+04

Time (seconds) 214434.83 215684.83 216934.83 218184.83 219434.83 220684.83 221934.83 223184.83 224434.83 225684.83 226934.83 228184.83 229434.83 230684.83 231934.83 233184.83 234434.83 235684.83 236934.83 238184.83 239434.83 240684.83 241934.83 243184.83 244434.83 245684.83 246934.83 248184.83 249434.83 250684.83 251934.83 253183.83 254433.83 255683.83 256933.83 258183.83 259433.83 260683.83 261933.83 263183.81 264433.81 Wetwell Pressure (psia) 17.26 17.25 17.23 17.21 17.20 17.18 17.17 17.15 17.13 17.12 17.10 17.09 17.07 17.06 17.05 17.03 17.02 17.00 16.99 16.98 16.96 16.95 16.94 16.92 16.91 16.90 16.88 16.87 16.86 16.85 16.83 16.82 16.81 16.80 16.79 16.77 16.76 16.75 16.74 16.73 16.72 Suppression Pool Suppression Pool Temperature (OF)

Volume (ft3) 161.4 161.3 161.1 161.0 160.9 160.8 160.7 160.6 160.5 160.4 160.3 160.2 160.1 160.0 159.9 159.8 159.7 159.6 159.5 159.4 159.3 159.2 159.1 159.0 158.9 158.8 158.8 158.7 158.6 158.5 158.4 158.3 158.3 158.2 158.1 158.0 157.9 157.8 157.8 157.7 157.6 7.691 E+04 7.690E+04 7.689E+04 7.688E+04 7.686E+04 7.685E+04 7.684E+04 7.683E+04 7.682E+04 7.681 E+04 7.680E+04 7.679E+04 7.678E+04 7.676E+04 7.675E+04 7.674E+04 7.673E+04 7.671 E+04 7.670E+04 7.669E+04 7.668E+04 7.667E+04 7.666E+04 7.666E+04 7.665E+04 7.664E+04 7.663E+04 7.662E+04 7.661 E+04 7.660E+04 7.659E+04 7.659E+04 7.658E+04 7.657E+04 7.656E+04 7.655E+04 7.655E+04 7.654E+04 7.653E+04 7.652E+04 7.651 E+04

Time (seconds) 265683.81 266933.81 268183.81 269433.81 270683.81 271933.81 273183.81 274433.81 275683.81 276933.81 278183.81 279433.81 280683.81 281933.81 283183.81 284433.81 285683.81 286933.81 288183.81 289433.81 290683.81 291933.81 293183.81 294433.81 295683.81 296933.81 298183.81 299433.81 300683.81 301933.81 303183.81 304433.81 305683.81 306933.81 308183.81 309433.81 310683.81 311933.81 313183.81 314433.81 315683.81 Wetwell Pressure (psla) 16.70 16.69 16.68 16.67 16.66 16.65 16.64 16.62 16.61 16.60 16.59 16.58 16.57 16.56 16.55 16.54 16.52 16.50 16.49 16.47 16.45 16.44 16.42 16.40 16.39 16.37 16.36 16.34 16.33 16.32 16.30 16.29 16.28 16.26 16.25 16.24 16.22 16.21 16.20 16.19 16.17 Suppression Pool Suppression Pool Temperature (OF)

Volume (ftW) 157.5 7.651 E+04 157.4 7.650E+04 157.4 7.649E+04 157.3 7.648E+04 157.2 7.648E+04 157.1 7.647E+04 157.1 7.646E+04 157.0 7.645E+04 156.9 7.645E+04 156.8 7.644E+04 156.7 7.643E+04 156.7 7.643E+04 156.6 7.642E+04 156.5 7.641 E+04 156.5 7.641 E+04 156.4 7.640E+04 156.3 7.640E+04 156.1 7.638E+04 155.9 7.638E+04 155.8 7.637E+04 155.7 7.636E+04 155.5 7.635E+04 155.4 7.635E+04 155.3 7.634E+04 155.2 7.633E+04 155.0 7.633E+04 154.9 7.632E+04 154.8 7.631 E+04 154.7 7.631 E+04 154.6 7.630E+04 154.4 7.630E+04 154.3 7.629E+04 154.2 7.630E+04 154.1 7.629E+04 154.0 7.629E+04 153.9 7.628E+04 153.8 7.628E+04 153.7 7.627E+04 153.6 7.627E+04 153.5 7.626E+04 153.4 7.626E+04

Time Wetwell Suppression Pool Suppression Pool (seconds) Pressure (psia) Temperature (OF)

Volume (f1) 316933.81 16.16 153.3 7.625E+04 3181B3.81 16.15 153.2 7.625E+04 319433.81 16.14 153.1 7.625E+04 320683.81 16.13 153.0 7.624E+04 321933.81 16.11 152.9 7.624E+04 323183.81 16.10 152.8 7.623E+04 324433.81 16.09 152.7 7.623E+04 325683.81 16.08 152.7 7.623E+04 326933.81 16.07 152.6 7.622E+04 328183.81 16.06 152.5 7.622E+04 329433.81 16.05 152.4 7.622E+04 330683.81 16.04 152.3 7.621 E+04 331933.81 16.03 152.2 7.621 E+04 333183.81 16.02 152.1 7.621 E+04 334433.81 16.01 152.0 7.621 E+04 335683.81 16.00 152.0 7.620E+04 336933.81 15.98 151.9 7.620E+04 338183.81 15.97 151.8 7.620E+04 339433.81 15.96 151.7 7.619E+04 340683.81 15.95 151.6 7.619E+04 341933.81 15.94 151.5 7.619E+04 343183.81 15.93 151.5 7.619E+04 344433.81 15.92 151.4 7.620E+04 345683.81 15.91 151.3 7.619E+04 346933.81 15.90 151.2 7.619E+04 348183.81 15.89 151.1 7.619E+04 349433.81 15.88 151.1 7.619E+04 350683.81 15.87 151.0 7.619E+04 351933.81 15.86 150.9 7.61 8E+04 353183.81 15.85 150.8 7.618E+04 354433.81 15.84 150.7 7.61 8E+04 355683.81 15.83 150.7 7.618E+04 356933.81 15.82 150.6 7.618E+04 358183.81 15.82 150.5 7.618E+04 359433.81 15.81 150.4 7.618E+04 360683.81 15.80 150.3 7.618E+04 361933.81 15.79 150.3 7.617E+04 363183.81 15.78 150.2 7.61 8E+04 364433.81 15.77 150.1 7.618E+04 365683.81 15.76 150.0 7.618E+04 366933.81 15.75 150.0 7.618E+04

VYC-2D 14, Revision 0, CCN 01 ENN-DC-126, Rev 4 MINOR CALCULATION CHANGE I

Page 19 of 29 Time (seconds) 368183.81 369433.81 370683.81 371933.81 373183.81 374433.81 375683.81 376933.81 378183.81 379433.81 380683.81 381933.81 383183.81 384433.81 385683.81 386933.81 388183.81 389433.81 390683.81 391933.81 393183.81 394433.81 395683.81 396933.81 398183.81 399433.81 400683.81 401933.81 403183.81 404433.81 405683.81 406933.81 408183.81 409433.81 410683.81 411933.81 413183.81 414433.81 415683.81 416933.81 418183.81 Wetwell Pressure (psia) 15.74 15.73 15.72 15.71 15.70 15.70 15.69 15.68 15.67 15.66 15.65 15.64 15.63 15.63 15.62 15.61 15.60 15.59 15.57 15.57 15.56 15.55 15.53 15.53 15.53 15.52 15.50 15.50 15.49 15.48 15.47 15.47 15.46 15.45 15.43 15.43 15.43 15.42 15.40 15.40 15.40 Suppression Pool Suppression Pool Temperature (OF)

Volume (ft3) 149.9 7.61 8E+04 149.8 7.618E+04 149.7 7.61 8E+04 149.7 7.618E+04 149.6 7.61 8E+04 149.5 7.61 8E+04 149.4 7.61 8E+04 149.4 7.618E+04 149.3 7.61 8E+04 149.2 7.619E+04 149.1 7.619E+04 149.1 7.619E+04 149.0 7.619E+04 148.9 7.619E+04 148.8 7.619E+04 148.8 7.619E+04 148.7 7.619E+04 148.6 7.619E+04 148.6 7.619E+04 148.5 7.619E+04 148.4 7.619E+04 148.3 7.619E+04 148.3 7.619E+04 148.2 7.620E+04 148.1 7.620E+04 148.0 7.620E+04 148.0 7.620E+04 147.9 7.620E+04 147.8 7.620E+04 147.8 7.620E+04 147.7 7.622E+04 147.6 7.621E+04 147.6 7.621E+04 147.5 7.621 E+04 147.5 7.622E+04 147.4 7.622E+04 147.4 7.622E+04 147.3 7.622E+04 147.2 7.624E+04 147.2 7.623E+04 147.1 7.623E+04

Time (seconds) 419433.81 420683.81 421933.81 423183.81 424433.81 425683.81 426933.81 428183.81 429433.81 430683.81 431933.81 433183.81 434433.81 435683.81 436933.81 438183.81 439434.06 440684.06 441934.06 443181.56 444432.31 445682.31 446932.31 448182.31 449432.31 450682.31 451932.31 453182.31 454432.44 455682.44 456932.44 458182.81 459432.81 460682.81 461932.81 463182.94 464432.94 465683.06 466933.06 468183.06 469433.06 Wetwell Pressure (psia) 15.39 15.38 15.38 15.37 15.37 15.35 15.35 15.35 15.32 15.33 15.33 15.32 15.30 15.30 15.30 15.30 15.28 15.28 15.28 15.27 15.25 15.26 15.26 15.25 15.23 15.24 15.24 15.23 15.22 15.22 15.22 15.20 15.20 15.20 15.19 15.18 15.18 15.17 15.17 15.17 15.17 Suppression Pool Suppression Pool Temperature ('F)

Volume (ft?)

I 147.1 147.0 147.0 146.9 146.9 146.9 146.8 146.8 146.7 146.7 146.6 146.6 146.6 146.5 146.5 146.4 146.4 146.4 146.3 146.3 146.3 146.2 146.2 146.1 146.1 146.1 146.0 146.0 146.0 145.9 145.9 145.9 145.9 145.8 145.8 145.8 145.7 145.7 145.7 145.6 145.6 7.624E+04 7.625E+04 7.624E+04 7.624E+04 7.625E+04 7.626E+04 7.626E+04 7.626E+04 7.626E+04 7.627E+04 7.627E+04 7.627E+04 7.628E+04 7.628E+04 7.628E+04 7.629E+04 7.630E+04 7.630E+04 7.631 E+04 7.630E+04 7.630E+04 7.631 E+04 7.632E+04 7.633E+04 7.633E+04 7.633E+04 7.633E+04 7.633E+04 7.634E+04 7.634E+04 7.636E+04 7.636E+04 7.636E+04 7.637E+04 7.637E+04 7.638E+04 7.638E+04 7.639E+04 7.639E+04 7.640E+04 7.640E+04

Time Wetwell Suppression Pool Suppression Pool (seconds) Pressure (psia) Temperature (IF)

Volume (ft3) 470683.06 15.16 145.6 7.640E+04 471933.31 15.15 145.6 7.640E+04 473183.31 15.15 145.6 7.640E+04 474433.31 15.15 145.6 7.640E+04 475683.31 15.15 145.6 7.641 E+04 476933.81 15.14 145.5 7.641E+04 478183.81 15.13 145.5 7.641 E+04 479433.81 15.13 145.5 7.642E+04 480683.81 15.13 145.5 7.642E+04 481934.06 15.11 145.5 7.642E+04 483184.06 15.12 145.4 7.642E+04 484434.06 15.11 145.4 7.643E+04 485684.69 15.10 145.4 7.643E+04 486934.69 15.10 145.3 7.644E+04 488184.69 15.10 145.3 7.645E+04 489434.69 15.10 145.3 7.645E+04 490684.69 15.09 145.3 7.645E+04 491935.44 15.08 145.2 7.646E+04 493185.44 15.08 145.2 7.646E+04 494435.44 15.08 145.2 7.646E+04 495685.44 15.07 145.2 7.646E+04 496935.69 15.06 145.2 7.647E+04 498185.69 15.06 145.1 7.648E+04 499435.69 15.05 145.1 7.648E+04 500685.69 15.05 145.1 7.648E+04 501935.69 15.05 145.1 7.648E+04 503185.69 15.05 145.0 7.648E+04 504435.81 15.03 145.0 7.648E+04 505689.50 15.03 145.0 7.649E+04 506939.50 15.03 145.0 7.649E+04 508189.50 15.03 144.9 7.650E+04 509439.50 15.02 144.9 7.650E+04 510689.50 15.01 144.9 7.650E+04 511939.50 15.01 144.9 7.651 E+04 513189.50 15.00 144.9 7.651 E+04 514439.50 15.00 144.8 7.651 E+04 515689.50 15.00 144.8 7.651 E+04 516939.50 14.99 144.8 7.653E+04 518189.50 14.98 144.7 7.653E+04 519439.50 14.98 144.7 7.653E+04 520689.50 14.98 144.7 7.653E+04

Time (seconds) 521939.50 523189.63 524439.63 525689.63 526939.63 528189.63 529439.63 530689.63 531939.63 533189.63 534439.63 535689.63 536939.63 538189.63 539439.63 540689.63 541939.63 543189.63 544439.63 545689.63 546939.63 548189.63 549439.63 550689.63 551939.63 553189.75 554439.75 555689.75 556939.75 558190.00 559440.00 560690.00 561940.00 563190.13 564440.13 565690.13 566940.13 568190.38 569440.38 570690.38 571940.38 Wetwell Pressure (psia) 14.98 14.96 14.96 14.96 14.95 14.95 14.95 14.93 14.93 14.93 14.93 14.92 14.92 14.91 14.91 14.90 14.90 14.89 14.88 14.88 14.88 14.87 14.86 14.86 14.86 14.84 14.84 14.84 14.84 14.82 14.82 14.82 14.82 14.80 14.80 14.80 14.80 14.78 14.78 14.78 14.78 Suppression Pool Suppression Pool Temperature (OF)

Volume (fte) 144.7 7.653E+04 144.6 7.654E+04 144.6 7.654E+04 144.6 7.654E+04 144.6 7.655E+04 144.6 7.655E+04 144.5 7.655E+04 144.5 7.656E+04 144.5 7.656E+04 144.5 7.657E+04 144.5 7.657E+04 144.4 7.657E+04 144.4 7.657E+04 144.4 7.658E+04 144.3 7.658E+04 144.3 7.659E+04 144.3 7.659E+04 144.2 7.660E+04 144.2 7.660E+04 144.2 7.661 E+04 144.1 7.661 E+04 144.1 7.662E+04 144.1 7.662E+04 144.0 7.663E+04 144.0 7.663E+04 144.0 7.664E+04 144.0 7.664E+04 143.9 7.665E+04 143.9 7.665E+04 143.9 7.666E+04 143.8 7.666E+04 143.8 7.666E+04 143.8 7.667E+04 143.7 7.668E+04 143.7 7.668E+04 143.7 7.668E+04 143.6 7.669E+04 143.6 7.670E+04 143.6 7.670E+04 143.6 7.671 E+04 143.5 7.671 E+04

VYC-2314, Revision 0, CCN 01 I

ENN-DC-126, Rev 4 MINOR CALCULATION CHANGE Page 23 of 29 Time (seconds) 573190.38 574440.50 575690.50 576940.50 578190.50 579440.50 580690.50 581940.50 583190.50 584440.50 585690.50 586940.50 588190.50 589440.50 590690.50 591940.50 593190.50 594440.50 595690.50 596940.50 598190.50 599440.50 600690.50 601940.50 603190.50 604440.50 605690.50 606940.50 608190.50 609440.50 610690.50 611940.50 613190.50 614440.50 615690.50 616940.50 618190.50 619440.50 620690.50 621940.50 623190.50 Wetwell Pressure (psia) 14.77 14.76 14.76 14.76 14.75 14.75 14.75 14.75 14.75 14.74 14.74 14.74 14.74 14.74 14.73 14.73 14.72 14.71 14.71 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 Suppression Pool Suppression Pool Temperature ('F)

Volume (ft3) 143.5 7.672E+04 143.5 7.673E+04 143.5 7.673E+04 143.5 7.674E+04 143.5 7.675E+04 143.5 7.675E+04 143.5 7.676E+04 143.5 7.677E+04 143.5 7.677E+04 143.5 7.679E+04 143.5 7.679E+04 143.5 7.680E+04 143.5 7.680E+04 143.5 7.680E+04 143.5 7.681E+04 143.5 7.682E+04 143.4 7.6B2E+04 143.4 7.683E+04 143.3 7.683E+04 143.3 7.684E+04 143.3 7.684E+04 143.2 7.684E+04 143.2 7.686E+04 143.1 7.686E+04 143.1 7.686E+04 143.1 7.687E+04 143.0 7.688E+04 143.0 7.688E+04 143.0 7.688E+04 143.0 7.689E+04 143.0 7.689E+04 142.9 7.689E+04 142.9 7.689E+04 142.9 7.690E+04 142.8 7.691 E+04 142.8 7.691E+04 142.8 7.691E+04 142.8 7.693E+04 142.7 7.693E+04 142.7 7.693E+04 142.6 7.694E+04

Time Wetwell Suppression Pool Suppression Pool (seconds) Pressure (psia) Temperature (OF)

Volume (fts) 624440.50 14.70 142.6 7.695E+04 625690.50 14.70 142.6 7.695E+04 626940.50 14.70 142.6 7.695E+04 628190.50 14.70 142.5 7.696E+04 629440.50 14.70 142.5 7.697E+04 630690.50 14.70 142.5 7.697E+04 631940.50 14.70 142.5 7.697E+04 633190.50 14.70 142.4 7.697E+04 634440.50 14.70 142.4 7.697E+04 635690.50 14.70 142.4 7.698E+04 636940.50 14.70 142.4 7.699E+04 638190.50 14.70 142.3 7.699E+04 639440.50 14.70 142.3.

7.701E+04 640690.50 14.70 142.3 7.700E+04 641940.50 14.70 142.3 7.701 E+04 643190.50 14.70 142.2 7.701 E+04 644440.50 14.70 142.2 7.702E+04 645690.50 14.70 142.2 7.703E+04 646940.50 14.70 142.1 7.703E+04 648190.50 14.70 142.1 7.703E+04 649440.50 14.70 142.1 7.705E+04 650690.50 14.70 142.0 7.705E+04 651940.50 14.70 142.0 7.706E+04 653190.50 14.70 142.0 7.707E+04 654440.50 14.70 141.9 7.707E+04 655690.50 14.70 141.9 7.708E+04 656940.50 14.70 141.9 7.708E+04 658190.50 14.70 141.9 7.709E+04 659440.50 14.70 141.8 7.710E+04 660690.50 14.70 141.8 7.710E+04 661940.50 14.70 141.8 7.711E+04 663190.50 14.70 141.7 7.712E+04 664440.50 14.70 141.7 7.712E+04 665690.50 14.70 141.7 7.712E+04 666940.50 14.70 141.7 7.713E+04 668190.50 14.70 141.6 7.714E+04 669440.50 14.70 141.6 7.714E+04 670690.50 14.70 141.6 7.715E+04 671940.50 14.70 141.5 7.716E+04 673190.50 14.70 141.5 7.716E+04 674440.50 14.70 141.5 7.716E+04

VYC-2314, Revision 0, CCN 01 MINOR CALCULATION CHANGE Pae2If2 Pfage 25 of 29 l

Time (seconds) 675690.50 676940.50 678190.50 679440.50 680690.50 681940.50 683190.50 684440.50 685690.50 686940.50 688190.50 689440.50 690690.50 691940.50 693190.50 694440.50 695690.50 696940.50 698190.50 699440.50 700690.50 701940.50 703190.50 704440.50 705690.50 706940.50 708190.50 709440.50 710690.50 711940.50 713190.50 714440.50 715690.50 716940.50 718190.50 719440.50 720690.50 721940.50 723190.50 724440.50 725690.50 Wetwell Pressure (psia) 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 Suppression Pool Suppression Pool Temperature (OF)

Volume (ft3) 141.5 141.5 141.4 141.4 141.4 141.4 141.4 141.3 141.3 141.3 141.2 141.2 141.2 141.1 141.1 141.1 141.1 141.1 141.1 141.0 141.0 141.0 140.9 140.9 140.9 140.8 140.8 140.8 140.8 140.8 140.8 140.8 140.7 140.7 140.7 140.6 140.6 140.6 140.6 140.6 140.5 7.717E+04 7.71 8E+04 7.718E+04 7.718E+04 7.719E+04 7.719E+04 7.720E+04 7.721 E+04 7.721 E+04 7.722E+04 7.723E+04 7.723E+04 7.724E+04 7.725E+04 7.725E+04 7.725E+04 7.725E+04 7.726E+04 7.727E+04 7.727E+04 7.728E+04 7.729E+04 7.729E+04 7.730E+04 7.731 E+04 7.731 E+04 7.732E+04 7.732E+04 7.733E+04 7.733E+04 7.733E+04 7.734E+04 7.734E+04 7.734E+04 7.736E+04 7.736E+04 7.737E+04 7.738E+04 7.738E+04 7.738E+04 7.738E+04

VYC-2314, Revision 0, CCN 01 I

ENN-DC-126,Rev4 MINOR CALCULATION CHANGE l

Page 26 of 29 Time Wetwell (seconds) Pressure (psia) 726940.50 14.70 728190.50 14.70 729440.50 14.70 730690.50 14.70 731940.50 14.70 733190.50 14.70 734440.50 14.70 735690.50 14.70 736940.50 14.70 738190.50 14.70 739440.50 14.70 740690.50 14.70 741940.50 14.70 743190.50 14.70 744440.50 14.70 745690.50 14.70 746940.50 14.70 748190.50 14.70 749440.50 14.70 750690.50 14.70 751940.50 14.70 753190.50 14.70 754440.50 14.70 755690.50 14.70 756940.50 14.70 758190.50 14.70 759440.50 14.70 760690.50 14.70 761940.50 14.70 763190.50 14.70 764440.50 14.70 765690.50 14.70 766940.50 14.70 768190.50 14.70 769440.50 14.70 770690.50 14.70 771940.50 14.70 773190.50 14.70 774440.50 14.70 775690.50 14.70 776940.50 14.70 Suppression Pool Suppression Pool Temperature (OF)

Volume (it3) 140.5 140.5 140.4 140.4 140.4 140.4 140.4 140.4 140.3 140.3 140.3 140.2 140.2 140.2 140.2 140.2 140.1 140.1 140.1 140.0 140.0 140.0 139.9 139.9 139.9 139.8 139.8 139.8 139.7 139.7 139.7 139.6 139.6 139.6 139.6 139.6 139.5 139.5 139.5 139.5 139.4 7.739E+04 7.740E+04 7.740E+04 7.741 E+04 7.742E+04 7.742E+04 7.742E+04 7.742E+04 7.744E+04 7.744E+04 7.745E+04 7.746E+04 7.746E+04 7.746E+04 7.746E+04 7.747E+04 7.748E+04 7.748E+04 7.749E+04 7.750E+04 7.751 E+04 7.751 E+04 7.752E+04 7.753E+04 7.753E+04 7.755E+04 7.755E+04 7.757E+04 7.757E+04 7.758E+04 7.759E+04 7.759E+04 7.760E+04 7.761 E+04 7.761 E+04 7.762E+04 7.762E+04 7.762E+04 7.763E+04 7.764E+04 7.764E+04

-I VYC-2314, Revision 0, CCN 01

_ ENN-DC-126, Rev 4 1 MINOR CALCULATION CHANGE Page 27 of 29 Time Wetwell Suppression Pool Suppression Pool (seconds) Pressure (psia) Temperature (IF)

Volume (yt3) 778190.50 14.70 139.4 7.766E+04 779440.50 14.70 139.4 7.766E+04 780690.50 14.70 139.4 7.766E+04 781940.50 14.70 139.3 7.768E+04 783190.50 14.70 139.3 7.768E+04 784440.50 14.70 139.3 7.768E+04 785690.50 14.70 139.3 7.768E+04 786940.50 14.70 139.3 7.769E+04 788190.50 14.70 139.3 7.770E+04 789440.50 14.70 139.2 7.770E+04 790690.50 14.70 139.2 7.770E+04 791940.50 14.70 139.2 7.772E+04 793190.50 14.70 139.2 7.772E+04 794440.50 14.70 139.1 7.772E+04 795690.50 14.70 139.1 7.773E+04 796940.50 14.70 139.1 7.774E+04 798190.50 14.70 139.0 7.775E+04 799440.50 14.70 139.0 7.775E+04 800690.50 14.70 139.0 7.777E+04 801940.50 14.70 138.9 7.777E+04 803190.50 14.70 138.9 7.777E+04 804440.50 14.70 138.9 7.777E+04 805690.50 14.70 138.9 7.779E+04 806940.50 14.70 138.9 7.779E+04 808190.50 14.70 138.8 7.780E+04 809440.50 14.70 138.8 7.781E+04 810690.50 14.70 138.8 7.781E+04 811940.50 14.70 138.8 7.781 E+04 813190.50 14.70 138.8 7.782E+04 814440.50 14.70 138.7 7.783E+04 815690.50 14.70 138.7 7.783E+04 816940.50 14.70 138.7 7.784E+04 818190.50 14.70 138.7 7.784E+04 819440.50 14.70 138.6 7.785E+04 820690.50 14.70 138.6 7.786E+04 821940.50 14.70 138.6 7.786E+04 823190.50 14.70 138.5 7.788E+04 824440.50 14.70 138.5 7.788E+04 825690.50 14.70 138.5 7.789E+04 826940.50 14.70 138.5 7.790E+04 828190.50 14.70 138.4 7.790E+04

VYC-2314, Revision 0, CCN 01 I

ENN-DC-126, Rev 4 l

MINOR CALCULATION CHANGE l

Page 28 of 29 Time Wetwell Suppression Pool Suppression Pool (seconds) Pressure (psia) Temperature (OF)

Volume (ft3) 829440.50 830690.50 831940.50 833190.50 834440.50 835690.50 836940.50 838190.50 839440.50 840690.50 841940.50 843190.50 844440.50 845690.50 846940.50 848190.50 849440.50 850690.50 851940.50 853190.50 854440.50 855690.50 856940.50 858190.50 859440.50 860690.50 861940.50 863190.50 864000.00 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 14.70 138.4 138.4 138.3 138.3 138.3 138.3 138.3 138.2 138.2 138.2 138.2 138.2 138.2 138.2 138.1 138.1 138.1 138.1 138.1 138.0 138.0 137.9 137.9 137.9 137.9 137.8 137.8 137.8 137.8 7.791 E+04 7.792E+04 7.793E+04 7.793E+04 7.795E+04 7.795E+04 7.795E+04 7.795E+04 7.795E+04 7.795E+04 7.797E+04 7.797E+04 7.797E+04 7.797E+04 7.799E+04 7.799E+04 7.799E+04 7.799E+04 7.801 E+04 7.801 E+04 7.802E+04 7.803E+04 7.804E+04 7.805E+04 7.805E+04 7.806E+04 7.806E+04 7.807E+04 7.808E+04

10.D log 30CA

)OD CICA 9.0 80 7.0

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Long-term DBA-LOCA NPSH Suppression Pool Temperature 0

0 0.8 % per day Leakage 0

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0 0

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Long-term DBA-LOCA NPSH Suppression Pool Pressure

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