Text

Response to Request for Additional Information Regarding License Amendment to Revise Reactor Steam Dome Pressure - Low Instrumentation Function Allowable Value (PLA-8005)
	ML22144A003
Person / Time
Site:	Susquehanna
Issue date:	05/23/2022
From:	Cimorelli K; Susquehanna, Talen Energy
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	PLA-8005
	Download: ML22144A003 (24)
	v • d • e

Kevin Cimorelli Susquehanna Nuclear, LLC Site Vice President 769 Salem Boulevard Berwick, PA 18603 Tel. 570.542.3795 Fax 570.542.1504 Kevin.Cimorelli@TalenEnergy.com 10 CFR 50.90 May 23, 2022 Attn: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 SUSQUEHANNA STEAM ELECTRIC STATION RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT TO REVISE REACTOR STEAM DOME PRESSURE - LOW INSTRUMENTATION FUNCTION ALLOWABLE VALUE PLA-8005 Docket No. 50-387 and 50-388

References:

1) Susquehanna letter to NRC, Proposed Amendment to Licenses NPF-14 and NPF-22: Revise Reactor Steam Dome Pressure - Low Instrumentation Function Allowable Value (PLA-7950), dated October 5, 2021 (ADAMS Accession No. ML21279A026).

2) Susquehanna letter to NRC, Supplement to License Amendment to Revise Reactor Steam Dome Pressure - Low Instrumentation Function Allowable Value (PLA-7979), dated December 16, 2021 (ADAMS Accession No. ML21350A265).

3) NRC letter to Susquehanna, Regulatory Audit Plan in Support of License Amendment Request to Revise Technical Specifications for Reactor Steam Dome Pressure - Low Instrumentation Function Allowable Values (EPID L-2021-LLA-0062), dated March 4, 2022 (ADAMS Accession No. ML22056A012).

4) NRC email to Susquehanna, NRC Request for Additional Information -

Susquehanna License Amendment Request (EPID L-2021-LLA-0184), dated April 21, 2022 (ADAMS Accession No. ML22111A313).

Pursuant to 10 CFR 50.90, Susquehanna Nuclear, LLC (Susquehanna), submitted, in Reference 1, a request for an amendment to the Technical Specifications (TS) for the Document Control Desk PLA-8005 Susquehanna Steam Electric Station (SSES), Units 1 and 2, Facility Operating License numbers NPF-14 and NPF-22. The proposed amendment would modify TS 3.3.5.1, Emergency Core Cooling Systems (ECCS) Instrumentation. Specifically, the proposed amendment would modify the TS Allowable Values (A Vs) for the ECCS Instrumentation, Core Spray and Low Pressure Coolant Injection Reactor Steam Dome Pressure Low Instrumentation Functions l.c, l.d, 2.c, and 2.d, in TS Table 3.3.5.1-1. Susquehanna provided supplemental infonnation in Reference 2, including revised TS markups which superseded those provided in Reference 1 in their entirety.

In Reference 3, the NRC notified Susquehanna of the intent to conduct a virtual regulatory audit from March 9 through April 29, 2022. During the virtual audit, Susquehanna personnel met with members of the NRC staff to discuss specific questions provided by the NRC staff. Upon completion of the regulatory audit, the NRC provided a Request for Additional Information (RAI) in Reference 4. Enclosure 1 provides Susquehanna's response to the RAI. Enclosure 2 provides calculation excerpts referenced in the RAI response in Enclosure 1.

Susquehanna has reviewed the information supporting a finding of No Significant Hazards Consideration and the Environmental Consideration provided to the NRC in Reference 1 and determined the information provided herein does not impact the original conclusions in Reference 1.

There are no new or revised regulatory commitments contained in this submittal.

Should you have any questions regarding this submittal, please contact Ms. Melisa Krick, Manager Nuclear Regulatory Affairs, at (570) 542-1818.

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

Executed on May 23, 2022.

Enclosures:

1. Response to Request for Additional Information

2. Calculation Excerpts K. Cimorelli

Document Control Desk PLA-8005 Copy: NRC Region I Mr. C. Highley, NRC Senior Resident Inspector Ms. A. Klett, NRC Project Manager Mr. M. Shields, PA DEP/BRP

to PLA-8005 Response to Request for Additional Information to PLA-8005 Page 1 of 3 Response to Request for Additional Information On October 5, 2021, Susquehanna Nuclear, LLC (Susquehanna) submitted a license amendment request (LAR) for the Susquehanna Steam Electric Station (SSES) in Reference 1. Specifically, Susquehanna requested a revision to Technical Specification (TS) 3.3.5.1, Emergency Core Cooling Systems (ECCS) Instrumentation. The proposed amendment would modify the TS Allowable Values (AVs) for the ECCS Instrumentation, Core Spray and Low Pressure Coolant Injection (LPCI) Reactor Steam Dome Pressure - Low Instrumentation Functions 1.c, 1.d, 2.c, and 2.d, in TS Table 3.3.5.1-1. Susquehanna provided supplemental information in Reference 2, including revised TS markups which superseded those provided in Reference 1 in their entirety.

In Reference 3, the NRC notified Susquehanna of the intent to conduct a virtual regulatory audit from March 9 through April 29, 2022. During the virtual audit, Susquehanna personnel met with members of the NRC staff to discuss specific questions provided by the NRC staff. Upon completion of the regulatory audit, the NRC provided a Request for Additional Information (RAI) in Reference 4. The response to this RAI is provided below.

RAI-1

In its license amendment request, the licensee proposed to increase the upper analytical limit (UAL) from the current value of 440 pounds per square inch gauge (psig) to 445 psig. The NRC staff requests the licensee to describe how it calculated the proposed UAL of 445 psig and justify the acceptability of the proposed UAL. The staff requests the licensee to include the information from the licensees audit question response posted in the audit portal.

Susquehanna Response The UAL for this submittal was determined using the same approach as that currently approved by the NRC.

When the proposed UAL was developed, the head of water (approximately 50 psi) that would be present in the both the Residual Heat Removal (RHR) and Core Spray systems was taken into account. The RHR and Core Spray piping systems have a design pressure of 450 psig and 500 psig, respectively. The American Society of Mechanical Engineers (ASME) Code allows for a maximum pressure of the piping under Emergency/Faulted service levels. The current maximum pressure of the RHR piping is 495 psig which when accounting for the 50 psi of water head yields a UAL of 445 psig. The current maximum pressure of the Core Spray system is 550 psig which when accounting for the 50 psi of water head yields an UAL of 500 psig. These maximum pressures for the RHR and Core Spray piping still meet Code requirements. The bounding RHR system UAL was used. This was the same approach used to develop the current TS UALs except the RHR piping was reanalyzed for a maximum pressure of 495 psig instead of 490 psig (previous value).

to PLA-8005 Page 2 of 3 The pressure associated with the head of water in each system was determined in the following manner. A head of water was assumed from the reactor vessel (elevation 780.8) to the Core Spray (plant elevation 649.83) or RHR pump discharge check valve (plant elevation 651.54).

This yields a water column of approximately 130 ft. The water column is divided into two distinct zones by the closed containment isolation valve (HV1(2)51F015A/B for RHR and HV1(2)52F005A/B for Core Spray). Upon reaching a steam dome pressure of 445 psig the containment isolation valves could open, thereby exposing the low pressure piping to this reactor pressure. The piping in the reactor building is assumed to be at reactor building conditions when determining the pressure associated with this column of water. The piping within containment and also the head of water in the reactor vessel is assumed to be at saturated reactor conditions (445 psig) given that it is directly tied to the reactor vessel and the recirculation loops prior to the containment valve opening. Note that these assumptions are the same as previously approved by the NRC.

The UAL values described above continue to provide substantial margin. First, the RHR system discharge piping was hydrostatically tested to 1.25x the design pressure (i.e., tested at 562.5 psig). Second, the LOCA (e.g., hydrodynamic) and seismic loads occur concurrently when the reactor pressure has not encroached on the UAL. Therefore, when the Core Spray and RHR valves begin to open, the hydrodynamic and seismic loads will not be present. This results in substantial margin in the piping analyses and would allow for a significantly higher UAL.

Based on this discussion, the head of water was accounted for in the analysis and substantial margin still exists for the piping system.

RAI-2

The NRC staff requests the licensee to provide the following information pertaining to the calculations posted in the audit portal.

a. Pages 14 to 21 of Appendix A to Calculation EC-080-1006, Revision 3, for Unit 1.

b. Pages 14 to 21 of Appendix A to Calculation EC-080-1007, Revision 4, for Unit 2.

Susquehanna Response The requested calculation excerpts are provided in Enclosure 2 to this letter. Note that the revision bars in the excerpts denote changes from the versions of the calculations used to support Susquehannas original submittal in Reference 1, which were superseded by the versions of the calculations used to support the supplement in Reference 2. The revision bars do not denote changes from what was provided during the regulatory audit.

to PLA-8005 Page 3 of 3 References

1. Susquehanna letter to NRC, Proposed Amendment to Licenses NPF-14 and NPF-22: Revise Reactor Steam Dome Pressure - Low Instrumentation Function Allowable Value (PLA-7950), dated October 5, 2021 (ADAMS Accession No. ML21279A026).

2. Susquehanna letter to NRC, Supplement to License Amendment to Revise Reactor Steam Dome Pressure - Low Instrumentation Function Allowable Value (PLA-7979), dated December 16, 2021 (ADAMS Accession No. ML21350A265).

3. NRC letter to Susquehanna, Regulatory Audit Plan in Support of License Amendment Request to Revise Technical Specifications for Reactor Steam Dome Pressure - Low Instrumentation Function Allowable Values (EPID L-2021-LLA-0062), dated March 4, 2022 (ADAMS Accession No. ML22056A012).

4. NRC email to Susquehanna, NRC Request for Additional Information - Susquehanna License Amendment Request (EPID L-2021-LLA-0184), dated April 21, 2022 (ADAMS Accession No. ML22111A313).

to PLA-8005 Calculation Excerpts Susquehanna Calculations EC-080-1006, Revision 3, Appendix A Pages 14-21 EC-080-1007, Revision 4, Appendix A Pages 14-21

EC-080-1006 Page 14 ASSHQGL[ A SeWpoinW DeWeUminaWion Wo SXppoUW TS Change (LDCNV 5633-5636, PLAV-7950 and 7979)

EC-080-1006 Page 15 ObMHFWLYH: ThiV appendi[ Zill deWeUmine neZ Anal\\Wical LimiW, AlloZable ValXe, Nominal TUip SeWpoinW, PUoceVV (DeYice) SeWpoinW, and AV-FoXnd and AV-LefW ToleUanceV foU inVWalled CoUe SpUa\\ and RHR +/- LPCI InjecWion on LoZ ReacWoU VeVVel PUeVVXUe, PISB211N021A-D. TheVe neZ VeWpoinWV VXppoUW Whe Technical SpecificaWion change VXbmiWWal Wo Whe NRC (LDCNV 5633 +/-

5636, PLAV-7950 and 7979).

DHVFULSWLRQ: BaUWon 288 dP VZiWcheV aUe XVed in a gaXge pUeVVXUe applicaWion Wo moniWoU UeacWoU VWeam dome pUeVVXUe. TheVe VZiWcheV pUoYide a loZ pUeVVXUe peUmiVViYe foU LPCI and CoUe SpUa\\ V\\VWem injecWion and high-pUeVVXUe iVolaWion of Whe LPCI/CS injecWion lineV Wo pUoWecW Whem fUom oYeUpUeVVXUe. The AlloZable ValXe foU WheVe VeWpoinWV aUe conWUolled in Whe Technical SpecificaWionV; Whe nominal WUip VeWpoinWV aUe conWUolled in Whe Technical ReTXiUemenWV ManXal.

The VZiWcheV¶ noUmal opeUaWing pUeVVXUe iV Whe UeacWoU VWeam dome pUeVVXUe plXV Whe VenVing line head, UefeUenced Wo aWmoVpheUe.

The VZiWcheV aUe noW being Ueplaced aV paUW of Whe Technical SpecificaWion change.

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A - LOWER 380 382 412.5 426.1 5

16.0 A - UPPER 445 443 16.0 B - LOWER 380 382 412.5 425.2 5

16.0 B - UPPER 445 443 16.0 C - LOWER 380 382 412.5 433.9 5

16.0 C - UPPER 445 443 16.0 D - LOWER 380 382 412.5 433.9 5

16.0 D - UPPER 445 443 16.0 AVVXPSWLRQV / IQSXWV

1. DCP 97-9076 Ueplaced Whe oUiginal BaUkVdale pUeVVXUe VZiWch ZiWh a BaUWon pUeVVXUe indicaWing VZiWch.

2. The coUe VpUa\\ and RHR piping conWainV boWh high and loZ pUeVVXUe piping. To pUeYenW oYeU-pUeVVXUe of Whe loZ pUeVVXUe piping on WheVe V\\VWemV, Whe V\\VWemV conWain a check YalYe on Whe high pUeVVXUe piping Wo pUeYenW oYeU pUeVVXUe of Whe loZ pUeVVXUe piping (RHR Check ValYe +/-

HV1(2)51F050A/B and CoUe SpUa\\ +/- HV1(2)52F006A/B). In Whe Technical SpecificaWion change VXbmiWWal Wo Whe NRC (LDCNV 5633 +/- 5636 and PLAV-7950 and 7979), WheVe check YalYeV aUe cUediWed aV Whe Vingle failXUe pUoof meWhod of pUeYenWing oYeU-pUeVVXUi]aWion of Whe loZ pUeVVXUe piping. Since Whe check YalYeV pUoYide oYeU pUeVVXUe pUoWecWion, Whe UeacWoU pUeVVXUe open peUmiVViYe foU Whe V\\VWem injecWion YalYeV (RHR InjecWion ValYe +/-

HV1(2)51F015A/B and CoUe SpUa\\ +/- HV1(2)52F005A/B) and Whe UeacWoU pUeVVXUe peUmiVViYe foU Whe RHR and CoUe SpUa\\ pXmp VWaUWV aUe being UemoYed fUom Whe Technical SpecificaWionV.

NoWe Whe ma[imXm deYeloped head of Whe RHR and CoUe SpUa\\ pXmpV Zill noW caXVe a pipe oYeU

EC-080-1006 Page 16 pUeVVXUe condiWion. EYen WhoXgh Whe UeacWoU pUeVVXUe open peUmiVViYe foU Whe V\\VWem injecWion YalYeV and Whe coUe VpUa\\ and RHR UeacWoU pUeVVXUe pXmp VWaUW peUmiVViYe aUe being UemoYed fUom Whe planW Technical SpecificaWionV, Whe peUmiVViYe logic iV VWill UeTXiUed peU FSAR SecWion 7.3 and Zill be mainWained in Whe planW. The NRC haV UeTXeVWed VXpplemenWal infoUmaWion (NRC ADAMS aVcenVion nXmbeU ML21316A124) on Whe oUiginal SSES VXbmiWWal UeTXeVW. AfWeU diVcXVVion ZiWh Whe NRC, SSES haV decided Wo Ue-implemenW Whe XppeU pUeVVXUe peUmiVViYe limiW (PLA-7979).

3. LoZeU Anal\\Wical LimiW: 380 pVig VecWion 7.3 (EC-FUEL-1452 UeYiVion 21). DXUing Whe DBE, Whe coUe VpUa\\/LPCI injecWion YalYeV begin Wo VWUoke open aW 380 pVig and Whe YeVVel conWinXeV Wo depUeVVXUi]e dXUing Whe YalYe VWUoke. ThXV, Zhen Whe YalYeV aUe fXll open, Whe YeVVel pUeVVXUe iV loZ enoXgh Wo alloZ CS/LPCI injecWion (aW injecWion pUeVVXUeV Vpecified in EC-FUEL-1452 UeYiVion 21).

UppeU Anal\\Wical LimiW: 445 pVig. In Whe NRC SER foU UniW 2 TS AmendmenW 155 (NIMS docXmenW ID NRC 2000-0022, ADAMS aVcenVion nXmbeU ML010160354), Whe NRC VWaWeV:

³The CS V\\VWem and LPCI V\\VWem iniWiaWion logic haV a loZ-pUeVVXUe peUmiVViYe fXncWion Zhich pUeYenWV Whe CS V\\VWem injecWion YalYeV HV-252-F005A/B and Whe LPCI V\\VWem injecWion YalYeV HV-251-F017A/B fUom opening XnWil UeacWoU pUeVVXUe haV decUeaVed Wo Whe V\\VWem'V deVign pUeVVXUe.'

A UeYieZ of Whe NIMS daWa baVe deWeUmined WhaW Whe RHR and CoUe SpUa\\ V\\VWem deVign baViV V\\VWem piping pUeVVXUe iV 450 pVig and 500 pVig, UeVpecWiYel\\. The VelecWion of 445 pVig aV Whe UppeU Anal\\Wical LimiW pUoYideV maUgin Wo Whe RHR V\\VWem deVign pUeVVXUe (noWe coUe VpUa\\

deVign pUeVVXUe iV boXnded b\\ Whe RHR V\\VWem) conViVWenW ZiWh Whe NRC SER.

4. ThiV calcXlaWion Zill folloZ Whe meWhodolog\\ in NEDC-31336 (calcXlaWion EC-PUPC-1004).

5. PeU FSAR SecWion 7.3, Whe XppeU alloZable YalXe iV loZ enoXgh WhaW Whe UeacWoU dome pUeVVXUe haV fallen Wo a YalXe beloZ Whe coUe VpUa\\ and RHR/LPCI ma[imXm alloZable piping pUeVVXUe Wo pUeclXde piping failXUe. The loZeU alloZable YalXe iV high enoXgh Wo enVXUe WhaW Whe ECCS injecWion pUeYenWV Whe fXel peak cladding WempeUaWXUe fUom e[ceeding Whe limiWV of 10 CFR 50.46.

MHWKRG Anal\\Wical LimiW UppeU Anal\\Wical LimiW: The XppeU anal\\Wical limiW XVed in Whe anal\\ViV iV 445 pVig Zhich, aV VWaWed in AVVXmpWion 3, meeWV Whe UeTXiUemenWV of Whe pUeYioXV NRC SER.

CalcXlaWion EC-PIPE-16071 pUoYideV addiWional infoUmaWion jXVWif\\ing Whe VelecWed XppeU anal\\Wical limiW.

LoZeU Anal\\Wical LimiW: PeU aVVXmpWion 3 of WhiV appendi[, Whe loZeU anal\\Wical iV 380 pVig.

EC-080-1006 Page 17 AlloZable ValXe (AV)

The AlloZable ValXe iV deWeUmined fUom Whe Anal\\Wic LimiW, Whe deYice accXUac\\, and Whe calibUaWion accXUac\\ peU Whe gXidance in NEDC-31336 SecWion 1.2.3.2.

AVLOWER ALLOWER + (1.645/n)*(Aacc2 + Cacc2 + PMA2 + PEA2)

AVUPPER ALUPPER - (1.645/n)*(Aacc2 + Cacc2 + PMA2 + PEA2)

WheUe:

n = Whe nXmbeU of VWandaUd deYiaWionV () XVed in Vpecif\\ing Whe indiYidXal componenWV of XnceUWainW\\.

1.645 iV Whe Z YalXe foU a one-Vided noUmal diVWUibXWion in oUdeU Wo achieYe a 95%

pUobabiliW\\ of VXcceVV (i.e., AL aYoidance)

AccXUac\\ of RepeaWabiliW\\ (Aacc)

Aacc iV Whe accXUac\\ (UepeaWabiliW\\) of Whe BaUWon 288A (diffeUenWial) pUeVVXUe indicaWing VZiWcheV. The 2 (95%) YalXe foU VZiWch ³accXUac\\ of UepeaWabiliW\\' iV 0.25% of fXll Vcale (IOM 311 VolXme 3, Wab 15, p. 294)

The ³2' YalXe of Aacc-2 = 0.25%(500 pVig) = 1.25 pVig The ³1' YalXe of Aacc-1 = Aacc-2/2 = 0.625 pVig CalibUaWion EUUoU (Cacc)

The calibUaWion eUUoU (Cacc) iV aVVociaWed ZiWh Whe UepeaWabiliW\\ of Whe meaVXUemenW and WeVW eTXipmenW XVed Wo calibUaWe Whe inVWUXmenW. UnceUWainWieV in Ueading Whe M&TE oXWpXW aUe alVo UeleYanW facWoUV.

A conVeUYaWiYe calibUaWion eUUoU 1 facWoU (Cacc) eTXiYalenW Wo Whe inVWUXmenW eUUoU (Aacc1) iV aVVXmed.

PUoceVV MeaVXUemenW AccXUac\\ (PMA)

PMA iV defined in GE NEDC-31336 (calcXlaWion EC-PUPC-1004) VecWion 1.2.1 aV Whe pUoceVV YaUiable meaVXUemenW effecWV (e.g., Whe effecW of changing flXid denViW\\ on leYel meaVXUemenW) aVide fUom Whe pUimaU\\ elemenW and VenVoU. TheUe aUe no effecWV dXe Wo changing condiWionV aVVociaWed ZiWh WhiV paUameWeU and iW can be conVideUed 0 foU WhiV applicaWion.

PUimaU\\ ElemenW AccXUac\\ (PEA)

PEA iV defined in GE NEDC-31336 (calcXlaWion EC-PUPC-1004) VecWion 1.2.1 aV Whe accXUac\\ of Whe deYice (e[clXViYe of Whe VenVoU) Zhich iV in conWacW ZiWh Whe pUoceVV, UeVXlWing in Vome foUm of inWeUacWion (e.g., in an oUifice meWeU, Whe oUifice plaWe, adjacenW paUWV of Whe pipe and Whe pUeVVXUe connecWionV conVWiWXWe Whe pUimaU\\ elemenW). TheUe aUe no inWeUacWionV dXe Wo conWacW ZiWh Whe pUoceVV WhaW ZoXld impacW Whe accXUac\\ of Whe deYice. ThiV paUameWeU iV conVideUed 0 foU WhiV applicaWion.

EC-080-1006 Page 18 AlloZable ValXeV UppeU and LoZeU Anal\\Wic limiWV foU Whe UeacWoU YeVVel pUeVVXUe VeWpoinW ALXppeU = 445 pVig ALloZeU = 380 pVig AlloZable ValXeV aUe offVeW fUom Whe Anal\\Wic LimiWV b\\ alloZanceV foU Whe accXUac\\ of VZiWch UepeaWabiliW\\ (Aacc) and Whe calibUaWion eUUoU (Cacc) peU GE-NEDC-31336 (SecWion 1.2.3.2). NoWe WhaW Whe PUoceVV MeaVXUemenW AccXUac\\

(PMA) and Whe PUoceVV ElemenW AccXUac\\ (PEA) = 0 AVXppeU = ALXppeU - (1.645/n)*(Aacc2 + Cacc2) ZheUe n = 1 ( YalXe mXlWiplieU)

AVXppeU = 445 +/- 1.645/1 * (0.6252 + 0.6252)

AVXppeU = 443.55 pVig AVloZeU = ALloZeU + (1.645/n)*(Aacc2 + Cacc2) ZheUe n = 1 ( YalXe mXlWiplieU)

AVloZeU = 380 + 1.645/1 * (0.6252 + 0.6252)

AVloZeU = 381.45 pVig ConVeUYaWiYel\\, LDCNV 5633 +/- 5636 and PLAV-7950 and 7979 Zill XVe a LoZeU AlloZable ValXe of gUeaWeU Whan oU eTXal Wo 382 pVig and an UppeU AlloZable Vale of leVV Whan oU eTXal Wo 443 pVig.

Nominal TUip SeWpoinWV PeU GE NEDC-31336 (SecWion 1.2.3.3), Whe Nominal TUip SeWpoinW aVVociaWed ZiWh each Anal\\Wic LimiW iV deWeUmined b\\:

NTSPXppeU = ALXppeU - (1.645/n)*(Aacc2 + Cacc2 + D2)

NTSPloZeU = ALloZeU + (1.645/n)*(Aacc2 + Cacc2 + D2)

WheUe D = DUifW AlloZance AWWachmenW 1 calcXlaWed Whe inVWUXmenW dUifW of Whe BaUWon 288A pUeVVXUe VZiWcheV and deWeUmined Whe dUifW YalXe Wo be 6.07 pVig baVed on acWXal planW daWa. BaVed on infoUmaWion in EC-080-1014 UeYiVion 0 pUoYided b\\ Whe YendoU, a dUifW YalXe of 10 pVig iV moUe appUopUiaWe Zhen WempeUaWXUe effecWV aUe inclXded. The peUWinenW paUWV of EC-080-1014 aUe UepUodXced heUe:

The deYice VeWpoinW dUifW aVVociaWed ZiWh WempeUaWXUe YaUiaWion haV been deWeUmined b\\ Whe manXfacWXUeU Wo be 0.83% (of Span) peU 50F change in ambienW (deYice) WempeUaWXUe.

The annXal ambienW WempeUaWXUe Uange in RoomV I/II-401, I-500, and I/II-512 iV appUo[imaWel\\ 30F (CalcXlaWion EC EQQL-1004). The VeWpoinW dUifW Zill be aVVXmed Wo occXU oYeU WhiV ma[imXm YaUiaWion.

EC-080-1006 Page 1 TheUefoUe, Whe WempeUaWXUe dUifW, DT iV:

DT = 0.83%(30F/50F)*1057pVi (noWe cXUUenW Vpan iV 500 pVi bXW daWa iV foU a Vpan of 1057 pVi Zhich iV conVeUYaWiYel\\ XVed)

DT = 5.26 pVi RelaWiYe HXmidiW\\ DUifW DRH, The deYice VeWpoinW dUifW aVVociaWed ZiWh hXmidiW\\ YaUiaWion haV been deWeUmined b\\ Whe manXfacWXUeU Wo be 0.26% (of Span) peU 30% change in ambienW RelaWiYe HXmidiW\\.

The deVign baViV VXmmeU oXWVide aiU WempeUaWXUe iV 92F dU\\ bXlb and 78F ZeW bXlb. AVVXming WhaW Whe Uoom iV 10F ZaUmeU Whan oXWVide aiU, Whe coUUeVponding UelaWiYe hXmidiW\\ iV 45% in Whe Uoom, UoXnded Xp Wo 50% RH. In Whe ZinWeU oXWVide aiU haV a higheU hXmidiW\\ bXW once WhaW aiU iV heaWed iW becomeV YeU\\ dU\\,

Whe C-1815 loZeU limiW iV 10% RH. TheUefoUe, a change of 40% RH iV Whe ma[imXm e[pecWed change aW Whe deYice locaWion.

DRH = 0.26%(40%/30%)*1057 pVi DRH = 3.66 pVi Time-DependenW DUifW, DTD BecaXVe Whe WempeUaWXUe and RelaWiYe HXmidiW\\ dUifW WeVWing Wook place oYeU an e[Wended peUiod of Wime, Whe Wime-dependenW dUifW iV conVideUed Wo be inclXded in Whe TempeUaWXUe and RelaWiYe HXmidiW\\ dUifW facWoUV.

FoU conVeUYaWiVm a nominal dUifW of DTD = 2 pVi iV aVVXmed.

ToWal DUifW D The WempeUaWXUe UelaWed dUifW (DT) and hXmidiW\\ UelaWed dUifW (DRH) aUe dependenW YaUiableV and aUe WheUefoUe added WogeWheU. The VXm of WheVe dUifWV iV RMS combined ZiWh Whe Wime dependenW dUifW (DTD) Wo deWeUmine Whe WoWal dUifW (D).

D = ((DT + DRH)2 + DTD2)0.5 D = ((5.26 pVi+ 3.66 pVi)2 + 22)0.5 D = 9.15 pVi conVeUYaWiYel\\ 10 pVi TheUefoUe, a dUifW YalXe of 10 pVig Zill be XVed.

TheUefoUe, Whe Nominal TUip SeWpoinW limiWV aUe:

NTSPXppeU = ALXppeU - (1.645/n)*(Aacc2 + Cacc2 + D2)

NTSPXppeU = 445 +/- 1.645/1 * (0.6252 + 0.6252 + 102)

NTSPXppeU = 428.5 pVig

EC-080-1006 Page 20 NTSPloZeU = ALloZeU + (1.645/n)*(Aacc2 + Cacc2 + D2)

NTSPloZeU = 380 + 1.645/1 * (0.6252 + 0.6252 + 102)

NTSPloZeU = 396.5 pVig The Nominal TUip SeWpoinW Zill be eVWabliVhed aW Whe midpoinW of Whe UppeU and LoZeU NTSP.

NTSP = (428.5 pVig + 396.5 pVig)/2 = 412.5 pVig AV FoXnd ToleUance (WAF)

The NTSP alloZV a nominal WAF-UPPER and WAF-LOWER= 30.5 pVig WAF-UPPER = AVXppeU +/- NTSP = 443 pVig +/- 412.5 pVig = 30.5 pVig WAF-LOWER = NTSP +/- AVloZeU = 412.5 pVig +/- 382 pVig = 30.5 pVig DeYice SeWpoinW (DS)

The DeYice SeWpoinW (DS) iV Whe NTSP offVeW b\\ Whe VWaWic head in Whe VenVing line DS = NTSP + PHC Head CoUUecWion The UefeUence leg VWaWic head pUeVVXUe deWeUmined b\\ EC-INST-4039, EC-INST-4040, EC-INST-1509 and EC-INST-1510.

PIS-B21-1N021 CaOF PHC (SVL) USSHU PHC (SVL) LRZHU A

EC-INST-1509 13.6 13.6 B

EC-INST-4039 12.7 12.7 C

EC-INST-1510 23.0 21.4 D

EC-INST-4040 23.0 21.4 PIS-B21-1N021C, D aUe meaVXUed fUom a RPV LeYel VenVing line YaUiable Wap, Vo Whe VWaWic head iV YaUiable ZiWh Whe ZaWeU leYel in Whe RPV (Vee EC-INST-1510 and EC-INST-4040). ThiV VeWpoinW iV moVW likel\\ Wo be Ueached ZiWh loZ ZaWeU leYel in Whe ReacWoU VeVVel, Vo Whe LoZeU head coUUecWion YalXe iV XVed. The VeWpoinW iV offVeW b\\ <2 pVi aW higheU UeacWoU ZaWeU leYel.

PIS-B21-1N021 NTSP (SVLJ)

PHC (SVL)

DS (SVLJ)

A 412.5 13.6 426.1 B

412.5 12.7 425.2 C

412.5 21.4 433.9 D

412.5 21.4 433.9

EC-080-1006 Page 21 AV-LefW ToleUance The AV-LefW WoleUance iV Whe alloZed YaUiaWion in Whe deYice VeWpoinW WhaW Zill Uemain ZiWhin Whe Uange of accepWable VeWpoinWV. ThiV Uange iV Whe diffeUence beWZeen Whe XppeU and loZeU NTSP limiWV.

WAL* < (NTSPUPPER +/- NTSPLOWER)/2 WAL* < (428.5 +/- 396.5)/2 WAL* < 16.0 pVi

BecaXVe of VZiWch VWabiliW\\ iVVXeV, Whe AV-LefW ToleUance VhoXld be minimi]ed.

HiVWoUicall\\ 5 pVi haV been XVed (Vee SI-1/280-301).

ReVXlWV:

IQVWUXPHQW PSB211N021 AL (SVLJ)

AV (SVLJ)

NTSP (SVLJ)

DS (SVLJ)

WAL (SVL)

WAF (SVL)

A - LOWER 380 382 412.5 426.1 5

16.0 A - UPPER 445 443 16.0 B - LOWER 380 382 412.5 425.2 5

16.0 B - UPPER 445 443 16.0 C - LOWER 380 382 412.5 433.9 5

16.0 C - UPPER 445 443 16.0 D - LOWER 380 382 412.5 433.9 5

16.0 D - UPPER 445 443 16.0 Technical SpecificaWionV (TS) and Technical ReTXiUemenWV ManXal (TRM)

The cXUUenW Technical SpecificaWion VeWpoinW and AlloZable ValXeV aUe Vpecified in LCO Table 3.3.5.1-1 (laVW changed AmendmenW 155).

ECCS S\\VWHP TabOH 3.3.5.1-1 FXQFWLRQ AV LRZHU CXUUHQW AV LRZHU PURSRVHG AV USSHU CXUUHQW AV USSHU PURSRVHG CoUe SpUa\\

1.c, 1.d 407 pVig 382 pVig 433 pVig 443 pVig LPCI 2.c, 2.d 407 pVig 382 pVig 433 pVig 443 pVig The AlloZable ValXe limiWV deWeUmined in WhiV appendi[ (AVLOWER 401.45 pVig and AVUPPER 438.5 pVig) aUe conVeUYaWiYe ZiWh UeVpecW Wo Whe cXUUenW and pUopoVed TS.

The cXUUenW TRM Nominal TUip SeWpoinW limiWV (TRM DaWe 02/02/2010) aUe Vpecified in Table 2.2-1:

ECCS S\\VWHP TabOH 2.2-1 FXQFWLRQ LRZHU NTSP CXUUHQW NTSP LRZHU PURSRVHG NTSP USSHU CXUUHQW NTSP USSHU PURSRVHG CoUe SpUa\\

2.2.3.1.3 413 pVig 396.5 pVig 427 pVig 428.5 pVig LPCI 2.2.3.2.3 413 pVig 396.5 pVig 427 pVig 428.5 pVig

EC-080-1007 Page 14 ASSHQGL[ A SeWpoinW DeWeUminaWion Wo SXppoUW TS Change (LDCNV 5633-5636, PLAV-7950 and 7979)

EC-080-1007 Page 15 ObMHFWLYH: ThiV appendi[ Zill deWeUmine neZ Anal\\Wical LimiW, AlloZable ValXe, Nominal TUip SeWpoinW, PUoceVV (DeYice) SeWpoinW, and AV-FoXnd and AV-LefW ToleUanceV foU inVWalled CoUe SpUa\\ and RHR +/- LPCI InjecWion on LoZ ReacWoU VeVVel PUeVVXUe, PISB212N021A-D. TheVe neZ VeWpoinWV VXppoUW Whe Technical SpecificaWion change VXbmiWWal Wo Whe NRC (LDCNV 5633 +/-

5636 and PLAV-7950 and 7979).

DHVFULSWLRQ: BaUWon 288 dP VZiWcheV aUe XVed in a gaXge pUeVVXUe applicaWion Wo moniWoU UeacWoU VWeam dome pUeVVXUe. TheVe VZiWcheV pUoYide a loZ pUeVVXUe peUmiVViYe foU LPCI and CoUe SpUa\\ V\\VWem injecWion and high-pUeVVXUe iVolaWion of Whe LPCI/CS injecWion lineV Wo pUoWecW Whem fUom oYeUpUeVVXUe. The AlloZable ValXe foU WheVe VeWpoinWV aUe conWUolled in Whe Technical SpecificaWionV; Whe nominal WUip VeWpoinWV aUe conWUolled in Whe Technical ReTXiUemenWV ManXal.

The VZiWcheV¶ noUmal opeUaWing pUeVVXUe iV Whe UeacWoU VWeam dome pUeVVXUe plXV Whe VenVing line head, UefeUenced Wo aWmoVpheUe.

The VZiWcheV aUe noW being Ueplaced aV paUW of Whe Technical SpecificaWion change.

CRQFOXVLRQV aQG RHFRPPHQGaWLRQV IQVWUXPHQW PSB212N021 AL (SVLJ)

AV (SVLJ)

NTSP (SVLJ)

DS (SVLJ)

WAL (SVL)

WAF (SVL)

A - LOWER 380 382 412.5 426.1 5

16.0 A - UPPER 445 443 16.0 B - LOWER 380 382 412.5 425.2 5

16.0 B - UPPER 445 443 16.0 C - LOWER 380 382 412.5 433.9 5

16.0 C - UPPER 445 443 16.0 D - LOWER 380 382 412.5 433.9 5

16.0 D - UPPER 445 443 16.0 AVVXPSWLRQV / IQSXWV

1. DCP 97-9076 Ueplaced Whe oUiginal BaUkVdale pUeVVXUe VZiWch ZiWh a BaUWon pUeVVXUe indicaWing VZiWch.

2. The coUe VpUa\\ and RHR piping conWainV boWh high and loZ pUeVVXUe piping. To pUeYenW oYeU-pUeVVXUe of Whe loZ pUeVVXUe piping on WheVe V\\VWemV, Whe V\\VWemV conWain a check YalYe on Whe high pUeVVXUe piping Wo pUeYenW oYeU pUeVVXUe of Whe loZ pUeVVXUe piping (RHR Check ValYe +/-

HV1(2)51F050A/B and CoUe SpUa\\ +/- HV1(2)52F006A/B). In Whe Technical SpecificaWion change VXbmiWWal Wo Whe NRC (LDCNV 5633 +/- 5636, PLAV-7950 and 7979), WheVe check YalYeV aUe cUediWed aV Whe Vingle failXUe pUoof meWhod of pUeYenWing oYeU-pUeVVXUi]aWion of Whe loZ pUeVVXUe piping. Since Whe check YalYeV pUoYide oYeU pUeVVXUe pUoWecWion, Whe UeacWoU pUeVVXUe open peUmiVViYe foU Whe V\\VWem injecWion YalYeV (RHR InjecWion ValYe +/- HV1(2)51F015A/B and CoUe SpUa\\ +/- HV1(2)52F005A/B) and Whe UeacWoU pUeVVXUe peUmiVViYe foU Whe RHR and CoUe SpUa\\ pXmp VWaUWV aUe being UemoYed fUom Whe Technical SpecificaWionV. NoWe Whe ma[imXm deYeloped head of Whe RHR and CoUe SpUa\\ pXmpV Zill noW caXVe a pipe oYeU pUeVVXUe condiWion.

EC-080-1007 Page 16 EYen WhoXgh Whe UeacWoU pUeVVXUe open peUmiVViYe foU Whe V\\VWem injecWion YalYeV and Whe coUe VpUa\\ and RHR UeacWoU pUeVVXUe pXmp VWaUW peUmiVViYe aUe being UemoYed fUom Whe planW Technical SpecificaWionV, Whe peUmiVViYe logic iV VWill UeTXiUed peU FSAR SecWion 7.3 and Zill be mainWained in Whe planW. The NRC haV UeTXeVWed VXpplemenWal infoUmaWion (NRC ADAMS aVcenVion nXmbeU ML21316A124) on Whe oUiginal SSES VXbmiWWal UeTXeVW. AfWeU diVcXVVion ZiWh Whe NRC, SSES haV decided Wo Ue-implemenW Whe XppeU pUeVVXUe peUmiVViYe limiW (PLA-7979).