PLA-7881, Submittal of Unit 2 Cycle 21 Safety Limit Minimum Critical Power Ratio Report to Support License Amendment Requesting Application of Advanced Framatome Methodologies (PLA-7881)

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Submittal of Unit 2 Cycle 21 Safety Limit Minimum Critical Power Ratio Report to Support License Amendment Requesting Application of Advanced Framatome Methodologies (PLA-7881)
ML20212L631
Person / Time
Site: Susquehanna  Talen Energy icon.png
Issue date: 07/30/2020
From: Cimorelli K
Susquehanna, Talen Energy
To:
Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML20212L630 List:
References
PLA-7881
Download: ML20212L631 (15)
v • d • e


Text

Enclosure 1 Contains Proprietary Information -

Withhold in Accordance with 10 CFR 2.390 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 July 30, 2020 Attn: Document Control Desk 10 CFR 50.90 U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 SUSQUEHANNA STEAM ELECTRIC STATION SUBMITTAL OF UNIT 2 CYCLE 21 SAFETY LIMIT MINIMUM CRITICAL POWER RATIO REPORT TO SUPPORT LICENSE AMENDMENT REQUESTING APPLICATION OF ADVANCED FRAMATOME METHODOLOGIES Docket No. 50-387 PLA-7881 and 50-388

Reference:

1) Susquehanna letter to NRC, Proposed Amendment to Licenses NPF-14 and NPF-22: Application of Advanced Framatome Methodologies and TSTF-535 (PLA-7783), dated July 15, 2019 (ADAMS Accession No. ML19196A270).
2) Susquehanna letter to NRC, Submittal of Unit 2 Cycle 21 Reload Licensing Documents to Support License Amendment Requesting Application of Advanced Framatome Methodologies (PLA-7861), dated April 9, 2020 (ADAMS Accession No. ML20100F921).

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 Susquehanna Steam Electric Station (SSES), Units 1 and 2, Facility Operating License numbers NPF-14 and NPF-22. The proposed amendment would revise TS 5.6.5.b to allow application of Advanced Framatome Methodologies for determining core operating limits in support of loading Framatome fuel type ATRIUM 11, revise the low pressure safety limit in TS 2.1.1.1 and TS 2.1.1.2, and remove the neutronic methods penalties on Oscillation Power Range Monitor amplitude setpoint and the pin power distribution uncertainty and bundle power correlation coefficient.

Document Control Desk PLA-7881 In Enclosure 7 to Reference 1, Susquehanna committed to provide certain reload licensing documents related to Unit 2, Cycle 21 (i.e., the first cycle expected to be loaded with ATRIUM 11 fuel), within 15 days of their approval. Reference 2 provide the first such reports.

This letter provides the next report: Enclosure 1 provides the Unit 2, Cycle 21 Safety Limit Minimum Critical Power Ratio (MCPR) Report. The report is submitted for infmmation only to aid in the NRC's review of the license amendment requested in Reference 1.

Infmmation provided in Enclosure 1 is considered proprietary to Framatome. The proprietary infmmation has been denoted therein by brackets. As owners of the proprietary information, Framatome has executed an affidavit for the document which identifies the infmmation as proprietary, is customarily held in confidence, and should be withheld from public disclosure in accordance with 10 CFR 2.390. Enclosure 2 provides a non-proprietary version of Enclosure 1.

The Framatome affidavit is included as Enclosure 3.

There are no new or revised regulatory commitments contained in this submittal. This submittal satisfies Regulatory Commitment 7783-3 as documented in Enclosure 7 to Reference 1.

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 petjury that the foregoing is true and correct.

Executed on:

Enclosures:

1. Framatome Report FS1-0051014, Revision 1, "Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results (Proprietary Version)" [Proprietary Information - Withhold from Public Disclosure in accordance with 10 CFR 2.390]
2. Framatome Report FS1-0051015, Revision 1, "Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results (Non-Proprietaty Version)"
3. Framatome Affidavit for FS1-0051014, Revision 1, "Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results (Proprietaty Version)"

Document Control Desk PLA-7881 Copy: NRC Region I Mr. M. Hardgrove, NRC Senior Resident Inspector (Acting)

Ms. S. Goetz, NRC Project Manager Mr. M. Shields, PA DEP/BRP (w/out Enclosure 1)

Enclosure 2 of PLA-7881 Framatome Report FS1-0051015, Revision 1 Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results (Non-Proprietary Version)

IDENTIFICATION REVISION framatome FS1-0051 015 1.0 I II I Framatome Fuel TOTAL NUMBER OF PAGES: 7 Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results (Non-Proprietary Version)

ADDITIONAL INFORMATION:

This is the Non-Proprietary Version of FS1-0051014.

PROJECT SUS2-21 DISTRIBUTION TO PURPOSE OF DISTRIBUTION Robert Follett HANDLING None EIR- Engineering CATEGORY Information Report STATUS This document is electronically approved. Records regarding the signatures are stored in the fsanpexp Documentum docbase. Any attempt to modify this file may subject employees to civil and criminal penalties.

I EDRMS object ld. : 090121.6780f6a91a Released date (YYYYIMM/DD) : 2020107116 21:46:18 Role Name Date (YYYYIMM/DD) Organization Writer HOWLETT Dirk 2020/07/16 20:37:56 Framatome Inc.

Reviewer KING Chad 2020/07/16 21:07:54 Framatome Inc.

Approver ATTARD Anthony 2020/07/16 21:11 :07 Framatome Inc.

Approver SCHNEPP Robert 2020/07/16 21:46:1 8 Framatome Inc.

Classification Ex~ort AL: OE001 ECCN: OE001 RELEASE DATA: Les marchandises portant Ia designation "AL inegal N" sont soumises a Ia reglementation eu ropee nne ou allemande en matiere de contr61e des exportations au sein au hors de I'UE. Les marchandises portant Ia designation "ECCN in8gal N" sont soumises a Ia rE!glementation am8ricaine. Les marchandises portant les designations "AL:N" ou "ECCN:N" peuvent, selon Ia destination ou ]'utilisation finales du produit, E!galement iHre a

soumises autorisatlon.

Ex~ort dassification AL: OE001 ECCN: OE001 Goods labeled INith "AL not equal to N" are subject to European or German export authorization when being exported within or out of the EU. Goods labeled INith "ECCN not equal to W are subject to US reexport authorization . Even wi th out a label, or with labei "AL: Wor~ECCN: N", authorization may be required due to the SAFETY RELATED DOCUMENT: y final v.klereabouts and purpose for which the goods are to be used.

Ex(;!ortkennzeichnung AL: OE001 ECCN: OE001 CHANGE CONTROL RECORDS: France: N Die mit "AL ungleich N" gekennzeichneten GOter unterliegen bei der Ausfuhr aus der EU bzw.

This document, when revised, must be USA: y innergemeinschaftlichen Verbringung der europ§ischen bzw. deutschen Ausfuhrgenehmigung spflicht. Die mit "ECCN ungleich N" gekennzeichneten GOter unter1iegen der US-Reexportgenehmigungspnicht. Auch ohne reviewed or approved by following regions : Germany: N Ken nzeichen, bzw. bei Kennzeichen "AL: N" oder "ECCN: N", kann sich eine Genehmigungspnicht, unter anderem durch den Endverbleib und Verwendungszweck der GOter, erg eben.

CWOIL Rev. 5.4-12/05/20

No FS1-0051015 Rev. 1.0 Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results framatome Handling: None Page 2/7 (Non-Proprietary Version)

REVISIONS REVISION DATE EXPLANATORY NOTES 1.0 See 151 page New document.

release date This is the Non-Proprietary Version of FS1-0051014.

ATRIUM is a trademark or registered trademark of Framatome, Inc. or its affiliates, in the USA or other countries.

Framatome - Fuel This document is sub* ect to the restrictions set forth on the first or title a e

No FS1-0051015 Rev. 1.0 Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results framatome Handling: None Page 3/7 (Non-Proprietary Version)

1. PURPOSE This document summarizes the cycle-specific MCPR safety limit (SLMCPR) analysis results for Susquehanna Unit 2 Cycle 21.
2. METHODOLOGY The two-loop operation (TLO) and single-loop operation (SLO) safety limit minimum critical power ratios (SLMCPR) are determined using the methodology presented in Reference 1. The SLMCPR is defined as the minimum value of the critical power ratio which ensures at least 99.9% of the fuel rods in the core avoid boiling transition (BT) during normal operation or an anticipated operational occurrence (AOO). The SLMCPR is determined using a statistical analysis employing a Monte Carlo process that perturbs the input parameters used in the calculation of minimum critical power ratio (MCPR). The set of uncertainties used in the statistical analysis includes both fuel-related and plant-related uncertainties.

The SLMCPR analysis is performed with a power distribution that conservatively represents expected reactor operating states that could both exist at the operating limit MCPR (OLMCPR) and produce a MCPR equal to the SLMCPR during an AOO. (

]

In the Framatome methodology, the effects of channel bow on the critical power performance are accounted for in the SLMCPR analysis. [

]

Framatome - Fuel This document is sub"ect to the restrictions set forth on the first or title a e

No FS1-0051015 Rev. 1.0 Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results framatome Handling: None Page 4/7 (Non-Proprietary Version)

[

] This adjustment is a plant specific extension of the Reference 1 approved methodology (Reference 2).

3. ANALYSIS The core loading and cycle depletion from the Susquehanna Unit 2 Cycle 21 fuel cycle design (Reference 3) was used as the basis of the SLMCPR analysis. The cycle is made up of ATRIUM-10 and ATRIUM 11 fuel. Analyses were performed for the minimum and maximum core flow conditions associated with rated power for the Susquehanna Unit 2 power/flow map. The SLO calculations used a core flow of 52% of rated and a core power of 67.1% of rated.

The ACE/ATRIUM 11 critical power correlation (Reference 4) is used to evaluate the thermal margin of the ATRIUM 11 fuel while the SPCB critical power correlation (Reference 5) is used for the ATRIUM-10 fuel.

The uncertainties used in the SLMCPR analysis are presented in Table 1. The radial and nodal power uncertainties used in the analysis include the combined effects of up to 42% of the traversing in-core probe (TIP) channels out-of-service, up to 50% of the local power range monitors (LPRM) out-of-service, and an LPRM calibration interval of up to 2,500 effective full power hours (EFPH). For the Susquehanna Unit 2 Cycle 21 fuel cycle design, [

]

4. RESULTS The SLMCPR analysis supports a TLO SLMCPR of 1.06 and an SLO SLMCPR of 1.07. Table 2 and Table 3 present a summary of the analysis results including the SLMCPR and the percentage of rods expected to experience BT. Therefore, the current Technical Specification SLMCPRs of 1.08 and 1.11 for TLO and SLO, respectively (Reference 9, Amendment 242, Section 2.1.1.2), continue to be supported for Susquehanna Unit 2 Cycle 21.

Framatome - Fuel This document is sub'ect to the restrictions set forth on the first or title a e

No FS1 -0051015 Rev. 1.0 Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results framatome Handling: None Page 5/7 (Non-Proprietary Version)

5. REFERENCES
1. ANP-1 0307PA Revision 0, ARE VA MCPR Safety Limit Methodology for Boiling Water Reactors, AREVA NP Inc., June 2011.
2. ANP-3753P Revision 2, Applicability of Framatome BWR Methods to Susquehanna with ATRIUM 11 Fuel, Framatome Inc., March 2020.
3. ANP-3826P Revision 0, Susquehanna Unit 2 Cycle 21 Fuel Cycle Design Report, Framatome Inc. ,

March 2020.

4. ANP-10335P-A Revision 0, "ACE/ATRIUM 11 Critical Power Correlation," Framatome Inc.,

May 2018.

5. EMF-2209(P)(A) Revision 3, SPCB Critical Power Correlation, AREVA NP Inc., September 2009.
6. ANP-3829P Revision 0, Susquehanna Unit 2 Cycle 21 Principal Plant Parameters, Framatome Inc., June 2020.
7. EMF-2493(P) Revision 0, MICROBURN-B2 Based Impact of Failed/Bypassed LPRMs and TIPs, Extended LPRM Calibration Interval, and Single Loop Operation on Measured Radial Bundle Power Uncertainty, Siemens Power Corporation, December 2000.
8. EMF-2158(P)(A) Revision 0, Siemens Power Corporation Methodology for Boiling Water Reactors:

Evaluation and Validation of CASM0-4/MICROBURN-B2, Siemens Power Corporation, October 1999.

9. Susquehanna Steam Electric Station Unit 2 Technical Specifications.

Framatome - Fuel This document is sub'ect to the restrictions set forth on the first or title a e

No FS1-0051 015 Rev. 1.0 Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results framatome Handling: None Page 6/7 (Non-Proprietary Version)

Table 1 Safety Limit Uncertainties Standard Parameter Deviation Reference Reactor System Related Uncertainties Feedwater flow rate 1.76% 6 Feedwater temperature 0.76% 6 Core Pressure 0.50% 6 Total core flow rate 6 Two-loop 2.50%

Single-loop 6.00%

Fuel Related Uncertainties

[

]

[

]

[

]

Framatome - Fuel This document is sub'ect to the restrictions set forth on the first or title a e

No FS1-0051015 Rev. 1.0 Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results framatome Handling : None Page 7/7 (Non-Proprietary Version)

Table 2 Two-Loop Operation Safety Limit Results

%Rated %Rated Limiting Exposure Number of %of Power Flow SLMCPR (MWd/MTU) Rods in BT* Rods in BT 100 108 1.06 16,700 52 0.0686 100 99 1.06 16,500, 16,700, 48 0.0633 and 16,849 Table 3 Single-Loop Operation Safety Limit Results

%Rated %Rated Limiting Exposure Number of %of Power Flow SLMCPR (MWd/MTU) Rods in BT* Rods in BT 67.1 52 1.07 16,700 60 0.0791

  • The total number of heated rods in the core is 75,824. Therefore, the maximum allowable number of BT rods is 75.

Framatome- Fuel This document is sub"ect to the restrictions set forth on the first or title a e

Enclosure 3 of PLA-7881 Framatome Affidavit for FS1-0051014, Revision 1, Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results (Proprietary Version)

AFFIDAVIT

1. My name is Alan B. Meginnis. I am Manager, Product Licensing, for Framatome Inc. and as such I am authorized to execute this Affidavit.
2. I am familiar with the criteria applied by Framatome to determine whether certain Framatome information is proprietary. I am familiar with the policies established by Framatome to ensure the proper application of these criteria.

I

3. I am familiar with the Framatome information contained in the r~port FS1-0051014, Revision 1, "Susquehanna Unit 2 Cycle 21 MCPR Safety Limit Results," dated July 2020 and referred to herein as "Document." Information contained in this Do*cument has been classified by Framatome as proprietary in accordance with the policies established by Framatome for the control and protection of proprietary and confidential information.
4. This Document contains information of a proprietary and confidential nature and is of the type customarily held in confidence by Framatome and not made available to the public. Based on my experience, I am aware that other companies regard information of the kind contained in this Document as proprietary and confidential.
5. This Document has been made available to the U.S. Nuclear Regulatory Commission in confidence with the request that the information contained in this Document be withheld from public disclosure. The request for withholding of proprietary information is made in accordance *with 10 CFR 2.390. The information for which withholding from disclosure is requested qualifies under 10 CFR 2.390(a)(4) "Trade secrets and commercial or financial information."
6. The following criteria are customarily applied by Framatome to determine whether information should be classified as proprietary:

(a) The information reveals details of Framatome's research and development plans and programs or their results.

(b) Use of the information by a competitor would permit the competitor to significantly reduce its expenditures, in time or resources, to design, produce, or market a similar product or service.

(c) The information includes test data or analytical techniques concerning a process, methodology, or component, the application of which results in a competitive advantage for Framatome.

(d) The information reveals certain distinguishing aspects of a process, methodology, or component, the exclusive use of which provides a competitive advantage for Framatome in product optimization or marketability.

(e) The information is vital to a competitive advantage held by Framatome, would be helpful to competitors to Framatome, and would likely cause substantial harm to the competitive position of Framatome.

The information in the Document is considered proprietary for the reasons set forth in paragraphs 6(b), 6(d) and 6(e) above.

7. In accordance with Framatome's policies governing the protection and control of information, proprietary information contained in this Document have been made available, on a limited basis, to others outside Framatome only as required and under suitable agreement providing for nondisclosure and limited use of the information.
8. Framatome policy requires that proprietary information be kept in a secured file or area and distributed on a need-to-know basis.
9. The foregoing statements are true and correct to the best of my knowledge, information, and belief.

I declare under penalty of pe~ury that the foregoing is true and correct.

Executed on: July 15, 2020

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