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| {{#Wiki_filter:}} | | {{#Wiki_filter:From: Vaidya, Bhalchandra Sent: Monday, July 26, 2021 7:14 AM To: Taken, Jason C.:(Exelon Nuclear); 'david.gullott@exeloncorp.com' |
| | |
| | ==Subject:== |
| | LA SALLE UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION (RAI) |
| | RE: License Amendment Request to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, "GNF CRDA Application Methodology"(EPID-L-2021-LLA-0016) |
| | |
| | ==SUBJECT:== |
| | LASALLE UNITS 1 AND 2 -REQUEST FOR ADDITIONAL INFORMATION (RAI) |
| | RE: License Amendment Request to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, "GNF CRDA Application Methodology" (EPID-L-2021-LLA-0016) |
| | Jason and David, By letter to the U.S. Nuclear Regulatory Commission (NRC) dated February 10, 2021 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML21041A490), Exelon Generation Company, LLC (EGC, the licensee) submitted a request to amend Technical Specification (TS) Sections TS 3.1.3, "Control Rod Operability," TS 3.1.6, "Rod Pattern Control," and TS 3.3.2.1, "Control Rod Block Instrumentation," to allow for greater flexibility in rod control operations during various stages of reactor power operation at LaSalle County Station, Units 1 and 2 (LSCS). The proposed amendment will incorporate NRC approved methodology described in Licensing Topical Report, GNF CRDA Application Methodology, NEDE-33885P-A, Revision 1 (ADAMS Package Accession No. ML20091K212). |
| | The U.S. Nuclear Regulatory Commission (NRC) staff currently reviewing your submittals and has identified areas where additional information is needed to complete its review. The Request for Additional Information (RAI) is provided below. |
| | ======================================================================== |
| | ===================== |
| | REQUEST FOR ADDITIONAL INFORMATION OFFICE OF NUCLEAR REACTOR REGULATION Exelon Generation Co., LLC DOCKET NOS. 50-373, AND 50-374 EPID: L-2021-LLA-0016 RAI-SNSB-1: |
| | By {{letter dated|date=February 10, 2021|text=letter dated February 10, 2021}} (Agencywide Documents Access and Management System (ADAMS) Accession No. ML21041A490), the Exelon Generation Company, LLC, the licensee for LaSalle County Station, Units 1 and 2 (LSCS), submitted a request to amend the Technical Specifications (TSs), as necessary, to implement new control rod TS requirements associated with the NRC approved methodology described in Licensing Topical Report, GNF CRDA Application Methodology, NEDE-33885P-A, Revision 1 (ADAMS Package Accession No. ML20091K212). |
| | Regulatory Requirement LSCS were designed to comply with the Nuclear Regulatory Commission (NRC), General Design Criteria (GDC) for Nuclear Power Plant Construction Permits. The regulatory |
| | |
| | requirements and guidance documents that the NRC staff considered in its review of the proposed amendment included the following: |
| | General Design Criterion 28, Reactivity limits. The reactivity control systems shall be designed with appropriate limits on the potential amount and rate of reactivity increase to assure that the effects of postulated reactivity accidents can neither (1) result in damage to the reactor coolant pressure boundary greater than limited local yielding nor (2) sufficiently disturb the core, its support structures or other reactor pressure vessel internals to impair significantly the capability to cool the core. These postulated reactivity accidents shall include consideration of rod ejection (unless prevented by positive means), rod dropout, steam line rupture, changes in reactor coolant temperature and pressure, and cold water addition. |
| | The Issue of concern In the {{letter dated|date=February 10, 2021|text=February 10, 2021, letter}}, the licensee mentions Appendix B, "Interim Acceptance Criteria and Guidance for the Reactivity Initiated Accidents," to Chapter 4.2, "Fuel System Design," of the Standard Review Plan (NUREG-0800, or SRP), as well as a proposed draft guide, DG-1327, "USNRC Draft Regulatory Guide DG-1327, Pressurized-Water Reactor Control Rod Ejection and Boiling-Water Reactor Control Drop Accidents." Both are referenced in NEDE-33885P-A, Revision 1. Since NEDE-33885P-A was issued, DG-1327 was revised and published as Regulatory Guide 1.236, Pressurized-Water Reactor Control Rod Ejection and Boiling-Water Reactor Control Drop Accidents, June 2020. While the form of the acceptance criteria for determining fuel rod failures in all three documents are consistent with what the NRC staff considered as part of their review of NEDE-33885P-A, the actual failure thresholds differ somewhat in each document. The licensee does not specify which acceptance criteria it plans it use to determine whether fuel rod failure occurs as part of their use of NEDE-33885P-A. |
| | Request for Additional Information The licensee needs to explicitly clarify which acceptance criteria it plans to use in determining when fuel failure is expected to occur based on the results of the NEDE-33885P-A analyses, and as appropriate, justify the use of the specified acceptance criteria. |
| | ======================================================================== |
| | ========== |
| | A clarification telephone call was held between the NRC staff and licensee on July 23, 2021. |
| | The licensee agreed during the clarification call to respond to the RAI no later than 30 days from the date of this communication. |
| | If you have any questions, please contact me at (301) 415-3308, or by email at bhalchandra.vaidya@nrc.gov Bhalchandra K. Vaidya US Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Division of Operating Reactor Licensing LPL3 301-415-3308 Bhalchandra.vaidya@nrc.gov |
| | |
| | Hearing Identifier: NRR_DRMA Email Number: 1289 Mail Envelope Properties (SJ0PR09MB6415DFF799F78158CF55F9E68DE89) |
| | |
| | ==Subject:== |
| | LA SALLE UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION (RAI) RE: License Amendment Request to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, "GNF CRDA Application Methodology"(EPID-L-2021-LLA-0016) |
| | Sent Date: 7/26/2021 7:14:12 AM Received Date: 7/26/2021 7:14:00 AM From: Vaidya, Bhalchandra Created By: Bhalchandra.Vaidya@nrc.gov Recipients: |
| | "Taken, Jason C.:(Exelon Nuclear)" <Jason.Taken@exeloncorp.com> |
| | Tracking Status: None |
| | "'david.gullott@exeloncorp.com'" <david.gullott@exeloncorp.com> |
| | Tracking Status: None Post Office: SJ0PR09MB6415.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 5319 7/26/2021 7:14:00 AM Options Priority: Normal Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:}} |
Letter Sequence RAI |
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EPID:L-2021-LLA-0016, NRR E-mail Capture - (External_Sender) IEMA Response: State Consultation - LaSalle 1 and 2: License Amendment Request Re; Revision of Technical Specifications to Incorporate GNF CRDA Methodology (Approved, Closed) |
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MONTHYEARNMP1L3371, Summary of Changes, Quality Assurance Topical Report, NO-AA-10 & Decommissioning Quality Assurance Program, NO-DC-102021-02-10010 February 2021 Summary of Changes, Quality Assurance Topical Report, NO-AA-10 & Decommissioning Quality Assurance Program, NO-DC-10 Project stage: Request RS-21-006, Application to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, GNF CRDA Application Methodology2021-02-10010 February 2021 Application to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, GNF CRDA Application Methodology Project stage: Request ML21062A2022021-03-0303 March 2021 NRR E-mail Capture - La Salle, - Acceptance of Requested Licensing Action License Amendment Application to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, GNF CRDA Application Methodology (EPID-L-2021-LLA-0016) Project stage: Acceptance Review ML21207A0072021-07-26026 July 2021 NRR E-mail Capture - La Salle Units 1 and 2 - Request for Additional Information (RAI) License Amendment Request to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, GNF CRDA Application Methodology(EPID-L-2021-LLA-0016) Project stage: RAI RS-21-085, Response to Request for Additional Information Regarding License Amendment Request to Incorporate Licensing Topical Report NEDE-33885PA, Revision 1, GNF CRDA Application Methodology (EPID-L-2021-LLA-0016)2021-08-17017 August 2021 Response to Request for Additional Information Regarding License Amendment Request to Incorporate Licensing Topical Report NEDE-33885PA, Revision 1, GNF CRDA Application Methodology (EPID-L-2021-LLA-0016) Project stage: Response to RAI ML22020A0692022-01-14014 January 2022 NRR E-mail Capture - (External_Sender) IEMA Response: State Consultation - LaSalle 1 and 2: License Amendment Request Re; Revision of Technical Specifications to Incorporate GNF CRDA Methodology Project stage: Request ML21362A7212022-02-0404 February 2022 Issuance of Amendment Nos. 255 and 241 Revision to Technical Specifications to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, GNF CRDA Application Methodology Project stage: Approval 2021-07-26
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Category:E-Mail
MONTHYEARML23328A0132023-11-22022 November 2023 Supplement - Security Rule Exemption Request ISFSI Docket No. Reference (L-2023-LLE-0028) ML23304A0162023-10-30030 October 2023 NRR E-mail Capture - Final RCI - Constellation Energy Generation, LLC - LaSalle 1 & 2 - Exemption from Security Rule (L-2023-LLE-0028) ML23268A0022023-09-22022 September 2023 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of License Amendment Request to Adopt TSTF-264-A, Revision 0 ML23264A7992023-09-21021 September 2023 NRR E-mail Capture - Final RAI - Constellation Energy Generation, LLC Fleet Request License Amendment Request to Adopt TSTF-580, Revision 1 ML23237B3972023-08-24024 August 2023 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of Alternative Request to Use Updated BWRVIP Guidelines ML23163A2292023-06-12012 June 2023 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of License Amendment Request to Adopt TSTF-580, Revision 1 ML23153A1562023-06-0202 June 2023 NRR E-mail Capture - RAI LaSalle pressure-temperature Limits Report (PTLR) Amendment Request ML23151A6602023-05-31031 May 2023 NRR E-mail Capture - LaSalle County Station, Units 1 and 2 - Acceptance of I4R-14 ML23150A2482023-05-25025 May 2023 NRR E-mail Capture - RAI Re LaSalle Downcomer Analysis Amendment Request ML23095A1892023-04-0505 April 2023 NRR E-mail Capture - LaSalle County Station, Units 1 and 2 - Audit Plan PTLR Amendment Request ML23074A0372023-03-14014 March 2023 NRR E-mail Capture - (External_Sender) Implementation of Exigent Amendment ML23044A0452023-02-13013 February 2023 NRR E-mail Capture - LaSalle County Station, Units 1 and 2 - Acceptance of Requested Licensing Action License Amendment Request to Revise Lower Downcomer Braces Analysis ML23046A1132023-02-13013 February 2023 Transmittal Email, Paul Bessette to Gibson, 2/13/23, Filing of Formal Opposition to PG&E Exemption Request ML23052A2042023-01-10010 January 2023 E-mail from Paul Bessette Dated 01/10/2023 Regarding Diablo Canyon ML22357A0382022-12-23023 December 2022 NRR E-mail Capture - LaSalle County Station, Units 1 and 2 - Acceptance of Requested Licensing Action License Amendment Request to Relocate the Pressure and Temperature Limit Curves ML22354A2622022-12-20020 December 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of Request to Use Certain Provisions of the 2019 Edition of the ASME BPV Code, Section XI ML22301A0902022-10-28028 October 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request - Acceptance of License Amendment Request to Adopt TSTF-301, Revision 2 ML22256A0112022-09-12012 September 2022 NRR E-mail Capture - Request for Additional Information LaSalle County Station, Units 1 and 2 and Quad Cities Nuclear Power Station, Units 1 and 2 License Amendments Related to Fuel Storage ML22200A0782022-07-19019 July 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Fleet Request to Use Honeywell Mururoa V4F1 R Supplied Air Suits ML22138A4112022-05-18018 May 2022 NRR E-mail Capture - Lasalle 1 and 2 - (RAI) License Amendment Request Regarding New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies, with Changes to TS Sections 4.3.1 and 5.6.5 (EPID-L-2021-LLA-0124) ML22126A0392022-05-0606 May 2022 NRR E-mail Capture - Lasalle 1 and 2 Draft (RAI) License Amendment Request Regarding New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies, with Proposed Changes to TS Sections 4.3.1 and 5.6.5 ML22066A7622022-03-0707 March 2022 NRR E-mail Capture - Verbal Authorization - EPID-L-2022-LLR-0028, LaSalle Unit 1 Request for Alternative Examination for Repairs of Flow Control Valves 1B33-F060A and 1B33-F060B ML22062B0232022-03-0303 March 2022 NRR E-mail Capture - EPID-L-2022-LLR-0028, LaSalle Unit 1, Request for Additional Information (Rai), LaSalle Unit 1, Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs ML22041B5362022-02-10010 February 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Request for Additional Information Regarding Fleet License Amendment Request to Adopt TSTF-541 ML22020A0692022-01-14014 January 2022 NRR E-mail Capture - (External_Sender) IEMA Response: State Consultation - LaSalle 1 and 2: License Amendment Request Re; Revision of Technical Specifications to Incorporate GNF CRDA Methodology ML22020A0642022-01-13013 January 2022 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative for Repair of Water Level Instrumentation Partial Penetration Nozzles ML21361A2982021-12-0606 December 2021 NRR E-mail Capture - (External_Sender) Control Rod Drop Accident (CRDA) Implementation Schedule ML21301A0672021-10-28028 October 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Amendment Request to Adopt TSTF-541 ML21256A1902021-09-10010 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21252A0482021-09-0707 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet Alternative Request for Repair of Water Level Instrumentation Partial Penetration Nozzles ML21215A3502021-08-0303 August 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Amendment Request to Adopt TSTF-554 ML21210A0942021-07-29029 July 2021 NRR E-mail Capture - La Salle, 1 & 2 - Acceptance of Licensing Action License Amendment Request New Fuel Storage Vault and Spent Fuel Pool Criticality Methodologies, with Changes to TS Sections 4.3.1 and 5.6.5 (EPID-L-2021-LLA-0124) ML21207A0072021-07-26026 July 2021 NRR E-mail Capture - La Salle Units 1 and 2 - Request for Additional Information (RAI) License Amendment Request to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, GNF CRDA Application Methodology(EPID-L-2021-LLA-0016) ML21190A0192021-07-0808 July 2021 NRR E-mail Capture - Exelon Fleet - Request for Additional Information Regarding Adoption of TSTF-582 and TSTF-583-T ML21154A0132021-05-28028 May 2021 NRR E-mail Capture - Extension of Comment Period for the Exelon Generation Company, LLC License Transfer Application ML21154A0142021-05-28028 May 2021 NRR E-mail Capture - Extension of Comment Period for the Exelon Generation Company, LLC License Transfer Application ML21154A0112021-05-28028 May 2021 NRR E-mail Capture - Extension of Comment Period for the Exelon Generation Company, LLC License Transfer Application ML21144A2132021-05-24024 May 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21119A2282021-04-29029 April 2021 NRR E-mail Capture - Request for Additional Information (RAI) - LaSalle, EPID-L-2020-LLA-0018, License Amendment Request (LAR) TSTF-505 ML21120A0552021-04-29029 April 2021 NRR E-mail Capture - LaSalle County Station, Units 1 and 2 - Closeout of Bulletin 2012-01, Design Vulnerability in Electric Power System ML21117A0442021-04-26026 April 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Proposed Fleet Alternative to Documentation Requirements for Pressure Retaining Bolting ML21089A0562021-03-30030 March 2021 NRR E-mail Capture - LaSalle Unit 2 - Verbal Authorization of LaSalle Unit 2 Request for an Alternative I4R-12, Revision 2 Valve Repairs on Valves 2B33-F060A and 2B33-F060B ML21084A2532021-03-24024 March 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Acceptance of License Transfer Application ML21082A0252021-03-22022 March 2021 Email to Licensee for Delay in Completion of LAR LAR TSTF-505 ML21084A1292021-03-22022 March 2021 NRR E-mail Capture - Delay in Issuance of the LaSalle TSTF-505 LAR (L-2020-LLA-0018) ML21077A1902021-03-18018 March 2021 NRR E-mail Capture - Lasalle Units 1 and 2 - Request for Additional Information (RAI) Request for License Amendment Regarding Ultimate Heat Sink, (EPID-L-2020-LLA-0165) ML21089A0542021-03-15015 March 2021 NRR E-mail Capture - LaSalle Unit 2 - Verbal Authorization of LaSalle Unit 2 Relief Request I4R-12, Revision 1 Valve Repairs on Valves 2B33-F060A and 2B33-F060B ML21068A2762021-03-0909 March 2021 NRR E-mail Capture - La Salle Units 1 and 2 - Request for Additional Information (RAI) Relief Request I4R-12 Relief from Code Surface Examinations for 2B33-F060B Valve Repair (EPID-L-2020-LLA-0016) ML21067A6752021-03-0808 March 2021 NRR E-mail Capture - La Salle Units 1 and 2 - Request for Additional Information (RAI) UHS Amendment Request (EPID-L-2020-LLA-0165) ML21062A2022021-03-0303 March 2021 NRR E-mail Capture - La Salle, - Acceptance of Requested Licensing Action License Amendment Application to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, GNF CRDA Application Methodology (EPID-L-2021-LLA-0016) 2023-09-22
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARML23360A6082023-12-27027 December 2023 County Station Request for Information for NRC Commercial Grade Dedication Inspection: Inspection Report 05000373/2024010 and 05000374/2024010 ML23264A7992023-09-21021 September 2023 NRR E-mail Capture - Final RAI - Constellation Energy Generation, LLC Fleet Request License Amendment Request to Adopt TSTF-580, Revision 1 ML23208A3182023-07-27027 July 2023 Notification of an NRC Biennial Licensed Operator Requalification Program Inspection and RFI ML23153A1562023-06-0202 June 2023 NRR E-mail Capture - RAI LaSalle pressure-temperature Limits Report (PTLR) Amendment Request ML23150A2482023-05-25025 May 2023 NRR E-mail Capture - RAI Re LaSalle Downcomer Analysis Amendment Request ML23110A3202023-04-21021 April 2023 Information Request to Support the NRC Annual Baseline Emergency Action Level and Emergency Plan Changes Inspection ML22361A0792022-12-27027 December 2022 Notification of NRC Baseline Inspection and Request for Information (05000374/2023001) ML22256A0112022-09-12012 September 2022 NRR E-mail Capture - Request for Additional Information LaSalle County Station, Units 1 and 2 and Quad Cities Nuclear Power Station, Units 1 and 2 License Amendments Related to Fuel Storage ML22138A4112022-05-18018 May 2022 NRR E-mail Capture - Lasalle 1 and 2 - (RAI) License Amendment Request Regarding New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies, with Changes to TS Sections 4.3.1 and 5.6.5 (EPID-L-2021-LLA-0124) ML22126A0392022-05-0606 May 2022 NRR E-mail Capture - Lasalle 1 and 2 Draft (RAI) License Amendment Request Regarding New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies, with Proposed Changes to TS Sections 4.3.1 and 5.6.5 ML22097A0832022-04-0707 April 2022 County Station Information Request for the Cyber-Security Baseline Inspection, Notification to Perform Inspection 05000373/2022403 and 05000374/2022403 ML22062B0232022-03-0303 March 2022 NRR E-mail Capture - EPID-L-2022-LLR-0028, LaSalle Unit 1, Request for Additional Information (Rai), LaSalle Unit 1, Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs ML22041B5362022-02-10010 February 2022 NRR E-mail Capture - Constellation Energy Generation, LLC - Request for Additional Information Regarding Fleet License Amendment Request to Adopt TSTF-541 ML22020A0642022-01-13013 January 2022 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative for Repair of Water Level Instrumentation Partial Penetration Nozzles ML21292A1782021-10-19019 October 2021 Information Request for a NRC Post-Approval Site Inspection for License Renewal 05000373/2022010 ML21256A1902021-09-10010 September 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21207A0072021-07-26026 July 2021 NRR E-mail Capture - La Salle Units 1 and 2 - Request for Additional Information (RAI) License Amendment Request to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, GNF CRDA Application Methodology(EPID-L-2021-LLA-0016) ML21190A0192021-07-0808 July 2021 NRR E-mail Capture - Exelon Fleet - Request for Additional Information Regarding Adoption of TSTF-582 and TSTF-583-T ML21187A2972021-07-0707 July 2021 Information Request for an NRC Triennial 10 CFR 50.59 (Evaluation of Changes, Tests, and Experiments) Baseline Inspection ML21144A2132021-05-24024 May 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding License Transfer Application ML21117A0342021-05-0505 May 2021 Request for Additional Information Regarding Proposed Alternative to Use ASME Code Case N-893 ML21119A2282021-04-29029 April 2021 NRR E-mail Capture - Request for Additional Information (RAI) - LaSalle, EPID-L-2020-LLA-0018, License Amendment Request (LAR) TSTF-505 ML21077A1902021-03-18018 March 2021 NRR E-mail Capture - Lasalle Units 1 and 2 - Request for Additional Information (RAI) Request for License Amendment Regarding Ultimate Heat Sink, (EPID-L-2020-LLA-0165) ML21068A2762021-03-0909 March 2021 NRR E-mail Capture - La Salle Units 1 and 2 - Request for Additional Information (RAI) Relief Request I4R-12 Relief from Code Surface Examinations for 2B33-F060B Valve Repair (EPID-L-2020-LLA-0016) ML21067A6752021-03-0808 March 2021 NRR E-mail Capture - La Salle Units 1 and 2 - Request for Additional Information (RAI) UHS Amendment Request (EPID-L-2020-LLA-0165) ML21060B4352021-03-0101 March 2021 NRR E-mail Capture - Second Round - Request for Additional Information (Rais) EPID-L-2020-LLA-0018, LaSalle License Amendment Request to Adopt Risk Informed Completion Times TSTF-505, Revision 2 ML21062A0652021-03-0101 March 2021 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Proposed Fleet Alternative to Documentation Requirements for Pressure Retaining Bolting ML21053A0252021-02-20020 February 2021 NRR E-mail Capture - Request for Additional Information (Rais) - LaSalle Request for Exemption from Pre-Access Drug and Alcohol Testing ML21049A2572021-02-18018 February 2021 Request for Additional Information Byron/Dresden Proposed Changes to Site Emergency Plans to Support Post-Shutdown and Permanently Defueled Conditions (EPID-2020-LLA-0240 & EPID-2020-LLA-0237) ML21048A0432021-02-16016 February 2021 County Station - Notification of NRC Design Bases Assurance Inspection (Programs) and Initial Request for Information - Inspection Report 05000373/2021011 and 05000374/2021011 ML20364A2452020-12-29029 December 2020 Notification of an NRC Triennial Heat Sink Performance Inspection and Request for Information; Inspection Report 05000373/2021002; 05000374/2021002 ML20346A1042020-12-11011 December 2020 NRR E-mail Capture - LaSalle County Station, Units 1 and 2 - Request for Additional Information Regarding the License Amendment Request to Adopt 10 CFR 50.69 ML20330A1892020-11-25025 November 2020 Request for Information for an NRC Post-Approval Site Inspection for License Renewal; Inspection Report 05000374/2021010 ML20321A0852020-11-16016 November 2020 Notification of NRC Baseline Inspection and Request for Information (05000374/2021001) ML20247J4082020-09-29029 September 2020 Apla Request for Additional Information LAR 50.69 and TSTF-505 (Epids L-2020-LLA-0017) and ML20253A3422020-09-17017 September 2020 Correction to Request for Additional Information Request to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems, and Components for Nuclear Power Reactors (EPID-2020-LLA-0017) ML20253A2272020-09-16016 September 2020 Correction to Request for Additional Information Application to Adopt Risk-Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b ML20240A2182020-09-0303 September 2020 Request for Additional Information Regarding Amendment Request for Amendments to Renewed Facility Operating Licenses to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems, and Co ML20239A7262020-08-27027 August 2020 Supplemental Information Needed for Acceptance of Requested Licensing Action Regarding Request for a License Amendment to Technical Specification 3.7.3, Ultimate Heat Sink ML20239A7982020-08-25025 August 2020 NRR E-mail Capture - Exelon Generation Company, LLC - Fleet License Amendment Request to Adopt TSTF-568, Revision 2 ML19275H1362019-10-0202 October 2019 NRR E-mail Capture - Exelon Generation Company, LLC - Request for Additional Information Regarding Request to Use ASME Code Case N-879 ML19179A0612019-07-19019 July 2019 Three Mile Point 1 - Supplemental Information Needed to Proposed Alternative to Use ASME Code Case N-879 ML19120A2302019-04-29029 April 2019 Ltr. 04/29/19 LaSalle County Station, Units 1 and 2 - Request for Information for an NRC Triennial Baseline Design Bases Assurance Inspection (Team); Inspection Report 05000373/2019012; 05000374/2019012 (DRS-M.Jones) ML19087A2682019-03-28028 March 2019 NRR E-mail Capture - Request for Additional Information (RAI) - LaSalle 1 and 2, EPID-L-2018-LLA-0162, LAR Removal of Operating Mode Restrictions for Performing Surveillance Testing of the Div 3 Battery and HPCS DG ML19065A0902019-03-0505 March 2019 NRR E-mail Capture - LaSalle 1 and 2, EPID-L-2018-LLR-0162, LAR Removal of Operating Mode Restrictions for Performing Surveillance Testing of the Div 3 Battery and HPCS DG, Additional Draft Request for Additional Information (RAI) ML19058A2392019-02-27027 February 2019 Information Request to Support Upcoming Problem Identification and Resolution Inspection at LaSalle County Station, Units 1 and 2 ML19036A6562019-02-0505 February 2019 NRR E-mail Capture - LaSalle 1 and 2, EPID-L-2018-LLR-0123, Relief Request I3R-15, Third Inservice Inspection Interval, Request for Additional Information (RAI) ML19022A2552019-01-22022 January 2019 NRR E-mail Capture - LaSalle Units 1 and 2, EPID-L-2018-LLA-0035, Amendment Request to Adopt TSTF-334-A, Status of Revised Draft RAIs Sent to You on December 13, 2018 ML19050A0042019-01-22022 January 2019 NRR E-mail Capture - LaSalle 1 and 2, EPID-L-2018-LLR-0162, LAR Removal of Operating Mode Restrictions for Performing Surveillance Testing of the Div 3 Battery and HPCS DG, Draft Request for Additional Information (RAI) ML19022A0292018-12-13013 December 2018 NRR E-mail Capture - Draft Request for Additional Information for LaSalle License Amendment Request to Adopt TSTF-334-A, Revision 2 2023-09-21
[Table view] |
Text
From: Vaidya, Bhalchandra Sent: Monday, July 26, 2021 7:14 AM To: Taken, Jason C.:(Exelon Nuclear); 'david.gullott@exeloncorp.com'
Subject:
LA SALLE UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION (RAI)
RE: License Amendment Request to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, "GNF CRDA Application Methodology"(EPID-L-2021-LLA-0016)
SUBJECT:
LASALLE UNITS 1 AND 2 -REQUEST FOR ADDITIONAL INFORMATION (RAI)
RE: License Amendment Request to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, "GNF CRDA Application Methodology" (EPID-L-2021-LLA-0016)
Jason and David, By letter to the U.S. Nuclear Regulatory Commission (NRC) dated February 10, 2021 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML21041A490), Exelon Generation Company, LLC (EGC, the licensee) submitted a request to amend Technical Specification (TS) Sections TS 3.1.3, "Control Rod Operability," TS 3.1.6, "Rod Pattern Control," and TS 3.3.2.1, "Control Rod Block Instrumentation," to allow for greater flexibility in rod control operations during various stages of reactor power operation at LaSalle County Station, Units 1 and 2 (LSCS). The proposed amendment will incorporate NRC approved methodology described in Licensing Topical Report, GNF CRDA Application Methodology, NEDE-33885P-A, Revision 1 (ADAMS Package Accession No. ML20091K212).
The U.S. Nuclear Regulatory Commission (NRC) staff currently reviewing your submittals and has identified areas where additional information is needed to complete its review. The Request for Additional Information (RAI) is provided below.
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REQUEST FOR ADDITIONAL INFORMATION OFFICE OF NUCLEAR REACTOR REGULATION Exelon Generation Co., LLC DOCKET NOS. 50-373, AND 50-374 EPID: L-2021-LLA-0016 RAI-SNSB-1:
By letter dated February 10, 2021 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML21041A490), the Exelon Generation Company, LLC, the licensee for LaSalle County Station, Units 1 and 2 (LSCS), submitted a request to amend the Technical Specifications (TSs), as necessary, to implement new control rod TS requirements associated with the NRC approved methodology described in Licensing Topical Report, GNF CRDA Application Methodology, NEDE-33885P-A, Revision 1 (ADAMS Package Accession No. ML20091K212).
Regulatory Requirement LSCS were designed to comply with the Nuclear Regulatory Commission (NRC), General Design Criteria (GDC) for Nuclear Power Plant Construction Permits. The regulatory
requirements and guidance documents that the NRC staff considered in its review of the proposed amendment included the following:
General Design Criterion 28, Reactivity limits. The reactivity control systems shall be designed with appropriate limits on the potential amount and rate of reactivity increase to assure that the effects of postulated reactivity accidents can neither (1) result in damage to the reactor coolant pressure boundary greater than limited local yielding nor (2) sufficiently disturb the core, its support structures or other reactor pressure vessel internals to impair significantly the capability to cool the core. These postulated reactivity accidents shall include consideration of rod ejection (unless prevented by positive means), rod dropout, steam line rupture, changes in reactor coolant temperature and pressure, and cold water addition.
The Issue of concern In the February 10, 2021, letter, the licensee mentions Appendix B, "Interim Acceptance Criteria and Guidance for the Reactivity Initiated Accidents," to Chapter 4.2, "Fuel System Design," of the Standard Review Plan (NUREG-0800, or SRP), as well as a proposed draft guide, DG-1327, "USNRC Draft Regulatory Guide DG-1327, Pressurized-Water Reactor Control Rod Ejection and Boiling-Water Reactor Control Drop Accidents." Both are referenced in NEDE-33885P-A, Revision 1. Since NEDE-33885P-A was issued, DG-1327 was revised and published as Regulatory Guide 1.236, Pressurized-Water Reactor Control Rod Ejection and Boiling-Water Reactor Control Drop Accidents, June 2020. While the form of the acceptance criteria for determining fuel rod failures in all three documents are consistent with what the NRC staff considered as part of their review of NEDE-33885P-A, the actual failure thresholds differ somewhat in each document. The licensee does not specify which acceptance criteria it plans it use to determine whether fuel rod failure occurs as part of their use of NEDE-33885P-A.
Request for Additional Information The licensee needs to explicitly clarify which acceptance criteria it plans to use in determining when fuel failure is expected to occur based on the results of the NEDE-33885P-A analyses, and as appropriate, justify the use of the specified acceptance criteria.
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A clarification telephone call was held between the NRC staff and licensee on July 23, 2021.
The licensee agreed during the clarification call to respond to the RAI no later than 30 days from the date of this communication.
If you have any questions, please contact me at (301) 415-3308, or by email at bhalchandra.vaidya@nrc.gov Bhalchandra K. Vaidya US Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Division of Operating Reactor Licensing LPL3 301-415-3308 Bhalchandra.vaidya@nrc.gov
Hearing Identifier: NRR_DRMA Email Number: 1289 Mail Envelope Properties (SJ0PR09MB6415DFF799F78158CF55F9E68DE89)
Subject:
LA SALLE UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION (RAI) RE: License Amendment Request to Incorporate Licensing Topical Report NEDE-33885P-A, Revision 1, "GNF CRDA Application Methodology"(EPID-L-2021-LLA-0016)
Sent Date: 7/26/2021 7:14:12 AM Received Date: 7/26/2021 7:14:00 AM From: Vaidya, Bhalchandra Created By: Bhalchandra.Vaidya@nrc.gov Recipients:
"Taken, Jason C.:(Exelon Nuclear)" <Jason.Taken@exeloncorp.com>
Tracking Status: None
"'david.gullott@exeloncorp.com'" <david.gullott@exeloncorp.com>
Tracking Status: None Post Office: SJ0PR09MB6415.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 5319 7/26/2021 7:14:00 AM Options Priority: Normal Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: