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Category:Request for Additional Information (RAI)
MONTHYEARML23284A3322023-10-11011 October 2023
Request for Additional Information Alternative Request (RA-22-0174) (L-2022-LLR-0060)
ML23178A0682023-07-0303 July 2023
Audit Plan Proposed Alternative to Use ASME Code Case N-752, Risk-Informed Categorization and Treatment for Repair/Replacement Activities in Class 2 & 3 Systems Section XI, Division 1
ML23156A2452023-06-0505 June 2023
Audit Summary and RAI-RCI - Revised Enclosure
ML23151A3482023-05-30030 May 2023
Duke Fleet - Request for Additional Information Proposed Alternative for Pressurizer Welds in Accordance with 10 CFR 50.55a(z)(1)
ML23142A2732023-05-22022 May 2023
Duke Fleet - Request for Additional Information Proposed Alternative for Steam Generator Welds in Accordance with 10 CFR 50.55a(z)(1)
ML23095A0052023-04-0404 April 2023
002 Radiation Safety Baseline Inspection Information Request
ML23086C0362023-03-27027 March 2023
Request for Additional Information Steam Generator Tube Inspection Report (03R31)
ML23039A1632023-02-0808 February 2023
Requalification Program Inspection
ML23038A1832023-02-0707 February 2023
Request for Additional Information Alternative Request (RA-22-0174) to Use ASME Code Case N-752
ML23037A0772023-02-0606 February 2023
402 Cyber Notification and RFI Letter Final
ML22251A2902022-09-0808 September 2022
Request for Additional Information Additional Mode Change Limitations Applicable to the Adoption of Technical Specifications Tasks Force Traveler (TSTF) No. 359, Revision 9
ML22234A0052022-08-30030 August 2022
SLRA - Feedback for RAI B2.1.7-4a to Duke - August 16, 2022
ML22157A0042022-06-0606 June 2022
10 CFR 50.59 Inspection Initial Information Request
ML22157A0012022-06-0101 June 2022
Email from NRC (Angela Wu) to Duke (Paul Guill) - Oconee SLRA - Additional NRC Comments on RAI 4.6.1-1a
ML22154A2122022-06-0101 June 2022
SLRA - 2nd Round RAI B2.1.7-4b
ML22124A1632022-05-0303 May 2022
(Public) Oconee SLRA - 2nd Round RAI B2.1.7-4a
ML22124A1612022-05-0303 May 2022
Email from Angela Wu (NRC) to Steve Snider (Duke) - Oconee SLRA - 2nd Round RAI B2.1.7-4a
ML22122A0182022-04-28028 April 2022
Attachment: Oconee SLRA - 2nd Round RAI B2.1.9-2a
ML22122A0192022-04-28028 April 2022
Email from Angela Wu (NRC) to Steve Snider (Duke) - Oconee SLRA - 2nd Round RAI B2.1.9-2a
ML22122A1312022-04-27027 April 2022
(Public) Oconee SLRA - 2nd Round RAIs - Trp 76 (Irradiation Structural) - FE 3.5.2.2.2.6 Redacted
ML22115A1412022-04-25025 April 2022
NRR E-mail Capture - Duke Common EOF Relocation - Request for Addition Information
ML22113A0092022-04-20020 April 2022
Attachment: Oconee SLRA - Final RAI 3.1.2-1
ML22112A0072022-04-20020 April 2022
Email from Marieliz Johnson (NRC) to Steve Snider (Duke) - Oconee SLRA - Request for Confirmation of Information 3.5.2.2.2.6-L
ML22081A0062022-03-21021 March 2022
Attachment: Oconee SLRA - 2nd Round RAI B4.1-3
ML22081A0052022-03-21021 March 2022
Email from Angela Wu (NRC) to Steve Snider (Duke) - Oconee SLRA - 2nd Round RAI B4.1-3
ML22080A0772022-03-16016 March 2022
SLRA - RAI Set 4 (2nd Round Rais)
ML22069A0012022-03-0808 March 2022
Attachment: Oconee SLRA - Final Requests for Confirmation of Information - Set 4
ML22063A4502022-03-0404 March 2022
Request for Additional Information Application to Revise TS 3.7.7, Low Pressure Service Water (LPSW) System, to Extend the Completion Time for One Required Inoperable LPSW Pump
RA-22-0036, Responses to NRC Request for Additional Information Set 22022-02-14014 February 2022
Responses to NRC Request for Additional Information Set 2
ML22019A1042022-01-18018 January 2022
Attachment: Oconee SLRA - Final Requests for Additional Information - Set 3
ML22019A2442022-01-18018 January 2022
Notification of an NRC Fire Protection Team Inspection (FPTI) (NRC Inspection Report 05000269/2022010, 05000270/2022010, 05000287/2022010) and Request for Information (RFI)
ML22019A1032022-01-18018 January 2022
Email from Angela Wu (NRC) to Steve Snider (Duke) - Oconee SLRA - Requests for Additional Information - Set 3
ML22012A0422022-01-11011 January 2022
SLRA - Final Requests for Additional Information - Set 2
ML22010A1132022-01-0505 January 2022
SLRA - RCIs - Set 3
ML21333A0392021-11-29029 November 2021
RP Inspection Document Request
ML21330A0192021-11-23023 November 2021
Attachment: Oconee SLRA - Final Requests for Confirmation of Information - Set 2
ML21327A2782021-11-23023 November 2021
Email from Angela Wu (NRC) to Steve Snider (Duke) - Oconee SLRA - Final RAIs (Set 1 and 2nd Round RAI B2.1.27-1a)
ML21327A2792021-11-23023 November 2021
SLRA - Final Requests for Additional Information - Set 1
ML21327A2802021-11-23023 November 2021
SLRA - Final 2nd Round RAI - RAI B2.1.27-1a
ML21313A2342021-11-0404 November 2021
Attachment: Oconee SLRA - Final Requests for Confirmation of Information - Set 1
ML21274A0682021-10-0101 October 2021
Request for Additional Information Alternative Request (RA-20-0334) Regarding Use of an Alternative to the ASME Code Case N-853 Acceptance Criteria
ML21273A0492021-09-30030 September 2021
Request for Additional Information Alternative Request (ON-RPI-OMN-28) to Use Code Case OMN-28
ML21271A5892021-09-28028 September 2021
SLRA - RAI B2.1.27-1 (Draft)
ML21271A5902021-09-28028 September 2021
SLRA - RAI B2.1.27-1 (Final)
ML21271A5882021-09-22022 September 2021
SLRA - Request for Additional Information B2.1.27-1 - Email from Angela Wu (NRC) to Steve Snider (Duke)
ML21217A1912021-08-0505 August 2021
Request for Additional Information Alternative Request (RA-20-0334) Regarding Use of an Alternative to the ASME Code Case N-853 Acceptance Criteria
ML21190A0172021-07-0808 July 2021
NRR E-mail Capture - Oconee Nuclear Station, Units 1, 2, and 3 - Request for Additional Information Alternative for ISI RPV Weld Examination from 10 to 20 Years (EPID-L-2021-LLR-0004)
ML21075A0032021-03-12012 March 2021
Emergency Preparedness Exercise Inspection Request for Information for - Brunswick, Catawba, North Anna, Oconee, Vogtle 1 & 2
ML21049A2632021-02-0404 February 2021
NRR E-mail Capture - Request for Additional Information - Duke Energy Fleet License Amendment Request to Revise Emergency Plan
ML20323A4072020-11-18018 November 2020
NRR E-mail Capture - Request for Additional Information - Brunswick License Exemption Request from 10CFR73 Annual Force on Force Exercise Requirements (EPIC L-2020-LLE-0180)
2023-07-03
[Table view] |
Text
OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 (ONS)
SUBSEQUENT LICENSE RENEWAL APPLICATION (SLRA)
REQUESTS FOR ADDITIONAL INFORMATION (RAIs)
SECOND ROUND RAI B4.1-3 SAFETY REVIEW RAI B4.1-3 Regulatory Basis:
Title 10 of the Code of Federal Regulations (CFR) Section 54.21(a)(3) requires an applicant to demonstrate that the effects of aging for each structure and component identified in 10 CFR 54.21(a)(1) will be adequately managed so that the intended function(s) will be maintained consistent with the current licensing basis for the period of extended operation. One of the findings that the U.S. Nuclear Regulatory Commission (NRC) staff must make to issue a renewed license (10 CFR 54.29(a)) is that actions have been identified and have been or will be taken with respect to managing the effects of aging during the period of extended operation on the functionality of structures and components that have been identified to require review under 10 CFR 54.21, such that there is reasonable assurance that the activities authorized by the renewed license will continue to be conducted in accordance with the current licensing basis. In order to complete its review and enable making a finding under 10 CFR 54.29(a), the staff requires additional information in regard to the matters described below.
Background:
In responses to RAIs B4.1-1 and B4.1-2, the applicant revised lift-off testing requirements in Section A5.1, Secondary Shield Wall Tendon Surveillance, in Appendix A of ONS SLRA as follows: Lift-off testing is performed on three tendons, one (1) horizontal, one (1) diagonal, and one (1) vertical, every other refueling outage. These three tendons, per unit, will be selected based on the existing lift-off data and practical access limitations. They will be the common tendons for lift-off testing. Prestressing forces will be trended and projected through the next two operating cycles, i.e. every 48 months. Visual inspections will also be performed on both ends of the common tendons on the same frequency as the lift-off tests.
Based on review of responses to RAIs B4.1-1 and B4.1-2, staff noted that the applicant will be revising the SLRA from lift-off testing on three randomly selected horizontal tendons, to lift-off testing of common tendons of one (1) horizontal, one (1) diagonal, and one (1) vertical, that included all three SSW tendon groups every other refueling outage.
SRP-SLR Section A.1.2.3.4, Detection of Aging Effects, notes that for a condition monitoring program, when sampling is used to represent a larger population of SCs, applicants provide the basis for the inspection population and sample size.
SRP-SLR Section A.1.2.3.5, Monitoring and Trending, notes that for sampling-based inspections, results are evaluated against acceptance criteria to confirm that the sampling bases (e.g., selection, size, frequency) will maintain the components intended functions throughout the subsequent period of extended operation based on the projected rate and extent of degradation.
1
During a March 7, 2022, public meeting, and subsequent email (ADAMS Accession No. ML22074A002), the applicant indicated that the Secondary Shield Wall (SSW) AMP would be revised to perform lift-off testing on the common three (3) horizontal tendons, one (1) diagonal tendon, and one (1) vertical tendon every other refueling outage for the collection of consistent data to trend prestressing tendon losses.
Issue:
Additional technical justification is needed for revising the SSW tendon lift-off testing requirements from three randomly selected horizontal tendons, to common tendons on three (3) horizontal, one (1) diagonal, and one (1) vertical.
Requests:
- 1. Confirm that the sample size (i.e., three (3) horizontal, one (1) diagonal, one (1) vertical) discussed in the email will be the sample size for the SSW AMP and provide a technical justification for the sample size.
- 2. Provide the technical justification(s) of revising the SSW tendon lift-off testing from randomly selected tendons to common tendons.
- 3. Provide markups to the SLRA, as appropriate.
2
