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TAC:ME3376, Relocate Surveillance Frequencies to Licensee Control - RITSTF Initiative 5B (Open) TAC:ME3377, Relocate Surveillance Frequencies to Licensee Control - RITSTF Initiative 5B (Open) |
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Category:Letter type:RS
MONTHYEARRS-23-121, Sixth Ten-Year Interval Inservice Testing Program2023-11-30030 November 2023
Sixth Ten-Year Interval Inservice Testing Program
RS-23-119, Supplemental Information Letter for Part 73 Exemption Request - Responses to Request for Confirmatory Information2023-11-10010 November 2023
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RS-23-102, Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2023-10-16016 October 2023
Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation
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Constellation Energy Generation, LLC, Advisement of Leadership Changes and Submittal of Updated Standard Practice Procedures Plans
RS-23-071, Application to Adopt TSTF-564, Safety Limit MCPR2023-08-30030 August 2023
Application to Adopt TSTF-564, Safety Limit MCPR
RS-23-080, Constellation Energy Generation, LLC, Application to Revise Technical Specifications to Adopt TSTF-264-A, Revision 0, 3.3.9 and 3.3.10 - Delete Flux Monitors Specific Overlap Requirement SRs2023-08-30030 August 2023
Constellation Energy Generation, LLC, Application to Revise Technical Specifications to Adopt TSTF-264-A, Revision 0, 3.3.9 and 3.3.10 - Delete Flux Monitors Specific Overlap Requirement SRs
RS-23-077, Response to NRC Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations2023-06-16016 June 2023
Response to NRC Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations
RS-23-078, Supplement to License Amendment Request to Revise Technical Specification 3.1.4, Control Rod Scram Times2023-06-16016 June 2023
Supplement to License Amendment Request to Revise Technical Specification 3.1.4, Control Rod Scram Times
RS-23-042, Application to Revise Technical Specifications to Adopt TSTF-580, Provide Exception from Entering Mode 4 with No Operable RHR Shutdown Cooling2023-05-25025 May 2023
Application to Revise Technical Specifications to Adopt TSTF-580, Provide Exception from Entering Mode 4 with No Operable RHR Shutdown Cooling
RS-23-070, Supplement to License Amendment Request Regarding Transition to GNF3 Fuel2023-05-16016 May 2023
Supplement to License Amendment Request Regarding Transition to GNF3 Fuel
RS-23-057, Supplement to License Amendment Request Regarding Transition to GNF3 Fuel2023-04-17017 April 2023
Supplement to License Amendment Request Regarding Transition to GNF3 Fuel
RS-23-049, Constellation Energy Generation, LLC, Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations2023-03-23023 March 2023
Constellation Energy Generation, LLC, Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations
RS-23-041, Response to Request for Additional Information for Alternative Request RV-23H2023-03-14014 March 2023
Response to Request for Additional Information for Alternative Request RV-23H
RS-23-045, Constellation Energy Generation, LLC Submittal of Fitness for Duty Performance Data Reports for 2022 Per 10 CFR 26.717(c) & 10 CFR 26.2032023-02-28028 February 2023
Constellation Energy Generation, LLC Submittal of Fitness for Duty Performance Data Reports for 2022 Per 10 CFR 26.717(c) & 10 CFR 26.203
RS-23-003, Constellation Energy Generation, LLC, Summary of Changes to Quality Assurance Topical Report, NO-AA-10, and Decommissioning Quality Assurance Program, NO-DC-102023-01-31031 January 2023
Constellation Energy Generation, LLC, Summary of Changes to Quality Assurance Topical Report, NO-AA-10, and Decommissioning Quality Assurance Program, NO-DC-10
RS-23-004, Response to Request for Additional Information Regarding Transition to GNF3 Fuel License Amendment Request2023-01-23023 January 2023
Response to Request for Additional Information Regarding Transition to GNF3 Fuel License Amendment Request
RS-22-126, Constellation Energy Generation, LLC - Request to Use Provisions of a Later Edition of the ASME Boiler and Pressure Vessel Code, Section XI2022-11-30030 November 2022
Constellation Energy Generation, LLC - Request to Use Provisions of a Later Edition of the ASME Boiler and Pressure Vessel Code, Section XI
RS-22-121, Notice of Intent to Pursue Subsequent License Renewal Applications2022-11-0909 November 2022
Notice of Intent to Pursue Subsequent License Renewal Applications
RS-22-117, Response to Request for Additional Information License Amendment Request Regarding New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies2022-11-0303 November 2022
Response to Request for Additional Information License Amendment Request Regarding New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies
RS-22-116, Submittal of Relief Requests Associated with the Sixth Inservice Testing Interval2022-11-0101 November 2022
Submittal of Relief Requests Associated with the Sixth Inservice Testing Interval
RS-22-115, Annual Report of Emergency Core Cooling System Evaluation Model Changes and Errors2022-10-19019 October 2022
Annual Report of Emergency Core Cooling System Evaluation Model Changes and Errors
RS-22-092, Nine and Quad Cities - Application to Revise Primary Containment Isolation Instrumentation Technical Specifications in Accordance with TSTF-306, Revision 2, Add Action to LCO 3.3.6.1 to Give Option to Isolate the Penetration2022-10-0303 October 2022
Nine and Quad Cities - Application to Revise Primary Containment Isolation Instrumentation Technical Specifications in Accordance with TSTF-306, Revision 2, Add Action to LCO 3.3.6.1 to Give Option to Isolate the Penetration
RS-22-066, License Amendment Request to Revise Technical Specification 3.1.4, Control Rod Scram Times2022-08-25025 August 2022
License Amendment Request to Revise Technical Specification 3.1.4, Control Rod Scram Times
RS-22-065, License Amendment Request Regarding Transition to GNF3 Fuel2022-08-18018 August 2022
License Amendment Request Regarding Transition to GNF3 Fuel
RS-22-093, Advisement of Leadership Changes for Constellation Energy Generation, LLC and Submittal of Updated Standard Practice Procedures Plans2022-08-18018 August 2022
Advisement of Leadership Changes for Constellation Energy Generation, LLC and Submittal of Updated Standard Practice Procedures Plans
RS-22-101, Response to Request for Additional Information Related to Relief Request I6R-01 Associated with the Sixth Inservice Inspection Interval2022-08-10010 August 2022
Response to Request for Additional Information Related to Relief Request I6R-01 Associated with the Sixth Inservice Inspection Interval
RS-22-099, Submittal of Upcoming Sixth Inservice Inspection Interval Relief Requests I6R-09 and I6R-102022-07-19019 July 2022
Submittal of Upcoming Sixth Inservice Inspection Interval Relief Requests I6R-09 and I6R-10
RS-22-082, Defueled Safety Analysis Report Update, Revision 112022-06-22022 June 2022
Defueled Safety Analysis Report Update, Revision 11
RS-22-080, Withdrawal and Proposed Alternative I6R-08 Associated with Code Case N-921 for Sixth Inservice Inspection Intervals2022-06-0909 June 2022
Withdrawal and Proposed Alternative I6R-08 Associated with Code Case N-921 for Sixth Inservice Inspection Intervals
RS-22-064, License Amendment Request Regarding New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies with Proposed Change to Technical Specifications Section 4.3.12022-06-0808 June 2022
License Amendment Request Regarding New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies with Proposed Change to Technical Specifications Section 4.3.1
RS-22-051, Constellation Energy Generation, LLC - Update to Correspondence Addressees and Service Lists2022-04-12012 April 2022
Constellation Energy Generation, LLC - Update to Correspondence Addressees and Service Lists
RS-22-049, Constellation Energy Generation, LLC, Supplemental Information to Correct Typographical Errors in Constellation'S Application to Revise Technical Specifications to Adopt TSTF-541 Revision 2, Add Exceptions to Surveillance Requirements for2022-04-0404 April 2022
Constellation Energy Generation, LLC, Supplemental Information to Correct Typographical Errors in Constellation'S Application to Revise Technical Specifications to Adopt TSTF-541 Revision 2, Add Exceptions to Surveillance Requirements for V
RS-22-046, Relief Requests Associated with the Sixth Inservice Inspection Interval2022-03-25025 March 2022
Relief Requests Associated with the Sixth Inservice Inspection Interval
RS-22-045, Constellation Energy Generation, LLC, Response to NRC Regulatory Issue Summary 2022-01, Preparation and Scheduling of Operator Licensing Examinations2022-03-25025 March 2022
Constellation Energy Generation, LLC, Response to NRC Regulatory Issue Summary 2022-01, Preparation and Scheduling of Operator Licensing Examinations
RS-22-042, Report on Status of Decommissioning Funding for Shutdown Reactors2022-03-23023 March 2022
Report on Status of Decommissioning Funding for Shutdown Reactors
RS-22-027, Constellation, Response to Request for Additional Information Regarding Application to Revise Technical Specifications to Adopt TSTF-541 Revision 2, Add Exceptions to Surveillance Requirements for Valves and Dampers Locked in the Actuated2022-02-23023 February 2022
Constellation, Response to Request for Additional Information Regarding Application to Revise Technical Specifications to Adopt TSTF-541 Revision 2, Add Exceptions to Surveillance Requirements for Valves and Dampers Locked in the Actuated P
RS-22-023, Constellation Energy Generation, LLC, Executed Trust Fund Agreement Amendment and Subordinate Trust Agreement2022-02-23023 February 2022
Constellation Energy Generation, LLC, Executed Trust Fund Agreement Amendment and Subordinate Trust Agreement
RS-22-019, Constellation Energy Generation, LLC - Update to Correspondence Addressees and Service Lists2022-02-16016 February 2022
Constellation Energy Generation, LLC - Update to Correspondence Addressees and Service Lists
RS-22-015, Notification of Completion of License Transfer and Request to Continue Processing Pending NRC Actions Previously Requested by Exelon Generation Company, LLC2022-02-0101 February 2022
Notification of Completion of License Transfer and Request to Continue Processing Pending NRC Actions Previously Requested by Exelon Generation Company, LLC
RS-21-009, Proposed Relief Request Associated with Code Case N-9212022-01-18018 January 2022
Proposed Relief Request Associated with Code Case N-921
RS-22-004, Supplement to Application to Adopt TSTF-554, Revision 1, Revise Reactor Coolant Leakage Requirements2022-01-0404 January 2022
Supplement to Application to Adopt TSTF-554, Revision 1, Revise Reactor Coolant Leakage Requirements
RS-21-121, Proposed Changes to Decommissioning Trust Agreements and Master Terms2021-12-15015 December 2021
Proposed Changes to Decommissioning Trust Agreements and Master Terms
RS-21-114, Request for Exemption from 10 CFR 2.109(b)2021-10-28028 October 2021
Request for Exemption from 10 CFR 2.109(b)
RS-21-110, Annual Report of Emergency Core Cooling System Evaluation Model Changes and Errors2021-10-19019 October 2021
Annual Report of Emergency Core Cooling System Evaluation Model Changes and Errors
RS-21-103, Updated Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations for Byron Station and Dresden Nuclear Power Station2021-09-28028 September 2021
Updated Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations for Byron Station and Dresden Nuclear Power Station
RS-21-097, Withdrawal of Certification of Permanent Cessation of Power Operations for Dresden Nuclear Power Station, Units 2 and 3, and Previously Submitted Licensing Actions in Support of Decommissioning2021-09-15015 September 2021
Withdrawal of Certification of Permanent Cessation of Power Operations for Dresden Nuclear Power Station, Units 2 and 3, and Previously Submitted Licensing Actions in Support of Decommissioning
RS-21-091, Implementation of Insider Threat Program Requirements Associated with the Voluntary Security Clearance Program and Advisement of Leadership Changes2021-09-13013 September 2021
Implementation of Insider Threat Program Requirements Associated with the Voluntary Security Clearance Program and Advisement of Leadership Changes
RS-21-086, Supplement to Request for Exemptions from Portions of 10 CFR 50.47 and 10 CFR 50, Appendix E2021-08-23023 August 2021
Supplement to Request for Exemptions from Portions of 10 CFR 50.47 and 10 CFR 50, Appendix E
RS-21-078, Response to Request for Additional Information for Application to Revise Technical Specification to Adopt TSTF-582, Reactor Pressure Vessel Water Inventory Control (RPV WIC) Enhancements, and TSTF-583-T, TSTF-582 Diesel2021-08-19019 August 2021
Response to Request for Additional Information for Application to Revise Technical Specification to Adopt TSTF-582, Reactor Pressure Vessel Water Inventory Control (RPV WIC) Enhancements, and TSTF-583-T, TSTF-582 Diesel
2023-08-30
[Table view] |
Text
ExeJon Generation Company, LLC 4300 Winfield Road www.exelonc:orp.com Nuclear Warrenville, IL 60555 10 CFR 50.90 RS-10-107 June 22, 2010 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001 Dresden Nuclear Power Station, Units 2 and 3 Renewed Facility Operating Ucense Nos. DPR-19 and DPR-25 NRC Docket Nos. 50-237 and 50-249
Subject:
Additional Information Supporting Application for Technical Specification Change Regarding Risk-Informed Justification for the Relocation of Specific Surveillance Frequency Requirements to a Licensee Controlled Program
Reference:
- 1. Letter from J. L. Hansen (Exelon Generation Company, LLC) to U. S.
NRC, "Application for Technical Specification Change Regarding Risk-Informed Justification for the Relocation of Specific Surveillance Frequency ReqUirements to a Licensee Controlled Program (Adoption of TSTF-425, Revision 3)" dated February 16, 2010
- 2. Letter from C. Gratton (U. S. NRC) to C. G. Pardee (Exelon Generation Company, LLC), "Dresden Nuclear Power Station, Units 2 and 3-Request for Additional Information Regarding an Amendment Request to Relocate Specific Surveillance Frequency Requirements to a Licensee-Controlled Program (TAC Nos. ME3376 thru ME33n)," dated May 17, 2010.
- 3. May 20, 2010 Teleconference between U. S. NRC (C. Gratton) and Exelon Generation Company, LLC (J. Schrage, et al)
In Reference 1, Exelon Generation Company, LLC (EGG) submitted a request to amend Appendix A, "Technical Specifications," (TS) of Renewed Facility Operating License Nos.
DPR-19, and DPR-25 Dresden Nuclear Power Station (DNPS), Units 2 and 3, respectively.
The proposed amendment revises the DNPS TS by relocating specific surveillance frequencies to a licensee-controlled program.
June 22, 2010 U. S. Nuclear Regulatory Commission Page 2 In Reference 2, the NRC forwarded a request for additional information concerning the Reference 1 license amendment request. In the Reference 3 teleconference, representatives from the NRC and EGC clarified the information that was requested by the NRC. The attachment to this letter provides the additional information requested by the NRC.
There are no regulatory commitments in this letter or the attachment.
Should you have any questions or require additional information, please contact Mr. John L.
Schrage at (630) 657-2821.
I declare under penalty of perjury that the foregoing is true and correct. Executed on the 22nd day of June 2010.
Jeff ey . ansen Manage - Licensing
Attachment:
Response to NRC Request for Additional Information, License Amendment Request to Relocate Specific Surveillance Frequency Requirements to a Licensee-Controlled Prog ram
ATTACHMENT Response to NRC Request for Additional Information License Amendment Request to Relocate Specific Surveillance Frequency Requirements to a Licensee-Controlled Program By letter dated February 16, 2010, Exelon Generation Company, LLC (EGC) submitted a request to amend Appendix A, "Technical Specifications," (TS) of Renewed Facility Operating License Nos. DPR-19, and DPR-25 Dresden Nuclear Power Station (DNPS), Units 2 and 3, respectively. The proposed amendment revises the DNPS TS by relocating specific surveillance frequencies to a licensee-controlled program.
The NRC forwarded a request for additional information concerning the proposed license amendment request by letter dated May 17, 2010. On May 20,2010, representatives from the NRC and EGC clarified the information that was requested by the NRC. The EGC response to the NRC request is provided below.
NRC Request for Additional Information "In Table 2-1 of Attachment 2 of the submittal, Gap #2 identified against supporting requirement DA-C8 states that plant-specific operational records were not used to quantify system or train standby times. The disposition of this item states that the existing model is "...judged to appropriately estimate the time that components were in standby..." There is no basis identified for how the licensee reached this jUdgment. State how standby times were estimated and why these estimates are jUdged to be appropriate for the calculation of standby failure rates instead of using plant-specific, operational data."
EGC Response For standby systems, nearly all of the demands are surveillance tests. As such, the system or train standby time estimates are based on the surveillance test interval for the system or train.
Basing the standby time on the interval between successive surveillance tests, using the established frequencies, is therefore consistent with actual demand experience.
However, this demand estimate does not account for operational demands or unplanned surveillances. The exclusion of these additional demands in the estimation of standby times is conservative in that the estimated standby time would be greater than or equal than actual.
This difference does not significantly impact the risk profile.
Additionally, NEI 04-10, Step 8, requires that an appropriate time-related failure contribution be utilized in the surveillance frequency change assessment, and Step 14, "Perform Sensitivity Studies," requires the performance of sensitivity studies regarding the choice of that value.
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