Letter Sequence Supplement |
|---|
|
|
|
|
|---|
Category:Letter type:RS
MONTHYEARRS-23-120, Supplemental Information Letter for Part 73 Exemption Request - Responses to Request for Confirmatory Information2023-11-10010 November 2023
Supplemental Information Letter for Part 73 Exemption Request - Responses to Request for Confirmatory Information
RS-23-103, Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2023-10-13013 October 2023
Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation
RS-23-097, Constellation Energy Generation, LLC, Advisement of Leadership Changes and Submittal of Updated Standard Practice Procedures Plans2023-10-12012 October 2023
Constellation Energy Generation, LLC, Advisement of Leadership Changes and Submittal of Updated Standard Practice Procedures Plans
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-23-087, Revision to Approved Alternatives Associated with the Use of the BWRVIP Guidelines in Lieu of Specific ASME Code Requirements on Reactor2023-08-0404 August 2023
Revision to Approved Alternatives Associated with the Use of the BWRVIP Guidelines in Lieu of Specific ASME Code Requirements on Reactor
RS-23-084, Response to Request for Additional Information Regarding the Application to Revise Design Basis to Allow Use of Plastic Section Properties in Lower Downcomer Braces Analysis2023-07-24024 July 2023
Response to Request for Additional Information Regarding the Application to Revise Design Basis to Allow Use of Plastic Section Properties in Lower Downcomer Braces Analysis
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-23-042, 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-23-049, 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-23-048, Exigent Amendment Request to Revise Design Basis Related to Seismic Requirements2023-03-0707 March 2023
Exigent Amendment Request to Revise Design Basis Related to Seismic Requirements
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-23-037, Annual 10 CFR 50.46 Report of Emergency Core Cooling System Evaluation Model Changes and Errors for LaSalle County Station2023-02-22022 February 2023
Annual 10 CFR 50.46 Report of Emergency Core Cooling System Evaluation Model Changes and Errors for LaSalle County Station
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-22-085, Application to Revise Design Basis to Allow Use of Plastic Section Properties in Lower Downcomer Braces Analysis2023-01-12012 January 2023
Application to Revise Design Basis to Allow Use of Plastic Section Properties in Lower Downcomer Braces Analysis
RS-23-006, Supplemental Information Regarding License Amendment Request Relocation of Pressure and Temperature Limit Curves to the Pressure and Temperature Limits Report2023-01-10010 January 2023
Supplemental Information Regarding License Amendment Request Relocation of Pressure and Temperature Limit Curves to the Pressure and Temperature Limits Report
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-22-109, Response to Request for Additional Information License Amendments Related to Fuel Storage2022-10-12012 October 2022
Response to Request for Additional Information License Amendments Related to Fuel Storage
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-22-093, 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-22-083, Response to Request for Additional Information Related to the License Amendment Request to Change New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies, with Proposed Changes to Technical2022-06-17017 June 2022
Response to Request for Additional Information Related to the License Amendment Request to Change New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies, with Proposed Changes to Technical
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-22-045, 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-22-035, Supplemental Information Regarding Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs2022-03-0404 March 2022
Supplemental Information Regarding Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs
RS-22-033, Response to Request for Additional Information Regarding Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs2022-03-0303 March 2022
Response to Request for Additional Information Regarding Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs
RS-22-032, Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs2022-03-0202 March 2022
Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs
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-22-027, 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-22-018, Annual 10 CFR 50.46 Report of Emergency Core Cooling System Evaluation Model Changes and Errors for LaSalle County Station2022-02-22022 February 2022
Annual 10 CFR 50.46 Report of Emergency Core Cooling System Evaluation Model Changes and Errors for LaSalle County Station
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-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-21-115, Supplemental Information for License Amendment Request Regarding New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies, with Proposed Changes to Technical Specifications 4.3.1 and 5.6.52021-11-0404 November 2021
Supplemental Information for License Amendment Request Regarding New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies, with Proposed Changes to Technical Specifications 4.3.1 and 5.6.5
RS-21-109, Request to Withhold Meeting Materials for the Non-Public Meeting Held on September 2, 20212021-10-14014 October 2021
Request to Withhold Meeting Materials for the Non-Public Meeting Held on September 2, 2021
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-21-078, 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
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)
RS-21-063, Application to Adopt TSTF-554, Revision 1, Revise Reactor Coolant Leakage Requirements2021-06-30030 June 2021
Application to Adopt TSTF-554, Revision 1, Revise Reactor Coolant Leakage Requirements
RS-21-064, License Amendment Request Re New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies - Cover Letter2021-06-30030 June 2021
License Amendment Request Re New Fuel Storage Vault and Spent Fuel Storage Pool Criticality Methodologies - Cover Letter
RS-21-070, Proposed Alternative to Utilize Code Case N-8932021-06-30030 June 2021
Proposed Alternative to Utilize Code Case N-893
RS-21-055, Response to Third Round Request for Additional Information (Rals) for LaSalle License Amendment Request to Adopt Risk Informed Completion Times TSTF- 505, Revision 2, Provide Risk-Informed Extended.2021-05-10010 May 2021
Response to Third Round Request for Additional Information (Rals) for LaSalle License Amendment Request to Adopt Risk Informed Completion Times TSTF- 505, Revision 2, Provide Risk-Informed Extended.
RS-21-054, Response to NRC Regulatory Issue Summary 2021-01, Preparation and Scheduling of Operator Licensing Examinations2021-04-29029 April 2021
Response to NRC Regulatory Issue Summary 2021-01, Preparation and Scheduling of Operator Licensing Examinations
RS-21-050, Response to Request for Additional Information (RAI) Regarding Request for License Amendment Regarding Ultimate Heat Sink (EPID-L-2020-LLA-0165)2021-04-16016 April 2021
Response to Request for Additional Information (RAI) Regarding Request for License Amendment Regarding Ultimate Heat Sink (EPID-L-2020-LLA-0165)
RS-21-045, Response to Request for Additional Information (RAI) Regarding Request for License Amendment Regarding Ultimate Heat Sink (EPID-L-2020-LLA-0165)2021-04-0707 April 2021
Response to Request for Additional Information (RAI) Regarding Request for License Amendment Regarding Ultimate Heat Sink (EPID-L-2020-LLA-0165)
RS-21-040, Response to Second Round Request for Additional Information (Rais) for License Amendment Request to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b2021-03-31031 March 2021
Response to Second Round Request for Additional Information (Rais) for License Amendment Request to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b
RS-21-043, Supplemental Information Regarding Relief Request I4R-12 Relief from Code Examinations for 2B33-F060A and 2B33-F060B Repairs, Revision 22021-03-26026 March 2021
Supplemental Information Regarding Relief Request I4R-12 Relief from Code Examinations for 2B33-F060A and 2B33-F060B Repairs, Revision 2
RS-21-042, Relief Request I4R-12 Relief from Code Examinations for 2B33-F060A and 2B33-F060B Repairs, Revision 22021-03-26026 March 2021
Relief Request I4R-12 Relief from Code Examinations for 2B33-F060A and 2B33-F060B Repairs, Revision 2
RS-21-039, Supplemental Information Regarding Application for Order Approving Transfers and Proposed Conforming License Amendments2021-03-25025 March 2021
Supplemental Information Regarding Application for Order Approving Transfers and Proposed Conforming License Amendments
RS-21-035, Relief Request I4R-12 Relief from Code Examinations for 2B33-F060A and 2B33-F060B Repairs2021-03-0909 March 2021
Relief Request I4R-12 Relief from Code Examinations for 2B33-F060A and 2B33-F060B Repairs
2023-08-04
[Table view] |
Text
Exelon Generation www,exeloncorp.com 4300 Winfield Road Warrenville, IL 60555 RS-04-131 September 2, 2004 U . S . Nuclear Regulatory Commission ATTN : Document Control Desk Washington, DC 20555-0001 LaSalle County Station, Units 1 and 2 Facility Operating License Nos. NPF-11 and NPF-18 NRC Docket Nos. 50-373 and 50-374 Subject : Supplemental Information Supporting the Request for Technical Specification Changes to Eliminate Selected Response Time Testing Requirements References : Letter from K. A. Ainger (Exelon Generation Company, LLC) to U. S . NRC, "Request for Technical Specification Changes to Eliminate Selected Response Time Testing Requirements," dated March 12, 2004 (2) Letter from K. A. Ainger (Exelon Generation Company, LLC) to U . S. NRC, "Additional Information Supporting the Request for Technical Specification Changes to Eliminate Selected Response Time Testing Requirements,"
dated June 16, 2004 In Reference 1, Exelon Generation Company, LLC (EGC) submitted a request for change to Appendix A, Technical Specifications (TS), of Facility Operating License Nos . NPF-11 and NPF-18 for LaSalle County Station . Specifically, the proposed changes would modify the TS to eliminate selected response time testing (RTT) requirements associated with Reactor Protection System instrumentation and Primary Containment Isolation instrumentation for Main Steam Line Isolation functions . The proposed changes are consistent with the approved BWR Owners' Group Licensing Topical Report .
The NRC subsequently provided a request for additional information in support of their review of the Reference 1 amendment request. EGC provided the requested information in Reference 2.
In a conference call between EGC and the NRC on June 21, 2004, the NRC requested additional information be provided to supplement the responses provided in Reference 2 . The attachment to this letter provides the requested information .
September 2, 2004 U. S . Nuclear regulatory Commission Page 2 Should you have any questions related to this information, please contact Mr. Timothy A.
Byarn at (630) 657-2804 .
I declare under penalty of perjury that the foregoing is true and correct. Executed on the 2nd day of September 2004 .
Respectfully, Patrick R. Simpson Manager - Licensing Exelon Generation Company, LLC Attachment : Supplemental Information Supporting the Request for Technical Specification Changes to Eliminate Selected Response Time Testing Requirements
ATTACHMENT Supplemental Information Supporting the Request for Technical Specification Changes to Eliminate Selected Response Time Testing Requirements Question 1 In Reference 1 to this attachment, the response to Question 1 did not provide the range code for each sensor type evaluated A Reference 2 to this attachment . Provide the range code for each sensor type evaluated .
Response 1 There were two sensor types evaluated as pat of the subject amendment request. The SOR 9N6-B45-NX-ClA-JJTTX6 sensor does not have a range code . The other sensor type, Rosemount 1153DB Series, has a range code of 5 .
Question 2 In Reference 1 to this attachment, Question 2 requested an explanation of how the bounding response time was determined for the recorded historical test data for each loop type . Question 3 requested the historical test data for each sensor in each loop type be provided . The NRC stated that the basis for the maximum bounding response time was provided in Reference 1 to this attachment however, the actual bounding response time was not provided . The NRC indicated that the amendment request assumes a representative response time but did not do a statistical analysis of the data.
The NRC requested that Exelon Generation Company, LLC (EGC) provide the historical test data and statistical analysis of the data for each loop type evaluated .
Response 2 EGC has collected and evaluated the available historical response time testing data for the sensor types used for the three loops evaluated in Reference 2 to this attachment .
The historical data was used to compute an average response time value and a standard deviation of that data for the B21-N015 and B21-N023 Series (i.e., SOR Model 9N6-B45-NX-ClA-JJTTX6) differential pressure switches and the B21-N402 Series (i .e .,
Rosemont 1153 Series Model 11 53DB5PB) differential pressure transmitters . Once the average and standard deviation values were computed for each sensor type, then a bounding response time value was computed . The bounding response time was calculated by adding the average response time to an amount of variation that would provide a 95% probability with a 95% confidence (i .e ., 95/95 value) that future response time data would be less than or equal to this bounding response time. To calculate the bounding response time value, the 9555 value 90M Table 18 .4 of Reference 3 to this attachment was used . The sensor with the fewest number of historical data points (i.e.,
fourteen data points) was the B21-N023 series of data. From the Reference 3 table, the 9195 value was 3 .01 standard deviations.
When the bounding response time value was computed it was compared to the maximum response time value allowed in the instrument loop's respective Reference evaluation in Reference 4 to this attachment . In all cases, the bounding response time
ATTACHMENT Supplemental Information Supporting the Request for Technical Specification Changes to Eliminate Selected Response Time Testing Requirements value for the 95/95 condition was less than the previously evaluated value provided in Reference 2 to this attachment.
This evaluation has confirmed that the statistically averaged response time for the instrument sensors in each loop evaluated, is less than the maximum acceptable value defined in the BWR Owners' Group Licensing Topical Report (Reference 4 to this attachment) . The results of the evaluation, including the historical data used to determine the average response time and standard deviation for each loop type sensor, are provided in the attached tables . This evaluation supports the conclusions of Reference 2 to this attachment that the response time testing for the specified instrument loops can be eliminated in accordance with the guidance in Reference 4 to this attachment.
References
- 1. Letter from K. A. Ainger (Exelon Generation Company, LLC) to the U. S . NRC, "Additional Information Supporting the request for Technical Specification Changes to Eliminate Selected Response Time Testing Requirements," dated June 16, 2004
- 2. Letter from K. A. Ainger (Exelon Generation Company, LLC) to the U . S . NRC, "Request for Technical Specification Changes to Eliminate Selected Response Time Testing Requirements," dated March 12, 2004
- 3. EPRI Report TR-103335, "Guidelines for Instrument Calibration Extension/Reduction Statistical Analysis of Instrument Calibration Data,"
Revision 1, dated October 1998
- 4. BWR Owners' group Licensing Topical Report, "System Analyses for the Elimination of Selected Response Time Testing Requirements," NEDO-32291-A, dated October 1995
ATTACHMENT Supplemental Information Supporting the Request for Technical Specification Changes to Eliminate Selected Response Time Testing Requirements TABLE 1 Historical Data Evaluation for Loop Type E Differential Pressure Transmitters Rosemount Model 1153DB5PB 1 B21- 11321- 1 B21- 11321- 21321- 21321- 1-
[Date N402B N402D N402A N402B N402C N402D (msec) (msec) (msec) (msec) (msec) msec 05/27/1988 011OM991 04M6/1991 OV25/1992 --
10/27/1992 O 1 M8/1993 0911/1993 03/03/ 1995 02/09/ 1996 100 110 Average Maximum Response Bounding 109.72 756 Time Response Time
_Qrsec) ..... ... (msec)
Standard Bounding Deviation 62 .78 Response Time 298.70 (msec)
ATTACHMENT Supplemental Information Supporting the Request for Technical Specification Changes to Eliminate Selected Response Time Testing Requirements TABLE 2 Historical Data Evaluation for Loop Type K Differential Pressure Switches SOR Model 9N6-B45-NX-ClA-JJTTX6 11321- B21- 1B21- B21- 213211 - 21321 -
Date N023AA N023BA N023C [N023D 1 N023AA N023BA N023C N023D (msec) (msec) (m msec) sec) (msec) (msec) msec msec 04/01/1991 1 1 0216/1992 11 /13/1992 ON21/1995 0309/1995 --
10/29/1996 Average Maximum Response Bounding 13&57 465 Time Response Time (msec) (msec)
Standard Bounding Deviation 96.87 Response Time 430 .14 (msec)
ATTACHMENT Supplemental Information Supporting the Request for Technical Specification Changes to Eliminate Selected Response Time Testing Requirements TABLE 3 Historical Data Evaluation for Loop Type J Differential Pressure Switches SOR Model 9N6-B45-NX-C1 A-JJTTX6 11321- 1 B21- 1 B21- 2B21- 21321- 21321- 2B21-Date N015A N015B N015C N015D N015A N015B N015C N015D (msec) (msec) (msec) msec) (mse msec msec )L L (msec) 1022/1988 0017/1990 02/19/1991 220 200 01/06/1 992 1120 560 1 V26M 992 435 240 0217M 995 --
03/15/1995 --
02/13/1996 295 680 10/04/1996 Average Maximum Response Bounding 558 .68 1880 Time Response Time Qnsec) Qnsec)
Bounding Standard 414.13 Response Time 1805 .22 Deviation Arnsec)
