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MONTHYEARML21201A3122021-06-30030 June 2021 Updated Final Safety Analysis Report, Revision 21, and Operations Quality Assurance Program Description, Revision 2 Project stage: Request ML22014A4152022-01-14014 January 2022 Request for Exemption from Certain Requirements in 10 CFR 50.62(c)(1) Using Risk-Informed Process for Evaluations Project stage: Request ML22032A0312022-01-31031 January 2022 NRR E-mail Capture - Palo Verde 1, 2, and 3 - Acceptance Review for an Exemption Regarding Elimination of Dafas Using RIPE Process Project stage: Acceptance Review ML22035A3302022-02-10010 February 2022 Requests for Confirmation of Information for Exemption to Delete Diverse Auxiliary Feedwater Actuation System Based on Risk-Informed Process for Evaluations Project stage: Other ML22054A0052022-03-23023 March 2022 Exemption from the Requirements of 10 CFR 50.62 to Delete Diverse Auxiliary Feedwater Actuation System Using Risk-Informed Process for Evaluations (EPID L 2022 Lle 0004) Letter Project stage: Approval ML22054A0062022-03-23023 March 2022 Exemption from the Requirements of 10 CFR 50.62 to Delete Diverse Auxiliary Feedwater Actuation System Using Risk-Informed Process for Evaluations (EPID L 2022 Lle 0004) Exemption Project stage: Approval ML22054A0072022-03-24024 March 2022 Exemption from the Requirements of 10 CFR 50.62 to Delete Diverse Auxiliary Feedwater Actuation System Using Risk-Informed Process for Evaluations (EPID L 2022 Lle 0004) FRN Project stage: Approval 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 Project stage: Other ML23052A0772023-02-21021 February 2023 NRR E-mail Capture - Quad Cities Nuclear Power Station, Units 1 and 2 - Acceptance Timely Renewal Exemption Request Project stage: Other 2022-11-09
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Category:Exemption from NRC Requirements
MONTHYEARML23335A0782023-11-30030 November 2023 Independent Spent Fuel Storage Installation - Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation ML23166B0832023-07-0505 July 2023 Independence Spent Fuel Storage Installation - Issuance of Exemption ML23143A3912023-05-23023 May 2023 Independent Spent Fuel Storage Installation - Request for Exemption from NAC-MAGNASTOR Certificate of Compliance 72-1031 - Cask Lid Batch 3 Design Requirements ML22118B1622022-04-28028 April 2022 Request for Exemption from NAC-MAGNASTOR Certificate of Compliance 72-1031 - Cask Lid Design Requirements - Supplement ML22090A0982022-03-31031 March 2022 Independent Spent Fuel Storage Installation - Request for Exemption from NAC-MAGNASTOR Certificate of Compliance 72-1031 - Cask Lid Design Requirements ML22054A0062022-03-23023 March 2022 Exemption from the Requirements of 10 CFR 50.62 to Delete Diverse Auxiliary Feedwater Actuation System Using Risk-Informed Process for Evaluations (EPID L 2022 Lle 0004) Exemption ML22054A0052022-03-23023 March 2022 Exemption from the Requirements of 10 CFR 50.62 to Delete Diverse Auxiliary Feedwater Actuation System Using Risk-Informed Process for Evaluations (EPID L 2022 Lle 0004) Letter ML22034A9832022-02-15015 February 2022 FRN - Notice of Issuance of COVID-19 Exemptions Issued in January 2022 ML22035A3302022-02-10010 February 2022 Requests for Confirmation of Information for Exemption to Delete Diverse Auxiliary Feedwater Actuation System Based on Risk-Informed Process for Evaluations ML22003A1042022-01-26026 January 2022 the Independent Spent Fuel Storage Installation - Order Approving Indirect Transfer of Control of Licenses (EPID L 2021 LLM 0002) (FRN) ML22020A0402022-01-21021 January 2022 Exemption from Specific Requirements of 10 CFR Part 26 (EPID L 2022 Lle 0005 (Covid 19)) ML22020A0172022-01-19019 January 2022 Incoming Request from Palo Verde-Arizona Public Service Co. Re COVID-19 Related Request for Exemption from Part 26 Work Hours Requirements ML22014A4152022-01-14014 January 2022 Request for Exemption from Certain Requirements in 10 CFR 50.62(c)(1) Using Risk-Informed Process for Evaluations ML21243A5432021-09-0101 September 2021 Request for Partial Exemption from 10 CFR 50.62(c)(1) Risk-Informed Process for Evaluations (RIPE) ML20355A0002021-01-0505 January 2021 Exemption from Annual Force-on-Force Exercise Requirement of 10 CFR Part 73, Appendix B, General Criteria for Security Personnel, Subsection VI.C.3.(I)(1) (EPID L-2020-LLE-0XXX (COVID-19)) ML20357A0552020-12-23023 December 2020 Subsequent Request for Exemption from Select Requirements of 10 CFR Part 26 (EPID L-2020-LLE-0238 (COVID-19)) ML20335A0902020-12-21021 December 2020 Federal Register Notice - November 2020 COVID-19 Exemptions ML20356A2922020-12-21021 December 2020 Independent Spent Fuel Storage Installation (ISFSI) - Subsequent Request for Exemption from Specific Requirements of 10 CFR Part 26, Fitness for Duty Programs ML20353A3912020-12-18018 December 2020 Independent Spent Fuel Storage Installation (ISFSI) - Request for a Temporary Exemption from 10 CFR 73, Appendix B, Section VI, Subsection A.7 and Subsection C.3(l)(1) ML20303A0152020-11-0202 November 2020 Exemption from Select Requirements of 10 CFR Part 26 (EPID L-2020-LLE-0170 (COVID-19)) ML20302A4172020-10-28028 October 2020 Independent Spent Fuel Storage Installation, Request for Exemption from Specific Requirements of 10 CFR Part 26, Fitness for Duty Programs ML20119A5242020-05-0707 May 2020 FRN: Notice of Issuance of Multiple Exemptions Regarding 10 CFR Part 26 (COVID-19) ML20107F8352020-04-16016 April 2020 Exemption from Select Requirements of 10 CFR Part 26 (EPID L-2020-LLE-0024 (COVID-19)) ML19205A2732019-08-19019 August 2019 Environmental Assessment for the Exemption Request for Arizona Public Service Company'S Palo Verde Nuclear Generating Installation in Wintersburg, Arizona ML19186A4492019-07-0505 July 2019 Request for Exemption from NAC-MAGNASTOR Certificate of Compliance 72-1031 ML0931605962009-11-0202 November 2009 Request for Temporary Exemption from the Provisions of 10 CFR 50.46 and 10 CFR 50, Appendix K for Lead Fuel Assemblies ML0827300062008-10-14014 October 2008 Temporary Exemption from the Requirements of 10 CFR Part 50, Section 50.46 and Appendix K for Lead Fuel Assemblies ML0827300032008-10-14014 October 2008 Transmittal Letter, Temporary Exemption from the Requirements of 10 CFR Part 50, Section 50.46 and Appendix K for Lead Fuel Assemblies 2023-07-05
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARML24011A1002024-01-10010 January 2024 March 2024 Emergency Preparedness Program Inspection - Request for Information ML23334A1612023-11-30030 November 2023 NRR E-mail Capture - Palo Verde 1, 2, and 3 - RAIs Associated with License Renewal Commitment for Pressurizer Surge Line Welds Inspection Program to Manage Environmentally Assisted Fatigue ML23334A0072023-11-29029 November 2023 NRR E-mail Capture - Palo Verde 1, 2, and 3 - Official RAIs for LAR That Revises TSs 3.5.1, SITs - Operating; 3.5.2, SIT Shutdown; 3.6.5, Containment Air Temperature; and SRs for TS 3.5.1, SITs Operating ML23298A1232023-10-25025 October 2023 NRR E-mail Capture - Palo Verde, Unit 1 - RAIs for Relief Request 70, Proposed Alternatives for Pressurizer Lower Shell Temperature Nozzle ML23031A3392023-01-31031 January 2023 In-service Inspection Request for Information ML23013A0632023-01-13013 January 2023 NRR E-mail Capture - Palo Verde Unit 1 -Request for Additional Information - U1R23 Inspection Summary Report for Steam Generator Tubing ML22348A1672022-12-14014 December 2022 March 2023 Emergency Preparedness Exercise Inspection - Request for Information ML22339A2372022-12-0505 December 2022 NRR E-mail Capture - Palo Verde Unit 1 Request for Additional Information - U1R23 Inspection Summary Report for Steam Generator Tubing ML22272A3252022-09-29029 September 2022 Licensed Operator Positive Fitness-For-Duty Test Request for Additional Information ML22209A1752022-07-28028 July 2022 Inservice Inspection Request for Information ML22187A2632022-07-0606 July 2022 Notification of Inspection (NRC IR 05000528/2022004, 05000529/2022004 and 05000530/2022004) and Request for Information ML22067A2292022-03-0202 March 2022 Inservice Inspection Inspection PWR Request for Information ML22055A5842022-02-24024 February 2022 NRR E-mail Capture - Palo Verde, Unit 3 - Final RAIs for 22nd Refueling Outage (Spring 2021) Steam Generator Tube Inservice Inspection Report ML22035A3302022-02-10010 February 2022 Requests for Confirmation of Information for Exemption to Delete Diverse Auxiliary Feedwater Actuation System Based on Risk-Informed Process for Evaluations ML22025A4012022-01-0303 January 2022 March 2022 Emergency Preparedness Program Inspection - Request for Information ML21245A2222021-09-0101 September 2021 Request for Information ML21200A2392021-07-20020 July 2021 Docs Request AC - AA August 2021 ML21154A0082021-05-26026 May 2021 NRR E-mail Capture - Palo Verde 1, 2 and 3 - Official RAIs for LAR Associated with Permanent Extension of Containment ILRT Frequency to 15 Years (Type a) and CIV Leak Rate Test Frequency to 75 Months (Type C) ML21064A2372021-03-0303 March 2021 ISI Request for Information Rls ML21042B9692021-02-18018 February 2021 Notification of NRC Design Bases Assurance Inspection and Initial Request for Information ML21043A1462021-02-11011 February 2021 NRR E-mail Capture - Palo Verde 1, 2, and 3 - Official RAI for an Order Associated with Indirect License Transfer from Public Service Company of New Mexico to Avangrid, Inc ML21023A0212021-01-13013 January 2021 PVNGS PI&R Request for Information RA ML21011A1972021-01-12012 January 2021 Unit 2, and Unit 3 - Notification of an NRC Fire Protection Baseline Inspection (NRC Inspection Report 05000528/2021012, 05000529/2021012 and 05000530/2021012) and Request for Information ML20227A0992020-08-14014 August 2020 Licensed Operator Positive Fitness-For-Duty Test Request for Additional Information ML20118D1362020-04-28028 April 2020 Licensed Operator Positive Fitness-For-Duty Test Request for Additional Information ML20049A0992020-02-14014 February 2020 Notification of Cyber Security Inspection (NRC Inspection Report 05000528/2020401; 05000529/2020401; and 05000530/2020401) and Request for Information ML20049A0252020-02-12012 February 2020 NRR E-mail Capture - Palo Verde Nuclear Generating Station, Unit 1 - Official RAIs for License Amendment Request Associated with Changes to Emergency Plan Staffing Requirements ML20021A3172020-01-21021 January 2020 NRR E-mail Capture - Palo Verde Nuclear Generating Station, Unit 1 - Official RAIs for Relief Request 64, Impractical Examinations for the Third 10-Year ISI Interval ML19317D0782019-11-13013 November 2019 NRR E-mail Capture - Palo Verde 1 - Requests for Additional Information on Unit 1 21st Refueling Outage Steam Generator Tube Inspection Report ML19234A3202019-08-29029 August 2019 Redacted - Request for Additional Information for Amendment and Exemption Request to Support the Implementation of Framatome High Thermal Performance Fuel (EPID L-2018-LLA-0194; EPID L-2018-LLE-0010) ML19155A1842019-05-30030 May 2019 NRR E-mail Capture - Palo Verde Nuclear Generating Station, Unit 3 - Mvib Official RAIs for RR-63, Impractical Examinations for the Third 10-Year ISI Interval ML19095A6552019-04-0404 April 2019 NRR E-mail Capture - Palo Verde Nuclear Generating Station, Unit 3 - Mphb Official RAIs for RR-63, Impractical Examinations for the Third 10-Year ISI Interval ML19044A7342019-02-13013 February 2019 NRR E-mail Capture - Palo Verde1, 2, and 3 - Official Requests for Additional Information for RR 62, Third and Fourth 10-Year ISI Intervals, Proposed Alternative - Pressurizer Heat Sleeve Repairs ML19008A3612019-01-0808 January 2019 NRR E-mail Capture - Palo Verde 1, 2, and 3 - Official RAIs for LAR Associated with Response Time Testing of Pressure Transmitters ML18341A0252018-12-0303 December 2018 Notification of NRC Design Bases Assurance Inspection (Teams)(05000528/2019011, 05000529/2019011, and 05000530/2019011) and Initial Request for Information ML18271A0392018-10-0202 October 2018 Non Proprietary - Supplemental Information Needed for Acceptance of Requested License Amendments and Exemptions Implementation of Framatome High Thermal Performance Fuel (Epids L-2018-LLA-0194 and L-2018-LLE-0010) ML18221A5102018-08-23023 August 2018 Request for Additional Information License Amendment Request to Adopt Risk-Informed Completion Times (CAC Nos. MF6576, MF6577, and MF6578; EPID: L-2015-LLA-0001) ML18229A3132018-08-17017 August 2018 NRR E-mail Capture - Request for Additional Information Relief Request 58: Impractical Examinations for the Third 10-Year Inservice Inspection Interval Arizona Public Service Company Palo Verde Nuclear Generation Station, Unit 2 - Second Se ML18227A8672018-08-15015 August 2018 NRR E-mail Capture - Request for Additional Information Relief Request 58: Impractical Examinations for the Third 10-Year Inservice Inspection Interval Arizona Public Service Company Palo Verde Nuclear Generation Station, Unit 2 ML18124A0112018-05-0303 May 2018 NRR E-mail Capture - Palo Verde 1, 2, and 3 - Official Eeob RAIs for TSTF-505 (4b) LAR (CAC Nos. MF6576, MF6577, and MF6578; EPID L-2015-LLA-0001) ML18099A0072018-04-0606 April 2018 NRR E-mail Capture - Palo Verde 1, 2, and 3 - Official RAIs for 10 CFR 50.69 LAR (CAC Nos. MF9971, MF9972, and MF9973; EPID L-2017-LLA-0276) ML18094B1122018-04-0404 April 2018 NRR E-mail Capture - Palo Verde 1, 2, and 3 - Final RAIs for TSTF-505 (Initiative 4b) LAR (CAC Nos. MF6576, MF6577, and MF6578: EPID L-2015-LLA-0001) ML18066A7032018-03-0707 March 2018 Notification of Nrc Design Bases Assurance Inspection (Programs) 05000528/2018011, 05000529/2018011, and 05000530/2018011 Initial Request for Information ML17248A0162017-08-31031 August 2017 NRR E-mail Capture - Palo Verde 1, 2, and 3 - Final RAI for RRs PRR-03, PRR-04 and PRR-05, Pump Testing ML17107A0052017-04-14014 April 2017 NRR E-mail Capture - Palo Verde 1, 2, and 3 - Ngf LAR and Exemption RAIs (CAC Nos. MF8076 to MF8081) ML17082A4462017-03-28028 March 2017 PVNGS Units 1, 2, and 3 Transition to CE 16x16 Ngf - Draft RAIs Rev 3 ML17003A0182017-01-0202 January 2017 NRR E-mail Capture - Palo Verde, Unit 3 - Draft RAIs for the Second Emergency LAR Associated with EDG 3B Failure ML16258A0312016-09-14014 September 2016 PVNGS Units 1-3 - Notif of NRC Insp of the Implementation of Mitigation Strategies and Spent Fuel Pool Instr. Orders and Emer. Prep. Comm./Staffing/Multi-Unit Dose Assessment Plns(05000528/ 2016009;05000529/2016009;and 05000530/2016009) and ML16111B3312016-04-20020 April 2016 Notification of NRC Component Design Bases Inspection (05000528/2016007; 05000529/2016007; 05000530/2016007) and Initial Request for Information ML16083A2502016-03-23023 March 2016 NRR E-mail Capture - Palo Verde Nuclear Generating Station, Units 1, 2, and 3 - Official RAIs for EAL LAR 2024-01-10
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February 10, 2022 Mrs. Maria L. Lacal Executive Vice President/
Chief Nuclear Officer Mail Station 7605 Arizona Public Service Company P.O. Box 52034 Phoenix, AZ 85072-2034
SUBJECT:
PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2, AND 3 -
REQUESTS FOR CONFIRMATION OF INFORMATION FOR EXEMPTION TO DELETE DIVERSE AUXILIARY FEEDWATER ACTUATION SYSTEM BASED ON RISK-INFORMED PROCESS FOR EVALUATIONS (EPID L-2022-LLE-0004)
Dear Mrs. Lacal:
By letter dated January 14, 2022, Arizona Public Service Company (APS, the licensee) submitted an exemption to delete Diverse Auxiliary Feedwater Actuation System (DAFAS) using the Risk-Informed Process for Evaluations (RIPE) for Palo Verde Nuclear Generating Station, Units 1, 2. and 3 (Palo Verde). Specifically, the proposed change is a request from APS for an exemption under Title 10 of the Code of Federal Regulations (10 CFR) Section 50.12, Specific Exemptions, from certain requirements in 10 CFR 50.62, Requirements for reduction of risk from anticipated transients without scram (ATWS) events for light-water-cooled nuclear power plants, for Palo Verde.
The licensees request is for partial exemption from 10 CFR 50.62(c)(1). The portion of 10 CFR 50.62(c)(1) for which the exemption is requested is shown below in bold.
(c) Requirements. (1) Each pressurized water reactor must have equipment from sensor output to final actuation device, that is diverse from the reactor trip system, to automatically initiate the auxiliary (or emergency) feedwater system and initiate a turbine trip under conditions indicative of an ATWS. This equipment must be designed to perform its function in a reliable manner and be independent (from sensor output to the final actuation device) from the existing reactor trip system.
The requirements for Palo Verde is to provide a Diverse Scram System (DSS), DAFAS, and Diverse Turbine Trip (DTT). The exemption request will remove the requirement for the DAFAS from the Palo Verde licensing basis based on the RIPE. This exemption does not alter the requirements for the DSS or DTT at Palo Verde.
The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed your application for the subject exemption and accepted it on January 31, 2022. The NRC staffs further review concluded that additional requests for confirmation of information (RCIs) are required for complete evaluation.
M. Lacal Please note that we transmitted the draft RCIs on January 31, 2022, and at the licensees request, held a clarification call on February 10, 2022. Enclosed are the NRC staffs RCIs.
Please provide the responses within 2 weeks from the date of this letter, as mutually agreed during the clarification call. Your timely responses will allow the NRC staff to complete its review on schedule.
If you have any questions, please contact me at (301) 415-1564 or via e-mail at Siva.Lingam@nrc.gov.
Sincerely,
/RA/
Siva P. Lingam, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. STN 50-528, STN 50-529, and STN 50-530
Enclosure:
Requests for Confirmation of Information cc: Listserv
REQUESTS FOR CONFIRMATION OF INFORMATION REGARDING EXEMPTION TO DELETE DIVERSE AUXILIARY FEEDWATER ACTUATION SYSTEM USING THE RISK-INFORMED PROCESS FOR EVALUATIONS ARIZONA PUBLIC SERVICE COMPANY PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2, AND 3 DOCKET NOS. STN 50-528, STN 50-529, AND STN 50-530 By letter dated January 14, 2022 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML22014A415), Arizona Public Service Company (APS, the licensee) submitted an exemption to delete the Diverse Auxiliary Feedwater (AFW) Actuation System (DAFAS) using the Risk-Informed Process for Evaluations (RIPE) for Palo Verde Nuclear Generating Station, Units 1, 2. and 3 (Palo Verde, PVNGS). Specifically, the proposed change is a request from APS for an exemption under Title 10 of the Code of Federal Regulations (10 CFR) Section 50.12, Specific exemptions, from certain requirements in 10 CFR 50.62, Requirements for reduction of risk from anticipated transients without scram (ATWS) events for light-water-cooled nuclear power plants, for Palo Verde.
The licensees request is for a partial exemption from 10 CFR 50.62(c)(1). The portion of 10 CFR 50.62(c)(1) for which the exemption is requested is shown below in bold.
(c) Requirements. (1) Each pressurized water reactor must have equipment from sensor output to final actuation device, that is diverse from the reactor trip system, to automatically initiate the auxiliary (or emergency) feedwater system and initiate a turbine trip under conditions indicative of an ATWS. This equipment must be designed to perform its function in a reliable manner and be independent (from sensor output to the final actuation device) from the existing reactor trip system.
The requirements for Palo Verde is to provide a Diverse Scram System (DSS), DAFAS, and Diverse Turbine Trip (DTT). The exemption request will remove the requirement for the DAFAS from the Palo Verde licensing basis based on the RIPE. This exemption does not alter the requirements for the DSS or DTT at Palo Verde.
The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed your application for the subject exemption and accepted it on January 31, 2022 (ADAMS Accession No. ML22032A031). The NRC staffs further review concluded that the following additional requests for confirmation of information (RCIs) are required for complete evaluation.
RCI-1 Section 4.5, Manual Operator Actuation of Auxiliary Feedwater, of the Enclosure to the APS application dated January 14, 2022, states that core heat removal and reactor coolant system (RCS) heat removal are critical safety functions following the Palo Verde standard post trip actions. The RCS pressure analysis discussed in the exemption indicates that there would be no time limit for operator action. This information could be misleading.
Enclosure
The NRC staff noted that the Integrated Decisionmaking Panel (IDP) package describes a deterministic engineering evaluation (Engineering Work Order No. 21-03084-003). This evaluation provides insight into the beyond design basis case of a loss of normal feedwater flow accident, which occurs coincidently with a trip on supplementary protection system high-high pressurizer pressure, no auxiliary feedwater actuation signal (AFAS) -1, no AFAS-2, and no DAFAS. The results of the IDP analysis show that in the worst-case scenario, approximately 10 minutes are available for the operators to manually actuate auxiliary feedwater before a lack of adequate inventory occurs in the steam generator. Avoiding the lack of adequate inventory in the steam generator by taking this operator action can address the critical safety function of core and RCS heat removal.
Please provide a description of, or the information from, the analysis in Engineering Evaluation 21-03804-003, Deterministic Computer Code Runs to Support RIPE Process, which provides the justification and basis for the need to manually actuate AFW flow to preclude a lack of adequate inventory in the steam generator within 645 seconds as discussed in the IDP held on September 30, 2021, and observed by the NRC staff. This approximate 10-minute time requirement is alluded to in Enclosure Attachment 3 of the licensees application dated January 14, 2022.
RCI-2 In Section 2.2, Implementation of 10 CFR 50.62 Requirements at Palo Verde, and Section 4.4, PVNGS Design Features, of the Enclosure to the APS application dated January 14, 2022, the licensee describes the ATWS implementation and general design respectively of the reactor protection system (RPS) and engineered safety features actuation system (ESFAS) as if the systems are physically separate and independent instrumentation and controls systems.
However, the Palo Verde Updated Final Safety Analysis Report (UFSAR), Revision 21, Section 7.1.1.1, Protection System (ADAMS Accession No. ML21201A262), describes both of these systems as sections of the plant protection system (PPS) and in fact these two subsystems have common inputs as well as extensive physically shared cabinets, instrument racks, and drawers. Please verify whether RPS and ESFAS are physically separate systems or part of the same system. Also describe the physical separation of subcomponents between the PPS-RPS and the PPS-ESFAS.
RCI-3 Section 4.5 of the licensees application dated January 14, 2022, describes (on page 16)
N AFW Pump as Class 1E. However, the Palo Verde UFSAR, Revision 21, Section 10.4.9.2, System Description, describes this pump as neither Class 1E electrical nor seismically qualified. While manual operator actions can be taken to energize the pump motor from the A emergency diesel generator during a loss of power, the connecting circuitry is not Class 1E beyond the 4 kilovolts Class Bus NB01 connection, and the pump motor is normally aligned to a non-class electrical bus. Please provide clarification as to whether the N AFW Pump is Class 1E or Non-Class.
RCI-4 Please verify that the described manual operator actions are formally credited in the exemption license basis, as independent diverse means to actuate auxiliary feedwater upon RPS/AFAS failure, and not resulting in more than a minimum decrease in defense-in-depth and safety
margin with respect to the existing system and operations (Criterion 5 of Step 2 Screening Assessment of the Enclosure Attachment 1 to the APS application dated January 14, 2022).
ML22035A330 *by email OFFICE NRR/DORL/LPL4/PM* NRR/DORL/LPL4/LA* NRR/DRA/APOB/BC*
NAME SLingam PBlechman AZoulis DATE 2/10/2022 2/10/2022 2/10/2022 OFFICE NRR/DORL/LPL4/BC* NRR/DORL/LPL4/PM*
NAME JDixon-Herrity SLingam DATE 2/10/2022 2/10/2022