Letter Sequence Response to RAI |
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TAC:ME4679, Clarify Application of Setpoint Methodology for LSSS Functions (Open) |
Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance
- Supplement, Supplement
Administration
- Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance
- Meeting
Results
Other: GNRO-2012/00150, Final Report for Replacement Steam Dryer, GNRO-2017/00039, Steam Dryer Visual Inspection Results for the First Two Scheduled Refueling Outages, ML102660403, ML111720830, ML112560396, ML12167A257, ML12167A269, ML12177A287, ML13108A217, NRC-2012-0105, Environmental Assessment and Finding of No Significant Impact Related Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt
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MONTHYEARML1026604002010-08-20020 August 2010 GE-Hitachi Nuclear Energy Americas LLC - Affidavit of Edward Schrull Withholding from Public Disclosure Proprietary Report NEDC-33477P Project stage: Request ML1026603992010-08-31031 August 2010 NEDO-33477, Revision 0, Safety Analysis Report for Grand Gulf Nuclear Station Constant Pressure Power Uprate. Project stage: Request ML1026604032010-09-0808 September 2010 License Amendment Request Extended Power Uprate Project stage: Other GNRO-2010/00056, NEDO-33601, Revison 0, Engineering Report Grand Gulf Replacement Steam Dryer Fatigue Stress Analysis Using Pble Methodology. Appendix E Through Appendix G2010-09-30030 September 2010 NEDO-33601, Revison 0, Engineering Report Grand Gulf Replacement Steam Dryer Fatigue Stress Analysis Using Pble Methodology. Appendix E Through Appendix G Project stage: Request ML1026604062010-09-30030 September 2010 NEDO-33601, Revison 0, Engineering Report Grand Gulf Replacement Steam Dryer Fatigue Stress Analysis Using Pble Methodology. Appendix B Through Appendix D Project stage: Request ML1026604012010-09-30030 September 2010 NEDO-33601, Revison 0, Engineering Report Grand Gulf Replacement Steam Dryer Fatigue Stress Analysis Using Pble Methodology. Cover Through Appendix a Project stage: Request ML1030102002010-11-0909 November 2010 Supplemental Information Needed for Acceptance of License Amendment Request, Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Megawatts Thermal Project stage: Acceptance Review GNRO-2010/00071, Supplemental Information, License Amendment Request, Extended Power Uprate2010-11-18018 November 2010 Supplemental Information, License Amendment Request, Extended Power Uprate Project stage: Supplement GNRO-2010/00073, Supplemental Information License Amendment Request, Extended Power Uprate2010-11-23023 November 2010 Supplemental Information License Amendment Request, Extended Power Uprate Project stage: Supplement ML1034201082010-12-16016 December 2010 Request for Withholding Information from Public Disclosure, 9/7/10 Affidavit Executed by E. Schrull, GEH Re NEDC-33601P Project stage: Withholding Request Acceptance ML1034705862011-01-0505 January 2011 Request for Withholding Information from Public Disclosure, 11/19/10 Affidavit Executed by E. Schrull, GE-Hitachi, Regarding NEDC-33621P Project stage: Withholding Request Acceptance ML1102602812011-01-26026 January 2011 E-mail, Request for Additional Information Instrument and Controls, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI ML1102602872011-01-26026 January 2011 E-mail, Request for Additional Information Fire Protection, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI ML1102701872011-01-27027 January 2011 Request for Additional Information, Emcb Non-Steam Dryer Review, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI ML1103103902011-01-31031 January 2011 E-mail, Request for Additional Information, Vessels and Internal Integrity Review, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI ML1103901732011-02-0808 February 2011 Email, Request for Additional Information, Nrr/Dci/Csgb Review, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI GNRO-2011/00012, Request for Additional Information Regarding Extended Power Uprate2011-02-23023 February 2011 Request for Additional Information Regarding Extended Power Uprate Project stage: Request GNRO-2011/00011, Request for Additional Information Regarding Extended Power Uprate2011-02-23023 February 2011 Request for Additional Information Regarding Extended Power Uprate Project stage: Request ML1105407052011-02-23023 February 2011 E-mail, Request for Additional Information, Nrr/Dirs/Ihpb Review, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI ML1105407122011-02-23023 February 2011 E-mail, Request for Additional Information, Nrr/Dra/Apla Review, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI GNRO-2011/00013, Request for Additional Information Regarding Extended Power Uprate2011-02-23023 February 2011 Request for Additional Information Regarding Extended Power Uprate Project stage: Request ML1034200962011-02-25025 February 2011 Request for Withholding Information from Public Disclosure, 8/20/10 Affidavit Executed by E. Schrull, GEH, for NEDC-33477P Project stage: Withholding Request Acceptance ML1106007172011-03-0101 March 2011 Email Request for Additional Information, Round 2, Nrr/Dci/Cvib Review, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI GNRO-2011/00016, Request for Additional Information Regarding Extended Power Uprate2011-03-0909 March 2011 Request for Additional Information Regarding Extended Power Uprate Project stage: Request ML1107501322011-03-16016 March 2011 Email, Dose Assessment Branch, Request for Additional Information, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI ML1108202242011-03-23023 March 2011 Email, Request for Additional Information, Nrr/Dss/Srxb Review, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI ML1108202272011-03-23023 March 2011 Request for Additional Information, Nrr/Dss/Srxb Review, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI GNRO-2011/00018, Request for Additional Information Regarding Extended Power Uprate2011-03-30030 March 2011 Request for Additional Information Regarding Extended Power Uprate Project stage: Request GNRO-2011/00021, Response to Request for Additional Information Regarding Extended Power Uprate2011-03-31031 March 2011 Response to Request for Additional Information Regarding Extended Power Uprate Project stage: Response to RAI ML1109401362011-04-0404 April 2011 Email, Request for Additional Information, Nrr/Dci/Csgb Review, Round 2, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI ML1109502722011-04-0505 April 2011 Email, Request for Additional Information, Nrr/De/Eeeb Review, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI ML1109502812011-04-0505 April 2011 Request for Additional Information, Nrr/De/Eeeb Review, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI ML1110301112011-04-12012 April 2011 Email, Request for Additional Information, Nrr/Dss/Snpb Review, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI GNRO-2011/00024, Response to Request for Additional Information Regarding Extended Power Uprate2011-04-14014 April 2011 Response to Request for Additional Information Regarding Extended Power Uprate Project stage: Response to RAI ML11112A0982011-04-21021 April 2011 Request for Additional Information Regarding Extended Power Uprate Project stage: Request ML1110401002011-04-27027 April 2011 Request for Withholding Information from Public Disclosure, 3/28/2011 Affidavit Executed by E. Schrull, GEH, for Attachment 1 to GNRO-2011/00018 Project stage: Withholding Request Acceptance ML1110401252011-04-27027 April 2011 Request for Withholding Information from Public Disclosure, 2/20/2011 Affidavit Executed by E. Schrull, GEH, for Attachment 1 to GNRO-2011/00013 Project stage: Withholding Request Acceptance ML1110401132011-04-27027 April 2011 Request for Withholding Information from Public Disclosure, 2/20/2011 Affidavit Executed by E. Schrull, GEH, for Attachment 1 to GNRO-2011/00011 Project stage: Withholding Request Acceptance ML1110401072011-04-27027 April 2011 Request for Withholding Information from Public Disclosure, 2/17/2011 Affidavit Executed by E. Schrull, GEH, for Attachment 1 to GNRO-2011/00012 Project stage: Withholding Request Acceptance ML1110401162011-04-27027 April 2011 Request for Withholding Information from Public Disclosure, 3/30/2011 Affidavit Executed by E. Schrull, GEH, for Attachment 1 to GNRO-2011/00021 Project stage: Withholding Request Acceptance GNRO-2011/00035, Response to Request for Additional Information Regarding Extended Power Uprate2011-05-0505 May 2011 Response to Request for Additional Information Regarding Extended Power Uprate Project stage: Response to RAI ML1113001562011-05-10010 May 2011 Email, Request for Additional Information, Nrr/Dss/Scvb Review, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI GNRO-2011/00037, Request for Additional Information Regarding Extended Power Uprate2011-05-11011 May 2011 Request for Additional Information Regarding Extended Power Uprate Project stage: Request ML1114002992011-05-20020 May 2011 E-mail, Request for Additional Information, Nrr/Dci/Emcb Review, Round 2, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI ML1113905252011-05-31031 May 2011 Request for Withholding Information from Public Disclosure, 4/21/2011 Affidavit Executed by E. Schrull, GEH, for Attachment 1 to GNRO-2011/00025 Project stage: Withholding Request Acceptance ML1115204582011-06-0101 June 2011 Email, Request for Additional Information, Nrr/Dra/Aadb Review, Round 2, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI ML1115304392011-06-0606 June 2011 (Redacted) Request for Additional Information from Nrr/De/Emcb Steam Dryer, Round 2, Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt Project stage: RAI GNRO-2011/00043, Request for Additional Information Regarding Extended Power Uprate2011-06-0808 June 2011 Request for Additional Information Regarding Extended Power Uprate Project stage: Request GNRO-2011/00046, Response to Request for Additional Information Regarding Extended Power Uprate2011-06-15015 June 2011 Response to Request for Additional Information Regarding Extended Power Uprate Project stage: Response to RAI ML1117200422011-06-20020 June 2011 Licensee Response Regarding Request for Additional Information on Training for Prnms (TAC No. 4679) Project stage: Request 2011-03-30
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Category:Letter
MONTHYEARML24012A1422024-01-31031 January 2024 Exemption from Select Requirements of 10 CFR Part 73 (EPID L-2023-LLE-0051 (Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting)) IR 05000416/20230042024-01-25025 January 2024 Integrated Inspection Report 5000416/2023004 ML24018A0222024-01-18018 January 2024 Core Operating Limits Report (COLR) Cycle 24, Revision 2 IR 05000416/20243012024-01-16016 January 2024 NRC Initial Operator Licensing Examination Approval 05000416/2024301 ML24012A1962024-01-12012 January 2024 Response to 2nd Round Request for Additional Information Concerning Relief Request Number EN-RR-22-001 Proposed Alternative to Use ASME Code Case N-752, Risk-Informed Categorization and ML23349A1672023-12-21021 December 2023 Request for Withholding Information from Public Disclosure ML23348A3572023-12-14014 December 2023 Application to Revise Technical Specifications to Use Online Monitoring Methodology Slides and Affidavit for Pre-Submittal Meeting ML23348A3712023-12-14014 December 2023 Notification of an NRC Fire Protection Baseline Inspection (NRC Inspection Report (05000416/2024011) and Request for Information ML23340A2222023-12-13013 December 2023 Project Manager Assignment ML23352A0292023-12-13013 December 2023 Entergy - 2024 Nuclear Energy Liability Evidence of Financial Protection ML23340A1592023-12-13013 December 2023 Entergy Operations, Inc. - Entergy Fleet Project Manager Assignment ML23333A1362023-11-29029 November 2023 Supplement to Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation ML23325A1422023-11-21021 November 2023 Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation IR 05000416/20234032023-11-13013 November 2023 Security Baseline Inspection Report 05000416/2023403 Cover Letter ML23311A2082023-11-0909 November 2023 Reassignment of U.S. Nuclear Regulatory Commission Branch Chief in the Division of Operating Reactor Licensing for Plant Licensing Branch IV IR 05000416/20230032023-11-0808 November 2023 Integrated Inspection Report 05000416/2023003 ML23270B9932023-09-29029 September 2023 Request to Update ASME Boiler & Pressure Vessel Code Relief Request SE with NRC-Approved Revision of Bwrip Guidelines (GG-ISI-020 & RBS-ISI-019) (EPID L-2022-LLR-0090) - Non-Proprietary ML23270B1892023-09-27027 September 2023 Evacuation Time Estimate Study ML23269A1242023-09-27027 September 2023 Request for Withholding Information from Public Disclosure ML23240A3952023-08-28028 August 2023 Reply to a Notice of Violation; EA-23-019 IR 05000416/20230052023-08-21021 August 2023 Updated Inspection Plan for Grand Gulf Nuclear Station (Report 05000416/2023005) ML23226A1002023-08-18018 August 2023 Regulatory Audit in Support of License Amendment Requests to Adopt TSTF-505, Revision 2, and 10 CFR 50.69 IR 05000416/20230022023-08-0808 August 2023 Integrated Inspection Report 05000416/2023002 and Independent Spent Fuel Storage Installation Inspection Report 07200050/2023001 IR 05000416/20234042023-08-0707 August 2023 Material Control and Accounting Program Inspection Report 05000416/2023404 IR 05000416/20230912023-07-28028 July 2023 Final Significance Determination of a Green Finding and Notice of Violation; NRC Inspection Report 05000416/2023091 ML23208A2112023-07-27027 July 2023 Entergy Operations Inc., Application to Revise Technical Specifications to Adopt TSTF-205, Revision of Channel Calibration, Channel Functional Test, and Related Definitions ML23166B0712023-06-15015 June 2023 Reply to Notice of Violation EA-22-104 and EA-22-115 ML23166B0662023-06-15015 June 2023 Response to NRC Integrated Inspection Report 05000416/2023001 ML23159A2302023-06-0808 June 2023 Response to Request for Additional Information Concerning Request to Update ASME Code Relief Request Safety Evaluations with NRC-Approved Revision of BWRVIP Guidelines (GG-ISI-020, and RBS-ISI-019) GNRO-2023/00014, License Amendment Request to Revise Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b2023-06-0606 June 2023 License Amendment Request to Revise Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b GNRO-2023/00015, Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors2023-06-0606 June 2023 Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors ML23122A1632023-05-18018 May 2023 NRC Inspection Report 05000416/2023090 and Preliminary White Finding IR 05000416/20234022023-05-17017 May 2023 Security Baseline Inspection Report 05000416/2023402 ML23110A8002023-05-10010 May 2023 Notice of Violation; Integrated Inspection Report 05000416/2023001 and NRC Investigation Report 4-2022-004 ML23130A2732023-05-10010 May 2023 and Waterford 3 Steam Electric Station - Response to Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations IR 05000416/20230012023-05-10010 May 2023 Notice of Violation; Integrated Inspection Report 05000416/2023001 and NRC Investigation Report 4-2022-004 ML23117A2172023-05-0101 May 2023 Safety Evaluation for Quality Assurance Program Manual Reduction in Commitment ML23117A0422023-04-27027 April 2023 Annual Radioactive Effluent Release Report (ARERR) ML23111A2132023-04-21021 April 2023 Responses to RAI Concerning Relief Request Number EN-RR-22-001 Proposed Alternative to Use ASME Code Case N-752, Risk-Informed Categorization and Treatment for Repair/ Replacement Activities ML23110A1122023-04-20020 April 2023 Annual Report for Entergy Quality Assurance Program Manual Changes Under 10 CFR 50.54(a)(3), 10 CFR 71.106, and 10 CFR 72.140(d). Notification of Application of Approved Appendix B to 10 CFR 72 Subpart G ML23110A0552023-04-20020 April 2023 Annual Radiological Environmental Operating Report (AREOR) ML23103A1022023-04-13013 April 2023 Annual Report of Individual Monitoring - NRC Form 5 for 2022 Per 10 CFR 20.2206 ML23102A1482023-04-12012 April 2023 Notification of NRC Initial Operator Licensing Examination 05000416/2024301 ML23089A0602023-03-30030 March 2023 Entergy Operations, Inc. - Fleet Project Manager Assignment ML23088A3922023-03-29029 March 2023 Nuclear Onsite Property Damage Insurance (10 CFR 50.54(w)(3)) ML23079A2772023-03-21021 March 2023 U.S. Nuclear Regulatory Commission Presentation at the May 1, 2023, Port Gibson City Council Meeting ML23080A2882023-03-21021 March 2023 Decommissioning Funding Status Report Per 10 CFR 50.75(f)(1) Entergy Operations, Inc IR 05000416/20230112023-03-0808 March 2023 Design Basis Assurance Inspection Report 05000416/2023011 2024-01-31
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Text
GNRO-2011/00079 September 12, 2011
U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
SUBJECT:
Response to Request for Additional Information Regarding Extended Power Uprate Grand Gulf Nuclear Station, Unit 1 Docket No. 50-416
License No.
NPF-29
REFERENCES:
- 1. License Amendment Request, Extended Power Uprate, dated September 8, 2010 (GNRO-2010/00056, Accession Number ML102660403)
Dear Sir or Madam:
The Nuclear Regulatory Commission (NRC) reques ted additional information regarding certain aspects of the Grand Gulf Nuclear Station, Unit 1 (GGNS) Extended Power Uprate (EPU) License Amendment Request (LAR) (Reference 1). Attachment 1 provides responses to the additional information requested by the Electrical Engineering Branch.
No change is needed to the no significant hazards consideration included in the initial LAR (Reference 1) as a result of the additional information provided. There is one new commitment included in this letter; it is summarized in Attachment 2.
If you have any questions or require additional information, please contact Jerry Burford at
601-368-5755.
Entergy Operations, Inc. P. O. Box 756 Port Gibson, MS 39150 Michael A. Krupa Director, Extended Power Uprate Grand Gulf Nuclear Station Tel. (601) 437-6684 GNRO-2011/00079 Page 2 of 2 I declare under penalty of perjury that the foregoing is true and correct. Executed on September 12, 2011.
Sincerely,
MAK/FGB/dm
Attachments: 1. Response to Request for Additional Information, Electrical Engineering Branch
- 2. List of Regulatory Commitments
cc: Mr. Elmo E. Collins, Jr.
Regional Administrator, Region IV U. S. Nuclear Regulatory Commission 612 East Lamar Blvd., Suite 400 Arlington, TX 76011-4125 U. S. Nuclear Regulatory Commission ATTN: Mr. A. B. Wang, NRR/DORL (w/2) ATTN: ADDRESSEE ONLY ATTN: Courier Delivery Only Mail Stop OWFN/8 B1
11555 Rockville Pike
Rockville, MD 20852-2378 State Health Officer Mississippi Department of Health P. O. Box 1700 Jackson, MS 39215-1700
NRC Senior Resident Inspector Grand Gulf Nuclear Station Port Gibson, MS 39150
Attachment 1 GNRO-2011/00079 Grand Gulf Nuclear Station Extended Power Uprate Response to Request for Additional Information Electrical Engineering Branch to GNRO-2011/ 00079
Page 1 of 3 Response to Request for Additional Information Electrical Engineering Branch By letter dated September 8, 2010, Entergy Operations, Inc. (Entergy) submitted a license amendment request (LAR) for an Extended Power Uprate (EPU) for Grand Gulf Nuclear Station, Unit 1 (GGNS). Entergy also provided responses to Requests for Additional Information related to equipment qualification in a letter dated May 5, 2011 (NRC ADAMS Accession No.
ML111250552). The U.S. Nuclear Regulatory Commission (NRC) staff has determined that the
following additional information is needed for the NRC Electrical Engineering Branch staff to complete their review of the amendment. Entergy's response to each item is also provided
below. RAI # 1 Regarding Licensee response to RAI #2 - Temperature:
Figure 2.3-1 of Attachment 5 to the LAR shows that the EPU MSLB / HELB temperature profile changes during the first 200 seconds of the event, with the short term plateau rising to 304
°F for approximately 200 seconds. For any qualified equipment located in the affected areas that is required to function during this event, the lowest qualification test temperature for aging (with a duration greater than 200 seconds) is 318
°F. Explain how the 15
°F margin (of IEEE-323-1974) is being maintained.
Response The only change to the qualification profile for the Main Steam Line Break / High Energy Line Break (MSLB / HELB) for the EPU is the short term plateau temperature increasing from 298
°F to 304°F. There are no changes to the peak temperature due to EPU as identified in Attachment 5, Figure 2.3-1. The existing peak temperatures and the margin between the peak calculated temperatures and Qualification Test temperatures remain unchanged. There is one equipment type (see EQDP 4.9, Boston Insulated Wire) for which the maximum qualification temperature is 318
°F and for which the qualification temperature margin has decreased below the 15
°F suggested by IEEE-323-1974. However, the margin has been assured in an alternative fashion. The equipment qualification test assures adequate margin does exist by considering test duration at the peak temperature. The qualification of this equipment utilized a peak test temperature of 318
°F for a duration of at least 4500 seconds which envelops the short term plateau duration of approximately 200 seconds reflected in , Figure 2.3-1 for the EPU MSLB/HELB temperature profile. IEEE-323-1974 recognizes this approach (increasing the test duration) as a method of assuring adequate margin exists. to GNRO-2011/ 00079
Page 2 of 3 The GGNS Licensing basis includes both NUREG-0588 Category I and Category II components, as outlined in GGNS FSAR Section 3.11.2.5.1. For Category II components, the qualification methodology is based on IEEE-323-1971, which does not contain a suggested temperature margin. The equipment (i.e., EQDP 4.9) affected here is Category II.
RAI # 2 Regarding Licensee response to RAI #2 - Radiation environment inside/outside containment: Table 2-3 of the GGNS May 5, 2011 letter includes an entry for Rockbestos Firewall III Specialty Cable and cites Note 1, which says: Note 1: This cable is qualified using required insulation thickness for the TID it receives.
The required insulation thickness is 19.19 mils; the cable has 21 mils of insulation which is a 20% margin in insulation thickness. Identify which guidance the licensee is using for crediting insulation thickness for radiation
shielding. Response The guidance for beta reduction is delineated in NRC IE Bulletin No.79-01B, Enclosure 4, Section 4.1.2. It is used to address beta dose reduction for the subject cable which has 21 mils thickness of insulation. The cable's test dose envelops the normal and accident gamma doses and a portion of the beta dose. The remaining beta dose is attenuated by crediting 19.19 mils of insulation thickness.
This results in an effective remaining insulation thickness of 1.81 mils (i.e., 21 - 19.19); per equipment manufacturer testing, the required insulation thickness to perform its design function is approximately 1.5 mils. The effective remaining insulation thickness provides 20% margin in dielectric strength for the cable's service voltage (120V).
RAI # 3 Regarding Licensee response to RAI #2 - Replacement Equipment:
As indicated in Entergy's letter dated November 12, 2010 (GNRO-2010/00071, NRC ADAMS Accession Number ML103260003), these splices are to be replaced with qualified splices.
Confirm this is captured as a commitment and identify the type of splices to be used.
Response The Scotch tape splices identified in EPU LAR Attachment 5 Table 2.3-2 are to be replaced with Raychem splices (EQDP EQ 19.1) qualified for the EPU environment. These splices are located in the RHR rooms and are used at motor terminations for the jockey pumps and valve to GNRO-2011/ 00079
Page 3 of 3 actuators. The environmental conditions to which the replacement splice materials are qualified bound the requirements for EPU operation, as addressed in Entergy letter GNRO-2010/00071 dated November 18, 2010 (NRC ADAMS Accession No. ML103260003). Entergy has reviewed the EPU LAR and the commitment summary. An explicit commitment to perform the replacement of the Group III equipment was inadvertently omitted. The EPU LAR did include the following statement: Remaining life determinations will be made for all Group II items and any required modifications or replacement of equipment will also be completed prior to EPU implementation. It is our intent and we commit to replace Group III non-qualified electrical splices for the six components prior to EPU implementation.
RAI #4 In LAR Section 2.3.5, under Condensate Inventory for Decay Heat Removal, the licensee stated that "The SBO [station blackout] evaluation at EPU condition shows a need for an additional approximately 24.4%, over CLTP, of CST water for use for RCIC use to ensure that adequate water volume is available to remove decay heat, depressurize the reactor, and maintain reactor vessel level above the top of active fuel. This increases the total volume required to approximately 136,014 gallons, which is within the current CST inventory reserve of 143,000
gallons".
The staff has also noted that FSAR Section 9.2.6.3 (Page 9.2-25a) indicates that "For station blackout only 115,278 gallons is required to cope with a 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> SBO event."
The staff needs a clarification of how the volume of the CST water at EPU conditions has been determined as 136,014 gallons for SBO, as CST water with 24.4% increase at EPU conditions appears to be higher than 136,014 gallons, if the current required volume considered is 115,278 gallons as per FSAR Section 9.2.6.3.
Response SHEX evaluations were performed for both the current licensed thermal power (CLTP) and EPU cases. For the CLTP case, the required volume is 109,311 gallons. The required volume for the EPU case is 136,014 gallons, as stated in EPU LAR Attachment 5, Section 2.3.5. The 24.4% increase is relative to the CLTP calculated value (i.e., (136,014 - 109,311) / 109,311)). The value in the FSAR was based on a different methodology.
Attachment 2 GNRO-2011/00079 Grand Gulf Nuclear Station Extended Power Uprate List of Regulatory Commitments to GNRO-2011/ 00079
Page 1 of 1 List of Regulatory Commitments
The following table identifies those actions committed to by Entergy in this letter. Any other statements in this submittal are provided for information purposes and are not considered to be regulatory commitments.
TYPE (Check one)
SCHEDULED COMPLETION DATE (If Required)
COMMITMENT ONE-TIME ACTION CONTINUING COMPLIANCE
- 1. Group III non-qualified electrical splices for the six components will be replaced with qualified splices prior to EPU implementation. x