Letter Sequence RAI |
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TAC:ME9764, Clarify Application of Setpoint Methodology for LSSS Functions (Approved, Closed) |
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MONTHYEARGNRO-2012/00096, License Amendment Request for Implementing a 24-Month Fuel Cycle, Grand Gulf Nuclear Station, Unit 12012-10-0202 October 2012
License Amendment Request for Implementing a 24-Month Fuel Cycle, Grand Gulf Nuclear Station, Unit 1
Project stage: Request
ML12289A1582012-10-15015 October 2012
Acceptance Review Email, License Amendment Request to Revise Technical Specifications and Surveillance Requirements to Support Operation with a 24-Month Fuel Cycle in Accordance with Generic Letter 91-04
Project stage: Acceptance Review
ML13077A3662013-03-18018 March 2013
Email, Request for Additional Information, License Amendment Request to Revise Technical Specifications and Surveillance Requirements to Support Operation with a 24-Month Fuel Cycle in Accordance with Generic Letter 91-04
Project stage: RAI
GNRO-2013/00023, Supplement to the License Amendment Request for Implementing a 24-Month Fuel Cycle2013-04-26026 April 2013
Supplement to the License Amendment Request for Implementing a 24-Month Fuel Cycle
Project stage: Supplement
ML13121A3912013-05-0101 May 2013
Email, Request for Additional Information, Round 2, Request to Revise Technical Specifications and Surveillance Requirements to Support Operation with a 24-Month Fuel Cycle in Accordance with Generic Letter 91-04
Project stage: RAI
GNRO-2013/00038, Response to Request for Additional Information Regarding 18 to 24 Month License Amendment Request (TAC ME9764) Dated May 1, 20132013-06-0404 June 2013
Response to Request for Additional Information Regarding 18 to 24 Month License Amendment Request (TAC ME9764) Dated May 1, 2013
Project stage: Response to RAI
ML13171A2252013-06-20020 June 2013
Email, Audit Plan for 6/24/13 Audit for Review of Calculations in Support of Amendment Request to Revise Technical Specifications and Surveillance Requirements for Operation with a 24-Month Fuel Cycle in Accordance with GL 91-04
Project stage: Other
GNRO-2013/00058, Response to NRC Regulatory Issue Summary 2013-06, Preparation and Scheduling of Operator Licensing Examinations2013-08-14014 August 2013
Response to NRC Regulatory Issue Summary 2013-06, Preparation and Scheduling of Operator Licensing Examinations
Project stage: Request
GNRO-2013/00024, Response to Request for Additional Information Re 18 to 24 Month License Amendment Request, Dated March 18, 20132013-08-15015 August 2013
Response to Request for Additional Information Re 18 to 24 Month License Amendment Request, Dated March 18, 2013
Project stage: Response to RAI
ML13260A0062013-09-16016 September 2013
Email, Request for Additional Information, Round 3, Request to Revise Technical Specifications and Surveillance Requirements to Support Operation with a 24-Month Fuel Cycle in Accordance with Generic Letter 91-04
Project stage: RAI
GNRO-2013/00076, Supplemental Information to Clarify License Amendment Request for Implementing a 24-Month Fuel Cycle at Grand Gulf Nuclear Station, Unit 12013-09-24024 September 2013
Supplemental Information to Clarify License Amendment Request for Implementing a 24-Month Fuel Cycle at Grand Gulf Nuclear Station, Unit 1
Project stage: Supplement
ML13323A5512013-10-0808 October 2013
Attachment 2 to GNRO-2013/00088, JC-Q1B21-N678-1 Rev. 2 Reactor Steam Dome Pressure Scram Setpoint
Project stage: Other
ML13323A5522013-10-14014 October 2013
Attachment 3 to GNRO-2013/00088, JC-Q1B21-N681-1 Rev. 1 Reactor Pressure Vessel Level One Setpoint Calculation
Project stage: Other
GNRO-2013/00074, Response to Electronic Request for Additional Information Regarding 18 to 24 Month License Amendment Request, Dated September 16, 20132013-10-14014 October 2013
Response to Electronic Request for Additional Information Regarding 18 to 24 Month License Amendment Request, Dated September 16, 2013
Project stage: Request
ML13323A5532013-10-29029 October 2013
Attachment 4 to GNRO-2013/00088, JC-Q1B21-N694-1 Rev. 1 Drywell High Pressure RCIC Isolation Setpoint Calculation
Project stage: Other
ML13323A5542013-11-0404 November 2013
Attachment 5 to GNRO-2013/00088, EN-IC-S-022-G Rev. 0 Instrument Performance Monitoring and Drift Trending Analysis
Project stage: Other
ML13323A5502013-11-0808 November 2013
Attachment 1 to GNRO-2013/00088 JC-Q1P81-90024 Rev. 3 Division III Degraded Bus Voltage Setpoint
Project stage: Other
GNRO-2013/00088, Supplemental Response to Request for Additional Information Regarding 18 to 24 Month Fuel Cycle License Amendment Request (TAC ME9764), Dated May 1, 20132013-11-12012 November 2013
Supplemental Response to Request for Additional Information Regarding 18 to 24 Month Fuel Cycle License Amendment Request (TAC ME9764), Dated May 1, 2013
Project stage: Supplement
GNRO-2013/00094, Supplement to License Amendment Request for Implementing a 24-Month Fuel Cycle2013-12-0505 December 2013
Supplement to License Amendment Request for Implementing a 24-Month Fuel Cycle
Project stage: Supplement
GNRO-2013/00097, Request to Withdraw Supplement to the License Amendment Request for Implementing a 24-Month Fuel Cycle2013-12-11011 December 2013
Request to Withdraw Supplement to the License Amendment Request for Implementing a 24-Month Fuel Cycle
Project stage: Supplement
ML13343A1092013-12-26026 December 2013
Issuance of Amendment No. 197, Revise Technical Specifications and Surveillance Requirements to Support Operation with 24-Month Fuel Cycle in Accordance with Generic Letter 91-04
Project stage: Approval
2013-12-26
[Table View] |
Text
From:
Wang, Alan To:
Ward, Steven; SEITER, JEFFERY ALAN Cc:
Lent, Susan; Burkhardt, Janet; Robinson, Christopher
Subject:
Grand Gulf Nuclear Station Request for Additional Information Regarding 18 to 24 Month License Amendment Request (TAC ME9764)
Date:
Wednesday, May 01, 2013 11:23:11 AM Jeff and Steve, By letter dated October 2, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12277A080), Entergy Operations, Inc. (the licensee) submitted a license amendment request (LAR) to amend the technical specifications (TS) of Grand Gulf Nuclear Station (GNNS), Unit 1. The LAR proposes to extend certain 18-month TS surveillance requirement (SR) frequency to 24-months SR frequency to accommodate a 24-month fuel cycle.
The NRC staff has determined that additional information is needed to complete our review of this request. The following requests for additional information (RAIs) are related to your LAR dated October 2, 2012:
- 1. LAR Section 3.1, states GNNS setpoint calculations, and affected calibration and functional test procedures, have been revised, or will be revised prior to implement to reflect the new 30-month drift values. The revised setpoint calculations were developed in accordance with Setpoint Methodology JS-09, Rev. 1, Methodology for the Generation of Instrument Loop Uncertainty & Setpoint Calculations.
Please provide calculations used for the evaluation of the as-left tolerance, as-found tolerance, total loop uncertainty, nominal trip setpoint, and allowable value for representative TS functions, including the loss of voltage (i.e., for SR 3.3.8.1.3 Function 3.3.8.1-1.2a), and degraded voltage (i.e., for SR 3.3.8.1.3 Function 3.3.8.1-1.2c), functions in TS Table 3.3.8.1-1, Loss of Power Instrumentation.
Please also describe how the tolerances included in these setpoint calculations comply with the 95/95 confidence level specified in Regulatory Guide 1.105, Setpoints for Safety-Related Instrumentation, Revision 3, issued December 1999 (ADAMS Accession No. ML993560062).
Please provide procedures or describe actions to be taken when (a) the as-found data is beyond the as-found tolerance limit established in the setpoint calculation, (b) when, at the end of the surveillance test, the instrument channel cannot be set within the as-left tolerance limit established in the setpoint calculation, and (c) when the as-found data is beyond allowable value during surveillance tests.
- 2. LAR Attachment 5 states that the proposed changes were evaluated in accordance with the guidance provided in the U.S. Nuclear Regulatory Commission (NRC)
Generic Letter (GL) 91-04, Changes in Technical Specification Surveillance Intervals to Accommodate a 24-Month Fuel Cycle, dated April 2, 1991 (ADAMS Accession No. ML013100215).
Please provide representative drift calculations, including drift evaluation for the
loss of voltage (i.e., for SR 3.3.8.1.3 Function 3.3.8.1-1.2a), and degraded voltage (i.e., for SR 3.3.8.1.3 Function 3.3.8.1-1.2c), functions in TS Table 3.3.8.1-1, Loss of Power Instrumentation. Please describe how the calculations address:
- a. The number of samples used and the number of outliers rejected in the drift evaluation to ensure 95/95 confidence level specified in Regulatory Guide 1.105.
- b. How the drift data was grouped properly to ensure a normal distribution of the drift samples.
- c. The methodology used to calculate the drift limit for 30-month fuel cycles from the current plant drift data for 18-month fuel cycles.
This RAI was discussed with Mr. Steven Ward on May 1, 2013, and it was agreed that a response would be provided within 30 days of receipt of this email. If circumstances result in the need to revise the requested response date, please contact me at (301) 415-1445 or via e-mail at Alan.Wang@nrc.gov.
Alan Wang Project Manager (Grand Gulf Nuclear Station)
Nuclear Regulatory Commission Division of Operating Reactor Licensing Alan.Wang@NRC.gov Tel: (301) 415-1445 Fax: (301) 415-1222
