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Category:Memoranda
MONTHYEARML23047A3822023-03-21021 March 2023
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ML20150A4212020-11-23023 November 2020
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Summary of June 25, 2020 Teleconference with Grand Gulf Nuclear Station
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FEMA Region IV Memo 07-16-19: Hurricane Barry Preliminary Capabilities Assessment
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FEMA Region VI Memo 07-15-19: Hurricane Barry Preliminary Capabilities Assessment
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Safety Evaluation Input for Grand Gulf Nuclear Station Unit 1, License Amendment Request to Implement Technical Specification Task Force-425, Revision 3, Relocate Surveillance Frequencies to Licensee Control
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Cancelling Numerous Inspection Report Numbers
ML16287A5902016-11-17017 November 2016
Renewal of Full-Power Operating Licenses for Grand Gulf Nuclear Station Unit 1 (TAC No. ME7493)
ML16294A2072016-10-27027 October 2016
Communications Plan Regarding the Renewal of the Grand Gulf Nuclear Station Unit 1, Operating License
ML16210A5262016-07-28028 July 2016
License Renewal Application
ML16067A2402016-03-31031 March 2016
Advisory Committee on Reactor Safeguards Review of the Grand Gulf Nuclear Station, Unit 1, License Renewal Application - Transmittal of Final Safety Evaluation Report
ML16088A2042016-03-28028 March 2016
Memo T Bowers from s Ruffin, Technical Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations W/ Encl 2 (Template)
ML16088A2052016-03-28028 March 2016
Enclosure 1 - (72.30 DFP Reviews to Be Completed 2015) - Memo T Bowers from s Ruffin, Technial Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations
ML15324A0862015-11-24024 November 2015
Summary of Conference Call Confirming Staff Understanding of Basis for Closing Open Item in Grand Gulf Reevaluated Flood Hazard Staff Assessment of Response to 10 CFR 50.54(f) Information Request- Flood Causing Mechanism Reevaluation
ML15195A3552015-08-31031 August 2015
Issuance of Amendment Request for Changing Five Technical Specifications Allowable Values
ML14163A7302014-06-12012 June 2014
Supplemental Inspection Charter to Evaluate Licensee Actions Related to Pi for Unplanned Scrams Per 7000 Critical Hours, Which Crossed Green-White Threshold During First Quarter 2013
ML14043A1102014-02-28028 February 2014
01/29/2014 Summary of Public Meetings to Discuss Draft Supplement 50 to the Generic Environmental Impact Statement for License Renewal of Nuclear Plants Regarding Grand Gulf, Unit 1, (TAC Nos ME7385 and ME7386)
ML13207A0462013-07-26026 July 2013
EA-13-058 Teleconference Notice
ML13182A4262013-07-0202 July 2013
Notice of Forthcoming Meeting with Entergy Operations, Inc., for a Predecisional Enforcement Conference Related to the Grand Gulf Nuclear Station (EA-13-058)
ML12334A5862013-01-0303 January 2013
Summary of Telephone Conference Call Held on October 9, 2012, Between the U.S. Nuclear Regulatory Commission and Entergy Operations, Inc., Concerning Requests for Additional Information Pertaining to the Grand Gulf Nuclear Station
ML12264A6492012-11-15015 November 2012
Summary of Telephone Conference Call Held on August 29, 2012, Between the NRC and Entergy, Concerning RAI Pertaining to the Grand Gulf Nuclear Station, LRA
ML12264A3922012-11-0909 November 2012
Summary of Telephone Conference Call Held on 9/04/12 Between the Us NRC and Entergy Operations, Inc. Concerning Requests for Additional Information Pertaining to the Grand Gulf Nuclear Station, License Renewal Application
ML12202A2142012-08-15015 August 2012
5/30/12 Summary of Telephone Conference Call Held Between the U.S. Nuclear Regulatory Commission and Entergy Operations, Inc., Concerning Requests for Additional Information Pertaining to the Grand Gulf Nuclear Station, LRA
ML1213804832012-05-22022 May 2012
Memo to File, Verbal Authorization of Relief Request ISI-17, Use of ASME Code Cases N-638-4 and N-504-4 for Alternative Repair of RHR LPCI Weld During Refueling Outage RF-18, Third 10-Year Inservice Inspection Interval
ML1201303402012-01-18018 January 2012
1/30/2012-Notice of Forthcoming Meeting with Entergy Operations, Inc., to Discuss Schedule for Completion of Steam Dryer Review Related to Grand Gulf Nuclear Station, Unit 1, Extended Power Uprate
ML11362A4332012-01-0606 January 2012
Forthcoming Meeting to Discuss the License Renewal Process and Environmental Scoping for Grand Gulf Nuclear Station, Unit 1, License Renewal Application
ML11333A2452011-11-29029 November 2011
Acceptance of License Renewal Application, Grand Gulf Nuclear Station, Unit 1
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Notice of Meeting with Entergy Operations, Inc., to Discuss Implementation of Quality Oversight and Verification Programs at Entergy Sites Including Actions Being Taken to Enhance Effectiveness
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Notice of Meeting with Entergy Operations, Inc., to Discuss Fleetwide Submittal for Proposed Technical Specification and Quality Assurance Program Manual Changes Related to Unit Staff Qualification Requirements
ML1029401582010-11-0505 November 2010
Acceptance of License Amendment Request for an Extended Power Uprate (Epu), Grand Gulf Nuclear Station, Unit 1
ML0914701272009-06-0303 June 2009
Memo to Michael T. Lesar from John Goshen Federal Register Notice Publishing an Environmental Assessment and Finding of No Significant Impact for a Request for an Exemption from 10 CFR 72.212(a)(2) and 10 CFR 72.212(b)(7)
ML0807400842008-03-14014 March 2008
Draft Regulatory Guide for Comment
ML0614505922006-05-26026 May 2006
Wits 200600198 - Actions to Be Taken in Response to Hurricane Lessons Learned Task Report
ML0607302642006-03-0707 March 2006
Closure Memorandum: Issue for Resolution 2005-083: Evaluation: Part 21 - Engine Systems - Governor Drive Coupling Element
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Draft Information Memo - May 6 - May 27, 2005
ML0506104872005-03-23023 March 2005
Draft Information Memo - May 1, 2005 Thru May 27, 2005
ML0429402412004-10-25025 October 2004
Draft Information for June 1, 2004 to June 30, 2004
ML0423804012004-08-27027 August 2004
Draft Information Memo for April 1, 2004 to April 30, 2004 - Marilyn R. Wohl
ML0422602762004-08-12012 August 2004
Meeting Summary of the August 8, 2004 Public Workshop - Region IV Operator Licensing Feedback
ML0408607972004-03-25025 March 2004
Memo to John Harris Re Correction of License Authority Files for Grand Gulf, Unit 1
ML0402202322004-02-23023 February 2004
Draft Information Report for October 3, 2003, to November 24, 2003
ML0330102972003-11-0707 November 2003
Draft Information for August 4, 2003, to October 2, 2003
ML0322601032003-08-18018 August 2003
Draft Information Inputs for June 3, 2003 to July 31, 2003
2023-03-21
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Text
November 24, 2015 MEMORANDUM TO: Mohamed K. Shams, Chief Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation FROM: Michael L. Marshall, Jr., Senior Project Manager /RA/
Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF CONFERENCE CALL CONFIRMING STAFF UNDERSTANDING OF BASIS FOR CLOSING OPEN ITEM IN THE GRAND GULF NUCLEAR STATION, UNIT 1 REEVALUATED FLOOD HAZARD STAFF ASSESSMENT OF RESPONSE TO 10 CFR 50.54(f) INFORMATION REQUEST -
FLOOD-CAUSING MECHANISM REEVALUATION (CAC NO.
MF1102)
On November 18, 2015, U.S. Nuclear Regulatory Commission (NRC) staff from the Japan Lessons-Learned Division in the Office of Nuclear Reactor Regulation and from the Division of Site Safety and Environmental Analysis in the Office of New Reactors spoke with representatives from Entergy Operations, Inc. (the licensee) to confirm the staffs understanding of activities by the licensee that would resolve an open item in staff assessment of the licensees reevaluation of the flooding hazard at Grand Gulf Nuclear Station, Unit 1 (Grand Gulf). Specifically, the open item concerned proposed blockage assumptions concerning 4-foot culverts and vehicle barrier openings. The participants in the conference call are listed in to this memorandum.
BACKGROUND By letter dated March 12, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12053A340), the NRC issued a request for information pursuant to Title 10 of the Code of Federal Regulations, Section 50.54(f) (hereafter referred to as the 50.54(f) letter). The request was issued as part of implementing lessons learned from the accident at the Fukushima Dai-ichi nuclear power plant. Enclosure 2 to the 50.54(f) letter requested licensees to reevaluate flood-causing mechanisms using present-day methodologies and guidance. By letter dated March 11, 2013 (ADAMS Accession No. ML13071A457), the licensee responded to this request for Grand Gulf Nuclear Station, Unit 1. In response to NRC staff questions, this response was supplemented by letter dated January 9, 2014 (ADAMS Accession No. ML14014A277). By letter dated November 25, 2014, the NRC staff sent the licensee a staff assessment of the information provided. However the staff assessment included three open items, including the following open item:
Justify the proposed blocking assumptions on the onsite drainage system (e.g.,
supported by proposed maintenance and flood protection measures implemented
M. Shams through emergency procedures or administrative controls) consistent with the Integrated Assessment interim staff guidance (NRC, 2012c). In particular, the licensee is requested to justify the assumed 50 percent blockage of the 4-foot culverts and 30 percent blockage for vehicle barrier openings.
Subsequent to issuance of the staff assessment, the NRC staff realized that the licensee likely had in place practices, which would be documented in procedures that would support the licensees blockage assumption. In order to confirm the basis for closing the open item, the NRC staff requested a telephone conference with the licensee to verify the staffs understanding of the practices in place that would support the licensees blocking assumptions.
DISCUSSION During the conference call the licensee confirmed the staffs understanding that inspections are included in procedures for verifying that culvert and vehicle barrier openings are clear of debris.
The visual inspections of the culverts are described in the licensees surveillance procedure 06-TE-1000-V-0001, Revision 101, CURVERT NO. 1 EMBANKMENT STABILITY/SURVEY (see ). The visual inspections of the vehicle barrier openings are described in the licensees off-normal event procedure 05-1-02-VI-2, Revision 128, HURRICANES, TORNADOES, AND SEVERE WEATHER (see Enclosure 2). Both of these procedures describe how the licensee will implement periodic surveillances, as well as surveillances before and after intense precipitation events.
In addition to confirming the NRC staffs prior understanding, the licensee described the immediate area around the culverts and vehicle barrier openings. In particular, the licensee clarified that security screens discussed in staffs issued staff assessment only pertain to the 15-ft diameter culverts, not the 4-ft diameter culverts. The licensee discussed how there is no historical evidence of blockage during past intense weather events, and that trees around several of the drainage canals had been cut-down and removed to further lessen the chance for leaf debris or fallen trees to block or clog the canals. The licensee, also, discussed how weather forecasts and alerts are transmitted to operators at the site. In addition to privately-operated weather services, the licensee discussed how they receive and monitor weather alerts issued by National Oceanic and Atmospheric Administrations National Weather Service.
M. Shams Based on the confirmation of the NRC staffs prior understanding, the NRC staff informed the licensee that it had sufficient information to now close the open item. The NRC staff informed the licensee that the NRC staff would document the closure of the open item in a supplement to the staff assessment.
Docket No. 50-416
Enclosures:
- 1. List of Conference Call Participants
- 2. Bentley, Donald E., Entergy Operations, Inc.,
email to Hall, Victor, U.S. Nuclear Regulatory Commission, November 18, 2015.
CONFERENCE CALL PARTICIPANTS November 18, 2015 Name Organization Hosung Ahn U. S Nuclear Regulatory Commission (NRC)
Don Bentley Entergy Operations, Inc. (Entergy)
Dan Brown Areva Andy Campbell NRC Chris Cook NRC Victor Hall NRC Fred Hopkins Entergy Tori Liggans-Robinson Entergy Michael Marshall NRC Aida Rivera-Varona NRC Enclosure 1
ML15324A086 *via email OFFICE NRR/JLD/JHMB/PM NRR/JLD/JHMB/PM NRR/JLD/LA NAME MMarshall VHall SLent DATE 11/23/2015 11/23/2015 11/23/2015 OFFICE NRO/DSEA/RHM/BC NRR/JLD/JHMB/BC NRR/JLD/JHMB/PM NAME CCook* MShams MMarshall DATE 11/23/2015 11/24/2015 11/24/2015
