Letter Sequence Meeting |
|---|
TAC:MF2400, Control Room Habitability (Approved, Closed) TAC:MF2401, Control Room Habitability (Approved, Closed) TAC:MF2402, Control Room Habitability (Open) TAC:MF2403, Control Room Habitability (Open) TAC:MF2404, Control Room Habitability (Open) TAC:MF2405, Control Room Habitability (Open) TAC:MF2406, Control Room Habitability (Open) TAC:MF2407, Control Room Habitability (Open) TAC:MF2408, Control Room Habitability (Open) TAC:MF2409, Control Room Habitability (Open) |
Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance
- Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement
Administration
- Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance
- Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting
Results
Other: ML13295A222, ML13323A183, ML13323A186, ML13323A189, ML13323A190, ML13323A191, ML13323B187, ML13323B188, ML13323B191, ML13323B194, ML13323B196, ML13323B198, ML13323B199, ML13323B200, ML13323B201, ML13323B202, ML13323B204, ML13323B207, ML13323B208, ML13323B209, ML13338A165, ML14015A312, ML14052A053, ML14072A076, ML14086A386, ML14086A387, ML14087A126, ML14149A089, ML14149A353, ML14149A354, ML14149A434, ML14149A435, ML14149A437, ML14178A481, ML14178A485, ML14202A045, ML14321A438, ML14321A677, ML14344A545, ML14344A546, ML14344A547, ML14349A790, ML15072A092, ML15091A440, ML15119A326, ML15175A024, ML15183A007, ML15183A009, ML15246A126, ML15246A128... further results
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MONTHYEARML13323B1962012-06-12012 June 2012
Attachment 4: CHLE-008, Rev. 3, Debris Bed Preparation and Formation Test Results
Project stage: Other
ML13323B1942012-08-11011 August 2012
Attachment 3: CHLE-007, Rev. 3, Debris Bed Requirements and Preparation Procedures
Project stage: Other
NOC-AE-13003040, Attachment 1: CHLE-005, Rev. 1, Determination of the Initial Pool Chemistry for the Chle Test.2012-08-13013 August 2012
Attachment 1: CHLE-005, Rev. 1, Determination of the Initial Pool Chemistry for the Chle Test.
Project stage: Other
ML13323B1882012-08-13013 August 2012
Attachment 1: CHLE-005, Rev. 1, Determination of the Initial Pool Chemistry for the Chle Test
Project stage: Other
ML13323B1912012-08-14014 August 2012
Attachment 2: CHLE-006, Rev. 1, STP Material Calculations
Project stage: Other
ML13323B1982012-08-19019 August 2012
Attachment 5: CHLE-010, Rev. 2, Chle Tank Test Results for Blended and NEI Fiber Beds with Aluminum Addition
Project stage: Other
ML13323B1992013-01-0909 January 2013
Attachment 6: CHLE-012, Rev. 3, T1 Mbloca Test Report, Cover Through Figure 52
Project stage: Other
ML13323B2002013-01-0909 January 2013
Attachment 6: CHLE-012, Rev. 3, T1 Mbloca Test Report, Figure 53 Through End
Project stage: Other
ML13323B2022013-01-15015 January 2013
Attachment 8: CHLE-015, Rev. 3, Summary of Chemical Effects Testing in 2012 for STP GSI-191 License Submittal
Project stage: Other
ML13323B2012013-01-22022 January 2013
Attachment 7: CHLE-014, Rev. 2, T2 LBLOCA Test Report
Project stage: Other
ML13323B2042013-01-22022 January 2013
Attachment 9: CHLE-016, Rev. 2, Calculated Material Release to Estimate Chemical Effects
Project stage: Other
ML13043A0132013-01-31031 January 2013
Pilot Submittal and Request for Exemption for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191
Project stage: Request
ML13214A0312013-08-13013 August 2013
Acceptance Review, Exemption Requests and License Amendment Request to Revise UFSAR for Resolution of Generic Safety Issue 191, Assessment of Debris Accumulation on PWR Sump Performance (TAC MF0613-MF0614; MF2400-09)
Project stage: Acceptance Review
ML13323B2072013-09-16016 September 2013
Attachment 10: CHLE-018, Rev. 2, Results of Bench Tests to Assess Corrosion of Aluminum in STP Containment Conditions
Project stage: Other
ML13323B2082013-09-23023 September 2013
Attachment 11: CHLE-019, Rev. 2, Test Results for Chemical Effect Tests Stimulating Corrosion and Precipitation (T3 & T4)
Project stage: Other
NOC-AE-13003039, Corrections to Information Provided in Revised STP Pilot Submittal and Requests for Exemptions and License Amendment for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)2013-10-0303 October 2013
Corrections to Information Provided in Revised STP Pilot Submittal and Requests for Exemptions and License Amendment for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)
Project stage: Other
ML13295A2222013-10-0303 October 2013
Corrections to Information Provided in Revised STP Pilot Submittal and Requests for Exemptions and License Amendment for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)
Project stage: Other
ML13323B2092013-10-0404 October 2013
Attachment 12: CHLE-020, Rev. 2, Test Results for a 10-day Chemical Effects Test Simulating LBLOCA Conditions (T5)
Project stage: Other
ML13323A1892013-10-22022 October 2013
Enclosure 4-2 - Risk-Informed Closure of GSI-191, Volume 2 Probabilistic Risk Analysis
Project stage: Other
ML13323B1872013-10-31031 October 2013
Submittal of GSI-191 Chemical Effects Test Reports
Project stage: Other
ML13323A1912013-11-0606 November 2013
Enclosure 4-3 Risk-Informed Closure of GSI-191, Volume 3, Engineering (Casa Grande) Analysis, Page 212 of 1-122
Project stage: Other
ML13323A1902013-11-0606 November 2013
Enclosure 4-3 Risk-Informed Closure of GSI-191, Volume 3, Engineering (Casa Grande) Analysis, Cover - Page 211 of 248
Project stage: Other
ML13323A1862013-11-12012 November 2013
Enclosure 4-1 - Risk-Informed Closure of GSI-191, Volume 1
Project stage: Other
ML13323A1852013-11-13013 November 2013
Enclosure 3 - License Amendment Request for STP Piloted Risk-Informed Approach to Closure for GSI-191
Project stage: Request
NOC-AE-13003043, Enclosure 5 - Response to NRC Supplemental Information Items2013-11-13013 November 2013
Enclosure 5 - Response to NRC Supplemental Information Items
Project stage: Supplement
ML13323A1922013-11-13013 November 2013
Enclosure 5 - Response to NRC Supplemental Information Items
Project stage: Supplement
ML13316B9052013-11-13013 November 2013
Albrz Testing Update for NRR Final
Project stage: Request
ML13323A1832013-11-13013 November 2013
To Revised STP Pilot Submittal and Requests for Exemptions and License Amendment for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)-191
Project stage: Other
ML13338A1652013-11-21021 November 2013
To Revised STP Pilot Submittal for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)-191 to Supersede and Replace the Revised Pilot Submittal
Project stage: Other
NOC-AE-13003054, Supplement 1 to Revised STP Pilot Submittal for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)-191 to Supersede and Replace the Revised Pilot Submittal2013-11-21021 November 2013
Supplement 1 to Revised STP Pilot Submittal for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)-191 to Supersede and Replace the Revised Pilot Submittal
Project stage: Supplement
ML13330B2222013-12-0505 December 2013
Notice of Meeting with STP Nuclear Operating Company to Discuss Revised Pilot Submittal and Request for Exemptions for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191 at South Texas Project, Units 1 and 2 (TAC MF2400-MF24
Project stage: Meeting
NOC-AE-13003065, Response to STP-GSI-191-EMCB-RAI-12013-12-23023 December 2013
Response to STP-GSI-191-EMCB-RAI-1
Project stage: Other
ML14015A3112013-12-23023 December 2013
Response to NRC Request for Reference Document for STP Risk-Informed GSI-191 Application
Project stage: Request
05000498/LER-2013-003, Regarding Unanalyzed Condition - Direct Current Ammeter Circuits Without Overcurrent Protection2013-12-23023 December 2013
Regarding Unanalyzed Condition - Direct Current Ammeter Circuits Without Overcurrent Protection
Project stage: Request
ML14015A3122013-12-23023 December 2013
Response to STP-GSI-191-EMCB-RAI-1
Project stage: Other
NOC-AE-13003070, Response to NRC Request for Reference Document for STP Risk-Informed GSI-191 Application2013-12-23023 December 2013
Response to NRC Request for Reference Document for STP Risk-Informed GSI-191 Application
Project stage: Request
ML13357A2662013-12-24024 December 2013
1/8/14 - Notice of Meeting with STP Nuclear Operating Co. to Discuss Revised Pilot Submittal and Request for Exemptions for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191 at South Texas Project, Units 1 and 2
Project stage: Meeting
ML14009A3072014-01-0909 January 2014
NRR E-mail Capture - Request for Additional Information - TACs MF2400 Through MF2409
Project stage: RAI
NOC-AE-13003057, Response to Request for Additional Information Re Use of RELAP5 in Analyses for Risk-Informed GSI-191 Licensing Application2014-01-0909 January 2014
Response to Request for Additional Information Re Use of RELAP5 in Analyses for Risk-Informed GSI-191 Licensing Application
Project stage: Response to RAI
ML14029A5332014-01-0909 January 2014
Response to Request for Additional Information Re Use of RELAP5 in Analyses for Risk-Informed GSI-191 Licensing Application
Project stage: Response to RAI
ML14015A0452014-01-14014 January 2014
NRR E-mail Capture - RAIs Regarding South Texas Projects Submittal for Risk-Informed Resolution of GS-191
Project stage: RAI
ML13358A0622014-01-14014 January 2014
Summary of 12/16/13 Meeting with STP Nuclear Operating Co. to Discuss Revised Pilot Submittal and Request for Exemptions for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191 at South Texas Project, Units 1 and 2
Project stage: Meeting
ML14052A0542014-02-13013 February 2014
STP-Specific Casa Grande Inputs CASA01 JT4, CASA09 JT4, CASA22 JT4, CASA26 JT4, & CASA43 JT4
Project stage: Request
ML14052A0532014-02-13013 February 2014
Submittal of Casa Grande Code & Analyses for Risk-Informed GSI-191 Licensing Application
Project stage: Other
ML14149A4352014-02-14014 February 2014
ALION-REP-STP-8998-02, Rev. 0, STP Casa Grande Analysis and LAR Enclosure 4-3 RAI Response, Enclosure 1 to Attachment 1
Project stage: Other
ML14072A0842014-02-18018 February 2014
CHLE-012, T1 Mbloca Test Report, Revision 4
Project stage: Request
ML14072A0792014-02-22022 February 2014
CHLE-020, Test Results for 10-Day Chemical Effects Test Simulating LBLOCA Condition (T5), Revision 3
Project stage: Request
ML14072A0852014-02-22022 February 2014
CHLE-014, T2 LBLOCA Test Report, Revision 3
Project stage: Request
ML14072A0822014-02-23023 February 2014
CHLE-008, Debris Bed Preparation & Formation Test Results, Revision 4
Project stage: Request
ML14072A0832014-02-24024 February 2014
CHLE-010, Chle Tank Test Results for Blended and NEI Fiber Beds with Aluminum Addition, Revision 3
Project stage: Request
2013-11-21
[Table View] |
7/2/15 Summary of Meeting with STP Nuclear Operating Company to Discuss Revised Pilot Submittal and Request for Exemptions for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191 at South Texas, Units 1 and 2| ML15201A003 |
| Person / Time |
|---|
| Site: |
South Texas  |
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| Issue date: |
07/30/2015 |
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| From: |
Lisa Regner
Plant Licensing Branch IV |
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| To: |
Koehl D
South Texas |
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| Regner L |
| References |
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| TAC MF2400, TAC MF2401, TAC MF2402, TAC MF2403, TAC MF2404, TAC MF2405, TAC MF2406, TAC MF2407, TAC MF2408, TAC MF2409 |
| Download: ML15201A003 (7) |
|
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 30, 2015 LICENSEE:
STP Nuclear Operating Company FACILITY:
South Texas Project, Units 1 and 2
SUBJECT:
SUMMARY
OF JULY 2, 2015, PUBLIC MEETING WITH STP NUCLEAR OPERATING COMPANY TO DISCUSS THE LICENSE AMENDMENT AND EXEMPTION REQUESTS TO USE A RISK-INFORMED APPROACH TO THE RESOLUTION OF GENERIC SAFETY ISSUE 191, "ASSESSMENT OF DEBRIS ACCUMULATION ON PWR SUMP PERFORMANCE" (TAC NOS. MF2400, MF2401, MF2402, MF2403, MF2404, MF2405, MF2406, MF2407, MF2408, AND MF2409)
On July 2, 2015, a public meeting was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of STP Nuclear Operating Company (STPNOC, the licensee), at NRC Headquarters, Rockville, Maryland. The meeting notice and agenda, dated June 22, 2015, are located in the Agencywide Documents Access and Management System (ADAMS) at Accession No. ML15173A343. A list of meeting attendees is provided in the Enclosure to this meeting summary.
By letter dated June 19, 2013 (ADAMS Accession No. ML131750250), as supplemented by letters dated October 3, October 31, November 13, November 21 and December 23, 2013 (two letters); and January 9, February 13, February 27, March 17, March 18, May 15 (two letters),
May 22, June 25, and July 15, 2014; and March 10 and 25, 2015 (ADAMS Accession Nos. ML13295A222, ML13323A673, ML13323A128, ML13338A165, ML14015A312, ML14015A311, ML14029A533, ML14052A053, ML14072A076, ML14086A383, ML14087A126, ML14149A353, ML14149A354, ML14149A434, ML14178A481, ML14202A045, ML15072A092, and ML15091A440, respectively), STPNOC submitted exemption requests accompanied by a license amendment request (LAR) for a risk-informed approach to resolve Generic Safety Issue (GSl)-191, "Assessment of Debris Accumulation on PWR [Pressurized-Water Reactor] Sump Performance," at South Texas Project, Units 1 and 2 (STP).
The purpose of this public teleconference call was to discuss the licensee's upcoming submittal, which the licensee stated it plans to submit in July 2015. The supplement is expected to provide information on the new Risk over Deterministic (RoverD) methodology, and modify the LAR and exemption requests.
Meeting Summary The licensee provided two handouts. The first, Talking Points for July 2, 2015 Public Call, can be found in ADAMS at Accession No. ML15182A180. The second, Deterministic Basis, provides some modifications and additions to portions of the first submittal, and can be found at ADAMS Accession No. ML15182A228.
The licensee stated that the next submittal will have 14 elements and will be an update to the 2008 submittal. It will discuss changes and updates associated with debris generation and transport for fibers, Rovero, deterministic testing, zone of influence (ZOI) changes for fiber and coatings, and chemical effects.
The licensee continued with a discussion of how it will address the NRC staff's concerns associated with the inorganic zinc ZOI assessment (refer to the June 3, 2015, public meeting summary, which can be found in ADAMS at Accession No. ML15180A273). The licensee recognized its testing non-conservatisms associated with epoxy coatings and pointed out its over-conservatisms associated with Marinite, which has since been removed from both containment buildings. The licensee plans to provide an assessment of the impacts of these and other factors on the coatings analyses.
The licensee plans to provide a detailed description of the thermal-hydraulic analyses, changes to CASA Grande from Rovero, additional sensitivity studies for strainer and spray configurations, a focus on mitigation for the defense-in-depth discussion, and a discussion on boric acid precipitation and its reference to Westinghouse Electrical Company LLC's topical report WCAP-16793, Evaluation of Long-Term Cooling Considering Particulate, Fibrous and Chemical Debris in the Recirculating Fluid.
During a discussion on the exemptions, the NRC staff cautioned the licensee's apparent re-definition of the term "single failure" since it has a very specific definition in regulatory and licensing applications. The NRC staff suggested that attempts to re-define single failure for this specific purpose will lead to additional questions and requests for information. The NRC staff emphasized the need for the licensee to provide a strong justification for exemptions since some of the weld failures may produce debris amounts several times the threshold.
The NRC staff questioned an apparent significant reduction in the reported net positive suction head (NPSH) required for the emergency core cooling system and containment spray system pumps. The licensee stated it had changed only the reference point (i.e., assumed zero elevation) for NPSH measurements and that the values were actually the same as previous submittals. The staff suggested that the licensee address several Westinghouse Nuclear Safety Advisory Letters in its containment analysis, explain its methodology, and how it will be described in the Updated Final Safety Analysis Report.
The NRC staff expressed concern with the Leak-Before-Break (LBB) credit discussed in the draft sections of the submittal (first handout, page 9 of 29). Specifically, the staff pointed out that previous industry efforts to use LBS as a basis for removing certain break locations from GSl-191-related analyses were unsuccessful. 1 The licensee stated that the proposed approach does not involve removal of break locations due to LBS and that all break locations are within the scope of the analysis. The licensee further stated that LBB was only mentioned qualitatively as a means of providing additional assurance that overall LOCA frequencies are low. The licensee stated that this distinction would be clarified in the revised submittal.
1 A discussion is included in an NRC letter dated March 4, 2004, to Mr. Antony Pietrangelo, Nuclear Energy Institute at ADAMS Accession No. ML040410433).
The licensee informed the NRC staff that it will complete its responses to a 2008 request for additional information related to GSl-191. Additionally, after a question from the NRC staff, the licensee stated that no break locations will exceed tested inorganic zinc amounts and that the supplement includes a discussion of credit for top-coated inorganic zinc.
The licensee discussed issues regarding safety margins by identifying conservatisms included in the debris analyses for STP. The NRC staff noted that this section also seemed to imply that low risk numbers could be compared with safety margins, a position that appears to depart from agency guidance on risk-informed decision-making (RG 1.174). The licensee stated that it would consider reorganizing this information to clarify that its approach was not inconsistent with existing NRC guidance on risk-informed decisions.
The NRC staff questioned the licensee's schedule for upcoming submittals and if there is a need for another public meeting. The licensee stated that it plans to submit on July 17 of this year, but stated that date would likely slip a week.
Two members of the public attended the call. Mr. Marvin Lewis provided comments relating to leak-before-break credit and disagreement with the NRC staff having off-line discussions while on mute. Ms. Karen Hadden requested copies of the meeting handouts and associated relevant documents to be sent to her by e-mail. No Public Meeting Feedback Forms were received for this meeting.
If you have any questions, please contact me at 301-415-1906 or via e-mail at Lisa. Regner@nrc.gov.
Docket Nos. 50-498 and 50-499
Enclosure:
List of Attendees cc w/encl: Distribution via Listserv Sincerely,
~~~<
Lisa M. Regner, Senior Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
LIST OF A TIENDEES JULY 2. 2015, CONFERENCE CALL WITH STP NUCLEAR OPERATING COMPANY REGARDING RISK-INFORMED APPROACH TO RESOLUTION OF GSl-191 NAME Lisa Regner John Stang Victor Cusumano Matt Yoder Margaret Watford Jeremy Dean CJ Fong Ahsan Sallman Steve Smith John Tsao Marioly Diaz Colon Steve Laur Lindsay Robinson Caroline Tilton Jim Hickey Tim Lupold Andrea Russell Matt Rossi Ashley Guzzetta Osvaldo Pensado Stuart Stothoff Mike Murray Steve Blossom Rob Engen Ernie Kee Wayne Harrison Linda Dyer Wes Schulz SOUTH TEXAS PROJECT. UNITS 1 AND 2 DOCKET NOS. 50-498 AND 50-499 ORGANIZATION U.S. Nuclear Regulatory Commission (NRC)
NRC NRC NRC NRC NRC NRC NRC NRC NRC NRC NRC NRC NRC NRC NRC NRC NRC NRC Southwest Research Institute (contractor for NRC)
Southwest Research Institute (contractor for NRC)
STP Nuclear Operating Company (STPNOC)
STPNOC STPNOC STPNOC STPNOC STPNOC STPNOC Enclosure NAME ORGANIZATION Drew Richards STPNOC Levi Holden STPNOC Mark Coughlin STPNOC Bruce Letellier Alien Science & Technology Janet Leavitt Alien Science & Technology Dominic Munoz Alien Science & Technology Tim Sande ENERCON Karen Hadden SEED Coalition Marvin Lewis Public
Mtg Notice ML15173A343; Mtg Summary ML15201A003; Licensee Handouts ML15182A180 and ML15182A228
- via email OFFICE NRR/DORL/LPL4-1 /PM NRR/DORL/LPL4-1 /LA NRR/DSS/SSIB/BC NRR/DE/EMCB/BC NRR/DSS/STSB/BC NAME LRegner JBurkhardt VCusumano*
Tlupold*
RElliott*
DATE 7/17/15 7/21/15 7/21/15 7/22/15 7/21/15 OFFICE NRR/DRA/APLA/BC NRR/DE/ESGB/BC NRR/DSS/SNPB/BC NRR/DORL/LPL4-1 /BC NRR/DORL/LPL4-1 /PM NAME SRosenberg*
GKulesa*
JDean*
MMarkley LRegner (AGeorge for)
DATE 7/27/15 7/24/15 7/28/15 7/30/15 7/30/15