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| | document type = E-Mail | | | document type = E-Mail |
| | page count = 4 | | | page count = 4 |
| | | project = TAC:MF2400 |
| | | stage = RAI |
| }} | | }} |
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| | =Text= |
| | {{#Wiki_filter:1NRR-PMDAPEm Resource From:George, Andrea Sent:Tuesday, January 14, 2014 3:57 PM To:Harrison Albon; sdblossom@stpegs.com |
| | ; keeej@stpegs.com; lidyer@stpegs.com Cc:mpmurray@stpegs.com; Singal, Balwant; Stang, J ohn; Smith, Stephen; Dozier, Jerry; Parillo, John |
| | |
| | ==Subject:== |
| | RAI's Regarding South Texas Project's Submi ttal for Risk-Informed Resolution of GS-191 (TAC Nos. MF2400 and MF2401) |
| | Attachments:GSI-191AADBRAIs.docx Good afternoon, |
| | |
| | By letter dated June 19, 2013 (Agencywide Document s Access and Management System (ADAMS) Accession Number ML131750250), STP Nuclear Operating Company (STPNOC, the licensee) for South Texas Project (STP), Units 1 and 2, submitted a request for exemptions and license amendment request (LAR) for a risk-informed approach to resolving generic safety issue (G SI)-191. STPNOC provided a supplement to the LAR by letter dated November 13, 20 13 (ADAMS Accession No. ML13323A128). The U.S. Nuclear Regulatory |
| | |
| | Commission (NRC) staff has reviewed the submittals and requests additional information (RAI) as detailed in the attachment. |
| | In accordance with our procedures, a clarification call regarding these RAI's was held on January 14, 2014. |
| | During the clarification call, South Texas Project agreed to respond to these RAIs in 60 days, which is March 15, 2014. |
| | |
| | Please let me know of any questions; I can be reached at 301-415-1081. |
| | |
| | Thank you, |
| | |
| | Andrea George, Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation 301-415-1081 |
| | |
| | Hearing Identifier: NRR_PMDA Email Number: 1013 Mail Envelope Properties (Andrea.George@nrc.gov20140114155700) |
| | |
| | ==Subject:== |
| | RAI's Regarding South Texas Project's Submittal for Risk-Informed Resolution of GS-191 (TAC Nos. MF2400 and MF2401) Sent Date: 1/14/2014 3:57:15 PM Received Date: 1/14/2014 3:57:00 PM From: George, Andrea Created By: Andrea.George@nrc.gov Recipients: "mpmurray@stpegs.com" <mpmurray@stpegs.com> Tracking Status: None "Singal, Balwant" <Balwant.Singal@nrc.gov> Tracking Status: None "Stang, John" <John.Stang@nrc.gov> |
| | Tracking Status: None "Smith, Stephen" <Stephen.Smith@nrc.gov> Tracking Status: None "Dozier, Jerry" <Jerry.Dozier@nrc.gov> Tracking Status: None "Parillo, John" <John.Parillo@nrc.gov> |
| | Tracking Status: None "Harrison Albon" <awharrison@STPEGS.COM> Tracking Status: None "sdblossom@stpegs.com" <sdblossom@stpegs.com> Tracking Status: None "keeej@stpegs.com" <keeej@stpegs.com> Tracking Status: None "lidyer@stpegs.com" <lidyer@stpegs.com> |
| | Tracking Status: None Post Office: Files Size Date & Time MESSAGE 1165 1/14/2014 3:57:00 PM GSI-191AADBRAIs.docx 20409 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received: |
| | Risk Informed GSI-191 Accident Dose Branch (AADB) RAI 1 To ensure a complete and accurate review of the dose consequence analyses, please provide additional information in tabular form describing, for each design basis accident affected by the proposed Risk Informed GSI-191 submittal, all the basic parameters used in the dose consequence analyses. For each parameter, please indicate the current licensing basis (CLB) value, the revised GSI-191 value where applicable, as well as the basis for any changes to the CLB. An example of the input/assumptions needed is provided in Table 4.3-11 "Dose Analysis Inputs for LOCA" provided in STP's alternate source term submittal [Agencywide Documents Access Management System (ADAMS) Accession No. ML070890474] |
| | . The staff requests that the information provided include all of the basic parameters whether or not the individual parameter is being changed for the GSI-191 amendment. The staff also requests that the information be provided in separate tables for each affected accident (i.e., loss-of-coolant accident (LOCA), the fuel handing accident (FHA), the main steam line break accident (MSLB), the steam generator tube rupture accident (SGTR), the control rod ejection accident (CREA), |
| | and the locked rotor accident (LRA)). |
| | Risk Informed GSI-191 AADB RAI 2 |
| | |
| | STP identified the following condition related to the alternative source term (AST) license amendments currently in effect at STP Units 1 and 2. Westinghouse Electric Company Nuclear Safety Advisory Letter (NSAL)-06-15, dated December 13, 2006, advised operators of Westinghouse plants that the single-failure scenario for the SGTR analysis that licensees used in their accident analysis may not be limiting. As stated in the STP AST NRC Safety Evaluation dated March 6, 2008 (ADAMS Accession No. ML080160013), "The licensee has evaluated the applicability of NSAL-06-15 against the accident analysis assumptions and has determined that the current single-failure assumption for the STP SGTR analysis is not limiting. Therefore, the licensee is operating under compensatory measures to meet regulatory dose guidelines. The licensee plans to resolve this condition at the earliest opportunity so that the assumptions, including the limiting single failure, for the SGTR accident analysis described herein are consistent with the plant response to this event. To support the limiting single-failure assumptions in the SGTR analysis, STP will maintain an administrative limit for reactor coolant system (RCS) dose equivalent iodine 131 (DEI) so that the radiological dose reference values for the SGTR analysis remain bounding, and the licensee will continue to comply with GDC 19." |
| | |
| | Has this condition been resolved? If so, how? Also, provide justification that GDC 19 continues to be met. |
| | Risk Informed GSI-191 AADB RAI 3 The LOCA analysis assumes that iodine will be removed from the containment atmosphere by containment spray and natural diffusion to the containment walls. As a result of these removal mechanisms a large fraction of the released activity will be deposited in the containment sump. |
| | The sump water will retain soluble gases and soluble fission products such as iodines and cesium, but not noble gases. The guidance from RG 1.183 specifies that the iodine deposited in the sump water can be assumed to remain in solution as long as the containment sump pH is |
| | |
| | maintained at or above 7. |
| | The AST application indicates: |
| | |
| | "After the first day, the containment sump pH will begin to decrease, reaching 6.8 by the end of the 30-day duration of the radiological consequence analysis for the DBA LOCA, and the impact of that decrease has been reflected in the Control Room and offsite doses." |
| | It is noted that the AST application further indicates: |
| | |
| | "The design inputs for calculating the containment sump pool pH were conservatively established by the licensee to maximize the acidic contribution to sump pH and minimize the basic contribution." |
| | The GSI-191 application indicates the possibility that debris generated during a LOCA could clog the containment sump strainers in pressurized-water reactors (PWRs) and result in loss of net positive suction head (NPSH) for the ECCS and CSS pumps, impeding the flow of water from the sump. |
| | Discuss the exemption justification as they relate to the effects on sump water pH, radiological consequences, and loss of the containment spray system.}} |
Letter Sequence Other |
|---|
|
Initiation
- 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: ML13323A186, ML13323A189, ML13323A190, ML13323A191, ML13323B187, ML13323B191, ML13323B194, ML13323B196, ML13323B198, ML13323B199, ML13323B200, ML13323B201, ML13323B202, ML13323B204, ML13323B207, ML13323B208, ML13323B209, ML14015A045, ML14052A053, ML14072A076, ML14086A386, ML14149A089, ML14149A434, ML14149A435, ML14178A481, ML14321A438, ML14321A677, ML14344A545, ML14344A546, ML14349A790, ML15119A326, ML15175A024, ML15183A007, ML15183A009, ML15246A128, ML15246A129, ML15265A601, ML16230A232, 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), NOC-AE-13003040, Attachment 1: CHLE-005, Rev. 1, Determination of the Initial Pool Chemistry for the Chle Test., NOC-AE-13003065, Response to STP-GSI-191-EMCB-RAI-1, NOC-AE-14003082, Alternate Source Term Dose Analysis: an Estimate of Risk Attributed to GSI-191, Attachment 3, NOC-AE-14003101, Enclosure 1 to Enclosure 6 Concerning Second Set of Responses to April 2014, Requests for Additional Information Regarding STP Risk-Informed GSI-191 Application, NOC-AE-14003103, University of Texas White Paper, Means of Aggregation and NUREG-1829: Geometric and Arithmetic Means, Rev. 3, Enclosure 2 to Attachment 1, NOC-AE-14003104, Revised Affidavit for Withholding for Casa Grande Analyses for Risk-Informed GSI-191 Licensing Application, NOC-AE-14003105, Third Set of Responses to April, 2014, Requests for Additional Information Regarding STP Risk-Informed GSI-191 Licensing Application, NOC-AE-14003106, Second Submittal of Casa Grande Source Code for Stp'S Risk-Informed GSI- 191 Licensing Application, NOC-AE-14003111, Submittal of Casa Grande Source Code for Stp'S Risk-Informed GSI-191 Licensing Application, NOC-AE-14003190, Attachment 2 to NOC-AE-14003190 - ALION-REP-STP-8998-14, Strainer Test Plan in Support of STP Pilot Risk-Informed GSI-191 Pilot Licensing Application, NOC-AE-15003220, Description of Revised Risk-Informed Methodology and Responses to Round 2 Requests for Additional Information Regarding STP Risk-Informed GSI-191 Licensing Application... further results
|
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
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
ML13323B2042013-01-22022 January 2013
Attachment 9: CHLE-016, Rev. 2, Calculated Material Release to Estimate Chemical Effects.
Project stage: Other
ML13323B2012013-01-22022 January 2013
Attachment 7: CHLE-014, Rev. 2, T2 LBLOCA Test Report.
Project stage: Other
NOC-AE-13002954, Pilot Submittal and Request for Exemption for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-1912013-01-31031 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
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
Project, Units 1 & 2, Submittal of GSI-191 Chemical Effects Test Reports (TAC Nos. MF2400 and MF2401)
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
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
ML13323A1832013-11-13013 November 2013
Project Units 1 and 2 - Supplement 1 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: Supplement
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
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
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
ML14009A3072014-01-0909 January 2014
NRR E-mail Capture - Request for Additional Information - TACs MF2400 Through MF2409
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
ML14015A0452014-01-14014 January 2014
NRR E-mail Capture - Rai'S Regarding South Texas Project'S Submittal for Risk-Informed Resolution of GS-191
Project stage: Other
NOC-AE-14003081, STP-Specific Casa Grande Inputs CASA01 JT4, CASA09 JT4, CASA22 JT4, CASA26 JT4, & CASA43 JT42014-02-13013 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
Project Units 1 & 2, Submittal of Casa Grande Code & Analyses for Risk-Informed GSI-191 Licensing Application
Project stage: Other
ML14149A4352014-02-14014 February 2014
Project, Units 1 and 2 - 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
ML14072A0762014-02-27027 February 2014
Project, Units 1 and 2, Submittal of GSI-191 Chemical Effects Test Reports (TAC Nos. MF2400 and MF2401)
Project stage: Other
ML14072A2112014-03-0606 March 2014
NRR E-mail Capture - STP Sensitivity Report and Presentation for Proposed Meeting
Project stage: Request
NOC-AE-14003082, Alternate Source Term Dose Analysis: an Estimate of Risk Attributed to GSI-191, Attachment 32014-03-11011 March 2014
Alternate Source Term Dose Analysis: an Estimate of Risk Attributed to GSI-191, Attachment 3
Project stage: Other
ML14086A3862014-03-17017 March 2014
STP Risk-Informed GSI-191 Aadb RAI 3 Response, Attachment 2
Project stage: Other
ML14086A3852014-03-17017 March 2014
Project, Units 1 & 2 - Response to NRC Accident Dose Branch Request for Additional Information Regarding STP Risk-Informed GSI-191 Application
Project stage: Request
NOC-AE-14003111, Submittal of Casa Grande Source Code for Stp'S Risk-Informed GSI-191 Licensing Application2014-03-18018 March 2014
Submittal of Casa Grande Source Code for Stp'S Risk-Informed GSI-191 Licensing Application
Project stage: Other
NOC-AE-14003114, Seismic Hazard and Screening Report (CEUS Sites), Response NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai..2014-03-31031 March 2014
Seismic Hazard and Screening Report (CEUS Sites), Response NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai..
Project stage: Request
ML14091A4522014-04-0808 April 2014
Request for Withholding Information from Public Disclosure - 12/9/13 G. Powell, STPNOC Affidavit Enclosing RELAP5 Digital Media Related to GSI-191 License Amendment and Exemption Requests
Project stage: Withholding Request Acceptance
ML14087A0752014-04-15015 April 2014
Request for Additional Information, Request for Exemptions and Revised Pilot License Amendment Request for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191
Project stage: RAI
NOC-AE-14003103, University of Texas White Paper, Means of Aggregation and NUREG-1829: Geometric and Arithmetic Means, Rev. 3, Enclosure 2 to Attachment 12014-04-18018 April 2014
University of Texas White Paper, Means of Aggregation and NUREG-1829: Geometric and Arithmetic Means, Rev. 3, Enclosure 2 to Attachment 1
Project stage: Other
2013-12-05
[Table View] |
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Category:E-Mail
MONTHYEARML24086A4212024-06-26026 June 2024
Email to Chris Warren Decision on the Exemption Request for South Texas Project
ML24086A4252024-06-24024 June 2024
Email to Chris Warren Availability of Environmental Assessment for the South Texas Project Exemption
ML24101A0082024-04-10010 April 2024
NRR E-mail Capture - South Texas Project - Relief Request - 50.55a(z)(2) - Rvh Penetration 75
ML24052A0152024-02-20020 February 2024
NRR E-mail Capture - South Texas Project - Request for Additional Information - Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications (L-2023-LLE-0046)
ML24052A0112024-02-16016 February 2024
NRR E-mail Capture - South Texas Project - Draft Request for Additional Information - Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications (L-2023-LLE-0046)
ML23334A0062023-11-29029 November 2023
NRR E-mail Capture - South Texas Project - Request for Additional Information - Proposed Alternative to ASME BPV Code Requirements
ML23319A4442023-11-15015 November 2023
NRR E-mail Capture - South Texas Project - Draft Request for Additional Information - Proposed Alternative to ASME BPV Code Requirements
ML23278A1532023-10-0505 October 2023
NRR E-mail Capture - South Texas Project Request for Additional Information - Request for Indirect Transfer of Licenses and Conforming Amendments (L-2023-LLM-0004)
ML23264A0972023-09-21021 September 2023
NRR E-mail Capture - South Texas Project - Request for Additional Information - License Amendment Request to Revise the Alternate Source Term Dose Calculation (L-2023-LLA-0047)
ML23255A2862023-09-12012 September 2023
NRR E-mail Capture - South Texas Project Draft Request for Additional Information License Amendment Request to Revise the Alternate Source Term Dose Calculation (L-2023-LLA-0047)
ML23191A0102023-07-0707 July 2023
NRR E-mail Capture - South Texas Project - Acceptance of Request for Indirect Transfer of Licenses and Conforming Amendments (L-2023-LLM-0004)
ML23145A1872023-05-24024 May 2023
July 2023 Emergency Preparedness Program Inspection - Request for Information
ML23124A3272023-05-0404 May 2023
NRR E-mail Capture - South Texas Project - Acceptance of License Amendment Request to Revise the Alternate Source Term Dose Calculation (L-2023-LLA-0047)
ML23115A0702023-04-24024 April 2023
NRR E-mail Capture - South Texas Project Units 1 and 2 - Audit Plan - Proposed Alternative to ASME Code, Section XI Requirements for Containment Building Inspections
ML23096A1592023-04-0606 April 2023
NRR E-mail Capture - South Texas Project - Acceptance of Requested Licensing Action - Proposed Alternative to the Requirements of the ASME Code
ML23065A0912023-03-0303 March 2023
NRR E-mail Capture - South Texas Project - Draft Supplemental Information Request - Proposed Alternative to the Requirements of the ASME Code
ML23003A8082022-11-28028 November 2022
NRR E-mail Capture - Texas Commission on Environmental Quality (TCEQ) Review/Comment Regarding the Draft Environmental Assessment for the South Texas Project Alternate Disposal Request (L-2021-LLL-0022))
ML22249A0692022-09-0606 September 2022
NRR E-mail Capture - South Texas Project - Acceptance of License Amendment Request Regarding Adoption of TSTF-554, Revise Reactor Coolant Leakage Requirements (L-2002-LLA-0113)
ML22206A0142022-07-20020 July 2022
NRR E-mail Capture - South Texas Project - Request for Additional Information - 10 CFR 20.2002 Alternate Disposal Request
ML22194A0502022-07-0707 July 2022
NRR E-mail Capture - South Texas Project - Updated Draft Request for Additional Information - 10 CFR 20.2002 Alternate Disposal Request
ML22194A0492022-06-0808 June 2022
NRR E-mail Capture - South Texas Project - Draft Request for Additional Information - 10 CFR 20.2002 Alternate Disposal Request
ML22123A3272022-05-0303 May 2022
STP EP Exercise Inspection July 2022 RFI
ML22115A2632022-04-19019 April 2022
Email Response to David Lochbaum Regarding Interim Configuration of Holtec HI-STORE FW Spent Fuel Multipurpose Canister at South Texas Project Energy Generating Station
ML22105A5642022-04-0505 April 2022
Request for Information for Problem Identification and Resolution at STP Nuclear Operating Company
ML21344A0072021-12-0909 December 2021
NRR E-mail Capture - South Texas Project - Acceptance of Requested Licensing Action - Alternative Disposal Request
ML21305B8022021-11-0101 November 2021
NRR E-mail Capture - South Texas Project - Acceptance of Requested Licensing Action - Inservice Inspection Impracticality
ML21257A2262021-09-14014 September 2021
NRR E-mail Capture - South Texas Project - Acceptance of License Amendment Request Regarding Adoption of TSTF-577, Revised Frequencies for Steam Generator Tube Inspections (L-2021-LLA-0151)
ML21160A1522021-06-0909 June 2021
Request for Information NRC Inspection 2021-003 Public Radiation Safety
ML21133A2372021-05-0505 May 2021
Request for Additional Information: STP EP Exercise Inspection - July 2021
ML21117A3242021-04-22022 April 2021
NRR E-mail Capture - (External_Sender) STP Questions About Eplan Amendment SE
ML21103A0072021-04-12012 April 2021
NRR E-mail Capture - South Texas Project - Acceptance of License Amendment Request to Add a Note to TS 3.6.3 and to Remove the TS Index (L-2021-LLA-0041)
ML21058A0002021-02-26026 February 2021
NRR E-mail Capture - South Texas Units 1 and 2 - License Amendment Request to Revise Moderator Temperature Coefficient SRs - Audit Plan and Setup of Online Document Access (L-2021-LLA-0004)
ML21049A2652021-02-16016 February 2021
NRR E-mail Capture - South Texas Project - Acceptance of License Amendment Request to Revise the Moderator Temperature Coefficient Surveillance Requirements (L-2021-LLA-0004)
ML21039A8902021-02-0808 February 2021
NRR E-mail Capture - South Texas Project - Request for Additional Information - 1RE22 Inspection Summary Report for Steam Generator Tubing
ML21029A3312021-01-29029 January 2021
NRR E-mail Capture - South Texas Project - Draft Request for Additional Information - 1RE22 Inspection Summary Report for Steam Generator Tubing
ML20244A0222020-08-28028 August 2020
NRR E-mail Capture - South Texas Project - Acceptance of License Amendment Request to Adopt TSTF-374, Revision to TS 5.5.13 and Associated TS Bases for Diesel Fuel Oil. (L-2020-LLA-0172)
ML20135H1982020-05-14014 May 2020
NRR E-mail Capture - South Texas Unit 1 - License Amendment Request to Revise Safety Injection System Accumulator Pressure - Audit Plan and Setup of Online Reference Portal
ML20125A3312020-05-0404 May 2020
NRR E-mail Capture - South Texas Project - Acceptance of License Amendment Request to Revise the Emergency Plan (L-2020-LLA-0057)
ML20111A0052020-04-17017 April 2020
NRR E-mail Capture - South Texas Project - Request for Additional Information - Proposed Alternative to ASME OM Code 2012 Edition - Relief Request PRR-01
ML20050E1192020-02-19019 February 2020
NRR E-mail Capture - South Texas Project - Acceptance of Requested Licensing Actions - Proposed Alternatives to ASME OM Code Requirements (EPID: L 2020-LLR-0007 to L-2020-LLR-0010)
ML19344A0092019-12-0909 December 2019
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ML19309F1412019-11-0404 November 2019
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ML19095A6562019-04-0404 April 2019
NRR E-mail Capture - (External_Sender) Handout for 4/10/19 Meeting to Discuss a Proposed Request for South Texas Project, Units 1 and 2, Regarding Repair of Piping Using Carbon Fiber Repair Methods
ML19081A1512019-03-21021 March 2019
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ML19078A3792019-03-19019 March 2019
NRR E-mail Capture - Acceptance Review Results: STP RR-ENG-3-23 (L-2018-LLR-0021)
ML18292A7272018-10-19019 October 2018
NRR E-mail Capture - Acceptance Review Results: TSTF-522 (L-2018-LLA-0271)
ML18283B9522018-10-10010 October 2018
NRR E-mail Capture - Final RAI - South Texas Standby DG TS Change (L-2018-LLA-0078)
2024-06-26
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1NRR-PMDAPEm Resource From:George, Andrea Sent:Tuesday, January 14, 2014 3:57 PM To:Harrison Albon; sdblossom@stpegs.com
- keeej@stpegs.com; lidyer@stpegs.com Cc
- mpmurray@stpegs.com; Singal, Balwant; Stang, J ohn; Smith, Stephen; Dozier, Jerry; Parillo, John
Subject:
RAI's Regarding South Texas Project's Submi ttal for Risk-Informed Resolution of GS-191 (TAC Nos. MF2400 and MF2401)
Attachments:GSI-191AADBRAIs.docx Good afternoon,
By letter dated June 19, 2013 (Agencywide Document s Access and Management System (ADAMS) Accession Number ML131750250), STP Nuclear Operating Company (STPNOC, the licensee) for South Texas Project (STP), Units 1 and 2, submitted a request for exemptions and license amendment request (LAR) for a risk-informed approach to resolving generic safety issue (G SI)-191. STPNOC provided a supplement to the LAR by letter dated November 13, 20 13 (ADAMS Accession No. ML13323A128). The U.S. Nuclear Regulatory
Commission (NRC) staff has reviewed the submittals and requests additional information (RAI) as detailed in the attachment.
In accordance with our procedures, a clarification call regarding these RAI's was held on January 14, 2014.
During the clarification call, South Texas Project agreed to respond to these RAIs in 60 days, which is March 15, 2014.
Please let me know of any questions; I can be reached at 301-415-1081.
Thank you,
Andrea George, Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation 301-415-1081
Hearing Identifier: NRR_PMDA Email Number: 1013 Mail Envelope Properties (Andrea.George@nrc.gov20140114155700)
Subject:
RAI's Regarding South Texas Project's Submittal for Risk-Informed Resolution of GS-191 (TAC Nos. MF2400 and MF2401) Sent Date: 1/14/2014 3:57:15 PM Received Date: 1/14/2014 3:57:00 PM From: George, Andrea Created By: Andrea.George@nrc.gov Recipients: "mpmurray@stpegs.com" <mpmurray@stpegs.com> Tracking Status: None "Singal, Balwant" <Balwant.Singal@nrc.gov> Tracking Status: None "Stang, John" <John.Stang@nrc.gov>
Tracking Status: None "Smith, Stephen" <Stephen.Smith@nrc.gov> Tracking Status: None "Dozier, Jerry" <Jerry.Dozier@nrc.gov> Tracking Status: None "Parillo, John" <John.Parillo@nrc.gov>
Tracking Status: None "Harrison Albon" <awharrison@STPEGS.COM> Tracking Status: None "sdblossom@stpegs.com" <sdblossom@stpegs.com> Tracking Status: None "keeej@stpegs.com" <keeej@stpegs.com> Tracking Status: None "lidyer@stpegs.com" <lidyer@stpegs.com>
Tracking Status: None Post Office: Files Size Date & Time MESSAGE 1165 1/14/2014 3:57:00 PM GSI-191AADBRAIs.docx 20409 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received:
Risk Informed GSI-191 Accident Dose Branch (AADB) RAI 1 To ensure a complete and accurate review of the dose consequence analyses, please provide additional information in tabular form describing, for each design basis accident affected by the proposed Risk Informed GSI-191 submittal, all the basic parameters used in the dose consequence analyses. For each parameter, please indicate the current licensing basis (CLB) value, the revised GSI-191 value where applicable, as well as the basis for any changes to the CLB. An example of the input/assumptions needed is provided in Table 4.3-11 "Dose Analysis Inputs for LOCA" provided in STP's alternate source term submittal [Agencywide Documents Access Management System (ADAMS) Accession No. ML070890474]
. The staff requests that the information provided include all of the basic parameters whether or not the individual parameter is being changed for the GSI-191 amendment. The staff also requests that the information be provided in separate tables for each affected accident (i.e., loss-of-coolant accident (LOCA), the fuel handing accident (FHA), the main steam line break accident (MSLB), the steam generator tube rupture accident (SGTR), the control rod ejection accident (CREA),
and the locked rotor accident (LRA)).
Risk Informed GSI-191 AADB RAI 2
STP identified the following condition related to the alternative source term (AST) license amendments currently in effect at STP Units 1 and 2. Westinghouse Electric Company Nuclear Safety Advisory Letter (NSAL)-06-15, dated December 13, 2006, advised operators of Westinghouse plants that the single-failure scenario for the SGTR analysis that licensees used in their accident analysis may not be limiting. As stated in the STP AST NRC Safety Evaluation dated March 6, 2008 (ADAMS Accession No. ML080160013), "The licensee has evaluated the applicability of NSAL-06-15 against the accident analysis assumptions and has determined that the current single-failure assumption for the STP SGTR analysis is not limiting. Therefore, the licensee is operating under compensatory measures to meet regulatory dose guidelines. The licensee plans to resolve this condition at the earliest opportunity so that the assumptions, including the limiting single failure, for the SGTR accident analysis described herein are consistent with the plant response to this event. To support the limiting single-failure assumptions in the SGTR analysis, STP will maintain an administrative limit for reactor coolant system (RCS) dose equivalent iodine 131 (DEI) so that the radiological dose reference values for the SGTR analysis remain bounding, and the licensee will continue to comply with GDC 19."
Has this condition been resolved? If so, how? Also, provide justification that GDC 19 continues to be met.
Risk Informed GSI-191 AADB RAI 3 The LOCA analysis assumes that iodine will be removed from the containment atmosphere by containment spray and natural diffusion to the containment walls. As a result of these removal mechanisms a large fraction of the released activity will be deposited in the containment sump.
The sump water will retain soluble gases and soluble fission products such as iodines and cesium, but not noble gases. The guidance from RG 1.183 specifies that the iodine deposited in the sump water can be assumed to remain in solution as long as the containment sump pH is
maintained at or above 7.
The AST application indicates:
"After the first day, the containment sump pH will begin to decrease, reaching 6.8 by the end of the 30-day duration of the radiological consequence analysis for the DBA LOCA, and the impact of that decrease has been reflected in the Control Room and offsite doses."
It is noted that the AST application further indicates:
"The design inputs for calculating the containment sump pool pH were conservatively established by the licensee to maximize the acidic contribution to sump pH and minimize the basic contribution."
The GSI-191 application indicates the possibility that debris generated during a LOCA could clog the containment sump strainers in pressurized-water reactors (PWRs) and result in loss of net positive suction head (NPSH) for the ECCS and CSS pumps, impeding the flow of water from the sump.
Discuss the exemption justification as they relate to the effects on sump water pH, radiological consequences, and loss of the containment spray system.
