Letter Sequence Acceptance Review |
|---|
TAC:MF0613, (Open) TAC:MF0614, (Open) 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) |
Results
Other: ML13098A396, ML13098A431, ML13098A511, ML13175A211, ML13295A222, ML13323A183, ML13323A186, ML13323A189, ML13323A190, ML13323A191, ML13338A165, 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)
|
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
ML13066A5192013-04-0101 April 2013
Supplemental Information Needed for Acceptance of Requested Licensing Action Request for Exemption for a Risk-Informed Approach to Resolve Generic Safety Issue 191
Project stage: Acceptance Review
ML13098A5112013-04-0808 April 2013
Corrosion/Head Loss Experiment Program
Project stage: Other
ML13098A4312013-04-0808 April 2013
Development of Chemical Effects Modules for Risk-Informed GSI-191 Resolution
Project stage: Other
ML13098A3962013-04-0808 April 2013
Email Risk Informed GSI-191 Evaluation
Project stage: Other
ML13101A3142013-04-12012 April 2013
Notice of Meeting Via Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed Approach to Resolve Generic Safety Issue 191 for South Texas, Units 1 and 2
Project stage: Meeting
NOC-AE-13002994, Schedule for Supplement to STP Pilot Submittal and Request for Exemption for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-1912013-04-17017 April 2013
Schedule for Supplement to STP Pilot Submittal and Request for Exemption for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191
Project stage: Supplement
ML13114A2552013-04-17017 April 2013
Schedule for Supplement to STP Pilot Submittal and Request for Exemption for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191
Project stage: Supplement
ML13112A2522013-04-25025 April 2013
Approval of Extension to Submit Supplemental Information for Acceptance of Licensing Action; Request for Exemption for a Risk-Informed Approach to Resolve Generic Safety Issue 191
Project stage: Acceptance Review
ML13119A0802013-04-30030 April 2013
Notice Meeting Via Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed Approach to Resolve Generic Safety Issue 191 for South Texas, Units 1 and 2
Project stage: Meeting
ML13140A2692013-05-20020 May 2013
NRC Slides for 5/23/13 Meeting Regarding Risk - Informed GSI-191 Pilot Application Initial Review Insights
Project stage: Meeting
ML13140A2562013-05-20020 May 2013
Licensee Slides for 5/23/13 Meeting - STP Pilot Submittal for Risk Informed Approach to Resolving GSI-191
Project stage: Meeting
ML13150A2162013-05-23023 May 2013
Licensee Slides for 5/23/13 Public Meeting Regarding GSI-191
Project stage: Meeting
ML13161A1632013-06-14014 June 2013
5/23/13 Summary of Public Meeting Via Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed Approach to Resolve Generic Safety Issue 191 for South Texas, Units 1 and 2
Project stage: Meeting
ML13175A2112013-06-19019 June 2013
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
ML13168A1622013-06-26026 June 2013
Summary of Meeting Via Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed Approach to Resolve Generic Safety Issue 191 for South Texas, Units 1 and 2
Project stage: Meeting
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
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
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
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
ML13323A1852013-11-13013 November 2013
Enclosure 3 - License Amendment Request for STP Piloted Risk-Informed Approach to Closure for GSI-191
Project stage: Request
ML13316B9052013-11-13013 November 2013
Albrz Testing Update for NRR Final
Project stage: Request
ML13323A1922013-11-13013 November 2013
Enclosure 5 - Response to NRC Supplemental Information Items
Project stage: Supplement
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
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
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
ML13330B7152013-11-26026 November 2013
RAI from the Mechanical & Civil Engineering Branch Re. Revise STP Submittal and Request for Exemptions and License Amendment for a Risk-information Approach to Resolving Generic Safety Issues (GSI)-191
Project stage: RAI
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
ML14015A3112013-12-23023 December 2013
Response to NRC Request for Reference Document for STP Risk-Informed GSI-191 Application
Project stage: Request
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
2013-11-26
[Table View] |
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)| ML13214A031 |
| Person / Time |
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| Site: |
South Texas  |
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| Issue date: |
08/13/2013 |
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| From: |
Balwant Singal
Plant Licensing Branch IV |
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| To: |
Koehl D
South Texas |
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| Singal B |
| References |
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| TAC MF0613, TAC MF0614, TAC MF2400, TAC MF2401, TAC MF2402, TAC MF2403, TAC MF2404, TAC MF2405, TAC MF2406, TAC MF2407, TAC MF2408, TAC MF2409 |
| Download: ML13214A031 (4) |
|
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 13, 2013 Mr. Dennis L. Koehl President and CEO/CNO STP Nuclear Operating Company South Texas Project P.O. Box 289 VVadsworth,TX 77483
SUBJECT:
SOUTH TEXAS PROJECT, UNITS 1 AND 2 -ACCEPTANCE OF REQUESTS FOR EXEMPTIONS AND LICENSE AMENDMENT REQUEST FOR APPROVAL OF A RISK-INFORMED APPROACH TO RESOLVE GENERIC SAFETY ISSUE GSI-191 (TAC NOS. MF0613, MF0614, MF2400, MF2401, MF2402, MF2403, MF2404, MF2405, MF2406, MF2407, MF2408, AND MF2409)
Dear Mr. Koehl:
By letter dated January 31, 2013 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML13043A013), STP Nuclear Operating Company (STPNOC, the licensee) submitted an exemption request for a risk-informed approach 'to resolve Generic Safety Issue (GSI)-191 for South Texas Project (STP), Units 1 and 2. The request was assigned Technical Assignment Control (TAC) Nos. MF0613 and MF0614. The U.S. Nuclear Regulatory Commission (NRC) staff requested supplemental information by letter dated April 1, 2013 (ADAMS Accession No. ML13066A519). The licensee provided the requested information by letter dated June 19,2013 (ADAMS Accession No. ML131750250). The licensee's letter dated June 19, 2013, included a license amendment request, in addition to four exemption requests. The licensee stated that the revised submittal supersedes the previous submittal dated January 31, 2013, in its entirety. Hence, the NRC staff considers the original request as withdrawn and has closed TAC Nos. MF0613 and MF0614. The request dated June 19, 2013, has been assigned new set of TAC numbers for the exemption requests and the license amendment request.
The purpose of this letter is to provide the results of the NRC staff's acceptance review of the exemption requests and the amendment request. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to complete its detailed technical review. The acceptance review is also intended to identify whether the application has any readily apparent information insufficiencies that may impact the NRC staff's ability to complete the detailed technical review.
Consistent with Section 50.12 of Title 10 of the Code of Federal Regulations (10 CFR), the licensee may request and the NRC staff may grant exemptions from the requirements of 10 CFR 50, which are authorized by law, will not present undue risk to the public health and safety, is consistent with the common defense and security, and when special circumstances are present.
D. Koehl
- 2 Also, consistent with 10 CFR 50.90, an amendment to the license (including the technical specifications) must fully describe the changes requested, and following as far as applicable, the form prescribed for original applications. Section 50.34 of 10 CFR addresses the content of technical information required. This section stipulates that the submittal address the design and operating characteristics, unusual or novel design features, and principal safety considerations.
The NRC staff has reviewed the information provided in the licensee's letter dated June 19, 2013, and concludes that for the following areas, the application does not provide technical information in sufficient detail to enable the NRC staff to complete its detailed technical review and make an independent assessment regarding the acceptability of the proposed exemptions and the amendment request in terms of regulatory requirements.
Key assumptions, input parameters, and modeling details for the reactor coolant system thermal hydraulic analysis in response to in-core debris plugging.
Technical basis for the strainer head loss evaluation.
The licensee cited "engineering judgment" in several technical areas with little or no justification or sensitivity studies in support of the engineering judgments.
The risk-informed approach to chemical effects described by the licensee involves the use of a "bump-up" factor (multiplier) applied to conventional head loss (non-chemical debris) across the sump strainer, but does not provide sufficient technical basis for the multiplier used and its distribution. Additional testing may be needed to justify the methodology described in the application.
Details of the containment Net Positive Suction Head (NPSH) analysis, including assumptions and input parameters, and containment accident pressure credited for providing the NPSH for the emergency core cooling and containment heat removal systems.
The risk-informed approach for resolution of GSI-191 for STP, Units 1 and 2, is proposed to support closure of Generic Letter 2004-02, "Potential Impact of Debris Blockage on Emergency Recirculation during DeSign Basis Accidents at Pressurized-Water Reactors," dated September 13, 2004 (ADAMS Accession No. ML042360586). The use of risk-informed approach to resolution of GSI-191, is described in SECY-12-0093, "Closure Options for Generic Safety Issue - 191, Assessment of Debris Accumulation on Pressurized-Water Reactor Sump Performance," dated July 9,2012 (ADAMS Accession No. ML121320270). STP is the pilot plant and a number of licensees intend to use the methodology developed by STP, if accepted by the NRC staff. The risk-informed approach developed by STPNOC is first-of-a-kind review and resolution of GSI-191 issues is in the interest of public health, safety, and security. The NRC staff is still developing the guidance on acceptable methods and level of detail needed for review of such applications. Therefore, the NRC staff has decided to invoke Section 1.3.4, "Rare Circumstances," of LlC-109, Revision 1, "Acceptance Review Procedures," dated July 16, 2009 (ADAMS Accession No. ML091810088), and accept the application for review. The NRC staff will request any further information needed to support the NRC staff's detailed technical review by separate correspondence. In addition, the NRC staff may conduct on-site audits to review the information not submitted on docket previously and conduct public meetings to resolve open
D. Koehl
- 3 issues for the benefit of the other licensees intending to use the risk-informed approach for resolution to GSI-191.
If the technical information identified above is not provided in a reasonable amount of time, the NRC staff may decide to terminate the review. In such as case, the licensee will be expected to resolve GSI-191 concerns by use of a deterministic approach.
If you have any questions, please contact me at (301) 415-3016 or via e-mail at balwant.singal@nrc.gov.
Sincerely, bc&...--t-~,~~
Balwant K. Singal, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499 cc: Distribution via Listserv
ML13214A031 Sincerely, Ira!
Balwant K. Singal, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor licenSing Office of Nuclear Reactor Regulation RidsNrrPMSouthTexas Resource RidsOgcRp Resource RidsRgn4MailCenter Resource SSmith, NRRlDSS/SSIB EGeiger, NRR/DSS/SSIB GWaig, NRRlDSS/STSB AGuzzetta, NRRlDSS/SRXB ASaliman, NRRlDSS/SCVB CFong, NRRlDRAlAPLA JDozier, NRR/DRAlAADB JRikhoff, NRR/DLRlRERB PKlein, NRR/DE/ESGB MYoder, NRR/DE/ESGB
- Concurrence via e-mail i OFFICE NRRlDORLlLPL4/PM NRRlDORLlLPL4/LA NRRlDSSISSIBlBC NRRlDSS/SCVB/BC NRRlDSS/SRXBlBC mt BSingal JBurkhardt SBailey*
BHeida(A)*
CJackson*
8/5113 NRRlDSS/STSBlBC 8/2/13 NRRlDRAlAPLNBC 811/13 NRRlDRAlAADB/BC 812/13 NRRlDE/ESGB/BC NR NRRlDLRlRERBlBC NAME RElliott*
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DATE 8/2/13 7/31/13 8/1113 8/1/13 8/1/13 OFFICE Steering Committee NRRlDORLlLPL4IBC NRRlDORLlLPL4/PM NAME JDavis MMarkley BSingal DATE 8113/13 8/8/13 8113/13