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| | number = ML090080487 | | | number = ML090080487 |
| | issue date = 12/31/2008 | | | issue date = 12/31/2008 |
| | title = South Texas Project, Unit 2 - E-mail #2, Licensee'S Response to Request for Additional Information, Exigent License Amendment Request, Revise Technical Specification 3.7.1.7, Main Feedwater System, to Allow One-Time Allowed Outage Time | | | title = Project, Unit 2 - E-mail #2, Licensee'S Response to Request for Additional Information, Exigent License Amendment Request, Revise Technical Specification 3.7.1.7, Main Feedwater System, to Allow One-Time Allowed Outage Time |
| | author name = Taplett K | | | author name = Taplett K |
| | author affiliation = South Texas Project Nuclear Operating Co | | | author affiliation = South Texas Project Nuclear Operating Co |
Revision as of 06:07, 17 April 2019
Letter Sequence Response to RAI |
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MONTHYEARNOC-AE-08002378, License Amendment Request for Proposed One-time Exigent Change to Technical Specification 3.7.1.7, Main Feedwater System.2008-12-19019 December 2008 License Amendment Request for Proposed One-time Exigent Change to Technical Specification 3.7.1.7, Main Feedwater System. Project stage: Request ML0835704862008-12-23023 December 2008 Individual Notice of Consideration of Issuance of Amendment, 14-day Exigent Circumstances, Revise TS 3.7.1.7, Main Feedwater System, to Allow One-Time Allowed Outage Time Project stage: Other ML0835704642008-12-23023 December 2008 Letter, Individual Notice of Consideration of Issuance of Amendment, 14-day Exigent Circumstances, Revise TS 3.7.1.7, Main Feedwater System, to Allow One-Time Allowed Outage Time Project stage: Other ML0835902212008-12-24024 December 2008 Acceptance Review E-Mail, One-Time Exigent Change, Extension to Allowed Outage Time for Technical Specification 3.7.1.7, Main Feedwater System Project stage: Acceptance Review ML0900805122008-12-31031 December 2008 E-mail #1, Licensee'S Response to Request for Additional Information, Exigent License Amendment Request, Revise Technical Specification 3.7.1.7, Main Feedwater System, to Allow One-Time Allowed Outage Time (TAC No. ME0271 Project stage: Response to RAI ML0900804872008-12-31031 December 2008 E-mail #2, Licensee'S Response to Request for Additional Information, Exigent License Amendment Request, Revise Technical Specification 3.7.1.7, Main Feedwater System, to Allow One-Time Allowed Outage Time Project stage: Response to RAI NOC-AE-09002379, Response to Request for Additional Information Regarding a Proposed One-Time Exigent Change to Technical Specification 3.7.1.7, Main Feedwater System2009-01-0707 January 2009 Response to Request for Additional Information Regarding a Proposed One-Time Exigent Change to Technical Specification 3.7.1.7, Main Feedwater System Project stage: Response to RAI ML0900706922009-01-16016 January 2009 Issuance of Exigent Amendment No. 176, Revise Technical Specification 3.7.1.7, Main Feedwater System, to Allow One-Time Allowed Outage Time Project stage: Approval 2008-12-24
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Category:E-Mail
MONTHYEARML23334A0062023-11-29029 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 NRR E-mail Capture - South Texas Project - Acceptance of Requested Licensing Action - Proposed Alternative to ASME Code Requirements for the Repair of Essential Cooling Water System Class 3 Buried Piping ML19309F1412019-11-0404 November 2019 Supplemental Information Request - Proposed Alternative to ASME Code Requirements for the Repair of Essential Cooling Water System Class 3 Buried Piping (EPID L 2019-LLR-0096) (Draft) ML19291A0332019-10-17017 October 2019 NRR E-mail Capture - Acceptance Review Results: STP License Amendment Request Regarding Request to Delete E Bar Definition ML19165A1032019-06-14014 June 2019 NRR E-mail Capture - Draft RAI for STP TS 3.8.1.1 Sbdg SR Change ML19162A1162019-05-22022 May 2019 NRR E-mail Capture - Acceptance Review Results: STP License Amendment Request Regarding TSTF-529 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 NRR E-mail Capture - Draft Round 2 RAI - Sbdg Voltage and Frequency LAR (L-2018-LLA-0078) 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) ML18263A1432018-09-12012 September 2018 NRR E-mail Capture - Final RAI for South Texas Project RR-ENG-E-16 (L-2018-LLR-0097) ML18190A5002018-07-0909 July 2018 NRR E-mail Capture - Acceptance Review Results - South Texas Unit 1 Relief Request - Relief Request RR-ENG-3-16 (L-2018-LLR-0097) ML18121A0322018-04-30030 April 2018 NRR E-mail Capture - Acceptance Review Results - South Texas Project Technical Specification Change for Standby Diesel Generator Surveillance Requirements Acceptance Criteria (L-2018-LLA-0078) ML18060A3062018-03-0101 March 2018 NRR E-mail Capture - Acceptance Review Results for South Texas Project Relief Request to Extend the Timeframe for Volumetric Exams of B-A and B-D Reactor Vessel Welds (L-2018-LLR-0010) ML18016A1542018-01-16016 January 2018 NRR E-mail Capture - Acceptance Review Results - South Texas Project Relief Request to Use Ultrasonic Examination Techniques in Lieu of Radiography (L-2017-LLR-0154) 2023-09-21
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Text
From: Taplett, Kenneth [kjtaplett@STPEGS.COM] Sent: Wednesday, December 31, 2008 4:55 PM To: Mohan Thadani Cc: Bruce Heida; Stanley Gardocki; Harrison, Albon
Subject:
RE: TWO MORE Qs FOR EXIGENT AMENDMENT Mohan, The STP reply is below. This should address both questions.
Ken "The accident analysis, discussed in UFSAR Section 6.2, credits feedwater isolation within 13 seconds of feedwater isolation signal initiation to limit the maximum containment pressure for a main steamline break in containment. The feedwater control valves receive a feedwater isolation signal and are designed to close in sufficient time to meet the 13 seconds assumed in the accident analysis. The closure time of the feedwater control valves are verified every refueling cycle by plant surveillance procedures. Therefore, the feedwater control valves function as a backup feature to limit the maximum containment pressure for a main steamline break in containment.
The accident analysis discussed in UFSAR Section 6.2 does not credit the stopping of the steam generator feedwater pumps."
From: Mohan Thadani [1] Sent: Wednesday, December 31, 2008 12:44 PM To: Taplett, Kenneth Cc: Bruce Heida; Stanley Gardocki
Subject:
TWO MORE Qs FOR EXIGENT AMENDMENT Ken:
Reviewer's two additional questions follow:
STP-2 relies upon stopping the SG Feedwater Pump and the feedwater control valve as compensatory action for a failure of the feedwater isolation valve. The accident analysis indicates the feedwater isolation valve is required to close in 13 seconds to limit the maximum containment pressure for a main steamline break in containment.
We cannot determine from the UFSAR whether the stopping time for the SG feedwater pumps and the closing of the feedwater control valve is within the 13 seconds assumed in the accident analysis. If they are not, we cannot find any reference to a containment pressure accident analysis for a main steamline break in containment with feedwater isolation times based on the control valve and feedwater pump closing and stopping times. We would expect the analysis has already have been performed as part of their single failure analysis.
Two questions:
- 1) Is the isolation of feedwater to the steam generators using the stopping of the steam generator feedwater pumps and the closing of the feedwater control valves within the 13 second closing time assumed for the feedwater isolation valve as used in the accident analysis discussed in UFSAR Section 6.2?
- 2) If the isolation of feedwater to the steam generators by the stopping of the steam generator feedwater pumps and the closing of the feedwater control valves is greater than the 13 second closing time assumed for the feedwater isolation valve, what is the peak containment pressure for a main steamline break in containment?
Note: the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> AOT for containment isolation valves as listed in the WOG standard technical specifications appears to be based on minimizing radiological leakage from containment. We haven't found any discussion in the bases on restricting feedwater inventory to the steam generators during a main steamline break in containment to limit maximum containment
pressures.
E-mail Properties Mail Envelope Properties (582CA7E05607F14F8D433C5CE43C030A1BC8C0AF)
Subject:
RE: TWO MORE Qs FOR EXIGENT AMENDMENT
Sent Date: 12/31/2008 4:55:05 PM Received Date: 12/31/2008 4:55:05 PM From: Taplett, Kenneth
Created By: kjtaplett@STPEGS.COM
Recipients:
Mohan.Thadani@nrc.gov (Mohan Thadani)
Tracking Status: None Bruce.Heida@nrc.gov (Bruce Heida)
Tracking Status: None Stanley.Gardocki@nrc.gov (Stanley Gardocki)
Tracking Status: None awharrison@STPEGS.COM (Harrison, Albon)
Tracking Status: None
Post Office:
exgmb2.CORP.STPEGS.NET
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MESSAGE 12108 12/31/2008
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