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Category:Letter type:NOC
MONTHYEARNOC-AE-230040, Supplement to Proposed Alternate Frequency to Containment Unbonded Post-Tensioning System Inservice Inspection (Relief Request RR-ENG-4-06)2023-12-14014 December 2023 Supplement to Proposed Alternate Frequency to Containment Unbonded Post-Tensioning System Inservice Inspection (Relief Request RR-ENG-4-06) NOC-AE-230039, Docket Nos. Stn 50-498, Stn 50-499 - Reply to a Notice of Violation, NRC Inspection Report 05000498/2023003 and 05000499/20230032023-12-12012 December 2023 Docket Nos. Stn 50-498, Stn 50-499 - Reply to a Notice of Violation, NRC Inspection Report 05000498/2023003 and 05000499/2023003 NOC-AE-230039, Submittal of Update Foreign Ownership, Control or Influence (FOCI)2023-07-11011 July 2023 Submittal of Update Foreign Ownership, Control or Influence (FOCI) NOC-AE-220039, Physical Security Plan, Training and Qualification Plan, Safeguards Contingency Plan, and Independent Spent Fuel Storage Installation Security Program Revision 252023-02-0606 February 2023 Physical Security Plan, Training and Qualification Plan, Safeguards Contingency Plan, and Independent Spent Fuel Storage Installation Security Program Revision 25 NOC-AE-220038, Independent Spent Fuel Storage Installation Registration of Dry Spent Fuel Storage Cask2022-06-23023 June 2022 Independent Spent Fuel Storage Installation Registration of Dry Spent Fuel Storage Cask NOC-AE-210038, Submittal of Operations Quality Assurance Plan Changes QA-089, QA-091, and Revision 252022-01-0404 January 2022 Submittal of Operations Quality Assurance Plan Changes QA-089, QA-091, and Revision 25 NOC-AE-21003858, 10 CFR 50.46 Thirty-Day Report of Significant ECCS Model Changes2021-12-0606 December 2021 10 CFR 50.46 Thirty-Day Report of Significant ECCS Model Changes NOC-AE-21003853, Revised Response to End of Enforcement Discretion and Request for Approval of Alternate Disposal Procedures for Very Low-Level Radioactive Material2021-12-0303 December 2021 Revised Response to End of Enforcement Discretion and Request for Approval of Alternate Disposal Procedures for Very Low-Level Radioactive Material NOC-AE-21003848, Unit 1 Cycle 24 Core Operating Limits Report2021-11-18018 November 2021 Unit 1 Cycle 24 Core Operating Limits Report NOC-AE-21003846, Response to End of Enforcement Discretion and Request for Approval of Alternate Disposal Procedures for Very Low-Level Radioactive Material2021-11-0404 November 2021 Response to End of Enforcement Discretion and Request for Approval of Alternate Disposal Procedures for Very Low-Level Radioactive Material NOC-AE-21003842, 10 CFR 50.59 Summary Report2021-09-23023 September 2021 10 CFR 50.59 Summary Report NOC-AE-21003841, Request for Relief from ASME Section Xl Code Requirements for Weld Examinations (Relief Request RR-ENG-3-25)2021-09-23023 September 2021 Request for Relief from ASME Section Xl Code Requirements for Weld Examinations (Relief Request RR-ENG-3-25) NOC-AE-21003832, Supplement to License Amendment Request to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections2021-09-0909 September 2021 Supplement to License Amendment Request to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections NOC-AE-21003812, Application to Revise Technical Specifications to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections2021-08-10010 August 2021 Application to Revise Technical Specifications to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections NOC-AE-21003825, Update of Foreign Ownership, Control, or Influence Information (FOCI)2021-08-0505 August 2021 Update of Foreign Ownership, Control, or Influence Information (FOCI) NOC-AE-21003824, Update Foreign Ownership, Control, or Influence (FOCI)2021-07-29029 July 2021 Update Foreign Ownership, Control, or Influence (FOCI) NOC-AE-21003823, Update Foreign Ownership Control or Influence (FOCI)2021-07-28028 July 2021 Update Foreign Ownership Control or Influence (FOCI) NOC-AE-21003820, Nuclear Insurance Protection2021-07-20020 July 2021 Nuclear Insurance Protection NOC-AE-21003819, Inservice Inspection Summary Report - 2RE212021-07-15015 July 2021 Inservice Inspection Summary Report - 2RE21 NOC-AE-21003816, Commitment Change Summary Report2021-06-30030 June 2021 Commitment Change Summary Report NOC-AE-21003814, Technical Specification Bases Control Program2021-06-24024 June 2021 Technical Specification Bases Control Program NOC-AE-21003810, Update Foreign Ownership, Control, or Influence (FOCI)- CPS Energy2021-06-17017 June 2021 Update Foreign Ownership, Control, or Influence (FOCI)- CPS Energy NOC-AE-21003811, Update Foreign Ownership, Control, or Influence (FOCI)- Nrg Energy2021-06-17017 June 2021 Update Foreign Ownership, Control, or Influence (FOCI)- Nrg Energy NOC-AE-21003806, Inservice Inspection Program Plan and Inservice Testing Program Snubber Inservice Test Plan for the Fourth Ten-Year Interval2021-05-20020 May 2021 Inservice Inspection Program Plan and Inservice Testing Program Snubber Inservice Test Plan for the Fourth Ten-Year Interval NOC-AE-21003801, Annual Dose Report for 20202021-04-26026 April 2021 Annual Dose Report for 2020 NOC-AE-21003802, 2020 South Texas Project Electric Generating Station Annual Environmental Operating Report2021-04-26026 April 2021 2020 South Texas Project Electric Generating Station Annual Environmental Operating Report NOC-AE-21003804, Operator Licensing Examination Schedule2021-04-21021 April 2021 Operator Licensing Examination Schedule NOC-AE-21003800, Radioactive Effluent Release Report2021-04-19019 April 2021 Radioactive Effluent Release Report NOC-AE-21003799, Changes to South Texas Project Electric Generating Station (STPEGS) Emergency Plan2021-04-15015 April 2021 Changes to South Texas Project Electric Generating Station (STPEGS) Emergency Plan NOC-AE-21003795, Cycle 22 Core Operating Limits Report2021-04-15015 April 2021 Cycle 22 Core Operating Limits Report NOC-AE-21003796, Update Foreign Ownership, Control, or Influence (FOCI)2021-04-15015 April 2021 Update Foreign Ownership, Control, or Influence (FOCI) NOC-AE-21003791, Financial Assurance for Decommissioning - 2021 Update2021-03-31031 March 2021 Financial Assurance for Decommissioning - 2021 Update NOC-AE-21003790, Response to Apparent Violations in NRC Inspection Report 05000498/2020401 and 05000499/2020401: (EA-20-122) (Letter)2021-03-31031 March 2021 Response to Apparent Violations in NRC Inspection Report 05000498/2020401 and 05000499/2020401: (EA-20-122) (Letter) NOC-AE-210037, STP Fire Hazards Analysis Report, Amendment 26 (Redacted)2021-03-30030 March 2021 STP Fire Hazards Analysis Report, Amendment 26 (Redacted) NOC-AE-21003792, STP Fire Hazards Analysis Report, Amendment 26 (Redacted)2021-03-30030 March 2021 STP Fire Hazards Analysis Report, Amendment 26 (Redacted) NOC-AE-200037, License Amendment Request to Revise Technical Specification 3.6.3 to Append a Note and Remove the Index from Technical Specifications2021-03-11011 March 2021 License Amendment Request to Revise Technical Specification 3.6.3 to Append a Note and Remove the Index from Technical Specifications NOC-AE-21003784, Response to Request for Additional Information Regarding 1RE22 Inspection Summary Report for Steam Generator Tubing2021-03-0808 March 2021 Response to Request for Additional Information Regarding 1RE22 Inspection Summary Report for Steam Generator Tubing NOC-AE-21003786, Annual Fitness for Duty Performance Report for 20202021-03-0101 March 2021 Annual Fitness for Duty Performance Report for 2020 NOC-AE-21003785, Evidence of Financial Protection2021-02-23023 February 2021 Evidence of Financial Protection NOC-AE-21003781, Notice Regarding Withdrawal of Funds from Nuclear Decommissioning Trust Subaccounts2021-01-27027 January 2021 Notice Regarding Withdrawal of Funds from Nuclear Decommissioning Trust Subaccounts NOC-AE-21003780, Submittal of Update Foreign Ownership, Control, or Influence (FOCI)2021-01-0707 January 2021 Submittal of Update Foreign Ownership, Control, or Influence (FOCI) NOC-AE-20003778, Changes to South Texas Project Electric Generating Station Emergency Plan2020-12-17017 December 2020 Changes to South Texas Project Electric Generating Station Emergency Plan NOC-AE-20003777, STPNOC Concerns Regarding the Proposed Change to the Evaluated Force-on-Force Inspection Guidance During the COVID-19 Public Health Emergency2020-12-10010 December 2020 STPNOC Concerns Regarding the Proposed Change to the Evaluated Force-on-Force Inspection Guidance During the COVID-19 Public Health Emergency NOC-AE-20003766, Supplement to Change Implementation Date for License Amendment Request to Revise the STPEGS Emergency Plan2020-12-0202 December 2020 Supplement to Change Implementation Date for License Amendment Request to Revise the STPEGS Emergency Plan NOC-AE-20003767, Request for a One-Time Exemption from 10 CFR 73, Appendix 8, Section VI, Subsection C.3.(1)(1) Regarding Annual Force-on-Force (FOF) Exercises, Due to Covid 19 Pandemic2020-11-16016 November 2020 Request for a One-Time Exemption from 10 CFR 73, Appendix 8, Section VI, Subsection C.3.(1)(1) Regarding Annual Force-on-Force (FOF) Exercises, Due to Covid 19 Pandemic NOC-AE-20003765, Inservice Testing Program Description for the Fourth Ten-Year Interval2020-10-28028 October 2020 Inservice Testing Program Description for the Fourth Ten-Year Interval NOC-AE-20003764, 1 RE22 Inspection Summary Report for Steam Generator Tubing2020-10-0707 October 2020 1 RE22 Inspection Summary Report for Steam Generator Tubing NOC-AE-20003762, Supplement to License Amendment Request to Revise Technical Specifications to Adopt TSTF-374, Revision 0, Revision to TS 5.5.13 and Associated TS Bases for Diesel Fuel Oil Using the Consolidated Line Item Improvemen2020-09-22022 September 2020 Supplement to License Amendment Request to Revise Technical Specifications to Adopt TSTF-374, Revision 0, Revision to TS 5.5.13 and Associated TS Bases for Diesel Fuel Oil Using the Consolidated Line Item Improvemen NOC-AE-20003761, Supplement to Exemption Request from 10 CFR 50 Appendix E Due to COVID-19 Pandemic2020-09-10010 September 2020 Supplement to Exemption Request from 10 CFR 50 Appendix E Due to COVID-19 Pandemic NOC-AE-20003760, Update Foreign Ownership. Control. or Influence(FOCI)- Transmittal2020-09-0808 September 2020 Update Foreign Ownership. Control. or Influence(FOCI)- Transmittal 2023-07-11
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Nuclear Operating Company South Texas Project Electric GeneratinS Station P0. Box 289 Wadsworth. Texas 77483 AAAA February 14, 2008 NOC-AE-08002263 10CFR50.55a U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852 South Texas Project Unit 1 Docket No. STN 50-498 Relief Request RR-ENG-2-30, Rev. 3
Reference:
Letter, Robert A. Gramm, NRC, to James J. Sheppard, STPNOC, dated June 27, 2003, "SOUTH TEXAS PROJECT, UNIT 1 - Request For Relief, RR-ENG-2-30, Revision 2, From American Society Of Mechanical Engineers Boiler And Pressure Vessel Code (ASME Code) Requirements For Approval Of ASME Section XI Code Case N-516-2 For Underwater Welding Of Core Barrel Locking Tab (TAC No. MB8925, ML031780907)
The referenced letter approved a relief request submitted by STP Nuclear Operating Company (STPNOC) in 2003 for use of Code Case N-516-2 on the reactor vessel core barrel and its Roto-Lock insert tabs. STPNOC requests approval of the attached relief request for essentially identical underwater welding on the same insert during the Unit 1 Spring 2008 outage (1RE 14).
STPNOC plans to replace the existing Roto-Lock insert with a Roto-Lock insert with a flow blocking plate welded in the bottom of the insert. The replacement is performed by a diver underwater and requires removing the insert locking tab for which relief was approved in 2003 and welding a new tab using the same process and material types approved in 2003. The tab removal and replacement is not due to failure or deficiency in the welding performed in 2003.
There are no commitments in this letter.
?40Y7 STI: 32265298
NOC-AE-08002263 Page 2 of 3 NRC approval is requested by April 11, 2008 to support the 1RE 14 schedule.
If there are any questions regarding this correction, please contact Wayne Harrison at (361) 972-7298 or me at (361) 972-7431.
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Attachment:
10CFR50.55a Relief Request RR-ENG-2-30, Rev. 3
NOC-AE-08002263 Page 3 of 3 cc:
(paper copy) (electronic copy)
Regional Administrator, Region IV A. H. Gutterman, Esquire U. S. Nuclear Regulatory Commission Morgan, Lewis & Bockius LLP 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Mohan C. Thadani U. S. Nuclear Regulatory Commission Mohan C. Thadani Thad Hill Senior Project Manager Eddy Daniels U.S. Nuclear Regulatory Commission Marty Ryan One White Flint North (MS 7 DI) Robert Bailey 11555 Rockville Pike Steve Winn Rockville, MD 20852 NRG South Texas LP Senior Resident Inspector Ed Alarcon U. S. Nuclear Regulatory Commission J. J. Nesrsta P. O. Box 289, Mail Code: MN116 R. K. Temple Wadsworth, TX 77483 Kevin Pollo City Public Service C. M. Canady Jon C. Wood City of Austin Cox Smith Matthews Electric Utility Department 721 Barton Springs Road C. Kirksey Austin, TX 78704 City of Austin Richard A. Ratliff Bureau of Radiation Control Texas Department of State Health Services 1100 West 49th Street Austin, TX 78756-3189
NOC-AE-08002263 Attachment Page 1 of 6 10CFR50.55a Relief Request RR-ENG-2-30, Rev. 3 Proposed Alternative in Accordance with 10 CFR 50.55a(a)(3)(i)
--Alternative Provides Acceptable Level of Quality and Safety--
ASME Code Components Affected Unit 1 reactor vessel core barrel and its Roto-Lock insert locking tabs that secure the inserts and prevent their rotation.
2. Applicable Code Edition and Addenda
American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, 1989 Edition with no Addenda.
3. Applicable Code Requirement
IWA-4000 of Section XI does not address underwater welding. However, Code Case N-516-3, "Underwater Welding,Section XI, Division 1," includes alternative procedure, performance, and filler metal qualifications, and alternative examination requirements to those contained or referenced in IWA-4000 for use when the welding is performed underwater.
- 4. Reason for the Request STPNOC plans to replace an existing Roto-Lock insert with a new Roto-Lock insert with a flow blocking plate welded in the bottom of the insert. The replacement is performed by a diver underwater and requires removing the insert locking tab for which relief was approved in 2003 and welding a new tab using the same process and material types approved in 2003. The tab removal and replacement is not due to failure or deficiency in the welding performed in 2003.
In the description of Code Case N-516-3, Regulatory Guide (RG) 1.147 Rev. 15 states that NRC approval is required for the technique to be used in the weld repair or replacement of irradiated material underwater.
Consequently, STPNOC requests approval for the use of Code Case N-516-3 for underwater fillet welding of a Roto-Lock insert locking tab to the reactor vessel core barrel to secure the insert and prevent its rotation.
NOC-AE-08002263 Attachment Page 2 of 6
- 5. Proposed Alternative and Basis for Use STPNOC requests relief from the requirements of IWA-4000 in accordance with 10CFR50.55a(a)(3)(i) in order to perform underwater welding for repairs. IWA-4000 of the Section XI code of record at the South Texas Project does not address underwater welding. STPNOC requests NRC approval of ASME Section XI Code Case N-516-3 for use at STP on the basis that it provides an acceptable level of quality and safety.
STPNOC's relief request approved in 2003 cited Code Case N-516-2. This submittal cites Code Case N-516-3. The NRC documented their acceptance of Code Case N-516-3 in RG 1..147, Revision 15, dated October, 2007. Code Case N-516-3 added another welding process that is not relevant to this relief request. The description below is based on the relief request approved in 2003, with STPNOC's responses to the NRC's requests for additional information incorporated into the text.
STPNOC requests approval for use of Code Case N-516-3 in order to deposit three 0.180-inch fillet welds on one locking device. This specific application is for wet welding to make three underwater fillet welds to attach one Roto-Lock insert locking tab to the core barrel to secure the Roto-Lock insert and prevent its rotation. The subject fillet welds are to prevent the Roto-Lock insert from backing out and potentially becoming a loose part.
They are not structural or pressure boundary welds. The requirements imposed on the welds are conservative with respect to the safety function of the welds.
The locking tab is A-240 Tp 304L. The core barrel is SA-182 F304H. The filler metal is SFA 5.4 E316L-17. The shielded metal arc welding (SMAW) process will be used.
Cutting is expected to be done with a rotary file.
These welds will be made using a weld procedure specification (WPS) qualified in accordance with Code Case N-516-3. Examination will be remote visual by a certified inspector. No on-going examination is required or planned. The WPS was qualified with tensile and bend tests in accordance with ASME Section IX, with an additional chemical; ferrite, and tensile test performed in accordance with Code Case N-516-3. ASME Section IX guided bend tests per QW- 160 have been performed.
The Procedure Qualification Records for the tensile test and the filler material weld pad were performed at a depth of 35 feet. This qualifies the welding procedure and the filler material to a depth range of from 2 to 45 feet. The replacement weld is expected to be performed at a depth of 29 feet. The tests performed meet the qualification requirements of Code Case N-516-3 for welding at a depth of 29 feet.
A confirmation weld will be performed on 1/2-inch plate using the WPS and the same weld material as that to be used in the production weld. The confirmation weld will be subject to the same inspection requirement as the production weld.
NOC-AE-08002263 Attachment Page 3 of 6 STPNOC determined that the procedure qualification requirements of the code case have been met. The results are summarized below.
Procedure qualification results are as follows:
- 2 root and 2 face bends - acceptable
- 2 tensile tests - acceptable
- Chemistry test results certified that the weld pad was welded with a 3/32" diameter E316L-17 electrode of Lot 550P. The weld pad was welded at a water depth of 35 feet. Chemistry conforms to the chemical requirements of ASME SFA 5.4, AWS Classification E316L-XX.
- Carbon .0.032
- Chromium 17.83
- Nickel 12.02
- Molybdenum 2.35
- Manganese 0.63
- Silicon 0.61
- Phosphorus 0.023
- Sulfur 0.013
- Copper 0.07
- Cobalt 0.29 Six delta-ferrite readings were taken on the weld pad and resulted in an average of 6.5FN.
This complies with site requirements for a minimum of 5FN and a maximum of 25FN.
The six readings were 7.0, 6.5, 7.0, 6.5, 5.5 and 6.5.
The total neutron fluence at the vessel flange area is expected to be no higher than 1.2E+17 n/cm 2 after 40 calendar years of plant operation. As discussed in the 2003 application, the mockup material will not have the same fluence level applied to it. The application is notClass 1 and is non-structural and non-pressure retaining. Additionally, the locking tab and core barrel are not ferritic materials and, therefore, not subject to neutron embrittlement.
These additional requirements, combined with the alternative requirements of Code Case N-516-3, provide an acceptable level of quality and safety for underwater welding.
- 6. Duration of Proposed Alternative This relief request will be implemented during the Unit 1 spring 2008 :refueling outage.
NOC-AE-08002263 Attachment Page 4 of 6 Location of Weld 5
NOC-AE-08002263 Attachment Page 5 of 6 165.9I8DIA I HOLD DOWN S1PRING-FULL $IZE.
NOC-AE-08002263 Attachment Page 6 of 6 15° I NT ERN ALS)
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