License Renewal (LR) and Subsequent License Renewal (SLR) Interim Staff Guidance (ISG)

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• SLR-ISG Topics
• LR-ISG Topics 2011-2016
• Previous LR-ISG Topics

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SLR-ISG Topics

Number	Topic	Status	Comments
SLR-ISG-2021-01-PWRVI	Updated Aging Management Criteria for Reactor Vessel Internal Components of Pressurized Water Reactors of Subsequent License Renewal Guidance	Final	A notice of availability for the draft ISG was published in the Federal Register on August 3, 2020 (85 FR 46735). The public comment period ended on September 2, 2020. A notice of availability for the final ISG was published in the Federal Register on January 19, 2021 (86 FR 5266).
SLR-ISG-2021-02-MECHANICAL	Updated Aging Management Criteria for Mechanical Portions of Subsequent License Renewal Guidance	Final	A notice of availability for this draft ISG was published in the Federal Register on July 2, 2020 (85 FR 39938). The public comment period ended on August 10, 2020. A notice of availability for the final ISG was published in the Federal Register on February 25, 2021 (86 FR 11564).
Errata for SLR-ISG-MECHANICAL-2020-XX  (addressed in SLR-ISG-2021-02-MECHANICAL)	Errata for Updated Aging Management Criteria for Mechanical Portions of Subsequent License Renewal Guidance	Final	A notice of availability for this errata was published in the Federal Register on July 31, 2020 (85 FR 46192). The public comment period for the first three ISGs shown in this table was extended to August 10, 2020, to accommodate review of the errata. A notice of availability for the final ISG was published in the Federal Register on February 25, 2021 (86 FR 11564).
SLR-ISG-2021-03-STRUCTURES	Updated Aging Management Criteria for Structures Portions of Subsequent License Renewal Guidance	Final	A notice of availability for the draft ISG was published in the Federal Register on July 2, 2020 (85 FR 39938). The public comment period ended on August 10, 2020. A notice of availability for the final ISG was published in the Federal Register on February 25, 2021 (86 FR 11564).
SLR-ISG-2021-04-ELECTRICAL	Updated Aging Management Criteria for Electrical Portions of Subsequent License Renewal Guidance	Final	A notice of availability for the draft ISG was published in the Federal Register on July 2, 2020 (85 FR 39938). The public comment period ended on August 10, 2020. A notice of availability for the final ISG was published in the Federal Register on February 25, 2021 (86 FR 11564).

LR-ISG Topics 2011-2016

Number	Topic	Status	Comments
LR-ISG-2011-01	Aging Management of Stainless Steel Structures and Components in Treated Borated Water, Revision 1	Final	A notice of availability of the Final LR-ISG-2011-01 was published in the Federal Register on December 18, 2012 (77 FN 74883). This final LR-ISG clarifies the staff's existing position on Aging Management in Treated Borated Water.
LR-ISG-2011-02	Aging Management Program for Steam Generators	Final	A notice of availability of the Final LR-ISG-2011-02 was published in the Federal Register on December 1, 2011 (76 FR 74834). The guidance evaluates the suitability of using Rev. 3 of NEI 97-06 for implementing their steam generator aging management program.
LR-ISG-2011-03	Generic Aging Lessons Learned (GALL) Report Revision 2 AMP XI.M41, "Buried and Underground Piping and Tanks"	Final	A notice of availability for the Final LR-ISG-2011-03 was published in the Federal Register on August 2, 2012 (77 FR 46127). This final LR-ISG gives additional guidance on buried and underground piping and tanks. Note: LR-ISG-2011-03 has been replaced by LR-ISG-2015-01.
LR-ISG-2011-04	Updated Aging Management Criteria for Reactor Vessel Internal Components of Pressurized Water Reactors	Final	A notice of availability of the Final LR-ISG-2011-04 was published in the Federal Register on June 3, 2013 (78 FR 33120). LR-ISG-2011-04 was superseded by SLR-ISG-2021-01-PWRVI on January 19, 2021.
LR-ISG-2011-05	Ongoing Review of Operating Experience	Final	A notice of availability of the Final LR-ISG-2011-05 was published in the Federal Register on March 16, 2012 (77 FR 15818). This final LR-ISG clarifies the staff's existing position on the ongoing review of both plant-specific and industry operating experience.
LR-ISG-2012-01	Wall Thinning Due to Erosion Mechanisms	Final	A notice of availability of the Final LR-ISG-2012-01 was published in the Federal Register on May 1, 2013 (78 FN 25487). This final LR-ISG gives additional guidance on aging management for wall thinning due to erosion mechanisms.
LR-ISG-2012-02	Aging Management of Internal Surfaces, Fire Water Systems, Atmospheric Storage Tanks, and Corrosion Under Insulation	Final	A notice of availability of the Final LR-ISG-2012-02 was published in the Federal Register on Nov. 22, 2013 (78 FN 226). This final LR-ISG gives guidance on aging management for internal surfaces, fire water system, atmospheric storage tanks, and corrosion under insulation.
LR-ISG-2013-01	Aging Management of Loss of Coating or Lining Integrity for Internal Coatings/Linings on In-Scope Piping, Piping Components, Heat Exchangers, and Tanks	Final	A notice of availability of the Final LR-ISG-2013-01 was published in the Federal Register on Nov. 14, 2014 (79 FN 220).
LR-ISG-2015-01	Changes to Buried and Underground Piping and Tank Recommendations	Final	A notice of availability of the LR-ISG-2015-01 was published in the Federal Register on February 4, 2016 (81 FR 23). This LR-ISG will replace aging management program (AMP) XI.M41, "Buried and Underground Piping and Tanks," and its associated Updated Final Safety Analysis Report (UFSAR) Summary Description in LR–ISG–2011–03, "Changes to the Generic Aging Lessons Learned (GALL) Report Revision 2 Aging Management Program (AMP) XI.M41, 'Buried and Underground Piping and Tanks'."
LR-ISG-2016-01	Changes to Aging Management Guidance for Various Steam Generator Components	Final	A notice of availability of the LR-ISG-2016-01 was published in the Federal Register on December 07, 2016 (81 FR 88276). This LR-ISG describes changes to aging management program (AMP) XI.M19 "Steam Generator," and the aging management review (AMR) items for steam generator components in NUREG-1801 "Generic Aging Lessons Learned (GALL) Report," Revision 2, and NUREG-1800 “Standard Review Plan for Review of License Renewal Applications for Nuclear Power Plants" (SRP-LR), Revision 2.

Previous LR-ISG Topics

A summary of the NRC staff's resolutions of LR-ISGs from 2001 through 2005 is available in a letter, "Summary of the 2001-2005 Interim Staff Guidance for License Renewal," dated February 6, 2007.

A summary of the NRC staff's resolutions of LR-ISGs from 2005 through 2010 is available in Section A.2, "Staff Technical Positions," Table A-8, "Summary of Changes to the Updated License Renewal Documents as a Result of License Renewal Interim Staff Guidance (LR-ISG)" of NUREG-1950, "Disposition of Public Comments and Technical Bases for Changes in the License Renewal Guidance Documents NUREG-1801 and NUREG-1800," dated April 2011.