License Renewal Interim Staff Guidance (LR-ISG)
On this page:
This page includes links to files in non-HTML format. See Plugins, Viewers, and Other Tools for more information.
LR-ISG Process
The NRC staff develops LR-ISGs in accordance with the LR-ISG Process, Revision 2, for which a notice of availability was published in the Federal Register on June 22, 2010 (75 FR 35510). This process describes the basic framework for developing and implementing LR-ISGs, and it was developed with input from stakeholders. Under the process, the NRC staff may evaluate proposed changes to certain license renewal guidance documents and then, if warranted, implement a guidance document change through issuance of an LR-ISG. The NRC staff or stakeholders may propose changes to certain license renewal guidance documents. The process provides for interactions with stakeholders during LR-ISG development and the NRC staff provides the opportunity for public comment on each proposed LR-ISG through notices published in the Federal Register.
Current LR-ISG Topics
| Number | Topic | Status | Comments |
|---|---|---|---|
| LR-ISG-2006-03 | Staff Guidance For Preparing Severe Accident Mitigation Alternatives Analyses | Final | A notice of availability of the Final LR-ISG-2006-03 was published in the Federal Register on August 14, 2007 (72 FR 45466  ). The final LR-ISG recommends that applicants for license renewal follow the guidance provided in NEI 05-01, Revision A, "Nuclear Energy Institute Severe Accident Mitigation Alternatives (SAMA) Analysis Guidance Document," dated November 2005 when preparing SAMA analyses as part of a license renewal application. |
| 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. |
LR-ISG-2011-04 |
Updated Aging Management Criteria for Reactor Vessel Internal Components of Pressurized Water Reactors | Draft | A notice of request for public comment on Draft LR-ISG-2011-04 and accompanying Appendices was published in the Federal Register on March 20, 2012 (77 FR 16270 ). The public has until May 21, 2012 to comment on the draft LR-ISG. |
| LR-ISG-2011-05 | Ongoing Review of Operating Experience | Final | A notice of availability of the Final LR-ISG-2001-05 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 | Draft | A notice of request for public comment on Draft LR-ISG-2012-01 was published in the Federal Register on July 13, 2012 (77 FR 41457 ). The public has until August 27, 2012 to comment on the draft LR-ISG. |
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.
