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The U.S. Nuclear Regulatory Commission is in the process of rescinding or revising guidance and policies posted on this webpage in accordance with Executive Order 14151 Ending Radical and Wasteful Government DEI Programs and Preferencing, and Executive Order 14168 Defending Women From Gender Ideology Extremism and Restoring Biological Truth to the Federal Government. In the interim, any previously issued diversity, equity, inclusion, or gender-related guidance on this webpage should be considered rescinded that is inconsistent with these Executive Orders.

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Draft Regulatory Guide (DG)-1077, "Guidelines for Environmental Qualification of Microprocessor-base

July 25, 2001MEMORANDUM TO:William D. Travers Executive Director for Operations                   /RA/FROM:John T. Larkins, Executive Director Advisory Committee on Reactor Safeguards SUB...

Review and Evaluation of the Nuclear Regulatory Commission's Safety Research Program

February 14, 2002The Honorable Richard A. Meserve Chairman U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001SUBJECT: REVIEW AND EVALUATION OF THE NUCLEAR REGULATORY COMMISSION'S SAFETY RESEARCH PROGRAMDear Chairman Meserve:During the 489th meeting of the Advisory ...

Draft Regulatory Guide DG-1123, "Verification, Validation, Reviews, and Audits for Digital Computer

November 19, 2002 MEMORANDUM TO:William D. Travers Executive Director for Operations /RA/ FROM:John T. Larkins, Executive Director Advisory Committee on Reactor SafeguardsSUBJECT:DRAFT REGULATORY GUIDE DG-1123, "VERIFICATION, VALIDATION, REVIEWS, AND AUD...

Subject: AP1000 Pre-Application Review

June 21, 2000MEMORANDUM TO:  William D. Travers Executive Director for Operations                    /RA/FROM:  John T. Larkins, Executive Director Advisory ...

Proposed Final Amendment To 10 CFR 50.55a, "Codes and Standards"

July 23, 1999The Honorable Greta Joy Dicus Chairman U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001Dear Chairman Dicus:SUBJECT: PROPOSED FINAL AMENDMENT TO 10 CFR 50.55a, "CODES AND STANDARDS" During the 464th meeting of the Advisory Committee on Reactor Safegua...

Draft Report, “Regulatory Effectiveness of the Station Blackout Rule”

June 22, 2000Dr. William D. Travers Executive Director for Operations U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001Dear Dr. Travers:SUBJECT:DRAFT REPORT, "REGULATORY EFFECTIVENESS OF THE STATION BLACKOUT RULE"During the 473rd meeting of the Advisory Committee ...

Revision to Section 9.5.1, "Fire Protection Program," of the Standard Review Plan

July 15, 2003MEMORANDUM TO:William D. TraversExecutive Director for Operations  /RA/  FROM:John T. Larkins, Executive DirectorAdvisory Committee on Reactor Safeguards  SUBJECT:REVISION TO SECTION 9.5.1, "FIRE PROTECTION PROGRAM," OF THE STANDARD R...

SECY-00-0071, Draft Regulatory Guide (DG-1095), “Guidance for Implementation of 10 CFR 50.59 (Change

April 10, 2000MEMORANDUM TO: William D. Travers Executive Director for Operations /RA/FROM: John T. Larkins, Executive Director Advisory Committee on Reactor SafeguardsSUBJECT: SECY-00-0071, DRAFT REGULATORY GUIDE (DG-1095), "GUIDANCE FOR IMPLEMENTATION OF 10 CFR 50.59 (CHANGE...

Proposed Final Regulatory Guide 1.51, Revision 3, "Design, Inspection, and Testing Criteria for Air

June 11, 2001MEMORANDUM TO:William D. Travers Executive Director for Operations           /RA/FROM:John T. Larkins, Executive Director Advisory Committee on Reactor Safeguards  SUBJECT:PROPOSED FINAL REGULA...

Proposed Final Revisions to Regulatory Guides 1.142, "Safety-related Concrete Structures for Nuclear

September 13, 2001MEMORANDUM TO:William D. Travers Executive Director for Operations                    /RA/FROM: John T. Larkins, Executive Director Advisory Committee on Reactor Safegua...

Draft Regulatory Guide DG-1079, "Criteria for Power Systems for Nuclear Power Plants" (Proposed Revi

March 11, 2003MEMORANDUM TO: William D. TraversExecutive Director for Operations /RA/FROM:John T. Larkins, Executive Director Advisory Committee on Reactor Safeguards  SUBJECT:DRAFT REGULATORY GUIDE DG-1079, "CRITERIA FOR POWER SYSTEMS FOR NUCLEAR POWER PLANTS" ...

REVISION 4 TO REGULATORY GUIDE 1.101,"EMERGENCY PLANNING AND PREPAREDNESS FOR NUCLEAR POWER REACTORS

June 13, 2003MEMORANDUM TO:William D. TraversExecutive Director for Operations /RA/ FROM:John T. Larkins, Executive DirectorAdvisory Committee on Reactor Safeguards  SUBJECT:REVISION 4 TO REGULATORY GUIDE 1.101,"EMERGENCY PLANNING AND PREPAREDNESS FOR NUCLEAR PO...

Proposed Criteria for the Treatment of Individual Requirements in a Regulatory Analysis

July 17, 2003The Honorable Nils J. Diaz ChairmanU.S. Nuclear Regulatory Commission Washington, DC 20555-0001 SUBJECT:PROPOSED CRITERIA FOR THE TREATMENT OF INDIVIDUAL REQUIREMENTS IN A REGULATORY ANALYSISDear Chairman Diaz:During the 504th meeting of the Advisory Committe...

South Texas Project, Units 1 And 2 - Draft Safety Evaluation on Exemption Requests from Special Trea

December 13, 2000MEMORANDUM TO:   William D. Travers Executive Director for Operations     /RA/FROM:John T. Larkins, Executive Director Advisory Committee on Reactor SafeguardsSUBJECT:SOUTH TEXAS PROJECT, UNITS 1 AND 2 - DRAFT SAFETY EVALUATI...

Proposed Rulemaking on 10 CFR 50.69, Draft Regulatory Guide DG-1121, and NEI 00-04

September 18, 2002MEMORANDUM TO:William D. Travers Executive Director for Operations /RA/ FROM:John T. Larkins, Executive Director Advisory Committee on Reactor SafeguardsSUBJECT:PROPOSED RULEMAKING ON 10 CFR 50.69, DRAFT REGULATORY GUIDE DG-1121, AND NEI 00-04 During the...

Confirmatory Research Program on High-Burnup Fuel

March 14, 2002Dr. William D. Travers Executive Director for Operations U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001Subject: Confirmatory Research Program on High-Burnup FuelDear Dr. Travers:In recent months, the Advisory Committee on Reactor Safeguards (ACRS)...

PROPOSED AMENDMENT TO 10 CFR 50.55a, "CODES AND STANDARDS"

April 10, 2001MEMORANDUM TO:William D. Travers Executive Director for Operations           /RA/FROM:John T. Larkins, Executive Director Advisory Committee on Reactor SafeguardsSUBJECT:PROPOSED AMENDMENT TO 10 CFR 50.55a, "CODES AND ...

Union of Concerned Scientists Report, "Nuclear Plant Risk Studies: Failing the Grade"

October 11, 2000The Honorable Richard A. Meserve Chairman U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001Dear Chairman Meserve:SUBJECT:UNION OF CONCERNED SCIENTISTS REPORT, "NUCLEAR PLANT RISK STUDIES: FAILING THE GRADE"During the 475th and 476th meetings of the...

Assessment of the Quality of PRAs

July 27, 2000MEMORANDUM TO:   William D. Travers Executive Director for Operations   /RA/FROM:John T. Larkins, Executive Director Advisory Committee on Reactor SafeguardsSUBJECT:   ASSESSMENT OF THE QUALITY OF PRAsDuring the 474th meetin...

Proposed Final Amendment to 10 CFR 50.72, "Immediate Notification Requirements for Operating Nuclear

March 13, 2000MEMORANDUM TO:  William D. Travers Executive Director for Operations /s/FROM: John T. Larkins, Executive Director Advisory Committee on Reactor SafeguardsSUBJECT: PROPOSED FINAL AMENDMENT TO 10 CFR 50.72, "IMMEDIATE NOTIFICATION REQUIREMENTS FOR OPERATI...

Response to Your August 8, 2001, Letter on the Risk-based Performance Indicators: Phase 1 Report

October 18, 2001MEMORANDUM TO:William D. Travers Executive Director for Operations                   /RA/FROM: John T. Larkins, Executive Director Advisory Committee on Reactor Safeg...

Duane Arnold Energy Center Extended Power Uprate

October 17, 2001The Honorable Richard A. Meserve Chairman U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001SUBJECT: DUANE ARNOLD ENERGY CENTER EXTENDED POWER UPRATEDear Chairman Meserve:During the 486th meeting of the Advisory Committee on Reactor Safeguards, Octo...

Differing Professional Opinion on Steam Generator Tube Integrity

February 1, 2001Dr. William D. Travers Executive Director for Operations U.S. Nuclear Regulatory Commission Washington, D. C. 20555-0001Dear Dr. Travers:Subject: DIFFERING PROFESSIONAL OPINION ON STEAM GENERATOR TUBE INTEGRITYIn a memorandum dated July 20, 2000, you requested ...

Closeout of Generic Safety Issue 168, "Environmental Qualification of Low-Voltage Instrumentation an

April 15, 2003 MEMORANDUM TO: William D. Travers Executive Director for Operations /RA/FROM:John T. Larkins, Executive Director Advisory Committee on Reactor Safeguards  SUBJECT:CLOSEOUT OF GENERIC SAFETY ISSUE 168, "ENVIRONMENTAL QUALIFICATION OF LOW-VOLTA...

Topical Report BAW-2374, “Justification for Not Including Postulated Breaks in Large-Bore Reactor Co

July 17, 2000MEMORANDUM TO:   William D. TraversExecutive Director for Operations   /RA/FROM:   John T. Larkins, Executive DirectorAdvisory Committee on Reactor SafeguardsSUBJECT:   TOPICAL REPORT BAW-2374, "JUSTIFICA...