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Nuclear and Facility Safety Directives

The HSS Office of Nuclear Safety is the responsible office for the development, interpretation, and revision of the following Department of Energy (DOE) directives.

Go to DOE's Directives Web Page to view these directives.


DOE Order (O) 252.1A, Technical Standards Program

DOE O 252.1A promotes DOE's use of Voluntary Consensus Standards (VCS) as the primary method for application of technical standards and establishes and manages the DOE Technical Standards Program (TSP) including technical standards development, information, activities, issues, and interactions.

HS-30 Contact: Jeff Feit


DOE Policy (P) 420.1, Department of Energy Nuclear Safety Policy

DOE P 420.1, documents the Department's nuclear safety policy to design, construct, operate, and decommission its nuclear facilities in a manner that ensures adequate protection of workers, the public, and the environment.

HS-30 Contact: James O'Brien


DOE O 420.1C, Facility Safety

DOE O 420.1C establishes facility and programmatic safety requirements for DOE and NNSA for nuclear safety design criteria, fire protection, criticality safety, natural phenomena hazards (NPH) mitigation, and System Engineer Program.

HS-30 Contact: Pranab Guha


DOE Guide (G) 420.1-1A, Nonreactor Nuclear Safety Design Guide for Use with DOE O 420.1C, Facility Safety

DOE G 420.1-1A provides an acceptable approach for safety design of DOE Hazard Category 1, 2 and 3 nuclear facilities for satisfying the requirements of DOE O 420.1C.

HS-30 Contact: Pranab Guha


DOE G 421.1-2A, Implementation Guide for Use in Developing Documented Safety Analyses to Meet Subpart B of 10 CFR 830

DOE G 421.1-2A provides guidance for effective implementation of 10 CFR 830, Subpart B, Safety Basis Requirements, which requires contractors responsible for a DOE nuclear facility to analyze the facility, the work to be performed, and the associated hazards and to identify the conditions, safe boundaries, and hazard controls necessary to protect workers, the public, and the environment from adverse consequences.

HS-30 Contact: Michael Hillman


DOE O 422.1, Conduct of Operations Order

DOE O 422.1 defines the requirements for establishing and implementing Conduct of Operations Programs at DOE facilities and projects.

HS-30 Contact: Earl Hughes


DOE G 423.1-1A, Implementation Guide for Use in Developing Technical Safety Requirements

DOE G 423.1-1A provides elaboration for the content of Technical Safety Requirements (TSRs). Section 10 CFR 830.205 of the Nuclear Safety Management rule, requires DOE contractors responsible for Hazard Category 1, 2, and 3 DOE nuclear facilities to develop TSRs. These TSRs identify the limitations to each DOE owned contractor operated nuclear facility based on the documented safety analysis (DSA) and any additional safety requirements established for the facility.

HS-30 Contact: Michael Hillman


DOE G 424.1-1B, Implementation Guide for Use in Addressing Unreviewed Safety Question Requirements

DOE G 424.1-1B provides information to assist in the implementation of Title 10 CFR Section 830.203, "Unreviewed Safety Question Process," of the Nuclear Safety Management Rules for Hazard Category 1, 2, and 3 nuclear facilities.

HS-30 Contact: Michael Hillman


DOE O 425.1D, Startup and Restart of Nuclear Facilities

DOE O 425.1D establishes requirements for verifying readiness for startup of new Hazard Category 1, 2, and 3 nuclear facilities, activities, and operations, and for restart of existing Hazard Category 1, 2, and 3 nuclear facilities, activities, and operations that have been shut down.

HS-30 Contact: James Heffner


DOE O 426.2, Personnel Selection, Training, Qualification, and Certification Requirements for DOE Nuclear Facilities

DOE O 426.2 establishes selection, training, qualification, and certification requirements for contractor personnel who can impact the safety basis through their involvement in the operation, maintenance, and technical support of Hazard Category 1, 2, and 3 nuclear facilities.

HS-30 Contact: Brendan Burns


DOE O 433.1B, Maintenance Management Program for Nuclear Facilities

DOE O 433.1B defines the safety management program required by 10 CFR 830.204(b)(5) for maintenance and the reliable performance of structures, systems and components that are part of the safety basis required by 10 CFR 830.202 at hazard category 1, 2 and 3 DOE nuclear facilities.

HS-30 Contact: James Heffner


DOE G 433.1-1A, Nuclear Facility Maintenance Management Program Guide for Use with DOE O 433.1B

DOE G 433.1-1A provides acceptable methods for implementing requirements for Nuclear Maintenance Management Programs (NMMPs) set forth in DOE O 433.1B.

HS-30 Contact: James Heffner


DOE Manual (M) 441.1-1, Nuclear Material Packaging Manual

DOE M 441.1-1 provides detailed packaging requirements for protecting workers from exposure to nuclear materials stored outside of an approved engineered contamination barrier.

HS-30 Contact: George Michael Karmis


DOE O 5480.30, Chg 1,Nuclear Reactor Safety Design Criteria

DOE O 5480.30 establishes nuclear safety design criteria applicable to the design, fabrication, construction, testing, and performance requirements of nuclear reactor facilities and safety class structures, systems, and components within these facilities.

Contact: Pranab Guha


Quality Assurance Directives


DOE O 414.1D,Quality Assurance

DOE O 414.1D ensures that DOE, including NNSA, products and services meet or exceed customers' requirements and expectations.

HS-30 Contact: Colette Broussard


DOE G 414.1-1B,Management and Independent Assessments Guide for Use with 10 CFR Part 830, Subpart A, and DOE O 414.1C, Quality Assurance; DOE M 450.4-1, Integrated Safety Management System Manual; and DOE O 226.1A, Implementation of DOE Oversight Policy

DOE G 414.1-1B provides information on establishing processes for performing effective assessments. The revision to Guide reflects updated assessment practices, international standards, and changes in DOE expectations.

HS-30 Contact: Colette Broussard


DOE G 414.1-2B,Quality Assurance Program Guide

DOE G 414.1-2B provides information on principles, requirements, and practices used to establish and implement an effective Quality Assurance Program.

HS-30 Contact: Duli Agarwal


DOE G 414.1-4,Safety Software Guide for Use with 10 CFR 830, Subpart A, Quality Assurance Requirements, and DOE O 414.1C, Quality Assurance

DOE G 414.1-4 provides acceptable methods for implementing the safety software quality assurance requirements.

HS-30 Contact: Colette Broussard


DOE O 442.2,Differing Professional Opinions for Technical Issues Involving Environment, Safety and Health

DOE O 442.2 establishes the DOE Differing Professional Opinion process for employees to raise technical concerns related to environment, safety, and health which cannot be resolved using routine processes.

HS-30 Contact: Mary Haughey




This page was last updated on March 12, 2013