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U.S. Department of Energy			ORDER
	Washington, D.C.			   DOE O 420.2B


						Approved:  7-23-04
						Review:    7-23-06
						Expires:   7-23-08

SUBJECT:	SAFETY OF ACCELERATOR FACILITIES

1.	OBJECTIVE.  To establish accelerator-specific safety requirements which, when 
supplemented by other applicable safety and health requirements, will serve to prevent 
injuries and illnesses associated with Department of Energy (DOE) or National Nuclear 
Security Administration (NNSA) accelerator operations.

2.	CANCELLATION.  DOE O 420.2A, Safety of Accelerator Facilities, dated 1-8-01.  
Cancellation of an Order does not, by itself, modify or otherwise affect any contractual 
obligation to comply with the Order.  Cancelled Orders that are incorporated by reference 
in a contract remain in effect until the contract is modified to delete the references to the 
requirements in the cancelled Orders.

3.	APPLICABILITY.

a.	Primary DOE Organizations, Including NNSA Organizations.  Except for the 
exclusions in paragraph 3c, this Order applies to any of those Primary DOE 
Organizations involved with accelerator facilities (accelerators and their 
operations) or modules thereof, including injectors, targets, beam dumps, 
detectors, experiments, experimental halls, etc.  (See Attachment 1 for a complete 
list of Primary DOE Organizations.  This list automatically includes Primary 
DOE Organizations created after the Order is issued.)
The Administrator of NNSA shall assure that NNSA employees and contractors 
comply with their respective responsibilities under this Order.

b.	Site/Facility Management Contractors.
(
1)	Except for the exclusions in paragraph 3c, the Contractor Requirements 
Document (CRD), Attachment 2, sets forth requirements of this Order that 
will apply to site/facility management contractors whose contracts include 
the CRD.

(2)	This CRD must be included in site/facility management contracts that 
involve the management and operation of accelerators unless superseded 
by an alternative standard that is in accordance with the terms of the laws, 
regulations, and DOE directives clause of the contracts.

(3)	This Order does not apply to other than site/facility management 
contractors.  Any application of any requirements of this Order to other
than site/facility management contractors will be communicated separately 
from this Order.

(4)	The office identified in the responsibilities paragraph is responsible for 
notifying the contracting officer of which site/facility management 
contractors are affected.  Once notified, the contracting officer is 
responsible for incorporating the CRD into the contracts of affected 
site/facility management contractors via the laws, regulations, and DOE 
directives clause of the contracts.

(5)	As the laws, regulations, and DOE directives clause of site/facility 
management contracts states, regardless of the performer of the work, 
site/facility management contractors with the CRD incorporated into their 
contracts are responsible for compliance with the requirements of the 
CRD.

(a)	Affected site/facility management contractors are responsible for 
flowing down the requirements of this CRD to subcontractors at 
any tier to the extent necessary to ensure the site/facility 
management contractors’ compliance with the requirements.  

(b)	Contractors must not unnecessarily or imprudently flow down 
requirements to subcontractors.  That is, contractors will—

1	ensure that they and their subcontractors comply with the 
requirements of the CRD and 

2	incur only those costs that would be incurred by a prudent 
person in the conduct of competitive business.

c.	Exclusions.

(1)	Unmodified commercially available units that are acceptable for industrial 
applications, including (but not limited to) electron microscopes, ion 
implant devices, and x-ray generators.

(2)	Accelerator facilities not capable of creating radiological areas as defined 
in Title 10, Code of Federal Regulations (CFR), Part 835, “Occupational 
Radiation Protection; Final Rule.”

(3)	Naval Nuclear Propulsion Program accelerators covered under Executive 
Order 12344 (42 United States Code 7158 Note).

(4)	Nonmedical x-ray devices with the capability of accelerating particles to 
energies not greater than 10 MeV, which are operated in accordance with 
American National Standards Institute N43.3-1993, General Radiation 
Safety Standard for Installations Using Non-Medical X-Ray and Sealed 
Gamma-Ray Sources, Energies Up to 10 MeV, or in accordance with 
another applicable consensus standard as directed by the cognizant field 
element manager/NNSA field manager.

(5)	Low-voltage neutron generators incapable of creating high-radiation areas 
(as defined in 10 CFR 835, “Occupational Radiation Protection; Final 
Rule,”), which are operated in accordance with National Council on 
Radiation Protection Report 72-1983, Radiation Protection and 
Measurements for Low-Voltage Neutron Generators, or in accordance 
with another applicable consensus standard as directed by the cognizant 
DOE/NNSA field manager.  For the purpose of this Order, a low-voltage 
neutron generator is defined as a bench-top scale, single-purpose device 
generating neutrons by accelerating deuterons or tritons into targets 
through a maximum accelerating potential not greater than 600 kV.

(6)	Entire DOE/NNSA accelerator facilities or modules thereof when and 
only when accelerators and their operations involve or produce a sufficient 
inventory of fissionable materials to create the potential for criticality.

4.	REQUIREMENTS.  DOE/NNSA elements must require the following of contractors.

a.	Safety Assessment Document (SAD).  A SAD must— 

(1)	identify hazards and associated onsite and offsite impacts to workers, the 
public, and the environment from the facility for both normal operations 
and credible accidents;

(2)	contain sufficient descriptive information and analytical results pertaining 
to specific hazards and risks identified during the safety analysis process 
to provide an understanding of risks presented by the proposed operations;

(3)	provide appropriate documentation and detailed descriptions of 
engineered controls (e.g., interlocks and physical barriers) and 
administrative measures (e.g., training) taken to eliminate, control, or 
mitigate hazards from operation;

(4)	include or reference a description of facility function, location, and 
management organization in addition to details of major facility 
components and their operation;

(5)	be prepared as a single document addressing the hazards of the entire 
accelerator facility or as separate SADs prepared for discrete modules of 
the facility such as injectors, targets, experiments, experimental halls, or 
other types of modules; and

(6)	be maintained current and consistent with the administrative control 
measures and physical configuration of the facility and major safety 
equipment.

b.	Accelerator Safety Envelope (ASE).

(1)	A documented ASE must define the physical and administrative bounding 
conditions for safe operations based on the safety analysis documented in 
the SAD.

(2)	Any activity violating the ASE must be terminated immediately, and the 
activity must not recommence before DOE/NNSA has been notified.

c.	Unreviewed Safety Issues.  Activities that involve unreviewed safety issues must 
not be performed if significant safety consequences could result from either an 
accident or a malfunction of equipment that is important to safety or for which a 
safety analysis has not been performed.  Activities involving identified 
unreviewed safety issues must not commence before DOE/NNSA has provided 
written approval.

d.	Accelerator Readiness Reviews (ARRs).  ARRs must be performed before 
approval for commissioning and routine operation and as directed by the DOE 
cognizant Secretarial Officer/NNSA Deputy Administrator or a DOE/NNSA field 
manager.

e.	Training and Qualification.

(1)	Requirements must be established for each individual at an accelerator 
facility whose activities could affect safety and health conditions or whose 
safety and health could be affected by facility activities.  Training and 
qualification must be documented and kept current.

(2)	Only appropriately trained and qualified personnel, or trainees under the 
direct supervision of trained and qualified personnel, are permitted to 
perform tasks that may affect safety and health.

(3)	All personnel assigned to or using the accelerator facility (including 
emergency response personnel) must be trained in the safety and health 
practices and emergency plans consistent with their involvement and the 
hazards present.

f.	Written Procedures.

(1)	Written procedures and instructions for conducting activities safely must 
be maintained; must be clear, current, and consistent with management 
systems and the configuration of the facility and equipment; and must be 
approved by a facility contractor’s senior line manager who is actively 
involved in the day-to-day operation of the facility.

(2)	Procedures must include descriptions of the tasks to be performed; 
appropriate safety and health precautions and controls; and requirements 
for initial conditions to be verified, operating conditions to be maintained, 
and data to be recorded, as applicable.

(3)	At a minimum, the contractor must prepare procedures for—

(a)	operation startup, 

(b)	normal operation, 

(c)	emergency conditions, 

(d)	conduct of maintenance, 

(e)	approval and conduct of experiments, 

(f)	review and approval of facility modifications, 

(g)	management of safety-related changes, and 

(h)	control of facility access.

g.	Internal Safety Review System.

(1)	A system must be established and maintained to periodically assess and 
document the condition of the facility, equipment, and engineered safety 
systems.

(2)	Appropriateness and implementation of procedures, administrative 
controls, and personnel training and qualifications must be periodically 
reviewed and documented by the internal safety review system.

h.	Shielding Policy.  The contractor must approve and implement a written 
statement of the shielding policy for ionizing and nonionizing radiation.

5.	RESPONSIBILITIES.
NOTE:  For those activities designated as major or strategic systems as defined in DOE 
O 413.3, Program and Project Management for the Acquisition of Capital Assets, 
dated 10-13-00, the approvals listed in paragraphs 5a and 5b of this Order must be 
secured before request for approval to start operations by the appropriate acquisition 
executive authority.

a.	DOE Cognizant Secretarial Officer/NNSA Deputy Administrator.

(1)	For an accelerator facility or module that has potential for more than 
minor onsite or more than negligible offsite impacts to workers, the 
public, or the environment, approves the following:

(a)	ASE,

(b)	start of commissioning activities,

(c)	start of routine operation activities, and

(d)	exemptions from requirements of this Order.

(2)	Approves restart of an activity at an accelerator facility after a shutdown 
ordered by the DOE cognizant Secretarial Officer/NNSA Deputy 
Administrator or Assistant Secretary for Environment, Safety and Health 
because of an unreviewed safety issue, violation of an ASE, or other 
safety concern.

(3)	Provides to line organizations written guidance for implementing the 
requirements of this Order.

b.	DOE/NNSA Field Element Manager. [Footnote 1]

[Footnote 1:   The head of a field office or the head of a regional office of a federally staffed laboratory.]


(1)	Approves the start of commissioning for an accelerator facility (or 
module) that does not have potential for more than minor onsite or more 
than negligible offsite impacts to workers, the public, or the environment 
after evaluating the ASE, ARR, and SAD and determining—

(a)	that a specific ASE will appropriately bound commissioning,

(b)	that an appropriate ARR was conducted, and

(c)	that the risks as analyzed in the SAD are acceptable when 
commissioning is conducted within the specified ASE.

(2)	Approves start of routine operation for an accelerator facility (or module) 
that does not have potential for more than minor onsite or more than 
negligible offsite impacts to workers, the public, or the environment after 
evaluating the ASE, ARR, and SAD and determining—

(a)	that the ASE will appropriately bound routine operation,

(b)	that an appropriate ARR was conducted, and

(c)	that the risks as analyzed in the SAD are acceptable when routine 
operations are conducted within the specified ASE.

(3)	After completing the process defined in paragraphs 5b(1)(b) and 5b(1)(c), 
recommends to the DOE cognizant Secretarial Officer/NNSA Deputy 
Administrator approval for start of commissioning activities for an 
accelerator facility (or module ) that has the potential for more than minor 
onsite or more than negligible offsite impacts to workers, the public, or the 
environment.

(4)	After completing the process defined in paragraphs 5b(2)(b) and 5b(2)(c), 
recommends to the DOE cognizant Secretarial Officer/NNSA Deputy 
Administrator approval for start of initial routine operation activities for 
an accelerator facility (or module) that has the potential for more than 
minor onsite or more than negligible offsite impacts to workers, the 
public, or the environment.

(5)	Approves restart of an activity at an accelerator facility after shutdown 
that was ordered by a DOE/NNSA field manager because of an 
unreviewed safety issue, violation of an ASE, or other safety concern.

(6)	Approves exemptions from requirements of this Order for an accelerator 
facility or module that does not have the potential for more than minor 
onsite or more than negligible offsite impacts to workers, the public, or the 
environment.

(7)	Ensures that the CRD or alternative standard, consistent with paragraph 
3b(2), is incorporated into the contract of each affected site/facility 
management contractor through the cognizant contracting officer. 

6.	CONTACT.  Questions concerning this Order should be addressed to the Office of 
Science, 301-903-6800.

BY ORDER OF THE SECRETARY OF ENERGY:

	KYLE E. McSLARROW
	Deputy Secretary


ATTACHMENT 1.  PRIMARY DEPARTMENT OF ENERGY ORGANIZATIONS 
TO WHICH DOE O 420.2B, Safety of Accelerator Facilities, IS APPLICABLE

Office of the Secretary
Office of the Chief Information Officer
Office of Civilian Radioactive Waste Management
Office of Congressional and Intergovernmental Affairs
Office of Counterintelligence
Departmental Representative to the Defense Nuclear Facilities Safety Board
Office of Economic Impact and Diversity
Office of Electric Transmission and Distribution
Office of Energy Assurance
Office of Energy Efficiency and Renewable Energy
Energy Information Administration
Office of Environment, Safety and Health
Office of Fossil Energy
Office of General Counsel
Office of Hearings and Appeals
Office of Independent Oversight and Performance Assurance
Office of Inspector General
Office of Intelligence
Office of Legacy Management
Office of Management, Budget and Evaluation and Chief Financial Officer
National Nuclear Security Administration
Office of Nuclear Energy, Science and Technology
Office of Policy and International Affairs
Office of Public Affairs
Office of Science
Secretary of Energy Advisory Board
Office of Security
Office of Security and Safety Performance Assurance
Bonneville Power Administration
Southeastern Power Administration
Southwestern Power Administration
Western Area Power Administration


ATTACHMENT 2.  CONTRACTOR REQUIREMENTS DOCUMENT
DOE O 420.2B, Safety of Accelerator Facilities


Regardless of the performer of the work, the contractor is responsible for compliance with the 
requirements of this Contractor Requirements Document (CRD).  The contractor is responsible 
for flowing down the requirements of this CRD to subcontracts at any tier to the extent necessary to ensure the contractor’s compliance with the requirements.  In doing so, the contractor must not unnecessarily or imprudently flow down requirements to subcontractors.  That is, the contractor will ensure that it and its subcontractors comply with the requirements of this CRD to the extent necessary to ensure the contractor’s compliance and only incur costs that would be incurred by a prudent person in the conduct of competitive business.

The following items are required of the contractor organization.

1.	Safety Assessment Document (SAD).  A SAD must—
a.	identify hazards and associated onsite and offsite impacts to workers, the public, 
and the environment from the facility for both normal operations and credible 
accidents;
b.	contain sufficient descriptive information and analytical results pertaining to 
specific hazards and risks identified during the safety analysis process to provide 
an understanding of risks presented by the proposed operations;
c.	provide appropriate documentation and detailed descriptions of engineered 
controls (e.g., interlocks and physical barriers) and administrative measures 
(e.g., training) taken to eliminate, control, or mitigate risks of operation;
d.	include or reference a description of facility function, location, and management 
organization in addition to details of major facility components and their 
operation;
e.	be prepared as a single document addressing the hazards of the entire accelerator 
facility or as separate SADs prepared for discrete modules of the facility such as 
injectors, targets, experiments, experimental halls, and other type modules; and
f.	be maintained current and consistent with the administrative control measures and 
physical configuration of the facility and major safety equipment.

2.	Accelerator Safety Envelope (ASE).
a.	A documented ASE must define the set of physical and administrative bounding 
conditions for safe operations, based on the safety analysis documented in the 
SAD.
b.	Any activity violating the ASE must be terminated immediately and the activity 
must not be restarted before the Department of Energy (DOE)/National Nuclear 
Safety Administration (NNSA) has been notified.

3.	Unreviewed Safety Issues.  Activities that involve unreviewed safety issues must not be 
performed if significant safety consequences could result from either an accident or a 
malfunction of equipment that is important to safety and for which a safety analysis has 
not been performed.  Activities involving identified unreviewed safety issues must not 
commence before DOE/NNSA has provided written approval.

4.	Accelerator Readiness Reviews (ARRs).  ARRs must be performed before approval for 
commissioning and routine operation and as directed by the DOE cognizant Secretarial 
Officer/NNSA Deputy Administrator or a DOE/NNSA field manager.

5.	Training and Qualification.
a.	Training and qualification requirements must be established for each individual at 
an accelerator facility whose activities could affect safety and health conditions or 
whose safety and health could be affected by facility activities.  Training and 
qualification must be documented and kept current.
b.	Only appropriately trained and qualified personnel, or trainees under the direct 
supervision of trained and qualified personnel, are permitted to perform tasks that 
may affect safety and health.
c.	All personnel assigned to or using the accelerator facility (including emergency 
response personnel) must be trained in the safety and health practices and 
emergency plans consistent with their involvement and the hazards present.

6.	Written Procedures.
a.	Written procedures for conducting activities safely must be maintained; must be 
clear, current, and consistent with management systems and the configuration of 
the facility and equipment; and must be approved by the facility contractor’s 
senior line management who are actively involved in the day-to-day operation of 
the facility.
b.	Procedures must include descriptions of the tasks to be performed; safety and 
health precautions and controls; and requirements for initial conditions to be 
verified, operating conditions to be maintained, and data to be recorded, as 
applicable.
c.	At a minimum, the contractor must prepare procedures for— 
(1)	operation startup, 
(2)	normal operation, 
(3)	emergency conditions, 
(4)	conduct of maintenance, 
(5)	approval and conduct of experiments, 
(6)	review and approval of facility modifications, 
(7)	management of safety-related changes, and 
(8)	control of facility access.

7.	Internal Safety Review System.
a.	An internal safety review system must be established and maintained to 
periodically assess and document the condition of the facility, equipment, and 
engineered safety systems.
b.	Appropriateness and implementation of procedures, administrative controls, and 
personnel training and qualifications must be periodically reviewed and 
documented by the internal safety review system.

8.	Shielding Policy.  The contractor must approve and implement a written statement of the 
shielding policy for ionizing and nonionizing radiation.

AVAILABLE ONLINE AT:							INITIATED BY:
http://www.directives.doe.gov						Office of Science