"This Department of Energy (DOE or Department) Guide provides information plus acceptable
methods for implementing the safety software quality assurance (SQA) requirements of DOE
O 414.1C, Quality Assurance, dated 6-17-05. DOE O 414.1C requirements supplement the
quality assurance program (QAP) requirements of Title 10 Code of Federal Regulations
(CFR) 830, Subpart A, Quality Assurance, for DOE nuclear facilities and activities. The safety
SQA requirements for DOE, including the National Nuclear Security Administration (NNSA),
and its contractors are necessary to implement effective quality assurance (QA) processes and
achieve safe nuclear facility operations.
DOE promulgated the safety software requirements and this guidance to control or eliminate the
hazards and associated postulated accidents posed by nuclear operations, including radiological
operations. Safety software failures or unintended output can lead to unexpected system or
equipment failures and undue risks to the DOE/NNSA mission, the environment, the public, and
the workers. Thus DOE G 414.1-4 has been developed to provide guidance on establishing and
implementing effective QA processes tied specifically to nuclear facility safety software
applications. DOE also has guidance1 for the overarching QA program, which includes safety
software within its scope. This Guide includes software application practices covered by
appropriate national and international consensus standards and various processes currently in use
at DOE facilities.2 This guidance is also considered to be of sufficient rigor and depth to ensure
acceptable reliability of safety software at DOE nuclear facilities.
This guidance should be used by organizations to help determine and support the steps necessary
to address possible design or functional implementation deficiencies that might exist and to
reduce operational hazards-related risks to an acceptable level. Attributes such as the facility
life-cycle stage and the hazardous nature of each facility’s operations should be considered when
using this Guide. Alternative methods to those described in this Guide may be used provided
they result in compliance with the requirements of 10 CFR 830 Subpart A and DOE O 414.1C.
Another objective of this guidance is to encourage robust software quality methods to enable the
development of high quality safety applications."