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Page Title:
Using Cognizant System Engineers in the Process of Documenting Design Requirements |
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|  DOE-STD-1073-2003
Configuration Management
The significance of the difference between the design basis and the design requirements
is that a change to the design basis would necessitate a new design analysis, but a change
to a design requirement would not require a new design analysis if the design basis is not
affected.
To simplify the process, design requirements should be specified consistent with the
design basis. If the design requires a 160 GPM pump and the contractor intends to
purchase a 200 GPM pump, the procurement specification can document this without
revising the design requirements.
Documenting the CM
Design Requirements
Safety Basis
Other CM SSCs
Developing
including Vital
Safety SSCs
Define scope of CM SSCs
the Safety Basis
Safety Systems
Identify & document
design requirements
Hazard Assessment
for the CM SSCs
and Categorization
Establish design authority
Review
DSA
design requirements
Identify
Safety SSCs and major
yes
Generate
no
New facility or
Defense-in-Depth SSCs
Needed
Essential
Complete?
Design
requirements?
Requirements
yes
no
TSRs
Testing
Upgrade design
Maintenance
requirements when
Surveillance
modifying system
Procedures
Establish equipment
Training
database
Test/Validate the
Design Requirements
Document design requirements for
CM SSCs and update the Safety Basis
FIGURE 3-6 DOCUMENTING THE CM DESIGN REQUIREMENTS
3.12 Using Cognizant System Engineers in the Process of Documenting
Design Requirements
DOE O 420.1A, Facility Safety, requires contractors to designate a Cognizant System
Engineer for each system for DOE Category 1, 2, or 3 nuclear facilities. The
qualifications for the Cognizant System Engineer must be consistent with those defined
in DOE O 420.1A. In addition, as stated in DOE O 433.1, Maintenance Management
3-25
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