Grading Based on Facility Hazard Category

DOE-STD-1073-2003

Configuration Management

assigned a higher priority. The second column lists special situations and circumstances

that are independent of relative importance.

In all of the discussions on grading in this standard, where the term "facility" is used it

pertains to activities and operations, as well as the traditional use of the term facility (i.e.,

buildings).

3.10.1 Grading Based on Facility Hazard Category

Facility grading for DOE nuclear facilities is performed using DOE STD 1027, Hazard

Categorization and Accident Analysis Techniques for Compliance with DOE Order

5480.23, Nuclear Safety Analysis Reports. DOE STD 1027 provides the process for

grading DOE nuclear facilities into hazard category 1, 2, and 3 nuclear facilities where

Hazard category 1 nuclear facilities have the potential for significant off-site

consequences.

Hazard category 2 nuclear facilities have the potential for significant on-site

consequences beyond localized consequences.

Hazard category 3 nuclear facilities have the potential for only local significant

consequences.

Contractors may develop a configuration management process that recognizes the need to

impose greater requirements to ensure the configuration management for hazard

category 1 nuclear facilities than hazard category 2 or 3 nuclear facilities, based upon

their relative risks.

3.10.2 Grading Based on SSC Importance

The Nuclear Safety Management rule, 10 CFR Part 830, defines Safety SSCs as

containing both Safety Class SSCs and Safety Significant SSCs. In addition, Vital Safety

Systems may include safety systems that are important to defense-in-depth, but may not

be included in the set of Safety SSCs identified for the facility. These sets (i.e., Safety

Class SSCs, Safety Significant SSCs and Vital Safety Systems not part of the Safety

SSCs), define the relative importance of the SSCs. Additional information on classifying

these sets of SSCs can be found in the following DOE guidance documents and standards

for safety bases:

DOE G 421.1-2, Implementation Guide for Use in Developing Documented Safety

Analyses for Subpart B of 10 CFR 830

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

Requirements

DOE G 424.1-1, Implementation Guide for Use in Developing Unreviewed Safety

Question Requirements

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