Preparation of the Final NPH Performance Category List

DOE-STD-1021-93

systems (the storage of flashlights and walkie-talkies could become an NPH design

consideration), and any water or steam lines whose seismic failure would be hazardous to the

operator.

3.10 Preparation of the Final NPH Performance Category List

After the NPH performance categorization has been performed as outlined above, the resulting

documentation should be catalogued, numbered, design reviewed, and entered into the document

control process so that the quality assurance and applicable independent peer review requirements are

satisfied. The results of the categorization should then be recorded in a component performance

category list.

In this list, components of a facility should be listed system-by-system and then category-by-category

(except PC-0 components). Both the component name and a unique component number should be

listed, along with the identification of the reference document which provides the categorization

rationale. If a component is part of more than one system, a note should be provided at the bottom of

the table identifying the other systems of which it is a part. The list should also indicate the

component function number, signifying the criterion that was the basis for selecting the performance

category.

As discussed in Subsection 3.6, it is recommended that, when many non-safety components belonging

to one performance category can be lumped into one group based on common NPH-related

characteristics or location, they be entered into this list with a single entry, unless any such component

performs a unique mission-important function.

The final list should be design reviewed and entered into the document control process as a controlled

design document with the appropriate revision number. This list should be a living document and

should be updated periodically to reflect changes in the plant design that would potentially change the

component performance categories. All such changes should be coordinated and approved by the

facility Performance Categorization Engineer.

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