Safety Classification of Structures, Systems, and Components

DOE-STD-1021-93

(ii)

Hazard categorization of nuclear facilities in accordance with DOE-STD-1027-92

(Reference 5) which results in facility hazard categories HC1 (highest), HC2, and

HC3 (lowest).

(iii)

Safety classification of SSCs determined in accordance with DOE O 5480.30, DOE O

5481.I B, and DOE-STD-3009-94 (CHG-1).

(iv)

Identification of SSCs whose failure may adversely affect the general life safety of

facility occupants as described in the NPH Implementation Guide to DOE Order 420.1

(DOE O 420.1-2).

(b)

Additional data or information needed may be obtained by referring to design documents and

facility accident analyses.

2.3

Safety Classification of Structures, Systems, and Components

(a)

For performance categorization of SSCs in accordance with this standard, "safetyclass"and

"safety-significant" SSCs shall be as defined in DOE-STD-3009-94 (CHG-1) and DOE O

5480.30.

(b)

An SSC, failure of which may impair or adversely affect an operator action that is required

for safety during and following an NPH event, shall also be treated as a safety-class or safety-

significant SSC for the purpose of selecting performance category in accordance with this

standard.

(c)

Even if an SSC is not classified as safety-class or safety-significant according to the

provisions of Paragraphs (a) and (b) above, it shall be treated as such if its failure by itself or

its common-cause failure with one or more SSCs result in the nonperformance of a safety

function identified in the safety analysis.

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