Table C-1 Structure, System, or Component (SSC)

DOE-STD-1020-2002

SSCs must be constructed in the manner specified by the designer. Materials must be

of high quality and as strong as specified by the designer. Construction must be of

high quality and must conform to the design drawings.

By this standard, probabilistic performance goals are used as a target for formulating

deterministic seismic design criteria. Table C-1 defines seismic performance goals for

structures, systems, or components (SSCs) assigned to Performance Categories 1 through 4.

SSCs are to be assigned to performance categories in accordance with DOE G 420.1-2 (Ref. C-

67) and DOE-STD-1021-93 (Ref. C-26) in that hierarchial order. For Performance Category 3, 4

the seismic performance goals are defined in terms of a permissible annual probability of

unacceptable performance PF (i.e., a permissible failure frequency limit). Seismic induced

unacceptable performance should have an annual probability less than or approximately equal to

these goals.

Table C-1 Structure, System, or Component (SSC)

Performance Goals for Various Performance Categories

Seismic Performance Goal Annual

Probability of Exceeding

Performance Goal

Performance

Acceptable Behavior Limits, PF

Description

Category

Onset of SSC(1) damage to the extent that

Maintain Occupant Safety

occupants are endangered

Occupant Safety, Continued Operation with

SSC damage to the extent that the component

Minimum Interruption

cannot perform its function

10-4 of SSC damage to the extent that the

Occupant Safety, Continued Operation,

Hazard Confinement

component cannot perform its function

10-5 of SSC damage to the extent that the

Occupant Safety, Continued Operation,

Confidence of Hazard Confinement

component cannot perform its function

(1) SSC refers to structure, distribution system, or component (equipment).

The performance goals shown in Table C-1 include both quantitative probability values

and qualitative descriptions of acceptable performance. The qualitative descriptions of expected

performance following design/evaluation levels of earthquake ground motions are expanded in

Table C-2. These descriptions of acceptable performance are specifically tailored to the needs in

many DOE facilities.

The performance goals described above are achieved through the use of DOE seismic

design and evaluation provisions which include: (1) lateral force provisions; (2) story

drift/damage control provisions; (3) detailing for ductility provisions; and (4) quality assurance

provisions. These provisions are comprised of the following four elements taken together: (1)

seismic loading; (2) response evaluation methods; (3) permissible response levels; and (4)

ductile detailing requirements. Acceptable performance (i.e., achieving performance goals) can

C-2