Structural Criteria

DOE-STD-1128-98

Guide of Good Practices for Occupational Radiological Protection in Plutonium Facilities

the safety basis. The SAR and the analyses performed describes the design basis accidents

considered, the risk-dominated accident scenarios that have been analyzed, and the measures

taken to eliminate, control, or mitigate the consequences. The design elements discussed in

DOE Order 420.1a, Facility Safety (DOE, 2002a), shall also be considered.

Structural design including loading combinations and construction of critical items should,

as a minimum, be in accordance with current editions of pertinent nationally recognized

codes and standards. All other facility design features shall conform to applicable criteria

and to other site- or process-specific criteria developed for the facility.

C.3 STRUCTURAL CRITERIA

The structure and its associated critical equipment and the ventilation, electrical, fire protection, and

utility systems shall be designed to limit the release of radioactive materials during design-basis

accidents postulated for the facility.

The structural design, the load combinations, and the construction of critical safety and fire

protection features should be in accordance with the latest edition of applicable nationally

recognized codes. When local codes or regulations are more stringent than the nationally

recognized codes, the local codes should be followed.

C.3.1 Tornado Resistance

Critical operating areas of the facility should be designed to withstand the design-basis

tornado. Specific information on site-specific tornado hazard curves, rotational speeds,

elastic or plastic design methods, and other design criteria are provided in UCRL-53526

(Coats, 1984).

If site-specific hazard model studies are not available, a hazard model should be developed

that is consistent with the approach used in UCRL-53526 (Coats, 1984).

C.3.2 Lightning Protection

Lightning protection should be provided for all facilities. Lightning protection systems

should be designed in accordance with the most current National Fire Protection Association

(NFPA) code covering lightning protection.

C.3.3 Seismic Design Requirements

The basic seismic parameters should be derived from DOE site-specific hazard model

studies summarized in DOE-STD-1020-2002 (DOE, 2002b). If site-specific hazard model

studies are not available, a hazard model should be developed that is consistent with the

approach used in DOE-STD-1020-2002 (DOE, 2002b). Specific guidance on relating

frequency of occurrence to facility hazard levels may be obtained from UCRL-15910

(LLNL, 1989).

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