Appendix II-B Examples of Design Information

DOESTD107393

APPENDIX IIB

EXAMPLES OF DESIGN INFORMATION

This appendix provides examples of design documents at various stages of the design process. This

illustrates how certain common design documents may be categorized within the design process. The

important differentiation demonstrated here is between design requirements (design output documents)

and design basis (design inputs, constraints, and analysis and calculations).

This appendix also provides examples of both design requirements and design basis, illustrating the

relationship between them and demonstrating their differences. The examples show the types of

information; they do not constitute complete requirements or basis.

Design Input Documents.

Specific functional requirements

- Interfacing systems/functions

- Safety/quality class

- Load purpose/function

- Load sequence

- Interlocks/protection requirements

- Operator interface requirements

- Bypass indications

- Post-event accessibility

- System support requirements

Specific survivability requirements

Normal service environment

- Loss of HVAC

- Site hazards (seismic, tornado, missile, flood, freeze, lightning)

- Transients

- Fire/Safe shutdown

- Vibration

Specific performance requirements

- System flow requirements

- Preferred failure modes

- Reliability/availability goals

- System/component impedance

- Load duty cycle

- Load electrical characteristics

- Transient response

- Testability

- Separation/independence/diversity requirements

Specific standards

- American Society of Mechanical Engineers (ASME)

- American National Standards Institute (ANSI)

- American Society of Civil Engineers (ASCE)

- Institute of Electrical and Electronics Engineers (IEEE)

- American Concrete Institute (ACI)

II-B-1