Design Information Summary Layout Guide

DOESTD107393

As defined in the program criteria, DISs should include the following information:

System description (including system interface information)

System operability requirements

System-level design requirements

Component-level design requirements

Design basis

Related design topical information

The DIS Format and Content Guide should define the level of detail of the technical content. It should

also define the general format and approach and should include guidance on technical writing and

style. Further guidance on DIS format and content is provided in Appendix IID.

Design Information Summaries should be written for a variety of users and experience levels. The DR

action plan should have identified the end users and end uses. Users will range from operations,

maintenance, testing, procurement, training, and QA personnel to design engineers. Design

information Summaries should be tailored to meet individual facility needs and constraints, making use

of existing programs and results. The level of detail should reflect program objectives and end uses.

To avoid reliance on current experience levels, DISs should be written for a hypothetical 3year

engineer. Such an engineer (or scientist) would have a general facility background, would know the

facility layout, and would know the general actions the system has to perform. This approach defines

an appropriate DIS content without getting into unnecessary details and explanations.

For DISs, a mixed approach is preferable to comprehensive or index approaches. The index

approach involves minimal text and extensive lists of references. This approach collates the design

information and provides a road map for a prospective user. The comprehensive approach involves

text material and copies of actual design documents such as procurement specifications, with a

minimum of references. The mixed approach is a balance between the index approach and the

comprehensive approach and provides the most useful and cost-effective DISs.

The mixed approach makes significant use of text material but references key supporting design

process documents. The text includes system descriptions and drawings, operability requirements,

system functions, component information, system and component design basis, regulatory

requirements, and DOE commitments. Referenced documents include calculations and analyses,

codes and standards, design practices, procurement specifications, and TSRs. It is unnecessary to

duplicate the content of other self-contained documents such as American Society of Mechanical

Engineers (ASME) code stress reports, equipment qualification data packages, vendor manuals,

operations and maintenance procedures, industry codes and standards, specifications, generic

regulatory requirements, and calculations.

References should be to design process documents (e.g., calculations, analyses) rather than facility

operating and maintenance documents or secondary facility configuration documentation. The original

information should be referenced whenever possible to avoid translation and interpretation errors.

3.6.3 DESIGN INFORMATION SUMMARY LAYOUT GUIDE

A DIS Layout Guide, separate from the DIS Format and Content Guide, should be prepared to ensure

consistency in document layout and word processing conventions. Such a guide would contain

instructions on margins, spacing, numbering, and other issues of particular benefit to DIS word

processors and editors. The DIS Layout Guide should clearly distinguish between design requirements

II-79