Content Guidance for Sections of Chapter 5

DOE-STD -3009-94

Category 3 facilities. The application of graded approach for TSR designation is,

however, still significant. Hazard Category 2 facilities include process operations that

have traditionally made limited use of TSR limits. These facilities have few scenarios

where one failure directly leads to large hazardous material releases, and therefore do

not warrant a large number of TSRs. Defaulting all controls to TSR coverage will create

a regulatory environment that is difficult to manage and would downplay needed

emphasis on the most significant controls. This could produce a negative impact on

facility safety.

The majority of Hazard Category 2 facilities are not anticipated to need SLs. Even

facilities that designate SLs will not need many. Potential candidates for SL designation

are restricted to those controls that prevent exceeding Evaluation Guidelines. TSRs

assigned for defense in depth and safety-significant SSCs (i.e., not related to meeting

Evaluation Guidelines) will not use SLs. The decision as to whether an operating limit

(such as an LCO) or a TSR administrative control is more appropriate is left to the

judgment of the DSA preparer. If TSR administrative controls are used, descriptions

should be sufficiently detailed that a basic understanding is provided of what is

controlled and why.

For administrative controls designated as specific administrative controls, the DSA

preparer should refer to DOE-STD-1186-2004, "Specific Administrative Controls," for

implementing SACs into TSRs.

CONTENT GUIDANCE FOR SECTIONS OF CHAPTER 5

5.1 INTRODUCTION

This section provides an introduction to the contents of this chapter based on the

graded approach and includes objectives and scope specific to the chapter as

developed.

5 . 2 R EQUIREMENTS

This section lists the design codes, standards, regulations, and DOE Orders that are

required for establishing the safety basis of the facility. The intent is to provide

only the requirements that are specific for this chapter and pertinent to the safety

analysis, and not a comprehensive listing of all industrial standards or codes or

criteria. SRIDs may be referenced as appropriate.

5 . 3 T S R CO V E R A G E

This section provides assurances that TSR coverage for the facility is complete.

The section lists the features identified in Chapters 3 and 4 that are needed to:

Provide significant defense in depth. These features are safety-significant

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