Source Te rm Analysis

DOE-STD -3009-94

3.4.2.X.2

Source Te rm Analysis

This subsection determines the accidental material or energy released through

the pathways of concern. Define all parameters and phenomenological models

used to derive the source term. As a minimum, this definition includes the

material at risk (as derived from the hazard identification), the release fraction

or rate that determines the initial source term, and the overall facility leakpath

factors that determine the final source term released external to the facility.

The degree of conservat ism believed to be present in the calculation needs to

be consistent with the Evaluation Guideline definition. Detailed quantification

of uncertainty is not required.

3.4.2.X.3

Consequence Analysis

This subsection determines the receptor doses associated with the relevant

pathways. Derive the doses in accordance with the definition of the Evaluation

Guideline.

The information derived from the hazard and accident analyses related to

protection of the public and potential insights gained for environmental

contamination issues needs to be compared to the facility National

Environmental Policy Act (NEPA) documentation to ensure that no significant

discrepancies exist between the DSA and that documentation.

3.4.2.X.4

Comparison to the Evaluation Guideline

This subsection compares the unmitigated receptor dose for the accident

sequence to the Evaluation Guideline. If the Evaluation Guideline is exceeded,

provide a summary assessment of the significance of the exceedance and

administrative and/or engineered controls whose implementation would

prevent or mitigate the accident sequence. Detailed cost-benefit analyses to

evaluate potential changes are beyond the scope of the DSA.

3.4.2.X.5

Summary of Safety-Class SSCs, SACs and TSR Controls

This subsection identifies the safety-class SSCs (or equivalent SAC) and

assumptions judged to require TSR coverage. Any TSR assumption not

directly related to exceeding of the Evaluation Guideline should be defined in

section 3.3.2.3.2, "Defense in Depth." For details, refer to Chapter 4, "Safety

Structures, Systems, and Components," and Chapter 5, "Derivation of

Technical Safety Requirements."

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