Safety structures, systems, and components (safety SSCs)

DOE-STD -3009-94

refers to medical treatment for immediately life-threatening or permanently disabling

injuries (e.g., loss of eye, loss of limb).

The general rule of thumb cited above is neither an evaluation guideline nor a quantitative

criterion. It represents a lower threshold of concern for which safety-significant SSC

designation may be warranted. Estimates of worker consequences for the purpose o f

safety-significant SSC designation are not intended to require detailed analytical modeling.

Considerations should be based on engineering judgment of possible effects and the

potential added value of safety-significant SSC designation. [DOE G 420.1-1]

[Note: Safety-significant SSC as used in this Standard distinguishes a specific category

of SSCs other than safety-class SSCs. It should not be confused with the generic

modifier "safety significant" used in DOE orders.]

Safety structures, systems, and components (safety SSCs). The set of safety-class

structures, systems, and components, and safety-significant structures, systems, and

components for a given facility. [10 CFR 830]

Site boundary. A well- marked boundary of the property over which the owne r and

operator can exercise control without the aid of outside authorities.

For the purpose of implementing this Standard, the DOE site boundary is a geographic

boundary within which public access is controlled and activities are governed by DOE

and its contractors, and not by local authorities. A public road traversing a DOE site is

considered to be within the DOE site boundary if, when necessary, DOE or the site

contractor has the capability to control the road during accident or emergency

conditions.

Standard industrial hazards. Hazards that are routinely encountered in general industry

and construction, and for which national consensus codes and/or standards (e.g., OSHA,

transportation safety) exist to guide safe design and operation without the need for special

analysis to design safe design and/or operational parameters.

Specific administrative control (SAC). An administrative control is designated as a SAC

if (1) it is identified in the documented safety analysis as a control needed to prevent or

mitigate an accident scenario, and (2) it has a safety function that would be safety-

significant or safety-class if the function were provided by an SSC.

Technical safety requirements (TSRs). The limits, controls, and related actions that

establish the spec ific parameters and requisite actions for the safe operation of a nuclear

facility and include, as appropriate for the work and the hazards identified in the

documented safety analysis for the facility: Safety limits, operating limits, surveillance

requirements, administrative and management controls, use and application provisions,

and design features, as well as a bases appendix. [10 CFR 830]

To satisfy the intent of this Standard, he administrative equivalent of TSRs should also be

assigned for the cond itions, the safe boundaries, and the management of administrative

controls necessary to ensure the safe operation of the facility and to reduce the potential

risk to the public and facility workers from uncontrolled releases of nonradiological

hazardous ma terial or energy. Such equivalents designated for control of nonradiological

hazards are considered as important to safety as radiological TSRs, and are needed to

satisfy the overall process outlined in this Standard for controlling the broad spectrum of

hazards in accordance with the requirements of 10 CFR 830. Distinguishing between the

Page xxii