Appendix A to Subpart B to Part 830—General Statement of Safety Basis Policy, Table 3 sets forth DOE's expectations concerning acceptable technical safety requirements Flashcards
As appropriate for a particular DOE
nuclear facility, the section of the technical
safety requirements on: (1) Safety limits will provide information on:
The limits on process variables associated with those safety class physical barriers, generally passive, that are necessary for the intended facility function and that are required to guard against the uncontrolled release of radioactive materials. The safety limit section describes, as precisely as possible, the parameters being limited, states the limit in measurable units (pressure, temperature, flow, etc.), and indicates the applicability of the limit. The safety limit section also describes the actions to be taken in the event that the safety limit is exceeded. These actions should first place the facility in the safe, stable condition attainable, including total shutdown (except where such action might reduce the margin of safety) or should verify that the facility already is safe and stable and will remain so. The technical safety requirement should state that the contractor must obtain DOE authorization to restart the nuclear facility following a violation of a safety limit. The safety limit section also establishes the steps and time limits to correct the out-of-specification condition.
As appropriate for a particular DOE
nuclear facility, the section of the technical
safety requirements on: (2) Operating limits will provide information on:
Those limits which are required to ensure the safe operation of a nuclear facility. The operating limits section may include subsections on limiting control settings and limiting conditions for operation.
As appropriate for a particular DOE
nuclear facility, the section of the technical
safety requirements on: (3) Limiting control settings will provide information on:
The settings on safety systems that control process variables to prevent exceeding a safety limit. The limited control settings section normally contains the settings for automatic alarms and for the automatic or non-automatic initiation of protective actions related to those variables associated with the function of safety class structures, systems, or components if the safety analysis shows that they are relied upon to mitigate or prevent an accident. The limited control settings section also identifies the protective actions to be taken at the specific settings chosen in order to correct a situation automatically or manually such that the related safety limit is not exceeded. Protective actions may include maintaining the variables within the requirements and repairing the automatic device promptly or shutting down the affected part of the process and, if required, the entire facility.
As appropriate for a particular DOE
nuclear facility, the section of the technical
safety requirements on: (4) Limiting conditions for operations will provide information on:
The limits that represent the lowest functional capability or performance level of safety structures, systems, and components required to perform an activity safely. The limiting conditions for operation section describes, as precisely as possible, the lowest functional capability or performance level of equipment required for continued safe operation of the facility. The limiting conditions for operation section also states the action to be taken to address a condition not meeting the limiting conditions for operation section. Normally this simply provides for the adverse condition being corrected in a certain time frame and for further action if this is impossible.
As appropriate for a particular DOE
nuclear facility, the section of the technical
safety requirements on: (5) Surveillance requirements for operations will provide information on:
Requirements relating to test, calibration, or inspection to assure that the necessary operability and quality of safety structures, systems, and components is maintained; that facility operation is within safety limits; and that limiting control settings and limiting conditions for operation are met. If a required surveillance is not successfully completed, the contractor is expected to assume the systems or components involved are inoperable and take the actions defined by the technical safety requirement until the systems or components can be shown to be operable. If, however, a required surveillance is not performed within its required frequency, the contractor is allowed to perform the surveillance within 24 hours or the original frequency, whichever is smaller, and confirm operability.
As appropriate for a particular DOE
nuclear facility, the section of the technical
safety requirements on: (6) Administrative controls for operations will provide information on:
Organization and management, procedures, recordkeeping, assessment, and reporting necessary to ensure safe operation of a facility consistent with the technical safety requirement. In general, the administrative controls section addresses (i) the requirements associated with administrative controls (including those for reporting violations of the technical safety requirement); (ii) the staffing requirements for facility positions important to safe conduct of the facility; and (iii) the commitments to the safety management programs identified in the documented safety analysis as necessary components of the safety basis for the facility.
As appropriate for a particular DOE
nuclear facility, the section of the technical
safety requirements on: (7) Use and application provisions for operations will provide information on:
The basic instructions for applying the safety restrictions contained in a technical safety requirement. The use and application section includes definitions of terms, operating modes, logical connectors, completion times, and frequency notations.
As appropriate for a particular DOE
nuclear facility, the section of the technical
safety requirements on: (8) Design features will provide information on:
Design features of the facility that, if altered or modified, would have a significant effect on safe operation.
As appropriate for a particular DOE
nuclear facility, the section of the technical
safety requirements on: (9) Bases appendix will provide information on:
The reasons for the safety limits, operating limits, and associated surveillance requirements in the technical safety requirements. The statements for each limit or requirement shows how the numeric value, the condition, or the surveillance fulfills the purpose derived from the safety documentation. The primary purpose for describing the basis of each limit or requirement is to ensure that any future changes to the limit or requirement is done with full knowledge of the original intent or purpose of the limit or requirement.
