Monitored Retrievable Storage Facility Design Criteria Policy Document - 2nd Draft

The Design Criteria Policy Document will provide guidance on the types of Design Events, Design Basis Accidents, and Design Criteria for Important To Radiological Safety Systems, Structures, and Components (SSCs) to be assumed during the design of the MRS facility. Definitions of key terms associated with Design Events are also included with this document. Appropriate combinations of Design Events and criteria is identified. This information will significantly affect both the design and cost of MRS SSCs and thus, should become input to the MRS design, cost, and licensing documents. Guidance on design criteria to be assumed for the specification of equipment is provided in section 4 of this document. Design criteria to be assumed for the various QA classifications of SSCs is provided in section 5. Note that this document references only those documents produced by the NRC or referenced in NRC documents and considered to be potentially part of the licensing basis for the MRS facility. This approach is consistent with the Regulatory Policy Document produced by the M & 0, which is currently in draft form (Reference 23). Additional detail will be included with this document as the design of the MRS facility progresses beyond conceptual design. Eventually, this information should be documented in Design Basis specifications. These will be a special group of design specifications at the same level as Configuration Item specifications. In the short term there will probably be only one specification (this document will probably be converted into a specification).