ASME RA-S-1.3-2017 pdf free

ASME RA-S-1.3-2017 pdf free.Standard for Radiological Accident Offsite Consequence Analysis (Level 3 PRA) to Support Nuclear Installation Applications.
A set of objectives and high level requirements (FILRs) is provided for each technical element in the Technical Requirements (Section 4 of this Standard). The IILRs set forth the minimum requirements to assess the technical adequacy of a Level 3 analysis. independent of an application. The HLRs are delined in general terms and present the top-level logic for the derivation of more detailed SRs.
Supporting Requirements (SRs)
A set of SRs is provided for each HLR in Sections 4 and 5. Multiple IILRs are defined for each technical element.
This Standard is intended to support a wide range of applications that require a corresponding range of Level 3 analysis capabilities. Applications vary with respect to which risk meuics are employed, which decision criteria are used, the extent of reliance on the results to support a decision, and the degree of resolution required for the factors that determine the risk significance of the subject of the decision. In developing the different portions of the Level 3 PRA model. it is recognized that not every technical element (e.g.. atmospheric transport and dispersion model) will be or needs to be developed to the same degree of site specificity or the same degree of realism.
Capability Categories
The types of risk-informed PRA applications contemplated under this Standard are very broad and include applications related to design, emergency response, meteorological programs. licensing, and many other disciplines. Both regulatory risk-informed applications and applications not involving U.S. Nuclear Regulatory Commission (NRC) regulations are contemplated.
Although the range of capabilities required for each portion of the PRA to support an application falls Ofl a continuum, three levels are defined and labeled either Capability Category I, II, or Ill. so that requirements can be developed and presented in a manageable way. Table 1-1 describes, for two principal attributes of PRA. the bases for defining the Capability Categories. This table was used to develop the SRs for each HLR. It is noted that Table I-I in this Standard excludes the attribute of scope and level of detail associated with plant design. operation, and maintenance used in the analogous table in the ASME/ANS PRA Standard (RA-Sb-2013 LII). because this attribute is not generally applicable to Level 3 analyses. The two attributes of site specificity and realism provide adequate means to differentiate Capability Categories.
The intent of the delineation of the Capability Categories within the SRs is generally that the degree of site specificity and the degree of realism increases from Capability Category I to Capability Category Ill. However, the Capability Categories are not based on the level of conservatism (i.e., tendency to overestimate risk due to simplificalions in the PRA) in a particular aspect of the analysis. The level of conservatism may decrease as the Capability Category increases and more detail and more realism are introduced into the analysis. However, this is not true for all requirements, and this should not be assumed.ASME RA-S-1.3 pdf free download.