Document: NUREG-0800
Document ID: f689fb6d-4711-4972-b900-1b2001877b19
Document Type: srp
Title: TSUNAMI HAZARDS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1819/ML18190A200.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.6
CFR Part: 
CFR Title: 

Content:
or site owing variable site topography and the presence of multiple as-built reactor structures. The staff envisions that the requisite calculations would be represented by one of more inundation maps for the reactor powerblock and any SSCs important to safety. The staff is also proposing the applicant’s analysis should include consideration of “associated effects” in any water surface elevation estimate. A definition of “associated effects” has been introduced in the SRP text. The current version of the SRP text places cites the need to examine historically-reported information on past tsunami occurrences and properties. The staff notes that instrumentally- recorded data such as tidal records is another valuable source of information concerning past tsunamis. The phrases “safety-related structures, systems, and components (SSCs)” and “SSCs determined to be important to safety” have been replaced in this SRP section with the phase “SSCs important to safety” to better correspond to the regulatory language cited in General Design Criteria 2. 2.4.6-22 Revision 4 - September 2018 The March 2007 version of this SRP makes reference to ANSI/ANS-2.8-1992 when estimating certain tsunami parameters. In 2002, ANSI/ANS-2.8-1992 was administratively withdrawn and is currently undergoing revision. As a consequence, reference to ANSI/ANS-2.8-1992 has been deleted from the main body of the SRP text and replaced with a footnote that until such time that an update to ANSI/ANS-2.8-1992 becomes available, the staff believes that applicants may still find some of the earlier guidance in this standard useful to consider. Other changes incorporated in this revision include the following: I. AREAS OF REVIEW Updated with editorial changes as well as content changes consistent with the discussion above. II. ACCEPTANCE CRITERIA Updated with editorial changes as well as content changes consistent with the discussion above. II. REVIEW PROCEDURES Updated with editorial