Document: NUREG-0800
Document ID: 70c3a8b3-09b7-4616-9cdb-338f1d2c08a0
Document Type: srp
Title: EVALUATION OF POTENTIAL ACCIDENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070222.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.2.3
CFR Part: 
CFR Title: 

Content:
be operated with an acceptable degree of safety in the event of an accident caused by the presence of hazardous materials or activities on site and/or at nearby industrial, military, or transportation facilities.24 III. REVIEW PROCEDURES In some cases it may be necessary to consult with or obtain specific data from other branches, such as the Structural Engineering Branch (SEB) or Auxiliary Systems Branch (ASB)Plant 25 Systems Branch (SPLB), regarding possible effects of external events on plant structures or 26 components. The applicant's probability calculations are reviewed, and an independent probability analysis is performed by the staff if the potential hazard is considered significant enough to affect the licensability of the site or is important to the identification of design basis events. DRAFT Rev. 3 - April 1996 2.2.3-4 All stochastic variables that affect the occurrence or severity of the postulated event are identified and judged to be either independent or conditioned by other variables. Probabilistic models should be tested, where possible, against all available information. If the model or any portion of it, by simple extension, can be used to predict an observable accident rate, this test should be performed. The design parameters (e.g., overpressure) and physical phenomena (e.g., gas concentration) selected by the applicant for each design basis event are reviewed to ascertain that the values are comparable to the values used in previous analyses and found to be acceptable by the staff. Acceptable safety analyses for the onsite storage and use of compressed or liquid hydrogen, liquid oxygen, and propane are provided in References 6 and 7. Other examples of acceptable 27 risk assessments are listed in the references subsection of this SRP section and in SRP Section