Document: NUREG-0800
Document ID: 81955d2c-b3de-4ce3-a132-7f798c711260
Document Type: srp
Title: INTRODUCTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070675.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.0
CFR Part: 
CFR Title: 

Content:
nd CPB requires an evaluation of results, presented in the application, of analytical methods which frequently are not documented in the application. In such cases, the applicant may refer to a vendor topical report. The methods include departure from nucleate boiling (DNB) correlation development, subchannel analysis, system transient analysis, analysis of reactivity-initiated accidents (RIA), and loss-of-coolant accident (LOCA) analysis. For those cases where applicants use techniques previously considered and approved by the staff, additional review of methods may not be required. However, if new methods are involved, RSBSRXB and CPB performs a review of topical reports and other information which describe the method of analysis. Such a review generally includes vendor model description, data correlations and empirical relationships, solution techniques, summary of computer codes (if involved), sample problems, experimental verification, and comparative calculations.27 DRAFT Rev. 3 - April 1996 15.0-4 In its review of anticipated operational occurrences and postulated accidents, RSBSRXB and CPB may perform an independent check of the results submitted by the applicant. In such cases, RSBSRXB or CPB obtains input data for use in the audit analysis which is obtained from the applicant.28 Upon request of RSBSRXB, the Instrumentation and Control Systems Branch provides assistance in evaluating the sequence of postulated events, protective and safeguards systems actuation and potential bypass modes, and manual control. ICSBHICB determines whether reactor protection and safeguards control and instrumentation will function as assumed in the transient analysis with regard to manual or automatic actuation; remote sensing, indication, and control; and interlocks with auxiliary or shared systems. PSBSPLB determines the adequacy of onsite emergency power systems.29 The AEBPERB review is concentrated on those more severe accidents that could result in the 30 release of