Document: NUREG-0800
Document ID: 145ec0f9-012b-4669-9627-ed1b1d0cce95
Document Type: srp
Title: THERMAL AND HYDRAULIC DESIGN
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070412.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.4
CFR Part: 
CFR Title: 

Content:
s the following, these relationships should be confirmed empirically, using representative data bases from approved reports of the type listed below. a. Reactor vessel (Ref. 12Reference 27) . 39 DRAFT Rev. 2 - April 1996 4.4-6 b. Jet pump (Ref. 13Reference 28) . 40 c. Core flow distribution (Refs. 12 and 14References 27 and 29).41 5. The proposed technical specifications should be established such that the plant can be safely operated at steady state conditions under all of the expected combinations of system parameters. The safety limits and limiting safety settings must be established for each parameter, or combinations of parameters, such that specific acceptance criterion 42 1, above, is satisfied. 6. Preoperational and initial startup test programs should follow the recommendations of Regulatory Guide 1.68 (Ref. 15) , as regards measurements, and confirmation of thermal 43 hydraulic design aspects. 7. The design description and proposed procedures for use of the loose parts monitoring system should be consistent with the requirements of Regulatory Guide 1.133 (Ref. 16).44 8. The effects of crud should be accounted for in the thermal-hydraulic design by including it in the CHF calculations in the core or in the pressure drop throughout the RCS. Process monitoring provisions should assure the capability for detection of a three 45 percent pressure drop in the reactor coolant flow. The flow should be monitored every 46 24 hours. 9. Instrumentation provided for an unambiguous indication of ICC, such as primary coolant saturation meters in PWRs, reactor vessel measurement systems, and core exit thermocouples, should meet the design requirements described in of TMI Action item II.F.2 of NUREG-0718 (Ref. 17) and NUREG-0737 (Ref. 18Reference 8) and for 47 applicants subject to 10 CFR 50.34(f), paragraph 10 CFR 50.34(f)(2)(xviii). 48 Procedures for detection and recovery from conditions of ICC must be consistent with technical guidelines, including applicable EPGs