Document: NUREG-0800
Document ID: 54e3d49d-900d-4fe8-9297-2fc04501e4e0
Document Type: srp
Title: THERMAL AND HYDRAULIC DESIGN
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340664.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.4
CFR Part: 
CFR Title: 

Content:
mpirical correlations. For components of unusual geometry, such as the following, these relationships should be confirmed empirically, using representative data bases from approved reports of the type listed below. I 4.4-3 Rev. 1 - July 1981 a. Reactor vessel (Ref. 12). b. Jet pump (Ref. 13). c. Core flow distribution (Refs. 12 and 14). 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 limit- ing safety settings must be established for each parameter, or combinations of parameters, such that acceptance criterion 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 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). 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 capability for detection of a three percent pressure drop in the reactor coolant flow. The flow should be monitored every 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 item II.F.2 NUREG-0718 (Ref. 17) and NUREG-0737 (Ref. 18). Procedures for detection and recovery from conditions of ICC must be consistent with technical guidelines that incorporate response predictions based on appropriate analyses. III. REVIEW PROCEDURES The procedures below are used during the construction permit (CP) review to