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:
to the staff is described in Generic Letter 84-23 (Reference 11). In addition, the reviewer verifies that BWR applicants have addressed noncondensible gases that may become dissolved in the reference leg of BWR water level instrumentation consistent with the positions indicated in Generic Letter 92-04 (Reference 14).80 3. The reviewer consults with ICSBHICB and HFEBHHFB concerning the design 81 82 83 acceptability of the ICC instrumentation and displays and with the Reactor Systems 84 Branch (RSB) and PTRBPERB concerning the acceptability of guidelines and 85 86 procedures for recognition and response to inadequate core cooling conditions. For new plant applicants and those PWRs subject to reference 13, the reviewer verifies that analyses of the thermal-hydraulic conditions during shutdown and low-power operations have been completed. The analyses should supplement existing information and should encompass the thermodynamic and physical states, such as a rapid boron dilution event during shutdown conditions (see Reference 9), to which the plant can be subjected. The analysis should be of 4.4-11 DRAFT Rev. 2 - April 1996 sufficient depth to provide a basis for shutdown procedures, instrumentation, equipment interaction, equipment response and operator response.87 The applicant's proposed preoperational and initial startup test programs are reviewed to determine that they are consistent with the intent of Regulatory Guide 1.68 (Ref. 15). At the 88 OL stage, the reviewer is to assure that sufficient information is provided by the applicant to identify clearly the test objectives, methods of testing, and acceptance criteria. (See par. C.2.b of Reference 15.)89 The test scope should include verification of any safety analysis codes or methods which could affect the thermal-hydraulic evaluations and which have not been previously verified. The initial startup test should also include a description of plans for a signature analysis to determine alarm setting for the loose