Document: NUREG-0800
Document ID: f813a982-efc9-4295-a0ff-eb6a289f39ba
Document Type: srp
Title: BOILING WATER REACTOR STABILITY
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550017.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.9
CFR Part: 
CFR Title: 

Content:
ical to the referenced design, an evaluation should address the differences and the conclusions on such differences should be included in the safety evaluation report (SER). The reviewer evaluates the applicant's SAR information on thermal-hydraulic stability concerns during normal operations and anticipated operational occurrences for compliance with specific acceptance criteria listed in subsection II of this SRP section. Specifically: 1. The reviewer verifies whether the reactor and its systems facilitate automatic protective action either to prevent thermal-hydraulic instabilities or to make certain that specified acceptable fuel design limits are not exceeded in thermal hydraulic instabilities in accordance with the recommendations of topical reports NEDO-31960 and NEDO-31960, Supplement 1, as approved by the related SER or other approved LTS methodologies. 2. The reviewer verifies whether the reactor and its subsystems are free from instabilities other than density-wave instability (e.g., startup or control system instabilities) or whether those instability modes have insignificant effects on SAFDLs. 15.9-7 March 2007 3. The reviewer verifies whether technical specifications satisfy acceptance criteria listed in subsection II of this SRP section. 4. The reviewer verifies whether all analysis methodologies including treatment of uncertainties in the submission have been reviewed and approved by staff. In cases when an approved methodology is not available, the staff may accept the use of other methodologies based on the results of audits or preliminary reviews. 5. The reviewer evaluates the need for staff-confirming calculations if design changes deviate significantly from established practice. 6. For review of a DC application, the reviewer should follow the above procedures to verify that the design, including requirements and restrictions (e.g., interface requirements and site parameters), set forth in the final safety analysis report (FSAR) meets the