Document: NUREG-0800
Document ID: 22c713a3-851c-4195-8d52-e7a90bcbeed0
Document Type: srp
Title: LEAK-BEFORE-BREAK EVALUATION PROCEDURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0636/ML063600396.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.6.3
CFR Part: 
CFR Title: 

Content:
eliminated from design consideration. When dynamic effects of pipe rupture are eliminated, protective devices such as pipe whip restraints and jet impingement barriers are no longer needed. The staff determination is based on the following: 1. That water hammer, corrosion, creep, fatigue, erosion, environmental conditions, and indirect sources are remote causes of pipe rupture. 2. That a deterministic fracture mechanics evaluation has been completed and approved by the staff. 3. That leak detection systems are sufficiently reliable, redundant, diverse and sensitive, and that margin exists to detect the throughwall flaw used in the deterministic fracture mechanics evaluation. For DC and COL reviews, the findings will also summarize the staff’s evaluation of requirements and restrictions (e.g., interface requirements and site parameters) and COL action items relevant to this SRP section. In addition, to the extent that the review is not discussed in other SER sections, the findings will summarize the staff's evaluation of the ITAAC, including design acceptance criteria, as applicable. 3.6.3-13 Revision 1 - March 2007 V. IMPLEMENTATION The staff will use this SRP section in performing safety evaluations of DC applications and license applications submitted by applicants pursuant to 10 CFR Part 50 or 10 CFR Part 52. Except when the applicant proposes an acceptable alternative method for complying with specified portions of the Commission’s regulations, the staff will use the method described herein to evaluate conformance with Commission regulations. The provisions of this SRP section apply to reviews of applications submitted six months or more after the date of issuance of this SRP section, unless superseded by a later revision. Only dynamic effects of postulated pipe ruptures may be eliminated when LBB technology is shown to be applicable. Requirements for containment design, emergency core cooling system performance, and environmental qualification of