Document: NUREG-0800
Document ID: b3748a15-3b80-4626-a0a5-eb9f270739ad
Document Type: srp
Title: DETERMINATION OF RUPTURE LOCATIONS AND DYNAMIC EFFECTS ASSOCIATED
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340555.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.6.2
CFR Part: 
CFR Title: 

Content:
licable, In the reduction of jet discharge. 3.6.2-17 Rev. 1 - July 1981 (5) Piping movement should be assumed to occur in the direction of the jet reaction unless limited by structural members, piping restraints, or piping stiffness as demonstrated by inelastic limit analysis. c. Through-Wall Leakage Cracks The following through-wall leakage cracks should be postulated in moderate-energy fluid system piping at the locations specified in B.2 or this position: (1) Cracks should be postulated in moderate-energy fluid system piping and branch runs exceeding a nominal pipe size of 1 inch. These cracks should be postulated individually at locations that result in the most severe environmental consequences. (2) Fluid flow from a crack should be based on a circular opening of area equal to that of a rectangle one-half pipe-diameter in length and one half pipe wall thickness in width. (3) The flow from the crack should be assumed to result in an environ- ment that wets all unprotected components within the compartment, with consequent flooding in the compartment and communicating compartments. Flooding effects should be determined on the basis of a conservatively estimated time period required to effect corrective actions. C. REFERENCES 1. 10 CFR Part 50, Appendix A, General Design Criterion 4, "Environmental and Missile Design Basis." 2. "Boiler and Pressure Vessel Code," Section III and XI, American Society of Mechanical Engineers. 3. Regulatory Guide 1.11, "Instrument Lines Penetrating Primary Reactor Containment." 3.6.2-18 Rev. 1 - July 1981