Document: NUREG-0800
Document ID: a0bd8078-b077-48b3-83a2-5710c3303535
Document Type: srp
Title: BARRIER DESIGN PROCEDURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340544.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.3
CFR Part: 
CFR Title: 

Content:
per second) Wood-Plank 0.092 x 0.289 x 3.66 52 83 6-inch Schedule 40 Pipe 0.168 Diameter x 4.58 130 52 1-inch Steel Rod 0.0254 Diameter x 0.915 4 51 Utility Pole 0.343 Diameter x 10.68 510 55 12-inch Schedule 40 Pipe 0.32 Diameter x 4.58 340 47 Automobile 5 x 2 x 1.3 1810 59 aVelocities are horizontal velocities. For vertical velocities, 70 percent of the horizontal velocities are acceptable. For missile velocities in tornado regions other than Region I see SRP Section 3.5.1.4. 3.5.3-6 Rev. 1 - July 1981 APPENDIX A STANDARD REVIEW PLAN SECTION 3.5.3 PERMISSIBLE DUCTILITY RATIO FOR OVERALL DAMAGE PREDICTION I. INTRODUCTION In the evaluation of overall response of reinforced concrete and steel structural elements (e.g., missile barriers, columns, slabs, etc.) subjected to impactive or impulsive loads, such as impacts due to missiles, assumption of nonlinear response (i.e., ductility ratios greater than unity) of the structural elements is generally acceptable provided that the intended safety functions of the structural elements and those of safety-related systems and components supported or protected by the elements are maintained. The following-summarizes specific positions for review and acceptance of ductility ratios for reinforced concrete and steel structural.elements subjected to impactive and impulsive loads. II. SPECIFIC POSITIONS 1. Reinforced Concrete Members The technical position of the regulatory staff with regard to permissible ductility ratios is stated in Regulatory Guide 1.142. Prior to publication of Revision 1 of Regulatory Guide 1142, the staff position regarding ductility will be provided to applicants on a case-by-case basis. 2. Structural Steel Members a. For tension due to flexure Pd < 10.0 b. For columns with slenderness ratio (1/r) equal to or less than 20 Pd < 1.3 Where 1 = effective length of the member r = the least radius of gyration For columns with slenderness ratio greater than 20 Pd < 1.0 c. For members subjected to tension eu Pd <