Document: NUREG-0800
Document ID: a28650b3-fa03-428d-a2bd-4a27f583710b
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070484.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6
CFR Part: 
CFR Title: 

Content:
rom the equation 0.0463D = V (cylindrical target) 0.0011W = V V 7 ft/sec (flat target) 0.0016W = V V < 7 ft/sec (flat target)116 where: = pulse duration, sec D = diameter of cylindrical pipe, feet W = width of the flat structure, feet V = impact velocity, ft/sec (d) The value of P will be obtained using the following equation: max P = 2I / max p For both cylindrical and flat structures, a margin of 35% will be added to the P values (as max specified above) to obtain conservative design loads. F(t) A( )sin( t) 0 t F(t) 65sin( t) klbf 0 t 3 ms Table B-1 Mark II LOCA-related hydrodynamic loads Summary table DRAFT Rev. 7 - April 1996 6.2.1.1.C-24 The load acceptance criteria, as specified above, corresponds to impact on rigid structures. The effect of finite flexibility of real structures will be accounted for in the following manner: When structural dynamic analysis is performed, the "rigid body" impact loads will be applied; however, the masses of the impacted structures will be adjusted by adding on the hydrodynamic masses of impact. The numerical values of hydrodynamic masses will be obtained from the appropriate correlations for cylindrical and flat structures in Figure 6-8 of NEDE-13426P. NOTE 4 Steam Condensation and Chugging Loads Single-Vent Lateral Loads The following dynamic single-vent load specification will be used: A tip lateral force given by: where A( ) = (50 - 20 /3)klbf for 3 ms 6 ms shall be applied to each downcomer with varied between 3 and 6 ms as indicated. In addition, a separate assessment shall be made for a load with a tip lateral force of for each downcomer. SRP Draft Section 6.2.1.1.C Attachment A - Proposed Changes in Order of Occurrence 6.2.1.1.C-25 DRAFT Rev. 7 - April 1996 Item numbers in the following table correspond to superscript numbers in the redline/strikeout copy of the draft SRP section. Item Source Description 1. Current PRB names and Editorial change to reflect current PRB name and abbreviations responsibility for this SRP