Document: NUREG-0800
Document ID: 786da65a-4915-4af3-afb3-678b7df5bea7
Document Type: srp
Title: OTHER SEISMIC CATEGORY I STRUCTURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070327.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.4
CFR Part: 
CFR Title: 

Content:
s used, the following load combinations should be considered: (1) D + L (2) D + L + E 3.8.4-11 DRAFT Rev. 2 - April 1996 (3) D + L + W If thermal stresses due to T and R are present, the following 0 0 combinations should also be considered: (4) D + L + T + R 0 0 (5) D + L + T + R + E 0 0 (6) D + L + T + R + W 0 0 Both cCases ofin which L havinghas its full value or beingin which the value is completely absent should be checkedconsidered.46 (b) If the strength design method is used, the following load combinations should be considered: (1) 1.4 D + 1.7 L (2) 1.4 D + 1.7 L + 1.9 E (3) 1.4 D + 1.7 L + 1.7 W If thermal stresses due to T and R are present, the following 0 0 combinations should also be considered: (4) (0.75) (1.4D + 1.7L + 1.7T + 1.7R ) 0 0 (5) (0. 75) (1.4D + 1. 7L + 1. 9E + 1. 7T + 1.7R ) 0 0 (6) (0.75) (1.4D + 1.7L + 1.7W + 1.7T + 1.7R ) 0 0 In addition, the following combinations should be considered: (7) 1.2 D + 1.9 E (8) 1.2 D + 1.7 W (ii) For factored load conditions which represent extreme environmental, abnormal, abnormal/severe environmental, and abnormal/extreme environmental conditions, the strength design method should be used and the following load combinations should be considered: (a) D + L + T + R + E' 0 0 DRAFT Rev. 2 - April 1996 3.8.4-12 (b) D + L + T + R + W 0 0 t (c) D + L + T + R + 1.5 P a a a (d) D + L + T + R + 1.25 P + 1.0 (Y + Y + Y ) + 1.25E'E a a a r j m 47 (e) D + L + T + R + 1.0 P + 1.0 (Y + Y + Y ) + 1.0 E' a a a r j m In combinations II.3(b)(ii) (b), (d), and (e), the maximum values of P , 48 a T , R , Y , Y , and Y , including an appropriate dynamic load factor, a a j r m should be used unless a time-history analysis is performed to justify otherwise. Combinations II.3(b)(ii)(b), and (d) and (e) and the 49 corresponding structural acceptance criteria of subsection I.5 of this SRP section should be satisfied first without the tornado missile load in (b) and without Y , Y , and Y in (d) and (e). When considering these r j m