At the present time, rules for design of piping for nuclear power plant elevated temperature service are contained in Code Case 1592-8. A Task Group under the Code Working Group on Pipe Design has prepared a revised portion on piping for a future revision of Code Case 1592. This revised portion contains explicit equations for calculating stresses;those stresses are limited by the general stress limits of the Code Case.nThe stress equations involve the use of stress indices which, except for the B2 indices, are given in the present Code, NB-3600. This report started as an effort to develop appropriate B2 indices for inclusion on the Code Case. However, the report shows that the B1 and B2 indices are based on limit load concepts hence there is no need for the B2 indices.
展开▼
