Document: NRC Regulatory Guide
Document ID: a4944d20-ef6e-480b-a45d-14425bedd2e5
Document Type: regulatory_guide
Title: ASME Code Cases Not Approved for Use (Rev. 8)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2219/ML22196A065.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.193
CFR Part: 
CFR Title: 

Content:
spherical shells in accordance with 1512.”  -1521, (i) In (a), Axial Compression, “αθG = αθL” should be changed to “αφG = αφL.” (ii) The source of the equations shown under “(a) Axial Compression” provided separate instability equations for stringer-stiffened and ring-stiffened cylindrical shells. The Code Case adopted the instability equations pertaining to ring-stiffened shells, which are less conservative than those for stringer instability, for either or both ring- or stringer-stiffened cylindrical shells. The Code Case should use the most limiting case that gives a lower allowable stress for instability based on a smaller value of capacity reduction factor or provide separate equations for the stringer-stiffened case and ring-stiffened case.  -1712.1.1, The equation “Cθh = 0.92/(Mθ - 0.636)” should be changed to “Cθh = 0.92/(Mφ - 0.636).”  -1712.1.1-1, The leftmost curve should be labeled Cθh.  -1712.2.2, In (a) Axial Compression, (i) the denominator in the formula for σφej should be (mπ/Lj)2 Χ tφ. (ii) The expressions for Cφ and Cθ should be separated. 5/9/03 Table 4. Annulled/Superseded Unacceptable Section III Code Cases DG-1408, Page 24 CODE CASE NUMBER TABLE 4 ANNULLED OR SUPERSEDED UNACCEPTABLE SECTION III CODE CASE ANNULLMENT / REVISION DATE  -1712.2.3, (i) The factor 1.944 in an older edition has been changed to 2.00. No basis is apparent. (ii) The misprint “t 1¼.” should be corrected to “t1¼.”  -1713.1.1, (i) The equation “στa=αφθΧσφθel/FS” should be changed to “στa=αφθLΧσφθel/FS.” (ii) The title of (c) should be changed to “Axial Compression Plus In-Plane Shear.”  -1713.1-1, In (b), the lower value “Ks=σra” on the vertical axis should be changed to “Ks=σha.”  -1713.2.1, (i) The headings for (b) and (c) should include the words “In-Plane.” (ii) In (b) “Axial Compression Plus Shear,” “σθ” should be changed to “σφ.” (2)