Document: NRC Regulatory Guide
Document ID: 2704425a-c58a-45c4-93ab-8761721c3e7a
Document Type: regulatory_guide
Title: Evaluation of Reactor Pressure Vessels with Charpy Upper-Shelf Energy Less Than 50 Ft-Lb
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740038.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.161
CFR Part: 
CFR Title: 

Content:
semi-elliptical surface flaws are indicated in Appendix C to NUREG/CR-4486. In developing these correction factors, only uniform membrane and linear bending stresses were considered. In addition, the correction factors for circunfe-ential flaws were assumed to be the same as the ones for axial flaws. Improved solutions may be used on a case-by-case basis ifjustified. 'F.A Shnonen et al, *VISA-H - A Computer Code for Predicting te Probability of Reactor Pressure Vessel Failure* USNRC, NUREG/CR-4486, March 1986. D.L Stevens et al., 'VISA- ACoemputer Code for Predicting the hbability of Reactor Pressure Vessel Failure," USNRC, NUREO/CR-33S4, September 1983. Copies are available for inspection orcopying fora fee from the NRC Public Document Roomn at 2120 L Stee NW., Washingto DC, the PDR's ai'ling address is Mail Stop U,6. Washingtm, DC 20555; telephone (202)634-3273; fax (202)634-3343. Copies ofNUREOICRs may be purchased at curent rates from e d U.S. Government Printing Office, Post Office Box 37082, Washington, DC 20013-7082 (telephone (202)512-1200); or from the Natioad Tedmical Information Service by writing NTIS at 5285 Poat Royal Road, pringd, VA 22161. 13- I I Taken From: VISA-H Code LNUREG/CR-4486 (1986). NUREQXR-3384 (1983)] SUBROUTINE SPKI Calculate PresstireValuesand, Stren Intensity Factor, PKI DIMENSION CONST(5) REAL 1(5). IC(5) INTEGER CRAM TBE C DETERMNE POLYNOMIAL REPRESENTATION OF PRESSURE CONST(l) = PDATA(I) CONST(2) = ((-2.5)*PDATA(I)+48*PDATA(2)-36*PDATA(3)+ I 16*PDATA(4)-3*PDATA(S))1(3*TMAX) CONST(3) = (35*PDATA(l)-104*PDATA(2)+114*PDATA(3) I 56*PDATA(4)fI I *PDATA(5))*V(3*TMX**2) CONST(4) = ((-5)*PDATA(])+18*PDATAC2)-24*PDATA(3)+ I 14*PDATA(4)-3*PDATA(5))*161(3*TMAX**3) CONST(5) = (PDATA(l)-4*PDATA(2)+6*PDATA(3)-4*PDATA(4)+ I PDATA(5))*32/(3*TMAX**4) C Calculate PRESSURE Component of Applied K, PKI, For Each 1-kne Crack Depth OUTRAD=RAD+TH FACTOR = RAD**2.0 / (OUTRAD**2.0 - RAD**2.0) C DO 120 TAM = 1, 10 IT = TMAX*TflvWI0.0 DOI 10 CRACK= 1, 1CMAX