Document: NUREG-0800
Document ID: 685c3a08-2aef-45d3-adfa-5101ca619cd1
Document Type: srp
Title: Revision 2 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0708/ML070850035.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5
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CFR Title: 

Content:
rvatively approximated by BTP 5-3-5 Revision 2 - March 2007 the procedures in Appendix G of the Code or from the report, “Tabulation of thermally-Induced Stress Intensity Factors (KIT) and Crack Tip Temperatures for Generating P-T Curves per ASME Section XI-Appendix G,” ORNL/NRC/LTR- 03/03. Calculations need only be performed for the beltline region, if the RTNDT of the beltline is demonstrated to be adequately higher than the RTNDT for all higher stressed regions. Alternatively, more rigorous analytical procedures may be used, provided that the intent of the Code is met, and adequate technical justification for all assumptions and bases is provided. 2.2.3 Core Operation Limits To provide added margins during actual core operation, Appendix G, 10 CFR Part 50 requires a minimum temperature during core operation, and a 22 EC (40 EF) margin in temperature over the pressure-temperature limits as determined for heatup and cooldown in 2.2.2 above. The minimum temperature, regardless of pressure, is the temperature calculated for the inservice hydrostatic test according to 2.2.1 above. 2.2.4 Upset Conditions The pressure-temperature limits described in 2.2.2 and 2.2.3 above are applicable to upset conditions. Normal operating procedures should permit variations from intended operation, including all upset conditions, without exceeding the limit curves. 2.2.5 Emergency and Faulted Conditions It is recognized that the severity of a transient resulting from an emergency or faulted condition is not directly related to operating conditions, and resulting temperature-stress relationships in the reactor coolant boundary components are primarily system dependent, and therefore not under direct control of the operator. For these reasons, operating limits for emergency and faulted conditions are not a requirement of the Technical Specifications. The SAR should present descriptions of the continued integrity of all vital components of the RCPB during postulated faulted