Document: NUREG-0800
Document ID: c9c204f0-a162-491c-8c25-ee0418212f29
Document Type: srp
Title: PRESSURE-TEMPERATURE LIMITS, UPPER-SHELF ENERGY, AND PRESSURIZED
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0703/ML070380185.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.3.2
CFR Part: 
CFR Title: 

Content:
, safety analyses must be provided that include proposed flux reduction programs or other corrective actions to prevent potential PTS-related failure of the reactor vessel if continued plant operation beyond the screening criterion is allowed. B. Pressurized Thermal Shock Requirements. In accordance with 10 CFR 50.61, values of RTPTS projected using the methods of 10 CFR 50.61 for the time of the initial application submittal and for the projected expiration date of the operating license must not exceed the screening criteria of 132 EC (270 EF) for plates, forgings, and axial weld materials, and 149 EC (300 EF) for circumferential weld materials, throughout the facility’s licensed operating permit. This assessment must be updated whenever projected values of RTPTS change significantly, or upon request for a change in the expiration date for operation of the facility. For RTPTS values projected to exceed the screening criteria, safety analyses must be provided that include proposed flux reduction programs or other corrective actions to prevent potential PTS-related failure of the reactor vessel if continued plant operation beyond the screening criterion is allowed. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. GDC 1 and 10 CFR 50.55a establish quality assurance requirements for the design, fabrication, erection, and testing of SSCs important to safety. GDC 1 establishes that the quality standards to be applied to SSCs shall be commensurate with the importance of the safety functions to be performed. 10 CFR 50.55a establishes, in relevant part, those provisions of the ASME Code that must be complied with to ensure that SSCs are 5.3.2-7 Revision 2 - March 2007 designed, fabricated, erected, tested, and inspected to quality standards commensurate with the importance of the safety function to be performed. The RCPB’s primary