Document: NUREG-0800
Document ID: 4d7d277e-c006-45d6-94df-c84845dd68d0
Document Type: srp
Title: INADVERTENT OPENING OF A PWR PRESSURIZER PRESSURE RELIEF VALVE OR A BWR
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350144.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.6.1
CFR Part: 
CFR Title: 

Content:
essary to meet the requirements of GDC 10, 15 and 26 for incidents of moderate frequency* are: I a. Pressure in the reactor coolant and main steam systems should be maintained below 110% of the design values (Ref. 5). b. Fuel cladding integrity shall be maintained by ensuring that the minimum DNBR remains above the 95/95 DNBR limit for PWRs and the CPR remains above the MCPR safety limit for BWRs based on acceptable correlations (see SRP Section 4.4). c. An incident of moderate frequency should not generate a more serious plant condition without other faults occurring independently. d. An incident of moderate frequency in combination with any single active component failure, or single operator error, shall be considered and is an event for which an estimate of the number of potential fuel failures shall be provided for radiological dose calculations. For such accidents, fuel failures must be assumed for all rods for which the DNBR or CPR falls below those values cited above for cladding integrity unless it can be shown, based on an acceptable fuel damage model (see SRP Section 4.2) that fewer failures occur. There shall be no loss of function of any fission product barrier other than the fuel cladding. e. To meet the requirements of General Design Criteria 10, 15 and 26, the positions of Regulatory Guide 1.105 (Ref. 9), "Instrument Spans and Setpoints," are used with regard to their impact on the plant response to the type of transient addressed in this SRP section. f. The most limiting plant systems single failure, as defined in the "Definitions and Explanations" of.Appendix A to 10 CFR Part 50, shall be identified and assumed in the analysis and shall satisfy the positions of Regulatory Guide 1.53 (Ref. 10). The applicant's analysis of this transient should be performed using an acceptable analyical model. If the applicant proposes to use other analytical methods, which ave not been previously reviewed and approved by the staff, these methods are evaluated by the