Document: NUREG-0800
Document ID: 621763b9-bd48-4ded-8c42-b942a23a06d4
Document Type: srp
Title: – 15.2.5
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070680.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.2.1
CFR Part: 
CFR Title: 

Content:
cceptable fuel design limits are not exceeded, including anticipated operational occurrences. This is accomplished by assuring ensuring that appropriate margin for malfunctions, such as stuck rods, is accounted for. Specific criteria necessary to meet the relevant requirements of GDC General Design Criteria 10, 15, 17, and 26 are as follows: 23 1. The basic objectives of the review of the transients initiating events listed in subsection I are: 24 a. To identify which of the moderate-frequency transients events that result in an unplanned decrease in secondary system heat removal is the most limiting. (The term "moderate frequency" is used in this SRP section in the same sense as in the definitions of design and plant process conditions in References 8 and 9 10 and 11.)25 b. To verify that, for the most limiting transient event, the predicted plant response is such that the specific criteria given below regarding fuel damage and system pressure are satisfied. 15.2.1-5 DRAFT Rev. 2 - April 1996 c. To verify that the plant protection systems setpoints assumed in the transients analyses are selected with adequate allowance for measurement inaccuracies as delineated in Regulatory Guide 1.105 (Reference 3).26 2. The criteria for incidents of moderate frequency are: a. Pressure in the reactor coolant and main steam systems should be maintained below 110% of the design values (Ref. 2). b. Fuel cladding integrity shall be maintained by ensuring that the minimum departure from nucleate boiling ratio (DNBR) remains above the 95/95 DNBR 27 limit for PWRs and the critical power ratio (CPR) remains above the minimum 28 critical power ratio (MCPR) safety limit for BWRs based on acceptable 29 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,