Document: NUREG-0800
Document ID: 16650158-402d-4897-850a-bc9e2cce7648
Document Type: srp
Title: INADVERTENT OPENING OF A PWR PRESSURIZER PRESSURE RELIEF
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070726.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.6.1
CFR Part: 
CFR Title: 

Content:
suitably conservative. The results of the analysis of the transient showed that the specified acceptable fuel design limits were maintained by ensuring that the minimum departure from nucleate boiling ratio (DNBR) did not decrease below and that the maximum ** pressure within the reactor coolant and main steam systems did not exceed 110% of the design pressures. The staff concludes that the plant design in regard to transients that are expected to occur with moderate frequency and result in a decreased primary coolant inventory is acceptable and meets the relevant requirements of General Design Criteria (GDC) 10, 15, and 26 and the applicable TMI Action Plan items. This conclusion is based on the following: 1. The applicant has met the requirements of GDC General Design Criteria 10 and 26 with respect to demonstrating that resultant fuel damageintegrity is 69 maintained since the specified acceptable fuel design limits were not exceeded for the event. DRAFT Rev. 2 - April 1996 15.6.1-10 2. The applicant has met the requirements of GDC General Design Criterion 15 with respect to demonstrating that the reactor coolant pressure boundary limits have not been exceeded by this event and that resultant leakage will be within acceptable limits. This requirement has been met since the maximum pressure within the reactor coolant and main steam systems did not exceed 110% of the design pressure. 3. The applicant has met the requirements of GDC General Design Criterion 26 with respect to the capability of the reactivity control system to provide adequate control of reactivity during this event while including appropriate margin for stuck rods since the specified acceptable fuel design limits were not exceeded. 4. In meeting GDC General Design Criteria 10, 15, and 26, the staff has determined that the analysis was performed using a mathematical model that had been previously reviewed and found acceptable by the staff. The parameters used as input to this model were reviewed and