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:
moderator temperature coefficient, void coefficient, Doppler coefficient, axial power profile, and radial power distribution. d. Mitigating systems should be assumed to be actuated in the analyses at setpoints with allowance for instrument inaccuracy in accordance with Regulatory Guide 1.105. Compliance with Regulatory Guide 1.105 is determined by ICSBHICB.41 Technical Rationale The technical rationale for application of acceptance criteria for the inadvertent opening of a PWR pressurizer pressure relief valve or a BWR pressure relief valve is discussed in the following paragraphs:42 1. Compliance with GDC 10 requires that the reactor core and associated coolant, control, and protection systems be designed with appropriate margin to ensure that specified acceptable fuel design limits are not exceeded during any condition of normal operation, including the effects of anticipated operational occurrences. GDC 10 is applicable to this section because the reviewer evaluates the consequences of an inadvertent opening of a PWR pressurizer pressure relief valve or a BWR pressure relief valve. These are anticipated operational occurrences with the potential to exceed allowable thermal design criteria for fuel cladding integrity. Regulatory Guide 1.53 provides guidance for applying the single failure criterion to the design and analysis of nuclear power plant protection systems. Regulatory Guide 1.105 provides guidance for ensuring that instrument setpoints are initially within and remain within the technical specification limits. Meeting the requirements of GDC 10 provides assurance that specified acceptable fuel design limits are not exceeded for the inadvertent opening of a PWR pressurizer pressure relief valve or a BWR pressure relief valve.43 2. Compliance with GDC 15 requires that the reactor coolant system and associated auxiliary, control, and protection systems be designed with sufficient margin to ensure DRAFT Rev. 2 - April 1996 15.6.1-6 that the design conditions