Document: NUREG-0800
Document ID: be033a97-be2a-4a23-91fe-52b123162b3b
Document Type: srp
Title: LOW WATER CONSIDERATIONS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070730439.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.11
CFR Part: 
CFR Title: 

Content:
applicant is required to identify differences between the design features, analytical techniques, and procedural measures proposed for its facility and the SRP acceptance criteria and evaluate how the proposed alternatives to the SRP acceptance criteria provide acceptable methods of compliance with the NRC regulations. Appropriate sections of the following documents are used by the staff for the identified acceptance criteria: Regulatory Guide 1.27 describes the applicable ultimate heat sink capabilities. Regulatory Guide 1.29 identifies seismic design bases for SSC important to safety. 1. Low Water from Drought: To meet the requirements of GDC 2, GDC 44, 10 CFR 52.17, and 10 CFR Part 100, a complete history of low water conditions at and in the vicinity of the site is needed. A thorough listing of types of phenomena, locations and durations of these events, and descriptions of hydrometeorological characteristics accompanying these events should be included. These listings and descriptions should be sufficient to establish the history of droughts in the vicinity of the site. The staff will evaluate the applicant’s evidence as it relates to low water considerations. If the staff disagrees with the applicant’s conclusions, they will request additional information. The applicant should fully document and justify its estimates or accept the staff's estimates and redesign SSC important to safety affected by low water levels. The suggested criteria of Regulatory Guide 1.27 apply when the water supply comprises part of the ultimate heat sink. 2. Low Water from Other Phenomena: To meet the requirements of GDC 2, GDC 44, 10 CFR 52.17, and 10 CFR Part 100, a complete history of low water conditions, caused by phenomena other than a drought, at and in the vicinity of the site is needed. A thorough listing of types of phenomena, locations and durations of these events, and descriptions of hydrometeorological and hydrogeological characteristics accompanying these events