Document: NUREG-0800
Document ID: 74415b71-98a0-4109-9ba7-8a72a89a3d18
Document Type: srp
Title: ULTIMATE HEAT SINK
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070520.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.5
CFR Part: 
CFR Title: 

Content:
bed in the applicant's Safety Analysis Report (SAR), including related sections of Chapters 2 and 3 of the SAR, is based on 28 specific general design criteria and regulatory guides and on independent calculations and staff judgments with respect to system adequacy. The design of the ultimate heat sink is acceptable if the system and the associated complex of water sources, including retaining structures and canals or conduits connecting the sources with the station, are in accordance with the following criteria: 1. General Design Criterion 2 (GDC 2), as related to structures housing the system and the 29 system itself being capable of withstanding the effects of natural phenomena such as earthquakes, tornadoes, hurricanes, and floods. Acceptance is based on meeting the guidance of Regulatory Guide 1.29, Position C.1 and Regulatory Guide 1.27, Positions C.2 and C.3. 2. General Design Criterion 5 (GDC 5), as related to shared systems and components 30 important to safety being capable of performing required safety functions. 9.2.5-5 DRAFT Rev. 3 - April 1996 3. General Design Criterion 44 (GDC 44), as related to: 31 a. The capability to transfer heat loads from safety-related structures, systems, and components to the heat sink under both normal operating and accident conditions. b. Suitable component redundancy so that safety functions can be performed assuming a single active component failure coincident with loss of offsite power. c. The capability to isolate components, systems, or piping if required so that safety functions are not compromised. d. Acceptance is based upon meeting the guidance of Regulatory Guide 1.27, Positions C.2 and C.3; Regulatory Guide 1.72, Positions C.1, C.4, C.5, C.6, and C.7; as well as Branch Technical Position ASB 9-2. 4. General Design Criterion 45 (GDC 45), as related to the design provisions to permit 32 inservice inspection of safety-related components and equipment. For ultimate heat sink designs using dams, slopes, canals, or