Document: NUREG-0800
Document ID: 5657a07e-c0b2-48ce-aaad-64d91609c4b3
Document Type: srp
Title: ICE EFFECTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0701/ML070100648.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.7
CFR Part: 
CFR Title: 

Content:
ide 1.27 apply when the water supply comprises part of the ultimate heat sink. 3. Ice Sheet Formation: The application should include estimates of the most severe ice- sheet formation in water storage reservoirs. The reduction in liquid water storage capacity of water storage reservoirs due to the presence of the ice sheet should be estimated. The suggested criteria of Regulatory Guide 1.27 apply when the water supply comprises part of the ultimate heat sink. 4. Ice-induced Forces and Blockages: The application should provide estimates of the most severe ice-induced forces on safety-related SSC. The forces resulting from the most severe ice sheet interacting with safety-related SSC should be estimated. An assessment regarding formation of frazil ice at and in the vicinity of the site is needed. Blockages from frazil of safety-related intakes should be assessed. Ice blockage of rivers, streams, and estuaries, both upstream and downstream of the site, should be determined. The suggested criteria of Regulatory Guide 1.27 apply when the water supply comprises part of the ultimate heat sink. 5. Consideration of Other Site-Related Evaluation Criteria: The application should demonstrate that the potential effects of site-related proximity, seismic, and non-seismic information as they relate to worst-case icing scenarios adjacent to and on the plant site and site regions are appropriately take into account. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. Pursuant to GDC 2, nuclear power plant SSC important to safety be designed to withstand the effects of natural phenomena such as earthquake, tornado, hurricane, flood, tsunami, and seiche without loss of capability to perform their safety functions. The criterion further specifies that the design bases for these SSC shall reflect the following: A. Appropriate consideration of the most