Document: NUREG-0800
Document ID: a35b0293-07ff-4bdb-9950-454f3a0e970e
Document Type: srp
Title: ICE EFFECTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070249.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.7
CFR Part: 
CFR Title: 

Content:
lated facilities. The applicant states that ice flooding may possibly raise the water surface near the A River intake to a maximum elevation of about 555 feet 170 m (555 ft) MSL. The applicant further states that ice and ice flooding on the A 24 River tributaries outside the cooling lake will not affect the plant facilities. The major tributary nearest the plant is the B Creek with the closest point located about one mile 1.6 km (1 mi) to the southeast of the site. The applicant concludes that, because of the 25 distance from the proposed site and the wide floodplain of the river, there will be no adverse effects at the plant site due to ice in the river and consequent flooding. We concur with this conclusion. The staff concludes that with respect to ice blockage of water intakes the plant design is acceptable and meets the requirements of 10 CFR Part 50, 50.55a GDC 1 and General 26 Design Criterion 2. This conclusion is based upon the following analysis, which shows 2.4.7-7 DRAFT Rev. 3 - April 1996 that position 2 of Regulatory Guide 1.27 is met with respect to ice blockage of essential water intakes. The safety-related pumps from the cooling lake are to be protected from ice blockage by means of traveling screens, stop logs, and trash racks located at the front of the lake screenhouse. In addition, the applicant proposes a warmup line from the circulating water discharge which will keep the inlet water temperature 4.5 C (40 F) during 27 winter operation. An essential cooling water screen bypass pipe is also available. We concur with the applicant that icing or ice flooding should not adversely affect the plant's safety-related facilities. For design certification reviews, the findings will also summarize, to the extent that the review is not discussed in other safety evaluation report sections, the staff’s evaluation of inspections, tests, analyses, and acceptance criteria (ITAAC), including design acceptance criteria (DAC), site interface requirements, and