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:
ooding, ice blockage of water intakes, ice forces on structures, and the minimum low water levels (from upstream ice blockage). If the applicant's estimates are within acceptable margins (described in Acceptance Criteria), staff concurrence with the applicant's estimate will be stated. If the applicant's estimates are not within acceptable margins, if the staff predicts potential blockage of the intake, or if the proposed plant may be adversely affected, a statement of the staff bases will be made. If the icing conditions do not constitute a design basis, the findings will so indicate. For operating license (OL) or COL reviews of plants for which detailed icing reviews were 22 made at the CP stage, the CP conclusions will be referenced. However, a review will be made to assure ensure that the design basis established in the CP review has been implemented properly. In addition, a review of icing records since the CP review will be made. If no CP review was undertaken (of the scope indicated), this fact will be noted in the OL findings. A sample CP statement follows: The staff concludes that with respect to ice flooding the plant design is acceptable and meets the requirements of General Design Criteriona 1 and 2 and 10 CFR Part 100. 23 This conclusion is based upon the following analysis which shows that safety-related structures identified in Regulatory Guide 1.29, are designed to withstand the effects of ice floods in accordance with position 1 of Regulatory Guide 1.59. This position is met in accordance with position 1.a of Regulatory Guide 1.102 which discusses dry sites. Ice flooding, which is common on the A River at the makeup intake structure, could only affect the river intake structure which would not result in any adverse effects to the plant's safety-related 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