Document: NUREG-1555
Document ID: 5a4eb38b-9f84-4cc6-ab01-0be817580f4c
Document Type: esrp
Title: INTAKE SYSTEM
Source: NUREG-1555
Source URL: https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1555/initial/
Revision Date: 2007-10
Chapter: 5
Section ID: 5.3.1
CFR Part: 
CFR Title: 

Content:
ecies are present and are susceptible to entrainment such that effects will be detectable or may destabilize or noticeably alter fish or shellfish population levels, then continue the analysis at Step (3). Otherwise, prepare a statement for the supplemental EIS (SEIS) describing the potential for entrainment of fish and shellfish in early life stages that ` summarizes the permitting information, species data, and methods for quantifying fish and shellfish entrainment that have been reviewed ` states that there are no populations of fish or shellfish species present in the vicinity of the site that will be entrained in the cooling water intake system to the point where changes in their population levels are detectable ` concludes that, because fish and shellfish populations will remain stable even if some are entrained, the cooling water intake system impacts of entrainment on fish and shellfish in early life stages are SMALL within the context of the analysis in NUREG-1437. (3) Estimate the levels of susceptibility in either qualitative or quantitative terms, or both. Methods for quantifying entrapment and impingement susceptibilities are not well developed; therefore, it may be necessary to draw on the experience of comparable, currently operating power stations to predict whether the potential is HIGH, MEDIUM, or LOW for the proposed plant. Methods for quantifying entrainment susceptibilities are available; however, they are generally applicable to specific habitat species station characteristics. ` Ensure that assumptions made in available model developments are valid for the case under review. ` Consider habitat type in determining levels of susceptibility. (4) After identifying the “important” species and determining their susceptibility, estimate the survival rates for those species impinged or entrained by relying on experience at other stations. Certain species have been shown to be especially fragile (e.g., threadfin shad, menhaden, bay anchovy),