Document: NUREG-1555
Document ID: 16efba2d-597d-4734-84e7-046c257d75c3
Document Type: esrp
Title: HEAT-DISCHARGE 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: 5.3.3
CFR Part: 
CFR Title: 

Content:
s for ESRPs 5.1.1, 5.1.3, 5.3.3.2, and 5.8.1, and identify and evaluate means to avoid or mitigate any such impacts that are sufficiently adverse to warrant this action. (4) For spray canals, existing literature values for drift deposition rates may be used. Drift from a cooling pond or lake need not be considered. (5) Use the following references to find appropriate models for conducting any additional analyses needed: ` See Hanna et al. (1982) and Hanna (1984) for information on the atmospheric impacts of heat dissipation. ` See Carhart et al. (1982) for an evaluation of models that predict the rise and length of plumes from natural draft cooling towers. The best models of the period predict the visible plume rise within a factor of 2 and plume length within a factor of 2.5 about 50% of the time. NUREG-1555 5.3.3.1-6 October 1999 ` See Carhart and Policastro (1991) for a more recent model for natural draft and mechanical cooling towers that predicts the plume rise within a factor of 2 about 75% of the time and visible plume length within a factor of 2.5 about 70% of the time. ` See Carhart et al. (1992) for the use of this model in predicting the long shadowing and resultant decrease in solar radiation caused by cooling tower plumes. ` See Policastro et al. (1994), which extends the description to use of the model for estimating seasonal and annual cooling tower impacts, including drift deposition, icing, and fogging. (6) Perform independent analysis of additional hours of ground level fogging, icing, drift, humidity increase, and deposition of pollutants generated by offsite sources. ` The need for this analysis will depend on the level of the potential impact, the level of confidence in the applicant’s model, and the extent, applicability, and representative nature of the available meteorological data and observational experience at operating stations. ` Coordinate this analysis with the reviewers for ESRPs 5.1.1, 5.1.3, 5.3.3.2, and 5.8.1 to ensure that