Document: NRC Regulatory Guide
Document ID: f4c5fb1d-efb9-4168-9804-5ad3f6f64d06
Document Type: regulatory_guide
Title: Reporting Procedure for Mathematical Models Selected To Predict Heated Effluent Dispersion in Natural Water Bodies
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML0037/ML003739535.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.4
CFR Part: 
CFR Title: 

Content:
(MAT) (Exhibit I) is organized relative to the four principal types of characteristics pertinent to thermal discharge mathematical modeling: S Dischar9e Characteristics Receiving Water Characteristics Discharge/Receiving Water Interactions Model Characteristics Intructions for preparing ech section of the MAT are presented below. 1. Genad Instruction a. The basic intent of the table is to provide a simple and direct means of comparison between prototypical conditions and thoe phenomena being modeled. The MAT is not intended to suppwant the descriptive materia that normaily accompanies submisson of a modeL On the contrary, such descriptive material should comprise the textual portions of the appendix to the Environmental Report and serve as a vehicle for justifying or elaborating entries made in the table. b. A secondary objective of the MAT is to ducidate unique properties and ranges of applicability of each itemized model in order to establish a basis for differentiating between models. As a result, certain portions of the Discharge Characteristics and Receiving Water Characteristics sections are irrelevant to the models being assessed, and the Model Characteristics section and portions of the DIshle/Receiving Water Interactions section are irrelevant to the prototype. In vueh parts of the table entries need not be made. c. As a rule, models are applie4 to a set of environmental conditions that may be characterized as wont probable cam. AU table a should be wad upon these conditlons and the consequances satenfs from them. In addition, the descriptive material should indicate the environmental condition to which the table applies. If more than one set of conditions is required to cover the cases of interest, more than one MAT may be necessary. d. As presented in Exhibit 1, the MAT allows entries for four models is well w the prototype. This sructuring does not imply that four dffrent modes should be sased; any number would be acceptable. e. Individual entries to the