Document: NRC Regulatory Guide
Document ID: c9ebcbb0-96c4-4d29-be51-5acae9cc858a
Document Type: regulatory_guide
Title: Estimating Aquatic Dispersion of Effluents from Accidental and Routine Reactor Releases for the Purpose of Implementing Appendix I (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740390.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.113
CFR Part: 
CFR Title: 

Content:
ver discharges at beginning and end of line source, respectively R Recirculation factor for impoundments Rh Hydraulic radius S Salinity in estuary S 0 Salinity at downstream boundary of estuary t Time td Duration of pulse discharge T Tidal period th Half-life of radionuclide u Velocity in x direction uSectional mean velocity in x direction u' Deviation from sectional mean velocity U Vertically averaged velocity in x direction U Sectionally averaged longitudinal velocity in river or estuary Uf Sectionally averaged fresh water velocity in estuary Ut RS velocity in an oscillating flow u* Shear velocity 1.113-47 LIST OF SYMBOLS (Continued) SDescription v Velocity in y direction V Vertically averaged velocity in y direction VE Volume of epilimnion in stratified impoundment VH Volume of hypolimnion in stratified impoundment Vmax Maximum local tidal velocity VT Total volume of impoundment W Rate of radioactivity addition, in Cl/sec x Longitudinal coordinate x Dimensionless longitudinal coordinate y Lateral coordinate Ys Lateral position of a point source Yslys2 Lateral positions of beginning and end of line source In cartesian coordinates z Vertical coordinate z S Vertical position of a point source m Dimensionless coefficient Dimensionless coefficient . r Dimensionless cross-sectionally averaged concentration rmax r at the source position SZyLateral turbulent diffusion coefficient ez Vertical turbulent diffusion coefficient Water surface elevation above undisturbed datum e Dimensionless time (ratio of time to flushing time) A Radioactive decay coefficient (ln2/tN) Dimensionless longitudinal distance from source in a one-dimensional estuary CYBUz Standard deviations of radionuclide concentrations in y- and z directions, respectively T Ratio of the half-life to the impoundment flushing time ,T• xi x and y components of surface wind stress x Nondecaying concentration SxDimensionless nondecaying concentration 1.113-48 CITED REFERENCES 1. G. H. Jirka, G. Abraham, and D. R.