NUREG-0570, Toxic Vapor Concentrations in the Control Room Following a Postulated Accidental Release Potential Error in Equation 2.2-1
| ML20010D233 | |
| Person / Time | |
|---|---|
| Issue date: | 01/10/2020 |
| From: | Anthony Williams Office of Nuclear Reactor Regulation |
| To: | |
| Williams A | |
| References | |
| NUREG-0570 | |
| Download: ML20010D233 (3) | |
Text
January 10, 2020 MEMORANDUM TO: File
SUBJECT:
NUREG-0570, TOXIC VAPOR CONCENRTATIONS IN THE CONTROL ROOM FOLLOWING A POSTULATED ACCIDENTAL RELEASE, RE: POTENTIAL ERROR IN EQUATION 2.2-1 In December 2019, Mr. Shawn Williams, Senior Project Manager, Nuclear Regulatory Commission, received an informal e-mail from a member of the public indicating a potential error in NUREG-0570, Toxic Vapor Concentrations in the Control Room Following a Postulated Accidental Release, June 1979 (ADAMS Accession No. ML063480551).
The member of the public stated:
I believe there is an error in NUREG-0570, Section 2.2.1, Equation 2.2-1. The exponent in the denominator for the 2pi term may be incorrect. It is listed as being 3/4; however, I believe it should be 3/2.
An NRC staff member informally investigated the comment and agreed with the error that was provided above.
The NRC staff member pointed out that RG 1.111, Methods for Estimating Transport and Dispersion of Gaseous Effluents in Routine Releases from Light-Water-Cooled Reactors, (ADAMS Accession No. ML003740354), Section 1.b. Plume Element Models contains the correct version of the equation.
ML20010D233 OFFICE NRR/DORL/LPL2-1/PM NAME SWilliams DATE 1/10/2020