RE: 2 Questions

["Fleming, Kenneth" <KENNETH.N.FLEMING@cpmx.saic.com>]

If you have the time to read, there also is a good description of MDAs in
Appendix A of HPS N13.30, "Performance Criteria for Bioassay."

-----Original Message-----
From: Abelquist, Eric [mailto:ABELQUIE@ORAU.GOV]
Sent: Tuesday, March 02, 1999 8:07 AM
To: Multiple recipients of list
Subject: RE: 2 Questions


John-

The general MDA equation for the situation when the background count time is
different than the sample count time is given by Strom and Stansbury in HP
Journal 63 (3):360-361, 1992.  The same equation can be found in NUREG-1507
(June 1998).  It is as follows:

MDA = [3 + 3.29 SQRT{(Rb)(ts)(1+(ts/tb))}]/[(eff)(ts)]

where Rb = background cpm, ts = sample count time, and tb = background count
time.  


Eric W. Abelquist
ORISE
P.O. Box 117
Oak Ridge,TN 37831
Tel (423) 576-3740
FAX (423) 241-3497
Email: abelquie@orau.gov 



-----Original Message-----
From: Evangelista, John R. [mailto:evangelistaj@coned.com]
Sent: Tuesday, March 02, 1999 7:21 AM
To: Multiple recipients of list
Subject: 2 Questions


A while back someone out there posted a Internet address for a Training
guide for Health Physics Technicians. I bookmark the site but someone
deleted it. Can anybody remember it? I think it was the Departmentof Engery
Training Guide 

Also, can I get some ideas of which formula everyone is using for MDC and
MDA Determinations. I am intrested in a formula to achived a certain MDA by
varrying sample count time only.
Thanks

John R. Evangelista
SNHPT	
Indain Point Station	
evangelistaj@coned.com
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