ML14184A392
| ML14184A392 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 04/26/1983 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Utley E CAROLINA POWER & LIGHT CO. |
| References | |
| NUDOCS 8305170654 | |
| Download: ML14184A392 (2) | |
Text
DIABUTION.
NRC PDR Local PDR ORB 1 File D. Eisenhut APR 2 6 1983 OELD E. Jordan Docket No. 50-261 G. Requa C. Parrish NSIC Mr. E. E. Utley, Executive Vice President J. Taylor Power Supply and Engineering & Construction ACRS (10)
Carolina Power and Light Company P. 0. Box 1561 Raleigh, North Carolina 27602
Dear Mr. Utley:
The NRC staff has developed a theoretical model that shows that a gamma calibration factor, for TLD personnel dosimetry, can be used to accurately measure beta dose over a wide range of beta energies. A paper describing our model, coauthored by a scientist from Science Applications Incorporated, was introduced at the International Beta Dosimetry Symposium in February 1983.
To establish the validity of our theory for practical application, it is prudent to test it against "real world" radiation exposure data. Your steam generator inspection program offers a unique opportunity to collect such data from the resulting radiation exposures, as beta/garma ratio fields are normally high for these activities and TLDs can be suitably positioned for this study. Data reduction may demonstrate the practicality of using our very simple method for beta dosimetry as compared to current industry prac tices which may be more complex and provide essentially the same level of accuracy in the dose estimate.
We have had preliminary discussions with your staff (Sy Block with Steve Brown and Glenn Hudson) and have found them to be amenable towards a cooperative study with the potential for a mutually beneficial outcome.
Therefore, the purpose of this letter is to request the TLD dosimeter data, that your staff would be collecting from the steam generator inspection activities, so that we can independently determine the beta dose using our theoretical model. To.minimize the imposition on your staff we plan no further action on this study at H. B. Robinson after this information exchange is completed.
Sincerely, Original signed byl S. A. Varga Steven A. Varga, Chief 8305170654 830426 Operating Reactors Branch No. 1 PDR ADOCK 05000261 Division of Licensing G
PDR cc. See next page OFFICEO ORB 1 ORB.A.LB 4
83 3
DAE NRC FORM 318 (0-80)
RCI 0240
!OFF IC IAL RECORD COPY usGPo: 1981-ass5-se
Mr.iE. E. Utley Carolina Power and Light Company cc:- G. F. Trowbridge, Esquire Shaw, Pittman, Potts and Trowbridge 1800 M Street, N.W.
Washington, D. C. 20036 U. S. Nuclear Regulatory Commission Resident Inspector's Office H.I B. Robinson Steam Electric Plant Route 5, Box 266-1A Hartsville, South Carolina 29550 James P. O'Reilly Regional Administrator - Region II U. S. Nuclear Regulatory Commission 1O1 Marietta Street - Suite 3100 Atlanta, Georgia 30303