ML19330C353
| ML19330C353 | |
| Person / Time | |
|---|---|
| Site: | 05000124 |
| Issue date: | 08/01/1980 |
| From: | Curtner A VIRGINIA POLYTECHNIC INSTITUTE & STATE UNIV., BLACKSB |
| To: | Joshua Wilson Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19330C354 | List: |
| References | |
| NUDOCS 8008080277 | |
| Download: ML19330C353 (2) | |
Text
..
COLLEGE OF ENGINEERING r ~
VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY
'Bladsburg, l'irginia 24061
. Necura Acmanov AM AMM LABORATORY August 1, 1980 Mr. J. Uilson U.S. Nuclear Regulatory Commission Standardization and Special Projects Branch Division of Licensing Washington D.C.
20555
Dear Sir:
3 The following data is enclosed in response to a request by Mr.
Millard Wohl via telephone conversation.
-5 Maximum calculated Argon-41 release rate is 5.5 x 10 C1/sec.
Volumetric flow rate measured in the stack is 2117 ft / min; conversion to al/sec:
0 3
0 (2117 ft / min)
(2.83 x 10 ml/ft )
(1 min /60 see) =
9.99 x 10 ml/sec Calculation of maximum concentration leaving the stock and entering the booster-fan.
-5
-11
-5 5.5 x 10 Ci/sec = 5.5 x 10 C1/ml or 5.5 x 10 pCi/ml 5
9.99 x 10 d/see Booster Fan Dilution Factor 3
The volumetric flow rate of the booster fan is 12,700 ft / min.
The booster fan provides the following dilution:
-5 3
-6 (5.5 x 10 Ci/ml)
/2117 ft / min \\ =
9.17 x 10 C1/ml 3
(12,700 ft / min Maximum vearly release allowed assuming 4 x 10' uCi/ml released continuously to an unrestricted area:
e 5
7 (4 x 10' pC1/ml)
(9.99 x 10 ml/sec)
(3.15 x 10 sec/ year) =
1.26 C1/yr h070 THIS DOCUMENT CONTAINS
.5 POOR QUAUTY PAGES ef
//
scesoso
- 2.77-P
r R
.page 2 Ur. J. 'v:11 son Calculation of environmental dispersion factor:
The current Technical Specifications allow ug to exhaust up to 315 Ci/yr not to exceed a release rate of 1 x 10 Ci/sec. (note also the enclosed safety evaluation done by the' Commission)
Therefore we assume a dispersion factor of:
1.26 C1/yr
~
4 x 10
=
315 C1/yr Calculation of maximum concentration released to an unrestricted area considering the environmental dispersion factor:
-6
-8
~
3.67 x 10 Ci/m1 (9.17 x 10 pCi/ml)
(4 x 10 )
=
This assumes we operate the reactor 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> a day, 365 days a year.
Our actual operating schedule is 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> a day, 5 days a week maximum.
Therefore averaging this concentration over the year yields: (10CFR 20.106 (a)) :
-8
.(3.67 x 10 uci/ml) /2086 hr./yrI=
8.74 x 10 ~9 pCi/mi
, 8760 hr./yr)
Sincerely yours,
{$f
(- iS.g t
Alan P. Curtner Reactor Supervisor APC/fbl
Enclosure:
Safety Evaluation by the Division of Reactor Licensing occ :
Dr. T. F. Parkinson, Director NRL Dr. A. K. Furr, Deputy. Director NRL Mr. R. D. Mogle, Radiation Safety Officer Dr. R. H. Miller, Chairman, Reactor Safety Committee 1
P-t jk
.-