ML20037B648
| ML20037B648 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 03/02/1962 |
| From: | Wade I COMMONWEALTH EDISON CO. |
| To: | Lowenstein R US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 8010270592 | |
| Download: ML20037B648 (3) | |
Text
_.
^i CApeooLPe. etaoo 3
?O Commonwealth Edison Com any
.M In "
vv va west ADAMS STMEET CMICAGO 90 ILLaNoss
..e March 2, 1962.,
Mr. Robert Lowenstein, Director
,~
Division of Licensing and Regulation U.
S. Atomic Inergy Commission Washington 25, D. C.
p/
/
Dear Mr. Lowens ein:
37 ls:ter of January 5, 1962, additional inforna: ion was su: 1;ted on the Proposed Increase in Prinar7 and Se:ondarv Stean Flow 2atas for the Dresden reactor.
On Feoruary lh, 1962, Mr. 2.
S.
3oyd requested additional a7 raulic diaseser calculations and information concerning (I) d (II) copies of references.
(I)
The worn of Dr. levy and Dr. Janssen, reported in the as a n-mens ;o she January 3, 1962 suaaistal, covers a rangs of hydraulic diane ers fron 2h3" to. 500 ".
However, 07 conventional nethods of calculation, tse results show the hydraulic diameter of Dresden
!7pe I fuel ~cundles to oe.h60".
The hydraulic dianetar of a channel consa;ning a ;_;asar 2; raa; _;.;_ined sa _a_ low;;
h IV
~ 3 "3 Ib) h Ad D
P
( a w + N iT D )
Dh = Hydraulic Diameter of Flow Path (in.)
A
= Flow Area of Fuel Channel (in.2)
P
= Wetted Perimeter of Flow Path (in.)
W
= Inside Width of Channel 3ox (in.)
N
= Number of Fuel Rods in Sundle D
= Outside Diameter of Fuel Rods (in.)
In the case of the Dresden Type I fuel:
W
= h.29 in.
N
= 36 rods D
= 0.567 in.
h (h.29)2 36 7 ( 567)2/h 0.h60 in.
Dh
=
=
36 7(.567) 4th.29)
+
8010270 5 %
c.emo 5
n i
' We-are unable to determine the procedure by which a result of 0.522" for the hydraulic diameter could be achieved for the Dresden Type I fuel.
Although the Dresden fuel is within the range of application of the recent Levy-Janssen work, an additional comment may be in order.
Even if the hydraulic diameter were increased to as much as 0.600" (very unlikely) there would be negligible reduction in the burnout heat flu::.
This fact is based on a recent memorandum released by Dr. Levy and Dr. Janssen on the subject of the effect of hydraulic diameter on burnout heat flux, wnich reveals the burnout correlation being employed in these studies.
represents a hydraulic diameter of approximately 0.600" for the nass flows of interest in the Dresden reactor.
(II)
One copy of reference documents GIAP-3473 and G3AP-3h91 are-enclosed.
Cne copy of reference document G2AP-3703 is also enclosed.
You will note that this was prapared undar contrset :To. AT(Oh-3)-1??
Project Agreement 13, Tas.< F1, of the U.3 Atomic Inergy Commission so that acditional copies should 'ae available in '.lashington.
Reference document G3AP-3Sh3 is not enclosed as the work was per-forned under the same contract as 33AP-3703 above, out the report has not ye: seen approved for puolication.
Three originals and E0 copies of this letter are enclosed.
Ver7 tr:17 yours, C0;GIOT.IIALTH 3DI50Il COMPA:iI
$/
J_.-
By O
a I. L.
Wade Administrative Engineer Submitted and sworn.to before me this 4
"r-day of March, 1962, by said I. L. Wade.
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Notary Public
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