ML20039D507
| ML20039D507 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 12/29/1981 |
| From: | Nichols T SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8201050077 | |
| Download: ML20039D507 (2) | |
Text
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south CARUM 4A ELECTRIC a GAS COMPANY CD 9
POST 3FFICE BOX 764 COLUMBIA, SOU1.' CAROLIN A 29218 60
.va~[s,.S E N".cm.
December 29, 1981 9
JA)y4. IOO2 h umaa on..
[g Mr. Harold R. Denton, Director as Office of Nuclear Reactor Regulation C
ft 3
U. S. Nuclear Regulatory Cmmission To
/
Washington, D. C.
20555 4
Subject:
Virgil C. Sumer Nuclear Docket No. 50/395 Technical Specifications
Dear Mr. Der. ton:
In our letter to you dated Decenber 8,1981, a justification of a 1.75%
measurement uncertainty value for reactor coolant flow in Technical Specification 3.2.3 (Page 3/4 2-8) was Irovided. Table 1 of that letter provided the Reactor Coolant loop Flow Calculation. Enclosal is a modified Table 1 with the changes noted.
Please replace the original Table 1 with the new Table 1.
If you have any questions, please let us know.
Very truly yours, T. C. Nichols, Jr.
DGC:'ICN:glb Enclosure cc:
V. C. Sumer T. C. Nichols, Jr.
G. H. Fischer H. N. w W H. T. Babb D. A. Nauman M. B. Whitaker, Jr.
W. A. Williams, Jr.
O. S. Bradham R. B. Clary M. N. Browne A. R. Koon G. J. Braddick J. L. Skolds 0{
J. B. Knotts, Jr.
0 B. A. Bursey h
J. C. Ruoff L. D. Shealy
\\ h\\\\
J. B. Cookinham NPCF File 201050077 811229
. DR ADOCK 05000395 PDR A
~
TABLE 1 REACTOR COOLANT IOOP FILW CALCULATION Ogg + (0 /N - O )] / [hH e
e
-hl Y
W
=
3 p
g 8.02 Where:
W
= Icop flow (GIN) g Q
= Steam generator thermal output (B1U/hr.)
SG Q
= Primary systen net heat losses (BIU/hr.)
N
= Number of loops O
= Reactor coolant pump heat adder (BTU /hr.)
p h
= Hot leg enthalpy (BTU /lb.)
g h
= cold leg enthalpy (BTU /lb.)
C V
= Cold leg _ specific volume (Cu. Ft./lb.)
c (0 /
) = -1.13 x 10 BTU /hr.
3 O
= (h -h)W gg s
f p
Where: h
= Steam enthalpy (BTU /hr.)
s h
= Feedwater enthalpy (BTU /hr.)
p W
p P)
W =KFa (PF p
Where: K
= Feedwater venturi flow coefficient F
= Ebedwater venturi correction for thermal expansion a
P
= Feedwater density (LB./cu. ft.)
p AP
= Feedwater venturi pressure drop (inches H 0) 2 l.
V
.