ML20052C021
| ML20052C021 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood, 05000000 |
| Issue date: | 04/26/1982 |
| From: | Tramm T COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 3984N, NUDOCS 8205040271 | |
| Download: ML20052C021 (4) | |
Text
!' ^ )s Commonwealth Edison one First National P! ara. Chictgo. Ilknois C2
)
Addr:ss R2 ply to: Post Othc3 Box 767
/ Chicago, Illinois 60690 April 26, 1982
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en Mr. Harold R. Denton, Director
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q Of fice of Nuclear Reactor Regulation l'
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Z Ol h'd g U.S. Nuclear Regulatory Commission g
Washington, DC 20555 F Oi
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$" /Q
Subject:
Byron Station Units 1 and 2 X'
& :7,j b
Braidwood Station Units 1 and 2 Reactor Vessel Forces and Moments
~
NRC Docke t Nos. 50-454, 50-455, 50-456 and 50-457
Dear Mr. Denton:
This is to provide information regarding forces and moments which would act on a Byron /Braidwood reactor vessel during a design basis loss of coolant accident.
Review of this information should close Outstanding Item 11 of the Byron Safety Evaluation Report.
Enclosed are three figures containing the reactor vessel forces and moments which are due to pressurization of the reactor cavity in a design basis cold leg break.
The nodal representation used in this analysis is the same as that documented in the FSAR for other pressurization calculations.
Please address questions regarding these figures to this One signed original and fifteen copies of this letter are provided for your use.
Very truly yours, jt kWApu --
T. R.
Tramm Nuclear Licensing Administrator 1m
Enclosures:
Figure 1 - RPV Forces at Elevation 393'-0" in the X and Y directions vs. time.
Figure 2 - RPV Forces at Elevation 393'-0" in the Z direction vs. time.
O; Figure 3 - RPV Moments about Elevation 393'-0" in the X and Y directions vs. time.
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L.' Kripps - Energy Incorporated 3984N 8 20 5 040 a-N
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2200.
2200.
h 2000.
2000.
1800.
1800.
FORCF IN X-DIRECTION
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7 1200.
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0.00 0.02 0 04 0.06 0 08 0 10 0 12 0 14 0 16 0 18 0 20 TIMECSECONDS)
FIGURE 1 -
RPV FORCES AT ELEVATION 393'-O' IN THE X AND Y DIRECTIONS VS, TIME
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300..
.. 280.2
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0.00 0.02 C.04 0 06 0 08 0 10 0.12 0 14 0 16 0.18 0 20 TIME (SEC8NOS)
FIGURE 2
- RPV FORCES RT ELEVRTION 393 '-0*
IN THE Z - DIRECTION VS, TIME 4
-n.
1000.,
. 1000.
-l 500.2
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500.
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,1 W OMENT IN X-DIRECTION l\\
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5 l
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M0 MENT IN Y-DIRECTION E
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y T -1000.-
k
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Y
--1000.
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l
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--2000.
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x -2500.-
1, I
h-2500.
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z
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x 1
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-4000.
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Y i
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si F
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--4500.
Y My 4
w
-5000. ~
-5000.
0.00 0 02 0 04 0 06 0 08 0.10 0 12 0 14 0 16 0 18 0 20 j
TINE (SECONOS)
FIGURE 3 - RPV MOMENTS RBOUT ELEVRTION 393 '-O' l
IN Tile X AND Y DIRECTIONS VS, T;i!E L
i A