ML19224D323
| ML19224D323 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 05/24/1979 |
| From: | Linder F DAIRYLAND POWER COOPERATIVE |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| LAC-6317, NUDOCS 7907110385 | |
| Download: ML19224D323 (3) | |
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IbitIItYLitNIb I'OWEft COOPEftitTIVE Ba Groue, Ohconan 54601 May 24, 1979 In reply, please refer to LAC-6317 DOCKET NO. 50-409 Mr. James G.
Keppler Regional Director U.
S.
Nuclear Regulatory Commission Directorate of Regulatory Operations Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137
SUBJECT:
DAIRYLAND POWER COOPERATIVE LA CROSSE BOILING WATER REACTOR (LACBWR)
PROVISIONAL OPERATING LICENSE NO. DPR-45 IE BULLETIN NO. 79 SEISMIC STRESS ANALYSIS OF SAFETY RELATED PIPING - SUPPLEMENTAL INFORMATION
Reference:
(1)
NRC Letter, Keppler to Linder, dated April 14, 1979.
(2)
DPC Letter, Linder to Keppler, LAC-6314, dated May 23, 1979.
Dear Mr. Keppler:
The following supplemental information is presented in response to IE Bulletin No. 79-07 enclosed with Reference 1 and in addition to our previous response (Reference 2).
Substitute the following for the last paragraph of page 3 of Reference 2:
"The seismic analysis of these piping systems has been performed using response spectrum modal superposition methods of dynamic analysis.
In the seismic analysis of piping system 1 through 5, the global response summation has been performed using global response summation code 1 (see Attachment B) of the PIPESD computer program.
In this global response summation code, the modal partici-pation factor is formed by the square root of sum of squares method and the horizontal spectra in either the global X-direction or the global Z-direction is applied simultaneously with the vertical spectra in the global Y-direction.
The modal responses are then combined by the square root of the sum of squares smnmation of modal
- ~1 row =8ss X2 3mg
4 Mr. James G.
Keppler LAC-6317 Regional Director May 24, 1979 forces and displacements.
All dynamic load case output quantities are unsigned (absolute value) quantitica.
The seismic analysis of the fuel storage pool drain line piping system has been performed in accordance with the requirements of Regulatory Guide 1.92 (all three directions of earthquake applied simultaneously)."
Add Attachn.ent B to Reference 2.
If there are any further questions concerning this response, please let us know.
Very truly yours, DAIRYLAND POWER COOPERATIVE
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Frank Linder, General Manager FL:RES:af Attachment cc:
U.
S.
Nuclear Regulatory Commission Office of Inspection and Enforcement Division cf Reactor Operations Inspection Washington, D.
C.
20555,
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4 ATTACHMENT B
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Dri'UT DATA CARD:
g-Ear @g:ake loaf czaes DMaurt ON:
W the gichal coordaa** response spectra and s=mmatf o tach:1pw Asr each #munic load rsee.
FORMAT AND EXAMP1.Er 1
2 3
4 5
8 7
8 9
1r
{
M N
g y
g EQ 1
3 3
3 2A.
344.
333.
95 FIELD CONTENT 3
.a LID IM case ide:W' tar (htraer 2 0).
& S "E
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N respecitrah (Intagers 2 0).
Sx. #y. #g M=S~"'- W to be app!!ad to trae A Y, z direction spectra W W (HesI) gf 0 or blar.k.1.0===mq H
IC Moda3 lere! -==h coas (Esal)
O - Spara root of tbs suza of aquarea==
=h of modal forces and WNts (SQSS) 1 - Dtred =mmatica cf mnant,~pGw (DIEIX:7)
O<SC< 1 - Ciceeb spaced frequency -""ma%
N ratio of increasha W= f 41 121*ee than sc g
4 3y wen. d7 sm,==a tf reno t sr.amr ttu aC t 3 d gg [p ";$, tL, a.a., WTAI. =A +
+ R +f[...etc., 21 D,3 g
- d7xnazer md,a
]
v 3
3 mas f are ciceek spaced fra;:a* (CEF).
4 IND G1ctal.m amwm*fina code
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0 - Fona peWW factor by abookste smag comUer E Y, E spectra to act str=W-A.
-- =ce=
1 - Forma psMh factor ty agaare root surzn of squareas eossider spectra to act ewy.
2
-% Y, E spectre to set esparatsh. om.
e:en! % etat Y, and toemt z ty erset a-h 8 - O* 4 Y, E spoetra separatsy. thmhtne total A toest y, eseal s ty esps +
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a.
EmAWM
$d 1.
ca. -- :m emeters Qp,) to ocamt treen cae sistam d==Its to ensther.
s.
M 12D vahas asset to makpe anS ta the resage 15 LID 5 IJtAL samme LMAX ts (be total e-mkr cf Iond casse (statto + & nan.1o). 'Ibs #aando load case 12D maast be di2ersat froom any static 3 cad ease LID.
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