ML17254A971
| ML17254A971 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 09/27/1984 |
| From: | Kober R ROCHESTER GAS & ELECTRIC CORP. |
| To: | Paulson W Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML17254A972 | List: |
| References | |
| NUDOCS 8410100536 | |
| Download: ML17254A971 (7) | |
Text
~
l go,ea, REGULATORY
<FORMATION DISTRIBUTION SY
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ACCESSION NBR;8410100536 DOC ~ DATE: 84/09/27 NOTARIZED:
NO DOCKET FACIL.:50 244 Robert Emmet Ginna Nuclear Planti Unit 1E Rochester G
05000244 AUTH BYNAME AUTHOR AFFILIATION KOBERER ~ le Rochester Gas K Electric Corp.
'EC IP ~ NAME RECIPIENT AFFILIATION PAULSONEN ~ A, Operating Reactors Branch 5
SUBJECT; Forwards Rev 2 to "Mechanical Analysis Spent Fuel Storage Racks Modified to 100X Storage Densityi" in response to NRC questions re 840402 application for amend to License DISTRIBUTION CODE:
AOOI COP ECEIVED:LTR ENCL SIZE:
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TITLE!
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Ge eral Di s tr ibut i on NOTES;NRR/DL/SEP
- 1cy, OL: 09/19/69 05000244 RECIPIENT ID CODE/NAME NRR ORB5 BC 01, INTERNAL: ADM/LFMB NRR/DE/MTEB NRR/DL/ORAB NRR/DSI/RAB RGNl COPIES LTTR ENCL 7
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1 RECIPIENT ID CODE/NAME ELD/HDS4 NRR/DL D IR B
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1 EXTERNAL; ACRS NRC PDR NTIS NOTES:
09 02 6
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,t AN0I'iiiiirl)ll'llllirliiiiiti'i SSASC ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHESTER, N.Y. 14649-0001 ROGER W. KOBER VKE PRESIDENT ELECTSUC 6 STEAM PROOVCTSON TCLSPHONC AiscA coos Tse 546-2700 September 27I 1984 Director of Nuclear Reactor Regulation Attention:
Mr. Walter A. Paulsoni Acting Chief Operating Reactors Branch No.
5 U.S. Nuclear Regulatory Commission Washington'.C.
20555
Subject:
Responses to NRC Staff Questions R. E. Ginna Nuclear Power Plant Docket No. 50-244
Dear Mr. Paulson:
In response to NRC staff questions concerning our Application for Amendment to Operating License dated April 2i 1984i attached is a mechanical analysis of peak weld stresses.
The allowables for peak stresses referenced in the attached analysis are based upon Appendix D of Section 3.8.4 of the Standard Review Plan.
The NRC staff has requested that the allowable stresses be based upon the OT Position Paper revised January 18'979.
Attached is a table showing a comparison of peak stresses to these allowables.
The major difference between the two is that the acceptance criteria for the D+L+(OBE) loading conditions are the normal limits of the ASME Code Subsection NF rather than service limit B which allows for a 1/3 increase in allow'able stresses.
Note that although the margins of safety have decreasedi all are still positive.
V r truly yours>
Ro r W. Kober 84ioi00536 840927 PDR ADOCK 05000244 P'DR
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TABLE 3.7
SUMMARY
OF STRESSES (BASED ON OT POSITION PAPER ALLOWABLES)
REF.
STRESS LOAD STRESS ALLOWABLE MARGIN COMPONENT SECT.
TYPE (KSI)
(KSI)
SAFETY*
Internal'Rack Weld E-W Plane (Fig. 3.1) 6.3 Shear Tension Shear Tension STD.
OBE SSE 8.63 12.71 10.13 14.36
,20. 5
- 21. 0 28.7 33.6
+1.38
+0.65
+1.83
+1.34 Internal Rack Weld N-S Plane (Fig.
3 '. 2) 6.4 Shear Tension Shear Tension Shear Tension Shear Tension CONS.
OBE SSE 11.39 15.64 12.81 17.86
- 10. 60 13.90 11.13 15.59 i20. 5
- 21. 0 28.7 33.6
~'20. 5
)20.5'8.7 28.7
+0.80
+0.34
+1.24
+0.88
+0.93
+0.47
+1.58
+0.84 Shear Tension Shear Tension CONS.
OBE 12.94 16.41 SSE 14.96 19.80 i20
~ 5
+0.58
',20.5
+0.25 28.7
+0.92 28.7
+0.45 Internal Rack Weld 6.5 Shear Shear STD.
+1-19 28.7
+1.65 Box Wall Buckling 6 '
Shear Shear Comp.
Comp.
Comp.
Comp.
CONS.
- 10. 26 12.86
- 9. 03
- 10. 45
- 9. 91 12.42
."20. 5 28.7 13.5
- 13. 5
- 13. 5 13.5
+l.00
+1.22
+0.49
+0.29
+0.36
+0. 09 September 27, 1984, f
tl),
TABLE 3-7
SUMMARY
OF STRESSES (BASED ON OT POSITION PAPER ALLOWABLES)
REF.
STRESS LOAD STRESS ALLOWABLES MARGIN COMPONENT SECT.
TYPE (KSI)
(KSI
)
SAFETY*
Floor Plate Concrete 7.2 Bearing STD.
OBE SSE 1.70 1.96 1.86 2.34 2.1 3.40 2.1 3.40
+0. 23
+0,. 73
+0.13
+0.45 ALLOWABLE STRESS COMPUTED STRESS September 27, 1984