ML17244A792
| ML17244A792 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 07/26/1979 |
| From: | White L ROCHESTER GAS & ELECTRIC CORP. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| NUDOCS 7908290174 | |
| Download: ML17244A792 (34) | |
Text
l e
~Wm~s.
NCW
~ aug gal e~
~ AND ELECTRIC CORPORATION
~
89 EAST AVENUE, ROCHESTER, N.Y. I4649
, JR.
ENT TELCpHONC ARcA coDK 7I4 546.2700 July 26, 1979 Mr. Boyce H.'rier, Director U.S. Nuclear Regulatory Commission Office of.Inspection and Enforcement Region I 631 Park Avenue King of Prussia, PA 19406
Subject:
Supplemental
Response
IE Bulletin No. 79-07 Seismic Stress Analysis of Safety-Related Piping R. E. Ginna Nuclear Power Plant, Unit No.
1 Docket No. 50-244
Dear Mr. Grier:
On April 25, 1979 we provided you with a response to the subject IE Bulletin.
During subsequent discussions with members of the Region 1, IE Headquarters, and DOR Staff we have been reque'sted to provide additional information concerning our initial response.
Enclosed is a copy of the information requested.
Very truly yours, L. D. Whit
, Jr.
Enclosure xc:
U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement
,Division of Reactor Operations Inspection Washington, DC 20555
Revised
Response
to IE Bulletin No. 79-07 Seismic Stress Analysis of Safety Related Piping R. E. Ginna Nuclear Power Plant, Unit No.
1 Docket No. 50-244 The sections of the A residual heat removal, B main steam, and charging system piping originally analyzed using computer programs which contained algebraic summation of intra-modal responses have been reanalyzed.
The reanalyses have been performed by Westinghouse using the computer code WESTDYN which combines intra-modal responses absolutely.
A detailed description of the reanalysis techniques and the results are contained in Attachment, 1.
Pipe break locations at Ginna Station were not selected based on stress.
Therefore, the new stress analyses do not affect the evaluation of this event.
None of the 3 lines reanalyzed contains any of the Velan check valves involved in the incorrect weight problem identified in IE Bulletin 79-04.
The support loads obtained in the reanalyses
.did not exceed the allowable loads for the existing supports.
Therefore, reanalysis of the supports was not required..
The reanalyses were based on as-built piping system isometrics and support information.
The only inconsistencies found on these lines between the as-built condition and the des'ign drawings were minor differences in support location.
Attachment 1
Revised Response to IE Bulletin No. 79-07 Seismic Stress Analysis of Safety Related Piping R.E.
Ginna Nuclear Power Plant, Unit, No.
1 Docket No.
50 244 Supplementary information to NRC Bulletin 79-07 is provided herein for the Robert Emmett Ginna Nuclear Generating Station, Unit 1.
Information is provided for:
1.
Residual heat removal line Loop A 2.
Main Steam Line Loop B 3.
Charging Line The defined piping/support systems which are analyzed are evaluated incorporating three-dimensional static and dynamic models which include the effects of the supports, valves and equipment.
The static and dynamic analysis employs the displacement
- method, lumped parameters, stiffness matrix formulation and assumes that all components and piping behave in a linear elastic manner.
The response spectra modal analysis technique is used to analyze the piping.
The 1/2% Housner ground response spectrum is employed with zero period acceleration values of 0.08g and 0.2g for the OBE pnd SSE respectively.
This is consistent with the FSAR.
The stress intensification factors due to welds are included in the reanalysis.
1.
Residual Heat Removal Line Loo A
The line analyzed is the residual heat removal system line.from the anchor near reactor coolant Loop A to the containment penetra-tion.
In Table 1 is a comparison of stresses obtained from ADLPIPE and WESTDYN.
In Column 1 are'he results from the 1969 analysis which contained the algebraic sum of intra-modal responses.
In order to have a common basis of comparison, the model employed in 1969 was reanalyzed using the Westinghouse proprietary computer
- code, WESTDYN.
Results are shown in Columns 2 and 3, where the results are combined absolutely and algebraically.
It should be noted that there was no difference in the support load between algebraic and absolute intra-modal combinations.
The stress results reported are obtained using B 31.1-1967, Formula 8.
There is not much difference in the stress results reflecting algebraic and absolute intra-modal combinations.
In Table
-2 is a comparison of stress results for the 1969 model, and the model reflecting as-built conditions. It,should be noted that the 1969 model considered rigid supports, whereas the reanalysis considers both as-built conditions and support stiffnesses.
The stress results reported are obtained using B 31.1-1973 Summer
- Addenda, Formula 12.
Stress allowables given are based on the stress limits given in Appendix 4A, Table 1, of the FSAR.
The analysis reflecting the as-built conditions and support stiffnesses result in support loads below the allowable limits.
This is seen in Table 3.
The.line is seismically qualified.
TABLE 1
SUMMARY
OF MAXIMUM RHR-LOOP A SEISMIC STRESSES
("SSE")*
UNITS-PSI SHOCK DIRECTIONS Vertical
+ Z-Horizontal Vertical
+ X-Horizontal 1969 ADLPIPE 11,602 5,988 1979 WESTDYN**
(2) 11,224 5, 039 197 9 WESTDYN***
(3) 11, 083 4,992
SUMMARY
OF MAXIMUM RHR LOOP A COMBINED STRESSES~
UNITS-PSI COMBINE STRESS 1969 ADLPIPE 1979 WESTDYN**
197 9 ALLOWABLE WESTDYN***
STRESS Maximum Potential Earthquake
("SSE")
+ Normal Pressure
+ Deadweight 17,750 (2) 17,375 (3) 17,235 (4) 28,620
- Results are based on a piping system model representing the 1969 model which considers supports rigid..
- Seismic modal results combined absolutely.
- Seismic modal results combined algebraically.
TABLE 2 RHR-LOOP A STRESS,
SUMMARY
UNITS-PS I Description 1969 Model*
Condition As-Built**
Condition Al1owabl e Stress.
Seismic Stresses OBE Vertical
+ 2-Horizontal Vertical
+ X-Horizontal 3,356 3 ( 900-SSE Vertical.+ 2-Horizontal Vertical
+ X-Horizontal 10,564 5, 674 8,284 9, 716 Combined Stresses OBE
+ Pressure
+ Deadweight 9,436 19,080 SSE
+ Pressure
+ Deadweight 16; 715 15,252
.28,620 Results obtained using WESTDYN.and 1969 model which considers the supports rigid.
- Results obtained using WESTDYN and as-built conditions considering support stiffnesses.
TABLE 3 RHR-LOOP A SUPPORT LOADS*
UNlTS-POUNDS Supports Description As-Built Conditions Design Load RH-34 Vertical OBEVertical
+ Z-Horizontal Vertical
+ X-Horizontal SSEVertical
+ Z-Horizontal Vertical
+ X-Horizontal 2820 2720 3370 3110 3600 5400 RH-8 Vertical OBEVertical
+ Z-Horizontal Vertical
+ X-Horizontal SSEVertical
+ Z-Horizontal Vertical
+ X-Hori'zontal 1110 1260 1340 1680 1680 2520 RH-7 Vertical OBEVertical
+ Z-Hoxizontal Vertical
+ X-Horizontal SSEVertical
+ Z-Hoxizontal Vertical
+ X-Horizontal 1080 1090
.'1'200
'1220 2160 3240 RH-6 Horizontal OBEVertical
+ Z-Horizontal Vertical
+ X-Horizontal SSEVertical
+ Z-Horizontal Vertical
+ X-Horizontal 990 860
.2390 2030 5640 8460
'*Support load combination is seismic plus deadweight.
TABLE 3 (Cont'd)
RHR-LOOP A SUPPORT LOADS*
UNITS-POUNDS Supports RH-5 Vertical RH-4 Horizontal Description OBEVertical
+ Z-Horizontal Vertical
+ X-Horizontal SSEVertical.+ Z-Horizontal Vertical
+ X-Horizontal OBEVertical
+ Z-Horizontal Vertical
+ X-Horizontal SSEVertical
+ Z-Horizontal Vertical
+ X-Horizontal As-Built Conditions 740 740 930 930 600 780 1390 1850 Design Load 2160 3240 3720 5580 RH-3 Vertical OBEVertical
+ Z-Horizontal Vertical
+ X-Horizontal 1910 1880 2160 SSEVertical Vertical
+ Z-Horizontal
+ X-Horizontal
'2250 2180 3240 RH-2 Vertical OBEVertical
+ Z-,Horizontal Vertical
+ X-Horizontal SSE.
Vertical
+ Z-Horizontal Vertical
+ X-Horizontal 1600 1600 1920 1930 2160 3240
- Support load combination is seismic plus deadweight.
TABLE 3 (Cont'd)
RHR-LOOP A SUPPORT LOADS*
UNITS-POUNDS Supports Description As-Built Conditions Design Load RH-1 Vertical OBEVertical
+ Z-Horizontal Vertical
+ X-Horizontal SSEVertical
+ Z-Horizontal Vertical
+ X-Horizontal 1780 1870 2200 2420 2160 3240 RH-1 Horizontal OBEVertical
+ Z-Horizontal Vertical
+ X-Horizontal SSEVertical
+ Z-Horizontal Vertical
+ X-Horizontal 324 880 780 2150 3720 5580
- Support load combination is, seismic plus deadweight.
e
2.
Main Steam Line Loo B
The line analyzed extends from steam generator 1B to the containment penetration.
Seismic results were originally reported in AEC Docket No. 244, June 9, 1969 submittal pertaining to seismic design of Class I piping.
The dynamic stress results were obtained using the computer code ADLPIPE which contained algebraic summation of intra-modal responses.
A seismic reanalysis of this line has been performed using the Westinghouse proprietary computer code WESTDYN which combines intramodal results absolutely.
It is not possible to directly compare the "old" and "new" dynamic seismic results since the old results are not available.
The WESTDYN dynamic model reflects the as-built conditions as well as the actual support stiffnesses.
The main steam line analyzed was coupled to a reactor coolant loop B model.
In Table 4 is a comparison of stress results from the reanalysis reflecting as-built conditions, support stiffnesses, and the allowable stresses.
The stress results reported are obtained using B 31.1-1973 Summer Addenda, Formula 12.
Stress allowables given are based on the FSAR stress limits given in Appendix 4A, Table 1.
The support loads and steam generator nozzle loads compared to allowables are given in Table 5.
The line is qualified seismically.
TABLE 4 MAIN STEAM LINE-LOOP B STRESS
SUMMARY
UNITS PSI Description AS-BUILT CONDITION Dynamic*
Results Allowable Stress Seismic Stresses OBE Vertical
+ Z-Horizontal Vertical
+ X-Horizontal 965 963 SSE Vertical
+ Z-Horizontal Vertical
+ X-Horizontal
.2373 2238 Combined Stresses OBE
+ Pressure
+ Deadweight 7278 16,440 SSE
+ Pressure
+ Deadweight 8686 24, 660
- Stresses given are obtained using B31.1-1973 Summer
- Addenda, Formula 12.
TABLE 5A MAIN STEAM LINE LOOP BE SVPPORP LOADS*
[KITS-POWD Seismic Supports Description As-Built Conditions Design Ioad Vertical + Z-Horizontal Vertical + horizontal 3040 6930 21,000.
21,000 SSE Vertical + Z-Horizontal Vertical + X-Horizontal 6200 14060 21,000 21,000 Vertical + Z-Horizontal Vertical + X-Horizontal 6140 5260 21, 000 21,000 SSE Vertical + Z-Horizontal Vertical + X-Horizontal 15350 13240 21,000 21,000 TABLE,5B KQN STENCH LINE IOOP B STEAM GKNERATCIR+
NOZZLE LQADS UNI1S, KIPS, IN-KEPS Descript:icn NESKGN LOCAL COORDINATE SYSTEM FX'Y FZ OBE induced load Seismic OBE allowable loads SSE induceR loads Seismic SSE allowable loads 9
2 4
'150 150 150 15 5
4 200 200 200 300,209
'514 5000 5000 5000 649
,279 3.160 7500 7500 7500
- Support load canbination is seismic plus deadweight.
9
3.
Char in Line The lines analyzed extend from charging pumps 1,
2 and 3 to the charging pump discharge filter; and include the 2 and 3 inch dis-charge lines from the filter, and the 3 inch bypass.
A seismic analysis was originally per formed of this line by the M.W. Kellogg Company.
A seismic reanalysis of this line has been performed using the Westinghouse proprietary computer code WESTDYN which combines intramodal results absolutely.
The WESTDYN dynamic model reflects the as-built conditions as well as the actual support stiffnesses.
Xn Table 6 is a comparison of stress results from the reanalysis reflecting as-built conditions, support stiffnesses, and the allowable stresses.
The stress results reported are obtained using B 31.1'1973 Summer
- Addenda, Formula 12.
Stress allowables given are based on the FSAR stress limits given in Appendix 4A, Table 1.
The support loads compared to allowables are given in Table 7.
I The line is seismically qualified.
10
TABLE 6 CHARGING LINE STRESS
SUMMARY
UNITS PSI Description As-Built Condition Allowable Stress DynBFii1c Analysis Seismic Stresses Vertical + Z-Horizontal Vertical + horizontal
.150 245 SSE Vertical + Z-Horizontal Vertical + X-Horizontal 436 638 Canbined Stresses GBE + Pressure
+ Deadweight
.6,941 20,580 SSE
+ Pressure
+ Deadweight
'7,334 30,870 I
Stresses given are obtained using B31.1-1973 Summer Addenda Formula 12.
TABLE 7 CHMGING LINE SUPPORF LOADS*
R1ITS-EGUND Supports S-35 Vertical Description CBE Vertical + Z-Horizontal Vertical + X-Horizontal SSEVertical + Z-Horizontal Vertical + X-Horizontal As-Built Conditions 570 580 620 600 Design Loads 1,500 2,250 S&0 Vertical QBE Vertical + Z-Horizontal Vertical + X-Horizontal SSEVertical + Z-Horizontal Vertical + X-Horizontal 20
,20
.30 30 1,500 2,250 S-135 Vertical S-135 Axial OBE Vertical + Z-Horizontal Vertical + X-Horizontal SSEVertical + Z-Horizontal Vertical + X-Horizontal GBE Vertical + Z-Horizontal
. Vertical + XHorizantal SSEVertical + Z-Horizontal Vertical + X-Horizontal 40 40 40 40 65 65 65 65 8, 850 12,750 8,500
.'12,750
- Support 'load ccmbination is seismic plus deadweight.
12,
TABLE 7(Cont'd)
CHARGING LINE SUPPORT LOADS WITS-POUND Supports S-145 Vertical S-210 Vertical S-210 Axial S-225 Vertical Description OBE Vertical + Z-Horizontal Vertical + X-Horizont;al SSE Vertical + Z-Horizontal Vertical + X-Horizontal QBEVertical + Z-Horizontal.
Vertical + X-Horizontal SSEV~al + Z-Horizontal Vertical + X-Horizontal OBEVertical + Z-Horizontal Vertical + X-Horizontal SSEVertical + Z-Horizontal Vertical.+ X-Horizontal QBE Vertical + Z-Horizontal Vertical + X-Horizontal SSE Vertical + Z-Horizontal Vertical + X-Horizontal As-Built Conditions 10 10 20 20 50 50 50 50 65 65 65 65 10 10 20
'10 Design Loads 1,500 l
2,250 8,500 12,750 8,500 12,750 1,500 2,250 13
TABLE 7(Cont'd)
CHARGING LINE SUPPORT LOADS LHITS-POUND Supports Description As-Built Conditions N 404 Horizontal (2 inch)
OBE Vertical + Z-Horizontal Vertical + X-Horizontal SSEVertical + Z-Horizontal Vertical + X-Horizontal 0
10 10 10 375 562 N 404 Horizontal (3 inch)
OBEVertical + Z-Horizontal Vertical + X-Horizontal SSEVertical + Z-Horizontal 1
Vertical + X-Horizontal 40 40 50 60 375 562 N 405 Vertical (2 inch)
CBE Vertical + Z-Horizontal Vertical + X-Horizorrtal SSEVertical + Z-Horizontal Vertical + horizontal 90
.90 100 100 500 750 14
TABLE 7(Cont'd)
CROOKING LINE SUPPORP LCVKS MITS-POUND Supports Description As-Built Conditions Design Loads N 405 Horizontal (2 inch)
OBE Vertical + Z-Horizontal Vertical + X-Horizontal SSEVertical + Z-Horizontal Vertical + X-Horizontal 20 20 30 30 150 225 N 405 Horizontal (3 inch)
CBE Vertical + Z-Horizontal Vertical + X-Horizontal SSEVertical + Z-Horizontal Vertical + X-Horizontal 210 210 230 230
.1,150 1,725 N 405 Horizontal (3 inch)
OBEVertical + Z-Horizontal Vertical + X-Horizontal SSEVertical + Z-Horizontal Vertical + X-Horizontal 70 70
.80 80 400 600