ML19269D409
| ML19269D409 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 05/01/1979 |
| From: | Jeffery Grant TOLEDO EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 1-63, NUDOCS 7906020240 | |
| Download: ML19269D409 (12) | |
Text
'5MRb 1
04/CAi May 1, 1979 RXEDO
%me EDISON Docket No. 50-346 JAMES S. GRANT License No. NPF-3 va P"$*"
Energy Supp,
(419) 2',9 *;237 Serial No. 1-63 Mr. James G. Keppler Regional Director, Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Dear Mr. Keppler:
This letter is in response to IE Bulletin No. 79-04 dated March 30, 1979, regarding weights used in pipe stress analyses for Velan 3", 4" and 6" swing check valves at Davis-Besse Nuclear Power Station Unit 1.
In accordance with IE Bulletin No. 79-04, the following investigation has been performed to identify the valves in question and the weights used in seismic category I stress analyses:
1.
All Velan check valves on Unit I were obtained under specification 7749-M-212Q. Using the Unit 1 Quantity Tracking System Log all 3",
4",
and 6" check valves pertinent to this study were identified as
.isted on Attachment 1.
The line number and piping class summary sheets were used to determine seismic category I piping systems based on the following criteria:
Category I - Entire line is seismic category I Category I/II - Part of the line seismic category I, balance of line non-seismic.
Exact boundary to be determined from relevant piping isometric and stress problems.
The seismic category is shown in column 10 of Attachment 1.
Valves listed as in seismic category I/II lines are located in the seismic category I portions of those lines.
2.
All the affected stress problems were checked to ensure that the weights of the valves used in the analyses are the same as shown on the latest Velan drawings for the corresponding valves. The Velan Engineering Corporation was contacted to confirm that the valve weights as shown on Velan drawings currently in project files are correct. They have confirmed this to be correct by telecon on April 17, 1979. Written confirmation was received on April 30, 1979.
7 19T9 THE TOLEDO EDISON COMPANY EDISON PLAZA 300 MADISON AVENUE TOLEDO, OHIO 43652 7 90602 o;tya
e
. 3.
By comparing weights as shown on the design drawings against the weights used in the stress analyses, six (6) valves as listed below were shown to have used preliminary weights which differed from the final weights and which were reanalyzed for this change.
Vendor Weight Item Drawing Used In ISO Problem Number Weight Analyses Syy' 3m Number Number 365-36 90 lbs.
60 lbs.
RL 138 240C 78B B6-1 150 lbs.
400 lbs.
HP-22 233D 53 B129-1 120 lbs.
78 lbs.
WM-35 207B 64J B26-1 405 lbs.
300 lbs.
HP-10 233B 32D B49-4 405 lbs.
200 lbs.
WM-8 233A 125Q B49-5 405 lbs.
200 lbs.
WM-10 233A 125Q 4.
The five (5) problems listed in item 3 were reanalyzed with the correct valve weights. The stresses in the piping systems with the revised valve weights did not exceed the code allowables. shows a comparison of the actual total support loads with the correct valve weights versus the load for which the supports had been designed. As evident from Attachment 2, the support design loads were more than the actual load in all but eight supports as identified by at asterisk. The supports were reanalyzed with the actual loads and were found adequate.
Sufficient margins had been provided in the original design of the supports to maintain stresses below allowable values. All the anchors (identified by an asterisk) where the actual load was greater than the design load were checked. Sufficient margins had been provided in the original design of the anchors to maintain stresses below allowable levels.
5.
Bechtel computer program ME-101 was used to determine the pipe stresses and support loads indicated in item 4.
The program is a linear elastic analysis finite element piping program which is capable of performing static analysis and normal mode dynamic analysis techniques. Both techniques were used in this study.
6.
Not applicable.
Very truly yours, 2260 321 h,,,-. w,.-
Enclosures cc:
U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Operations Inspection Washington, D. C.
20555 bt a/1-5
May 1, 1979 Docket No. 50-346 Page 1 of 3 License No. NP F-3 Serial No. 1-63 Analysis Weights of 3", 4" & 6" Velan Check Valves 1
2 3
4 5
6 7
8 9
10 11 12 Velan Spec Vendor Dwg.
Dwg.
Valve Seismic Problem Analysis Item #
Descrip Dwg.
No.
Wt.
Location P&ID #
Line #
Iso #
Class Wt.
B47-1 3"-150#-SS M212-5 P3-1012-N-5 90#
HP33 M-033 IICC-37 233D I,II 56C 90#
B65-36 3"-150#-SS M212-5 P3-1012-N-5 90#
RC138 M-038 IISC-73 240C I,II 78B 60#
B65-36 3"-150#-SS M212-5 P3-1012-N-5 90#
WM47 M-038 HSC-29 238 I,II 124A 90#
B65-35 3"-150#-SS M212-5 P3-1012-N-5 90#
RCl33 M-040-A HSC-73 240C I,II 78E 90#
B65 3"-150#-SS M212-5 P3-1012-N-5 90#
WM177 M-039-1 HCC-53 210F I,II 102K 90#
B88-1 3"-150#-CS M212-2 P3-1012-N-1 90#
SW83 M-041 HBC-44 24111 I
84D 90#
B88-2 3"-150#-CS M212-2 P3-1012-N-1 90#
SW85 M-041 HBC-44 241H I
84D 90#
B88-3 3"-150#-CS M212-2 P3-1012-N-1 90#
SW99 M-041 IIBC-44 24111 I
84D 90#
B88-4 3"-150#-CS M212-2 P3-1012-N-1 90#
SW101 M-041 IIBC-44 241H I
84D 90#
B88-5 3"-150#-CS M212-2 P3-1012-N-1 90#
SW107 M-041 HBC-44 241H I
84E 90#
B6P-6 3"-150#-CS M212-2 P3-1012-N-1 90#
SW109 M-041 HBC-44 24111 I
84E 90#
B88-7 3"-150#-CS M212-2 P3-1012-N-1 90#
SW115 M-041 HBC-44 24111 I
84F 90#
B88-8 rsj 3"-150#-CS M212-2 P3-1012-N-1 90#
SW117 M-041 IIBC-44 24111 I
84F 90#
N B93-1 C7s 3"-1500-CS M212-33 P3-1012-N-24 105#
IIP 30 M-033 CCB-12 233D I
54A 105#
CD B99-1 3"-150#-SS M212-5 P3-1012-N-5 90#
BW14 M-035 HCC-16 235B I
93F 90#
e,,
B99-11ff3"-150#-SS M212-5.
P3-1012-N-5 90#
WC212 M-037A HSC-145 246C I,II 96C 90#
May 1, 1979 Docket No. 50-346 Page 2 of 3 License No. NPF-3 Serial No. 1-63 Analysis Weights of 3", 4" & 6" Velan Check Valves 1
2 3
4 5
6 7
8 9
10 11 12 Velan Spec Dwg.
Dwg.
Dwg.
Valve Seismic Problem Analysis Item Descrip Dwg.
No.
Wt.
Location P&ID #
Line #
Iso #
Class Wt.
B99-13 3"-150#-SS M212-5 P3-1012-N-5 90#
WM22 M-039 HSC-145 246B I,II 96B 90#
B99-8 3"-150#-SS M212-5 P3-1012-N-5 40#
WM41 M-039 HSC-145 246B I,II 96B 90#
B103-1 3"-1500#-SS M212-33 P3-1012-N-24 105#
MU179 M-031 CCB-15 231D I,II 69C 105#
B104-1 3"-150#-CS M212-2 P3-1012-N-1 90#
CC180 M-040 HBB-4 326F I,II 127B 90#
B104-2 3"-150#-CS M212-2 P3-1012-N-1 90#
CC181 M-040 HBB-4 326F I,II 127B 90#
B104-3 3"-150#-CS M212-2 P3-1012-N-1 90#
CC280 M-C40 HBB-4 326F I,II 127B 90#
B104-6 3"-150# CS M212-2 P3-1012-N-1 90#
CC281 M-040 HBB-4 326F I,II 127B 90#
B104-4 3"-150#-CS M212-2 P3-1012-N-1 90#
CC380 M-040 HBB-4 326F I,II 127D 90#
B104-7 3"-150#-CS M212-2 P3-1012-N-1 90#
CC381 M-040 HBB-4 326F I,II 127D 90#
B104-5 3"-?50#-CS M212-2 P3-1012-N-1 90#
CC480 M-040 HBB-4 326F 1,II 127D 90#
B104-8 3"-150#-CS M212-2 P3-1012-N-1 90#
CC481 M-040 HBB-4 326F I,II 127D 90#
B6-1 4"-1500-SS M212-33 P3-1012-N-24 150#
HP22 M-033 CCB-2 233D I
53 400#
B6-2 4"-1500-SS M212-33 P3-1012-N-24 150#
HP23 M-033 CCB-2 233D I
54 150#
N B68 rs) 4"-150#-SS M212-5 P3-lCl2-N-5 120#
DW549 M-010B HCC-40 210E I,II 102I 120#
CN B68 C3 4"-150#-SS M212-5 P3-1012-N-5 120#
WM39 M-039 HCC-49 246A I,il 93C 120#
B129-f (' 4"-150#-SS f]
M212-5 P3-1012-N-5 120#
WM35 M-039 HCC-60 207B I
64J 78#
B137-1 4"-150#-CS M212-2 P3-1012-N-1 110#
CC210 M-029A HBB-15 229 I
Il9G 110#
May 1, 1979 Docket No. 50-346 License No. NPF-3 Page 3 of 3 Serial No. 1-63 Analysis Weights of 3", 4" & 6" Velan Check Valves 1
2 3
4 5
6 7
8 9
10 11 12 Velan Spec Dwg.
Dwg.
Dwg.
Valve Seismic Problem Analysis Item Descrip Dwg.
No.
Wt.
Location P&ID #
Line #
Iso #
Class Wt.
B137-2 4"-150#-CS M212-2 P3-1012-N-1 110#
CC209 M-029A IIBB-15 229 I
119L 110#
B26-1 6"-300#-SS M212-6 P3-1012-N-6 405#
llP)0 M-033 GCB-4 223B I
32D 300#
B26-2 6"-300#-SS M212-6 P3-1012-N-6 405#
!!P11 M-033 GLB-4 233B I
32A 405#
B49 6"-150#-SS M212-6 P3-1012-N-6 405#
WM1 M-039 IISC-32 235A I,II 61X 405#
B49 6"-150#-SS M212-6 P3-1012-N-6 405#
WM4 M-039 11SC-122 233A I,II 93E 405#
B49-4 6"-130#-SS M212-6 P3-1012-N-6 405#
WM8 M-039 11SC-122 233A I,II 125Q 200#
B49-5 6"-150#--S S M212-6 P3-1012-N-6 405#
WM10 M-039 IISC-122 233A I,II 125Q 200#
B118-1 6"-150#-CS M212-7 P3-1012-N-7 405#
SW217 M-041 IIBC-45 24111 I
63A 405#
Bil8-2 6"-150#-CS M212-7 P3-1012-N-7 405#
SW218 M-041 IIBC-45 24111 I
63A 405#
N N
Ch CD tj N
4
May 1, 1979 Docket No. 50-346 License No. NPF-3 Page 1 of 7 Serial No. 1-63 DAVIS-BESSE UNIT 1 - JOB NO. 7749 VELAN CHECK VALVES TABULATION OF HANGER LOADS Problem 78 B - Issue No. 5 - Iso. No. 240C Hanger Loads Data Point Rigid or Spring Design Load Actual Load 105 Rigid 500 269 120 Rigid 500 266 137 Rigid 400 170 157 Rigid 500 313 165 Rigid 500 336 202 Rigid 500 244 210 Rigid 400 137 220 Rigid 400 174 230 Rigid 500 220 245 Rigid 400 116 325 Rigid 800 727 375 Rigid 1000 610 425 Rigid 1000 730 430 Spring 600 350 480 Rigid 800 257 520 Rigid 400 162 Restraint Loads Data Point Rigid or Snubber Design Load Actual Load 105 Rigid 400 192 120 Rigid 400 222 137 Rigid 400 292 157 Rigid 500 240 165 Rigid-X 500 230 165 Rigid-Z 500 248 210 Rigid 500 227 228 Rigid 400 42 230 Rigid 500 181 248 Rigid 600 285 255 Rigid 300 85 268 Rigid 400 363 325 Rigid 400 159 382 Rigid-X 400 350 382 Rigid-Z 600 310 417 Rigid 400 240 425 Rigid 900 670 455 Rigid-X 300 40 455 Rigid-Z 500 291 460 Rigid-X 400 236 460 Rigid-Z 400 210 480 Rigid 1200 148 520 Rigid 500 221 2260.25
May 1, 1979 Docket No. 50-346 License No. NPF-3 Serfal No. 1-63 Page 2 of 7 Problem 78 B (Continued)
Anchor Loads Data Point 91 Fx,1b Fy Fz Mx,ft-lb My Mz Design Load 800 800 300
' 500 900 400 Actual Load 534 533 90 1226 588 191 Data Point 200 Design Load 500 500 700 600 800 300 Actual Load 200 219 185 247 447 90 Data Point 510 Design Load 600 600 700 600 1800 1700 Actual Load 514 560 622 506 1742 1646 2260 326
May 1, 1979 Docket No. 50-346 License No. NPF-3 Serial No. 1-63 Page 3 of 7 Problem 53 - Issue No. 1 - Iso. No. 233 D Hangers Data Point Rigid or Spring Design Load Actual Load 26 Rigid 3190 2854 68 Rigid 1200 1096 90 Rigid 460 449 95 Rigid 590 506 107 Rigid 480 452 113 Rigid 360 291 130 Rigid 380 450 (*)
Restraints Data Point Rigid or Snubber Design Load Actual Load 27 Rigid 680 764 (*)
67 Rigid 790 701 91 Rigid 420 355 96 Rigid 500 402 108 Rigid 510 496 Anchors Data Point 40 Fx,1b Fy Fz Mx, ft-lb My Mz Design Load 320 850 670 2350 1010 2850
(*)
(*)
Actual Load 415 798 608 2144 1033 2814 Data Point 140 Design Load 1700 700 1000 1600 5600 1300 Actual Load 1463 479 891 1561 4869 954 2260 j27
May 1, 1979 Docket No. 50-346 Page 4 of 7 License No. NPF-3 Serial No. 1-63 Problem 64 J - Issue No. 2 - Iso. No. 207B Hangers Data Point Rigid or Spring Design Load Actual Load 25 Rigid 800 515 35 Rigid 900 631 55 Rigid 700 359 70 Rigid 500 276 80 Rigid 700 421 85 Rigid 500 272 100 Rigid 800 561 137 Spring 729 747 (*)
180 Rigid 400 169 250 Rigid 900 606 270 Rigid 1100 794 278 Rigid 700 432 285 Rigid 600 290 Restraints Data Point Rigid or Snubber Design Load Actual Load 15 Rigid 700 483 35 Rigid 700 567 54 Rigid 1200 945 80 Rigid-X 900 642 80 Rigid-Z 500 247 123 Rigid 1100 894 163 Rigid 400 18 181 Rigid 400 47 215 Rigid-X 1100 937 215 Rigid-Z 700 512 240 Rigid 700 448 245 Rigid 700 434 277 Rigid 700 474 Anchors Data Point 5 Fx,1b Fy Fz Mx,ft,1b My Mz Design Load 600 700 400 700 4400 1500 Actual Load 356 436 113 362 3572 956 Data Point 105 Design Load 700 900 1000 4300 3700 1300 Actual Load 456 614 757 3706 3203 1075 21260 ;28
May 1, 1979 Docket No. 50-346 License No. NPF-3 Serial No. 1-63 Page 5 of 7 Problem 64 J (Continued)
Data Point 195 Design Load 700 800 500 500 1700 4100 Actual Load 427 552 245 260 1401 3439 Anchors Data Point 300 Fx,1b Fy Fz Mx,ft-Ib My Mz Design Load 4100 2800 2900 700 8900 5400 Actual Load 3519 2355 2494 425 7613 4635 Data Point 200 Design Load 2400 2200 1500 3000 2600 4800 Actual Load 2246 1877 1094 2173 2552 4550 2263 29
May 1, 1979 Docket No. 50-346 License No. NPF-3 Serial No. 1-63 Page 6 of 7 Problem 32 D Issue No. 3 Iso. No. 233 B Hangers Data Point Rigid or Spring Design Load, Ib Actual Load 120 Rigid 4100 3711 170 Rigid 1200 1344 (*)
265 Spring 389 390 (*)
280 Rigid 600 368 350 Spring 1781 1780 385 Rigid 800 457 368 Spring 365 365 Restraints Data Point Rigid or Snubber Design Load, Ib Actual Load 124 Snubber 1400 1320 130 Rigid 1900 1955 (*)
140 Rigid 1400 724 215 Rigid 600 325 247 Rigid 1200 899 265 Rigid-X 400 43 265 Snubber-Y 400 276 275 Rigid 800 637 278 Rigid 400 106 350 Snubber-X 257 257 350 Snubber-Y 1000 87 350 Rigid-Z 1100 970 385 Rigid
- 1000, 799 Anchors Data Point 145 Fx,1b Fy Fz Mx,ft-Ib My Mz Design Load 500 2000 8000 13400 2000 3800
(*)
(*)
Actual Load 457 1974 8032 13461 1913 3787 Data Point 310 Design Load 300 200 400 1100 700 200 Actual Load 260 172 397 1073 630 164 Data Point 85 Design Load 5600 9800 4900 24600 37900 8000 Actual Load 4789 8607 4460 23175 33042 6535 2260 330
May 1, 1979 Docket No. 50-346 License No. NPF-3 Serial No. 1-63 Page 7 of 7 Problem 125 Q - Issue 01 - Iso. No. 233A Hanger Loads Data Point Rigid or Spring Design Load Actual Load 15 Rigid 4800 4161 35 Rigid 800 568 45 Rigid 700 528 80 Rigid 1300 1654 (*)
155 Rigid 1200 1450 (*)
Restraint Loads Data Point Rigid or Snubber Design Load Actual Load 20 Rigid-X 600 355 20 Rigid-Z 700 460 25 Rigid-X 700 489 25 Rigid-Z 700 406 32 Rigid 600 230 138 Rigid 700 636 2260 231