ML20239A241

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Informs of Plans to Replace Seven Hydraulic Snubbers W/Five Energy Absorbers on Main Steam Bypass Line During Fall 1987 Outage.Fee Paid.W/Two Oversize Drawings.Drawing Change Notices Encl
ML20239A241
Person / Time
Site: Point Beach  NextEra Energy icon.png
Issue date: 09/10/1987
From: Fay C
WISCONSIN ELECTRIC POWER CO.
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20239A243 List:
References
CON-NRC-87-93 VPNPD-87-390, NUDOCS 8709170202
Download: ML20239A241 (13)
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Text

{{#Wiki_filter:-- f l Wisconsin Electnc eowca coueur 231 W. MICHIGAN. P.O. BOX 2046, MILWAUKEE.Wl 53201 (414)277 2345 VPNPD-87-390 NRC-87-93 September 10, 1987 CERTIFIED MAIL -U. S. NUCLEAR REGULATORY COMMISSION Document Control Desk Washington, D.C. 20555 Gentlemen: ' DOCKET 50-301 ENERGY ABSORBER APPLICATION POINT BEACH NUCLEAR PLANT, UNIT 2 on May 13, 1986, Wisconsin Electric proposed the use of energy absorbers as replacements for hydraulic snubbers in selected locations at the Point Beach Nuclear Plant (Reference 1). After receiving responses to requests for additional information, and after conducting an independent analysis through Brookhaven National Laboratory, the.U. S. Nuclear Regulatory Commission approved the use of energy absorbers on the-main steam bypass line in Unit 1 on April' 10,~1987. The" Safety Evaluation Report which provided that approval (Reference 2) ' stated that the NRC approval did not extend to systems at Point Beach Nuclear Plant other than the one specifically. addressed in the SER, but rather that future proposed applications of energy absorbers would have to be reviewed on a case-specific basis. The purpose of this letter, in compliance with the SER requirements, is to inform the NRC of our plans to replace seven hydraulic snubbers with five energy absorbers on the main steam bypass line in Unit 2 during the fall 1987 outage. The fall 1987 Unit 2 outage is scheduled to begin on October 2, 1987, and last through November 13, 1987. To aid the NRC's review process, the following information is provided. 1. The intended Unit 2 system for energy absorber application, the main steam bypass line, is the same system as in the Unit 1 application. \\ 8709170202 870910 Y, PDR ADOCK 05000301 CUlCgcGil $$%O c

l l iP j I n -l I NRC Document Control Desk

September'10, 1987 i

'Page 2-l . The Unit 2 system with energy, absorbers as' replacements j "2. for hydraulic snubbers has been' analyzed.with the same analysis. methodologies, ME 101 computer program, response' spectra, and other pertinent input data as those used in the'analysisfof the Unit 1. system. A-summary-of the Unit 2 analysis results is attached, along with similar results from the Unit 1 analysis. Specifically, modal damping comparison. sheets, stress summary sheets, and support load summary sheets for Units 1 and 2;are attached. A review of the summary of. 3 the results indicates.that the general system responses a of both units with energy absorbers are similar, and that pipe stresses and support loads are within the allowable values. 3. _Although the geometry _and. location of pipe supports of the Unit 2 system are not identical to Unit l ~, they are j similar. A hand-marked copy of Bechtel Drawing P-207 Revision 4 (attached)-shows the pipe routing and-support locations for the main steam bypass line in Unit 2, including the proposed energy absorber locations as assumed in the analysis. For reference l purposes, Bechtel Drawing P-107 Revision 5 is also attached, which shows similar information for Unit 1. l 4. The size, type, and quantity of energy absorbers proposed for Unit 2 are identical to those used for Unit 1. The locations of the energy absorbers on the bypass lines are similar. Seven snubbers will be replaced with five size EA4SS-5 energy absorbers, as follows: Snubber Removed Energy Absorber Installed 2R-EB-2-1 2EA-EB-2-1 2R-EB-2-2 none 2R-EB-2-3 2EA-EB-2-3 2R-EB-2-4 2EA-EB-2-4 I 2R-EB-2-5 2EA-EB-2-5 2R-EB-2-6 2EA-EB-2-6 2R-EB-2-7 none 5. The same design, material, fabrication, and I documentation requirements for the energy absorbers l that were used for Unit 1 will also be applied for Unit 2. These requirements are in accordance with ASME Code I Case N-420. l

NRC Document Control Desk September 10, 1987 Page 3 6. A walkdown of the modified Unit 2 pipe run will be performed and documented to ensure that there are no adverse interactions with adjacent safety-related equipment due to increased piping displacement during a seismic event. 7. The plans for the inservice inspection of the Unit 2 energy absorbers will be identical to those established for the Unit 1 energy absorbers. 8. As explained in Reference 1, the damping ratios, in some cases, exceed the generic system damping ratios used in the original design of the plant. We will amend the PBNP FSAR to include the use of energy absorbers in Unit 2 following installation of the equipment. Pursuant to the requirements of 10 CFR 170.21, we understand that this approval is subject to a $150 application fee. Our check in this amount payable to the U.S. Nuclear Regulatory Commission is enclosed. The replacement of hydraulic snubbers with energy absorbers will help to reduce extensive inservice inspections, functional testing, and maintenance programs, and will lead to improved system reliability. Please contact us if you require additional information regarding this replacement. Very truly yours, []lJg C. W. Fay Vice President Nuclear Power Enclosures (C:leck 969708) Copies to NRC Regional Administrator, Office of Inspection and Enforcement, Region III; NRC Resident Inspector

,o 4 References 1. WE letter VPNPD-86-207, NRC-86-40, C. W. Fay to H. R. Denton, " Energy Absorbers as Replacements of Snubbers for Seismic Support of Nuclear Piping Systems, Point Beach Nuclear Plant, Units 1 and 2.," dated May 13, 1986. 2. " Safety Evaluation Report, Point Beach Nuclear Plant, Energy Absorbers as Replacements for Snubbers on the Unit 1 Main Steam Bypass Line," dated April 10, 1987. j.

Frequency and Damping Table E10447-1 Rev 1 E10447-2 Rev 0 Unit 1 Unit 2 MODE FRE0VENCY DAMPING FREQUENCY DAM 9fNG (CPS) (CPS) t .878770 .000915 .989545 .024279 2 1.43097% .007825 1.454792 .007512 3 2.046095' .008361 2.067420 .010608 4 2.843989 .149237 2.600829 .199497 5 3.147704 .009118 3.066316 .014033 8 3.374652 .006388 3.373953 .014663 7 3.576698 .015261 3.488080 .043292 8 3.779936 .015309 3.690073 .Oldt13 9 3.868663 .005585 3.803577 .007002 10 4.084570 .007791 3.970704 .070658 11 4.142341 .040550 4.044890 .021857 12 4.283055 .004424 4.224218 .009521 13 4.427533 .038958 4.310199 .029421 14 4.822743 .007231 4.567153 .006529 15 4.880340 .011998 4.778846 .005146 5 18 4.842579 .005529 4.797529 .011666 17 5.069422 .010535 5.070823 .026190 18 5.215758 .005052 5.103079 .005080 19 5.295212 .009447 5.221959 .017277 20 5.394706 .015947 5.683974 .029607 21 5.928893 .009181 6.103676 .025073 22 S.2725t2 .005012 6.188881 .005184 23 8.869975 .005453 6.431302 .126104 24 S.726831 .005487 6.575385 .015608 25 S.893799 .006271 6.665793 .0t37t6 26 7.055527 .012820 6.697287 .033800 27 7.070629 .004413 6.750171 .019867 28 7.2542tt .005039 6.807907 .009352 29 7.7773f2 .005962 6.944361 .015304 30 7.951291 .006002 7.135055 .009828 El 7.963394 .007334 7.547526 .007127 32 S.000143 .004076 7.766350 .005062 33 S.054425 .005564 7.876474 .005029 34 S.065431 .005512 7.906267 .006509 35 S.179608 031069 7.933748 .006911 34 8.256642 .007207 8.035535 .005289 37 8.629948 .028100 8.051839 .008022 38 R.838711 .027876 8.270432 .026833 39 9.114127 004923 9.021654 .005051 40 9.244438 .010010 9.092973 .005281 41 9.416148 .005006 9.20813t .005545 9.255521 .005002 43 g,441054 .02383t 9.278910 .008978 43 9.689922 .Of30tt 44 10.02t197 .041156 9.518209 .005003 9.552832 .005004 45 10.363293 .007257 46 10.526717 .00647t 9.669053 .005004 47 10.529942 .005064 9.936148 .006642 48 10.682812 .005t46 10.157663 .005317 49 10.956527 .006295 10.304387 .006423 50 99.129487 .005541 10.555501 .005088 59 1t.343985 .006905 10.629319 .005004 52 11.479415 .005882 10.840699 .005373 53 11.635248 .005567 10.957784 .013167 11.106060 .020168 B4 12.264657 .027536 11.351072 .005258 55 12.425202 .0123tt 11.451968 .006385 56 12.540336 .005871 11.717530 .006026 57 12.643802 .005413 12.072789 .017955 58 12.944959 .005209 12.200771 .005067 59 13.076190 .005552 12.430283 .010097 60 13.184328 .005003

PIPING STRESS

SUMMARY

CHECK AND COVER SHEET f N8 ANSI.B31.1 SHEET OF rROJECT: POINT BEACH 10447-044 PLANT DESIGN GROUP JOB NO. MAIN STEAM OUTSIDE CONTAINMENT 4 SYSTEM: CALC. NO. _ E 10447 -2 ISO NO. P-207 REV NO. MAXIMUM ALLOWABLE C;i CK:"./ DESIGN PLANT LOCATION CONDITION OPERATING OF MAX. LOADING COMBINATION COMPUTED STRESS PSI .DAT4-STRESS PSI AND [ ANSI CONDITON PIPE STRESS PAR A. REF.) DESIGN PRESS. ATMPSIG 5616 NOR 680 15,000 SUSTAINED LOADS WE10HT & SUSTAINED LOAD 7348 SUM }ggg4 EON.11 DESION PRESS. AT EPSIG 8157 OCCASION AL '[2] UPSET 145 WElGHT & SUSTAINED LOAD 27 4 18,QQQ i CAT 1 MAX. OCCA8'ONAL LOAO-OBE 5228 eon.12 I" " I 4 sum 13659 "4 DESIGN PMESS. AT MPS10 8157 WEl HT & SUSTAINED LOAD 274 27,000 FAULTED 145 CAT 1 MAX. OCCASIONAL LOAD-SSE 10041 I" "l 8 Suu 18472 kh DEsiow PRESS. AT Psio WElGHT & SUSTAINED LOAD OCCASIONAL LOAD. SUM (k = 1 "4 OES40N PRESS. AT1085 Psia 5616 CAT III "" * " AN N 9623 36.000 fN 5 862 y OCCASIONAL LOAD-SSE 18666 OPER-NON-SEISMIC ABILITY) PORTION SA THERMAL EXPANSION THERMAL EXPA $ ANCHOR MOVEMENT (OSE) gyg

  • E QM.13 Dell 1N PRESS. AT 1085.PSio 5616 MAX. OPER THERMAL D60M MIGHT & SUSTAINED LOAD 1062 EXPAN 37.500 THERMAL EXPANSION 26805 ANCHOR MOVEMENT (OBE)

SUM 33483

  • EITHER EON.13 OR EON.14 MUST BE MET REFERENCE CALCULATIONS:

2"O OTHERS: WEl0HT 2-R SEISMIC tlNERTIA PORTION) N/A $ THERMAL EXP. 2-8 SEl5MIC (ANCHOR MOVEMENT) E DATE

SUMMARY

NAME / JilGNATUSE j PREP ARED BY ANDREW YAN MCh B-/ 7-8 7 ' ' Ns/ 4 // d _' 8-2a -M REVIEWED BY KEY CH01 / APPROVED BY CHil Y. CHERN "7 W-

PIPING STRESS

SUMMARY

CHECK AND COVER SHEET ' g. ANSI 831,1 g SHEET Point Beach PROJECT: _ 92N PLANT DESIGN GROUP JOB NO._ Mains h N tside SYSTEM:_ ISO NO. P-107 REV NO. 5 CALC. NO. __4/0 94 7 '/ MAXIMUM ALLOWABLE CHECKER / 0 ' PLANT LOCATION CO DIT ON OPERATING OF MAX. LOADING COMBINATION COMPUTED STRESS PSI DATE STRESS PSI AND(ANSI CONDITON PIPE STRESS PAR A. REF.! DESIGN PRESS. AT1085 Pao M16 SUSTAINED ~

  • 1372 15'000 LOADS wEioHT a SUSTAINED LOAD (10s.S.11 ttxmal 762 sum 12988 EaN.11 I3h DESIGN PRESE. AT19E.5PS40 gig 7 CCCASIONAL

'O'88 wEloHT a SUSTAINED LOAD 464 18,000 ENsf Upset Cat. I Max. OCCASIONAL. LOAD. OBE 6021 5 sum 14642 [K 1.23 \\ A% DESIGN PRESS. AT1031PSIG g7q7 wEl0HT & SUSTAINED LOAD 464 27,000 / Faulted Cat. I Max. OccAStoNAL LOAD SSE 11R2O f Su" 20441 5 DESIGN PRESE. AT PSIG wEl0HT & SUSTAINED LOAD OCCASIONAL LOAD-Ik* 1 SUM k8h l DESIGNPREM. ATIEPSIG gig CAT. III Sys. Max. Fadited 818 wEioHT a SUSTAINED LOAD 6547 36'000 ircluding ocCAStoNAL LOADSSE 19697 Non-seismic M" sum 31860 [K 2.43 SA THERMAL EXPANSION THERMAL ANCHOR MOVEMENT 005E1 I EXPANSION (104.8.3Al SUM

  • EON.13 DESIGN PRESS. AT19$.5 PSlo 5616 THERMAL Max. Oper.

WEIGHT & SUSTAINED LOAD 670 EXPANSION tdETP. 0 f,'d* 'g'I 521 deg.F 6604 Berd THERMAL EXPAN880N 26873 ANCHOR MOVEMENT 40SE) g SUM g3ggg

  • EITHER EON.1'3 OR EON.14 MUST BE MET REFERENCE CALCULATIONS:

N/A 2-21 SElSMIC (INERTIA PORTION). 2-21 OTHERS: wtloHT N/A E THERMALExP. 2-21 SEISMIC (ANCHOR MOVEMENT) DATE E ,. SIGfiATURE

SUMMARY

NAME (M W 9I 3 E h PREPARED BY M. Y. Dong _ %G * } 6 _ O 2f - / 3 - Wr W @ ()V t2_ R / z,I dM" REVIEWED SY H. M. Ice L. E. Shipley f&& r 1s47 Se samtv ne5lW7he-Ws5W Afd NSAub h - APPROVEo SV R 'N S% Wset Mt ____ ____. _ NM M bN P

f.- 1 POINT BEACH GENERATING PLANT MAIN STEAM OUTSIDE CONTAINMENT--CALC E10447-2 REV O -ENERGY ABSORBER APPLICATION SUPPORT IDADS (LBS) r-fo7 DATA HGR LOAD COLD PT TYPE DIR. THRM SPRING WT OBE SSE UPSET FAULTED j

==

120 RAD FX 587 -36 -61 5654 9552 6144 10042 120 RAD FY -8645 26 -11212 1501 3217 21332 23048 130 RAD FX 3455 55 119 9759 17557 13388 21186 130 RAD FY 49007 -262 -3241 2426 4872 47930 50376 140 RAD FY -22820 1113 -32391 9784 18770 63882 72868 144 RAD FZ -5109 2639 137 12891 22015 15667 24791 305 RAD FY -9015 -377 -29793 13726 26197 52911 65382 325 RAD FY 4409 114 -7845 3515 6131 11246 13862 '335 RAD FX 6325 12 60 10513 18489 16910 24886 335 RAD FY -4$83 -102 -9169 2299 4199 16153 18053 340 RAD FX -16305 47 -33 5877 9699 22168 25990 340 RAD FY 2053 57 -20382 1886 3577 22211 23902 l 534 RAD FY -5899 154 -6964 6866 10657 19575 23366 555 RAD FY 5516 -100 -3687 3219 5129 7006 8916 555 RAD FZ 542 1404 -5 2526 5813 4467 7754 575 RAD FY -1856 204 -2836 809 1231 5297 5719 l 580 RAD FY 850 -194 -2865 467 754 3526 3813 l 600 RAD FY -94 33 -3173 438 768 3672 4002 l 603 RAD FY 1325 -290 -5359 375 689 6024 6338 l 630 RAD FX -4401 -126 106 3933 6562 8354 10983 630 RAD FY -212 -363 -1487 811 1085 2873 3147 650 RAD FY 501 192 -2028 692 779 2528 2615 704 RAD FY 302 195 -951 305 490 1061 1246 728 RAD FY 234 158 -1903 720 1014 2465 2759 I 750 RAD FY 528 76 -875 304 493 1103 1292 l 776 RAD FY -9083 -468 -2899 1874 3274 14324 15724 781 RAD FZ 1310 220 76 2541 4880 4147 6486 l 786 RAD FY 2958 203 -2394 923 1645 3114 3836 789 RAD FY 809 -39 ~5538 456 936 6033 6513 l 300 RAD FY -1244 34 -1384 898 1583 3492 4177 l 807 RAD FY 237 -23 -1029 894 1982 1946 3034 f 829 RAD FY 414 -14 -383 484 819 881 1216 l 851 RAD FY 498 -5 -1051 709 1423 1765 2479 l 871 RAD FY 1242 4 -446 457 1399 1257 2199 i 500 EAB FZ 5930 -3303 597 5561 8004 8785 11228 535 EAB FZ -994 0 -61 3967 7088 5022 8143 i 577 EAB FZ 5213 -2508 38 5410 8257 8153 11000 784 'EAB FX ~692 0 273 4319 7509 4738 7928 790 EAB FX 4630 0 -231 2210 6460 6609 10859 l 1 [ j l 4 f

~ d/dV47~/ Xfu o 6 fan'ATURE DATE POINT BEACH GENERATING PLANT Oricinator 7 % fe d K E./J f) MAIN STEAM OUTSIDE CONTAINMENT Checker u 6// 5-ENERGY ABSORBER APPLICATION SUPPORT LOADS (LBS) F-/07 DATA HGR IDADl COLD OBE SSE l UPSET FAULTED l PT TYPE DIR.l THRM SPRING WT

1

._~-_l g ------- 51 120 RAD FX l ~3801 78 4406 8513 l 8078 12185 l 120 RAD FY l -6330 36 -12056 1265 2630 l 19615 20980 l 130 RAD FX l -2695 -66 -184 6168 12031 l 9113 14976 l 130 RAD FY j 41445 -377 -2409 2475 4750 l 41134 43409 l 140 RAD FY l -10469 1456 -30661 9603 18958 l 49277 58632 l 144 RAD FZ l -2571 3639 189 11825 23459 1 15653 27287 l 305 RAD FY l -19158 -726 -29129 13279 27818 l 62292 76831 l 325 RAD FY l 4790 147 -7102 3573 7152 l 10528 14107 1 335 RAD FX l -4470 2 -104 9861 18678 l 14433 23250 l 335 RAD FY l -5275 -139 -10628 2218 4432 1 18260 20474 1 340 W.D FX i 3628 -103 48 3928 7580 l 7501 11153 [ l 340 RAD FY l 2734 96 -10468 1452 2769 l 11824 13141 l 535 RAD FY l -1115 120 -4582 4596 10714 l 10173 16291 l 555 RAD FY l 1605 -109 -4431 1814 4215 l 6354 8755 1 555 RAD FZ l -53 1293 -3 1106 2005 l 2396 3295 l 575 RAD FY l -1411 297 -1857 874 1667 l 3845 4638 l 580 RAD FY l 1305 -328 -3635 642 1360 l 4605 5323 1 600 RAD FY l 133 -18 -8017 1066 2067 l 9101 10102 l 628 RAD FX l 4599 182 -137 2202 4209 1 6846 8853 l 628 RAD FY l 457 -559 -767 1000 1475 l 2326 2801 l 650 RAD FY l 505 201 -1676 560 607 1 2035 2082 l 704 RAD FY l 323 202 -840 305 544 l 943 1182 l 728 RAD FY l 269 163 -1847 478 740 l 2162 2424 l 750 RAD FY l 593 82 -1099 317 643 l 1334 1660 l 776 RAD FY l -2612 -67 -1673 1400 3130 l 5752 7482 l 781 RAD FZ l -3193 1093 -24 2716 5418 l 4840 7542 l 790 RAD FY l 36 -29 ~6126 1843 3383 l 7998 9538 1 800 RAD FY l -717 45 -1231 1283 2008 l 3186 3911 l 80'/ RAD FY l 230 -23 -826 969 1469 l 1818 2318 l 829 RAD TY l 380 -9 -340 567 898 l 916 1247 l 851 RAD FY l 450 6 -817 924 1378 l 1735 2189 l 871 RAD FY l 1143 22 -361 544 1050 l 1348 1854 1 500 EAB FZ l 9601 -4825 599 5269 7636 l 10644 13011 l 535 EAB FZ l 1059 0 ~54 3172 5151 l 4177 6156 l 577 EAB FZ l 5148 -2527 -51 5678 7661 l 8256 10239 l 784 EAB FX l -65 0 -178 2740 4941 l 2983 5184 l 790 EAB FX l -3734 0 214 3006 3965 l 6526 7485 l

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DCn s ??- /LSo 1 1 ~ @ RIGID HANGER 4 SPRING HANGER 4 ANCHOR GUIDE ?* NT ENERGY ABSORBER --w DRAWING CHANGE NOTICE Vendor @e. M tl Job No. IO N Dwg. No. P-107 Sh. _ Rev.O 1 Mod. Req. No. 87- 08/s DCN Originator T hiddent1 Date [o 87_ fM _ Jb IJtfA) ate lo[r[6"7 Tech. Revie Approval 7( hkM e Date[ d 8 4 b Date /(([ Other Rev w Quality Engr. b[sdass= Date E&C No. PB Ol A'7 5 0 0 5 O O b Microfilm 8 6 l.5 A 4 A4 DCN Complete Date Form QP 6-4.1 Rev. 1 _ - - _ - _ _ - _ - _.}}

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