ML18046B177

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Suppl to Rept EGG-EA-5317
ML18046B177
Person / Time
Site: Palisades Entergy icon.png
Issue date: 12/18/1981
From:
LAWRENCE LIVERMORE NATIONAL LABORATORY
To:
Shared Package
ML18046B116 List:
References
CON-FIN-A-0436, CON-FIN-A-436 EGG-EA-5317, NUDOCS 8112290320
Download: ML18046B177 (21)
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{{#Wiki_filter:* SUPPLEMENT TO REPORT EGG-EA-5317 Report EGG-EA-5317 (Reference l) describes the analyses performed on portions of five different piping systems from the Palisades Unit 1 Nuclear Power Plant. This work was in support of the Nuclear Regulatory Commission's Systematic Evaluation Program (SEP). The results described in the Reference l report showed that allowable stresses for the "current criteria" Safe Shutdown Earthquake (SSE) 16ad case were exceeded in the Regenerative Heat Exchanger (RHE) letdown piping model, the auxiliary feedwater piping model number two, and the steam line to the P-8B turbine piping model. Consumer's Power Company (CPCo), the plant owner, and Bechtel Power Corpora-tion subsequently reviewed the data that had been supplied to perform the ana~yses of these pipe lines. A joint meeting of representatives from CPCo, Bechtel, EG&G Idaho, and the NRC ended with the conclusion that certain as built information had not been provided for inclu~ion in the Reference l analyses. The following pages describe the modifications to the three pre-viously mentioned piping models and the resulting conclusions wheh the new information is considered. The* new information for the RHE letdown line indicated that several supports existed in the area of valves CV 2002, CV 2003, CV 2004, and CV 2005. These supports are situated such that axial restraint of the main 30 foot span of RHE piping shown in Reference l will be provided. Drawings of additional piping and supports connecting to the above mentioned valves were also examined. Assuming that this information is indeed accurate, experience and engineerfng judgement were used to conclude that the RHE piping considered in Reference l should not be overstressed during an SSE event. No additional finite.element analyses were performed for this piping. Additional information pertaining to the auxiliary feedwater model number two consi5t primarily of anchorage details. The model contains a six inch nominal size branch line which penetrates a building wall and connects to underground (11112290320 8112185.,. 1 PDR ADOCK 0500025 p PDR

piping. Since no details were known, the model shown in Reference l was termin-,. ated at the wall with a three directional restraint. The new information ~hows that an anchor may be assumed at this wall penetration. Also, the updated drawings showed that stiffer flange elements could be used at the pump connections. These changes were incorporated into the finite element model which is shown in Figure 1. As expected, the increased stiffness from the added anchorage details raised the natural frequencies of the model. The first 10 natural frequencies and periods of vibration for the revised model are shown in Table 1. Table 2 shows the ASME Code, Class 2, equation 10 (occasional loads) stress results for the anchor points and the three highest stressed points on the model. Tables 3 and 4 summarize the revised support and anchor loads, respec-tively. In general, the revised stresses and support and anchor loads were lower than those reported in Reference 1. The NUPIPE-II computer program was used to calculate all results described herein. Both support modifications and anchorage details were included in the additional information for the steam line to the P-88 turbine. The revised finite element model is shown in several parts in Figure 2. Important model changes are listed below:

1.

A three-directional restraint was replaced by an anchor point at an underground wall penetration (node 315).

2.

Support H924A was modified to provide up and down vertical support (Y global direction, node 10).

3.

Support H9 (node 510) was modified to provide both vertical and lateral dynamic support.

4.

Support Hl3 was relocated approximately six feet upstream (from node 655 to node 665).

5.

Support H23A was added (node 970) to limit east-west movement in the area of valves MS 05228 and MS 0522A. 2 3

w Wall Penetration Anchor (To Underground Piping) P-8B Anchor 46 40 30 RV 0783 110 111 11* 10 11 eo

  • o P-8A Anchor 120 122 126 130 140 146 160 Figure l. Palisades Auxiliary Feedwater Piping Model #2
  • LH~l:!HJ *
  • tl"DE L"CA110tl Cl MASSPIJINT l.0CAT ll,11

~ SPRING llAtlGER ic=J-SNUBBER ~~ RI Gill SUPPIJRT ~ ANC110R 11 ELAS1" J01NT ~ FLEXIBLE ANCll0R Ee=i VAL VF y R0TATl011 AB0UT Y*AXI!; X*Z PLAllF TILT \\~

TABLE 1.

SUMMARY

OF FIRST TEN NATURAL FREQUENCIES AND PERIODS OF VIBRATION--AUXILIARY FEEDWATER MODEL NO. 2 f T Mode J.&. {Second) 6.99 0.143 2 13.8 0.073 3

19. 1 0.052 4

21.2 0.047 5 22.9 0.044 6 25.8 0.039 7 28.3

0. 035.

8 33.3 0.030 9 34.9 0.028 10 41.2 0.024 4

TABLE 2. SUMMA.RY OF ASME CODE, CLASS 2 EQUArION 1 0 STRESS VALUES, "CURRENT CRITERIA" ANALYSIS (SSE LOAD CASE)--AUXILIARY FEEDWA TER MODEL NO. 2 Stress (ksi) Node SSE SSE + RV Allowable Comment 5 10.6 12.6 36.o Pump Anchor P-88 160 15.5 18.7 36.0 .Pump Anchor P-8A 205 12.8

13. 1 36.0 Wal 1 Penetration 60 13.5 36.0 El bow 70 14.1 36.0

- H227 A Support .Po int 95 14.1 33.3 36.0 El bow 155 15.0

17. 1 36.0 Tee NOTES:.
1.

2% damping used.

2.

Allowable stress (2.4 SH) based on SH = 15.0 ksi for ASTM A 106 Gr B carbon steel at 450°F.

3.

Equation.10 stresses include the effects of pressure, sustained loads (deadweighti and occasional loads (SSE).

4.

As used in the stress column, RV implies that relief valve discharge loads-were added to the SSE loading. 5

TABLE 3 *. SUPPORT LOAD SUMtt\\A.RY--AUXILIARY FEEDWATER MODEL NO. 2-- SEISMIC LOADS ONLY LOAD ( K) Current 2% Current 2%

  • Node Direction SSE SSE + RV 100 x

0.466 4.47 100 y 0.010 0.018 270 x 0.049 0.125 270 INCL 0.107 0.119. NOTES:

1.

Directions are global axis orientations. 11 Incl 11 implies that the restraint direction is inclined with respect_to the global axes.

2.
  • 11 SSE + RV 11 means that this 1 oad case was a combination of SSE 1 oads plus relief valve discharge loads.

6 7

TABLE 4.. ANCHOR LOAD

SUMMARY

--AUXILIARY FEEbWATER MODEL NO. 2-- SEISMIC LOADS ONLY Current Current Node Direction SSE SSE + RV 5 x 0.229 0.286 y 1.01 1.98 z 1.38 1.47 xx 37.6 47.1. yy 5.57 10.4 zz 4.16 10.9 160 x 0.269 0.600 y 1.96 3.25 z 1.65 1.79 xx 68.2 .84.1 yy 8.48 16.5 zz 4.07 11.8 205 x 0.663 0.984 y 0.304 0.668 z 2.02 2.07 xx 2.86 31.0 yy 68.3 71.6 zz 2.80 4.86 NOTE:

1.

Directions 1 i sted are in the global coordinate system. 11 X 11 implies a force in the global X direction. 11XX 11 implies a moment about the global X axis.

2.

"SSE + RV" means that this 1 oad case was a combination of SSE 1 oads plus relief valve discharge loads. 7

co .I

Match Point A 110

4 Inch Piping HO

  • o

_10,. 10 P-8B

  • /\\nchor Point AUX. FEED-STEAM T0 P-80 NUPIPE MATHEMATICAL M0DEL

"*LEGEND** I N"DE L"CATl"N C!> HASSP"INT L"CATl"N +:./IN-- - SPRING HANGER 4=J-SNUBBER ~ RIGID SUPP0RT ~ ANCH0R JI! ELASTGI J" INT ~ - FLEXIBLE ANCH0R El!E3 VALVE y Figure 2. Partial Plot of *Palisades Steam Line ~o P-8B Turbine Piping Model x

Wall Penetration-- Anchor 110 so* ooo 8' U6 uo All Piping Four Inch Nominal Size 200 CV 0521 ~-*b*

    • o 21.J

~~ 2'4b "~~ '~- 2*0 '~ '~ Match Point B , _Match Point A

  • I ~..

AUX. FEED s n AM rn I' HH NUPIPE MATHEMATICAL MllUl: I l'l ~--,/\\/\\/'-* t-C~J- ~-* -§ w EEE=.!

    • L.FGEND**

N0llE L0CAT10N MASSP01NT t 0l' A 1 1 l~ll SPRING flANGl.fi, SNUBIJER RI Gill SUPPIJRT ANCIH,JI? ELAST0 J01NT FLU< IBLE: AIKIHlR VAL.VI. I Figure 2. Partial Plot of Palisades Steam Line to P-8B Turbine Piping Model (Cont'd)

x.

0 Match Point C / 30.5' Floor Anchor --- Match

  • ~o ***

00 Li 'iJ.,. HO All Piping Four Inch Nominal Size 1illi'.. 1-f. Ul

  • i I*,;M
f' :ii<

NUI-' I f'l MA I HI: MA I I l.. AI t-lll:+: ._j-,/\\,'\\:" I r*-::*) '1 -1 __ E E )If

  • I I* t; I !. : -

UIJDI IJCA!ILlf< MAS~PJ I tl: _: ~k;.' ;.* 11; SPR ! IJG llAljGI f-; SNUHBrR R 1-G l D SUPPl.'JR T ANClll.JR ELASTl.J JIJINT FLEX I BLF ANOllJR liAL VE y z Figure 2. _ Partial Plot of Palisades Steam Line to P-3B Turbine Piping Model (Cont'd) x

.. a

  • \\*:

Match Point C Figure 2. HO uo All Piping Four Inch Nominal Size 10, Point~ Match AUX. FEED-STEAM T~ P 88 NUPIPE MATHEMATICAL M~Dfl

    • LEGENll**

N00E L0CATl0N Cl HASSP01NT UlCATl0N ..,.... v\\/V'-- SPRING llANGEll 1--c:::::J--- SNUBllER ~--1 RIGID SUPP0RT -~ AtlCfl0R El.ASH! J01NT ~ FLEX I OLE ANCll0R Ea3 VALVl y Partial Plot of Palisades Steam Line to P-8B Turbine Piping Model (Cont'd)

N

  • r~ri.

1"0

  • 141L no 116 110

'L"'L D Figure 2. a 16 alO All Piping Four Inch Nominal Size All\\. f 1-"I L .:;fi*:d-~ '""'-c Ill Jf' I t

  • 1 M,; ~ Ill: M ;, ; :,..

l*L *' :

  • tC...
  • * ! i *;I ! j:

I tlJl>l

,, A 1 I,1
;

('j I {.. :I 4)- ~

  • t:~

)Ii -~ Sl'R I tlG llAtoi.a h ,;fllJlllffll RIGID SlLf'J'llJ\\T AllCIWll HAST:.l Jl.llNl FL EX I Bl l AflCllllf\\ r~*l!E'1 VAL Vl y z Partial Plot of Palisades Steam Line to P-88 Turbine Piping Model (Cont'd)

w MS 522A------ MS 5228--- All Piping Four Inch Nominal Size --- Match Point E

Match Point F 1016 AUX *. H* l: 11

-;*1 i.-.AM

.;i< IJUf*' I PE M:-111£: M,\\1 I<,;; ~~-':.1. 1-{=J '"'1-l

  • -t=
    • I [*Gl*llll*
  • NUDE l0CATl1ltl MASSPUIN*r Li.JCAI :,ir; SPRING llANGlf\\

SUUBBER RIG I[) SUf'l'Uli:l At1Cll0R ELASTlll J~llNl FL[)( I RU: AtlCltlllf\\ y z .Figure 2. Partial Plot of Palisades Steam Line to P-8B Turbine Piping Model (Cont'd) x

Atmospheric Vent u u --- Anchor Point I 110 111* 1110 1100 10611. =l Eight Inch Nominal Size Piping 0 I Gl.'J t0 . I :.t~ 10¥,,." 8"x4" Reducer. ~ Match Point~ ll JI I du 1171) I I U!.. Anchor Point On 36 Inch Steam Line NUPIPE MATlllMAl ll'Al ~l,~!.i:

  • -c:~1-

.._1 -I c

  • l (-t;(:t l!l **

tlL'lOI. l IJCAJ I lit; HASSPL'llNT l.L'l*.:.*:.i:, SPRING JIANG! fl SNUIHlEll RIGID SLIPPL'llil ANC110R ELASlL'l J*l ltll FL EX l llU ANClllJ!< Ei!l"'l VALVJ' y z Figure 2. Partial Plot of Palisades Steam Line to P-8B Turbine Piping Model (Cont'd) x

The changes listed above were incorporated in the finite element model shown in the several continued se:ticns in Figure 2. The first 10 natural frequencies and periods of vibration for the revised model are shown in Table 5. As expected, the increased stiffness due to the additional anchorage details and supports had the effect of slightly raising the natural frequencies. Table 6 shows the ASME Code, Class 2, equation 10 stress results for the anchor points and the three highest stressed points on the model. Tables 7 and 8 summarize the revised support and anchor loads, respectively. In general, the revised stresses and support and anchor loads were lower than those reported in Reference 1. Microfiche copies of the NUPIPE-II computer runs utilized for these additional analyses are attached. The results discussed above demonstrate that the RHE letdown, auxiliary feedwater (model number two), and steam to P-8B turbine pipe lines will not be overstressed during the postulated SSE event used for these. analyses. These results should be used to supplement those found in Reference l. The results and conclusions stated in Reference 1 remain unchanged unless specif-ically mentioned above. REFERENCE

1.

M. E. Nitzel, "Summary of the Palisades Unit l Piping Calculations Performed for the Systematic Evaluation Program", EG&G Idaho, Inc. Report EGG-EA-5317, January 1981. 15

17 TABLE 5. SUMtilARY OF FIRST TEN NATURAL FREQUENCIES AND PERIODS OF VIBRATION--SfEAM LINE TO P-8B TURBINE T Mode i1:!!L (Second) 1.80 0.556 2 2.85 0.351 3 3.69 0.271 4 3.75 0.267 5

4. 16 0.240 6

4.72

0. 212 7

4.84 0.217 8 5.20 0.192 9 5.53 0.181 10 6.56 0.152 16

TABLE 6.-

SUMMARY

OF ASME CODE, CLASS 2, EQUATION 10, STRESS VALUES, 11CURRENT 11 CRITERIA 11 ANALYSIS (SSE LOAD CASE)--STE.AM LINE TO P-8B TURBINE STRESS (ks i ) Node Audit Calculations Allowable Corrment 5 9.77 36.0 P-8B anchor 315 25.5 36.0 Wall penetration anchor 470 14.0 36.0 Floor anchor 1120 18.5 36.0 Atmospheric vent anchor 1170 9.89 36.0 Anchor at 36~nch line l 015

35. l 36.0 Tee intersection 1020 32.5 36.0 Weld (end of tee leg) l 095 33.2 36.0 Valve-operator junction NOTES:
1.

2% damping used.

2.

Allowable stress (2.4 SH) based on SH = 15.0 ksi for ASTM A 106 Gr B carbon steel at 550°F.

3.

Equation 10 stresses include the effects of pressure, sustained loads (deadweight) and occasional loads (SSE). 17

If TABLE 7. SUP PO RT LOAD SUMM~RY--STE.AM LINE TO. P-8B TURBINE-- SEISMIC LOADS ONLY SUP PO RT LOAD ( K) current 2% ij)de Direction SSE 10 y 4.62 125 x 0.916 y 0.028 220 y 2.24 z 0.557 415 z 0.354 510 y 0.362 z 0.421 555 x 0.438 575 z 0.563 600 y 0.306 630 y 0.200 . 655 x 0.506 y 0.441 685 y 0.675 710 x 0.493 745

z.

1.41 770 z 0.490 800 x 0.483 y 0.627 18

TABLE 7. (continued) Current 2% Node Direction SSE 825 y 0.325 880 x 0.521 y 0.324 895 z 0.507 970 z 0.803 1040 INCL. 2.08 INCL. 1.95 1070 x 5.94 z 1.24

1.

Directions are global axis orientations. 11 INCL 11 implies that the restraint direction is inclined with respect to the global axes. 19

TABLE 8. Ml: f-0 R LOAD

SUMMARY

--STE.AM LINE TO P-8B TURBIN-E-- SEISMIC LOADS ONLY ANCHOR LOAD (Korin.-K) Current 2% Node Di rec ti on SSE 5 x 0.640 y

4. 14 z

0.769 xx 4.66 yy 7.42 zz 5.36 315 x 0.902 y 0.242 z 0.606 xx 17.3 yy 42.0 zz 4.Ql 470 x 0.542 y 0.372 z 0.199 xx 15.4 yy 4.73 zz 29.8 1120 x 1.81 y 4.29 z 1.95 20

TABLE 8. (continued) Current 2% l'bde Di rec ti on SSE xx 90.9 yy 199. zz 39.5 1170 x 1.55 y 0.236 z 0.171 xx 8.44 yy 3.50 . zz 46.2

l.

Directions 1 i sted are in the global coori nate system. 11X 11 implies a force in the global X direction. 11XX 11 implies a moment about the global X axis

  • 21}}
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