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{{#Wiki_filter:* COMBUSTION*ENGINEERING J)EVELOPMF.NT DEPARTMENT 11 TEST* REPORT PALISADES CRrM DYNA.~C - | {{#Wiki_filter:* COMBUSTION*ENGINEERING J)EVELOPMF.NT DEPARTMENT 11 TEST* REPORT PALISADES CRrM DYNA.~C - | ||
ANALYSIS REPORT | ANALYSIS REPORT APPROVED BY: | ||
La | La | ||
~~ | ~~ | ||
or ory Manager OOCUMENT NO. : | or ory Manager OOCUMENT NO. : | ||
TR.;..ESE-437 | TR.;..ESE-437 | ||
~~~~~~~~~- | ~~~~~~~~~- | ||
DATE OF ISSUE:. _ _t!J- :~. ,.:-. : ;~. . .: :. .,.; :_. ;tf~. . ;,.*_ _ | DATE OF ISSUE:. _ _t!J- :~. ,.:-. : ;~. . .: :. .,.; :_. ;tf~. . ;,.*_ _ | ||
I | I 1.ATORY- DOCKET Fili COP~- | ||
1.ATORY- DOCKET Fili COP~- | |||
1 | 1 | ||
' 8108110528 810803 ", | ' 8108110528 810803 ", | ||
i PDR ADOCK 05000255 I | i PDR ADOCK 05000255 I | ||
Line 40: | Line 35: | ||
* C. W. Rackliffe (Q.A. File) | * C. W. Rackliffe (Q.A. File) | ||
C. W. Ruoss B. J. Selig | C. W. Ruoss B. J. Selig | ||
* TABLE OF COmENTS SECTION TITLE PAGE NO. | * TABLE OF COmENTS SECTION TITLE PAGE NO. | ||
Line 51: | Line 44: | ||
* 9.0 | * 9.0 | ||
*10.0 CX>NCLUSION REFERENCES 15 15 | *10.0 CX>NCLUSION REFERENCES 15 15 | ||
.. TR-ESE-437 i | .. TR-ESE-437 i | ||
* LIST OF FIGURES FIGURE NO. TITLE PAGE NO. | * LIST OF FIGURES FIGURE NO. TITLE PAGE NO. | ||
1 Reduced Finite Element CROM Model 17 2 First Mode Displacements for the Reduced CRDr1 18 Model 3 Second Mode Displacements for the Reduced CRtM 19 Model 4 lhird Mode Displacements for the Reduced CRDM 20 Model 5 Detailed Finite Element CRDM Model 21 6 location of the Nozzles for Palisades Plant 22 UST OF TABLES TABLE NO. PAGE NO. | 1 Reduced Finite Element CROM Model 17 2 First Mode Displacements for the Reduced CRDr1 18 Model 3 Second Mode Displacements for the Reduced CRtM 19 Model 4 lhird Mode Displacements for the Reduced CRDM 20 Model 5 Detailed Finite Element CRDM Model 21 6 location of the Nozzles for Palisades Plant 22 UST OF TABLES TABLE NO. PAGE NO. | ||
List of Frequen~ies - Palisades CRDM 1 23 2 Bending Moment at Nozzle-Palisades CRDM 23 3 Maxim.mi Internal Forces - Critical Areas of 24 au:Ms (Worst Combination) 4 List of Frequencies for CRLMs Rows 25 5 Maximum loads of the Palisades CRIMs (Worst | List of Frequen~ies - Palisades CRDM 1 23 2 Bending Moment at Nozzle-Palisades CRDM 23 3 Maxim.mi Internal Forces - Critical Areas of 24 au:Ms (Worst Combination) 4 List of Frequencies for CRLMs Rows 25 5 Maximum loads of the Palisades CRIMs (Worst | ||
* 26 Q::imbina tions) | * 26 Q::imbina tions) ii TR-ESE-437 | ||
ii TR-ESE-437 | |||
: 1. 0 IlITRODUCI'ION The structural integrity of the Palisades CRI:Ms must be maintained during seismic disturbances of intensities as specified in Reference 1. | : 1. 0 IlITRODUCI'ION The structural integrity of the Palisades CRI:Ms must be maintained during seismic disturbances of intensities as specified in Reference 1. | ||
The purpose of this work was to detennine the worst seismic response condition for the Palisades CRI21 with existing seismic supports and to demonstrate the ability of the CRn'1'. to meet the given sei&mic loads and to satisfy the scramability condition. The DBE event was considered. | The purpose of this work was to detennine the worst seismic response condition for the Palisades CRI21 with existing seismic supports and to demonstrate the ability of the CRn'1'. to meet the given sei&mic loads and to satisfy the scramability condition. The DBE event was considered. | ||
Line 73: | Line 60: | ||
A representative, two-dimensional finite element model of the Palisades CRLM rows was developed and analyzed for horizdntal seismic loading. | A representative, two-dimensional finite element model of the Palisades CRLM rows was developed and analyzed for horizdntal seismic loading. | ||
F.ach CRrM in a row was modeled by use of a simplified representation. | F.ach CRrM in a row was modeled by use of a simplified representation. | ||
Preliminary analyses of the CR1:M rows allowed determination of the CRLM row with the worst response to seismic loadings. This rCM was analyzed in more detail by using a coupled finite elenEnt row presen-tation where two CRI:Ms were modeled in detail, and the effects of the other CRDMs were simulated by simplified models. The work perfoimed and documented in this report demonstrates the CRIMs ability to meet all seismic requirenEnts mentioned above. The results are st..mnarized below | Preliminary analyses of the CR1:M rows allowed determination of the CRLM row with the worst response to seismic loadings. This rCM was analyzed in more detail by using a coupled finite elenEnt row presen-tation where two CRI:Ms were modeled in detail, and the effects of the other CRDMs were simulated by simplified models. The work perfoimed and documented in this report demonstrates the CRIMs ability to meet all seismic requirenEnts mentioned above. The results are st..mnarized below | ||
* | * 1 'IR-ESE-437 | ||
1 'IR-ESE-437 | |||
'Ille nozzle and flange connection are considered the most critical areas of the CRDMs. | 'Ille nozzle and flange connection are considered the most critical areas of the CRDMs. | ||
Line 87: | Line 73: | ||
~model. | ~model. | ||
* A canparison of the first three modal frequencies and bending moments (fran a response spectrum analysis) is given in Tables 1 and 2. | * A canparison of the first three modal frequencies and bending moments (fran a response spectrum analysis) is given in Tables 1 and 2. | ||
* The deflection shapes for these modes are presented in Figure 2 through Figure 4 | * The deflection shapes for these modes are presented in Figure 2 through Figure 4 | ||
* | * 2 TR-F.sE-437 | ||
2 TR-F.sE-437 | |||
A canparison of the above infonnation confirms the acceptability of the reduced model. The detailed CRDM model basically is the standard Palisades mcxiel described in Reference 2. However, the piston tube and rcxi in this model were represented as separate structures (in the original model they were combined)~ Such a representation was chosen in order to determine the possibility of the rod to ''hang-up" (due to large deflections), and to make an assessment of the CRDMs . .. | A canparison of the above infonnation confirms the acceptability of the reduced model. The detailed CRDM model basically is the standard Palisades mcxiel described in Reference 2. However, the piston tube and rcxi in this model were represented as separate structures (in the original model they were combined)~ Such a representation was chosen in order to determine the possibility of the rod to ''hang-up" (due to large deflections), and to make an assessment of the CRDMs . .. | ||
ability | ability | ||
~: | ~: | ||
to scram during the postulated seismic intensities. 'Ille detailed model has one hundred-thirty nodes which are connected by one hundred-nineteen beam elements. The assembly of the detailed model with nodal coordinates is shown in Figure 5. | to scram during the postulated seismic intensities. 'Ille detailed model has one hundred-thirty nodes which are connected by one hundred-nineteen beam elements. The assembly of the detailed model with nodal coordinates is shown in Figure 5. | ||
4.0 CRll-1 ROWS ANALYSIS AND DISCUSSION The reactor vessel head of the Palisades plant has seven different CRll-1 rows. There are two types of rows. The first type of row com-bines seven CRI:Ms , and the second . type of row combines five . . . CRn".s | 4.0 CRll-1 ROWS ANALYSIS AND DISCUSSION The reactor vessel head of the Palisades plant has seven different CRll-1 rows. There are two types of rows. The first type of row com-bines seven CRI:Ms , and the second . type of row combines five . . . CRn".s The location of nozzles on top of the reactor is given in .~igure 6. | ||
Becaus.e of the symmetry, only four CRDM rows had to be ~on~idered. | Becaus.e of the symmetry, only four CRDM rows had to be ~on~idered. | ||
These rows are indicated in Figure 6, along with nozzle length infor-mation. | These rows are indicated in Figure 6, along with nozzle length infor-mation. | ||
All four rows were anlayzed by using finite element models which con-tained the simplified model at each CRDM location. The CRDMs were tied together by seismic supports at an elevatiori of 44.25" above the reference point (Reference 4). 'Ille seismic supports were modeled by three beam elements each. | All four rows were anlayzed by using finite element models which con-tained the simplified model at each CRDM location. The CRDMs were tied together by seismic supports at an elevatiori of 44.25" above the reference point (Reference 4). 'Ille seismic supports were modeled by three beam elements each. | ||
Since the supports were designed to transmit r:ooment loads and to allow horizontal displacements between adjacent CR.ll-ls, proper end release code teclmiques were Used to roodel these boundary conditions.. The CRI:M, itself, is a stiff s true ture | Since the supports were designed to transmit r:ooment loads and to allow horizontal displacements between adjacent CR.ll-ls, proper end release code teclmiques were Used to roodel these boundary conditions.. The CRI:M, itself, is a stiff s true ture | ||
* The critical areas are the nozzle, | * The critical areas are the nozzle, 3 'm-FSE-437 | ||
3 'm-FSE-437 | |||
. -..--:**:-** -- *--.,.. r ... - .* - . | . -..--:**:-** -- *--.,.. r ... - .* - . | ||
Line 121: | Line 101: | ||
-four analyzed CRIM rows are also given here. | -four analyzed CRIM rows are also given here. | ||
The calculated maximum bending moments axial and shear forces at the au:M nozzles, at the flange elevation, and in the ties are given in Table 5. | The calculated maximum bending moments axial and shear forces at the au:M nozzles, at the flange elevation, and in the ties are given in Table 5. | ||
4 TR-ESE-437 | 4 TR-ESE-437 | ||
Line 144: | Line 123: | ||
.~23M (7) 4.5(\.\2.5) | .~23M (7) 4.5(\.\2.5) | ||
(8) | (8) | ||
-~'C<D (9) | -~'C<D (9) 6 'lR-F.sE-437 | ||
6 'lR-F.sE-437 | |||
Since tangential stresses in the given directions (X, e, Z) are small (L A = 31.*744 | Since tangential stresses in the given directions (X, e, Z) are small (L A = 31.*744 | ||
= Fshear 03 = .3 ksi. ) , it | = Fshear 03 = .3 ksi. ) , it | ||
* was accepted that t hese directions | * was accepted that t hese directions are principal and stress tensor components in these directions are principal stresses. | ||
Then: | Then: | ||
\.0 -+ | \.0 -+ | ||
Line 163: | Line 138: | ||
The maximum bending moment was calculated in the* Row #4 for the CRLM' wi. th the longest nozzle, and is (15) | The maximum bending moment was calculated in the* Row #4 for the CRLM' wi. th the longest nozzle, and is (15) | ||
Then, | Then, | ||
' (16) | ' (16) 7 ' TR-ESE-437 | ||
7 ' TR-ESE-437 | |||
The maxinrum allowable bending moment at the nozzle can be obtained as the: following: | The maxinrum allowable bending moment at the nozzle can be obtained as the: following: | ||
Line 176: | Line 149: | ||
* 650°F ., | * 650°F ., | ||
Material: SA-193-B7 Allowable Sm 27.0 ksi Bolts l"" x 8 Number of Bolts (n) 8 Bolt locations | Material: SA-193-B7 Allowable Sm 27.0 ksi Bolts l"" x 8 Number of Bolts (n) 8 Bolt locations | ||
_t,: ,,0 IN | _t,: ,,0 IN J.,_ : 5."15 \N | ||
J.,_ : 5."15 \N | |||
: 1. ?> = !. so '""' | : 1. ?> = !. so '""' | ||
4 ::. \.0'2..5 "'" | 4 ::. \.0'2..5 "'" | ||
8 TR-F..SE-437 | 8 TR-F..SE-437 | ||
Line 199: | Line 169: | ||
Pb :. Pa_ 1. ~ :. | Pb :. Pa_ 1. ~ :. | ||
* 2'5"4 Po.- (21) | * 2'5"4 Po.- (21) | ||
Pc. ::. Po... t~ . S Pa.... (22) p~:. . \4lo PQ.... (23) | Pc. ::. Po... t~ . S Pa.... (22) p~:. . \4lo PQ.... (23) 9 'J.'R-F..SF.-437 | ||
9 'J.'R-F..SF.-437 | |||
* 1w\b =Po- (L, + \.,obL:z.. | * 1w\b =Po- (L, + \.,obL:z.. | ||
* Mb | * Mb | ||
Line 211: | Line 179: | ||
G1- :. ?o... ~ \J~ | G1- :. ?o... ~ \J~ | ||
"' A nA. (29) | "' A nA. (29) | ||
A ::. ~ / ,..l"\ - | A ::. ~ / ,..l"\ - | ||
4 \,U... .c:n4~) | 4 \,U... .c:n4~) | ||
~ . | ~ . | ||
. 0 j<:t..-.A ( \ _ | . 0 j<:t..-.A ( \ _ | ||
a:7't | a:7't | ||
Line 224: | Line 190: | ||
m - is number of threads per inch OD = l" n = 8 number of bolts VF - vertical .force which combines pressure and axial forces. | m - is number of threads per inch OD = l" n = 8 number of bolts VF - vertical .force which combines pressure and axial forces. | ||
Pressure forces at the flange bolts Pr = 2.5 ksi Area= 7.863 in 2 F = PA = 19.6588 (30) | Pressure forces at the flange bolts Pr = 2.5 ksi Area= 7.863 in 2 F = PA = 19.6588 (30) | ||
* | * | ||
* Manual of Stl'!el Construction, Seventh F.dition, Anerican Institute of Steel Construction, pp. 5-20 | * Manual of Stl'!el Construction, Seventh F.dition, Anerican Institute of Steel Construction, pp. 5-20 | ||
* 10 TR-F..SE-437 | |||
10 TR-F..SE-437 | |||
* Then vertical force equals: | * Then vertical force equals: | ||
VF.= 19.659 + 17.37 = 37.029 kips Maxinrum stresses in the bolts equals: | VF.= 19.659 + 17.37 = 37.029 kips Maxinrum stresses in the bolts equals: | ||
Line 238: | Line 202: | ||
Design Temperature: 250°F Material: AISA-4130 Allowable Sm | Design Temperature: 250°F Material: AISA-4130 Allowable Sm | ||
* 20.55 ksi The critical areas of the seismic support structure are indicated as sections A and B, below. | * 20.55 ksi The critical areas of the seismic support structure are indicated as sections A and B, below. | ||
The nodal point positions in | The nodal point positions in the ma thema ti cal mode 1 of the I | ||
the ma thema ti cal mode 1 of the I | |||
* structu~e are also shown here. | * structu~e are also shown here. | ||
IL? . 1; A linear bending manent dis- | IL? . 1; A linear bending manent dis- | ||
Line 247: | Line 209: | ||
*~ | *~ | ||
each beam element~ | each beam element~ | ||
.4..d' I .g'fS' I .g7;* | .4..d' I .g'fS' I .g7;* | ||
I I | I I I ,,. *.,..,.. | ||
I ,,. *.,..,.. | |||
11 TR-F.SF.-437 | 11 TR-F.SF.-437 | ||
Line 259: | Line 217: | ||
K =1.73 seismic loads coefficient for the DBE event. | K =1.73 seismic loads coefficient for the DBE event. | ||
Tht::n, M | Tht::n, M | ||
= ((QS.\f, -r q3.I\ - | = ((QS.\f, -r q3.I\ - | ||
4.12. | 4.12. | ||
~-\S * :, co4s) \.1:, = | ~-\S * :, co4s) \.1:, = | ||
\Sz.. \'2- \X,a~ | \Sz.. \'2- \X,a~ | ||
~ (33) | ~ (33) | ||
* Stresses the A and B sections were calculated as follows: | * Stresses the A and B sections were calculated as follows: | ||
in fw\~ * ~ M.,c. | |||
* Ga. ::. \/Jo... J ~b :. w \:> ) (34) | * Ga. ::. \/Jo... J ~b :. w \:> ) (34) | ||
_ i\\O~ ( _ \~?, | _ i\\O~ ( _ \~?, | ||
Line 277: | Line 233: | ||
'°°D-::. (37) 4.cPJ | '°°D-::. (37) 4.cPJ | ||
\52. -1'2.. = ~.12. k$:t:. (38) 4.142.. | \52. -1'2.. = ~.12. k$:t:. (38) 4.142.. | ||
12 TR-ESE-437 * | 12 TR-ESE-437 * | ||
* a2 and crb stresses are less than allowable stresses which, for DBE | * a2 and crb stresses are less than allowable stresses which, for DBE | ||
Line 285: | Line 240: | ||
(40) 8.0 THE ABILI'IY OF THE PALISADES CRDM TO SCRAM In order to address the question whether or not th~ ~.s under ~eismic | (40) 8.0 THE ABILI'IY OF THE PALISADES CRDM TO SCRAM In order to address the question whether or not th~ ~.s under ~eismic | ||
. loaaing, main-cain t:neir acili:ty to scram, deflection of the piston tube in comparison with the deflection of the rod was considered. | . loaaing, main-cain t:neir acili:ty to scram, deflection of the piston tube in comparison with the deflection of the rod was considered. | ||
Since the maximum deflections of the piston tube were determined in the CRDM with the longest nozzle (Row #4), these CF.I:Ms were roodelled in | Since the maximum deflections of the piston tube were determined in the CRDM with the longest nozzle (Row #4), these CF.I:Ms were roodelled in detail. A maximum displacement of .244" per lg for the piston tube was calculated for critical mode #1 (RSS displacement per 1 g equals | ||
.247") and .298" per lg for critical mode #1 for the rod (RSS .displace-ment per lg equals .307"). These displacements occurred at an elevation of 133" above the reference point. | .247") and .298" per lg for critical mode #1 for the rod (RSS .displace-ment per lg equals .307"). These displacements occurred at an elevation of 133" above the reference point. | ||
The defonnation-based scramability criterion can be described as follows. | The defonnation-based scramability criterion can be described as follows. | ||
Line 297: | Line 251: | ||
Rp = 1. 255" pis ton tube radius | Rp = 1. 255" pis ton tube radius | ||
. Rr = .813" rod radius . | . Rr = .813" rod radius . | ||
13 TR-F.SE-437 | 13 TR-F.SE-437 | ||
* Schematically, the above given criterion can be presented as follows: | * Schematically, the above given criterion can be presented as follows: | ||
Line 318: | Line 271: | ||
. The same result was obtained by using the inequality given above, | . The same result was obtained by using the inequality given above, | ||
** AL-rll r._ I ~ \.zss II + .422II - .2,\3 II : * ~(.a 4" (44) and thus ver~fies the ability of the OUM to scram . | ** AL-rll r._ I ~ \.zss II + .422II - .2,\3 II : * ~(.a 4" (44) and thus ver~fies the ability of the OUM to scram . | ||
14 'IR-ESE-437 | 14 'IR-ESE-437 | ||
* 9.0 roNCLUSION All representative rows of Palisades CRDMs were analyzed for horizontal seismic loads of 1.73 g's. The maxi.mum forces at the CRDM jmiction point to the reactor vessel head are within the allowables, stipulated in Reference s~ | * 9.0 roNCLUSION All representative rows of Palisades CRDMs were analyzed for horizontal seismic loads of 1.73 g's. The maxi.mum forces at the CRDM jmiction point to the reactor vessel head are within the allowables, stipulated in Reference s~ | ||
Line 331: | Line 283: | ||
P-FSE-003, March 19, 1981. | P-FSE-003, March 19, 1981. | ||
: 4. C-E Drawing CRI:.M J:nstallation Drawing, 2966-E-3011. | : 4. C-E Drawing CRI:.M J:nstallation Drawing, 2966-E-3011. | ||
15 'IR-FSE-437 | 15 'IR-FSE-437 | ||
* 5. Prel:iminar,r Stress Report, Des~gn Analysis of the _Palisades Control Rod Drive Mechanism Pressure Housing, #80345228. * | * 5. Prel:iminar,r Stress Report, Des~gn Analysis of the _Palisades Control Rod Drive Mechanism Pressure Housing, #80345228. * | ||
Line 338: | Line 288: | ||
Earthquake Engineering Research Center, Report No. 73-11, Revised April, 1974, University of California, Berkeley, California. | Earthquake Engineering Research Center, Report No. 73-11, Revised April, 1974, University of California, Berkeley, California. | ||
: 7. C-E Drawing CRil1 Shock Moun~ Assembly, #2966-E-2869. | : 7. C-E Drawing CRil1 Shock Moun~ Assembly, #2966-E-2869. | ||
16 TR-ESE-437 | 16 TR-ESE-437 | ||
. :J .,.. | . :J .,.. | ||
,_:___.. i_:_ ___ --- " .-~- - !i | ,_:___.. i_:_ ___ --- " .-~- - !i | ||
!. . I | !. . I 1* : : : i | ||
1* : : : i | |||
. ' . *:. :*:;. w | . ' . *:. :*:;. w | ||
: l: : * | : l: : * | ||
~ u. . | ~ u. . | ||
1 l-' | 1 l-' | ||
*;;ii~** | *;;ii~** | ||
i *! | i *! | ||
Line 364: | Line 308: | ||
T. | T. | ||
I: ~... *..*.*** | I: ~... *..*.*** | ||
ff I | |||
ff | |||
I | |||
~ . - - | ~ . - - | ||
- 1- | - 1-Ii I | ||
Ii I | |||
. I. .. ':*:.' .:*,_,;II); | . I. .. ':*:.' .:*,_,;II); | ||
*-... *-:-:- :*t-:-- :: | *-... *-:-:- :*t-:-- :: | ||
:~I :%c( ; | :~I :%c( ; | ||
Al '1' I . | Al '1' I . | ||
I " , .. , | I " , .. , | ||
i : : i:; | i : : i:; | ||
i; | i; | ||
.... ' ( | .... ' ( | ||
I : | I : | ||
Line 395: | Line 326: | ||
*-**I*--* ... | *-**I*--* ... | ||
' ; !! ! ~ ! ! . . | ' ; !! ! ~ ! ! . . | ||
'"'!"*-":: : i. | '"'!"*-":: : i. | ||
' .. j. "** .... " * * . . . . . . | ' .. j. "** .... " * * . . . . . . | ||
i I::: : :: i::: . .. .: .. -- -- -- | i I::: : :: i::: . .. .: .. -- -- -- | ||
-..* -.~* Y? ::: *-I:; If\ 1*.*:. :,: *;.*_: ~., '* '. ). '. :, ',* ... 11** -* f-j;. | -..* -.~* Y? ::: *-I:; If\ 1*.*:. :,: *;.*_: ~., '* '. ). '. :, ',* ... 11** -* f-j;. | ||
Line 413: | Line 342: | ||
>---.....--..---.-------,---IP--...._-+~....,c.__-t-...;_1--,,_-i;>--,.-t+"~+-~1---1--'--++.....,...+--41!--~-_.-+-.._t---4~-+-..,.-+-4~r--*~~~~~--*-*1--~ | >---.....--..---.-------,---IP--...._-+~....,c.__-t-...;_1--,,_-i;>--,.-t+"~+-~1---1--'--++.....,...+--41!--~-_.-+-.._t---4~-+-..,.-+-4~r--*~~~~~--*-*1--~ | ||
:TIU\ | :TIU\ | ||
* * *;: :;j* | * * *;: :;j* | ||
.~ .. I . | .~ .. I . | ||
Line 423: | Line 351: | ||
*. *, *. . '. ,', ;, *** I ', *.* i, | *. *, *. . '. ,', ;, *** I ', *.* i, | ||
;~:: .:::r--;:: | ;~:: .:::r--;:: | ||
:.* :,*.: .:. _;:**'.-'. *.*** r' .1,_:_; ~ , : 1.~:: I~ | :.* :,*.: .:. _;:**'.-'. *.*** r' .1,_:_; ~ , : 1.~:: I~ | ||
I 1.: *;~~-f ii. I.. | I 1.: *;~~-f ii. I.. | ||
Line 433: | Line 360: | ||
1f i: | 1f i: | ||
:.* :_- :.* *. ~ | :.* :_- :.* *. ~ | ||
~-*.*:I:_-:,*:. *.:: . en0 "' | ~-*.*:I:_-:,*:. *.:: . en0 "' | ||
rl r- | rl r-1 1 | ||
1 1 | |||
, " I* | , " I* | ||
-- : . ; : : ! ! ! ! : . : r~*: ' : I;! ' | -- : . ; : : ! ! ! ! : . : r~*: ' : I;! ' | ||
I' | I' I! I I t | ||
I! I I t | |||
-: : : 11 ! .-: ;: | -: : : 11 ! .-: ;: | ||
' : . I I 11 . . I I : :..,,1 : l i ; j. ~. I "i 1.1 11 ~. ; I.: I i I. | ' : . I I 11 . . I I : :..,,1 : l i ; j. ~. I "i 1.1 11 ~. ; I.: I i I. | ||
H ~: | H ~: | ||
::; .:: ::::!ii~ liil~'j: iilj ii'\::!! Ii:: ii,. i !Iii 11 lli! tttil i !.U llli l!i*! !t:: ....... :::~--- | ::; .:: ::::!ii~ liil~'j: iilj ii'\::!! Ii:: ii,. i !Iii 11 lli! tttil i !.U llli l!i*! !t:: ....... :::~--- | ||
1---+~-H~-+---lf----+__.., __ ---t-~+---1~-t<i'-T.-t-.,..,...+--rl"'-'-t-,..._.-t-~+tt--l-r;-o-t-<"""'".-t-~~....1-,-t-1r-t-~-+-........,.+---tl--'--t-.....--t-~-t-~ | 1---+~-H~-+---lf----+__.., __ ---t-~+---1~-t<i'-T.-t-.,..,...+--rl"'-'-t-,..._.-t-~+tt--l-r;-o-t-<"""'".-t-~~....1-,-t-1r-t-~-+-........,.+---tl--'--t-.....--t-~-t-~ | ||
:~* ~m :. 1 ffi: 1tr tr-~*::* ;1*;* rt* ---T +: * .'-" :r1; *1*-;T1; f:Tr :::* ;::: .. .. | :~* ~m :. 1 ffi: 1tr tr-~*::* ;1*;* rt* ---T +: * .'-" :r1; *1*-;T1; f:Tr :::* ;::: .. .. | ||
.:.: ' i I I 1 1!I 1 | .:.: ' i I I 1 1!I 1 | ||
i !I 1 | i !I 1 i : ! : "2 UI !: : * ~ ; ' ! : | ||
i : ! : "2 UI !: : * ~ ; ' ! : | |||
ijl 1: | ijl 1: | ||
I | I | ||
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Line 467: | Line 381: | ||
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.*. j F!Gl~ 2 FIRST MJDE DISPIACEMENTS FOR_'IlIB REDUCED CRI:M MODEL 18 'IR-F.SE-437 | |||
.*. j F!Gl~ 2 | |||
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FIGURE 3 | FIGURE 3 | ||
Line 716: | Line 557: | ||
* SECXlND MODE DISPLACEMENTS FOR 19 nm REDUCED CRIM t-ODEL TR-ESE-437 | * SECXlND MODE DISPLACEMENTS FOR 19 nm REDUCED CRIM t-ODEL TR-ESE-437 | ||
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FIGURE 4 | FIGURE 4 | ||
* nIIRD MJDE DISPLACEMENTS FOR mE REDUCED CRI:M MODEL | * nIIRD MJDE DISPLACEMENTS FOR mE REDUCED CRI:M MODEL 20 'IR-E'.SE-437 | ||
20 'IR-E'.SE-437 | |||
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It!! | |||
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FIGURE 5 DETAILED FINITE ELEMENT CRIM MODEL | FIGURE 5 DETAILED FINITE ELEMENT CRIM MODEL | ||
* .* 21 TR-E.SE-437 | * .* 21 TR-E.SE-437 | ||
~ MEO\. NOZ.Z.U:: | ~ MEO\. NOZ.Z.U:: | ||
*~o* WO. NO. L..E..S C:a'"t" | *~o* WO. NO. L..E..S C:a'"t" | ||
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ti +i" -I? -q +a tifl -n~ | |||
2- | 2- | ||
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Line 860: | Line 666: | ||
: 22. 2..4.11!> | : 22. 2..4.11!> | ||
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4 ~~ !A.33 | |||
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. b* | . b* | ||
2-Ui.lo1 2."1 FIGURE 6 LOCATION OF THE NOZZLES FOR THE PALISADES PI.ANT | 2-Ui.lo1 2."1 FIGURE 6 LOCATION OF THE NOZZLES FOR THE PALISADES PI.ANT | ||
'T'n. T.'t"',... , "'""" | 'T'n. T.'t"',... , "'""" | ||
.. I | .. I | ||
* TABLE 1 UST OF.FREQUENCIES - PALISADES CRIMs FREE"STANDING MODELS MODE NO. DETAILED MODEL REDUCED MODEL 1 1.122 1~148 2 7.667 7.674 3 13.84 13.73 | * TABLE 1 UST OF.FREQUENCIES - PALISADES CRIMs FREE"STANDING MODELS MODE NO. DETAILED MODEL REDUCED MODEL 1 1.122 1~148 2 7.667 7.674 3 13.84 13.73 TABLE 2 BENDING MOMENT AT NOZZLE - PALISADES CRDMs FREE STANDING MODELS KJDE NO. LOAD | ||
* DETAILED MODEL REDUCED MODEL % ERROR 1 lg 256.7 262.0 2 lg .on .010 3 lg 2.446 1.000 RSS lg 256.8 262.1 2% | * DETAILED MODEL REDUCED MODEL % ERROR 1 lg 256.7 262.0 2 lg .on .010 3 lg 2.446 1.000 RSS lg 256.8 262.1 2% | ||
'IR-ESE-437 | 'IR-ESE-437 | ||
TABLE 3 MAXIMUM INTERNAL FORCES - CRITICAL ARFAS OF CRilwfS (Worst Combinations) | |||
NOZZLE FI.ANGE TIE | NOZZLE FI.ANGE TIE ROO NO. MECH. 00. AXIAL SHEAR Mb AXIAL SHF..AR Mb SHF.AR Mb 1 27 9.601 1.104 J.8.44 9.600 1.099 3.512 9.575 144.2 2 31 9.730 1.131 19.51 9.729 1.125 5.009 9.703 148.3 3 39 10.23 1.222 23.51 10.23 1.212 10.01 10.20 161.6 4 38 10.66 1.247 23.72 10.66 1.231 10.59 10.63 159.6 24 TR-ESE-437 | ||
ROO NO. MECH. 00. AXIAL SHEAR Mb AXIAL SHF..AR Mb SHF.AR Mb 1 27 9.601 1.104 J.8.44 9.600 1.099 3.512 9.575 144.2 2 31 9.730 1.131 19.51 9.729 1.125 5.009 9.703 148.3 3 39 10.23 1.222 23.51 10.23 1.212 10.01 10.20 161.6 | |||
4 38 10.66 1.247 23.72 10.66 1.231 10.59 10.63 159.6 24 TR-ESE-437 | |||
* MJDE NO. | * MJDE NO. | ||
TABLE 4 | TABLE 4 | ||
*UST OF FRF.QlTENCIES FOR CRDMS ROWS REDUCED MODELS DETAILED MODEL RGl l ROW 2 ROW 3 ROW 4 ROW 4 1 5.980 5.876 5.548 5.491 5.627 2 5.981 5.877 5.550 5.538 5.672 | *UST OF FRF.QlTENCIES FOR CRDMS ROWS REDUCED MODELS DETAILED MODEL RGl l ROW 2 ROW 3 ROW 4 ROW 4 1 5.980 5.876 5.548 5.491 5.627 2 5.981 5.877 5.550 5.538 5.672 | ||
: 3. 7.341 7.279 7.085 6.795 6.791 4 7.403 7 .341 7 .105 7 .134 7.135 | : 3. 7.341 7.279 7.085 6.795 6.791 4 7.403 7 .341 7 .105 7 .134 7.135 | ||
.5 7.554 7.529 7.391 7.566 7.564 6 7.606 7 .600 7.571 7.696 7 .696 7 7.624 7 .622 7.613 7.696 7~697 8 7.703 7.701 7.696 7.745 7.744 | .5 7.554 7.529 7.391 7.566 7.564 6 7.606 7 .600 7.571 7.696 7 .696 7 7.624 7 .622 7.613 7.696 7~697 8 7.703 7.701 7.696 7.745 7.744 9 7.703 7.701 7.696 7.802 7.803 10 7.866 7.835 7.781 8.456 8.450 11 7.920 7.872 7.787 14.04 11.37 12 8.287 8.175 7.921 14.04 11.37 . | ||
13 8.903 8. 794 8.456 14.08 13.98 14 9.496 9.412 9 .153 . 14. 10 14.01 15 14.07 14.06 14.04 14.14 14.11 25 TR-ESE-437 | |||
13 8.903 8. 794 8.456 14.08 13.98 14 9.496 9.412 9 .153 . 14. 10 14.01 15 14.07 14.06 14.04 14.14 14.11 | |||
25 TR-ESE-437 | |||
* ~ | * ~ | ||
'!:ABLE 5 I.DADS FOR 11IE PALISADES CRDM'S (IDRST COMBINATIONS) | '!:ABLE 5 I.DADS FOR 11IE PALISADES CRDM'S (IDRST COMBINATIONS) | ||
ROW 4 - DETAILED MODEL/MECH. NOS. 45 & 38 AXIAL SHEAR Mb LOCATION (kips) (kips) (in/kips) | ROW 4 - DETAILED MODEL/MECH. NOS. 45 & 38 AXIAL SHEAR Mb LOCATION (kips) (kips) (in/kips) | ||
NOZZLE 10.01 1.03 21.43 FLANGE 10.01 1.03 13.96 SEISMIC 10.01 93.11 SUPPORTS | NOZZLE 10.01 1.03 21.43 FLANGE 10.01 1.03 13.96 SEISMIC 10.01 93.11 SUPPORTS 26 TR-FSE-437}} | ||
26 TR-FSE-437}} |
Latest revision as of 17:45, 23 February 2020
ML18046A853 | |
Person / Time | |
---|---|
Site: | Palisades ![]() |
Issue date: | 07/06/1981 |
From: | Barishpolsky, Davison J, Haslinger K ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY |
To: | |
Shared Package | |
ML18046A852 | List: |
References | |
TASK-03-06, TASK-3-6, TASK-RR TR-ESE-437, NUDOCS 8108110528 | |
Download: ML18046A853 (30) | |
Text
- COMBUSTION*ENGINEERING J)EVELOPMF.NT DEPARTMENT 11 TEST* REPORT PALISADES CRrM DYNA.~C -
ANALYSIS REPORT APPROVED BY:
La
~~
or ory Manager OOCUMENT NO. :
TR.;..ESE-437
~~~~~~~~~-
DATE OF ISSUE:. _ _t!J- :~. ,.:-. : ;~. . .: :. .,.; :_. ;tf~. . ;,.*_ _
I 1.ATORY- DOCKET Fili COP~-
1
' 8108110528 810803 ",
i PDR ADOCK 05000255 I
- ', p PDR .1
DIS'IRIBlITION TR-FSE-437 B. M. Barishpolsky J. Davison K. H. Haslinger (2) ff JI V
- C. W. Rackliffe (Q.A. File)
C. W. Ruoss B. J. Selig
- TABLE OF COmENTS SECTION TITLE PAGE NO.
1.0 INTRODUCTION
1 2.0
SUMMARY
1 3.0 REDUCED AND DETAILED MODEL OF 1HE FREE STANDn1G 2 PALISADES RACK & PINION DRIVE 4.0 CRIM R<JolS - ANALYSIS AND DISCUSSION 3 5.0 NOZZLE STRESSES 5 6.0 -S'l'RESSES IN THE FUNGE BOLTS 8 7.0 STRESSES Il~ THE SEISMIC SUPPORTS 11 8.0 mE ABILI'IY OF 1HE PALISADES CRIM TO SCRAM 13
- 9.0
- 10.0 CX>NCLUSION REFERENCES 15 15
.. TR-ESE-437 i
- LIST OF FIGURES FIGURE NO. TITLE PAGE NO.
1 Reduced Finite Element CROM Model 17 2 First Mode Displacements for the Reduced CRDr1 18 Model 3 Second Mode Displacements for the Reduced CRtM 19 Model 4 lhird Mode Displacements for the Reduced CRDM 20 Model 5 Detailed Finite Element CRDM Model 21 6 location of the Nozzles for Palisades Plant 22 UST OF TABLES TABLE NO. PAGE NO.
List of Frequen~ies - Palisades CRDM 1 23 2 Bending Moment at Nozzle-Palisades CRDM 23 3 Maxim.mi Internal Forces - Critical Areas of 24 au:Ms (Worst Combination) 4 List of Frequencies for CRLMs Rows 25 5 Maximum loads of the Palisades CRIMs (Worst
- 26 Q::imbina tions) ii TR-ESE-437
- 1. 0 IlITRODUCI'ION The structural integrity of the Palisades CRI:Ms must be maintained during seismic disturbances of intensities as specified in Reference 1.
The purpose of this work was to detennine the worst seismic response condition for the Palisades CRI21 with existing seismic supports and to demonstrate the ability of the CRn'1'. to meet the given sei&mic loads and to satisfy the scramability condition. The DBE event was considered.
For this purpose a one-dimensional finite element model of the Palisades CRLM, as docunented in Reference 2, was available. This model entails t.~e dynamic characteristics of the free standing CRrM structure and, with some modifications, was used in this analysis.
The analysis technique for the .Palisades CRIMs, which are tied together by seismic supports, was performed in accordance with the tru:M Seismic
- Review Plan given in Reference 3.
2.0
SUMMARY
A representative, two-dimensional finite element model of the Palisades CRLM rows was developed and analyzed for horizdntal seismic loading.
F.ach CRrM in a row was modeled by use of a simplified representation.
Preliminary analyses of the CR1:M rows allowed determination of the CRLM row with the worst response to seismic loadings. This rCM was analyzed in more detail by using a coupled finite elenEnt row presen-tation where two CRI:Ms were modeled in detail, and the effects of the other CRDMs were simulated by simplified models. The work perfoimed and documented in this report demonstrates the CRIMs ability to meet all seismic requirenEnts mentioned above. The results are st..mnarized below
- 1 'IR-ESE-437
'Ille nozzle and flange connection are considered the most critical areas of the CRDMs.
1be maximum axial forces and m::iments of 18.17 kips and 37.07 in kips in the nozzle are less than allowable ones.
1be maximum stresses, of 8.4 ksi, in the flange bolts are also.
less than allowable ones.
1be maxiim.Jm stress irt the critical area of the seismic support was canputed as 37.1 KSI and is less than an allowable stress of 47 .16 KSI. Scramabili ty of the CRDMs during the seismic event was demonstrated.
3.0 REDUCED AND DETAILED MODEL OF 'IHE FREE STANDING PALISADES RACK & PINION DRIVE In order to keep the problem size within acceptable limits (computer time) a* simplified CRIM representation was developed from the standard, more detailed Palisades model documented in Reference 2. The SAP4 canputer code (Reference 6) was used for this task.and thirty-nine nodal points, which are canbined by thirty-three beam elements, were
. used for the reduced model.
The assembly of the mathematical model is presented in Figure 1. The simplified CRDM model demonstrated good correlation with the standard *
~model.
- A canparison of the first three modal frequencies and bending moments (fran a response spectrum analysis) is given in Tables 1 and 2.
- The deflection shapes for these modes are presented in Figure 2 through Figure 4
- 2 TR-F.sE-437
A canparison of the above infonnation confirms the acceptability of the reduced model. The detailed CRDM model basically is the standard Palisades mcxiel described in Reference 2. However, the piston tube and rcxi in this model were represented as separate structures (in the original model they were combined)~ Such a representation was chosen in order to determine the possibility of the rod to hang-up" (due to large deflections), and to make an assessment of the CRDMs . ..
ability
~:
to scram during the postulated seismic intensities. 'Ille detailed model has one hundred-thirty nodes which are connected by one hundred-nineteen beam elements. The assembly of the detailed model with nodal coordinates is shown in Figure 5.
4.0 CRll-1 ROWS ANALYSIS AND DISCUSSION The reactor vessel head of the Palisades plant has seven different CRll-1 rows. There are two types of rows. The first type of row com-bines seven CRI:Ms , and the second . type of row combines five . . . CRn".s The location of nozzles on top of the reactor is given in .~igure 6.
Becaus.e of the symmetry, only four CRDM rows had to be ~on~idered.
These rows are indicated in Figure 6, along with nozzle length infor-mation.
All four rows were anlayzed by using finite element models which con-tained the simplified model at each CRDM location. The CRDMs were tied together by seismic supports at an elevatiori of 44.25" above the reference point (Reference 4). 'Ille seismic supports were modeled by three beam elements each.
Since the supports were designed to transmit r:ooment loads and to allow horizontal displacements between adjacent CR.ll-ls, proper end release code teclmiques were Used to roodel these boundary conditions.. The CRI:M, itself, is a stiff s true ture
- The critical areas are the nozzle, 3 'm-FSE-437
. -..--:**:-** -- *--.,.. r ... - .* - .
the jtmction o:f ~ and nozzles, and the seismic supports~ Therefore, the stressed state of these areas was detennined to demonstrate the
- CRLMs ability to meet seismic loads. In order to verify the CRr.M scramabili ty, the defonned state of the mechanism had to .be determined.
The piston tube displacements were considered for this purpose.
A Response Spectrtim analysis with an assuned spectrum level of 1 g (1 to 33 Hertz) was performed for each row of CRDM's. The worst combin-ation of the maxinrum internal forces in the critical areas of the aulfs are presented for each row in Table 3.
A review of the results given here, show that the worst combination
-of internal loads at the nozzle support (bending moment of 23.72 in kips and axial force of 1. 66 kips per unit g) was developed in the CRDM
- with the longest nozzle length <Row #4). Maximum interna~ loads at the flange elevation (bending moment of 10.59 in kips and axial force of 10.66 kips per unit g) also o.ccurred in that CRIM.
Similarly, review of the piston tube displacements demonstrated that
.the maximum displacement of .315" per lg occurred in the same CRDM.
Therefore, cru:M Row 14 was identified as the critical row, and was analyzed in more de.tail by using a .more complex finite .element model.
For this, the two symnetrically located CRIMs with the longest nozzle lengths were represented by the detailed finite element model. A Response Spectrum analysis of this row was then perfonned for a uniform spectrum loading of lg. The first fifteen modal frequencies are pre-sented in Table.4. For canparison,.the frequencies for each of .the
-four analyzed CRIM rows are also given here.
The calculated maximum bending moments axial and shear forces at the au:M nozzles, at the flange elevation, and in the ties are given in Table 5.
4 TR-ESE-437
Maximum values of this data were used to determine stresses in the CRil1 nozzle, in* the flange bolts at the junction of CR!l1s and nozzles, and in the seismic supports.
5.0 NOZZLE STRESSES Nozzle stresses are detennined in this section and compared to allowables.
Design requirements:
Design Pressure: 2.5 ksi (real 2.23 ksi)
Design Temperature: 650°F Material: SA-182 Allowable Sm: 18.0 ksi Weight (WI'): 1.906 kips.
Vertical Force for the DBE Case
- 40 kips VF = 18.57 kips Calculated as *21 W~k Axial Force 1.73 x 10.5 = 18.17 kips
- S~c. No. 70P-008, Rev. 2; No-loss-of-Fune tion seismic loads are defined as 1. 73g horizontal and . 2lg vertical accelerations.
Cross section of nozzle R \ ::. I. Yo4 IN Re. :. 1.55"1 '""
t = -~**,""
(1)
(2)
Faulted Condition (3)
\.qo<p M(l.SJ (4)
~-,, 4- + 4 .u.46 (5)
(6)
.~23M (7) 4.5(\.\2.5)
(8)
-~'C<D (9) 6 'lR-F.sE-437
Since tangential stresses in the given directions (X, e, Z) are small (L A = 31.*744
= Fshear 03 = .3 ksi. ) , it
- was accepted that t hese directions are principal and stress tensor components in these directions are principal stresses.
Then:
\.0 -+
- 32.~M (10)
S.8A.2.. ..- * '!>~ M (11)
(12)
(13)
(S.I.)max = 2.4Sm, f~r faulted allowable per paragraph 4.1.4.2.4 of project Spec. No. 00000-PE-110, Rev. 4, where Sm= .95 Sm to allow for**
a five percent factor of safety. Therefore, (s. :x:.) 11'\A')C.. = 4\. o4- ~sa:. (14)
The maximum bending moment was calculated in the* Row #4 for the CRLM' wi. th the longest nozzle, and is (15)
Then,
' (16) 7 ' TR-ESE-437
The maxinrum allowable bending moment at the nozzle can be obtained as the: following:
(17)
A ccmparison of the maximum computed bending moment at the nozzle to the allowable value is shown below.
(18) 6.0 S'I'RESSES IN 'IlIE BOLTS The goal of this analysis was to detennine stresses in the bolts of the flange which connects nozzle and mechanism upper housing.
Design requirements:
Design Pressure (Pr): 2.5 ksi (real 2.485 ksi)
Design Temperature:
- 650°F .,
Material: SA-193-B7 Allowable Sm 27.0 ksi Bolts l"" x 8 Number of Bolts (n) 8 Bolt locations
_t,: ,,0 IN J.,_ : 5."15 \N
- 1. ?> = !. so '""'
4 ::. \.0'2..5 "'"
8 TR-F..SE-437
1be 'NOrst combination of internal forces, which occurred at the flange elevation; (for the DBE event bending moment and axial force equal 1.73 ~ 13.96 = 24.15 in kips, 1.73
- 10.04 = 17.37 kips) was obtained in the Row f.4 for the cru:M with the longest nozzle.
It is assumed that the flange is not defonned under given loads con-dition.
~r
_i.3
?:l.S"
~:..
- s.q75*
j_,
1.0'"
- 1ben, M.b ::. Fa... ..e., ;- 2.Fb..2..l. ~ 2Fc. .Q~ ~ 2.l=d 14 (19)
"fii_ : Pb : Pc.. : Pei :. ~' : .Q.2. : }_ ~ : .14 (20)
JI.
Pb :. Pa_ 1. ~ :.
- 2'5"4 Po.- (21)
Pc. ::. Po... t~ . S Pa.... (22) p~:. . \4lo PQ.... (23) 9 'J.'R-F..SF.-437
- 1w\b =Po- (L, + \.,obL:z..
- Mb
+ JL 3 + .2.q2 .R. 4 ) = :Z..\.oo4c,;, Po- (24)
Po.... = 2.l.~ :. '*\SO "-'?c::. (25)
Pb ::. . C?f,\ "'"'~ (26) t'c.. ::. .5'14- \(.\~ (27)
Pd =- *\to!> *k.&ps (28)
S.tresses in the bolts can be calculated as follows:
G1- :. ?o... ~ \J~
"' A nA. (29)
A ::. ~ / ,..l"\ -
4 \,U... .c:n4~)
~ .
. 0 j<:t..-.A ( \ _
a:7't
.-=t14 2>
~) -
I Q..c:::::t.-'r
.11:u;FI 1 IN 2.
m - is number of threads per inch OD = l" n = 8 number of bolts VF - vertical .force which combines pressure and axial forces.
Pressure forces at the flange bolts Pr = 2.5 ksi Area= 7.863 in 2 F = PA = 19.6588 (30)
- Manual of Stl'!el Construction, Seventh F.dition, Anerican Institute of Steel Construction, pp. 5-20
- 10 TR-F..SE-437
- Then vertical force equals:
VF.= 19.659 + 17.37 = 37.029 kips Maxinrum stresses in the bolts equals:
Gb = \.1so
.(oB~,
+ ~1. o~ -::. ~- ~1 2> ~s:r 2(_.~1)
(31) and are less than the allowable stresses 8.378 <::: 27.0 7.0 STRESSES IN mE*SEISMIC SUPPORTS Stresses in the ties (Reference 7) are obtained in this section of the report and compared to the allowables.
Design requiranents:
Design Temperature: 250°F Material: AISA-4130 Allowable Sm
- 20.55 ksi The critical areas of the seismic support structure are indicated as sections A and B, below.
The nodal point positions in the ma thema ti cal mode 1 of the I
- structu~e are also shown here.
IL? . 1; A linear bending manent dis-
~ ..;
- s. **a tribution is assumed along
- ~
each beam element~
.4..d' I .g'fS' I .g7;*
I I I ,,. *.,..,..
11 TR-F.SF.-437
- *Then the maximum bending mcment in the critical section (A or B) was detenni.ned through nodal bending moITEnt values as follows:
- Llt. \<:..) K (32) where, Ljk'Lxk = lengths between j ,k and x,k points.
K =1.73 seismic loads coefficient for the DBE event.
Tht::n, M
= ((QS.\f, -r q3.I\ -
4.12.
~-\S * :, co4s) \.1:, =
\Sz.. \'2- \X,a~
~ (33)
- Stresses the A and B sections were calculated as follows:
in fw\~ * ~ M.,c.
- Ga. ::. \/Jo... J ~b :. w \:> ) (34)
_ i\\O~ ( _ \~?,
4 c!4) _ 3.14-(4.15!1) ( _ ?J.495 )::. 4.c:FJ (
3 S)
\,NA - ~ \ D4 ~ ~'2.. . \ 4.'15.i.
(36)
~ t52..\2.. :.
'°°D-::. (37) 4.cPJ
\52. -1'2.. = ~.12. k$:t:. (38) 4.142..
12 TR-ESE-437 *
- a2 and crb stresses are less than allowable stresses which, for DBE
_event, were detennined as 2.4Sffi = 2.4
- 20.55 = 49.33 ksi.
31.1'7 <<.. ~-~3 (39)
(40) 8.0 THE ABILI'IY OF THE PALISADES CRDM TO SCRAM In order to address the question whether or not th~ ~.s under ~eismic
. loaaing, main-cain t:neir acili:ty to scram, deflection of the piston tube in comparison with the deflection of the rod was considered.
Since the maximum deflections of the piston tube were determined in the CRDM with the longest nozzle (Row #4), these CF.I:Ms were roodelled in detail. A maximum displacement of .244" per lg for the piston tube was calculated for critical mode #1 (RSS displacement per 1 g equals
.247") and .298" per lg for critical mode #1 for the rod (RSS .displace-ment per lg equals .307"). These displacements occurred at an elevation of 133" above the reference point.
The defonnation-based scramability criterion can be described as follows.
(The force-based criteri~n is not taken into account because of its
. negligible value):
(41)
- where UL =maximum rod deflection at the elevation "L".
r
- Tfp =-piston. -tube deflection. at the elevation L".
Rp = 1. 255" pis ton tube radius
. Rr = .813" rod radius .
13 TR-F.SE-437
- Schematically, the above given criterion can be presented as follows:
' '\
\
defonned positions
' of the piston tube and the rod.
I initial positions of the piston tube and the rod.
11 Here, G11 is a gap between the piston tube housing and the rod surface .
- For the DBE event, Ur and Up are:
Note: Both rod and piston tube deflect ut Y"'
,_.,~ ")(, .~1"
= .4'91" (42) in same direction.
UL p - \.,3 ")I,.
0 11 244 = A
- 2.2..
,, (43)
For the defonned state, a minimum 11G11 was positive and equalled .367",
~ich indicates the CRLM scramability .
. The same result was obtained by using the inequality given above,
- AL-rll r._ I ~ \.zss II + .422II - .2,\3 II : * ~(.a 4" (44) and thus ver~fies the ability of the OUM to scram .
14 'IR-ESE-437
- 9.0 roNCLUSION All representative rows of Palisades CRDMs were analyzed for horizontal seismic loads of 1.73 g's. The maxi.mum forces at the CRDM jmiction point to the reactor vessel head are within the allowables, stipulated in Reference s~
'the stresses in the flange bolts which connects the CRDMs and nozzles are within allowables.
Tne seismically supported Palisades CRDMs can accept seismic forces as required.
OUM deflections are small. Therefore, the CRLMs are capable of scramning during OBE and DBE events of the referenced intensities.
10.0 REFERENCES
- 1. Engineering Specification for a Control Rod Drive Mechanism, Speci-fication No. 70P-008, Revision 2, April, 1968.
- 2. Calculation No. 60611~54, "Oneha-Palisades Rack & Pinion Drive mech~ism Free Standing SAP4 Computer Model."
- 3. K. H. Haslinger to J. Davison; Palisades CRLMs Seismic Review,"
P-FSE-003, March 19, 1981.
- 4. C-E Drawing CRI:.M J:nstallation Drawing, 2966-E-3011.
15 'IR-FSE-437
- 5. Prel:iminar,r Stress Report, Des~gn Analysis of the _Palisades Control Rod Drive Mechanism Pressure Housing, #80345228. *
- 6. K. J. Bathe, E. L. Wilson, and F. T. Peterson, "SAPIV, A Structural Analysis Program for Static and Dynamic Response of Linear Systems,"
Earthquake Engineering Research Center, Report No. 73-11, Revised April, 1974, University of California, Berkeley, California.
- 7. C-E Drawing CRil1 Shock Moun~ Assembly, #2966-E-2869.
16 TR-ESE-437
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.*. j F!Gl~ 2 FIRST MJDE DISPIACEMENTS FOR_'IlIB REDUCED CRI:M MODEL 18 'IR-F.SE-437
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FIGURE 3
- SECXlND MODE DISPLACEMENTS FOR 19 nm REDUCED CRIM t-ODEL TR-ESE-437
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FIGURE 4
- nIIRD MJDE DISPLACEMENTS FOR mE REDUCED CRI:M MODEL 20 'IR-E'.SE-437
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FIGURE 5 DETAILED FINITE ELEMENT CRIM MODEL
- .* 21 TR-E.SE-437
~ MEO\. NOZ.Z.U::
- ~o* WO. NO. L..E..S C:a'"t"
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2-Ui.lo1 2."1 FIGURE 6 LOCATION OF THE NOZZLES FOR THE PALISADES PI.ANT
'T'n. T.'t"',... , "'"""
.. I
- TABLE 1 UST OF.FREQUENCIES - PALISADES CRIMs FREE"STANDING MODELS MODE NO. DETAILED MODEL REDUCED MODEL 1 1.122 1~148 2 7.667 7.674 3 13.84 13.73 TABLE 2 BENDING MOMENT AT NOZZLE - PALISADES CRDMs FREE STANDING MODELS KJDE NO. LOAD
- DETAILED MODEL REDUCED MODEL % ERROR 1 lg 256.7 262.0 2 lg .on .010 3 lg 2.446 1.000 RSS lg 256.8 262.1 2%
'IR-ESE-437
TABLE 3 MAXIMUM INTERNAL FORCES - CRITICAL ARFAS OF CRilwfS (Worst Combinations)
NOZZLE FI.ANGE TIE ROO NO. MECH. 00. AXIAL SHEAR Mb AXIAL SHF..AR Mb SHF.AR Mb 1 27 9.601 1.104 J.8.44 9.600 1.099 3.512 9.575 144.2 2 31 9.730 1.131 19.51 9.729 1.125 5.009 9.703 148.3 3 39 10.23 1.222 23.51 10.23 1.212 10.01 10.20 161.6 4 38 10.66 1.247 23.72 10.66 1.231 10.59 10.63 159.6 24 TR-ESE-437
- MJDE NO.
TABLE 4
- UST OF FRF.QlTENCIES FOR CRDMS ROWS REDUCED MODELS DETAILED MODEL RGl l ROW 2 ROW 3 ROW 4 ROW 4 1 5.980 5.876 5.548 5.491 5.627 2 5.981 5.877 5.550 5.538 5.672
- 3. 7.341 7.279 7.085 6.795 6.791 4 7.403 7 .341 7 .105 7 .134 7.135
.5 7.554 7.529 7.391 7.566 7.564 6 7.606 7 .600 7.571 7.696 7 .696 7 7.624 7 .622 7.613 7.696 7~697 8 7.703 7.701 7.696 7.745 7.744 9 7.703 7.701 7.696 7.802 7.803 10 7.866 7.835 7.781 8.456 8.450 11 7.920 7.872 7.787 14.04 11.37 12 8.287 8.175 7.921 14.04 11.37 .
13 8.903 8. 794 8.456 14.08 13.98 14 9.496 9.412 9 .153 . 14. 10 14.01 15 14.07 14.06 14.04 14.14 14.11 25 TR-ESE-437
- ~
'!:ABLE 5 I.DADS FOR 11IE PALISADES CRDM'S (IDRST COMBINATIONS)
ROW 4 - DETAILED MODEL/MECH. NOS. 45 & 38 AXIAL SHEAR Mb LOCATION (kips) (kips) (in/kips)
NOZZLE 10.01 1.03 21.43 FLANGE 10.01 1.03 13.96 SEISMIC 10.01 93.11 SUPPORTS 26 TR-FSE-437