ML19269C297
| ML19269C297 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 01/11/1979 |
| From: | Meyer R, Simon W GENERAL ATOMICS (FORMERLY GA TECHNOLOGIES, INC./GENER, PUBLIC SERVICE CO. OF COLORADO |
| To: | |
| Shared Package | |
| ML19269C293 | List: |
| References | |
| NUDOCS 7901310061 | |
| Download: ML19269C297 (25) | |
Text
{{#Wiki_filter:C C . a u . 'u, L sm i V i n ' a l L v v i's . .~.m s N 1 '
.. t i Q: .135 sill) kDT
.T '.E :
Q SAFETY A'.ALYSIS REFCRT -- F5V Region Constrain: Devices D:::i:.ine ' Sys:e m Doc. Type Project .Decument No. I I::ue Date l
~ 'APRVL LVL ISSUE
SUMMARY
Next Indentured Document Prepared Approval ls:ue Da?! s Purpose of Issue / by/ 3 .. . engineering QA l Pro j.ect Sections Changco 12 7-78 R leyer N.A. Simon J/s I*
.* L. Johnson j y//0
/ '70 A. Kennedy 7'- ' /8/f7 R. Nunderlic: m.r$ / / /o/h /
Do not write in : pace below. Cantinue issue Summary on GA For'm 1485-1. sEv l l l l l l l l l l l l l l l l l l l l j l l l l l SH l l l l l l I l l l l l l l l l
- l l l l l l l l l ! l aEv i i i ! ! i ! I i !
! ! ! ! ! t I i I ! l I I l ! ! ! i sH l:s::c:: x.n o,gg_;.u m.u ,ola:,,:.3.: a .:s ,:: , -s :s ac i st i s2 52 s:,5 . 5s REV l l ! I l l l l 1 !
1 ! l l
! ! i i !
l l l l SH l1l2i2 ,i5,S,7;3,3!M;M 12i 12 :;; ! 15i 5'"?! 19 ':C ' 21: 22 : 22 ; : :5 j 0 : 27 l :3 { t 790131006/ P2;e at j
,, ,e
- C s' L .r. ?. n' .t 4'. ~m.v . ' ?. L" L"'..'n'.'.s.'
.c.. ..
...,,i ,-.e. c..-.n,.
- VIma n f.n . . .e6 v
- a.. C m .- . ...f . ;.ts . . -. s v ..t..wt c.--,. -- ,,
snn. 1 ,.,..s in ...a rc: a c.. 3
. 1 .L - i.n. . . .,i v. ,.-C C . .. ., , ,, . . FSV-5D-0067
- v. .v..s . ,. 0
~. Cn' ~. .=. "e O . '.'.' .' P'm' ' 'i " C". s* ". v" = lX\ . l .".",C*.*."_~'.'v"..'.m~.:~.
. . C.'.~ ". l l e.m M l Fl u -* eLte v etL: a CL wJe- A 4 l
4 t ya.+L,sA
..r l
.c24=*r .x , .e.}..wa.i
. t J . m, m *, e L-yv w,, *,. i
. i v X l n.- . 7 ,- ..eq, e .
.".?. ? t T. T
.f *4. ?.,,, .%.Gf **.s* 7 )a af a
p q W L g a. L g *
- 4. Si = = ~. '. _= ~t.*. u= r o. '. 'o e' ". = '. .' , .
Sv. a" ~. . '. 's. c,~. ..se' -.v.
. . - ~ = = . '.:.n' ."i v" =
Xl c
-~! *' -' n ' ' ~' m*
'O''''~~'c ~ - '
r O R _" a. :."' :,O.'. a C':. .:.
' ,~.~.: :.
~.3
- 5. Sn*. T.-'.
. .' .c 'a "'.. -
- 2 '1. '.' '_' ' C1'. s'. ."i v :.' l X' l
- 6. IP. . 7. ~.~ ' T. '. n~m'
.e. _T --v.
*o* .7.a~ ~. T_ . C'I I. I ly i.
- 7. . :. :.
ac..3- :. -.: . .-...m.,
,,. - . ,,, e :-w. - . .
. -v :. l . .< .\
- ca ..:. , C..,.=. , u :. .
- c. l lY t .
9. e._ .=..t - .:.=~ r .; o.n_. Oz.. ..=.. .= a .: _= u
.e..r. .~.~--.s.,....z.. , , - -
.r ... .,- . 3 rs/ r m,R Chao er ,,iv X
- 10. EAS:S FOR SAFI~Y EVALU/C'C::: (Aii addi:ie .21 Shects if Required):
See attached recort for details of this SAR'. s
- 11. I s" Sr' '; D "- uO S AF.7'. .' n' .' U. T ". a" ' S / _' T. C .r.',' .c. '. .' "v' '
r._rV t'.". 1 .O.r .s U .T.? r_ ". ,
. ? a" X l,'O 12.
EA" S/J: DIE;o s;JEri A;;ALYSIS/ LICE::SI:;0 EE7:ZU 7,EZ:: PEFrCF.'fID? YES % ::o i 13' ?U'h" s 57A" LEA. / 9 79 h lrY, I w /ifI 70 lli lII.A [C ?./ l'i.'.' *f / / 'L T -r '/ M, T. * .* . v^ ,1 9. ..
*. 7_ *
/
}f r.-
u.~. v a.. u s . . ., is-.r . a:.n - ./D . c.a:
., C O . a . u , : / , ,.s_ _s s
-r
$N Y /
.m,u m ,,-- ,,q_n ,, ,
/
d-
'j
_5
/*?_a_u YM-c- b' .. kO ,
ff"!/
/~L <.G s
,A-
, -, ?. a .<__ _f. 1- .-
g,Q. _ M .'.s,( ,i, ,wx-w s
,s? o o ,L ,/?
s, e m ,z a ,. w w _ ,. ,
*'o / '
d -l' ,,:* mfl
- s:'_ n,e '
.. -~< s i /i .Jc Aw . _ .e z . , f*w f f' _, ,
i *
/ /
,/ t
. /, s
' ,ws.
. .. L m - . ;,wu ,i s ,. ,?,.,c '
/ "/
cn - t . .>.s ! .. M( a a .r. / s. t
9 . TABLE OF CONTENTS
- 1. INTRODUCTION AND
SUMMARY
l
- 2. PLANNED MODIFICATION I
- 3. OBJECTIVES AND PERFOR.MANCE CRITERIA I
- 4. DESIGN DESCRIPTION 3 4.1 Mechanical Features 3 4.2 Insertion and Removal Handline 3
- 5. PERFC MANCE EVALUATION - Normal Operaticn 3 5.1 Overall Reactcr Performance 3 5.2 Gap Flcw and Pressure Distribution 4 5.3 Structural Evaluation 5
- 6. SAFETY ANALYSIS 7 6.1 Consideration of Potential Impact en FSAR 7 Chaptar XIV Events '
6.2 Ccnsideration of Potential New Concerns 8 Intrccuced by RCDs 6.3 Abnormal Conditions Structural Evaluation 9 REFERFMCES 15
SAFETY ANALYSIS REPORT FSV REGION CONSTRAINT DEVICE
- 1. INTRODUCTION This Safety Analysis Report (SAR) presents an evaluaticn of the installa-tien of 84 Regicn Constraint Devices (RCDs) into the core of the For St.
Vraib Nuclear Generating Station. The RCDs will mecnanically interlock fuel regions acrcss the too layer of the core and crevent accumulaticn of bypass ficw gaps at regica bcundaries. The constraint devices will stabilise external regicn gaps at their nominal values and will limi: changes in gao ficws anc minimize pressure differences across regicns. Basec on ubservec data, it has been ;cs:ula:ed that cnanges in gap widths, ficws, and ressure cistributions contribute to observec temperature #1uctua:icns in the primary ccciant systam. This repor cescribes the mecnanical design of the Regicn Constraint Devices anc summarizes the structural and other engineering analyses which sub-stantiate the design adecuacy of the devices. The potential effects on core performance and fuel handling cperations are evaluated, as is the potential impact on pcstulated accident sequences described in the Fort St. Vrain Final Safety Analysis Report (FSAR). The potential for introducing new safety con-cerns is also discussed.
- 2. PLANNED MnDIFICATION i The proposed modification is to add 84 Regica Ccnstraint Devices to the too layer of hexagonal elements (keyed plenum elements). These mechanical links are placed at locations in the core where 3 regicns inter ec (Figure i) with each of the 3 pins inserted into the handling hoie of a keyed pienum ele-ment. The additicn of the RCDs results in a more fully constrained keyed tcp ccre layer. The present keying configuraticn is that tcp layer elements within each fuel regicn are keyed to each other but not to elements in adjacent regions. The RCDs provide inter-region keying and preclude the accumulation of gaps between regicns that might result if several ccgions are displaced in the same directicn.
- 3. OBJECTIVES AND ?ERFORMANCE CRITERIA The primary cbjective of installing the Regicn Ccnstrain: Devices in the ccre is to prcvide a permanent soluticn to the core temperature fluctuations that have cccurred at the For: St. Vrain plant. Care ficw and pressure dis-tributisn analyses have shcwn that st::ic pressure differences cccur when gaos chcnge wi:hin the core array. Small pressure differencas acting over the large surfsce area cf a regico car -esui; in forcas large encugh to dic? lace regicns anc/cr reflector columns. Subsecuen: #icw redistribu icns may cause :hermai
distorticns in side reflector columns of sufficient magnitude tc cnange :ne gaps again. Mcvements of coittns and regicns, accompanied by local pericdic changes in bypass ficw best e.yclain the cbservec emcerature fluctuaticns. The Region Constraint Devices will stabilize g20 flew areas at the tco of the core to near ncminal values. The triangular oitcn of the three pins is chcsan to prevent cny cross core stack-uo of gaps withcut changing the normal positica of pienum elements witnin eacn region. During operatien, the pres-sure drco across the flew centrol valve creates a radially inward pressure difference ccross the too planta elements in e regicn and therefere causes them to grcuo around the valve. In this positicn, the keyec elements in a regicn rest againct each other en the raised contact pads (Figures 2 and 2). Witn the RCDs installec, planum elements will still move to the ncrmal grcu;ed position cut the regicn itself will be ccnstrained frcm " leaning" as a unit. The primary performance criteria of the RCDs is that, cnce installec, tney provide a mechanical inter-regicn linking functicn without interfering with normal plenum groucing arounc the crifice valve. Structural criteria whicn dictatec the design of indivicual RCDs are based on excected icacs curing nor-mai and abnormal operating ccndi-icns. Specific design criteria are as fci-icws:
- 1. With the RCDs installed, the stresces in involved core ccmcenents will ce less tnan yield under normai ocerating conditicns and dur-ing an Operating Basis Earthcuake (OSE).
- 2. In the event of a .10g Design Basic Earthcuake (DBE), the stresses in all ccmponents will not reach the ultimate strerrf.n .f the mate rial .
- 3. The RCDs will remain intact and in plate until rer.cVed oy the fuel handiing machine.
- 4. Overall reactor performance is 'nct affected by thz. presence of the RCDs.
ine r.c,s will maintain nearly unitorm gap ricw areas across tne core inlet. -
- c. Materials are ccmoatible with the ceactor envircr ment and wit" existing interfacing harcware (keyed pienum elements).
- 7. The RCDs will be ccmpatible with fuel handling equipment after minor cnanges are mace to the grapple head.
- 8. Since each RCD contacts a pienum element frcm 3 different regicns, each RCD can be removed cr installed from any cse of the three rescective reference penetraticns , i.e. , normal refueling ccera-ticas are simplified if an RCD can be installed thrcugn ene penetraticn anc remcvec througn another if desirec.
m
;. c = .e a.
- C". ' c .=. u^ .=a' .= ~i l C",
S.l \%Chanical Features
.. The Region Ccnstraint Cevice (RCD) c.onsists of a central triangular pla:e
(.- ivc 0 umclierpia e; with an :,ncone,t or s ,.ncn thic4, an-: c or <0 carocn s:eet 718 oin boited to eacn corner of the triangle (Figure 4). The pins fit into the fuel hancling pick-uo holes of 3 acjacen: keyec plenum elements at the intersecticn of three regicns (Figure 5). Three dcwels and a fuel el2 men: pick-up nole are proviced at the top of :he RCD to crovide for crientation, indexing and inser:icn/removel, respectively, by the fuel hancling machine. Leaa-in chamfering at the end of each pin and on the pienum nancling noie ensures that the pins will engage three plenum eierents simultaneously, recuir-ing enly the 2C0 lb. dead weignt of the RCD for full inserticn. Pdn chamfering is surricient to al,icw inser:icn uncer conci:icns unsre elements are separatec u
<y up to a i.u in, gap. 7acn. c1n extencs c.cc in. into :he pick-up noie of a keyec element olenum elemen to allcw fcr ex ec: d 20 year variaticns in col-umn ne,.gnto.
..ine pins are cut to a nearly half-rcunc crcss :ecticn to ai ncw for cassage of the RCD thr: ugh a 17 in diar.eter sleeve insice the refuelinc penetra:ica and fuel hancling macnine. n cnremium carcide flame spray c:2 ting an: dry film itarican are acclied :: tna cins :c reduce fric:icn an: wear a., a
- a. o- u. .u Cn-....- o .a ...i
,: .u- a, .u. ..
- 7 r. ,
, . .c, c. , . a. C n an up <.. i e. t. o, . .nc ;.a:iu:
- i. ...,:
sw. .c .; o:n w. .e r i e. .n. ,-.. .... element pick-up holes. Lccking pin: are inciucec cn all bolt heacs. Threacec connections usec 0 attach the c;weis and the handling hole tube are fillet welded after assembly. Choice of material for the pins and boits was dic-tated by structural consideraticns discussed in Secticn 5.3. Critical dimen-sions specifying :ize, waign:, pi.1 spacing, etc. , were chcsen basec cn performance criteria and interface requ.rements .vith existing c mponents. 4.2 Inser icn and Removal Hancline The Region Constraint Devices can b) inserted into the reac:cr and removed using the existing fuel handling equipment with minor mcdificaticns that dc no ::mprcaise normal fuel e,iement cancling. _hese . . i mac.._.iricaticns inciuce: 1 .n-cc1ricat1cn or the fuel storage racy extensicn ralis to allow fcr s: rage of RCDs, 2) Azimu;hal drive mechanical s:co replacemen: to alicw for increased azimutnal rota:icn, 3) Additicn of two c uel helas to the grapple head to ac: mccate the dowel pattern on the RCDs. An RCD may be inserted thrcugh one refueling penetraticn and removed througn an adjacent penetraticn. The devices can be stored for transport to storage inside tne. handling machine above the storage rack used for stancard r.uel elements. ine weignt or about 200 lb. is within the range of weignts normally handled by the fuel handling machine.
- 5. .=ERFOR".A"CZ EVALUATICH ."croal Cperation 5.1 Overall Reactor Perfor ance As cescribed aarlier, tne crir.citai ::jec:ive of the Regicn Cen:: rain:
Cevices (RCOs) is :c limit :ne maximum vaiua cf the in er-re-icn ga:s at :ne o#. 'e.".. "^*a.
.v --. 7.G2 i .". D ' r ~. ' #. .."._'"3 u" : "<' ' ^ ~- - - .1 u-
- - - - ' * ". '. "re ". #. F '. ~ ' r. " ' 4. _" a "n
- w . *-
Cu::ed bel '... W
5.1.1 Nuclear Desicn: The insttila-ica of the RCDs will have no imoact cn the nuclear cesign or projected nuclear performance of the core except as
.their utilizaticn 3ffec:: fuel anc gra:hite tem:eratures. As di:cusred belcw, the cnanges in tem:crature are negligible. No changes in racial or axial pcwer distributicn, control roc worths, snu:ccwn margins, or kinetics cara-meter will result fecm tha use of these devices. With the currently installed neutrcn scurces, the RC s will recuce tne ccunt rate of the start-up detecters by about 25%. Mcwever, ccun: rates will be acecuate and within te ch . stec. requirements througn cycle 2. Installation of reciacement c The streng:n of these new sources
- curces wiii retiec: is planned .
tne presence fcr :ubsecuent,s.ycles.. or RCD 5.1.2 Thermal /Hvdraulic Perfor ance: The inctallaticn of the Region Constraint Devices w1ii resui; in a 11m1 ing cr the maximum gap width between fuel regicns anc therefore ficw bet..~een two regicns. This will nave a beneficial effect on fuel temceratures and ;erfcrmanca since the amoun of bypass ficw will, if changed, be reduced. The effec is nct large, hcwever, and no crecit is taken for it in thermai/ hydraulic analyses. The RCDs will slig .tly increase the ficw resistance of tne ccre :y e m c r. 4.
. c;-.>r 7 7 e' a, *W,.... c2-p
~.j c. .n. . . y ...3
. . .w. e +.. - a nvs ..w. e. na 1s e.c. . .n . 21 2. r. ~a p. .a.
ine resulting recistri uticn cf fica to increase in mass ficw ra:e in the ccosant r.c.ies cauces a stati increate in ccre pressure drcp of less tnan . ..i . : .s . Tnertal effects on the core due to crossficw resulting frem RC s cover-ing gaps are neg..l i gi c ,i e. _he i ,targe chamfers on the eg_ges or t.ge plenum e,lements . enable fitw to enter gaos directly uncer the .,C.n , s s . _.ine locailcec c1stur:ance of gap flow arcund the RC s dces not alter crcssficw caths in tne core and the small decrease (1.25 maximum) in total gao ficw is not grea encugn tc c _se si g:. .
.an: thermal effects on core elements. The RCDs will precuce no ficw alsturbances in t.,.e upcer plenum :nat would have an adverse effect cn flow ccntrol valve performance. Hence, the thermai/hycraulic 2nalyses describec in chapter XIV and r.ppenc..1x D or. t.a.e r.c,R n remain appropriate for ncrmai cper-aticn and accident analyses.
5.1.3 Fuel Performance and Fissicn Product Release: 3ecause nc adverse impac on fuei cr gracnite tem:erature 10 anticicatec wnen the RCDs are installed, and since the ccre will be operated witnin limits prescribed in the piant tech-nical specifications, the expected fuel performance and fission product release values will remain at their presen: levels. Accordingly, the design fission prcduct inventories presented in Secticn 3.7 of the FSAR will not be exceeced and are appropriate as scurce terms in accident analyses. 5.1.4 Core Oceration: The use of RCDs will not ecuire special coerating pro-cedures cr revisicns to the plant technical scacifications except for descrip-tion: of plant ccmponents. 5.2 Gac Flcw and Pressure Di::ribution Tha_ a. f. '. n. e. v 's n c; .. '. #.1 m-.-i "..~. . . =.e. . m rn. ". 4 . u . . " 'J o '. c. . vi
. '. 4n s w o l "l a 3n "mv c ..n..c . = si . .
a.g y j c o. .e e.q . 6-- .J
....a. _ e. ..
3 '! , 4 7 aC . '..c.a.... 31. m. ._.~c e. . e..A. n --
.a u. g I u .n e..n. d. y e i n. q
.~w...
La - J"*.CIR. CCCG l . 3 . c.. c. c. . . r =- l'. w'4.47 c'n #. . .. r . ~...'o r.v. .~.+.l.. r
""^ T' r. c. r o. c u l w.- #. r . ~. . .". #. s . ?. u d. y s n c'.'.e d c h 3 f0 llc.-Ilng fluic sys 2m arformance 5. ICCS :C.er anC 3.5 M 105 lbr/
. . . .....u
. . , , _ - . :<n... ..
e a) For a given core ccnfigura:icn, the installaticn of ccnstraint devices will keep the bypass flow to a minimum possible value by .creventing lar e Jacs fr:0 ccaning uc at the ::c of the ccre. ir.e maximum cressure cir..rerence between gacs acrcss a rue.i reglen b ,) at any axial levei is predicted to be 0.6 psi with the RCDs installed. This a? cccurs across regicns adjacan: to the side reflec cr with the resulting force acting toward the center of the ccre. Significan: changes in the racial cressure distribu-tien due to variatica in gacs within the tolerances between the ccns: rain- devices and the fusi hcndling noie of the metallic plenum elements are no: expected. c) The ccnstraint devices ccnstrain gap cir.ensions be: ween the plenum elemen s (ber.seen pads) of acjacent regicns in the rance of 0 inches tc 0.15 incnes, -hereby preventing large pressure differences frcm deveicping in the core. The cens rain: devices
..u. =. . a. :. v- . gi a.,43 .a-r.e:.:c.,n any ,6,y r., m. .
. . r."u-a r c ~6 - '= -r = 'a .v r ;. c r"a.
i ".. *. .c - r =. " i a ". . . . w i ". r . n. c. - a' r . w" 4. #. #. r. r c_ .*...u" a c . 5.3 Str:::urai valuati:n The structural evalua:icn of the ccre with Recica Cons: rain: Cevices (RCDs) incica:es sucstantial margin of safety for ali ccmocnents uncer nor-mai cperating uenditicns. The ccmocnents with the highes stresses are tne reflec:cr block keys, RCD bolts anc RCD pins. The RCDs transfer the loacs frca the fuel regions to the hex reflector columns. The loac then passes through the hex reflec:cr bicck keys in:o the permanent sice reflectcr biccxs and then :c the core barrel thrcugn the tco reflector keys. The ncrmal cperating Icaos include leads due to pressura gracients across regicns and leads recuired to move regicns to unfavored positions. The
,,favorec position, of a regicn refers to tne slign: teaning ci cciumns taa: .. . . . .
cccurs due to the stack up of normai tolerances anc to irradiation shrinkace. The maximum normal ccerating loads occur at the bouncary of the core. Here, both the cressure gracients and tne cumulative crcss-core gacs can be at max-imum. The larger crcss-core gap increases the likelihcoc tha an RCD will ce recuired to pull a regica to aa unfavored positicn. Furthermore, the Icacs trcm tne five-rue. -column regicns (Regicns c0, 22, 20, 49 and 22, anc. -20 in - - Figure 1) are transferred to the hex reflector columns by RCDs which are also required to carry the loads from the adjacent seven-fuel-column regicns. In the center of the core, the pressure gradients across regions are much less than these at the bcundary. The maximum cumulative cross-core gap is half of the maximum at the boundary. In additien, the RCDs in the ccre interior are positioned symmetrically accut each regicn which allcws all of the leads to be transferrec directly to the bouncary. The pressure gracien s acronc the outer fuel regions creduce forces wnica tend to cusn trece regier.s :cwarcs tne center Of the c:re. The RCCs r a- c . *. 4. . ..q j 2 . . . g y n. . . =. n.
. . ne .
- 2. n d . r. ., r c . a r ..'.n. 'I o m' " c t.o ..S. "o C. x #c.#',c.
. i -. .,*.,*. "
'! v* .. b.
< e .". s .
For :ne :even-fue'.-cciumn regicns , nis lcac is assumec c be car-ied by 2,
?C:c cc :ne hex reflec cr : lochs, ;rccucing a icac cf 17; ib. ;er :in. The cro.c..- ".rn. l a. .- d #. .-. . . . . . . . - # 3, <
n 3. =. 'n r. t ,.n -o. n: i. c . . i. c2 c. .- . d. e.- s h v . . .o. . . .m. .r.".i,.-...
=
. O
RCDs, which also carry loacs frcm the acjacent seven-fuel-cclumn regions. The maximum pin load (338 lb.) is the sum of pressure icacs due to the five- anc seven-rue i-column reg 1cns. niter several years or. ractation excesure, scme 07. tr.e cc.iumns w111 se .. SuoJectec to uneven irractaticn snrinkage causing the co,lumns to .tean in varicus cirecticns. The RCDs will then ce recu1 red to hold these columns to an unfavorec vertical positicn. The RCD pin Torce recu1 rec to held a rigid column in a ticced ocsiticn is il7 lb. wnen the column is sucjectec :c a 9.0 psi vertical pressure c.rco. .he top or tn.e cciumn can ceTlec: elastically . i 0.24 in. before the RCD pin lead reaches 117 lb. If it is assumed tha all of the cciumns in cwc regicns near the boundary lean in the same direc-icn anc that this lead is carried by t'.co pins, then the m2"imum ioad to move these regions to an unfavored positicn is 319 lb. Ccmcining this load with the cressure lead (2a8 lb.; yields a maximum normal operating icac cf 1167 lb. for hex reflector block keys and RCDs at the core councary. In :he interior
- a. .o_-
u - .r e_. , .,o
.o ._e,j v o.c -, ' " -
s_ i. u= c *w '. .= ' l y' 'e . w m= - . 2_="., -- o
- o" e r , '..h -.a r c.-
.m.-. . , .s. n_ .e. .. u~
< 2 _-ss
. . _ - . . n . ,. . . . u . n. ..m.. _ n
. . c _. ..
. ...: ".~.n. "s "~^ = 'id e en= i m c_.4.m-. r. c e,",cn '. r. .'.n.
. 2,
... ... , , c . c s. - sv - c. a. s. e.-o -, .s_e_..,., . . . . . e..
i r ,
. _.a.......
o .m n .. . ; r.%
-s v.
2 y) 16s .
-t :
=. .sso- 2. v- . .c ~ws
. . e n .-
..o. .ci. . - = . ' ! a . ". ". n. i f' ". a..-w" #. r. . .p- '. . = .r '.
i c r. '_ . c.'. . ...c. 4. ". '. =. - i. r. r ^ #. ',.".e. c_ .y .. r c. r. . .s s. t. es -
. . s. . . .- 4. , c. ...w
._ o . .o . . . c, : me
- . . . . 4.n . h2-c, s c<an .c2- .c e..
- c. . .e- -r a. .c e. t., r c-gradien c are nc: crecic:ac in :ne center of :ne ccre. Therefers, :he maxi-mum normal operating load is 4l0 lb. per pin.
The failure mode for the reflector block keys is shearing of the threacs of the screws which attach the key to the block. Failure occurs when the screw shears ou: the internal threads in the pienum element. The maximum shear stress in the threacs under normai cpera-ing conci:icns is calculated
+, sn 9_c - -
_r. a
.m .- e. n. gn e.1. --i n c_ c . = .= r f, i a i m - _- ,. . c. . e s m . /. :0:: . e. c r w .e_ re i a. n , a =_.. 2_ , .. . .
. . . . . - - n.2s.e
- o. .
(SA-387 GR 22) is 16,0C0 ps1. s The bending stresses in the RCD pins and the loacs in the RCD bcits are depencent on the vertical offset between columns. Analysis sncws tna: irrad-iation shrinkage can produce vertical offsets between new and old colum s of 2.40 in. for regicns at the core bcundary and 4.62 inches fcr regicns in the interior of the ccre. This produces RCD pin bencing stresses of 26,700 psi for pins at the bouncary and 2d,200 psi fc pins in -he core interior. The yield c:ress of the pins (Incenei 718) is 12?,000 psi at 760 F. The RCD bolts have tensile stresses of 6,550 psi at the boundary and 2,920 psi in -he core interior. This ccmpares to a yield stress of 80,2C0 psi (SA-453-660) at 760 F. The abcvc loads and yield stresses are summarized in Table 1. The radiaticn exposure of the RCDs is the same as the keyed plenum elements . td no significant effect on material properties is preductec. The additien of the RCOs adds a maximum of 1500 lb. tc the weigh: cf a fuel regicn (a tall regicn will support the ..eight of six RCDsl. This addi-
-w.v.
- - . a' i s. e i go- . -=_e.'w'c 4
s ."a_ o
~~
s c '. a_u - ,i '. u=o ee . e r '. v .~ L o" a C~.n o - .=u---.
-rw . ncc...-
r
=
u".". . . . -= life of the Cere succcr: blCCkS; hcWeVer, 3dequate margins are still main-w 2 . n m.
. . - ha _m. : - . ;, e. ov r . ,.
2-.
.v. . o v, e. ,w c_ ] r. e_
;. c 4. r n .- ..-rr.
u.~u c. .a- jg - e_ i r_ .--. . , e. -..i [.jE. ** .s '. . Ow .S Q..r ' o. r._.7 #,r..w. e2 7.Ow J foe,..jw.o wd. . **l p.n 3li. *Ir ,j'lm_ ac_re- a. E. u w s .R - . - . w c on b Jad?
..a. . . n c l. .e. de *e e v.. . -4 ,.- a.n. 'a _a. .r. . e.q_ p .. s. -o. ., .*.v-- O
'. n
. ea. e. . r. Ja E. ea . s . l 'l .s .E . .~ .2 'a . w. r .a .t. d. e b Lv_-
n o t e i c. n '. :. ;i s .r. . 'v s (e_ s..-. . e a .. .- e 2. .,s r c, e. . e 5 . - e. v a. e. .
.~. - ' C . . b i C C.?, 'i 's '. 9_ .
4
t
=
a a A. .cn. a r.r--{ . n.n,xLv. e.L .c s - Tm_ wo .a. u...4 ,o . e. .w . . . n_ o. r. . -. . , . .m.
.w,
... . , , v,_ - s_ o. n_ . , , . n_ ,. e.or no..=r.4
. . s o.ic t
- o. e. e:. r.t - en r . ant ea'.a./' *N. o s . = .". . c i n e - .o .o. .o r ..i n a. i #.
a
.' . . .a i . r _. (
, 1 ) ... ..
. . . " a. i r cresence ,.n any way ,invatiu,ates :.s.e assumptiens, analyses, prceablaities or.
events, cr conclusions of the safety analysis presented in Chapter XIV of the r.e.nn , anc (2) to c.etermine it. t.ueir presence intrccuces any new events wnich mign: Ocse a threat to the health and safety of the public. It is concluded that tne acdition of the RCDs of the desicn cescribed in -his recort. dces nc* arrect the r n.-n sare y analysis ncr intrccuce any unreviewed safety issues. 6.1 Ccnsideraticn of Uotential Incac cn FSAR Charter XIV Events ine sarety anc transient analyses or C,.ap;er X..,, 1, were . . sys;.
. . ema:1cally reviewec rcr potential Troac: o r t.ne nLus on assumo:1cns, ini:1ai ccncitions, ccnsequences and conclusicns. As summarized in Table 2, this review shcwed d
th = *. '.o* a. R..~ "_ a #. #. v r . n ^. s '4e,-o i 'i#. c ' n *. a. #. #. c' e. . . n *..h . s a_ a. ". a r. ."_ .vr
. a_acons die-
-.e.e-sa 'uc ica.
c 4. r . . . . . , . - e. n 0 :. u..L. =. e. s.e.n . ., 4.nma . . 4. c, a- ;. L ,.
, r u. , .:. . u. 4. . .... . . a- . . - 7 . _ . . ~ . . . [ O. e. r. .~.4 a . i. d. . '. 7. ) ,
s all dis:urbancas listec. excec ear:ncua.<es. cirectly affect only cccconents
.e.-..en a , =_c_- .->.c.-
- 4
., , . . . - , 4 -
....-. ~i .- .s ..... .. ..- e.. n. . .- c .-...c
. . . u s. 4. . . .. ..., .... .. . ...
sistent wi-h the seismic design critaria for the plan . Therefore, the discussion regarding adecuacy of structures, instrumen;a:icn and ccre tc seismic loading cf Section 14.11 is not affected by the presence of the RCDs. Reactivity Accidents and Transient Response (Section 14.2) discussec in the FSAR are likewise not affected by the RCDs because, as discussed in
.co. . .4. ^e n : . i . '1, 2 ove. '.".a_ .~se
- r' .do no -._'.:' a,cwer s.ie.r'm"" . . . .
'. ens, .ar.r..^i .c worths, shutdcwn margirs, or ,sine:1c parameters, _.inerercre, analysis or tne limiting rod withdrawal accident remains valid. The RCDs also de no: affec: -
.S4 / . +wy c- r. .c m 2 l 1 c..e a e e C r . h a_ s_s 4. . . . w. e. : n' o. e_ X C .so n . s .e a.ns- w. 1was 4n 3 4 n o +w.n *o l a l ro. m C.1 r . . . . . . _ . -
Sec;icn ~,2 wnero t r. o feilyre of nro c: r 7.n re Orne -sv i n * *-air r a s- 2.d d 4 a s i scurCe 07 negative reaC;1vlty anC PCwerj.wistrigvutiCn perturbatiCn. those events describema
--.e ,
g e
.or in r:se _ectica 1. ,.2, incicents, ncne are
.= d ". c. e. '. e hy a . a. c. . =. ~. " y' s t. he
- o. =r.n=.
,. .' n =s w" c % , ..".a. =. ". m, '. u = '. '. c .n " r. a. nm, r .di o c_ ~ ~sv'i v' ~.. .a cer,,ection and misalignment as reTerencec in cec:1cn i*. t re m r a n n _eecticns 3.3 and 3.8 are enhanced by the use cf RCDs. Other incidents addressed in Section 14.3 do not involve the reactor core so tne RCDs have no potential effect.
The events described in FSAR Secticn 14.4, Loss of Normal Shutdcwn . Ccoling and Section 14.5, Secondary Ccolan: System Leakage, wculo not be affected by the RCD since, as discussed in Sections 5.1.1 and 5.1.2, the . . . nuclear anc tm,ermal/hyorau. . tic perrormance or tne core are nc sicniricantly
. .a. w.
. . y,. a..x. y.
. .. .e -% Or,5 .
c . .m- .n. . . L , c. 4 u- ,.4. s. e.. n. a. .n. :* .n. .
- c. a. C . '. - n c 'l l . ~/ , U..* i. ~. ..' ' V I. v.^ l u2 n I. ^. _^3_,~- p , ];.o.
e en "s.4...
-si . e f c.s. e. sh 'i a. 2 c. . 4.c a .e. . , 2 .r. g 1. 2 .1. Cc. - c -; - . . n c r. . . t_ v.a n .- - v. r.=A. .
C 4. - . .
- 'l ., . 4. r. n.
.s a .ma. Wr ~.. . z. e. e. r. . m= c, e c..~e n. z z _ =_ m_ u-. - ;. .~ 9 9 a. p. ..-~..v.-
4-- p r a. .e. c r. 1. e :. .a .. ~. =. ?.,..n. au
- *1 a . '. .: . ~n
]^ ew: ..-. e. r.....,.-...;,.4., .
... .i 3 .
, .". c -.
'. a . c. e ". . .'.-d.e'.r..'".4.."..
. v .I. t.
u' a_ _c e. . i _ 0 ".- . . . 4 - -..}..,..c -... 2 c. ...o w . wa - . ;- . . g s.c. ' e. i. n g/ e. n. . . .r 4 c. e. . r.e e .n . . . 4. p. . O. .;.p. 02. -c... . n. . ..' 7
will nc: be exceeded with the RCDs in the care and remain valid as acciden: scurce terms. As noted in Sec:icn 5.1.2, the RCDs do no: crea e flew dis-a
.. ._. r , n c c ,. .s. h 1 u. . .w .~J.s 1 In.,,l.s
.u uaw+m. .h n. 2 ..u , , l . f, e. 4.. e C :. .w. a. _ . . , . .si.n. a . o.s - mce-. -.4.u.c.s.
- i. r. ; 7. . . P. 7c - . .'.er 'i .'.". .'r.. n' nec.'a...,
.. n. .
c ,.na i ly, :.5.eo e.scussicn of the .3 acid Deuressurizati onh-.icwccwn dis-cussed 'n FSAR Section 14.11 wculd not be invalidated by the presence of RCDs. ihe RCDs cannot be lifted and beccme internal missiles by the pressure d i f f a .r a. . . '. = '. : n d. #1cw. for.ae d o.
- . . . -". a_ 'f . - c. d. . d.". .-i.n. g u.h.. a--s e e ". c, n 's ' c '. .e d'.. ro.sau-i
. . _=-
tica even cescribed in Secticn 14.11. - As discussed accve, tne prr =ccicent e
.' '/ e. n. *. e u . . _ c c "_ _=r-r- 4. r . . '. ., . '. . , . c. +. 4. . 4. y-
. 4. - .oc - . =. u~ c. . =_ s. ';v . .". n- ,Cne
- a .v . o. .- =_ _ c". n as in :he FS*R.
~herefore, the introducticn of RCDs does not invalidate the accident analyses cc:cribed in the ?SAR.
6.2 Ccnsideratien of Potantial New Ccncerns Introduced bv RC :
- a- c v. - ' n . ". u' 'i "T^i.-
Tha. ... ~ ~ .. ~ 4. v' a_ d_o". a r '. . n .n .= ".- a. " e = n c v^ u. -ei u+.' r a_ d_ #.. r= r - us. o
+.2.., ..:. .e- _, 3 :. ;_ .g , m ...v =i .. ,. . . . a.-us o u. .. . . a.. . n..,. w e.=_- .
_e - - =_. c. .. ;. s. .... r a_ _c. v i , . ,e. :i n .u. a_
...~. >,-,
...-- n/r-.u__:.. .-a.
. ... :.,:.i...,
u,. s
.um=.-
. r c. ca.c ..c
.o c,e .uc..- .a . ..
. a. e. .-.n ,.,.... -s.
~.%.-.
. . . ,c. a. ;<a
. . . c. . . . . = ,. e :. = ./. issv=_e
. u . <i n .., . m a - c +. ; . . a =_ . .. -.~, i c y. . . ., n ,o . c. :i +.a
- .r.~. .
c
- Though considerec increcible, one proposed failure mcce is the break-p . . . . .. .
077 or a . tower 01n or an neD. i hls couto leaa. to a pin ratilng :nrougn tne plenum and reflectcr handling holes and bein- inserted into a rirst rcw rue elemen nancting no,.e.
,a.h11 e tn. .is wou ac ccnstitute a negative reactivi y insertien, the resulting local pcwer decression in the fuel element is less
+ 5,n i = n.
*w
. . . e. --..g..
c.. . e,cacm-es. ow. .s.v .u . . . n. c i c...m.n o . its. 4. e. c. c. . a c. . '. s r. u . .=.m e="avf- +
. .,c=rn .- .=. n d d. .e m ' . . " . ' .o- . .H. e_ r'.o. rr a c '. c_ ". = n. . .- .- m_
- . - c 'm= s r e_ "_ 'r ...a. F c A P. . .
his same ra11ure mcce could ,ieacsto ,liticulty in ruei nancling since i t.s.e pin ,in :ne nancting nole wou..ac prevent inser: cn or :ne norma,i grapple.
.o c.n s event, n a a.: iuei ncnciang wouic ce interrupted and the use of scecial tuel . . . anc. ling macnine attachments would .ge recuirec either to remove n
the brcken sin or cick uo the element with a tcol designed to cick un blocks with car. aged handling holes... . . . No increase of ris.k to :ne puclic is assccia:ed with any a,uncrma.t tet nanci1ng opera:1cns, tne use of special attacrments to tha ,ue,i nancling machine wculd result in scme accitional perscnnei racia-tion expcsure due to increased time spent fitting this equipment to the handl-ing machine and increased fuel handling operaticns. nnot,er raliure mode w.nic . h may be postulated is the migration or an a RCD after being left uninserte-. at installation cr somehcw workirg it; way up out of the pienum elements. It is noted, hcuever, that neither event accears creCible.
~4. T c. +. , . - c.
F n n rn. cw.0 d u ". a. c f e r #.o- ". A. ". . "i- . . " . "~c OI D"a N. i l l. -_^
. e r. *. ..~. . ' 's' ~- .2 r C ^. r. ~. '. *. I l a. d.
j . *.w.g ..s . e. .. .sp . . a. .r 3 .r. J. ._, n_ 'i h.anu.4rn s1 ioy 3r~ oo
,.1. . . s. .n e. . r. .. .."i^"r#..=.~-3 1 1. . 4. ". #Wi. #'^
..w'r
-..s n w .- e. . . . D ne i a ~e -.se'. +2 < ..p r.e. e e. . u .e -
i - uk.. a4.:rna.
. %v . -- .. .. 4. 7_ .. . T . 4inC' 2.. e. e. 4. n.-e c .e .o -. ' -
S a_ . , e p. .. u c._ _ . - , .-, . . r..u c :. ? I c. . . L. . a . t. . . c...
. . .- . u.. . . a e s. . _4.Lrb-
. i s h. . .t,. . . . a.
r: .- _ .w n. r
.a..~.. --.n. . .t o. . . ,y -.g..
--e 4 3 , * -
o n_ . a*. oo. .. r. 4. . c o_ r.. .. . I a_ .__.a _ .s e.-r..-- _ . v. .' 3 4 4. .e.
. .- r. c e. . 2 .
f = ... .. ...q:* -
- e. ' ;. .. z_ 4.
4-
. , ,s,. i i a . . .e m 3._ +, ... g n 2,.- , . . . .
3_ '. z . . n e. . =,. = .
. . *._ '. .a .n. p n. ,
i d there is lit:!e chance of initiating reac::r creraticn witn an uninser:ed
.~erd n.n s.o u. ..u.,. --
mero. Second, the pins of the RCDs were desicned to nave maximum length, ccmcatible with har.dling recuirements, as weil as dry film lubricated sur-racas. inis was done to avoid tne possibility or :.geir ratcne:ing out . . . . during normal coera:icn. 5.2 *bnormal C:rditicns Structural Evaluaticn Seismic evalua:icn of the : re with RC s was performed fcr a .05 g Ocera:ing Easis Eartnquake (CEE) anc a .10 g tesign Bacis Earthcuake (CBE). The CBE procuces in-core acceleraticas of .19 g, anc the CBE produces in-core acceleraticns of .25 g (Reference 2). The seismic icacs were :: bined with the normal operaung icacs to ce: ermine the structural integrity of tne core uncer abncrea t conc 1:1:ns. ice analysis shows that the core with RCDs will nc: sustain any d; race nor recuire replaccmen: cf any ccm:cnents follcw ig
, cre a r o. r. r. . . a.
. '..".n. o. . e. . .. v"i .m, '....e 2.a m, l f' e, . 4.ae ...~../- s .'. s. w .= i '! =. c "w4n- .-ri . , = . 4-d4 n c, i s . . .o. . .
C s'.o 2 " i i o. o f 9 .." #. ^. r~.ai n.c ; i w ~,. e..' #. n. . ,v #. ". ". . C . i. ~.. cI
. '"..d. 'a.'.
^^
..v ~~~...'*.""o"*
.. a . 'o"'.l l. b
. e.
ica:ec to failure. The adciticn of the RCDs ai:ers tne seismic loac pa n :nrcugn tne co plenur elements sucn tha: scme of the 1cac is transfer ed y the RCDs thr0uch the hex reflec::r clock keys :o :ne core bcundary. This increases the 1cacs in the hex reflector block keys and procuces adcitional loads in the RCDs. The additicn of the RCDs does not alter the seismic icads ccmouted in Refer-ence 2 for the core blocks, dowels or core sucocr: system since they do nc: alter tne basic assumations on which these leacs were c mou;ed. The load patns thrcugh the cp plenum elements were established using a 1/10 scale two-ci.Tensicnal plastic modql en which pertinent sizes anc gacs ine mcces in 1 cates th.: wnen the core is acce era:ec in a were scalec. hori:cntal direc icn, the RCDs restric horiz:ntal translaticn and cause tne fue,i regions to pivot about the n,Cu, pins. ..inis pivoting closes the gaps . . . . between the fuel regicn; and causes the leac between the regicns to be carried by c:mpressive forces betweer tne blocks to the bcuncary. The lcads frca :he fuel egica: in the intericr of ccre are carried crimarily by ccm-pressive forces between fuel regicns. The maximum seismic loads in the RCDs and side reflector block keys were shown to occur when the direction of the seismic acceleration passes thr:uch the center of the core and a five-fuel-column region.. In this case, six RCDs carry the loads from one five-fuel-column regicn and the three adjacent seven-fuei-column regions (Figure 1, shaded). The maximum seismic
, RCD icad is 2.0 times the average distributed iced based cn th assum :icn .,
that al.l -axu C,s wi,il no: pickuo the load simul:anecus,iy but tnat all 6 w1;i be effective in carrying the :ctal seismic leading. The maximum seismic icad 2-in . . . n. d.eX .- o i :. 3. e. . . . w .vwl e .g i4 oyv e. je . =.~ ,1 . u u- .. . o. e aeu .e.,.jc ,2 ivo". 'i n . . . e P. w~rc ' ag -lu"a the siismiC ICaC ?"Om a hex re fleC~ ~ r CClurn. The seisTic ICad Carriec cy
' . . :**c o: n d i . w:. .m. ~_; e ' a c. . . .* b l.sve " .>. .," v .. #c
. . . , . is r".~...~."'.-d. v" d.'. e d. " . . " ". ' l # '."it'. ~'s" v"#.
. . i . m
, ' --. - . e ~u p
- u =. m. e. .,s e.n. I ~i a c. . . i w.. . i-.? es s v W . u. - n. . ..e. :....
sees s
. p 'l <.ci.b..e. . I i 1. -e....'.e. = e. y Tiu%
a e n.e. n .es C2rria; througn 27.9 C0r9 su?por: flCor Thh Taximum RCD seismic lCaCs Wer9
.---~s. . a. s. . v- 83 _7 . , c. n. 1%. e...- ...
.~u -
. p:r _3 . s. . _'-..*L.. :-
- ~
cr. 7..
.w - .. ' n i ri; . O.c .
C.
loa,.s with :.ne ncr:al coerat4.ng loads frcm .eecticn :.3 yielc.s a,c:/ 1s. or CEE and a,437 lb. for DSE. The maximum reflec:cr block key seismic leads
-..-,..-s .- , : =n :,- s
.=..<,. . . . . . .. .. .e, .. '.s.
i is. o.== ;n
. .,,:v=n.
. 1s.
- -. ..= . = . c. e- _ .- o..
. i - . . ,- . ..,c;
- 1. ,..c. - . a .. .a.. .w .......] p., '. ". . . 3 1 v a .s f' ' c' i d.e . ' . . :-
. . . o.
, , -e ur ., 'b.
i fo-. 0cF. a.n c a , 3 4 ', "i v . . icr cst. The mocel indicates that the Icacs in the interior of the ccre are transferred primarily by ccmcressive forces between fuel regicns. The RCD seismic !cacs in :ne interior cr the core were esmou ed by conserva:ively assuming that one cin actinc percend4icular to :.s.e seismic acceleration vectcr - r r. 'vc..e...- -"e wo rand...
- #. r . .. r e *. = .d. g .= b c u ~u ' ' . . - . " . . . . " . . c - - . ' *. . ~n. i s m'e a- "u. . u. - d.v.
. . . . . a.
produces a maximum RCD seismic load of 1,52C ib. for CEE and 2,070 lb. for ue:. c.cm. .cining c hese leads with the ncrral operating icads yie..scs 1, .,0 1g ., for OBE anc 2,4E0 lb. for DEE. The icads and stresses for these conciticns are summarized in Table 1.
-..o. . -o. .e .J1. * .- e. .". c w.
~
. -"'- . ." a.
w.~w . . . e . . ' .s e =. e .=. r. a. .c ". .- e. . .'. . . . '. .' I 1 ;" ". o '. c'a .v 4. e l
. . i s # r " v o" .". a.
A' n
-vore.d.e an cnwa .Or" sun i..e. u-
.- n. . 't n e. .. s- - slown E.. nys a c... . .N
~ .. ~.c.
i o. -~Jcrrsnin u r. C' i. n g .e ..
. r n. e 3-. e n ( =. - ?. .e v
.e - n .nwnn m u- .c .m e 'e cW .v i e 'i d , n. e. r. ~a c~ . .r e. e... ,
.:: . . . n. e, n. ..e..
^
u1- . ... u. .s..~..~..z
.n...
cuter ?in ficers reach yield. Mc'..ever. One pir wi'. l nCt fail un Cil all of :ne fi k a. re. i.n a er-vs e .c c .- . ". C. 1 F A .S C 1 .". i. c. . 't C' I'. . .'.*#
- r. . 1 . " . " _ .#i. ra.
- #e 3..*..'.c...."'.
. . ^ ~ . . ' . . * . i.
N X.'9 3.ee 4e. ] c ,.:e n : nyj n m..c...o. .n. . J.w+ p . . . o. s j a.]h.,.
. . ~s .q i n c_ e 4 h u.c/. 4..m... 1 .q n . . '1..o. . m..c. ..o.n. .
7r0 in-ib at tne councary anc ,i t ,:v0 in-ib in tr.e ccre interior. .his s. is .18, u . . incicates a minimum margin or sare y c; 2. e percent .ercre ne 01ns will ,.all. u . . Ccnclusicn
--an2 #. m= * " . ' . . . - g- 1 c r. .
. .w.. . . . . u r '. l , e - .u c. .- # . . .~= r. c a. a .n c- 1. v. e. n. e.
-. u.m.'. . ri..= d d. . o tnis qafety snalysis n,eport leac. :: :ne ccr.clusica tna: *ne empicyment of the Regica Constrain: Devices in the For- at. '/ rain plant does not adversely arrect :.u.e sar.e y .eru toe plant er ris,t to :ne neal:n ano sarety or tn.e peclic.
Table 1
SUMMARY
OF ltAXIMUM LOADS AtlD STRESSES - lioniul Operation OBE DBE Yield Component Stress (psi) Applied Max. Stress Applied Max. Stress Applied Max. Stress 760*F Load (lb) (psi _) Ioad(lb) (psi)__ Load (11)_ 1 (psi)_ iteflector Block Keys 1,167 2,290 3,857 9,510 16,100 7.570 4,847 (shear iniscrew (SA-387 G22) threads) RCD Interior 410 2,920 1,930 13,700 2,480 17,700 80,200 1101 ts (SA-453-660) (tension) Boundary 1,167 6,550 3,557 20,000 4,437 24,900
^
RCD Interior 410 24,200 1,930 114,000 2,480 134,000 134,000 Pins (bending) . (Inconel 718) Boundary 1,167 36,700 3,557 111,000 4,4137 134,000 A for these conditions, the outer fibers reach yield. The maximum moment t he pin can carry bef4'r all of the fibers reach yield is 19,500 in-lb (hinge moment). The maximum DilE moment is 11,200 in-lb at the bou, tarj and 11,800 in-lb in the interior. a
Table 2 P01El:TIAL EFFECTS OF REG 10!1 C0llSTRAlf!f DEVICES (RCD) O!! FSV FSAR ACCIDEllT PEllETRATIOllS FSAR Chapter XIV Event Potential Effects on Event Analysis Due to RCDs in Core 1/. 1 Envi t onmental. Disturbances 1:a r t hq uake flo effect on FSAR analysis; ftCD design compatible with plant seismic criteria. Wind effecta , , i Flood 1 I r. , 11 cffect fra:a RCD presence. 1.in Is l ide:. Snou and. Ice 1.'. . ! React ivi ty Accidents and 'l ansient
Response
,; Suun.n y nf Reactivity Sources ' l.'x c e:, s i v e r c~n v af control poison llo ef fect from RCD presence, l.os of fissi..i product poisons g
- 1:a.. i r anguinen t of core components Introduction of steam into the core 'jiloeffectonassumptio'osofFSARtreatment.
Siniden decrease in reactor temperature llo ef fect from RCD presence. Rod withdraual accidents 1/ 3 Incidenta incidenta Involving the Iteactor Core Cross references Ch. 3, RCD should improve eva lua _t i on. Coltaan def]cction and misalignmant 4 i
' l'ue l element malfunctions r
'Isplaced fuct ele = cat jilo effect f rcai RCD presence.
l blocking of coolant channel i S, , n
. . . . ..,........~--~%.--..... ..,.u,....__,,,,,. . . , , ,
._ TA Bl.E 2 (Continned) l'o t en t i a l Et'fects on Event Analysis FSAR Chapter XIV Lver.t D'se to HCDs in Core Contcol rod malfunctions -
11 0 e fI cc t irua RCD presence. Orifice nalfunctions fio effect f r om HCD presence. ' Core support floor loss of cooling fio effect from RCD presence.' ~-~ Incidents involving the primary coolant .
- ys t em
'I n c lit u n t t, involsing the control and in.trumentar. ion system Incidents involving the PCRV luci.lents involving the secondary No eff<cct frcm RCD presence.
coolant and power conversion system lacidents involving the electrical
, t em llalf unctions of the helium purification
,ynten
[I flalfonctions of the helluu ntorage '
.y ; t em Ital f unction of the nitrogen system i t, . 4 1 o m, of Ilormal Shutdoun Cooling flo ef fect f ro:a RCD presence, i.St
*:econda ry Coolant System I.eakage '
St cam leah<, outside the priniary coolant s system teal, i n:. i d e the primary coolant sys tem fio effect from RCD presence. (moisture Inleakage) i L , S t e . :a generator leakage accident conuequences A
~ . . -
..-_ TABLE 2 (,ontinuad) 1 FSAll Chapter XIV Event Potential Ef fects on Event Analysis Due to RCDs in Core 14.n Auxil i ary Systeni I.cakage Failures involving the helium purifi-cation system 1.oss o f both purificatio trains Failure of regeneration line !!o effect from RCD presence.
u/ simultaneous valve failire and operational error Accidenly involving the gas uaste t.y s t em Fuel handling and storage accidents !!o e f f ec t or consequences of event analyzed in CSAR. g Fuel handling accidents ' Possibility of loo,e parts increases the probability of interf erence vi th fuel ren. oval f rom core. Fuel storage accidents 14.7 1*rimary Coolant Leakage ll0 effect froot 1KD presence. 14.8 llaximum Credible Ac<.ident flo effect flom RCD presence. 14.9 1:a>:imum llypothetical Accident h" I4. th 14.1D lh it;;n llas t s Accident flo . 1 !!o effect from RCD presence.
" P e rn.a a e n t 1.oss of Forced Circulation (1.0FC)"
14.11 Deuinn Basis Accident flo. 2 "Ranid 1:o effect f rom RCD pi'osence (i.e. Ori fice plentmi e jerent Depressurization/Blowdoun (D:iDA)" does not levitate and RCD is less,lil;ely to levitate.) a-- - - - ~ ~ - - - - * ~ ~ ~ - -
a
".e Te ro r.C S S
- i. u. sn. Ch. j 3.
is
-=
cr. A- A. 7. r3-n-. w " C,Va r..'" , " ". ". .i #. # es .". 4. "w "s U
. 'w .f '. .". o
- P. .C.II- Cv"..DU'o".
. - P'".-
O r 3"i, a am niOs/4, J u ,i y ,1 c / s .
,, tructurai.nnaiysis or" .DC"a neactor internals,"
- 2. m^**r^.
u 'i-,A
- C_ 's 2 .
1-C ,
--- ~
. I %-
, l. 'T
. ,. ,.,, ~~~;:
* ' " ' " ' I
- f .-
- S
_ ' ' ' 4- ,f
'; l g, .(l - ** ;-'
- * ** ' C ,) ig
. === y = , j :'g g:?
C; _,
$ "- l l -' s
~ - > 3
~ ,:
C-- ' ia m 5- [ f, $ & 1.".'
* ~
-J l f .s;<, -: ,! 3
]-- ; I $ :=
9 - b:- b ~ b-~- - C~~~~; ,
~r ? *;**
c . ,~ p k
- M._5' _. : ~~ == *.
,.,I.' ,
sf _.-se . . 2 ~t a
-\ *.
h!.S.
%,,%. &.2 3 C
~ t >a >. * * '; 4 i:c sc ~
n P.;f=N: q C[
/ .; ' O /h . 5e
- -- ~ 'h. .a ,
' ~ = ,
J% . [ c h' .:-: q. L/ P;i;3.! i
. -m=== mj -- -- .!r-c .. - , 4 . . y_
%s p:l
~
,- - e . % g.;
i.
~
E ~ M q'q s ' n8 ,; g%., i -f ",f4, N% ^^
->\ r-- .
5'- f I w " s Lc' H !;~.r'; J -5 ~'L '
%. ~s : > .
i..
^n ,-
.\ '%.N-
-- A ,'i*'~~---
g L - Ieo e':s y-/ C .1*.: geo : % 5 .: ./
/ '
., s
\ \ t
)
%sg~\ >:% s/ ; lL.v.'/
s .
.- 1
/'
\
{ ,. s j' !
,1
\ */N l6 Int -
Ii)i,,.
# ,[ \s ;
"\; -c
.'f'~~/' .;" b. - A '%
,= V -* -
I' ;? I 5
,,i ]
./ \ #; s' s;\ d: m ~/: ::ll #
kl !N \.- % n I '2 ' / [; </ ~ - ," j I a
~ -_yi v: \.
/ ,-
r*^\ ~N%~ I
/ ,. / ,
\ s
-?
s s 7 f f,e : p *,s e ,\, m , 1 p
~
N ^\ -N N* a?/e s
'% '\ ,, {,,,,
. .~
4's
/
g .o ..
-.'3 -kC \ ' ,% '//' - o*
,l) \/
s.j 'N a ., s .- /I ;
,' % N
- c. -
~~
^
-' ? /\
j l% \ g l <:.%)
- - ~
I' .- f%. %
\A' ,%s
, ~- ..? -
.v /%ej
^s s ^s O': '
y? % ',/ \ ' (. /s yl ' 4 1
, I S
%- t j g
/ m;/I
, , m I r a**** r I . t ,
5 -
' , *. fv s ; m *n. C _ % s p ,
\ {/
s/ ., 1,,a*- ;c -
+,0 , Yc 'J-.' ,f'- s-0 N 3
./ T- I -* ,
f ~ ~# - e ? i : ,- ./
+
,"'NN,,,,c ,_- ,; / *;
.\
-g
/ / I. i -
a N -
,% -N 'w' . i . s'
% m
/' j Q'y \p N .,,, 'Q -s \ %
/
e u- / f s/ . I'
/ i{
/g 4..c i-
%.-~\ q e-- NN W \ ;
/ ,3al i 7 \ '. e ,, j f I . ,-,,.,, oi/ '
\ k t '/ /~%lt -M/}
,/%'s . s: . / o ~ ,
I ,ce , / / UkM
? f - 4 3
> s, s
'd , s[ b%2-. o, , \a, ,
8 f/- s s,, [ / , 1
~
% 4./>
- s. l < N. - s , s ,s
%,- C
-~
\ t t s. %
o
/*
c\ i e1 0 e
'y oy
)s p j -
f N --, c -,,/ i 2 1 ,N/m? %..= .J, /:.
. =, l { y . , =m :o ? ,/ a.
\
l } (' -C %,?) a / 1
! - v 0
a \./
-y.- ' ~; , - G 1 -
s ~., ~
~, s '% 1 \V ..n / /\' j \C g
y/ \ / s .s '.,s % ,. ~j*2 i ,h j e - - -
/ .~
'-l- - :(e
- e
% c ' ~0 o\ / ~~ v\ -N O '..' (c"% -
',t c . '\ - - -
- e' 8 ,ls/ ", oN ',c s. , ~M j- /a * "'\
/ 1 : i / "
q1$/
/ t .-
I
- y. .,.,c':/ %ss \ '.G, %,=- -
/ ,-
jA
'w- ./ \,
,T N -
- f , fV h ^'v. s - , N ~
i -- 2\ (~- s s s j [/ c'; , bN , f4 f di N, , h
<' e' s /D '/ a i y%
/.',m r~'N, ,' 3 7'\s.o m- : L_
5.d,t,f ;* !, -sdph, 2 !
#a y "'. a/ f.
- s .
.f
/ \., e % -s \ds. ,. wb./ m.-.L g/ f
= ~ (~, i I
s Y n/ V, s j f I I .: l
.l ue i- 'i : i 7 - ~% c .-
' c..
r s -N^b / e- -4, \/..N -%
/
c \ ~~-4 , w/ r
.-~
f S5 *
~~~
& j' '- l r N '.g>
q ~ s ~. - a
% / > ::: i .
m/ , . ~
- U^ -~-./ < i r, e
~ .
' \
N, x ,- N ej , m ga . / , ,
'N
\ /
r - / _ m v- y
\r , % ie
' ,) '
, i W:Je.
= i ,
p ? ,' = ,~d n, %+ g %~ & s - o ,., ee - v/ '-!
/
?L*I U f.k t x,! x.. ' : j
- ~ hhs e g' h b' f ! / v'
~ ; r'
,' lft .
'm< . + V, . O( ga,/s\'o " M's ( se M ]) DcN--'sTT,3'r ' g'-'
O i/,' s /, tX,.V ..,
.xs sa i. g s s -N % fr. -
y
,e
,ej s'y/
s.i
-N s . .
- % ,.; j <</,4_cNN s p: N 3 N\N g'N w ;s ^:2's - % Ns.N>:Q/,'d a - s/>
.y c . rs ;
~ -: T' N.s,N x
-- N%sfs\'iN NN wn -.. s -
' - g ;.,;','s Nr {N sN%,TN'L
\ , -+ : ' s
/y
.\ ,; --s s
,\
1 Nf', N N' M /$ , ,s N C -[lwsd, ,ik.. ,, . g
.e, .,, 's x y k . n'X.
*s
-c . x,:
-5>
s , e:y
,$.'.'.s i x
E,g',)[',f:,'~\'.
\
N/ .,.
-(
.- s. ,*wg , g - ' N.,, ,, s,. /
g'. s
. e % s. ,- N - %./* / A , j" f
'N f V W ;, C l. l o
~ - -
j' '
' N,, , __' \' %.' _,
I e-
', pf' 4f
. h. -
'N N, s ,,
1 . N Ac '^ ,_ _ _ . _ .
,;. e
..i
_. )* .' I 4
'I l
- 4,
.a*
.e
< '."' }
i w A - m f d NM
<t 1
4
)
w- w n) .. s Q1 g,
.c n .1 - CCN'!ECT;'.3 RCD w
i
&" j
-e i
- . N, 9
- a I
, C.a...~ . . n ,. :. n 0 t. .~
. .,i m . . Li .: c [
M 4 2
- 1'
! l w. -* ,:..._...: _..-L -,
;y_ j . ,3m ,i~ ; .e.:.....,: ..
s .
;i e l .
, 1 o--
! YI .
t a
. Pd"I l .1 r -
! N Ly.
el.D. e .,'.'.'f-
. a N ,. . .ji . . a.
GR:FiCE :N LET CF E.'JNG A,f ',1 a . 3
/ W ;y> 1
}
/
/ My\ r2( '
3 1
-:-i m,' s C
. = ?\ ,/
;. ~,
., k ! 2
. L -,
c, .a.
., . G U,, :- -i-, . ., e-m 2 3
. ,.y.1 3 1
;..'YOK: \ j b f
n:i~ ...u c, ' i
".)'t.;; i y ,O,q{'
i' h. Okx '; 91. ,f 3$ ~O 3 ii
,j-' \
E,'%.E - c.,
% -i . t . . .-; i f. s . r -i ;i i--
\,i) i
' C :
KEYE3
- l. :
r ,. : .N. . . t Q p4.- x;M---vm.- w fit: 3 uis:q-
- :.g.e. . ...:..o.
A.e .m W: >y d n :: s ;is ; ; f2 9 ;o., - , .
~
2 l
. gd... , j,1, 3de i ;-hWM . e5.c' .
y e.a'a ~%.:-;:5.~,w .% -
- . f... , *' s i iz." '. t . -
a 1
\ N
,- (l-%'ih..
. s 5 a. . - 13 :
iWa.w m J..O'!!d, w. . Aubl.:N @ h , 1, ,1 i t* r, vm .; .$ s' sich 0 ! i lif 6.\ E] / d 4 ! gli:i) $ Se T: -l'.13 El o iP1 'O S H 1 j :s r - I ij !j !LW KEYE0 CONTROL N((d ,3 M M/ V ] -}' -j I hl!N33_. 3 mo ROD ELET.!ENT d N " M..s{E4!ijlilldett as M ii si-
'j ijl i jh*-hj [.J NX 13 dW.,' GU10 E ?!t' s ,;22 n 2 .: -j f. i j N
- J i
. - ; h,, i
\
a
.g s ue % ; "" x
\
av.- ,. ~.;PL:-' ..D _..: ..O 2 2 r i. n; . a
.On.3- ,4..-. , . ,w .. i. n. 4 n,a..c.-
v s
. .- 1. . ., a. ..
s,...r,,..., J k s - 4
).
-.i
'l, s
-6 J
4
~~
1
/wK~ v w
=n
\
i \ Q j
' \
\ \
. \ (L %
J
$ Ef'i?' s
\
\/
l A t ^ \/ J W 'I s I
.3 ~
i a tI e' s -
; - a-
.. ,- N L, i i\
(g . il . 4 1 it j , e l.' y , 'r bs a '\ ,q pi
,, , j i
%' ,l :
i 1 L *.
, j ':rj--~ D vC %g- /g i l) 1 (g i:-
_~ 6 t C ? % '1 \'u ,s i P'/ j '
,c
,_;. C C i C :' , 4 a i, IJ i
t ei //
=> ;..- C C iC ! 't i
~
"i /
fl '- f.. 'lb-,~vm C C c-c! , / i C' ! /
]
,i '
CCC : I I r t ..- t p::yt3 CNTA;T 72::3 l
}
.\)/
U ! l! i 4
%! 1 rutt c::t : 4; 4 .;
li i iL e i a
/ Pic o -cts 4 BH E +
l // / ! *lt I ? L;w
.a Q ;;,, g ( pLg , 7 j 'b , \- *y lf/ f'/ \s 1
j \s d, S s
/
. - /,
'i TYotCAL v.E Yw a y ggy '
a c$ l N 3 v
;4'd 4 - etiu ,nt - sN. : .i '
FLOW - - I y' . 1 i s e s, v N
- i a,
% s g
1 S r
- t
. . @s' .s
. s .c 1 q.O I
- j. :- P. I.;:
=g
- 3 !! ! i e: : E,- g-: :ii!!ld"'"")q '
J,. e
+
a : 1 )3!=,. " y
. , . . . , a. . t - r 3 l; i8 *!D 3
i s': $!$
- b. ! ! l I ' ! !!: [d ;
fE!' hi!! ! ! ! ! h f,
.; vz>
s .!
.. m i
' ' i ! l !. 3 Sl
. .: t,,.,,,.m..
/ v:u ! ~
s,.
- 9 :' p:
)'.
g H d .)S E P H l I $ g . [ '
.: c m.u'e- -
/
.i s -. - s . .: : 0 0 ~., L ;'i' -CLi5 :;~Et .;; SIT
- . ; . . 2 c.
e' d6
. _ - - 1
-~T- 7- j
.\ l CAfl110f4 STEEL PLAT i
, .12 S lII.
/
c-
.' q~ " ' " ~
Tr 101N.
,g ) ,
s s xes N._
's's gl{;lW!M; .~. II,
() 4.l's..Pi i$ i, -- J co . - s s' s f 4 bit). . %x- lm'A s s ll
.,s. 5'oh!#.s$l ./:s f.
l(( Nh'i'(:[ '(:s s[: [s';- s
:J5lljij : !it ! d ( !
x h'c; -
/- , s
',s's s , f ' ' ,A L __{ I __ __
I /
// !-
1 3/4 iii. SOCKET llEA0 SCflLWS - i l i i G 7/8 !!). ' ~~ IfjC0fjEl. 718 IIAl_F Plfl i 1 i I' l fj0TE; 3 PifjS AllE EullADISf AtlT
% ' Of1 A 16.!,ifJ. !!011 LillCl.E Pi AST.1 A SPR AY Clll10f.1llJM CAllfilDE CO ATING & IL>S L tib r i ca n t. -
_. AlTi. LED 10 PifjS Fig. 4 8 I SV Reg ion Cons t ra in t Dev ice - l~ levat ion Vieu a
k , d .
. ,/ \,
C d , C x 11 i ,N \- s<
- % N.N s -f 'T3
= 7. , \ -
N\ E C
, f )
) '[
'\. D. N,
- .:---- * =*
= I , - .j _ _ _ _ _ _
' , o I f I I I !
I '
~- d u
3 I
,,.o' l -
O
~
./ , o
~-
C , J 'i g 1 /
, /
o O
.,J 2 ' / w "t 1
t <, t
.l l .l = -a2 -
, , - <_ -4
= _,
\,> W'
-h; _.
, e' l
^
t I b .
..> .-.3 x
-(
,y e. -1 -
C / .
&s/ N <
~ f i y \
g
.n CG u
~
\g,r I_ , J t \ m \ r Z~
,\ i _.- - - - __
\ x\ = c f) f, c i 1 4 #^
~ ._ ; _ __ _ _ " - - .
E jl l '\ $ \ d,; ! ,!l .- n.
', ' \\o \,
\ \
x
\s E
i i ,
-7 \ '
)\
n >
\ , ; i.
\
l *
,\ $ A' r.
q , , -. t s' _* a-Q 0 !lf I ,7 '^
^'
y) 9, V O lll v1 l Q /, -g - E~ m- = - ~,: .i C o n .i i1 U q i.-- _ _ _ _ __ =re ll - % A y .f, . , U(,),eJ o 't;, s w "- - 9 '.- y, ; ' 0, 0 n r U ' Q ,m- a. x
- r. .- J L ' ,:,';_ cl- :', C ;,'
cp; - - l i
=),
'e a- 1 6
._____-- ~_
1
/
c - - 3- _ _ __..- - - ----- - y% __ I a E C w E W C C 2 w
.}}