a 2
Effect
The canis enclo host 3D nu gap s Introductio Nuclear spe expert orga final dispos generated i sequential e buffer block Model geom The drift w separation o far enough atmospheric assumed to between pa and superc distance for a) Figure 1: 2nd Petrus-OPEof
open-1 U KBS-3H alte sters with th osed in a per rock have d umerical mo state conditio onent fuel man nization resp sal in Onkal in order to a emplacemen ks and the su metry and m was assumed of host rock in order to c pressure i o be serially arallel tunnels containers se r the longest Entire drift deta ERA Conferen
-gaps in
I. Universitat Po ernative is c he nuclear s rforated meta irect effects del generate ons and provnagement is ponsible for t o [1]. The c analyse the nt of caniste upercontaine material prop d to be pla above and b assure the imposed at distributed a s was fixed t eparation is case). Desc 3D model m ail (b), super nce on Radioa
nuclear
P. Damians olitècnica de composed by spent fuel s al shell. The on the buffe ed in order to viding results done in a w the final disp current pape degree of s ers in a drift r shell and th perties aced at 425 below the dr proper temp internal drift and horizont to be 25 m (s variable due cription about b) c) mesh and ma r-container c active Waste M 33spent fu
1, S. Olivella Catalunya-B Abstract y horizontall surrounded gaps betwee er behaviour o analyse a p s of the degre way that is posal of nucle er presents saturation ev t, assuming he host rock m-depth. T rift (i.e., dista perature diss ft surfaces, e tally arrange see Figure 1 e to rock fra t how to dea ain geometr components Management auel dispo
a 1, X. Pintado BarcelonaTec y placed su by compac en the super . This paper particular ge ee of saturati not harmful ear spent fue some resul volution of a two differen in KBS-3H d The model w ance to boun sipation [3]). eight caniste ed (with 2º tia). The total actures pres l with interse ry dimensio s (c), and ga and Geologica
osal cont
o 2 ch; 2 B+Tech upercontaine ted bentonit rcontainers a presents a ometry assu ion evolution to organic n el in Finland ts from a T a nuclear sp nt gap state design altern was built as ndaries; whic After 1 year ers (and relalt longitudina l length of th
ence (e.g., f ecting fractur
d)
ons (a), canis ap/slot detai al Disposal
tainers s
h Oy rs comprisin te blocks (b and blocks an Thermo-Hyd uming two dif n.nature. Posi and it is con TH 3D nume pent fuel disp conditions b native [2]. ssuming 100 ch was deter r with empty ated compo ally), and the he tunnel is a from 3.5 m res is describ ster-to-cani il (d).
storage
ng the buffer) nd the draulic fferent va Oy is an structing the erical model posal with a between the 0 m vertical rmined to be y tunnel and nents) were e separation about 107 m, up to 16 m bed in [2]. ster mesh n e l a e l e d e n , m2 Figu Bentonite b 1b-c). A gap actual “gap” and Figure of block is d equivalent p flowed out f Part of the m the rest of t simulated. T Table 2 pre Parame Porosity [ Intrinsic p [m2] Water rete curve (c) Relative p Dry therm Saturated [W/mK] Solid unit Solid phas Initial liqu Initial Tem Notes: below constan law: kii accordi degree 2nd Petrus-OPE a) Instal ure 2: Supe buffer blocks p of 45 mm-” at Installat 2). To perfor defined as “ properties fro from the sup material insid the blocks re Table 1 pres sents the bu eters: [-] permeability ention P0 λ permeability mal conducti d thermal co t weight [kg se specific uid pressure mperature [º (a) Higher va the tunnel) nt at 20 m fr =k0exp{b(ϕ ‒ ing to Van G of saturation ERA Conferen llation state: r container separate bo thick was as ion state, ot rm this buffe “interface” m om block sw percontainer de the super emain uncha sents the ma ffer blocks d Table 1. y 0 [MPa] [-] y (d)[n-power ivity [W/mK] onductivity g/m3] heat [J/kgK e [MPa] ºC] alue of perme to take into rom the axis ‒ ϕ0)}, which Genuchten m n; (e) Hydros nce on Radioa cross-sectio oth container ssumed betw herwise “slo er block swel aterial, whic welling). Calc and the ma rcontainer (in anged. This terial proper rift compone . Material pr Host roc 0.005 1.52e-19 close fiel 1.52e-17 far field ( 1.5 0.3 r] 3 ] 2.82 2.82 2743 K] 746 hydrost.( 10.5 eability at far o account th s drift; (b) Intr returns k0 =5 model (λ: sha tatic-linear la active Waste M 34 c) on geometr rs and the h ween the buf ot” due to bu ling effect an ch shares pro culations at t aterial which nterface) has is a simplific rties at initial ents for these roperties at ck Fractu 0.00 at d, at (a) 1e-1 1.5 0.3 3 2.82 2.82 -(e) hydros 10.5 r-field rock m he network f rinsic perme 5.59e-21 (for ape function aw from 3.25 Management a Initial state: ry: Installatio ost rock and ffer blocks an ffer block sw nd gap closu operties with this “Initial s
fills the gap s the same p cation becau conditions f e states. starting con res Buffe 5 (Ta 5 k 5.59 3 0 2 0 2 1 2 8 t.(e) (Ta 5 1 material (i.e., fracture capa eability define r b =15 and ϕ n); (d) Relative 5 MPa (top) t and Geologica on (a), and I d containers nd the host r welling at Init ure at Initial s h closed gap tate” assume (slot) can b properties the se the gap f for both Insta
nditions: r blocks able 2) k0 = 9e-21 (b) k0 1.25 0.5 3 0.22 Ins .25 In 780 I 830 able 2) 0.5 from 20 m u acity to kee ed as per th ϕ0 =0.438); (c e permeabili o 5.25 MPa al Disposal Initial (b) sta themselves rock, which p tial state (se state, a certa p (now called e that the be be considered e material at filling proces allation and I Gap / Slot (Table 2) Initial state: 0 = 5.59e-21 ( Installation: 1e-16 (fixed 0.05 0.3 3 Initial: 0.22 stallation: 0.0 Initial: 1.25 nstallation: 0 Initial: 2780 Installation: 0 1000 (Table 2) 10.5 up to 100 m ep the press e following e c) Water rete ity krl = (Sr)n (bottom bou ates. (see Figure performs the ee Figure 1d ain thickness d “slot”) with entonite has d as a solid. the slot and ss cannot be Initial states. Canister 0.01 (b) ) 1e-24 31.25 0.5 3 02 390 .6 390 0 8930 390 -20 50 above and sure almost exponential ention curve n, where S r: ndary). e e d s h s . d e .
2 Table 2 Installation ϕ [-] Sr [-] Pl [MPa] Initial: ϕ [-] Sr [-] Pl [MPa] Results Figure 3 sh trends and process wa a) Instal Figure 3: Conclusion The numeri analyses. In rock resulte Acknowled This work w References [1] Posiva O [2] Posiva O [3] E. Topra Synthesi 0.4 0.5 0.6 0.7 0.8 0.9 1 0.1 Deg re e of satu ra tion, Sr (-) 2nd Petrus-OPE 2. Installatio Buffe n: block 0 0 block 0.369 0.807 -23
hows the evo minimum de s done in po llation state: : Degree of Initial ( ns ical TH 3D m n the current ed in direct ef dgements was financed s and Citatio Oy, Olkiluoto Oy, KHS-3H ak, N. Mokni, is Report, Po 1
Time from can
ERA Conferen on and Initia pressu er block: Cy interface 0.369 0.807 -23 interface 0.6 0.8 -18.5 olution of the egree of satu oints 1, 2 and saturation e b) states. Fi model for stu t study, the p ffect on KBS by B+Tech O ons Site Descrip Complemen , S. Olivella, osiva Report 10 nister emplacem Po ca Po left Po rig Po sid Po cyl nce on Radioa l states star ure (Pl) for b ylinder gap 0.99 1 0.1 slot 689 861 0.1 e degree of uration are a d 3. At Point evolution at igure results udying nucle presence of -3H design a Oy (Finland) ption 2008, P tary Studies and X. Pinta t 2012-47, Eu 100 ment (years)
oint 1: slot in front nister
oint 2: slot in front t-fracture oint 3: slot in front
ht-fracture oint 4: canister's up de oint 5: canister's le linder cap active Waste M 35 rting porosit buffer block Buffer block in 0.32 0.64 -37 block in 0.322 0.644 -37 saturation a approximately 1 saturation c) several poi ts after 1 yea ear spent fue actual gap c alternative be ) under a PO Posiva Repor 2008-2010, ado, Thermo-urajoki, Findl 1000 of of of pper eft 0.4 0.5 0.6 0.7 0.8 0.9 1 D e gr ee of sa tur ation , S r (-) Management a ty (ϕ), degre drift compo r block: Ring nterface 22 44 7 nterface 0.689 0.805 -23 t several po y the same is reached 4 Initial state ints around ar from cani el disposal lo condition bet ehaviour. OSIVA Oy pro rt 2009-01, E Posiva Repo -Hydro-Mech land, 2013. 4 5 6 7 8 9 1 0.1 Time and Geologica ee of satura onents: g gap blo 0.99 1 0.1 slot blo 0.3 0.9 0.1 -11 ints around at points 4 a 4 years faster e: 5th canister ister emplac ooks promisi tween the bu oject. Eurajoki, Finla ort 2013-3, E hanical Mode 1 e from canister al Disposal ation (Sr), an Distance ock interfa 0.384 0.936 -11.7 ock interfa 384 936 1.7 -9 5th canister. and 5, slowe r at Initial sta r: Installatio cement.
ing for furthe uffer blocks a and, 2009. Eurajoki, Finl elling of Buffe 10 1 emplacement ( Point 1: slot canister Point 2: slot left-fracture Point 3: slot right-fractur Point 4: can side Point 5: can cylinder cap nd liquid block ace gap 0.99 1 0.1 ace slot 0.664 0.961 0.1 Despite the ed saturation ate. n (a), and er sensitivity and the host
land, 2013. er, 00 100 (years) t in front of t in front of t in front of e nister's upper nister's left p e n y t 00
