ML071710205

176th ACNW Meeting - 2/13-15/2007

ML071710205
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.SUBJECT':

I:::::;ERT"IFIED MINU"T'ES OF "THE 'E'76.""MEETING OF Tkllilii. AD"I,I'I:S~OIF;K"~'

Y:.::OMMIl-'TEEI ON NUCLEAR! lliNASTE (ACNW) FEBRIJARY 1 :::3,.--1 E i,;II!007 "b"kne,i::rropose(:::l rriia~utes; o'f 'thniiis s~~..~ib,ject meeti~ri!;::r hwe heen certified as.I:~I~P offic~:a,l rcic.chrtl of

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~Certifiecl Minutes of I:hci 1 '76"' Meetir.r~{;;l Fet:)ruary '1 :3~1 5, 200'7 11!1. B;;:;~tes

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Advisory C:la::~mrnittee on N~,hcle;rr Waste SUB.FE:C:::"'iT:

I'RC)PQ:>SECII IMINLI'PES OI:.' 'THE 1 7GTM MEETING OR:' "'IIE I~DVISORY GOIVIMITTEE ON NUCLEAR WASITE (PiC:ilIVW:)

FEBRUARY 1.::3-,,,,1 5, 2007 I r::ertify that,, based orr II...I~I~ r'~iii~wkci!w of these r11711~nr.~tes',

and to the t:rest of !rr..~~y kn~r:.:~vwlecl~;;;~~~:

and bellel:, I kla\\tci:? ob~sewlecl nlcr s~.~lt::~stan'tive errcrnii; or or~~~isrsiorrs irh the record of this ~l:::~~ror:ee!d~rrg sr,.lbject M~ch;rei 1' Ryan, Chairmd1"r

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Date :

MEMORANIDUM Tc.1 M~chael T 13yrrn, IZha~rrnai~~

Advrso~y C:omrn~ttee on N~i~cleur Waste FROM M~chelt= S KeAton, -l'echnrcai Smretary Adv~sory C;olrx~~rn~ttee on Nc~clear Waste B,,

I;..,,. I 12RCIPOSED Ub1INUT'ES 01::::

'THE 176Tl" MEETING OF THE ADVISORY' C:OMMIT"TEE ION NUCLEAR WASTE (EII,C:::IVW

I FEBRUARY 1 ::3--15, 2007 Encloscii!tJ arle the prc:~pc:,sed rnir11.1tes of Ilk 'I 7'6'" mr.nec?t~ng of the ACNW. This dral:!: is bwr11g [:)~rcr:l'\\sded to give you an opporturrity tc11 review the record o~f this meeting and provide c;omrr.~ents. Your cornnients ulwill be incorporated into !:he final certified ~i'el of minutes as appropr~iatci:. Plti:ase provide your calrrecllions and comments to mc!!

Please note that these minutes are: beling ~ssued 1r.l I:li,rvol parts: (1) main body (\\illu~~;:)rkin.~!;;;j I:::II:::,PI~ 1lc:~rrn) and (2) appiiimdices The appendices we being sent only to those members \\i~t.rll:~ ha\\~l~?

reclu.~ested them A copy o~f' the certified minutes witki al::~~perldices willl li.::le forwarded to each rn~::r~!r~~l:~er cc: 1~10 li3-rcl 2: ACNVIIr Merr~

t:)ers ACNW' Staff

CONTENTS I.

Chairmlan's Report (Open) 1 II, Warkirig Group on the ACNW llgnaous Actmvity White Paper (Open) 1 Ill Semiannual Briefing by Representatives from the Office of Federal and State Materials and Environmental Management Programs (Open)...

M S

" 2 0 IW'.

Briefirrg on International Conferences on Dctrcommissioning and Llow-LevsY Waste Subjects (Open) 22 V

Possible Use of Moderator Exclusion for Transportation Packages(0pen) 23 A,

Federal Register Notice B;

Meeting Agenda C

Meeting Attendees D

Future Agenda E

List qtf Documents Provided to the Committee and Meeting Notebook Contents

CERTIFIED 411 0/2001'7 By MICMAE!. T. RYAN Issued: 419/0'7 CERTIFIED MINUTES OF THE 17GTH MEETING OF THE ADVISORY COMMITTEE ON NUCLEAR WASTE FEBRUARY 13-1 5,2007 1 he U.S Nur,lear Regulatory Ctrmmass~on (NRC) Ad\\,il~sory Committee on Nucleiir Wzrstrl (ACNW (31. the Comnl~ttee) held ~ t s

'176"' meeting on February 13-15, 2007, all (3ne White Fhnt North, 1 1559 Rockville Pike, Rockville, Maryland. The ACNW published a notii:;e of tli~s meeting rri the Federal Register on February, 2007 (72 FR 3879) (see Appendl,~ A) This meeting sewed as a torum for attendees to discuss and take appropriate action on agenda Items (see Appendix B) The erilire m~aetrng was orben lo the public.

PI, transcript crf selected parts of the rneetlng rs availlat)le In the NRC's Public CI~u(~,ument Rockin at One Whrte Fllint Nortt~~,

Room 1 F19, 11 555 Rockville, Pike, Rockville, Maryland. Gopir:s of the transcript ara available for purchase from Neal R. Gross and Company, lnc.,1323 Rhode Island Avenue, NW Washington, DC 20005. Members of the public may download tra~nscr~pts

from, olr review them on, tht? Internet at http:l'/www.nrc.go1v/reading-rmldoc-collrl at no coht ACNW nieml~ers Dr. M~ctiael -I". Ryan 1,ACNW Cha~~l-n~ar"i),

Mr. Allen G. Ciroff (A( :NW V~ce Ciha~rman), C"lr. James ti. Clarke, Dr Wlllliam J Hinzu, and Dr. Ruth Werner attended tills meeting Appendix C includes a list of other attendwbs.

I, CHAIRMAN'S REPORT (OPEN)

I:13r. Antonio Il::)ias wasi the Designated Federal Offici~al for this part of the meel!iri{;;/,]

C)r Hyarr, AC'NW Cha~rman, convened Ihe meeting alt 8.30 a.m. and br~efly revr6:wed LXutl agenda. We noted that the meetlng was being concll~ncted in conformance with tlie Federal Advisory Con7mittee Act. Dr. Ryan ask;ed members of the public who were present and wlshed to address the Committee to inform thcf ACNW staff ?,o that time could be allocated for Xherrn to speak I!.

WORKIWNG GROUP ON THE IGNEOUS ACTIVITY WHITE PAPER(0PIEN)

[Mr, Neil Colasman was ithe Designated Federal Official f'nar this part of the meet~irr~g

.]

Elurnng February 13-1 4, 2007 the ACNWV cor~vened a working group meeting lo ~;olicil tUcrn.h r~ients orr the draft White Paper on volcanism that was published in December, :,!DO6,At tk~icl C:ornmissron% request [SRM M060111 R, February !3, 20061, the Committee ha!; rev~ewed

( 3 r d analyzed the current state of knowledge regarding igneous activity, including the6 range nl technical views by experts and stakeholders A draft White Paper was develop6:d thr:~~t summarizes current knowledge of potential igneous activity at the proposed repc~sitory site

MINUTES 1 76rH ACNW MEETING FEBRUARY 13-1 5,2007 including ign~raous activi,ty scenarios antl their potenI:,i~~~I in-r~pacts on the repositr::)r'y perform~anc:::e The White Plisper also provides an assessment of differing professional views, inrcluding the wiews of experts representing DOE, NHC, the State elf Nevada, and other orga~nizations arid

~~takehollders.

[::)r.. 'lNilliarn k'llinze prc~'vitled opening remarks that set the stage for the working !j~roup r~~eetimg.

The Coraimittee has invited scientifically-based criticism and recommendations f'ior improving the draft White P'aper. The bottom line is to prepare thrs best possible report for th'e Com~rnissioa~.

Dr. Hinze no:#:ed that [:lay 1 of the working group would focus on the nature and probability a : ~ l f '

igneous actitllity at Yucc'a Mountain. Day 2 would focus on discussions of the consequences of igneous actiurity. Round table discussions would be h~eld at various times during the meeting to gain additional insights from the invited experts. Invited experts for ACNW included Bruce Marsh (John~s Hopkins University), William Melson (:,Smithsonian Institution), Charles C>onrno~r (University o'l' South F'lorida), and Sara Rathburn (C'olorado State University).

CJay 1 - Discussion c~f the Nature and Probability cnf Igneous Activity The working group meeting began with a series of' invited talks by recognized e.xpertsi ir11 volcanisrm, and including experts with extensive explerience studying volcanis~m in the south",,

western USA,. The first of these invited talks was given by Steven Sparks (Urriwisrsity of Bristol, England:), wlr~~o discussed the state of volcanology s'c,i,ence and eruption analogs for Yucca Mountairr. Plrofessor Sparks described advances ir~~

tfolcanology studies and predictic)n.r~,

inicluding spq~lcific discussion of the Soufriere Hills vc:>lcano, monitoring techniq~uss, and rnodeling and prediction. Soufriere Hills is on the Caribbean island of Montserre,t. A total c~f' 0.7 cubic km of I~rava have been erupted so far at this vcnI(:::arro.

F+-ofesst::~r Splarks reported an extrusior'~ viscosity of -,.'lCll'""o 10'" Pa-s, based c:vr'l analysis elf' the rheology of the lava dome, which he says is 6 to 7 t:,nIers of magnitude highe~r than would t:re

~!xpectecl for extrusioai viscosities at the Lathrop Writlls volcano near Yucca Mountain. One reason for the high viscosity at Soufriere Hills is that the lava has a minimum crystal c;onterrl: of 65% anct so~~netimes extrudes with a crystal conten'i: of 90%. This volcano displzsys episodic:,

activity over Ih,irne. Duririg the latest eruption the volcano has been active since 1995,. Professor Sparks described one: of the proposed models for the Svufribre Hills volcano, which eixplaiinrj rnuch of what is ob~served and mon~tored. The volci;arlo is theorized to experici!rrc::e strong overpressurG at depth due to resistance to outflow near the surface as a result crf high vi'scosity.

This overprelrjsure provides an explana'tion for shallo\\m earthquakes, ground deformationl, and explosive activity.

F:'rofessc::rr Sparks then discussed possili3le 'volcanic alllalogs for volcanism a1 '~'~..~l:::;ca Fv'#our'r'i:ai~~;,

and provided extensive information absut Eldfell er~..rption on Heimaey Island, Icni?land, in 1ED73.

This was a typical monogenetic (one tirne) basaltic eruption that was remarkab'lgr similar to what likely happerlled at La'th~rop Wells, in many respects,. The 6-month eruption b e g ~ n orn Jan. i!2,,

1973 with eabrthquak~as and the opening of a fissure, '1~i1:h a classic "curtain of fins" eruptiorr.

Interestinglyl, degassed lava was observed to be flowling as early as Jan~. 24'h a,! a time wherr the

MINUTES 176rH ACNW MEETING FEBRUARY 13-15,2QQ7 activity was a~,t its mosit intense stage, with eruption ~::a~luvnns 8 to 9 km hi'gh. E3y Jan,. :::?r'l'!"l scoria ccrne had already accumulated to a height of 180 m. During the month ol March Iisva flowed into the nearby town and measures were taken to halt this flow using high-voli~ni~;

sprays of seawater. This succeeded in lhmiting the distance that lava flowed in~to the tcrwn, and caused the flr:>w to f o ~ u s in another dir~ction. The @rk.rption was declared over in July,, 197:31,,

Clne of ttre m'ost important observations was that ex:p#osive activity and extr~~sion of degassed lava can he sfmultaneous, involving gas segregation mechanisms.

F:Yrofessc~lr Sparks c'o~~rpared the petrology and geoc:hrsmistry at Eldfell, L.athrop \\~Vells, ti3r.d El:tina,,

He noted tha!: the ACNW draft White Paper comme'nts that the Lathrop Wells eruptiori occr,.rrred at temperatures around 10OC'C,,

but he observed thalt this estimate does not acc::lc:)unt k'crr !:he latent heat of crystallira'tion, so magma that rises uy:~ and crystallizes will erupl: a!: higher' temperaturefli of 1030-1055°C. 'These volcanoes typically display an exponential dewease irr extrr.~sion rate. Other silmilarities of these volcanoes is relatively high water pressure ("-4%

urater) and the presence of microphenc~crysts (small crystals in lava) up to 4OC?/cl

~::;onsisting o'l plagioclase-divine-oxides. An important difference was noted between Heimaey and L,athrop Wells. At thair Icelandic volcano the tephra volume was small (0.02 km3) compared to the lava volume (10.23 km3), whereas at Lathrop Wells these v~olumes were roughly eql~i31.. On'e possible explanat,ion is that the! Icelandic study that reported these results may have undttrestimated the tephra volume because rrluch dell info t,he sea.

F::'rofesst::~~r Sp~arks showed how shearing experimenl:~ were conducted at Etna in1 1975i,,,to1 estimate the lava wisc:osity. These experiments using a field rheometer yielded an upper bc~und for degassed trach'y-basalt magma around 1 O5 Pa-s. Representing a rather c'ryri;tal-rilch magma at Etna, this should approximate an upper bound for magmas like those that erupted at Lathrop Wells. Sparks then described viscosity estimates from a long lava flow at Lorrcl~~~imay,,

Chile,, in 1989. This was a rnafic andesitic magsria, which has a higher silica content and shok.,l~ld therefore! be more viscous th'an the Latkrrop Wells magma. Viscosities were call:ulate!d usirrg a'pen channql flow equations. It took a year of flow tirne over a distance of 10 k,rm for the viscosity to nsach a level of 10'" Pa-s,.

F:)rof'ess(::ur Sparks then described volcan'ric blast effec#:s from the Soufriere Hills volcar"11cr1,.

,A.ndI although this kind of evsnt is not exactly analogous to L.athrop Wells, the flow cl'ansity ~ i l Sioufriere Hill,s would be about the same as the flow density of a Strombolian jet, comii~n~g ord the vent at L.athr[:)p Wells. He summarized his interpre1:ations of phenomena that c;r::~uld potentially be applied to Yucca hdountain: intense explosive er4,lptions dominate for - 1 weei!k, but with lava effusion; discharge of explosive jet at hundreds of m?s and up to 200 m8/s speed; weli magma stads o~ilt at ~~:lOOO°C:~,

then erupts at IC)30-1055"C wlith latent heat of crystallization; wet trachy-basalt lava axtrudes with a viscosity of -1 04-I O5 Pa-s';; flow front evolves to aa flc~w (viscosity 10' Pa-s) and blocky lava (viscosity = '1090 10 Pel-$5); the lava viscosity evolves; b~tiitlings clest,royed by aa flowtr; ar~d high-speed gas-particle flsows can be highly destrk.lctlive.

E3ruce Crows! (Battellti:: Corporation) described the v~o!~carric history of the Yucc:;'a I'blounkairi region

~rnd implicatbns for 1:he risk triplet (what can go wrong?; how likely is it?,; what ylllould the

MINUTES 176rH ACNW MEETING FEBRUARY' 13-1 5,2007 consequencsts be?),. HB presented background information about the evolutic:~r~

of' vcullcrar~ic hazard rrloda~ls, the settiing and volcanic hfstclry of then Yucca Mountain region,, and pra:,vided is discussiori OF risk-informed perspectives from modeling for environmental probRe~!ms. C>r. C:::roNwe was formerly a parliicipant in the Yucca Mountain project; he is now a "distant and interestecli olbserver..,'Y4,e presented a flow chart that outlined ths elements of an event prababili1:y calculation (i,,e., the clonditi'onal probability of reposi1:ory disruption by igneous ae:tivity'),. There has beerr a multi-decade progression in probabilistir::: modeling, from developme;rit of a probabil-istic volcanic: hazard model in the early 1980's leading to probabilistic modeling for complex:

environrrkentdirl problerns in the 2000k. iA current oplirllion is that volcanic hazard models,are riow relatively mature but that consequence modeling is still evolving. A remalir~ing challenge is to quantify avid reach agreement on uncertainty components.

Dr. Crowe dei~scribed,Ithe regiorial geologic and tector,~lic setting for the southwles:l~: Neviadab volcanic field,, where [::rater Flat and Yucca Mountain are located. There is a lorrg history s'tudies in the!! Nevada Test Site region, including m~.lll:iple decades of geologic:;: rxr~appirrg arid geophysical #studies (1950's to 1990's); drilling of a la~rge number of boreholes fo'r the under,,,,

ground testin~g of weapons (1 950's to 1992); geologic: and hydrologic studies,lor Yuccza h4ountaiw.i (lalie 1970's a:nd continuing); specific boreholes for volcanic hazard sl:~.udies

(\\,/H-,I arid

\\JH-2, pl[,.rs saaven new tioles drilled in 2006 to exploire aeromagnetic anomalies:);; and geologic' and hydrologic studies for Environmental Management programs. There is an ~~~nprececiented level of k;now'ledge of' the geology and hydrology of a complex geologic and h'yd'rologic: setting that has been partly incorporated in a Earth Visicln model of the Yucica Maountain site.,

Dr. Crowe then gave general descrip'tiolns of variourii; phases of volcanism in tHis regiorl,, starlirig with locationlli; of the silicic volcanism that deposited the surface rocks al. Yucc:~a IVlourr'tairi, b,le then described four c;yc'les of' basaltic vnlcar~ism, starting with the volcanism a~ssociated wi'tR-I the waning ~::,tias!e of the !i;ilicic pyroc1ast.i~ Timber Mountain,-Oasis Valley caldera cornple~c., '"rhi~i, trasaltic episode occurred in Miocene lirne from -1I:I 1.0 12 Ma and produced a Yarge volurme of t:kasalts (>3 h,m3). Rasalts also were produced durirlng basin development followi~ng the eruptions of the Black 1Vlountair1 Caldera (Frenchrnan and Ywn:c::'a Flats) during 10 'to 8 hila,. These posit,-

claldera basalts had volurr~es of c3 to <,I km3. Additional basalts were produced from 8,fS tcr 7.3 Ma showing ;an apparent decline in vol'ume. Dr. Crowe then described a Pliocene volcanic; cycle in the P4margosa 'Trough..,Apparent ages range! from -4.9 to 3.0 Ma ago, with a r:yclei!

cluration of about 2 Ma. The volume of basalt declin'ierd through the cycle. FirnalRy, he discussed the Quaternairy volcanic cycle of the Amargosa Trough. The eruptions occurred frown abo~~I:

1.1 to 0.08 Ma wlith volunie decline through the cycle. 'The volume produced aro~.~rrc::l 1 M'a was

,-0.15 krn3,, whereas t,he combined volume from Slea1:)ing Butte and Lattirop VV~ells was 0.0!3 E;m3 The question remains whether this Pleistocen~e cycle is over. Dr. Crowti? ~r~oted the!

1::)ossibility of a 2 million year time gap between volcanic: cycles with a mean clycr:le duratior I::II:'

,,-1.5 Ma. He illustrated various possibilities, one be~ir'lg that the next event in thcir Yuc'i~za Mountain region could have a recurrence interval sormewhere around the range of 3110,0001 years. lie e~rnphasized the use of multiple permissive models as providing mlultiple ways to look at the probability data to try to forecasl: what might happen.

MINUTES

'176TH ACNW MEETING FEBRUARY 13-15,12007 Dr. Crovwe then described a new type crf rnodeling ~upprlclach being explored ir~ fliuid an(:::[

contaminant transport models,. This approach is carlled Bayesian Model Averaging (HMA). 'This

~nethodologl,r had previously been presented to the A,CNW and is documented in the 2003 NRC report NURBi:G/CR-6805. This kind of approach mray have applicability to volc~ianism models8.

"The Bayesia,n perspective provides a way to integrate data to both quantify the uncertainty and lo try to assqemble good predictions,. Dr. Crowe hasi shown the Yucca Mountain scenario and

iissociated p~lrobability distributions to other decision iianalysts who work with e

nvironmrerrta/

modeling prcl:~blems. Compared to dealing with rem~ediation and decision optiorrls for Superfund sites, those ianalysts found the roughly order of magnitude uncertainty in volcanlic intersection at "Yucca Mountain to be relatively minor by compariscon.

In closirhg, [)I.. Crowe! commented that il will be diffici.~lt to be able to further redu..uce tk~ie r~ncertainty, :and that limits may have been approacihed for the data sets availahlle for the "r'r..ucca Mountain reqjion. The key thing to do is to quantify the uncertainty using a variety of techniques sing multiple permissive models.

Charles CZor7llnor (Llnrwersity of South FHorrda) gave $31 u overview of me tho do lo!^^^^ un p~rol,atlll~stlr,

~/olcanic hazard assessment and the~r application at 'Yucca Mountain. tiis talk was t~ltietj "Probabrl~stit, Assessments of Volcanic Hazards at Yl~~cca Mountain, Nevada." lie addressed Ihe quegtion "What is Ihe probability oll igneous disri~phron af the proposed royository al Y~~cca Morlntain?" Key factors to estimate are the spatial intensity and recurrence ratsh of volcan~srn.

It is importarit to define the igneous event (dikes, volcan~c vents and related \\,(er~t strt~~ct~lres

,ind sills and related inlrusive structures)

I'rofessor Connor de3sciribed a rnodel approach usirig;~ maps in probability assessmerit scen;iiiv i~os, and devrelopment of a Monte Carla event simul~l.or that considers volcanic even,[ types and geometries, based om analogous evenl:~. The sim~~lator is based on a library of dike, vent, and

$;;ill geornetriass derived from geologic mapping at th~e well-exposed San Rafael \\,uolcani,c field.

"The libra~y ir~cludes 94 dikes, 34 vents, and 3 mapy:>ed sills. Mapping reveals basic features of dike injection associated with igneous events in ba!;arltic; volcanic fields. Dikes nkegment anlcl rotate as thay rise in the shallow crust. Dike trends; in the shallow crust may be oblique tal regional maximum horizontal ~ompressional stress. Vents are the surface enpressium c~f' conduits 'thrc;jugh which magma flows. Worldwide mopping indicates the followi~ig fe;alures 01:

vents that are associated with basaltic volcanic fielcls,: multiple vents are normalily associated

\\#ith individui;al events; these vents are l~sually distrib~~ted along one or more dikes; vents are!

[nost comms:,n at offsets in dikes; not all vents build scoria cones at the surface,; and vents develop corrrplex zones of interaction with adjacent wall rock, often involving amas >'I00 rn in diameter, Siiills occasionally form in basaltic volcanic fields. The frequency of :si~lls in Vie Ylucca Mountain region is not known, but sills are present at ttie Miocene Paiute Ridg'e,, easl: of' Yun::ca Flat on !:he F~Jevada Test Site. New drilling data indicates that magnetic anomal:y A is likely ;3 sill I/:age is Miownej, and other sills may be present. It is uncertain if sills accomi:~anied Quaternary activity in thliir Yucca IWtruntain region).

MINU'TES 176TH ACN'W MEETING FEBRUARY 13-1 5,2007 Professor Cc~nnor presented several exaniples of !vent simulator outpilt. Hcdhen dr.!s(;r~Y~erd techniques ursed to est~mate the spatial ~ntensity of volcanism. These include homogeneous and spat~ally-nonhomogeneous methods (e g., nor!^-l~arametric kernel function!3), Bayeslarj methods, arid deterministic methods (such as a model lhat suggests there IS a structural feature that dramatically lowers probability east of Ihe Solitario Canyon fault) Nan-parametnc models of spatial intensity have the follow~ng ad~arlt~ages:

(1 ) being based or1 Khe distribution of past volcanic; events, (2) accounting for the spatial scale of volcano clustering in the Yucca Mountam ravljion; (3) being consistent with large scrale geophysical structures in the regrorl r;e.g.,

volcanoes i r ~

the AmargosaTrough, consistent with low velocity zones derived from sparse tomographic data; (4) avoiding discont~nuities in spaliial intensity that are geologically unrealis-tic; (5) having a physical basis ""- Gaussian kernel fr~r~ctions reflect the spatial scales of partial melting 111 the mantle irl a manrner consistent w~th heat and mass diffusion Professor Connor dest,ribed how a spatial probabllitl~ model must consider the ~~ncer'taint~y 11r1

[he estimate1 of spatla1 intensity For mon-parametric models (and most other erjt~mafles of spatial ~ntenlsity), a major source of ur~certa~nty 1s raslated to the relatively few events (older volcanoes) Ihat are used to model the probability density function (pdf) of spatial intensity It is possible to cilkstimate the uncertainty spatial rntenslty using bootstrap method:;. Essentially, the pdf derived 'Hrom older volcano locations is sampled (to lind a set of new "hypothetical*'volcaslo locations. Tllese new locations are used to estimate the spatial intensity at a gr~d po~nt Th~s procedure iall repeated and the range of spatial intensity reflects the uncertairlty in the rriodeil due to data (,aleatoric uncertainty), assuming that thc! statistical model is correct. The! fewer events (oldalr volcan~c events) available to create t h ~ l model, the greater the urlcerta~nly Professor CJonnor then discussed the task of estimaling tenrporal recurrence rates. He described apparent ternpara1 clusters near Yucca Mountain (0.08 to 1 Ma; Pliocene,3 6 to 4 ;!

Ma, anti Micucene 9.0 to 11.2 Ma). He presented a serres of probability calculations. Given a temporal ret:urrence rate of A = 2 x 10" eventslyr.

Probab~ility c;~f dike irrlrusion w~thln repclsitory bounda~ry IS: (0 05)(2 x IOU") = 1 x RO 7i"yr Probab~lity c11f vent or vent structure within repository boundary is: (0.01 )(2 x,10 ") = 2. x IC14","yr Probabnlity cl~f sill intr~rsion within repository boundary is (0.002)(2 x lo-") = 4 x I O l ~ l r Uncertainty In temporal recurrence ra'ie was estima~tcd using the likelihood ratlo to bc? 6 x, "II:F"'

eventslyr >,"\\ > 2 x 'IO~bventstyr (95% confidence), llhen:

Probability of d~ke innrusion w~th~n rttptasitory bounclia~ry IS: 1 xlO to 3 x 10 '/yr Probability c11f vent or vent struclure within reposit01 y boundary is: 2 x I(J-'

to h I(( 10 iilli/l Probab~lity cl~f sill intrusion within reposrtory boundary is 4 xlO-lD to 1 x lo-' ly(?;~~

MINUTES 1 76TH ACNIW MEETING FEBRUARY 13-1 5,2007 Uncertainty i'n spatial intensity flor b;intlwidth - 7' k.r111 is at least a factor of five (-,,,,, 95Q/I;:Il c;l::)rafi#,,,

tlence), then:

Probabtlity ulf dike intrusion wlttlin repository boundalry is less than: 1 x 10"6/y~r Probability cllf vent or. vent structure within repository boundary is less than: 3 x IW71yr Probability alf sill intruston within repository boundary is less than 5 x 10 a Iyr -145% confiderice, accounting tor uncertainty in temporal recurrence raje and spatial intensity.

Professor Connor prov~ded additional clomrnents al~oul the above calculations The expected values cbf thf4 probabllity of igneous disruption of the repository reported above ere hrgher than most prevloijs estimates. For example, the original FVVM estimates for volcanir: disruption oit the reposito~y had expectdd values for this probability of 9 x lo-' per year (revi~ied to 1 2 x 1 V8 Syr), this us roughly the same as calculated here for the expected value of probability sf disruption by vents and vent structures (2 x 10'8/y/yr), but significantly less thari lhe expected value of the probability of dike intersection (1 x 1 O""/!,rr). These differences in expected values arise becaurte previous treatments of the geomet1-y c~f igneous events were overly sirnplistlc-In this analysis, igneous events are treated as geologically complex features, corrc;istent with observation$, in basaltic volcanic fields. Uncertainties in temporal recurrence rate (because of few Quaternary events) and spatial intensity (becau~se of few events) result irr t~ncertalnty #rl probability estimates Cumulatively, thls uncertainty IS more than one order of rnagnltude at the 95% confidsnce level. No assumptions are made 111 !his analysis about the intfiraction between Igneous fealures and the repository Rather, this analysis assumes an undisiurbed sett~ny For example, thr'? probability of vents and vent structures forrrling within the repositcrry boundaries rnay be higher than indicated by this arialys~s. The anialysis presented is not complete Fol example, calnsideration of the geophysical setting (isostatic gravity anomalies, seismic:

tomographic; anomalies) is not included. These facliors likely increase the probabllity of events centered SVIIII of the repository rn east~srnn~ost Crater Flat. Based on the everrt ~;imulator results, an lncrsase in probabilities at this location tends to increase probabilities of igneous dlsruptlon of the propolsed repository. The PVHA process will consider a much wider range ot scenarios, such as alternative models of Igneous event recurrence rates and the roles c11f geophysrcal!

linformation Eugene Sm~~th (University of Nevad\\a - Las Vegas, Clark County, Nevada co~itr,+ctor) d~scul;sed khe importarrce of understanding the plocess of magma generation for volcaxiic hazard studies related to Yarcca Mountain Professor Smith comm~ented on the influence of the mantle on magma source zones. He considers ~t very lmportar~t to understand the prociess of \\~olcanrsm before calculating the probab~lity of future events. Tlliere is debate as to the depth of the boundary ba~tween the lithlospheric mantle and the arjthenospheric mantle under Yucca Mountain. Tllie traditional model assumes melting in1 the lithosphere and implnes that volcanrsm 1s wanirrg There is a very limited amount of materiral to melt in this area. If ~CDII assurne the traditiorlal model is correct and volcan~sm is waning, the probability of a future crupt~on IS actually very small. Professor Smith previously prclposed a model of deep melllng iri Ihe asthenosphu?re at depths greater than about 100 kdometers This model has broader perspec-tive, focusin~g on an area ~xtending from Death Valley all the way to Lunar Crater, includ~ng the

MINU'TES 1 76TH ACNIW MEETING FEBRUARY 13-1 5,2007

'Yucca Mourm~1'tain area. The implica'tior~ of this modal is that a new peak of vollcanisrr~ is possible, that volt::aniaim is not dead and in the future there might have an upsurge of \\~foIoanis~-rr.

Professor S~lnith briefly discussed sevoral different rrlodels of volcanism, and then canly)ared the tradltlonr3l model (assumes Iithospheric mantle rrleltlng and implies waning volcan~sm) with a deep melting model that assumes a Lunar Crater-Death Valley belt of volcanism (and rrnplies a new peak ID^ volcanism is possible). He describeid various patterns of petrc~logy and trace1 elemenl chemistry. The dleep rxielting model involvss melting of asthenospheric: mantle lithospheric ~~nantle does not melt. Tha deep melting model is supported by sirn~ilar episodnt, patterns of volcanism and depth of melting calculallicllns Professor Smith showed a figure that displays an alignment of volcanoes of various ages oxtending from Lunar Cratar to Crater Flat and then to Death Valley. He then showed a plot of the number of events versus age, n:omparmg Cirater Flat to Lunar Crater-Reveille. Aflter about four million years, there ns,3 synchronour, pattern between Crater Flat and Lunar Crater. Prior to that, the activities wert.?

disconnecte111-J. Now one of the questions that arises is whether this pattern is c:omrnorn throughout tlhe Great Basin or whether it is focused1 jlust on tlhis belt of volcanisnn. There IS very little corresplondence between southwestern Utah r;lnd the Crater FlaVLunar c'hrter Belt Rut there is good correspondence with the Coso-Lone P~ne volcanic field.

Professor S~~nith theril discussed rneltirrg depth. Mettuny is really deep trj the (>rater FlaVReve~lla#~/Lunar Crater area and becomes shallouver as you go to the west or to tlie easl In general, most of the melting is occurring in the asthenospheric mantle and very little In the lithospheric mantle. The deep melting model must explain several things. Tenrperalures have to be about :200 degrees higher in the mantle in thils particular area, and there rnust be arb explanation For the very narrow belt of volcanism and the episodic pattern with basalt~c.

volcanism occurring rn the same bell lor as long as 7 I million years. It is important tch take a step back and take a look at the history of Nevada for the past 400 to 500 m~ll~c~n years There have been a lot of rrrountain-building episodes in Nelvada over the past 400 rnillllon years The most recent of those are the Sevier Belt just to the etast of the Lunar CraterlCrater Flat Belt and the Central Nevada Thrust Belt which actually goefi right through the area of the Lunar CraterlCratsr Flat Belt. There was ample opportunfty for thickening of the lithosphere? dunrlr~q Paleozctic a1 ~d Mesozoic tecton~c events and thinning of the lithosphere beneath the Sierra Nevada Owsr time this has developed a keel in the mantle lithosphere. The mantle of lithosphere nlnoves arid kiaks up mantle edd~es. Thwe is an edge effect where osthenospherkc material IS moving up along the boundary from high pressure to low pressure:. And if magrrla moves Xrom high pressure to low pressure, we can melt magma adiabatically (with no add~t~onal anput of heall). The eddies in the very s~mplistic view are moving with the plate, so any trme an area of hot ~nantle is intersected, there is the poterrtial of producing volcanic activity Once we reach an artra of colder mantle, we yet a period of quiescence and won't get another peak of volcanic actl~~vity until another area crf hot mantle IS reached. Seismic tomog~raphy suggests the asthenosphuaric mantle is thermally very ~nhomogenous. There are a lot of areas that are hotter than ott~ers. The volume of material produced at any one time depends on the lengihs of the melting so rl is theoretically possible to get another elpisode of high volume niaterial erupted

MINUTES 116TH ACNW MEETING FEBRUARY 13-1 5,2007 within this bci?lt if a hnt spot is inl:erse!cted that has ell l:hree-dimensional geometny that rnaghi be suitable.

Professor Sl~nith presented two conclusions It IS rrnportant to know "why" in o~~rler to determine "when." Anfl probab~litv studies are dependent on Ith~e petrologic model Kevin C,opplirrsmith /DOE - YMPO; contractor, leatlerr of PVHA & PVHA-U) dist,ussed the use of expert elia:itation 111 predicting the probability of v~olcariic events at the proposed Yircca Mounta~n re~pository -- objectives, methodology, impl~cations of the PVHA and PVHA UI The objectives OI his presentation were Lo summarize the1 evolut~on of formal expt3rt elicitat~m

~nethodolognes for hazard analysis at US NRC-regirlgated facilities (lessons learned and solutions to Identified problems); to define the essential steps in an expert elicttat~on, to describe the basic elements of a Probabilistic Volcirrrilic Hazard Analysis (PVtiA); to sumnrarlze the rnethoda~llogy used In PVHA-96; arrd to review thfa methodology being used In the PVHA Update (PVbiA-U), Issues being addressed in PVtIA-U include spatial evaluatron (region of interest and spatial model); source zones (alternative zonations and nature of zone bound aries); spaticrl smoothing (amocrthing operator and distance); and other conceptual nrvodels Dr. Coppersmith descrlibed the historical context ol f~~rrrral expert elicitations, elremerrits, ot the nnethodology, the various steps and cr~ter~a for a furrnal expert elicitation, anti the expert selection crileria for the 1996 e#icitat~ori. He also showed various examples of temporal and spatial prob~rbility models. He then presented the following conclusions: (1) ~nerthodx for conducting formal expart elicitations for probabilistac hazard analyses have evcrlved over the pas4 20+ years; ( 2 ) iuethodology guidance provides for essential steps that !;hould be followed within NRC reguletory envlironment; (3) PVtiA-.96 and PVHA-U take advantage ol the tessons learned; (4),ach expert el~cltation provideti,,an opportunity for refinement.

,Jack Davis trnd Johii Trapp (both with the Office ol PiMSS) gave a talk titled "NRC Staft Perspective on lgneous Activity Issues Overview o~f the Licensing Process, [l~velopment ot NR Review Cap~bilities, and Probability of Igneous Activity " This talk presented the rolos andl responsibilit~~es of the NRC, the staff's expectations lor a DOE license applicatncrn, risk ~nforma-ition, development of NRC staff review capabilities, and also gave the status of Igneous activity issues. DOE'S role IS to characterize the Yucca Mo~ilntain site, develop a basis for meeting performanal! objectives, prepare and defend the lia~ense application, and conslruct and operate the repository, if it is licensed. -The NRC staff hava (levaloped a technical undl~irstand~ng and process to msview a license applicatiorr, have conducted prelicensing interactions on site characterization and early identificat~on of issues, will review a license applicat~on and develop a Safety Evalr~ation Report and also review an Envirorrmental Impact Statement for adoptlor1 lVRC will alsllo oversee and inspect DOE operation:;, if the site is licensed.

The NRC: staff expectations for igneous actlvity in,,a license application were described A transparent and traceable technical basis is needed for inclusion of site charat;teristlcs arrd appropriate Features, events, and processes. DOE: nieeds to provide an assessment of events with at Yeas1 1 chance In 10,000 of lnccurring rn 10,~IDOO years, plus evaluation of uncertarnty,

MINUTES 176~"

ACNW MEETING FEBRUARY 13-1 5,2007 variabiluty, and risk significance anel ccunsideration 11311 alternative conceptual r111ou3els. rhere 1s also an expectation of demonstrable rnodel support. DOE ts not required to "~,redict"' lgnecrus events. Stochastic methads are used to forecast 241 range of outcomes An apy~ropr~ate range of uncertainlies and alternative models must be considered. DOE's performance assessment is to considt?r features, events, and processes thal significantly change the t~nrvng or rnagnttude of dose Th~e NRC staff will revrew DOE'S performarlce assessment, along vwitkr other relevant

~nformation, to determine if there is reasonable expectation that the site can irr~ctet the perfcrr-mance 0bjec:tives.

The NRC presenters also stated that the NRC staff has r~ot developed,A "position" orr igneous activity Both the NHC staff and DOE hold ~iirnllar views or1 the relative risk ranking of igneoLl1s caci\\~vnty.

The volcan~~r;m scenario has a low probab~lity of oclcirrrence but has potentially large conse quences, and has high risk significance w~thin the total system analysis. The estrmated r~sk s~gnificancer of different aspects of the igneous activllty scenario are given in the Risk Insights Baseline Rallport. Through the successful key techn~cal issue process, the NRC staff antla" pates that CIOE will have suffickent informatron in the1 ltcense application to s~~l;)port NRC revrew.

The NRC: stlaff presenters commented that rn their oplrilon the key concept o~f went def~nrl~oll was noti cieal~rly discussed in the draft ACNW white paper on volcanism The NRC staft has concerrls wYth event definition, that there many waysl to define an event such1 as single mappal.,le unit, vent alignment, etc. Such definitiolisll require adjustment in nurnber c ~ f everits, size of events, recurrence rate, and other parametnerrs For example, is the Qusternary activ~ty nn Crater Fh~t one event, a vent alignment about li? Crtn long, or four or more irrdividual events on the orde~ of 1 krrl long?

The NHC; s1,aff considers there rs hrgh risk s~gnificance associated w~th the p~rcrtuability r ~ t igneous act~vity, airborne transpori of radio nuclide^;, and magma-drift interactions. A summary was providad of staff work In each of these areas a~nd the current issue resolutjon status IIOE has completed drilling of 7 new boreholes to ~nvesligate aeromagnetic anomalies in support of an ongoing update of their probabil~st~c volcanic hazard analysis (expert elicitation) DOE IF, also updating several ana~lysis model reports to address the issues of airborne transport and magma-rep~~sitory interadions The NRC staff state that they have a transparent technical approach for use in evalu~lting the potential signific;:wnce of data and model uneertairrt~es, and that they halve the necessary tools and information t113 conduct a licensing revit:~ The NIRC staff states 'that they are ready to review DOE products as Xhey become ava~lat~le.

Day 2 - Disul:ussion of the Consequences of Ignler>us Activity Several briefings that had been scheduled tor Day 1 wore postponed until the rnornlrly cur Day 2 due to an enlrly disrn~saal of NRC personnel in response to inclement wrnter liivtsather These briefings ~neluded a talk by a representative from tI7e US Department of Energy (DOEIVucca Mountain Project Oftice), who provided DOE's viewsl or! the ACNW draft White Paper In relation to the naturr~?

and predrction of ligneous activ~ty.

MINUT'ES 176TH ACNW MEETING FEBRUARY 13-1 5,2007 Eric Srnistarl (DOE) gave a talk titleid "Revlew of DOE'S Positions in the While IJapel Nature and Prediction of Igrkeous Activity." He noted that lthe ACNW report reasonably capllures rx~uch of the DOE I:echnical work and approach. 'The ACNW report is a snapshot i r ~

time usrng available information; it cannot fully capture the technical basis for the License,Applicairon Mr. Sm~stad's presentation gave a hlgh-level sumrrlary of observations regard~r~g the white paper. He rr~oted that more detailed comments and suggestions would be provided later hAr Smistad noted that the ACNW report ~ncludes some speculative comments about probablllstic volcanic hazard analysis-update (PVHA-U) outcorlies (e.g., suggestion of lowering of probabil-nty), the PVbIA-U work 1s underway and no hazard r:alculations have been dona Thls work will not be c:ompllete until after subnlissnon of a license appllcatian. The report citesl some 'areas of disagreementn between DOE and NRC-possibility of rnultiple vents, d~ke lelrgth, and d~ke width Mr. Smustad commented tlhat the ACNW report do+!bI rlcft Include explicil dlsch~:,.ujton oil CIQf's conceptual rnodel ol magma generation. This conc:ey~tual model provides important c:orrtext for understandi~~ng waning volcanism, low eruption volu~rrles, low eruption frequerlcy, volatile-rich magmas, an~d the inappropriateness of proposed liil~ks between Yucca Mountain volcanisrrl and other, more active, basalt fields originating from a rnore active magma source Althc~ugh Plio-Pleistoc,ene basalts are heavily emphasized in Doff and PVHA models, Miocene episodes are still included with low weighting Mr. Sm~stad provided the follow~ng co!rclusions: (11 1 lrhe ACNW report reasonably captures much oif the DOE technical work and approach; (2,) the report is a snapshot in time lrsirrg available information, it cannot fully capture the technical basis for a license,applicatron; (3) this presentatior~~

is a high-level summary of observation:; regarding the ACNW report - more detailed conlments and suggestions w~ll be providad (examples: detectability ol anornal~es, and age interval$'; of basalt episodes - in contrast to ACN'W's report, there was no volcanism between 5 a~nd 7 Ma, and Miocene volcanism ended at approximately 7 Ma, lint 8 Ma as stated A represent~itive for the Electric: Power Research In$\\,titute (EPRI) provided feedback to the Committee regarding the draft White Paper Profslsrior Meghan Morrissey ((;crlorado School of Mines) gave a talk trtled "Preliminary comments on ACNW "Igneous Activity,at Yucca Mountain:

Technical Ehsis for Decisilon Making:'-vent Probab~lity and Nature and Characteristics " Her Calk outlined key points dwumented in the ACNW report and provided additional comments for consideration. With respect to the probability of voWctan~sm at Yucca Mountail), EPRl plaris to review the rwlaport frorn the PVHA-U, to be released in1 2008. Additional comnlerlts provlded for ACNW c~na~ideration include: waning of basaltic volr:anism in the region; dike evolut~on (geometry), and magma genesls in the Yucca MounY.ain region. With respect lo the nature and characteristrics of potential igneous act~vity, EPRl has developed three major r~aports EPRI considers a "reasonably expected" voYcan~c scenaric~l for the Yucca Mountain region to he based on the L.athr~op Wells basalt center EPRI considers this volcano to be the best analog tor future volcariism, involving fissure leruption with firel fountains and aa lava, Sllrr~nnbolian eruptiorbs (cone-building phase and tephra ejection), and additional aa lava flowls

MINUTES 1 7eTH ACNW MEETING FEBRUARY 13-1 5,2007 Professor Wlorrissey d~scussed characteristrcs of nlal~gnla ascent and magma Ijroperlie:;

I:rC)E previously assumed that the magma in the Yucca Mloulitain region would be low vist;osity, slowly c;rystr;allizing, with magma temperatures of 11f50-1200°C. However, Nicholis and Rutherford 12004) showed the magma temperatura lwould actually be 975-1 01 61°C with h~glier viscosity and faster crystallizing magma V~scositiniss~

would now be expected in the range of lo5-1 0' Pa-r; (10"108 poise). With regard to stylev, of volcanism, EPRl provides the following comments for ACNW conls~deration: (1 ) clast comflc~~nent analysis of pyroclastwt: deplos~ts frorn Lathrop Wells and reactioln rims of an~phibole phe~iocrysts provide additional ~niformat~on on.l magma asansnt history at shallow depths; (2) rheology of magma in a dike will {vary iru 7 dimenshons Magma-drift interaction will vary along the length of a dike from a thick lacky magma to a bubbly magma or fragmented magma; 113) if a dike should be coun~ted as a single event, then (a series of conduits (vents) located alonq a fissure should not be (ounted as separate events in PVMA-U calculations Professor Nllorrissey noted a series od volcanoes that represent "uncertain" analogs ilur Yucuca Mountain "1-hese inc;lude Cerrcli Negro, Grants Ridge, L.onguimay, Paricutin, and Tolbachik In EPRl's view1, good analog,s for Yucca Mountain include Basalt ridge, Boulder [lam, Paiute Ridge, and [Red Cones, CA. Irz conclusion, EPRl has provided additional iternrj for A,CWW lo consider bull is in broad agreement with the techniczl analyses and implicaticrns made by ACNW (although ACNW has not yet completed a Aormal conclusions sectiorl ialr the whlte paper). EPlil will prnv~de a set of more detailed ctoniments as requested by tl~t:! ACNMII' On Daqll 2, tW ~e first talk related lo consequences of igneous activity was give11 %ny Brk~~ce Marsh (Johns Wopkins University, ACNW consultant). Me gave a presentation about potentla1 magmalrepr~sitorylcanrster processes in both eruptive and intrusive scenarios and inripl~catlions for risk from1 igneous activity at the proposed Yuccla Mountain repository. Prolessor Marsh described pressure-lernperature phase relations for basalts, including the spec~fic case of Lathrop Wsllls basalt, and how they evolve during ascent through the crust. He desc;r~hed the processes c11f convection and solidification, using pialaff~n as an analog medir~rrn Prc~fessor Nlarsh then lnlescr~belnl the effects of percentage of crystals oiri the lrr~lrlbility arntl viscosity of llnagma He showed how the radial flow distance of lavas at Lattirnp Wells can be used to estimate the effeotive viscosity of the flowa (luring emplacement. 'The result obtained is an effective kinematic viscosity of 109 cmLls. Prelnrninary calculations of magrrla flow in repositc~ry drifts are bang perft~rmed. A key concln~~~iori reached is thal eruptior9.s of the type that ocr:urred at Lathrop Wells involved relatively explosive "wet" magma that produced relatively vi~,cous, immobile lavas. Thns would restrict the extent to which magma c0ult.l penetrate re~ository drifts.

Art Moritanz~ (University of Calitornia - Los Angele~j Iretlred]) discussed pote~nlial therrnal and mecha~~ical magmajcanister 1nterac:tions associated with the intrusion scenario at the proposed Yucca Mourltain Repository. HIS presentation conairjers the potential interaction between the alloys and the conta~nrnent vessels and the volcan~lc fluids, magmas and vapors. Professor Montana strilted that we si~mply cannot afford to densiqn a repository for high-level nuc:lear waste

MINUTES 176TH ACWUW MEETING FEBRUARY 13-1 5,2007 without assi~~ming that an Igneous ever~t will occur ailld that it w~ll impact the c:u~listert; Serious consideratickn must be given to desigrl~ng the drifts so that they can be backiillerd whtch woil~ld provide for rjafety and predictak~~lity, rather than adhering to preconceived cc~ncepts ot accessi-bility.

Professor hlllontana rrliscussed Ihe sust:eptibrl~ty ot ~tl-le conta~nment vessels to 1:orroswtrrn arlcl failure resulting frorwl mag~matic activity He has worked with steels and other alloys ilmndel extreme coviditions and h ~ s firsthand experience wrlh r~on-ferrous alloys similar to that berrrg considered,as a protective erlvelope around the stlsinless steel containers. (:t~nsider~ng the potential chssmical interadion t~etwaert magma and the canisters at elevated temperatures, the 2004 EPRl report used several soulrces of informaltion to assess the extent c~f ciorroslorl oi the alloy-2% shmlves surroundling the stainless steel waste canister when contacled by magma,

~upplement~lng the scarcity of available data with the1 information on corrosion in high-temperature glasses and rnolten salts. Alloy-2!2 is largely a nickel alloy wihh lesser arrrlounts of chrorniurtr and molybdenum and even lesser ye1 amounts of iron and cobalt Because data for alloy-22,are limited, EPRl used alloy-X and lnctlrlel 625, for which more datla were ava~lable.

Alloy-X IS siilnilar to alloy-22 except that the Iron to nickel ratio is higher The chromlrrm content of these thrfre alloys is quite sirnilar arld that is an ~rrllportant feature. EPRl took the data from those three alloys at the top primarily and drew a tiest fit curve and concluded that the corrosion rates at mal,jmatic temperatures range up to about 30 microns per day This clorrosiorl rs similar for all of the chromium-containing alloys, suggestirltgl to the investigators that it's primarily the oxidation of chromium rtself to c::hromium oxide, providing a protective coating Other rneclra-nisms are possible.

Tests had bleen dorve rrn the corroswoll of various stainless steels and high-ten'~perat~.lne allcrys in the presencle of oxygen, sulfur dioxide, carbon, monoxide, methane, chlorine gas, hydrochloric ac~d, arrd others. The reslults also revealed thali the formation of a coating ol Cr-203, chromium oxide, in chromium-bearing alloys provided protection from attack by other corr~ponents However, ail important paint was that at temperatures above 1,000 Celsius, thr? chrcrmrurrk oxide became volrntile. Tt~ws might be worth looking into Perhaps onli? of the studies mosli relevant to Yucca h,Aotrntarn is that of a Dounglk~ an~d HeaYey in 1981, who iu~~vestigated the oxidation sulfidization c~lf unalloyed chromium ancl ~rinalloyed nlckel in basaltic liqulrd at 1,150 Celsius for as long as 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> The combined effects of oxidation and sulfidization reached about 20 microns per day, wilh chromium again performing better than nickel. And lhen more reclently Findlan and Petersorl in 2004 conducted expennnents for EPRl using alloy-22 immersed in molten Hawaiian basalls at 1,200 degrees Celsius for per~ods from one hour to two weeks Maximum penetration of a corrosion front in the longeat experimerrts was about 300 microns, which lwould average abol.lt 20 to 30 microns per day which ns consistent with the previous data. A c:rucible removed from the magma sholwvs the quenched basaltic liqulld and eiliher the chromlunl or the nicked ring ins~de. It looks pretty good after be~ng ali 1,200 def~rees for 1 to 2 weeks, but closer examir~ation showed that it was corroded arid pitted Theri EPRl irk 2004 presented the results of modeling, and concludec! that arl rmportant parameter nu; the temperature difference between solidus and liquidus, that isl, the temperature

MINUTES 176TH ACMW MEETING FEBRUARY 13-15,2007 interval over which the canisters would be at contalcll with molten material. E FYR co!l~llldetJ that most ol the corrosion would occur In the temperatl,rre range of 1,150 Celsius ta 800 Celsrtts.

EPRl's concl:lusion from these studies was that no w(aste package would fail dnlring an igneous event at Yu~~sca Mountain.

Assuming that basaltic magma penetrates the dr~fls at a liquidus temperatur113 ol 1,11'31.1 Celsius"--it u:ould be less, it could be more-the DOE report of November 2004 concludes---

and here I'ni goirlg to quote, "'Even if magma were to penetrate a waste package, the magma outside of the waste package is expected to stagnate once the drift is filled on the order ol 1,000 secorrds, approximately 17 minutes, so that there are not likely to be clr~~ving forces [hat would Flow iin through a waste package. Magma is, llrkely to fill the drifts before the waste packages heat up to a polnt of Failure " Then they cionclude that "In view of these results, it is safe to cono:;lude that in the absence c;lf major cracking of waste packages, a silgnifican! arnount of magma will not flow into or through waste packages and that the waste forms will reinam in place." Whilile that rrray be so, flow mlght continue through a dike up to the surtace, resulting in a more prolonged flow of magma through at least lonne or more of the canisters Professor Montana remains unconvinced that there are adequ/ate experimental studies to sup~mrt the clarms that lialloy-22 shells will be inert to failure whswi exposed to magma and attendant vapors.

Possibly theptre is no alloy that would provide the desured assurances.

Professor kllontana then discussed the effects of ciDiroslon on the tangential trmsile strength in the containment vessels and the surrounding shield He first assumed that rnagma contacted a canister or canisters and destroyed the outer 25 pcsrcent of the alloy-22 shield, a value that's corisistent with the maximum value in the EPRl mcrdel, This is the outer 5 millimeters of the 20-millimeter-thick outer shell of alloy-22. Professor Montana showed a slide! w~th a cross.

section of a waste package, illustrating the internal tensile tangential stress (ot:). The skln along the long axi~s is the weakest part in any cylinder. The inside surface being pi~lltd apart by tension is where things always fail For an uncorrc~ded alloy shell, 20-millimeter wall th~ckness, the tangentlal stress will amount to 40 times the internal pressure. If the outer 5 mill~meters 1s corroded, the outer 25 percent of that alloy shell, thsn the tangential stress it; 53 times the

~nternal pretrsure, an increase of about 30 percent If we lose 75 percent of [hat 20-millimetebir-thick shell with leaving a thickness of 8 millimeters, then the tangential stress becomes l@iO times the internal pressure. For the 316 stainless steel vessel wrth a wall thickness ol 50.8 millimeters, the tangential stress is only 15 times the internal pressure Professor Mlontana described additional examples of waste package thermal rersponse lo magma Prcrfessor Nllontana presented several lconclusions The repository should either be bac;ikf~lled or give seri~us consideration to abandoning the Yircca Mountain site. Also, lie sees mcrthing to be gained by speculating about the probability of an igneous event at Yucca Mountain We should accept that it will happen and enter the repository accordingly assuming the \\ivors'l case scenario for temperature, corrosiveness, duration, and momentum of the magma.

MINUTES 176TH ACWlW MEETING FEBRUARY 13-1 5,2007 Timothy M~Cartin (NRC staff) briefed the Comm~ttee about NRC's Regulato~y Pers~ut?ctrvt:

on the Use of Alternative Conceptual Models. Under I D CFR Part 63.114, there are regulatory requiremenllts to consider alternalive models consirstent with available data and to account tor uncertainties (e.g., rrumber of waste packages incliudecl in an extrusive event). NRCZ's performanole assessment (TPA) considers alternative models as parameters (rtxarnples damage to waste packages; secondary break-outs; variation in probab~lity) and uncertainties (examples: variation in conduit diameter and mass loading). Computational demands are minimized b~y linear effects. An~alyses of consequemces of an extrusive igneous event,are primarily affected by: number of waste packages; damage to waste package; entrainmentl of fuel in magrna; and mass loading. Mr' McCartin corhcluded that quantitative analysis of the significance of alternative views will assist dialogue ~ m o n g groups and will support revlew of a potential license application Ned Colernsi~n (ACNW Senior Staff Sc~entrst) br~eterd the Committee about the Iloodiny history and geomor'phology of Fortymile Wash near Yucca Mountain. Flooding woulcl provide one of the key pror:esses for eroding and lransporting any 11:ontaminated volcanic ash that nnay be deposited by extrusive volcan~sm through a reposi'iory at Yucca Mountain. hilr. Coleman described hlow Fortymile Wash is important to volcanic extrusion scenarios, sl~mmarized key processes q~nd the flooding history, reviewed the s~~gnificance of large floods to dose scenarios, and provided comments on the potent~al integrity crf spent UO, fuel in a conduit Mr Colema~~n emphasized there is no evidence that (3 vent or dike has penetrated thri? repos~tory footprint in the last 13 Myr. One 10-1 2 Myr old d~ke came close, on the northwest flank of Yucca Mountain, but is not known to have entered the footprint. Also, ihe volume 01 regional basaltic vol(:anism has greatly diminished since that time. If a volcanic vent were to irrtersect a waste tunna~l, expelled materials could contain contamination from spent fuel. These materials would be dealposited on surrounding hillslopes and Flats nn the adjacent drainage baslns Subsequenl erosion and fluvial transport in Fortymill3 Wash would carry some contarr~i~iated ash toward lthe RMEl (reasonably maximally exposed individual). Mr. Coleman described the general characteristlcs of Fortymile Wash in relation to a satellite image of the! region? The NRC staff alssume irk their fluvial redrstribution model that all transported conts~ninants would be deposited om the distributary fan that begins just north of the intersection with highway 95 and extends sou~thward. The Fortymile Wash channels u:ontinue south across the Amargosa Desert where they ~ntersect the Amargosa River.

Mr. Colemalrl showetl the lnferred fallout distribut~on of Lathfop Wells volcan~c ash, c~verlalr~~

on a digital elevation model, to show the k~nd of areal pattern associated with a past errlptnon In the Yucca Mounrtain regron. In the unlikely event a future eruption were to occur through a repository at Yucca Mountain, any contaminated ash that would fall outside the Fortyrn~le Wash drainage, srlch as in Crater Flat, could contribute little or no dose to the RME.1 Also, any contaminanlts that would becorrre entrained in scoria cones or lava flows wo~rld not contribute to dose because these features resist erosion for hurrdreds of thousands of years. As Professor Sparks pointed out from the Icelandic erupt~on, you c:an have this combination^ of fairly qules-cent lava flu~~ws along with the explosive eruption ph;.rse. It makes sense therefore tcr consider a

MINUTES 176TH ACNW MEETING FEBRUARY 13-1 5,2007 fraction of any extruded waste will become entramell in lava flows. It would bt? a sqn~f~canl; amounl. The NRC model assumes that all extrudrsd contaminants come out as tepkrra, nol as lava. Mr. C~oleman also showed a slide illustrating that the peak risk from igneous activity would occur irl tha first 1500 years. After that time the shorter lived radionuclides, su.~ch as Arni-241 (half-life = 432 yrs), would have decayed significarrtlly Mr Coleman showed photographs of Forlym~le W:ixYh and tts banks to give ~)erspect~vtb to its size. He then showed a plot of elevatrons along th~e floor of the wash and al:j(:~ along the western bank of the channel The figure shows how to the north the channel 1s incisled 20 rn, but grades knto the alluvial fan further to the south The energy slope of the channel1 floor 11;;

0.01 1, which is quite significant. Th~s is not a lazy eastern stream - this slope is capable ot produc~ng quite powerful floods. Mr Coleman presented a table of flood data trom tlhe relatively short period of record. In March 1995 and February 1998, Fortym~Ye Wash and tkie Amargosa Piiver flowed simuttaneousYy through thesin primary channels to Death Valley These were the fivit documented cases of thls conditions The extreme 1969 floodmy must also have reached tha~ Amargosa River but this was not docunrented. These largest floods dorrii~iate sediment trvansport processes In Fortymile Wash The smallest sediments (*re2 microns l r i diameter) hlave the greatest potential to remain susr~ended and travel the greatest d~stances in big floods, abspecially those less than "0 microns that are the primary concern tor inkralatiori doses.

To show that long-d~stance travel of floodwaters docs ~ndeed happen 111 the I'eglon, IWr Coleman sh~owed photos from the wet spring of 2005 when a large lake formed in Death Valley in response to regional precipitation and surface wa#er Flows, including flow in the Arnargosa River which is one of the rnaln channels that lead inlo the eastern end of Dealh Valley.

assess men!^ for Yucca Mountain that neglect long-distance transport of silt and clay-silzecll particles by large floods will overpredict the mass of small-diameter contamirialed ash Ihal would be da~posited near the RMEI Mr Colema~n then noted that insights about the tran1;port of srnall sediments led to 21 reexami-nation of the potential tntegrity of U02 fuel in a volc:anic conduit. He showed a slide that illustrated thte fuel particle sizes assumed in the usey's guides for NRC's verr;ir:)n 3.0 and 4. 0 codes. NRC currently uses a fuel particle size distribut~on of 1 to 100 microrls (:0.0001 to 0 01 cm), very dllferent from a TPA 3.0 distribution of 100 to 10,000 microns. The NRC staff cite NUREG--1 320 as a trasis for usrng the smaller size distribution in 4.0. However, crushing experirnentqi on irradiated fuel, as documented in that NUREG, produced only a small fractton of fine-grained material. Only a few percent of the material was reduced to :I particle diameter el000 micra~ns. Available information suggests that the ceramic pellets that comprise spernt fuel would rv~tain much of the~r integrity in a volcanmc conduit, given the short travel time antl distance thv~ough a condu~t and a melting point for the pellets (i.e., >2800°C) that greatly exceeds misligma temperatures of -1200°C Magnli~ quenching on pellets could prolvlde a protect~ve la~yer, and xenoliths prov~de natural analogs of large objects that sunlive travel through conduits. A more realistic size distribution for spent fuel would reduce calc~~lated doses to ihe RMEli This can easlly be eval~~ated using performance assessment

MINUTES 176TH ACNW MEETING FEBRUARIY 13-1 5, 2007 Sara Rathb~~lrn (Colorado State University) briefed the Committee about prol;exses 1,t Impor tance it1 flubrial and eolian transport of sediments Dr. Hathburn's talk was tilled "Fluv~al Processes In Dryland Rivers." Arid-region rivers are unique because they tend to be ephem-eral, flood-dlominated, discontinuous rn time and space, and illustrate the importance of riparian vegetation and subsurface and upstream hydrology One thing arid regions have in common is that evapo-lranspiration exceeds the precipitation. Complex response describes how a channel can actually undergo two different states, erosion arid deposition, as a resull 0 1 the same triggering event.

Dr Rathburn then described aspects ~:)f the fluvial system, trom the dra~nag~l I:)as~n to {he zone of Ilransfer, (and therr to the depositional area. In ar~tl drainage basins there are locally high rates of overland flow runoff, hillslope erosion by wash processes, or runoff Infiltrates before reaching thris channels There tend to be high sediment yields in arid fluvial sy~tems. L.ittle subsurtace flow is available for the rernoval of solwtc~s. Soils tend to be thin ancl shallow, develop slolknrly, and tend to form calcretes. Mechan~cal weathering is dominalit and clay production Low. Channels tend to be wide and shallow with low sinuosity, low bank stabiirty, are frequently braided, and may terminate in a fan in the? manner of Fortymile Wash. Arld reglon streamflow ltends to be flood-driven transient flow llhat produces "flashy" hydroyraphs (i e. high intensity florklvs of short duration). As a result the flows are hard to measure. -l'nransm?issloir~

(seepage) losses through the channel bed tend to be h~gh.

The role of lloods is supreme Floods in arid region1; have tlie potential to mlolve large yuantl-ties of sediment, car) dramatically alter channel mor~~hology, and disrupt in-channel veyetarton Of the 12 la~rgest floods ever measured in the US, all1 occurred in semi-arid to arrd regions, with 10 occurringj in regions with less than 16 in (400 mrrll) of rainfall. Floods carry high suspended sediment concentrations with a greater size range than in other rivers. The nadimer~t tends to move in step-wise sediment "waves." Bedload trarrslport efficiency is high. Erosion and depositton alre discontinwous. Dr. Rathburn showed a curve developed by Liangbe~n and Schumm which shows that the highest sediment y~ellds are produced at a cornhination r,f effective pr~ecipitation of around 300 rxrillimeters per year (about 12 inches per year). Wrr areas with more precipitation, there's greater vegetation to stabilize the slopes. Where there" less precipitatior~~

there is less vegetation, but there's ncrt as much overland flow to carry sediments tnto the cha~nnels.

Dr. Rathbur~n also ccrmmented on eolian transport, r ~ ~ o t ~ r ~ g that sand-sized mater~al and smaller is transportrrd. Eolian processes can create desert pavements. In the Lahowilan basin ot Nevada, soil-forming intervals were caused by eolian sediment pulses. In closing, Dr Rathburn mentioned s;ome of the challenges In analyzing arid region fluvial systems. It IFI important to understand the connectivity between these systems from the hill slopes to the channels, the tributaries down to the trunk streams. Another challenge is understanding dry land rlver behavior over long time scales

MINUTES 1 7 6 ~ ~

ACNW MEETING FEBRUARY 13-1 5,2007 Brittain tiill (NRC staff) gave a talk titled "NRC Perspective on the Risk Sign1fic;ance crli Potential Conseqilen~ces from Igneous Activity." He noted that NRC has conducted a range cjf independ-en1 investig~ations to develop review capabilities. NHC has not developed a "pcrsitionl" crn igneous acillivity. Independent information sometirne~s cluestioned DOE models in risk 3)lgnrficant areas. DOE has often modified mod~tls or approaches In response to staff c~uastions Staff w~ll co~~nsider a full range of intorrnation during review of a license applic:at~on. The rmew will focus or) the risk significant aspects of the DOE safety analysis report Dr. Hill disc~ussed the potential for rnagma to flow ~nlo drifts 'This has been irat~ed as nxauderate risk with respect to waste isolation. lrrformation frcrrr~ numerical and experimental models shows that ~f magma intersects drifts, it will depressulrize, flow rapidly, and fill intersected drifts with molten magma approximately 1-5 minutes aftlsr intersection. Dr. Hill stated thal the draft wh~te paper does not cite or discuss important NRC information on magma-drift interactions, including aspects of degassed magma flow, 2-phase flow in dikes, and magma ascent Ur Hill then discus~sed possible waste package response to magma, which has been rated as h~gh risk with respecll to waste isolation. Will a package fall if exposed to magma? Awa~lable information shows combined thermal and mechanical effects frc~m sustained (days) magrriatic eKposure exceed desn~gn capacity of waste packages Alterrrative information does not Ilrlcrease dose significantly Dr. Hill stated that the draft white papar does not cite or discuss impoldant NRC information on waste package response to magma ~:onditions, including materials pn-opertl~ts and couplecl igneous processes.

Dr. H~ll

~ I S C G J S S ~ ~

the liiurrnber of waste packages th,rt c:ould become er~trainc.!tl un an er~uptuon, which has been rated as high rrsk with respect to waste isolation. He stated that there 1s information from analog volcanoes that shows conduits widen progressively during ~?rupt~ons and would intersect hot, breached waste packages. Effective conduit diametefrs appear Lo be 5-50 m [16-164 ft]. The draft ACNW white paper cloes not cite or discuss important NRC, information on conduit development Another topic rated as high risk is whether secondar)~

breakouts af magma could release more waste than a single conduit? The NRC stafff ~:ons~der that secondliary breakouts may occur because of repressurization effects during1 eruptron, not shock effedts from iraitial flow. Dr. Hill considers thal the draft white paper doe!a, not 11;lte or discuss important NRC information on the formation of secondary breakouts Airborne transport processes tcr the RMEI locat~orr has bee11 rated moderate ~~lith ret,pect #OI risk. Dr. Hillll stated that there 1s available ~nformat~oli from models and analog depoa~tls, and good suppart for model performance. He considers that the white paper does not clte or discuss important NRC information orr the airborne! transport of radionuclide:;. The ~;oncentra-tiorr of resuripended particles glves inhalation dosal lo RMEI. This topic is raled high with respect to risk by the NRC staff. Measured airborrae particle concentrations are independent of particle sizas in the deposit. Dr. HIEI considers thatl the draft white paper does rrot crte crr dlscuss important NRC information or1 the tephra and waste particle-size distr/hutions The movement of tephra down Fortymile Wash after a potential eruption has been rated moderate with respect to risk. Analog information has been,~t.)stracted for a site-specific: model using a sediment m,ass-balance approach to capture average long-term redistr~butioni Frrocerises usging

MINUTES 176TH ACWllW MEETING FEBRUARY 13-15,2007 site-speclfic information. Dr Hill corislders that tho draft whnte paper does no1 crte or ~dnscuss important NRC information on the long-term redistrilrution of potential tephra tjeposilis, Dr. Hill presented the tollow~ng conc~usions. Suff~c;~fent

~nformation currently la,availublei tc,~

support staff review of the potential DOE license application for igneous activiky consequences.

The ACNW draft white paper does not address relevant information developed by NRC in each area discussed. The ACNW draft white paper does not include consideration of risk insights and model riensitivities. ACNW's draft white paper ajoes no1 address limitatiorls in alternallve coriceptual ~models.

Dr Mick Aplied (Mor-kitor Scientnfic, representing EFTtII) gave a talk titled "Prelirm~nary C;omrr~ents on ACNW "ligneous Activity at Yucca Mountain: Telchnical Basis for Decision Making" Conse-quence Ana~lysis." Me outlined the performance assessment approach for an Igneous event scenario at Yucca Mountain. It is a risk-informed approach based on a systttrn analysis.

Dr. Apted's talk outlined key points documented in the ACNW report and pravided addrtioriaf comments lor ACNW's consideration One such comment was that extendirlg the areal repository footprint rnay not affect the probability of dike intrusion, if the structure or topography control dike location Another point to consider is Nhe possible mitigation ot igneous c;onss quences by natural backfilling, as has been suggestled by the CNWRA In add~tion, tharrnch-mechaniical simulations and corrosion tests with Allay-22 and 1200°C basalt~c rnagnla suggest the waste puackage is robust. And will overpressurization and buckling of waste packages occur in waste packages exposed to magma? Another ciomment for ACNW considoration are there credible me~chanisms for waste mobilization into erupting magma from waste lpackages that are no1 entrainad in a cc~nduit?

Dr. Apted sllmmarized the EPRl V I ~ W S regarding tlicl white paper and volcan~srri. EPRH brcvadly coricurs with ACNW's sequential, structured approalch regarding igneous acilivity at "Y'ucca Mountarn, and placing "reasonable assurance' in corktext with 'conservative' iinelyses R~sk informed parformance assessment is essential to. (1) Identify processes, assumptiorrs, arid uncerta~ntievs that are important to safety; (2) set Pelformance Confirmation prioritie?,; (3) examine design options; and (4) determine sufficiency of data. Lathrop Wells is a rfmsona~bly representative analog for future volcanism. If further study is warranted regarding rc:gulatory compliance with EPA's proposed probability-weighted, mean annual peak dose-rate crnternon, greater asswance of safety is rnore likely to be gained by examining event 'c:or~sequences' rather than Iby further refinement of event 'probability' (after completion of P1JHA-U report).

Mr Eric: Smlstad (DOE) presented views on the AI>FIJW draft White Paper in rr3latiorr lo the:

consequences of igrreous activ~ty, The ACNW report does not include enough quantitative discuss~on or detailed comparison to field data to supptrrt conclusions of conservatiarn in representatbon of magma--drift tnteractions and magma flow in drifts. The ACNW report also does not rnc:lude results of detailed DOE analysis of topography and thermal $tress perturbation (during ther~mal period) with respect ttn the impact ern dike propagation.

MINUTES 176TH ACNN MEETING FEBRUARY 13-1 5, 2007 Mr. Smlstad noted that DOE will provide uptfates for the Ilcerise application r~3gardinlg '~r3r1011.1~

parameters based orr analog work. These include d11ke length and width, the number ol dikes in an event, the number of potential eruptive conduits in an event, conduit diameter at reposillory depth, and Fractions of eruptive produds in lava, ccrme, and tephra. A new process-based model is beiung developed for post-eruptive tephra redistribution that accounts for hill slope erosion, fluvial transport, sediment mix~ng, and radlonuclide diffusion into soils at the sille ol final depositlion.

Also for an update irk the license appli~ation, more 1dt:tailed analyses of magriiia"-repc~s~lory cnteractlons are being prepared to examine comprassible fluid and interactior~ with pre-existing structure and topography, potential pressure and flow transients during the igneous event, multiphase interaction between rising magma and drifts, and detailed analysis rrf coupled magma flowlheat transferlsolidificatior~ in repository openings. Mr. Smistad then presented a series of cor'lclusions. The ACNW report reasonably captures much of the DCIE tecklnical work and approa4::h. The ACNW report is a snapshot in time using available information, it cannot fully captura the technical basis for a l~cense applicallion. More detailed comrnants and suggestions will be provided later to ACNW A wrap-up round table disr;ussion was held at the trnd of the day address any Vcrpics that rrlay not have bewsn adequately covered elsewhere in the meeting. Dr. Hinze also ir~vited Working Group partiq:ipants to provide additional written conqrnents for consideration thy the C~omrnittee within two wleeks of the meeting, by March '1, 2007. Along with the proceedirlgs of ttre working group rneetihng, these written comments would be used to further enhance and finalize the White Papal. The working group briefing materials;, discussions, transcripts, artd any follow-up written comments will assist ACNW In preparing a firla! version of the White Paper that will provide an analysis of the current state of knowledgfr of igneous activity which the Cc,mmnssion can use as a) technical basis for decisionmaking.

ill.

SEMIIIANNUAL BRIEFING BY THE OFFICE OF FEDERAL AND STATE MATERIALS AND IENVIRONMENTAL MANAGEMENT PIROGRAMS (OPEN)

(:Dr,. Ant:onio Dias was the Designated Federal Officiziirl for this part of thr: meeting.]

Charles MilYa:r, the Offtce D~reclor introduced the olganization chart of FSME arrd briefljil discussed the roles and responsibiltties of each of the technical divisions in the officer George Pangburn, the Deputy Office Director, briefly discumed the budget of the Offntas and the fad that FSME budgets resources for the NRC Regions, where most of the licensing act~vithes for FSME take /place. Dr. Miller stressed the previous good relationship between the Ccrmrnittee and programs in FSME that used to be in the Officr~ of Nuclear Material Safety and Safeguards and his hop!? that this good relationship would conlinue Dr. Ryan acknowledged the number and role of Agreement States and the fact that mol;t licenses for radioactive material are lssued by Agreeme~nt State programs, and these state programs are overseen by programs wrth~ng FSME.

MINUTES 176TH ACNW MEETING FEBRUARY 13-15, 2007 Larry Camprer, the Dlrector of the D~visron ot Waste Fldanagement and Envirouirr~ental F'rograms (DWMEP) discussed the expansion of responsibilitie~; in DWMEP resulting in a comprehens~ve decommissis,ning program with~n the division. These expanded responsibilitie*; include overseeing the decommissioning of uranium mining siites, which came from an division that used to he irk NMSS, and of reactors, which came from the Office of Nuclear Reactor Regula-tion It also rlncludes resource needs from the growtt~~

ot the uranium mining industry, wh~ch w~ll he regulated in DWMEP and the probable increase in1 the need to prepare envlronmantal reviews to st~ppot-t as many as 12 licenses for new uranium recovery facilities (9 in-s11tu leach and 3 surfaae mining operations). He summarized the previous year's ~nteraclicms with the Committee, including the completion of the consolicjated decommission~ng guidance (NWREG-1757). He sllpeculated that challenges might arise in providing "consistency" arnong different regulatory agencies for cleanup objectives, sometimas called "finality," and that some surprises rnight come up in the low-level waste regulatory arema. He mentioned that inte:ractions w~th the Committee will be needed on the prevention of legacy sites rulemaking, an assessmerit of dose modeling his division wr ll be conducting, the analysms of disposal of depleted ~lraknium, rev~silon of uranium recovery gurdance documents, and the arinual review of LLW storage rules and guidance Ir'i response to questions from Dr. Weinsr, Mr. Camper stated thal DWMEP has requested afssistance from the OfFice taf General Counsel on whether the divis~on carr do a Generic Environmental Impact Statement on In-Sittr Leach Mining. Dr Ryan made a few suggestrons on some technical issues to explore in the DWMEP dose modeling assessment lihai Dr. AbuvuEid will he conducting

!Scott Moore,, the Deputy Division Director of' the Divilsion of Materials Safety iw~d Stat,~r Agreements (DMSSA) explained that 1:his division is iiia combination of some programs that used 1:o be in the 13ivision of Industrial and Nuclear Medic::sl Safety (INMS) and the Clffice of State and Tribal Progriams (OSTP). He described the key ongoing programs in the division whioh are overseeing medical, academic, and commercial useel; of radioactive materials,,and irriplement-ing policies r:rn radiation protection and security witk,ir'i those licensees. 'The division is also responsible for assessing the performance of the regions and the agreement states 1:hrough the IMPEP. Mr. Moore stated that there have not been any recent Committee interactions on any of the progralms in the division. He identified the Orphan Radioactive Material t)ispositiori Program and the DOE OffSite Source Recovery Pro!jram as two activities that may be of interest to th'e Committee. Dr. Ryan pointed out that many of the safety activitiles of,the division are already reviewed by the Commission's Advisory Committee on the Medical Usesl of' Isotopes(ACMUI), arid that the ACNW would not dr,rr:~licate any of that ACMUl's advi:i;or?j rules or responsib'ilities.

Uertlnis Rathbun, the D~rector of the Division of Intergovernmental Liaison and F.lulenlak~ng (DILR) explained that this division includes the remaining programs that used llo be In INMS and OS'TP, inclunding rulemaking responsibilities and liaison roles with states, tribes, and lother governmentual regulatory agencies. Ha explained that his division takes the technical bases for rulemakings developed in the other divisions in the Clffice and carries out the rulemaking process, and responds for petit~ons for rulemaking. Recent rulemakings that his div~sron has responsibility for inclr~de the source tracking system and pre-licensing guidance for raiater~aiis

MINUTES 176TH ACNW MEETING FEBRUARY 13-1 5,2007 licensees This divis~on will ~nteract with the Cornmilttee or1 the NARM Filulemalk~~ng

~f necessary, the preventiclrn of legacy sites rulemaklng and the islsuarice of HLW final rules t:based or1 the revised EPA standard in the near future, and other future rulemakings as they are implemerited.

In response to questions, it was explained that review of EPA rulemaking on low-acti~lility radioactive waste would probably be handled in DVIJhlER.

The Committee agreed not to write a letter to the Cornmission at the cor~clusion of t h ~ ~

rneuting.

However, tht? Committee staff will meet with FSME upper management to solic;ilt their 1r3put can the draft AClYW Acticnn Plan which is being prepared for transmittal to the Cornmiss~c~n IV.

BRIEFING ON INTERNATIONAL CONFERENCES ON DECOMMlSSlOMlNG AND LOW-LEVEL WASTE SUBJECT (OPEN)

[Mr. Der'ek. Wilidmayer was the Designated Federal 0,IRicial fur this part of the m1e3eting1,:l Andrew Pe~sinko ot FSME discussed his partic~pation, and also 01 Dr. Ckrarles Miller of FSME, at the International Conference on Lessons Learned from the Decomn~~ssioning of Nuclear 8':acilities and the Safe Termination of Nuclear Activities held nrl Decernber 2006 in Athens, Greece. He described the two papers contributed by the NRC at the cionference, which tiiscussed the decommissioni~ng lessons learned activ~lties of Ihe NRC and the graded approach to decommissioln~ng of material's lwcensee siten;. He tlescribed tile seven sessions into which the conference was organized and described the contributions of the NRC representatives at; well as other United States participants.

He summarized the e~ght most important lessons learned in decommissioning based on the report of the President of the conference provided to participants. They were om (1) clecomrr~issloning strategies, (2) knowledge management, (3) regulatory lessons, (4) important 0 1 decommissioning funding, (5) transition from operations to crlecorrimissron-ing, (6) clearance of materials from decommissbning, (7) technology used for decom-missioning, and (8) decommissioning of smaller facilities. The coriference proceedrngs will be published in about 2 months, at which tirne DWMEP will mine the snforrnation to add detailed reports of some of the lessons learned to its webpage. Mr. Persinko stated the Committee can gel a copy of the pralceedings of the meeting at that time Mr. Persinko noted also that contributed paperfs (were already bound into a volume that was ava~lable now In response to questions, Fdr. Persinko said that the tie between c~ecomrniss~oning lessons learned and designirllgl new facilities was discr.lssed, but there weren't any specific presentations on the subjecll. Also in response to a question, Mr Persinko said that no specific lessons learned were identified for research ancl tesl reactor%

(3x1s MlcKanney 01 FSME descr~betl the major princziples of the lnlternaticvnal Atomla Energy Agelncy's (IAEA) Draft Safety Guide DS-:390, Classificatior7 of Rndioackttve Waste, which he reviewed in the Fall of 2006. He explained that DS-390 is aal update to IAEA safety guide I 1 ? -G.-'1.1, whlch contains,,an older classification scheme, ancl

MINUTES 176TH ACNtW MEETING FEBRUARY 13-15,2007 which predates several recent IAEA safety guides on other radioactive waste marrage-ment subjects. He explained that the new sctlelme bases the classification of waste on disposal telchnology as opposed to waste origins, and is more consistonl with the positions o~f the Joint Convention The classifi~::r~tion scheme contains six broad categories of radioactive waste Mr. McKenney stated that he was satisfied w~th the resolution of the majority of the staffs comments that were submitted 011 DS-390 that were workelrd on at the working group meeting ir11 V~enna in Fall 2006, ponnting out that some c:omrnents he represented at the meeting were from the DOE. [)IT Ryan ponnted out that the! additional dimensions of quantity crf radioactivity and the abnlity 01 a radionuclide to move in the environment appear to have been minimized in the classifi-cation schecme developed. Mr. McKenney explained that DS-390 tries tcr explain these dimensionalities of radioactive waste disposal, t~ut probably could do a better job. Mr.

McKenney and Giorgio Gnugnoli of FSME explained the options that CIS-390 may undergo orr its way to being published, and that one of the options available to lAEA would lnclu~de returning the draft to member stales for an additional r011md of comments, Vice-chaim~ian Croff told the staff the Cornmitteel would like to be involved in ihe revlew if the draft 111s pl~blished again for comment.

The Comrn~ittee agreed not to write a letter to the cC;ommission on the results ot the internationral conferences at the conclusion of th~e meeting. However, if the IAEA draft safety guide DS-390 is ~ssued again for commer~it hy member states, the Committee would like !lo be included in the revrew of the draft V.

POSSIBLE USE OF MODERATOR EXCLUSION FOR TRANSPORT,AI"ION PACKAGES (OPEN)

[Dr. Anl:ania Dias was 1:he D'esignated Federal Offin::iii%l.for this part of the mef:t~rrg.]

Nancy 43sgc,od, Senilor Project Manager, rn the Office of Nuclear Mater~als Safety arnd Sate guards (NMSS), Divlsion of Spent Fual Storage and Transportation (SFST), br~efed the Committee on a Commission paper addressing sevrtral options for moderator excluaior~ and possible regulatory paths forward for addressing tt~is issue. In particular, it was expla~ned that staff is seeking a d v ~ t ~

from the Committee on whether (or not) SFST should trreg~n 1he background preparation for a rulemak~ng on moderator exclusion. Ms. Osguatct presentation highlighted ~Ihe following key points I I the regulatcrrrl/ framework for transportation of Fisslle material, 2) regulations for fissile material packages, 3) current staff practice wnth respect to moderator elhxclusion, 4) points to consider if practice1 is changed, and 5) regulatory c'rptiorrs Currently, alll fissile packages (except UF,) l~censed by the hlRC are required Ilr~ be analyzed assuming moderation with water to the most react~vo extent. Moderatar Exdirsion is; esserrtially a critical~ty riunalysis assuming rro water or other mc:)derator inside a trarisporti package contain-ment svstern. Use crf moderator exclusion would bra a significant departure trcm NRC'c; current

MINUTES 176TH ACNW MEETING FEBRUARY 13-1 5,2007 practicer ancil has sigliiificarit satety, sewrlty, and polilcy ~mplications. Ttre cur r13nt staff thl~ik~ng rs that an a~:~propriate way to address the Issue of rnioderator exclusion IS throt,~qh tht?

rulemaking process Therefore, the staff seeking I ;almmission guidance regarding nnodera tor exclusiorr Design~ng a rissile package so 11t is u:r~t~cally safe W I I ~ ~ I water inside is a fundarnentar rieq~~~nenxlent lthalt imparts a margln of safety and defense-ln-depth agalnst accident ciriticality Astrunnin~g

\\water in the containment system provldes a defense-in-depth, considering such things a:?

uncerta~ntiers in the transportat~on environment, hullman factors, loading and trriload~rr~g, arl{,j malevolent racts.

NRC approves of ccxti'fies designs for "'Type 6 and,fia;sile rnaterial packages 1.1si111g pe!rf'u~rra..~,ance standards i r ~ ~

Part 71, Ms. Osgood reviewed and explained the following performance regula-tiorrs relating to criticality safety to the Committee: Paragraph 71.55 (b:) of 10(3FR states, in1 part:

"...siir~gle package must be sut:llc;ritical with vvarten inside and fuel in mc:~,slt reacl:ive credible

~l::onfiiguration."

F1ara$jraph 71.55 (c) of 10CFW ~jtates:

'The Commissron [nay approve exceptions to the requirements of para~lraph (bl crl this section if the package incorporates special design features that ensure that 110 single packaging error would permit leakage, and if appropriate measures are take11 before eacb~ shipment to ensure that the containmcrr~t system does not leak.'

In addit~onallly, portions of paragraph 7'1 55 Id) and (le) which apply to "Normal Cond~tlons I:,!

Itransporli" and 'Hypothetical accident conditions wore also discussed as it related to moderator exclsuion Ms. Osgood noted that the International Atomic Energy Agency (WAEA) fur the Safe Transporl ol Radioactive Material (TS-"R-1) have a similar, compatible, but not identical requirernenis relating to this issue Ms Osgood stated that there are 23 cert~f~cates of c~ornpliance for package clehslgns that authorized for the transport of spent fuel. In all castes, the packages are designed ttr be critically safe should fresh water get inside of the corqta~nment system. The staff recognizes that there may be cases where certain shipments rni3y be made safely, even though a package has not been evaluated with water inslde. Although no applicant has requested approval crt specific shi~rments that rely on moderator exclusion, it was stated by Ms. Osgood thaI the staff could suppa~rt use of the regulatory exception in 71.55 (c) for certain shipmerits with appropriate risk informalion.

Allow~ny molderator c?xclus~orn for sper~l. tuel transportatior~ would be a niajor lj19partur t: I rrlt111 past safety practice Should the requirements of 10 CFR 71.55 be relaxed to allow moderator exclusion, environmental and rtsk assessments wa~uld need to be reviewed if the practice regarding moderator exclusion were to change. Environmental and risk assessrner~ts have historically rillissumed that criticality is lncredlble. However, assuming water irn Ithe package 1s a

MINU'TES 176TH ACNW MEETING FEBRUARY 13-1 5, 2007 fundamental safety principle that assures margin oll: :i;af:ety against accidental criticalill:y.

""rherefo,re, the staff is seeking commission guidanclle on whether to continue si:aff practice (n..~o general design approval under 71.55), consider delisign approval under '71.55(c::), or begin background preparation for a rulemaking on modera'llor exclusion. Note! that ol:her ol:)ticrn to increase the shipment capacity have been proposad, such as burnup credit. Burn-up credit: is quantifying the decreased reactivity of the fuel due to irradiation in the reactolr.

An explanation was given to the Commm~ttee as to why n~oderator exclusion was needed Ii'lrst, applicarlts wlho ship iissile material will be seeking approval for moderator exclusion for very large-capacity spent fuel packages. Second, DOE (Ilepartment of Energy) will be seeking approval for moderalor exclusion for their non-commercial spent fuel (i.e., research reactor luel). Th~rd, approval of moderator exclus~on may be nseded for the transportation of high burnup fuel il> 45 GWdIMTU)

Note that for high trurnup fuel, SFST has issusd lnter~m Staff Guidant~ (KG)-19, entitled, "Moderator Exclusion." The following salient polnts fronli th~s ISG were discussed: 1 ) under accldent conditions, high burrlup fuel may re-configure, 2) allows, nnoderator axclusion under acc~dent conditions (10 CIFR 71.55(e)) using two ~m@thodli,

3) does not give relirirf from 10 CFR 71.55(b), I e., must stdl be safe with water inside, 4) preserves defense-in-clepth against accidental criticality, and 5) limited to commercial spent fuel Ms Osgood stadled that the staff believes that the guidance contained in ISG-19 could be expanded for other fual types, and other demonstration methods with justification. Applncants would s/t~Il need to dewronstrate subcriticality with water in the containment system. However, th~s tjemonstrati~rn could assume that the fuel is in ils as-loaded configuration. Tta~ra, staft belleves Ihat allowing moderator exclusion under ISG-19 still preserves the fundamental marqins r

~

l safety against accidental criticality.

IUs Osyood suggesled the staff could develop a r~ijk-informed regulation sp~:c.iitically address-Ing moderator exclusion in certain packages under certain conditions. 'Fhe r~~lcrrnakirig plan could slysternatically evaluate rlsks, including rrecurity issues, robustness crf packaqes, accident frequencies, loading and unloading operalticrns, and human factors.

Ms Osgood concluded the presentation by stat~ng ttlat the staff intends, to seerkt com~rnlssloll guidance on the moderator exclusion issue via a pol~~cy paper. This paper will be forwarded to the cornmisr;ion in the near future.

'The present:ation was followed by ques'tions and connments from the ACNW membelrs ar11cY

attendees c#

,ncerning QNQC protocoll. Based on Irhlese discussions, the following p~oints are worth noting:

I hlodcurator Exclusion was briefly re-explained.Il.o ihe Committee. A briti3f cjiscu?ii;sic:)n centerred around why applicants do not want to perform a criticality analysis with the packairged fully moderated. It is believed that the results from the! calcc~lations can lead to limitations on the number of fuel assemblies that can actually be placed inside of a, transl::~ortatior~

package.

MINUTES 176"' ACNW MEETING FEBRUARY 13-1 5,2007 Responding ta a questior~ from ACNW members, Ms. Osgood said thaK ia large1 nun~her of star~~age casks certified under Part 72 and c:u~rrently loaded with spenli fuel probably could [rot be shown to meet criticality safety Iln~its, assuming water is ins~tle the? contarn-ment iiystem, because they werfz not designed to meet Part 71.

Dr. Ryilan was interested in knowing the numtrer of shipments that were rmade thal cantawred water ins~de of the package, the vcrltrme of water contamed in the package:,

and what was the resulting K-effective, It wa!; stated that liter quantities of water have been k~und in the inner containment and the K.effective was less than Stb.

Dl. Ryan suggested it would be helpful to develop quantitative risk inforn1,ation tcr get cl better understanding of the risk from allowing moderator exclusion and allow cumm~ttee memb~~ers to develop informed opinions. He i~nged staff to compile the data from sh~pping

~ncidents in whrch transport packages arrived at their destination with water ins~de TWO rr~~embers suggested that more ~nforrnatioli was needed on this to[~il: to make air inform decision. It was suggested that staff have a one-day workshop (and ~nv~led stakeholders in to discuss the concept of motjelraior exclusion.

The meeting adjourned at 4155 p.m. orr Thursday, FreIbruary 15, 2007.

APPENDIX A Federal Register 1 Vol 72, No. 1.7 / Fr~da~y, Ianuary 26, 2007 1' Notices 3879 I c!ct~~n~nu~ndat~ons kin financiill

' ~ S S I S tant:~ ~lnnier ~IIIII Nstional I 'ou~~datlon onr rlle Arts and the I lunlanities Ac'i of :I 965, as al~lelldt?d

~nc.l~tding infclrrnatinn given luk I onhdence to tlie ahkency. In ii~:curdan~u lvith tile dete~

nr~jnallion of tho Chairmall 11f April 8, 2005, th~llse sessioli'4 will Ile I l o s ~ d 111 the l~iiblir pursuant Lo

,ubsectii)n (c)f6) of section 5f)*!b rrf 'rutlc

' r Unitell Sta1n.s Cnule.

Filrthtrr infolnnatlon with refemt~nct* to I tlesc? mt~etings cdrl be obtainc!{l fro111 bls WCath y Plowit? Worl~ien, Officc: ot Il ;uicielilies & l'iinel Operations, Illatlfnnri!

i.:ndown~ent fi lr rht3 Arts, Wasl ~ingtcln, I')C 20506, or (.all 21112/B82-56'31

!he Arts, 11 lo[) Perlnsylvaniu Averiut!,

IilW., linlarh~ngttrl~,

UC 2051116, i102/682-1532, "IDY-TT)I) 202/68i1-EhrlYli, at least

,fi%ve11 (71 days prior lo ~ ~ I I B lneeting Furl HI ~rlfcur~liatiou W I I ~ ~ ~ I reference to these ~ilecrlirlgs ( an be ob!a~lneti from Ms hathy lJltrwits-Worden, Oflict! of Il iuidelrntas Panel Operlmt~ons, Natlonal P.:ndowmnrrrit fr~r the Arts, Wlashingtorl, FIG, 2[)511+i, 01 caill 202/FiP12 5601 Dutt?d J I

~

~

~

~

~

~

~

y "0, 201J7 hathy Plnwitz-Wnrden, Ivrnnel i[,'~lc,ndlr~r~Yur, Pant:/ O ~ ~ l c ~ ~ ~ ~ l r r r ~ ~ s

~~Jntioriul lrhdonmr'i~tfor tl~s A rtr 1 IVK L)OL 1' 7-1342 Filed 1.L1i-1J7, R.45 a1111 HILUNG CODE T5374ll-P Wednesday, February '1 1, ~r)ta7 ACNW Workiirg 4 ;roup IJrr flrtf i~:~it~ous Activitj White Poper (O,pt'n)

Day 2: I liscussin~l of C:ol~serluch~bc:es of Igneous Activ~ ty 8:30 in.m -8.4.11 (1 171. ( I)ralur~r{;

Remarks a n d lnir oductr~~~rs

--'I'Ui~~

ACNW Chairxl lash will nlakt: opala I ng remarks regartlir lyl the c~~~lduc*i ol today's qessio~ls ACNVC1 MemY)rr I)r.

Bill Hir~ze will1 111 o v l d ~

XI ilvr!~*vnew of the sectlnd day r 11 the WOI ~ I I I K Il ;xoup Meetinfi, incluldulg thrr meeting Irurpose, scope, anti~ip~itrd resulUs, umlrP ilntroduce invited subject riwtter eXlieItS 8:45 1r.m.-5.4:~ p.m.. Heprest~l~l,+tives trom Jolins Hookans U n ~ v e r ~ ~ t v Y<;~thy Plowitz-Wurdan~,

- - -- university of [!ahfornia 1.0s An~eles, i"'(~ncbl Lnrrrd~na lor, P~dncl Operatin ms NRC staff, U n i v ~ ~ ~ s i t y nf llta111, Clark Votlonal Endou~m~r~nS,/or the Arts NUCLVlR REGULATORY County Nevada, and Elnrt.tr~c lJowur I f R Iloc 117-1211ti Filql~d 1-25-07 8.45 iinll C O M M I ~ I O N Research Instilutt! [EPRII) wnll dihcuss IIH.LING COOE 753 1-01-P rnagma,lreposi~ou*v/canis~tur processes in bdvlsorv Committee on Nl~rclrar both eruptive,~md intrusive scen,irlos Waste; ~otice of Meeting and iml)hcation io13 risk fr111l1 lgrmous NATIONAL FOUNQATION ON THE activity at the prtrposed Yiu:cii ARTS AND THE HLi~MANlllES Thv "ivisory C:omrnit!sr 011 Nuclear Mountam repiis~lory. Drlring tl~rs ll~Yastc IAI:NW~ will f~old it16 1i16th Session, panel diiscussic~~ns hy the for the A ~ s '

~llleefrng rbll FsbrlLary 1:3-1~,, 2()07, Room Committee members and ~ n v ~ l e d subject Advisory Panel I"-2H9, 1 1545 Rockville I'iii~,e, liockville, matter trxperts ~ l f l l take lace, h round I3ursuilnt to Secti~lm 10(a)(21 of tht!

!vIarylanri table wmap up durcussio~~

will i"n)llow, when all partic:ipilnts wrll be able lo i't!dt'ral Advirlls~r l'lllmmittee '"'

T I I ~

wlieciuie for t ~ ~ i s intv(1,ting is as pmvide their olllmentr c:omlniLne 11,92-463), as anlerl~ded, notico ir hereby lu,llouls~

y ti ver~ that a meetin/! of the Aml s membe~s will dislcuss their impressions 4dvrsory Panrrl to t,/lle National Ck~uncil

["uesday, Februjlry 13, ZIEWF7 trf the WGM albd rl possihl~~

leti~tr report 1111 tile Arts ww ll be Illelti by to the Comrnissicrn i tblet onfctrellct~ fromr'l the Nanc \\I Flrinktk

, ICNCWVlrkillg C;ruup or I /he igneous Actirvtv CIPhitfb Pi~per [Upel I)

Thursdriy, Febn~rrry 15, 2007 I :enter, 1100 I1enncylvania Avenue, I\\iW, Weshingtr~r~,

1)C 205ct6 f(lll0ws p jay 1 Dkr,r:ussitrn or the lIUil~t~~rlt and 10 a 1ii.-10:1U5 tn.nl.: C)penrr~g Hernorks

{ending lime us s p II oxirnate)

IVobi~h~Ir

1. )I nf Igneous Ac tivit.~

by the ACNW 1Il11uirmai11

[Opelr 1.- -'She Stnte k ~ e, g i o n a ? [ ~ e ~ i o n a ~

Chairml~n will nmke op~iln~~riy lernarks 1';trtllership Agreei~~~ent app1ir:atiuu 8:.i!l 11 rru. -8 4!1 o.m. 0y~~n111,x; regardi~ug the ( onduct ol torla\\,'+

IRVIWW):

Fehr~~ary FJ, 2007. This lneetillg, ]{emrlrk,s ulnd lntroduci~un*~

(Ol~enl-session!i.

lrorrl 4 p.m. tcu 5 p.ol~, eastern ktandartl lqhe A(;NW Chairnmrl wxll make 10:05 a.m.-11 nr.nr.: Snrvmnui'~ Hrver time, will be ~rpen c~pening lemarks regurdirrg the collduct Notion01 Laboraltory (SEI'NL 1 Wul.kshop on Cernentjtio~t~

Materiuls Llse:rf rn The closed iwrtiqlns meetings an' L

I

~

today8u sessions. ACNW Member h Waste I,et.rm,nntion DvIBBs lor the purpose of Planel revit!rIiv, llill H ~ I ~ z I !

will 11rovide an IIIVAIV~BW of

~l~scussion, ewaluatll~on, and the first (lay ot'tl~e Workunyi Group (Open)- -The (:onlmittei~ will t~u briefed

~eco~nmondatlons qln financiirll by a re~~resentntltle fionv Pen11 State Ir,tleetimlg, lncl riding the rnleating purpose, U~versity on SRNL, workd3t on

,rssistance under tlir: Natio~~al L,r:opt:, al~llcrpatud result"^, irnd introduce cemenbtious l,lHleriels lor tcraste b'tlul ldatron 0111 the,Arts and tile Ilumanities of 965, as alrlerlded

~ 1 v i t " ~ i ~ l ~ j e c t lrlatter exlperts treatment, dispaeal, renvediatic~n iind 1111cluding infc~rrriatlon given rrl H:4ir cl an.-5 30 p.m.: Kvrplressntatives decomniissionir~gl, whic:h was lieid in u:n~nfidence to the R ilency. In i~n:c~trdallr:t~ Irom Illniversity of Bristol, 'England, Aiken, !jC on 1le~c:ember r 2-14, 21106.

with the detelmindion of tho Chairmall Hattelln I:nrporation. Un~vtmity C I ~

11 a.m.-12 I t.rru.: Semr.Ann~inr1 11f April 8, 2005, thcvse sessio~ls will tue l.nout11 Flurida, Irniversity I I

~

Nrwada-Las Briefing by tho 1!p'fice oJ1 Fecierurl n111d t"loscrd to the ~)oblic pursuant lo lrlegas, AJKC stafr and D e p ~

tmlrnt of State Materials r utid Envi~nmental mbsection (c]1[6) of section 55tb of 'rrtlt:

I'nergly-Yucca Mountai~r IBroj~?ct Management IJr~r?grurns /FSME) [Open)-

1 1, United Statuis Collie.

[ )peratlolls IYMPO) will ~ l ~ c l l, s the The FSME Office and D~~visiol~

Directors Airy person nlaY lbbserve mt'etillgs,

!:loball.~rir,w ot igneous ;I( tlir~ty and will brief the (:onlmittett an recent and I ) V X ~ I ons therflol', of advisory ~janels that rhallellgcs assoclatlHd with future aotivititls of internrbt rhrithi~~

their

,]re tiipnn to tht, public, and if tinnu?

cbstimrlli~r,; volcilnisrn rscurrerlce and the proParrls

,,llows, rnay b(il perwitted to plrtlclp~le, urr,l,t ofttle sr:ien,.t! [luring 1 p.ml.-2:30 p am.: Bliclbnk: 011 111 the panel's Jisci~ssions at the lnternafionul r:o!rfere~~l: es tjn I";essloll, !)enel cliscussioa~s by 4l1sc1 eliun of tilt: pilllel chairnli~n If q r r ) ~ ~ ( :ornmrtt,le mentbers alld illvit,?d subjet:t Decommissiornj~-i& and II ow level Waste 11ttud spt:c:ial acc:ornmodatio~~s due to a ex),erts will taklr,l~,lcl+

Subjectv (Oper~/l::losedl -FSME

~lisal~ilitly, ple,~stt cc~~ntact the Ilffice of representatives rlwill brief thu (:r)~~~lnittee 2tc~ssAbility Nati~~nal Endormlent fol on theil partic lpatron iril 1 1 1 I'lntm

r l t t ~ ~

n,lteon,il 1 :j,lbft*enr:t: on ! :st on; I, t L, t i nrd tro~ri / l i t 1 I li~rc,ommisso~ln~~n):

I d i

I J ~ I I Bedr Far ilI~t's

,r I I

~

the Sdlt l l ~ : : r ~ ~ ~ i r ~ c ~ t ~ o i i (if Nui leal-Acti~ ltlt, I J~:rt~rrlbt~r

'IOritj 'illiens, Gretkl H u11(1 I.' j I Tc~~:h~~rcal h#rt?Iirr; or) d.Sdlt,Iy l1;uitlik I

1 1 E Lass~ficatl~n ol Railloactlie CYa%1tl 1 Iic I AErr, i i ~

r ~ t i \\ e ~ b e ~

an11 I)ibcth~nt~~>r 0Of1, Vt!nna I u s ria r) 15 p rn.-J 4') p In.. Possl! i ~ a irsc ( I /

li~loflleralnr 12x1 !lusir,~ 17 for Tln~~spc rrl[riir III

~~czcl age.: (0pa1rl)-iteprese~~t~~iibrts hiin1 I lbcl IJRC: Office uf Nuclear M;tkeru,il;

',,~lely and Saleguar ds /NMS,Csl, I l~vls~irli I Sl~etll Fuel "ir~rd ;e and

' ~ ; i ~ i s p u ~ ~ t a i ~ o i IsPI:TI, will bi !el thcl 1 on^ rnittee or ~ > ~

• u l i nillacy ~ ~ I I W L

~lrlounct~ng tiill: dtt eloprnt~nb ol I 1 :c~r~~missioil I'aper tddressing btith Ii~c:hs~ir:dl and r.+hgul~lutory issuth, fc~r Ilo\\ving Mud~:~.ato~

Exclus~u~u

~ C I I I ~.,a~~~iporiat~r~ri~

piickiger 1 r. 1 ~

'-5. 30 p ln Miwellnl~~~oiis I I 1111 n]- 'The (,on~rlittee wiII liisi u. ~ l b 1111attr:rc:

relatell to tile conduc! oi,41:NW c.tlc itlet, and \\peciI~c Issues i liat we)

I I

J

~

r ornpleted duril~g previoli 111:t:t ingh, a., tuarlt: auld ;availabilit oii 11lr11 matior) pibrtrlit Discussicillu nn'tv i r. l ~ ~ t l r Ihe A1 :NW 4cfion Pllrll tvulkl 1 5 fu turn Cornun~ttfrnr~

Meetir~gb 1'1 ilcecIurt+s lc~r t h ) cc1ndut:t i r f Cilul 11 "rtrcipiitien Iln,2(:IdW meetiligs weltb I V I I ~ ~ Y S ~ I ~. ' ~ ~

111 1 I+: Felleral Regihte~ u t ~

I )I t(ij3tlr 12, 2(106 (7 I FR 601911], In I( c:orda~ice w tlh thllse procecl~lrua, u~rn~lii I 11 ~vii'itfeli stal~n~enl s may be lrehentittl I I.,? r~leinl,ers o Q the 1 jublic. Kltll triinic:

I ecut dings xvil be l~erni~tted r arllj I [Iring tl~ost! liortio~s nf the n leeling rI1,lt,wt: open In t l l ~

put)lic. Ptvi.s(.~i~s l i c ~ ~ i ~

ing to 1niikt3 or1~11 staternelits.111r~ll,

niar, lir attjusted bj [he t halrman IJI; I ~clt:c:;s;trv tti f acilitijle the contlur I (if I het I leeling, perscins pl inr~ing lo rittt!ll(l t~olsld notify MI 11as as trr tlr~iil 1,+rtii:~~liar neeah In arctrrdan ti w11h S ~ ~ b s r ~ c t ~ l ~ i i lO(il I 111h L !I248 1, 1 h,l~vc? ~jetermlllt~r!

1!1tli 1 1 I I ~ C I ' I I I)I l i t I, I ? S : M ~ \\ ~

1 1 ) c Il)tilh ~i 1101tit11k I t h ~,

I I I ~ I ~ J ~ I I I ~

I Y O L U ~ ilii(11 J t t, ~JE:,cII~s I9EA i t - ~ ~ ~ t i t l s ~ ~ t ~ : ~ l intort-~~~rl~o~

I purs~sarlt I i ri 1 1

' ~ ~ ~ k 1 [ ~ ) ( 1 ~

Fur t11t I ~ ~ i t o r ~ r ~ a t ~ ~ u ~

~t~l;~hrcli~~g top~cs I,

br r i i h i u 5 ~ 1 1,

ctheflu!~ tile ~rleetlrlg lras I r c v 6 1 1 i.a~\\crlrd rssc lrutlulod, tile 1 : h a ~ r ~ r l a 1's r ulirig nri r~acju~rsth Ebr thti illpol ~ I I I I 11% to jirescal~t 1118 I si;~lienlelrLs lltl llbv l ~ ~ n t !

d l rttod tlltrr fo~rj ctln t ~ e htal~lrri it! a:l~ntdc,ti)ig h11 D~ils.

I

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,kdbl 11111~~tilig dg~ntl,, 111~t:h1rlg ir,lnhc r i l 1 1 4, i r i t l Ictter rtiIu ts,lice vail,itlIci th~ougli tkr Nlih' Puliii{.

1 )IICIY I I I H I b t Knoni (1'13RI

( 1 1 / idrlii'nl.c.g(w, I

1 1 by l:,nllr~ig LIIE PDR at - ~ 4 0 0

.397-I Y I ~

In I I nu1 lhtl IJuhlir I y 4v,lilablt~

I'ecrircis y.iltiln r,tlrni;)ril~~lut 111 NKC I

I O C L L I I I ~ ~ I I s)tste111 (ALlrZRI> ) tir111ch ic,ces,I!>II~

frn811 the NR(: Vbul) site at hltp I ! l 1 Lhf f i l " ~ ~. ~ o l ~ ~ l e ~ ~ i l l 2 l ~ - ~ ~, l /

I ~tioiil~,

11 klr~l (11 littp /'cz~rtcr) nsn, gov/

adrri~-

~rlril'ltc cnllt~ct,i,r~>

{[,1CRS R I CNb11' hltg st I l t l t j ~ ~ I e ~ l ~ ~ g l ~ f ~ i d i l :

VII 1r.u) I c r l e ~ o ~ ~ f e r e ~ ~ c ~ n g

~erb Ice is v a ~ l ~ i h ~ l t h i rihsarvirig olrnn srrrsionu; of ICNIL' ~rln:elilig:. Thust! v ~ s h ~ l l g to 11se 1 his s ~ r vir.$: boll. trbsenring hCNW 111eelluKh ~iI~t~uTd c:cmlar:t Mil". 'Sher011 t 11 ( I ~ V I I ~

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'It>chni~.~a~~

1 101 41' BiMCi) I)t?lwet*~

".:lf) n,rll. and I 15 ji.irl [:'Iq,,it Yt?iist 10 diiys tieiore the 111eelia~~

I i cirl9aw 111t: a \\ ~ p ~ i l ~ ~ b ~ l ~ t y ol this nlrvll 1, I ~siltvid~~~als or s t15t luz,rtion~:

I lcqu~?\\!~lli/lj tlus sprvmce \\ s i l l bth I ~ s p o ~ ~ s i l i l o tnr tt:lephorir I n e 1:hargcs rr~d tcir rrliol~d~rrg tha eclhilrn~etlt an([

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-417 1 4:),in11 BlLLlND CODE 6325 -31+ P SECURITIES AND EXCHANGE COMMISSION

[Investment Colnyany Acl Rullsa~ri No.

27669: 81 2-13308)

American Capital Strat#giss, Llcil.,

Notice of Appllcbtion Jar~unry IY, 200.

AGENCY: Secuf 1t1#

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UNITED S'T'ATW NUCL.EAW WEOEILATCPRY COMMISSION ADVISORY COMMITTEE CllU NllCLEAR WASTE WASHINGTON DC 711555 - 0001 AGENDA 47ath ACNW MEE1'ING FEBRUARY 13-15, 2007 TUESDAY, AI,EBRUARY 13.2007, CONFERENCE BOOM T-2B3, TWO WHITE FLINT mE RQ~KVILLE, MARYLAND ACNW WORKING GROUP ON THE IGNEOlJS AC'TIVITY WHITE PAPER (OPEN)

DAY 1; CBISCUSSION OF THE NATURE AND F3RQBABILITY OF IGNEOUS AC"TIVITbn(

1) 8':30-,',mA.M.

Q D

~

Introductions (MTRIW,,,!H/NMC')

7

" "I# '."7 I..) I The ACNW Chairman will make opening remarks regarding the corlduct of today's sessiions. ACNW Member Dr. Bill Hinze will prolvide an overview oil' the first day of the Working Group Meeting, including the meeting purpose, scope, anticipa,tetl results, and introduce irl'vited subject matter experts.

,I!!:', ;,,,,,;

{:;:,ll,,,

I

.I 2 )

,4i,45.".,, 9 : 1 5 A. I'd.

Dr. Steve Sparks (Uniwiirsity of Bristol, England) vvill dis~cuss the state of Volcanology science and eruption analogs for Yucca Mountain.

,I I 3,)

,Q358 9 : 45 A. RvI.

Dr. Bruce Growe (Batt:ellle Corporation) will discuser the volcanic history of the Yucca Fciloun'tain region and implica1:ions for the risk triplet.

4)

El 45 10:OO ALM.

.Quest~ons and Round Table Discussion all:^

Committee Member Hlinze will lead a panel discussion w~th the invited subject matter e~perts on the two topics lu8t presented 1O:OD - 10:15 A.M.

• • • BREAK*"

5)

~,~..,,,,,~' 10:lZii - 10:45 A..M.

Pnlf. Charles C;onrlar (CJniversity of South Florida) will provide an overview of methodolog~ies in probabilistic volcanic, hazard assessment and application at Yucca Mountain.

61) 1 C1.451 -1 1 :I5 A.M.

Prof. Eugene Smith ([Jrniversity of Nevada - Las 'lS'egas, COarllc County, Nevada contr'actor) will discuss the imporlance of understanding the pruvcilsss of magma generation for volcanic hazard studies about the proposed Yucca Mountain repos~tory 7')

'1 7 I -1 1 0

4

,Questions and Rouqd,, Table Discussion (All)

Committee Member Hinze will lead a panel discussion \\,with t.ke invited subject matter experts on the three topics just presented.

1

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..,/I 4 )

"1 11 :36:1 -l.2A.B,,.YP.M. Dr. Kelvir'l Coppersmi.tYn (DO, -,- YMPO; co~itract!or, leader of PVHA 8 RVWA-,U) will discua;~ the use of expert elicitation in predicting

the! probability of volcan~c events at the proposed Yucca11 Mount,ain repository - objectives, methodology, implicatior~s of th6ir PVHA, and PVHA-U.

Questions and Roun,d Table Discussion (All)

Committee Member Hinze wrll lead a panel discussion wttta the rnv~ted subject matter experts on the three topics jr~st presented I I..

-4 I j ! :j i::

.,pBS#* &.M.

NHC staft representatives (Jack Davis and Dr. John Trapp) WIUH hrref the Committee om the NRC Perspective on Igneous Activtty Issues: Overview of the Licensing Process, DeveYopment of NRC Review Capabilities, and Probability of lgneous,Activity Questions and Round Table Discussion (All 'I Committee Member Hinze will lead a panel discussion wrth the invited subject matter experts on the topic just presented A lrepresentative from the US Department of Eneirgy (DOE/Y MPO) will brief the Committee about DOE'S views on the ACNW draft White Paper in relation to the nature and prediction? of iyneous activity Questions and Round Table Discussion (All )

Committee Member Hinze will lead a panel discussion with 1h~:

invited subject matter experts on the topic just presented.

A representative from C::lark County, Nevada will ~klrief the Committee on the Courrty's views on the ACNW (draft White Paper in relation to th'e nature and prediction of igneous activity.

Questions and Round Table Discussion (All)

Committee Member Hinze will lead a panel discussion 1~1th the invited subject matter experts on the topic just presentr!d.

A representative for tilei Electric Power Research lnst~tute (ES.PRI),

Dr Meghan Morrissey (Colorado School of Mines;], w~ll brr~et the Committee about EPRR's Responie to ACNW's Paper on lgneous Event Characteristics and Probability.

Questions and Round Table Discussion (All)

Committee Member Hinze will lead a panel disc;ussion wnth lhe invited subject matter experts on the topic just presented.

Wrapu Committee Member tiimze will lead a panel discu~ssion, ir'lcluding a sr..rmrnary of the Working Group Meeting.

Adjourn Y

I L

,I 11

Revised AGENDA "17Gth ACNW MEETING FEBRUARY 13-15,2007 WEDNESDA:f, FEBRUARY 14,2007. CONFERENCE ROOM T-263, TWO WHITE FLINT NORTH,BKVlLLE, MAiRYLANQ ACNHJ WORKING GROUP ON THE IGNEOUS ACTIVITY WHITE PAPER (OPEN)

DAY 2: CONTINUED DISCUSSION OF PROBABILITY, AND CONSEQUENCE,S OF IGNEOUS AcwrIvITY I $ ), 8:~30~~~8:35A.\\,iI. Opening Remarks and, Introductions (MTRIWI,,.Rki/NMC::)

The ACNW Chairman will make opening remarks regarding the cornduct of today's sessions. ACNW Member Hinze will prc~vide an overview of the seciond day of the Working Group Mti?eting, including the meeting pl..rrpose, scope, anticipated results, iimd introduce invited subjeoil: matter experts.

,A;;:(:;?

1.1) 8:::35..,,MA.iki4.

A r'epreserrtative from the IJS Department of Energy (DC)EtYMPO) will brief the Committee about DOE'S views on tt"~cir ACNW draft White Paper in relation to the nature and predictic~ln of igneous activity.,

1

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$3 a; :?:r 1 2)

-5kf3@ ". %a& P. F,II.

Questions and Round :Table Discussion (All)

Committee Member Hinre will lead a panel disc~nssion v\\ri,th the invited subject rnatter experts on the topic just presented,.

1,,

, 1 3 )

t-8r9$5-1mr~

A. MI.

A rc?presentative from Sllark. County, Nevada will k~riie'f thlii?

Cornmiltee on the Coun,A:y's views on the ACNW draft White Paper in relatiori to the rrature and prediction ot ig~l-neous act~vity.

1!3)

...,..... &:;3Oc.:1Q,::WA,,M,. Arepr~?!~entativefromlth~eE~tectricPowerResear~cll~~Institutl.ii, (EPRI) wit1 brief the Committee about their views ~::bri the,AC'NVV draft White Paper in relation to the nature a.nd preclictior~ I:::I~

igneous adivity.

,8),j,8.. i,/...

1

14)

MkW1WY?4"lk'.M.

Questions and Round Table Discussion (All)

I Cornmittee Member Hinrte will lead a panel discussion w ~ t h thtb invited sl.~hyect rnatter ~?xperts on the topic just presenterl ll~~~ll:OO,!!~i.Fuil. Prc:r~f.Br~~:til~Marsh(J~:~l'~r'rsIlopkinsUniversi~lty;AC:~~~dWcor~li~~

1 ;p

, 5 r,'ll

,IN, 1,,,, $,

' )/ : ([;JI 1.,,dl,147 will discuss the magma/repository/canister 1:Irocesses in both1 eruptive and intrusive scenarios and implication lor risk ~TOI.II..I igneous; activity at the [~r~op~:Ised Yucca Mountain reposit~~:~ry'.

1 il,, '1:;

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+,k@35~~-d,~~,;M-5,A.IIVI, F~r1::1f.P~1tMoritana1~~llx.ri\\,ii'ersityofCalifornia-Los;.ii4r~gel~i:!s)w11li discuss the thermal ar~cl m-iechanical magmia/cai!iis.ter inte'rac:tions associated with the intr~.~sion scenario at tk~e proposed "(~~.~lc::c;s Mountain Repository

1. , II;~,

,/:;I j,:I ! (,,:;;I f'"

f'Pelt5i - 1 1 :3Q (4.M Questions and Roun4,Iable Discussion (Alljl Committee Member Hirrze will lead a panel disc~uls'siorr

\\,vith th::

invited si,rl:~ject matter experts on the topics just presen1:ect.

1 '!,l:::;l'd:::;~

,98f1;&1888-W m t t m Tim McCa.rlin (NRC: staff) \\#ill brief the Cornmittti?ci:! abouA NR4::l"s Perspecti\\te on Igneo'r.~~

Activity Issues: Ccrnsideration 04 Alternative Conceptual Models i!,,,;;q

';(!(;I 1 1 :4fj - d,mi%@P.M. Question-s and Rou~$,,Table Discussio~ (All:;

Committee Member Hinze will lead a general panel disc:;:l~ssiori with the invited subject matter experts on the morr-ling t~~picsi,.

1,,?, 3 ~ 1 1 $!:

, ( "I,, I:,,,...."I

..... 1,3;80,.--

1 :OO P. M.

• • • LUNCHe**

1 : C)l3,w. S S P RI'#

Neil Colevnan (ACNW staff) will brief the Comrnrtiee abu::,r,.~t Zhti?

/.:'

j

!:I flooding history and geomorphology of Fortymile 'Wash near

\\r'~~cca Mountain.

1

,;:;:;:,,' d/,:>;

Dr, Sara Rathburn (Cola:.)rado State University) will brief t(...hc.:!

Committee on processes of importance in fluvial cind ecdiar-i transport ~:)f sediments.

Questions and Round Table Discussion (All)

Comrn~ttee Meniber Hinze will lead a panel discuss~on ~141th the lnvnted subject matter experts on the four toplcs j l ~ ~ i t presented Member Ruth Weiner will provide a brief sl.rmrrri~lr!/

of vici!wsi or.\\ the resuspension of volcani~c ash and implications to risk from igneous activity NR;C staff repre'sentat~ve will brief the Committee [::In the! !3ti3f.i95; views of the White Papear in relation to the Consii:q~,~enccii>s o't Igneous Activity.

'lk,.\\,

Questions and Rouna,,Table Discussion (All)

Committee Member Hinze will lead a panel discusision witk~ the invited subject matter experts on the topic just presentel:.:A, A repr~tsentativf? frcrnli I.JS Department c:)f Ent.i?rlgy (DC:::IEII'YMPO)I will brief 'the Committee on DOE'S views oru the tI44:>NW clraft White

),.

Paper in relation to the (::::onsequences of igneous a,ctivit!,,r. ' ;;

A, representative from tk~e El3ectric Power Researcih Ins'ti,l:l.rte (EF'RI) will briel the Cornmittee about their views on the ACrNWI dra.ft W t-nile? Paper in rellfation to Consequences of Igneor~s Activity.

Questions and Roung,Table Discussion (All)

Cornrnittee Member Hin,ze will lead a panel disc~s~sion n1itY7 tht:!

irrl~,~itecl s~..rt,ject rriatter expliiitrts on the topic just ~.:)r~~!sentc,!r:::j,.

, ),,,,,'?

,,!I

,,..,.)

,d!,+

2 8 j 5~:f K+ll;:.Tl'5 'P. R'vl.,

A reprissentative from C..;lark County, Nevada, will li.:~rieii' X:he C:c:;:~mmittee on the Con~rrty's views on the ACNVll (draft W bite!

Paper in relation to the consequences of igneous activity i : '

.,,,,J~I~,~'~,,~~~~

1;

,,,\\,,

~1"'""~

34 j

....5,.r.-:I-:5

,,, 5. 45 P, IW,

w.~aL?Jr&?

(All)

L,.J,,, I,f'" """

,;R',I::,)

Colmmittee Member I-,lir"bz~a will lead a panel discuc;sion ia"r~::luding a surnmary of the Working Group Meeting. Somci! of the issues tc:,

t : ~

addressed include::

Has a.n effective a,nd accurate understand in,!^ of the varioxds views on volcariisr'n been identified and docurnented irr the AC,NW draft White Paper?

Have 1:he risk-signifitcant topics regarding iy r~e?ous a'r::tivity I:leen identified'?

Are the technical bases for positions taken for determirrirlg risk fror~i igneous actiwit;!y at Yucca Mountain sci~i:rntificall~y socrntl?

Area there risk-significant topics regarding igneous activity that have rrot been adequately addressed considering the currrent state of the science"? If so, how can they be atldressed?

Public comments Adjourn

'THURSDAJ;, FEBRUARY 15,2007, CONFERENCEBOOM T-2B3, TWO WHITE FLINT NORTH. R~CWILLE. MARYLAND 1 ;

&;llQ 1 1

[',!I 5

35) 14):.011l,~

- W A.M.

Opening Remarks bv the ACNW Chairman (Open) (MTRJAFD)

The ACNW Chairman, Dr. Michael Ryan, will make openlng remarks regarding the conduct of today's sessions.

36) f-8?#-%

M.

Savannah River Nati~nal Laboratorv (SRNLI 1J?Vorkshop or!

i 1

" 11'4., dfl I,:?

1 I

1 1 Activitirsr~ (Open) (AGCiLSH)

(J,~JL I

~

I IC r )

Barry Scheetz from Penn State University will report on] the SRNL workshop on cementlitious materials for waste trsatmenit, disposal, remediat~on, and decommissioning, which was held in,Aikeri, SC, or1 December 12-14. 2006.

37)

'4-Wlf - 12:OCI P M.

Semiannual Briefina by the Office of Federal and St*

I V,,!5 Materialls and Environmental Management P~garams IFSME),

(Open) (MTWAFD)

FSME Office and Divisiori Directors will brief the C:omnlnttee on recent and future act~v~ties of Interest within their respeclllve program:;. M 4 1 4 1 m P t t,

f (1'

1 il /

/ d l,I

38)

l.lWv'=

2:30 P M Briefina on lnternaljlanal Conferences on Dec,pmmr$sion~ng 0

and Low Leva1 Wash Subiects (OpenIClosed) (JHCIDAW)

FSME representatives will brief the Committee on their participation in (1) The International Conference on Lesscrns Learned from the Decommissioning of Nuclear Facilities and the Safe Telrmtnation of Nuclear Activities, December 2006, Athens, Greece and (2) a Teclinical Meeting on a Safety Guide on Classification of Radioactive Waste at the International Atorn~c:

Energy Agency (IAEA), In November and Deceniber 20OFr, Ynenna, Austria.

1 t b

[NOTE: A portion of the briefing may be closad pursuant to 5 U.S.C. 552b(c)(4) to discuss informlion obtained from IAEA to be treated as confidential.]

, id'&/

1' 2:30 -*P.M.

"*BREAKM*

39) 2 3:45 P M Possibl+ use of Modarator Exclusion for Tranmortation"

'1 1 $7 Packaaas (Open) (RFWICLB)

Representatives from the NRC Office of Nuclear Materials Safety and Safeguards (NMSS), Division of Spent Fuel Storage and Transportation (SFST), w~ll brief the Committee on preliminary views surrounding the development of a Corr~rnission Paper address~ng both technrcal and regulatory issues for allowlncl nloderator exclusion for transportation packages. [3:,,

]I

40)

- 5130 FY M Miscellaneous (Oprs~

1 ) (All)

' i 1

9 ' ' I,,

The Committee w~ll discuss matters related to Iha contluct of ACNW activities and specific issues that were aiot completed during previous meetings, as time and availability of informailon perm~t. Qiscussions rrray rnclude the ACNW Aclion Plan as well as future Committee Meetings 5:30 P.M.

,Adjourn Presentatiorr tirne should not exceed 50 perc,ent of the total time allor;aled rtem The remaining 50 percer~l of the time is reserved for discussion Thirly five (35) hard capies and ane (1) electronic copy of the presentation matrarials should be provided to the ACWW in advance of the briefing.

ACNW MEMBERS Michael Ryakn, Chairman Allen Croff, 'Vice Chairmarr James Clarke William Hinre Rui h Weinelr Bruce Marski APPENDIX C: MEETING ATTENDEES 1?6TH ACNW MEETING FEBRUARY 13-15,2007 WORKING GROLIP.PPRTICIPANTS Steve spark,^, Univers~ty of Bsistol, England Bruce Crow, Battelle Corporation Charles Cotrper, Un~versity of South Florida Eugene Smith, University of Nevada, (Las Vegas; Cluimrk County, NV contracior)

Kevin Cloppr~trsmith, DOENMPO; contractor Jack Davis, NMSS

,John Trapp, NMSS Meghari Marrissey, (;olorado School (.I[

Mines)

Art Montana1 (University of Calitornia-1.A)

Timothy MclCartin, NMSS Sara Rathbr~rn, Colorado State University Brittain Hill, NMSS Mick Apted, Monitor Scientific William Melr~on, Smithsonvan lnstitilt~onr Eric SmistaclJ, DOE Engelbrechl von Tiesenhausen, Clark Cor~nty, NV ACNW STAFF Christopher Brown il"JeiY Coleman Antonio Dias

,,,.lohn Flack Frank Gillespie I..-atif Hamdan Cvlichele Kelton Ilvlic'hael Lee

1. lerek Widmayer

APPENDIX C 176TH ACNW MEETING FEBRUARY 13-1 5,2007 ATTENDEES FROM THE NUCLEAB-REGULATORY COMMISSION B. Hill K. Compton J. Rubenstame I. Anchondal B. Ibrahim P...Justun J. Davis L. Kokajko M. Shah A. Fetter A. Mohseni FEBRUARY 14.200.12 B. Hill B. Ibrahim P. Justus J. Ru bensta'ne M. Shah M. Nataraja J. McGaughey J. Kenn~edy G. Gnugnoli

'T.. McCartirb

0.

Persir~ko E. Hackett B. White W. Ruland W. Brach N. Osgood R. Lewis G. Bjorkmar.~

0.

Tang A. Barto J. Chuang R. Whartor~

S. Helton M. Waters M. Shah NMSS NMSSiI NMSS; NRR NMSS NMSS NMSS NMSS NMSS NMSSI NMSS NMSS NMSSl NMSS NMSS NMSS NMSS OIC; FSME FSME NMSS FSME NMSS NMSS NMSS NMSS NMSS NMSS NMSS NMSSl NMSSl NMSS NMSS NMSS NMSS NMSS

APPENDIX C 1 76TH ACNW MEETING FEBRUARY 13-1 5,2007 ATTENOEES FROM OTHER AGENCIES AND GENERAL PUBLIC E. von 'Tiescll!nhauseli M. Apted T. Ward D. Hooper N. Adarns D. Bon C. Connior W. Melson J. Stamataklos R. McCulll~n~l M. Morr~sse'y L. Reiter, ca~nsultanil

8. Crowe W. Boyle K. Coppersrmith D. Bierrnan S. Rathburn~

E. Smistad N. Henderson H. Kawamirnlri J. Ziegler T Andersor~

J. Kessler G. Valentlnel M. O'Mealia F. Perry J. Goto Via Tslecorl~~

R. Benke G. Wittmaycrr W. Patrick S. Mohantz R. Brierrt

8. Sagar N. Pabalan Clark C~~urlty Monitor Sc~entif~c NERMIiYNye County Center lor Nuclear Waste Regulatory Aw1alyse.s; (CNW'RA)

CNWWl CNWKI4 Unlverslity of South Florida Smithsonian Institution CNWWl Nuclear Energy lnstitute (NEI)

Electric Power Research lnstitute (EPRI)

Nuclear Waste Technical Review Board (NWTRB)

Battelle Memorial lnstitute U.S. Department of Energy (DOE)

DOEiYSNL LincolniYWhite Pine Co., Nevada Collorado State University DOE BSC Obayashi Gorp Nye County Nye County EPRl Los Alalnos National Lab. ( LANI.)

Nevada LAN L NUMCr C N W Fu:!i

CNWFUIi, C N W FU:!i C N W w:!\\

CNWWI CNW W!\\

CNW FW!i

APPENDIX iC 176~' ACNW MEETING FEBRUARY 13-1 5,2007 ATTENDEE.&FROM OTHERAGENCIES,&,w GENERAL PVBLIC~CONT!"D~,,,,,

--w,,

W.

Boyte M. Apted E. Smistad L. Reiter, ccl~nsultanli N. Adarns D. Bierman D. Hooper J. Starnatakos N. Henderson E von 'Tiesairnhauser I H. Kawarninri M. Malsch E. Smith Via Telecorn W. Patrrc;k R. Benke B. Sagar

6. Wittmaysrr R. Lenhard K Dor E. \\/on 'Tiesarnhauser~

W. Hodges M. Knapp W. Hendersrrn D. Blaney E. RedrnontU J. Kessiler

,J. Wagner DOE Monitor Scientific DOE N WTREll C N W RI!4 LincolnlWhite Pine Co., Nevada CNWRA CNWRA BSC Clark Cu::~urrty Obayaslii Corp.

EFOM W NLVK:lark County C N W FVr C N W RA C N W RFr C lV W KPr CNW RPr CNWKA Clark !:2(:~urrty H322 Consulting Talisrrnan International BSC DOE NEll EPRl Oak Ridge National Lab.

APPENDIX E LIST OF DOCUMENTS PROVIDED TO THE COMMITTEE

[Note: Some documents listed below may have been provided or prepared for Commit-tee use only. These documents must be raviewllad prior to release to the public.]

MEETING HANDOUTS AGENDA DOCUNIENTQ ITEM NO.

1 Workinn Group on tha lnneous AGtlvitv White Paper

1.

"l/olcanology: State of the Sciene, Eruption Analogues for Yucc;a Mountain, presented by Stephen Sparks,, alniiversity of Bristol, UK [Viewgraphs]

2. Basaltic Vwlcanir, Cycles, of the Yucca Mountain Region,, "V'olcarric: Hazard Models and the Rlsk Triplet, presented by Bruce Crowe, Battelle Memorial llnstitute I\\ciewgra,phs]

3. Probabilistic Assessments of \\irc~lcanic Hazards at Yucca Wlountunn~, NL',

presented by Chuck Connor, llr~iversity of South Florida piewgraphs]

4.

IJrlderstand~ng thu Process of Volcanism is Important fo~r lCalculat~ng the Probab~lity of Future Volcanism at Yucca Mountain, presented by Eugene

'Smith, Univers~ty of Nevada at l as Vegas piewgraphs)

5.

"'bhe Use of' Exper4 Elicitation rn 1I:"redicting the Probability I:::)#:' Volc'anic Events at the Proposed Yucca Moi~ntain Repository-Ol~jectives, Methodology, Implications of the!! PVHA and PVHA-U, presented by Kevin

,,J. Coppersmith, Coppersmith Cn:,ns,ulting, Inc. [Viewgraphs]

6. NRC Staff Perspective on Igne:olus Activity Issues: Oven!it,w of ihe Llc~jns-Ing Process, Development of NFiC Review Capabilities, an~d Probab~lity of Igneous Activity, presented by Jack Davis, and John Trapp, NMSS

[Viewgraphs]

7.

Revrew of IIIOE'S Sosit~ons in th~e VVhite Paper-Nature and Pred~c:tton of llgneous Activity, presented by Eric Smistad, DOE [Viewgraphsl

8. Prelimbinary Corrirrnents on ACN~IIN "Igneous Activity at Yuc:c:a Mounta~ll Techrlical Basis for Decision Mzniking": Event Probability arid Nature? and Characteristics, presented by Mleghan Morrissey, EPRl IVlewgraphs]

9.

Magrrvatic Processes of' Wet and Dry Magma, presented t::y Bruce Mersh,

,Johns-Hopkins University [Viewgraphs]

APPENDIX E 17tiTH ACNW MEETING FEBRUARY 13-15,2007 MEETING HANDOUTS [CONT'D)

AGENDA DOCUMENTS, ITEM NO.

1 (contyd)

10. Viewgraphs or7 thermal and nrrrchanical magmalcanister rnteract~ons associated with the intrusion sctmario at the proposed Yucca Mourrtalrl Repository, presented by Profe~~sor Art Montana, Universrliy of C;aliforn~a, lLos Angeles 1 1. Regulatory Perspctct~ve on Usrs ID^ Alternative Conceptual Models, h,re lselited by Tim McCartin, NMSS [Viewgraphs]

12. Morphology and I-lood History olf Fortymile Wash--1mporliance to '\\,Eolc;$-

nism at Yucca Mountain, presear~~ted by Neil Coleman, A(NW Staff viewgraphs]

13. Fl~~lv~al Pron;esses In Dryland Rivers, presented by Sara Rathburr~, I:olorado State University [Viewgraphs]

14. NHC Perspective on the Risk 1"311gnrficarrce of Poteritial Corrseq~uen7ces from Igneous Activity, presented by Rrittain Hill, NMSS [Viewgraphs:l

15. Review of [30E.'s Positions in lhils Vilhite Paper-Consequences of igneous

,Ac;tivity, presented by Eric Smlisllad, DOE [Viewgraphs]

16. Prelirrrinaryl Comrnrents on ACPrIIIN "Igneous Activity at Yuc;c:a Mckunta~n Fechnical Basis far Decision Making": Consequence Analysis, presented by Mick Apted, EPRl [Viewgraiphsl Semiannual Briefing LPv the Officak of Federal and State Matqrialsmd Environm~ntal Managmment Pronrpm

17. Office of Federal and State Mntu+rials and Environmental Management Programs, presented by Charle:; Miller, FSME [Viewgraphs]

18. Division of Materials Safety and State Agreements, presented bl'y Jan(?!

Schleuter, FSME [Viewgraphrl

19. Division of Waste Managemer~t and Environmental Protctclion, 1.lreserited by Larry Camper, FSME [Viewgraphs]

20.

Division of Intergovernmental L~aison and Rulemakign, ~art3sentetl t-~y Dennis Rathbun, FSME [Viewgraphs]

APPENDIX E 176TH ACNW MEETING FEBRUARY 13-1 5,2007 MEETING HANDOU",iJS (CONT'D)

AGENDA DOCUAEWTS lTEMNOZ.

38 Briefing on InternatiojdC_onferenr;s_q on Decommissioninlg and LovvTLevel Waste Subiects

21.

International Conlerence on lossons Learned from the C~ecomrri~~ssran~rly ot Nuclear Facilities ;and the Safe! 'lrermination af Nuclear Activities

[Handout]

22.

Dverv~ew tnf R~tvisnons lo DS 3913 Classification of Radioa(,tive 'INasle, presented by Chrrstepher McKemney, FSME [Viewgraphil;]

39 Possible Use of Moderator Exclu~ion for Transportation Packago8 23 Moderator Excl~~snon rn Spent F~~leli Transportation Rackagfts, presented by Nancy Osgood, NMSS [Viewgrasphs]

APPENDIX E 176TH ACNW MEETING FEBRUARY 13-1 5,2007 MEETING NOTEBOQK CONTENTS TAB NUMBER ($31 DOCUMENT'S -

Agenc:la, I 7'eth ACNW Meeting, February 13-1 5, 2007, dated F::~rt::lruar)f 2007 (Revised)

Colo~ Code.-,,

'1 ';?elh A,CNW Meeting, da1:ed February, 2007 36 Savannah River National LaboratmaSRNL) Workshop or1 Gementitious Materials Used in Warate Datermination Activities 1

Status Report 38 Briefinp on International Conferenc~

on Decommissioninga and Low-Level Waste $uble&s

2.

Status Report 39 Possible Use of Moderator Exclusicl~n for Transportation P2$&e_$;

3.

Status Report

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