ML19262A142
| ML19262A142 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 09/05/1979 |
| From: | Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| References | |
| HOWE-233-79, NUDOCS 7910260428 | |
| Download: ML19262A142 (18) | |
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NRC PUBLIC DOCm7 B.COM .
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- / Stephen H. Howets
,/ ' nen-UM' atq* 25*,7 Senior Vn*ce Presutent
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cen rei oms.e: ig4s won pe,nen me.4, Jukson, utenigert as-ci . (517) 7es4453 Septenber 5, 1979 .-
novo-233-79 ,
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Mr J G Keppler, Regicscl Director Office of Inspectica a.::d Enforecnent j' -
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'p q/ ./p' W US Huclear 2cculatory F c=issicn C /? Q Re;;1cn III -i O r[f?:f,S &
.r 799 Roccavelt Road W/
Gler. Ellyn, IL c0137 /
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IGIJa?D UUCLFJJ1 FIJJ.'l' -
Ui:". E0 1, DCC"?:' ~0 50-329 U:TI'2 NO 2, ECC'G.T TO 50-330 -
SETIlEC;I OF DIESEL Gr.L*J:'OR FOUNDATIC'!S .CD IUILDII:3 -
File 0465 16 SFi!AL Eove-233-79 Eeforences: 1. 5 H Ecrell letters to J G Keppler; Midland Euclear Fl nt; Unit No 1, rocket Uo 50-329; Unit no 2, Docket No 50-330;
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Scttiene-t cf Diesel Gencrnter Fcundaticns cnd Buildi:q:
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- a. Serial Heve-183-78; dcted septenter 29, 1978
- b. Serial Ecue-230-78; det ed I:over.ber 7,1978
- c. Scrial Ecve-267-78; C ted ':cca:ber 21, 1978
- d. Serial Ecve-1-79; dated January 5, 1979
- e. Seric1 Ecve-58-79; dated February 23, 1979 '
- f. Serial Mcva-132-79; dated April 3,19'f9
- g. Serial Ecue-174-79; dated Juns 25, 1979 -
- h. Seri:1 Ec*.:e-219-79; dated I.'.:;ust 10, 1979
- 2. G S Kccicy letter to J G Kcppler; Midi:nd Project Doc!: t No 50-329 and 50-330; liespence to 10 CFR 50 54 - Eequ-st en Plsnt Fill; Serici Q25; dsted .*,pril 2k,1979 ,
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3 s a Ecv2111ctters to a n Denton; :ndland Project; Decket No 50-329 and 50-330; Respent.c to 10 CFR 50 54 - Reqpest on Plant Fill:
- a. Serial Ecve-160-79; Eev 1, doted May 31, 1979 with ceples to J G ::eppler
- b. Serial Heve-199-79; Er. E, deted Ju2;- 2,1979 vith copies to J G Keppler P00RORBINAL Wm q 910'16 0 M
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Hove-233-79
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This letter, as were References 1.a. throu6h h. is an interim 50.55(c) report on the settle =ed of the diesel Eenerator foundations and building.
Ecclosure 1 provides an update of the status of the actions previously discussed in References 1, 2 and 3; the remedial verk in progress or planned; the schedule of activities; and the results of the further investigntion of the leeking air line in the tank far= area.
Future 50 55(c) reporcs vill discuss the folleving in more detail:
- a. Settlement criteria for the horated water storage tanks and the lines into the cuxiliary building.
- b. Design bases to eccply with the intent of the draft Standard Rcriev Plan en Ecuatering.
- c. A Q,"a"ty Assurance Plan for inplece= ting the per=aned site devatering r/Mm. .
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- d. Provisiens =cie for the train boy tracks leading eff'ect en borated us.ter storage lia.es.
Another interi= report vill be sent on er bercre doves::er 2,1979
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S b.d --. '[&wG DEH/UR3/lb Enclosure 1: MCAR 24, Settle =ent of the Diesel Generater Foundations and Buildirs (Insufficient Cc pection in Plant /c.es Fill Ralcted to Soismic Cctegerf I Structures cr.1 Facilitics), Interi:
Report #7 dated Aug.st 17, 1979 CC: Director, Office of Inspection L *"--~~ent Att: lir Victer Stello, U3:!P.C (15)
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Director, Office of Menagenent
. Infer:stien end Prce . Centrol, US?:?.0 (1)
Director cf Huelear Reacter Rc;ulatten Att: Mr Deconic Vcssallo, Actirs Directer Divisica cf Project M:nageneut U3:20 Washirgten, DC 20$55
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3CC: JL3acen, M-1085A WR31rd, JSC-2163 TCC0cke, Midlard JLCerley, Midland LZCurtis, Lechtal AA IJJ)rcisbach, Eachtel-Midlard DEIorn, Midland CAIIunt, P14-2093 .
GSIeeley, Plk kC83 MJKoschik, !!-890A ,
E.7.arguglio, JSC-220A E! iller, Midland JI'Jcvgen, 3cchtel-:41dland JEut;;ers, 22chtel M W_bbs, IISS Rcute: 3'4;/SEH/ File: 0.k.9 20
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- Enciosure 1 Heve-233-73
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Bechtel Associates Professional Corporation
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M CT: MCAR 24 (issua19/7/78)
Se:tle=es: of :he Diesel Geners:c ?cu=dati:ns and 3uild1=g (hsufficient Cc= pac:1:n is ?las: Area Fill Rela:ed :o Seismic Category I Strue:ures and Fa :ies)
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IYF. IZ?CET 7 DATI: August 17,. 1979
?RCJEC'": Consu=ers ?cuer Cc=pany Midla:d Plan: Units 1 & 2
- 3echtel Job 7220 .
Int eduerien .
This report briefly describes =odificatic s of pla==ed re=edial actions for por:1ces of the a"* '* 7 building, feedva:ar isolatics valve pits, and diesel generator buildi:g and foundacicus reper:ed in I::eris Report
, 6. 54-d'a: to previous is:aris repor:s (1 th:: ugh 5), i: also s"--*:1:es activi:ies rela:ed em Seis=ic Ca:egory I s :uctures and utilities fcunded on plan: grea fill. Results of soil 1:ves:1gations =ade is the above-
=enti::ed areas have been repor:ed in previous interis reports of MCAR 24 Desc-istien of reficionev A) Diesel Genera:c: 3tilding and Fou=da ions Ihis has been described in detail is previous In:eris Reports 1 th: ugh 5.
- 3) Anv* ?dary 3u11di=g Elec::1 cal ?enetratics Areas a:d Feedva:e .
Isola:1cn Valve ?i:s The ex:a=: of inadequacy of f*.11 =aterial under both the Uni:s 1 and 2 of the aur*H2:7 buildi g electrical pene::atica areas and feedvater isolation val e pi:s has been described is Interis Repc : 6.
C) Auxiliary 3uilding Railroad 3ay Interis Reper: 6 stated :ha:, based on boring records, the upper 13 f eet of sand backfill say have liquef ac:1cs po:ential. Eevever, further evalua: ion of soil investiga:ics indicates liquefaction pote: M s1 is unlikely in the rail: cad bay area. Settlement of sand due to grcund cve=en: duri:g an earthquake (seissic shakedcun) is
. being ..aluated.
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Interis Raport 7 Augas: 17, 1979 Page 2 D) Service Water ?u=p S::ue:ure The deficiency in this area has been reported in !=: 2:12 Reper: 6.
Cor ective Action A) Diesel Genera:or 3" d' g a:d Tou=dstions
- 1) 2:eload P:sicadi=g, as discussed 12 previous i=:eri= repc :s, has been ce=pleted. prd=ary ec= sol'd,-d-n of clay has been ** eved together vi h as adequate da:a base for predi:1:1:n of icng-
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- 2) Re=edy for liquefaction .
The soil i=ves . iga.:io:s at the diesel generate: build 1:g shcued the presence of :enes of sand, i=cludi=g sc=e porticus vi:h loose sa:d. *his indicated a pote=~ for liquefaction
, duri g earthqus.as. I::etia Report 6 1:cluded.a suggesti== to che=ically g cut the sa:d havi g liquefacti:n potential.
,Grou:1:g, using proper che=icals, vculd be f easible. 2 .+"er, i: veuld be difficul: to posi:1vely sta e whether all significant zones havi:g liquefacti:n potential had been identified and trea:ed, because of :he prese:ce of discontinucus sand le=s and fine-grai=ed sands.
A deva:ari:g sys:es has been selected in lieu of g cu:1:g.
Ce:sils of a per:a:ent deva ering systes fer the general plant area are described is See:1on E of corrective acti:n pc:: ice of this report.
- 3) Seis=ic shaked:vn Settle an: of sa:d due to seis=ic shakadev: is bei:g eva'.uated.
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B.echtel As_sociates Professional Corporation um 24 Interi= Kapor: 7 August 17, 1979 Page 3
- 3) A"Wiiary 3u11di:g Penetration Areas and Feedvater !sola:1cs Valve
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Pi:s Interis Report 6 stated dat the unsui:able fill =a:arial under both the units of a"' d' d$7 building elec =1 cal panecratics areas a d the feedvater isolation valve pits vill be re=oved and replaced by less concrete. Based upcn further evaha: ice of de planned :--Ad actics,. it has been decided that the ends of the a, r et4, y budd 3 elect d-'1 yenetratic:r areas adjacene to the feedvata= isolation valve pi:s vill be. supported en caissens.
These caissens will p cvide per= anes and positive support for de elsetrical pene::stian areas ed vill lead :o satisdac: cry results inespective of de na:ure of :he fill be=ead dese areas. Therefore, fill u=derneath these elec:Tical pene =atien areas vill =ct be re=cved. The unsui:?le fill beneath :he feedva:e iso'.a:1:n valve pi:s vill be re=oved and replaced by concrete backf: *.. ,
Phases of the emedial actions for the au:rd'd'7 build 1:g elec:Tical pe e =atien a:ecs and the feedvater isolatics valve pt:s are as fallevs. .
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Preparatecy work
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n) Te=porary exter=al supper:s Prior to underpi =1 g cperaticus, a te=perary support for the feedvater isola:icu valve pi:s vill be provided as dese:1 bed in Interin Report 6. 7er the aux d liary building electrical pene :ation areas, results ei a s::actural analysis indicated tha: the external te=pera:7 supper da. scribed is In:eris Repor 6 is :o: caeded.
b) Inser=ents:ien a:d =cni::ri=g Instru=entatics a=d =enitoring vill be carried out as described is Interi:2 Report 6. The auxiliary tailding penetra:ics area and the feedvater isolation valve pi:s vill be =enitered to ensure tha: :he building =ove=ent is no larger than 1/2 inch.
- 2) Local deva:eri:g Prior :o and during excavatics and u=derpi=si=g cpera:iens, in the electrical penetra: ion a:eas and :he feedvater isolatice
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MCAR 24 Interi= Report 7 Augus: 17, 1979 Page 4 valve pt: areas will be devacerad as described in Interis 2epor: 6 a:d also is Sec 1:n 3-5 of "Ac.1vi:1es Related to Plas: Till and Settlese :" in -J:is report.
- 3) F.xcavation, u:derp'- ' g, a:d cencre:e backf'Tag D e plan and schecar' ,deas of excava: ice, u=derp#- # g, a:d concrete backd
- g are shev 12 Figures 89 and 90.
When the general g cu:6.acer :able has beec icvered by devateri g to app =ri=atelf elevatica. 600', a vertical access shaf (appr xi=a:ely 20 x 20 fee ) vill be dug frem eleva:1:n 634' (grade eleva:1cn) :o eleva:1cn 603' . A ::==e1 vill be ade undernesch de feedt*: : 1solstics valve' pits as a cen:inuati:n of the access shaft.
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Soldier piles or caissons consisting of c= crece-filled steel pipes together vi:h =c=de:eriorati:g laggi=g =aterial vill be
- used to secure the soil under :he :urbi e bnd w 3 nis la:ersi support will preven: soil =ove=es: u= der the adjace==
- turbine building duri=g u:darp1==ing cperations for. the auxiliary buildi:g electrical pene :stien areas a:d feedvater isolatiert
' valve pi:s. ne supper. vill be designed for a hyd: sta:10 head f:=m elevatics 627' to the bott:s of mass excavatica u= der the st:ne: ares, earth ; essure leads fr m soil be ea-Ji these b""M gs, reac:icus f:cs the te=porary exter=al supports for the feedva.er isolatio: valve pi:s, and turbise buildi=g colu== loads plus the applicable base slab pressure. ne depth of the inizial excavation where the earth is =c: suppus,ted vill o exceed 4 fee: if 1: is vi:his 6 feet of the K line (see Figures 39 a:d 90) . Othe: vise, a -s+'-- depth of 7 feet vill be used. After the ini:dal excavatica, lagging vill be ins:alled and back-packed. ne lagging alceg the I line located below elevation 600' vill be g =u:ed. Prior :o excavatica of =a:erial
- frem under or withi 7 fee: of the fcundations of :he a"v*:7 or curhise buildi:gs, the sa:d =aterial vill be g:cu:ed.
Caissons c esisting.of concrete-filled steel pipes vill be used :o underpis :he auxiliary building electrical penetrati n areas. For each of the ele ::ical pese: acion areas, caissons
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Men 24 Iste:1:2 Report 7 Augus: 17, 1979 Page 5 vill provide pe==anen: supper: having a vertical resis- ace capacity of approxi=a:ely 4,000 kips. he caisso:s .1 se jackad th:: ugh de fill =a:erial and will also provide =an-size working :=cs for de=cli:1:= of concre:e obstrue:i= s, if .
encountered by the caissons. Caissons will ex:end at leas:
4 feet. into the -d'i . Caissces a:i piles to be used as pe-s e::
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underg d - d ? supporr for :he a * :7 5"d ? pene:ra:1:n areas and the :.::bine b"*' Ad g vill be lead :ested for a
-a d d-- ei 1 T ti=es the design lead.
ne existi:g u=a,.d.:able ba4*d =aterial under de feedva:er isolatica valve pi:s vill be ex=avated and re=oved down to de till if required,. ne extent of backdill re= oval win be decer:1:ed en the basis of soil tests and available boring _
1:for=ation. Ma=ual or echa:ical eans ill be used to excava:e and re=ove u= suitable sa:erial. Conven:1cnal ::cis, such as rock, splitters a:d de=cli:1o=. cols, vill be used :o disloca:e a:d/or re=ove hardened :aterial during excavacien.
Excavation will not proceed :o a depth g sa:er than 3 feet
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below de g cuted lagging. Proper precautic:ary seasures will
- be :aken :o prevent move =ent of fou dati== =aterial ou: side
,the e3 avation area.
Aftar re= oval of all unsuitable fiH =aterial, the excavated area vu l be backfin ed vi:h concrete. Concrete vill be poured is lif: thick:ecses of S f aec -=+m_-', except the first lif , which vill be nc = ore can 2 feet thick. Successive lif ts will be develed 1 :o the precedi=g lif t, ne top =os:
lif win be .rithis 6 indes of de bottes of de e:isti:g slab. ne re=a*-* g void be vees cocerete backfill a:d the fou:datien slab will be elder dry-packed or pressure-gr:uted.
Except at the con a1==ast base slab area, a 4 4 of a 2-i=ch gap will be p:= vide d between the concrete backfin and the adjacen: s:ructures (the contai==est and turbine buildings) by using ethafeas or s* di i joint separati:n sa erials. *he
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concre:e backfE1 win be utill:ed to resist the lateral lead fr:s the auxiliary building.
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EdT4 Interi:2 Repor 7
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August 17, 1979 Page 6 C) As ' * 'ry 3"d ' dd g Rail: cad 3ay
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'"*a' 7 In addition :s the conclusion .ha: liquef actics poten a is 3-*:e in the ad ' 'ary bud ' '4 g 2 di cad bay, deva:ering vill
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the possibill:7 of liquedac:1:n.1: his area. No c:her c:::ec ive action is :equired. Details of a pe=a:en: devateri g syseen for the ge=aral pla== aren are described is Sectics I of :he cc:rective actics por:adn of this report.
D) Service Ta:er ?u=p S :cc:ure Correc:.dve ac:ica for the service water pu:p structure has been
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reported i: I ceris Repor: 5. .
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E) ?ar:anen Deva:ering fc: Ge:ersi Plant Area
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A per .anent deva:eri:g syste:s capable. of icuering :he g:cu dvater level in the power bleck to app:=x1=a:ely elevation 600' vill be i= stalled. The plan: devate 1:g sysens bei=g develeped vill sa:isfy NRC regula:icus. Pe= ace:: area devateri:3 is a posi:ive solu: ion
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to the liquefac:ics potential in a=y part of :he fill vi:hin the devatared :ene. Further= ore, pe=anen area deva:aring can be si ply a:d ef fectively =oni:ored, pri=arily through :.se use of pia:c=sters. One of the greates: adv::::. es is the =argin of safe:7 inherest in the ti s lag duri=g recharge of the devatered
= cue if ths pu ps fail. Therefore, a pu= ping systes failure resui:-
ing frem an earthquake vou'.d not elis *-tate the protect'=n achieved by :he deva:eri:g.
!= addi:1 n o bei:g a posi:1ve solu:1cs to the liquefac:ics potential wherever there is a layer er pocket of loose sand, :he devatering opera:1:n vill substantially reduce se::le=e : tha:
sight be induced by seissi: shakadevn.
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1H 7 191 P00RORGNAL
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MCAR 24 I=teri= Rapor: 7 Augus: 17, 1979 Page 7
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Activities Related to Plan: Fill and Settle =en:
A) Diesel Ge= era::: Euildi:g and Founda:icus 1), Zu11 ding se::le=en:
Figures 43, 44, and 46 :hr: ugh f 6 have been upda:ed :s shev the se: le=ese da:s for the diesel ge=ersar build 1=g and fo"- d=~d ens, bar:cs a:chers, and surface places as of ,
Auguse 6, 1979.
The readings takes frem de set le=en: arkers indica:e hat settle =es:s were essen:d ="y s:able duri:g the last seversi veeks. Further ore, de plot:ed data of :sa s'e::le=e== versus logarith= of ti=e i=dicated -J:a: de pri=ar7 censolidatics is essen:1 ally ec=ple:e and tha' residual set.le=es: vould be
. pri=arily due to sacendary c =pressic=. pie:c=eter readi gs
. duri g the period of preload indica:ed tha: the porevater
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pressure rise duri=g the preload was s=all. and dissipated rapidly, a=d :he pie:::eter readings were esse =:ially stable
- at approx 1=ately ercu=dvater level during :he las "several weeks, :hus subs:a=:ia:1=g c =ple:1cn of pri=ar7 censolidation.
To accurately predict the resideal settle =ent during secendary c==pression, certain borros anchors have bees = edified to obtai: measure =en: accuracy to + 0.01 i=ch. This was achieved
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by the followi=g =eans:
a) I:stalla:1on of four deep borros anders, as shown in 71gure 88, in the till (tip eleva::uc 535') for use as local bese'--n-ks b) Modification of accessible borros anchers and the pedes:al rods The codifica-J.cn censisted of reduci g :he reds abeve the fleer as necessary, and at schi:g a fla: =e:al reference surface to the floor alongside each red and a reference surface on each red itself. A portable =echa=ical dial indicator heigh gage was used :o deter =ine the elevati:n difference be:veen each pair of refere=ce surfaces.
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- MCAI 24 Is erts Repor: 7 August 17, 1979 Page 3 Five Sondex syste=s were installed.ae :he loca ices shewn in Figure 33 o =c=1:cr the rebou:d d" ' g and af ter preload. re=cval. The Scudes sys:e=s c:nsis: ef a cc : ga:ed plasti: cube with wire de:ac::: rings veu=d ar:und the tube at app: *-=:ely 5-fco: 1. .e:7els. The five tubes were i=s-=" ed is bori:gs d: f ed :: elava:1:n 535' . A prebe ec - d-dag as electrical coil sill be levered dess the : be en .he e=d. of a survey :zse,. vid an elect:1 't cabla c ==ecti:g the coil to a pcver source and 1:dics:=r at the. surface. Th:= ugh de pri ciple of indue:ics, the proba vf.11 detect. de locatien of de =e:21 ri:gs; che i= dica::: vill peak whenever :he p:che is ces:ered i= the c: css axis of a detec:cr ri:g. Measure..e:: accuracy vill be i= proved by using a vinding =acbMss ed dial indica:cr at the surface, referenced either :c. a bracke on the outside of the buildi:g or ec :he =ez: sri =a ficer. In additics to the in situ shear wave velecity =casure=ar. s, the rebou=d ceasure=e : vill be used :o esti= ate the s dulus of elas:ici:7 of the supporti:g soil to verif7 the ra=ge of soil para =es:ers used is dy-*- de analysis.
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- 2) Preload cperatica
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Since April 1979, when place =ent of preload was c =pleted, the ra:e of se:.le=ent has decreased such tha: there has been esse d '"7 o se::le=ent for the las: 6 weeks (see Figures 43 and 44). Sufficient data have been ob:siaed to allev predictica of long-:ers se::le=en: by extrapolatien.
Pre'd-d-ary calcula:1ces based en presen: data indicate tha: tha residual se: Ele =es: due :o secondary ce=pressien .
of clay vill be less than 1 inch ever a peried of 40 years.
The, prelcad cpera:ica has been successfully c =pleted.
The accep.a:ce cri:eria have been =e: by providi:g a reliah'.e residual settle =ent predictice. S::uctures, ce=ponen:s, and u:ill:1es will be designed c verified to acce==cdate the Iceg-ter= se::1s=en: vi:h an adequate
=argin of safe:r. Re=cval of prelcad ce==enced en Augus: 15, 1979. Settle =en: easure=e::s v111 centinue during and after :he re= oval cf the prelcad.
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- MCAI 24 lsterd.s Report 7 August 17, 1979 ,
Page 9
- 3) Seis=1c a:alysd.s The sels-d- a alysis, as discussed is 5:e:f.2 Repor: 5 has been ce=pleted for a range c. scil para =eters. An evalua:10 of the effect of changes in seis=le respcase ce the syste=s, c= ,.cnents, and d e se::::ure is is progress.
?:at'-d-m y reviev indicates :ha: .he effect is d d-='.
Upcu re==vsl of the preload, .he ac-- =' soil parsse:ars will be de:e==1:ed and c=t:: pared. vi.h he vshes used is the s** * - a alysis.
- 3) 2'*d'#s 7 :uildi:3 Ilec =ical penetra-ics Areas, Cost:cl Tever, and Feedva:er Isola 10: 7alve ?its ,
- 1) Settle =e : =cci:::1:g Figure 2-1 shovs- se :lesen: daa as of Aug1.s: 6, 1979.
Crack =2ppi 3
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Crack =aps for these areas are shev= 1: Figures 76 th: ugh 79
.of I:ceri: Reper: 6. In additi: , enclosed are Figures f5
' through 87, which ce=plete the crack =apping for :hese areas.
- 3) Seissic a:alyd The =athe=a:ical medel used fsc seis=le analysis of the auxiliary bit # W g elec=1 cal penetra :.cc areas vill be = edified to reflect the remedial action for the elec::ical penet:stice areas and .he feedva:e isola:10 valve pi:s. A seis=ic analysis vill be perfor=ed :o evalus:e :he degree of charge cf the s::ue: ural frequencies. Upon ec=ple:icn of the analysis, the effect of pessible changes in seis=ic respcsse ce syste=s, c.,,=pece ts, and :he structures vill be evaluated. -
- 4) St uccural analysis The =edel for the atmd Mary buildi=g elec::ical pene=atics areas shev: 1: Figures 71 and 72 of In:eris Reper: 6 vill be revised to confo= to :he re=edial actics fc the auxiliary
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building electrical pe e::a:icn arsaa a:d the feedva:er isola 1:n valve pi:s. "'he pe =a:e:: c editics of :he auxiliary building electrical pece::stics ar=_as vill bc si=ulated by provd'* 7 spr1=gs Oc represes: the caissous. 7e::1 cal and hori:o 21 seis=ic edf ac:s, pipe break, a d live lead vill be i=chned.
D e Zech:e1 Stress A=a. lysis ?:=gran vill be used. :s cc:Sise tha resul a.
- 5) local deva:eri=g A ce==:ac for local deva:ering was awarded en July }3,1979.
Edtc::: vells will be ins sed :o eleva:1c= 580' cr to the
- cp of the original clay, whichever is higher: The veils ".11 he placed arcu=d the underpi::ing ex:2vaticus includ1=g wells placed through the : 5 i building flects to ec=plete the '
systes. Ts da:e, the suc2ca::ac:or has =cbilized equipmen:
a=d is ins "* g valls.
C) A* ry 3uildi=g Rail: cad 3a7
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- 1) Crack =apping a
Crack caps for the rail: cad bay are shev 1: Figures 84 and 86.
- D) Service 'Ja:er P'. .p S: ue:::e
}) Shear-vave veloci 7 =easureme::s To accura:ely de:e:=ine the dy"* 4e soil-pile is:eractien cross-hcie wear-vave veloci:7, seasure=e::s has been =ade a:
Loca:10:s G-1.hrough G-6, G-5A, and G *'A as shovu 1:
Figure 67. ~hese loca:1ces cor espond :c the p;cposed pile locaticus. 3oring legs for :hese c cssholes are gives in Appendi= 3 of this report.
E) General Pla=: Area Fill Invas:1ga:1c=
Several tes: pits (lA, 2, 2A, 3, 3A, and 4A) and two pla:e lead
- ests have been sade is the pla:: area fill :o de: ermine soil preperties. The loca:icus are shev 1: Figures 67 a=,1 91. The resul:s are being evaluated and vill be presen:ed la:er.
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- 7) 3 era:ed Water 2:orage m'm and Task Tars Area
- 1) Tank f ars i=vestig"d ~a .
The purpcss of this invas:'gati:n was :o evaluate cc=: erns regardi=g 4.: bubbles cbse:- ed alceg the souther: par: cf the
- ank fars ces. Se bubblas were generated by a laaki:3 u=de%. c.d air 11:e at ap .#=s:aly elevati:= 611' . nis lisa is :o lenger i= use. Tigure 91 shews :ha loca.icus of seven. arses v'nere air bubb .as were cbserved. .
In order :s i=vestiga:e pos.sibla da= age :s de c._,. acted f
is the area and peces-'s' ' d :s of re=cval of a 7 u=sa:is-fac cry =a:arial, five bor_:gs and cne 1: spec:1:n pi: vera d made. ne loca ices of the bori:gs were generally near pe_.2 where air bubbles were cocad. The inspection pi: vas located nea: the'Seted- Category eas: bora:ed water s:crage tank .
(3W37). roca:1cus of the =.sv borings are shown is Figure 91.
The hori:gs indicate tha: ::e =aterial belev the esp a fee: is satisfacco:7 a=d ccesist vith previcus i=vestigaricas a:
, the ta=k fa:n area. The __.g 4 fee: of =aterial at the
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loca:ic:s of bori:gs T-22 _::= ugh T-25 (see Appendi:c 3),
, placed as :e=porary fill allev access for d:id g rigs, vill be re=oved.
The i=spection pi: shews 7:s: =a:erial f:es eleva:10 623' to 624', and =arg1=al =a: aria . from elevatiec 624' to 622', which is lo" ed :o the area ::E the ins e .cti:n pi: due :o previcus excavaticu a=d const:.:c:'- ac:1ri:1es is this area. ne sa:erial was satisfac: cry ... eleva:1:n 622' :o 616 ' a=d censisten: vi:h previcus d s' noted is the subsurface inves:1ga:1:n a: this ares *he 1: spec:1cn pi: shewed :o evidence of any unde d '--- due to at: bubbles. A.11 = sui:-
able =aterial, as de:er '~d by soil testi=g, is the :ank f: :
area vill be re=cved and :zplaced by sui:able ce=pacted fill under the supervisies of ~ cusi:e geotechnical soils e:giseer.
As previously stated in - -is Repor: 6, :he 3WS""s vill be filled with water is c >- :s perfor= a f tll-scale tes: of subsurface saterials. 7 'a:=cre, se::le=en obs ervatie:s will enable reasceable r> ~ ~: predic:1 cts tha: take into acc u== the actual subs- - e em:41: ions u dar ac:ual. Icadings.
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MCAR 24 Interin Repor: 7 Augus: 17, 1979 Page 11
- 2) Crack =appi:3 Crack caps .for :his are.a are shcun is Figure 87.
G) 7.=ergency Diesel Fuel Cil 5::: age Tasks .
Based cu :he c= clusics of 3ect :el's censul:a=: 1.3. Feck, the emerge:cy di&sel fuel oil scarage :anks are buried s::uctures tha:
have al:end7 bee = subjec:ad to a. full.~setia leadi=g by fd *? vi h wa:er. Se :le=est.s u:da :hese tuse rendi:1.~.as vers d '-'1.
Actual se::le=ese of the tanks will be associa:ad ; d-*"'y vi:h settlement of de unde:1 1=g 7 and surreu:iding fill' under 1:s evn weigh:. 3ecause the :anks vill be se:: ling vi:h the fill, de diff eren:ial =cve=ents be:veen the tanks and :he su.rcu=di g soil and piping vill be -d '-*', a:d the ec: ectiess can be expec:ed :s settle appr:xt=ately equally vi:h the tanks. T. misting d,e: ails have reasecable flexibili:7 which vill acc. _ edste such sna11 differe=:ial'
=cve=es:s. No further re=edial acti:n is required.
Underg :u:d Utilities
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- 1) Fipi g is fill 7:cfiling and stress a alysis fsc ::= bors:ed va:er 11:es, Jarvice va:e lines, and c edessato lines have been discussed is Revision 2 of the response 53 Ques:ics 17 a:d in the respcuse
- o Question 19 af de NRC 10 C7?. 30.54(f) reques:. Tigure 50-1 shows the pipe ;rofiles rade by Goldberg-Zoiso-Du==icliff &
Associa:es in 2'. arch and April 1979.
- 2) Due: banks and conduit in fill
- 'eni: rt:g pr: grams for the Seis:ic Categ:ry I due: banks a:d caad"d* ** **11 have been discussed is the respense to :he NRC's Question 12 of the 10 C7150.f4(f) reques:, Revision 1.
S: ess a alysis has been discussed is the respcese to the NRC's Ques: ice 13 of :he ICCTR 50.54(f) request.
1H 7 197 P00R OMNAL
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- 3) Tu:ure settle =e==
Esti=ates of fu:ure sentle=en: dua to sa::le=en: ef fill far
. the u:2dergrou=d u:111:1es is i= progress.
Cuali- r Assursnee and Qualit r Cenerel 'Jork Related :s 71an: Area 7111 A) Rasu=ption of. Q-Lis:ed Zackfill Cpers:1cn Prerequisi:es for the resu=p ics of Q-listed ba4#d" operaci ms here bees =ee. Sese prerequisi:as were dese:1 bed is de st-s 7 report of the July 13, 1979, preset:stien to the NRC (Prese sti n to TAC: 10 C7150.35(e) Zeport, da:ad August 13, 1979). Q-listed ba@" work resu=ed de week of Augus: 6,1979 -is the tank fars area i= side the ring founda:1cn of de pr'-s-/ =22eup va:e: storage ta=k.
- 3) Quality Assura:ce ?:og:ss Related to F=~~d's' *Jork 12 the ?last
- Area Fill
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. Quality Assurance (QA) require =e :s for de desig=, =aterials, ins:allatics, testi=g, excavatic=, concreting, g:cuti=g, and instrume==
=cni criss porti::s of :ha re=edial verk for the a:.xilia.7 budd g elec::1 cal pene::atics areas and fee 6 ater isols:1:n valve pt:s have bees dera-4 ed. Develop .e t of de QA pr:gra:s for de applicable porticas of above 1:e=s is is progress. Also, cci:or-_
ing of fines duri:g local devate:1:3 vill be included is a QA ptugra=, prior :o the start of the pu= ping opera:1:n.
~he QA require =en:s for .he :-='
- g re=edial work for the service water pt. p se:ucture pili =g and the per=sce== plant area deva:ering systes are bei=g as:2hlished.
the QA pregis=, whi..h v111 c=ver :he quali:7 aspec: of the above 1:e=s, vill be established prio: to :he r~ acce=ect of .he activi-ties. Le schedule f or these ac:171:1es is given is Pages la r.=d 15 of this report.
Effect eu P ojee: Schedula ne remedial actions addressed is this report are not as:icipa:ed to cause a del.r/ is the fuel lead or opera:ics of eider unit. nose acti:ns which direc:ly restrain : e ce=ple:1cu of sys:es installa: ices have been scheduled so that no delay is preopera:iccal :esting and startup activices is necessary.
ne re::-.ive =iles:ene schedule for =ajor re=edial acti:ns is as follevs:
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MCAR 24 Interis Report 7 Augus: 17, 1979 Page la A) Diesel Genera:or 3uilii=g a d Tou=da: ions August 15, 1979 Star: preload re= oval October 1, 1979 Star: s:::c:::al c:=pletion a d syste= i s:allation June 1, 1980 Cc=ple:e Usi: 2 diesel ge erator syste=s August 1, 1980 Cc=ple:e Celt 1 diesel generator systa=s
- 3) A"*' d s y 3nd'd' g Ele.ctrical 7enetra:1cs Areas a:d Feed ra:ar Isola:ica 7alve Pi.s
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Ceto:er 1,1979 Scar u:da r*- ' ? opers:ic=
April 1, 1980 Cc=plete ins:alla:ics of caissons May 15, 1980 cc=plete re=edial ecucrete work
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C) Se: rice Water ?u=p S::ue:ure October ,1, 1979 Start piling :es:i=g progra=
Dece:her '.,1979 Star: ins:allation of piles March 1, 1980 Cc=plete re=edisi verk for se: rice water pu=p s::ue:::e ,
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Decc=ber 15, 1979 Start preoperazional testi:g of plant syste=s using Uni: 2 3WST Dece:ber 1979 Perfor: set.le=en: icad tes: of :he Uni: 1 3'.1T through June 1980 Septa =ber 1,1980 star: preopera:icnal :es.1=g of plant syste=s us1=g Uni: 1 3WST Septa =ber 1980 Perfor= see:le=en: Icad :est of the Uni: 2 3WST th cugh March 1931 May 1931 Re: urn :he Uni: 2 3WST for plant s:ar:up l'17 199 P00ROR]NJ1
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MCA1 24 In: :1:s laport 7 August 17, 1979 Page 15 Z) 7erna en: Plan: Oeva:::1=g Systa=
Cc::bar 15,1979 Finali:a desi;: cri: aria Dect=ber 15, 1979 Issue specift:a:1:n zad d:r.ri=gs March 15,1980 , ward subecu:rac: fer 1:s- 2 :10n October 1,1980 3ag1 devataring April 1,1981 Scar: racharge raza :asti=g June 1,198L Place syst e in per=anent cperstic:
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CPC3 Tcts: ?.e s+# ' a presented en pages 14 ani 15 are u .de pi::q e:ctensive re/iew 'ith sc n fate c'.anges pr'5->"Ta.
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