ML19098B444

Provide Requested Information Relative to Site Settlement to Close Previously Unresolved Item Identified as 76-15/1, Site Settlement Surveillance

ML19098B444
Person / Time
Site:	Surry
Issue date:	06/28/1977
From:	Stallings C Virginia Electric & Power Co (VEPCO)
To:	Moseley N NRC/RGN-II
References
Serial No. 264
Download: ML19098B444 (4)

Text

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_.. *Mr .:<Noriail,~c.,.~.l!!os~ley ;'.i*Di~~ci~r. - - . .;* ... seriaLNo~ 264_* :

• ,:*.* *:* , Officie.:' of*.* Insp~ction . *a:nd Eu:fc:>rcement.* <_.p:o~M/~AB:daa *_* / .*... * ** * *

. * '_ . U. s:.*)Juclear Regulatory* *com;niss:Lori\ * .Docket.'Nos:~ *s.0~280. * '..,,: .

Region:*. II* . :. Stiit:'e: 818*: .;.i/ .- i, _:; ._; . *..- s_o..:.2a1 *

• 230 Peachtree Str~et,, Northwest"_*':*-.. : **.

• License*. No!!:.- -DPR--~2 *. *:. *

• Atlanta, -Georgi.a 30303 '* - :_ . -* *. .... *. ~-- *. -,DPR;.;37 *

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. .- _* In' res.pqnsfi(to*: a r~~~-~st* f:fom Yo~i"*:-~ffi~-~-,--_the f~lio~in:g *infcirJ;llation:

., r~la_tive to* s~te: settlem~nt;*at. Surry.;i'o~er* :Station* is pr~aentecl to a'.lose* .. -.. .

• • . the previoueiy*unre'.sQlve,fitem.Oident:f.fied '.76;.;iS/1; *site**settlement '*sur*:

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. ihe *~r:(g{ri~J. ,* ~~Ilc.eiri' :~~i;*. '.:~it~: *-~~ttlem~Jt/~~S-_ p~sld:--~P~Jl' tlie :;~sult~. *. *_.

'*of .surveys.take11* in february;'l971-:and-:Apr:f.LJ972~*-* The!~e-- *surveys w~re later*

.. determined' to' be.* in_ error '.d1i'3- .to. the* -~~spl~c~~ht .of the:' r:ef'erenc~- bench .* .**

• *mark (vain) * , A **survey: usinii° 'a* more<accura.te *reference was c~i:lducted .in* . . .

.*. May-1975~- * ::The-results -of*;this:sµ~ey**deterini-0:1ad'..that'settlement* ~a~, not a*.**_,

• .. prdb:lemi*at :the" Sµrry :site., "A:* s4rvey'. progr~- wa$ e.stab1ished - ~v_er -,the'. sub-<

sequent'* two year *period -to*. ~on_itpr s:ite ¢1.eyaticni_s. *,-: ,The, re'sults* :_o:f;- -these: .. -

surveys - have. indi~ated* -that': a --*small_ amout;it :of hea_ve .has 'beeI1 exper:Le11ced in- the :Vicinity :of .botl:(cont<'linment. structtiree/:-_:However-*;.:of :importiuice. I

' . *ia 'the_ diff~retitialmovetnent: -betweert'. . saf~ty related* strticturee. 'Tlie. ~llqw- ..

able'*tolera:rice* of ',this movemen:t:'is. o~s::-:1.n**. -(*~042 ;f"t~) ;<>yet;. as* 1:1hQ~ in '-.. ,: .

• Table l ,' sin,ce: tlle *:iii~t::tal. sirvey'. in ::'the: p:i-e~ent program, the* '.max:i.lnum dif..:.:. - '*

fereritial mov~ent)haa been apprQx~ate,ly o_-.2 *iti,/(.016 ft.);: well.within> .

• p_ermissibie liiil:i.~s ._: 'Ac1clitiorially ~:*.1nspections."_:of strud:ure* *1tlt.er:f~ces re-:_**..

ve.~led' no*visible *ev;Lde~ce:*_~f. differentiaf diaplacemexits~:.

.. . .C~eref~r'e~ *.ba~ed upo~;ihe* r~l:~bl~-*-dar~*:e~k~n ~~ 'th~ tNrtr~i11anci~- pro- * -*

. gram a~d--:°th_El,vi.st.ui,Lit?-.~P~Cti_on.,.-lleit)ier d;Lffereritial- heave !Jr- aettlement*are

. :p;robl~s at Surry Power.:'stati,.on. -. llen~e*,* :um:est;>i,red item 76;.;.15/1"_-.should :l)e :.

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--.:* Vice: Presid,~11t::..Power: Supply*. -  :. ~

<','.*.'etid*Production Operations., .

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.** .*. ci:: Mr; .* llobert w, Reid, Operating Reactors c~:~ ;/ i <i Branch.4 ' ....  ; .

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TABLE 1 DIFFERENTIAL MOVEMENT (ft.) '

Survey 1 Survey 2 Survey 3 Survey 4 Interface 11-10-75

• 5-20-76 1-10-77 5-26-77 1 .005 .004 .005 .001 2 .006 .001 .004 .003 3 ,004 .003 .002 .001 4

5 6

.003

.005

.008

.001

.002

.005

.006

.010

.006

.001

.001

.004 7 .002 .003 .001 .001 8 .002 .009 .013 .005 9 .009 .012 .016 .012 10 .001 .004 .004 .006 11 .001 .001 .001 .001

N REACTOR CONTA.IN10-ENT UNIT ONE FUEL BUILDING AUXILIARY REACTOR CONTAINMENT UNIT TWO t

BUILDING

. SERVICE BUILDING TURBINE BUILDING INTERFACE LOCATIONS

INTERFACE DESIGNATIONS

1. N/W Corner Auxiliary Building/ S/E Side Unit #1 Cable Vault

2. S Side Unit #1 Containment/ S/W Corner Unit #1 Aux. Feed Pump Room

3. N/W Side Unit #1 Containment Spray Pump Room/ S/W Side Unit #1 Safeguards Valve Pit

4. N/E Corner Unit #1 Safeguards Valve Pit/ W Side Unit #1.Containment 5.

6.

N/E Side Unit #1 Containment/ N/W Corner Fuel Building N/E Corner Fuel Building/ N/W Side Unit #2 Containment e

7. S/E Corner Unit #2 Containment/ N/E Corner Unit #2 Containment Spray Pump Room

8. S/E Corner Unit #2 Aux. Feed Pump Room/ S Side Unit #2 Containment

9. N Side Service Building/ S Side Unit #2 Containment

10. S/W.Corner Unit #2 Cable Vault/ N/E Corner Auxiliary Building

11. N Side Service Building/ S/E Corner Auxiliary Building