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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)
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Mr.:<Noriail,~c.,.~.l!!os~

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,:*.* *:*, Officie.:' of*.* Insp~ction.. *a:nd Eu:fc:>rcement.*

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

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.Docket.'Nos:~ *s.0~280. * '..,,:.

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

Atlanta, -Georgi.a 30303 '* - :_

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License*. No!!:.- -DPR--~2 *. *:. *

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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 as '.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.

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

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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 cl,<>.sed. * *.. __.::..* ;,- -;:.-* :_. * -. ;-

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. Encioaures

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

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1:1.*: StS.111Ilgs >.

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

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

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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

.003

.001

.006

.001 5

.005

.002

.010

.001 6

.008

.005

.006

.004 7

.002

.003

.001

.001 8

.002

.009

.013

.005 9

.009

.012

.016

.012 10

.001

.004

.006 11

.001

REACTOR CONTA.IN10-ENT UNIT ONE FUEL BUILDING AUXILIARY BUILDING

. SERVICE BUILDING TURBINE BUILDING INTERFACE LOCATIONS REACTOR CONTAINMENT UNIT TWO N

t

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.

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

6.

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

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

ML19098B444

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