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(y F. Williams
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May 29 1979 J I **
D. S. Vassallo 3
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tiET?.N!T.N FOR: Edward S.'Christenbury, Chief Hearing Counsel. OELD l
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O. 3. Yassallo, Assistant Director for t.ight 'Jater Reactors,
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Division of Project ".anagement i
SUSJECT:
50ARD iOTIFICATIO:1 RECO "1E!iDATIO:1 511DL211D - DIESEL GE' ERATOR BUILDI::G FOU!!DATIGil A*10 ')UALIFICATIOl 0F CO*tPO!!E!!TS (B!i-79-21)
A =acorandu i fror.t 0!1E on P.ay 17, 1979 reccrr. ended that the Midland Soard be notified of (a) fellowup infor..ation on the Diesel Generator Sufiding Founda-tien prelen (S?!-73-27).and (b) 50.55(e) reports on the qualification of com-ponents.
p /> /U The Mid1:nd case is not in the Board llotificatfort ti. frar.e SER Succle-g '3 N r.ent addenssing ACRS concern _s has_nct been issund.
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tion to.the Scard on the roundation problem due to a ea request from OEL3 l
which noted that a prehearing conference was to be held in whic,h that informa-1
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tien could be useful. -
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\\dditicnal reports on that proble(n s
need not be sent to the Board. They have j
been cade aware of the situation and willle provided with the staff assessment in the SER and SER Supplement and then they will autenatically be provided
. with staff correspondence en that subject.
The infor: ration rega' ding the cualification of components does not appear to r
cualify as Ocard notification information regardless of the time fra.me. It Ye; resents a program by the applicant to assure proper qualification of com-pc.ents.
Scard notification would be required if the prcgram indicated that they were unable to prcperly cualify components.
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Light tfater Reactors RICE 84-96 PDR Division of Project Management Encles:re:
As Stated l
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H. Denton V. Stel'lo '
'1. Daer D. !!oed E. Case
- 3. DeYoung O. Parr
- 3. Eisenhut V. Mocre S. Varga
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J. Davis, IE
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MIDLAND QUESTIONA s
D The licensee has, stated that the fill has settled under its own weight. sWhat assurance is previded that the fill has not 1.
N settled locally.'under'
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f the Structures with rigid mat foundations as portions auxiliary building or service water pu=p struct.ure a.
fill resulting in lee.k af ennHminum Class 2 piping in 'the causing additional stress not, accounted for in b.
design)-
suppor How has the lack of compaction and the increase in soil compressibility effected the seismic response esiectra used 2.
in design and tgerefore the soil-structure interaction during
.l seismic loading.
Lf ter current preloading material is renoved will additional borings be taken to ascertain that the material has been 3.
compacted to the original requiremetts set forth in the PSAlt and construction license application?
Since the foundation material is variable as described in 50.55(e) interim report number 4, how car long ve.rm differential settlement 4.
be predicted to assure reliable startup of the D/G in the event
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of emergency What tolerance does the D/G tctnuf acturer require on the alignment of the D/G for reliable oper-tion and startupT 5.
Preliminary information indicates that the piping in fill under and in the vicinity of the D/G buildirs have grosa deforsations 6.
What induced aither prior to or durf r4 we preload program.
Ie hir deformation beyond is the extent of deformation' singtakentocorrect[the predicted If so, what pLs:
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m The borated water storage tanks and diesel fuel oil cdaks have not yet been constructed. and are to be located in questionable 7.
Why'should those Class I structures plant fill of varying' quality.
be constructed prior to usuring the foundation material is capabis of support'ing;such strue.tures for the plant lifsl f
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\\e MIDLAND QUESTIONS 8.
FS Figure 2.5-48 shows estitssted ultimate settlements which indicata a differential settlement across individual mat founcation and.within individual structures. Was this differential accounted "for in the origindi' design of thi mat foundation and in the design tf strucrufe manber within the structure? If not, what affect does this differential settlement have on additional
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str. esses induced in the mat e in structure members such as
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Based on the information provided in CPCo interim report number 4 it appest's that the tests performed on the exploratory borings indicate wil properties that do not meet the original compaction criteria
- set forth in the PSAR and specification for soils work.
What assurance is there that the soil under other Class I structures not accessible to exploratory boring meet ther control compaction requirementeI
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' I-Do NOT use this form as a RECORD of approvals, concurrences.
disapproaals, clearances, and similar acticos
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,i ENCLOSURE 2
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ATTENDEES J. Knight D. Skovholt s
W. Haass D. Vassallo S. Varga.
L. Rubenstein D. Hood H. Thornburg R. Shewmaker R. Backman W. Omstead R. Lieberman J. Gilray J. Spraul i
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