TXX-1264, Responds to NRC Re Violations Noted in Insp Repts 50-445/75-05 & 50-446/75-05.Corrective Actions:Reactor Cavity Areas Containing Most Damage Removed as Part of Safeguards Bldg Excavation
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........s CASE Exbibit Page p I
Deccaber 22, 1975 i
7:O;-1264 l
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};r. G. L.1:adsen, Chief f
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P.cceter Construction end Operations Branch U, S.1;uclear T.cnu3stery Cor.cission i
Of fice of Inspection 5 Enf orcecent g
613 F. yon Plaz. Dr., Suite 1000 g
ArlinCten, Tm:ss 76102 l
CC:'.A':CIE FEAK STIM: ELECTP.1C STATION i
10SO-E2 2300 l'W I!:ST3LLATION EEACTOR LUILDI!;G D:CAVATION ELi': CC:; TROL 1:0. }:00507T4 TILE };0. 10110 I;;.r 'r IMdren:
In..: cord:nce with the ice,uircrunt, cf 20Cr:OC.% (c)
(".< f. o u r 2, r :. r letto: 4:ted Jun.
4, T:O:-667, to you on 2-4-73) crd ycur sub:ce,ucnt we are submittin; the f ollo..in; description of our invectJr.:. tion 107.k,
and corrective action.
Ac previously reported, hori:ontal f racturcs verc discovered when The crecs e>:covation of Units 1 cnd 2 reactor cavitiec were ccepicted.
centeining the cost da: age vere renoved as p-rt of the saf ecuerd building excavation. The methed of removal cf this rech vos as f ollov::
A n:rreu trench was swn to a depth o! crpro:<inntely 30 inchen, a
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dictence of 10 f eet from the perire:et of the contair.nent The reck between these limits vss rc=oved by using a inrge bachhoc.
The exposed surfar.es were then cleaned and inspected, cnd fractures i :
were found to still exist.
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The second trench was savn a distanc of 20 feet from the perimeter I
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of the contair=ent and the rock removec as above. Inst.: tion 5
revealed to fractures remaining in t.ds section.
iJ The third trench was then cut in the s:ce lecction as step 1 chove
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snd the rock removed. Inspection revened that all horizontal j
f ractures had been removed.
i The rc=oved rock was then repiscec. :..
clined in the pro'ect 4.
specifications, by dental concretc.
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8905040$05 890425 PDR FDIA BAUMAN87-535 PDR I
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CASE Exhibit gy Page $F t:t. C. L. t' dt.cn Lcec.ber 12. 1975 e
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Vertical frcctures ucre : Iso f ound as a restit of the blastings. All the f ractures were tjght and radiate out fret the center of the con-tain ent excavation with the exception of thor.e described belev vhich occurred wher, the s.,fcguard buildings ucre blasted. There are three fractures in Ur.it No. 1.
These f ractures are en the rnuth side nect
- h the north-scuth centerline. They are tangential to the er.cavation, trending to the east f or an undetermined distance er.d were opened approximately 1/8 it.ch. _ Grout pipes were installed in the d, cuts 1 concrete tackfill, Crnut is to be placed af ter placement of Coetsinment No.1 foundation. There in one f racture in Unit No. 2 which is on the north side and runs from the northeast corner of the saf enur.rd building, curv-ing around f rom an casterly trer.d to a southerly trend, intersecting the centsinment excavation near the north-south centerline. This fracture is open 1/S of an inch in the referenced corner and tight at the txcavation intersection. A grout pipe is to be installed and grout placed af ter placement of the Contain=ent No. 2 foundation and the us11c in the No. 2 safeguard building.
Uurerous record phcto;raphs in cddition to detailed geolo,c,1c nors are evcilabic ensite shculd they be required.
As outlined in your June 4, 1975 Ictter, cil blasting operations have been i=plemented within the frcncuork of the pertinent require. tents of Appendix B to 10CTR50.
If we cay provide any additional information, please cdvise.
Very truly yours,
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j l]4 Robert U. Caudie Engineer In Charge R4+
4f RUC/ JH: Jet f
J cc: Director. Office of Inspection and Enforcement, U.S. NEC (15)
Director, Office of }bnagement Information end Program Control, U.S. NRC (1) l 6
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OFFICE MEMO Q
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C. L. Whitford DATE: February 5. 1975 FROM:
P. L. Bussolini
SUBJECT:
Monthly QA/QC Report for Comanche Peak Steam Electric Station Attached is the Comanche Peak Steam Electric Station QA/QC Report for the month of Eggj Please distribute as required by CP-QCP-1, Organiz-ation ano noministration.
F.A / 6 L
Peter L. Sussolin)
Project Quality Assurance Manager
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CASE EXHIBIT
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Texas Utilities Generating Co.
-2 hia rch 6,1975 h
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Pursuant to the provisions of Section 2.201 of the NRC's " Rules of k',
Practice", Part 2, Title 10, Code of Federal Regulations.Section I
- 2. 201 requires you to submit to this office, within 30 days of your C
l receipt of this notice, a written statement or explanation in reply
$3 including: (1) corrective steps which have been taken by you, and the F].
i results achieved; (2) corrective steps which will be taken to avoid further noncompliance; and (3) the date when full compliance will be
$c achieved.
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E In accordance with Section 2.790 of the NRC's " Rules of Practice",
3 Part 2, Title 10, Code of Federal Regulations, a copy of this letter h
and the enclosed inspection report will be placed in the NRC's Public N
Document Room. If the report contains any information that you h
believe to be proprietary, it is necessary that you submit a written h
application to this office / within 20 days of the date of this letter,
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requesting that such information be withheld from public disclosure.
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The application must include a full statement of the reasons why it is M
f claimed that the information is proprietary. The application should 8,
l' be prepared so that any proprietary i:Jormatien identified is contained in an enclosure to th'e application, s'.nce the application without the f
enclosure will also be placed in the 'Public Document Room. If we do q
j not hear from you in this regard within the specified period, the report will be placed in the Public Document Room.
V Should you have any questions concerning this inspection, we will be
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pleased to discuss them with you.
E Sincerely, 5
p.b r G. L. Madsen, Chief Reactor Construction and
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Operations Branch
Enclosure:
IE Inspection Report Nos. 50-445/75-05 L
50-446/75-05 P
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'3OR T No. 50-44 5, ". s.0 5 1E INSPECTION P 50-446/75'-05 DISTRIBUTION:
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[D. Thornburg, IE:HQ (1) i lE:HQ io)
DR Central Files (1) p RS:HQ (3) p, s
L:HQ (13)
TIC y r.e State of Texas Department of Health
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