ML102910726
| ML102910726 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 11/30/2009 |
| From: | Williams C Progress Energy Co |
| To: | Robert Carrion, Lake L, Naus D, Thomas A NRC/RGN-II, Oak Ridge |
| References | |
| FOIA/PA-2010-0116 | |
| Download: ML102910726 (11) | |
Text
Senguipta, Abhijit From: Williams, Charles R. [Charles.Williams@pgnmail.com]
Sent: Monday, November 30, 2009 1:00 PM To: Lake, Louis; Thomas, George; nausdj@ornl.gov; Carrion, Robert
Subject:
Prelim Refute 2.4 Document for Review Attachments: FM 2.4.pptx; Pour743RBElev240-daily concrete curing and form removal.pdf; Pour362RB-concrete curing log.pdf; Pour362RB-daily concrete curing and form removal.pdf; Pour522RBElev98-concrete curing log.pdf; Pour522RBElev98-curing and form removal record.pdf; Pour528RBElevl03-daily concrete curing and form removal.pdf; Pour642RB-concrete curing log.pdf; Pour642RB-curing and form removal record.pdf; Pour743RBElev240-concrete curing log.pdf; Fc over time butt 3-4.pdf; Fc develop butt 1-6.pdf; Fc develop butt 3-4.pdf; Fc over time butt 1-6.pdf i ,-, .
Mr Lake and others, Draft refute document 2.4 for your review.
If you have questions, please contact me.
Charles Williams 919-516-7417 1
214-7
A 2.4 Inadequate control of early age cracking
==
Description:==
Early age cracking can occur when concrete is exposed to stresses exceeding its capacity before itmatured and gained strength. These cracks are usually the result of early, excessive drying shrinkage. They may also occur when forms and supports are removed too early and excessive loads are imposed on the structure before the concrete reached its design strength.
These cracks can extend the full depth of the element and lead to early failure from strength loss and/or durability related distress.
Data to be collected and Analyzed:
- 1. Review reports from original construction regarding curing and form removal procedures. (FM 2.4 Exhibit 1)
- 2. Inspect for visible cracks inthe SGR hole cut zone.
- 3. Review strength development of original concrete. (FM 2.4 Exhibit 2)
Verified Refuting Evidence: Verified Supporting Evidence:
a) There are no reports or NCRs addressing early age cracking of the containment structure. Not applicable b) Records of construction methodology, and especially curing and form stripping records, indicate that the concrete was not exposed or allowed to dry for at least seven (7) days after pouring as recommended by concrete industry standards. (FM 2.4 Exhibit 1) c) Form stripping records show that the concrete was supported for at least seven days, at which time it reached 70-80% of measured 28 day strength. (FM 2.4 Exhibit 2)
==
Conclusion:==
Adequate steps to prevent early age cracking were taken.
Reviewed by" Dr. Avi Mor, 352-795-6486, ext 1030- PII CR3 Team Office evidence.
May identify additional perspective on this issue as RCA related efforts proceeds DJIOR~
3/19/2010 1 Dv iil ettea to third poa without permission
I p FM 2.4, xhibit 1, pg8of9 PITTSBURGH TESTING LABORATORY Uela P-3)
PITTSBURGH. PA.
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.51*U,4L¶( S I.L COW&* Ds...P- 0- 0 t.- C C1_' .n i'.0 Zc O>VM RIPO.TS S* P(*LL-.tt z f * . 0. .. Vf1191. A Order No. TA-7732 DAILY CONCRETE CURING & FORM REMOVAL RECORD REPORTED TO: FLORIDA POWER CORP.
PROJECT: CRYSTAL RIVER PLANT UNIT NO. 3 Co*rete Suppliew: West Coost Concrete, Inc.
Am&Eogineets: Gilbert Assoc., Inc.
A4064e Gaeuwl Controctor: J. A. Jones Date of Pour: 32 7 Locationi: PU:V3* ~ ~ of 1 Comreete Design Reqd. ,, - PSI @29 C.ýs - Type of Cement Ji Time of Placement: Begin 2-20 1M _End . 27:3. .
Service Category: No. Load 0 Partial Load 0 St uct. FI I Load M TEMPERATURE DATA 'F. Inspector:
C.R IF Actual I A MB IE NT i AS PLACED I Spec.
70T 1.1aim~um If CURING PROCEDURE Continuous sprinkling and ponding CURING DATA flor iboI oate I 22 j 23 1 24 25 272 25 29 Requirement 7 Days at 50 Decrees M.inimum Actual: 8 dAvs. 15 brs.
FORM REMOVAL Q Field Cured Concrete Cylinders Requested WIN. STRENGTH MIE.* FILE R S2RUCT. CLASSIFICATION REOT. P.S.I. PERIOD *ZU1 IN IR CINDER 3000 PSI ALTERNATE DAYS I I P.S.I.
Sides of Footing. VWalls 503 1 Sides of Bearts. Girders, Columns 1500 3 Forms under Floor SlaGs &0, 07 70 i Corntering une Beams. Girdes & *.00 21 1 1 Flat Stab ; 1 Sec. Strength _ PSI for Removal of t 0 ,-, or Shore or Days Spec. 1 Da.e Removed. aA of 3_-3. -7 not oved S :-cred r.-s _ i
- Sawe minimun period in days __ Correlation fc<: 5[X' P.S. . Ccorere 0 Indicates uIlkhead removed aftert XA rs. Cr..rong and cu*,-g cvninuel.
E)th.cates curing confownd to project spciufications.
CC: 2 -JAJ Quality Control 7.-IMGLAB
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FM 2.4, Exhibit 1, pg 1 of 9 FLORIDA POWER CORPORATION J. A. J ONES, CONSTRUCTION COMPANY CRYSTAL RIVER UNIT #3 4
CONCRETE CURING LOG Pour No. Pour Date, 1Lia.
Pour Name . I I III Type of Curing
,.,2-- 1g-
!*1 Duration of Curing "ký-AY s - -
Date Curing Complete 2. 'Fro rI?
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F. P. C. Quality Engr.
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.. .FM 2.4, Exhibit 1, pg 2 of 9
, PITTSBUM4H STINGForm TESTING LABOF~RORY FP-3 ESTABLISHED
- .;13" FOR PUBICATION PITTSBURGH, PA. Report R"
No.__________
- AS A MUTUAL PROTECTION TO CLIENTS. THE PUBLIC AND OURSELVES. ALL REPORTS ARE SU9MI11'ED AS THE CONFIDENTIAL PROPERTY OF CLIENTS. AND AUTHORIZATION
- FOR PUBLICATION OF STATEMENTS* CONCLUSIONS OR EXTRACTS FROM OR RKGARDING OUR REPORTS IS RESERVED PENOIN, OUR WRITTEN APPROVAL, Order No. TA-7732
,.DAILY CONCRETE CURING & FORM REMOVAL RECORD REPORTED TO: FLORIDA POWER CORP.
PROJECT:- CRYSTAL RIVER PLANT UNIT NO. 3 Concrete Supplier: West Coast Concrete, Inc.
Arch-Engineer: Gilbert Assoc., Inc.
i General Contractor: J. A. Jones Date of Pour: 1-26-72 Location: Pour 362 RB Concrete Design Reqd. 5000 PSI @ 28 Days -Type of Cement .- ,
Time of Placement: Begin 1:20 P.M. End 4:35 P.M.
Service Category: No. Load [ Partial Load E] Struct. Full Load []
TEMPERATURE DATA -F. .
V7"7AMBIENT AS PLACED Actual 78- 82 '64-68 Spee /-70'F. Maximum CURING PROCEDURE Cont. sprinkltng and ponding CURING DATA Date 1..-27 1-28 I 1-29 1-30 1 1-31 2-1 2-2 I Time _JQ..1:.0_ _oo _:0 1., . :&L-0 "
Amb. Temp. 'F. 55 60 +57 1 59 l53 52 50 Requirement 7 Days at 50 Degrees Minimum Actual:
FORM REMOVAL C] Field Cured Concrete Cylinders Requested MIN. STRENGTH MIN. CYLINDER FIELD STRUCT. CLASSIFICATION REOT. P.S.I. PERIOD CYLINDER 3000 PSI ALTERNATE DAYS NUMBER P.S.I.
Sides of Footing, Walls 500 1 Sides of Beams, Girders, Columns 1500 3 Forms under Floor Slabs .2000 7 Centering under Beams, Girders & .2500 .10 Flat Slab Spec. Strength 5000 'PSI for Removal .of Form or Shore or Days Spec. 1 Date Removed As of 2/2/72 not removed Days Supported
- Same minimum period, in days - Correlation for 5000 P.S.I. Concrete Indicates Bulkhead removed after - hrs.-curing and curing continued.
Indicates curing coglrormed to project specifQations.,
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&WRIDA POWER CORPORA*N
- 1. A. JONES CONSTRUCTION COMPANY CRYSTAL RIVER UNIT #3 CONCRETE CURING LOG Pour No. - - - Pour Date * ,1Z.
Pour Name -A-.'O,, - ,,- , -
Type of Curing
_z Zf Duration of Curing ~~A~1S Date Curing Complete Z(0 Whi^- F.P.C. Quality Engr.
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_FM 2.4, Exhibit 1,pg 4 of 9 PITTSBURGH TESTING LABORATORY frorm FP-3 EST ASL_
4- LU Idol PITTSBURGH, PA.
AS A MUTUAL PFOILCTIOF TO CL'r*1.,. PUSLIC AMO OuRsrLvtS, ALL EIPORrT Report No.__
OFp CIJ-SrS. AN AL RUTPORZATIS ARM SURMI 1?10 AS THE CONFmDrNniAL PwOPERyv IFrP.LICATIO1 OR STATFMIFITS CONCLUSItUNS OR ENTITACTS FROM OR REGARDING OUR RLPOH*7 IS M*iALRVFD PNMONG "UR WRITTEN APPROVAL Order No. TA-7732 DAILY CONCRETE CURING & FORM REMOVAL RECORD
- ':,EPORTEDTO: FLORIDA POWER CORP.
"*>ROJECT: CRYSTAL RIVER PLANT UNIT NO. 3
- .*-ýzoncrete Supplier: West Coast Concrete, Inc.
i.Arch.Engineer: Gilbert Assoc., Inc.
-aeneral Contractor: J. A. Jones
>ate of Pour: 7-19-72 Location: IQoZ9.22P.
- oncrete Design Reqd. __.Q00 PSI @ 28 Days - Type of Cement IT 7Time of Placemesit: Begin 9:43 AII End_ 2t15 1
_Service Category: No. Load [] Partial Load [M Struct. Full Load K)1 TEMPERATURE DATA OF.
AMBIENT AS PLACED Actual 79 - 89 59 - 67 Spec.
70'F. Maximum CURING PROCEDURE Cowt. sprinklin_ and pondng CURING DATA Date 7-20 7-21 7-22j 7-23 7-24 I 7-25 1 7-26 1 ' 4*'
L Time I I I I I i Amb. Temp. -F.
Requirement n 7. _L_...s L27-. 72 7 Days at 50 Degrees Minimum 75 173 Actual:
I Lrn j FORM REMOVAL
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- Field Cured Concrete Cylinders Requested MIN. STRENGTH MIN.*
STRUCT. CLASSIFICATION REOT. P.S.I. PERIOC 3000 PSI ALTERNATE DAYS Sides of Footing, Walls 500 1 Sides of Beams, Girders, Columns 1500 3 I-Forms under Floor Slabs 2000 7 Centering under Beams, Girders & 2500 10 Flat SLab -I Spec. Strength 5000 PSI for Removal of Form or Shore or Days Spec.
Date Removed As of 7-26-72 not removed Days Supported,
- tSame minimum period in days _ Correlation for 5000 P.S.I. Concrete =,t Lii -.. *t.
- I.ndicates Buftead removed af t .*- hrs. curing and curing continued.
Indicates curing conformed, 16praocf s-"Iications
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"wasewg I ow0~6 e06 £Z7*67 W"M 06A4=~ OL E DAILY CONCRETE CURING & FORM REMOVAL RECORD REPORTED TO: FLORIDA POWER CORP.
PROJECT: CRYSTAL RIVER PLANT UNIT NO. 3 Caseo* Supplier:. West Coast Cemm"., Imc.
Andl-agnoeew: Gith.. Assc., Inc.
.meeI Co : J. A. Jewes Dam ot Pown: 3--7 ~t NE~R fl91 I
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NJ".POU2 NR 011 bft I Pv I CmArwrte Design Reqd. .0 PSI e 23 Days-I Tpe d od CommaIt'lKIq L Twt of PNacemen. Begin Saivice Category: No. Load Q Psnial Load 0 Swum. Full ad M~
. EWERAIURE DATA *F. -3A AMBIENT ASPLACID -
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Dearees Vinimum ActmaI:
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FORM REMOVAL Q Field Cured Concrete Cvlinder Requested 1laces of.Footing, V~asis IFoa l
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- - DAILY CONCRETE CURING & FORM REMOVAL RECORD PRTrED TO: FLORIDA POWER CORP.
PIMNCT: CRYSTAL RIVER PLA1Y UNIT NO. 3 0, West Coast Cgmem , ka.
A-.&ag.'.' Gliae Assoc.. le.
m.em; CFoau6e: J. A. Jeme om o ftu 3-6-73 vm*lfl2 em1 1% vh I o ion:
Cmwmt Desaio RiW. 5ooo PS. 02 Devs-TvMt COM Tihw oe Placemet Began E A*
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Sonso Footang. ý.& is oiaa Beams. Girder. omj IFe rmsa Fioct wacs i ~ -
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Aimak FL 0 A P 0 W E R CORPORATION Exhibit 1, pg 5 of 9 J. A. JONES CONSTRUCTION COMPANY FM 2.4, r'DVITAI DII Ii
- 1 '..niI~.L IIV IN UIl 11'J 3
[CONCRETE CURING LOG]
I POUR NO. 64-. - POUR DATE .-AEC 7e ýA POUR NAME 5 I~ //d54At.Z, / 2 2*7"
.
TYPE OF CURING
- DURATION OF CURING Io PA ys a DATE CURING COMPLETE z% rx?-Z Signature Date CURING FOREMAN _____ ________
QUALITY CONTRO*
White F.P.C. Quality Engr.
Yellow:, J.A.Jones Field Engr.
Pink F.P.C. Structural Supv* Form No. FPC Q-62 77-7,7'-7-7 'W";
F.M. 12.4, Exhibit 2, pg 4 of 4 .1 ~ ~~~~Exhibit:
__________
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