ML19242D124

Forwards Explanation for & Correction of Errors in 790427 Rept Re Reactor Basemat Concrete Rept Forwarded on 790503

ML19242D124
Person / Time
Site:	Wolf Creek
Issue date:	08/09/1979
From:	Koester G KANSAS GAS & ELECTRIC CO.
To:	Vassallo D Office of Nuclear Reactor Regulation
References
NUDOCS 7908140524
Download: ML19242D124 (4)

Text

e p-KANSAS GAS AND ELECTRIC COMPANY G LE P4N L. nO E ST E R WsCE pmEtaOttef OPE RafiOMS August 9, 1979 Mr. Domenic B. Vassallo Acting Director Division of Project Management Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Re: Docket No. STN 50-482 Subj: Investige%ns of 28-Day Base Mat Cylinders a) GLXcaster letter 5/3/79 to RBoyd

Dear Mr. Vassallo:

The PCA Report dated April 27, 1979, which was transmitted to Mr. Roger Boyd with my letter of May 3,1979, contained some minor errors. The attached letter from Mr. J.J. Shideler explains the errors and transmits two (2) corrected pages.

Please insert the two corrected pages into your copy of the April 27, 1979 Report.

Sincerely yours, DC l$

GLK:bb Attach cc: Mr. Karl Seyfrit, Region IV Attach oo(

S2I (

7908140 9 4, u,Ec131 201 N. Market - Wich.ta, Kansas - Mail Address: P. O. Scx 2C8 Wic.Nta, Kansas 67201 - Telephone: Ares Code (316) 2541111

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MdmeDe s i@osatches

'a i WL APC CI'.4ENT ASSCC' AT'ON July 5, 1979 T

Mr. Glenn L. Koester Vice President - Operations Kansas Gas & Electric Company Wichita, Kansas 67201 Re: Wolf Creek Generating Station Reactor Basemat Concrete Our report of April 27, 1979 Mr. Koester:

As discussed with you, the tabulation in the Chemical Services report of April 27 had errors in transcribing the " Combined Water Content" for samples 6483 and 6586. This affected the computed values for Total Water, Approximate W/C and Total Dry Aggregate. Corrections have been made on the attached tabulation.

Also, there was a typographical error in paragraph 2 of the Conclusions of the same report. The number 0.44 should be 0.43. The correction has been made in the attached report.

This does not affect the average or the conclusion.

Sincerely yours, m:^ .,

an)'[ahdu

/ . ~/ ,

n J. J. Shideler, Director Administrative and Technical Services JJS/lg

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E. Hognestad A. A. Alonzo S f'Z :._...

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7 Chemical Services Report Proj ect No.: CT- 04 07 Date: April 27, 1979 Corrected: July 5, 1979 Re: Wolf Creek Generating Station Daniel International Corporation The attached data sheet details the results of tests conducted to determine the cement contents and approximate water-cement ratios of 16 samples of hardened concrete delivered to PCA/CTL on February 27, 1979. The samples were identifisd by K. G. &

E/ Daniel International as remnants of 6"x12" concrete cylinders tested at the age of 28 days and representing the subject con-s tr uc tion ( reac tor basemat) . The test methods employed are identical to those described in our previous repor ts (see PCA reports dated 4/19/78 and 2/27/79) .

Conclusions

1. The cement contents of the 16 samples analyzed range f rom 545 to 59 5 lbs/yd3 The average of these values was 566 lbs/yd3, which is very close to the cement content specified in the concrete mix design (564 lbs/yd3). The anticipated accuracy of the test is

+30 lbs/yd3

2. The approximate water-cement ratio values range from 0.43 to 0.49 with an average value of 0.46. These values are considered to be in good agreement with the value of 0.49 calculated f rom the concrete ndx design.

3. The determined cement content and approximate water-cem ent ratio values are in very good agreement with those previously repor ted. Both sets of data suggest concrete batching procedures were unif orm, h cC[Lt2 6 k u dA L. M. Meyer 6/k) A. A. Alonzo Supervisor, Chemical Services Associate Resear ch CLemist Technical Services Section Technical Services Section L MM/AAA/md CT-04 07 Co py to-J. J. Shideler A c.<l13

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CtMENT CONIENIS i5' PI'ROkIMIlb.lAitR-CLhuri R ATlus COIUECTED VERSION nacr u m p esg W1 c.3

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. 4a . CT-W.07 Completion Date; 4-13-79 c.PNTP m;y t p s*- .

n m.a Test Methat: Sulfur Trioxide (SO3) Hothod Cot. rete L'y l i n le r has 6424 6483 6490_ 6531 6543 6561 6586 6640 6651 6700 6717 6718 6735 6,52 6771 5794 1

Crn. n t C.,u t ma t , lbs/yJ 585 570 5/0 So 565 555 54 5 590 545 595 550 555 575 570 575 550

% SO (oven dry weight 3

basis). 0.33 0.32 0.32 0. 32 0. 32 0.31 0.31 0.33 0.31 0 . 34 0.31 0.31 0.32 0.32 0.32 0.31 IM it t;e i gh t , lbs/tt'-

S . s . D. 145.5 145.1 145.8 144 .2 144.6 146.3 143.4 145.8 143.3 143.1 144 .7 146.0 146.8 145.6 147.0 14.. 3 O/co Dr y (e 105"C) 137.8 137.4 lad.1 1 36 .6 13o.9 138.5 135.8 138.1 135.7 135.5 137.0 138.3 139.0 137.9 139.2 137.6 lit . Water L on t e n t , 1: 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3  %;

( Ed u w, a gh t Lo i s)

Co..as i ae J l1,0 (Jun t e n t , I; 2.5 2.2 2.3 2.6 2.6 2.7 2.3 2.6 2.4 2.4 2.4 2.3 2.2 2.2 2.5 2.4 tosea dry wt. Lasis) 1.,t a l Wates, Ibsf.d , > 30 0 290 295 300 305 310 290 305 295 295 295 295 295 290 335 295 (ts.. watcr 6 c. binto ,

water) ai,c i ox i . ..i t e w/u; 0.45 0.44 0.45 0.46 0.47 0.49 0.46 0.45 0.47 0.43 0.47 0.46 0.45 0.44 0.46 0.4)

O att. ,t. 1 ,e ca y.;r e -

gate abw e i t ion)

(?

. . , imi il .t i f i, cr e, it.,

" 'I lo . / pt ' - 3.,45 2000 10/u A)30 3o35 3v85 10 3) 30/+ 0 3030 2975 3000 30 9') 3095 J070 3J90 3u30

]j (1) t- i.e.t. ia l .i gp . , . t e S0 con te nt s d. Le r mt ned gravinietric lly in Joplicatu (nod i f ic a t ion ut ASIM Cil4). Agrregate bO3 content wa. neglidible.

g Q (2) s.unt :,o s t ou te n t 1. W/ . (average at lype 11 l'ortlanJ <taent samples C-U'l-lb and 17).

( !) ie t .11 2; eg a t e aburptiaa 1.23% (average absorption ot a $U/50 C.A. to F.A. mix with respective absorp t ion v al ue s of 1.81 and 0.7%).

( '. ) Fa. Hju t uo t .. t ot e . 3'. r e pr e s e n t s average v al ue ( s uo n 5.2-5.4%) as detencined on thace r andamly thosen cy li nde r s (Nos. 6490, 6718 aal 6735).