ML19312D168

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Final Deficiency Rept Re Use of Incorrect Concrete Mix in Shield Bldg Wall.Matls Engineer Failed to Consult Drawing for Determination of Correct Concrete Mix.Compressive Strength Tests Performed Indicated Acceptability for Use
ML19312D168
Person / Time
Site: Hartsville Tennessee Valley Authority icon.png
Issue date: 03/14/1980
From:
TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML19312D167 List:
References
NUDOCS 8003210376
Download: ML19312D168 (2)


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I a 94 , 2 [3 ;'USE'0FcINCORRECT s [10'CFRIPARTj50.55($)) REPORT CONCRETE ~NO.' 3 f(FINAL)1 MIX IN SHIELD BUILDING WALL

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m M $0nIJunef26,;:1979(TVA notified.NRC-0IE? Inspector, W.;BF Swann, that-the-

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laubject<NCR was/ potentia 11yfreportable'under 10 CFR)Part 50.55(e).;

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iThisfisithe final lreportion the subject NCR.;

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b N '~ _, ,.. i Description of-Deficiencvi -

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LThe 'second 'concreto L pour, vnumber' BlR-2'B,' Jof": the unit;B-1J reactor shield.

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M ,'  : building"from (--): 21'7." i ot ?(-): 11'7";and from 0 to :360. degrees was _

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                         , -                                        _'placed with Tconcrete mix 300;75)BFW-p ^ (3000. psi concrete) rather than-
                             ,L_                                     ,chefrequir'edl mix 1401.5,BF (4000_ psi concrete).

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   -                                                ;               LThe" deficiency wasfdiscovered by the materials en;;ineer who made - . .
                                                                     !the mistakeJ(see cause?of:the deficiency). When'he was.looking back o.ver'
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                                               ,                  cwh_atihad .b'esn ?done,Lh'c foundf that he had specified the wrong: concrete -
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                                                               ':Cause ofJ the Defic'iency
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_ [W/' (The. materials \ engine' e riresponsibledor pour: number BlR-2B 'faile'd to:

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Lfollow?procedureiand{ consult'the applicable' construction. drawing for w.f (determinationfof1the: required _' concrete ~mixtfor that_ pour. Asfa result,

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w che' filled iout 'the pour card for pour BlR- 2B? incorrectly' and the' concrete'~

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Afterfreviewing;the results of the'compressiveistrength_ tests on the

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                                                               .;aamplesltaken[from7this. mix, TVA and GE/C. F. Braun: concur that the
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                                                                    %thiscondition[doesinotipresentasafetyconcern.:                                                                                             ,
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g Q Test;Results and" Corrective-Action-

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