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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
Issue date:	03/14/1980
From:	; TENNESSEE VALLEY AUTHORITY
To:	;
Shared Package
ML19312D167	List: ML19312D166; ML19312D168;
References
	NUDOCS 8003210376
	Download: ML19312D168 (2)
	v • d • e

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

M t _'placed with Tconcrete mix 300;75)BFW-p ^ (3000. psi concrete) rather than- ,L_ ,chefrequir'edl mix 1401.5,BF (4000_ psi concrete). r m-s s. LThe" deficiency wasfdiscovered by the materials en;;ineer who made -.. F' !the mistakeJ(see cause?of:the deficiency). When'he was.looking back o.ver' (. cwh_atihad.b'esn ?done,Lh'c foundf that he had specified the wrong: concrete - ~ -, imix 'on;: thel pour-card for (that; pour. - c ':Cause ofJ the Defic'iency (The. materials \\ engine' riresponsibledor pour: number BlR-2B 'faile'd to: [W/' e Lfollow?procedureiand{ consult'the applicable' construction. drawing for w.f (determinationfof1the: required _' concrete ~mixtfor that_ pour. Asfa result, w che' filled iout 'the pour card for pour BlR-2B? incorrectly' and the' concrete'~ 't (was.placed according to,.otherwise; proper procedures.1 q V - ' ~ .,. m ? Safety-Implications-

,n-fg Afterfreviewing;the results of the'compressiveistrength_ tests on the 7 Q

.;aamplesltaken[from7this. mix, TVA and GE/C. F. Braun: concur that the , ; concrete:in" pour number BlR-2B is acceptable for use. Therefore, i i %thiscondition[doesinotipresentasafetyconcern.: s .a .... 1 Q Test;Results and" Corrective-Action-g

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ML19312D168

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