ML17252B360

Letter Regarding a Report of Visit to Babcock and Wilcox, Mt. Vernon Works, April 27-28, 1967 to Observe In-Process Vessel Fabrication and Review Process and Inspection Records

ML17252B360
Person / Time
Site:	Dresden
Issue date:	05/15/1967
From:	Lofy R Parameter
To:	Kornblith L US Atomic Energy Commission (AEC)
References
Download: ML17252B360 (10)

Text

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I Par~m_eler, Consulting Engineers Design

• Analysis

• Development 13545 WATERTOWN PLANK ROAD, ELM GROVE, WISCONSIN 53122 786-7580 I ~,

• Mr. L. Kornblith, Jr.

Assistant Directoi for Reactors United States Atomic Energy Commission Division of Compliance Washington, D. Co 20545 May 15, 1967

~

Copy:

Mro G. w. Reinmuth Referenc*e:

Contract No 0 AT(ll... 1 )el658 Corisulting Services Gentlemen:

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Transmitted herewith for your* reference and use are two

• copies of DC-6 °Report of Visit to Babcock and Wilcox, Mt. Vernon Works, April 21... 2a, 1967" by R0 A. Lo:fy, I

','I 9 pages, dated May 13,

• 1967.

RAL:LCC Enclosure

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plant Reinmuth visit *to

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of the AEC the Babcock*

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in.. process vessel fabrication and

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process and inspection records.

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of co~centrati~n was Our principle *... *' rf ~:

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the fabrication of large

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water. reactor. vessels immediate*

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in.the for Dresden vessels II and

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lead*units of this type in.the.B & w Shops,*..

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for. the visit were:.

Contract Co.. ordinator Mr.* E~. Hicks, Babcock and Wilcox,. Boiler Division,,

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the. afternoon. of April 27th,": a tour.was *made* of

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and the main.assembly

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<':\\:c' :'.*:~r*:>ShelLcourses *and heads* for. Dresden II and III and ici, number

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.:... :r stages,of* fabrication.

Electroslag weldin!;J. of longi t~j:nal.r*<*,

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f the assembly bay~ cladding, installation*of nozzles*i*n_* *:.*

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c~urses and"work on' the Dresden II lower head* was:'..,

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progress. ?,\\:A number of 'these *operations on the Dresden:.. ")'..,:\\.. *:;"*,**~',*

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components** were. being *reprocessed as a result of

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I of cladding which failed to meet chemistry require-"

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Thes*~::~ ~epair operations were treat~d in detail. in.* J'>:': ':'*'Li.. ~.. *.'

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'(:~/;::_~; /::'J.)> '*the 'following* days records review and are discussed further:*:*-

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Hl~'%:since the. pre:vio~s inspection of the Mt. Vernon fabricat~on o;(

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she 11 components*. have: been started in the*.:;

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beyond _the.shell or. head* sub-assembly stage_.:*, To* 1'.:: i~'

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no girth. seams *have* been made *rn

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.~.~~'Jj(f(;bppar~ri~1y* be~~ due t~ co~tinued shell.course sfaing *** *. :ti

;::,.\\*'.*~;)<:::,(~::-;.;:.problems (see Appendix. to DCL~3) and poor plate quality~:*

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*:'.;;:.: :, acceptabl.e limits~"*: They are following a triple heat i:._::.::/-

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,i~~~~i'd'} ~ust~~i ti~~,and qUench operations followed by a lower. ' ;t <J,:,.

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at't~rition to: process* *and design deviations experienced-:.. ~:*:* '. "}.: *":.:'- /:~.:,<...':' :-:;

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below code limits.. B, & W proposes to remedy thi~.:

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vess~l. *... While this is an

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• shel_l. shoul~. be *c~~;cked out analyt_i-;'j~. ':*..<**~) }~\\/.*r.*,**,:*:

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ilf~~!l~~~~i!: ;!!,'~:~.. *.*~ :f ee;s.* th~t*:.~he;.,nOw. h~ve th.~i~ **.cladding.p :oc~s 1

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!,.Y:t.,"'::::fj';:l{,';(f;, ~::** /.:under. _control *.. They are using a single wire 'technique... _:-;.:*:.. },_ :'.:.:.*x1 1~~~~h]11f ~iS.: ~t~, l'o~~ \\iy11irlf '..Jt (tie.

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