ML19224A952

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Describes Differences in B&W Piping Arrangements Connecting Pressurizer to Hot Leg.Level Piping May Cause Problem Similar to That at TMI
ML19224A952
Person / Time
Site: Crane 
Issue date: 04/26/1979
From: Plesset M
Advisory Committee on Reactor Safeguards
To:
Advisory Committee on Reactor Safeguards
References
790429, ACRS-M-0014, ACRS-M-14, NUDOCS 7906130274
Download: ML19224A952 (1)


Text

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.'y Jn th; discu:.itui of the loop *: cal i,n the B&W piping arrengement wh:ch connect, the pre,surize r to the h at h Alich. b on pointed out that one had. J oop <.i:ni t t r t o 'n o rdina ry nl:

eter loop (nee sIxet ch 1).

It 10:4 i t, ng l?( d that c ".i raigitt' pi;,e _ era:ection uch at we < aw in the arrtmge-ment f <

Sequo3 A wou!d not give <uch al (see - ' et ch 2).

Fu r t he r, lh. Co n.

1, i s empha si z ed t h e r ole of R.ty)..gh-Ta ylo: irmtability in this p r obl e n,.

'J hei r vie, ir that the nia lo:nete arrannen:ent give< the only stable suppo "t i< > a coh.:pn of, cater in th4 pret eu cizer even \\/ith steam which would c o:c t from a ".' r y " c o r e.

The po:nt that J n.h t o make i: that a pipe fron1 the pre

.n rize r tint la nea rly ]"ve] can give rise to the came p r ob',

the U-tu be a rrangen' ut in Th ree I.lile Inlat.d.

If the pipe of a:

di 'ule.

D rises above the horizenta] bf an angle

-] D ct > tun L

where J, in th-Jeo 'th cf run, then one can get a nei.] on the pre. irizer, it is quit e pm GW, d pending on D and L that c/ could be an angle of on l y c. f e s gree

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061302s Thier Mile h hind Sequc.yah v>it h clight deviation frori, horizontal 179 148

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