ML20024B472

Discusses Disign of Pressurizer Safety Valves.Recommends That PORV Be Eliminated from Valve Arrangement.Unlikely That Safety Valves Will Be Required to Lift

ML20024B472
Person / Time
Site:	Crane
Issue date:	06/22/1967
From:	Butt W BABCOCK & WILCOX CO.
To:	BABCOCK & WILCOX CO.
References
TASK-06, TASK-6, TASK-GB GPU-0267, GPU-267, NUDOCS 8307080795
Download: ML20024B472 (8)

Text

____

s a

• t

'l i*

l 1

t 1

i

.... ~ -- -

--..+-a*

5 Ti."i FAD M & W.t.COX Cot.7t/ "

EC';.EA DN"l.X:A 0

0[

!j i?

wR. M. F. IXP!2,, 3t'"?ltP? MMACEt, 5iums_172c110 N

r

w. C. htlTT, r!DTD SY. ann 13 1

4 1

Case.

i DJT.T PGtt1t COtPMT s"Iis Ms. 12ES.#

1

{

or !!ef, ePla1.2 i

N e

PRT53E2IZ p TAZ,TES o.i.

g n he.e.. jDt j

e

.w 4 June 27,1967 REPS a)

Meme free J. D. Carlton to D. W. mmtgesery dated Nerecer r

ri r.satet,va - si.a., rue, u s,.

23,19663 sutject,

{

b) Mene free J. D. Car 1teri to J. E. Taylor dated March 3,1%7; subject, Pres-

)

seriser Trmalaat R-atwat; File,1257.

i i

t The pint sanditions requiring safety volwa to powent reacter coolant systa= ever presasaw ares l'

6, 1) 1 Ned witharaval mecident at low power P

2) Tunine trip witbe:tt Master rente= 1 acties I,

4 n ma,i,t - a.us t.--

or. tor.r tre.e 7,t I

r The pressariser safety valve capacity was detemined to be 6CO,CCO #/'Ifr bened as the f.

rad withdrawal accident as described is referuneo (a) and (b).

I t

The proposal sadicates that the pressurisme will have taso ocaventional safety valves P

y g

l a.nd one p120t epwrated valve. The standard festificatica *cr using a pilot soarsted t

valve is to prevent lift of tae eenvaertional safety valve setiett 1. mero 11k2*q to Isair f

t rolicadag a list.

t i

I Based en the criteria used to establials the safety valvo capaciey, est for t*nat osatter I

that tha safety valves will be resp. ired te lifts tbtreforethe need for safety valv i

p,or.t.d,e.o

.las 4 tr in.,ar. arr

,.t.it is rea=====**d that the 1

f t

y r.,,,

t. -w r,,re e.Za any event si evalmstian af possible vendars and valve arrancemarte

[

1 i

iscarop

}

}

97Ab d-

. cr.n r11.

em72 r h

I i

G-Pu e

Det Exh. For m M McEmih:indy -

l Charles Shapiro CS Dovfm R r.-'-..' R @ j f S ( g wn%

t 's-8307080795 670622 g

PDR ADOCK 05000289 B18141 A

HOL

-1_ _

pn

-hecem gg 8--

^

W w eg, -

'c--em--7N-g w- - - - - - -

wyy--,y--9%wg-t-

--wr--gwi--

--'e-r---

--*w yim--g-ww**'ee+w-wmmt*=wew+=--,wrut-,m u--mm-1

,+-----

--+-ae--*w7-"

-"7Y-w v

--'#m'-1r'-

4 ymcr i

I il

..... ~.

I

... -- -._ ~........_..-.

3

,i ric.vior a cuorcre:O

• 1 O

_s r

i 2a resp== to ow rw.ust rar qwustaa suentu.4 to una mer, eaxy twe ans.i 4

t j:

mitS** Sie-Nw ve= tare, h van east and stem isy, are tenlated belo 1

]

w.

Pendar Jalve ca ness,

t

_cet. c t c;

cu a si;. a s tr m ase oco In I M I,, coo n,h t

$6,16 M 5 a/a 7,6:6.rI.

1 M2 dCD""***

Jn,733 2bs/mi 5,3ao.co t

r m asr-acez 3co eco,, coo m/mi la cos.co cos m/m a,oco.co comms m cum-asert crorr 1

s (1), set u. ernt be portarne.a essa Ico psig steam with a prerated spring en the e

,as.. aa u.t ua

= or pe,.a, sea, 61

.ee.t t.

I a.4,,r r

=,re ro es u

. o.r. peer u.u reir i

a j

sesta se be partensed at 2,500 pes a 670*r.

i e

(2) Act pressers will be set osing 2,50o psig air.

I 4

U (3)' Seat lankage test to be performed at lo per cent he2aw set pressure J

[

l I

i

{

2

.Asas.

s at l

[

Tigitaeas errared is as ar.a142m er viana leakage at 3D per eent bo set pressure. Car aquesifisetion esiries a sezimumi lankagge af 20 os/85/ia f

'l-g saa dimeter at 1) times design prwsuure.

j Qi) se gamatity dLeesamt is sites rer either das of,alvv.

1

($) De valves psspea.d have been certiftad under Sestam III, Artiale 9 i

cocGPTS m StEVJt (CCM5tETP.cc) C00fE t

m o

ru1..eeus. m,. rue... -

o m

.e. s e.6 4. a e4 6 et.4 ken e 9,. wave r-se.u. m.-,ae.

i 4

j i

.se,

v a = witt n. n. u t. a rs. a. -

e2.,se r.,a = u. r 4 s i

i 1

l e

tian VIII valves.

cm) n.,ru. qie u s.

. -4 < - e e1.,c,s..

i

<t ecoms a woeaa r c==

I 1

1 (1) The valvo proposad by 7 4 le. pilot operated ' valve, De fisw path thrwingh

.j 1

B18142 i

1 i

,-. ~.

-^

]

.. := = --- -

I i-4 j

.t 1

j, I

I i

O O

t i

8 f

the valw is the rwesmo of %as taand la conymtianal valves. The steam inist

}

is is she side of the valw with line presaarv tendi=c to held the valvc slast.

I e

{

The discharge par be ftarnished with the entlet econectico en the side er bottas.

8 s

I (r) T4 has never furnished a valve for A343: Cesis appliastime. Most valves f1:r::ished 1 to date have been for saml arphuum.

i

~(3) T4 elaas to have A*Gl Seetles III sortification of their valve desiEn this fall.

i l

They are presently fabrisating a safety valve far the stillatae Statiam ehich u111 kr.re as9asity of SCO,C00 3@. Sehemlad deliwry of this valve le h 1967.

L (is) T4 is present2p mbaitting test valas to the Estianal Board of Beilar ad i

5[

prosaur. ve 1 I.,ecue far mea sortists.ua..

l (5) Quantity discoussa of f]s,000 per valve are e, net ki-en the T4 valves. T4 f

has indiekted that they mar reense the prias of their valves, but ther don't

[

.b nues how mush.

t 3

E (6) sostion III, Artis1e p requires.thst this type of valve he -~t-; -' with a

(

1 emustism.a.s monitor to detoot bellave failure.

s I I I

a T

sirtry vcvs m?>.t yzg?

s l

g

]

Several passible estety valve arraigusente a:e ebene en Figure 1. The oest malysis

[

.1 af eask arreneessas is gives in Tabla 1.

i H

The fasters ocasidered la evaluating each arrancenset are as folleust i

1) Festarwa insorporated in the arrmesment to permit maintamanee marias i

aparation er while systaus is pressurised.

2) Ability to consismse operaties with a cafootive safety valve. (Laaky s a t, 7

?

eracked bellove) 1

-l B18143 1

-.v : -

__._w.-

... ~

=

i

.i~~~.....-...

w A --

^ * ' - -"-

e';

1 0

0 I

'6 l

)

3) )%sturee that would permit isolatias of stock setety valtw following 11f5 i

1 to prwoest systen blandown.

i o l j 1

A.

ii

(

b) System flazihility fe the aces savolved.

';i 1

Arrierement =e_

fI

!4 I

'this arrsvignesnt is svuilable with the Targwn.aeet valve er.27 mines it ia the an2y

^[

s.

s l

2h11 saposity valve ava11ahle. Since the Cada requirse a bel 2nws integrity somitse'

l 4

r j

es taka T.4 valve, it would be nessesary to abet the plast doun in'the eveet af a be1.

i l, '

1 1

f=nm.: ther rar, tai. a%=t as cet ate r.e anuafactary.

1 arras.=a m t ar*

I

l. 'I The TarCot asek valve is act acce= tab 2a fe this arrer.gesamt fes* the reessa stated l

i i,

abase.

This arraeguesat does act have a=y previaises for valve maintamasse with the 4

s ;

gretas pr.saarised er mesas for isolati= a 2aaung er esack vales.

i..

In vsar of the diastility to perform maintenames during operation 1.his arrangement is set, oemaicared assistaster.

II p g

(

a.

^

r m 'c=

7

{

1 This arragsmaet is ars124hla with the Tarp valvo en2p mines it la the caly j

fall sapacity valve av="M=.

This arrangensat puweicas esaplete fi=.4Musy ce

{le 5

eastianed plant cperstico with see valso an a stand, ty states cr ie=*-d stu scia I

tenames. She21d the a ce-lino

• valve lift and stiek apan er fail to reseat preactly, i

16 samla be quickly and eas127 iselstad to prevent assassive system M*

i

{*

i

,i Arveeruneet P j

2his asig---t prweidea fe sentissed slaat aperd$ee with see of maak pair et I

r1 i

valves en a staid.by states er teolated for asistenance. This arreirusent weald t

,i require a rather samplicated header arrantveint that eenld inessase the eset af

}

1 ts. arre.ic ui itsy

-d se arr

-t.e ar. c.

u I

>4 g

l B18144 z

}

1 s

.... -. ~. -..

e I

t i.

..-....-r4:..~...~.....~

. ;. ~ a.

--r: _'

- ^ ^ ^ = -

E I

J-

.j j

j o

4-o

_Artwn w tnt *Eu k

This type af arrangement sinquiMs sa 1sterless' em the step valves operstars te provmt

{

{

i i

[

l iaalstlen cf aere than one safety valve at a time.

i There are as prwytrions for statar.

I j !

adaing which valve has stack follouin6 a lift, and eccooquant2p, the syste sould bloo.

i 4

esen before themfective valve esaid be isolated. This arrancommet has a scoplisstad i

e i

bandar ths.t smile lacrease the cost af arrangement si nificantly as aceposed to arrmge-C aunt *A* thru *C".

1 1

a A. _ ___.^. *F*

i i

IIsis atver.Cr. mar.* is a modificatism af arrangummit "C" which replanes the ft11 sapasity 8

valm eith too balf es acity valves.

i The operstimal features are the same as arrance-most "Co.

The header errsagesset coc3d be easily strean2.iaod without canessive east.

s I

,1 M*=ed as the fasters abere, arrangement *F" is the r=" arrangsmuut.

,I The g

arrangsamat with stee valves, se shaus, is pesuitted by Section III of Coom whiah i

l roads as follave:

4-930.7 ithile pressere reliering M mood not be installad stLrectly en the vessela shish they serve to protest, no step valve au aia11ar devien shall be olamed st1stive to a preteetive devise required far the erstectie af asqr vossal se that

.I it, eenld recove the protection affares to the essoal, sasept shuse sash sten valves I

I t

er other devices are sheen to be required to the strost 1"aterest of system saMy

.c fe the perpee f in-serviae Am.p=uam and tesuas, estoset, ha o or,k th.

l-4 i,

et. af nD.8.

I r

5-910.8 Ary step valve or similar devios em the inlet er dLaoberge aies af a pro-i e

1 testive envise provided in contasutty with b910,7 shall be se eenstreated, west.

3 ties 3p mostrolled and interlocked that the requirement of Ep10.1 mill be sempiled with under all senditices of operstice of the system.

1 f

d Parsersch L710.1 sianit states that the pressure vessel shall have over-pressure protection, i

B18145 i

b

- - - - - - - - = ~ ~ ~

_. 3 i

....~..

~~-

5 bi 4

1 f

i O

s-O i

i j

L I

1

== ~:xmm i

i t

i Tarcet a.ek In vier of the high t.t u. T-R walvo, it is r.co and.d that it rossiv.

j as further o.nsider. tim for our preme.t.pplic.atias.

i

,4 h

_,3 a

)

i umwi.sn.

t.

suc-v e,=7 t.cr.,.w

,.rt

.s ic,

,,.su an e m.tr Sm. nt...

I l

.huiv =

t iri..u

. :st. u i

ri we-,

t q

and it iag therefore, &* that th. Cro try valve rys.1ve me rurther

)

i t-r.u s.,

,- t.p u u w (c-ttau) 1 as mzuuor=1u h.,n

..rr d.:

u d.r3 w,

l, s

i.

- ~ m-or -.,

a i

..ns.= u

.i

.,-u

r. e nr- -, a u ~ tw.

i t

{

pr r

st =4 es t saretr v.1. h eur.rr.ne st n. m e = tm. nr r

,.x.

4

'I a

1 1

I l

o t

-)

1

{

t i

u 3

l r

e i

3, j

l l

[

B18146 i,

I 1

t J

'_.,. m _ _.

i

(

yrr yw-w----r tww m-y- - - - -

+-s.,-----

w-,,--

-e

--w-wis.-w e-r-

m=

w-

+e--

m--

It i

e 1

i I

{

_. ~ _..

a.

O O

s t

J TELE 1 1

_N k.

Arryt.

T.R

_C-A M

d i.

.)

A

$21,000 5.A.*

N.A.*

8 A

i a

28,000

$1k,lt.5

1. 10,600

~

3 3

C 69,000 E.A.*

N.A.*

]

[

a a

n,s=

u,s3r 36,em j

z sr,r=

33,6n as, =

i I

j r

63,em 36,r32 29,0=

)

)

'E.A. = tot Av:11abis J,

~

M 1) Safety valvo costs are htsed en qamsity disoca-te abers W" :

e a:

i 23 cm oc % oot<- -1

.3 1

1 1

'1 u

l

.h A

.4

-u

-)

r a

2, 1

i

.n

?.

a 1

• A' 1

..),

2 B18147 a

-NF 1

65 d

N

--e.'"'7 v

e

I.

i O

O a

q camart U/W've-- ama,,y n

vws.s T

j I

(h f

()

{

)

i l

V V

saa-~,

s -

saa n a n, o-j rest a m a<rY a nes= e < pn e i r y

)

L vaeves i,

f e.ves Q va I

c E

iF i

fMa VALVC i

cosrs *76co 3

r.:

f i

1 v

i

. 8 1 Arxsanessor'c' A w easuawr *p '

u l

J Afi'Ac,ry a

vd'ves g

%7 s

i a

n t

g.

g pass li G

4h MY'*W %

l vaues A

I a

e

_a

/dfYS$0$

~<~rs $

~

~

'?

outyoae vasve to ne ceaseo ar sras B18148 e'l I

A.w saes s" r "a Q

a y,,,.aasr y *

>l 5 4' W W W $

\\

v,..

'M

<=

t t

_.__.__.e.--