ML20024B540

Summarizes Pressurizer Level Investigation/Instruction 196. Potential Sources of Measurement Error Examined & Simulations of Accident Run

ML20024B540
Person / Time
Site:	Crane
Issue date:	04/12/1979
From:	Fairbrother D BABCOCK & WILCOX CO.
To:	BABCOCK & WILCOX CO.
References
TASK-06, TASK-07, TASK-6, TASK-7, TASK-GB GPU-0295, GPU-295, NUDOCS 8307090101
Download: ML20024B540 (28)

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n-line sud pressurizer 8 Level measurement designs. -In. additio% potential sources,.

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Su= mary of Prr.sautizes Level Ir.vesti-jpy,'

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INSTRUMENTATION:EPRORS W-The priz.ary concern raised about instru:nentation accuracy has been the

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possibility of abrorbed hydrogen in the referenes coning rapidly cut of

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f C.e solution and b1cviss water o'ut of the reference leg. If this occured the-h E

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presuurizer levd measurement vould read higher chan the actual level. This L

potential problem is reported in all Westinghouse SAR's and is stated to be F.

I the reason for a<* ding a bellows seal to the reference' leg. ELW conducted g,

k tests at ARC in 1977 to determine if effervescence 'of hydrogen in the refer-I. -

t ence leg was a probles for B&W plants. nese testa demonstrated that foe a

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10 second transient' from 2300 psig yo '1400 psig, there was c.o measur'able loss I. ;

On continuation of ' Ee transient from 1400

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of veter in the reference leg.

e psig to atmospheric pressure, sf snificant loss of water occurs only after s-N 9.

\\. :ths pressure has decayed to Lder 400 poig (Tigure 1 and 2). Therefore, for.

the THI-II transient do lon of water from the reference leg would be ex-pected.

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The possible imats,i:sentation errors hav-miso beari calculated.. A realistic -

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estimate of the eune in the level m asurer..nt i.e about 210 inches. A I,,

vorst casa determination of the error in the level seasurement is estimated

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l to be about 142 inches, ochte potential sources of ' errors (e.g., the

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STRULATIONS Simulations of the first 0 r.inutes of the transient have been run vitT. both-i.;

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s crends in the pressurizer level are id.tutical with the recorded daca Qigures r

• and 4). The conclusion is that with the relief valve open, the presa.urizer

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E. A. Vomack to Distribution. 'Tressurizer Level Haasurenent.

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Instruction #196" o

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E. U. Swanson to D.' u, LaBelle Pressurizer Surge Line Configuration."

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April 6, 1979

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.e C. J. Hudson /.T. Snow to R. N. Tornov. " Surge Line Design Criteria."

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April 10, 1979 4

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C&I Task Torce to E. K. Vomack. " Pressurizer Level Mease.rement."

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April 10. 1979

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D. V. LaBelle/A. Citarakhani to E. A. Vomack, " Pressurizer Level Erro,r -

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7 Instruction

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,r THE BABCOCX & WILCOX COMPANY

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E. R. Kane bT

..JffER GENERATJON GROUP A t/ sc(.w.fr#1

0. H. Roy

', $ g To l

J. H. Taylor g

DISTRIBUTION ij@

i e Froe

0 E. A. ICIACK - MANAGER, PLANT DESIGN h

e Cust.

File No.

i

_.O or Ref.

Sutd.

Date s

PRE 55'URIZER LEVEL HEASUREMENT

~..,

APRIL. 6,19h9 - 1:10 P.M'.'

TE

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p O!STRIBUTION

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T. %.:1' g E. W. Swanson D. B. Fairbroth

, D. W. LaBelle

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The NRC has questioned the adequacy of the B&W pressurizer level measur'ement

- a v..

5:.

stating that an erroneous readir.g led the operator to prematurely turn off

' j,-

p.

the HPI pump. It was also stated that the B&W design was unique in the

!. N-Indus try. The areas that may be unique are the level measurement arrangement l'-

f [-

and the surge line configuration. To develop a reply the following information i

g..

. is needed:

h t

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1.

' A comparison of the pressurizer level measurement on THI ?

i-

.::,, *g(

Westinghouse and CE plants.

~..

E. F. Dowling.

3 y.

u,.,

2.0 The differences, if any, between the.THI-2 pressurizer. level measurement i

/.j. 'I ;E-and that used on other B&W plants.

E. F. Dowling.,

p.

3.

A calculation of the error in the pressurizer level measurement under-4 P.

two conditions:

E. F. Dowling.

r i;'

p a.

Realistic ermr assessment based on negligible instrunent f

error and a realistic assesscent of process effects.:

+

a. E..

.lj.

y f.

b.

Worst case error assessment based on worst case instrunent

.f. ji F-errors and a conservative assessment of process effects.

i-.**

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A couparison of pressurizer surge line configuration on both current.

v

~

and early generation y,, CE and B&W plants *.

E. W. Swanson.-

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E..* 1..I;'.

5.

Using the infomation in 3 and' 4 above, an assessment sh6uld be made of a

..{

Z actual versus indicated pressurizer level throughout the THI-2. transient.

-?

f D. W. LaBelle,.

)o i

[

a:

The primary known differences between the B&W and Vestinghouse designs

. M are in the use of an isolated reference leg by Westinghouse and in the use of iE*, - F a continuously sloping single line by our competitors. The information in o-the WSAR's' and the ARC tests on effervescence in the reference leg should be-L used to biacket the process effects.

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• *i*. f" Instruction No.196 7

April 6.1979 - 1:10 P.H.

k.y}q-i

.M.;;.N. Pressurizer Level Heasurement - Page 2 Q==

irj:\\ e

~

. The overall task should be co-ordinated.and pulled together and documented in H

.. f4 sur: mary fonn by Messrs Swanson and Fairbr.other.

[

-.C The response is requested by April 9.

Results should then be presented to Roy.,

~~

Taylor. Wocack and Suhrke before release.

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T E BABC0CK & WILCOX COMPAllY POWER GEllERAT10ft GROUP j$,f u t.u,./ n 2.

,n a

.u h:. yp D. W. Labelle, Safety Analysis

. To l

-i f R Fron sos ess-s' I h" E. N. Swanson, Plant Integration

..a!

File No.

Cust or Ref.

{i _C Dah

,p Sutd.

April' 6, 1979

_.j p Pressurizer Surge Line Configuration g k 1

t g su..

t ?...

L..

W.

'.. ~5 The follo. ing information is available about the desf gns of the '.

p pressuiiz.er surge lines:

-...g Y

g..

y P '..

/..

g 9-

..[ f 1.

No loop seal ~ exists for later W plants.

,l I

r

.-..-! E ' D. I V:

C.J.

Probably-no loop : seal exists for 'later CE plants..

i s

i n

.2.

No information is available for early plants'. -

! 6

.4:

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v..,

3.-

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t.

.~

?;-

Drawings 1 and 2 show plan and elevation views for ]f, plants.

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~

Drawings 3 throtigh 7 show the Combustion Engineering layout.

i ;-

7. ~

~j b Superimposing drawing 6 over 5 allows us to estimate that the

~

'~

vertical distance from the pressuri:er outlet to the hot leg f

"~'

! fi' t ?:

e,7 *

• l.'

[ M is 12.S'.

Other B41f plants are similar but not *

..,; E Drawing 8 sho'ws Thll-2.

~

' Skip Hudson.is preparing an information package to be...;

e.' g,' *

, gr.

u.

~

exact;,

v.,

l available 4/09/79.

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Rt Over the last few days we have been trying to determine the desien basis of the

FIJ, pressurizer surge line reuting, and especially the loop sesi that it contains.

@?

The only design requirement that we can positively identify is that the surge 4

line/ pressurizer arrange:ent cust be suon to allow pressurizer. draining and The STD-205 E'

• alaintenance while keeoing the core covered and decay heat operating.

require.?.cnt is that the surge nozzle shall be 20" min above the cente y

t.

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metrd and has the surge nozzle cccing off the middle of thz pice in the horizontal outlet nozzle.

The pressurizer. ho.rever, is abt 30' about the snrge

.-nozile so caintenance can be perfor:cd during refueling.

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'run 'of the outlet nozzle.

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1 ' ' 1!e have co11ceted several opinicns about why tlie surge line is ro~uted the way it

. k+'C is and they are as'follo.ss; k'.

Tom Helms thought that a loop seal may have bee'n specified in order to ntni-4 mize the collection of non-condensables in the pressurizer steact bubble t hich 1.

Having a loop seal may a;

g[Mgould ir. r.eirn the effectiveness of the pressurizer..also reduce the frequenc

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L,

,g 4he pressurizer.

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Having a loop seal of sufficient height will preserve the pressurizer sater

- *,a inventory above the cressurizer heaters under certafa circu= stances such as M,h

.'2.

-when there is gas (no catter what the pressure) in tic area of the surge *We

.D' mozz1c in the pricary(icoo.TECO).

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P ants except tiSS-14 l

! E-One of the pricary deterninants of pressurizer location / surge line routing is

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3.

building layout and equi;r.:.cn Iccation. ?!e feel this responsiveness to

.Custccer's recuests acco.;nzs for our varied oressuri:er locatica and cay have

• I

. contributed to the original 1 cop seal and sW,cquent continuation of this e

p design.-

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Although the Control Analysis I'roup has never soe'cified a requirerent o 7 yyn 4.

h

• . " pressurizer / surge line arrangement, t eyration and have found the arranD The cressurizcr water in-L(o a

IM-ventory is not reoutred for safety injection during an accident.

7 yV

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We also performed a review of the Combustion and 8kstinghouse arrangements and k

Data we have found suq est that found that neither one contains a loop 5.eal.

[.

L'estinghouse has a continuously inclined surge line with the oressurize 4't..

.., e

.0 nozzle. above the hot leg.

but the bottom of the pressurizer is above the hot leg as in,H E

A review of CESSAR and RESAR has shown that neith F-.

g

.f In sucnary, we have been unable to cositively identif-* the rcquircnent, if any.J...*... e

~.

of having a loop seal in the surge line.

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/W/,h/ wif-Tjgy,".

To l

ir E. A. WOMACK

>l sos m.s

[

0 Fron C&I TASK TORCE. LOC CI #141 e

File No.

"..f,

O or Ref.

Cust.

- r.,.

. (,

~

Date

'.W' s

subj.

8 4'

T APRIL 10. 1979 L

$ su. i D.

REFERENCE:

E.A. WOMACK TO DISTRIBUTION 4/6/79, 1:10 P.M.,SUBIECT:

u PRESSURIZER LEVEL MEASURDG2fT

- '- M' ' ~ '? .

[7 r*.

c. L,

..,. ' ' - O....

~.T...V

'l,

.I ITDi 10F REFERENCE LETTNR t..

+

C.E. USES A DIFFT.RE;TIAL PRESSURE TRANSMITTER VITH A REFERDICE LEC TO

~r -.. c.

r MEASURE PRESSURIZER WATER LEVEL. DETAILED INFORMATION IS NOT AVAILAB

~ t.

S WITS A REE RENCE b,

- VESTINCHOUSE ALSO USES A DIFFERENTIAL PRISSURE TRANSMITIER.

I

^ '.

LEC. BUT THEY HAVE A BELLOWS SEAL IN A POT AT THE TOP OF THE REFERE c

,,.-....,a..,..

L r.

U, 3-

• ITDi 2 0F REFERENCE LETTER W

.THE BASIC PRESSURIZER LEVEL MEASUREMDTI TAPS AND TRANSMIITER 4

E..

PIPING AND ROWING FROM THE TAFS TO THE TRANSMITTER C.

ALL PRESENT b&U PLANTS.

t.'.

ARE DONE BY THE LTIILITT AND WOULD THEREFORE, VARY TKOM PLANT TO PLANT.

m.

+

-~

.g.

7, El ITDi 3 0F REFERENCE LETTER _

f(

E.'

rg '*

" REALISTIC" ERROR (TRANSMITIER TO RECORDER)

. g..,

e.

c' / *

~

. Q

[*

i

+9.8. -8.8 INCHES

('

P.

" WORST CASE" ERROR (TRANSMIITER TO RECORDER).

.g

..?

.h.. '

. '... ';.,l..

l:".... '..

G' i

+42 INCHES g*

.~.

j.:.N O.

(THE ERROR CALCULATIONS ARE ATTACHED)

E.

p.

yy... y&.

~

1

. - c,. g : x

,_ c

.. g f

nu./vh3 p.

1

-.x..

t' t-

[

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e l

l g

t-p

_..,.7..g.--.yg,.

p.e.g.m. p

...y._

7

.. r

...'L~.,.

.w

. : ;. : N ' : _.* W+- G N

t w

H.

~

v -.

1

---

.+.-#._.;..

.. 2.._,,..

ud

/

'1 F

a, PRE 55URIZER LEVEL (SAT. COND, 200* - 670 F) k ADEQUACY OF LEVEL INDICATION (FRIOR TO THE EVCT) h.it'lT*

i VORST CASE (SUM OF ERR 07.3) EXTRDIES TRAMSMITt 3 ACCUKACT (SOURCE bCCO E21-17) 0.5% OF UPPER RANCE LUTI h

TUTERATURE ETTECT.0l*/*F N

I

~

APPLICATION ACCURACY RANCE ~~.

2.5 I.5 = t 1.25

]

~

~;]_*

[if C APFLICATION T DPE3ATURE ETTECT 126-70*? - 50 x.01/*F x 400 = +1.25%

.......-....r_

., 'e..,

,7 f..

D DSITT OF WATER CORRECTION = t 1.00I OF CALIBRATED RANCE g.

TRANSMITTER DRITf =.15: (3 MONTHS) x 4 = t.6% TEAR

.g y,.

]. % p.

surrg.T vouAct EFTECT (TRCH 113 VAC) =.005%/ VOLT t 10 VOLTS surra rREqucCT ErrECrs (r205 60 HIErz) =.025Z/EZ t 2 HZ.

{',~,][',"

(.

s.

sgryu VOLiACE EFFECT =.005% x 10 = 1 05%,

/, c

..e t c,. t ;...

.y.- {

..)..... 6 g

e

. - {..,.Q

..J L.. ; J. N %.*. ;.-

SUFFLT FREQUDCT =.025% x 2 = +.05%

.,..s J. -

l.

sun OF ER.30R5 TRANS:s'ITIER

.,,.,. ' f,..

.... b -

.t

,,...,. -?.,.y:.. *.

~ ';

.'2,,

(',',

ACCURACT.

+ 1.25%

..,....E*

i*

n'

.. ' '. ',...h.,'

h.,

• • ". 3.,, t.,.

j *, ' '.

TDTERATURE

+ 1.25%

e t.

,..r.

p.,'

r 4

Cat 1PENSATION + 1.00%

n.

'.60%.

Ee.

.. f.,,

f..

DRIFT

+

.y F-

.s:. '-

YouACz

+

.05-

x. ~.

• • ' ~. ~

w q ' ; c...,. '. 4...

e

... C.:...

i[-

TREQUDCT

+.05 U,

k.

+ 4.2% x 400 = 16.8 inches

r. -

..m.-

2 p

~

~

6

.a (SOURCE BCCO E12-92)~

.., [r,' ;

y.-l J.'..

RECORDER ACCURACT*

t'O.5%,RANCE 3

?,,;,

,, e. '.

E T DPERATURE TJFECT

+

.0 F*

surrt.T VouACE

.11/YCLTS I

^"

-[

2Z/EZ SUPPLT FREQUENCT*.

b * ~*;

[

. j e.

f.;

AFFLICATION ERROR

= 0.5%

- r~

s

'. J.*... "

.'t TDTERATURE EFFECT

=.012/*F x 120-40 = 0.8%

=

. ~ ~

t

=.12/V x 10 = 1.0% '

'/.

e, ' '

l. '

J, SUPPLT VOLTAct l

rREQUENdT 2x x 2 sz = 4'.0%

1 m:

F# -

2*

g.

m p'

c-

-t e,.

.(

SCM CF ER.RORS RECORDEF.

s. ' **

r..

hi

+T 5%

. :. g ; r. -..,..

.~....e..-

s.e.

~

ACCURACT r

y TETERATURE

+.8%

.a l' -

L voltage

+ 1.01 6

(

[,

yggqunCT

+ 4. 0T _._

1.l.

~.

+6.3% x 400 = 25.2 DCHES j.

b.

n -

.~.

'pa'

.,B.

e t

."m--

g y. 7.-

g v---

y,,

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-.. __ - 2 =.

.._._,.-~ -.,;

i I

v r

i.

OT 3 '..

h 4

3-..ll -

. ~ * '

SUM OF TRAN5MITTES + RECORDER V ' fG' d

?et"*"

TRANSMITTER" 16.8 INCHES

.a s

t

'n 25.2_

s" RECORDER

]

7

'u.

TOTAL

+42.0 INCHES

. l.

y.c

..s

.. g.,

• REALISTIC ERROR (SRSS) NOR'tAL CO?.TTITIONS_

,.,.,;.,, m...,.;

r.

TRANSMITTER ACCURACY (SOURCE ECCO E21-17) + 0.5% URL

.i X W

.' +.012/*F URZ,

.. r-s TDtPERATURE EFFECT

.00 e

T<.r. '

r 7

SUPPLY VOLTACE EFFECT (118 VAC)

L

.00

, m.

SUPPLY FREQUENCY (60 HZ)

+.15%

~

~

k S

TRANSMITTER DRITT (3 MONTHS)

~

'E

' ~

t-

\\*

')

URL 1000 = x 0.5 - + 1.25I.%

-1 APPLICA'IION ACCURACT CAL RANCE 400 2

x.01*rx(90-70/F)=+.12%'

(SYSY'"AT)

[ '.

h

=

l Ta(PERATURE EFFECT

. RANCE

+ 1.0%

=

w.

- --- -DENSITY CORRECTION y.

.0

.a p.

SUPPLY VOLTAGE EFTECT

4..

m'.

4

.0

• SUPPLT FREQUEICT e

+-

k

~

i.6J TRANSMITTER DRIFT 1 TEAR

.y.

~'

'~~P

. TRANSMITTER ERROR (SRSS)-TC

~

-:D Tg.

9/ Rxic0M'+ sysTctATIc e

...' ' i 6 3-n..

V.

5 T

I N'

TE = + d 1 252 + 1.02 +.62 +.2 j

p.

l g

~

l TE = + 1.70

+. 2.

i

~ *'. **

TOTAL TRANSMITTER ERROR = +1.9% x 400 + 7.6" H2O 1

IIf.

' ~

2 s-1.7%

'- 6.8" H 0' c

r,:..

~-

. >,. ~.

e-s f.'.

.?,: '-

~' ~

.+.5% RANCE s;

...o c3.,

o RECORDER ACCURACT s

+.012/*F *.

u, P.'.'5;

.. ' ~

.. f,'.7l *,.s re-6:c s.

TDIPERI.LRE EFFECT L.

r.

, SUPPLY VOLTAGE (118 V) 2.1%/ VOLT

.J.

k.

~$2.0%/H2

. ~ ~.

~

k SUPPLY FREQUCICT 60 HZ (60 Hz)

'~

r.:..-

+ 0.5% RANGE g

,{

APPLICATION ERROR

( SY.5T e M WCg

,.p

-y

.u..

+ 0.05 TCtPERATURE EFFECT 75 F 15 F 4-00 j

L.

$UPPLY VOLTAGE 1187

. f.

.00 SVPPLY FREQUENCY 60 gz y

--g P

P 4

g,,.,,. wy]". QN Y$

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9 p, h h

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EE - +.55 1 400

+2.2" E 0 t=-

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2

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l a. *

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2

s..

m 8-O

...,. *-..... e-..,. - y:.

..s.s",,a 0..

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a

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. THE BLDd. TDtPERATURE DURING THE ACCIDENT PERIOD OF

• ". 2,D...

Y u

9

.~

}.i:

I" ASSWFTIONS: 1.

INTERECT HAD NOT EXCEEDED 120'T 701 UORST CASE.'

x

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k.

THE BLDC. TDiPERATURE WAS A 90'T AT TRANSMITIE1 LOCATION

\\..

2,

b.., '

. l. * *.

G '.

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L IDE EIFECIED ELROR.

S~**

THE. TRANSMITTER DURING PERIOD OF INTER.EST HAD NOT RECE t

v.-

3.

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6 0

HORF. THAN 21101 INTICRATED DOSE.

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.:2.

THE BABCOCK & WILCOX C0hiPANY CC:

R. 0 h D POWER GEttERATION GROUP j [ g;,,,,g r.

9 H. ROY 1 i

0. B. Fairbrother V M' E. W. Swanscri g ='

y, l

E. A. WOMACK. MANAGER PLANT DESIGN-h D. W. LABELLE. MANAGER. SAFETY ANALYSIS (2117) W ^ "

J..b; 4 A. GHARAKHANI. SAFETY ANAt.YSIS (2126) A/[

[

oS **8 8 From f

-[ ;D File No.

• .'. ~ 7.O.TI 1::/ *..

.. ~.'. ;.

d.

or Ref.4/9/79

......g 2:45 p.si.

g Cast.

Date Y

THI-2 INCIDENT he,-z APRIL 10. 1979

- "~

Subj.

PRES $URIZER LEVEL ERROR EVALUATION

• gm..

r...-;

.3 k

THE PURPOSE OF THIS MEMO IS TD FORMALLY ADD TH a..

n ',

. '. ".I

-\\ '

, GROUP TO THOSE ALREADY VOICED ON THE PRESSURIIER LEVEL INSTR

'l p,..

ERRORS IN GENERAL AND VALIDITY OF LEVEL MEASUREMENTS DURING j.-

C AFTER STUDYING THE SITUATION AND REVIEWING THE

~

f e.

TRANSIENT IN PARTICULAR.

• INPUT FROM PLANT INTEGRATION AND CONTROL AND IN g.

. x. -. -..

+

. ' ' * *7

• F.

" FOLLOWING POSSIBLE FROBLEMS AREA 5 WEPE NOTED:

p 9:;;. 71'..

?

a

< '"." 4*/ * * " O ! '"~,. %. * ""' ' * '. ;.. ' I'l.,

.' q.;.

.~

"I = INSTRUMENT STRING ERRORS' V

2 = DENSITY CORRECTION ERRORS FOR PRESSURIZER INVENT

~. ~..

~.

9~

f, 3 = DENSITY CORRECTION ERRORS FOR PRESSURIZER REFE

.i

(:.

. ~~

' ^ * *

~'

V b.

4 = EFFERVESCENCE THE FIRST 3 SOURCES OF ERROR WERE STUDIED EXTE c..

F A.

7.0

~. MENTATION UNIT AND FOLLOWING PRELIMINARY CONCLUSIO

)".*

,h

" I '.. -[ t

~

+ 28".

m, y

REALISTIC ERRORS y,ge.;

m..

nv e:-

3,.

+ 36"

.;9 '

f:,

. 3 I,

WORST CASE ERRORS

,.. * ~ - -:;-

t 5-13"

.c.

g

[

AN ERROR OF THIS MAGNITUDE SHOULD NOT HAVE EF

...... r

}.

p.

,;.t

,..c...

k 0ti WHETHER TO KEEP THE HPI'S ON OR OFF.

h *.

?.

'.?

m....<

g VED IN

.IT MAY ALSO BE HYPOTHESIZED THAT NON-CONDENSABLE, GASES W 2 a q

y 8

,~

i *. '

.{

l

.

• r:.

.s c

m.

E g,e=, r7, r -- -

a

,,-p...

5

-.w.

-v....,awm.-,.

.Q s

i.f s y -',

m

'-

• C P-_J

• w{.]

,].-

. t4.~ipM* *. 9.u,,

. A [A A E*.2 n.5.h -eu [,

~

-T 6

.O NI

~a.

m....

J t,_

. t "...

w PAGC M

}D LABELLE/GHARArJiAu!

t i

PRE 55URIIER LEVEL ERt0% EVA".UATION ARPIL 10,1979 AP 6

Mn g

-~

b THE REFERE!!CE LEG WILL COP.E OUT OF SOLUTION ON A RAPID DEPRE

',. W 1

k THE PRESSURIZER. THIS HYPOTHESIZED EFFERVESCENCE WOULD THEu c$

CELL TO REMAIN C0ftSTANT. DUE TO REMOVAL OF LIQUID FROM THE REFE V.

• w AND PRODUCE AN ERR 0NEOUS READING. THIS PH.ENOMENON WAS STUDIE

._ 3:.y" t g.

i.

~

~

SAFETY ANALYSIS AND CONTROL AfiD INSTRUP.ENTATION UNITS BASED ON

'~

DONE BY ARC ON PRESSURIZER REFERENCE LEG EFFERVESCENCE. AR

.4

., m

'a.

7. j-DICATES THAT THERE IS NO MEASURABLE LIQUID CARRIED GVER FRO w

LfG TO THE PRESSURIZER VESSEL EITHER DURING 10 SECOND RAPID p.s.

1

..R 1

1400 PSIG OR WITHIN THE 5 HINUTE PERIOD FOLLOWING THIS Q:.e p.

h TRANEIENT FRON 2300 TO N.

^ ~

THUS. BASED ON THIS TEST. ONE CAN CONCLUDE THAT' EFFERVESCEN TEST.

]i

~

.NOT HAVE OCCURED DURING THE TMI-2 TRANSIENT.

1

?:.

. ~ -

c.

+s, 7.

Rt.

~{..'

fj' N'b '.' ' 5 ' ' ' " '

. D ' ' 2-I.'

^ ^ -

' FINAL CONCLUSION (N:.

^

J. THE FORCING CONDITIONS PRESENT DURING TMI-2 LOFW TRANSIEN

- 3 SG R I.

? *. il'. ' -

1. -

SUFFICIENT TO CAUSE THE HYDROGEN TO EFFERVE50E.

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ASSUMING N0, EFFERVESCENCE ANY REFERENCE LEG TYPE D/P MEASUREMENT k

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