ML20212H499

Forwards Summary of Major Events Occurring on Day 31 from B&W Trial Records.Questions Re Steam Generators Raised

ML20212H499
Person / Time
Site:	Crane
Issue date:	09/30/1986
From:	Davenport D AFFILIATION NOT ASSIGNED
To:	Blough A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20212H217	List: ML20212H271 ML20212H499 NUREG-1019, Forwards Response to 860915 & 30 Questions Re Steam Generator Tube Rupture & Turbine Bypass Valve
References
NUDOCS 8701210461
Download: ML20212H499 (5)

Text

,

i

[TO:;

Allen R. Blough,

1. U P E 'I N'6 Reactor 1-rojects, Section 1 A, i

Division of Reactor Projects, 1:RC Rocion 1,

.-631 Park Avenue,liing of Prussia, Pc.

Dear I.r. Blough:

l' As I taentioned to you in the beginninC of the Unit 1 Salp Meeting, l'm forewarding the identifying data on the Day 31 I

page fror. the B&W Trial records.

The.page in questi~4 is 1

the H. L. Long Exibits...Exibit I! unbar 692. According. to the i

l l

I cc s in the accompanying cover letter, a copy of the exibit, l

a sequence of events, and the letter were sent to a E.H. Grier of Region l's Office of Inspection and Enforcen:ent, so you may L

have a full copy sortetthere in Region 1..it also went to an S. l..

Varga in D.C..

I'nclosed is a xorox of tne cover letter.

The Day 31 ovents did rt cc some additional questions regm ding q

steam generators whcu primary to secondary contamination of note occurs....who authorizos the continued use...or putting bach in use of said generators..and what arc. the fac tors governing such decisions.

If I understood correctly...there has boon som initial study or decision underway which advocates the steauing on the dataged generator, rather than its isolation...and that by so doing... releases would puroortedly be lower to the envirumont outside the plant. Could you comuont on 'that again, or could. c.

Conte..I believe he mentioned the study in progress.

I uay nt>t havo urAerstood the comuerts made're. the proceeddres to be followed regarding ci nificant steam tube leahs, 3

e' steau tube failuren.

Of course, it uust be assumed that all tube failures riould be s : ;nific.,nt.

8701210461 870113

.PDR ADOCK 05000289.

5 PDR

l (2)

Alco note on day 32, the B Generator was apparently icainted CCri">

because i.leasurenento on the station vont uonitor increased.

Actuall'y....the Turbino Bypass valvoc.:s9: isolated.

Would this cean B was isolated totally re. rol cosec?

The readinco on the 32nd day were felt to have -been due :to the changing of a charcoal filter; however, one might at1.11 wonder about the cauce of' the increased levels of radioacts ve materials present in Ti:I 2 on the 31st day of the accident.

'Am also wondering what stack monitor read in the 31st day, also ir sooo defect eninto, or potential for added releases is present 17 condensore thet would have caused releases like those noted on Day 317.

t since rely, d/%e loborah Davenport, 1002 i.artet Stree t,

Casp I:lll, Penna.

1701i 1-717-763-952 Also note, are copies of my letters, end the nerces en vell being sent to the 1D2c and the service lictc, ; onca not been able 7

to Get to document room, and was not certain if all data rac boing cent through.

If it has not included, I would like to requent that all letters and xeroxes be sont out to all of lists etc...

if co I thank you retrospectively.

i P

J

~

v.#. M M...... 7d. M...$ N.

/

os

-ry.,

m'.n;. 'Q~ -Q?;qy' %7 %.5%w;iM s

%E

.1

i qm@@.

X

..%... ~ML: 2:,u..'r Rh:[.

.y.

.... e - e

~

m.

v s

.3..,..w 18 580

.S +

7 *. k

. n.. g..n;.

a'

.t..

a

+

I e:. m a..

\\

ggMb R..-

au 21.s nas. sect e

_,y g

sseo W

s'

> a t.:. ;k

.r :

Dj. i'%f! {d 1.f...c%.....,....

.. n.

W,.

J.

-;-1;.

f0

.'.&m @w.N -r.' ';;r.'"LQ....l:.

gesen.n chose ohnesmew 1

• :::... _...C.,4,.2.~.

(

', v.;;..*x.+m&.L'*d~'iqf,:. {.,f.

.: v t*R;da' Director..y.7,,y:&..qs.}

5.'i,":,&.m e..,%.]* ~. ' i y;.

. e.u 1

c

.s

.a.

..,.~st,

.V y X.

2.:.

y.

.ql i

f.-.,j.

w,

%.;..q- ?.

3

. :%..; 4..

T

~

g,gr;.#

4

"-- *;,9Mf - :.%.e.:m ;;w.4&.j..-v ;: ;. :.;

.?.

Hr. 3. E. Criar y

T g.s e;~

.~...,

OMice of Inspe, tion E tafs.-

.}%,pp.., ]..

6 vy

~r

.t e ?.?;;gg,.%. 'f. g..I C

.e.., C.ff, 2f

=

!f:..

Regice 1 f.

t

.t:K h{

.W

. c,.

3 n.m.

U. s. Walear Re

'.M,;;,2 z

e n y,,3 3,,

sniatory commissima"s e,".w a.y o...C..

,,.. g 3. F'. $ M.. w.:.f.

........,;r :p v

3. " p e.,

' King of Prussia, Pennsylvanla,,19 9. 4

-*-Qc'..p',.

-J. E

.s".

e.

s

. m...

N.*y,.

D

.A. y

-....,...s'y y [v..4.".,:.. '., ' ~

3,.,

'.,.,,3.,y. 9 r,..... s.q near s

.... g,r... e..,,,, a '_ ;.,~ :

s.:

f.y. h

..a.

' Thre. xii. Island malear station Unit 2 (. 9.,...

3..

'6m.. S 1

-gm.

operatins License n. nez-73 TxI-2). ~. 4

. u (..,..

'.9t8.'a*.

nocket so.30-32o

>%sq,.)]

In our letter of July v.

er..

g.

16, 1979 April 30. 1979would submit a detailed sequenc,e of Eventswe indicate "O

• p

-c :.. r

' "5 add this attachment to Section I of our July 18 Inclosed p

..? ;,$ '

T

Q.%.n.m'V$g

,c.. t*";

s.

Please

,1979 submittal.

.s.....r.....,.,z.

+.. e :. r.:..,. m.,....

c.:...,;;...:.:.:......w...,.... '.i.v. *.

~ sincerely,'

-L...:.. - =. w.'.;:.'X..=.

A.

.?,

a

. 4 ll.. : ;.-

. ~..

. n.~.,....

x fig. h.f%y

..,i.....

' ?.,.., w. rs.y.r.n?..r. -..'. :). M ? f f. Q ^

<.s.,... p. - + jsf 4. g ner6 eta ".s.

.e

~:

..:. ". s.

n

.a

~

.. n - 9<C......

.s..s.,. Q..,;,

%,y/9 tM

-'. J ".* c.G.U.*

.f. 9'.', $ " ". u.c,..r a. marseln

'.;' %.hf,

?q.. t..

. t.

T'iS:i.?.:T c.

,. s:s

..w y:?

aca:nustseA.n ^..-G &. W i @6 m.,.

Tice President-Generstion D'@;+.*,% M W:.

v;c.,;

r,,=.,, a y.. m,.f. w, + m.,u. 4. Q. &s q %y,.

x.<.. :

, w,., a.<.

,;..e..(

..,n...p.:. >:,. '. :.'-G

• y w

L.-::.. ~A., ~;.x.a.t.g.

y.' n. w s h '. '

'h N er nirector'of m elear in d z?;. p.... s..

s.

3%w q.... ~z.. w.::,.....

g ee:

Light Water Reactora 3rsach No. 4 ?.h M.W Attar S. A. Yargs.

'rQQ c.$

%hy

W.f;Fj,YA*'Y4

v. s. nc1sar negulatory e~-W Q:y ! q ? N *4 '*:f.'3.sq.,.{

• W '.Cc'..

MS J,3 Washington. D.C. 20ss5 h

?~~~5N

" Yh -.:t v-?

5 6.'

J

, g 4:.gl@4,g. : ::~ -)?['n.g; g..... #

'n.(pk.

^

\\$@et:h.

fh.5:: hh'x.y

,je',..

, % 44'

' ge..~q

-'.. - - N. a.

.% m

.. ~.at.c.:.! >

• 2-

.w t.r a

a

. 3.. W. w..

- - s.q...~a.,.1 47sQ.f&,

• f, tic,~

e;

-Q..

..s a.

...f.. Y E.%eki.1h.'ibr;\\D.= ~ &p..

.s

9. %.

=

c

)

. n.: ::f3,e..

9,,

,:. py...3. CM't-1.Q..;\\;:

• 2 cs

r. -

• %,...f*

\\

.v

~

T1.

+

Q.S.V..

f v..

6.;..

' ;4.-.m.

g

, 3...._; g....,

. n y. R;n.

..,i.

n.~.

n.

....? :., :4. 9.

~+.4.. :...

M W.

. a., a y,,

s

. M

.. m W

,..y s.,.c

$, yen ',%.;

e.

Mr m.,w~?m.,_?.

. p..

. e+~..u

.m

.4

-. g* +:.ym..

t. m.,- t.: w.~,:. 4 %.:.,.-

5

,. s.,. s. c,.. g. s, -

,s'

.~w

.1:. i.

-... m, w.y.p.. w,.,c-e-

..m J.

r

..,..t.

- - n

.g:. m.....u, a.,

-www

.p 4 c%..,a... 7. '~ 7.,

L e

.:. 7. @ 3_. p.... m.n g

5 t= y 3 -

v:,.,. ;g[=

r

u... m;.u ~...

.n 7

p e

w'

~

.s

.t i

c /3/

, -.. r

..

-t.

~. r>:.

.d' w/ *. d r

.e.%5.

=----v%

y*-

k a

t

.y...,

W.;_::

3.

t

..dE*

.bd=s C 'I. g, e.

~K.

41*473f;~v 4:.

G.. <.Pg'WW.,..

N..-

..k c.

O n-

-#^

,.. '.* ** %m~...

g

,*3-

- I 2-..-

\\

a.

g pA\\)V.$ -

[d I

... - ' =

m%

_-em

&.r:-r...,...

1.N.'i,=^4g. &.@5$EGM.r.d,y..a.s M..*.uW.s'yps Y

• ..,,<n 8_R; Y%ef['. '

,;'.'a;&'~m"p'f'.(4.;'":".*.

.'? *m'. :."L.W:@

} y.

.e'.,..t.H.;

s=

~

~'

.a

r. n

_. ~

m rw.2~1".~' T 3 L. _

~1@sn.na,. ;

7"'.WE

~

. F.

u,

.-. L.......

i Inter-Office Memorandum

.. g..

4

?

.rcu u, un

..a.,

c-i i

4 2.

gl k,. )j service

' FELIML'tA:I A'5GIMID SEQCINCZ CF w

5 2

Everts, MARG 23, 1979

.'4 1379. ET. 0 TEEU,AFUL 30,

.g

..% u... ;. a..,.i.;

.. A 17 > 'i fj/,'

,/i 1

~

f

/

(f. M,t.c t

+

~..,. ~ W.,,'.,,,... ?.4 m.F. 'i.gi.u..

a...

v..,

na,,,,

2nz.

t u.w.o....;.

..,.3.rg *J '..... &.s.....

F 4

w.

v. mula (2P.t..,::.

.M LN c *,..

QW

...,.2.,.

• Messrs..

u. maux.1.. &h,W)m.:, s r'i,. u.

.s.

MG

s. ' uzxv.n

'W.:........

. +

N.

z. suzz h.-

.?G:!

?*:n >

77 c. ? -

T. 31CUCRTCE

! k M:kj-

s. noeIns (..

~

~~+ G. "q:g::f. e -g:f.. ',

c J. D UIILS

, ' 3. RD5GE 4

N-

.., ;i...

..s.. i ~ '

J. SEILI3Ct1.fD.

d. 4e.%..,.

Gs.Mii,,.

4' R. DIICIAMF o

.. 3 'f..r.9.. ',.

f.*N.

N cam J. TBctFE

,=y4Td,

... W.,>

J. EI15EII A. T= =. ".' ' ". *. '. '.

2 *u N

' '.f ~.

-. * + 7.\\

W,

. g:.'h L EDFARD T. YM vIT3ECI. c..

0..: '.. ~ i.(. t ;.

T,r %,.(0

'....,c,;.

r.

L IIMZ3

1. m anv (2) sm,-

,, y V. LA7 alt.IZ (tru)

L WILLI #ts.,9.'. ?, ?.]. J i, g,,,, 5 y

' 1 '.}'

..~

J. LocAs L VILscs si:

6.'

3

.~

h'

-3,*

e;,, :~ _ 4,.;.

'L ZZ3tcSII (IIU) -

t.. f.. ; ',,r,......e.'<..'

L LCMC L gocWAID E. '

s f.... (b.., -

c. MILT.ta......

...e w

.K-

.'t.a.

-.r M24

{ )..., '..

w

....,..e,.. r,,.,,u..... G..:. : q N....

.*2.

.; * ?

4

', l'

'.... -.. :.A.:,.

....-.3 1 %,. l.,u.n.; d' a ":.

e.. J

. W '5....

% t,*.

4... > r,'4....~'..'J.'.-'

....-i H

,M :... %..~'.". 2:,. 'JV.n~.G; f'f :;O.m:

l:*f.*.D-V 7.,.

r~

w a.:..- ~

,'4 f ' I :'.. ~....-.'.. :.. -

~.'

y :e.g.t...t;g:;;*.

,.-r: a

^

4...

t.

a e q,.g.}.h.f;.f;#-[.-:,...~ Q... :,. w :'.. : ' 7.

n.;.

.. w.

. c.

m :.,.,:te 37%g,('.

tacio ed h the 7/15/79 drare of Inv r; -

f

..-~*j...'.-

Y

s v.

~

v

.h

• A, c

Annotated Sepance of Events, March 29 h'64e 4.guae 13, is7s.Should you have any comments, plaase re, cura

.G.

e.

30, 1979.

7...)r.o.,..'yl3< p,::. :h.&p,;O en to me no later thmo.

~

v

2. t &W.

...e$a.... u. 7

ty%. M Q%. '$,$w*%; *.g w.,~

a$...d...I$$:.?..Eh.

.d e

~ -

. e.

Y..,. C

. y,.,.>.9-

• 5

,. ;..,..:,.Q;.,;4e.we 1v-2.>.).......P.b ' 5.

.;.v.

,.. m :..c %,,. W..,.,m...%.a..p. 4.

h. ~+.a.

.. 1.:.s.;... - - n.n:,.

+ y.%s.

r.,.. P* W..r..f. e.* so..

e....

.e:. 4. S.

.g

.c 2; r..

.t, m

%....s.,e.$RY.0,S.E?$. '?.n.:.

2.-m.x. f_...... y., &f: e, %. :5...,.. <..

n.

Q.a. a.. n.e.

.x.,

W,. 9. ". p. <

• a.a +.

4,d. ?

b '>.t m.,

~.

.. c:,.a. ;..

w.c.

. ? ~

.~

g*;*.).., W.4"."; N,

~.. 2 -:. * ~ *,q.. i......W,..d..,; Q, '#.M. 5,.

.... -e,-

I f

W

?

2.. :r. -.

<3

• ~.'

&a w

'r-

. +;.., 1.

' ELL: Lam

.y r.,

..s.,.

Accident Assessment Doev~staties

. 't.

.w.~

J *';<:,i. %.

I.,s...s*7 M.p '.,f-g hr;g.,/,, ;:, 3, g, ',/-

..: a

. s.

\\

. 'r. ?..',. -. ' ' ' ;h.

'}O*

W Lt 3

' ter.1oeura h$. ^>kyc*.e ##f.n'.D,.,y,inl.kW;.s ',},;:. &s,,*

t el

(

• ~ -

' * * *,(,,

r /-

J

'.:*.A$;W*'$,..Q. g &.. ; n,,....,. ~,... Q,b.\\.-1,

~'

r~~~,,~

! :: z. -

.l

., i '

\\.s,..s.

-3

%}

' ' * : &.....s r \\ :.'>r 't ?. Q, r.p,..

7'

... - *... 7~..w., r &

o

."i

s. "'",A.

+,.t.o*.g.:.'.

.e' *~. '.%:L, W, d,..,.s. 5 3; y *r:.'.w.n&'4;.4.-

g n.v ;.s lt.;'. '.'s'.g,?.,<;;>V

.c.* v. f.'a..'y Jr..

9.s *::.g :..

r, ;.;s., s'. ;,.............

• l " s.

A. + * *

~.......

s-t"'.*

~

• .m

t

.=*h-

~

v.

i s'.,.';

a T

~,

=.<

., ;?. -...

.M..,

2. -** *.

...z 3

s.2

.. 4.n.,,n.r.... v s,., W.

,.)>,.&. w ::W....

.,.a z

.v.~h...

2. M. s...'e n.. g. 1g <~t ;.., ;. n.

..y

-. V. \\....

• s 1.:

w.

.A.

.o

.-....s.

. ;.:4. 1.. y.,....,. t.

.a

..:-P w

..<as,,

ei ".n,

. a.y.,.

v<t -

.. c.

w,s~..;.+..

s

.m w;

.<...,.:.2....... :.~. L.. :,-

,,.. ;, s.

.v. t. s -

.,.....'. i ;,1s.. :? h....

n.

w....~

.4 :

,o

....;.: p c.

,.s..

.+

r.

y....,..... e. r,.. s.......,. s. s.

. z.g,

v.,.

....r.

t

.r..

...:s-..

y

..v.,.......

.,.. ~ '...

p.

. ;.... ~.-

... a. y.. :. ;;

..g..:....~..;~<~...

e-

...~:...

8%.

1;'.,*

7

.,,. ~

.a.....a.. '..h....'**...*

L.

,r

. -J

..s.s 1.

t*.

.r

• "Li.* ',......g[

~4 a

g

\\

NI

.Y[,'

2n]

P **

m,

. -. w.q,....

8."

s. );..r.

.g

.s

.. d.;

4g,-

(f.

. i g.: c ;s,.r,...

.v

.......M i.jQ l

.a..t.

A GPV 5swa Coxncos e e = e=.

=ry cr Co wir sk w:

U' 9.

,b Wses C.:r;xmcri i

h.s3-,

% f..;'h..,..hn.. :7.$. 0_;..n

.c J

t

~*1. *T.e.., O. g C K.

(:??I;~

. L-Q tsx.

g%

Lgp*,r.eZ. J',,".'% % M.3~s Q\\% N 1 i ;.. e o

.t....**..n."...

,e

..~....--

(.. A.,.r.m :.s r

^Q=-

p7. ',. ~. i.'.'. Tu', ~ ~'.1.C '"I ' '

• i

.M

~?'

f.

.a m'

r.3

.s

.?'

o e., g..

n M,g 's

/3/3

-f..w.y1*h e

- {*i*r n

c.

1 4f.'.****

3.,. g,..m -

4 r

' * *g % : w Am*.

• QWQ:.=

Q

~

• • &d.?cW h X

.Q

.d

f. ' --

.- - ~ " * ~ ~

de.(.1 -

~.. - ~ ~, -.

4.

~

p rxqumIT C XI P

1. ~

r.

.. 3 r

-se ed-m e-ro o-w w-yh sd%yQ-f

j. ;.y r.

p-

-)

i %2'fk

. i' M

- g.ro.

.,.y n

3D ;.g j

y..i

- +

St?~.12T cf PAJet /Yt3T5 ccctJ12 CV DAT 11

.a

• 7'"

y. "M.:g" Frammarizar Latel Transmittar (1C-1-t.I3) failed.,The operstar ecm x :

e t

1 S W-E

.$pl. W ;5, Imergency Procedere EF-21. "Tetal 1.sas of Pressuriser Level L-ditatics* t.

fpi q. '

, de eev.s.- 1eser.,: -l.. i..

..*-t.'.,..

1

.2

.t

. '...::.R. ~. 4. -* **. '.G.

?. ': '::;'...:. ~;;;n,.

.r...

? "..

.qi...,Q

.*,I..'.

~..

s e?~ % p8 y

- ;~.

t~..e

.c 2

.? s ' ;

n s,,,

2.

i *h."$^Q' R.=&

13 proparaties for natura!. tirenlaties. Stsee Ceaeraeor 3 vae s ama d :e

} p. J

.~...y;b...

the eandensee us1 g t.be Tutbine Byase Yalves at 132 open.

&h '*: *. -

s Dn te this

+

E,,*y. 7.'.g,' 2 s amais3E.increasse is, air'berse astiasetivity were dataetad.

y'*"

". p #'ga.}!

taspiraears wra teguirad la the ceseral Emen ier savarsi mise as and 13 w-ehe *urbin f

ha114.1 g f ar, batrees thr+e 'te four bo. irs.

All enaseeassary pr:ec=al f',.y,'

d were evacasted free t'ait 2 Centrei and Turbine Buildings.

.a., y;Q

' that the activity was mostly Zenom 133 with triese of Iance I.E and 223

/

Initially it was

,y-j thought tist the high airborna activity wa m

Iodine. La te r o..t s s hc%d

. g, - *,,6

. >. t R's

....e.

.:Cu

. dich had saturated the $1M+1 detectors and gave a false Iod.1-indic.a tien.

~ r

.t.

. ',u%a.

..: y. a

/:.,- Y ~'s.:.

.;;i..... >,, *

). *;N,,) $q

-1

• h4

~'

transities te saenzal circalatime.vas aeee.ptisbed ae 14c.a bours )y

.1;..'D.2 aeopping laacter Ceelmat Ftsig 11 (3.C.F-11).

3 eas ceaeeseors A and 3 veci

's s

'l.e,.s s.,p 17 c

g p

as.4 to pass steam to the seedas.ser thremsk the Turkisa 2nas. Talus' ~.

E ;~v.. ol,D f

s -~

-- ~

~

7,(.

015-7111, :6A) *1ch wre 100 2 asdT:

F v.;. 4.e epee.. resp et.ively. :'. e:r al f

Y

.}.

ti-culatioeld Milt'ws at 3' T per hour west seenhly w* th 4: *

.a

..~.

e

• p f'n g a.s g.J: r.

na *

.-8'

.... a and n

• Aaf.. ut415-10F ituaz:isg rate es*3faas Generater 3 t.*e C f'.s.Q%..

, mitiNr.1r_.iner asad to arpre=1aataly 4A7.

1

~

EM el

~ X.

s.c.use f th. 5 :

4'*

~!..

=-

}L the Prass

~-

er and 3tsas C4:arater ind instrumentaties t.hr ::usitic.o to g" ' aw%_;

a-

1. -:*:.

2 m:. a.N1

. - s g.

1 naturs1 tite:Lat.ies uma initistad ahead et schedata.

=

. a. i..;-

q g.*

.r-

} e 3,,

g T

'setst dT and C g

3 represent the teeperature differsece screes tS.

ris.try sides of Staas Cecatsters "A" sad *3", respectively.

)

W

-i

.e :

1.

I

.r r4, a

-r w

.t

.y..~

s -

-.@twg'n 4.1l..

a"

.ff

.\\, g.

T;';

67 i,.< ::..

y, I '

(y..'...Q[,Q; ;%i. _FQC*??-k- -#!:W$5

^F

.-E i

g c

& p%. t 6

....Z.M,d:

~ :~- - ~. - l.. %.,. : = f *

- - - - ~ ~ ~ -.

~

~

- - =

~.

-*:. gf f /3/3

' }Q;~..s. -.,, t a.f. :..

.r 7 -- -

1

.g r

.e Q

~-

~~'..s,.g*

.\\ ',

1,ww,;,

v.O,".r c;,,.

a w-:

9-M.e,,:p~ ^, - p L.,

~'

4..

2*.

.. =

T.a' ' -

.~ r.,_M... _: r%. :.. -,

.... n

e.../.-:.

.: e.

w....,

-a

~.

4 4

.,/** %, <..... ; n.. '.v%.'ss% e...

e...,_

... r

--T

,m..-

- - - - - " - ~ " ' ' -

.-s,-.

~

. a a

~

)

..,.1-i s 44 04/*:/79 3,v. o

-. s.;r a

...,G...

l.

04/:3/79

[

tay 22

,,.t.,,,..N. -

SMART OF ML:CR T7EN*3 OCC"11.*. **: ct DAY 3:

6

-7:.*.'#.s t

.E.. 9...g. q At '0110 howrs the Turbine Dypase 741tse for Staas Camerater 3 (J5-7 *53 and 1.

...Nfip.t 5-r < * ; M

• E3) were isolated. 2his was initiated when the Station Yeat Radiaties

.. J:

A.

J.'s..8.%,r.6 5

Mesiter EF1-21.9 increased. " It was later detarnised that the is.: ruse was i

.s.... e. i u

.M.r.. w*.,,

Q due to changiss the charasal filtars. *his was scheduled to be dona at..

[...".y.$.

o-uWaight (CCCO beurs), but due to delays it was done uomad 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />.

..s

'.'T*r

' #!w t,...Q D

a

.. e s..

.... <..w 2.

Pressuriser laval was being calemiated using Zaargenc7 Procedste EP-21

.~

.. -.,.q..

~%.,,c 7et4I laos of Frassuriser Level Meaties." This value was bais ccanarad e

with Pressurizar Levs1 Transmitter (EC-1-t.T3) vttic.h was bac.k ir. serr*ce.

r

.. :9.:

L ~,7,,,'-j

• 'he dacisies was made set to use the back-op Inise gauge due to 1 s poor

..a "W

• . ' 7t r....2...

cerralat.ies to the asasured level..

s

~ ~._: :-)

...:..-7 3.

y

-Average taaetor Coelast tamperatura decreased from 182F to 17.'T du. ring tia

- 13{.v, -4

• i,..-. "5 day as natural airen2 Atlas testianed..'.,, - d.,.,. J *. g. " ", <f.,.. N;.

r,',j~.7:3 g

W.."!; M.: J.9....

1...

I a.

,? %'T,.'.~7. % 5.! N ' .5' 0*3 4.

Apprezimately 2344 ga12mes of tocar sqnts added to the Mahmup Tuk (3C-T-1).

. g.. %..

e m

..p

w..

..r-

...:._.., :...,.t3

. c :. _.,. J,*:..~;.................

... s.

. ~

.....;...,. ?,,

. =. t

.y

....."..x.._.-.X.......y.

.; a.,?.;

.. ~

....;..,,;,,7.,.,..

... ~.

s.,,r..m.

m. :............

1.,.

g.%u 4

a.

• a.,

.. -n9_.

.....,........ <,j...~7:g y,,.. ;..::v4...,c..,

.t.

.....J

.,v,.s.,....._1.,w,..,

..w.......

.., 1 s.m. :.e :.

.w,

....,,.. t

.......*-...s n sy.:.g+,.

....u..,..o..-...-

r.vi-..

s.

s J t;%,.

.. r..

.....e.

.j

.-::s.n: w.1-a.:: w...-w.:.i:

.,9...-

.;;.,,.L.,g

.......c.

w.wt > &+..e*W:...e :X.=.}.r :* ^

2 i..:9 c:; 4.. w. M. n,.,.. :

. %,. v

=:=:. p..m.

<.

:y,. r.....a. v. :. '... '.'

v.

.4..,. 4.. g) m

...;.. eq:. n:: + %..,,.4.

s..

..-. -..m-...

':Q....

.m~ y::),,s.

..,,:.=>.

wn.:..... -.. -....t

....-c....' :. ;::.,:rt.+,u..c.:.n.. z.

,.s ;: w <.. n:m...,.,: c,.y..y m....:.;.

y. :. >.. u. n.. *...

. qq.%

. t:

..:.y:.5s.

p g...v.

. s..

w.

...., e.s.:.t V... -e =.. a. s..

,.,9..... e.....

g

. =.

...t..

..,.. =

~ r*C y

...a:..

c.

g

...,,.. e.t ',;,..-*

s-

f. l.;,.g $.. ]

.,4 6

4

"*E

.* l.

..i.".*...,

g

,*; ' y

=-l.Y..*.*. '.0* *.....s..s..'.,...',,'**.'

l,'.....-

. t...', %p

-.i

.J,

. C a n. e*

s

, "t.,,; "..

....et.

r j.

-....: > o ' -f.l:it. >-,. = :..

4.

y 5

3r.

...'.:..., A

~,.,.7 y

-J-

• s*...

y

t.,

.~,1

.v

.,., 3 1

-7.

.3 s

. ::;. ~

n.--

s 3 e

,. a. -

...I j

g

.A~~..,..3.m.,.. ~.v... m,,; ;.,, q c.

r

%,,,. p.a m = -- = c'**

w., cc b

r,-

l t

H

.S

. %a R.. g e...; -

, lh[

+

a;._ -. :

.}...L m

..Ib W. & C;'m=~~.e'T.#.;;

.l r ~4ta.

d k.L..,

..d 1D. isE34.7.-*.,._.. M q,.[

• F.

.. z.

o em. -

. - ~. -

wc~

• ar1p -,y. m.Au sr

-t.

Pfi.

w.8.-

y!

t.

u.

.. 4..ls*'e' 4,.r,

- es ar'e>

..q.

.*a.n

._ L. C.~.,,. ;.

.. . G.;,' ;..

~..---*n--T=* n-.

. % *g,.4,;'s,:. -

+

e

As mar;.9 UNITE *) STATES

[

j?g NUCLEAR RE%ULATORY COMMISSION

,y S

cEllON I E

'f

$31 PARK AVENUE S

KING OF PRUS$1A, PENNSYLVANI A 19406

~;

/

JAN 1 b 1987 Docket No. 50-289 Ms. Deborah Davenport 1802 Market Street Camp Hill, Pennsylvania 17011

Dear Ms. Davenport:

This is in response to your letters, dated September 15 and 30, 1986, to We have summarized our responses to questions in your letters in the me.

attachment. Your letters are attached for completeness and forwarding to the docket rooms.

If you have questions, please contact either Rich Conte (215-337-5146) or me.

Sincerely, LI 'N.f** '

Allen R. B16 ugh, Chief Projects Branch No. 1 Division of Reactor Projects Attachments:

As Stated cc:

PDR LPDR Senior Resident Inspector (TMI-1) bec:

A. Blough R. Conte W. Baunack K. Abraham pat 9lO 30T 4@'

ATTACHMENT RESPONSES TO D. DAVENPORT LETTERS A.

Letter dated September 15, 1986 1.

In reference to releases during a steam tube failure, provide copies of any evaluation or procedures that are available.

Response

The design basis steam generator tube rupture event was evaluated in relation to the Kinetic Expansion repair process for the TMI-1 steam generator tubes. The results of that review are documented in NUREG 1019 (Section 4) and Supplement 1 (Section 4), which should be avail-able for review in the Local Public Document Room (LPOR).

Specifically Sections 4.3 of both documents address this topic along with licensee procedures for handling such events.

Further, the licensee's method-ology for handling such events are being generically reviewed under TMI Task Action Plan (TAP) Item No. I.C.1, " Accident and Procedure Review." Recent licensee submittals on this topic should also be available for review in the LPDR.

2.

Several sections of the letter reiterate the request for a filter on the condenser off gas system.

Response

This request was answered in a letter, dated November 26, 1986, from H. Denton, NRR, to you.

B.

Letter dated September 30, 1986 1.

Comment on the steaming of, rather than isolating, a damaged steam generator (upon tube rupture) and how that lowers releases to the environment.

Response

If a steam generator tube rupture should occur along with multiple tube ruptures, the best way to stop the ensuing primary to secondary leakrate is to cooldown and depressurize the reactor coolant system The quickest way to do that within cooldown limits is to use both steam generators rather than other slower methods such as steaming one undamaged steam generator or using the RCS feed and bleed meth-odology. Use of the steam generator is complicated by releases of radioactivity eventually through the condenser off gas system or through the steam generator safety / relief valves if the leak is large enough to cause RCS pressure (if above 1040 psig) to be applied to the secondary side of the steam generator (relief valve settings at 1040-1100 psig). Releases are inevitable but they are within

~

[4 2

design basis limits (10 CFR 100) for the design basis event (single-tube failure).. The licensee is also prepared for the beyond-design-basis event (multiple tube failure) in order to minimize releases to the public.

For any of the events noted above and those releases,-

there will be a dose rate to the public. The-licensee's approach is to shorten, as much as possible, the length of time to stop the pri-mary to secondary leakage, so that the total dose to the public will be lessened. This approach is under generic review by NRC as stated in paragraph A.1 above.

Briefly, upon detection of primary to secondary leak rate of 1 to 50 gpm, licensee procedures require the plant to be shutdown and_immedi-ately cooled to below 540* F (from the normal 579* F); and an orderly cooldown and depressurization is commenced. The affected steam generator is isolated if the off-site dose projection approaches 50 mR/hr whole body or 250 mR/hr thyroid dose rate.

2.

In reference to day 32 after the TMI-2 accident,' Ms. Davenport asks that,.if the turbine bypass was isolated, would that mean the "B" steam generator would be isolated totally with respect to releases?

For day 31, what were the stack monitor releases at TMI-2?

Response

In response to your specific question about the turbine bypass valve, a number of valves in the main steam and feedwater system must be shut to isolate a steam generator; e.g., main steam isolation valves and feedwater isolation / block valves. Even with this isolation, there is a possible release path from an isolated steam generator through the steam generator safety / relief valve, which could actuate auto-matically on a high pressure situation in the steam generator (at approximately 1040-1100 psig).

Even with the design, as noted in the NRR letter to you dated November 26, 1986, the TMI-I design meets the objective of 10 CFR 50 Appendix I.

The TMI-2 accident and subsequent days after that event have been extensively reviewed and evaluated by NRC staff. It would not be an appropriate expenditure of NRC staff resources to revisit and answer specific questions about those events unless a new safety question needs to be addressed. Your request for a filtration system on the condenser off gas system, has been reviewed by NRC staff and answered by Mr. Denton's letter.

9 1

o t

i.

3

o

.P 3.

Are copies of my letters being sent to PDR's and service lists? If not, I am requesting that they be sent to all lists, etc.

Response

All of your letters to Region I are being sent to the POR and LPDR, either separately or by attachment to the NRC staff response letters.

Any discrepancies in that regard should be brought to our attention.

-With respect to the service list, it is not the policy of Region I to serve this type of correspondence on the Board or parties.

1

.