Text

Forwards Update to 860303 Commitments,Including Relocation of Seismic Instrument & Procedure Enhancements.Temporary Change to Rev 2 to Operations Manual Off-Normal Instruction ONI-D51, Earthquake, Encl
	ML20205N312
Person / Time
Site:	Perry
Issue date:	04/25/1986
From:	Edelman M; CLEVELAND ELECTRIC ILLUMINATING CO.
To:	Butler W; Office of Nuclear Reactor Regulation
Shared Package
ML20205N314	List: ML20205N329; PY-CEI-NRR-0452, Forwards Update to 860303 Commitments,Including Relocation of Seismic Instrument & Procedure Enhancements.Temporary Change to Rev 2 to Operations Manual Off-Normal Instruction ONI-D51, Earthquake, Encl;
References
	PY-CEI-NRR-0452, PY-CEI-NRR-452, NUDOCS 8605020088
	Download: ML20205N312 (12)
	v • d • e

, , s.

THE CLEVELAND ELECTRIC ILLUMIN ATING COMP ANY P O. BO X 5000 - CLEVELANo. OHIO 44101 - TELEPHONE (216) 622-9800 - lLLUMINATING BLoG. - 55 PUBLIC SoVARE Serving The Best Location in the Nation MURRAY R. EDELMAN VICE NIESIDENT NUCLEAR April 25, 1986 PY-CEl/NRR-0452L Dr. W. R. Butler, Director BWR Project Di rectorate No. 4 Division of BWR Licensing U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Seismic Event Evaluation Report Commitment Closeout

Dear Dr. Butler:

This letter updates several of the commitments originally made in our letter of March 3, 1986, including relocation of a seismic instrument and procedure enhancements.

We committed to relocate a triasial spectrum recorder (D51R170) to a biological shield wall location allowing more accurate recording of structural ret onse.

Installation is complete as described in Attachment 1.

In the same letter of March 3, 1986, procedure enhancements were described to improve definition of Emergancy Action Levels and interpretation of earthquake alarms. The content of this work is described in Attachment 2. On a longer term basis, CEl intends to evaluate other procedure enhancements which will be proposed to NRC by June 1986.

Further closcout and status reports will be provided as other commitments are fulfilled, in addition to monthly reports on geologic evaluations. If you have any questions, please let us know.

Very truly yours, M

Murray R. Edelman Vice President Nuclear Group MRE: dip cc: Jay Silberg, Esq.

John Stefano (2)

J. Grobe Q i 8605020088 860425 O PDR ADOCK 05000 l A

i Attachment 1 PY-CEI/NRR-0452 L RELOCATION OF SEISMIC INSTRUMENT D51R170

Reference:

~

U.S. NRC Regulatory Guide 1.12, " instrumentation for Earthquakes,"

Revision 1 - April 1974 Seismic instrumentation requirements for Nuclear Power Plants are specified by the referenced Regulatory Guide. Item C.I.c(1) of Regulatory Guide 1.12 states... "one triaxial response-spectrum recorder capable of measuring both horizontal motions and the vertical motion should be provided at ... a selected location on the reactor equipment or piping supports."

instrument D51R170 was attached to platform structural steel directly adjacent to a pipe support of the RHR piping system to satisfy this requirement. Due to other attachments to the same platform steel in the immediate area and prc31mity to traffic, significant interaction rendered interpretation of seismic traces on the instrument extremely difficult.

Instrument D51R170 was relocated to a rigid bracket attached directly to the outside steel face of the Biological Shield Wall of the Reactor Building, adjacent to a pipe support on the Residual Heat Removal System. This is consistent with Section B of Regulatory Guide 1.12 which states in part, "It is desirable that these strong motion accelerographs be located so as to f acilitate the engineering analysis of the recorded traces following an earthquake." The relocated position will satisfy Item C.I.c(1) of Regulatory Guide 1.12, and ~ill enhance engineering analysis of any recorded data by reducing the possibility of seismic interaction between structure and attached components.

The attached Figure A shows the new location of the instrument. The instrument was ralocated approximately 15 feet from azimuth 238 / elevation 630.0 ft. to azimuth 201 30 min / elevation 636.6 ft.

Mounting details are shown on the attached design sketches. The instrument is now supported by a steel bracket rigidly welded to the Biological Shield Wall.

The bracket is designed to be well into the rigid range (i.e., fundamental f requency significantly greater than 33 Hz) and thus the bracket f requency will not influence the recordings made during any future earthquake. Rigid bracket design, coupled with Jirect bracket attachment to the massive Biological Shield Wall structure, will insure that accurate structural response will be recorded during a seismic event.

1

Attechment 1 PY-CEI/NRR-0452 L FIGURE A RELOCATION OF D5iR170

!b%.Wo~P *

\3 .. .:35.rk: @l

'm:Msi = ~ m .> m 9 ;. ~

%@=a=G o aU %

i . ---

s#

w . p g$4'%*, ).e gL.fr<

8 -

21 !

~.. ww

(

3 a _. .. w., ..

wh' .

n

.y

'N? ,fI M'I d- .

-. !ji at m%

eo, lt ijg EE ,,

=u_ cfduf %

n

.d . \ .) .dQ

I3

. .. n^

- , ,z,;,,/h",.-

~,

,. /g. ;&'Ym 3.q . . .

-:4 .

'~

',, / ? . _A i '-

r., _m 2)l mu--'h,.h'~~'Q' ~

V}, 's i ,

,,,,,,,,,, I m=* - ;.' .. .v ll

-,-, , , , , , a a IMe- }f= --

a .

mhe' mera 1 -. I

' Mewl'LCCAT10d

'o! D' Locmice p :.r - ( ,

,,,_, i 1 / _

'TF. [ ~ ' - * I (kh w K.. LT _. %. .

\ '.* m/t j -

. ...N~

g *f_*

E1*3 IE1 p.=.

_; I g - - -' p f f. L -l$ ;,W-

., b:*l! - I 'lE 2,: p m e.:d

l.h 2 E @ Z k_ Wi[G [

jd.R2X$l" Qj]

. .::- .c I,3 t'** l e*t st4 ** ? i tr ea!L l

1

2927/26-3474gr'A

- fnQu 0f

0 / e.f 3

-s .aio. ,,,y,,

yo dil 4. u t *pa', po. - l t asIh 34

st ts N S ( "} A f*?

^ ,

',Y ,

pb /4

)

4 o

3 ,,yxg.=>;t%',x 'o. 2' o t

4 Ni .

j yg.p6 2 pre . ,. .

3' .,

sferioH k-Y N,

A7. 202

d4EF.)

m . , n. ,..

t .

gae jnt. D ;

$scrNort it ? "4 p ,., ,,

, .,_ y ,,..si.. u - .

k'UN* -

XtsT.' fiPK

=

n l* sxisn l t

Akrwa,-\?'){ j' l t i\xe,- u7sz$ ek'Lwo al Q

I i ,

% fcidrya<e s &y/l/ - -

y f f,'

cj ~ /-r '

.s'. e f 'tD ,e

)

1 l **- P I

%,, +! \

g o 4

3

" ,pv l.Y. .*

}"m "

, .SkWb3"'"

,, '1' ,, .. y PLAN t

_ _ _ . _ _ _ _ . . _ . _ _ _ _ _ _ _ _ . _ _ _ . _ _ _I_ _ __

O ,

gganwu2m

~

g L.A

, )9.2 ep 3 t 'l,T'd' pm. c4 f<7 L 4 Waws* e + m g .

e

) \

< l-ryp*

Sg fggyh 4

% )

w -a< -

g

' % f3be" 4 - ) i e.

.SEcriou Y Y.

Y

--- .a3.. 77.n . ~' iu. . . -tw.6-7 .~ 4

- m. w m . . p .-4. g g ;.;.. a. .: - 4 u

...f:.. :

.a..... g: ....

19;. .,

g -

L77 g gg .

EmWEERS L.

sunwesents'

E.RRthucMRungtPAMT N

-'r rytt,c w o,fst ,; m. m.r.: 3 6EETC8.I DE: REKcY6K N5ri sE15MLC._PCKEE'~SEf.MQIM TeT

'i "

BATE: af i sfsb h r: %

l FIEn n'E5coK: 119 P37 1 O ; - '

. 7 ge . . .

goo . . _ _ . _ .

l j.

.A . ..

@ s s s CCNTE R. Polqr a

a e' -TANCETS ~ USED~- f

.OM. PLATE y !

v i y(Qg

=-

(ESTAsusnl By oTasa:s d o

,_ w.;

O N8l'S7's l ?'*

l.NSTRO 064T ~ ~ ,r A 16 0* SETOP % ir , l f M

.'es. E E.' .h ~

ID C d

Q -f ~ Y .

-. $14 - GG 3 - 910 - 86p 2 $ h " ;j

~4). T.

M.]l. ',

.h':Oo2/, (Wf 4 f'.

c.. f 39 o

Pt. Au r -

M

.14 m p 8/o N/6CD 7

I Wg.

lo

.Sunyky !E CE M6C

, _ L'ac / .M560 I '*'[ p .

, l e T.y &gO a

g g *

so N. g..g io ,p0 W e!g, % % <S BUI m p. 6 I .: -

s -

/ S E15 m i c I N ST. 7, ;

E A.sE. p t.hY G. . si,i:

.bg . . . -

gord k .,O i . e 1 {\fi0 Wb **WN h, F.Cib.

ms .'x Date

,F 4 i

N'. ;) [:- ,

~., ' ,$ N, ,

'I ? -

Attachment 2 PY-CEI/NRR-0452 L PROCEDURE IMPROVEMENTS Based upon our experience with the January 31, 1986 earthquake, we have identified a number of improvements to out operating and emergency procedures which will facilitate response should another earthquake occur near Perry. The following provides a discussion of the nature of the changes we have implemented to enhance the operators ability to identify associated earthquake levels and emergency actions. Completed procedure / instruction changes are attached.

EPI-Al " Emergency Action Levels" has been revised to better define the indications used to establish the emergency action levels. The revised procedure utilizes indications from both the Kinemetrics and Engdahl instruments. It clearly defines emergency action levels associated with the specific instrument indications available to the operator.

ONI-D51 " Earthquake" has been revised to better define the meaning of the various alarms received as a result of a seismic event. Specifically, reference to the "high" lights has been changed to refer to the " red" lights which are indicative of an OBE exceedance. Section 3.0 - Immediate Actions -

has been expanded to include a clearer definition of what constitutes exceedance of an OBE (i.e., receipt of I or more red lights).

In addition, another instruction is being written to clearly delineate the procedure for obtaining early quantitative data from the Kinemetrics Instruments to allow determination of the exceedance of our safe shutdown earthquake (SSE).

As indicated in our March 3 letter, we will review the basis for seismic alarm setpoints and propose appropriate future revisions to the NRC staff.

.1 , ,- w . . ;. -

., z....' $kl .'.c... . l. ,{.he 5' h.

' ' ^

i' T2 O ' . . .;

f.h, !

, . ~ , .-_.

.~ )

. .O. y.--

9- .

. ;' ,y

-r < i . . ::pp .

y pc,w+

s;<;,3 ,n r. - y W . cPmi{ me

't-

- t y;: . < - ,'

..y e

( _OM15B: ' EPI-Al C,

~

' - 52 l ]. ' P+.1. 4 9 .

2 l

- . . 2 - ' 'd ' ' . Attachment 2 (Cont.)

T .. ; L. E Qh.W~ *r: t h,- T. ~ I .

t.. f. HaIEgaL_gyggIg ?? O,. 3.,'

.g r~ , .' ,-

. **.. '~ w: 4' .

~;

, ,e .-

p.- t, .

. . r-*- .=-

)iti,~);iJg.'

, y 0 . ;. , . .

. _;99EDIII9E_9,IP y,6 '= i f.:. d ,

M n;.rg .Wy .3 g.y . + .g ..y. :,wpf- .-A.";

$c. \..n.,- w. IHDIGAII9H . .

4;. M i f . I- EEEEEak_EyEMIi<"l't .k :c - Ni JH. '. ,

. 25 ..,

l -/ .

r. %- -

c..

..y. .,,a,... . .c. .wy y.... .,. - '. : w.w o. . . - u -

.o r -

n , , .

. Natural';; phenomenon' being?. . ,. c1."a.NAnylearthquake detected'at 7

1. .

s' - expeFienced beyond normal- levels above that'which is ly observed levels. . . . . . .

normally measured, as

. q. indicated.by:jlf77. p. e..

.D. -

, J .' s l' $ S.;a. .gs#l. @s._ d%Yb.\ ,r u.f... a ;,.w,

,, - 7ys..c;m

n. .a

- ~. - - .'

-s . -a .

<.'1)

. ~

. . a. p.' ' - Control' Room receives

.* ci q' y 3 ;, , yf . 7; ...t. ,

r.

reports from plant.

v .

. q. ,f..-. . . - r, 7 . ,_ . . , e.s .. .,, ,-

,.. . personnel'who havu felt an

'[,[** p , ?

"'-.-Llf;i ,.FJ

.... efi f .;; , .?; earthquake .on-site; 7 c.

. .g. pyO}j,.p/hS;'. 7+

-s > : -

. r; ; ' ,'*~6. y.r _

. .y. _

,' . Q.1

%. ":: .; . .pp;i -t..

2)a) SEISMIC y. MONITOR TRBL 3 i: ygg o, ., .

g

.- . .i , .,* . .

w...~ .

1.. .

.y m ? c; .. ,

, , 3. ,

ennunciator on 1H13-P680; Q -'i'- E..; .,,.h.-

^.cc.

, ~

9 E ,:,. :

.b) One'or more AMBER lights g X .

^

e -

on the' SEISMIC MONITORING

~ PANEL, 1D51-R215, on 1H13-P969;

. and

3) The EVENT INDICATOR on H51-PO21 indicates white 5, ,

(located in Loose Parts Monitoring Room).

QB

b. A tornado is observed to cross the site boundary (by evidence or observation).

98

c. Lake level is below 565' USGS as confirmed by the U. S.

?,,' Coast Guard.

98

.. . d. Ground water level above 570'

- USGS as indicated by local indication on piezometers P72-N100 thru -N150.

98

e. Sustained wind volocity above 70 mph at 10 a.i+ars as i r .f ic-eted by meteorological instru-m,nts.

t O__ R

^

g g' .

ae .- -

T ' ' .

l--f ^. ,, _ [?

~ ~

~ [&pe ,(

r y - ,5 g,

. g

-[ . .OJ 3 OM15B: EPI-Al 9.b

~

Page : 52 Rev. : 1

=,. .i -

Attachment 2 (Cont.)

M-.

4

(' :l

- e :t.. +. ~;~~

, yaej59p,,

,'. ' _ . H6I!!Ba6 EYEHIE!

~

, y: . .- < s y n,5 . . ;. ;

M; .- f.~- S ' : '~

.1

- ' W " ?; , 4 ' * * "

INDIg8IIQM

> r /* i lJj.Vcq - .;V &_:n, ,.xgggpIIIQH : -r.

-. : - . n :,:,,>". , . . -. - . . -

3 s.

..T .. . . . ;x. n:. N ' .

.,h.%^ .yy* s. : .-

Y' W.h

(.; ; g ,j 8:s. f-Si.' y't 10.'(Cont.)- '^

.'lg .-e k 'N4 E 1. ;f.',:y Average ' ESW '(basin) water

~' . . . ', .'<' - '

~

- : temperature greater than'80F E'

O

,' : ^ s- as indicated on H13-P601,

-while the system is in - -.

.%y y #, .

?l..: . . . < .. .% operation..

p -

n .. ,

r~

..i:

.m m&... c.

-:- a.x;;..x. ...: .+

.a

. y. _

h.7, .. . :: 2. -

. . ..... .. ... . w : n .-

p .c Y

..=,;r ,. .- s., . .. .

?.

11. ALgBT , .2,j. ::. ;

y- y;~ ,D; _ . . . . . _-

):'".Y*l %;I;hM M!n'l.YOSSil.K.Q r!%

8.l5

~

?. -?> W .i ~;$.T' + &W,':', en-

- 7' '

1. Severe natura1' phenomenon 1. 'W'a .~ Earthquake.' above Operating g

' f ,.;'. .$ being experienced beyond g~ y. . f*;' ',,'2 .'2 .

"E- .

_ '" Unusual: Event.."' levels. , . ,.as. Basis indicated . (OBE) by:. -levels of 0.075g, nA- . ;, ,%.. -

, . 4: . ;

'i -

.~..

" t, G . ", y, , y -

-( 1' ) a ) SEISMIC ALARM P969 annun-

- [. ., . ' N, ciator on 1H13-P680 -

s' A alarms; Sud b) One or more RED lights on the SEISMIC MONITORING PANEL, 1D51-R215, on

~

1H13-P969: and k' .

C. : -

. c) Control Room leceives M

. reports'from plant personnel who have felt an earthquake on-site.

9E 6'

2)a) SEISMIC MONITOR TRBL annunciator on 1H13-P680

%k '

alarms: eDd

. b) SEISMIC SWITCH YELLOW 7 light illuminates on H51-PO21: gud c) Control Room receives reports from plant personnel who felt an earthquake on-site.

98 !

b. Tornado striking facility. !

QB

c. Lake level below 560' :,3 a s l confirmed by the U.S. wuc t

( Guard.

98 1

P+

ss ,: a ::,:: : r:- . . . . m w a ._ ,

e j.

( ,' he -? [

4.= *:

,-.a, a y

J5

+

ex 3* _ - _ * ,4 ;

A.

., m .,-

,4 * '

> ~ ts:se :t%

W'&** w e' %' . w ? . v+ - .

w

.,Te .'^e?. h -h, an

w; w..'.~:"'$ < h'T + ' k hi

[ f.

^ *

~~ .a -- .m * - p':.7l, ?'~

g"r,Jr_ d vg';.e. -< ~~. '. .g'h F' igv'c.+. . ,_wQ :wn, *?M-M p e f ,M' &n,Ls_.;$ g

%.a)* ~ W %3mn/.v - -$ TQ< ' M Q

-mmb .w '

-x*t:j 2.', e. . @ .- - . _,&~, _

mu wa --

n. e';q-J "tf=3:.- ms

.g*

Kg*,! , y op.* _ ]* >t.2- ' t, n :. = f.

3.e, p-l- -

% ..%s. .6 '*.

x . .; "., e 4 *a ,t.

. . s.~. , ,

$Q *

~T *l lh - - Py .S n.,,.= ,ce, N . n&fd*' ***. =. w' w.+~;w;. .-%-

? .

y.o

,. a-1.1 s ,tas.cana,

?M m.~y~;n.-: . . n- y.<

u . -;

,r~ .__ ' %y z.s.

a.-p,.at;. w - - . .-m _ ny Wr .

g, e.>.n'3j.

_- w w ,:,-..._,,,

~

-w.n wn.,ac.

sm

, y; ,,a,s e

. * ? . ~' Y hw *S* *

'***", ** % l *

,$.- : e$ ' . e's * ," "

ww.;;li ' v =:= :r.*:.ac:m ws*w ;,;,:.::.aj S' l_-e- g-- .m -

+ ,..;.5.@.;.,.

t w- nesy - .:.f4x

-sh,O4M,, ) g$.qe w. M14,s.:,;:s

-~ 2 y _. & m%;4%' "_d ...-n _ pm .:w.r. :. : 1. m :n : O.c r - ug

2 . :, r ~~~ ~

. r . l- n:.=:n # .::wg-mi- & 4: 1 s%s;its

';u w.w;1 ? w%w.%

t:.r%stw.-w i.1

~ M +ww 4 sn.+ m%v- W ..:"-cmc + M C;: wm -ym;~%.

W.. 3

s W ~+ eF g ~. 0 . L r: ;

r

,a .s -

r w- .s.w.;.%. . w.y:m:n+w& .4;:me,, ; c. m,. ,, .,... ..u. 3,.g,tw.. e, . .n. x. n,9.. .t,g., s.3

g. ,..p; .,, ..m.aA w, i...n. Q :...n. . . .m7. :,m, 2";a ,.

w.f.-. . # <- 6 34 f,, e

, s . %,s ,, .:

n.::3,.g ... h.,.g. y- .ish . J - t-,4 a t . .- - - . -* ***; . .

6..A. n.,-;#;w.. -: s,h a.,-

t;.%s#

yw.v % .v. .Q. . :.t # .,.,]M,*%.tlf . , . . . . . . .. .J du ,T+.r. 'ai u%_k ,T,e.s;.gw#.... ",p.

s s . . L.. e .

t- a A,.,['

.. , h+ $p . , , .. w. . ,.sh.e ., a'#*-$

Y"_g

rf

~,

e

,u k'In pM. ,g. 'wl*j. ~.a/ E 2..Yg4PT7 4

..a .Wk .v[. asp.aw x23..,.x $t d. A 4,w,n ' & g.... -.+. _ ..

- . . k .y

.4fj.,iid:'21f e . ,*. 5%;-Q. fC:',,isKu%y,. y."reu?.W;t*p,*'y:.,I. ) 7:-;f,,.'.,* g.,.: w? & . v*' .L49,

.d.).Je ',%;k ke.g22 * ', WD._ .

-QM*^~.y . .

?

. %m;.._ w ,u_ ,

.. pq 1e$%. ...

. ,.a : ,.+,. -

m~ . . ,- w- 1*t .

. ,.z. _ r~ .*-p a m y.. --n .c ., .<

, s A '/

, pm .' '*

a - k ,

k5$%&n%

u:ra m :a.: %_a -

5E,2-\f:~% _a M?&v w._S. ~_w.k.%

.nu. . u m,m. %fs@2l%m n ,v, _.o,, MW ,.. ~.h

& % J Wn% ay. _t y.,

's

.x.

i? Porm 0n e ,

5

.]

97 OM15B: EPI-Al

,;. (' e 3cf 9 Page :

Rev. :

53 1

Attachment 2 (Cont.)

L.

HoIMBak EYENIE a . .- ,, , :,. ;

99HQlIl9H __ _'c -

' ' ilE919 ail 9E 5 -'

~ ..

. .. a :.

II. 1. (Cont.) ,1 . d. Ground water level above 580'

, ._ .USGS 'aa. indicated by local

_ ;f'-

^

S* ' '

indicationa on piezometers P72-N100 thru -N150.

98 -

e. Sustained wind velocity above 80 mph at 10 meters as indic-ated by meteorological instr-

..uments,

~~

v

.a .

. .. . .c C.

III. glIE_6BE6_gggBgEggy -

1. Severe natural phenomena 1. a. Earthquake'above Safe Shutdown being experienced or (SSE) levels of 0.15g, as .

.( projected with' plant _ngt indicated by:

AD ggld_gbytqgyg.

1) SEISMIC ALARM P969 annunci-ator on 1H13-P680 alarms; and

2) One or more RED lights on 727-the SEISMIC MONITORING gpfr PANEL. 1D51-R215, on 1H12-P969; and gg 3) Evaluation of earthquake gp magnitude from the time 1(kgfy$ history recording on gt Seismic Monitoring Panel

, jA H51-PO21 indicates levels

greater than 0.15g.

98

b. Sustained winda above 90 mph at 10 meters as indicated by meteorological mon.toring instruments.

98 -

c. Ground water level above 590' USGS as indicated by local indications on piezoneters P72-N100 thru -N150.

A CoutNuE.t> co p$e, 53o_

n.sa h

vi

-, e g ,

7 .5. .;<. .

3

_ ! enpor,hy ' bbl. l a

ccs~ -

{ ; .

keb q .

~ ~

OM15B:

Page :

EPI-Al 53a Rev. : 1

~ ~ '

Attachment 2 (Cont.)

l

. .. .q. ..- '

' L ,' . "?la 1, . .g . >', '. M5q,;. . ;y

~

H ATUR AL_E_V_E__NT_S_ '.i/: '

7CA/

.=- . . ;x-m . u.e . .

. ,. . ; .. ;- . . .c.

-T .v.',. c 7 .. bNDITI'QN',=,,, . [. " ' ~[

- ~

OOk

[

. n ..

- +

" .= ". '[.v- ^

-- - .. INQIQ6TIQ3

r. m

. .se-ss3

. - f ... ;

l- . . r 1 IV.' . . EEEEBak_EHEB91H9X, .w.c-<,

,y..p. -- ,- x w .- -

>_m ........

.1.' Any ma3or. internal or , , 1. As deemed necessary b the external' eve'nts (e.g.,' . Shift Supervisor.

~"- earthqu'ake,~ wind,-

tornados,'. ground water 't

.'.'" , i # .s .

level) ..w hich could *

~ ~ '

'- (potentially) cause -

~ -

' masalve common damage, '

3.h'_....,..,,' to plant.. systems result ... . 1, . -

.ing in,'any of.the'previ

Sj.. p . ' A.*-

ously, listed ~ General.,.

Emergency'~ classifications.

% s.

e 9

e e

$6 i .

e o

e G

e a

e e .

e,

PY-CEI-NRR-0452, Forwards Update to 860303 Commitments,Including Relocation of Seismic Instrument & Procedure Enhancements.Temporary Change to Rev 2 to Operations Manual Off-Normal Instruction ONI-D51, Earthquake, Encl

Text

Dear Dr. Butler:

Reference:

Navigation menu

Search