ML18087A951

Forwards Addl Info & Clarifies Several Items in 830228 Ltr Re Reactor Trip Circuit breakers.DS-416 Circuit Breaker Adequately Qualified & Will Perform W/High Degree of Reliability

ML18087A951
Person / Time
Site:	McGuire, Mcguire
Issue date:	03/01/1983
From:	Tucker H DUKE POWER CO.
To:	Adensam E, Harold Denton Office of Nuclear Reactor Regulation
References
NUDOCS 8303090148
Download: ML18087A951 (2)

Text

• i . . . .;

• D't1mit PO\\'=ER-*

P,o.*.Dmt 331M * ....

". . . . . . '** M:arc.h"'.1-..

1:98.'.J ""'* .* Hr. Harold: R. Den.ton.,..

Di"t"ector Gf.f'i'ce of* Nuclear R.eaetor Regulation*

U.. S. Nucl..ear Regul?:.toey

• . Washiri-gt.on,..

n* *. C. 20555

• Ma. E. Jtdensem._

CM."ef. Licensing 4

'Mc:Gu:Lve.

lfaclear Station, lJM.t:s* l 2. l)oc}{e-e*

Nos. 50-3"69*,....

50-.l:ZO*

Thi$: letter. :Ls. t:o pr.o\t.i"de aaiH:t:funal*

• ie-. response to NRC' Staff arid-' to* cla't'ifY*

several* U:ems in-my let:t'.er of.

2&,. 1983

• On*. the riiaet<ri' trip,; circuit breakers-*

A"ttachment*

l*.

add! t'iona.i . inf o.rma ti en** -* l"-1-eaB"e ad'l."ise-if there irre addi:tio:11a:t.

q_ue.stiOns.

.. tiii"s*

• Very: truly* y.oc!rs,..

CACf r/fiP:. Attachment*

cc: Mr. W-:. 'T. Grde?'s tmc Senioi:= Resid"ent tnspec"Eor Stat.ion.

Mr. ..lames P -o-'lleiil)* R'1g1onal*

Adm:inis.t:rato'l' tr. s-.. Nut:lear Reg_t£.latc..ry.

Commission" Re:gien-I.I lt>l-Mari-e-tta Street.,.. .. SUi'.te 2900* Mlllnt.a**.:

• 30303 ., --. . ..

\>I h. '7fp

\. ' .... */ ) ! : .. , .. -;--. HcCn:tre Nm:lear Stat:i-cm.

!nfonnaei-an.'oi:io Reactor tril!'-'

-. . ... --; . . .. .._

... \:. . t*

M"CCaire tlJ)"it l-a-ntf: UM:t 2 liar.!*!" Yestiu,g1\ouse

'fyp.e rl'r'ctait

• installed-as* re:acto-i::

O.u. 'l'.,. tesr:tng*

of h-as* been. performed in** aecoE'dan.ce-

'Wi t:h* tile techn-;kal

$p-e"Ctl':featians-no. f.aJ;,1ur.es . . have b.een*

.... nils-* testing.

1)" bi;.+-moDt.hly*

trip-tC?r;ting*

of . tne* breaker.

the umfet:Vo-ltagit i::nil** anc:t.**assO"ciate<l and-: 2} triP,-testing of the*

dur.inz-tne. engineeJ::'ed:*

satr.ety.

feature..

{l!SFl and. . pi;ot:ect1on.

systehl QIBSl t.ests. every* 13' alt:hou&h'.

not the tec:h.ni:'cd spec::tfiQations*

fo-r 't!ni"t:. liesti'n& (ti the shmrt. t;riJ?*'coi-1

fa also-perf.ormed**

testing* every-18'*

... on: Unit Z during. preoperat.i<tnal testing o£ tlle RPS",,. the. b.Rraker.*

iPtatus-:tights in* the contr.ol room indicated' that one breaker di:cf not open*

t'E.H!clpt of a td'p sig;:m1. Subsequ2.nc no apparent:

ress.on-for the-* f.s.:ilt:are t:o tJ::.ip* an<l. in. su.bseqa,.ent testi-ng the:*.

apen,el]:

a.s:

• . Pr:fo1" iri:tttn*

aad-ftfoa&i t:est.filg-will be .. perrorined.*

that: an* the r-eciu!"rernents*

are*

tlia.

• i. l:tc.-ett$e*

is i"ssuad:, tfie technicat speci!i.cat:ions contain-a!i of: tfze* *sa-me-:

as:-the* current-llnit l Technfea:l--$\>eci"f*i.e:a:t.i:ons-.

and ... ih:. addd:tioo.,.

\dl*l co;,tain-toe req'airemet!_t:

to

..

oo* "the trii" co1'1 every 18* mondiE>..

T.estf.ng t;f" tfle Unit;. z* nr-ea.kers WGS. la$t .:p-ei-forpie4-on* Feb.ruary 25:.,

-.. . . *-. -. *-. -.c. * * * * * --:..._ -. . . . . . As in.

hbrusry*.

I.9Etl' fon*er., the -tr.flt-

.. &te rela:t.ed de'\?f:ces.

Al1. tesdng* aw* maintens:nee*

are perfoi.n:med' us-ing .t£P:Proyed*

p-rocedures

-!'he maintenance for.* tbese M-eaT;:er.s consi*s:ts of .

repair :OT-(-as nef!essal:y-}.-

cf ClOmpommts-

... This:

pr-oced:"ure a!so r.eq¢rres bo-tt'"* an. elei!t:r!cal.

• andi a. inecha:ni.ul test. of.

• th-e* trip f uri.ct-i()n -of. t;*he tl.re:aker upon:-complet:ion:

of. md.t\t:Go.t\'Bnce.. "tes£s fim<e f-or* 'Dot:h* the. W and" t:d.l'J E!¥Eln:

the pY.oced'i.<<e.

es:* not; that trips 'be-tes*t*&iL,.." The P.X'Qeedu?'e m.11 * . "oe-rev.tsed:

t.o -require testing.*

of °f)tttll*.

tir.i:'p funt:tien"Et Mhint.enance-i-s.. pedot'tned-on.-the t*rlp*

rt

,;-dueiing*

outage .. Fer &it 2* this pr-o.aedbre was. -pet'!.ortned." in . mafntenanee w:i.11* oe* pe:rf Oltmed:; iil'iOI" t'o i"ni:t'fal*

Oil:

2'. lt!di.\S1:CJ'-

eY.perience-t:o. data vi.th DS::..416

• lfus* 'f>-ean, goi>\\: in*'. _ tilirt

• nlT f.aiJ;Ures

• ta-* tr.i:p-'flave been-* 'X'*eportea,.

t°O* dtte.-.. "l'fle

• bss:. l;ae?l in-serv.$ee.

as .s.inu 19?1,;.

!-s. on . .fusep,h t4* ... Far:rey-1*.,_

Oh"£-l" &*;_2,. 1'rc$ui-re-:-.lr

&.. 2' Vi'l'&'k-1' ..

The. f)S".:.4]:(J.

eil"cilf;t a.

&n\i-ll'm:e' tt:* Vas, designed:

arnf.:

to the appr.o'\"e'd:

IBRE-t_1nm.

M4: WEE

'Trie underVl:rl'tage trip_: 1'.llecll1ini$tll.

oo*

tebe IJS-41Ef br,uN.er.-

• -:tme-Poiunr and.: si.mp-.l.i-!.1"e.0 dQsi"s.-r wh£di."* 1i.as-. no -re?'ul>rH:.a.'t-i"-on.

dtrrins. 1:11tri.ntonatace-.,. . * * -.:;:: . * ' --*--':Ba$ed: c:in* 'ta2" aba.\l'-e.

f.eet-

.:ts

• ierf. a11\f; cont'id"ent tne w:i:*'.ll perf01:m,-wtdt-a* degree* of l'el'.tOOi*l"'ity:

• . . 1--* i