ML18087A951
| 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
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- D't1mit PO\\\\'=ER-* CJ0MJR..~~
P,o.*.Dmt 331M *
~
.... N.a.~'2.
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 * ~i:mii'ssicn-
. Washiri-gt.on,.. n* *. C. 20555
- At:t:ention~ Ma. E. ~- Jtdensem._ CM."ef.
Licensing B~anch NQ~ 4 Sub.f~ct:.. 'Mc:Gu:Lve. lfaclear Station, lJM.t:s* l
~cl-2.
l)oc}{e-e* Nos. 50-3"69*,.... 50-.l:ZO*
Thi$: letter. :Ls. t:o pr.o\\t.i"de aaiH:t:funal*
- inC~tioi'r.* ie-. response to NRC' Staff qoos.ti~ns* arid-' to* cla't'ifY* several* U:ems in-my let:t'.er of. FeErnary~* 2&,. 1983
- On*. the riiaet<ri' trip,; circuit breakers-*
A"ttachment* l*. ~(i'M:aH:ls t<lii~: add! t'iona.i.
inf o.rma ti en**
l"-1-eaB"e ad'l."ise-if there irre addi:tio:11a:t. q_ue.stiOns. re*garfil.~.. tiii"s* tne.~t:er~
- Very: truly* y.oc!rs,..
CACf r/fiP:.
Attachment*
cc: Mr. W-:. 'T. Grde?'s tmc Senioi:= Resid"ent tnspec"Eor MtG"u1~e.1'Li:eldear Stat.ion.
Mr...lames P - o-'lleiil)* ~. R'1g1onal* Adm:inis.t:rato'l' tr. s-.. Nut:lear Reg_t£.latc..ry. Commission" Re:gien-I.I lt>l-Mari-e-tta Street.,.. 1~
.. SUi'.te 2900*
Mlllnt.a**.: Ceor~a~ *30303., --.
ff~0-~05<..Q \\>I h.
'7fp
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. HcCn:tre Nm:lear Stat:i-cm.
M~itic0a:l. !nfonnaei-an.'oi:io Reactor tril!'-' Br.ea:ker.~
. T~...._
- .J.~... \\:..
t* ~
~th* M"CCaire tlJ)"it l-a-ntf: UM:t 2 liar.!!" Yestiu,g1\\ouse 'fyp.e 1'lS~416. rl'r'ctait ~eat:ers.
- installed-as* re:acto-i:: ~ri'p-b"I'ea-ker-s.. O.u. ~it 'l'.,. tesr:tng* of t-~e.s.e-breake~.$.. h-as*
been. performed in** aecoE'dan.ce- 'Wi t:h* tile techn-;kal $p-e"Ctl':featians-a~d* no. f.aJ;,1ur.es.
. have b.een* ol;;se~d.... nils-* testing. 'in1;lude:~ 1)" bi;.+-moDt.hly* trip-tC?r;ting* of tne* breaker. utilidn~.- the umfet:Vo-ltagit i::nil** anc:t.**assO"ciate<l trip-*inech'tlnfa~ and-:
2} triP,- testing of the* ~eaker dur.inz-tne. engineeJ::'ed:* satr.ety. feature.. {l!SFl and. reat:t~~. pi;ot:ect1on. systehl QIBSl t.ests. every* 13' 1n~h:>-..
Jid~tf.ona.Hy,,
alt:hou&h'. not -req_~red-: h}~* the tec:h.ni:'cd spec::tfiQations* fo-r 't!ni"t:. l~. liesti'n& (ti the shmrt. t;riJ?*'coi-1 :fa also-perf.ormed** dm-i~g E~iRP:S: testing* every-18'* mon.ttu~*...
on: Unit Z during. preoperat.i<tnal testing o£ tlle RPS",,. the. b.Rraker.* iPtatus- :tights in* the contr.ol room indicated' that one breaker di:cf not open* ~on. t'E.H!clpt of a td'p sig;:m1.
Subsequ2.nc imres.ti~ion.* sholo.'I.?~ no apparent: ress.on-for the-* f.s.:ilt:are t:o tJ::.ip* an<l. in. su.bseqa,.ent testi-ng the:*. ti.real\\~ apen,el]: a.s: r~~i-red *.
Pr:fo1" ~o. iri:tttn* cr.1ti¢alit~**** aad-ftfoa&i t:est.filg-will be.. perrorined.* ~o ass~re*.
that: an* the te~f\\1\\-icxl. specifica:~icn r-eciu!"rernents* are* met:~
~1'en. tlia. ~t
- i.
l:tc.-ett$e* is i"ssuad:, tfie technicat speci!i.cat:ions ~ill contain-a!i of: tfze* *sa-me-:
req,~f:ni:umt$" as:- the* current-llnit l Technfea:l--$\\>eci"f*i.e:a:t.i:ons-. and... ih:. addd:tioo.,.
\\dl*l co;,tain-toe req'airemet!_t: to R~fo~
.. testi~* oo* "the s~ trii" co1'1 every 18* mondiE>..
T.estf.ng t;f" tfle Unit;. z* nr-ea.kers WGS. la$t.:p-ei-forpie4-on* Feb.ruary 25:.,
l~J..
. -.c.
As ~oted in. -tt~e* hbrusry*. 2Et~- I.9Etl' fon*er., the r~~
-tr.flt-t;.r.~p:.. &te *safer;y,-
rela:t.ed de'\\?f:ces.
Al1. tesdng* aw* maintens:nee* eei::lvitJfe~ are perfoi.n:med' us-ing
.t£P:Proyed* p-rocedures -
!'he maintenance ~rocedtrre* for.* tbese M-eaT;:er.s consi*s:ts of
. 1b$pectio~:* cieani~*,. repair :OT-rer.l~cement.. (-as nef!essal:y-}.- cf o~aKe\\6 ClOmpommts-...
This: sa;1~e-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..
~$'e "tes£s fim<e been~ don~ f-or* 'Dot:h* the. W and" shu~t t:d.l'J ct~ice:$- E!¥Eln: tfio~gh... the pY.oced'i.<<e.
es:* not; spe-cifi"ean1~' Te'}mr.~ that 'fi.nt:h~ 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 af*te~ toaint:~nca.
Mhint.enance-i-s.. pedot'tned-on.- the r~act:'ca. t*rlp* "6reali~rs. rt e~er:y-,;-dueiing* outage..
Fer &it 2* this m.ainten~ce" pr-o.aedbre was. l~st* -pet'!.ortned." in J.,.-~ 1~7.9-..
'tt~i..s*
. mafntenanee w:i.11* oe* pe:rf Oltmed:; iil'iOI" t'o i"ni:t'fal* CT-i*t:fea-ld..t:~* Oil: tln~*'C* 2'.
lt!di.\\S1:CJ'- eY.perience-t:o. data vi.th tf~e-DS::..416
- ci:r~~ br~. lfus* 'f>-ean, goi>\\\\: in*'. _
tilirt
- nlT i'n~e:t'\\!'iee* f.aiJ;Ures
- ta-* tr.i:p- 'flave been-* 'X'*eportea,. t°O* dtte.-.. "l'fle
- DS.-41'6.-
bss:. l;ae?l in-serv.$ee. as ~actc~. trfy~ sw-i~ct~ar*.s.inu 19?1,;. a~d.: !-s. ur~ on.
.fusep,h t4*... Far:rey-1*.,_ Oh"£-l" &*;_2,. 1'rc$ui-re-:-.lr &.. 2' ~~ct Vi'l'&'k-1' ~.. S~~i.~
The. f)S".:.4]:(J. eil"cilf;t breake~ ~- a. t>>i°m2t~ &n\\i-ll'm:e' moder.n~ig~. tt:* Vas, designed:
arnf.: q~l:Ef.*ied.: to the ~atest appr.o'\\"e'd: IBRE- *~anda~da-,.. t_1nm. m'~l9Jtr, M4: WEE 34*4:-l9JS--
'Trie underVl:rl'tage trip_: 1'.llecll1ini$tll. use~ oo* tt!~ tebe IJS-41Ef ~c~ft: br,uN.er.- ~an-:*
- tme-Poiunr and.: si.mp-.l.i-!.1"e.0 dQsi"s.-r wh£di."* 1i.as-l~~l.Qi_. qpe-rat~-::.f.~i~_:to.n,,..arni *r*e~res*.
no -re?'ul>rH:.a.'t-i"-on. dtrrins. 1:11tri.ntonatace-.,.
~*
':Ba$ed: c:in* 'ta2" aba.\\l'-e. inftFrmati.-tmu;;~~e f.eet- ~e* >>S~4It:,.:ts s.d's-'l.~ateit * ~l'i:f ierf. a11\\f; a~e* cont'id"ent tne ns~td:6:. w:i:*'.ll perf01:m,-wtdt-a* M;~ degree* of l'el'.tOOi*l"'ity: *.
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