ML18046A224

From kanterella
Jump to navigation Jump to search
Forwards Evaluation of SEP Topic VI-7.C.1, Independence of Redundant Onsite Power Sources. Requests That NRC Be Informed within 30 Days of Receipt of Ltr If as-built Facility Differs from Licensing Basis Assumed in Assessment
ML18046A224
Person / Time
Site: Palisades Entergy icon.png
Issue date: 11/18/1980
From: Crutchfield D
Office of Nuclear Reactor Regulation
To: Hoffman D
DUKE POWER CO.
References
TASK-06-07.C1, TASK-6-7.C1, TASK-RR LSO5-80-11-020, LSO5-80-11-20, NUDOCS 8012120417
Download: ML18046A224 (19)
v • d • e


Text

'J

.... ~.~'.

Rrn.11tATORY oocKET FfttcoPY. *.~~

~* *..

.. ~

'.* JRoe GCwalina.

.. *DK,ragh.( 2)

Oo8ket Noi 50-255

  • LS 5-80-'I -020.

Mr. David P. Hoffman:

Nuclear L ieensing* Administrator<

Consumers Power:- Company.:

212 w:est Michigan Avenue

.Jacksb~. Michigan 49201

Dear Mr. Hoffman:

-~.

'.Local PDR

ORB Rea di nq

. NRR. Rea di nq

... DEisenhut *

' RPurple *: *.

RTed~sco.

GLainas.

ocrutchfield HSmith

' ** TWamhach OELD

. " OI&E ( 3)

NSIC

.TERA ACRS'. (16)*.,

'1'.

RE:. SEP TOPI'C'VY.-7. C~ l, INDEPENDENCE OF* REDUNOANT ONSITE POWER SOURCES

"(P~LISADES PLANT)

Enclosed is.{copy of our e.va'luation of Systematic Evaluation Program.

Topic.VI-7.C. l - Independence of Redunda.nt Onsite Power Sources.

This assessrnent-'compares~ your facility~:: as described in Docket No. 50-255, with the cdteria currently used. l?y the *regulatory staff for 'li'censing new*

facil,ities.

Please fofonn -u*s if your.as-:built _facility <;fiffers. from the licensing basis ass.urned in our assessment within ;3Q days*of-receipt of this letter.

This evaluation will 'be a ba!>iC inpu*trto\\.h_e fntegrated.safety.assessment

. for your :facility unless you identify changes* needed to reflect the as-built coriditi'ons at your facility. 'c.ThisAopic*:assessment niay *be*. revised* in the future if your facflity design i~ chan~ed or if.NRC criteri~ rel~tin~ to this topic; is modiffod before the integrated as-sessment is-*cpmpleted.

,1

~.

Enclosure:

Completed SEP Topic VI-7.c. 1 cc w/enclosure:

See next page.

'*."t.

~-

Si nee rely,. *

  • Original signed by Depnls M. Crutchf~eld _

. O~nni~ M. Crutchfield,* Chief

. Ope rat ir'lg Reactors Branch #5

  • .Division of.Li~ensing

.. jg.

..-~*

'.-Jift

.*~~

    • ~*

.~.:*

--~*

    • ~***~ *.: ~ :.- ;~-.u OFFIC~~,.. oL.Y. Rs.: #5.... oL:ffr,... *_.-:'... :.. *:_._..'.... *:................,.. :.:............,............_......... :.

SUR NAM~ -'-~~~.~~?.~~-=.~~-.. ~-~~. Li.. i. ~.l_q....... :..... * '. :._.......... * :*.. * * *.... *.. *.. *.... *.. *.. *.. *:....... * * *.. :

DA~E~... ~

1.~/(.?/(~:.. '.J/ 1~.11?.... '.... :'... -.-..*-.**::**"*:......... :..... '......._..............................

N_RC FORM 318 (9-76) NRCM 0240

  • u.5'. GOVERNMENT PRINTING OFFICE: i979-289-369
-f..'_..

I

~*

~*- _:,

-~.. :... :

.:,:~...

_1,'.\\:.*

c*,

. :.** ~*.... *... :

    • ~*. -

. "\\.,

-~.

., ~-.

0WASHINGTON; 0. c. 2o5ss '.,

~~~

-~. :.

      • .... *November**-18 '.- _:fgao. *
  • -~
  • < *. '.-. : "~.**** _. *. -

... *. :r

  • oo~ket
  • N()~ *so~255 *** * **'

. LSQS..,80-lJ-02.Q.

. * :.... ~ :. :

.... *:~-- *...

.i"

!, I'

  • Mr:~ David P~. HOffrnan_. -....... *..

-~uclear:J icen?i rig Admfn'istrator

. ~6n$umers Power Company.

  • _'( *

.. 2J2 West Michigan Avenue Jackson~*- Michigan *>49201 * *

. " : ~

. ~*- "_,; ;

'*.*.*~-...

-b~ar* t-tr. ~offman:

RE:*', stP.\\oPrc -v1~7~t.1, rnotPENDENcroF.RmJNoANT 0Ns1;E_~owrn *soUl~crs. *

.' (PALISADES.PLANT_)

-~.

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

Enc.losecl.is a topy of *our evaluation of Systematic EvaliJ~tion P*rogram*.

Topic Vl:-7 ~C. l - Indeperidenc:e of Redundant Onsite Po.wer _Sources ** :*,

' > ~*...

  • This assessme*nt compares your facility, as described in pocket.No. 50-255,.

with the criteria currently_ used by the regulatory staff for: 1 i censi ng new facilities. *Please inform us: if your as-l:>uilt facility differs. from the

-.licensing basis assumep in*ou_r assessment within 30 days of receipt of**

this. letter.*

Th1s ev*aluation will be *a basic input to the integrated safety' assessment" for your fadlity unless you identify changes needed to reflect the.as-built conditions at your facility.

This topic assessment may be revised in the.

. future if your facility design is changed or if NRC-criteri,a.relating to this topic is modified before. the integrated assessment is completed~

Since~ely**.*

'~c~~efP/.

. Operating Reactors Branch. #5

    • Division *of Licensing

Enclosure:

Completed SEP Topic Vl-7.c. 1

. cc'w/~ncl~sure:

See next page

. :*.'.. _,: ~ :.: *. *... *:: :*:

.. ~. :

  • \\-

. ~.

.. )*.

    • , \\
    • ~-..* :
  • . :._\\.

-~

  • .J

) *.*- :..

~ -... :

~,*2. _. :-

Nove*rryt>e\\: ia*; Y9ao.. *

~.. '~".....,

  • ~.

I"*

      • ~ *. *.,_>-
  • cc.w/enci'osure/. ':... :... '.*.*.
M~*:t.:*Mfller',: Esqui*r*e

~*.. Isliam~ Lincoln & Beale-~-.. **

.. : *Suite 4200, * *.

Orie First*National.Plaza:-

Ch i ca go, I l'li noi s "60670 -~*>*.

~. --,;:..
    • ,_i:*
... ~ **;'. -

.. '....,.:_u~*:.s'.>Environmeritai, p\\;otectioil:.

.. - * *

  • Agency * ~

Federal* *Act i vi fies* Branch

  • R.e.gi *or1 v of i; ce.. '* *.*.. *. * * **
  • .
  • ATT_N°.: TLS ;COORDINATOR

.*. ).*

~-

~~..

{*

  • - **-r~.r~:.

.-*P*a*~i-. A *. -.P~rry*,-

Sec*~e-~ary-_... *

  • *.. 230 South

Dearborn Street. *,

Chica:go,*** Illinois* 60604 *.:-.>*..

" Consumers P0Wer Comp.any

    • *,. Jac;:k'sbil~; Michigan: 49201

.... Jud~'L *.. Ba.co~,*\\squ:ire ***.. **

. Consumers. Power Company.

212 West Michigan Avenue Jackso.n;'-Mich1gan 49201

  • Myr*ori M~ Chet:ry> Esquire *
  • . Suite 4501 * * *

... One I.BM Plaza-..

.. *Chicago, Illinois -.50611 Ms. Mary P *. Si nc 1 air Great Lakes *Energy Alliance

. 5711 Summerse.t Ori ve,

Midland, Michigan* 48640 Kclcmazoo Public ~ibrary 315 Scuth Rose Street Kc. l c.:.;azoo, Mi ch.i gan 49006 Township Superviso~

Covert Tm*mship Route 1, Box 10 Van-Buren County; Mich.igan

  • .Of ff ce of the Governor (2)

Roor;; 1 - Capitol Building Lansin~;. Michigan 48~13 49043.

Director, Technical. Assessment*

.*Division*

Of.f~ce of Radi.ati on Programs *

(AW-459).

u. s. E:nvironmental P*ratecfion

. Agericy Crystal Mall.#2 *

. Arlington,_ Virginia 20460

  • .. *,r'

~; ' -...

CharJes-.'. Bech hoe.fer,. 'E~q.:,,cba'irma_ri' * *

  • .Atomi e::safety.. *and _Li,cens*\\ng Board *
    • p~r]el~ *_* -*:***
  • =-

u~ s*~: Nuclear Re-gulatory. C:omnissibn :_,

Washington,. o.* C *.

  • 20555 **.

1

  • oi::. -Geor.ge_c; Ar,de~son.f *.*

Dep'artirient. of Oceanography *.* *

. : Uni ve*r:s ity of'J4ashi.rigton **-*.*

Seattle,*. Washi rigton.

98195

~

. **.* Dr. M. Stanley Livi ngstori 1:-,

1005 Calle La~go*

Santa.Fe, New Me xi co* 87.5or-R~sident Inspector.*

.c/o U. S. NRC

.P.O *. Box87.

Sou,th Haven, *Michigan*

Palisades Pian+.

. ATTN :. Mr. J

  • G
  • L evli s.*

Pl ant Manager Covert, Michi9an 49043 49090 William J. Sc~nlori; Esquire_

2034 Pauline Boulevard Anh Arbor, Michigan 4810~.

Mr. Richard E. Schaffstan * *

  • W.

W~shington, D. C.

20006 *

  • I~ **>introdllctl'on.. ****.*.
  • -. ::, ; ~. -.

.c- *'.

, '.~
.....

._. *:. ~-._

'.r

~--.

~;* ':

  • - T~e _pufpose*: of. this *~~aJ~~~tiqn.is'. to._a'sce~tiiin.*tne independence of;*:.

r'edy~_da_nt*\\~:f1~:ite**e:P~.~r :s9_u~:2~*s.**. Revi~w

  • c~Her.i a* J re Vi e\\.i' guideline~*> a_nd '.. -*.. **...

.. *(,"*

revi'e~* areas> to.be.coyered'.* 1n: this evaluation', *are.. de~i n_ed *;-~* ** setttohs lI... * *.*..*. *-.

.a~d.:'IV... *.Review areas,thafare* not.coiere'd~ ~b:ut: are r.el~ted and.: ~~~se.ntial

'"~-..

. : ******<to ;the -compl e'ti,ori* o:f th1s: topic;. ar~* cov~_~ed. by a~*h~< SEP topics -d~fi ~ed_ '_ *.

~*...

'*:I,,

  • if!.<section III.. "sEP ta,pic_s are defined in the Rt:port on' the Syst~matic'

.. Evaluation Of Operating Facilities dated November25, _1977.

..,_. ~

This topic:evaluatfon report is limite_d to identification of c_ompliance to

.. ~-.

review criteria,,Td.entification of deviation-from review criteria, and identificadon of any.viable correctiv,e measures for each deviation '

i dentffi ed. <An integrated. system* assessment of th~ i dent i fi e:d de vi ati on; s.

.. significance and recommendation as to the imposit_ion.of corrective measures

.******will. be the subject_ of a ~ubsequent report.

. !I.

Re~iew Crite~ia Review' criteria that gov~rn,the.subje(:t safety topic are~:identi;ied in *

-~--;

  • s*ectfori 8~3.1,_ part U, items 1 and 2 an~ section 8~3.2, _part II, items i **

. *.-*and 2 of NUREG"."75/087, NRC Standard Review Plan*;

  • ./

.i.:a.***

.. ~ *,'

~

.. *~...

'~

..... l- '*. :* **

-~-.

' ~;: -:.. '.*:.: *.

-*. ~*:'

.2, -

- ~*

-:.... ~...

... -~.. :..

  • -: \\,... -*.**

. ~ *:.. _.*

.;~*:.*: *>-.... *:.

    • 1*

IIL.*: Rehted sa*fet:/.Top.frs: :

  • _(...-

. '*.. ~...

. ~*

'rhe follow{ng ljsted revie~ areas arenot:covered.in this* re¢of.t~**but are

  • .., :* *... rel at.eci: and**."~~se~ti.al; to the "compl*~~i:on*:df tHfs.. to*~*~c. >*The~~.-~e~i ew ~reas *

. are co.ve'red by oth_er SEP.~a.pies: as indic~ied below.'

~

  • .1
  • .',/.

~,

}. * **fhe-capabn tti of the e*1 ectrical, i~s*trumentati.on, anci contror. systeni

  • -~-

comp~nents.to. f~nction"d~ring a~(;! after design basis events,: su'ch as

~

earthquakes ~and anti ci p_a ted 0 per~t i ona l occ~rrences. O':;,s tov~~~d by.*'

sEP topic rri.~*s.and rn-12~.

~

2.

The capacity~ capability, andreli.ability of.standby power supplies.is covered by.SEP topic~III-2; 3..

  • The offsite* power system fa covered by topic VIII-1;
4.

Electrical and physical ~eparation be~ween safe shutdown system com-ponents including the shutdown system's vitai support syste111 components is covered bytopi~ VII-~. This area includes cables frqm the Class lE distributionsystem_to the systeni loads;

5.

Technical Specification requirements are covered by topic XVI';.*.

6.

System testing and.surveillance requirements are cover.ed.by topics.

    • .... VIII-3A, VIII-38~ and vr~iQA;
  • T.

Capabilityof heating ~nd ventilation syste.ms to maintain a controlled environment for safety related instrumentation and e~ ectrica 1 equipment

  • 16cated outside con~ai~ment is co~ered.by tdpic IX-5;

(.. *

~..

. :. ~ *:..

. 9..

. '.. : ' ~. I' ;

. " :.... ~.

~.. '

... :.. /

.. ~.

'.*r.*. *X :.* **

~-

  • 1.:..r:.

.., }:

-~-

  • .i.'1"'.,..

'~:-:.: '.. '

(

.. :: *~*:. ~.... ~.... :... " :.

....:.s. :-::rne -~deqSae:;t of the quai'itr assurance*)rag~:a~.:is ~o~ered* by.*

'-.-~

  • *>topic_ XVLI; *_.
  • l,
9*~. SYst~ms req~i red. for safe' s.hutdown are i denti fi ed by_ topic '1Ih3;

~. :: *..

Share*d eng1 ~eer_ed safety features,_ o~;~"i :te :'~m~rgehcy ;power,. ~~d* s~rv'ice.

sy:Stems.-for mulfiple.ullit.facilities are'covered ~y 'CopicilI-lOB;,.

.... '*~.,..

ll.

  • The ECCS Actuation *systefu is cover~d: by topk VI-f._A.J 'and vrl'-2;

~.,*

12.
  • The capacit/~--c~pability~ and reliabilit:i:of DC po~er supply is cove'red by topic VIH-3;...
  • 13; The effects of connect i ~~ _nonsa fety lo_ ads ~to safety re 1 ated power_ source_s
  • and routing of non~safety cables.with 'safety related cabies is covered by.
  • .topic VII-4 and ~III~2i and
14.

The capacity, capabllity., and relfability of the onsite power.system to supply connected loads under *all modes of_ plant operation is covered by

... topic V III-1 A.,

  • 15..

Protect ion of the Cl ass l E power syst~ components from design basis

. *events such as flooding, inissjles, pipe breaks, and.fires are covered*

by_.topics II-3~_III~4. IIr-s.' andIX"'.'6.

.. 16.

_The* independence of _the onsite power *system 111ith respect to the offsite power system is covered by SEP topic VIII"'.'lA.

  • IV.

Review* Guidelines The pur?ose of this evaluation is to ascertain the degree to which ?alisades design complies with review criteria that ~ea1 with the onsite electric po~er

~..

'1....

  • .~...

~.. '

~-.... _*... ~._

  • . J,

. ~..

~ ~ *:

r,.*

  • ... ~
  • ....* *'... ~ ;. \\
  • ~.. '.<*:\\ :*:<**: /. f ;,

. !,. :... ~."(

.... *~**...:*.*).'.: ". ~*-.

... *...;.:4 '.-.;;*:>

~ **:,~. *..,

.. ' ~.

."*.~... *._.... *._'..

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

. *--**<*-~ ::_.

.. -*~ -., *. :

.... :**.......... :.*--.-~*...

    • , *.. * *.... *.*;_.*cf~stribu_~_iqn'sy~te_m*. ***ftie 're~iew.:'areas t~' be*cov~r.e4._in. this e~a.luat,iqn.*... ***... ** :.. :<.*

iilcl_ud~. (A):_tiie)~quired redunda.ncy_of the*oris.ite power.**syst~m, (b)the

'e1ectr'ic~1* fn_terconnedion'. between ~'edund*ant *portions of.. the sy:sterri; *and

_.. : (c):the phys_ical separation betwe~n r~dund~nt coniponent:S of 'the :system.

..,.. '.. ~.

.......t

  • *.:inc.ludi_ng power,. in.strument~ and cdntroJ cabJe~L Review gUidelln.es t_hat
  • _*.*

~

j

  • .~* *.

i

' address 'this' topic's define'd fe~iew areas are deljneated in.'tfre following_... ***'

se~tions of NRC Standard Review* Pl an:. :.SectJon. 8: 3.l/ part *r I l ;_ i terns 1 and* 2 and Section :8.3.2~ part III, fter!l_s.:l and 2>

~'.

Re.view *guideline$ *that address physica) separation of power;. instrumentation,

.a.nd control cables are defined in Reg~latory G~ide 1.75.and IEEE Standar.d 384.

. These. physi ca~ ?eparat ion guide 1 i nes are i nci uded with this topic ~review.

  • Additi6na*1 :review guidelines for ~able *separation, as well as for tJ:ie physical separation of redundant distributfon s'ystem components,* are defined in section 9.5. l, Appendix A, .Guidance for Fire protection for Nuclear Power Plants Docketed Prior-to July 1, 1976," positions 0.1.(a).(2) and 0.1.(C) of the NRC Standard Review Pl ;in.

[.Refer ta the Pa 1 i sades X fire hazards analysis, the NRC PalisadesX Fire Protection Safety Evaluation.Report, an.~ anY supplements thereto for ident1fication of compliance to and aeviatfon.from sec:ion 9:5.'l guidelines.]

V.

Enluation A simpl_ified diagram of the onsite Class lE power system 'for Palisades is presented in fi,.gure 1.

The diagram is based on Palisades electricaJ. drawings.

E-1 throughE-17.* The following ~valuation is based.on the simplified diagram and the Pa 1 i sades FSAR.

-The numbered items on the.di a gram i den ti fy tnter-connecti ons between redundant distribution systems.. The letter-number items

. ~,. "

~. '.*

  • ~.
  • -.~"

. : : ~.. ;

'.,... ~:; -.

-../

'.* ~.

.*,.*:=

~:*:

":-" **.*: \\

~.

.., (-'

~ *'.

  • ~.

.:; ~.

'~...

.. ~*

  • ,*... -r**

~

-~~:....

"*... -*-..-~~...

~......

~.:
  • -~"*"

.:~~.

1.

  • *-: 1':

~.

' ~..

  • .. *1_".
  • . id~ntiff distr.ibution ~ystem components *reviewed *.for physical.separ~tion."

. ~.

. J...

. 'Determination o.f COl,llPO!l¢nt 1.ocatiall and* p~ysica) *sepa~atfon fr6nr~edundaht'.

. ~

  • ..... * *"counterparts is
  • ba_sed upbri. Pali s'ades.. equ i~m~nt Jocali on drawi ng_s M-l.

~~r:ough. M~ 15... *

,. '.: ~-....... ' :_

.~.*

.~

.. ~ *:- '

Regu1 red. Redunda*ncy *...

. j'

.. *The Pali sades. o~s i te ¢1 ass l E AC power syst~m tonsJsfS.of two redundant :

dies.el. gene~ator.*(DG) s'upplied*power"di~isjof1s:.-DG *1-l.suppl*ie.s.2400.*v

~-

. **.bus.le arid, DG l:.:*2 supplies.2400 v bus fD an~ *. through. Station.Power*<

Transformer 12, 480 v bus 12 and 480 v MCC 2~ ****

. ~

The Pa 1 i sades. ons.fte.Class 1 E DC power system con's i sts of.two.redundant 125 v DC divisions.

Battery _No. l, Charger No. 1 and Charger No. 3

~upply 125 VD~ Bus No. L Charger. No. l*js supplied from MCC 1. (and util irriately DG 1-1 )'.

Charger No.* 3" js supplied. from MCC 2 (DG l ~2).

Both chargers *are*norma11y con~ected. to 125 V DC Bus No. l.

  • The supply arrangement.. to 125 V DC* Bus No; 2 f s
  • again, similar, with Charger No.~

2 fed* from MCC 3 and Charger No. 4 fed from MCC l.

Based upon* the need for a two div.is.ion Emergency Core Cooling capability.

and safe shutdown capabi1 ity.. \\.le conclude that the, two. redundant. onsite AC and DC power systems described abo~~ meet the redundancy requirements:.

This meets the review guidelines and criteria defined in Secti.on II and IV of thi.s report.

  • . :._ *.. \\'

... *~.' ':. ;

-._~;

.. 'r

-. ~:

. *-.\\. *.... "'

. :.~. ":

.. ~,.*

.. -.. *-." ~*.. --

't

'.. ~..... *:. :'. ;. :_:....

~..

~.

,\\..

>>-.. ~-.. ~*... ;.'.:-
  • -*i"

.. *.*;...*. The P.~lisadesl.2d vo:lt:Actnstr'uinenf power:\\s.. supplie('f~om'.a s'ingle,*

- "" ::. J

' *'".. -.. i non-redundant, 120 volt' AC inStl'.'ument bus (YO,H..

The instrumeiit,ifus.

. *.: can re'.cei v~ *power from *ei' ~her~ 4ao v~l t. motor tontro*1

  • cen*t~r *. l or 4ao ; *.

volt mote*~. control center,3 via an automati,c transfer-3witch.

we.. con*.;;_

._ ~ '~.

~

ci ude that* the :s 1 ngle instrument bus does 'not meet the mi r:il~u~

r~'dundancy requirements and-.fs a.deviation from the.*review guidefin~s, *:*

\\

" <~nd Criteria defined in~ Section I Land IV of 'tnis' r~port.* Redundant:

instrument loads suppiied.from this sin,gle bus do ~o(rrteet.the single h

... *,fa i 1 ~re** crJter.i on.* The 'r'equirement.that safe_ shutdow.ri.. 1 cads meet 'the..

  • . : 'single failute criterion is covered by topic vu:..3,' Systems,Required for Safe Shutdown.

Deviations and recommendation for.corrective*

measures a~e addressed.in topic VII-3~

The.Palisades 120 volt AC vital power. is supplied from four 120 volt

  • preferred AC buss.es numbered 1 through 4.

Preferred.~c buses. 1 *and

} comprise one division.of preferred AC:

Preferred AC.buses 2 and 4 co~prise the other:

Buses 1 and 3 are supplied by Inverters and. 3 re~pective1y; or by the B~pass Regulator; the supply arrangement ~r buses 2.and 4 is si~ilat.

... *. The rteactor Protection.$yste1i1 and the Engineered Safety Features

  • .. Actuation System are four.channel systems requiring a. rect1,Jndant power
s.uppl y for each channel; We conclude that the four preferred AC buses described above meet these redundancy requirements.

This meets the.

. review guid~lin~s arid criteria.def~ned in Se~tion II and IV of this report.

    • ~ ;*.... *:*!.,*.

}_"*..... '

-~* :-,:.:*. :."*

.~

  • ~.,:..

... ~.. '..

~ -.

..,,a*'.*... '***

    • ~*;

I;

-~ :

~* '..

~--. '... :.. ~*

..,... : ~:.., -...

  • .* _,.:'. ;*:=...

'. ::_:.. *. :~;..

!.\\*

-.~'

... '.. *~... *> ' :..7 -

..2

~._ ' '

. -~.* -~.'.

_;. ~.... '*

1

,B. *.Electrical intercon~eeti6ns

~A s imp 1 Hied di a gram of th~" o~s i te P()-~ier. sys~-~~ is presente.d ~in: figure 1. *

Each of the,folJciwfng paragraph nuniber*designations corr~spond:to.nurriber$ *
  • ., shown o.n figure 1 and to interconnections* betwe~n. redundant *:Cl ass TE '. *.
.. ~. :.
  • .* divisions or. betw~~n CHsslE and-ncui~C.lass.l E systems>*:

~,. '

      • ". J.

. *. 1 :.. :ihe Z400.v'*buses 1 c. 'and 1.D. (and *.therefore. DG 1 ~ l and.D :l.-2J'; can*:

<*'be:ti~d together* only if e*ither'.offsit~ *feeder break~rs*Hz~ios

. and *152-203 (norma.11 y* closed) *o~ b~eakers lS.2-l 06. *a.rid* 152;.202 *

(ncinna ll y' open) are closed, On *1 oss of *the *offsi te soµrce, these breakers. eac~ receive an automatic o*pen: signal from independent low voltage sensing devices located. on bus '1c for -breaker~ '152-105 and 152.;.105 and on bus lo for breakers 1s2~202 and1s2-2o3.*.Thus, there*

is no single failure that can cause the interc;onnection of bus lC and* 1 D and the par all e 1 i ng of the sta.ndbyonsi te power sources a ft er loss* of _offsite power.

Thh meets the review criteria and giJidel ines defined in Section II and IV 6f this report~

._*. 2.* *.. -.see ; tem" _1*.

~. *

  • 3.. *The 480 V buses 11 and 12 may be *tled together by closing breakers
  • 52-1118 and 52-1217 (normally open).*. An. interlock prevent~ the..

. clostire of thes~tie breaker~ if bcith breakers connecting the redundant ~ourtes to buses 11 and 12 (br~akers 5201102 and.52-1202, *

  • respectively) are.closed; one of these two supply breakers must' be open in order to close the. tie breakers.

This.meets the review criteria

.and guidelines defined in Section II and IV of this report.

...... ~

,*.I*,

>/~*;:-*._.. ***: -

~t: '. :.. :

.~** " *'..

.'('*' :*-

.. ~ *',...

-~.,..

.. ** -*~l

    • *** ".; ' - 'f ** :".-
  • ~ ':
  • )

r**.

~.

~,*. :.<

' : :. ~ :... -:. :.... '

-~ :

~*

  • .,.*I
  • ~ *..

"':}:..

~

_: :":; ~

_-_- rh~~re :are no 11miti~g condit1an:(f6~ J>J~nt operatja~ w;h~*n-4ao ¥01 i:

--... bus f2 rec~fves power from 24_00:V.:tH.is lC, throug~--4~0 volt bus lf** _ >* :.

~r:when 430._-volt bus 11receives_power--from2400:V bus 10 tlir~'ugh.-.

  • - " '480 *vo,lt -. 6~-s _ 12_. / Th.is i~. :~. ~evi ati*~rj: ~q)QJ. r~*ti e*~- 9u.-id-~fi'n~s_*; d*~f~,n~d :< "

. : in. _sec.ti on Ir and IV of thfs.repo-rt.*:<~n*~~xainple of ~.n 'app~aach that

  • cdul d c:orr'e~:t th*is deviati*o*n~. wo.ul d. be to* incl ~de the -~ppropria*te _ ;;
  • 1 i mi ting: cpndi tions for: aper~~ ion in the~ P~J i sades:_ Techn i ca 1, * -

-~.

.. \\

~

Specifications.*

The Palisades design does not include control circuitr.Y fo open the_

two tie breakers automatically upcin the loss of offsite power.

This is a deviation from review guideli,nes.

An example oi an approach that could_ correct this ~eviation would be to inst~ll appropriately*

designed contr61 -cjrcuitri to prevent possible paralleling of standby power sources, or overloading *of one onsite.source on lo_ss,ofoffsite power~ ----

4.

480 v6lt motor control center number 2 (MCC #2) and MCC #1 were_ tied together through i ~strument AC bus as shown. on fi_gure l.

This inter-

  • connection was deleted on Palisades drawing E-1, Plant Single Line..

Diagram, Rev_ision 1, dated. ~arch 28, 1978~

The power source to the

. 1nstrument AC bus '"'as changed fro~ ~C~ #2 to -.*~cc #3;. The change represents a new i nterc~nnec_tion between MCC * #1 and ~CC ¥3.

See item 10 for the evaluation o.f this*, new interconnection~

'. *. l

~- j

  • .. \\.

I

. ~

.. ~. -*.:.....

~....

..,~

~

.. :....... ~..

.. - : *:~.*..

. '"i '. ~*.

t*. ;'.

.. : *.: ~*... *

. 1'-:.:";;..

.. 13/ the. del.etion of th~ \\~terconnection. 'between,\\1CC #2 and*}'1Ct #l,

  • the :concern. for possible failure of *both redundant divisions

, '..,. be'c~use 0 f. fai i ure 0 f the common ins tr.ume*nt AC pus*' ha$,bee~ <.

.. :.. *el imi natecL :*:~

..~ _.. ':~.

  • '>. /

~: ">--,. '. ~*:..... :. '.'."....'.. '*

  • *, ',r'

. :... :. ~. ~... ;.......

. 5'.. Each of the two batt.~ry char.gers *A.hi ch s~pplycpowert6,.a _.given' '

~*....

  • :.*izs V DC bus, are unde~.sized.*'Thus bathchargers'o/:the *batter/***

steady state o~ load. *Given a _LOCA with simultan~ous loss of offsite

  • power; *one of the two battery.chargers will be automatica1ly discon-.

.nected to ma'intai ~ the ind.~pendence o:f the tw.o: Class lE po111er*

divisions.

Also, given.a _single failure of a.battery charger or ifs associa,tion*AC-:power source~ one of the two battery cha~gers will be lost.

Present review guideline's requ'i.re b~ttery charger. capacity to b~ suffi ci en_t to carry the maximum steady state DC loads as wel 1 as recha,rge the ba.ttery fo11owing *an accident. *The present design at Palisades is a deviation fr~m these review guidei ines.. An *example.

of an approach. that could cor~ec; this deviation watild be to replace two of the, four _battery chargers' (one per *divi,sfon) with larger capaCi ty *battery chargers.

6.

See item number 5.

I

  • Each preferred AC bus my Je supp 1 i ed by its inverter or the Bypass Regulator.

The.su.pply breakers to each preferred AC bus are inter-

    • 1ocked to prec!Ude the ;>o~sibi1iti of a b'us being tied to.both sources simultaneously.. This meets review guidelines.

However, it

~ - '

,} *>'

~...

~.

., ' ' _.;. ~

. =~ :: '
  • ~*:***

-.. >.*.~:

~..

,\\*** *. -

~ *:

  • =:'.:..*

'.r*.

*- : ~.,

' -. ~ ~

\\

"~

1:.

I

~-,_.. -~ :*.

...... i ~ po~s ttil e to supply all fou'r. Preferrec(AC"buses from 'the-Bypass.

- ': ~.

~

  • ~..;,

,~*-

.=.:*._-::,......

~*-

Regula tor s i inu 1taneous1 j:: *rh; s ; s a, dev; a'tian from, rev.iew. g1J; cie....

~

.~*~......

'1. '

' * ~*

  • lines.

A:n example of.an**appro~ch~that could correct.,thi'~ dev.iation*,.

.***.. 'wbui d.:be. -to 1 imi:t. the.number of* prefer:~e~.. AC-*_guse-s 'tha*f coul:d*\\J~:.

-'. ~ -

  • -, *. :*' --~

_. ": *- *~: -. ;_*.:. -_ ; **_.. -:*--**-,..-.. -........ \\_._.:\\~>.~... ~.:-.--

-~:.*- :*=: : -:--._-: ;_ *-_... **:-:-. -; *.. ~ :.: _::- :*_;..*~:*:.:> :'.: ;. *:*:->.:{ £ >.::* -> - -'... -.

~iinultaneous ly >connected t_o the: Sypass Reg.ulator ~nd. p~ovi de *.*.

~ - "..' *.

limitiri'g',conditions for operat.io~ in the,Technical Spec.ificati.011s.

, 8.

Associated_ non-Class *1 E 48.0 vol*t-.b~s. 77 is. inte~c6nne~te'd wjth non-

Class* lE.bus 78 by a single. tie. '.breaker.. \\ The.s~pply* b*reaker{to
  • bus-7? and 73 are interloC:ked,with the tie bre-aker sucli that'one o'fthe.two,*supply breakers must be.open to close ~he 'tie-breaker~<

. Thus*, Cl ass l E.bus l C cannot be para 11e1 ed *with non-Cl as~* ;l E bus 1 C:

through bus 77 and 78..Al so; the. l qad. breaker on bus.1 C op~ns on loss of offsite power to prevent diesel generator 1-i overload>

'This meets.the review guidelines..

3*.

  • The interconnection between 480v bus 13 and 480v,;bus."J4 *is the same as item 8 evaluation.
  • . l O.. Division l Cl ass 1 E MCC #1 is interconnected '"'i th non..:c1ass 1 E MCC #3.

through an auto trans fer switch.vi a the instrument AC bus. ** Power to the *instrument AC.bus is normally supplied by MCC ;fl:* Uith*loss *of MCC #.1 the power source is automatically transferred from MCC #1 to MCC #3.

Because MCC #3 is non-Cl ass.1 and is not interconnected

  • with MCC #2:(MCC #l's redundant co1Jnterpart), this design meets the review guidelines.

-, '1

. *'\\;.. *

-. ~. '

.. *: /*". *.... -..

i-.:.'

.... ~

.. ~

' ** *. _:~.,

. * /*'*-*****/:*..

..* t

-.. :,;~ :.... :.

  • ~ *.

'.:... ~.... *.,

. ',;.... ~::.

. *.. ~

. : l i. Two* as*s*oci ated non~tl ass 1 E.4a.o: voh: bu'~~es: for *swi tchya*rci~**roads:

... ~..

(

are inte.rco.nrl'ected by a sfogle_,tie~b~eak:er.. The. supply b.~eaker.s*.

~. :

  • .**to fhese :busses.~are*interlock'edwith.tie::breaker suct(,t,hatohe o;f.

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

~. *"

,;~:.. * * * *

  • the: two' suppl*y br,eakers.. m~*st be open.. to cl.os.e. the.. t.i e b~eaker.' ;:

.. ** ~

  • - _* ~ *'
  • rh~s:,.ciass.lEhus*1.c cannot be parallel~Ci**~itll*n*o*11-:C1ass lE I
  • .*.
  • I

'.r.'"

~...._. '

~.. :

. *:. ~-

  • .*buses; The evaluation o'f.*ftem 8. app_lies, to.tl:lis d*es.igrj..
c.':.. Physical *separation**~

. *, - **. :; -~....

"A 'si ~p li"f.i.ed di a gram of the* ans fte powe~* syste~*.is* pre~erited. i.ri figure i.

The *1etter-number designations on figure.1 :identify distribution:syste111 1

components herein evaluated for _physic~l ~eparation:

The f~l-lo~ing letter-number designation correspond to.*1et~er-number designations shown on figure 1.

(A)

Each.of the folfowing items _are located.in a dedicated.room or are separated by the equivalent of a three-ho~r* rated fire barrier from their redundant counterpart or. from components ~ssoCiated with their redundant counterpart. :Th i's meets' the review cti teri a and guidelinei defin~d~in Sectio~ II and* Iv of thi~ report.

  • (1)

Diesel. generator 1-2 *

(2)

Diesel generator*l-1 (3) 2400 'I aus

  • 1 D (4) 24b0 V bus lC (S) 1.25 I/ batteries

. *~ '.;..

' '. : :: *~:.... :

. :' -~-*.

  • .*. ;* :::. ;:. *..-,:* \\,.>(~..1.it~(~:"'.:>.
  • ~,
  • .*.*,y.

~....

)*::'

... "'. ~..

' ~..

,l' *'

  • '... ~ l I
, *._' ~-

.-. '*.., ',, -.'. :.*.*.*r-

  • -~.. :,... *-:... * : *.,f
l

.. *l* "

'1.'",.: *'*

... *. **.:.. (B) >

Ea~h ~ f \\he fa ll6wi ng i terns'.\\~e* 1 o~~ted *in ::th~ *:g~:nera:l are~ of '

    • <1

. I

.* '*\\

~- '**

.. *.*: ~

~ -~.

.th~ir. re:du~dant counterp~rt~* 'or"-fo 't.he ar~a o.f.. ~~mpone~ts assoc~.,**

  • , ~

~.

  • iated \\<1ith'_fhefr. redu.nd~n(*caunterparts:
  • ihe separationbe,tw'een
,.
:.cbinponents,*1*:s'.*) ess tha~ t.he. ~q*u i ya Jent-. 6 f a.:three~ho~r *. rated*.*...

~

,~* '/,* *,,*-.

    • ~*..- '."*"c.*.*::** _.

.. fire *barrier.: This is. i dev i a.ti o.n from.. Section 9. 5. l :review ~ufde-

<lines.de-fined in~S~ct.ion r~:~f this.~epo~t.. :.. R~fer to.the.Palisades fi*re hazards* analysis,;th~'NRC P.a.lisades Fir.e P~ot~ction Safety

.**. Eval ua,ti ~ri ~¢Pd\\.t ~**and. ariy supp.1 ements *.'thereto._for }dent i fi ~~.ti on **.*

. ~

.* of c~mpliance fo, d*eviati.~rn from,*aiid corrective des~gn measures.

. requ.ired for deviatiOns from thos~ rev~ew guidelines>.

(1)

Cable between 2400v. bus l D and DG l "'.'2

. (2)

Cab1 e between 2400v. bus 1 c and DG l ~ l (3)

Cable between 2400v bus 10 and bus 12"

. (4)

  • Cab1 e between *2400V bus lC and bus 11 *

(5). 480v bus.12

( 6) 480v bus 11 (7)_

  • Cable between bus 12 and MCC #8

( 8)

Cab 1 e be'tween bus 11 and MCC ii7 (9). MCC #8 (10)

MCC.#7

( 11 )

Cab 1 e between bus 12 and MCC #2.*.

(12)

Cable between bus il and MCC 'fl (13)

MCC #2

( 14). MCC #1 (15)

Battery Charger C-2 l

. *\\,

  • .1.
  • .. ~... *".*;..'":.
  • ~ :.. '

<,: :/~**<>.. *

... r....

  • ~ :~..

'*.~ ": *, '.

'..'_:'*. ~-... :.::. ~.. ;.

.... -,:.::.~ :. *'. :,

.=.".::.* *.

~.

  • . ~..,.

~*.

.* *< ;~ *~*-

  • . '.. * *.. :'":*1:".*:
,*',* 'i... :.:;. *,,

'.'. ~*.

-~ "...* :,.

. ***-:\\.:.. ;

'.. ~.

... '.. \\.

  • ** -1*

~...

-::°:;*>

(l7f r2sv oC.t:i~s #2.,.,.

    • '(la_)*. l2Sv oc bus. 41 *

'~

,(.l9J.;bc-Ac*.;nverters I-1, 2, 3, and_4.inc_1uding a*ssociated*

', -~**.

. '. ~..

*. cabl'.es
s. * *

(20)< ~referr~d Ac buss~s *1, 2.,, 3;* and 4

~ */*...

.. **. ~..

  • J For _:~he abo~~- 1 i sted c.ables ~nd /o_r~ ins trumenta ti.on an.d. c*o_n*trcil..

",.~

'. i

'II.

~

ca_b\\es *. assbciated *.vi.th the,cl ass lE power distri.but-ion *sy,steni*..

..,\\.

. c~mponents,:the sep_ara_tionJs *less than the s ft. vertical,3 ft.

..

  • hciri zonta 1 reco~en.ded by: Regulatory Gui d~ l. 75, This is. a,.* *

. deviation from the review* g~id~U nes. *. An example of an approach

    • th~t'could corr.ect this deviation.would b~ to perform an-anaiysis
  • for.the above cie,finedcabreito identify the specific deviations from the recommendations of Regulatory Guide. 1.75, For each specific

.deviation ideritified, correctiV~ measures such as. installation of

~barriers, r~routing of redundant cabfes, or iuppiemental analyses.

justifying the existing sepa;atfon on some other defined basis are

  • ~cceptable approaches to removing this deviation.

Conclusion*.**

The followi.ng list itemizes the deviations from review guidelines that have

been identified and described in* Section V of th.is report.
  • 1... The single 120 *iolt AC instrument.bus d~eS1ot meet the minimum.

redundancy requirement.

C(he deviation and recommendation for correctiv~ measures are ~ddr~ssed.in topic'VII-3.)

'*-.. *:~*. :*.

. ~....

~ "*:* *:*!

. *}'*

,***.'*1..

-~.--.

' 'i'.,

.. *:. ~*

  • .. *-:;*.*-;;~\\:

. ~ :.

.. ~-

1

~-

.. ". ~--~ :..

    • 2 : *. *. Th Ore ;t~ ~o *. i i ni; i; ii 9. cciOdi.it ~n~ fa> Jr~~?. j ieCa t1.&~<hen b aS. I 2 * * *

.. ~-~*....

... -*.." * * * ***.receives power from' bus*.1 c. through ous 11 or ~.hen bu,s. 11. re*~~I~es ~

  • <~pow~r" from *_bus' fD-.thro~gh bus 12.*: *. "* ", ~:;

'.)_

J 1

  • 1
  • \\
  • i : ** *'.... '
  • *.... -.. ~ -: '::

.. '.r *,. *~.. :..

~-

., * *.\\ *:3;* -: *I~ regard-.to* th~ _i_;e__-br.eakers b'etw~e_n 4ao **v*'bus*'i.1 *ard,-z;!controi -

circuitry tb.automaticaliy _open'these:ti~ breakers concur~ent:~jth a.

~~;-..

~-.

.loss of offsit_e power* iS not included i.n.the design;'

.. ~

  • ~
  • ...,:.*4.:.Each of th~ four-. battery. chargers*, s~*ppl'ying the 125~ DC s*ystem; are <
  • ~ndersfied with respect to carryin.g maximum steady state:oc load

-\\: *.

following.an accident.

5.

Each preferred At bus. may be supplied by its:,inverter or the Bypass

  • Regulat~r: It is possible to supply all four preferred AC buses from-*

the Bypass Regulatory simultaneously.

6.. - The physi~al separai{on. of distributiQn system comporients (identified' i~ s~ction V-C items Bl ~hroutjh 6201 a~e iess th'n the equivaleht of a.

three-hour fire -rated barrier* from :thei.r redundant counterp~rts. or.

from components associated with their redu.ndant.counterparts. *

7.

In regard to distributioh system cables (ident~ii~d in section V-C

  • items Bl through 820) and instrumentation and contl"'ol cables associated.

. with the distribution system components, the physical separation is less than the 5 ft. vertical 3 ft. hori.:ontal. recommended by regulatory guide 1: 75.

    • ri~--'

v v,;,~2...

. j,. :'.

'J*:. *,. *,

    • ~ :

{.. *,.

.. *: ~. ~.. ; ".

~*" *.'.

I.

'. ~... :

    • *:.:~.*.. *.

~

~).

,'J :.

.~'. ~ ~..

~ *.

. *~

~ :.

r-:l(;c.1UE

1.
>llEE:T 2. br:: '-2,

~//\\APUFIGO Of\\JSIT~ 1* ~l)E'R srsri;*A,1* f"l>Jf.

PAilf.Jl~ii

  • < *..... ~*.

..*,. - *~ : :

~,.,.. *:* : :.

~ -... '

    • ~?....

.. ~'

~

~*

.. { : -.

    • .~" *.. *.

~*~-?-o~r_*~~~-~~*~_-_*~~~**~:~~=***=*:

.. t~*-*.*_.*.*~~-~~s-.*~~~~~-**~~**~*~~**~*;~v ;~~~l3;~ ~~**.

o.**.. -c.--.:'1-_ t. (,\\.\\'\\.*............ _*. *... *.*.*. ?*~-

-**.* *.. *. *ic-.)

.... ***_**.*.... *-*.. -.... ~~**~

~ - *

~ M

  • C!:.

ct-@... c-J

~;

  • ~

C*'/ *

~li'Jitl~ ~If) -::-""' *

  • r *
  • 1. *

--r-* *. * * * *.: *

) * * * * *

  • r* *.:.,

~_...11.,..5.._t'_.l_,'cr-*....1t......

~v'""~~li---;...t1r~i;.:.-___;.-._..-*-* -Jl1-)

}12 ~;.,pc*< ub.j*:.-,*1

)u:*)***.*

  • . ~. f<~.., ** 1... *.*.
            • .. ~. >

. ** I, I>

t,*.. *.***.*.* *.** _*

.\\ '

J:*'f

1. 9.

..... ~

1~1.

..... ** :**..... **@... ~ J:J I

.;~

flY f'l'l.S~

N G1JJ../lfi.'~. *

)."""'.'"

~*-* -* *--

- )

. ~. '.

.~* :,.,.

. ~
_*" 1
Retrieved from "https://kanterella.com/w/index.php?title=ML18046A224&oldid=5024864"