ML17174A571

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Forwards F Rosa 790930 Memo Re SEP Topic VIII-3.B,DC Power Sys Bus Voltage
ML17174A571
Person / Time
Site: Dresden  Constellation icon.png
Issue date: 11/18/1980
From: Crutchfield D
Office of Nuclear Reactor Regulation
To: Abel J
COMMONWEALTH EDISON CO.
References
TASK-08-03.B, TASK-8-3.B, TASK-RR LSO5-80-11-022, LSO5-80-11-22, NUDOCS 8012110426
Download: ML17174A571 (7)
v • d • e


Text

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Docket Nos. 50-1 O, *.. * -

NRC PDR 50-10 & -237 6I&E (3)

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NRC PDR 50-10 & -23~

ACRS (16)

TERA 50-10 & -237 Gray File '(2)

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NOVEMBER. 1 8 1980 NSIC GCwalina.

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  • WRussell OR~ #5 Rea~ing

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> Mr~ J. S* iAbel : r._,,-;;"_:;

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  • Di rector of Nuclear l1 cens1ng

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  • ~:~Corrmonweal th Edison Company

. Post Office Box 767

.:. 'Chicago, I111noh -60690.

.DEisenhut RPurple JRoe

  • RTedesco TNovak GLainas..
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Dear Mr. Abel:

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SUBJECT:

. SEP TOPIC VIII-3.B, D. *c. POWER SYSTEM BUS VOLTAGE

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'<",,~f:N;;:f:nclosed i's a*COP.)' of the memorandum from F. Rosa titled ao. c.

System Monitoring Annunc1at1on" that jou had requested 1n late

  • September.

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Enclosure:

As stated
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  • See.next page
  • original signed by Dennis M. Crutchfield
  • ;..Dennh M. Crutchfield, Ch.f ef

. -Dperat1ng Reactors Branch 15 *. r 01v1sfon of L1cens1ng

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  • *SEE ATTACHED YELLO~J FOR PREVIOUS CONCURRENCE* **
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Docket No. 50-10/237 Mr. J. s. Abel Director of Nuclear lf cens1ng

  • .Conmonwea 1th Edison Company Pos_t Office Box 767 Chkago,rI11fno1s 60690

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Dear Mr. *Abel:

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SUBJECT:

SEP TOPIC VIII-3.B, O. C. POWER SYSTEM BUS VOLTAGE

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.Enc~o~ed is a copy of the memorandum from F. Rosa -titled "O. C.

System Monftor1ng Annunc1atfon 11 that you.have requested in 'late

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September. * * * ' *

Enclosure:

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See next page

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Sincerely, Dennls M. Crutchfield, Chief Operating Reactors Branch #5 Division of Licensing

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DISTRIBUTION Docket NRC PDR Local PDR ORB Readfr:ig -

NRR Reading Deisenhut RPurple JRoe TNovak Glianas RTEdesco DCrutchfield HSmith

... PO' Connor

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NSIC TERA ACRS (16)

OI&E (3)

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Ddc'i<et Nos'~ 50~-,-o,.

50-237

  • . ; ~sos-~0:..11-022. ** *

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  • *.:: Mr. --*~1
  • s. -Abe 1.. ;_

. *.. Di rector of Nu cl ear: Lfcensi ng **,,

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  • Commom~ea 1th Edi son Company._ *.

Post Office Box 767'"

  • chicago, Illinois~ :6p690

Dear Mr;. Abel :

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SUBJECT:

SEP TOPIC VIII-3.B, D.

c~.POWER SYSTEM *sus VOLTAGE (DRESDEN. 1/2) -..

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Enclosed.is,a copy 'of the memorandum from F. Rosa titled 110.* C.

System Monitoring Ari'nunciatibn" that you* had requested in iate September.

. Enc 1 osure:

  • As* stated ccw/enclosure:

.See next page

  • Si*ncerely,

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. - Operating.Reactors Branch #5

- Division of Licensing

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\\.c'ouris~fors: afiaw *< <* :- ;: -:.. _.*.

ATTN: ~, Chief~ oh*; s'iori-'of' _ <,

-*-*, Orie First National' 'p'i'aza, __ 42tid Fl oo'r;'

- *. : Nuclear.Safety

**.::chicago/ Illinoi~-- 6.0603- :*.*..
  • ..',.:.... _ *.. -: 535 West Jefferson*.. _..
  • spr..ingfield,"IHi_noi_s --62}~1_-.

. <_M*r. *e >s.- s'tephenspn ;

Plant* *superintendent-(

~Di rector~ _Techni caJ *Assessment :.

>~*-*.--." >Dresden Nuc.lear-P_ower_Stat_ion

      • 'Division

-' Rural !route* #l

' 1 Offic~* of Radiatio.h P*rogra-~s -.

_, )1orris *. *1Jli~<>is.*_~o_450 **

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... :~u~ S>Envi roninental Protection -

_Agency ** *

-- *Natural _Resources D:efense.-Countii

. Crystal Mall #2

  • . 9l7*l5th street',.N>w~. * *
  • --A~lington,_ :vfrginia _ 2o46o*.
  • washirigtori, o. c. ~ 20005 *.

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. *. 0-. s. Nuclear Regulatory Corrmi_ssion Resident Inspectors Offic(

~resden Stati~n RR #l.

  • Morris, Illinois* ~0450

'Susan N. Sekul~r Assistant Attorney General Envi~onme~tal Control Di~ision 188 W. Randolph Street Suite 2315.

Chi-cago, *Illinois.*. 60601 Morris Public Library

  • 604 Liberty Street
  • Morris,* I 11 i noi s 60451 Chairman*.*

Board of Super~isors of*

Grundy County

  • Grundy County Courthouse.

Morris,

  • 111 i noi s *.. 60450

_ J~hn F. Wolfe, Es~ui r:e _ >

.3409 Shepherd Street Chevy Chase, _Maryl and _ 20015 Dr. Li nda W

  • Li t t l e 500 Hermitage Dri:ve
'.u*~~;n~;vir;ornnenta 1 p rote~t i ~n '...
  • Federal Activities Branch *
  • Region v Office ATTN:*. EIS COORDINATOR

. _ 230 South Dearborn Street

  • ' Chi ta go, I 11 i noi s 60604 Dr *. F cirrest J. Remick
  • .305 East Hamil ~on Avenue*

State College, Penn~ylvania _ 16801

. *Mr. Ri-cha~d E. Schaffstall 1747 Pennsylyania Aven0~, N; ~-

. ~ashinqton, D. c:

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_*; M~m*RA~tiuM FOR:* ;o*. cr'~tchffe1d. Br;.. h::ti* chre*i,-'SEPB~;ooR,: -NRR * *

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SUBJECT:

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D~ C.: SY.STEM.t-jQNITORl*N~ A~io At*ltiUUClATlON

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In'.: ~spbnse ~to.You?- _membrand 0

um :~f* Septembe_r- ~5-,.1979, we"*. bf fer. the'*f-0'11 o~1 ng.

<*. com.ilent.!;*on *o.c.*pow_er~systein,monitOdng*'and *annunciation:

. :., :,;_The.speci fit ~q~jr~ments for D. *c. po\\'l~~-~ystern* monitoring *d~rive froni.

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. the. general requ_irements embodied in Section 5.3.2(4)~ 5.-3.3(5) -and 5.3.4(5)

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of l~EE *std. :Jas.q ~*74, and in. Regu_l atory Guide L 47 *.. In sur.inary, these
    • general requirements.simply.state that the D~C. system (batteries, dis-
tribution systems' and charged).shall. be'monitored to the extent that it..
  • . is shown to. be -ready to perf~rm its intended funttion. Accordingly, the *

-*guidelines used* by PSB in the: li_censing review of the o.c.* po\\'ler system.

designs a re as. fo 11 ows:.

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As a minimum, the.following_ indications and alanns of the *class 1E D.C.

pe11~er sys.tern staL~ shall be-provided in the control room:

B~tt~ry current (arraneter-charge/dis.charge)

Ba-ttery charger output current {ammeter)

  • D.C. bus voltage {vol ttneter).

Battery charger.output voltage (voltmeter)

Battery high discharge rate alarm D.C. bus uridervoltage and overvoltage alann D.C. bus ground alarm_ (for _ungrounded system)

Battery breaker(s) *or* fuse(s) *open alarm Battery *charger output breaker(s) or fuse(s) ot==:n alarm**

Battery -charger.trouble alann (one alann for a number of abnonnal * -

conditions which are usually indicated locally)

It shouid be not~d that some additio~al status. indications and al~nns are

  • provided i*n *the controlroom or locally by most current designs.

We have. concluded that th'e above Cited monitoring, augmented by the periodic

  • .test and surveillance requirements inCluded in the.Technical Specifications, provide the. required assurance that the Class lE D.C... power system is ready

_ to perfonn its inter:ded safety function.

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