ML18044A564

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Forwards Util 800121 & C-E 800131 Analyses of Line Break Inside Containment.Requests Evaluation.Analysis Safety Concern Deals W/Increased Containment Pressure Increase & Return to Reactor Power Following Accident
ML18044A564
Person / Time
Site: 05000000, Palisades
Issue date: 01/25/1980
From: Benaroya V
Office of Nuclear Reactor Regulation
To: Butler W, Novak T
Office of Nuclear Reactor Regulation
Shared Package
ML093450149 List: ... further results
References
FOIA-80-515, FOIA-80-555, TASK-15-02, TASK-15-2, TASK-RR NUDOCS 8002260120
Download: ML18044A564 (2)
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. :o ~~~l~ug~~-=--*--.. -. -. --- *-JA;~ 5 1980 1;.1.,n~i::r m...!Jn NRR READ ING ASB READING MEMORANDUM FOR: r*. Novak, Cti1 ef...

'Refactor Systems. B~anch, oss 1'

  • . "*:
  • w. *eutle~, :chief'*-
  • cont$fnmen~ Systems Branch FROM:*

_ v. Ben.aroya, ct11ef -. *: :.

  • . * *. * :". Auxi 11ary Systems Branc~, *. OSS.... ;. * * >**-.

1.*

. PALISADES. AC~IDENT ANALYSIS. - MAIN STEAM. LINE BREAK' INSIDE CONTAINMENT*

  • 'SUBJECT*: *

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Attach~d for your review ~nd evaiuatfon *i*s* t'h*~*subject ~ctiderit. anal~s.h:~:::. -_./;--

.. This analysis was requested by the staff a*s *a result of a potent tar. -

- * /. :

. 'ui'lresolve_d safety issue. identif'ied by $Orne. lfce.nsee~ of' plants *~1th :. *

    • manual 1.Y 'in.1tfated au~iliary feedwater systems (AFWSl.

The,issue arose.

  • as ~a *resu.lt-.of 'request111g such licensees to install an 'automatic 1~1t1ated *,

. AFWS.1 n accorda'nce wfth Lessons..learned (.NURE:G '0578) re.commendat 1on-. 2~1 : 7.a.:

'Completio!'l'*o.f implementatfon* pf t~is t;e(:ommen~ation' fs now;part*.. of Ta~k

  • II.E.1 of*Post-TMI *,tinp1ementat1on *Action Items*for.whfch ASB currently

.has* pr-1mary t~thn1ca1 -~evhiw ~spons1b1l1t.Y.~ _. *:* *".-; ; *,, * -.*.. :*...

  • The saf:i~ co~~ern :(if- ~he a~al;s~~:* deal~s.*w.1t; ~~~;~as-~d.. rio~~al~ment *.. :. >.'.
  • pressure increase. an.~.. p<>tent1~1. returQ' tp reactor power following a mafo

. steam or.mafn feed line breed< inside containment: Therefore;* CSB *1s. -

--. requested to* evaluate**the 1:ormer *concern an~ RSB is**requested* to. evaluate *.* -.

the latter concern. - '.,

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    • Base_d on* the enclosed analysis*, the'_ licensee pla.ns to submit an AFWS au.to*

.. * *inftfation system wh.tch delays AFW* flow" for. 2.. mfoutes_ f}fter the* pipe* break* "

  • and 1 fmf t AR/ flow to approximately 250 gpm/steam generator o*r 1 ess _based

. on *feed '11ne'_water. hammer considerations; ASB' can* acc~pt *this 'feature *if Rss:can verf.fy thiit this tf.!rie.. delay and fl_ow.Hmit will st1J1 res*ult in sufficient water leveJ 1n the intact ~team generator_to*matnta1n primary

.. system-he.at removal aft.er. the blowdown of t~e aff~~ted _$team generator,,*'..

  • . *particularly f9r the* main feed 1 ine,break irrside* containment case *. During *
  • the B&O tF.AFW system reliability *review. the licensee.stated that with

. foJ lowing loss -'o_f rnain feed.flow with 10,ss *of Offsite power~.

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.. Al so.RSB. should ve,r1 fy that no operatdr :action ts* required: in: 1 ess.than

  • 10, minutes to 1.solate the ~ffected SG and real fgn filiW valves to direct.

-AFW flow only 'to the intact* SG.~

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OFF.ICE~,"....'... '. ~,. *. : :...' '..... :......... :............ **.,',... *...... :... *.. -............ *.**.*.,. *"***....... *.**...........

SURNAME DATE~.... >.-:........ '-~... ". *.""..... :.. *.... ~

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

NRC FORM 318 (9*76) NRCM 02.10

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  • . s-. G-O~VERNr.*E"IT PRINTING OFFICE: !979-289-369.

. 8 002 2 6

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JAN 2 5 1980.

If these concerns cannot be resolveds ft may be necessary. tbat the AFW'.

system automatfc intt4tlt4ons,ntauncoofltafn logfc to automatically isolate

  • the affected SG and direct AFW flow only to the fntact SG.. This would
  • have* a major. impact on the AFW luto i nit1ation system des1 gn.

Al so 'other.*

  • *. measures. for minimizing occurrence of fe*ed water hanuner may have to be_ 1rnpl e-

.. mented

  • You are requested to eval ulf!e. the attached analysis add submit an* SER *.
  • direct to 8. *Silver, SEP to support thfs schedule.

P1_ease send copi~s o.f.,

.. any questfons and your 6RR to ASB and. I CSB.

If you have addi~fonal~techn1cal questions,.con~act_W. LeFave, x2776~.!

cc: w/o attachment R. Mattson v: Moore R. Denise

.R. S11 ver R. Re.id

w. Kane*

I. V111 al va R. Tedesco A. Schwencer D. Ziemann*

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cc:* w/attach111ent W. LeFave

  • P. Matthews R. Satterfield G. tafnas D. Thatcher
    • _ ls)

Victor Benaroya, Chief

  • Auxiliary Systems. B.rarich
  • D.1vis1on of Sy~tems. Safety

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OFF.ICE~. *°l!l?ltt...

1.os~. :~SB_*. \\f?........................................................................

'"R::~:: l ;f<tao:s ~c: {)~riya~ _ _L_ * ****.****.*.***..****.****.**.**.*.*.*******.**.*******..*******.*. *.

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