ML17174A106

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Proposed Tech Spec Changes 1.1-3.2.3 to Permit Reactor Power Ascension to Proceed Along Modified Power/Flow Line,For Dresden Facility
ML17174A106
Person / Time
Site: Dresden  Constellation icon.png
Issue date: 11/01/1979
From:
COMMONWEALTH EDISON CO.
To:
Shared Package
ML17174A103 List:
References
NUDOCS 7911060359
Download: ML17174A106 (6)


Text

ATTACHMENT 2 PROPOSED TECHNICAL SPECIFICATION CHANGES FOR DRESDEN 3

(~-)

i-y .. ' . . .

DPR...,25 1.1 SAFErY LIHIT 2.1 LIMITING SAFETY SYSTEM SE'ITING

1. APR:1 Fl'JX Scra.n Tr1 u Settiniz {nun :~<Y.!c)

\..'hen the rcnctor mode switch is in the run position, the APR!i flux scram setting shall bci S ~ fa. 58Wo + 6;1 . fi,TPFl L ] LTPFJ

  • vi th ~ m<J.Ximum sc t poi.n t of 120%
  • fo.r core nov equal to 9a )( 10 6 lb/hr and gt'cater.

'Wheres S

  • setting in per cent of rated power

-= percent of drive flow required to pro-duce a rated core flow of 98 Mlb/hr.

I TPF

  • LTPF-unless the ~o~b1nat1on of power and peak LHGR is above th~ curve 1n Fieurc 2.1-2 c.t w!i:!.ch po1.:1t the actual J>e~~in~ factor value shall be used.

LTFF 0 3.05(7X7 fuel assemblies)

3. 01 (8X8. fuel assemblies)
2. *~

""J F 1.... *"'

........,.. sc~'.:t

.....~ .. ,,.,..i"D

- ... Sc 1i..*.L1-~

... "R (R,.1-uel

\iJ. or Sti.rtu;, ~.~rl. Hot Standby Mcxh? 2.

~.;;,,~!' t!1~ rc<ictot r:io~k S'-ri tch is in tile re.!'\:cl oi* Stilrt:1p/h1it st:io<lby posi-tion, the ~pj>J', sc rn;;i sh~ 11 be :;ct at lc~;s* t!10.n or equal to lSI of rnted neutron

  • f 1\IX, 6

o* . *.. ..-"

. I r-*..

\._ n ' . 0 DPR-25 1.1 .SAFE.TY Lntrr 2.1 LIMITING SAFSr? SYSTEM SEl'TING.

B. Core Th~rmal Po~"cr Limit* (Reactor Pr~~surc ~ 000 n~i~)

3. IRM Flux Scrnm Trt "O Setting

'file u.:*t flu~ scr~m sr.ttin3 shall be 1~cn the rc~ctor prc~surc is < BOO *set .:it *1ess th.:in or cqu.:il tQ 120/125' of psi& or core f 1011 is less thnn lOi. full scale.

of r~tcd, the ~ore thermal power shall not exceed 25 percenc 0£ rated*

the:-mc.l po:.:er.

C. ro*.1er Tr:ln!>icnt The APIU: rod block $<.:ttinc shall be:

1. n1c neutron flux sh~ll not exceed the scrno setting established in Specification 2.1.A s ~ [ o.saw + so]

for longer th:m l.S seconds ns indicated by 0

the process computer.

The definitions used nbove for the APR."! scr.l!:I

2. \.rneo the process coc?uter is out of service, trip-.:ip:-ily.

thls :;afccy limit shall be assuocd to be c:i:c~cd~d if the neutron flux e:r:cce<ls the sora::i *

  • s<?.ttine cstnblishcd by Specification 2.1.A and a control rod scram docs not occur. .

D.. R~act.or V.a ter Level (Shutdo~n Condition)

\.11c:ic,,-cr the. re<Jctor is in the shutdO"..tn condition

  • vit:i irr~*Jiate<l fu~l in the reactor vessel, the

.v.1.ti:?r lc.vcl shall not be less thon that corrcs-.

p0ri<lin3 to 12 inchcc .-i!>ovc the top of the active f11!.!.l v!le.n it is :;c;1tcd in the cor.c.

7

DPR-25 ROD BLOCK APRM BACKUP SCRAM INT£ RCEPT LINE

/

  • **;y'"

ROD BLOCK lh IE HCEPT 100 POINT l!!~i61) - *

/

/

-~///

APRM SCRAM l I N[ (0 . 'j81-!J" 62 )

0 w ,. /

I- /

<l cr eo /

I.... I

  • a I

j

~

I er w I 3

0

n.
  • r.;.t.. *i ur-~,~L ClilCUl ,\ 1 iON 1::;~.~I Nfll., ( (')~"'." t.NT xruON

_J LINE - 10J/10J ;-(;':*U'fc l 01'1 LINE er (,Q -

w I

w er 0

u 40 --

  • --***---- r:-~ Oil li A I 1 IJC f.< IC I ON ~.UI ., :;Ji< I D r-=:::-.J l;Y N. r. D 0. - ;*!11 G7
  • Opc*;*atj n& on ;,i ngJ e Lo0p

\Ir N..-,_ti1rnl Ci1*cul<iti0n is LirnitccJ per '.1\'ch. :3p<'c:s;

'.\. (~J!. 3 ;*nil '< J;I\ .11 ru.11 o couoi i 10NS I '\!~.'LR r Ort [ I LOW

. 0 --*-- .. -

0 ~o 40

'----***** 100

\.JI* (Oiif rlO\..' RAH (;f 01 fhllD) r , c;\1;1 r 2. 1 - 3

( '.( 11[ l'.f. I IC)

/,l'i'1*1 11 (I..' 1111.~_, '.*I Ii."."'. lill f,! 111::'...llll' 10 1:'.HMr.~ 01*11.:.111:~. to~iD1l1<mS 18.B

/

DPR-25 I~STRt1M...'l:"Nl'AT!CN TP.AT tNITL-~TES ROD BLOc~

Table 3.2.3 C.r>~=<-.bl~ *In::;t.*

cr.a:'l:v:~ls Per

~::in Sv::;tc~(l) Instr~c~n~t~~~~....;..~~~~-!--=--=T~r-i~~;-::Le=-=-~~-e~l~S~~~t~t~i~~~*a::;.__

l A??.!1 upscale (flow bi~s) (7) '°( **

- . o.5awn + 50 J LTPF TPr" (2)

AP~l -upsca!.~ (~e!'u<?l ~nd Startup/Hot ~ 12/125 full ~ca.le Stanoby r.:oo~)

2 A?f-l-1 do*wnscale ( 7) ~ 3/125 full scale 1

  • Red bloci<:. moni~or up~cale (flow bias) (7l i~-

. 0.65 w0 + 42 ( 2) l 3

3 Rod block monitor IP~l IRM dcwnse&le (3) up~cale

  • dO'A~scale (7) Z 5/125 full

.-> 5/125 scale full seal~

~108/125 full.seal~

3 Ir""~ det'?ctor not fully ins~rted

  • in the cor~

7.(S) SRM detector not in ctartup posi~ion (4)

.e

---_:.. 2(5)(61

r-*\

i .

TA3!.::: 3.2.3 (cont) DPR-25

~:otcs:

  • 1. For the Star'ct;.p/~ot Standby a:ld Run positio:ls of the F.eactor ?-~'Jee Selector Switch,.

there* shaJ_l be two cpcrahic or trippzcl trip zys'.:cns f-::>r c~ch function, e;-:ccpt t~c S:i:..'~ rod blo6:s, IRM up5c~le, IR:*'l cio"m:.~cal.:? and !?..l*! <!t?t~ctor r.o~ ful!.y insert~d in l

t.!~ co;:e n~~o*.. no.:. b :? oper ...".ln po=a ..::ton an d *-\.

It

  • J * - P""':\l J\.:.

c..c-.*:r.scc:i l e, i\?.?.:*:

upscale (flow bias), RBM upscale, and RBM downscale need not be operable in the Startup/Hot St~r.db*,r :1:cc.i.c. If t11~ first col\:rr.;i c~:mot be ~~::.:.for o~:? of the t'.*~o tri? sys'tc~s, thi~ *c~~d{t.icn inciy c:;,:ist for t;.p t.o se*:cn :1.~y~ v:r.cvidcd tf..?:\: c1t:ring tf:(!t tir::c the operable system is functionally tcstcil im~cdi~tc~y an1 dnily thcrc~ftcr: if this co::ci t. ioa la st::: lons~r than zcvcn d':y:; the sys ten shall be tr ip?sd. If the first colu~n ca11not be m~t for b6th trip sy~tc~s, the systc~s shnll be tripped.

12- W~- nercent nf drive flo~ requ1red to produce a rated core flow of 98 Ml'bin/hr.:

3. IP. .M c:iownscule rn~.y be bypassed when it is on its lowest_ rc:nge~
4. Tnis function may be bypassed -when th~ count rate is ~100 cps.
s. One of the fo*.ir S?..1*1 inputs n<J.y be byp~sse_d.
6. This SP. n f"..lnction rna~t be bypnssed in the* higher IRM ranges when the IR.1'1 U:;?scale red block .is opcr<ibl~. e
7. Not required while performing low power physics tests at atrnospn~ric pressure during or after refueli:-ig at power levels not to exc(?~d 5 r-:.w (t}.