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  
Issue date: 11/01/1979
From:
COMMONWEALTH EDISON CO.
To:
Shared Package
ML17174A103 List:
References
NUDOCS 7911060359
Download: ML17174A106 (6)
v • d • e


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 )( 106 lb/hr and gt'cater.

'Wheres S

  • setting in per cent of rated power

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

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.
  • ~.. F1 *"' sc~'.:t,,.,..i"D Sc 1*.L1-~ (R,.1-uel or

,.,. ""J

.....~..

i..... "R

\\iJ.

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

r-*.

\\._

o*.. n 1.1. SAFE.TY Lntrr B. Core Th~rmal Po~"cr Limit* (Reactor Pr~~surc ~ 000 n~i~)

1~cn the rc~ctor prc~surc is < BOO psi& or core f 1011 is less thnn lOi.

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

1.

n1c neutron flux sh~ll not exceed the scrno setting established in Specification 2.1.A for longer th:m l.S seconds ns indicated by the process computer.

DPR-25

2.

\\.rneo the process coc?uter is out of service, 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.

. I 0

2.1 LIMITING SAFSr? SYSTEM SEl'TING.

3.

IRM Flux Scrnm Trt "O Setting

'file u.:*t flu~ scr~m sr.ttin3 shall be

  • set.:it *1ess th.:in or cqu.:il tQ 120/125' of full scale.

The APIU: rod block $<.:ttinc shall be:

s ~ [ o.saw0 + so]

The definitions used nbove for the APR."! scr.l!:I trip-.:ip:-ily.

7

100 0 w I-

<l cr eo I....

  • a

~

er w

3 0 n.

_J

(,Q -

er w

I,_

w er 0 u 40 --

. 0 --*--.. -

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

  • **;y'"

/

APRM SCRAM l I N [

( 0. 'j81-!J" 62 )

j I

I

  • r.;.t.. *i ur-~,~L I

ClilCUl,\\ 1 iON LINE

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

  • I

-~///

/

/

40

/,.

/

/

1::;~.~I Nfll., ( (')~"'." t.NT xruON

- 10J/10J ;-(;':*U'fc l 01'1 LINE r:-~ Oil li A I 1 IJC f.< IC I ON

~.UI., :;Ji< I D r-=:::-.J l;Y N. r. D 0.

  • !11 G 7
  • 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 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

/

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

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

~::in Sv::;tc~(l) l 2

1 l

3 3

3 7.(S) 2(5)(61 DPR-25 I~STRt1M...'l:"Nl'AT!CN TP.AT tNITL-~TES ROD BLOc~

Table 3.2.3 Instr~c~n~t~~~~....;..~~~~-!--=--=T~r-i~~;-::Le=-=-~~-e~l~S~~~t~t~i~~~*a::;.__

A??.!1 upscale (flow bi~s) (7)

'°(

  • J LTPF

-. o.5awn + 50 TPr" AP~l -upsca!.~ (~e!'u<?l ~nd Startup/Hot Stanoby r.:oo~)

A?f-l-1 do*wnscale ( 7)

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

i-Rod block monitor dO'A~scale (7)

IP~l dcwnse&le (3)

IRM up~cale

  • Ir""~ det'?ctor not fully ins~rted
  • in the cor~

SRM detector not in ctartup posi~ion

~ 12/125 full ~ca.le

~ 3/125 full scale 0.65 w0 + 42 Z 5/125 full scale

> 5/125 full seal~

~108/125 full.seal~

(4)

(2)

( 2) '

.e

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 12-

3.
4.
s.

l I

b bl

'-h "r>

It

  • J d - P""':\\l
  • l t.!~ co;:e n~~o.. no.:.
? oper<i e in '-

~

... ".ln po=a..::ton an

  • -\\. J\\.:.

c..c-.*:r.scc:i 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.

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

IP...M c:iownscule rn~.y be bypassed when it is on its lowest_ rc:nge~

Tnis function may be bypassed -when th~ count rate is ~100 cps.

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}.

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