ML20043E389
| ML20043E389 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 06/05/1990 |
| From: | UNION ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML20043E387 | List: |
| References | |
| NUDOCS 9006120378 | |
| Download: ML20043E389 (4) | |
Text
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REACTIVITY CONTROL SYSTEMS I
$DERATORTEMPERATURECOEFFICIENT L
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LIMITING CONDITION FOR OPERATION 3.1.1. 3 The moderator temperature coefficient (MTC) shall bey w/,dri,, #A, //-//r i
-- q
~pn e t fie d in aa C.<a ese,% tih j
o a m aim 2 )
i p /imi4,g, LM positive thNcm/T fo'r po er vels up o
% RATED f
THERMAL POWER and a linear ramp from that point to O pcm/'F-
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at 100% RATED THERMAL POWER for the all rods withdrawn.
beginning of cycle life (BOL), condition + +n+
l
-A mA
-t-e-L;;; ne;etive then t.1 ; 10 i.k/k/*T for the eli r;d; withdr:un, and Of ;y:1; life (COL), MT 0 T";n"X TOR:R l
- nditi:r.
APPLICABILITY: p!;;;if t:_g af Cycle lide heL) LimM go,y; ente.
- ti:r 3.','.30. - MODES 1 and 2*#.
I Sp::i'i::ti:n 3.1.1.35. - MODES 1, 2 and 3#.
t&J of dye /a l', A ( ro d L.i m.'r' i
ACTION:
I
+ke COLk With the HTC more positive than theAlimis %ystSted in gol s
Op::ifi;. ti;n 3.1.1.30.
a.
4
- b:v;. operation in MODES 1 and 2 may proceed provided:
1.
Control rod withdrawal limits are established and maintained sufficient to restore the MTC to M thin the :b: n -it: Sol. //Mib, within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in HOT STANDIY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
/
These withdrawal limits shall be in addition to the insertion Ji limits of Specification 3.1.3.6; CQ, e..p,. a te g,
cou 2.
The control rods are maintained within the withdrawal limits established above until a subsequent calculation verifies that the MTC has been restored to within its limit for the all rods withdrawn condition; and 3.
A Special Report is prepared and submitted to the Comission l
pursuant to Specification 629.2 within 10 days, describing the value of the measured MTC, the interim control red withdrawal limits, and the predicted average core burnup necessar,y for restoring the positive MIC to within its limit for the all rods withdrawn condition, rou sfeet /?e d in +he COLA
\\
b.
With the MTC more negative than theAlimit Of :;;;ific::i:- 3.1.1.35.
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- b:v:, be in HOT SHUTDOWN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
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- With K,ff greater than or equal to 1.
- See Special Test Exception Specification 3.10.3.
CALLAWAY'- UNIT 1 3/4 1-4 Amendment No. 44 9006120378 900603 PDR ADOCK 0500 3
P
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POWER DISTRIBUTION LIMITS t
SURVEILLANCE REQUIREMENTS l
4.2.2.1 The provisions of Specification 4.0.4 are not applicable.
4.2.2.2 For Nomal Operation, F (z) shall be evaluated to detemine if Fg(7)
Q is within its limit by:
a.
Using the movable incere detectors to obtain a power distribution map at any THERML POWER greater than 5% of RATED THERMAL POWER.
i Increasing the measured F (z) component of the power distribution f
b.
Q map by 35 to account for manufacturing tolerances and further increasing the value by 5% to account for measurement uncertainties.
l c.
Satisfying following relationship:
T t W x Kf z) for P > 0.5 I
M Fq(z)i P x W(z)NO ht p
Fq(z)1M x K(z) for P 1'0. 5 4 Wawhead F M M
S W(z)NO x 0.5 af e 4,c h,#
cwe he yAb whereFd(z)isthemeasuredF(z)increa d by the allowances for Q
y8 l
me manufacturin tolerances and measuremen neertainty, 0.; 7.s tne Fo limit, X( ) is gh;; i-Fi;r; 3.0 2. P is the relative THERMAL d
POWER, and W z)Nn is the cycle dependent Normal Operation function g(c) aa/
that accounts foF power distribution transients encountered during i
Nomal Operation. AThis f=:th; i: h4 the^";;tia; F::t:r O/"* Nd$ '
W%, ' re Limig Report as per Specification 6.9..
W s
Jfeu k M
L d.
Measuring FQ(z)accordingtothefollowingscheu 1.
Upon achievkng equilibrium conditions after exceeding, by 10%
or more of RATED THERMAL POWER, the THERMAL POWER at which F(z)waslastdetermined,*or Q
2.
At least once per 31 Effective Full Power Days (EFPD), whichever occurs first.
l i
l
- During power escalation at the beginning of each cycle, power level may be increased until a power level for extended operation has been achieved and l
a power distribution map obtained.
a CALLAWAY - UNIT 1 3/4.!-6 Amendment No. ?#, 44 o
l
.- ~
7 i.
POWER DISTRlBUTION LIMITS
.y C
SURVEILLANCE REQUIRE T NTS (Continued) 4.2.2.3 RE!rRICTED AFD OPERATION (RAFDO) is permitted at powers above APLND if the following conditions are satisfied:
a.
Prior to entering RAF00, maintain THERMAL POWER above APLND and less than or equal to that allowed by Specification 4.2.2.2 for at least the previous 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Maintain RAFD0 surveillance (AFD within-*M As- /wh tje,c/hr/ Of t:rs;t fh: diff;r:n;:) during this time period.
RAFD0 is then APLgd providing THERMAL POWER is maintained between APLND l per m cog F0 IVry3 11ance is maintained pursuant to Specification 4.2.2.4.
1 i
APLWW is defined as:
w APLRAFD0 = minimum x K(t)
'x 1005 l
s M(z)xW(z))AFD0 over z
,7 L
where:
F$(z) is the measured F (z) increased by the allowances for Q
manufactuPing) tolerances and measurement unr,trtainty. The Fg limit pm F
is L
is 9... la Tiv.
3.2-. W(z)RAFD0isthecycle l
1 p
dependent function that accounts for limited pcwer distrihotian t
f;n:ti;n i: G I
transients encountered during RAFD0 A Thi:
gification 6.9.1. N;:n g th.eS t' " b
-F: ding Fee 4ee Limit 4 Report as per
/
i Co,s o erude S
Af ab a4 IJh&
DurIng Rads 0, if the THERMAL POWER i decreased below apt.bo a.rs l
b.
then the conditions of 4.2.2.3.a shall be satisfied before re-entering RAFDO.
During RAF00, F (z) shall be evaluated to determine if F (z) is 4.2.2.4 Q
Q within its limits by:
a.
Using the movable incere detectors to obtain a power distribution l
map at any THERMAL POWER above APLND, Increasing the measured F (z) component of the power distribution b.
Q map by 3% to account for manufacturing tolerances and further increasing the value by 5% to account for measurement uncertainties.
a l
3atisfyinge following relationship:
c.
Fh(z)5,bxX(z)
ND for P > APL P x W(z)RAF00 g
given$(z)isthemeasuredF(z).
Q The FO licit is
. -Kfz-)-
l where:
F h
f(E),
i:
in Fign: 2.2 2.
P is the relative THERMAL POWER. W(Z)RAFD0 g 'gsa) is the cycle dependent function that accounts for limited power ar e.
0 distribution transients encountered during RAF00.
This function '
Oding F:ct:r Limig Report as per Specification 6.9.1.9.
in the spec;/kg "
CALLAWAY - UNIT 1 3/42-7(a)
Amendment No. JA, 44 e
m
j POWER O!STRIBUTION LIMITS a).
BASES 3/4.2.2 and 3/4.2.3 HEAT FLUX HOT CHANNEL FACTOR AND NUCLEAR ENTHAIPY RISE Hp;gMN,NELFACTOR (Continued)
(IM fu YANTAGE 5 fuel) and the appropriate fuel rod bow DNBR penalty (less I
than 1.5t per WCAP-8691 Rev.1). The margin between design and safety analysis DNBR limits of 6.3% for Optimized fuel and 17.4% for VANTAGE 5 fuel includes 3
greater than 31 margin for both Optimized fuel and VANTAGE 5 fuel for plant design flexibility..
The hot channel factor F (z) is measured periodically and. increased by a j
cych and heignt dependent power factor' appropriate to eithe'r Normal Operation or RESTRICTED AFD OPERATION, W(2)g c' W(z)RAF30, to provide assurance that i
the limit on the hot channel factor F (z), is met. W(2)NO accounts for the' q
eftvets of normal operation transients and was detemined from expected power control maneuvers over the full range of burnap conditions in the core.
W(z)RAFD0 accounts for the more restrictive operating limits required by RESTRICTED AFD OPER T N which result in less severe transient values. The W(z) functions ar mQn the ";;kir.; F;;;;- LimigReport per Specifica-tion 6.9.1.9.
So,. Operdmg Provisions to account for the possibility of decreases in margin to the FQ(z) limit during intervals between surveillances are provided. Any decrease in the minimum margin to the F0(z) limit compared to the minimum margin detemined
/
from the previous flux map is determined by comparing the ratio of:
Fh(z) h maximum over z l
g(g))
taken from the current map to the same ratio from the previous map. The ratios L
tu be compared from the two flux maps do not need to be calculated at identical z locations.
Increases in this ratio indicate that the minimum margin to the F (z) limit has decreased and that additional penalties must be applied to the Q
measured F (z) to account for further decreases in margin that could occur Q
before the next surveillance. More frequent surveillances may also be substi-tuted for the additional penalty.
3/4.2.4 OUADRANT POWER TILT RATIO TheQUADRINTPOWERTILTRATIOlimitassuresthattheradialpowerdistri-bution satisfies the design values used in the power capability analysis.
Radial power distribution measurements are made during STARTUP testing and periodically during power operation.
The limit of 1.02, at which corrective action is required, provides DNB and linear heat generation rate protection with x-y plane power tilts. A CALLAWAY - UNIT 1 B 3/4 2-5 Amendment No. 15,28, 44