ML20199A212
| ML20199A212 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 10/20/1997 |
| From: | HOUSTON LIGHTING & POWER CO. |
| To: | |
| Shared Package | |
| ML20199A201 | List: |
| References | |
| NUDOCS 9711170101 | |
| Download: ML20199A212 (10) | |
Text
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en,.u, The Light company SOUTil TEXAS PROJECT
. ELECTRIC GENERATING STATION UNIT 2 CYCLE 6'
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CORE UPERATING LIMITS REPORT REVISION 1
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October 1997 9711170101 971105 PDR ADOCK 06000498 P
PDR Core Operating Limits Report Page 1 of 10 10/20/97 e
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m SOUTH Tf.XAs UNIT 2 CYcti 6 RtvisioN I OCTOBER 1997 e
1.0 CORE OPERATING LIMITS REPORT This Core Operating Limits Report for STPEGS linit 2 Cycle 6 has tren prepared in accordance with the requirements of Technical Specification 6.9.1.6. The core operating limits have been developed using the NRC approved rnethodologies specified in Technical Specification 6.9.1.6.
The Technical Specifications affected by this report are:
, 1) 3/4.1.1.3 MODERATOR TEMPERATURE COEFFICIENT LIMITS SHUTDOWN ROD INSERTION L.lMITS 2) 3/,4.1.3.5.
CONTROL ROD INSERTION LIMITS 3) 3I4.1.3.6' 4) 3/4.2.1 AFD LIMITS 5) 3/4.2.2 IIEAT FLUX llOT CHANNEL FACT. M 6) 3/4.2.3 NUCLEAR ENTilALPY RISE ilOT CilANNEL FACTOR 2.0 OPERATING LIMITS
.m The cycle specific parameter limits for the specifications listed in Section 1.0 are presented below.
2.1 MODERATOR TEMPERATURE COEFFICIENT (Specification 3.1.1.3):
2.1.1 The BOL, ARO, MTC shall be less positive than the limits shown in Figure 1.
4 2.1.2 The EOL. ARO, llFP, MTC shall be less negative than -6.12 x 10 ok/k/* F.
4 2.1.3 The 300 ppm, ARO, liFP, MTC shall be less negative than 5.22 x 10 Ak/k/* F (300 ppm Surveillance Limit).
i where: BOL stands for Beginning-of. Cycle Life EOL stands for End-of Cycle Life ARO stands for All Rods Out ilFP stands for liot Full Power (100% RATED TilERMAL POWER)
IlFP vessel average temperature is 589 ' F Cort Operating Umits Rqen Page 2 of 10 10/20/97 i
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Tim SOUTH TEXAS UNIT 2 CYCt16 REVislON 1 OCTOBER 1997 2.2 ROD INSERTION LIMITS (Specification 3.1.3.5 and 3.1.3.6):
2.2.1 All banks shall have the same Full Out Position (FOP) of at least 249 steps withdrawn but not exceeding 259 steps withdrawn.
2.2.2 The Control Banks shall be limited la physical insertion as speci0ed in Figure 2.
2.2.3 Individual Shutdown bank rods are fully with' drawn when the Bank Demand Indication is at the FOP atxt the Rod Group fleight Limiting Condition for Operation is satisfied (T.S. 3.1.3.1).
..s 2.3. AXIAL FLUX DIFFERENCE (Specification 3.2.1'):
A>'
AFD limits as required by Technical Specification 3.2.1 are determined by CAOC 2.3.1 Operations with an AFD target band of +3, -12%.
2.3.2 The AFD shall be maintained within the ACCEPTABLE OPERATION portion of Figure 3 as required by Technical Specifications.
2.4 IIEAT FLUX liOT CIIANNEL FACTOR (Specification 3.2.2):.
2.4.1 FnRTP 2,79, 2.4.2 K(Z) is provided in Figure 4.
2.4.3 The F,y limits for RATED TilERMAL POWER (F,yRTP) within specinc core planes hall be:
2.4.3.1 Less than or equal to 2.102 for all core planes containing Bank *D" control rods, and 2.4.3.2 Less than or equal to the appropriate core height-dependent value from Table I for all unrodded core planes.
2.43.3 PF,y = 0.2.
These F,y limits were used to confirm that the heat flux hot channel factor F (Z) will be n
limited by Technical Specification 3.2.2 assuming the most limiting axial power distributions expected to result for the insertion and removal of Control Banks C and D during operation, including the accompanying variations in the axial xenon and power distributions, as described in WCAP-8385. Therefore, these F,y limits provide assurance that the initial conditions assumed in the LOCA analysis are met, along with the ECCS
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Core Operating Umits Report Page 3 of to 10/20 S 7 y
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me south TEXAS UNIT 2 Cvet16 REVISION 1 OctosER 1997-i acceptance criteria of 10 CFR 50.46.
j 2.5 EPmlALPY RISE HOT CHANNEL FACTOR (Specification 3.2.3):
l Standard Fuel-
, VANTAGE SH Fuel 2.3.1 FanRTP g,49, pa,,RTP. g,337,
(
PF g = 0.3.
PF n = 0.3.
2.5.2 6
3 4
3.0 REFEREN. CES -
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litter from J. P. Sechrist (Westirighouse) tohave Hoppet (HL&P), "Unli ! Cycle 8 and Unit 2
.I f
Cycle 6 Revised Core Operating Limits Reports,'
October 20,1997.
t 3.2 NUREG 1346, Technical Specifications, South Tuas Project Unit Nos. I arx12.
s i
b 6
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' Core _ Operating Limits Report -
page 4 or to
.10/20/97.
L
u OC10DI.R 1997 W
m.ampe.he south TtxAs UNIT 2 CYCLE 6 IlEvi$loH I e
hy Figure 1 MTC versus Power Level
'7.0 Q F f'? 3 f M % ? s W YE yp*
- UNACCEPTABLE OPERATION a M,.
2 6.0 n W %qA--
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2.0
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ACCEPTABLE OPERATION "Edl y
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1.0 1
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O.0
-1.0
-2.0
-3.0 0.0 20.0 40.0 60.0 80.0 100.0 Relative Power (%)
Core Operating 1.imits Repon Page 5 of 10 10/20/97
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Soutti TLxAs UNIT 2 CYCLE 6 REVl5 TON 1 OCTOBER 1997 y
Figure 2 Control Rod imertion Limits' versus Power Icel ll (33.ase). 133 Stop overl.p (33.357): 13J 8 top overlap
'l (31,358)a til Step ove'rlap 360
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i l
f.P (31.3$3). til 8 top overlap
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(20,351): 114 Step Westep ((L,_
I ~~~T 20 (i.
3..),
i n Step oort.,
j (79,3891s 133 Step overlap
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(70,35714 134 Step overlap isI rt e I r
(77,355) til step overlap 330
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1
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(77.353) 116 Stop overlap
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j (7 6,3 f.1) : 114, Step Overlap
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~(75.349)a 113 8tep overlap
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300
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180
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I 160
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inus e i l
j 140 k"
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130
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30 l
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10 30 30 to
' 50 60 70 to to 100 121AT1YW poetER (t)
Control llank A is already withdrawn to Full Out Position.
Cort Operating Limits keport Page 6 of 10 10/20/97 w
m he Soutil TLxAs Unit 2 Cycts 6 REV1510N 1 O CTOllLR 1997 Figure 3 AFD 1.imks versus Itatal 'Ihennal l'ower 120 100
-11,90 11.,90 UNACCEPTABLE
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UNACCEPTABLE OPERATION g
3 opggArios i
80
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60 j
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f ACCEPTABLE T
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1 OPERAT10N j
-31,50 31,50 40 20
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-40
-30
-20
-10 0
10 20 30 40 50 Flu 01fferenes (&l) 1 Core Operating Limits Report Pete 7 of 10 10/20,"97 s.
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he S0011 TI:xAs UNIT 2 CYcti 6 RLVISION I OCTOBLR !?97 Figure 4 K(Z) Normalimi F (Z) versm Core lleight n
R 5if'...
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L<L 0.8 0
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z E 0.6 Core Elevation FQ K(z) b-0.0 ft 2.70 1.0 a,
a 0.4 7.0 ft 2.70 1.0 y
14.0 ft 2.498 0.925 0.2 s
mO O
Z 0
2 4
6 8
10 12 14 16 CORE HEIGHT (FT)
Core Operating 1,imits Report page g of to 10/20/97
m south TI.XAS UNIT 2 CYCLE 6 REVISION I OCTOBI.R 1997 Table 1 (Part 1 of 2)
Unrodded F,y for Each Core licight For Humups fnwn BOC to 10,000 MWD /MTU Core lleight Unrodded Core lleight Unrodded (Ft.)
F (Ft.)
F, ~
14.000 4.[4T 6.f.00 1 l 86 13.800 3.671 6.600 1.872 13.600 3.201 6.400 1.862 13.400 2.731 6.200 1.854 13.200 2.371 6.000 1.849 13.000 2.141 5.800 1.846 12.800 2.078-5.600 1.843
' 12.600 2.039 5.400
'l.841 12.400-2.020 5.200 1.842 12.200 1.992 5.000 1.846 12.000
-1.978 4.800 1.856 11.800 1.973 4.600 1.868 1 l~.6')0 1.977 4.400
'l.875 '
I 1.i90 1.987 4.200
~1.879 11.2)0 1.986 4.000 1.883 11.0 V 1.992 3.800 1.894 10.0 2 1.9%
3.600 1.910 10.600 1.984 3.400 1.925
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10.400 1.970 3.200 1.919 10.200 1.955 3.000 1.940 10.000 1.971 2.800 1.920 9.800 1.975 2.600 1.890 9.600 1.%9 2.400 1.864 9.400 1.960 2.200 1.843 9.200 1.951 2.000 1.837 9.000 1.949 1.800 1.824 8.800 1.949 1.600 1.818 8.600 1.949 1.400 1.828 8.400 1.942 1.200 1.826 8.200 1.931 1.000 1.838 8.000 1.918 0.800 2.017 7.800 1.915 0.600 2.355 7.600 1.918 0.400 2.778 7.400 1,920 0.200 3.201 7.200' l.915 0.000 3.623 7.000 1.902 Cote Operating Limits Report Page 9 of 10 10/20/97
T Soutil TEXAS UNIT 2 CYew 6 REvtsuN I OCTOBER 1997 Table I (Psit 2 of 2)
Unroddal F,y for Each Core lleight For Burnups from 10,000 MWD /MTU to EOC Core lleight Unrodded Core lleight Untodded (Ft.)
F, (Ft.)
F 14.000 3.Y3T 6.800 2.Y3T I3.800 3.028 6.600 2.138 13.600 2.725 6.400 2.142 13.400 2.422 6.200 2.145 13.200 2.213 6.000 2.144 13.000 2.113 5.800 2.141 i
< 12 800 2.073'.
5.600 2.141
'12.600 2.034 5.400-2.146 12.400
, 2.051 5.200.
2.166 -
12.200 2.050 5.000 2.180 12.000 2.041 4.800 2.186
- i1.800 2.027 4.600 2.173 11.600 2.026 4.400 2.151 11.400 2.033 4.200 2.124 11.200 2.046 4.000 2.092 11.000 2.063 3.800 2.066 10.800 2.076 '
3.600 2.043 10.600 2.077 3.400 2.027 10.400 2.071 3.200 2.010 10.200 2.074 3.000 1.990 10.000 2.086 2.800 1.967 9.800 2.110 2.600 1.935 9.600 2.138 2.400 1.901 9,400 2.164 2.200 1.866 9.200 2.189 2.000 1.841 9.000 2.203 1.800 1,821 8.800 2.212 1.600 1.807 8.600 2.215 1.400 1.799 8.400 2.209 1.200 1.797 8.200 2.202 1.000 1.807 8.000 2.193 0.800 1.864 7.800 2.I83 0.600 2.023 7.600 2.175 0.400 2.236 j;
7.400
-2.166 0.200 2.448 7.200 2.155 0.000 2.661 7.000 2.145 V
I Core Opera:ing Limits Repon Page 10 of 10
-10/20/97
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