ML17312A528
| ML17312A528 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 12/14/1995 |
| From: | ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | |
| Shared Package | |
| ML17312A527 | List: |
| References | |
| NUDOCS 9602150113 | |
| Download: ML17312A528 (13) | |
Text
rom OI EmxINC uMnS azI oar PALO VERDE NUCLEARGENERATING STATION (PVNGS)
UNIT S CVCLE 6 Revision 1 9b02150113 9b0119 PDR ADOCK 05000528 P
Revision 1
CORK OPERATING LIMITSREPORT PALO VERDE NUCLEARGENERATING STATION (PVNGS)
UNIT1 CYCLE 6 REVISION HISTORY Revision Date 4/24/95 12/14/95
~Pa es Issue for Use (23 Total Pages)
Replace pages 1,3,4,6,7,8,9.
(23 Total Pages)
Page 3 of 23
j
Revision 1
CORE OPERATING LIMITSREPORT PALO VERDE NUCLEARGENERATING STATION (PVNGS)
UNIT1 CYCLE 6 This Core Operating Limits Report for PVNGS Unit 1 Cycle 6 has been prepared in accordance with the requirements ofTechnical Specification 6.9.1. The core operating limits have been developed using the NRC approved methodologies specified in Section 6.9.1.10 ofthe Palo Verde Unit 1 Technical Specifications.
AII'E TED PV TE HNI AL PE IFI ATI N 1) 3.1.1.2 Shutdown Margin - Reactor Trip Breakers Closed 2) 3.1.1.3 Moderator Temperature Coefficient 3) 3.1.2.7 Boron DilutionAlarms 4) 3.1.3.1 Movable Control Assemblies - CEA Position 5) 3.1.3.6 6) 3.1.3.7 7) 3.2.1 8) 3.2.3 9) 3.2.4 10) 3.2.7 11) 3.9.1 Regulating CEA Insertion Limits Part Length CEA Insertion Limits Linear Heat Rate Azimuthal Power Tilt-Tq DNBR Margin Axial Shape Index Boron Concentration RE PER TI v I.IVIITS The cycle-specific operating limits for the specifications listed are presented below.
3.1.1.2 - Shutdown Mar 'n - Reactor Tri Breakers losed The Shutdown Margin shall be greater than or equal to that shown in Figure 1.
.1.
- Moderator Tem erature Coefficient The moderator temperature coefficient (MTC) shall be within the area ofAcceptable Operation shown on Figure 2.
Page 4 of 23
Revision 1
1 1
PVNGS UNIT 1 CYCLE 6 CORE OPERATING LIMITSREPORT RE PERATIN LI IT NTIN ED 3.2.4-DNBR Mar 'n COLSS IN SERVICE and Both CEAC's INOPERABLE - Maintaining COLSS calculated core power less than or equal to COLSS calculated core power operation limitbased on DNBR decreased by the allowance shown in Figure 8.
COLSS OUT OF SERVICE and Either One or Both CEAC's are OPERABLE - Operating within the region of acceptable operation of Figure 9 using any operable CPC channel.
COLSS OUT OF SERVICE and CEAC's INOPERABLE - Operating withinthe region ofacceptable operation ofFigure 10 using any'operable CPC channel.
3.2.7-Axial Sha e Index The core average ALGALSHAPE INDEX(ASI) shall be maintained within the followinglimits:
-0.28 < ASI < 0.26 COLSS OUT OF SERVICE (CPC)
-0.20 < ASI < 0.20 3.9.
- Boron oncentration The boron concentration ofall filledportions of the Reactor Coolant System and the refueling canal shall be maintained at a uniform
,concentration greater than or equal to 2350 ppm.
Page 6 of 23
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Revision 1
PVNGS UNIT 1 CYCLE 6 CORE OPERATXNG LIMITSREPORT r~rY rWr aa
- 1. Shutdown Margin Versus Cold Leg Temperature, Reactor Trip Breakers Closed
) 1 2.
MTC Acceptable Operation, Modes 1 and 2.
3.
Core Power LimitAfter CEA Deviation.
- 6. Part Length CEA Insertion LimitVersus Thermal Power.
- 7. Azimuthal Power TiltLimitVersus Thermal Power (COLSS In Service).
8.
COLSS DNBR Power Operating LimitAllowance for Both CEACs Inoperable.
- 9. DNBR Margin Operating LimitBased on Core Protection Calculators (COLSS Out ofService, CEACs Operable) 10.DNBR Margin Operating LimitBased on Core Protection Calculators (COLSS Out ofService, CEACs Inoperable)
Page 7 of 23
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Revision I I
PVNGS UNIT1 CYCLE 6'CORE OPERATING LIMITSREPORT FIGURE 1
SHUTDOWN MARGINVERSUS COLD LEG TEMPERATURE Reactor Trip Breakers Closed (500, 6.5 5
A 4
~C) z
'1 Q 2z 0A D
2 ACCEPTABLE REGI N OF OPE TION (350 4.0) 100 200 300 400 500 600 COLD LEG TEMPERATURE ( F)
Page 8 of 23
J lt
0.5 ech. Spec. 3.1.1.3 aximum Upper imit p
o p 5 R
0 a".
U A
-2 g -2.5 C40 3
Cl0 -3.5 (0%, 0.3)
(20%, 0.1)
(0%, -3.1)
MTC AREA OF ACCEPTABLE OPERATION (50%, 0.0)
Beginning of Cycle limit End of Cycle limit (100%, 0.0)
(100%, -0.5)
(100%, -3.8) g 0
0 R0
-R Q
R j
60 0
P5 RQ g
0
-4.0 0
I
~
10 I
I I
I I
20 30 40 50 60 70 80 CORE POWER LEVEL,%OF RATED THERMALPOWER 90 100
r 1
l II