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{{#Wiki_filter:CORE OPERATING LIMITSREPORT PALO VERDE NUCLEAR GENERATING STATION (PVNGS)
UNIT 2 CYCLE 7 Revision 1 Page 1 of 23 9607080274 960628 PDR  ADQCK 05000528 P              PDR
 
Revision  1 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITSREPORT Table of Contents
~Descri  tion                                                      Revision 0  P~ae Cover Page                                                            gp Table of Contents                                                        1 Affected Technical Specifications                                                  4 CORE Operating Limits-3.1 1 1 Shutdown Margin - Reactor Trip Breakers Open
          ~ ~
3.1.1.2 Shutdown Margin - Reactor Trip Breakers Closed 3.1.1.3 Moderator Temperature Coefficient 3.1.2.7 Boron Dilution Alarms 3.1.3.1 Movable Control Assemblies - CEA Position 3.1.3.6 Regulating CEA Insertion Limits 3.1,3.7 Part Length CEA Insertion Limits 3.2.1 Linear Heat Rate 3.2.3 Azimuthal Power Tilt - Tq 3.2,4 DNBR Margin 3.2.7 Axial Shape Index 3.9.1 Boron Concenmtration (Mode 6)
List of Figures Figure 3.1.1.1-1 Shutdown Margin. Versus Cold Leg Temperature                    ja Reactor Trip Breakers Open Figure 3.1.1.2-1 Shutdown Margin Versus Cold Leg Temperature Reactor Trip Breakers Closed Figure 3.1.1.3-1 MTC Acceptable Operation, Modes    1 and 2 Figure 3.1.3.1-1 Core Power LimitAfter CEA Deviation                              10 Figure 3.1.3.6-1 CEA Insertion Limits Versus Thermal Power (COLSS in Service)
Figure 3.1.3.6-2 CEA Insertion Limits Versus Thermal Power                        12 (COLSS Out of Service)
Figure 3.1.3.7-1 Part Length CEA Insertion Limits Versus Thermal Power  0        13 Page 2 of 23
 
Revision  1 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITSREPORT Table of Contents (Continued)
~Dercri ri n                                                      ReviseiRn ¹  ~Pa  e Figure 3.2.3-1 Azimuthal Power TiltVersus Thermal Power                            14 (COLSS in Service)
Figure 3.2A-1 COLSS DNBR Operating LimitAllowance for Both                        15 CEAC's Inoperable Figure 3.2.4-2 DNBR Margin Operating LimitBased on the Core                        16 Protection Calculators (COLSS Out of Service, CEAC's Operable)
Figure 3.2A-3 DNBR Margin Operating LimitBased on the Core                        17 Protection Calculators (COLSS Out of Service, CEAC's Inoperable)
List of Tables                                                                    18 Table 3.1.2.7-1 Required Monitoring Frequencies for Backup Boron                  19 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for Keff> 0.98 Table 3.1.2.7-2 Required Monitoring Frequencies for Backup Boron                  20 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0:98 > Keff > 0.97 Table 3.1.2.7-3 Required Monitoring Frequencies for Backup Boron                  21 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.97 > Keff > 0.96 Table 3.1.2.7-4 Required Monitoring Frequencies for Backup Boron                  22 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.96 > Keff> 0.95 Table 3.1.2.7-5 Required Monitoring Frequencies for Backup Boron                  23 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for Keff < 0.95 Page 3 of 23
 
~ !
Revision 1 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT This Report has been prepared in accordance with the requirements of Technical Specification 6.9.1. The Core Operating Limits have been developed using the NRC approved methodologies specified in Section 6.9.1.10 of the Palo Verde Unit 2 Technical Specifications.
3.1.1.1  Shutdown Margin - Reactor Trip Breakers Open 3.1.1.2  Shutdown Margin - Reactor Trip Breakers Closed 3.1.1.3  Moderator Temperature CoefBcient 3.1.2.7  Boron Dilution Alarms 3.1.3.1  Movable Control Assemblies - CEA Position 3.1.3.6  Regulating CEA Insertion Limits 3.1.3.7  Part Length CEA Insertion Limits 3.2.1    Linear Heat Rate 3.2.3    Azimuthal Power Tilt- T<
3.2.4    DNBR Margin 3.2.7    Axial Shape Index Boron Concentration (Mode 6)
The cycle-specific operating limits for the specifications listed are presented below.
3.1..1 - Shutdown Mar 'n - Reactor Tri Breakers 0        en The Shutdown Margin shall be greater than or equal to that shown in Figure 3.1.1.1-1.
3.1.1.2 - Shutdown Mar 'n - Reactor.Tri    Breakers Closed The Shutdown Margin shall be greater than or equal to that shown in Figure 3.1.1.2-1.
Page 4of23
 
Revision j.
PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT R~  P    AT          TT, -      TIN Ji r  rTm r r            ffiin The moderator temperature coefficient (MTC) shall be within the area of Acceptable Operation shown in Figure 3.1.1.3-1.
1 2 7 -8  r n Dil  i n Al With one or both start-up channel high neutron flux alarms inoperable, the RCS boron concentration shall be determined at the applicable monitoring &equency specified in Tables 3.1.2.7-1 through 3.1.2.7-5.
1    1-    v I      ntrlA      m  li  -    A i'ith one or more full-length or part-length CEAs misaligned from any other CEAs in its group by more than 6.6 inches, the minimum required MODES    1 and 2 core power reduction is specified in Figure 3.1.3.1-1.
            -R    l in    EA In  rti n Limi One or more CEAC's OPERABLE: With COLSS IN SERVICE, regulation CEA groups shall be limited-to the withdrawal sequence and to the insertion limits shown in Figure 3.1.3.6-1; with COLSS QQT OF SERVICE, regulation CEA groups shall be limited to the withdrawal sequence and to the insertion limits shown in Figure 3.1.3.6-2.
3.1.3.7 - Part Len h CEA Insertion Limits One or more CEAC's OPERABLE: The part length CEA groups shall be limited to the insertion limits shown in Figure 3.1.3.7-1.
3.2.1 - Linear Heat Rate The linear heat rate  limit of 13.5 kW/ft shall  be maintained.
Page 5 of 23
 
Revision 1 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITSREPORT P    ER      I    I I    -      I    F 2  -  zm    h l    wr  'l The AZIMUTHALPOWER TILT (T<) shall be less than or equal to the limitin Figure 3.2.3-1 with COLSS IN SERVICE.
3.2.4 - DNBR Mar 'n COL'SS  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 3.2.4-1.
COLSS OUT OF SERVICE and Either One or Both CEAC's are OPERABLE - Oper'ating within the region of acceptable operation of Figure 3.2.4-2 using any operable CPC channel.
COLSS OUT OF SERVICE and CEAC's INOPERABLE - Operating within the region of acceptable operation of Figure 3.2.4-3 using any operable CPC channel.
27-Axi        h    In x The core average AXIALSHAPE INDEX (ASI) shall be maintained within the following limits:
COLSS OPERABLE
      - -0.188 < ASI 5 0.169 COLSS OUT OF SERVICE (CPC)
          -0.10 < ASI < 0.10
    .1-Brn        n  nr in    M The boron concentration of all Filled portions of the Reactor Coolant System and the refueling canal shall be maintained at a uniform concentration > 2500 ppm.
Page 6 of 23
 
Revision I PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITSREPORT T  ( i      E 3.1.1.1-1. Shutdown Margin Versus Cold Leg Temperature, Reactor Trip Breakers
~
Open 3.1.1.2-1. Shutdown Margin Versus Cold Leg Temperature, Reactor Trip Breakers Closed 3.1.1.3-1.      MTC Acceptable Operation, Modes  1 and 2.
3.1.3.1-1. Core Power  LimitAfter CEA Deviation.
3.1.3.6-1. CEA Insertion Limits Versus Thermal Power (COLSS In Service).
3.1.3.6-2. CEA Insertion Limits Versus Thermal Power (COLSS Out of Service) 3.1.3.7-1. Part Length CEA Insertion LimitVersus Thermal Power.
3.2.3-1.      Azimuthal Power Tilt LimitVersus Thermal Power (COI SS In Service).
3.2.4-1.      COLSS DNBR Power Operating      LimitAllowance for Both CEACs Inoperable.
3.2.4-2.
  ~ ~  ~    DNBR Margin Operating LimitBased on Core Protection Calculators (COLSS Out of Service, CEACs Operable) 3.2.4-3.      DNBR Margin Operating LimitBased on Core Protection Calculators (COLSS Out of Service, CEACs Inoperable)
Page 7 of 23
 
Revision 1 PYNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT FIGURE 3. 1. 1. 1 1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS OPEN N6 REGI N OF ACCE TABLE OPE    TION Y,
z REGION OF zW2                                          UNACC PTABLE 0                                            OPE    TION P1 U3 100      200          300    400      500        600 CO<.D ZZG    VZMi m~VURZ ('F)
Page 7a of 23
 
,V Revels>on 0 PVNGS UNIT 2 CYCLE 7 CORE OPERATlNG LlMlTS REPORT FIGURE 3.1.1.2 1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS CLOSED (soo,s.
~6 REGl N OF ACCE TABLE
) l5
                ,
OPER TION
~4 z
zW2                                        REGlON OF D                                        UNACCEPTABLE A
OPE    TION P1 CQ 100      200          300        400          500      600 COLD LEG TEMPERATURE                (F)
Page 8 of 23
 
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O                                      Er1d  of C M      s I                                    -------"Joie    Lirni]                                            33
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( 1 oox,-3.8)  e
          -4.0                                                                                            M XI                    10    20  30  40          50      60    70      80      90          100 0                      CORE POWER LEVEL (% OF RATED THERMAL POWHRj 0
C
    'Tj 0
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II Revision 0 PVNGS UNlT 2 CYCLE 7 CORE OPERATlNG LlMlTS REPORT FIGURE 3. 1.3. 1 1 CORE POWER LIMIT AFTER CEA DEVIATION
* 30 zC) 25 Vo 20
~p 0 %15
~~10 QO Z    0 10        20            30 40 TIMZ AFTZH DZVIATION, ) rri~uTZS
                                                '0              60
* WHEN CORE POWER IS REDUCED TO 55% OF RATED THERMAL POWER PER THIS LIMIT CURVE, FURTHER REDUCTION IS NOT REQUIRED Page 10 of 23
 
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                                  -
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GROUP 4                  GROUP 2                        0    z 150 120  90  60 30      0 150 120  90 60  30  0 CHA POSITION (INCFIES WITFIDRAWN)        .
0 C
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e Revision 0 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT FIGURE 3. 1.3.7 1 PART LENGTH CEA INSERTION LIMITS VERSUS THERMAL POWER 0
10                                                                                                    10 20                                                                                                    20 30                                                                                                    30 40                                                                                                    40 50                                                                                                    50 60                                                                                                    60 70                                                                                                    70 TRANSIENT INSERTION LIMIT 5.0 INCHES 80                                                                                                    80 OP ERATION                            OP ERATION                                            90 90 UNACCEPTABLE                            RESTRICTED 100                                                                                                    100 1 1.0                                  881S0S51505055S S S ~0                              I lt 0 5 1 5 0 0 5 0 0 0 0 5 a 5 5 0 5 0 ~
110
                                                                                                              \
LONG TERM STEADY STATE INSERTION LIMIT (112.5 INCHES)                                    120 120 130                                                                                                    130 OPERATION ACCEPTABLE 140                                                                                                    140 150                                                                                                    150 1.0  0.9  0.8    0.7  0.6    0.5    0.4    0.3            0.2          -0.1            0.0 FRACTION OF RATED THERMAL POWER Page 13 of 23
 
Revision 0 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT FIGURE 3.2.3 j.
AZIMUTHALPOthtER TILT VERSUS THERMAL PO)VER (COLSS IN SERVICE) 50 H  45 M  40 W 35                              REGION OF
~ 30 UNACCEPTABLE 25 OP ERATION C) p 20
+  10 20      30      40    50        60  70  80    90      100 PERCENT OF RATED THERMAL POWER Page 14 of 23
 
n                                    tO O
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z 2                                            o    U) 08 g                                            vn zo o~
  <o                                              n L-15                                          M 0 o+~o 0++ n n  3 Q                                            HOW~pl
:~x oQp    10 g Q n~'N~0m
  ~Q                                              n-I
                                                  ~~+XI I +~Z
                                                        ~+
Q  a Og                                                    I 5                                        o MK O                m O                0 03 V
n                                Ol O
0 0
lg      25          50            75    100 PERCENT OF RATED THERMAI, POWER
 
0 e        PVNGS UNlT 2 CYCLE 7 CORE OPERAT1NG LlM1TS REPORT Revision 0 FIGURE 3.2.4 2 DNBR MARGIN OPERATING LIMIT BASED ON THE CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, CEAC's OPERABLE) 2.5 ACCE TABLE CQ2>
Z                                            (0. 95, 2.25) 0.1, 2.25)
R 2.2 0.1, 2.14) p 2.0 NACC PTABLE 1.9
      -0.20  -0.15    -0.10  -0.05      0.00  0.05      0.10      0.15    0.20 CORE AVERAGE ASI Page 16 o( 23
 
Revision 0 PVNGS UNlT 2 CYCLE 7 CORE OPERATlNG LlMITS REPORT FIGURE 3.2.4' 3 DNBR MARGIN OPERATING LIMIT BASED ON THE CORE PROTECTION CALCULATORS-(COLSS OUT OF SERVICE, CEAC's INOPERABLE) 2.7 ACCE TABLE 2.6 CEAC's IN PERABLE (o.os 2 47~    o.1, 2.47
( 0.1, 234 NACC PTABLE 2.2                            OPER TION 2.1
  -0.20  -0.15    -0.10  -0.05      0.00    0.05    0.10      0.15    0.20 CORE AVERAGE ASI Page 17 o( 23
 
Revision  0 PVNGS UNIT 2 CYCLE,7 CORE OPERATING LIMITS REPORT LI T FTABL 3.1.2.7-1. Required Monitoring Frequencies for Backup Boron Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for K,g > 0.98.
3.j..2.7-2. Required Monitoring Frequencies for Backup Boron Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.98 > E,1I > 0.97.
3.j..2.7-3. Required Monitoring Frequencies for Backup Boron Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.97 > K,g > 0.96.
3.]..2.7-4. Required Monitoring Frequencies for Backup Boron Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.96 > E,ff) 0.95.
3.1.2.7-5. Required Monitoring Frequencies for Backup Boron Dilution Detection as
              'a Function of Operating Charging Pumps and Plant Operational Modes for E,g < 0.95.
Page 13 of 23
 
Revision 0 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIiVlITSREPORT TABLE 3.1.2.7-1 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTIONDETECTION AS A FUNCTION OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR K,ff> 0.98 Number of Operating Charging Pumps OPERATIONAL MODE 12 hours      1 hour      ONA        ONA 4 not on SCS              12 hours      1 hour      OiVA      ONA 5 not on SCS              8 hours        1 hour      ONA        ONA 4&5onSCS                  ONA            ONA        ONA        ONA Notes:  SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 19 of 93
 
Ke vision    U PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT TABLE 3.1.2.7-2 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTIONDETECTION AS A FUNCTIOlil OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR 0.98 > off> 0.97 Number of Operating Charging Pumps OPERATIONAL MODE 12 hours      2 hours      0.5 hours  ONA 4 not on SCS              12 hours      2.5 hours    1 hour      0.5. hours 5 not on SCS              8 hours      2.5 hours    1 hour      0.5 hours 4 Bc 5 on SCS            8 hours'.5        hours    ONA        ONA Notes:  SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 20 of 23
 
Revision 0 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITSREPORT TABLE 3.1.2.7-3 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTIONDETECTION AS ADJUNCTION OF OPERATIiNG CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR 0.97 > Kg ff) 0;96 Number of Operating Charging Pumps OPERATIONAL MODE 3
12 hours      3.5 hours    1.5 hours    0.5 hours 4 not on SCS              12 hours      3.5 hours    1.5 hours  -.1 hour 5 not on SCS              8 hours        3.5 hours    1.5 hours    1 hour 4 & 5 onSCS              8 hours        1 hour      0.5 hours    ONA Notes:  SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 21  of 23
 
Revi'sion    0 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIiVIITSREPORT TABLE 3.1.2.7-4 REQUIRED MONITORING FREQUENCIES FOR BACKUP BOROiN DILUTIONDETECTION AS A FUNCTION OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR 0.96 > K,ff> 0.95 Number of Operating Charging Pumps OPERATIOiNAL iMODE 12 hours      5 hours      2 hours      1 hour 4 not on SCS              12 hours  "  5 hours      2 hours      1 hour 5 not on SCS              8 hours      5 hours      2 hours      1 ho'ur 4%5onSCS                  8 hours      2 hours      0.5 hours    ONA Notes:  SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 22  of 23
 
Revision    0 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT TABLE 3.1.2.7-5 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTIONDETECTION AS A FUNCTIOiN OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR K,g < 0.95 Number of Operating Charging Pumps OPERATIOiNAL MODE.
12 hours      6 hours    2.5 hours    1.5 hours 4 not on SCS              12 hours      6 hours    3 hours      1 5 hours 5 not on SCS              8 hours        6 hours    3 hours    1.5 hours 4& 5 onSCS                8 hours        2 hours    1 hour      0.5 hours 6 (> 4000 ppm)            24 hours      8  hours  4 hours      2 hours 6 (< 4000 ppm)            24 hours      2 hours    0.5 hours    ONA Notes:  SCS = Shutdown Cooling System ONA = Operation not allowed Page 23  of 23}}

Revision as of 08:53, 29 October 2019

Rev 1 to PVNGS Unit 2 Cycle 7 Colr.
ML17312A830
Person / Time
Site: Palo Verde  Arizona Public Service icon.png
Issue date: 06/28/1996
From:
ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:
Shared Package
ML17312A827 List:
References
NUDOCS 9607080274
Download: ML17312A830 (36)
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Text

CORE OPERATING LIMITSREPORT PALO VERDE NUCLEAR GENERATING STATION (PVNGS)

UNIT 2 CYCLE 7 Revision 1 Page 1 of 23 9607080274 960628 PDR ADQCK 05000528 P PDR

Revision 1 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITSREPORT Table of Contents

~Descri tion Revision 0 P~ae Cover Page gp Table of Contents 1 Affected Technical Specifications 4 CORE Operating Limits-3.1 1 1 Shutdown Margin - Reactor Trip Breakers Open

~ ~

3.1.1.2 Shutdown Margin - Reactor Trip Breakers Closed 3.1.1.3 Moderator Temperature Coefficient 3.1.2.7 Boron Dilution Alarms 3.1.3.1 Movable Control Assemblies - CEA Position 3.1.3.6 Regulating CEA Insertion Limits 3.1,3.7 Part Length CEA Insertion Limits 3.2.1 Linear Heat Rate 3.2.3 Azimuthal Power Tilt - Tq 3.2,4 DNBR Margin 3.2.7 Axial Shape Index 3.9.1 Boron Concenmtration (Mode 6)

List of Figures Figure 3.1.1.1-1 Shutdown Margin. Versus Cold Leg Temperature ja Reactor Trip Breakers Open Figure 3.1.1.2-1 Shutdown Margin Versus Cold Leg Temperature Reactor Trip Breakers Closed Figure 3.1.1.3-1 MTC Acceptable Operation, Modes 1 and 2 Figure 3.1.3.1-1 Core Power LimitAfter CEA Deviation 10 Figure 3.1.3.6-1 CEA Insertion Limits Versus Thermal Power (COLSS in Service)

Figure 3.1.3.6-2 CEA Insertion Limits Versus Thermal Power 12 (COLSS Out of Service)

Figure 3.1.3.7-1 Part Length CEA Insertion Limits Versus Thermal Power 0 13 Page 2 of 23

Revision 1 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITSREPORT Table of Contents (Continued)

~Dercri ri n ReviseiRn ¹ ~Pa e Figure 3.2.3-1 Azimuthal Power TiltVersus Thermal Power 14 (COLSS in Service)

Figure 3.2A-1 COLSS DNBR Operating LimitAllowance for Both 15 CEAC's Inoperable Figure 3.2.4-2 DNBR Margin Operating LimitBased on the Core 16 Protection Calculators (COLSS Out of Service, CEAC's Operable)

Figure 3.2A-3 DNBR Margin Operating LimitBased on the Core 17 Protection Calculators (COLSS Out of Service, CEAC's Inoperable)

List of Tables 18 Table 3.1.2.7-1 Required Monitoring Frequencies for Backup Boron 19 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for Keff> 0.98 Table 3.1.2.7-2 Required Monitoring Frequencies for Backup Boron 20 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0:98 > Keff > 0.97 Table 3.1.2.7-3 Required Monitoring Frequencies for Backup Boron 21 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.97 > Keff > 0.96 Table 3.1.2.7-4 Required Monitoring Frequencies for Backup Boron 22 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.96 > Keff> 0.95 Table 3.1.2.7-5 Required Monitoring Frequencies for Backup Boron 23 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for Keff < 0.95 Page 3 of 23

~ !

Revision 1 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT This Report has been prepared in accordance with the requirements of Technical Specification 6.9.1. The Core Operating Limits have been developed using the NRC approved methodologies specified in Section 6.9.1.10 of the Palo Verde Unit 2 Technical Specifications.

3.1.1.1 Shutdown Margin - Reactor Trip Breakers Open 3.1.1.2 Shutdown Margin - Reactor Trip Breakers Closed 3.1.1.3 Moderator Temperature CoefBcient 3.1.2.7 Boron Dilution Alarms 3.1.3.1 Movable Control Assemblies - CEA Position 3.1.3.6 Regulating CEA Insertion Limits 3.1.3.7 Part Length CEA Insertion Limits 3.2.1 Linear Heat Rate 3.2.3 Azimuthal Power Tilt- T<

3.2.4 DNBR Margin 3.2.7 Axial Shape Index Boron Concentration (Mode 6)

The cycle-specific operating limits for the specifications listed are presented below.

3.1..1 - Shutdown Mar 'n - Reactor Tri Breakers 0 en The Shutdown Margin shall be greater than or equal to that shown in Figure 3.1.1.1-1.

3.1.1.2 - Shutdown Mar 'n - Reactor.Tri Breakers Closed The Shutdown Margin shall be greater than or equal to that shown in Figure 3.1.1.2-1.

Page 4of23

Revision j.

PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT R~ P AT TT, - TIN Ji r rTm r r ffiin The moderator temperature coefficient (MTC) shall be within the area of Acceptable Operation shown in Figure 3.1.1.3-1.

1 2 7 -8 r n Dil i n Al With one or both start-up channel high neutron flux alarms inoperable, the RCS boron concentration shall be determined at the applicable monitoring &equency specified in Tables 3.1.2.7-1 through 3.1.2.7-5.

1 1- v I ntrlA m li - A i'ith one or more full-length or part-length CEAs misaligned from any other CEAs in its group by more than 6.6 inches, the minimum required MODES 1 and 2 core power reduction is specified in Figure 3.1.3.1-1.

-R l in EA In rti n Limi One or more CEAC's OPERABLE: With COLSS IN SERVICE, regulation CEA groups shall be limited-to the withdrawal sequence and to the insertion limits shown in Figure 3.1.3.6-1; with COLSS QQT OF SERVICE, regulation CEA groups shall be limited to the withdrawal sequence and to the insertion limits shown in Figure 3.1.3.6-2.

3.1.3.7 - Part Len h CEA Insertion Limits One or more CEAC's OPERABLE: The part length CEA groups shall be limited to the insertion limits shown in Figure 3.1.3.7-1.

3.2.1 - Linear Heat Rate The linear heat rate limit of 13.5 kW/ft shall be maintained.

Page 5 of 23

Revision 1 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITSREPORT P ER I I I - I F 2 - zm h l wr 'l The AZIMUTHALPOWER TILT (T<) shall be less than or equal to the limitin Figure 3.2.3-1 with COLSS IN SERVICE.

3.2.4 - DNBR Mar 'n COL'SS 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 3.2.4-1.

COLSS OUT OF SERVICE and Either One or Both CEAC's are OPERABLE - Oper'ating within the region of acceptable operation of Figure 3.2.4-2 using any operable CPC channel.

COLSS OUT OF SERVICE and CEAC's INOPERABLE - Operating within the region of acceptable operation of Figure 3.2.4-3 using any operable CPC channel.

27-Axi h In x The core average AXIALSHAPE INDEX (ASI) shall be maintained within the following limits:

COLSS OPERABLE

- -0.188 < ASI 5 0.169 COLSS OUT OF SERVICE (CPC)

-0.10 < ASI < 0.10

.1-Brn n nr in M The boron concentration of all Filled portions of the Reactor Coolant System and the refueling canal shall be maintained at a uniform concentration > 2500 ppm.

Page 6 of 23

Revision I PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITSREPORT T ( i E 3.1.1.1-1. Shutdown Margin Versus Cold Leg Temperature, Reactor Trip Breakers

~

Open 3.1.1.2-1. Shutdown Margin Versus Cold Leg Temperature, Reactor Trip Breakers Closed 3.1.1.3-1. MTC Acceptable Operation, Modes 1 and 2.

3.1.3.1-1. Core Power LimitAfter CEA Deviation.

3.1.3.6-1. CEA Insertion Limits Versus Thermal Power (COLSS In Service).

3.1.3.6-2. CEA Insertion Limits Versus Thermal Power (COLSS Out of Service) 3.1.3.7-1. Part Length CEA Insertion LimitVersus Thermal Power.

3.2.3-1. Azimuthal Power Tilt LimitVersus Thermal Power (COI SS In Service).

3.2.4-1. COLSS DNBR Power Operating LimitAllowance for Both CEACs Inoperable.

3.2.4-2.

~ ~ ~ DNBR Margin Operating LimitBased on Core Protection Calculators (COLSS Out of Service, CEACs Operable) 3.2.4-3. DNBR Margin Operating LimitBased on Core Protection Calculators (COLSS Out of Service, CEACs Inoperable)

Page 7 of 23

Revision 1 PYNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT FIGURE 3. 1. 1. 1 1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS OPEN N6 REGI N OF ACCE TABLE OPE TION Y,

z REGION OF zW2 UNACC PTABLE 0 OPE TION P1 U3 100 200 300 400 500 600 CO<.D ZZG VZMi m~VURZ ('F)

Page 7a of 23

,V Revels>on 0 PVNGS UNIT 2 CYCLE 7 CORE OPERATlNG LlMlTS REPORT FIGURE 3.1.1.2 1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS CLOSED (soo,s.

~6 REGl N OF ACCE TABLE

) l5

,

OPER TION

~4 z

zW2 REGlON OF D UNACCEPTABLE A

OPE TION P1 CQ 100 200 300 400 500 600 COLD LEG TEMPERATURE (F)

Page 8 of 23

(Ox,O.5)---- Te h.

ec.'

~3M@omum U A er Umif 0.0 ----- '9'"'"<<f ('ZGIe Limit (50x, 0.0) (100x, 0)

O (100r, -0.2) K

-0.5 A c 9

K A A

-1.0 INTC AREA OF M

0

-1.5

"<n p~0 ACCEPTABLE P3Qm oCX

~A 0 K Q -2.0 WO OPERATION 'A 43 m 0

Q ~m0 "lO TI

~

A -2.5 0 G3 mz 1

~

4 0 I

@~a

-3.0 -3.1) 0 (Ox, U

O Er1d of C M s I -------"Joie Lirni] 33

-3.5 0

( 1 oox,-3.8) e

-4.0 M XI 10 20 30 40 50 60 70 80 90 100 0 CORE POWER LEVEL (% OF RATED THERMAL POWHRj 0

C

'Tj 0

O

II Revision 0 PVNGS UNlT 2 CYCLE 7 CORE OPERATlNG LlMlTS REPORT FIGURE 3. 1.3. 1 1 CORE POWER LIMIT AFTER CEA DEVIATION

  • 30 zC) 25 Vo 20

~p 0 %15

~~10 QO Z 0 10 20 30 40 TIMZ AFTZH DZVIATION, ) rri~uTZS

'0 60

  • WHEN CORE POWER IS REDUCED TO 55% OF RATED THERMAL POWER PER THIS LIMIT CURVE, FURTHER REDUCTION IS NOT REQUIRED Page 10 of 23

lj t

0.

A 0.

A O 0. Z zC 0gi~

9 0 R 0 0.

~

e+<

mm>

z 33+01

~porn~

0. W 0 ~

Hrp Z+cn ~'Z0 'o

~

+ Mjn

~

rg z ~ QQz Q 0

0.

m*'%m M~6~

+

u) go M 0.

m Mao

~ Xf MX'~l 0 0.

t

~M~ m 0.

0 Z 0 ~Z m3 X

0. m N

K GROUP 5 GROUP 3 GROUP 1 K g 150 120 90 60 30 0 150 120 90 60 30 0 150 120 90 60 30 0 0

-

GROUP 4 GROUP 2 0 zt 150 120 90 60 30 0 150 120 90 60 30 0 A

cEA r osrhoN (mcHas wtTrtDaAwN) 0 C

0 J

O

0.

0.

A A

(z O

l4

0. z 9 U) 0 0.

p'I C

pg zx ~n.OM

0. OI~ rn+~

~m'0 0 'Z (g

Z~

~L-< n

0. XI Ol ZQcl Mg m fll ~

rg O~C 4 0.

Q~

I I

gDZ C~~o MWO N

Q O W."

0.

Maes ~gF 0 C) g MMG3m t C g)

"d 0 O

0.

A >No GROUP 5 GROUP 3 GROUP 1 0) 150 120 90 60 30 0 150 120 -

90 60 30 0 150 120 90 60 30 0 0

GROUP 4 GROUP 2 0 z 150 120 90 60 30 0 150 120 90 60 30 0 CHA POSITION (INCFIES WITFIDRAWN) .

0 C

0 O

e Revision 0 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT FIGURE 3. 1.3.7 1 PART LENGTH CEA INSERTION LIMITS VERSUS THERMAL POWER 0

10 10 20 20 30 30 40 40 50 50 60 60 70 70 TRANSIENT INSERTION LIMIT 5.0 INCHES 80 80 OP ERATION OP ERATION 90 90 UNACCEPTABLE RESTRICTED 100 100 1 1.0 881S0S51505055S S S ~0 I lt 0 5 1 5 0 0 5 0 0 0 0 5 a 5 5 0 5 0 ~

110

\

LONG TERM STEADY STATE INSERTION LIMIT (112.5 INCHES) 120 120 130 130 OPERATION ACCEPTABLE 140 140 150 150 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 -0.1 0.0 FRACTION OF RATED THERMAL POWER Page 13 of 23

Revision 0 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT FIGURE 3.2.3 j.

AZIMUTHALPOthtER TILT VERSUS THERMAL PO)VER (COLSS IN SERVICE) 50 H 45 M 40 W 35 REGION OF

~ 30 UNACCEPTABLE 25 OP ERATION C) p 20

+ 10 20 30 40 50 60 70 80 90 100 PERCENT OF RATED THERMAL POWER Page 14 of 23

n tO O

0 Vl M O M 20 t

z 2 o U) 08 g vn zo o~

<o n L-15 M 0 o+~o 0++ n n 3 Q HOW~pl

~x oQp 10 g Q n~'N~0m

~Q n-I

~~+XI I +~Z

~+

Q a Og I 5 o MK O m O 0 03 V

n Ol O

0 0

lg 25 50 75 100 PERCENT OF RATED THERMAI, POWER

0 e PVNGS UNlT 2 CYCLE 7 CORE OPERAT1NG LlM1TS REPORT Revision 0 FIGURE 3.2.4 2 DNBR MARGIN OPERATING LIMIT BASED ON THE CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, CEAC's OPERABLE) 2.5 ACCE TABLE CQ2>

Z (0. 95, 2.25) 0.1, 2.25)

R 2.2 0.1, 2.14) p 2.0 NACC PTABLE 1.9

-0.20 -0.15 -0.10 -0.05 0.00 0.05 0.10 0.15 0.20 CORE AVERAGE ASI Page 16 o( 23

Revision 0 PVNGS UNlT 2 CYCLE 7 CORE OPERATlNG LlMITS REPORT FIGURE 3.2.4' 3 DNBR MARGIN OPERATING LIMIT BASED ON THE CORE PROTECTION CALCULATORS-(COLSS OUT OF SERVICE, CEAC's INOPERABLE) 2.7 ACCE TABLE 2.6 CEAC's IN PERABLE (o.os 2 47~ o.1, 2.47

( 0.1, 234 NACC PTABLE 2.2 OPER TION 2.1

-0.20 -0.15 -0.10 -0.05 0.00 0.05 0.10 0.15 0.20 CORE AVERAGE ASI Page 17 o( 23

Revision 0 PVNGS UNIT 2 CYCLE,7 CORE OPERATING LIMITS REPORT LI T FTABL 3.1.2.7-1. Required Monitoring Frequencies for Backup Boron Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for K,g > 0.98.

3.j..2.7-2. Required Monitoring Frequencies for Backup Boron Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.98 > E,1I > 0.97.

3.j..2.7-3. Required Monitoring Frequencies for Backup Boron Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.97 > K,g > 0.96.

3.]..2.7-4. Required Monitoring Frequencies for Backup Boron Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.96 > E,ff) 0.95.

3.1.2.7-5. Required Monitoring Frequencies for Backup Boron Dilution Detection as

'a Function of Operating Charging Pumps and Plant Operational Modes for E,g < 0.95.

Page 13 of 23

Revision 0 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIiVlITSREPORT TABLE 3.1.2.7-1 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTIONDETECTION AS A FUNCTION OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR K,ff> 0.98 Number of Operating Charging Pumps OPERATIONAL MODE 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> ONA ONA 4 not on SCS 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> OiVA ONA 5 not on SCS 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> ONA ONA 4&5onSCS ONA ONA ONA ONA Notes: SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 19 of 93

Ke vision U PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT TABLE 3.1.2.7-2 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTIONDETECTION AS A FUNCTIOlil OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR 0.98 > off> 0.97 Number of Operating Charging Pumps OPERATIONAL MODE 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 0.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> ONA 4 not on SCS 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 2.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 0.5. hours 5 not on SCS 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 2.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 0.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 4 Bc 5 on SCS 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />'.5 hours ONA ONA Notes: SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 20 of 23

Revision 0 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITSREPORT TABLE 3.1.2.7-3 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTIONDETECTION AS ADJUNCTION OF OPERATIiNG CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR 0.97 > Kg ff) 0;96 Number of Operating Charging Pumps OPERATIONAL MODE 3

12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 3.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 1.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 0.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 4 not on SCS 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 3.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 1.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> -.1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 5 not on SCS 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 3.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 1.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 4 & 5 onSCS 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 0.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> ONA Notes: SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 21 of 23

Revi'sion 0 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIiVIITSREPORT TABLE 3.1.2.7-4 REQUIRED MONITORING FREQUENCIES FOR BACKUP BOROiN DILUTIONDETECTION AS A FUNCTION OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR 0.96 > K,ff> 0.95 Number of Operating Charging Pumps OPERATIOiNAL iMODE 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 4 not on SCS 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> " 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 5 not on SCS 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 1 ho'ur 4%5onSCS 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 0.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> ONA Notes: SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 22 of 23

Revision 0 PVNGS UNIT 2 CYCLE 7 CORE OPERATING LIMITS REPORT TABLE 3.1.2.7-5 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTIONDETECTION AS A FUNCTIOiN OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR K,g < 0.95 Number of Operating Charging Pumps OPERATIOiNAL MODE.

12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> 2.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 1.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 4 not on SCS 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> 1 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 5 not on SCS 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> 1.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 4& 5 onSCS 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 0.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 6 (> 4000 ppm) 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 8 hours 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 6 (< 4000 ppm) 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 0.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> ONA Notes: SCS = Shutdown Cooling System ONA = Operation not allowed Page 23 of 23

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