NL-08-1711, Cycle 24 Core Operating Limits Report - Version 2 and Unit 2 Cycle 20 Core Operating Limits Report - Version 2

Cycle 24 Core Operating Limits Report - Version 2 and Unit 2 Cycle 20 Core Operating Limits Report - Version 2

ML083190825
Person / Time
Site:	Hatch
Issue date:	11/14/2008
From:	Ajluni M Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-08-1711
Download: ML083190825 (59)

Text

Southern Nuclear Operating Company. Inc.

40 Inverness Center Parkway Post Office Box 1295 Birmingham, Alabama 35201-1295 Tel 205.992.5000 SOUTHERN COMPANY A.

November 14, 2008 Energy to Serve Your World'M Docket Nos.: 50-321 NL-08-1711 50-366 U. S. Nuclear Regulatory Commission ATrN: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant Unit 1 Cycle 24 Core Operating Limits Report - Version 2 Unit 2 Cycle 20 Core Operating Limits Report - Version 2 Ladies and Gentlemen:

In accordance with Units 1 and 2 Technical Specifications 5.6.5.d, Southern Nuclear Operating Company hereby submits the mid-cycle revisions to the Edwin I. Hatch Nuclear Plant Units 1 and 2 Core Operating Limits Reports (COLR).

This letter contains no NRC commitments. If there are any questions, please advise.

Sincerely,

~~~

M. J. Ajluni Manager, Nuclear Licensing MJAlPAH/daj

Enclosures:

1. HNP Core Operating Limits Report Unit 1 - Cycle 24, Version 2

2. HNP Core Operating Limits Report Unit 2 - Cycle 20, Version 2 cc: Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President Mr. D. R. Madison, Vice President - Hatch Mr. D. H. Jones, Vice President - Engineering RTYPE: CHA02.004 U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Mr. R. E. Martin, NRR Project Manager - Hatch Mr. J. A. Hickey, Senior Resident Inspector - Hatch

Edwin I. Hatch Nuclear Plant - Units 1 and 2 Enclosure 1 Unit 1 Cycle 24 Core Operating Limits Report - Version 2

Edwin I. Hatch Nuclear Plant Unit 1 Cycle 24 Core Operating Limits Report TABLE OF CONTENTS Section Title Page 1.0 Introduction 1 2.0 APLHGR Limits 2 3.0 MCPR Operating Limits 5 4.0 LHGR Limits 16 5.0 PBDA Amplitude Setpoints 22 6.0 References 23 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report TABLES 1-1 Equipment Out-of-Service Limitations 1 3-1 MCPR Operating Flexibility Options 7 4-1 LHGR Operating Flexibility Options 17 4-2 LHGR Limit versus Peak Pellet Exposure 17 5-1 OPRM Setpoint 22 ii Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report FIGURES Figure No. Title Page 2-1 Flow-Dependent APLHGR Multiplier 3 (MAPFAC F ) versus Core Flow 2-2 APLHGR Limit versus Average Planar 4 Exposure 3-1A Power-Dependent MCPR Limit (MCPRp) 8 versus Core Power from 24% to 28% of Rated Core Power (Turbine Bypass Valves Operable) 3-18 Power-Dependent MCPR Limit (MCPRp) 9 versus Core Power from 24% to 28% of Rated Core Power (Turbine Bypass Valves Inoperable) 3-2 Flow-Dependent MCPR Limit (MCPRF) 10 versus Core Flow 3-3A Power-Dependent MCPR Multiplier (Kp ) 11 versus Core Power (More than One Pressure Regulator Functional) 3-38 Power-Dependent MCPR Multiplier (K p ) 12 versus Core Power (EOG-RPT System Out of Service and Turbine Bypass Valves Inoperable Simultaneously, with More than One Pressure Regulator Functional) 3-3C Power-Dependent MGPR Multiplier (Kp ) 13 versus Core Power (Only One Pressure Regulator Functional) 3-4A MCPR Limits versus Average Scram Time 14 (BOG to EOR-1825 MWd/st) 3-48 MCPR Limits versus Average Scram Time 15 (EOR-1825 MWd/st to EOG) iii Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report Figure No. Title Page 4-1 Flow-Dependent LHGR Multiplier 18 (LHGRFAC F) versus Core Flow 4-2A Power-Dependent LHGR Multiplier 19 (LHGRFACp ) versus Core Power (More than One Pressure Regulator Functional) 4-28 Power-Dependent LHGR Multiplier 20 (LHGRFAC p ) versus Core Power (Only One Pressure Regulator Functional) 4-3 LHGR versus Peak Pellet Exposure 21 iv Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report

1.0 INTRODUCTION

The Core Operating Limits Report (COLR) for Plant Hatch Unit 1 Cycle 24 is prepared in accordance with the requirements of Technical Specification 5.6.5. The core operating limits presented herein were developed using NRC-approved methods (References 1 through 8). Results from the reload analyses for the fuel in Unit 1 Cycle 24 are documented in References 3 through 8.

The following core operating limits are included in this report:

a. Average Planar Linear Heat Generation Rate (APLHGR) - Technical Specification 3.2.1

b. Minimum Critical Power Ratio (MCPR) - Technical Specification 3.2.2

c. Linear Heat Generation Rate (LHGR) - Technical Specification 3.2.3 From a fuel thermal limits perspective, the following limitations are placed on Unit 1 operation.

Table 1-1 Equipment Out-of-Service Limitations Equipment I Condition Limitation EOC-RPT Out of Service and Turbine Bypass Valves Option B scram speeds must Inoperable Simultaneously be met (in place)

Only One Main Turbine Pressure Regulator Option B scram speeds must Functional be met (in place)

Single-Loop Operation (SLO)

• CTP s 2000 MWth

• Core Flow S 56% of Rated Also included in this report are the maximum allowable scram setpoint for the Period Based Detection Algorithm (PBDA) in the Oscillation Power Range Monitor (OPRM).

1 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report 2.0 APLHGR LIMITS (Technical Specification 3.2.1)

The APLHGR limit for each six inch axial segment of each fuel assembly in the core is the applicable APLHGR limit taken from Figure 2-2 multiplied by the flow-dependent multiplier, MAPFAC F* from Figure 2-1.

2 Version 2

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Operating Conditions F SLO I TLO MAPFAC F 30:s; F :s; 61 TLO 0.86 61 < F TLO 1.00 30:s; F SLO 0.80 F = Percent of Rated Core Flow FIGURE 2-1 Flow-Dependent APLHGR Multiplier (MAPFACFl versus Core Flow 3 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report 14.0 A\erage I I Planar APLHGR 13.0 ,

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FIGURE 2-2 APLHGR Limit versus Average Planar Exposure 4 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report 3.0 MCPR OPERATING I_IMITS (Technical Specification 3.2.2)

The MCPR operating limit (OLMCPR) is a function of core power, core flow, average scram time, number of operating recirculation loops, EOC-RPT system status, operability of the turbine bypass valves, and the number of pressure regulators that are functional.

With both recirculation pumps in operation (TLO), the OLMCPR is determined as follows:

a. For 24% ~ power < 28%, the power-dependent MCPR limit, MCPR p , as determined by Table 3-1.

b. For power ~ 28%, the OLMCPR is the greater of either:

1) The flow-dependent MCPR limit, MCPR F , from Figure 3-2, or

2) The product of the power-dependent multiplier, Kp , and the rated-power, rated flow OLMCPR, as determined by Table 3-1.

As shown on Figures 3-1A, 3-18,3-2, 3-4A and 3-48, the OLMCPR with only one recirculation pump in operation (SLO) is equal to the two loop (TLO) OLMCPR plus 0.02.

These limits apply to all modes of operation with feed water temperature reduction, as well as operation with normal feedwater temperatures.

=

In Figures 3-4A and 3-48, Option A scram time OLMCPRs correspond to t 1.0, where t is determined from scram time measurements performed in accordance with Technical Specifications Surveillance Requirements 3.1.4.1 and 3.1.4.2. Option 8 values correspond to t = 0.0. For scram times between Option A and Option 8, the rated power, rated-flow OLMCPR corresponds to t. If t has not been determined, Option A limits are to be used.

5 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report The average scram time of the control rods, "C, is defined as:

"Cave - "CB "C = 0, or , whichever is greater.

where: "CA = 1.08 sec (Technical Specification 3.1.4, Table 3.1.4-1, scram time limit to notch 36).

"CB = 11 + 1.65

• cr * [~] 1/2 LNi i=l where: 11 = 0.822 sec (mean scram time used in the transient analysis).

cr = 0.018 sec (standard deviation of 11).

n LNi'ti "Cave = i=1 n

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=1 where

n = number of surveillance tests performed to date in the cycle.

N, = number of active control rods measured in the ith surveillance test.

"Cj = average scram time to notch 36 of all rods in the ith surveillance test.

N1 = total number of active rods measured in Technical Specifications Surveillance Requirement 3.1.4.1.

6 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report TABLE 3-1 MCPR Operating Flexibility Options Rated Power/Rated Flow OLMCPRs BOC to EOR - 1825 Figure 3-4A EOR - 1825 to EOC Figure 3-4B MCPR p from 24% to 28% Power Turbine Bypass Valves Operable Figure 3-1A Turbine Bypass Valves Inoperable Figure 3-1 B Kp for Power ~ 28% of Rated More than one EOC-RPT System Pressure Turbine Bypass In Service Regulator Valves Operable Functional Yes Yes Yes Figure 3-3A No Yes Yes Figure 3-3A Yes No Yes Figure 3-3A No No Yes Figure 3-3B*

Yes/No Yes/No No Figure 3-3C*

EOR - End of rated conditions (100% power, 100% flow, ARO, with nominal feedwater temperature)

• Option B scram speeds must be met (in place) 7 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report 28 I

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MCPRp(TLO) = A + B*P MCPRp(SLO) = MCPRp(TLO) + 0.02 F A B F ~ 60 2.15 0.00 F > 60 3.340 -0.0300 P = Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 3-1A Power-Dependent MCPR Limit (MCPRp) versus Core Power from 24% to 28% of Rated Core Power (Turbine Bypass Valves Operable) 8 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report 2.2 ~-------_---------+-------~-"""""'---------I 24 25 26 27 28 Core Power (% of Rated)

MCPRp(TLO) = A + B*P MCPRp(SLO) = MCPRp(TLO) + 0.02 F A B F ~ 60 4.360 -0.0700 F > 60 6.588 -0.1167 P =Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 3-1B Power-Dependent MCPR Limit (MCPRp) versus Core Power from 24% to 28% of Rated Core Power (Turbine Bypass Valves Inoperable) 9 Version 2

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MCPRF(TLO) =Maximum [1.31, (A + B*F)]

MCPRF(SLO) =MCPRF(TLO) + 0.02 Operating Conditions Values of Variables Maximum Core Flow (% of Rated) A B 107,0 1.697 -0.00586 F = Percent of Rated Core Flow FIGURE 3-2 Flow-Dependent MCPR Limit (MCPR F) versus Core Flow 10 Version 2

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Kp =A + B*P P A B 28 < P < 45 1.7871 -0.00666 45 s P < 60 1.6702 -0.00867 60 s P 1.3750 -0.00375 P = Percent of Rated Core Power FIGURE 3-3A Power-Dependent MCPR Multiplier (K p ) versus Core Power (More than One Pressure Regulator Functional) 11 Version 2

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Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report 1.54 .. - - - - - - . . . , - - - - . . . , . - - - - - , - - - - - - , - - - - - - - , - - - . , - - - . . . - - - - - - , - - - - - - - - , - - - - - - - ,

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EOC*RPT Bypass Valves 't" = 0.0 't" = 1.0 In Service Operable 1.34 137 Out of Service Operable 1.38 1.49 In Service Inoperable 1.38 1.41 Out of Service Inoperable 1.41 1.52 OLMCPR(SLO) = OLMCPR(TLO) + 0.02 FIGURE 3-4A MCPR Limits versus Average Scram Time (BOC to EOR-1825 MWd/st) 14 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report 164 -r---....,.....-----,------,-----r-----,------..,.------rj-------,---.,...------.

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EOC-RPT Bypass Valves 't = 0.0 't = 1.0 In Service Operable 1.38 1.41 Out of Service Operable 1.42 1.59 In Service Inoperable 1.41 1.44 Out of Service Inoperable 1.46 1,63 OLMCPR(SLO) =OLMCPR(TLO) + 0.02 FIGURE 3-4B I\IICPR Limits versus Average Scram Time (EOR-1825 MWdlst to EOC) 15 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report 4.0 LHGR LIMITS (Technical Specification 3.2.3)

The LHGR Iirnit for each six inch axial segment of each fuel rod in the core is the applicable rated-power, rated-flow LHGR limit taken from Table 4-2 multiplied by the smaller of either:

a. The flow-dependent multiplier, LHGRFAC F, from Figure 4-1, or

b. The power-dependent multiplier, LHGRFAC p , as determined by Table 4-1.

Table 4-2 shows the exposure-dependent LHGR limits for all fuel types in the core, including the U02 rods which contain no gadolinium. The LHGR limit is based on initial Gd content in a six inch segment of a fuel rod and the maximum initial Gd content anywhere in the same rod. The first column in Table 4-2 shows the segment Gd concentration and the second column shows the maximum Gd concentration for each fuel type. For exposures between the values shown in Table 4-2, the LHGR limit is based on linear interpolation. For illustration purposes, Figure 4-3 shows the LHGR limits for U0 2 rods and for the most limiting (7.0 w/o) Gd rods in the core.

16 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report Table 4-1 LHGR Operating Flexibility Options More than One Pressure Regulator Functional LHGRFAC p Yes Figure 4-2A No Figure 4-28 Table 4-2 LHGR limit versus Peak Pellet Exposure LHGR LHGR LHGR LHGR Six Inch Rod limit at limit at Exp. at limit at Exp. at limit at Exp. at Segment Maximum SOL Knee 1 Knee 1 Knee 2 Knee 2 EOL EOL Gd (w/o) Gd (w/o) (kW/ft) (kW/ft) (GWd/st) (kW/ft) (GWd/st) (kW/ft) (GWd/st) 0.00 0.00 13.400 13.400 14.515 8.000 57.607 5.000 63.504 2.00 2.00 13.093 13.093 12.449 7.816 55.681 4.885 61.597 5.00 5.00 12.521 12.521 12.389 7.475 55.443 4.672 61.335 6.00 6.00 12.255 12.255 12.276 7.316 54.999 4.572 60.845 0.00 7.00 13.200 13.200 14.298 7.881 56.747 4.925 62.556 2.00 7.00 13.093 13.093 12.449 7.816 55.681 4.885 61.597 5.00 7.00 12.300 12.300 12.132 7.343 54.424 4.590 60.212 6.00 7.00 12.100 12.100 12.095 7.224 54.275 4.515 60.047 7.00 7.00 12.000 12.000 12.174 7.164 54.589 4.478 60.394 17 Version 2

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LHGRFAC F =Minimum [1.0, (A + B*F)]

Maximum Core Flow (% of Rated) A B 107.0 0.4574 0.006758 F =Percent of Rated Core Flow FIGURE 4-1 Flow-Dependent LHGR Multiplier (LHGRFAC F) versus Core Flow 18 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report 11 I

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LHGRFAC p = A + B*P Operatinc Conditions Values of Variables P F SLO/TLO A B 24:5 P < 28 F > 60 SLO I TLO 0.17924 0.00967 24:5 P < 28 F:5 60 SLO I TLO 0.41897 0.00510 28:5 P < 45 All SLO I TLO 0.41897 0.00510 45<P<61.72 All SLO I TLO 0.4776 0.005224 61.72:5P All TLO 0.4776 0.005224 61.72:5P All SLO 0.800 0.000 P = Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 4-2A Power-Dependent LHGR Multiplier (LHGRFAC p ) versus Core Power (More than One Pressure Regulator Functional) 19 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report 11 I I u

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LHGRFAC p =A + B*P Operatin~ Conditions Values of Variables P F A B 24::; P < 28 F > 60 0.17924 0.00967 24::; P < 28 F::; 60 0.41897 0.0051 28::; P < 70 All 0.41897 0.0051 70::; P All 0.25253 0.00747 P = Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 4-2B Power-Dependent LHGR Multiplier (LHGRFAC p ) versus Core Power (Only One Pressure Regulator Functional) 20 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report 14.00 r------r-----;-----:'--,.--.---,---;---,----r--,--.--.

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0.00 500 10.00 15 00 20.00 25.00 30.00 35.00 40.00 45.00 50.00 55.00 60.00 65.00 Peak Pellet Exposure (GWd/st)

FIGURE 4-3 LHGR versus Peak Pellet Exposure 21 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report 5.0 PBDA AMPLITUDE SETPOINTS The amplitude trip setpoint in the Period Based Detection Algorithm in the OPRM system shall not exceed the values reported in the Table below. This applies to instruments 1C51K615 A, B, C, and D.

Table 5-1 OPRM Setpoint OLMCPR OPRM Set

~ 1.31 1.15 22 Version 2

Plant Hatch Unit 1 Cycle 24 Core Operating Limits Report

6.0 REFERENCES

1. "General Electric Standard Application for Reactor Fuel," NEDE-24011-P-A-15, September 2005, and the US Supplement, NEDE-24011-P-A-15-US, September 2005.

2. GNF letter MJM-SNC-HT1-07-098-Rev1, "Hatch 1 Cycle 24 SRLR and FBIR," M.

Mneimneh to R. Cocherell, December 8,2007.

3. Global Nuclear Fuel document 0000-0067-2863-SRLR, "Supplemental Reload Licensing Report for Edwin I. Hatch Nuclear Power Plant Unit 1, Reload 23 Cycle 24," Revision 0, December 2007.

4. Global Nuclear Fuel document 0000-0067-2863-FBIR, "Fuel Bundle Information Report for Edwin I. Hatch Nuclear Power Plant Unit 1, Reload 23 Cycle 24,"

Revision 0, December 2007.

5. SNC Nuclear Fuel Document NF-07-125, "Hatch-1 Cycle 24 Reload Licensing Analysis Report," Version 1, February 2008.

6. GNF Letter, "Plant Hatch Technical Specification Modification to include LHGR," M.

E. Harding (GNF) to E. B. Gibson, January 22, 2004.

7. GNF Letter RA-SNC-06-015, Rev. 2, "GE14 LHGR Curves," R. Augi to W. Mertz, February 13, 2006.

8. SNC Memo CAH-NF-2668, "Generic RPTOOS + BPVOOS ARTS Analysis," W. R.

Mertz to K. S. Folk, October 16, 2008.

23 Version 2

Edwin I. Hatch Nuclear Plant - Units 1 and 2 Enclosure 2 Unit 2 Cycle 20 Core Operating Limits Report - Version 2

Edwin I. Hatch Nuclear Plant Unit 2 Cycle 20 Core Operating Limits Report TABLE OF CONTENTS Section Title Page 1.0 Introduction 1 2.0 APLHGR Limits 2 3.0 MCPR Operating Limits 5 4.0 LHGR Limits 17 5.0 PBDA Amplitude Setpoints 24 6.0 References 25 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report TABLES Table No.

1-1 Equipment Out-of-Service Limitations 1 3-1 MCPR Operating Flexibility Options 7 4-1 LHGR Operating Flexibility Options 18 4-2 LHGR Limits versus Peak Pellet Exposure 18 5-1 OPRM Setpoint 24 ii Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report FIGURES Figure No. Title Page 2-1 Flow-Dependent APLHGR Multiplier 3 (MAPFAC F) versus Core Flow 2-2 APLHGR Limit versus Average Planar 4 Exposure 3-1A Power-Dependent MCPR Limit (MCPRp ) 8 versus Core Power from 24% to 28% of Rated Core Power (Turbine Bypass Valves Operable) 3-18 Power-Dependent MCPR Limit (MCPR p ) 9 versus Core Power from 24% to 28% of Rated Core Power (Turbine Bypass Valves Inoperable) 3-2 Flow-Dependent MCPR Limit (MCPR F) 10 versus Core Flow 3-3A Power-Dependent MCPR Multiplier (K p ) 11 versus Core Power (More than One Pressure Regulator Functional) 3-38 Power-Dependent MCPR Multiplier (K p ) 12 versus Core Power (EOC-RPT System Out of Service and Turbine Bypass Valves Inoperable Simultaneously, with More than One Pressure Regulator Functional) 3-3C Power-Dependent MCPR Multiplier (K p ) 13 versus Core Power (Only One Pressure Regulator Functional) 3-4A MCPR Limits versus Average Scram Time 14 (BOC to EOR-4700 MWd/st) 3-48 MCPR Limits versus Average Scram Time 15 (EOR-4700 MWd/st to EOR-2200 MWd/st) iii Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 3-4C MCPR Limits versus Average Scram Time 16 (EOR-2200 MWd/st to EOG) 4-1 Flow-Dependent LHGR Multiplier 19 (LHGRFAC F) versus Core Flow 4-2A Power-Dependent LHGR Multiplier 20 (LHGRFAC p) versus Core Power (More than One Pressure Regulator Functional and High Pressure Heaters In Service) 4-28 Power-Dependent LHGR Multiplier 21 (LHGRFAC p ) versus Core Power (Only One Pressure Regulator Functional and High Pressure Heaters In Service) 4-2C Power-Dependent LHGR Multiplier 22 (LHGRFAC p ) versus Core Power (More than One Pressure Regulator Functional and High Pressure Heaters Out of Service) 4-3 LHGR versus Peak Pellet Exposure 23 iv Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report

1.0 INTRODUCTION

The Core Operating Limits Report (COLR) for Plant Hatch Unit 2 Cycle 20 is prepared in accordance with the requirements of Technical Specification 5.6.5. The core operating limits presented herein were developed using NRC-approved methods (References 1, 3, 4, 5 and 8). Results from the reload analyses for the fuel in Unit 2 Cycle 20 are documented in References 3, 4, 5, 6 and 8.

The following core operating limits are included in this report:

a. Average Planar Linear Heat Generation Rate (APLHGR) - Technical Specification 3.2.1

b. Minimum Critical Power Ratio (MCPR) - Technical Specification 3.2.2

c. Linear Heat Generation Rate (LHGR) - Technical Specification 3.2.3 From a fuel thermal limits perspective, the following limitations are placed on Unit 2 operation.

Table 1-1 Equipment Out-of-Service Limitations Equipment I Condition Limitation EOC-RPT Out of Service and Turbine Bypass Option B scram speeds must be Valves inoperable simultaneously met (in place)

Option B scram speeds must be Only One Pressure Regulator Functional met (in place)

Single-Loop Operation (SLO)

• CTP ~ 2000 MWt

• Core Flow ~ 56% of Rated High Pressure Feedwater Heater(s) Out of Service No Core Operating Limits and Only One Pressure Regulator Functional (enter TS RAS 3.2.2 and 3.2.3) simuItaneously Also included in this report is the maximum allowable scram setpoint for the Period Based Detection Algorithm (PBDA) in the Oscillation Power Range Monitor (OPRM).

1 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 2.0 APLHGR LIMITS (Technical Specification 3.2.1)

The APLHGR limit for each six inch axial segment of each fuel assembly in the core is the applicable APLHGR limit taken from Figure 2-2, multiplied by the flow-dependent multiplier, MAPFAC F, from Figure 2-1.

2 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report (J

01(

u.

a.

to 0.9

-t-TLO 1--+-----+-1----+----+-----+------+---------1 01(

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0.4 61 30 40 50 60 70 80 90 1)0 11)

Core Flow (% of Rated)

Operatin<<: Conditions Flow SLO I TLO MAPFAC F 30 ~ F ~ 61 TLO 0.86 61 < F TLO 1.00 30~ F SLO 0.80 F = Percent of Rated Core Flow FIGURE 2-1 Flow-Dependent APLHGR Multiplier (MAPFAC F) versus Core Flow 3 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 14.0 A\erage Planar APLHGR Exposure 0.00 14.51 19.13 Limit 12.82 12.82 12.82 n.o

'!Z.O 1tO " "~

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0.0 5.0 n.o 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 Average Planar Exposure (GWd/st)

FIGURE 2-2 APLHGR Limit versus Average Planar Exposure 4 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 3.0 MCPR OPERATING LIMITS (Technical Specification 3.2.2)

The MCPR operating limit (OLMCPR) is a function of core power, core flow, average scram time, number of operating recirculation loops, EOC-RPT system status, operability of the turbine bypass valves, and the number of pressure regulators that are functional.

With both recirculation pumps in operation (TLO), the OLMCPR is determined as follows:

a. For 24% ::; power < 28%, the power-dependent MCPR limit, MCPR p , as determined by Table 3-1.

b. For power ~ 28%, the OLMCPR is the greater of either:

1) The flow-dependent MCPR limit, MCPR F , from Figure 3-2, or

2) The product of the power-dependent multiplier, Kp , and the rated-power, rated flow OLMCPR, as determined by Table 3-1.

With only one recirculation pump in operation (SLO), the OLMCPRs in Figures 3-1A, 3 1B, 3-2, 3-4A, 3-4B, and 3-4C must be increased by 0.02.

These limits apply to operation with intermittent feedwater temperature reduction, as well as operation with normal feedwater temperatures.

In Figures 3-4A, 3-4B, and 3-4C, Option A scram time OLMCPRs correspond to 't = 1.0, where 't is determined from scram time measurements performed in accordance with Technical Specifications Surveillance Requirements 3.1.4.1 and 3.1.4.2. Option B values correspond to 't = 0.0. For scram times between Option A and Option B, the rated-power, rated-flow OLMCPR corresponds to 'to If't has not been determined, Option A limits are to be used.

5 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report The average scram time of the control rods, 't, is defined as:

'tave - 'tB

't = 0, or , whichever is greater.

where: 'tA = 1.08 sec (Technical Specification 3.1.4, Table 3.1.4-1, scram time limit to notch 36).

1/2 Nt

= Il + 1.65

• cr

• n INi

=1 where

Il = 0.822 sec (mean scram time used in the transient analysis).

cr = 0.018 sec (standard deviation of Il).

n I Ni!,

't ave = i=1 n

INi i=t where: n = number of surveillance tests performed to date in the cycle.

N; = number of active control rods measured in the ith surveillance test.

'tj = average scram time to notch 36 of all rods in the ith surveillance test.

N1 = total number of active rods measured in Technical Specifications Surveillance Requirement 3.1.4.1.

6 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report Table 3-1 MCPR Operating Flexibility Options Rated Power/Rated Flow OLMCPRs BOC to EOR - 4700 Figure 3-4A EOR - 4700 to EOR 2200 Figure 3-4B EOR - 2200 to EOC Figure 3-4C MCPR p from 24% to 28% Power Turbine Bypass Valves Operable Figure 3-1A Turbine Bypass Valves Inoperable Figure 3-1 B Kp for Power ~ 28% of Rated More than one EOC-RPT System Pressure Turbine Bypass In Service Regulator Valves Operable Functional Yes Yes Yes Figure 3-3A No Yes Yes Figure 3-3A Yes No Yes Figure 3-3A No No Yes Figure 3-3B*

Yes/No Yes/No No Figure 3-3C*

EOR = End of rated conditions (100% power, 100% flow, ARO, with nominal feedwater temperature)

• Option B scram speeds must be met (in place) 7 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 2.8 II:: 2.6 Q.

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+-~ ---------i Q.

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I 2.0 i 24 25 26 27 28 Core Power (% of Rated)

MCPRp(TLO) = A + B*P MCPRp(SLO) = MCPRp(TLO) + 0.02 F A B F:o;60 2.17 0.00 F> 60 3.360 -0.0300 P = Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 3-1A Power-Dependent MCPR Limit (MCPRp) versus Core Power from 24% to 28% of Rated Core Power (Turbine Bypass Valves Operable) 8 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 4.0 ....---------""""1--------,....--------..,....---------...,

3.8 f"'-

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---

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2.4 2.2 i I 24 25 26 27 28 Core Power (% of Rated)

MCPRp(TLO) = A + B*P

=

MCPRp(SLO) MCPRp(TLO) + 0.02 F A B F ~ 60 4.400 -0.0707 F > 60 6.648 -0.1178 P = Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 3-1 B Power-Dependent MCPR Limit (MCPRp) versus Core Power from 24% to 28% of Rated Core Power (Turbine Bypass Valves Inoperable) 9 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 16

-;;: 15 ll::

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I Maximum Flow 107% i I

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30 40 50 60 70 80 90 no ttl Core Flow (% of Rated)

MCPRF(TLO) =Maximum [1.31, (A + B*F)]

MCPRF(SLO) =MCPRF(TLO) + 0.02 Maximum Core Flow (% of A B Rated) 107.0 1.713 -0.00591 F = Percent of Rated Core Flow FIGURE 3-2 Flow-Dependent MCPR Limit (MCPRF) versus Core Flow 10 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 1.8 ,

I I i i 1.7 i I i

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Kp = A + B*P P A B 28:::; P < 48 1.8044 -0.00659 48 < P < 60 1.6702 -0.00867 60:::; P 1.3750 -0.00375 P - Percent of Rated Core Power FIGURE 3-3A Power-Dependent MCPR Multiplier (Kp) versus Core Power (More than One Pressure Regulator Functional) 11 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 1.8 I

1.7 ----_ .. ._--,~,_. - ----- - ._.'------- --4 I I I

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1.1 I I 1.0 U ~ ~ ~ << ~ ~ ~ M ~ M n ro M M M n  % 100 Core Power (% of Rated)

Kp =A + 8*P P A 8 28 ~ P < 48 1.8044 -0.00659 48 < P < 90 1.5005 -0.00490 90~ P 1.5961 -0.00596 P = Percent of Rated Core Power FIGURE 3-38 Power-Dependent MCPR Multiplier (K p) versus Core Power (EOC-RPT System Out of service and Turbine Bypass Valves Inoperable Simultaneously, with More than One Pressure Regulator Functional) 12 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 1.8 I I i

17

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M M ~

00 W K p = A + B*P P A B 28 < P < 70 1.8044 -0.00659 70 ~ P 2.1439 -0.01144 P - Percent of Rated Core Power FIGURE 3-3C Power-Dependent MCPR Multiplier (Kp ) versus Core Power (Only One Pressure Regulator Functional) 13 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 1.54 ,----,----.,....----,------r---,-----r---r---;----..,--------,

I 1.52 +---+---+--~--~-- -r-EOC--RPT-'---~U-U:-O-f s....Je-rV-lce-'-r-- . . -_ _

150 + - - - - + - - - _ + _ - - - + - - 1 BPV Inoperable ----lo-...--=-----+-----j-~--~

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.t! ~~ ....... _ _ I EOC-RPTOutofSerVlcel

~ 1.44 ~ ~~ --+-------1 (J 1.42 t"""""--+-----t~--=o--=if------+----- ----- 1- .- --------+-~~---I--- ~--_____i-------

~ 140 ----~~------ ---- --------~----f----------r-'--- .........---,---+---_+_----

......-- I BPV Inoperable I 138 ---_. -- _.

138 134 132 +----+----+----+-----I-----+----I---+----+----I---~

I EOC-RPT In Service and BPV Operable 0.0 0.1 02 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10 Tau Operatin~ Conditions OLMCPR(TLO)

EOC*RPT Bypass Valves 't =0.0 't = 1.0 In Service Operable 1.33 1.36 Out of Service Operable 1.39 1.50 In Service Inoperable 1.36 1.39 Out of Service Inoperable 1.42 1.53 OLMCPR(SLO) = OLMCPR(TLO) + 0.02 FIGURE 3-4A MCPR Limits versus Average Scram Time (SOC to EOR*4700 MWd/st) 14 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 156 154 --'- ..... _-- ---- f------ I ~

~

152 EOC-RPT Out of Service ~

~

Plus 150 ._-_._. -_ _ - - -

BPV Inoperable

.-'" ~ ~

148 I

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144 _._--- ----- --_ ... __ . ---_.. --t---------l-I 142 ~ BPV Inoperable I

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140 I 138 I I I EDC-RPT In service and BPV Operable r-136 I I 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10 Tau Ooeratim Conditions OLMCPR(TLO)

EOC-RPT Bypass Valves t = 0.0 t = 1.0 In Service Ooerable 1.37 1.40 Out of Service Operable 1.41 1.52 In Service Inoperable 1.39 1.42 Out of Service Inoperable 1.44 1.55 OLMCPR(SLO) =OLMCPR(TLO) + 0.02 FIGURE 3-4B MCPR Limits versus Average Scram Time (EOR-4700 MWdlst to EOR-2200 MWdlst) 15 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 1.66 1.64 I V 1.62 t-~- .....

~

B)C*RPT Out of service

~ ~

1.60 1.58 1.56

.."., ~

Plus BPV Inoperable

.... ~

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i 1.52

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1.46 ........ V- I BPV Inoperable I

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1.44 1.42 1.40 B)C*RPT In service and BPV Operable ~

1.38 0.0 0.1 0,2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Tau Operatin~ Conditions OLMCPRCTLO)

EOC-RPT Bypass Valves 't = 0.0 't = 1.0 In Service Operable 1.40 1.43 Out of Service Operable 1.45 1.62 In Service Inoperable 1.43 1.46 Out of Service Inoperable 1.48 1.65 OLMCPR(SLO) =OLMCPR(TLO) + 0.02 FIGURE 3-4C MCPR Limits versus Average Scram Time (EOR-2200 MWd/st to EOC) 16 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 4.0 LHGR LIMITS (Technical Specification 3.2.3)

The LHGR limit for each six inch axial segment of each fuel rod in the core is the applicable rated-power, rated-flow LHGR limit taken from Table 4-2 multiplied by the smaller of either:

a. The flow-dependent multiplier, LHGRFAC F , from Figure 4-1, or

b. The power-dependent multiplier, LHGRFAC p , as determined by Table 4-1.

Table 4-2 shows the exposure-dependent LHGR limits for all fuel types in the core, including the U02 rods which contain no gadolinium. The LHGR limit is based on initial Gd content in a six inch segment of a fuel rod and the maximum initial Gd content anywhere in the same rod. The first column in Table 4-2 shows the segment Gd concentration and the second column shows the maximum Gd concentration for each fuel type. For exposures between the values shown in Table 4-2, the LHGR limit is based on linear interpolation. For illustration purposes, Figure 4-3 shows the LHGR limits for U02 rods and for the most limiting (7.0 w%) Gd rods in the core.

17 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report Table 4-1 lHGR Operating Flexibility Options More than One High Pressure Pressure Regulator Feedwater Functional Heaters lHGRFAC p Yes In Service Figure 4-2A No In Service Figure 4-2B Yes Out of Service Figure 4-2C Table 4-2 lHGR Limits versus Peak Pellet Exposure lHGR lHGR lHGR lHGR Six Inch Rod limit at limit at Exp. At limit at Exp. At limit at Exp. At Segment Maximum BOl Knee 1 Knee 1 Knee 2 Knee 2 EOl EOl Gd (w%) Gd (w%) (kW/ft) (kW/ft) (GWd/st) (kW/ft) (GWd/st) (kW/ft) (GWd/st) 0.00 0.00 13.400 13.400 14.515 8.000 57.607 5.000 63.504 0.00 2.00 12.800 12.800 13.866 7.642 55.028 4.776 60.660 2.00 2.00 13.093 13.093 12.449 7.816 55.681 4.885 61.597 0.00 5.00 13.100 13.100 14.190 7.821 56.317 4.888 62.082 5.00 5.00 12.521 12.521 12.389 7.475 55.443 4.672 61.335 0.00 6.00 13.100 13.100 14.190 7.821 56.317 4.888 62.082 6.00 6.00 12.255 12.255 12.276 7.316 54.999 4.572 60.845 0.00 7.00 13.200 13.200 14.298 7.881 56.747 4.925 62.556 2.00 7.00 13.093 13.093 12.449 7.816 55.681 4.885 61.597 5.00 7.00 12.300 12.300 12.132 7.343 54.424 4.590 60.212 6.00 7.00 12.100 12.100 12.095 7.224 54.275 4.515 60.047 7.00 7.00 12.000 12.000 12.174 7.164 54.589 4.478 60.394 BOl = Beginning of life (zero exposure)

EOl =End of Life (maximum licensed pellet exposure) 18 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report to +-----t------+----+---+---~---_+_---_+_---_f

~

~

[/~~I __~ .JI'" MAX FLOW = f------+------1

~

=~

0.9

/1-0'" I 107%

r 3 V".-------

c 07

/V --+----- --- -----+--------t--------- ~.--- ..--.---

CD

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Q.

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0.4 -I----+-----l-----I-----+-----I-----+-----+----~

I 30 40 50 60 70 80 90 tlO ttl Core Flow (% of Rated)

LHGRFAC F = Minimum [1.0, (A + B*F)]

Maximum Core Flow (% of Rated) A B 107.0 0.4574 0.006758 F = Percent of Rated Core Flow FIGURE 4-1 Flow-Dependent LHGR Multiplier (LHGRFAC F) versus Core Flow 19 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 1.1 I

I I

0 1.0 - r- ~_. __ .. _. --

V

~

.:(

II.

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I TLO I V C)

J: 0.9

....... .-... V

=.... " :>-- ",..,... ",..,...

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l r ,.,... ~

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C)

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,.,...... --' I'

- I Ql C- 0.6 ---_.. ---~-

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0 a.. 0.5

..A > 60% Core Row ~ ... .

/

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U U ~ ~ ~ M a ~ ~ ~ ~ ~ n ffl M M M ~ 00 m Core Power (% of Rated)

LHGRFAC p =A + B*P Operatinl Conditions Values of Variables P F SLO/TLO A B 24:::; P < 28 F> 60 SLO/TLO 0.17924 0.00967 24:::; P < 28 F S60 SLO/TLO 0.41897 0.00510 28 < P < 48 All SLO /TLO 0.41897 0.00510 48:::;P< 61.72 All SLO/TLO 0.4776 0.005224 61.72:::; P All TLO 0.4776 0.005224 61.72:::; P All SLO 0.800 0.000 P = Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 4-2A Power-Dependent LHGR Multiplier (LHGRFAC p) versus Core Power (More than One Pressure Regulator Functional and High Pressure Heaters In Service) 20 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report t1 i I I II I II

. i I to --- I

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a:

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~ ~ ~ ~ ~ << ~ ~ ~ ~ ~ ~ n ffl ~ M M ~ 00 U Core Power ('¥oof Rated)

LHGRFAC p = A + B*P ODeratina Conditions Values of Variables P F SLO/TLO A B 24 < P < 28 F > 60 SLO/TLO 0.17924 0.00967 24 < P < 28 FS60 SLO ITLO 0.41897 0.00510 28 =:; P < 70 All SLO ITLO 0.41897 0.00510 70 =:; P All SLO ITLO 0.25253 0.00747 P = Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 4-2B Power-Dependent LHGR Multiplier (LHGRFAC p) versus Core Power (Only One Pressure Regulator Functional and High Pressure Heaters In Service) 21 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report t1 I

to V

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~....-

~

C

.:.lD J

0 "J ~ > 60% Core Flow I II.. 0.5 - ._ - --

0.4 j

M ~ ~ * ~ << ~ ~ ~ M M ~ n re M M M ~ 00 00 Core Power (% of Rated)

LHGRFAC p = A + B*P Operating Conditions Values of Variables P F SLOfTLO A B 24:$: P < 28 F> 60 SLO/TLO 0.17924 0.00967 24:$: P < 28 F s 60 SLO/TLO 0.41897 0.00510 28:$: P < 48 All SLO/TLO 0.41897 0.00510 48:$: P < 60.04 All SLO/TLO 0.4776 0.005224 60.04 :$: P < 86.06 All SLO/TLO 0.791 0.000 86.06:$: P All TLO -0.498 0.01498 P = Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 4-2C Power-Dependent LHGR Multiplier (LHGRFAC p ) versus Core Power (More than One Pressure Regulator Functional and High Pressure Heaters Out of Service) 22 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 14.00 13.00 U02 Rods Peak '",

Pellet Exposure 0.00 14.51 LHGR 13.40 13.40 12.00 11.00 -

'~

I"

-"","~-+--+---+---+-

~~+---+r-----'--"l-

~II 002 Rods

--j---+---+-_...

-+----+----1

--, ,,- -+~-+-~t-I'-..._",,~-+~-+r-...~-f--- -- -f----+--+-~I I=

57.61 8.00 10.00 --,_.

63.50 5.00 a: 9.00 I 01'-.. '~

IG::d....:..R=O;:.:~S:..J~"'~ ~-+-r--...~-+-_.

C)

J:

...J 8.00 --

--i-i--r--i"L,:

Limiting Gd Rods

'~

Peak Pellet 7.00 '-'--.

'---" --+----+--1-+--:- r-- ~-

I

~- r\\\

Exposure 0.00 12.17 54.59 60.39 LHGR 12.00 12.00 7.16 4.48 8.00 500 400 e----

I l~~I 1

'----- . \\

000 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00 45.00 50.00 55.00 60.00 65.00 Peak Pellet Exposure (GWd/st)

FIGURE 4-3 LHGR versus Peak Pellet Exposure 23 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report 5.0 PBDA AMPLITUDE SETPOINTS The amplitude trip setpoint in the Period Based Detection Algorithm in the OPRM system shall not exceed the values reported in the Table below. This applies to instruments 2C51K615 A, B, C, and D.

Table 5-1 OPRM Setpoint OLMCPR OPRM Setpoint

~ 1.33 1.15 24 Version 2

Plant Hatch Unit 2 Cycle 20 Core Operating Limits Report

6.0 REFERENCES

1. "General Electric Standard Application for Reactor Fuel," NEDE-24011-P-A-15, September 2005, and the US Supplement, NEDE-24011-P-A-15-US, September 2005.

2. GNF Letter "Plant Hatch Technical Specification Modification to include LHGR," M.

E. Harding (GNF) to E. B. Gibson, January 22, 2004.

3. Global Nuclear Fuel document 0000-0045-1586-SRLR, "Supplemental Reload Licensing Report for Edwin I. Hatch Nuclear Power Plant Unit 2, Reload 19 Cycle 20," Revision 0, December 2006.

4. Global Nuclear Fuel document 0000-0030-0566-SRLR, "Supplemental Reload Licensing Report for Edwin I. Hatch Nuclear Power Plant Unit 2, Reload 18 Cycle 19," Revision 1, February 2005.

5. SNC Letter CAH-NF-2599, "H2C20 SNC Reload Licensing Analyses," W. R. Mertz to K. S. Folk, January 16,2007.

6. Global Nuclear Fuel document 0000-0045-1586-FBIR, "Fuel Bundle Information Report for Edwin I. Hatch Nuclear Power Plant Unit 2, Reload 19 Cycle 20,"

Revision 0, December 2006.

7. GNF Design Basis Document DB-0012.03, "Fuel-Rod Thermal-Mechanical Performance Limits for GE14C," Revision 2, September 2006.

8. SNC Letter CAH-NF-2668, "Generic RPTOOS + BPVOOS ARTS Analysis," W. R.

Mertz to K. S. Folk, October 16, 2008.

25 Version 2