NL-12-0673, E. I. Hatch Nuclear Plant- Unit 1, Cycle 26 Core Operating Limits Report, Version 1

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E. I. Hatch Nuclear Plant- Unit 1, Cycle 26 Core Operating Limits Report, Version 1
ML12093A077
Person / Time
Site: Hatch Southern Nuclear icon.png
Issue date: 03/30/2012
From: Ajluni M
Southern Nuclear Operating Co
To:
Office of Nuclear Reactor Regulation, Document Control Desk
References
NL-12-0673
Download: ML12093A077 (31)
v • d • e


Text

Mark J. Ajluni, P.E. Southern Nuclear Nuclear Licensing Director Operating Company, Inc.

40 Inverness Center Parkway Post Office Box 1295 Birmingham, Alabama 35201 Tel 205.992.7673 Fax 205.992.7885 March 30, 2012 SOUTHERN'\'

COMPANY Docket Nos.: 50-321 U. S. Nuclear Regulatory Commission t\I L-12-0673 ATTN: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant - Unit 1 Cycle 26 Core Operating Limits Report. Version 1 Ladies and Gentlemen :

In accordance with Technical Specification 5.6.5.d., Southern Nuclear Operating Company (SNC) submits the enclosed Core Operating Limits Report (COLR) for Edwin I. Hatch Nuclear Plant Unit 1 Cycle 26 Version 1.

This letter contains no NRC commitments. If you have any questions, please contact Jack Stringfellow at (205) 992-7037.

Respectfully submitted ,

~~ef--

M. J. Ajluni Nuclear Licensing Director MJAlRMJ/lac

Enclosure:

HNP Unit 1 Cycle 26 Version 1 Core Operating Limits Report cc: Southern Nuclear Operating Company Mr. S. E. Kuczynski , Chairman, President & CEO Mr. D. G . Bost, Executive Vice President & Chief Nuclear Officer Mr. D. R. Madison, Vice President - Hatch Mr. B. L. Ivey, Vice President - Regulatory Affairs Mr. B. J. Adams, Vice President - Fleet Operations RTYPE: CHA02 .004 U. S. Nuclear Regulatory Commission Mr. V. M. McCree , Regional Administrator Mr. P. G. Boyle, NRR Senior Project Manager - Hatch Mr. E. D. Morris, Senior Resident Inspector - Hatch

Edwin I. Hatch Nuclear Plant - Unit 1 Cycle 26 Core Operating Limits Report, Version 1 Enclosure HNP Unit 1 Cycle 26 Version 1 Core Operating Limits Report

Edwin I. Hatch Nuclear Plant Unit 1 Cycle 26 Core Operating Limits Report TABLE OF CONTENTS Section Title Page 1.0 Introduction 1 2.0 APLHGR Limits 3 3.0 MCPR Operating Limits 6 4.0 LHGR Limits 18 5.0 PBDA Amplitude Setpoint 24 6.0 References 25 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report TABLES Table No.

1-1 Main Turbine Bypass System Operability 1 1-2 Equipment-Out-of-Service Limitations 2 3-1 MCPR Operating Flexibility Options 8 4-1 LHGR Operating Flexibility Options 19 4-2 LHGR Limit versus Peak Pellet Exposure 19 5-1 OPRM Setpoint 24 ii Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report FIGURES Figure No. Title Page 2-1 Flow-Dependent APLHGR Multiplier 4 (MAPFAC F) versus Core Flow 2-2 APLHGR Limit versus Average Planar 5 Exposure 3-1A Power-Dependent MCPR Limit (MCPR p) 9 versus Core Power from 24% to 45% of Rated Core Power 3-18 Power-Dependent MCPR Limit (MCPR p) 10 versus Core Power from 24% to 45% of Rated Core Power (Main Turbine Bypass System Inoperable) 3-2 Flow-Dependent MCPR Limit (MCPR F) 11 versus Core Flow 3-3A Power-Dependent MCPR Multiplier (Kp) 12 versus Core Power 3-38 Power-Dependent MCPR Multiplier (Kp) 13 versus Core Power (EOC-RPT System Out of Service and Main Turbine Bypass System Inoperable Simultaneously) 3-3C Power-Dependent MCPR Multiplier (Kp) 14 versus Core Power (Main Turbine Pressure Regulator System in nco 3.3. 13.c) 3-4A MCPR Limits versus Average Scram Time 15 (BOC to EOR-5815 MWd/st) 3-48 MCPR Limits versus Average Scram Time 16 (EOR-5815 MWd/st to EOR-1815 MWd/st) iii Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report Figure No. Title Page 3-4C MCPR Limits versus Average Scram Time 17 (EOR-1815 MWd/st to EOC) 4-1 Flow-Dependent LHGR Multiplier 20 (LHGRFAC F) versus Core Flow 4-2A Power-Dependent LHGR Multiplier 21 (LHGRFAC p ) versus Core Power 4-28 Power-Dependent LHGR Multiplier 22 (LHGRFAC p ) versus Core Power (Main Turbine Pressure Regulator System in nco 3.3. 13.c) 4-3 . LHGR versus Peak Pellet Exposure 23 iv Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report

1.0 INTRODUCTION

The Core Operating Limits Report (COLR) for Plant Hatch Unit 1 Cycle 26 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 6). Results from the reload analyses for the fuel in Unit 1 Cycle 26 are documented in References 3 through 5.

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 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) .

Based upon the reload analysis for this cycle , the following operability requirement is defined for Unit 1 operation .

TABLE 1-1 Main Turbine Bypass System Operability System Operability Req,uirement Main Turbine Bypass System Operable At least two bypass valves must be (Technical Specification 3.7.7) operable Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report From a fuel thermal limits perspective, the following limitations are placed on Unit 1 Cycle 26 operation.

TABLE 1-2 Equipment-Out-of-Service Limitations Equipment I Condi,tion I Limitation EOC-RPT Out of Service and Main Turbine Option B scram speeds must be Bypass System Inoperable simultaneously met (in place) at CTP ~ 45% RTP Main Turbine Pressure Regulator System in Option B scram speeds must be TLCO 3.3.13.c met (in place) at CTP ~ 45% RTP

  • CTP must be :5 2000 MWth Single-Loop Operation (SLO)
  • Core Flow must be :5 56% of Rated NOTE:

The power distribution limits in this report apply to plant operation with all equipment in service, unless otherwise specified.

2 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 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 .

3 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 1.0

'i:L I

I I

I TLO I U I LL I

~ 09 TLO

~ ... 0.86 1i

a::l 0.8 0::

I SLO I

C)

I:

~ 07 1:

~

"a.c: 0.6

~

~

C

~

o u::: 0.5 0.4 61 30 40 50 60 70 80 90 100 110 Core Flow (% of Rated)

Operating Conditions F SLO ITLO 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 4 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 14.0 Average Planar Exposure APLHGR Limit 130 -- ._- -,-t ... _- ._"- t-- - f---- - - -. - . -.- - -. - - ~

(GWd/st) (kW1ft) 12.0 ~

0.00 12.82 14.51 12.82 11 .0 19.13 12.82 57.61 63 .50 8.00 5.00

£"

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od:

7.0 1---- f - - - _._- - r -- ' - --- - - - --f - + \ -.

6.0 ~

5.0 \

4.0 0.0 5.0 10.0 15.0 20 .0 25.0 30.0 35.0 40.0 45.0 SO.O 55.0 60 .0 65.0 70.0 Average Planar Exposure (GWdfST)

FIGURE 2-2 APLHGR Limit versus Average Planar Exposure 5 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 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 main turbine bypass system, and the status of the main turbine pressure regulator system.

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

a. For 24% ~ power < 45%, the power-dependent MCPR limit, MCPR p , as determined by Table 3-1.
b. For power  ;::0: 45%, 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, K p , and the rated-power OLMCPR, as determined by Table 3-1 .

As shown on the figures for absolute MCPR, 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 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 OLMCPR corresponds to 't o If't has not been determined, Option A limits must be used.

6 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report The average scram time of the control rods, ", is defined as:

"ave - "B

" = 0, or , whichever is greater.

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

r l1 /2 1 NI 1

= 11 + 1.65

  • cr *1-1

! IN;!

L J

= 1 where
11 = 0.822 sec (mean scram time used in the transient analysis).

cr = 0.018 sec (standard deviation of 11).

n IN;,

"ave = hi n

IN;

=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.

"; = 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 .

7 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report TABLE 3-1 MCPR Operating Flexibility Options Rated Power OLMCPRs BOC to EOR - 5815 Figure 3-4A EOR - 5815 to EOR - 1815 Figure 3-4B EOR - 1815 to EOC Figure 3-4C MCPR p from ~ 24% to < 45% Power Main Turbine 8ypass System Operable* Figure 3-1A Main Turbine Bypass System Inoperable Figure 3-18 Kp for Power ~ 45% of Rated Main Turbine Main Turbine EOC-RPT Bypass System Pressure Regulator System In Service Operable* System Status Yes Yes TLCO 3.3.13 .a or b Figure 3-3A No Yes TLCO 3.3.13.a or b Figure 3-3A Yes No TLCO 3.3.13.a or b Figure 3-3A No No TLCO 3.3.13.a or b Figure 3-38**

Yes/No Yes/No TLCO 3.3.13.c Figure 3-3C**

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

  • At least two bypass valves must be operable
    • Option B scram speeds must be met (in place) at CTP ~ 45% RTP 8 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 3.0 I

I 2.8

~~ l.--1.---1>60% FIOWI I

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1.8 H ~ 60% FIOWv( I I

I I

I 1.6 24 27 28 30 33 36 39 42 45 Core Power (% of Rated)

MCPRp(TLO) = A + B*P MCPRp(SLO) = MCPRp(TLO) + 0.02 F P A B

5 60 24:5 P < 28 4.1235 -0.06673

> 60 24:5 P < 28 40635 -0.04708

5 60 28:5 P < 45 2.0810 -0.00624

> 60 28:5 P < 45 2.4861 -0.01067 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 45% of Rated Core Power 9 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 4.0 I I

I 3.8

-j > 60% Flow I

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1.8 l:s; 60% Flow ..- I I

I 1.6 24 27 28 30 33 36 39 42 45 Core Power(% of Rated)

MCPRp(TLO) = A + B*P MCPRp(SLO) = MCPRp(TLO) + 0.02 F P A B

~ 60 24 ~ P < 28 4.3600 -0.07000

> 60 24 ~ P < 28 6 .5876 -0.11670

~ 60 28 ~ P < 45 2.0810 -0.00624

> 60 28 ~ P < 45 2.4861 -0.01067 P = Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 3-1B Power-Dependent MCPR Limit (MCPR p) versus Core Power from 24% to 45% of Rated Core Power (Main Turbine Bypass System Inoperable) 10 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 1.6

l1 .5 D

U

"~ I l

Maximum Flow 107%

I I

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J 1.4

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0::

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U MinTLO I

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OLMCPR C

"0 c: 1.3

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i

.2 11..

1.2 1.1 30 40 50 60 70 80 90 100 110 Core Flow (% of Rated)

MCPRF(TLO) = A + B*F MCPRF(SLO) = MCPRF(TLO) + 0.02 Flow A B 30 < F :0:;; 71 .160 1.697 -0.00586 71.160 < F 1.280 0.00000 F = Percent of Rated Core Flow FIGURE 3-2 Flow-Dependent MCPR Limit (MCPR F) versus Core Flow 11 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 1.3 0::

.:: ~

a.

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1.0 45 50 55 60 65 70 Core Power(% of Rated) 75 80 85 90 95 100 Kp = A + 8*P P A 8 45 ~ 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 12 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 1.3

~

ii

'3

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1.0 45 50 55 60 65 70 75 80 85 90

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95 100 Core Power(% of Rated)

Kp =A+ 8*P P A 8 45 ~ P < 60 1.6702 -0.00867 60 ~ P < 90 1.3308 -0.00301 90~ P 1.5961 -0.00596 P = Percent of Rated Core Power FIGURE 3-38 Power-Dependent MCPR Multiplier (Kp) versus Core Power (EOC-RPT System Out of Service and Main Turbine Bypass System Inoperable Simultaneously) 13 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report

1. 5 1.4 r---. ----.

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1 .0 45 50 55 60 65 70 75 80 85 90

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95 100 Core Power (% of Rated)

Kp = A + 8*P P A 8 45 < P < 70 1.6268 -0.00451 70 ~ P 2.0367 -0.01037 P =Percent of Rated Core Power FIGURE 3-3C Power-Dependent MCPR Multiplier (Kp) versus Core Power (Main Turbine Pressure Regulator System in nco 3.3. 13.c) 14 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 1.52 1.50 1.48 EOC*RPT Out of Servi ce Plus Main Turbine Bypass System Inoperable V-1.46

~

I-'"

_ _ _ _ r 1.44

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1.42 r-- ~

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':::;e 1.40 ~

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~ 138

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~ - -- I EOC.RPT Out of Service I 1.36

~

1.34 1.32 1.30

--- IMain Turb ine BypassSystem I Inoperable 1.28 l EOC*RPT In Service and Main Turbine Bypass System Operable r 1.26 0 .0 0. 1 0 .2 0.3 0 .4 0. 5 0 .6 0 .7 0.8 0.9 10 Tau OLMCPR(SLO) = OLMCPR(TLO) + 0.02 Operating Conditions OLMCPR(TLO)

EOC-RPT Bypass Valve System 't = 0.0 't = 1.0 In Service O~erable 1,28 1.29 Out of Service Operable 1,32 1.43 In Service Inoperable 1,31 1,34 Out of Service Inoperable 1.37 1.48 FIGURE 3-4A MCPR Limits versus Average Scram Time (BOC to EOR - 5815 MWd/st) 15 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 1.56 1.54 1.52 1.50 1.48 EOC-RPT Out of Service Plus Main Tu rbine Bypass System Inoperable

... --~--

~

-V-- --- -- ---

~

1.46

~

E 1.44

~ I EOC-RPT Out of Service I t"::;: 1.42

_V-- I--

1.40

~

I Main Turbine Bypass System I 1.38 I Inoperable I 1.:16 1.34 I

EOC-RPT In Service and Main Turbine Bypass System Operable r 1.32 1.30 00 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Tau OLMCPR(SLO) = OLMCPR(TLO) + 0.02 Operating Conditions OLMCPR(TLO)

EOC-RPT Bypass Valve System 't = 0.0 't = 1.0 In Service Operable 1.34 1.37 Out of Service Operable 1.38 1.49 In Service Inoperable 1.38 1.41 Out of Service Inoperable 1.42 1.53 FIGURE 3-4B MCPR Limits versus Average Scram Time (EOR - 5815 MWd/st to EOR - 1815 MWd/st) 16 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 1.68 1.66 1.64 f-1.62 EOC*RPT Out of Service 1.60 Plus Main Turbine Bypass System Inoperable .-

i" 1.58

--- - ~

1.56 III

"" 1. 54 E

_~ I EOC*RPT Out of Service

~

Q.

1.52 il 1 50 1.48

---- r-I Main Turbine Bypass System I 1.46 1.44 1.42 1.40

I Inoperable I

1.38 I EOC*RPT In Service and Main Turbine Bypass System Operable I 1.36 0.0 0.1 0.2 0.3 0.4 0.5 0 .6 0.7 0 .8 0 .9 1.0 Tau OLMCPR(SLO) = OLMCPR(TLO) + 0.02 Operating Conditions OLMCPR(TLO)

EOC-RPT Bypass Valve System 't = 0.0 't = 1.0 In Service Operable 1.38 1.41 Out of Service Operable 1.44 1.61 In Service Inoperable 1.42 1.45 Out of Service Inoperable 1.48 1.65 FIGURE 3-4C MCPR Limits versus Average Scram Time (EOR - 1815 MWdlst to EOC) 17 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 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 U0 2 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 that rod . 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 the most limiting Gd rods.

18 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report TABLE 4-1 LHGR Operating Flexibility Options LHGRFAC p ,

Main Turbine Pressure Regulator System Status TLCO 3.3.13.a or b Figure 4-2A TLCO 3.3 .13.c Figure 4-28*

  • Option B scram speeds must be met (In place) at CTP ~ 45% RTP 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 I Max. BOL Knee 1 Knee 1 Knee2 Knee 2 EOL EOL Gd (w/o) Gd (w/o) (kW/ft) (kW/ft) (GWd/st) 1 (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 5.00 13.100 13.100 14.190 7.821 56.317 4.888 62.082 0.00 6.00 13.100 13.100 14.190 7.821 56.317 4.888 62 .082 0.00 7.00 13.200 13.200 14.298 7.881 56.747 4.925 62.556 5.00 5.00 12.521 12.521 12.389 7.475 55.443 4.672 61 .335 5.00 6.00 12.400 12.400 12.247 7.403 54.884 4.627 60.718 5.00 7.00 12 .300 12.300 12.132 7.343 54.424 4 .590 60.212 6.00 6.00 12.255 12.255 12.276 7.316 54.999 4 .572 60 .845 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 6.00 8.00 12.100 12.100 12.095 7.224 54.275 4.515 60.047 7.00 8.00 11.900 11.900 12.055 7.104 54.117 4.440 59 .873 8.00 8.00 11.755 11.755 12.079 7.018 54.215 4.386 59.981 BOL = Beginning of Life (zero exposure)

EOL = End of Life (maximum licensed pellet exposure) 19 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 1.0 I TLO/SLO I

~/~

/

~

...<Il 08

/

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!E 0.7

./

/

.J 1:

<Il V SLO

'0 c:

~ 0.6 II)

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~

.2 I MAXFLOW=107% I u.. 0.5 0.4 30 40 50 60 70 80 90 100 110 Core Flow (% of Rated)

LHGRFAC F = A + 8*F Operating Conditions Values of Variables F SLO I TLO A 8 30:o::;F<50.70 SLO I TLO 0.4574 0 .006758 50.70:0::; F < 80.29 TLO 0.4574 0.006758 50 .70:0::; F SLO 0.8000 0.000000 80.29:0::; F TLO 1.0000 0.000000 F - Percent of Rated Core Flow FIGURE 4-1 Flow-Dependent LHGR Multiplier (LHGRFAC F ) versus Core Flow 20 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 1.1 CL 1.0 U ~

i1 .............

ffi V V J:

2-G>

0.9 I

V

~

I I .............

J

==

0.8 l ,; 60% Core Flow I I I ..----

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V 1: 0.7 G> H "0 l,.....

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Co V c3 0.6

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a 0.. > 60% Core Flow 0.5 0.4 vi 24 28 32 36 40 44 45 48 52 56 60 64 68 72 76 80 84 88 92 96 100 Core Power(% ofHated)

LHGRFAC p = A + B*P Operating Conditions Values of Variables P F A B 24 ~ P < 28 F> 60 0.17924 0.009670 24 < P < 28 F < 60 0.10366 0.016741 28 ~ P < 45 All 0.52261 0.003617 45 ~ P All 0.47760 0.005224 P = Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 4-2A Power-Dependent LHGR Multiplier (LHGRFAC p ) versus Core Power 21 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 1.1 J 1.0 ,,/'

~

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0.9 .,/

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V "5 0.8 /'

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> 60% Core Flow I 0.5 0 .4 lJ

~ ~ ~ ~ ~ M ~ ~ ~ W M M n ro M ~ M ~  % 100 Core Power(% of Rated)

LHGRFAC p = A + B*P Operating Conditions Values of Variables P F A B 24 ::::; P < 28 F > 60 0.17924 0.009670 24 ::::; P < 28 F ::::; 60 0.10366 0.016741 28 ~ P < 70 All 0.52261 0.003617 70 ::::; P All 0.25270 0.007473 P = Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 4-2B Power-Dependent LHGR Multiplier (LHGRFAC p) versus Core Power (Main Turbine Pressure Regulator System in TLCO 3.3. 13.c) 22 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 14.0 Peak U02 Rods Pellet 13.0 12.0

"~ ......

Exposure LHGR (GWd/st) 0.000 (kW/ft) 13.400 11 .0 " "" U02Rods I 14.515 57.607 63.504 13.400 8.000 5.000 ...

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Limiting Gd Rods :r:

oJ Peak 8.0 Pellet Exposure LHGR 7.0

"'-~

(GWd/st) (kW/ftt 0.000 11 .755 6.0

\ 1\

12.079 54.215 59.981 11 .755 7.018 4.386 5.0

\\ \

4.0 0.0 5.0 10.0 15.0 20.0 25.0 JO.O 35.0 40.0 45.0 SO.O 55.0 60.0 65.0 Peak Pellet Exposure (GWd/st)

FIGURE 4-3 LHGR versus Peak Pellet Exposure 23 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report 5.0 PBDA AMPLITUDE SETPOINT The amplitude trip setpoint in the Period Based Detection Algorithm in the OPRM system shall not exceed the value reported in the Table below. This applies to instruments 1C51 K615 A, B, C, and D.

TABLE 5-1 OPRM Setpoint OLMCPR OPRM Set oint

1.28 1.15 24 Version 1

Plant Hatch Core Operating Unit 1 Cycle 26 Limits Report

6.0 REFERENCES

1. "General Electric Standard Application for Reactor Fuel," NEDE-24011-P-A-18, April 2011 , and the US Supplement, NEDE-24011-P-A-18-US , April 2011 .
2. GNF letter MEF-SNC-HT1-11-137, "Hatch 1 Reload 25 Cycle 26 Supplemental Reload Licensing Report and Fuel Bundle Information Report," M. Fitzpatrick to S.

Hoxie-Key, December 13, 2011.

3. Global Nuclear Fuel document 0000-0132-7784-SRLR, "Supplemental Reload Licensing Report for Edwin I. Hatch Nuclear Power Plant Unit 1, Reload 25 Cycle 26 ," Revision 0, December 2011.
4. Global Nuclear Fuel document 0000-0132-7784-FBIR , "Fuel Bundle Information Report for Edwin I. Hatch Nuclear Power Plant Unit 1, Reload 25 Cycle 26, "

Revision 0, December 2011.

5. SNC Nuclear Fuel Document NF-11-130, "Hatch-1 Cycle 26 Reload Licensing Analysis Report," Version 1, December 2011 .

. 6. GNF Document DB-0012.03 , "Fuel-Rod Thermal-Mechanical Performance Limits for GE14C, " Rev. 2, September 2006.

25 Version 1

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