NL-10-0664, Cycle 25 Version 1 Core Operating Limits Report

Cycle 25 Version 1 Core Operating Limits Report

ML101270058
Person / Time
Site:	Hatch
Issue date:	05/04/2010
From:	Ajluni M Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-10-0664
Download: ML101270058 (32)

Text

Southern Nuclear Operating Company, Inc.

SOUTHERNA COMPANY May 4,2010 Docket Nos.: 50-321 NL-10-0664 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant-Unit 1 Cycle 25 Version 1 Core Operating Limits Report 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 25 Version 1.

This letter contains no NRC commitments. If there are any questions, please contact Mr. N. J. Stringfellow at 205-992-7037.

Respectfully submitted,

~~~

M. J. Ajluni Manager - Nuclear Licensing MJA IPAHI

Enclosure:

Core Operating Limits Report HNP Unit 1 Cycle 25 Version 1

U. S. Nuclear Regulatory Commission NL-10-0664 Page 2 cc:

Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President (w/o enclosure)

Mr. D. R. Madison, Vice President - Hatch (w/o enclosure)

Ms. P. M. Marino, Vice President - Engineering (w/o enclosure)

RType: CHA02.004 U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Mr. R. E. Martin, NRR Project Manager - Hatch Mr. E.D. Morris, Senior Resident Inspector - Hatch Mr. P. Boyle, NRR Project Manager State of Georgia Mr. C. Clark, Commissioner-Department of Natural Resources

Edwin I. Hatch Nuclear Plant* Unit 1 Cycle 25 Core Operating Limits Report Enclosure CORE Operating Limits Report Unit 1 Cycle 25, Version 1

SOUTHERN NUCLEAR OPERATING COMPANY EDWIN I. HATCH NUCLEAR PLANT Unit 1 Cycle 25 CORE OPERATING LIMITS REPORT Version 1 Southern Nuclear Operating Company Post Office Box 1295 Birmingham, Alabama 35201

Edwin I. Hatch Nuclear Plant Unit 1 Cycle 25 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 23 6.0 References 24 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report TABLES Table No.

1-1 3-1 4-1 4-2 5-1 Equipment-Out-of-Service Limitations MCPR Operating Flexibility Options LHGR Operating Flexibility Options LHGR Limit versus Peak Pellet Exposure OPRM Setpoint 7

18 18 23 ii Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report FIGURES Figure No.

Title Page 2-1 Flow-Dependent APLHGR Multiplier (MAPFACd versus Core Flow 3

2-2 APLHGR Limit versus Average Planar Exposure 4

3-1A Power-Dependent MCPR Limit (MCPRp) versus Core Power from 24% to 45% of Rated Core Power 8

3-1B Power-Dependent MCPR Limit (MCPRp) versus Core Power from 24% to 45% of Rated Core Power (Turbine Bypass Valves Inoperable) 9 3-2 Flow-Dependent MCPR Limit (MCPRF) versus Core Flow 10 3-3A Power-Dependent MCPR Multiplier (Kp) versus Core Power 11 3-3B Power-Dependent MCPR Multiplier (Kp) versus Core Power (EOC-RPT System Out of Service and Turbine Bypass Valves Inoperable Simultaneously) 12 3-3C Power-Dependent MCPR Multiplier (Kp) versus Core Power (Main Turbine Pressure Regulator System in TLCO 3.3. 13. c) 13 3-4A MCPR Limits versus Average Scram Time (BOC to EOR-4944 MWd/st) 14 3-4B MCPR Limits versus Average Scram Time (EOR-4944 MWd/st to EOR-1444 MWd/st) 15 3-4C MCPR Limits versus Average Scram Time (EOR-1444 MWd/st to EOC) 16 iii Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report Figure No.

Title Page 4-1 Flow-Dependent LHGR Multiplier (LHGRFACF) versus Core Flow 19 4-2A Power-Dependent LHGR Multiplier (LHGRFACp ) versus Cpre Power 20 4-28 Power-Dependent LHGR Multiplier (LHGRFACp ) versus Core Power (Main Turbine Pressure Regulator System in TLCO 3.3. 13.c) 21 4-3 LHGR versus Peak Pellet Exposure 22 iv Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report

1.0 INTRODUCTION

The Core Operating Limits Report (COLR) for Plant Hatch Unit 1 Cycle 25 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 25 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 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 Inoperable Simultaneously Option B scram speeds must be met (in place) at CTP 2: 45% RTP Main Turbine Pressure Regulator System in TlCO 3.3.13.c Option B scram speeds must be met (in place) at CTP ~ 45% RTP Single-loop Operation (SLO)

• CTP S 2000 MWth

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

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

1 Version 1

Plant Hatch Unit 1 Cycle 25 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, MAPFACF, from Figure 2-1.

2 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report 1.0 J

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Operating Conditions MAPFACF F

SLO/TLO 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 (MAPFACF) versus Core Flow 3

Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report Average Planar APLHGR Exposure Limit (GWd/st)

(kW/ft) 0.00 12.82 14.51 12.82 19.13 12.82 57.61 8.00 63.50 5.00 14.0 13.0 12.0 11.0

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FIGURE 2*2 APLHGR Limit versus Average Planar Exposure 4

Version 1

Plant Hatch Unit 1 Cycle 25 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 status of the main turbine pressure regulator system.

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

a. For 24% s; power < 45%, the power-dependent MCPR limit, MCPRp, as determined by Table 3-1.

b. For power ~ 45%, the OLMCPR is the greater of either:

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

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

As shown on Figures 3-1A, 3-18, 3-2, 3-4A, 3-48, and 3-4C, 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, 3-48, 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 8 values correspond to 't = 0.0. For scram times between Option A and Option 8, the rated-power OLMCPR corresponds to 't. If't has not been determined, Option A limits must be used.

5 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report The average scram time of the control rods, " is defined as:

'ave - '8

, = 0, or

, whichever is greater.

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= 0.018 sec (standard deviation of Il).

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i=l nLNi i=l where:

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

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

'j = 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 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report TABLE 3*1 MCPR Operating Flexibility Options Rated Power OLMCPRs BOC to EOR - 4944 Figure 3-4A EOR - 4944 to EOR -1444 Figure 3-4B EOR -1444 to EOC Figure 3-4C MCPRp from ~ 24% to < 45% Power Turbine Bypass Valves Operable Figure 3-1A Turbine Bypass Valves Inoperable Figure 3-1B Kp for Power ~ 45% of Rated Main Turbine EOR'" End of rated conditions (100% power, 100% flow, ARO, with nominal feed water temperature)

EOC-RPT System Turbine Bypass Pressure Regulator In Service Valves 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 3-3B*

YeslNo YeslNo TLCO 3.3.13.c Figure 3-3C*

• Option B scram speeds must be met (in place) at CTP ~ 45% RTP 7

Version 1

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

P A

B S60 24 s P < 28 2.1500 0.00000

> 60 24 S P < 28 3.3400

-0.03000 S60 28 s P < 45 2.0810

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> 60 28 S 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 8

Version 1

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

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-0.11670 s60 28 ~ P < 45 2.0810

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-0.01067 P - Percent of Rated Core Power F = Percent of Rated Core Flow FIGURE 3-18 Power-Dependent MCPR Limit (MCPRp) versus Core Power from 24% to 45% of Rated Core Power (Turbine Bypass Valves Inoperable) 9 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report 30 40 50 60 70 Core Flow (% of Rated)

MCPRF(TLO) =A + B*F MCPRF(SLO) =MCPRF(TLO) + 0.02 Flow A

B 30:<s; F :<S; 66.041 1.697

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80 90 100 110 F - Percent of Rated Core Flow FIGURE 3-2 Flow-Dependent MCPR Limit (MCPRF) versus Core Flow 10 Version 1

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-0.00375 P - Percent of Rated Core Power FIGURE 3-3A Power-Dependent MCPR Multiplier (Kp) versus Core Power 11 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report 1.3r---------~----------------~----~----_,----,_----~----~--_.

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-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 Turbine Bypass Valves Inoperable Simultaneously) 12 Version 1

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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 TLCO 3.3.13.c) 13 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report 1.52 r---...,....--.......---,....----r-------------...,....-------,

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EOC*RPT Bypass V Operatin! conditiOs

't = 0.0

't = 1.0 In Service Operable 1.31 1.33 Out of Service Operable 1.36 1.47 In Service Inoperable 1.34 1.37 Out of Service Inoperable 1.40 1.51 OLMCPR(SLO) = OLMCPR(TLO) + 0.02 FIGURE 3-4A MCPR Limits versus Average Scram Time (SOC to EaR - 4944 MWdlst) 14 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report 1.S2l--*************.---r---+----r------1---'-*----- ----.....::::iiI'~""=-----I 1.50 EOC-RPT Out of ServIce Plus BPV Inoperable 1.48 \\------t-------j---..... t---------L---!---:...........:::..--+------r----:::J.,.~=--_+_-

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EOC*RPT Bypass Valves

't =0.0

't =1.0 In Service Operable 1.35 1.38 Out of Service Operable 1.39 1.50 In Service Inoperable 1.38 1.41 Out of Service Inoperable 1.42 1.53 OLMCPR(SLO) =OLMCPR(TLO) + 0.02 FIGURE 3*4B MCPR Limits versus Average Scram Time (EOR - 4944 MWd/st to EOR - 1444 MWd/st) 15 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report 1.68,------r------------;------;---.,..-----,----.,..---.,..------,

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o 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Tau Conditions OLMCPR TLO)

Bypass Valves

't =0.0

't =1.0

~--I In Service 0 erable 1.38 Out of Service 0 erable 1.44 In Service Ino erable 1.42 Out of Service Ino erable 1.47 OLMCPR(SLO) =OLMCPR(TLO) + 0.02 FIGURE 3-4C MCPR Limits versus Average Scram Time (EOR - 1444 MWdlst to EOC) 16 Version 1

Plant Hatch Unit 1 Cycle 25 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, LHGRFACF, from Figure 4-1, or

b. The power-dependent multiplier, LHGRFACp, 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, Figures 4-3 shows the LHGR limits for U02 rods and for the most limiting (7.0 w/o) Gd rods in the core.

17 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report TABLE 4*1 LHGR Operating Flexibility Options LHGRFACp 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 (m place) at CTP;:: 45% RTP TABLE 4*2 LHGR limit versus Peak Pellet Exposure Six Inch Segment Gd (w/o)

Rod Maximum Gd (w/o)

LHGR limit at BOL (kW/ft)

LHGR limit at Knee 1 (kW/ft)

Exp. at Knee 1 (GWd/st)

LHGR limit at Knee 2 (kWIft)

Exp. at Knee 2 (GWdlst)

LHGR limit at EOL tkWIft)

Exp. at EOL (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 5.00 5.00 6.00 12.521 12.255 12.521 12.255 12.389 7.475 7.316 55.443 54.999 4.672 4.572 61.335 60.845 6.00 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

'" 275 4.515 60.047 7.00 7.00 12.000 12.000 12.174 7.164 54.589 4.478 60.394 BOL Beglnmng of Life (zero exposure)

EOL = End of Life (maximum licensed pellet exposure) 18 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report 1.0

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

LHGRFACF =A + 8*F Operating Conditions Values of Variables F

SLO/TLO A

8 30:5: F < 50.70 SLO/TLO 0.4574 0.006758 50.70:5: F < 80.29 TLO 0.4574 0.006758 50.70:5: F SLO 0.8000 0.000000 80.29 sF TLO 1.0000 0.000000 F

Percent of Rated Core Flow FIGURE 4*1 Flow-Dependent LHGR Multiplier (LHGRFACF) versus Core Flow 19 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating limits Report 1.1,---------r--r---r--r---r-..,.--r-------,---r----,

> 60% Core Flow 0.4 -!----40-----4-----'-I--I----I--I---I---I---I-_I_-I----I-_!_--I----I 24 28 32 36 40 44 45 48 52 56 60 64 68 72 76 80 84 68 92 96 100 Core Power (% of Rated)

LHGRFACp =A + B*P Operating Conditions Values of Variables P

F A

B 24:s P < 28 F> 60 0.17924 0.009670 24:s P < 28 F:s 60 0.26124 0.011670 28 < P < 45 All 0.52261 0.003617 45:s P All 0.47760 0.005224 P = Percent of Rated Core Power F

Percent of Rated Core Flow FIGURE4-2A Power-Dependent LHGR Multiplier (LHGRFACp) versus Core Power 20 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report 1.0

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LHGRFACp =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 0.26124 0.011670 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 FIGURE4-2B Power-Dependent LHGR Multiplier (LHGRFACp) versus Core Power (Main Turbine Pressure Regulator System in TLCO 3.3.13.c) 21 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report 14.0,---,------,-------,---,--,---,------------------,

U02 Rods Peak Pellet Exposure (GWdlst)

LHGR (kW/ft) 0.000 14.515 57.607 63.504 13.400 13.400 8.000 5.000 Limiting Gel Rods Peak Pellet Exposure LHGR jGWdlstl (kW/ftl 0.000 12.000 12.174 12.000 54.589 7.164 60.394 4.478 13.0

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FIGURE 4-3 LHGR versus Peak Pellet Exposure 22 Version 1

Plant Hatch Unit 1 Cycle 25 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

~ 1.31 23 Version 1

Plant Hatch Unit 1 Cycle 25 Core Operating Limits Report

6.0 REFERENCES

1.

"General Electric Standard Application for Reactor Fuel," NEDE-24011-P-A-16, October 2007, and the US Supplement, NEDE-24011-P-A-16-US, October 2007.

2.

GNF letter MJM-SNC-HT1-09-077.DOC, "H1 R24 SRLR and FBIR," M. Mneimneh to S. Hoxie-Key, November 19, 2009.

3.

Global Nuclear Fuel document 0000-0099-0707 -SRLR, "Supplemental Reload Licensing Report for Edwin I. Hatch Nuclear Power Plant Unit 1, Reload 24 Cycle 25," Revision 0, November 2009.

4.

Global Nuclear Fuel document 0000-0099-0707-FBIR, "Fuel Bundle Information Report for Edwin I. Hatch Nuclear Power Plant Unit 1, Reload 24 Cycle 25,"

Revision 0, November 2009.

5.

SNC Nuclear Fuel Document I\\IF-10-013, "Hatch-1 Cycle 25 Reload Licensing Analysis Report," Version 1, February 2010.

6.

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

24 Version 1