NL-20-0242, Unit 2 Cycle 26 Core Operating Limits Report Version 2.0
| ML20070S186 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 03/10/2020 |
| From: | Gayheart C Southern Nuclear Operating Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20071D291 | List: |
| References | |
| NL-20-0242 | |
| Download: ML20070S186 (57) | |
Text
A Southern Nuclear Chery l A. Gayheart Regu latory Affairs Director 3535 Co lo nnade Parkwa}
Otrmingham. /\L 35~-13 105 99:2 53 16 tel 20: 992 7795 n'" to this letter contains Proprietary Information to be caga) hea '!*so uthemco com withheld from public disclosure per 10 CFR 2.390 . When separated from Enclosure 1 this transmittal document is decontrolled .
MAR 1 0 2020 Docket No.: 50-366 NL-20-0242 U. S. Nuclear Regulatory Commission ATTN : Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant - Unit 2 Cycle 26 Core Operating Limits Report Version 2.0 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 (HNP) Unit 2 Cycle 26, Version 2.0.
The enclosed documentation contains proprietary information as defined by 10 CFR 2.390 .
Global Nuclear Fuel (GNF) , as the owner of the proprietary information , has executed the enclosed affidavit, which identifies that the enclosed proprietary information has been handled and classified as proprietary , is customarily held in confidence, and has been withheld from public disclosure. The proprietary information was provided to SNC in a GNF transmittal that is referenced by the affidavit. The proprietary information has been faithfully reproduced in the enclosed documentation, such that, the affidavit remains applicable . GNF hereby requests that the enclosed proprietary information provided in Enclosure 1 to this letter be withheld from public disclosure in accordance with the provisions of 10 CFR 2.390 and 9.17. A non-proprietary version of the COLR is provided as Enclosure 2 . This affidavit is also provided in Enclosure 1 to this letter and identifies that the designated information has been handled and classified as proprietary to GNF.
This letter contains no NRC commitments. If you have any questions, please contact Jamie Coleman at 205 .992 .6611 .
Respectfully submitted ,
Regulatory Affairs Director
U. S. Nuclear Regulatory Commission NL-20-0242 Page 2 CAGffLE/scm Enclosures : 1. Unit 2 Cycle 26 Core Operating Limits Report Version 2.0 PROPRIETARY INFORMATION and Global Nuclear Fuel- Americas Affidavit
- 2. Unit 2 Cycle 26 Core Operating Limits Report Version 2.0 NON-PROPRIETARY INFORMATION Cc: Regional Administrator, Region II NRR Project Manager- Hatch Senior Resident Inspector- Hatch RTYPE : CHA02 .004
Edwin I. Hatch Nuclear Plant- Unit 2 Cycle 26 Core Operating Limits Report Version 2.0 Enclosure 2 Unit 2 Cycle 26 Core Operating Limits Report Version 2.0 NON-PROPRIETARY INFORMATION
Non-Proprietary Information SOUTHERN NUCLEAR OPERATING COMPANY EDWIN I. HATCH NUCLEAR PLANT Unit 2 Cycle 26 CORE OPERATING LIMITS REPORT Version 2
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 TABLE OF CONTENTS Section Title Page 1.0 Introduction 7 2.0 APLHGR Operating Limits 11 3.0 MCPR Operating Limits 13 4.0 LHGR Operating Limits 38 5.0 Operating Pressure Limits 50 6.0 References 54 2
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 TABLES Table No. Title Page 1-1 System Operability Requirements 8 1-2 Equipment Requirements 8 1-3 Equipment-Out-of-Service Limitations 9 1-4 Exposure Definitions 10 3-1 Cycle Specific MCPR Safety Limit 15 3-2 Power-Dependent MCPRp Limit Operating Flexibility Options (for Core Power ~ 28% of Rated) 15 3-3 Power-Dependent Kp MCPR Limit Multiplier Flexibility Options (for Core Power > 28% of Rated) 15 3-4 Rated-Power OLMCPR Operating Flexibility Options 16 4-1 Rated-Power LHGR Limits versus Peak Pellet Exposure 39 4-2 Flow-Dependent LHGRFACF Limit Multiplier Operating Flexibility Options 40 4-3 Power-Dependent LHGRFACp Limit Multiplier Operating Flexibility Options 40 5-1 Pressure Dependent Operating Flexibility Options 53 5-2 MFLCPR and MFLPD Limits versus Operating Pressure Regions 53 3
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 FIGURES Figure No. Title Page 2-1 APLHGR Limits Versus Average Planar Exposure 12 3-1 Flow-Dependent MCPR Limit (MCPRF) versus Core Flow 17 3-2A Power-Dependent MCPR Limit (MCPRp) versus Core Power 18 3-28 Power-Dependent MCPR Limit (MCPRP) versus Core Power (Main Turbine Bypass System Inoperable) 19 3-3A Power-Dependent MCPR Limit Multiplier (KP) versus Core Power 20 3-38 Power-Dependent MCPR Limit Multiplier (KP) versus Core Power (Main Turbine Pressure Regulator System in TLCO 3.3.13.c) 21 3-4A-1 Rated-Power TLO MCPR Limits versus Average SCRAM Time 22 3-4A-2 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable) 23 3-4A-3 Rated-Power TLO MCPR Limits versus Average SCRAM Time (EOC-RPT System Inoperable) 24 3-4A-4 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable &
EOC-RPT System Inoperable) 25 3-4A-5 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c) 26 3-4A-6 Rated-Power TLO MCPR Lim its versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c &
Main Turbine Bypass System Inoperable) 27 4
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 Figure No. Title Page 3-4A-7 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3. 3. 13.c &
EOC-RPT System Inoperable) 28 3-4A-8 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c &
Main Turbine Bypass System Inoperable &
EOC-RPT System Inoperable) 29 3-48-1 Rated-Power SLO MCPR Limits versus Average SCRAM Time 30 3-48-2 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable) 31 3-48-3 Rated-Power SLO MCPR Limits versus Average SCRAM Time (EOC-RPT System Inoperable) 32 3-48-4 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable &
EOC-RPT System Inoperable) 33 3-48-5 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c) 34 3-48-6 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c &
Main Turbine Bypass System Inoperable) 35 3-48-7 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c &
EOC-RPT System Inoperable) 36 3-48-8 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3. 3. 13. c &
Main Turbine Bypass System Inoperable &
EOC-RPT System Inoperable) 37 5
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 Figure No. Title Page 4-1A GNF2 & GNF3 LTA Flow-Dependent LHGR Limit Multiplier (LHGRFACF) versus Core Flow 41 4-18 GNF2 & GNF3 LTA Flow-Dependent LHGR Limit Multiplier (LHGRFACF) versus Core Flow (Main Turbine Bypass System Inoperable) 42 4-1C GNF3 Flow-Dependent LHGR Limit Multiplier (LHGRFACF) versus Core Flow 43 4-2A GNF2 & GNF3 LTA Power-Dependent LHGR Limit Multiplier (LHGRFACP) versus Core Power 44 4-28 GNF2 & GNF3 LTA Power-Dependent LHGR Limit Multiplier (LHGRFACp) versus Core Power (High Pressure Feedwater Heaters Out of Service) 45 4-2C GNF3 Power-Dependent LHGR Limit Multiplier (LHGRFACp) versus Core Power 46 4-2D GNF3 Power-Dependent LHGR Limit Multiplier (LHGRFACp) versus Core Power (High Pressure Feedwater Heaters Out of Service) 47 4-3A GNF2 & GNF3 LTA Rated-Power LHGR Limit versus Peak Pellet Exposure 48 4-38 GNF3 Rated-Power LHGR Limit versus Peak Pellet Exposure 49 5-1 Licensed Regions of Operating Dome Pressure versus Core Power 52 6
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2
1.0 INTRODUCTION
The Core Operating Limits Report (COLR) for Plant Hatch Unit 2 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 3) .
Results from the reload analyses for the fuel in Unit 2 Cycle 26 are documented in References 4 through 6.
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 This report also includes limits on the Maximum Fraction of Limiting Critical Power Ratio (MFLCPR) and Maximum Fraction of Limiting Power Density (MFLPD) thermal limit ratios, which may be used in conjunction with the standard core operating limits to allow operation with dome pressure down to 40 psi below nominal.
Related system operability requirements are defined in Table 1-1 . Equipment requirements which must be satisfied for the operating limits included in this report to remain applicable are defined in Table 1-2.
Operating limit flexibility options are provided for various equipment out-of-service conditions, dependent on the number of operating recirculation loops, operability of the main turbine bypass system, operability of the End-of-Cycle Recirculation Pump Trip (EOC-RPT) system , status of the main turbine pressure regulator system , and configuration of the high pressure feedwater heaters. Additional operational limitations associated with use of combinations of equipment out-of-service limits are defined in Table 1-3.
Operating limits are presented in this report as a function of fuel type, core power, core flow, average scram time, and exposure. These limits are not a function of feedwater temperature.
Cycle exposure intervals used in the presentation of limits in this report are defined in Table 1-4.
Operating limits between tabulated values presented in this report are based on linear interpolation.
7
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 TABLE 1-1 System Operability Requirements System Operability Requirement Main Turbine Bypass System Operable At least two bypass valves must be operable (Technical Specification 3. 7. 7)
TABLE 1-2 Equipment Requirements Equipment Requirement The maximum achievable core flow on the highest Recirculation Flow Control System licensed rod line must be limited to less than 107% of rated core flow When operating at greater than 55% core thermal Turbine Power/Load Unbalance Trip Logic power, the turbine Power/Load Unbalance (PLU) trip logic must be functional For any 4th stage feedwater heater configuration off-normal , High Pressure Feedwater Heaters Out of Service limits must be applied Feedwater Heaters (unless the standard LFWH analysis is demonstrated to remain applicable by BWR Fuel Engineering)
The Oscillation Power Range Monitor (OPRM)
APRM System Period Based Detection Algorithm (PBDA) amplitude trip setpoint must be set equal to 1.15 8
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 TABLE 1-3 Equipment-Out-of-Service Limitations Equipment I Condition Limitation Single-Loop Operation (SLO)
- Core power must be $ 2000 MWth
- Core flow must be $ 55% of rated Main Turbine Bypass System Inoperable OR Main Turbine Pressure Regulator System Dome pressure must be within +/- 10 psi of in TLCO 3.3.13.c nominal, as defined in Figure 5-1 OR High Pressure Feedwater Heaters Out of Service High Pressure Feedwater Heaters Out of Service No core operating limits available and Main Turbine Pressure Regulator System (Technical Specifications RAS 3.2.2 and 3.2.3 in TLCO 3.3.13.c simultaneously must be entered) 9
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 TABLE 1-4 Exposure Definitions
~
Exposure Label Definition Cycle Exposure soc Beginning of Cycle Exposure 0 MWd/ST MOC1 First Middle of Cycle Exposure EOR - 6000 MWd/ST Second Middle of Cycle MOC2 EOR - 3700 MWd/ST Exposure Projected exposure at end of rated power with all control rods EOR End of Rated Exposure out, rated core flow, and rated feedwater temperature EOC End of Cycle Exposure Exposure at cycle shutdown 10
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 2.0 APLHGR OPERATING LIMITS (Technical Specification 3.2.1)
For both two loop operation (TLO) and single loop operation (SLO), the APLHGR operating limit for each six inch axial segment of each fuel assembly in the core is the applicable fuel-type-specific APLHGR limit defined in Figure 2-1 .
No flow dependent or power dependent APLHGR limit multipliers (MAPFACF or MAPFACp) are required . For SLO, no unique limit on MAPFACF or MAPFACp is required .
These limits apply to operation over the full range of licensed dome pressure regions shown in Figure 5-1 .
11
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 15.0 GNF2 Average &
14 .0 '-
N Planar GNF3 LTA
"' '\
Exposure APLHGR :!!r..
13.0 GNF3 (GWd/ST) Limit (kW/ft) 12 .0
~
~
0.00 13.78 17.15 13.78 GNF2 11.0 r- & GNF3 LTA
~
60 .78 6.87 63.50 5.50 a=
§: 10.0
~~
.ll:
'~
Average GNF3 E 9.0 ~
- .:::i Planar APLHGR a:::
Exposure Limit ~ 8 .0
~
...J (GWd/ST) (kW/ft) a.
~
0.00 14.36 7.0 9.07 13.78 6.0 ~
21 .22 40 .82 13.01 10.75
\
5.0 57 .60 8.00 63 .50 6.00 4.0 0.0 10.0 W.O ~. 0 ~.0 W.O M .O 70.0 Average Planar Exposure (GWd/ST)
FIGURE 2-1 APLHGR Limits versus Average Planar Exposure 12
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 3.0 MCPR OPERATING LIMITS (Technical Specification 3.2.2)
The MCPR operating limit (OLMCPR) for each licensed equipment in or out of service operating flexibility combination is independent of fuel type, and is a function of core power, core flow, average scram time, and cycle exposure.
The cycle-specific MCPR safety limits (SLMCPRs) are specified in Table 3-1 .
For both two loop operation (TLO) and single loop operation (SLO), the OLMCPR is determined as follows:
- a. For 24% ~ core power ~ 28%, the greater of either:
- 1) The flow-dependent MCPR limit, MCPRF, as determined by Figure 3-1 ,
- 2) The power-dependent MCPR limit, MCPRp, as determined by Table 3-2.
- b. For core power> 28% , the greater of either:
- 1) MCPRF, as determined by Figure 3-1,
- 2) The product of the power-dependent MCPR limit multiplier (Kp), as determined by Table 3-3, and the scram-time dependent rated-power OLMCPR, as determined by Table 3-4.
These limits apply to operation with vessel dome pressure within +/- 10 psi of nominal pressure, as defined by the Region I pressure band shown in Figure 5-1 . With all equipment in service or with the EOC-RPT system inoperable, operation with vessel dome pressure down to 40 psi below nominal is licensed provided the additional restrictions identified in Section 5.0 are applied with the OLMCPR defined in this section.
13
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 In the 3-4A and 3-48 figures , Option A scram time rated-power OLMCPRs correspond to
-r = 1.0, where -r 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 -r = 0.0. For scram times between Option A and Option B, the rated-power OLMCPR corresponds to -r . If -r has not been determined, Option A limits must be used .
The average scram time of the control rods, -r , is defined as:
= 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) .
I 2
Nt Ts = ~+1.65
- cr
cr = 0.018 sec (standard deviation of ~t) .
N, = total number of active rods measured in Technical SpecificatiO!"JS Surveillance Requirement 3.1.4.1.
n = number of surveillance tests performed to date in the cycle.
Ni = number of active control rods measured in the i1h surveillance test.
11 I Ni-ri
= i=l
'[ ave 11 I Ni i=l where: Ti = average scram time to notch 36 of all rods in the i1h surveillance test.
14
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 TABLE 3-1 Cycle Specific MCPR Safety Limit TLO SLO 1.09 1.12 TABLE 3-2 Power-Dependent MCPRp Limit Operating Flexibility Options (for Core Power !:> 28% of Rated)
Equipment In/Out of Service Main Turbine EOC-RPT S~stem Main Turbine Pressure High Pressure Figure#
Bl!Qass S~stem Regulator S~stem Feedwater Heaters Operable Operable Status In Service TLCO 3.3 .13.a orb Yes/No Yes Yes/No 3-2A TLCO 3.3 .13. c Yes TLCO 3.3.13.a orb Yes/No No Yes/No 3-28 TLCO 3.3.13. c Yes Yes/No Yes/No TLCO 3.3.13.c No Not Licensed TABLE 3-3 Power-Dependent Kp MCPR Limit Multiplier Flexibility Options (for Core Power > 28% of Rated)
Equipment In/Out of Service Main Turbine Main Turbine Pressure High Pressure Figure#
EOC-RPT S~stem B~pass S~stem Regulator S~stem Feedwater Heaters Operable Operable Status In Service TLCO 3.3.13.a orb Yes/No 3-3A Yes/No Yes/No TLCO 3.3.13.c Yes 3-38 TLCO 3.3.13.c No Not Licensed 15
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 TABLE 3-4 Rated-Power OLMCPR Operating Flexibility Options Figure#
Equipment In/Out of Service TLO SLO Equipment In Service 3-4A-1 3-4B-1 Main Turbine Bypass System Inoperable 3-4A-2 3-4B-2 EOC-RPT System Inoperable 3-4A-3 3-4B-3 Main Turbine Bypass EOC-RPT System AND 3-4A-4 3-4B-4 System Inoperable Inoperable Main Turbine Pressure Regulator System in TLCO 3.3.13.c 3-4A-5 3-4B-5 Main Turbine Bypass 3-4A-6 3-4B-6 System Inoperable EOC-RPT System 3-4A-7 3-4B-7 Main Turbine Pressure Inoperable Regulator System in AND TLCO 3.3.13.c Main Turbine Bypass System Inoperable AND 3-4A-8 3-4B-8 EOC-RPT System Inoperable High Pressure Feedwater Heaters Out of Service 3-4A-1 3-4B-1 Main Turbine Bypass 3-4A-2 3-4B-2 System Inoperable EOC-RPT System 3-4A-3 3-4B-3 Inoperable High Pressure Feedwater AND Heaters Out of Service Main Turbine Bypass System Inoperable AND 3-4A-4 3-4B-4~
EOC-RPT System Inoperable 16
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.60 I TLO I 1.50
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0 ii 1.20 1.10 30.0 40.0 50.0 60.0 70.0 80.0 90 .0 100 .0 110 .0 Core Flow(% of Rated)
Flow (%of Rated) MCPRF (TLO) 30.0 1.56 90.0 1.20 110.0 1.20 MCPRF(SLO) =MCPRF(TLO) + 0.04 FIGURE 3-1 Flow-Dependent MCPR Limit (MCPRF) versus Core Flow 17
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 2.80 I TLO I
2.70
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Flow (%of Rated) Power (%of Rated) MCPRp(TLO) 24.0 2.45
~ 60.0
~ 28.0 2.34 24.0 2.34
< 60.0
~ 28.0 2.34 MCPRp(SLO) =MCPRp(TLO) + 0.04 FIGURE 3-2A Power-Dependent MCPR Limit (MCPRp) versus Core Power 18
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 2.60
-- I Flow >60% I I TLO I
2.70
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Flow (% of Rated) Power(% of Rated) MCPRp(TLO) 24.0 2.78
~ 60.0
- 28.0 2.69 24.0 2.63
< 60.0
- 28.0 2.51 MCPRp(SLO) = MCPRp(TLO) + 0.04 FIGURE 3-28 Power-Dependent MCPR Limit (MCPRp) versus Core Power (Main Turbine Bypass System Inoperable) 19
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.500 1.400
~ .....
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~ 1.300 .........
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30.0 40.0 50.0 55 60 .0 70.0 80.0 90.0 100.0 28 Core Power(% of Rated)
Power{% of Rated) Kp {TLO/SLO)
> 28.0 1.376
- 55.0 1.235
> 55.0 1.150 60.0 1.150 85.0 1.065 100.0 1.000 FIGURE 3-3A Power-Dependent MCPR Limit Multiplier (KP) versus Core Power 20
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.500 1.400
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90 .0 100.0 28 85 Core Power(% of Rated)
Power(% of Rated) Kp (TLO/SLO)
> 28.0 1.376 55.0 1.235
~ 85.0 1.187
> 85.0 1.065 100.0 1.000 FIGURE 3-38 Power-Dependent MCPR Limit Multiplier (Kp) versus Core Power (Main Turbine Pressure Regulator System in TLCO 3.3.13.c) 21
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1.80 1.75 1.75 1.70 1.70 1.65 1.65 E 1.60 1.60 .5
- J ...J 0::
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1.35 1.35 0.0 0.2 0.4 0.6 0.8 1.0 Rated OLMCP~TLO)
Exposure Range
't = 0.0 't = 1.0 BOC- MOC1 1.38 1.52 MOC1-EOC 1.42 1.56 FIGURE 3-4A-1 Rated-Power TLO MCPR Limits versus Average SCRAM Time 22
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1. 80 1.75 1.75 1.70 1.70 1.65 1.65
- '=
E 1.60
_.,. 1.60
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_,- ~~ BOC- MOC1 I 1.50 1.45 ~ ,_. ~ ~
1.45 1.40
~ 1.40 1.35 1.35 0.0 0. 2 0.4 0.6 0.8 1.0 Rated OLMCP~TLOl Exposure Range
't = 0.0 't = 1.0 BOC- MOC1 1.41 1.57 MOC1-EOC 1.45 1.61 FIGURE 3-4A-2 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable) 23
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2
- 1. 85 1. 85 1.80 1.80 1.75 1.75 1.70 1.70 1.65 1.65
~ .....
E 1.60
- .J 1.60
.§ 0::: 0:::
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- !!: 1.55 1.55 ::!!:
1.50 1.50 1.45 1.45 1.40 1.40 1.35 1.35
- 0. 0 0.2 0.4 0.6 0.8 1.0 Rated OLMCPRtTLo)
Exposure Range
't = 0.0 't;::: 1.0 BOC- MOC1 1.43 1.62 MOC1- MOC2 1.47 1.66 MOC2- EOC 1.53 1.72 FIGURE 3-4A-3 Rated-Power TLO MCPR Limits versus Average SCRAM Time (EOC-RPT System Inoperable) 24
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1.80 1.75 1.75 1.70 1.70 1.65 1.65
- '= :'=
E 1.60 1.60 E
- .:i :.:i D:: D::
a.. a..
l> l>
- !: 1. 55 1.55 ::!:
1.50 1.50 1.45 1.45 1.40 1.40 1.35 1.35 0.0 0.2 0.4 0.6 0.8 1.0
't Rated OLMCP~ 0 1 Exposure Range
't = 0.0 't = 1.0 BOC- MOC1 1.48 1.66 MOC1- MOC2 1.53 1.71 MOC2- EOC 1.57 1.75 FIGURE 3-4A-4 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable
& EOC-RPT System Inoperable) 25
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1. 80 1.75 1.75 1.70 1.70 1.65 1.65
~ ~
E 1.60 1.60 .5
- J ..J I
0:: 0::
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1.50 1. 50
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1.40 ~ 1.40 1.35 1.35 0.0 0.2 0.4 0.6 0.8 1.0 t
Rated OLMCPRtTLo)
Exposure Range
't = 0.0 't = 1.0 BOC- MOC1 1.40 1.54 MOC1-EOC 1.44 1.58 FIGURE 3-4A-5 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c) 26
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1.80 1.75 1.75 1.70 1.70 1.65 1.65
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E 1.60 I MOC1 - EOC ~
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~ - ~ 1.50 1.45
~
1.40 1.40 1.35 1.35 0.0 0.2 0.4 0.6 0.8 1.0
't Rated OLMCP~TLOI Exposure Range
't =0.0 't =1.0 BOC - MOC1 1.43 1.59 MOC1-EOC 1.47 1.63 FIGURE 3-4A-6 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c
& Main Turbine Bypass System Inoperable) 27
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2
- 1. 85 1.85 1.80 1.80 1.75 1.75 1.70 1.70 1.65 1.65
-~ -~
E 1.60
- 1.60 .§
_I a::
Q.
a::
Q.
u u
- a:
- a: 1.55 1.55 1.50 1.50 1.45 1.45 1.40 1.40 1.35 1.35 0.0 0. 2 0.4 0.6 0.8 1.0 t
Rated OLMCPRtTLoJ Exposure Range
't =0.0 't =1.0 BOC- MOC1 1.45 1.64 MOC1- MOC2 1.49 1.68 MOC2-EOC 1.55 1.74 FIGURE 3-4A-7 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c
& EOC-RPT System Inoperable) 28
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1.80 1.75 1. 75 1.70 1.70 1.65 1.65
- '=
E 1.60 1.6o .§
- J ...J a:: a::
ll. ll.
u 1.55 u
~ 1. 55 ~
1.50 1. 50 1.45 1.45 1.40 1.40 1.35 1. 35 0.0 0.2 0.4 0.6 0.8 1.0
't Rated OLMCPRtTLo)
Exposure Range
'T = 0.0 'T = 1.0 BOC- MOC1 1.50 1.68 MOC1- MOC2 1.55 1.73 MOC2- EOC 1.59 1.77 FIGURE 3-4A-8 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c
& Main Turbine Bypass System Inoperable
& EOC-RPT System Inoperable) 29
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1.80 1.75 1.75 1.70 1.70 1.65 1.65
~ ~
E 1.60 1.60 .§
- J I MOC1 -EOC ~ ..J 0:: 0::
a.. a..
()
- z 1.55 1.55 :z
()
_,.,..,. ~ ~
I"""""
I BOG- MOC1 1.50 1.50 1.45 ~ 1.45 1.40 1.40 1.35 1.35 0.0 0.2 0.4 0.6 0.8 1.0 Rated OLMCPRtsLOI Exposure Range
't = 0.0 't = 1.0 BOG- MOC1 1.45 1.56 MOC1- EOC 1.46 1.60 FIGURE 3-48-1 Rated-Power SLO MCPR Limits versus Average SCRAM Time 30
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2
- 1. 85 1.85 1.80 1.80 1.75 1.75 1.70 1.70 1.65 1.65 I MOC1
-EOC ~
~
E 1.60
..,.,.,. 1.60
~
E
- J ~ ~ :J a:: a::
Q.
u
- a: 1. 55 ~ J soc- MOC1 I 1.55 Q.
u
~ ~
1.50
~
,.,- ~ 1.50
~
1.45 1.45 1.40 1.40
- 1. 35 1.35 0.0 0.2 0.4 0.6 0.8 1.0 t
Rated OLMCP~sLOl Exposure Range
't =0.0 't = 1.0 SOC- MOC1 1.45 1.61 MOC1-EOC 1.49 1.65 FIGURE 3-48-2 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable) 31
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1.80 1.75 1.75 1.7 0 1.70 1.65 1.65
~ ~
E 1.60 1.60 E lk: lk:
Q. Q.
u 1.55 u
1.55 ::!!:
1.50 1.50 1.45 1.45 1.40 1.40 1.35 1.35 0.0 0.2 0.4 0.6 0.8 1. 0 Rated OLMCPRtsLOJ Exposure Range
't = 0.0 't = 1.0 BOC - MOC1 1.47 1.66 MOC1- MOC2 1.51 1.70 MOC2- EOC 1.57 1.76 FIGURE 3-48-3 Rated-Power SLO MCPR Limits versus Average SCRAM Time (EOC-RPT System Inoperable) 32
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1. 80 1.75 1.75 1.70 1.70 1.65 1.65
~ ...
E 1.60 1.60 .§
- J ...J 0:: 0::
- a. a.
(.) (.)
- !: 1.55 1.55 ::!:
1.50 1.50 1.45 1.45 1.40 1.40 1.35 1.35 0.0 0. 2 0.4 0.6 0.8 1.0
't Rated OLMCPRjsLo)
Exposure Range
't *= 0.0 't =1.0 BOC- MOC1 1.52 1.70 MOC1- MOC2 1.57 1.75 MOC2-EOC 1.61 1.79 FIGURE 3-48-4 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable
& EOC-RPT System Inoperable) 33
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1.80 1.75 1.75 1.70 1.70 1.65 1.65 E 1.60 I MOG1 -EOG ~ 1.60 .§
..,..,.,~
- i ...1 0:: 0::
Q. Q.
u
,...,- ...J u
- !!: 1. 55 BOG - MOG1 I 1.55 :!!:
1.50 ~ ~ 1.50
~
1.45 ~ 1.45 1.40 1.40
- 1. 35 1.35 0.0 0.2 0.4 0.6 0.8 1.0 Rated OLMCP~sLOJ Exposure Range
't =0.0 't =1.0 BOG- MOG1 1.45 1.58 MOG1-EOG 1.48 1.62 FIGURE 3-48-5 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c) 34
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1.80 1.75 1.75 1.70 1.70 1.65 I MOC1 - EOC ~ 1.65 E 1.60
- .:i 0:::
a.. ~~ ....-1.
- ~~
BOC- MOC1 I 1.60
~
.5
...J 0:::
a..
u
- !: 1. 55
~ u 1.55 ::!:
~
- 1. 50
~~ 1.50
~
1.45 1.45 1.40 1.40
- 1. 35 1.35 0.0 0. 2 0.4 0.6 0.8 1.0 Rated OLMCPRtsLOl Exposure Range
't = 0.0 't = 1.0 BOC - MOC1 1.47 1.63 MOC1- EOC 1.51 1.67 FIGURE 3-48-6 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c
& Main Turbine Bypass System Inoperable) 35
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1. 80 1.75 1.7 5 1.70 1.70 1.65 1.65 E 1.60 1.60 .5
- .J -I a::
a.
a::
a.
u u
- 1. 55 1.55
- :::;
1.50 1. 50 1.45 1.45 1.40 1.40 1.35 1.35 0.0 0.2 0.4 0.6 0.8 1.0
't Rated OLMCP~sLOJ Exposure Range
't = 0.0 't = 1.0 SOC - MOC1 1.49 1.68 MOC1- MOC2 1.53 1.72 MOC2- EOC 1.59 1.78 FIGURE 3-48-7 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c
& EOC-RPT System Inoperable) 36
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.85 1.85 1.80 1.80 1.75 1. 75 1.70 1.70 1.65 1.65
- '= :'=
E 1.60 1.6o .§
- J ...J IX: IX:
a.. a..
u u 1.55 :!:
- !: 1.55 1.50 1.50 1.45 1.45 1.40 1.40 1.35 1.35 0.0 0.2 0.4 0.6 0.8 1.0
't Rated OLMCP~sLO)
Exposure Range
't = 0.0 't = 1.0 SOC- MOC1 1.54 1.72 MOC1- MOC2 1.59 1.77 MOC2- EOC 1.63 1.81 FIGURE 3-48-8 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System in TLCO 3.3.13.c
& Main Turbine Bypass System Inoperable
& EOC-RPT System Inoperable) 37
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 4.0 LHGR OPERATING LIMITS (Technical Specification 3.2.3)
The LHGR operating limit for each licensed equipment in or out of service operating flexibility combination is independent of average scram time, and is a function of fuel bundle type, fuel rod type, core power, core flow, cycle exposure, and pellet exposure.
For both two loop operation (TLO) and single loop operation (SLO), the LHGR operating 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 4-1 multiplied by the smaller of either:
- a. The flow-dependent LHGR limit multiplier, LHGRFACF, as determined by Table 4-2,
- b. The power-dependent LHGR limit multiplier, LHGRFACp, as determined by Table 4-3.
Table 4-1 shows the exposure-dependent LHGR limits for all fuel types in the core , as a function of initial gadolinium concentration in a six inch segment of a fuel rod . Figures 4-3A and 4-38 show the LHGR limits for both U02 fuel segments and for fuel segments with the highest initial Gd (Gd203) concentrations .
These limits apply to operation with vessel dome pressure within +/- 10 psi of nominal pressure, as defined by the Region I pressure band shown in Figure 5-1. With all equipment in service or with the EOC-RPT system inoperable, operation with vessel dome pressure down to 40 psi below nominal is licensed provided the additional restrictions identified in Section 5.0 are applied with the LHGR operating limit defined in this section .
38
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 TABLE 4-1 Rated-Power LHGR Limits versus Peak Pellet Exposure
((
))
39
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 TABLE 4-2 Flow-Dependent LHGRFACF Limit Multiplier Operating Flexibility Options Equipment In/Out of Service Fuel Type Main Turbine EOC-RPT Main Turbine Hig_h Pressure Figure#
B~eass S~stem Svstem Pressure Reg_ulator Feedwater Heaters OQ.erable OQ.erable S~stem Status In Service TLCO 3.3.13.a or b Yes/No Yes Yes/No 4-1A TLCO 3.3.13.c Yes GNF2
& TLCO 3.3.13.a or b Yes/No GNF3 LTA No Yes/No 4-18 TLCO 3.3.13.c Yes Yes/No Yes/No TLCO 3.3.13.c No Not Licensed TLCO 3.3.13.a orb Yes/No 4-1C GNF3 Yes/No Yes/No TLCO 3.3.13.c Yes TLCO 3.3.13.c No Not Licensed TABLE 4-3 Power-Dependent LHGRFACp Limit Multiplier Operating Flexibility Options Equipment In/Out of Service Fuel Type Main Turbine EOC-RPT Main Turbine Hig_h Pressure Figure#
B~Q.ass S~stem S~stem Pressure Reg_ulator Feedwater Heaters 012,erable OQ.erable S~stem Status In Service TLCO 3.3.13.a, b, Yes 4-2A ore GNF2
& Yes/No Yes/No TLCO 3.3.13.a or b No 4-28 GNF3LTA TLCO 3.3.13.c No Not Licensed TLCO 3.3.13.a, b, Yes 4-2C or c GNF3 Yes/No Yes/No TLCO 3.3.13.a or b No 4-20 TLCO 3.3.13.c No Not Licensed 40
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 v
1.000
/
... 0.900 u
v
~
~ L_
/
- . 0.800 c.
'3
- !: 0.7 00 v
/
a::
~
...1 v
1:
Ql "0 0.600 c:
Ql c.
~
0 0.500 u::==
0.400 30.0 40.0 50.0 60 .0 70.0 80.0 90.0 100 .0 110 .0 Core Flow(% of Rated)
Flow (%of Rated) LHGRFACF (TLO/SLO) 30.0 0.557 50.0 0.795 80.0 0.998 90.0 1.000 110.0 1.000 FIGURE 4-1A GNF2 & GNF3 LTA Flow-Dependent LHGR Limit Multiplier (LHGRFACF) versus Core Flow 41
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.000
-;;: 0.900 u
v
./
v
/
~
(!)
J:
I
- !- 0.800
~
~
Q.
v E;j
- !! 0. 700 a::
~
...J c
v (1)
"0 0.600
~
r:::
(1)
~
Q.
~
~ 0.500 u::
0.400 30.0 40.0 50.0 60.0 70.0 80 .0 90 .0 100 .0 110 .0 Core Flow (%of Rated)
Flow (%of Rated) LHGRFACF (TLO/SLO) 30.0 0.527 50.0 0.625 60.0 0.792 90.0 0.993 100.0 1.000 110.0 1.000 FIGURE 4-18 GNF2 & GNF3 LTA Flow-Dependent LHGR Limit Multiplier (LHGRFACF) versus Core Flow (Main Turbine Bypass System Inoperable) 42
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 v
1.000
/
J 0.900 v
~
~
- . 0.800 v
/
,/
~
c.
/
~ 0.700
~
_J c
v Q)
"0 0.600 c:
Q) c.
~
~
0 0.500 u::
0.400 30.0 40.0 50.0 60.0 70 .0 80.0 90.0 100 .0 110 .0 Core Flow (%of Rated)
Flow (%of Rated) LHGRFACF (TLO/SLO) 30.0 0.572 40.0 0.683 60.0 0.863 80.0 0.998 90.0 1.000 110.0 1.000 FIGURE 4-1C GNF3 Flow-Dependent LHGR Limit Multiplier (LHGRFACF) versus Core Flow 43
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 I
I I
1.000
~
I I
./
I I
I J 0. 900 I
/
I I
I ioo""'"
~ I
-v I
I
~
...J I
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-;:::- 0.800 c.
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- s 0:: 0.700
,...~
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- a. I I
~ I
.!. I Q) I I
~ 0. 500 I ll.
~ I I BOG -EOC I I
I 0.400 30.0 40 .0 50.0 60.0 70.0 80.0 90. 0 100.0 24 28 Core Power(% of Rate d)
Power(% of Rated) LHGRFACp (TLO/SLO)"
24.0 0.460
- 5 28.0 0.470
> 28.0 0.624 45.0 0.713 60.0 0.740 85.0 0.922 100.0 1.000 FIGURE 4-2A GNF2 & GNF3 LTA Power-Dependent LHGR Limit Multiplier (LHGRFACp) versus Core Power 44
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1.000 J 0.900 J~
/ /
I EOR- EOC I
~
v
-v
(!)
- I:
/
/
_J
';::- 0.800
~
Q.
- 2
- s 0:: 0.700
/
~
_J
~ I BOC -EOR I cQ)
-g 0.600 Q)
Q. ~
~
Q)
~ 0.500 '
/:
ll.
0.400 '
BOC -EOC I 30.0 40.0 50.0 60. 0 70.0 80 .0 90. 0 100.0 24 28 Core Power("'oofRated)
BQC.-E.OB E.QB-E.OC.
Power (%of Rated) LHGRFACp (TLO/SLO) Power (%of Rated) LHGRFACp (TLO/SLO) 24.0 0.422 24.0 0.422
- s 28.0 0.463 :s 28.0 0.463
> 28.0 0.583 > 28.0 0.583 45.0 0.702 45.0 0.713 80.0 0.702 60.0 0.740 85.0 0.754 75.0 0.849 100.0 1.000 85.0 0.855 90.0 0.948 100.0 1.000 FIGURE 4-28 GNF2 & GNF3 LTA Power-Dependent LHGR Limit Multiplier (LHGRFACp) versus Core Power (High Pressure Feedwater Heaters Out of Service) 45
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 I
I I
1.000
~
I J 0.900 ~
~
(!)
- z::
~
...J
~ 0.800
~
~
Q. ~~
B
- l
_/
v 0:: 0. 700
/
!f...J c Q)
-g 0.600 Q)
Q. i" I
~
I I
Q) I I
~ 0. 500 I I
I I
~
BOC -EOC I
0.400 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 24 28 Core Power(% of Rated)
Power (%of Rated) LHGRFACp (TLO/SLO) 24.0 0.422
~ 28.0 0.463
> 28.0 0.583 45.0 0.713 100.0 1.000 FIGURE 4-2C GNF3 Power-Dependent LHGR Limit Multiplier (LHGRFACp) versus Core Power 46
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 r/
1.000 J
v J 0.900
/
I EOR- EOC J
~
v I i"'""""'
~
-1
';:'" 0. 800 ~ /
- c. ~~
- 2
- I
~
0:: 0.700
(!)
- I:
l J
~
-1 BOC -EOR c:
Q)
-g 0.600 Q)
- c. ~
I
~ I
.!. I Q) I I
~ 0. 500 I a..
0.400
~ I BOC -EOC I 30.0 40.0 50.0 60.0 70 .0 80.0 90.0 100.0 24 28 Core Power(% of Rated)
Power (%of Rated) LHGRFACp (TLO/SLO) Power (%of Rated) LHGRFACp (TLO/SLO) 24.0 0.422 24.0 0.422
- 28.0 0.463
- ::; 28.0 0.463
> 28.0 0.583 > 28.0 0.583 45.0 0.702 45.0 0.713 80.0 0.702 70.0 0.844 85.0 0.754 75.0 0.855 100.0 1.000 85.0 0.855 90.0 0.948 100.0 1.000 FIGURE 4-20 GNF3 Power-Dependent LHGR Limit Multiplier (LHGRFACp) versus Core Power (High Pressure Feedwater Heaters Out of Service) 47
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2
((
))
FIGURE 4-3A GNF2 & GNF3 LTA Rated-Power LHGR Limit versus Peak Pellet Exposure 48
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2
((
))
FIGURE 4-38 GNF3 Rated-Power LHGR Limit versus Peak Pellet Exposure 49
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 5.0 OPERATING PRESSURE LIMITS The operating limits presented within this report require that reactor dome pressure be maintained within the licensed pressure bands defined by Figure 5-1 . For operation in each of these regions, the following pressure dependent restrictions apply:
- a. For Region I operation:
The core operating limits from Sections 2.0 through 4.0 are applicable.
- b. For Region II and Region Ill operation :
- 1) The core operating limits from Sections 2.0 through 4 .0 are applicable
- 2) The MFLCPR and MFLPD thermal limit ratios must remain below the maximum values determined by Table 5-1 .
These restrictions are independent of core power, core flow, cycle exposure, feedwater temperature, the number of operating recirculation loops, and average scram time.
50
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 The MFLCPR and MFLPD thermal limit ratios are defined in terms of the core operating limits defined in Section 3.0 and Section 4.0.
The MFLCPR thermal limit ratio is the most limiting (maximum) value of the Fraction of Limiting Critical Power Ratio (FLCPR) in the core. The FLCPR is defined for each fuel assembly in the core as:
MCPRumit FLCPR = Fuel Assembly Minimum Critical Power Ratio where: MCPRumit = MCPR operating limit defined in Section 3.0 The MFLPD thermal limit ratio is the most limiting (maximum) value of the Fraction of Limiting Power Density (FLPD) in the core . The FLPD is defined for each six inch axial segment of each fuel rod in the core as:
Peak kW/ft power generated in a fuel rod segment FLPD =
LHGRumit where : LHGRumit = LHGR operating limit defined in Section 4.0 51
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 1080
- _1.9§9.
1058 1056 1045 1045 1040 1020 c;
'iii E:
~
(II 1000 (II
~
Q.
~
980 E
8 960 920 L-~1~--L---~-L~--~L-----~~--~~~--~------~--~~~~
20.0 I 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100 .0 24.0 Core Power(% of Rated)
P =A + 0.30
- CP + 0.0057
- CP 2
Dome Pre-ssure Curves Core Power A Nominal Dome Pressure (Pnoml 24 :S CPS 100 958 Region I Upper Boundary (Pnom+ 1o) 24 s CPs 100 968 Region I Lower Boundary (Pncm- 1o) 24 s CP :5100 948 Region II Lower Boundary (Pncm-20 ) 24 s CPs 100 938 Region Ill Lower Boundary (Pncm-40) 24 s CPs 100 918 CP =Percent of Rated Core Pov.er P = Reactor Dome Pressure (psig)
FIGURE 5-1 Licensed Regions of Operating Dome Pressure versus Core Power 52
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2 TABLE 5-1 Pressure Dependent Operating Flexibility Options Equipment In/Out of Service Main Turbine Main Turbine High Pressure Table#
EOC-RPT S~stem B~eass S~stem Pressure Regulator Feedwater Heaters Oeerable Oeerable S~stem Status In Service Yes Yes/No TLCO 3.3 .13.a orb Yes 5-2 No Yes/No TLCO 3.3.13.a orb Yes Reduced-Pressure Yes/No Yes/No TLCO 3.3.13.c Yes Flexibility Option Not Licensed Yes/No Yes/No TLCO 3.3.13.a orb No TABLE 5-2 MFLCPR and MFLPD Limits versus Operating Pressure Regions Max Allowable Thermal Limit Ratio Operating Pressure Region MFLCPR Limit MFLPDLimit I 1.000 1.000 II 0.949 0.940 Ill 0.927 0.830 53
Plant Hatch Core Operating Limits Report Unit 2 Cycle 26 Non-Proprietary Information Version 2
6.0 REFERENCES
- 1. Global Nuclear Fuel Document NEDE-24011-P-A-28, "General Electric Standard Application for Reactor Fuel (GESTAR //) ,"September 2019, and the US Supplement, NEDE-24011-P-A-28-US , September 2019.
- 2. Global Nuclear Fuel Document NEDC-33270P, "GNF2 Advantage Generic Compliance with NEOE-24011-P-A (GESTAR //),"Revision 9, December 2017 .
- 3. Global Nuclear Fuel Document NEDC-33879P, "GNF3 Generic Compliance with NEOE-24011 -P-A (GESTAR //),"Revision 2, March 2018 .
- 4. Southern Nuclear Operating Company Document NFD-H-18-343 "Hatch-2 Cycle 26 Reload Licensing Analysis Report," Version 2.0, December 2019.
- 5. Global Nuclear Fuel Document 004N5055, "Supplemental Reload Licensing Report for Hatch 2 Reload 25 Cycle 26," Revision 0, November 2018.
- 6. Global Nuclear Fuel Document 004N5056, "Fuel Bundle Information Report for Hatch 2 Reload 25 Cycle 26," Revision 0, November 2018.
54