NL-24-0061, Cycle 32 Core Operating Limits Report Version 1

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Cycle 32 Core Operating Limits Report Version 1
ML24061A173
Person / Time
Site: Hatch Southern Nuclear icon.png
Issue date: 03/01/2024
From: Coleman J
Southern Nuclear Operating Co
To:
Office of Nuclear Reactor Regulation, Document Control Desk
Shared Package
ML24061A171 List:
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NL-24-0061
Download: ML24061A173 (1)
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Text

Regulatory Affairs 3535 Colonnade Parkway Birmingham, AL 35243 205 992 5000 tel

Enclosure 1 to this letter contains Proprietary Information to be withheld from public disclosure per 10 CFR 2.390. When separated from Enclosure 1 this transmittal document is decontrolled.

March 1, 2024

Docket No.: 50-321 NL-24-0061

U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001

Edwin I. Hatch Nuclear Plant - Unit 1 Cycle 32 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 Limi ts Report (COLR), for Edwin I. Hatch Nuclear Plant (HNP) Unit 1 Cycle 32.

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 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 to this letter. The affidavit is also provided in to this letter and identifies that the designated information has been handled and classified as proprietary to GNF.

This letter contains no regulatory commitments. If you have any questions, please contact Ryan Joyce at 205.992.6468.

Respectfully submitted,

Jamie M. Coleman Regulatory Affairs Director JMC/agq/cbg

U. S. Nuclear Regulatory Commission NL-24-0061 Page 2 of 2

Enclosures:

1. HNP Unit 1 Cycle 32 Core Operating Limits Report Version 1 PROPRIETARY INFORMATION and Global Nuclear Fuel - Americas Affidavit
2. HNP Unit 1 Cycle 32 Core Operating Limits Report Version 1 NON-PROPRIETARY INFORMATION

Cc: NRC Regional Administrator, Region ll NRR Project Manager - Hatch Senior Resident Inspector - Hatch RTYPE: CHA02.004

Edwin I. Hatch Nuclear Plant - Unit 1 Cycle 32 Core Operating Limits Report Version 1

Enclosure 2 to NL-24-0061

HNP Unit 1 Cycle 32 Core Operating Limits Report Version 1 NON-PROPRIETARY INFORMATION

Non-Proprietary Information

SOUTHERN NUCLEAR OPERATING COMPANY EDWIN I. HATCH NUCLEAR PLANT

Unit 1 Cycle 32 CORE OPERATING LIMITS REPORT

Version 1

Originator: A. M. Phillippe [see proprietary version for signature]

Name Signature Date

Reviewer: R. D. Patrick [see proprietary version for signature]

Name Signature Date

Approval: R. J. Dunavant [see proprietary version for signature]

Name Signature Date

Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

TABLE OF CONTENTS

Section Title Page

1.0 Introduction 8

2.0 APLHGR Operating Limits 13

3.0 MCPR Operating Limits 15

4.0 LHGR Operating Limits 52

5.0 Operating Pressure Limits 59

6.0 References 63

2 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

TABLES

Table No. Title Page

1-1 System Operability Requirements 9

1-2 Equipment Requirements 10

1-3 Equipment Condition In/Out of Service Limitations 11

1-4 Exposure Definitions 12

3-1 Cycle Specific MCPR Safety Limit 18

3-2 Power-Dependent MCPR Limit (MCPRP) Operating Flexibility Options (for Core Power 28% of Rated) 18

3-3 Power-Dependent MCPR Limit Multiplier (K P) Operating Flexibility Options (for Core Power > 28% of Rated) 19

3-4 Rated-Power OLMCPR Operating Flexibility Options 20

4-1 Rated-Power LHGR Limits versus Peak Pellet Exposure 53

4-2 Power-Dependent LHGR Limit Multiplier (LHGRFAC P)

Operating Flexibility Options 54

5-1 Pressure-Dependent Operating Flexibility Options 62

5-2 MFLCPR and MFLPD Limits versus Operating Pressure Regions 62

3 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

FIGURES

Figure No. Title Page

2-1 APLHGR Limits versus Average Planar Exposure 14

3-1 Flow-Dependent MCPR Limit (MCPRF) versus Core Flow 21

3-2A Power-Dependent MCPR Limit (MCPRP) versus Core Power 22

3-2B Power-Dependent MCPR Limit (MCPRP) versus Core Power (Main Turbine Bypass System Inoperable) 23

3-3A Power-Dependent MCPR Limit Multiplier (K P) versus Core Power 24

3-3B Power-Dependent MCPR Limit Multiplier (K P) versus Core Power (Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service) 25

3-4A-1 Rated-Power TLO MCPR Limits versus Average SCRAM Time 26

3-4A-2 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable) 27

3-4A-3 Rated-Power TLO MCPR Limits versus Average SCRAM Time (EOC-RPT System Inoperable) 28

3-4A-4 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable &

EOC-RPT System Inoperable) 29

3-4A-5 Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service) 30

4 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

Figure No. Title Page

3-4A-6 Rated-Power TLO MCPR Limits versus Average SCRAM Time

([Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service] &

Main Turbine Bypass System Inoperable) 31

3-4A-7 Rated-Power TLO MCPR Limits versus Average SCRAM Time

([Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service] &

EOC-RPT System Inoperable) 32

3-4A-8 Rated-Power TLO MCPR Limits versus Average SCRAM Time

([Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service] &

Main Turbine Bypass System Inoperable &

EOC-RPT System Inoperable) 33

3-4A-9 Rated-Power TLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service) 34

3-4A-10 Rated-Power TLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service &

Main Turbine Bypass System Inoperable) 35

3-4A-11 Rated-Power TLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service & EOC-RPT System Inoperable) 36

3-4A-12 Rated-Power TLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service &

Main Turbine Bypass System Inoperable &

EOC-RPT System Inoperable) 37

3-4B-1 Rated-Power SLO MCPR Limits versus Average SCRAM Time 38

3-4B-2 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable) 39

3-4B-3 Rated-Power SLO MCPR Limits versus Average SCRAM Time (EOC-RPT System Inoperable) 40

5 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

Figure No. Title Page

3-4B-4 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable &

EOC-RPT System Inoperable) 41

3-4B-5 Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service) 42

3-4B-6 Rated-Power SLO MCPR Limits versus Average SCRAM Time

([Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service ] &

Main Turbine Bypass System Inoperable) 43

3-4B-7 Rated-Power SLO MCPR Limits versus Average SCRAM Time

([Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service ] &

EOC-RPT System Inoperable) 44

3-4B-8 Rated-Power SLO MCPR Limits versus Average SCRAM Time

([Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service ] &

Main Turbine Bypass System Inoperable &

EOC-RPT System Inoperable) 45

3-4B-9 Rated-Power SLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service) 46

3-4B-10 Rated-Power SLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service &

Main Turbine Bypass System Inoperable) 47

3-4B-11 Rated-Power SLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service & EOC-RPT System Inoperable) 48

3-4B-12 Rated-Power SLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service &

Main Turbine Bypass System Inoperable &

EOC-RPT System Inoperable) 49

6 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

Figure No. Title Page

3-5A High Worth Scram Rod Set - A1 Configuration 50

3-5B High Worth Scram Rod Set - A2 Configuration 51

4-1 Flow-Dependent LHGR Limit Multiplier (LHGRFACF) versus Core Flow 55

4-2A Power-Dependent LHGR Limit Multiplier (LHGRFAC P) versus Core Power 56

4-2B Power-Dependent LHGR Limit Multiplier (LHGRFAC P) versus Core Power (Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service) 57

4-3 Rated-Power LHGR Limit versus Peak Pellet Exposure 58

5-1 Licensed Regions of Operating Dome Pressure versus Core Power 61

7 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1.0 INTRODUCTION

The Core Operating Limits Report (COLR) for Plant Hatch Unit 1 Cycle 32 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 (Reference 1). This reload includes the GNF3 fuel type (Reference 2). Results from the associated reload analyses for the fuel in Unit 1 Cycle 32 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 (MCP R) - 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. Other equipment requirements which must be satisfied for operating limits included in this report to remain applicable are defined in Table 1-2.

Operating limit flexibility options are provided fo r various equipment in/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, status of the moisture separator reheaters, and configuration of High Worth Scram Rods (HWSRs ). Plant operational limitations associated with specific equipment in/out of service combinations are defined in Table 1-3.

Operating limits are presented in this report as a function of 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.

8 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

TABLE 1-1

System Operability Requirements

System Operability Requirement Main Turbine Bypass System Operable (Technical Specification 3.7.7) At least two bypass valves must be operable

9 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

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 The Oscillation Power Range Monitor (OPRM)

APRM System Period Based Detection Algorithm (PBDA) amplitude trip setpoint must be set equal to 1.15

An individual High Worth Scram Rod must satisfy the following conditions to be valid for thermal operating limit improvements:

Correspond to a licensed HWSR pattern, as defined in Figure 3-5.

Control rod is inserted to a licensed HWSR notch location, as defined in Figure 3-5.

All diagonal-adjacent and face-adjacent High Worth Scram Rod (HWSR) control rods are fully withdrawn as defined by the Figure 3-5 exclusion regions (Unless explicit analysis is performed by BWR Fuel Engineering to demonstrate thermal limit requirements can still be met)

Control rod scram time is within the scram time requirements specified in Section 3.2, in accordance with Technical Specification Table 3.1.4-1.

When operating above 65% core thermal power, if one or more 2nd stage Moisture Separator Moisture Separator Reheaters (MSRs) Reheater is removed from service or the steam flow path to one or more 2nd stage MSR is potentially reduced relative to normal operation, MSR out of service limits must be applied.

10 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

TABLE 1-3

Equipment Condition In/Out of Service Limitations

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 Status Dome pressure must be within +/- 10 psi of in TLCO 3.3.13.c nominal, as defined in Figure 5-1 OR Moisture Separator Reheaters Out of Service The core must be operating with a set of four (4) valid High Worth Scram Rods (as defined in Table 1-2)

High Worth Scram Rods In Service The Main Turbine Pressure Regulator System Status must be in TLCO 3.3.13.a or TLCO 3.3.13.b Moisture Separator Reheaters must be In Service

Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c High Worth Scram Rods In Service OR core operating limits are NOT applicable Moisture Separator Reheaters Out of Service

11 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

TABLE 1-4

Exposure Definitions

Exposure Label Definition Cycle Exposure

BOC Beginning of Cycle Exposure 0 MWd/ST

MOC1 First Middle of Cycle Exposure EOR - 5500 MWd/ST

MOC2 Second Middle of Cycle Exposure EOR - 4000 MWd/ST

Projected exposure at end of rated EOR End of Rated Exposure power with all control rods out, rated core flow, and rated feedwater temperature

EOC End of Cycle Exposure Exposure at cycle shutdown

12 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

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 assemb ly in the core is the APLHGR limit defined in Figure 2-1.

No flow dependent or power dependent APLHGR limit multipliers (MAPFAC F or MAPFACP) are required. For SLO, no unique limit on MAPFAC F or MAPFACP is required.

These limits apply to operation over the full range of licensed dome pressure regions shown in Figure 5-1.

13 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

15. 0
14. 0 Average AP L HGR Pla nar Lim it 13. 0 Ex p o s u r e (k W /ft)

(GW d/ST)

12. 0 0.00 14.36 21.22 13.01 11. 0 40.82 10.75 57.60 8.00 10. 0 63.50 6.00
9. 0
8. 0
7. 0
6. 0
5. 0
4. 0
0. 0 10. 0 20. 0 30. 0 40. 0 50. 0 60. 0 70. 0 Ave r ag e Plan ar Exp o s ure ( GWd /ST )

FIGURE 2-1

APLHGR Limits versus Average Planar Exposure

14 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

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 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, MCPR F, as determined by Figure 3-1,

OR

2) The power-dependent MCPR limit, MCPR P, as determined by Table 3-2.
b. For core power > 28%, the greater of either:
1) MCPRF, as determined by Figure 3-1,

OR

2) The product of the power-dependent MCPR limit multiplier (K P), as determined by Table 3-3, and the scram-time dependent rated-power OLMCPR, as determined by Table 3-4.

The scram-time dependent value of used to determine the rated-power OLMCPR is in accordancen 3.1. For High Worth Scram Rods In Service operation, Section 3.2 is also app

Limits for operation with High Worth Scram Rods In Service aation with four valid individua defined in th series. Individual creded HWSRs must meet the equipment requirements defined in Table 1-2 to be considere credit. During transition between the two HWSR in Figure 3-table to High Worth Scram Rods In Service, ws.

The limits prion aation with vessel dome pressure within nominal pressure, as defined by the Region I pressure band

, with the EOC-RPT Sywith High Worth Scram Rods In Service, me pressure down to 40 psi below itional restrictions identified in Sectioplied with the OLMCPR defined in

15 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

3.1 AVERAGE SCRAM TIME REQUIREMENTS

In the 3-4A and 3-4B figures, Option A scram time rated-power OLMCPRs correspond to

= 1.0, where 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 = 0.0. For scram times between Option A and Option B, the rated-power OLMCPR is linearly dependent on. If has not been determined, Option A limits must be used.

The average scram time of the control rods,, is defined as:

= 0, OR ave, whichever is greater. B A B

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

1 2

N B = 1.65**1 n

Ni i1

where: = 0.822 sec (mean scram time to notch 36 used in the transient analysis).

0.018 sec (standard deviation of ).

1N = total number of active rods measured in Technical Specifications Surveillance Requirement 3.1.4.1.

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

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

n Nii ave = i1 n

Ni i1 where: i = average scram time to notch 36 of all rods in the ith surveillance test.

16 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

3.2 HIGH WORTH SCRAM ROD SCRAM TIME REQUIREMENTS

For High Worth Scram Rods In Service operation, the value of used to determine the MCPR limit is the greater of either:

a. The average scram time of the control rods,, as defined in Section 3.1,

OR

b. The maximum of the individually calculated values of for the credited High Worth Scram Rods.

If individually calculated values of for all credited High Worth Scram Rods have not been determined, then non-HWSR limits must be used.

The value of for an individual High Worth Scram Rod is defined as:

= 0, OR HWSR - BA - B, whichever is greater.

where: A = as defined in Section 3.1.

B = as defined in Section 3.1.

HWSR = most recent measurement of the individual rod scram time from notch 48 to notch 36 (in seconds).

17 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

TABLE 3-1

Cycle Specific MCPR Safety Limit

Two Loop Operation Single Loop Operation

1.07 1.09

TABLE 3-2

Power-Dependent MCPR Limit (MCPRP) Operating Flexibility Options (for Core Power 28% of Rated)

Equipment In/Out of Service Figure #

Main Turbine Bypass System Operable

Yes 3-2A

No 3-2B

18 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

TABLE 3-3

Power-Dependent MCPR Limit Multiplier (K P) Operating Flexibility Options (for Core Power > 28% of Rated)

Equipment In/Out of Service

Main Turbine Pressure Regulator Moisture Separator Reheaters Figure #

System Status in TLCO 3.3.13.a or AND In Service TLCO 3.3.13.b

Yes 3-3A

No 3-3B

19 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

TABLE 3-4

Rated-Power OLMCPR Operating Flexibility Options

Equipment In/Out of Service Figure #

TLO SLO

Standard 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 System Inoperable AND Inoperable 3-4A-4 3-4B-4

Main Turbine Pressure Moisture Separator Regulator System Status AND/OR Reheaters Out of Service 3-4A-5 3-4B-5 in TLCO 3.3.13.c

Main Turbine Pressure Main Turbine Bypass Regulator System Status System Inoperable 3-4A-6 3-4B-6 in TLCO 3.3.13.c EOC-RPT System Inoperable 3-4A-7 3-4B-7 AND/OR AND Main Turbine Bypass System Inoperable Moisture Separator AND 3-4A-8 3-4B-8 Reheaters Out of Service EOC-RPT System Inoperable

High Worth Scram Rods In Service 3-4A-9 3-4B-9

Main Turbine Bypass System Inoperable 3-4A-10 3-4B-10

EOC-RPT System High Worth Scram Rods Inoperable 3-4A-11 3-4B-11 In Service AND Main Turbine Bypass System Inoperable AND 3-4A-12 3-4B-12 EOC-RPT System Inoperable

20 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 60

TLO

1. 50
1. 40
1. 30
1. 20
1. 10
30. 0 40. 0 50. 0 60. 0 70. 0 80. 0 90. 0 100.0 110.0 Cor e Flow (% of Rate d)

Flow (% of Ra te d) MCPRF (T L O)

30. 0 1. 52
85. 0 1. 20 110. 0 1. 20

MCPRF (S L O) = M CP RF (TLO) + 0. 03

FIGURE 3-1

Flow-Dependent MCPR Limit (MCPRF) versus Core Flow

21 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

2. 80

TLO

2. 70
2. 60
2. 50

Fl o w 60%

2. 40

Fl o w < 6 0 %

2. 30
24. 0 28. 0 Cor e Power (% of Rate d)

Flow (% of Ra te d) Pow e r (% of Ra te d) MCPRP (TLO)

60. 0 24. 0 2. 40
28. 0 2. 35

< 60. 0 24. 0 2. 35

28. 0 2. 35

MCPRP(S LO) = M CP RP(TL O) + 0. 03

FIGURE 3-2A

Power-Dependent MCPR Limit (MCPRP) versus Core Power

22 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

2. 80

TLO Fl o w 60%

2. 70
2. 60

Fl o w < 6 0 %

2. 50
2. 40
2. 30
24. 0 28. 0 Cor e Power (% of Rate d)

Flow (% of Ra te d) Pow e r (% of Ra te d) MCPRP (TLO)

60. 0 24. 0 2. 71
28. 0 2. 71

< 60. 0 24. 0 2. 64

28. 0 2. 45

MCPRP(S LO) = M CP RP(TL O) + 0. 03

FIGURE 3-2B

Power-Dependent MCPR Limit (MCPRP) versus Core Power (Main Turbine Bypass System Inoperable)

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1. 500
1. 400
1. 300
1. 200
1. 100
1. 000
30. 0 40. 0 50. 0 55 60. 0 70. 0 80. 0 90. 0 100. 0 28 Cor e Power (% of Rate d)

P ow e r (% of Ra te d) KP (TLO/SLO)

> 28. 0 1. 386

40. 0 1. 289
55. 0 1. 236

> 55. 0 1. 150

60. 0 1. 150 100. 0 1. 000

FIGURE 3-3A

Power-Dependent MCPR Limit Multiplier (K P) versus Core Power

24 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 500
1. 400
1. 300
1. 200
1. 100
1. 000
30. 0 40. 0 50. 0 60. 0 70. 0 80. 090. 0 100. 0 28 Cor e Power (% of Rate d) 85

P ow e r (% of Ra te d) KP (TLO/SLO)

> 28. 0 1. 413

45. 0 1. 285
60. 0 1. 285
85. 0 1. 196

> 85. 0 1. 085 100. 0 1. 000

FIGURE 3-3B

Power-Dependent MCPR Limit Multiplier (K P) versus Core Power (Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service)

25 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(TL O)

= 0.0 = 1.0 BOC - MOC1 1. 31 1. 41 M OC1 - M OC2 1. 31 1. 45 MOC2 - EOC 1. 32 1. 46

FIGURE 3-4A-1

Rated-Power TLO MCPR Limits versus Average SCRAM Time

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1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(TL O)

= 0.0 = 1.0 BOC - MOC1 1. 36 1. 47 M OC1 - M OC2 1. 34 1. 50 MOC2 - EOC 1. 35 1. 51

FIGURE 3-4A-2

Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable)

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1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(TL O)

= 0.0 = 1.0 BOC - MOC1 1. 31 1. 49 M OC1 - M OC2 1. 32 1. 51 MOC2 - EOC 1. 33 1. 52

FIGURE 3-4A-3

Rated-Power TLO MCPR Limits versus Average SCRAM Time (EOC-RPT System Inoperable)

28 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(TL O)

= 0.0 = 1.0 BOC - MOC1 1. 36 1. 52 M OC1 - M OC2 1. 36 1. 54 MOC2 - EOC 1. 39 1. 57

FIGURE 3-4A-4

Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable

& EOC-RPT System Inoperable)

29 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(TL O)

= 0.0 = 1.0 BOC - MOC1 1. 31 1. 44 M OC1 - M OC2 1. 33 1. 47 MOC2 - EOC 1. 34 1. 48

FIGURE 3-4A-5

Rated-Power TLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service)

30 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(TL O)

= 0.0 = 1.0 BOC - MOC1 1. 36 1. 49 M OC1 - M OC2 1. 36 1. 52 MOC2 - EOC 1. 37 1. 53

FIGURE 3-4A-6

Rated-Power TLO MCPR Limits versus Average SCRAM Time

([Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service]

& Main Turbine Bypass System Inoperable)

31 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(TL O)

= 0.0 = 1.0 BOC - MOC1 1. 32 1. 51 M OC1 - M OC2 1. 35 1. 54 MOC2 - EOC 1. 36 1. 55

FIGURE 3-4A-7

Rated-Power TLO MCPR Limits versus Average SCRAM Time

([Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service]

& EOC-RPT System Inoperable)

32 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(TL O)

= 0.0 = 1.0 BOC - MOC1 1. 37 1. 55 M OC1 - M OC2 1. 39 1. 57 MOC2 - EOC 1. 41 1. 59

FIGURE 3-4A-8

Rated-Power TLO MCPR Limits versus Average SCRAM Time

([Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service]

& Main Turbine Bypass System Inoperable

& EOC-RPT System Inoperable)

33 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 1. 65

MOC1 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(TL O)

= 0.0 = 1.0 BOC - MOC1 1. 31 1. 43 MOC1 - EOC 1. 29 1. 43

FIGURE 3-4A-9

Rated-Power TLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service)

34 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 1. 65

MOC1 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(TL O)

= 0.0 = 1.0 BOC - MOC1 1. 36 1. 48 MOC1 - EOC 1. 32 1. 48

FIGURE 3-4A-10

Rated-Power TLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service

& Main Turbine Bypass System Inoperable)

35 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 1. 65

MOC1 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(TL O)

= 0.0 = 1.0 BOC - MOC1 1. 31 1. 49 MOC1 - EOC 1. 30 1. 49

FIGURE 3-4A-11

Rated-Power TLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service

& EOC-RPT System Inoperable)

36 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 1. 65

MOC1 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(TL O)

= 0.0 = 1.0 BOC - MOC1 1. 36 1. 54 MOC1 - EOC 1. 34 1. 54

FIGURE 3-4A-12

Rated-Power TLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service

& Main Turbine Bypass System Inoperable

& EOC-RPT System Inoperable)

37 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(SL O)

= 0.0 = 1.0 BOC - MOC1 1. 41 1. 44 M OC1 - M OC2 1. 41 1. 48 MOC2 - EOC 1. 41 1. 49

FIGURE 3-4B-1

Rated-Power SLO MCPR Limits versus Average SCRAM Time

38 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(SL O)

= 0.0 = 1.0 BOC - MOC1 1. 41 1. 50 M OC1 - M OC2 1. 41 1. 53 MOC2 - EOC 1. 41 1. 54

FIGURE 3-4B-2

Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable)

39 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(SL O)

= 0.0 = 1.0 BOC - MOC1 1. 41 1. 52 M OC1 - M OC2 1. 41 1. 54 MOC2 - EOC 1. 41 1. 55

FIGURE 3-4B-3

Rated-Power SLO MCPR Limits versus Average SCRAM Time (EOC-RPT System Inoperable)

40 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(SL O)

= 0.0 = 1.0 BOC - MOC1 1. 41 1. 55 M OC1 - M OC2 1. 41 1. 57 MOC2 - EOC 1. 42 1. 60

FIGURE 3-4B-4

Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Bypass System Inoperable

& EOC-RPT System Inoperable)

41 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(SL O)

= 0.0 = 1.0 BOC - MOC1 1. 41 1. 47 M OC1 - M OC2 1. 41 1. 50 MOC2 - EOC 1. 41 1. 51

FIGURE 3-4B-5

Rated-Power SLO MCPR Limits versus Average SCRAM Time (Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service)

42 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(SL O)

= 0.0 = 1.0 BOC - MOC1 1. 41 1. 52 M OC1 - M OC2 1. 41 1. 55 MOC2 - EOC 1. 41 1. 56

FIGURE 3-4B-6

Rated-Power SLO MCPR Limits versus Average SCRAM Time

([Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service]

& Main Turbine Bypass System Inoperable)

43 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(SL O)

= 0.0 = 1.0 BOC - MOC1 1. 41 1. 54 M OC1 - M OC2 1. 41 1. 57 MOC2 - EOC 1. 41 1. 58

FIGURE 3-4B-7

Rated-Power SLO MCPR Limits versus Average SCRAM Time

([Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service]

& EOC-RPT System Inoperable)

44 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70

BOC - MO C1

1. 65 MOC1 - MOC2 1. 65

MOC2 - EO C

1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(SL O)

= 0.0 = 1.0 BOC - MOC1 1. 41 1. 58 M OC1 - M OC2 1. 42 1. 60 MOC2 - EOC 1. 44 1. 62

FIGURE 3-4B-8

Rated-Power SLO MCPR Limits versus Average SCRAM Time

([Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service]

& Main Turbine Bypass System Inoperable

& EOC-RPT System Inoperable)

45 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70
1. 65 1. 65
1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(SL O)

= 0.0 = 1.0 BOC - EOC 1. 41 1. 46

FIGURE 3-4B-9

Rated-Power SLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service)

46 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70
1. 65 1. 65
1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(SL O)

= 0.0 = 1.0 BOC - EOC 1. 41 1. 51

FIGURE 3-4B-10

Rated-Power SLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service

& Main Turbine Bypass System Inoperable)

47 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70
1. 65 1. 65
1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(SL O)

= 0.0 = 1.0 BOC - EOC 1. 41 1. 52

FIGURE 3-4B-11

Rated-Power SLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service

& EOC-RPT System Inoperable)

48 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 70 1. 70
1. 65 1. 65
1. 60 1. 60
1. 55 1. 55
1. 50 1. 50
1. 45 1. 45
1. 40 1. 40
1. 35 1. 35
1. 30 1. 30
1. 25 1. 25
0. 0 0. 2 0. 4 0. 6 0. 8 1. 0

Ex posure Ra nge Ra te d OL M CP R(SL O)

= 0.0 = 1.0 BOC - EOC 1. 41 1. 57

FIGURE 3-4B-12

Rated-Power SLO MCPR Limits versus Average SCRAM Time (High Worth Scram Rods In Service

& Main Turbine Bypass System Inoperable

& EOC-RPT System Inoperable)

49 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

02 06 10 14 18 22 26 30 34 38 42 46 50 Not c h 51 5100In s e r t e d 47 4702 04 43 4306 39 ++ 39 08 10 35 3512 14 31 3116 27 2718 20 23 2322 19 1924 26 15 ++ 15 28 11 1130 32 Lic ens ed 07 0734HW S R 36 Dept hs 03 0338 02 06 10 14 18 22 26 30 34 38 42 46 50 40 42 44 Lic ens ed High W ort h S c ram Rod: + 46 48 W it hdrawn High W ort h S c ram Rod E x c lus ion Region: Not c h

Lice nse d HW SR Coordina te s (IX-JY) 14-15 14-39 38-15 38-39

Ma x imum High W orth Scra m Rod De pth (Notch): 32 Minimum High W orth Scra m Rod De pth (Notch): 36

FIGURE 3-5A

High Worth Scram Rod Set - A1 Configuration

50 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

02 06 10 14 18 22 26 30 34 38 42 46 50 Not c h 51 5100In s e r t e d 47 4702 04 43 + 4306 39 3908 10 35 3512 14 31 3116 27 ++ 27 18 20 23 2322 19 1924 26 15 1528 11 + 1130 32 Lic ens ed 07 0734HW S R 36 Dept hs 03 0338 02 06 10 14 18 22 26 30 34 38 42 46 50 40 42 44 Lic ens ed High W ort h S c ram Rod: + 46 48 W it hdrawn High W ort h S c ram Rod E x c lus ion Region: Not c h

Lice nse d HW SR Coordina te s (IX-JY) 10-27 26-11 26-43 42-27

Ma x imum High W orth Scra m Rod De pth (Notch): 32 Minimum High W orth Scra m Rod De pth (Notch): 36

FIGURE 3-5B

High Worth Scram Rod Set - A2 Configuration

51 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

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 rod type, core power, core flow, 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, LHGRFAC F, shown in Figure 4-1,

OR

b. The power-dependent LHGR limit multiplier, LHGRFAC P, as determined by Table 4-2.

Table 4-1 shows the exposure-dependent LHGR limits as a function of initial gadolinia concentration in a six inch segment of a fuel rod. Figure 4-3 shows the LHGR limits for both UO2 fuel segments and for fuel segments with the highest initial Gd (Gd 2O3) 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 Standard Equipment In Service, with the EOC-RPT System Inoperable, and/ or with High Worth Scram Rods In Service, 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.

52 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

TABLE 4-1

Rated-Power LHGR Limits versus Peak Pellet Exposure

((

))

53 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

TABLE 4-2

Power-Dependent LHGR Limit Multiplier (LHGRFAC P) Operating Flexibility Options

Equipment In/Out of Service

Main Turbine Pressure Regulator Moisture Separator Figure #

System Status AND Reheaters in TLCO 3.3.13.a or TLCO 3.3.13.b In Service

Yes 4-2A

No 4-2B

54 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 000
0. 900
0. 800
0. 700
0. 600
0. 500
0. 400
30. 0 40. 0 50. 0 60. 0 70. 0 80. 0 90. 0 100.0 110.0 Cor e Flow (% of Rate d)

Flow (% of Ra te d) LHGRFACF (TLO/SLO)

30. 0 0. 572
40. 0 0. 683
50. 0 0. 772
60. 0 0. 863
70. 0 0. 930
80. 0 0. 998
90. 0 1. 000 110. 0 1. 000

FIGURE 4-1

Flow-Dependent LHGR Limit Multiplier (LHGRFAC F) versus Core Flow

55 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 000
0. 900
0. 800
0. 700
0. 600
0. 500
0. 400
30. 0 40. 0 50. 0 60. 0 70. 0 80. 0 90. 0 100. 0 24 28 Cor e Power (% of Rate d)

P ow e r (% of Ra te d ) LHGRFACP (TLO/SLO)

24. 0 0. 480
28. 0 0. 510

> 28. 0 0. 623 100. 0 1. 000

FIGURE 4-2A

Power-Dependent LHGR Limit Multiplier (LHGRFAC P) versus Core Power

56 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

1. 000
0. 900
0. 800
0. 700
0. 600
0. 500
0. 400
30. 0 40. 0 50. 0 60. 0 70. 0 80. 0 90. 0 100. 0 24 28 Cor e Power (% of Rate d)

P ow e r (% of Ra te d ) LHGRFACP (TLO/SLO)

24. 0 0. 415
28. 0 0. 445

> 28. 0 0. 583

45. 0 0. 712 100. 0 1. 000

FIGURE 4-2B

Power-Dependent LHGR Limit Multiplier (LHGRFAC P) versus Core Power (Main Turbine Pressure Regulator System Status in TLCO 3.3.13.c AND/OR Moisture Separator Reheaters Out of Service)

57 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

((

))

FIGURE 4-3

Rated-Power LHGR Limit versus Peak Pellet Exposure

58 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

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 III operation:
1) The core operating limits from Sections 2.0 through 4.0 are applicable

AND

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.

The pressure-dependent MFLPD and MFLCPR limits defined in this section constitute redefinitions of the conditions for entry into Technical Specifications Required Action Statements 3.2.2 and 3.2.3. Thus, any additional applicable administrative limits beyond those discussed in this section must be applied in combination (via multiplication) to maintain margin to the COLR-based thermal limit ratio limits instead of margin to MFLCPR and/or MFLPD thermal limit ratio values of 1.000.

59 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

5.1 THERMAL LIMIT RATIO DEFINITIONS

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 limiti ng (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:

Fuel Assembly Critical Power Ratio FLCPR = MCPRLimit

where: MCPRLimit = MCPR operating limit defined in Section 3.0

The MFLPD thermal limit ratio is the most limiti ng (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:

FLPD = Peak kW/ft power generated in a fuel rod segment LHGRLimit

where: LHGRLimit = LHGR operating limit defined in Section 4.0

60 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

FIGURE 5-1

Licensed Regions of Operating Dome Pressure versus Core Power

61 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

TABLE 5-1

Pressure-Dependent Operating Flexibility Options

Equipment In/Out of Service Main Turbine Main Turbine Pressure Moisture Separator Table #

Bypass System Regulator System Status AND Reheaters Operable in TLCO 3.3.13.a or In Service in TLCO 3.3.13.b

Yes Yes 5-2

Reduced-Pressure Flexibility Option is Not Licensed if either of the two categories in this Table are answered NO. Not Licensed

TABLE 5-2

MFLCPR and MFLPD Limits versus Operating Pressure Regions

Operating Pressure Region Maximum Allowable Thermal Limit Ratio

MFLCPR Limit MFLPD Limit I 1.000 1.000 II 0.980 1.000 III 0.950 1.000

62 Plant Hatch Core Operating Limits Report Unit 1 Cycle 32 Non-Proprietary Information Version 1

6.0 REFERENCES

1. Global Nuclear Fuel Report NEDE-24011-P-A-31, " General Electric Standard Application for Reactor Fuel (GESTAR II)," November 2020, and the US Supplement, NEDE-24011-P-A-31-US, November 2020.
2. Global Nuclear Fuel Report NEDC-33879P, " GNF3 Generic Compliance with NEDE-24011-P-A (GESTAR II)," Revision 4, August 2020.
3. Southern Nuclear Operating Company Report NFD-H-23-239, " Hatch-1 Cycle 32 Reload Licensing Analysis Report," Version 1, November 2023.
4. Global Nuclear Fuel Report 007N0468, "Supplemental Reload Licensing Report for Hatch 1 Reload 31 Cycle 32," Revision 0, November 2023.
5. Global Nuclear Fuel Report 007N0469, "Fuel Bundle Information Report for Hatch 1 Reload 31 Cycle 32," Revision 0, November 2023.

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