PLA-7689, Submittal of Cycle 21 Core Operating Limits Report

Submittal of Cycle 21 Core Operating Limits Report

ML18101A162
Person / Time
Site:	Susquehanna
Issue date:	04/11/2018
From:	Berryman B Susquehanna
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
PLA-7689
Download: ML18101A162 (64)

Text

Brad Berryman Susquehanna Nuclear, LLC Site Vice President 769 Salem Boulevard Berwick, PA 18603 TALEN~

Tel. 570.542.2904 Fax 570.542.1504 Brad.Berryman@TalenEnergy.com ENERGY U.S. Nuclear Regulatory Commission 10 CFR50.4 Attn: Document Control Desk Washington, DC 20555-0001 SUSQUEHANNA STEAM ELECTRIC STATION APR 1 1 2018 SUBMITTAL OF UNIT 1 CYCLE 21 CORE OPERATING LIMITS REPORT (COLR)

PLA-7689 Docket No. 50-387 Technical Specification Section 5.6.5 requires that the Core Operating Limits Report (COLR), including any mid-cycle supplements or revisions, be provided upon issuance to the Nuclear Regulatory Commission in accordance with 10 CFR 50.4. In compliance with this requirement, the Unit 1 Cycle 21 COLR is provided in the attachment.

There are no new or revised regulatory commitments contained in this submittal.

If you have any questions regarding this report, please contact Mr. Jason Jennings, Manager- Nuclear Regulatory Affairs, at (570) 542-3155.

Brad Berryman

Attachment:

Unit 1 Cycle 21 COLR Copy: NRC Region I Ms. T. E. Hood, NRC Project Manager Ms. L. H. Micewski, NRC Sr. Resident Inspector Mr. M. Shields, PA DEP/BRP

Attachment to PLA-7689 Unit 1 Cycle 21 COLR

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Rev. 18 PL-NF-18-003 Rev. 0 Page 6 of 62

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3.1 References Technical Specification 3.1.1 3.2 Description The SHUTDOWN MARGIN shall be equal to or greater than:

a) 0.38% 'k/k with the highest worth rod analytically determined OR b) 0.28% 'k/k with the highest worth rod determined by test Since core reactivity will vary during the cycle as a function of fuel depletion and poison burnup, Beginning of Cycle (BOC) SHUTDOWN MARGIN (SDM) tests must also account for changes in core reactivity during the cycle. Therefore, the SDM measured at BOC must be equal to or greater than the applicable requirement from either 3.2.a or 3.2.b plus an adder, R. The adder, R, is the difference between the calculated value of maximum core reactivity (that is, minimum SDM) during the operating cycle and the calculated BOC core reactivity. If the value of R is zero (that is, BOC is the most reactive point in the cycle) no correction to the BOC measured value is required.

The SHUTDOWN MARGIN limits provided in 3.2a and 3.2b are applicable in MODES 1, 2, 3, 4, and 5. This includes core shuffling.

















SUSQUEHANNA UNIT 1 TRM/3.2-7 EFFECTIVE DATE 04/11/2018

Rev. 18 PL-NF-18-003 Rev. 0 Page 7 of 62 4.0 AVERAGE PLANAR LINEAR HEAT GENERATION RATE (APLHGR) 4.1 References Technical Specification 3.2.1 4.2 Description The APLHGRs for ATRIUMTM-10 fuel shall not exceed the limit shown in Figure 4.2-1.

The APLHGR limits in Figure 4.2-1 are valid in Two Loop Operation for Main Turbine Bypass Operable and Inoperable, EOC-RPT Operable and Inoperable, Backup Pressure Regulator Operable and Inoperable, and with one Turbine Stop Valve (TSV) or Turbine Control Valve (TCV) closed. The APLHGR limits for Single Loop operation are provided in Section 8.0.

SUSQUEHANNA UNIT 1 TRM/3.2-8 EFFECTIVE DATE 04/11/2018

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5.1 References Technical Specification 3.2.2, 3.3.4.1, 3.7.6, and 3.7.8 Technical Requirements Manual 3.3.7 5.2 Description The MCPR limit is specified as a function of core power, core flow, average scram insertion time per Section 5.3 and plant equipment operability status. The MCPR limits for all fuel types (ATRIUMTM-10) shall be the greater of the Flow-Dependent or the Power-Dependent MCPR, depending on the applicable equipment operability status.

a) Main Turbine Bypass / EOC-RPT / Backup Pressure Regulator Operable Figure 5.2-1: Flow-Dependent MCPR value determined from BOC to EOC Figure 5.2-2: Power-Dependent MCPR value determined from BOC to EOC b) Main Turbine Bypass Inoperable Figure 5.2-3: Flow-Dependent MCPR value determined from BOC to EOC Figure 5.2-4: Power-Dependent MCPR value determined from BOC to EOC c) EOC-RPT Inoperable Figure 5.2-5: Flow-Dependent MCPR value determined from BOC to EOC Figure 5.2-6: Power-Dependent MCPR value determined from BOC to EOC d) Backup Pressure Regulator Inoperable Figure 5.2-7: Flow-Dependent MCPR value determined from BOC to EOC Figure 5.2-8: Power Dependent MCPR value determined from BOC to EOC e) One Turbine Stop Valve (TSV) or Turbine Control Valve (TCV) Closed Figure 5.2-9: Flow-Dependent MCPR value determined from BOC to EOC Figure 5.2-10:Power-Dependent MCPR value determined from BOC to EOC The MCPR limits in Figures 5.2-1 through 5.2-10 are valid for Two Loop operation.

The MCPR limits for Single Loop operation are provided in Section 8.0.

SUSQUEHANNA UNIT 1 TRM/3.2-10 EFFECTIVE DATE 04/11/2018

Rev. 18 PL-NF-18-003 Rev. 0 Page 10 of 62 5.3 Average Scram Time Fraction If the average measured scram times are greater than the Realistic Scram times listed in Table 5.3-1 then the MCPR operating limits corresponding to the Maximum Allowable Average Scram Insertion Time must be implemented. Determining MCPR operating limits based on interpolation between scram insertion times is not permitted. The evaluation of scram insertion time data, as it relates to the attached table should be performed per Reactor Engineering procedures.

SUSQUEHANNA UNIT 1 TRM/3.2-11 EFFECTIVE DATE 04/11/2018

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Rev. 18 PL-NF-18-003 Rev. 0 Page 27 of 62 6.0 LINEAR HEAT GENERATION RATE (LHGR) 6.1 References Technical Specification 3.2.3, 3.3.4.1, 3.7.6, and 3.7.8 Technical Requirements Manual 3.3.7 6.2 Description The maximum LHGR for ATRIUM'-10 fuel shall not exceed the LHGR limit determined from Figure 6.2-1. The LHGR limit in Figure 6.2-1 is valid for Main Turbine Bypass Operable and Inoperable, EOC-RPT Operable and Inoperable, Backup Pressure Regulator Operable and Inoperable, and with one Turbine Stop Valve (TSV) or Turbine Control Valve (TCV) closed.

To protect against both fuel centerline melting and cladding strain during anticipated system transients initiated from reduced power and flow conditions, power and flow dependent LHGR limit multipliers are provided in the following figures:

a) Main Turbine Bypass / EOC-RPT / Backup Pressure Regulator Operable Figure 6.2-2: Flow-Dependent LHGR Limit Multiplier Figure 6.2-3: Power-Dependent LHGR Limit Multiplier b) Main Turbine Bypass or EOC-RPT or Backup Pressure Regulator Inoperable Figure 6.2-4: Flow-Dependent LHGR Limit Multiplier Figure 6.2-5: Power-Dependent LHGR Limit Multiplier c) One Turbine Stop Valve (TSV) or Turbine Control Valve (TCV) Closed Figure 6.2-6: Flow-Dependent LHGR Limit Multiplier Figure 6.2-7: Power-Dependent LHGR Limit Multiplier The LHGR limits and LHGR limit multipliers in Figures 6.2-1 through 6.2-7 are valid for both Two Loop and Single Loop operation.

SUSQUEHANNA UNIT 1 TRM/3.2-28 EFFECTIVE DATE 04/11/2018

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7.1 References Technical Specification 3.3.2.1 7.2 Description The RBM Allowable Value and Trip Setpoints for; a) Low Power Range Setpoint, b) Intermediate Power Range Setpoint, c) High Power Range Setpoint, d) Low Power Range - Upscale, e) Intermediate Power Range - Upscale, and f) High Power Range - Upscale shall be established as specified in Table 7.2-1. The RBM setpoints are valid for Two Loop and Single Loop Operation, Main Turbine Bypass Operable and Inoperable, EOC-RPT Operable and Inoperable, Backup Pressure Regulator Operable and Inoperable, and with one Turbine Stop Valve (TSV) or Turbine Control Valve (TCV) closed.

The RBM system design objective is to block erroneous control rod withdrawal initiated by the operator before fuel design limits are violated. If the full withdrawal of any control rod would not violate a fuel design limit, then the RBM system is not required to be operable. Table 7.2-2 provides RBM system operability requirements to ensure that fuel design limits are not violated.

SUSQUEHANNA UNIT 1 TRM/3.2-39 EFFECTIVE DATE 04/11/2018

Rev. 18 PL-NF-18-003 Rev. 0 Page 39 of 62 Table 7.2-1 RBM Setpoints Allowable Nominal Trip Function Value(1) Setpoint Low Power Range Setpoint 28.0 24.9 Intermediate Power Range Setpoint 63.0 61.0 High Power Range Setpoint 83.0 81.0 Low Power Range - Upscale 123.4 123.0 Intermediate Power Range - Upscale 117.4 117.0 High Power Range - Upscale 105.6 105.2 (1) Power setpoint function (Low, Intermediate, and High Power Range Setpoints) determined in percent of RATED THERMAL POWER. Upscale trip setpoint function (Low, Intermediate, and High Power Range - Upscale) determined in percent of reference level.

Table 7.2-2 RBM System Operability Requirements Thermal Power MCPR (2,3)

(% of Rated) 28 and < 90 < 1.76 90 and < 95 < 1.47

> 95 < 1.68 (2) Applicable to Main Turbine Bypass Operable and Inoperable, EOC-RPT Operable and Inoperable, Backup Pressure Regulator Operable and Inoperable, and with one Turbine Stop Valve (TSV) or Turbine Control Valve (TCV) closed.

(3) Applicable to both Two Loop and Single Loop Operation.

SUSQUEHANNA UNIT 1 TRM/3.2-40 EFFECTIVE DATE 04/11/2018

Rev. 18 PL-NF-18-003 Rev. 0 Page 40 of 62 8.0 RECIRCULATION LOOPS - SINGLE LOOP OPERATION 8.1 References Technical Specification 3.2.1, 3.2.2, 3.3.4.1, 3.4.1, 3.7.6, and 3.7.8 Technical Requirements Manual 3.3.7 8.2 Description APLHGR The APLHGR limit for ATRIUMTM-10 fuel shall be equal to the APLHGR Limit from Figure 8.2-1.

The APLHGR limits in Figure 8.2-1 are valid in Single Loop Operation for Main Turbine Bypass Operable and Inoperable, EOC-RPT Operable and Inoperable, Backup Pressure Regulator Operable and Inoperable, and with one Turbine Stop Valve (TSV) or Turbine Control Valve (TCV) closed.

Minimum Critical Power Ratio Limit The MCPR limit is specified as a function of core power, core flow, and plant equipment operability status. The MCPR limits for all fuel types (ATRIUMTM-10) shall be the greater of the Flow-Dependent or the Power-Dependent MCPR, depending on the applicable equipment operability status.

a) Main Turbine Bypass / EOC-RPT / Backup Pressure Regulator Operable Figure 8.2-2: Flow-Dependent MCPR value determined from BOC to EOC Figure 8.2-3: Power-Dependent MCPR value determined from BOC to EOC b) Main Turbine Bypass Inoperable Figure 8.2-4: Flow-Dependent MCPR value determined from BOC to EOC Figure 8.2-5: Power-Dependent MCPR value determined from BOC to EOC c) EOC-RPT Inoperable Figure 8.2-6: Flow-Dependent MCPR value determined from BOC to EOC Figure 8.2-7: Power-Dependent MCPR value determined from BOC to EOC d) Backup Pressure Regulator Inoperable Figure 8.2-8: Flow-Dependent MCPR value determined from BOC to EOC Figure 8.2-9: Power-Dependent MCPR value determined from BOC to EOC SUSQUEHANNA UNIT 1 TRM/3.2-41 EFFECTIVE DATE 04/11/2018

Rev. 18 PL-NF-18-003 Rev. 0 Page 41 of 62 e) One Turbine Stop Valve (TSV) or Turbine Control Valve (TCV) Closed Figure 8.2-10:Flow-Dependent MCPR value determined from BOC to EOC Figure 8.2-11:Power-Dependent MCPR value determined from BOC to EOC The MCPR limits in Figures 8.2-2 through 8.2-11 are valid only for Single Loop operation.

Linear Heat Generation Rate Limit The LHGR limits for Single Loop Operation are defined in Section 6.0.



RBM Setpoints and Operability Requirements The RBM setpoints and operability requirements for Single Loop Operation are defined in Section 7.0.

SUSQUEHANNA UNIT 1 TRM/3.2-42 EFFECTIVE DATE 04/11/2018

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9.1 References Technical Specification 3.3.1.1 9.2 Description Monitor reactor conditions to maintain THERMAL POWER / core flow outside of Stability Regions I and II of the Power / Flow map, Figure 9.1.

If the OPRM Instrumentation is OPERABLE per TS 3.3.1.1, Region I of the Power / Flow map is considered an immediate exit region.

If the OPRM Instrumentation is inoperable per TS 3.3.1.1, Region I of the Power /

Flow map is considered an immediate scram region.

Region II of the Power / Flow map is considered an immediate exit region regardless of the operability of the OPRM Instrumentation.

SUSQUEHANNA UNIT 1 TRM/3.2-59 EFFECTIVE DATE 04/11/2018

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Purpose:

110 Initial I Date:

110 STABILITY REGION I IF OPRM INOPERABLE IMMEDIATELY SCRAM lAW APPLICABLE PROCEDURE.

100 IF OPRM OPERABLE IMMEDIATELY 100 EXIT lAW APPLICABLE PROCEDURE.

STABILITY REGION II IMMEDIATELY EXITIAWAPPLICABLE PROCEDURE.

90 RESTRICTED REGION 90 IF ABOVE MELLLA BOUNDARY, IMMEDIATELY EXIT lAW APPLICABLE PROCEDURE.

80 70 c....

Q) 60 -f--.:_;_.;......;.-+-;.......;...~~...:.......;._;_.;_ 60

~

0 a..

CIS E

(i) 50 +-~...;_:-t....;.....;......;.....;...~_;_...;_;_ 50

~

1-40 30 30 20 20 10 0

0 10 20 30 40 50 60 70 80 90 100 110 Total Core Flow (Mibm/hr)

(for SLO <75% Pump Speed Use Form G0-1 00-009-2)



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Rev. 18 PL-NF-18-003 Rev. 0 Page 60 of 62

 23506(732,176

10.1 References Technical Specification 3.3.1.1 10.2 Description



Setpoints for the OPRM Instrumentation are established that will reliably detect and suppress anticipated stability related power oscillations while providing a high degree of confidence that the MCPR Safety limit is not violated. The setpoints are described in Section 2.0 and are listed below:

SP = 1.11 NP = 15 FP = 60 Mlbm / hr SUSQUEHANNA UNIT 1 TRM/3.2-61 EFFECTIVE DATE 04/11/2018

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