ML22326A032
| ML22326A032 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 11/17/2022 |
| From: | Patrick Boyle Constellation Energy Generation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| 22-0048 | |
| Download: ML22326A032 (1) | |
Text
Dresden Nuclear Power Station 6500 North Dresden Road Constellation~ Morris, IL 60450 SVPL TR# 22-0048 November 17, 2022 U.S. Nuclear Regulatory Commission ATTN : Document Control Desk Washington , DC 20555-0001 Dresden Nuclear Power Station , Unit 3 Renewed Facility Operating License No. DPR-25 NRC Docket No. 50-249
Subject:
Core Operating Limits Report for Dresden Unit 3 Cycle 28 The purpose of this letter is to transmit the Core Operating Limits Report (COLR) for Dresden Nuclear Power Station (DNPS) Unit 3 operating cycle 28 (D3C28) in accordance with Technical Specifications Section 5.6.5, "CORE OPERATING LIMITS REPORT (COLR) ."
There are no regulatory commitments contained in th is submittal.
Should you have any questions concerning this letter, please contact Mr. Duane Avery, Acting Regulatory Assurance Manager, at (815) 416-2804.
Respectfully ,
~~f~
Site Vice President Dresden Nuclear Power Station
Enclosure:
Core Operating Limits Report for Dresden Unit 3, Revision 18 CC: Regional Administrator - NRC Region Ill NRC Senior Resident Inspector - Dresden Nuclear Power Station
COLR Dresden 3 Revision 18 Core Operating Limits Report For Dresden Unit 3 Cycle 28
/ ~ I' Digitally signed by Eastmond,
~~ ~~:rEastmond, ~n~ ' ,
Prepared By:
- u Date.2022.10.1310.23.10-0500 Date: _ _ __
Annie Eastmond - Nuclear Fuels
~ Digitally signed by Smith, Kevin Smith, Kevin David~d Reviewed By: i1-oate: 2022.10.1312,37,19-05*00* Date: _ _ _ __
Kevin Smith - Nuclear Fuels Digitally signed by Markland, JT
~ 7. . I } ' / ~ ll. Thomas Reviewed By: Date: 2022.10.13 13:16:01 -05'00' Date: _ _ __
JT Markland - Engineering Safety Analysis
\) Digitally signed by Fanning, Independent /,Alexandra Review By:
c:/-rfafe, 2022.10.13 11,1s:50-05*00*
Date: _ _ __
Alex Fanning - Reactor Engineering Bernhardt, Joseph)'Digitally signed by Bernhardt,
- oseph Robert Approved By: Robert 6 ~~e:2022.10.2107:20:54-05'00* Date: - - - - -
Joe Bernhardt- Acting NF Senior Manager
. . ,. /) /) sf
- ~ ;f}J~
Digitally signed by Degraaf, Brandon Michael Date: 2022.11.04 23:40:13 -05'00' SQR By: Date: - - - - -
Brandon de Graaf- Station Qualified Reviewer Page 1 of 32
COLR Dresden 3 Revision 18 Table of Contents Page Record of Dresden 3 COLR Revisions ............................................................................................ 3 List of Tables .................................................................................................................................... 4
- 1. Terms and Definitions ............................................................................................................................... 5
- 2. General Information .................................................................................................................................. 6
- 3. Average Planar Linear Heat Generation Rate .......................................................................................... 7
- 4. Operating Limit Minimum Critical Power Ratio ......................................................................................... 8 4.1. Manual Flow Control MCPR Limits ................................................................................................... 8 4.1.1. Power-Dependent MCPR ........................................................................................................... 8 4.1.2. Flow-Dependent MCPR .............................................................................................................. 8 4.2. Scram Time ........................................................................................................................................ 9 4.3. Exposure Dependent MCPR Limits .................................................................................................. 10 4.4. Recirculation Pump ASD Settings .................................................................................................... 10
- 5. Linear Heat Generation Rate .................................................................................................................. 21
- 6. Control Rod Block Setpoints ................................................................................................................... 24
_ 7. Stability Protection Setpoints .................................................................................................................. 25
- 8. Modes of Operation ................................................................................................................................. 26
- 9. Methodology ............................................................................................................................................ 30
- 10. References ............................................................................................................................................ 32 Page 2 of 32
COLR Dresden 3 Revision 18 Record of Dresden 3 Cycle 28 COLR Revisions Revision Description 18 Initial issuance for D3C28 Page 3 of 32
COLR Dresden 3 Revision 18 List of Tables Page Table 3-1: MAPLHGR SLO Multiplier ........................................................................................................... 7 Table 3-2: MAPLHGR for ATRIUM 10XM .................................................................................................... 7 Table 4-1: Scram Times ................................................................................................................................ 9 Table 4-2: Exposure Basis for Transient Analysis ...................................................................................... 10 Table 4-3: ATRIUM 10XM TLO MCPRp Limits for NSS Insertion Times BOC to EOFPLB (37,544 MWd/MTU Core Average Exposure) ............................................................................................. 11
- Table 4-4: ATRIUM 10XM TLO MCPRp Limits for ISS Insertion Times BOC to EOFPLB (37,544 MWd/MTU Core Average Exposure) ............................................................................................. 12 Table 4-5: ATRIUM 10XM TLO MCPRp Limits forTSSS Insertion Times BOC to EOFPLB (37,544 MWd/MTU Core Average Exposure) ............................................................................................. 13 Table 4-6: ATRIUM 10XM TLO MCPRp Limits for NSS Insertion Times EOFPLB to EOCLB (38,108 MWd/MTU Core Average Exposure) ............................................................................................. 14 Table 4-7: ATRIUM 10XM TLO MCPRp Limits for ISS Insertion Times EOFPLB to EOCLB (38,108 MWd/MTU Core Average Exposure) ............................................................................................. 15 Table 4-8: ATRIUM 10XM TLO MCPRp Limits for TSSS Insertion Times EOFPLB to EOCLB (38,108 MWd/MTU Core Average Exposure) ............................................................................................. 16 Table 4-9: ATRIUM 10XM SLO MCPRp Limits for NSS Insertion Times, All Exposures ........................... 17 Table 4-10: ATRIUM 10XM SLO MCPRp Limits for ISS Insertion Times, All Exposures .......................... 18 Table 4-11: ATRIUM 10XM SLO MCPRp Limits for TSSS Insertion Times, All Exposures ....................... 19 Table 4-12: ATRIUM 10XM MCPR1 Limits .................................................................................................. 20 Table5-1: LHGRLimitsforATRIUM 10XM ................................................................................................ 21 Table 5-2: ATRIUM 10XM LHGRFACp Multipliers for All Scram Insertion Times, All Exposures ............. 22 Table 5-3: ATRIUM 10XM LHGRFACf Multipliers for All Cycle 28 Exposures, All EOOS ......................... 23 Table 6-1: Rod Block Monitor Upscale Instrumentation Setpoints ............................................................. 24 Table 7-1: OPRM PBDA Trip Settings ........................................................................................................ 25 Table 8-1: Modes of Operation .................................................................................................................. 26 Table 8-2: Core Thermal Power Restriction for EOOS Conditions ............................................................. 27 Page 4 of 32
COLR Dresden 3 Revision 18
- 1. Terms and Definitions AOO Anticipated operational occurrence ASD Adjustable speed drive BOC Beginning of cycle CAVEX Core average exposure CRWE Control rod withdrawal error CTP Core thermal power D3C28 Dresden Unit 3 Cycle 28 EFPD Effective full power day EFPH Effective full power hour EOCLB End of cycle licensing basis EOFPL End of full power life EOFPLB End of full power licensing basis EOOS Equipment out of service FHOOS Feedwater heater out of service FRV Feedwater regulating valve FWT Feedwater temperature ICF Increased core flow ISS Intermediate scram speed LHGR Linear heat generation rate LHGRFACr Flow dependent linear heat generation rate multiplier LHGRFACp Power dependent linear heat generation rate multiplier LPRM Local power range monitor MAPLHGR Maximum average planar linear heat generation rate MCPR Minimum critical power ratio MCPRr Flow dependent minimum critical power ratio MCPRp Power dependent minimum critical power ratio MELLLA Maximum extended load line limit analysis MSIVOOS Main steam isolation valve out of service MWd/MTU Megawatt days per metric ton Uranium NSS Nominal scram speed OLMCPR Operating limit minimum critical power ratio OOS Out of service OPRM Oscillation power range monitor PBDA Period based detection algorithm PCOOS Pressure controller out of service PLU Power load unbalance PLUOOS Power load unbalance out of service SLMCPR Safety limit minimum critical power ratio SLO Single loop operation SRV Safety/relief valve SRVOOS Safety/relief valve out of service TBV Turbine bypass valve TBVOOS Turbine bypass valves out of service TCV Turbine control valve TCV SLOWC TCV slow closure TIP Traversing in-core probe TLO Two loop operation TMOL Thermal mechanical operating limit TRM Technical Requirements Manual TSSS Technical Specification scram speed TSV Turbine stop valve Page 5 of 32
COLR Dresden 3 Revision 18
- 2. General Information This report is prepared in accordance with Technical Specification 5.6.5. The D3C28 reload is licensed by Framatome.
Licensed rated thermal power is 2957 MWth. Rated core flow is 98 Mlb/hr. Operation up to 108% rated core flow is licensed for this cycle. For allowed operating regions, see applicable power/flow map.
The licensing analysis supports full power operation to EOCLB (38,108 MWd/MTU CAVEX). Note that this value includes coastdown, where full power operation is not expected. Coastdown is defined as operation beyond EOFPL (assumed to be 37,544 MWd/MTU CAVEX for licensing purposes) with the plant power gradually reducing as available core reactivity diminishes. The minimum allowed coastdown power level is 40% rated CTP per Reference 1.
The transient analysis limits are provided for operation up to specific CAVEX exposures as defined in Section 4.3.
Power and flow dependent limits are listed for various power and flow levels. Linear interpolation on power and flow (as applicable) is to be used to find intermediate values.
Only MCPRp varies with scram speed. All other thermal limits are analyzed to remain valid with NSS, ISS, and TSSS.
LHGRFAC1 is independent of feedwater temperature and EOOS conditions.
For thermal limit monitoring above 100% rated power or 108% rated core flow, the 100% rated power or the 108% core flow thermal limit values, respectively, shall be used. Steady state operation is not allowed in this region. Limits are provided for transient conditions only.
Page 6 of 32
COLR Dresden 3 Revision 18
- 3. Average Planar Linear Heat Generation Rate Technical Specifications Sections 3.2.1 and 3.4.1 Table 3-1 provides the MAPLHGR SLO multiplier for ATRIUM 10XM.
For ATRIUM 10XM fuel, the MAPLHGR values applicable for all lattices can be found in Table 3-2.
During SLO, the limits in Table 3-2 are multiplied by the fuel-specific SLO multiplier listed in Table 3-1.
Table 3-1: MAPLHGR SLO Multiplier (Reference 6)
Fuel Type Multiplier ATRIUM 10XM 0.80 Table 3-2: MAPLHGR for ATRIUM 10XM (Reference 6)
All ATRIUM 10XM Lattices Average Planar Exposure TLO MAPLHGR (MWd/MTU) (kW/ft) 0 12.20 20,000 12.20 67,000 7.73 Page 7 of 32
COLR Dresden 3 Revision 18
- 4. Operating Limit Minimum Critical Power Ratio Technical Specification Sections 3.2.2. 3.4.1, and 3.7. 7 The OLMCPRs for D3C28 were established so that less than 0.1 % of the fuel rods in the core are expected to experience boiling transition during an AOO initiated from rated or off-rated conditions and are based on the Technical Specifications SLMCPR values (Reference 6).
Tables 4-3 through 4-12 include MCPR limits for various specified EOOS conditions. The EOOS conditions separated by "/" in these tables represent single EOOS conditions and not any combination of conditions.
Refer to Section 8 for a detailed explanation of allowable combined EOOS conditions.
4.1. Manual Flow Control MCPR Limits The OLMCPR is determined for a given power and flow condition by evaluating the power-dependent MCPR and the flow-dependent MCPR and selecting the greater of the two.
4.1.1. Power-Dependent MCPR The OLMCPR as a function of core thermal power (MCPRp) is shown in Tables 4-3 through 4-11. MCPRp limits are dependent on scram times as described in Section 4.2, exposure as described in Section 4.3, FWT, and whether the plant is in TLO or SLO. TLO limits for ATRIUM 10XM fuel are given in Tables 4-3 through 4-8 and SLO limits for ATRIUM 10XM fuel are given in Tables 4-9 through 4-11.
4.1.2. Flow-Dependent MCPR Table 4-12 gives the OLMCPR limit as a function of the flow (MCPRt) based on the applicable plant condition. These values are applicable to ATRIUM 10XM.
Page 8 of 32.
COLR Dresden 3 Revision 18 4.2. Scram Time TSSS, ISS, and NSS refer to scram speeds. The scram time values associated with these speeds are shown in Table 4-1. The TSSS scram times shown in Table 4-1 are the same as those specified in the Technical Specifications (Reference 2).
To utilize the OLMCPR limits for NSS in Tables 4-3, 4-6, and 4-9, the average control rod insertion time at each control rod insertion fraction must be equal to or less than the NSS time shown in Table 4-1 below.
To utilize the OLMCPR limits for ISS in Tables 4-4, 4-7, and 4-10, the average control rod insertion time at each control rod insertion fraction must be equal to or less than the ISS time shown in Table 4-1 below.
The "Average Control Rod Insertion Time" is defined as the sum of the control rod insertion times of all operable control rods divided by the number of operable control rods. Conservative adjustments to the NSS and ISS scram speeds were made to the analysis inputs to appropriately account for the effects of 1 stuck control rod and one additional control rod that is assumed to fail to scram (Reference 6).
To utilize the OLMCPR limits for TSSS in Tables 4-5, 4-8, and 4-11, the control rod insertion time of each operable control rod at each control rod insertion fraction must be equal to or less than the TSSS time shown in Table 4-1 below. The Technical Specifications allow operation with up to 12 "slow" and 1 stuck control rod. One additional control rod is assumed to fail to scram for the system transient analyses performed to establish MCPRp limits (Reference 6). Conservative adjustments to the TSSS scram speeds were made to the analysis inputs to appropriately account for the effects of the slow and stuck rods on scram reactivity (Reference 6).
For cases below 38.5% power (Pbypass), the results are relatively insensitive to scram speed, and only TSSS analyses were performed (Reference 6).
Table 4-1: Scram Times (References 2 and 6)
Control Rod Insertion NSS (seconds) 155 (seconds) TSSS (seconds)
Fraction (%)
5 0.324 0.36 0.48 20 0.700 0.72 0.89 50 1.510 1.58 1.98 90 2.635 2.74 3.44 Page 9 of 32
COLR Dresden 3 Revision 18 4.3. Exposure Dependent MCPR Limits Exposure-dependent MCPRp limits were established to support operation from BOC to EOFPLB (CAVEX of 37,544 MWd/MTU) and EOFPLB to EOCLB (CAVEX of 38, 108 MWd/MTU) as defined by the CAVEX values listed in Table 4-2. The limits at a later exposure range can be used earlier in the cycle as they are the same or more conservative.
Table 4-2: Exposure Basis for Transient Analysis (Reference 6)
Core Average Exposure (CAVEX) Description (MWd/MTU)
Design basis rod patterns to EOFPL 37,544
+ 25 EFPD (EOFPLB)
EOCLB - Maximum licensing core 38,108 exposure, includinq coastdown 4.4. Recirculation Pump ASD Settings Technical Requirement Manual 2.1.a.1 D3C28 was analyzed with a slow flow excursion event assuming a failure of the recirculation flow control system such that the core flow increases slowly to the maximum flow physically permitted by the equipment, assumed to be 112% of rated core flow (Reference 6); therefore, the recirculation pump ASD must be set to maintain core flow less than 112% (109.76 Mlb/hr) for all runout events.
Page 10 of 32
COLR Dresden 3 Revision 18 Table 4-3: ATRIUM 10XM TLO MCPRp Limits for NSS Insertion Times BOC to EOFPLB (37,544 MWd/MTU Core Average Exposure)
(Reference 6)
Nominal FWT Core Flow Core Power(% rated)
EOOS Condition "
(% I 0 25 :5 38.5 > 38.5 100 Base / TCV Stuck :5 60 2.52 2.52 2.19 1.91 1.40 Closed / MSIVOOS > 60 2.60 2.60 2.27
- 5 60 3.42 3.42 2.59 TBVOOS 1.97 1.40
> 60 3.53 3.53 2.74 TCV Slow Closure/ :5 60 2.52 2.52 2.26 2.26 1.40 PLUOOS / PCOOS > 60 2.60 2.60 2.27 1 FRV in Manual :5 60 2.52 2.52 2.19 1.95 1.40 Mode* > 60 2.60 2.60 2.27 FHOOS Core Flow Core Power (% rated)
EOOS Condition
(% rated) 0 25 :5 38.5 > 38.5 100 Base / TCV Stuck :5 60 2.70 2.70 2.29 2.06 1.40 Closed / MSIVOOS > 60 2.72 2.72 2.29
- 5 60 3.55 3.55 2.76 TBVOOS 2.06 1.41
> 60 3.63 3.63 2.82 TCV Slow Closure/ :5 60 2.70 2.70 2.29 2.26 1.40 PLUOOS / PCOOS > 60 2.72 2.72 2.29
- See Table 8-2 for operational restrictions.
Page 11 of 32
COLR Dresden 3 Revision 18 Table 4-4: ATRIUM 10XM TLO MCPRp Limits for ISS Insertion Times BOC to EOFPLB (37,544 MWd/MTU Core Average Exposure)
(Reference 6)
Nominal FWT Core Flow Core Power (% rated)
EOOS Condition I I (% rated) 0 25 S 38.5 > 38.5 100 Base / TCV Stuck s 60 2.52 2.52 2.19 1.92 1.40 Closed / MSIVOOS > 60 2.60 2.60 2.27 TBVOOS s 60 3.42 3.42 2.59 1.97 1.40
> 60 3.53 3.53 2.74 TCV Slow Closure/ s 60 2.52 2.52 2.26 2.26 1.40 PLUOOS / PCOOS > 60 2.60 2.60 2.27 1 FRV in Manual s 60 2.52 2.52 2.19 1.95 1.40 Mode* > 60 2.60 2.60 2.27 FHOOS Cor~ c*::*** II Core Power (% rated)
EOOS Conditio
- f) 0 25 S 38.5 > 38.5 100 Base / TCV Stuck s 60 2.70 2.70 2.29 2.06 1.40 Closed / MSIVOOS > 60 2.72 2.72 2.29 TBVOOS s 60 3.55 3.55 2.76 2.06 1.41
> 60 3.63 3.63 2.82 TCV Slow Closure/ s 60 2.70 2.70 2.29 2.26 1.40 PLUOOS / PCOOS > 60 2.72 2.72 2.29 *
- See Table 8-2 for operational restrictions.
Page 12 of 32
COLR Dresden 3 Revision 18 Table 4-5: ATRIUM 10XM TLO MCPRp Limits for TSSS Insertion Times BOC to EOFPLB (37,544 MWd/MTU Core Average Exposure)
(Reference 6)
Nominal FWT Core Flow Core Power (% rated)
EOOS Condition
(% rated) 0 25 S 38.5 > 38.5 100 Base / TCV Stuck :5 60 2.52 2.52 2.19 1.99 1.40 Closed / MSIVOOS > 60 2.60 2.60 2.27
- 60 3.42 3.42 2.59 TBVOOS 1.99 1.42
> 60 3.53 3.53 2.74 TCV Slow Closure/ :5 60 2.52 2.52 2.27 2.27 1.42 PLUOOS/PCOOS > 60 2.60 2.60 2.27 1 FRV in Manual :5 60 2.52 2.52 2.19 1.99 1.44 Mode* > 60 2.60 2.60 2.27 FHOOS Core Flow Core Power (% rated)
EOOS Condition
(% rated) 0 25 S 38.5 > 38.5 100 Base / TCV Stuck :5 60 2.70 2.70 2.29 2.13 1.41 Closed / MSIVOOS > 60 2.72 2.72 2.29
- 60 3.55 3.55 2.76 TBVOOS 2.13 1.44
> 60 3.63 3.63 2.82 TCV Slow Closure / :5 60 2.70 2.70 2.29 2.27 . 1.42 PLUOOS/PCOOS > 60 2.72 2.72 2.29
- See Table 8-2 for operational restrictions.
Page 13 of 32
COLR Dresden 3 Revision 18 Table 4-6: ATRIUM 10XM TLO MCPRp Limits for NSS Insertion Times EOFPLB to EOCLB (38,108 MWd/MTU Core Average Exposure)
(Reference 6)
Nominal FWT Core Flow Core Power (% rated)
EOOS Condi
(% rated) 0 25 S 38.5 > 38.5 100 Base / TCV Stuck :s; 60 2.52 2.52 2.19 1.91 1.40 Closed / MSIVOOS > 60 2.60 2.60 2.27
- s; 60 3.42 3.42 2.59 TBVOOS 1.97 1.40
> 60 3.53 3.53 2.74 TCV Slow Closure/ :s; 60 2.52 2.52 2.26 2.26 1.40 PLUOOS/PCOOS > 60 2.60 2.60 2.27 1 FRV in Manual :s; 60 2.52 2.52 2.19 1.95 1.40 Mode* > 60 2.60 2.60 2.27 FHOOS Core Flow Core Power (% rated)
EOOS Condition
(% rated) 0 25 S 38.5 > 38.5 100 Base / TCV Stuck :s; 60 2.70 2.70 2.29 2.06 1.40 Closed / MSIVOOS > 60 2.72 2.72 2.29
- s; 60 3.55 3.55 2.76 TBVOOS 2.06 1.41
> 60 3.63 3.63 2.82 TCV Slow Closure / :s; 60 2.70 2.70 2.29 2.26 1.40 PLUOOS/PCOOS > 60 2.72 2.72 2.29
- See Table 8-2 for operational restrictions.
Page 14 of 32
COLR Dresden 3 Revision 18 Table 4-7: ATRIUM 10XM TLO MCPRp Limits for ISS Insertion Times EOFPLB to EOCLB (38,108 MWd/MTU Core Average Exposure)
(Reference 6)
Nominal FWT Core Flow Core Power (% rated)
- .:.s Condition (% rated) 0 25 S 38.5 > 38.5 100 Base / TCV Stuck ::; 60 2.52 2.52 2.19 1.92 1.40 Closed / MSIVOOS > 60 2.60 2.60 2.27
- 60 3.42 3.42 2.59 TBVOOS 1.97 1.40
> 60 3.53 3.53 2.74 TCV Slow Closure/ ::; 60 2.52 2.52 2.26 2.26 1.40 PLUOOS / PCOOS > 60 2.60 2.60 2.27 1 FRV in Manual ::; 60 2.52 2.52 2.19 1.95 1.40 Mode* > 60 2.60 2.60 2.27 FHOOS Core Flow Core Power (% rated)
EOOS Condition
(% rated) 0 25 S 38.5 > 38.5 100 Base / TCV Stuck ::; 60 2.70 2.70 2.29 2.06 1.40 Closed / MSIVOOS > 60 2.72 2.72 2.29
- 60 3.55 3.55 2.76 TBVOOS 2.06 1.41
> 60 3.63 3.63 2.82 TCV Slow Closure/ ::; 60 2.70 2.70 2.29 2.26 1.40 PLUOOS / PCOOS > 60 2.72 2.72 2.29
- See Table 8-2 for operational restrictions.
Page 15 of 32
COLR Dresden 3 Revision 18 Table 4-8: ATRIUM 10XM TLO MCPRp Limits for TSSS Insertion Times EOFPLB to EOCLB (38,108 MWd/MTU Core Average Exposure)
(Reference 6)
Nominal FWT Core Flow Core Power (% rated)
EOOS Condition
(% rated) 0 25 S 38.5 > 38.5 100 Base / TCV Stuck :s; 60 2.52 2.52 2.19 1.99 1.40 Closed / MSIVOOS > 60 2.60 2.60 2.27
- s; 60 3.42 3.42 2.59 TBVOOS 1.99 1.42
> 60 3.53 3.53 2.74 TCV Slow Closure/ :s; 60 2.52 2.52 2.27 2.27 1.42 PLUOOS / PCOOS > 60 2.60 2.60 2.27 1 FRV in Manual S60 2.52 2.52 2.19 1.99 1.44 Mode* > 60 2.60 2.60 2.27 FHOOS Core Flow Core Power (% rated)
EOOS Condition
(% rated) 0 25 S 38.5 > 38.5 100 Base / TCV Stuck :s; 60 2.70 2.70 2.29 2.13 1.41 Closed / MSIVOOS > 60 2.72 2.72 2.29
- s; 60 3.55 3.55 2.76 TBVOOS 2.13 1.44
> 60 3.63 3.63 2.82 TCV Slow Closure/ :s; 60 2.70 2.70 2.29 2.27 1.42 PLUOOS/PCOOS > 60 2.72 2.72 2.29
- See Table 8-2 for operational restrictions.
Page 16 of 32 I
-I
COLR Dresden 3 Revision 18 Table 4-9: ATRIUM 10XM SLO MCPRp Limits for NSS Insertion Times, All Exposures (Reference 6)
Nominal FWT EOOS Condition Core Power (% rated)
II include SLO) 0 25 S 38.5 > 38.5 50 Base/TCV Stuck 2.54 2.54 2.21 2.19 2.18 Closed/MSIVOOS TBVOOS 3.44 3.44 2.61 2.19 2.18 TCV Slow Closure/
2.54 2.54 2.28 2.28 2.18 PLUOOS/PCOOS FHOOS EOOS Condition Core Power (% rated)
(all include SLO) 0 25 S 38.5 > 38.5 50 Base/TCV Stuck 2.72 2.72 2.31 2.19 2.18 Closed/MSIVOOS TBVOOS 3.57 3.57 2.80 2.19 2.18 TCV Slow Closure/
2.72 2.72 2.31 2.28 2.18 PLUOOS/PCOOS Page 17 of 32
COLR Dresden 3 Revision 18 Table 4-10: ATRIUM 10XM SLO MCPRp Limits for 155 Insertion Times, All Exposures (Reference 6)
Nominal FWT EOOS Condition Core Power (% rated)
(all include SLO) 0 25 :S 38.5 > 38.5 50 Base/TCV Stuck 2.54 2.54 2.21 2.19 2.18 Closed/MSIVOOS TBVOOS 3.44 3.44 2.61 2.19 2.18
.TCV Slow Closure/
2.54 2.54 2.28 2.28 2.18 PLUOOS/PCOOS FHOOS EOOS Condition Core Power (% rated)
(all include SLO) 0 25 :S 38.5 > 38.5 50 Base/TCV Stuck 2.72 2.72 2.31 2.19 2.18 Closed/MSIVOOS TBVOOS 3.57 3.57 2.80 2.19 2.18 TCV Slow Closure/
2.72 2.72 2.31 2.28 2.18 PLUOOS/PCOOS Page 18 of 32
COLR Dresden 3 Revision 18 Table 4-11: ATRIUM 10XM SLO MCPRp Limits for TSSS Insertion Times, All Exposures (Reference 6)
Nominal FWT EOOS Condition Core Power (% rated)
(all include SLO) 0 25 :S 38.5 > 38.5 50 Base/TCV Stuck 2.54 2.54 2.21 2.19 2.18 Closed/MSIVOOS TBVOOS 3.44 3.44 2.61 2.19 2.18 TCV Slow Closure/
2.54 2.54 2.29 2.29 2.18 PLUOOS/PCOOS FHOOS EOOS Condition Core Power (% rated)
(all include SLO) 0 25 :S 38.5 > 38.5 50 Base/TCV Stuck 2.72 2.72 2.31 2.19 2.18 Closed/MSIVOOS TBVOOS 3.57 3.57 2.80 2.19 2.18 TCV Slow Closure/
2.72 2.72 2.31 2.29 2.18 PLUOOS/PCOOS Page 19 of 32
COLR Dresden 3 Revision 18 Table 4-12: ATRIUM 10XM MCPRt Limits (Reference 6)
EOOS Condition* Core Flow (% rated) MCPRt Limit Base Case / FHOOS / PCOOS I PLUOOS / 0 1.69 TCV Slow Closure / PLUOOS + PCOOS in 35 1.69 TLO and SLO / 1 FRV in Manual Mode in TLO 108 1.24 0 1.84 Any Scenario** with One MSIVOOS 35 1.84 108 1.24 0 1.87 Any Scenario** with TBVOOS 35 1.87 108 1.36 0 1.69 Any Scenario** with 1 Stuck Closed 35 1.69 TCV/TSV 108 1.24
- See Section 8 for further operating restrictions.
- "Any Scenario" implies any other combination of allowable EOOS conditions that is not otherwise covered by this table.
Note that the MCPRt limits for any scenario with 1 stuck closed TCV/TSV are identical to base case MCPRt limits. This is reflected in the thermal limit sets presented in Table 8-1.
Page 20 of 32
COLR Dresden 3 Revision 18
- 5. Linear Heat Generation Rate Technical Specification Sections 3.2.3, 3.4.1, and 3.7.7 The TMOL at rated conditions for the ATRIUM 10XM fuel is established in terms of the maximum LHGR as a function of peak pellet (rod nodal) exposure. The LHGR limits for ATRIUM 10XM fuel are presented in Table 5-1.
The power- and flow-dependent LHGR multipliers (LHGRFACp and LHGRFACt) are applied directly to the LHGR limits to protect against fuel melting and overstraining of the cladding during an AOO (Reference 6).
In all conditions, the margin to the LHGR limits is determined by applying the lowest multiplier from the applicable LHGRFACp and LHGRFAC1 multipliers for the power/flow statepoint of interest to the steady state LHGR limit (Reference 6).
LHGRFACp and LHGRFAC1 multipliers were established to support base case and all EOOS conditions for all Cycle 28 exposures and scram speeds. The LHGRFACp multipliers for ATRIUM 10XM are presented in Table 5-2. The LHGRFAC1 multipliers for ATRIUM 10XM are presented in Table 5-3. The LHGRFACp and LHGRFAC1 multipliers are applicable in both TLO and SLO.
The EOOS conditions separated by "f' in these tables represent single EOOS conditions and not any combination of conditions. Refer to Section 8 for a detailed explanation of allowable combined EOOS conditions.
Table 5-1: LHGR Limits for ATRIUM 1OXM (Reference 6)
Peak Pellet Exposure LHGR Limit (MWd/MTU) (kW/ft) 0 14.1 18,900 14.1 74,400 7.4 Page 21 of 32
COLR Dresden 3 Revision 18 Table 5-2: ATRIUM 10XM LHGRFACµ Multipliers for All Scram Insertion Times, All Exposures (Reference 6)
Nominal FWT Core Flow Core Power (% rated)
EOOS Condition
(% rated) 0 25 S 38.5 > 38.5 60 90 100 Base/TCV Stuck :;; 60 0.52 0.52 0.57 0.60 0.67 0.90 1.00 Closed/MSIVOOS > 60 0.50 0.50 0.57
- 60 0.38 0.38 0.54 TBVOOS 0.60 0.67 0.90 1.00
> 60 0.36 0.36 0.48 TCV Slow Closure/ :;; 60 0.52 0.52 0.57 0.60 0.67 0.90 1.00 PLUOOS/PCOOS > 60 0.50 0.50 0.57 1 FRV in :;; 60 0.52 0.52 0.56 0.56 0.66 0.88 0.98 Manual Mode* > 60 0.50 0.50 0.56 FHOOS Core Flow Core Power (% rated)
EOOS Condition I I (% rated) 0 25 S 38.5 > 38.5 60 90 100 Base/TCV Stuck :;; 60 0.47 0.47 0.54 0.60 0.67 0.90 1.00 Closed/MSIVOOS > 60 0.45 0.45 0.51
- 60 0.35 0.35 0.49 TBVOOS 0.60 0.67 0.90 1.00
> 60 0.34 0.34 0.45 TCV Slow Closure/ < 60 0.47 0.47 0.54 0.60 0.67 0.90 1.00 PLUOOS/PCOOS > 60 0.45 0.45 0.51
- See Table 8-2 for operational restrictions.
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COLR Dresden 3 Revision 18 Table 5-3: ATRIUM 10XM LHGRFACt Multipliers for All Cycle 28 Exposures, All EOOS (Reference 6)
Core Flow (% rated) LHGRFACt 0.0 0.57 35.0 0.57 80.0 1.00 108.0 1.00 Page 23 of 32
COLR Dresden 3 Revision 18
- 6. Control Rod s1*ock Setpoints Technical Specification Sections 3.3.2.1 and 3.4.1 The Rod Block Monitor Upscale Instrumentation Setpoints are determined from the relationships shown in Table 6-1.
Table 6-1: Rod Block Monitor Upscale Instrumentation Setpoints (Reference 3)
ROD BLOCK MONITOR UPSCALE TRIP FUNCTION ALLOWABLE VALUE Two Recirculation Loop 0.65Wd + 55%
Operation Single Recirculation Loop 0.65 Wd + 51%
Operation Wd - percent of recirculation loop drive flow required to produce a rated core flow of 98.0 Mlb/hr.
The setpoint may be lower/higher and will still comply with the CRWE analysis because CRWE is analyzed unblocked (Reference 6).
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COLR Dresden 3 Revision 18
- 7. Stability Protection Setpoints Technical Specification Section 3.3.1.3 The OPRM PBDA Trip Settings are provided in Table 7-1.
Table 7-1: OPRM PBDA Trip Settings (Reference 6)
Corresponding Maximum PBDA Trip Amplitude Setpoint (Sp) Confirmation Count Setpoint (Np) 1.10 13 The PBDA is the only OPRM setting credited in the safety analysis as documented in the licensing basis for the OPRM system (Methodology 2).
The OPRM PBDA trip settings are based, in part, on the cycle specific OLMCPR and the power/flow dependent MCPR limits. Any change to the OLMCPR values and/or the power/flow dependent MCPR limits should be evaluated for potential impact on the OPRM PBDA trip settings.
The OPRM PBDA trip settings are applicable when the OPRM system is declared operable and the associated Technical Specifications are implemented.
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COLR Dresden 3 Revision 18
- 8. Modes of Operation The allowed modes of operation with combinations of EOOS are as described in Table 8-1. The EOOS conditions separated by "/" in these tables represent single EOOS conditions and not combinations of conditions.
Note that the following EOOS options have operational restrictions: all SLO, all EOOS options with 1 TCV/TSV stuck closed, 1 MSIVOOS, and 1 FRV in Manual Mode. See Table 8-2 for specific restrictions.
Table 8-1: Modes of Operation (Reference 6)
EOOS Option Thermal Limit Set I I I BASE CASE Base Case TLO or SLO Nominal FWT or FHOOS TBVOOS TBVOOS TLO or SLO Nominal FWT or FHOOS BASE CASE 1 TCV/TSV Stuck Closed TLO or SLO Nominal FWT or FHOOS MSIVOOS One MSIVOOS TLO orSLO Nominal FWT or FHOOS PLUOOS/TCV SLOW C TCV Slow Closure TLO or SLO Nominal FWT or FHOOS PLUOOS/TCV SLOW C PLUOOS TLO or SLO Nominal FWT or FHOOS PLUOOS/TCV SLOW C PCOOS TLO orSLO Nominal FWT or FHOOS PLUOOS/TCV SLOW C PLUOOS and 1 TCV/TSV Stuck Closed TLO for Nominal FWT or FHOOS SLO for Nominal FWT*
PLUOOS/TCV SLOW C PCOOS and PLUOOS TLO for Nominal FWT or FHOOS SLO for Nominal FWT*
PLUOOS/TCV SLOW C PCOOS and 1 TCV/TSV Stuck Closed TLO for Nominal FWT or FHOOS SLO for Nominal FWT*
1 MANUAL FRV ALL POSITIONS 1 FRV in Manual Mode**
TLO for Nominal FWT***
- FHOOS cannot be applied to SLO for the cases of PLUOOS and 1 TCV/TSV Stuck Closed, PCOOS and PLUOOS, and PCOOS and 1 TCV/TSV Stuck Closed.
- Operation with 1 FRV in manual mode in the fully closed position (e.g., startup and maintenance situations) is exempt from this scenario.
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COLR Dresden 3 Revision 18 Table 8-2: Core Thermal Power Restriction for EOOS Conditions (Reference 6)
Core Flow (% of Core Thermal Power (%
EOOS Condition Rod Line(%)
Rated) of Rated Power)
I I 1 TCV/TSV Stuck Closed PCOOS and 1 TCV/TSV N/A < 75 < 80 Stuck Closed PLUOOS and 1 TCV/TSV Stuck Closed One MSIVOOS N/A < 75 N/A SLO < 51 < 50 N/A 1 FRV in Manual Mode* N/A > 38.5 (Pbypass) N/A
- Operation with 1 FRV in manual mode in the fully closed position (e.g., startup and maintenance situations) is exempt from this scenario.
All requirements for all applicable conditions listed in Table 8-2 MUST be met.
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COLR Dresden 3 Revision 18 Common Notes
- 1. Base case operation assumes:
- b. Between 25% and 50% rated power, the PLU will not actuate per Reference 8.
- d. Both dome pressure and throttle pressure control are supported per Reference 6.
- e. Operation with a feedwater temperature band of +10°F/-30°F relative to the nominal FWT presented in Reference 7, Item 2.4.3.
- f. Operation for dome pressures between the minimum and maximum bands per Reference 7, Item 2.4.5.
- 2. All modes are allowed for operation at MELLLA, ICF (up to 108% rated core flow), and coastdown subject to the power restrictions in Table 8-2 (Reference 6). The licensing analysis supports full power operation to EOCLB (38,108 MWd/MTU CAVEX). Note that this value includes coastdown, where full power operation is not expected. The minimum allowed coastdown power level is 40% rated CTP per Reference
- 1. Each OOS Option may be combined with each of the following conditions (Reference 6):
- a. Up to 40% of the TIP channels OOS or the equivalent number of TIP channels, using the guidance in Reference 4 for startup with TIP machines OOS
- 3. Nominal FWT results are valid for application within a +10°F/-30°F temperature band around the nominal FWT curve (Reference 6). For operation outside of nominal FWT, a FWT reduction of between 30°F and 120°F is supported for all FHOOS conditions listed in Table 8-1 for cycle operation through EOCLB (Reference 6). At lower power levels, the FWT reduction is less (Reference 6). Per Reference 5, there is a restriction which requires that, for a FWT reduction greater than 100°F, operation needs to be restricted to less than the 100% rod line. For a FWT reduction of between 30°F and 120°F, the FHOOS limits should be applied.
- 4. The base case and EOOS limits and multipliers support operation with 8 of 9 TBVs operational (i.e.,
one bypass valve OOS) with the exception of the TBVOOS condition, in which all bypass valves are inoperable (Reference 6). Use of the response curve in TRM Appendix H supports operation with any single TBV OOS. TRM Appendix H facilitates analysis with one valve OOS in that the capacity at 0.5 seconds from start of TSV closure is equivalent to the total capacity with eight out of the nine valves in service (Reference 7). The analyses also support Turbine Bypass flow of 29.8% of vessel rated steam flow (Reference 7), equivalent to one TBV OOS (or partially closed TBVs equivalent to one closed TBV), if the assumed opening profile for the remaining TBVs is met. If the opening profile is NOT met, or if the TBV system CANNOT pass an equivalent of 29.8% of vessel rated steam flow, utilize the TBVOOS condition.
- 5. TBVOOS assumes that ALL the TBVs do not trip open on TCV fast closure or TSV closure and that ALL the TBVs are not capable of opening via the pressure control system (Reference 8). Steam relief capacity is defined in Reference 7.
- 6. Between 25% and 50% of rated thermal power, the PLUOOS/TCV Slow Closure thermal limit set ensures that the AOO acceptance criteria are met for a load rejection event if the 86 Device is OOS (Reference 6). Therefore, use the PLUOOS/TCV Slow Closure thermal limit set between 25% and 50% of rated thermal power if the 86 Device is OOS.
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COLR Dresden 3 Revision 18 Common Notes (continued)
- 7. Operating restrictions apply when one FRV is placed in manual mode, per Reference 6. Additional EOOS conditions that are supported with 1 FRV in Manual Mode consist of 40% of TIP channels OOS and 50% of the LPRMs OOS. Other conditions associated with base case conditions, such as the feedwater temperature band, the pressure band, single and three-element level control, dome and turbine pressure control, operation with 1 SRVOOS, and operation with 1 TBV OOS, are supported as discussed in Section 5.1 of Reference 6. Operation with 1 FRV in manual mode in the fully closed position (e.g., startup and maintenance situations) is exempt from this scenario.
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COLR Dresden 3 Revision 18
- 9. Methodology The analytical methods used to determine the core operating limits shall be those previously reviewed and approved by the NRC, specifically those described in the following documents:
- 1. GE Topical Report NEDE-24011-P-A, Revision 15, "General Electric Standard Application for Reactor Fuel (GESTAR)," September 2005.
- 2. GE Topical Report NEDO-32465-A, Revision 0, "Reactor Stability Detect and Suppress Solutions Licensing Basis Methodology for Reload Applications," August 1996.
- 3. Exxon Nuclear Company Report XN-NF-81-58(P)(A), Revision 2 and Supplements 1 and 2, "RODEX2 Fuel Rod Thermal-Mechanical Response Evaluation Model," March 1984.
- 4. Advanced Nuclear Fuels Corporation Report ANF-89-98(P)(A), Revision 1 and Supplement 1, "Generic Mechanical Design Criteria for BWR Fuel Designs," May 1995.
- 5. Siemens Power Corporation Report EMF-85-74(P), Revision 0 Supplement 1 (P)(A) and Supplement 2 (P)(A), "RODEX2A (BWR) Fuel Rod Thermal-Mechanical Evaluation Model," February 1998.
- 6. AREVA NP Topical Report BAW-10247PA, Revision 0, "Realistic Thermal-Mechanical Fuel Rod Methodology for Boiling Water Reactors," February 2008.
- 7. Exxon Nuclear Company Topical Report XN-NF-80-19(P)(A), Volume 1 Revision 0 and Supplements 1 and 2, "Exxon Nuclear Methodology for Boiling Water Reactors - Neutronic Methods for Design and Analysis," March 1983.
- 8. Exxon Nuclear Company Topical Report XN-NF-80-19(P)(A), Volume 4 Revision 1, "Exxon Nuclear Methodology for Boiling Water Reactors: Application of the ENC Methodology for BWR Reloads," June 1986.
- 9. Exxon Nuclear Company Topical Report XN-NF-80-19(P)(A), Volume 3 Revision 2, "Exxon Nuclear Methodology for Boiling Water Reactors, THERMEX: Thermal Limits Methodology Summary Description," January 1987.
- 10. Siemens Power Corporation Topical Report EMF-2158(P)(A), Revision 0, "Siemens Power Corporation Methodology for Boiling Water Reactors: Evaluation and Validation of CASMO-4/MICROBURN-B2,"
October 1999.
- 11. AREVA Topical Report ANP-10298P-A, Revision 1, "ACE/ATRIUM 10XM Critical Power Correlation,"
March 2014.
- 12. AREVA NP Topical Report ANP-10307PA, Revision 0, "AREVA MCPR Safety Limit Methodology for Boiling Water Reactors," June 2011.
- 13. Exxon Nuclear Company Report XN-NF-84-105(P)(A), Volume 1 Revision 0 and Volume 1 Supplements 1 and 2, "XCOBRA-T: A Computer Code for BWR Transient Thermal-Hydraulic Core Analysis," February *1987.
- 14. Advanced Nuclear Fuels Corporation Report ANF-913(P)(A), Volume 1 Revision 1 and Volume 1 Supplements 2, 3, and 4, "COTRANSA2: A Computer Program for Boiling Water Reactor Transient Analyses," August 1990.
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COLR Dresden 3 Revision 18
May 2001.
- 16. Siemens Power Corporation Report EMF-2292(P)(A), Revision 0, "ATRIUM'-10: Appendix K Spray Heat Transfer Coefficients," September 2000.
- 17. Framatome ANP Topical Report ANF-1358(P)(A), Revision 3, "The Loss of Feedwater Heating Transient in Boiling Water Reactors," September 2005.
- 18. Siemens Power Corporation Topical Report EMF-CC-074(P)(A), Volume 4 Revision 0, "BWR Stability Analysis: Assessment of STAIF with Input from MICROBURN-B2," August 2000.
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COLR Dresden 3 Revision 18
- 10. References
- 1. Constellation Energy Generation, LLC, Docket No. 50-249, Dresden Nuclear Power Station, Unit 3, Renewed Facility Operating License No. DPR-25.
- 2. Constellation Technical Specifications for Dresden 2 and 3, Table 3.1.4-1, "Control Rod Scram Times."
- 3. Constellation Design Analysis GE ORF C51-00217-01, "Instrument Setpoint Calculation Nuclear Instrumentation Rod Block Monitor," July 30, 2012.
- 4. FANP Letter, NJC:04:031/FA804-496, "Startup with TIP Equipment Out of Service," April 20, 2004.
(Constellation EC 348897-000)
- 5. Constellation Letter, NF-MW:02-0081, "Approval of GE Evaluation of Dresden and Quad Cities Extended Final Feedwater Temperature Reduction," Carlos de la Hoz to Doug Wise and Alex Misak, August 27, 2002.
(The GE Evaluation can be found in EDMS as GE-NE-A 13-00487-00-01 P .)
- 6. Framatome Report ANP-4013P, Revision 0, "Dresden Unit 3 Cycle 28 Reload Safety Analysis," August 2022.
- 7. Constellation TOOi NF220073, Revision 0, "Dresden Unit 3 Cycle 28 Plant Parameters Document (PPD),"
January 27, 2022.
- 8. Constellation TOOi ES1500011, Revision 0, "Equipment Out of Service Description for Transition to AREVA Fuel - Dresden," May 20, 2015.
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