ML050750185
| ML050750185 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 03/15/2005 |
| From: | David Helker Exelon Generation Co, Exelon Nuclear |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML050750185 (22) | |
Text
lxelon Nuclear wwwexeloncorp tom 200 Exrlon Way Kennett Square PA 19348 TS 6.9.1.12 March 15, 2005 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington DC 20555 Limerick Generating Station, Unit 2 Facility Operating License No. NPF-85 NRC Docket No. 50-353
Subject:
Issuance of the Core Operating Limits Report For Reload 8, Cycle 9, Revision 0
Dear Sir/Madam:
Enclosed is a copy of the Core Operating Limits Report (COLR) for Limerick Generating Station, Unit 2, Reload 8, Cycle 9, Revision 0. Revision 0 of this report incorporates the revised cycle specific parameters resulting from the new core configuration implemented during the LGS, Unit 2 (2R08) refueling outage.
This COLR is being submitted to the NRC in accordance with LGS, Unit 2 Technical Specifications (TS) Section 6.9.1.12.
If you have any questions, please do not hesitate to contact us.
Very truly yours, David P. Helker Manager, Licensing and Regulatory Affairs Exelon Generation Company, LLC Enclosure cc: S. J. Collins, Regional Administrator, Region I, USNRC S. Hansell, USNRC Senior Resident Inspector, LGS T. Tate, Senior Project Manager [LGS], USNRC
Unit 2 Cycle 9 C CORE OPERATING LIMITS I ~ ~ P O R T F
IAMERICK GENERATING STATION UNIT 2 RELOAD 8, CYCL Prepared By:
Preparer Reviewed By: Date:
W. P. Gassmann Independent Reviewer Approved By: Date: 3//!/05 bhanager - BWII Design (GNF)
C Limerick 2, Rev. 0 age 2 Page 1 .o Terms and Definitions 5 2 .o References 6 3 .O General Information 7 4.0 MAPLHGR Limits 8 5 .O MCPR Limits 9 6.0 Linear Heat Generation Rate Limits 14 7 .O Control Rod Block Setpoints 19 8.O Turbine Bypass Valve Parameters 20 9.0 Modes of Operation 21
Limerick Unit 2 C age 3 Page Table 4-1 MAPLHGR Versus Average Planar Exposure All Fuel Types 8 Table 4-2 MAPLHGR Single Loop Operation (SLO) Reduction Factor 8 Table 5-1 Operating Limit Minimum Critical Power Ratio (OLMCPR) 10 Table 6- 1 Linear Heat Generation Rate Limits 14 Table 6-2 LHGR Single Loop Operation (SLO) Reduction Factor 14 Table 7-1 Rod Block Monitor Setpoints 19 Table 7-2 Reactor Coolant System Recirculation Flow Upscale Trip 19 Table 8-1 Turbine Bypass System Response Time 20 Table 8-2 Minimum Required Bypass Valves To Maintain System Operability 20
Limerick Unit 2 Cycle 9 C C Limerick 2, Rev.
age 4 Page Figure 5- 1 Power Dependent MCPR Limit Adjustments and Multipliers 11 Figure 5-2 Power Dependent MCPR Limit Adjustments and Multipliers - TBVOOS 12 Figure 5-3 Flow Dependent MCPR Limits MCPR(F) 13 Figure 6- 1 Power Dependent LHGR Multiplier LGHRFAC(P) 15 Figure 6-2 Power Dependent LHGR Multiplier LHGRFAC(P) - TBVOOS 16 Figure 6-3 Flow Dependent LHGR Multiplier LHGRFAC(F) 17 Figure 6-4 Flow Dependent LHGR Multiplier LHGRFAC(F) -SLO 18
Unit 2 Cycle 9 C LR Limerick 2, Rev. 0 Page 5 1.0 Terms And Defiiiitions ARTS APRM and RBM Technical Specification Analysis DTSP Rod Block Monitor Downscale Trip Setpoint End of Rated (EOR) The cycle exposure at which reactor power is equal to 3458 MWth with recirculation system flow equal to 1 OO%, all control rods fully withdrawn, all feedwater heating in service and equilibrium Xenon.
FFWTR Final Feedwater Temperature Reduction FWHOOS Feedwater Heaters Out of Service HTSP Rod Block Monitor High Trip Setpoint ICF Increased Core Flow ITSP Rod Block Monitor Intermediate Trip Setpoint LHGR Linear Heat Generation Rate LHGRFAC(F) ARTS LHGR thermal limit flow dependent adjustments and multipliers LHGRFAC(P) ARTS LHGR thermal limit power dependent adjustments and multipliers LTSP Rod Block Monitor Low Trip Setpoint MAPLHGR Maximum Average Planar Linear Heat Generation Rate MCPR Minimum Critical Power Ratio MCPR(P) ARTS MCPR thermal limit power dependent adjustments and multipliers MCPR(F) ARTS MCPR thermal limit flow dependent adjustments and multipliers MELLLA Maximum Extended Load Line Limit Analysis OLMCPR Operating Limit Minimum Critical Power Ratio RCF Rated Core Flow RPTOOS Recirculation Pump Trip Out of Service SLMCPR Safety Limit Minimuni Critical Power Ratio SLO Single Loop Operation TBVOOS Turbine Bypass Valves Out of Service
erick Unit 2 Cycle 9 C e Limerick 2, Rev.
age
- 2. References I . Technical Specifications and Bases for Limerick Generating Station Unit 2, Docket No. 50-353, License No. NPF-85.
- 2. Supplemental Reload Licensing Report for Limerick Generating Station Unit 2 Reload 8 Cycle 9, Global Nuclear Fuel Document No. 0000-0031-7705-SRLR, Revision 0, January 2005.
3 . GE14 Fuel Design Cycle-Independent Analyses for Limerick Generating Station Units 1 and 2,GE-NE-L12-00884-00-0IP, March 2001.
- 4. OPL-3 Transient Protection Parameters Verification for Reload Licensing Analyses for Limerick 2 Reload 8 Cycle 9, TODI 04-00254
- 5. ARTS Flow-Dependent Limits with TBVOOS for Peach Bottom Atomic Power Station and Limerick Generating Station, GENE Document NEDC-32847P, June 1998.
- 6. General Electric Standard Application for Reactor Fuel, NEDE-24011-P-A- 14, June 2000 and U.S.
Supplement NEDE-24011-P-A- 14-US, June 2000.
- 7. Power Range Neutron Monitoring System Setpoint Calculations Limerick Generating Station, Units 1
&2 Mod. No. P00224, LE-0107, Rev. 0, March 2000.
- 8. Limerick 1 and 2 Off-Rated Analyses Below the PLU Power Level, GE Nuclear Document No. GE-NE-0000-0037-3253-R0, March 2005.
- 9. Fuel Bundle Information Report for Limerick Generating Station Unit 2 Reload 8 Cycle 9, Global Nuclear Fuel Document No. 0000-0031-7705-FBIR, January 2005.
L i ~ ~ r i cUnit k 2 Cycle 9 C 3.0 General Information This report provides the following cycle-specific parameter limits for Limerick Generating Station Unit 2 Cycle 9:
0 Maxiinurn Average Planar Linear Heat Generation Rate (MAPLHGR) 0 Minimum Critical Power Ratio (MCPR) e Single Loop Operation (SLO) MCPR adjustment 0 ARTS MCPR thermal limit adjustments and multipliers (MCPR(P) or MCPR(F))
0 ARTS LHGR thermal limit multipliers (LHGRFAC(P) or LHGRFAC(F))
0 Rod Block Monitor (RBM) setpoints 0 MAPLHCR single loop operation reduction factor 0 LHGR single loop operation reduction factor 0 Linear Heat Generation Rate (LHGR) 0 Turbine Bypass Valve parameters e Reactor Coolant System Recirculation Flow Upscale Trips These values have been determined using NRC-approved methodology (Reference 6), and are established such that all applicable limits of the plant safety analysis are met.
This report is prepared in accordance with Technical Specification 6.9.1.9 of Reference 1 . Preparation of this report was performed in accordance with Exelon Nuclear, Nuclear Fuel Management T&RM NF-AB- 120-3600.
The data presented in this report is valid for all licensed operating domains on the operating map, including:
0 Maximum Extended Load Line Limit down to 81% of rated core flow during full power operation e Increased Core Flow (ICF) up to 110% of rated core flow 0 Final Feedwater Temperature Reduction (FFWTR) up to 105°F during cycle extension operation 0 Feedwater Heater Out of Service (FWHOOS) up to 60°F feedwater temperature reduction at any time during the cycle prior to cycle extension.
Further information on the cycle specific analyses for Limerick 2 Cycle 9 and the associated operating domains discussed above is available in Reference 2.
Unit 2 Cycle 9 C C Page 8
- 4. APLHGR Limi The MAPLHGR limits provided in Tables 4-1 and 4-2 are referenced in Technical Specifications 3.2.1. The limiting MAPLHGR value for the most limiting lattice (excluding natural uranium) of each fuel type as a function of average planar exposure is given in Table 4-1 (References 2). The limiting MAPLHGR value is the same for all fuel types in the Limerick Unit 2 Cycle 9 core. Table 4-1 is used when hand calculations are required as specified in Technical Specification 3.2.1. For single loop operation, a reduction factor is used which is shown in Table 4-2 (Reference 2).
TABLE 4-1 MAPLHGR Versus Average Planar Exposure All Fuel Types (Reference 2)
Average Planar Exposure MAPLHGR Limit (GWD/ST) (kW/ft) 0.0 12.82 14.51 12.82 19.13 12.82 57.61 8.00 63.50 5.00 TABLE4-2 MAPLHGR Single Loop Operation (SLO) Reduction Factor (Reference 2)
SLO Reduction Factor 0.80
~ ~ i m e r2,i cRev.
~
Page
- 5. MCPR Limits The MCPR values provided in Table 5-1 are referenced in Technical Specification 3.2.3. Table 5-1 is derived from the Reference 2 analyses and is valid for all Cycle 9 fuel types and operating domains. Table 5-1 includes treatment of these MCPR limits for SLO. Bounding MCPR values are also provided for inoperable Recirculation Pump Trip or inoperable Steam Bypass System. These two options represent the Equipment Out of Service conditions. The cycle exposure that represents EOR is given in the latest verified and approved Cycle Management Report or an associated Engineering Change Request.
ARTS provides for power- and flow-dependent thermal limit adjustments and multipliers, which allow for a more reliable administration of the MCPR thermal limit. The flow-dependent adjustment MCPR(F) is sufficiently generic to apply to all fuel types and operating domains (References 2 and 5 ) . In addition, there are also two sets of power-dependent MCPR multipliers for use with the Turbine Bypass Valves in service and TBVOOS conditions (Reference 8). Section 8.0 contains the conditions for Turbine Bypass Valve Operability. These adjustments and multipliers are shown in Figures 5-1 through 5-3 and are referred to by Technical Specification 3.2.1. The MCPR(P) curves are independent of recirculation pump trip operability (Reference 8).
Unit 2 Cycle 9 CO LIP Limerick TABLE 5-1 Operating Limit Minimum Critical Power Ratio (OLMCP (Reference 2)
TBV In Service and TBV out of Service RPT Out of Service RPT In Service (TBVOOS) (RPTOOS)
OPT. B OPT. A (FO)(I) (4) 1.37 I 1.40 1.42 I 1.45 1.44 I 1.44'" 1 .44'2' 1.44'"
1.44"' I 1.44"' ~
- 1. When Tau does not equal 0 or 1, determine OLMCPR via linear interpolation.
- 2. OLMCPR limit set by the Single Loop Operation Recirculation Pump Seizure Analysis (Reference 2).
- 3. This table is valid for all Cycle 9 fuel types.
Limerick Unit 2 Cycle 9 C imerick 2, Rev. 0 Page 11 FIGURE 5-1 Power Dependent MCPR Limit Adjustments And Multipliers This Figure Is Valid For All Operating Domains except TBVOOS (References 2 and 8) 4 . 0 3.8 EFATING LIME K P R ( P) = K,
- OPERATING LIME McpR(100) 3.6 3.41 OR P < 25%: : NO THERMAL LIMIT MONITORING REQUIRED 3.4 > 60% Flovl NO LIMITS SPECIFIED 3.2 OR 25% 5 P < P,,,,,,ss : (P,,,l,,ss = 30%)
\
6?
0 2 3.0 2.95 OI,MCPR(P) = [ 2.46 + 0.044(30% - P)]
FOR 5 60% CORE FLOW L.
2
-2.8 6 OLMCPR(P) = 12.95 + 0.092(30%)- P)]
E 8 2.6 FOR > 60% CORE FLOW 0
g 2.4
/
'OR 30% 5 P < 40%>: Kp = 1.347 + 0.0134(40% - P) 0
< 60% Flow
- 'OR 40% 5 P < 50% : Kp = I .30 + O,OO47O(SO% - P )
WJ
- 2 . 2 11 L.
'OR 50% 5 P < 6 0 8 : Kp = 1 . 15 + 0.00867(60% - P) 2 1cc 2 - o
- OR 60% 5 P
- Kp = I .00 + 0.00375( 100% - P) 6 1.8 E
1.6 1.4 1.2 1.0 0 20 40 60 80 100 Power (% Rate
Limerick Unit 2 Cycle Limerick 2, Rev.
Page 12 Power Dependent MCPR Limit Adjustments And Multipliers - TBVOOS This Figure Is Valid For The T Operating Domain (References2 and 8) 5.0 4 . 6 g
c) 4.2 3.8 q 3.79
)PERATlNGLlMIT MCIR(P) = K,,
- OPERATlNG LlMlT MCPR( 100)
- OR P < 2S%
- NO THERMAL LlMlT MONITORING REQUlRED NO LIMITS SPECIFIED n
-e c
L 0
3.4
- OR 25% 5 P < P,I : (PBYI,,,,,= 70%)
a n
0 OLMCPR(P) = 12.65 + 0.088(30% - P)]
5 0
8 3.0 FOR 5 60% CORE FLOW 0 OLMCPR(P) = 13.79 + 0.1S4(30% - P)]
1 n FOR > 60% CORE FLOW
- 2.6 c
< 60% Flow
-4a - ;OR 30% 5 P < SO% . K,, = 1.37 + 0.0096S(S0% - P )
I cf n
0 2.2 OR SO% 5 P < 60% : K,, = 1. IS + 0.00867(60% - P)
I
- OR60%5P: K,, = 1.OO + O.00375( 100% - P) 1.8 1.4 1.0 0 20 40 60 80 10 0 Power ( % Rated)
Limerick Unit 2 Cycle 9 C Page 13 Flow Dependent MCPR Limits MCPR(F)
This Figure Is Valid For All Operating Domains (References 2 and 5) 2.00 For Two Loop Operation, 1.90 MCPR(F) = The Maximum of EITHER 1.25 OR { -0.5784 x (WdlOO) + 1.7073) 1.80 WT = % Rated Core Flow 1.70 n 1.60 u.
Y a
a 0
H 1.50 1.40 1.30 1.20 1.10 30 4 0 50 60 70 80 90 100 110 Core Flow ( % Rated)
Limerick Unit 2 Cycle 9 COL C Page 14
- 6. Linear Heat Generation The maximum UO2 LHGR value for each fuel type for use in Technical Specification 3.2.4 is provided in Table 6-1 below. The LHGR is an exposure dependent value. Due to the proprietary nature of these values only the maximum UO2LHGR for each fuel type is listed in Table 6-1.
ARTS provides for power- and flow-dependent thermal limit multipliers, which allow for a more reliable administration of the LHGR thermal limits. There are two sets of flow-dependent LGHR multipliers for dual-loop and single-loop operation (References 2, 3 , and 5 ) . In addition, there are also two sets of power-dependent LHGR multipliers for use with the Turbine Bypass Valves in service and TBVOOS conditions (Reference 8). Section 8.0 contains the conditions for Turbine Bypass Valve Operability. The LHGR multipliers are shown in Figures 6-1 through 6-4 and are referred to by Technical Specification 3.2.4.
Thermal limit monitoring must be performed with the more limiting LHGR limit resulting from the power-and flow-biased calculation. The LHGRFAC(P) curves are independent of recirculation pump trip operability (Reference 8).
TABLE 6-1 Linear Heat Generation Rate Limits (Reference9)
FUEL TYPE MAXIMUM VALUE GE14 1 3.4 kWIft TABLE 6-2 LHGR Single Loop Operation (SLO) Reduction Factor (Reference2)
SLO Reduction Factor' 0.80 I
Applicd through Figure 6-4
Limerick Unit 2 Cycle C Limerick 2, Rev.
Page 15 FIGURE 6-Power Dependent LI-IGR Multiplier LHG This Figure Is Valid For All Operating (References2 an 1.0 0.8 ius 2I2 3: 0.6 c;l z -i60% Flow 0
c) \ i u &
0.485 +--d
- 0.490 dGR(P) = LHCRFAC(P)
- LHGnctd 8 0.434t p 0 . 4 7 3 3 0.4 FOR P < 25% : NO THERMAL LIMIT MONITORING REQUIRED n
Q NO LIMITS SPECIFIED I
E D4
> 60% Flow FOR 25% 5 P < 30% LHGIIF;AC(P)= 0.490 + O.oOlO(P-30)
For 5 60% Flow 0.2 LHGRFAC(P) = 0.473 + 0.0078(P-30)
For > 60% Flow FOR 30% 5 P : LHGRFAC(P) = 1 .0 + O.oO5224(P-100) 0.0 0 20 40 60 80 10 0 Power (% Rated)
Limerick Unit 2 Cycle 9 COL C Power Dependent LI-IG GRFAC(P) - TBV This Figure Is Valid For The TBVOOS 1.0 0.8 h
2U 0 0.6 I .HGR(P) = LHGRFAC(P)
-I 5
c 'OR P c 25% NO THERMAL LIMIT MONITORING REQUIRED 0
iu NO LIMITS SPECIFIED LL LT 0.4 'OR 25% 5 P < 30% LHGRFAC(P) = 0.490 + 0.0054(P-30)
-I For 5 60% Flow ci 0.35 ,
s LHGRFAC(P) = 0.386 + 0.0068(P-30) b For z 60% Flow 3 : > 60% Flou 0
a 0.2 'OR 30% 5 P < 50% : LHGRFAC(P) = 0.939 + 0.005224(P-100
'OR P 5 50% : LHGRFAC(P) = 1.O + 0.005224(P-100) 0.0 0 20 4 0 60 80 100 Power ( % Rated)
Limerick Unit 2 Cycle 9 C FIGURE 6-3 Flow Dependent LHG ~ultiplierLHGRFAC(F)
This Figure Is Valid For All Operating Domains Excluding Single Loop Operation (References 2,3 and 5) 1.1 1.0 0.9 h
0 g
c 3
0.8 I
-I L
0 c
0 m
U
- 0.7 LHGR(F) = LHGRFAC(F)
- LHGRstd U
a c3 I
-I FOR Two Loop Operation, > 70% WT LHGRFAC(F) = The Minimum of EITHER 1.0 0.6 OR I0.0268 x (WT-70)/10+0.9732}
FOR Two Loop Operation, I 70% WT LHGRFAC(F) = (0.6682 x WT/l00)+0.5055 0.5 Where WT = Yo Rated Core Flow 0.4 30 40 50 6 0 70 80 90 100 110 Core Flow ( % Rated)
FIGURE 6-Flow Dependent LHGR Multiplier LHGRFAC(F) - SL This Figure Is Valid For Single Loop Operation (References 2 and 5) 1.1 1.0 0.9 0.8 0.7 LHGR(F) = LHGRFAC(F)
- LHGRstd FOR Single Loop Operation, 0.6 LHGRFAC(F) = The Minimum of EITHER 0.80 OR 0.6682 x (WT/100)+0.5055 Where WT = O% Rated Core Flow 0.5 0 . 4 30 4 0 50 60 7 0 80 90 10 0 110 Core Flow ( % Rated)
nit 2 Cycle 9 C C Page 19 7.0 Control Rod Block Setpoin Technical Specification Limiting Condition for Operation number 3.3.6 requires control rod block instrumentation channels shall be OPERABLE with their trip setpoints consistent with the values shown in the Trip Setpoint column of Technical Specification Table 3.3.6-2. The Reactor Coolant System Recirculation Flow Upscale Trip is a cycle-specific value and as such is found in Table 7-2 of this COLR. Table 7-2 lists the Nominal Trip Setpoint and Allowable Value. These setpoints are set high enough to allow full utilization of the enhanced ICF domain up to 110% of rated core flow. Additionally, the ARTS Rod Block Monitor provides for power-dependent RBM trips. The trip setpoints/allowable values and applicable RBM signal filter time constant data are shown in Table 7-1. These values are for use with Technical Specification 3.3.6.
TABLE 7-1 Rod Block Monitor Setpoints' (References 2 and 7)
Nominal Trip Setpoint Allowable Value LTSP 121.5% 121.5%
ITSP 116.5% 116.5%
HTSP 1 1 1 .O% 1 1 1.7%
DTSP 92.0% 89.0%
Notes:
1 . These setpoints (with Rod Block Monitor filter time constant between 0.1 seconds and 0.55 seconds) are based on a cycle-specific rated RWE MCPR liniit which is less than or equal to the minimum cycle OLMCPR (see COLR references 2 and 7).
Nominal Trip Setpoint 113.4%
Allowable Value 115.6%
Limerick Unit 2 Cycle 9 COL Limerick 2, Rev. 0 Page 2 8.0 Turbine Bypass Valve Parameters The operability requirements for the steam bypass system for use in Technical Specifications 3.7.8 and 4.7.8.C are found in Tables 8-1 and 8-2 (Reference 5 and 10). If these requirements cannot be met, the MCPR, MCPR(P) and LHGRFAC(P) limits for inoperable Steam Bypass System, known as Turbine Bypass Valve Out Of Service, must be used.
TABLE 8-1 Turbine Bypass System Response Time (Reference 4)
Maxiinuin delay time before start of bypass valve opening following generation of the turbine bypass valve flow signal 0.11 sec Maximum time after generation of a turbine bypass valve flow signal for bypass valve position to reach 80% of full flow 0.31 sec (includes the above delay time)
TABLE 8-2 Minimum Required Bypass Valves To Maintain System Operability (Reference 8)
Reactor Power No. of Valves in Service I P 2 30% I 7
Limerick Generating Station has been analyzed to operate with a number of operational flexibility features, including Increased Core Flow, Maximum Extended Load Line Limit, Coastdown, EOC Recirculation Pump Trip and Option A/B MCPR Limits. Limerick Generating Station has also been analyzed to operate with a number of equipment out-of-service conditions, including Turbine Bypass Valves OOS, Single Loop Operation, Feedwater Heating OOS, and Final Feedwater Temperature Reduction. Operation is allowed in any combination of these operational flexibility features and equipment out-of-service conditions, with one EXCEPTION, which is that Limerick may NOT operate with EOC-Recirculation Pump Trip out-of-service in conjunction with Turbine Bypass Valves 00s.