ML16287A737

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Cycle 26 Core Operating Limits Report Revision 0
ML16287A737
Person / Time
Site: Duane Arnold NextEra Energy icon.png
Issue date: 08/31/2016
From:
NextEra Energy Duane Arnold
To:
Office of Nuclear Reactor Regulation
Shared Package
ML16287A739 List:
References
CAL-F16-005, Rev 0
Download: ML16287A737 (23)
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Text

Revision 0 Aug*ust 2016 Duane Arnold Energy Center Cycle 26 Core Operating Limits Report Issued by Calculation:

CAL-F16-005 Rev. 0 Page 1of23 DUANE ARNOLD ENERGY CENTER CYCLE26 CORE OPERATING LIMITS REPORT Revisiqn O August2016 pate:, '?l/??i/r 6 df,4-///6 . ' ; . . . Date: Date: Page 2 qf.23 1.0 Core Operating Umits Report This Core Operating Limits Report for Cycle 26 has been prepared in accordance with the requirements of Technical Specification 5.6.5 and is applicable to operation for which rated thermal power is 1912 MWt. The core operating limits have been developed using NRC-approved methodology (Reference

1) and are established such that all applicable limits of the plant safety analysis are met. The Cycle 26 values for the core operating limits are provided in Section 3.0 of this report. 2.0 References
1. .General Electric Standard Application for Reactor Fuel (GESTAR II), NEDE-. 24011-P-A-22, November 2015. 2.
  • Supplemental Reload Licensing Report for Duane Arnold Energy Center. Reload 25 Cycle 26, 002N6817, Revision 0, July 2016. 3. Fuel Bundle Information Report for Duane Arnold Energy Center. Reload 25 Cycle 26, 002N6818, Revision 0, July 2016. 4. Duane Arnold Energy Center Cycle 25 Core Operating Limits Report, Revision 0, August 201'4*. 5. Duane Arnold Energy Center Asset Enhancement Program. Task T0201: Power/Flow Map, GE-NE-A22-00100-04-01, Revision 0, February 200Q. 6. GNF Letter MFN 16-016, from B. R. Moore to US NRC Document Control Desk, GNF2 Advantage Generic Compliance with NEDE-24011-P-A (GEST AR II), NEDC-33270P, Revision 6, March 2016. (ADAMSAccession No: ML 16084A033)

Page 3of23 _J 3.0 Core Operating Limits 1. Average Planar Linear Heat Generation Rate (APLHGR) -TS 3.2.1 a. The Maximum APLHGR (MAPLHGR) applicable to all fuel types as a *function of Planar Average Exposure (PAE) shall not exceed the limiting' curves defined by Table 1, multiplied by the smaller of the two MAPFAC/LHGRFAC factors determined from Figures 2a and 3 [also use Figures 2a and 3 for Recirculation Pump Trip Out-of-Service (RPTOOS);

Figures 2b and 3 for Turbine Bypass Valves Out-of-Service (TBVOOS);

Figures 2c and 3 for RPTOOS and TBVOOS]. Figure 1 plots the MAPLHGR curve to Table 1. b. The Maximum Linear Heat Generation Rate (MLHGR) applicable to all fuel rods for all fuel types as a function of Peak Pellet Exposure (PPE) shall not exceed the curves defined by Table 2, multiplied by the smaller of the two MAPFAC/LHGRFAC factors determined from Figures 2a and 3 [also use Figures 2a and 3 for Recirculation Pump Trip_Out-of-Service (RPTOOS);

Figures 2b and 3 for Turbine Bypass Valves Out-of-Service (TBVOOS);

Figures 2c and 3 for RPTOOS and TBVOOS]. c. During Single Loop Operation (SLO), the actual MAPLHGR applicable to all fuel types as a function of planar average exposure shall not exceed the limiting curves defined by Table 1, multiplied by the smaller of the two MAPFAC/LHGRFAC factors determined from Figures 2a and 4 [also use Figures 2a and 4 for Recirculation Pump Trip Out-of-Service (RPTOOS);

Figures 2b and 4 for Turbine Bypass Valves Out-of-Seri/ice (TBVOOS);

Figures 2c and 4 for RPTOOS and TBVOOS]. d. During Single Loop Operation (SLO), the actual MLHGR applicable to all fuel rods for all fuel types as a function of peak pellet exposure shall not exceed the limiting curves deffned by Table 2, multiplied by the smaller of the two MAPFAC/LHGRFAC factors determined from Figures 2a and 4 [also use Figures 2a and 4 for Recirculation Pump Trip Service (RPTOOS);

Figures 2b and 4 for Turbine Bypass Valves Service (TBVOOS);

Figures 2c and 4 for RPTOOS and TBVOOS]. The above MAPLHGR limits are from the Emergency Core Cooling requirements of the Loss-of-Coolant Accident (LOCA) analyses.

The above MLHGR limits are from the fuel thermal-mechanical performance limits. The individual MAPLHGR and MLHGR limits, as discussed in the BASES for TS 3.2.1, are modeled in the process computer.

The above can be used to determine the TS MAPLHGR or MLHGR limits in the event the process computer is not available.

Page 4of23

( 2. Minimum Critical Power Ratio (MCPR) -TS 3.2.2 a. The MCPR shall be equal to or greater than the Operating Limit MCPR (OLMCPR), which is a function of Core Thermal Power, Core Flow, and Scram Time (Tau). For Core Thermal Power greater than or equal to 21.7% of rated and less than 40% of rated (21.7% ::> P < 40%), the OLMCPR is given by Figure Sa [also use Figure Sa for Recirculation Pump Trip Out-of-Service (RPTOOS);

Figure Sb for Turbine Bypass Valves Out-of-Service (TBVOOS);

Figure Sc for RPTOOS and TBVOOS]. For Core Thermal Power greater than or equal to 40% of rated (P;:: 40%), the OLMCPR is the greater of either: i) The applicable flow-dependent OLMCPR determined from Figure 6, or ii) The appropriate Rated Power OLMCPR from Figure 7 or 8 [Figure 9 for Recirculation Pump Trip Out-of-Service (RPTOOS);

Figure 1 O for Turbine Bypass Valves Out-of-Service (TBVOOS);

Figure 11 for RPTOOS and TBVOOS], multiplied by the applicable dependent OLM CPR multiplier determined from Figure Sa [also use Figure 5a for Recirculation Pump Trip Out-of-Service (RPTOOS);

Figure Sb for Turbine Bypass Valves Out-of-Service (TBVOOS);

Figure Sc for RPTOOS and TBVOOS]. b. During SLO with Core Thermal Power greater than or equal to-21.7% of rated, the SLO OLMCPR is the greater of either: i) adding 0.03 to the OLMCPR determined above, or ii) a rated OLMCPR of 1.43, multiplied by the applicable dependent OLMCPR multiplier determined from Figure Sa [also use Figure Sa for Recirculation Pump Trip Out-of-Service (RPTOOS);

Figure Sb for Turbine Bypass Valves Out-of-Service (TBVOOS);

Figure Sc for RPTOOS and TBVOOS]. The above can be used to determine the TS OLM CPR limits in the event the process computer is not available.

Page S of 23

4.0 Reload

Fuel Bundles FUEL TYPE CYCLE NUMBER LOADED GNF2-P1 ODG2B401-13GZ-1 OOT2-150-T6-4117 24 8 GNF2-P1 ODG2B408-12GZ-1 OOT2-150-T6-4118 24 8 GNF2-P1 ODG2B412-16GZ-1 OOT2-150-T6-4119 24 24 GNF2-P1 ODG2B424-15GZ-1 OOT2-150-T6-4120 24 8 GNF2-P1 ODG2B439-13GZ-1 OOT2-150-T6-4121 24 16 GNF2-P1 ODG2B394-13GZ-1 OOT2-150-T6-4294 25 24 GNF2-P1 ODG2B399-12GZ-1 OOT2-150-T6-4295 25 48 G N F2-P 1 0 DG2 B413-14GZ-1 OOT2-150-T6-4296 25 32 GNF2-P1 ODG2B423-15GZ-1 OOT2-150-T6-4297 25 16 GNF2-P1 ODG2B436-12GZ-1 OOT2-150-T6-4298 25 16 G N F2-P 1 ODG2 B436-14GZ-1 OOT2-150-T6-4299 25 16 G N F2"P 1 0 DG2 B394-12GZ-1 OOT2-150-T6-4432 26 16 G N F2-P 1 ODG2 B399-12 GZ-1 OOT2-150-T6-4295 26 64 GNF2-P1 ODG2B413-13GZ-1 OOT2-150-T6-4433 26 32 GNF2-P1 ODG2B423-15GZ-1 OOT2-150-T6-4297 26 24 GNF2-P1 ODG2B436-12GZ-1 OOT2-150-T6-4434 26 16 All Cycle 26 fuel types are of the GNF2 fuel design type. Note that bundles GNF2-P10DG2B399-12GZ-1 OOT2-150-T6-4295 and GNF2-P1 ODG2B423-15GZ-100T2-150-T6-4297 loaded in Cycle 26 are identical to the bundles of the same name that were loaoed in Cycle 25. 5.0 Thermal-Hydraulic Stability

a. Continued reactor operation within the "Exclusion Region" on the power/flow map, as defined on Figure 12, is not permitted. (Surveillance Requirement 3.4.1.2) b. Continued reactor operation within the "Buffer Region" on the power/flow map, as defined in Figure 12, is not permitted when the thermal-hydraulic stability monitor is not operational.

Page 6of23 TABLE 1 Maximum Average Planar Linear Heat Generation Rate (MAPLHGR)

Limit as a Function of Planar Average Exposure for All Cycle 26 Fuel Types Planar Average MAPLHGR Exposure Limit GWD/MT (GWD/ST) kW/ft 0.00 (0.00) 13.78 18.92 (17.16) 13.78 67.00 (60.78) 6.87 70.00 (63.50) 5.50 TABLE 2 Maximum Linear Heat Generation Rate (MLHGR) Limit as a Function of Peak Pellet Exposure for All Cycle 26 Fuel Types Peak Pellet U02 MLHGR Exposure*

Limit See Table B-1 of Reference 6 Peak Pellet Gd20 3 Zone Exposure*

MLHGR Limit See Table B-2 of Reference 6 *Note that the Peak Pellet Exposure in Tables B-1 and B-2 of Reference 6 is only provided in GWD/MTU. Page 7 of 23 14.0 13.0 12.0 11.0 L..2 IB ::J :;::--10.0 c*-Cll _J 9.0 -Q) 0... ....... Q) Cll OJO'.'. Cll c L.. 0 8.0 Q),_ > ....... <( E ::i Q) E <.9 7.0 *x ....... Cll Cll 6.0 5.0 4.0 0.0 10.0 MAPLHGR vs Planar Average Exposure ' '" 20.0 "" " ". Iii.. "" 30.0 40.0 Planar Average Exposure (GWd/ST) Figure 1 Page 8 of 23 ' ' 50.0 "" \ \ 60.0 70.0 c:: tr <( u. 0::: (!) :::c ...I "C c Ill c:: -(..) <( u. a.. <( :!!: Power Dependent MAPLHGR and MLHGR Multipliers (Equipment in Service or RPTOOS) 1.10 1.00 0.90 0.80 0.70 I 0.60 0.50 I 0.40 0.30 0 10

.,. I 26% s p < 40% I Flows 50% ,,_ 21.7% s p < 26% 1 _______ Flows 50% -I 21.7% s p < 26% Flow> 50% 20 / I 30 26% s p < 40% r Flow> 50% 40 50 60 Core Thermal Power(% rated) Figure 2a Page 9 of 23 I 85% s p < 100.0% I For P < 21.7% No Thermal Limits Required For 21.7% s P < 26% and F s 50% MAPFAC(p)

= 0.634 + 0.001628 x (P-26%) LHGRFAC(p)

= 0.634 + 0.001628 x (P-26%) For 21.7% s P < 26% and F > 50% MAPFAC(p)

= 0.500 LHGRFAC(p)

= 0.500 For 26% s P < 40% and F s 50% MAPFAC(p)

= 0.708 + 0.005286 x (P-40%) LHGRFAC(p)

= 0.708 + 0.005286 x (P-40%) For 26% s P < 40% and F > 50% MAPFAC(p)

= 0.581 + 0.005786 x (P-40%) LHGRFAC(p)

= 0.581 + 0.005786 x (P-40%) For 40% s P < 60% MAPFAC(p)

= 0.791 + 0.0052 x (P-60%) LHGRFAC(p)

= 0.791 + 0.0052 x (P-60%) For 60% s P < 85% -MAPFAC(p)

= 0.922 + 0.00524 x (P-85%) LHGRFAC(p)

= 0.922 + 0.00524 x (P-85%) F.or 85% s P < 100% MAPFAC(p)

= 1 + 0.0052 x (P-100%) LHGRFAC(p)

= 1 + 0.0052 x (P-100%) -Where: P = Core Power in % of Rated F = Core Flow in % of Rated 70 80 90 100 1.10 1.00 0.90 -c. -0.80 (.) <( u.. 0::: (!) :I: ....I 0.70 "C c: C'CI a: -(.) 0.60 <( u.. a. <( :a: 0.50 I 0.40 0.30 0 Power Dependent MAPLHGR and MLHGR Multipliers (TBVOOS) I 85% s p < I 60% s p < 85.0% I

....-I 26% s P'< 40% I I I Flows 50% 21.7% s p < 26% Flows 50% 10 20 I I v I I /,/ -/ I I I 26% s p < 40% I Flow> 50% I I 121.7%' p < 26% Flow> 50% I I 30 40 50 60 Core Thermal Power(% rated) Figure 2b Page 10 of 23 For P < 21.7% No Thermal Limits Required For 21.7% s P < 26% and F s 50% MAPFAC(p)

= 0.541 + 0.016047 x (P-26%) LHGRFAC(p)

= 0.541 + 0.016047 x (P-26%) For 21.7% s P < 26% and F > 50% MAPFAC(p)

= 0.399 + 0.010698 x (P-26%) LHGRFAC(p)

= 0.399 + 0.010698 x (P-26%) For 26% s P < 40% and F s 50% MAPFAC(p)

= 0.708 + 0.005286 x (P-40%) LHGRFAC(p)

= 0.708 + 0.005286 x (P-40%) For 26% s P < 40% and F > 50% MAPFAC(p)

= 0.581 + 0.005786 x (P-40%) LHGRFAC(p)

= 0.581 + 0.005786 x (P-40%) For 40% s P < 60% MAPFAC(p)

= 0.791 + 0.0052 x (P-60%) LHGRFAC(p)

= 0.791 + 0.0052 x (P-60%) For 60% s P < 85% MAPFAC(p)

= 0.922 + 0.00524 x (P-85%) LHGRFAC(p)

= 0.922 + 0.00524 x (P-85%) For 85% s P < 100% MAPFAC(p)

= 1+0.0052 x (P-100%) . LHGRFAC(p)

= 1 + 0.0052 x (P-100%) Where: P = Core Power in % of Rated F = Core Flow in % of Rated 70 80 90 100 1.10 1.00 0.90 c:: (.) 0.80 <( LL 0:: (!) :::c ....I 0.70 "C c cu c:: -(.) 0.60 <( LL fl. <( 0.50 0.40 0.30 0 Power Dependent MAPLHGR and MLHGR Multipliers (RPTOOS & TBVOOS) I

/ I \ 60% s p < 85.0% I I 40% s p < 60% : I --I I 26% s p < 40% Flows 50% _.. .......-I I 21.7% s p < 26% I I / Flows 50% 10 20 I 26% s p < 40% I / I I I I . /I I Flow> 50% I 21.7% s p < 26% I Flow> 50% 30 40 50 60 Core Thermal Power(% rated) Figure 2c Page 11 of 23 For P < 21.7% No Thermal Limits Required For 21.7%,; P < 26% and F,; 50% MAPFAC(p)

= 0.541 + 0.016047 x (P-26%) LHGRFAC(p)

= 0.541 + 0.016047 x (P-26%) For 21.7%,; P < 26% and F > 50% MAPFAC(p)

= 0.399 + 0.010698 x (P-26%) LHGRFAC(p)

= 0.399 + 0.010698 x (P-26%) For 26% ,; P < 40% and F ,; 50% MAPFAC(p)

= 0.708 + 0.005286 x (P-40%) LHGRFAC(p)

= 0.708 + 0.005286 x (P-40%) For 26% ,; P < 40% and F > 50% MAPFAC(p)

= 0.581 + 0.005786 x (P-40%) LHGRFAC(p)

= 0.581 + 0.005786 x (P-40%) For 40% ,; P < 60% MAPFAC(p)

= 0.791 + 0.0052 x (P-60%) LHGRFAC(p)

= 0.791 + 0.0052 x (P-60%) For 60% ,; P < 85% MAPFAC(p)

= 0.887 + 0.00384 x (P-85%) LHGRFAC(p)

= 0.887 + 0.00384 x (P-85%) For 85%,; P < 100% MAPFAC(p)

= 1 + 0.007533 x (P-100%) LHGRFAC(p)

= 1 + 0.007533 x (P-100%) Where: P = Core Power in % of Rated F = Core Flow in % of Rated 70 80 90 100 Flow Dependent MAPLHGR and MLHGR Multipliers 1.10 Note: For single loop operation, 0.90 s u <( 0.80 u. 0::: (.!) J: ...J 1J c: C'CI !E 0.70 u <( 11. a. factors are determined using Figure 4 .... / / / v / v 1.00 <( 2 For F < 80.3% 0.60 MAPFAC(f)

= 0.0067594 X F + 0.45722 -LHGRFAC(f)

= 0.0067594 X F + 0.45722 For F;,: 80.3% MAPFAC(f)

= 1.0 LHGRFAC(f)

= 1.0 where: F = Core Flow in % of Rated -0.50 0.40 0 10 20 30 40 50 60 70 80 90 100 110 Core Flow (% rated) Figure 3 Page 12 of 23 1.10 1.00* 0.90 rr <C LL 0.80 (!) :c ...J "C c: Ill s 0.70 (.) a.. <C :1E 0.60 0.50 0.40 0 10 Flow Dependent MAPLHGR and MLHGR Multipliers Single Loop Operation

.... ./ For F < 38.87% MAPFAC(f)

= 0.0067594 X F + 0.45722 LHGRFAC(f)

= 0.0067594 X F + 0.45722 For F <:: 38.87% MAPFAC(f)

= 0.72 LHGRFAC(f)

= 0.72 where: F = Core Flow in % of Rated 20 30 40 50 60 70 80 90 100 Core Flow (% rated) Figure 4 Page 13 of 23 .... T --110 2.60 2.40 c: C2' a.. 2.20 {.) 2 ...J 0 2.00 1.80 1.60 1.40 1.20 1.00 Power Dependent OLMCPR Limits and Multipliers (Equipment in Service or RPTOOS) I 21.7% s p < 26% I Flow> 50% For P < 21.7% No Thermal Limits Required I 26% s p < 40% I For 21.7% s P < 26% and F s 50% Flow> 50% OLMCPR(p)

= 2.04 For 21.7% s P < 26% and F > 50% ' OLMCPR(p)

= 2.35 + 0.006977 x (26-P) For 26% s P < 40% and F s 50% OLMCPR(p)

= 1.9 + 0.01 x (40-P) f-" For 26% s P < 40% and F > 50% OLMCPR(p)

= 2.11 + 0.017143 x (40-P) For 40% s P < 60% K(p) = 1.177 + 0.0085 x (60-P) For 60% s P < 85% ---K(p) = 1.068 + 0.00436 x (85-P) For 85% s P < 100% I 21.7% s p < 26% I K(p) = 1 + 0.004533 x (100-P) Flows 50% Where: OLMCPR(p)

=Power Dependent OLMCPR Limit K(p) =Power Dependent OLMCPR Multiplier I 26% s p < 40% I P = Core Power in % of Rated I I Flows 50% F = Core Flow in % of Rated : 40% s p < 60% I I I 60% s p < 85.0% I ._ -Note: Y-axis Numbers Represent I 85% s p < 100.0% I (a) OLMCPR(p) for 21.7% s P < 40% (b) K(p) for P <= 40% 0 10 20 30 40 50 60 Core Thermal Power (% rated) Figure Sa Page 14 of 23 70 80 90 100 Power Dependent OLMCPR Limits and Multipliers (TBVOOS) 3.80 3.60 3.40 3.20 . \ I 21.7% s p < 26% Flow> 50% \I For P < 21.7% No Thermal Limits Required For 21.7% s; P < 26% and F s; 50% 1 OLMCPR(p)

= 2.53 + 0.074419 x (26-P) c: 3.00 a. () :a: -I 2.80 0 2.60 I For 21.7% s; P < 26% and F > 50% OLMCPR(p)

= 3.19 + 0.1 x (26-P) I For 26% s; P < 40% and F s; 50% I OLMCPR(p)

= 1.9 + 0.01 x (40-P) I For 26% s; P < 40% and F > 50% \. -OLMCPR(p)

= 2.11 + 0.017143 x (40-P) ,\: For 40% s; P < 60% K(p) = 1.177 + 0.0085 x (60-P) I 21.7% s p < 26% For 60% s; P < 85% K(p) = 1.068 + 0.00436 x (85-P) I Flows 50% I '\ For 85% s; P < 100% K(p) = 1 + 0.004533 x (100-P) 2.40 I I 26% SP< 40% I I Where: OLMCPR(p)

=Power Dependent OLMCPR Limit Flow> 50% K(p) = Power Dependent OLMCPR Multiplier

..._ P = Core Power in % of Rated 2.20 I ---F = Core Flow in % of Rated I ...............

I 2.00 -----1.80 I 26% s p < 40% I I Flows 50% I c: 1.60 r 40% s p < 60% l 1.40 1.20 Note: Y-axis Numbers Represent

I 60% s p < 85.0% I (a) OLMCPR(p) for 21.7% s P < 40% ----I s5% s P < 100.0% L -(b) K(p) for P 40% 1.00 0 10 20 30 40 50 60 70 80 90 100 Core Thermal Power(% rated) Figure 5b Page 15 of 23 Power Dependent OLMCPR Limits and Multipliers (RPTOOS & TBVOOS) 3.80 3.60 3.40 3.20 . \ I 21.7% s p < 26% Flow> 50% \' For P < 21.7% No Thermal Limits Required For 21.7%,; P < 26% and F,; 50% l OLMCPR(p)

= 2.53 + 0.074419 x (26-P) For 21.7%,; P < 26% and F > 50% c: 3.00 0.. (.) 2 ...J 2.80 0 2.60 I OLMCPR(p)

= 3.19 + 0.1 x (26-P) I For 26% ,; P < 40% and F,; 50% I OLMCPR(p)

= 1.93 + 0.007857 x (40-P) I For 26% ,; P < 40% and F > 50% \. . OLMCPR(p)

= 2.11+0.017143 x (40-P) 1\: For 40% ,; P < 60% K(p) = 1.177 + 0.0085 x (60-P) I 21.7% s p < 26% For 60% ,; P < B5% K(p) = 1.068 + 0.00436 x (B5-P) I Flows 50% I '\ For B5%,; P < 100% K(p) = 1 + 0.004533 x (100-P) 2.40 I I 26% s p < 40% I Where: OLMCPR(p)

= Power Dependent OLMCPR Limit Flow> 50% K(p) =Power Dependent OLMCPR Multiplier P = Core Power in % of Rated 2.20 I ---F = Core Flow in % of Rated I -..............

I 2.00 -------1.80 I 26% s p < 40% I I Flows 50% I c: 1.60 I 40% s p < 60% 1.40 1.20 Note: Y-axis Numbers Represent

I 60% s p < 85.0% I I L (a) OLMCPR(p) for 21.7% s P < 40% r--...._ 85% s p < 100.0% (b) K(p) for P 2: 40% 1.00 0 10 20 30 40 50 60 70 80 90 100 Core Thermal Power(% rated) Figure 5c Page 16 of 23 1.60 1.55 1.50 1.45 1.40 s 0:: c.. (.) 1.35 2 _. 0 1.30 1.25 1.20 1.15 1.10 0 10 20 Flow Dependent OLMCPR Limits For 30% s F < 90.4 % OLMCPR(f) = -0.00596 X F + 1.7388 For F <: 90.4% OLMCPR(f)

= 1.20 30 where: F = Core Flow in % of Rated ' "" " " "" 40 50 60 Core Flow(% rated) Figure 6 Page 17 of 23 70 ""' .. 80 90 100 f---f---..... .... 110 0::: c.. () 2 ..J 0 Option B OLMCPR vs Scram Time (Tau) BOC to EOR -2037 MWd/ST Cycle Exposure Option A 1.39 -i----;-----r--------1r--------1------;------t------+------+-----+------f 0.0 0.1 0.2 0.3 0.4 0.5 Tau Figure 7 Page 18 of 23 0.6 0.7 0.8 0.9 1.0 1.47 1.46 1.45 1.44 0::: a.. () :al: ...I 0 1.43 Option B OLMCPR vs Scram Time (Tau) EOR -2037 MWd/ST to EOC Cycle Exposure Option A 1.42 / 1.41 1.40 0.0 0.1 0.2 0.3 0.4 0.5 Tau Figure 8 Page 19 of 23 0.6 0.7 0.8 0.9 1.0 c::: c.. (..) :lE ....I 0 Option B OLMCPR vs Scram Time (Tau) RPTOOS Option A 1.50 1.48-l----+------l----+--------:.,,,_:.__

__ -+----j------+-----1----1----____j 1.42 +------+----------+-----+----------+------+--------------<

0.0 0.1 0.2 0.3 0.4 0.5 Tau Figure 9 Page 20 of 23 0.6 0.7 0.8 0.9 1.0 0::: c.. (.J :!!: -I 0 Option B OLMCPR vs Scram Time (Tau) TBVOOS Option A 1.48 1.44 0.0 0.1 0.2 0.3 0.4 0.5 Tau Figure 1 O Page 21 of 23 0.6 0.7 0.8 0.9 1.0 c.. (.) ::!: ..J 0 Option B OLMCPR vs Scram Time (Tau) RPTOOS & TBVOOS Option A 0.0 0.1 0.2 0.3 0.4 0.5 Tau Figure 11 Page 22 of 23 0.6 0.7 0.8 0.9 1.0 11 0 100 9 0 80 -.:::: N .... en .... 6 0 -0 Q; 50 c.. Cl> 0 4 0 (.) 30 2 0 10 0 --

--

-

---...... --------I--I---0 Exclusio n R eg i on 1 11111111111111 1111 1 1 1 Buffe r Re gi o n NOTE: Co nt inued ope r at i o n a b o v e t h e ME L LLA li m it or beyo n d t h e core flow l i mit is n ot a ll owed. Take ac t io n to exit the region i mmediately.

NO T E: Th e Nat ur a l Circu l ation Li ne and Minim u m P u mp Speed L ine a r e "best es ti mates" as opposed to bou n da ri es in th e powe r flow map. IT I 6 II '" I ""' .,JI 1 I I I I I Natural Cir c ulation Line -.., I / I / ----/ ---5 1 0 15 v I""" DAEC Power/Flow Map C ycle 26 -1912 MWth ME LLL A Limi t (100.64%) -........ .,.. 96% Load Line -....... _ -------_,,_ -*"""' ""'---./'. _. ,_ .,.. -..... .,.._.....-

._...... ,. ..,,...,,.

94.92% Load Lin e

--......: -,. --....,, Core Fl ow Lim it (5 1.45 Mlb/hr) Mi n imum Pump Speed 20 25 30 C o r e Flow (Mlb/hr) F igure 12 Page 2 3 o f 23 35 ... I Low FW Prot e ction Line 40 45 -..... .............

r_.....-50 55 2 1 00 2000 1 900 1800 1700 1600 1500 1400 J:: 1300 -1200 Q; 1100 1000 ... Cl> 900 .c 1-800 0 (.) 700 600 500 400 300 20 0 100 0

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