ML14330A550

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Enclosure 3 to NG-14-0267: Duane Arnold, Core Operating Limits Report for DAEC Cycle 25 Operation, Revision 0 (Non-Proprietary)
ML14330A550
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Site: Duane Arnold NextEra Energy icon.png
Issue date: 08/27/2014
From:
NextEra Energy Duane Arnold
To:
Office of Nuclear Reactor Regulation
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References
JMT-NEE-KE1-14-085, NG-14-0267
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Enclosure 3 to NG-14-0267 DUANE ARNOLD ENERGY CENTER CYCLE 25 CORE OPERATING LIMITS REPORT (Non-proprietary Version) 30 pages to follow

Revision 0 August 2014 Duane Arnold Energy Center Cycle 25 Core Operating Limits Report NExTera ENERGY."

DUANE Non-Proprietary Information IMPORTANT NOTICE This is a non-proprietary version of the DAEC Cycle 25 COLR, which has the proprietary information removed. Portions of the document that have been removed are indicated by white space inside open and closed bracket as shown here (( )).

NEXTera ENER.GYz -s DUANE ARNOLD DUANE ARNOLD ENERGY CENTER CYCLE 25 CORE OPERATING LIMITS REPORT Revision 0 August 2014 Prepared by::___ Date: &/2 7,2,/4 JB Nuclear Fuels Verified by: 6 -_ "_-_ _ _ _ Date: Y 47 Reactor Engineering Concurred by:' Date: '?/-v Z/

(ty..aager, 1-6ensIng Concurred by:  : _ _ _

Manager, Program Engineering

_Z Date: V4VV/J Concurred by: Q'(n

/ z Date: jqj- "

Director, Engineering Reviewed by: o Date: L )3Joi C LI--an,ORG Approved by: .__* ,.

Plant Manager, Nuclear

/ Date: 1I~~1 Page 1 of 29

1.0 Core Operating Limits Report This Core Operating Limits Report for Cycle 25 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 25 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-20, December 2013.
2. Supplemental Reload Licensing Report for Duane Arnold Energy Center, Reload 24 Cycle 25, 001N1159 Rev. 1, July 2014.
3. Fuel Bundle Information Report for Duane Arnold Energy Center, Reload 24 Cycle 25, 001N1160 Rev. 1, July 2014.
4. Duane Arnold Enerqy Center Cycle 24 Core Operating Limits Report, Revision 0, September 2012.
5. Duane Arnold Enerqy Center Asset Enhancement Program, Task T0201:

Power/Flow Map, GE-NE-A22-00100-04-01, Revision 0, February 2000.

Page 2 of 29

3.0 Core Operating Limits

1. Average Planar Linear Heat Generation Rate (APLHGR) - TS 3.2.1
a. The Maximum APLHGR (MAPLHGR) as a function of Planar Average Exposure (PAE) shall not exceed the limiting curves defined by Table la for GE14 fuel and Table lb for GNF2 fuel, multiplied by the smaller of the two MAPFAC/LHGRFAC factors determined from Figures 3a and 4 [also use Figures 3a and 4 for Recirculation Pump Trip Out-of-Service (RPTOOS); Figures 3b and 4 for Turbine Bypass Valves Out-of-Service (TBVOOS); Figures 3c and 4 for RPTOOS and TBVOOS].

Figure la plots the MAPLHGR curve corresponding to Table la (GEI4 specific). Figure lb plots the MAPLHGR curve corresponding to Table lb (GNF2 specific).

b. The Maximum Linear Heat Generation Rate (MLHGR) as a function of Peak Pellet Exposure (PPE) shall not exceed the curves defined by Table 2a for GEl4 fuel rods and Table 2b for GNF2 fuel rods, multiplied by the smaller of the two MAPFAC/LHGRFAC factors determined from Figures 3a and 4 [also use Figures 3a and 4 for Recirculation Pump Trip Out-of-Service (RPTOOS); Figures 3b and 4 for Turbine Bypass Valves Out-of-Service (TBVOOS); Figures 3c and 4 for RPTOOS and TBVOOS]. Figure 2a plots the MLHGR curve for GEl4 U0 2 fuel rods corresponding to Table 2a. Figure 2b plots the MLHGR curve for GNF2 U0 2 fuel rods corresponding to Table 2b.
c. During Single Loop Operation (SLO), the actual MAPLHGR as a function of planar average exposure shall not exceed the limiting curves defined by Table Ia for GE14 fuel and Table lb for GNF2 fuel, multiplied by the smaller of the two MAPFAC/LHGRFAC factors determined from Figures 3a and 5 [also use Figures 3a and 5 for Recirculation Pump Trip Out-of-Service (RPTOOS); Figures 3b and 5 for Turbine Bypass Valves Out-of-Service (TBVOOS); Figures 3c and 5 for RPTOOS and TBVOOS].
d. During Single Loop Operation (SLO), the actual MLHGR as a function of peak pellet exposure shall not exceed the limiting curves defined by Table 2a for all GE14 fuel rods and Table 2b for all GNF2 fuel rods, multiplied by the smaller of the two MAPFAC/LHGRFAC factors determined from Figures 3a and 5 [also use Figures 3a and 5 for Recirculation Pump Trip Out-of-Service (RPTOOS); Figures 3b and 5 for Turbine Bypass Valves Out-of-Service (TBVOOS); Figures 3c and 5 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 3 of 29

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 6a [also use Figure 6a for Recirculation Pump Trip Out-of-Service (RPTOOS); Figure 6b for Turbine Bypass Valves Out-of-Service (TBVOOS); Figure 6c 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 7, or ii) The appropriate Rated Power OLMCPR from Figure 8 or 9 [Figure 10 for Recirculation Pump Trip Out-of-Service (RPTOOS); Figure 11 for Turbine Bypass Valves Out-of-Service (TBVOOS); Figure 12 for RPTOOS and TBVOOS], multiplied by the applicable power-dependent OLMCPR multiplier determined from Figure 6a [also use Figure 6a for Recirculation Pump Trip Out-of-Service (RPTOOS);

Figure 6b for Turbine Bypass Valves Out-of-Service (TBVOOS);

Figure 6c 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 0.02 to the OLMCPR determined above, or ii) a rated OLMCPR of 1.43, multiplied by the applicable power-dependent OLMCPR multiplier determined from Figure 6a [also use Figure 6a for Recirculation Pump Trip Out-of-Service (RPTOOS);

Figure 6b for Turbine Bypass Valves Out-of-Service (TBVOOS);

Figure 6c for RPTOOS and TBVOOS].

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

Page 4 of 29

4.0 Reload Fuel Bundles CYCLE FUEL TYPE LOADED NUMBER GE14-P1ODNAB438-12G6.0-10OT-150-T6-2541 23 32 GE14-P1ODNAB421-14G7.0-10OT-150-T6-3301 23 16 GE14-P1ODNAB411-14G8.0-100T-150-T6-3304 23 16 GNF2-P1ODG2B401-13GZ-100T2-150-T6-4117 24 40 GNF2-P1ODG2B408-12GZ-100T2-150-T6-4118 24 32 GNF2-P1ODG2B412-16GZ-100T2-150-T6-4119 24 48 GNF2-P10DG2B424-15GZ-100T2-150-T6-4120 24 16 GNF2-P10DG2B439-13GZ-1 00T2-150-T6-4121 24 16 GNF2-P1 0DG2B394-13GZ-1 00T2-150-T6-4294 25 24 GNF2-P10DG2B399-12GZ-1 00T2-150-T6-4295. 25 48 GNF2-P1 ODG2B413-14GZ-1 00T2-150-T6-4296 25 32 GNF2-P1 0DG2B423-15GZ-1 00T2-150-T6-4297 25 16 GNF2-P1 0DG2B436-12GZ-1 00T2-150-T6-4298 25 16 GNF2-P10DG2B436-14GZ-1 00T2-150-T6-4299 25 16 All fuel types loaded in Cycle 23 are of the GE14 fuel design type. All fuel types loaded in Cycles 24 and 25 are of the GNF2 fuel design type.

5.0 Thermal-Hydraulic Stability

a. Continued reactor operation within the "Exclusion Region" on the power/flow map, as defined on Figure 13, 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 13, is not permitted when the thermal-hydraulic stability monitor is not operational.

Page 5 of 29

TABLE Ia Maximum Average Planar Linear Heat Generation Rate (MAPLHGR) Limit as a Function of Planar Average Exposure for Cycle 25 GE14 Fuel Types Planar Average MAPLHGR Exposure Limit GWD/MT (GWD/ST) kW/ft 0(0) 12.82 21.09 (19.13) 12.82 63.50 (57.61) 8.00 70.0 (63.50) 5.00 TABLE l b Maximum Average Planar Linear Heat Generation Rate (MAPLHGR) Limit as a Function of Planar Average Exposure for Cycle 25 GNF2 Fuel Types Planar Average MAPLHGR Exposure Limit GWD/MT (GWD/ST) kW/ft 0(0) 13.78 18.92 (17.16) 13.78 67.00 (60.78) 6.87 70.0 (63.50) 5.50 Page 6 of 29

TABLE 2a Maximum Linear Heat Generation Rate (MLHGR) Limit as a Function of Peak Pellet Exposure for Cycle 25 GE14 Fuel Types Peak U0 2 Pellet MLHGR Exposure Limit GWD/MT (GWD/ST) kW/ft

((________

Peak )) Gd 20 3 Zone Pellet MLHGR Exposure Limit GWD/MT (GWD/ST) kW/ft

((l_____________________

Page 7 of 29

TABLE 2a (continued)

Peak )) Gd 2O3 Zone Pellet MLHGR Exposure Limit GWD/MT (GWD/ST) kW/ft

((

)) Gd 203 Peak Zone Pellet MLHGR Exposure Limit GWD/MT (GWD/ST) kW/ft E[

_____________________________________))

Page 8 of 29

TABLE 2b Maximum Linear Heat Generation Rate (MLHGR) Limit as a Function of Peak Pellet Exposure for Cycle 25 GNF2 Fuel Types Peak U0 2 Pellet MLHGR Exposure Limit GWD/MT (GWD/ST) kW/ft Peak )) Gd 20 3 Zone Pellet MLHGR Exposure Limit GWD/MT (GWD/ST) kW/ft

((

))

Page 9 of 29

TABLE 2b (continued)

Peak )) Gd 20 3 Zone Pellet MLHGR Exposure Limit GWD/MT (GWD/ST) kW/ft Peak )) Gd 2 0 3 Zone Pellet MLHGR Exposure Limit GWD/MT (GWD/ST) kW/ft Peak ))Gd2 O 3 Zone Pellet MLHGR Exposure Limit GWD/MT (GWD/ST) kW/ft I((

____________________________ ))

Page 10 of 29

MAPLHGR vs Planar Average Exposure GE14 Fuel Types 14.0 13.0 12.0

. 11.0 1:E 10.0 co

,-- 9.0 00 E*

Sa) 8.0 7.0 6.0 5.0 4.0 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 Planar Average Exposure (GWd/ST)

Figure Ia Page 11 of 29

MAPLHGR vs Planar Average Exposure GNF2 Fuel Types 14.0 13.0 12.0 S 11.0 2 10.0 ca q 9.0 a 0

_)a) 8.0 E C9 7.0 6.0 5.0 4.0 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 Planar Average Exposure (GMd/ST)

Figure l b Page 12 of 29

MLHGR vs Peak Pellet Exposure Figure 2a Page 13 of 29

MLHGR vs Peak Pellet Exposure 1]

Figure 2b Page 14 of 29

Power Dependent MAPLHGR and MLHGR Multipliers (Equipment in Service or RPTOOS) 1.10 1.00 85%! P < 100.0%

0.90 40 P85.00 %5 6 0.80 4For P < 21. 7 % No Thermal Limits Required 4

LL For 21.7% 9P <26% and F 5 0%

MAPFAC(p) = 0.55 + 0.01395 x (P-26%)

LHGRFAC(p) = 0.55 + 0.01395 x (P-26%)

= 26_<P__4%____For 21.7%!5 P < 26% and F > 50%

-J 0.70 MAPFAC(p) = 0.442 + 0.00837 x (P-26%)

LHGRFAC(p) = 0.442 + 0.00837 x (P-26%)

(U For 26% ! P < 40% and F r 50%

a. MAPFAC(p) = 0.708 + 0.005286 x (P-40%)

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

6 0.60 For 26% S P < 40% and F > 50%

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

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

4 For 40% 9 P < 60%

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

21.7% *P < 26% LHGRFAC(p) = 0.791 + 0.0052 x (P-60%)

50% __OW_ _ For 60% < P < 85%

0.50 z MAPFAC(p) = 0.922 + 0.00524 x (P-85%)

26%!5 P < 40% LHGRFAC(p) = 0.922 + 0.00524 x (P-85%)

Flow > 50% For 85% 5 P < 100%

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

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

0.40 Where: P = Core Power in % of Rated 21.7%:5 P < 26% F =Core Flow in % of Rated Flow > 50%/

0.30 0 10 20 30 40 50 60 70 80 90 100 Core Thermal Power (% rated)

Figure 3a Page 15 of 29

Power Dependent MAPLHGR and MLHGR Multipliers (TBVOOS) 1.10 1.00 85%:5 P < 100.0%

0.90 60% ! P < 85.0%

S-0.80 40%:S P < 60%4 0 For P < 21.7% No Thermal Limits Required LL For 21.7% 5 P < 26% and F 5 50%

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

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

26%:5 P < 40% *

  • For 21.7%:5 P < 26% and F > 50%

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

Flow:< 50% / LHGRFAC(p) = 0.399 + 0.010698 x (P-26%)

C.,

c- For 26% < P < 40% and F 5 50%

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

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

0A For 26% 5 P <40% and F > 50%

4: 0.60 MAPFAC(p) = 0.581 + 0.005786 x (P-40%)

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

For 40%:5 P < 60%

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

21.7%:5 P < 26% LHGRFAC(p) = 0.791 + 0.0052 x (P-60%)

Fl2 5 50%

Flow For 60%:5 P < 85%

0.50 MAPFAC(p) = 0.922 + 0.00524 x (P-.85%)

26% 5 P < 40% LHGRFAC(p) = 0.922 + 0.00524 x (P-85%)

Flow > 50%

m For 85%:5 P < 100%

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

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

0.40 Where: P = Core Power in % of Rated S1 2F = Core Flow in % of Rated

[Flow > 50%

0.30 0 10 20 30 40 50 60 70 80 90 100 Core Thermal Power (% rated)

Figure 3b Page 16 of 29

Power Dependent MAPLHGR and MLHGR Multipliers (RPTOOS & TBVOOS) 1.10 1.00 85%:5; P < I !0.0%

0.90 60%:s P < 85.0% /

S. 40%!5 P <60 0.80 For P < 21.7% No Thermal Limits Required For 21.7%5 P < 26% and F< 50%

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

26% ! P < 40% /LHGRFAC(p) = 0.541 + 0.016047 x (P-26%)

Flow

  • 50%/  ! For 21.7% 5 P < 26% and F> 50%

.-J 0.70 MAPFAC(p) = 0.399 + 0.010698 x (P-26%)

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

e- For 26% s P < 40% and F r 50%

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

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

For 26% 5 P < 40% and F > 50%

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

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

4.

21.7%55 P < 26% I For 40%SP<60%

Flow 5 50%/ l MAPFAC(p) = 0.791 + 0.0052 x (P-60%)

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

For 60% 5 P < 85%

0.50 6I MAPFAC(p) = 0.887 + 0.00384 x (P-85%)

SFlow > 50% LHGRFAC(p) = 0.887 + 0.00384 x (P-85%)

I For 85%:5 P < 100%

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

LHGRFAC(p) = 1 + 0.007533 x (P-1 00%)

Where: P = Core Power in % of Rated 0.40 21.7%!5 P < 26% F = Core Flow in % of Rated Flow > 50%

0.30 0 10 20 30 40 50 60 70 80 90 100 Core Thermal Power (% rated)

Figure 3c Page 17 of 29

Flow Dependent MAPLHGR and MLHGR Multipliers 1.10 1.00 0.90 S

C.)

4 U- 0.80 C,

-J V

'U 0.70 C.)

4 LL 0~

4 0.60 0.50 0.40 0 10 20 30 40 50 60 70 80 90 100 110 Core Flow (% rated)

Figure 4 Page 18 of 29

Flow Dependent MAPLHGR and MLHGR Multipliers Single Loop Operation 1.10 1.00 0.90 0.80 IL 0.70 0.60 For F < 38.87%

MAPFAC(f) = 0.0067594 X F + 0.45722 LHGRFAC(f) = 0.0067594 X F + 0.45722 For F k 38.87%

MAPFAC(f) = 0.72 0.50 LHGRFAC(f) = 0.72 where: F = Core Flow in % of Rated 0.40 0 10 20 30 40 50 60 70 80 90 100 110 Core Flow (% rated)

Figure 5 Page 19 of 29

Power Dependent OLMCPR Limits and Multipliers (Equipment in Service or RPTOOS) 3.80 3.60 I ______________ I _______________ ~ II 21.7% < P < 26%

I _______________ I _________________________________________________________________________________

3.40 F F -i- Flow > 50%

For P < 21.7% No Thermal Limits Required For 21.7% 5 P < 26% and F!<50%

3.20 F 4 F-~--4 4 + OLMCPR(p) = 2.48 + 0.06977 x (26-P) i For 21.7% 9 P < 26% and F > 50%

OLMCPR(p) = 3.17 + 0.10465 x (26-P) 3.00 For 26% < P < 40% and F : 50%

0-C.) OLMCPR(p) = 1.9 4 0.01 x (40-P)

I I For 26% igP < 40% and F > 50%

C OLMCPR(p) = 2.11 + 0.017143 x (40-P) 2.80 For 40% -eP < 60%

K(p) = 1.177 + 0.0085 x (60-P) 21.7% ! P < 26% For 60%!5 P < 85%

K(p) = 1.068 + 0.00436 x (85-P) 2.60 - Flow S 50% For 85%:ý P < 100%

K(p) = I + 0.004533 x (100-P) 2.40 26%P< 4D% Where: OLMCPR(p) = Power Dependent OLMCPR Limit Flow > 50% K(p) = Power Dependent OLMCPR Multiplier P = Core Power in % of Rated 2.20 F = Core Flow in % of Rated l

I 2.00 F ~ + + -~ -4 4 F 1.80 i 26%<s P < 40%

Flow!5 50%

1.60

__40%<P<60%]

1.40 Note: Y-axis Numbers Represent 60% 5 P < 85.0%

(a) OLMCPR(p) for 21.7% < P <40% 85% < P < 100.0%

1.20 (b) K(p) for P ? 40%

1.00 0 10 20 30 40 50 60 70 80 90 100 Core Thermal Power (% rated)

Figure 6a Page 20 of 29

Power Dependent OLMCPR Limits and Multipliers (TBVOOS) 3.80 3.60 * [21.7%/ --P<26%/

Flow> 50%

3.40 For P < 21.7% No Thermal Limits Required For 21.7% 5 P < 26% and F:5 50%

3.20 OLMCPR(p) = 2.53 + 0.074419 x (26-P)

For 21.7% 5 P <26% and F > 50%

-a OLMCPR(p) = 3.19 + 0.1 x (26-P) 26% 5 P < 40% and F 5 50%

0~ 3.00 __For OLMCPR(p) = 1.9 + 0.01 x (40-P) 0 For 26% 5 P <40% and F > 50%

-J OLMCPR(p) = 2.11 + 0.017143 x (40-P) 0 2.80 For 40% 9 P <60%

K(p) = 1.177 + 0.0085 x (60-P) 21.7% < P < 26% For 60% S P < 85%

K(p) = 1.068 + 0.00436 x (85-P) 2.60 Flow!5 50% For 85%C P < 100%

K(p) = 1 + 0.004533 x (100-P) 2.40 26% ! P < 40% Where: OLMCPR(p) = Power Dependent OLMCPR Limit w 0% K(p) = Power Dependent OLMCPR Multiplier P = Core Power in % of Rated 2.20 F = Core Flow in % of Rated 2.00 L4 1o* P < 40%

1.80 ý 50%

Flow --

0.

1.60 I40%5*P< 60%

1.40 Note: Y-axis Numbers Represent .................. 50 (a) OLMCPR(p)for21.7%<*P<40% __85%_S_< 100.0%

1.20 (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 6b Page 21 of 29

Power Dependent OLMCPR Limits and Multipliers (RPTOOS & TBVOOS) 3.80 3.60 I I I 21.7% 5 P < 26%

3.40 Flow > 50%

I For P < 21.7% No Thermal Limits Required For 21.7% 5 P < 26% and F <50%

3.20 OLMCPR(p) = 2.53 + 0.074419 x (26-P)

-I For 21.7% <P < 26% and F > 50%

OLMCPR(p) = 3.19 + 0.1 x (26-P)

S ______ ______ I ______ ______ _____ For 26% <P < 40% and F 560%

3.00 OLMCPR(p) = 1.93 + 0.007857 x (40-P)

For 26% 5 P < 40% and F > 50%

-I OLMCPR(p) = 2.11 + 0.017143 x (40-P) 0 2.80 For 40%:s P <60%

I K(p) = 1.177 + 0.0085 x (60-P)

For 60% 5 P < 85%

21.7% 5 P < 26% K(p) = 1.068 + 0.00436 x (85-P) 2.60 Flow s 50% For 85% 5 P < 100%

K(p) = 1 + 0.004533 x (100-P)

I 2.40 26% < P < 40% Where: OLMCPR(p) = Power Dependent OLMCPR Limit

' Flow > 50%/ K(p) = Power Dependent OLMCPR Multiplier P = Core Power in % of Rated m i F = Core Flow in % of Rated 2.20 i 2.00 26% r. P < 40%

1.80 1 Flow s 50%

1.60 I -

40% :5 P < 60%

1.40 Note: Y-axis Numbers Represent 60%!ý P < 85.0%

(a) OLMCPR(p) for 21.7%:s P < 40% P < 100.0%

1.20 (b) K(p) for P ýt40% I L----------------------------

1.00 0 10 20 30 40 50 60 70 80 90 100 Core Thermal Power (% rated)

Figure 6c Page 22 of 29

Flow Dependent OLMCPR Limits 1.60 1.55 For 30%1 F < 90.4 %

OLMCPR(f) = - 0.00596 X F + 1.7388 For F a 90.4%

1.50 - OLMCPR(f) = 1.20 where: F = Core Flow in % of Rated 1.45 1.40 a.

o 1.35

-J 0

1.30 -

1.25 1.20 -

1.15 1 1.10 ,

0 10 20 30 40 50 60 70 80 90 100 110 Core Flow (% rated)

Figure 7 Page 23 of 29

OLMCPR vs Scram Time (Tau)

BOC to EOR - 3390 MWdlST Cycle Exposure Option B Option A 1.46 -

1.45 -

1.44 -

1.43 _

0.

-J 1.42 00000_

1.41 _

1.40 I 1.39 r 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Tau Figure 8 Page 24 of 29

OLMCPR vs Scram Time (Tau)

EOR - 3390 MWdIST to EOC Cycle Exposure Option B Option A 1.49 1.48 1.47 1.46 c-C.)

0 1.45 1.44 1.43 1.42 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Tau Figure 9 Page 25 of 29

OLMCPR vs Scram Time (Tau)

RPTOOS Option B Option A 1.62 1.60 1.58 1.56 1.54 C.)

,-I 0

1.52 1.50 1.48 1.46 1.44 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Tau Figure 10 Page 26 of 29

OLMCPR vs Scram Time (Tau)

TBVOOS Option B Option A 1.53 -

1.52 -

1.51 1.50 ______

U 0

1.49 1.48 1.47 1 i 1.46 _

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Tau Figure 11 Page 27 of 29

OLMCPR vs Scram Time (Tau)

RPTOOS & TBVOOS Option B Option A 1.66 1.64' 1.62 I 1.60 t ILI

= 1.58 t, 0

1.56 1.54 1.52 - te 1.50 -- .00 1.48 0 0 0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Tau Figure 12 Page 28 of 29

DAEC Power/Flow Map Cycle 25 - 1912 MWth 110 2100 2000 Exclusion Region -I-Ft-I-- I iI I I I 100 1900 Buffer Region MELLLA Limit (100.64%) 1800

-1___. *--I -

NOTE: Continued operation above the MELLLA 90 limit or beyond the core flow limit is not allowed. 1700 Take action to exit the region immediately.

1600 80 NOTE: The Natural Circulation Line and Minimum Pump Speed Line are "best estimates" 1500 as opposed to boundaries inthe power flow map. 96% Load Linet 1400,-*

  • 70 1300 II , I- r -I I i I 89.86% Load Line 1200 60 1100 0.

0 1000 0 50 0 ,I1 900 800 2 40 0 0 I I C.)

I - i i 700 W- --I-- Core Flow Limit (51.45 MIb/hr) 600 30 Pu IS I I 500 Pump Speed 20 I[I__II 400

- Natural Circulation Line -L 300 10 Low FW Protection Line 200 I/ l1 i I-- --- I--4-----I----~----H-----I--- -I------ I - ---- t - I - I- f -

V , 1 1 I I I I I I i I I  !

100 0 0 0 5 10 15 20 25 30 35 40 45 50 55 Core Flow (Mlblhr)

Figure 13 Page 29 of 29

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