L-MT-11-034, Core Operating Limits Report for Cycle 26

Core Operating Limits Report for Cycle 26

ML111920075
Person / Time
Site:	Monticello
Issue date:	07/08/2011
From:	O'Connor T Northern States Power Co, Xcel Energy
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
L-MT-11-034
Download: ML111920075 (46)

Text

Monticello Nuclear Generating Plant 2807 W County Road 75 Monticello, MN 55362 July 8, 201 1 L-MT-11-034 10 CFR 50.4 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555 Monticello Nuclear Generating Plant Docket 50-263 Renewed Facility Operating License No. DPR-22 Core Operating Limits Report for Cvcle 26 In accordance with Monticello Nuclear Generating Plant (MNGP) Technical Specification 5.6.3, "Core Operating Limits Report (COLR)," the Northern States Power Company - a Minnesota corporation (NSPM), doing business as Xcel Energy, is providing the COLR for Cycle 26. The COLR provides the cycle-specific values sf the limits established using NRC approved methodologies such that the applicable limits of the plant safety analysis are met. The Cycle 26 COLR for the MNGP is provided in .

If you have any questions or require additional information, please contact Mr. Richard Loeffler at (763) 295-1247.

Summaw of Commitments commitments and does not revise any existing sident, Monticello Nuclear Generating Plant pany - Minnesota Enclosure cc: Regional Administrator, Region Ill, USNRC Project Manager, Monticello Nuclear Generating Plant, USNRC Resident Inspector, Monticello Nuclear Generating Plant, USNRC Minnesota Department of Commerce

ENCLOSURE 1 MONTICELLO NUCLEAR GENERATING PLANT CYCLE 26 CORE OPERATING LIMITS REPORT NAD-MN-025, REVISION 0

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Monticello Nuclear Generating Plant Cycle 26 Core Operating Limits Report Revision 0 Prepared By: y&h Date: 3-25? //

Date: 3/ ZS/ 20 /I Senior Engineer, Nuclear Analysis and Design Reviewed By: ~.@au6=&p T' EricKn* Date: 3I28!~~\\

Todd S. Erickson Supervisor, Reactor Engineering - Monticello Approved By: Date: L/-d-d/

Supervisor, Nuclear Analysis and Design NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 1 of 44

1.0 Core Operating Limits Report (COLR)

This Core Operating Limits Report for Monticello Nuclear Generating Plant (MNGP)

Cycle 26 is prepared in accordance with the requirements of Technical Specification 5.6.3. The core operating limits are developed using NRC approved methodology (References 1, 3, 4, and lo), and are established such that all applicable thermal limits of the plant safety analysis are met.

The SLMCPR of I. 15 was used for two-loop operation for all fuel types in Cycle 26. The SLMCPR for single loop operation is 1.15. These values are consistent with the values specified in Reference 2.

This report includes the Option Ill Modified Shape Function (MSF) definition for the Backup Stability Protection (BSP) region, which is used in providing backup thermal hydraulic stability protection when the Option Ill OPRM system is declared INOPERABLE.

Figure 4, which shows the flow-dependent CPR limits, is now bounded by the ECCS MCPR value as specified in Reference 2.

2.0 References 1.0 General Electric Standard Application for Reactor Fuel (GESTAR-II), NEDE-24011-P-A-17, September 2010.

2.0 Supplemental Reload Licensina Report for Monticello Reload 25, Cycle 26, 0000-0118-4010-SRLR, Revision 1, March 2011.

3.0 General Electric Licensing Topical Report ODYSY Application for Stability Licensinq Calculations, NEDC-32992-P-A, DRF A13-00426-00, July 2001.

4.0 Reactor Stability Detect and Suppress Solutions Licensing Basis Methodologv for Reload Applications, Licensing Topical Report, NEDO-32465-A, August 1996.

5.0 Fuel Bundle Information Report for Monticello, Reload 25, Cycle 26, 0000-01 18-4010-FBIR, Revision 0, February 201 1.

6.0 Letter from M. F. Hammer (NSP) to USNRC dated December 4 1997, Revision Ito License Amendment Request dated July 26, 1996 Supportinq the Monticello Nuclear Generatina Plant Rerate Program, including attached exhibits.

7.0 Document GE14 Fuel Desiqn Cycle-IndependentAnalysis for Monticello Nuclear Generatinq Plant, GE-NE-0000-0013-9576P, GE Nuclear Energy (Proprietary),

March 2003.

8.0 Letter from Les Conner (GNF) to R. J. Rohrer (NMC), dated March 24, 2003, Monticello Option B Licensing Basis, IC.MN.2003.010, Global Nuclear Fuel.

9.0 GE14 Fuel Desiqn, Cycle Independent Transient Analvsis for Monticello Nuclear Generating Plant, GE-NE-0000-0014-7048-01P, Rev. 0, March 2003 (GNF Proprietary).

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 2 of 44

10.0 BWR Owners Group Lonq Term Stabilitv Solution Licensinq Methodologv, NEDO-31960-A, Licensing Topical Report, November 1995 (including Supplement 1).

11.0 Reactor Lonq-Term Stabilitv Solution Option Ill: Licensing Basis Hot Channel Oscillation Maqnitude for Monticello Nuclear Generatinq Plant, GHNE-0000-0073-4167-R2, December 2007.

12.0 Plant-Specific Reqional Mode DIVOM Procedure Guideline, GE-NE-0000-0028-9714-R1, June 2005.

13.0 Backup Stabilitv Protection (BSP) for Inoperable Option Ill Solution, OG-02-0119-260, July 2002.

14.0 Letter from M. F. Hammer (NSP) to USNRC dated July 30, 1998, "Supplementary Information Regarding the Monticello Power Rerate (TAC No. 96238)", including attachments.

15.0 Letter from Tae Kim (USNRC) to Roger 0 Anderson (NSP), "Monticello Nuclear Generating Plant - Issuance of Amendment Re. Power Uprate Program (TAC No.

M96238)," including enclosures, September 16, 1998.

16.0 Not used.

17.0 Not used.

18.0 Not used.

19.0 Not used.

20.0 Not used.

21.0 Not used.

22.0 Not used.

23.0 Calculation CA-08-051, Rev 0, Instrument Setpoint Calculation - Rod Block Monitor (RBM) PRNM Setpoints for CLTP and EPU Operation.

24.0 GE BWR Licensing Report, Average Power Ranqe Monitor, Rod Block Monitor, and Technical Specification Improvement (ARTS) Proaram for Monticello Nuclear Generation Plant, NEDC-30492-P, Section 4, April 1984.

25.0 GE Services Information Letter, Backup Pressure Regulator, GE SIL No. 614 Revision 1, March 15, 1999.

26.0 Nuclear Management Company Monticello Nuclear Generatinq Plant Pressure Regulator Downscale Failure Analvsis, GE-NE-0000-0051-2643-R0, September 2007.

NAD-MN-025, Monticeilo Cycle 26 COLR, Revision 0 Page 3 of 44

27.0 Letter from Peter S. Tam (USNRC) to Timothy J. O'Connor (Northern States Power Company), "Monticello Nuclear Generating Plant (MNGP) - Issuance Of Amendment Regarding The Power Range Neutron Monitoring System (TAC No.

MD8064)," dated January 30, 2009.

28.0 Not used.

29.0 Fuel Bundle Information Report for Monticello Reload 24 Cycle 25, 0000-0083-9607-FBIR, Revision 0, January 2009.

30.0 Supplemental Reload Licensing Report for Monticello Reload 24, Cvcle 25, 0000-0083-9607-SRLR, Revision 1, March 2009.

31.0 Monticello Nuclear Generatinq Plant, Cvcle 25 Core Operatina Limits Report. NAD-MN-020, Revision 0, March 2009.

32.0 Letter from D. Musolf (NSP) to Director, Office of Nuclear Reactor Regulation, NRC "Revision Ito License Amendment Request Dated September 7, 1976, Single Loop Operation" dated July 2, 1982.

33.0 ODYSY Application for Stabilitv Licensinq Calculations lncludinq Option I-D and I1 Lonq Term Solutions, Licensing Topical Report, NEDE-33213P-A, April 2009.

3.0 Rod Block Monitor Operability Requirements The ARTS Rod Withdrawal Error (RWE) analysis (Reference 2) validated that the following MCPR values provide the required margin for full withdrawal of any control rod during Monticello Cycle 26:

For Power < 90%: MCPR 2 1.83 For Power 2 90%: MCPR r 1.50 When the core power is less than 90% of rated and the MCPR is less than 1.83, then a limiting control rod pattern exists and the Rod Block Monitor is required to be operable. If the core power is greater than or equal to 90% and the MCPR is less than 1.50, then a limiting control rod pattern exists and the Rod Block Monitor is required to be operable.

Reference:

Technical Specification Table 3.3.2.1-1 Function 1.

4.0 Rod Block Monitor Upscale Trip Setpoint 4.1 Technical Specification Trip Setpoints and Allowable Values Function Trip Setpoint Allowable Values Low Power Range - Upscale (a) I 1201125 of full scale r 120.41125 of full scale Intermediate Power Range - Upscale (b) r I151125 of full scale r 115.41125 of full scale High Power Range - Upscale (c), (d) r 1101125 of full scale r 110.41125 of full scale Applicable Thermal Power (a) Thermal Power 2 30% and < 65% RTP and MCPR is below the limit specified in Section 3.

(b) Thermal Power 2 65% and < 85% RTP and MCPR is below the limit specified in Section 3.

(c) Thermal Power 2 85% and e 90% RTP and MCPR is below the limit specified in Section 3.

(d) Thermal Power r 90% RTP and MCPR is below the limit specified in Section 3.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 4 of 44

Reference:

Technical Specification Table 3.3.2.1-1 Functions 1.a, 1.b, and 1.c.

The Reference for the "Trip Setpoints" and "Allowable Values" is Reference 23.

5.0 Minimum Critical Power Ratio (MCPR) 5.1 Option A The Operating Limit Minimum Critical Power Ratio (OLMCPR) for Option A does not account for scram speeds that are faster than those required by Technical Specifications.

5.1 .IOption A OLMCPR for Two Recirculation Loop Operation The Option A OLMCPR shall be determined for two recirculation loop operation as follows:

If core thermal power (P) is 2 45% of rated core thermal power, then the Option A OLMCPR for all fuel types is the greater of { I .77

• K(P) from Figure 3) or {MCPR(F) from Figure 41, where 1.77 is the Option A OLMCPR at rated (100%) core thermal power reported in Table 29.

i.e. if P r 45% rated core thermal power, then Option A OLMCPR limit

= Maximum of 1.77 * {K(P) from Figure 3) or {MCPR(F) from Figure 4).

If core thermal power (P) is < 45% of rated core thermal power, the Option A OLMCPR for all fuel types is obtained from Figure 3.

Reference:

Technical Specification Section 3.2.2.

5.1.2 Option A OLMCPR for Single Recirculation Loop Operation The Option A OLMCPR as defined above for two recirculation loop operation in Section 5.1.1 is the same OLMCPR to be used for single recirculation loop operation.

Reference:

Technical Specification Section 3.2.2.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 5 of 44

5.2 Option B Option B does take into account the measured scram speeds that are faster than the Technical Specification requirements, thus reducing the potential consequences of a limiting transient. Calculation of the Option B OLMCPR value as a function of measured scram speeds is described in Section 10.

5.2.1 Option B OLMCPR for Two Recirculation Loop Operation The Option B OLMCPR shall be determined for two recirculation loop operation as follows:

The rated (100%) core thermal power Option B OLMCPR (OLMCPR:;~ ) is 1.60, and is reported in Table 29. This OLMCPR:;~ of 1.60 is modifled as described in Section 10 to be a function of the measured scram speeds to yield OLMCPR:,"~~ .

Then, if core thermal power (P) is 2 45% of rated core thermal power, the Option B OLMCPR for all fuel types is the greater of:

OLMCPR:;~~ * {K(P) from Figure 3) or {MCPR(F) from Figure 4).

i.e. if P 145% rated core thermal power, then Option B OLMCPR limit

= Maximum of {OLMCPR:~;~

• K(P) from Figure 3) or {MCPR(F) from Figure 4).

If core thermal power (P) is < 45% of rated core thermal power, the Option B OLMCPR for all fuel types is obtained from Figure 3.

Reference:

Technical Specification 3.2.2.

5.2.2 Option B OLMCPR for Single Recirculation Loop Operation The Option B OLMCPR as defined above for two recirculation loop operation in Section 5.2.1 is the same OLMCPR to be used for single recirculation loop operation.

Reference:

Technical Specification 3.2.2.

5.3 Pressure Regulator Out of Service (PROOS) Operation Reference 25 GE SIL 614, Revision Idescribes the impact of operation without a backup

/ pressure regulator (also called PROOS). This section provides power dependent MCPR limits when a backup pressure regulator is not operational.

The existing power dependent MAPLHGR and LHGR limits described in Sections 8.1 and 8.2 have been found to be valid (bounding) for operation without a backup pressure regulator (References 26 and 2).

A Pressure Regulator Fails Down-Scale (PRFDS) event without backup pressure regulator was evaluated for Monticello (Reference 26). This event resulted in a more restrictive Power Dependent MCPR limit than required for normal reduced power operation with both pressure regulators operational. This event was re-evaluated for Cycle 26 (Reference 2) and determined to be more restrictive than the results in Reference 26. Figure 8 provides the required more restrictive power dependent MCPR NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 6 of 44

ARTS limits for powers below 85% and greater than or equal to 45%. For powers greater than or equal to 85% or below 45%, the power dependent MCPR and K(P) ARTS limits provided in Figure 3 are still valid. The ARTS limits are described in Reference 24. The new Pressure Regulator Out of Service limits are applicable for Cycle 26 (Reference 2).

Figure 8 combines the unchanged limits from Figure 3 along with the more restrictive limits determined in Reference 2 for PROOS operation. Figure 8 should only be used for operation without a backup pressure regulator. Figure 8 is valid for both Option A and Option B OLMCPR limits.

An interim MFLCPR Limit is provided in Figure 9. This limit should only be used if the Gardel thermal limit input has not been modified as described in Sections 5.3.1 or 5.3.2 to account for pressure regulator out of service operation. I.e., only Figure 8 or Figure 9 should be used to provide the appropriate PROOS limit. These figures should not be utilized in combination.

5.3.1 OLMCPR for Two Recirculation Loop Operation, WITHOUT A BACKUP PRESSURE REGULATOR.

The Option A or B OLMCPR shall be determined for two recirculation loop operation as follows:

The Option A OLMCPR is calculated as shown below for the Option B example with the following exception:

The O L M C P R ~ ; ~ is

~ replaced with the Option A OLMCPR of 1.77.

The Option B OLMCPR is calculated as follows:

The rated (100%) core thermal power Option B OLMCPR (OLMCPR~~~,) is 1.60, and is reported in Table 29. This OLMCPR~~~, of 1.60 is modified as described in Section 10 to be a function of the measured scram speeds to yield OLMCPR~,"~, .

Then, if core thermal power (P) is 185% of rated core thermal power, the Option B OLMCPR for all fuel types is the greater of:

OLMCPR~,"~, * {K(P) from Figure 8) or {MCPR(F) from Figure 4).

i.e. if P 185% rated core thermal power, then Option B OLMCPR limit

= Maximum of {oLMcPR~,"~~",~

• K(P) from Figure 8) or {MCPR(F) from Figure 4).

If core thermal power (P) is < 85% of rated core thermal power, the OLMCPR for all fuel types is obtained from Figure 8.

NAD-MN-025, Monticello Cycle 26 COLR,Revision 0 Page 7 of 44

5.3.2 OLMCPR for Single Recirculation Loop Operation, WITHOUT A BACKUP PRESSURE REGULATOR The Option A or B OLMCPR as defined previously for two recirc.ulation loop operation in Section 5.3.1 is the same OLMCPR to be used for single recirculation loop operation:

6.0 Power-Flow Map The Power-Flow Operating Map based on analysis to support Cycle 26 is shown in Figures 5, and 6. The Power-Flow Operating Map is consistent with a rated power of 1775 MWth as described in References 6, 14, and 15.

7.0 Approved Analytical Methods NEDE-24011-P-A Rev. 17 "General Electric Standard Application for Reactor Fuel IGESTAR)"

NEDE-24011-P-A-US Rev. 17 "General Electric Standard Application for Reactor Fuel IGESTAR) - Supplement for the United States."

NEDO-31960-A "BWR Owners Group Long-Term Stability Solution Licensing Methodoloqy," Licensing Topical Report, June 1991.

NEDO-31960-A Sup. 1 "BWR Owners Group Lonq-Term Stability Solution Licensing Methodology, (Supplement I)," Licensing Topical Report, Supplement I , March 1992.

NEDC-32992P-A General Electric Licensing Topical Report, "ODYSY Application for Stability Licensing Calculations," July 2001.

NEDO-32465-A General Electric Licensing Topical Report, "Reactor Stability Detect and Suppress Solutions Licensing Basis Methodology and Reload Applications." August 1996.

NSPNAD-8608-A Rev. 4 "Reload Safety Evaluation Methods for Application to the Monticello Generatinq Plant." October 1995.

NSPNAD-8609-A Rev. 3 "Qualification of Reactor Physics Methods for Application to Monticello," October 1995.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 8 of 44

8.0 Fuel Rod Heat Generation Rate 8.1 Maximum Average Planar Linear Heat Generation Rate (MAPLHGR) as a Function of Exposure The MAPLHGR limits in Tables I through 12 are conservative values bounding all fuel lattice types (all natural uranium lattices are excluded) in a given fuel bundle design, and are intended only for use in hand calculations as described below to establish MAPLHGR limits for Technical Specification 3.2.1. No channel bow effects are included in the bounding MAPLHGR values in Tables 1 through 12 as there are no reused channels.

MAPLHGR limits for each individual fuel lattice for a given bundle design as a function of axial location and average planar exposure are determined based on the approved methodology referenced in Monticello Technical Specification 5.6.3.b and are loaded into the process computer for use in core monitoring calculations.

When and if hand calculations are required:

8.1 .I Two-Recirculation Loop Operation (MAPLHGR)

At rated core thermal power and core flow conditions, the MAPLHGR limit for each fuel bundle design as a function of average planar exposure shall not exceed the bounding limits provided in Tables 1 through 12.

The MAPLHGR limit is adjusted for off-rated core thermal power and core flow conditions by determining the following:

MAPLHGR(P) = MAPFAC(P)

• MAPLHGR limit from Tables 1 through 12.

MAPLHGR(F) = MAPFAC(F)

• MAPLHGR limit from Tables Ithrough 12.

where MAPFAC(P) and MAPFAC(F) are determined from Figures 1 and 2, respectively, and where P is the core thermal power in percent of rated, and F is the core flow in percent of rated.

The Technical Specification (TS) MAPLHGR limit is determined as follows:

MAPLHGR (TS) Limit = Minimum{MAPLHGR(P), MAPLHGR(F))

Note that all natural uranium lattices are excluded in Tables 1 through 12.

Straight line interpolation between nearest data points is permitted only within each individual Tables 1 through 12.

8.1.2 Single Recirculation Loop Operation (MAPLHGR)

When in single recirculation loop operation, perform the following:

8.1.2.1 Perform the action specified in Section 8.1 .Iabove.

8.1.2.2 Separately, apply the single loop operation multiplier to the limiting values of MAPLHGR from Tables Ithrough 12 as follows:

for GE14C: multiplier is 0.90.

8.1.2.3 Select the more limiting (i.e. smaller) value from Sections 8.1.2.1 or 8.1.2.2.

Reference:

Technical Specification 3.2. I.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 9 of 44

8.2 Linear Heat Generation Rate (LHGR)

The uranium dioxide ( U 0 2 ) and gadolinia LHGR limits as a function of fuel rod peak pellet exposure for each bundle type in Cycle 26 is provided in Tables 13 through 24. The gadolinia LHGR limits in Tables 13 through 24 are bounding gadolinia LHGR limits for all the gadolinia concentrations occurring in each of the bundle types used in Cycle 26. The LHGR limits are fuel rod nodal limits, and are to be applied at every node of the fuel rod including the natural uranium lattices.

The individual LHGR limits for the uranium dioxide and gadolinia fuel rods in each fuel bundle type used in Cycle 26, as a function of axial location and pellet exposure are determined based on the approved methodology referenced in Monticello Technical Specification 5.6.3.b and are loaded into the process computer for use in core monitoring calculations.

The LHGR limits are presented in this report for use when and if hand calculations are performed to demonstrate compliance with Technical Specification 3.2.3.

When and if hand calculations are performed:

8.2.1 Two-Recirculation Loop Operation (LHGR)

At rated core thermal power and core flow conditions, the LHGR limit for each fuel bundle design as a function of peak pellet exposure and fuel pin type shall not exceed the bounding limits provided in Tables 13 through 24.

The LHGR limit is adjusted for off-rated core thermal power and core flow conditions by determining the following:

LHGR(P) = MAPFAC(P)

• LHGR limit from Tables 13 through 24.

LHGR(F) = MAPFAC(F)

• LHGR limit from Tables 13 through 24.

where the multipliers MAPFAC(P) and MAPFAC(F) are determined from Figures 1 and 2, respectively, and where P is the core thermal power in percent of rated, and F is the core flow in percent of rated.

The Technical Specification (TS) LHGR limit is determined as follows:

LHGR TS Limit = Minimum{LHGR(P), LHGR(F))

Note that the LHGR limits are fuel rod nodal limits, and are to be applied at every node of the fuel rod, including the natural uranium lattices. Straight line interpolation between nearest data points is permitted only within each individual Tables 13 through 24.

8.2.2 Single Recirculation Loop Operation (LHGR)

When in single recirculation loop operation, perform the following:

8.2.2.1 Perform the same action specified in Section 8.2.1 above. There are no separate single loop operation specific multipliers applicable to LHGR, i.e. the multipliers from Section 8.2.1 also apply to single recirculation loop operation.

Reference:

Technical Specification Section 3.2.3.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 10 of 44

Table 1 MAPLHGR Limits (I)

Average Planar Exposure MAPLHGR Limit GWDlMTU (GWDISTU) (k~lft)'~'

0.00 ( 0.00) 8.21 0.22 ( 0.20) 8.26 1.10 ( 1.00) 8.35 2.20 ( 2.00) 8.47 3.31 ( 3.00) 8.59 4.41 ( 4.00) 8.71 5.51 ( 5.00) 8.84 6.61 ( 6.00) 8.97 7.72 ( 7.00) 9.1 1 8.82 ( 8.00) 9.23 9.92 ( 9.00) - - 9.35 11.02 (10.00) 9.47 12.13 (11.00) 9.59 13.23 (12.00) 9.70 14.33 (13.00) 9.80 15.43 (14.00) 9.90 16.53 (15.00) 9.98 18.74 (17.00) 9.97 22.05 (20.00) 9.96 27.56 (25.00) 9.94 33.07 (30.00) 9.84 38.58 (35.00) 9.24 41.33 (37.49) 8.95 44.09 (40.00) 8.67 49.60 (45.00) 8.13 55.1,2 (50.00) 7.62 60.63 (55.00) 6.26 63.50 (57.61) 4.94 63.59 (57.68) 4.90 63.72 (57.81) 4.89 64.46 (58.48) 4.90 64.49 (58.50) 4.89 Notes:

(I)Values in Table 1 are for two recirculation loop operation, see Section 8.1.1.

For single loop operation, see Section 8.1.2 (2) Engineering Data Bank (EDB) number, Reference 30.

(3) MAPLHGR Data, Reference 30.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 11 of 44

Table 2 MAPLHGR Limits (I)

Average Planar Exposure MAPLHGR Limit GWDIMTU (GWDISTU) (k~lft)'~)

0.00 ( 0.00) 8.33 0.22 ( 0.20) 8.37 1.10 ( 1.00) 8.44 2.20 ( 2.00) 8.54 3.31 ( 3.00) 8.63 4.41 ( 4.00) 8.73 5.51 ( 5.00) 8.84 6.61 ( 6.00) 8.93 7.72 ( 7.00) 9.02 8.82 ( 8.00) 9.1 1 9.92 ( 9.00) - - -- - 9.21

-- 11.0~0.00) 9.32 12.13 (11.00) 9.44 13.23 (12.00) 9.56 14.33 (13.00) 9.50 15.43 (14.00) 9.50 16.53 (15.00) 9.52 18.74 (17.00) 9.54 22.05 (20.00) 9.56 27.56 (25.00) 9.60 33.07 (30.00) 9.41 38.58 (35.00) 8.91 41.33 (37.49) 8.67 44.09 (40.00) 8.43 49.60 (45.00) 7.90 55.12 (50.00) 7.39 60.63 (55.00) 5.79 63.16 (57.30) 4.68 63.50 (57.61) 4.84 63.59 (57.68) 4.91 63.72 (57.81) 4.90 63.76 (57.85) 4.73 Notes:

(') Values in Table 2 are for two recirculation loop operation, see Section 8.1.I.

For single loop operation, see Section 8.1.2

()' Engineering Data Bank (EDB) number, Reference 30.

(3) MAPLHGR Data, Reference 30.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 12 of 44

Table 3 MAPLHGR Limits (I' GEl4C EDB-2931'" GEI 4-PI ODNAB392-16GZ-100T-145-T6-2931 Average Planar Exposure MAPLHGR Limit GWDIMTU (GWDISTU) (k~lft)(~'

0.00 ( 0.00) 8.32 0.22 ( 0.20) 8.36 1.10 ( 1.00) 8.43 2.20 ( 2.00) 8.52 3.31 ( 3.00) 8.62 4.41 ( 4.00) 8.72 5.51 ( 5.00) 8.82 6.61 ( 6.00) 8.92 7.72 ( 7.00) 9.00 8.82 ( 8.00) 9.09 P

9.92 ( 9.00) 9.19 11.02 (10.00) 9.31 12.13 (11.00) 9.43 13.23 (12.00) 9.55 14.33 (13.00) 9.50 15.43 (14.00) 9.49 16.53 ( I 5.00) 9.51 18.74 (17.00) 9.53 22.05 (20.00) 9.55 27.56 (25.00) 9.60 33.07 (30.00) 9.41 38.58 (35.00) 8.90 41.33 (37.49) 8.67 44.09 (40.00) 8.43 49.60 (45.00) 7.90 55.12 (50.00) 7.38 60.63 (55.00) 5.78

63. I3 (57.27) 4.68 63.50 (57.61) 4.83 63.54 (57.65) 4.91 63.68 (57.77) 4.91 63.73 (57.82) 4.73 Notes:

(I)Values in Table 3 are for two recirculation loop operation, see Section 8.1 .I.

For single loop operation, see Section 8.1.2

()' Engineering Data Bank (EDB) number, Reference 30.

(3) MAPLHGR Data, Reference 30.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 13 of 44

Table 4 MAPLHGR Limits ('I GEGCEDB-2932") GE14-PI ODNAB392-17GZ-100T-145-T6-2932 Average Planar Exposure MAPLHGR Limit GWDIMTU (GWDISTU) (k~lft)'~'

0.00 ( 0.00) 8.20 0.22 ( 0.20) 8.24 1.10 ( 1.00) 8.34 2.20 ( 2.00) 8.45 3.31 ( 3.00) 8.58 4.41 ( 4.00) 8.70 5.51 ( 5.00) 8.83 6.61 ( 6.00) 8.96 7.72 ( 7.00) 9.10 8.82 ( 8.00) 9.21 9.92 ( 9.00) 9.33 11.02 (10.00) 9.46 12.13 (11.00) 9.58 13.23 (12.00) 9.69 14.33 (13.00) 9.80 15.43 (14.00) 9.89 16.53 (15.00) 9.97 18.74 (17.00) 9.96 22.05 (20.00) 9.95 27.56 (25.00) 9.93 33.07 (30.00) 9.82 38.58 (35.00) 9.22 41.33 (37.49) 8.94 4.93 4.90 63.70 (57.79) 4.89 64.44 (58.46) 4.90 64.48 (58.50) 4.89 Notes:

(') Values in Table 4 are for two recirculation loop operation, see Section 8.1 .I.

For single loop operation, see Section 8.1.2

()' Engineering Data Bank (EDB) number, Reference 30.

(3) MAPLHGR Data, Reference 30.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 14 of 44

Table 5 MAPLHGR Limits ( I )

GE14C EDB-3100'~' GE14-PI ODNAB424-14GZ-1OOT-I 45-T6-3100 Average Planar Exposure MAPLHGR Limit GWDIMTU (GWDISTU) (k~lfi)'~'

0.00 ( 0.00) 7.65 0.22 ( 0.20) 7.72 1.10 ( 1.00) 7.81 2.20 ( 2.00) 7.93 3.31 ( 3.00) 8.05 4.41 ( 4.00) 8.15 5.51 ( 5.00) 8.25 6.61 ( 6.00) 8.36 7.72 ( 7.00) 8.46 8.82 ( 8.00) 8.57 9.92 ( 9.00) 8.69 11.02 (10.00) 8.80 12.13 (11.00) 8.92 13.23 (12.00) 9.04 14.33 (13.00) 9.1 1 15.43 (14.00) 9.17 16.53 (15.00) 9.25 17.64 (16.00) 9.33 18.74 (17.00) 9.42 19.84 (18.00) 9.51 20.94 (19.00) 9.59 22.05 (20.00) 9.67 23.15 (21.00) 9.74 9.49 38.58 (35.00 9.09 41.33 (37.49) 8.87 44.09 (40.00) 8.66 49.60 (45.00) 8.18 55.12 (50.00) 7.45 60.63 (55.00) 4.97 60.90 (55.25) 4.85 60.96 (55.30) 4.85 62.80 (56.97) 4.93 63.16 (57.30) 4.95 Notes:

(') Values in Table 5 are for two recirculation loop operation, see Section 8.1.1.

For single loop operation, see Section 8.1.2 (2) Engineering Data Bank (EDB) number, Reference 30.

(3) MAPLHGR Data, Reference 30.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 15 of 44

Table 6 MAPLHGR Limits (I)

Average Planar Exposure MAPLHGR Limit GWDlMTU (GWDISTU) (kwlft)"

Notes:

(I) Values in Table 6 are for two recirculation loop operation, see Section 8.1.1 For single loop operation, see Section 8.1.2

. (') Engineering Data Bank (EDB) number, Reference 30.

(3) MAPLHGR Data, Reference 30.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 16 of 44

Table 7 MAPLHGR Limits (I)

Average Planar Exposure MAPLHGR Limit GWDIMTU (GWDISTU) (k~lft)'~'

0.00 ( 0.00) 8.33 0.22 ( 0.20) 8.37 1.10 ( 1.00) 8.44 2.20 ( 2.00) 8.53 3.31 ( 3.00) 8.63 4.41 ( 4.00) 8.73 5.51 ( 5.00) 8.83 6.61 ( 6.00) 8.92 7.72 ( 7.00) 9.00 8.82 ( 8.00) 9.09 9.92 ( 9.00) 9.19 11.02 (10.00) 9.30 12.13 (11.00) 9.42 13.23 (12.00) 9.51 14.33 (13.00) 9.44 15.43 (14.00) 9.44 16.53 (15.00) 9.47 17.64 (16.00) 9.50 18.74 (17.00) 9.52 19.84 (18.00) 9.53 20.94 (19.00) 9.54 23.1 5 (21.OO) 9.56 24.25 (22.00) 9.57 25.35 (23.00) 9.57 26.46 (24.00) 9.59 27.56 (25.00) 9.60 33.07 (30.00) 9.39 38.58 (35.00) 8.89 41.33 (37.49) 8.65 44.09 (40.00) 8.41 49.60 (45.00) 7.95 55.12 (50.00) 7.46 60.63 (55.00) 5.71 63.00 (57.16) 4.67 63.41 (57.53) 4.90 63.50 (57.61) 4.79 63.52 (57.62) 4.79 63.66 (57.75) 4.72 Notes:

'I' Values in Table 7 are for two recirculation loop operation, see Section 8.1.I.

For single loop operation, see Section 8.1.2

()' Engineering Data Bank (EDB) number, Reference 30.

(3) MAPLHGR Data, Reference 30.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 17 of 44

Table 8 MAPLHGR Limits (I)

Average Planar Exposure MAPLHGR Limit GWDIMTU (GWDISTU) (k~ l f t ) ' ~ '

Notes:

'I' Values in Table 8 are for two recirculation loop operation, see Section 8.1 .I.

For single loop operation, see Section 8.1.2

"' Engineering Data Bank (EDB) number, Reference 30.

'3' MAPLHGR Data, Reference 30.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 18 of 44

Table 9 MAPLHGR Limits ( I )

Average Planar Exposure MAPLHGR Limit GWDIMTU (GWDISTU) (k~lft)'~'

0.00 (0.00) 8.15 0.22 (0.20) 8.20 1.10 (1.00) 8.28 2.20 (2.00) 8.35 3.31 (3.00) 8.41 4.41 (4.00) 8.48 5.51 (5.00) 8.54 6.61 (6.00) 8.61 7.72 (7.00) 8.68 8.82 (8.00) 8.76 9.92 (9.00) 8.85 1I.02 (10.00) 8.95 12.13 (11.00) 9.07 13.23 (12.00) 9.19 14.33 (13.00) 9.31 15.43 (14.00) 9.43 16.53 (15.00) 9.53 17.64 (16.00) 9.63 18.74 (17.00) 9.63 19.84 (18.00) 9.62 20.94 (19.00) 9.63 22.05 (20.00) 9.64 23.15 (21.00 9.65 24.25 22.00 25.35 23.00 26.46 24.00 27.56 25.00 33.07 30.00 38.58 35.00 9.00 41.33 (37.49) 8.73 44.09 (40.00) 8.45 49.60 (45.00) 7.93 55.1 2 (50.00) 7.43 60.63 (55.00) 5.38 61.77 (56.04) 4.86 61.83 (56.09) 4.86 63.07 (57.22) 4.85 63.1 I(57.25) 4.84 Notes:

I Values in Table 9 are for two recirculation loop operation, see Section 8.1 . I For single loop operation, see Section 8.1.2

()' Engineering Data Bank (EDB) number, Reference 2.

(3) MAPLHGR Data, Reference 2.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 19 of 44

Table 10 MAPLHGR Limits (I)

Average Planar Exposure MAPLHGR Limit GWDIMTU (GWDISTU) (k~lf%)'~'

0.00 (0.00) 8.35 0.22 (0.20) 8.39 1.10 (1.00) 8.45 2.20 (2.00) 8.53 3.31 (3.00) 8.61 4.41 (4.00) 8.69 5.51 (5.00) 8.78 6.61 (6.00) 8.87 7.72 (7.00) 8.96 8.82 (8.00) 9.06 9.92 (9.00) 9.14 1I.02 (10.00) 9.23 12.13 (11.00) 9.32 13.23 (12.00) 9.42 14.33 (13.00) 9.54 15.43 (14.00) 9.66 16.53 (15.00) 9.77 17.64 (16.00) 9.88 18.74 (17.00) 9.92 19.84 (18.00) 9.92 20.94 (19.00) 9.91 22.05 (20.00) 9.90 24.25 (22.00) 9.87 26.46 (24.00) 9.86 27.56 (25.00) 9.85 33.07 (30.00) 9.85 38.58 (35.00) 9.29 41.33 (37.49) 9.03 44.09 (40.00) 8.78 49.60 (45.00) 8.28 55.12 (50.00) 7.74 60.63 (55.00) 6.14 63.36 (57.48) 4.89 63.50 (57.61) 4.89 63.51 (57.62) 4.89 64.05 (58.1I ) 4.89 64.10 (58.15) 4.87 Notes:

(') Values in Table 10 are for two recirculation loop operation, see Section 8.1. I .

For single loop operation, see Section 8.1.2

(*) Engineering Data Bank (EDB) number, Reference 2.

(3) MAPLHGR Data, Reference 2.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 20 of 44

Table I 1 MAPLHGR Limits (I)

Average Planar Exposure MAPLHGR Limit GWDIMTU (GWDISTU) (k~lft)'~)

0.00 (0.00) 8.22 0.22 (0.20) 8.27 1.10 (1.00) 8.36 2.20 (2.00) 8.49 3.31 (3.00) 8.63 4.41 (4.00) 8.73 5.51 (5.00) 8.82 6.61 (6.00) 8.91 7.72 (7.00) 9.00 8.82 (8.00) 9.10 9.92 (9.00) 9.19 11.02 ( I 0.00) 9.28 12.13 (11.00) 9.37 13.23 (12.00) 9.47 14.33 (13.00) 9.58 15.43 (14.00) 9.70 16.53 (15.00) 9.81 17.64 (16.00) 9.92 18.74 (17.00) 9.94 19.84 ( I 8.00) 9.93 20.94 ( I 9.00) 9.92 22.05 (20.00) 9.91 23.15 (21.00) 9.90 38.58 (35.00 -

41.33 (37.49) 9.03 44.09 (40.00) 8.78 49.60 (45.00) 8.25 55.12 (50.00) 7.72 60.63 (55.00) 6.16 63.42 (57.53) 4.89 63.50 (57.61) 4.89 63.99 (58.05) 4.89 64.04 (58.09) 4.87 Notes:

(') Values in Table 11 are for two recirculation loop operation, see Section 8.1.1.

For single loop operation, see Section 8.1.2 (2) Engineering Data Bank (EDB) number, Reference 2.

(3) MAPLHGR Data, Reference 2.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 21 of 44

Table 12 MAPLHGR Limits (I)

GEl4C EDB-3378'" ~ ~ 1 4 - P0I ~ ~ ~ ~ 3~ G 9 Z1-00~-145-7-6-3378 1

- 1 Average Planar Exposure MAPLHGR Limit GWDIMTU (GWDISTU) (k~lft)'~'

0.00 (0.00) 8.72 0.22 (0.20) 8.75 1.10 (1.00) 8.82 2.20 (2.00) 8.91 3.31 (3.00) 8.98 4.41 (4.00) 9.04 5.51 (5.00) 9.10 6.61 (6.00) 9.17 7.72 (7.00) 9.24.

8.82 (8.00) 9.31 9.92 (9.00) 9.38 11.02 ( I 0.00) 9.45 12.13 (11.00) 9.51 13.23 (12.00) 9.58 14.33 (13.00) 9.67 15.43 (14.00) 9.76 16.53 (15.00) 9.84 17.64 (16.00) 9.92 18.74 ( I 7.00) 9.98 19.84 (18.00) 10.00 20.94 (19.00) 10.00 22.05 (20.00) 10.01 23.15 (21.00) 10.01 24.25 (22.00) 10.01 25.35 (23.00) 10.01 26.46 (24.00) 10.01 27.56 (25.00) 10.01 33.07 (30.00) 9.96 38.58 (35.00) 9.44 41.33 (37.49) 9.15 44.09 (40.00) 8.87 49.60 (45.00) 8.29 55.12 (50.00) 7.75 60.63 (55.00) 6.22 63.50 (57.61) 4.92 63.64 (57.74) 4.86 63.66 (57.75) 4.86 64.05 (58.10) 4.86 64.09 (58.14) 4.86 Notes:

(I) Values in Table 12 are for two recirculation loop operation, see Section 8.1 . I .

For single loop operation, see Section 8.1.2 (2) Engineering Data Bank (EDB) number, Reference 2.

(3) MAPLHGR Data, Reference 2.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 22 of 44

Table 13

• UO2IGd Thermal Mechanical LHGR Limits (Reference 29)

Bundle Type: GE14-PI ODNAB393-17GZ-1OOT-145-T6-2599 (GE14C)

Engineering Data Bank (EDB) Bundle Number I:2599 Peak Pellet Exposure Most Limiting Gadolinia LHGR Limit GWdIMT (GWDIST) (kwlft)

Notes:

1 Reference 29.

2. Applicable multipliers per Section 8.2 will be applied to the data in this table for two recirculation loop and single recirculation loop operations.

Table 14 "

U021Gd Thermal Mechanical LHGR Limits (Reference 29)

Bundle Type: GE14-PI ODNAB392-16GZ-100T-145-T6-2824 (GE14C) 1 1 Engineering Data Bank (EDB) Bundle Number ': 2824 I

Peak Pellet Exposure U02 LHGR Limit Peak Pellet Exposure Most Limiting Gadolinia LHGR Limit GWdIMT (GWDIST) (kwlft) GWdIMT (GWDIST) (kwlft) 0.00 (0.00) 13.40 0.00 (0.00) 12.00 Notes:

1. Reference 29.

2. Applicable multipliers per Section 8.2 will be applied to the data in this table for two recirculation loop and single recirculation loop operations.

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Table 15 U02lGd Thermal Mechanical LHGR Limits (Reference 29)

Bundle Type: GE14-P10DNAB392-16GZ-100T-145-T6-2931(GEl4C)

Engineering Data Bank (EDB) Bundle Number ': 2931 1

Peak Pellet Exposure U02 LHGR Limit Peak Pellet Exposure Most Limiting Gadolinia LHGR Limit GWdIMT (GWDIST) (kWIft) GWdIMT (GWDIST) (kwlft)

Notes:

1. Reference 29.

2. Applicable multipliers per Section 8.2 will be applied to the data in this table for two recirculation loop and single recirculation loop operations.

Table 16 U02lGd Thermal Mechanical LHGR Limits (Reference 29)

Bundle Type: GEl4-PI ODNAB392-17GZ-1OOT-145-T6-2932 (GEl4C)

Engineering Data Bank (EDB) Bundle Number I : 2932 Peak Pellet Exposure U02 LHGR Limit Peak Pellet Exposure Most Limiting Gadolinia LHGR Limit GWdIMT (GWDIST) (kwlft) GWdIMT (GWDIST) (kwlft) 0.00 (0.00) 13.40 0.00 (0.00) 12.26 Notes:

1. Reference 29.

2. Applicable multipliers per Section 8.2 will be applied to the data in this table for two recirculation loop and single recirculation loop operations.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 24 of 44

Table 17 UO2IGd Thermal Mechanical LHGR Limits (Reference 29)

Bundle Type: GEl4-PlODNAB424-14GZ-I 00T-145-T6-3100 (GEl4C)

Engineering Data Bank (EDB) Bundle Number ': 3100 Peak Pellet Exposure U02 LHGR Limit Peak Pellet Exposure Most Limiting Gadolinia LHGR Limit GWdIMT (GWDIST) (kwlft) GWdIMT (GWDIST) (kwlft) 0.00 (0.00) 13.40 0.00 (0.00) 12.00 16.00 (14.51) 13.40 13.42 (12.17) 12.00 63.50 (57.61) 8.00 60.17 (54.59) 7.16 70.00 (63.50) 5.00 66.57 (60.39) 4.48 Notes:

1. Reference 29.

2. Applicable multipliers per Section 8.2 will be applied to the data in this table for two recirculation loop and single recirculation loop operations.

Table 18 U02lGd Thermal Mechanical LHGR Limits (R'eference 29)

Bundle Type: GE14-PI ODNAB375-16GZ-100T-145-T6-3101 (GEI 4C)

Engineering Data Bank (EDB) Bundle Number I: 3101 Peak Pellet Exposure U02 LHGR Limit Peak Pellet Exposure Most Limiting Gadolinia LHGR Limit GWdlMT (GWDIST) (kwlft) 0.00 (0.00) 13.40 0.00 (0.00) 12.00 16.00 (14.51) 13.40 13.42 (12.17) 12.00 63.50 (57.61) 8.00 60.17 (54.59) 7.16 70.00 (63.50) 5.00 66.57 (60.39) 4.48 Notes:

1. Reference 29.

2. Applicable multipliers per Section 8.2 will be applied to the data in this table for two recirculation loop and single recirculation loop operations.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 25 of 44

Table 19 UO2IGd Thermal Mechanical LHGR Limits (Reference 29)

Bundle T v ~ e : GEl4-PI ODNAB392-I6GZ-1 1

~ n ~ i n e eData r h ~Bank (EDB) Bundle Numbc Peak Pellet Exposure U02 LHGR Limit Peak Pellet Exposure Most Limiting Gadolinia LHGR Limit GWdIMT (GWDIST) (kwlft) GWdIMT (GWDIST) (kwlft)

Notes:

I. Reference 29.

2. Applicable multipliers per Section 8.2 will be applied to the data in this table for two recirculation loop and single recirculation loop operations.

Table 20 U02lGd Thermal Mechanical LHGR Limits (Reference 29)

Bundle Type: GE14-PI ODNAB391-12GZ-100T-145-716-3103 (GE14C)

Engineering Data Bank (EDB) Bundle Number ': 3103 Peak Pellet Exposure U02 LHGR Limit Peak Pellet Exposure Most Limiting Gadolinia LHGR Limit GW~I'MT (GWDIST) (kwlft) GWdIMT (GWDIST) (kwlft) 0.00 (0.00) 13.40 0.00 (0.00) 12.00 16.00 (14.51) 13.40 13.42 (12.17) 12.00 63.50 (57.61) 8.00 60.1 7 (54.59) 7.16 70.00 (63.50) 5.00 66.57 (60.39) 4.48 Notes:

1. Reference 29.

2. Applicable multipliers per Section 8.2 will be applied to the data in this table for two recirculation loop and single recirculation loop operations.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 26 of 44

Table 21 U02lGd Thermal Mechanical LHGR Limits (Reference 5)

Bundle Type: GEl4-PI ODNAB373-16GZ-100T-145-T6-3375 (GEl4C)

Engineering Data Bank (EDB) Bundle Number ': 3375 Peak Pellet Exposure U02 LHGR Limit Peak Pellet Exposure Most Limiting Gadolinia LHGR Limit GWdIMT (GWDIST) (kwlft) GWdIMT (GWDIST) (kwlft) 0.00 (0.00) 13.40 0.00 (0.00) 12.00 16.00 (14.51) 13.40 13.42 (12.17) 12.00 63.50 (57.61) 8.00 60.17 (54.59) 7.16 70.00 (63.50) 5.00 66.57 (60.39) 4.48 Notes:

1. Reference 5.

2. Applicable multipliers per Section 8.2 will be applied to the data in this table for two recirculation loop and single recirculation loop operations.

Table 22 U021Gd Thermal Mechanical LHGR Limits (Reference 5)

Bundle Type: GE14-PI ODNAB391-16GZ-I 00T-145-T6-3376 (GEl4C)

Peak Pellet Exposure GWdIMT (GWDIST)

U02 LHGR Limit (kW)

Peak Pellet Exposure GWdIMT (GWDIST) 1 Most Limiting Gadolinia LHGR Limit (kwlft)

Notes:

1. Reference 5.

2. Applicable multipliers per Section 8.2 will be applied to the data in this table for two recirculation loop and single recirculation loop operations.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 27 of 44

Table 23 U02lGd Thermal Mechanical LHGR Limits (Reference 5)

Bundle Type: GEl4-PIODNAB391-15GZ-100T-145-T6-3377 (GEl4C)

Engineering Data Bank (EDB) Bundle Number ': 3377 Peak Pellet Exposure U02 LHGR Limit Peak Pellet Exposure Most Limiting Gadolinia LHGR Limit GWdIMT (GWDIST) (kwlft) GWdIMT (GWDIST) (kwlft) 0.00 (0.00) 13.40 0.00 (0.00) 12.00 Notes:

1. Reference 5.

2. Applicable multipliers per Section 8.2 will be applied to the data in this table for two recirculation loop and single recirculation loop operations.

Table 24 U02lGd Thermal Mechanical LHGR Limits (Reference 5)

Bundle Type: GEl4-PI ODNAB391-12GZ-100T-145-7-6-3378 (GEI 4C)

Engineering Data Bank (EDB) Bundle Number ': 3378 Peak Pellet Exposure U02 LHGR Limit Peak Pellet Exposure Most Limiting Gadolinia LHGR Limit GWdIMT (GWDIST) (kwlft) GWdlMT (GWDIST) (kwlft) 0.00 (0.00) 13.40 0.00 (0.00) 12.00 16.00 (14.51) 13.40 13.42 (12.17) 12.00 63.50 (57.61) 8.00 60.17 (54.59) 7.16 70.00 (63.50) 5.00 66.57 (60.39) 4.48 Notes:

1. Reference 5.

2. Applicable multipliers per Section 8.2 will be applied to the data in this table for two recirculation loop and single recirculation loop operations.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 28 of 44

9.0 Core Stability Requirements Stabilitv O ~ t i o nIll Solution For Cycle 26, Monticello has implemented the BWR Owners Group Long Term Stability Solution Option Ill using the Oscillation Power Range Monitor (OPRM) as described in References 4 and 10. The plant specific Hot Channel Oscillation Magnitude (HCOM)

(Reference 11) and other cycle specific stability parameters are used in the Cycle 26 Option Ill Stability Evaluation, which is documented in Reference 2. A Backup Stability Protection (BSP) evaluation is also documented in References 2 and 13, and is used in the event that the Option Ill OPRM system is declared INOPERABLE.

The following Option Ill OPRM stability setpoint determination and the implementation of the associated BSP Regions shown in Figures 5 and 6 provide the stability licensing bases for Monticello Cycle 26.

Option Ill OPRM Setpoints A reload Option Ill evaluation has been performed in accordance with the licensing methodology described in Reference 4. The stability based Operating Limit Minimum Critical Power Ratio (OLMCPR) is determined for two conditions as a function of OPRM amplitude setpoint. The two conditions evaluated are: ( I ) a postulated oscillation at 45%

rated core flow quasi steady-state operation (SS), and (2) a postulated oscillation following a two recirculation pump trip (2PT) from the limiting rated power operating state point.

The OPRM-setpoint-dependent OLMCPR(SS) and OLMCPR(2PT) values are calculated for Cycle 26 in accordance with the BWROG regional mode DlVOM guidelines described in Reference 12. The Cycle 26 Option Ill evaluation provides adequate protection against violation of the Safety Limit MCPR (SLMCPR) for the two postulated reactor instability events as long as the plant OLMCPR is equal to or greater than OLMCPR(SS) and OLMCPR(2PT) for the selected OPRM setpoint in Table 26.

The relationship between the OPRM Successive Confirmation Count Setpoint and the OPRM Amplitude Setpoint is provided in Reference 4 and Table 25. For intermediate OPRM Amplitude Setpoints, the corresponding OPRM Successive Confirmation Count Setpoints have been obtained by using linear interpolation.

The OPRM setpoints for Two Loop Operation (TLO) are conservative relative to Single Loop Operation (SLO) and are, therefore, bounding.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 29 of 44

Table 25 Relationship Between OPRM Successive Confirmation Count Setpoint and OPRM Amplitude Setpoint Successive OPRM Confirmation Amplitude Count Setpoint Setpoint 6 -

> I .04 8 -

>1.05 9 > I .06 10 >1.07 II -

> I .08 12 -

>1.09 13 -

>1.10 14 -

>l.ll

>1.13 20 Table 26 OPRM Setpoint Versus OLMCPR OPRM Amplitude OLMCPR(SS) OLMCPR(2PT)

Setpoint 1.05 1.256 1.180 I.06 1.279 1.201 I.07 1.302 1.223 I.08 1.326 1.246 I.09 1.351 1.270 1.10 1.377 1.294 1.11 1.403 1.318 1.12 1.430 1.343 1.13 I.457 1.369

1. I 4 1.486 1.396 1.15 1.516 1.424 OLMCPR Acceptance 1.80 1.60 Criteria The OPRM Period Based Detection Algorithm (PBDA) instrumentation setpoints for use in Technical Specification LC0 3.3.1.1 Table 3.3. I . 1-1 Function 2f shall not exceed the following:

Confirmation Count Setpoint: 16 Amplitude Setpoint: 1.I 5 NAD-MN-025, Monticello Cycle 26 COLR,Revision 0 Page 30 of 44

Backup Stability Protection Regions The Backup Stability Protection (BSP) regions are shown in Figure 5, and are given in greater detail in Figure 6. The BSP regions are an integral part of the Tech Spec required alternative method to detect and suppress thermal hydraulic instability oscillations in that they identify areas of the powerlflow map where there is an increased probability that the reactor core could experience a thermal hydraulic instability.

Regions are identified that are either excluded from planned entry and continued operation (Scram Region), or where planned entry is not permitted unless specific operating restrictions are met and specific actions are required to be taken to immediately leave the region following inadvertent or forced entry (Controlled Entry Region). The boundaries of these regions are established on a cycle specific basis based upon core decay ratio calculations performed using NRC approved methodology (Reference 3).

The BSP regions are only applicable when the Upscale Trip function of the OPRM is INOPERABLE. The BSP region boundaries were calculated for Monticello Cycle 26 for nominal feedwater temperature conditions. The endpoints of the regions are defined in Table 27. The region boundaries shown in Figures 5 and 6 are defined using the Modified Shape Function (MSF), which is described in Reference 33.

Note that the Power-Flow map provided in plant operating procedures uses the Generic Shape Function (GSF) to define the BSP region boundaries. Using the GSF to define the BSP regions is conservative compared to using the MSF and is acceptable. Using the GSF also results in the Power-Flow map for Cycle 26 remaining unchanged from the Power-Flow map used for Cycle 25.

Table 27 Cycle 26 BSP Region Intercepts for Normal Feedwater Temperature Region Boundary Power Core Flow Core DR Highest Intercepts (%) (%) Channel DR A1 63.8 40.0 <O. 793 <0.265 B1 48.1 33.8 <0.779 <0.281 A2 72.8 50.0 ~0.796 ~0.248 B2 32.3 31.2 ~0.798 <0.099 Actions For Entry lnto Scram Resion Immediate manual scram upon determination that the region has been entered. If entry is unavoidable, early scram initiation is appropriate.

Actions For Entry lnto Controlled Entrv Reqion If entry is inadvertent or forced, immediately exit from region. The region can be exited by control rod insertion or core flow increase. Increasing the core flow by restarting an idle recirculation pump is not an acceptable method of exiting the region.

Deliberate entry into the Controlled Entry Region requires compliance with at least one of the stability controls outlined below:

I.Maintain core average boiling boundary (BB) 2 4.0 feet.

2. Maintain core decay ratio (DR) < 0.6 as calculated by an on-line stability monitor.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 31 of 44

3. Continuous dedicated monitoring of real time control room neutron monitoring instrumentation with manual scram required upon indication of a reactor instability induced power oscillation.

Caution is required whenever operating near the Controlled Entry Region boundary (i.e., within approximately 10% of core power or core flow), and it is recommended that the amount of time spent operating near this region be minimized.

Reference:

Technical Specification 3.3.1. I 10.0 Scram Time Dependence The Technical Specification Option A (no scram times dependence) OLMCPR can be found in Section 5 of this report. If the Option B scram time dependence option is preferred, then the procedure listed in Section 10.1 may be used.

0 . Technical Specification Scram Time Dependence Technical Specification 3.1.4 and Table 3.1.4-1 provide the scram insertion time versus position requirements for continued operations. Technical Specification Surveillance Requirements SR 3.1.4.1 - SR 3.1.4.4 provide the surveillance requirements for the CRDs. Data from testing of the CRDs, or from an unplanned scram, is summarized in Surveillance Test 0081. Reference 8 describes the procedure below.

Using this cycle specific information, values of -cave can be calculated in accordance with the equation below for the notch 36 position.

The Equation (1) used to calculate the average of all the scram data generated to date in the cycle is:

where: n = the number of surveillance tests performed to date in the cycle; z

i=l N, = total number of active control rods measured to date in the cycle; and sum of the scram times to the 36th notch position of all active rods z11 i=l Niri = measured to date in the cycle to comply with the Technical Specification surveillance requirements SR 3.1.4.1, SR 3.1.4.2, SR 3.1.4.3, SR 3.1.4.4.

NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 32 of 44

The average scram time, ,,,z is tested against the analysis mean using the following equation:

rave <ZB (2) where:

The parameters 1-1 and o are the mean and standard deviation of the distribution of the average scram insertion time to notch 36 position in the ODYN Option B analysis (Table 28), and N1= number of active control rods tested at BOC.

Table 28 GEMINI Methods, CRD Notch Position for TB Determination Notch Position CT I.1 36 0.830 0.049 If the cycle average scram time satisfies the Equation 2 criteria, continued plant operation under the ODYN Option B operating limit minimum critical power ratio (OLMCPR) for pressurization events is permitted. If not, the OLMCPR for pressurization events must be re-established, based on linear interpolation between the Option B and Option A OLMCPRs.

Note that Option B has an OLMCPR applicable to two recirculation loop operation, and an OLMCPR applicable to single recirculation loop operation. The Option B OLMCPR value for single recirculation loop operation is the same as the Option B OLMCPR value for two recirculation loop operation.

The equation to establish the new operating limit for pressurization events is given below:

OLMCPRNnv = U4X OLMCPR :znB + -TB TA - T B AOLMCPR, OLMCPRTTWep (4) 1 where:

Taw and 7 8 are defined in Equations 1 and 3, respectively; and TA = The Technical Specification limit on scram time to notch position 36 .

(Technical Specification Table 3.1.4-1 at notch position 36)

AOLMCPR = the difference between the Option A OLMCPR and the Option B OLMCPR reported in Table 29.

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Table 29 Cycle OLMCPR Values Transient Option A Option B Feed Water Controller Failure I.77 I.60 Turbine Trip with ~ y p a s s l I.60 1 The Turbine Trip with Bypass transient will be used as the Minimum OLMCPR transient for Option B Analysis.

2. All the OLMCPR values reported in Table 29 are for two recirculation loop operation.

3. For Options A and B, the OLMCPR value for single recirculation loop operation is equal to the OLMCPR value for two recirculation loop operation.

Sample Calculation:

Assume two recirculation loop operation.

If ,z is 0.820 seconds (scram time test) and TB (as calculated with equation 3) is 0.850 seconds then the criteria from Equation 2 is met and the Option B OLMCPR of 1.60 can be used.

If z,, is 0.940 seconds and 'CB is 0.850 seconds, then Equation 2 is not met and a new Option B OLMCPR must be calculated using Equation 4 above.

The example calculation is as follows:

OLMCPR:~:, = 1.60 (from Table 29 above.)

z,,, = 0.940 z, = 0.850 z, = 1.080 (Technical Specification Table 3.1.4-1 at notch position 36)

AOLMCPR = 1.77 - 1.60 = 0.17 (from Table 29 above; assume two recirculation loop operation)

OLMcpR,, = $1.60+ (0.940- 0.850)

• 0.17, 1.60) = 1.67; two recirculation loop operation.

1.080- 0.850 Note: If single recirculation loop operation Option B OLMCPR value is desired, the same value is used, i.e. 1.67.

1I.0 Turbine Bypass System Response Time The TURBINE BYPASS SYSTEM RESPONSE TIME shall be that time interval from when the main turbine trip solenoid is activated until 80% of the turbine bypass capacity is established.

The TURBINE BYPASS SYSTEM RESPONSE TIME shall be 5 1.1 seconds.

Reference:

Technical Specification 1.I, Surveillance Requirement 3.7.7.3.

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12.0 Shutdown Margin (SDM) Confirmation Technical Specification 3.1.1 requires that the SDM be confirmed for Monticello Cycle 26.

Analytical SDM has been confirmed in the Supplemental Reload Licensing Report (Reference 2, Section 4).

For any mid-cycle core loading changes, the analytical SDM will be re-confirmed, formally documented, and reviewed prior to start-up.

13.0 APRM Simulated Thermal Power - High Delta W Allowable Value The APRM Simulated Thermal Power - High Flow Biased Scram Setpoint Allowable Value shall be:

where:

S Psi = Scram setting in percent of rated thermal power (1775 MWt)

W= Loop recirculation flow rate in percent of rated AW = Difference between two-loop and single-loop effective recirculation flow at the same core flow (AW = 5.4% for single loop operation, AW = 0.0 for two-loop operation)

Reference:

Technical Specification 5.6.3, item 5, Technical Specification Table 3.3.1.1-1, Function 2.b, and Reference 32 NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 35 of 44

Figure I Monticello Cycle 26 Power Dependent MAPLHGR and LHGR Multipliers 25 30 35 40 45 50 55 60 65 70 75 80 85 90 POWER (% Rated)

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Figure 2 Monticello Cycle 26 Flow Dependent MAPLHGR and LHGR Multipliers 30 40 50 60 70 80 90 100 110 Core Flow (% Rated)

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Figure 3 Monticello Cycle 26 Power Dependent M(P) 1 MCPR(P) Limits 20 30 40 50 60 70 80 90 100 110 Power (% Rated)

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Figure 4 Monticello Cycle 26 Flow Dependent CPR Limits I Core Flow (% Rated)

I The MCPRf limits shown above are cut-off at the ECCS-LOCA MCPR = 1.35 as specified in Section 16.3 and Appendix D of Reference 2.

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Figure 5 Monticello Cycle 26 PowerlFlow Map 2250 Continued operation above the MELLLA Boundary is not allowed. Take immediate action to exit the region above the MELLLA Boundary.

2000 -

I 1750 -- Scram Region

- ME -LLA Boundary Applicable when OPRM

- Upscale Trip is INOPERABLE Immediate manual scram Applicable when OPRM Upscale Trip is INOPERABLE Immediate exit required upon

= 1775 MWt 0 10 20 30 40 50 60 Core Flow (MlblHr)

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Figure 6 Monticello Cycle 26 PowerIFlow Map action to exit the region above the MELLLA pplicable when OPRM Applicable when OPRM Upscale Trip is Immediate exit required upon unplanned entry.

Power Distribution Controls or continuous monitoring required for planned entry.

100% Core Power = 1775 M W t 100% Core Flow = 57.6 Mlb/hr Max. Core Flow at 100% Power = 57.2 Mlb/hr 20%

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 Core Flow (MlbIHr)

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Figure 7 Stability Criterion Map CHANNEL DECAY RATIO NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 42 of 44

Figure 8 Monticello Cycle 26 Power Dependent K(P) and WICPR(P) Limits for Pressure Regulator Out of Service (PROOS)

I I I I I I I I I 4.0 I I I I I I I I No I

Change t Operating Limit MCPR Determination t I from I Figure 3 t For P < 25%: No Thermal Limits Monitoring Required s 3.5 I I -

9 I I OLMCPR(P), No change from Figure 3 V) 03 I I For 25% r P < 45%, > 50% Flow V I I OLMCPR(P) = 2.72 + 0.028*(45%-P) a Flow > 50% For 25% 5 P < 45%, S 50% Flow L

d? I OLMCPR(P) = 2.22 + 0.0305*(45%-P) h FL. OLMCPR(P) for PROOS 3.0 For 45% s P < 60% OLMCPRp = 2.24 + 0.00867*(60%-P) 0 For 60% 5 P < 83% OLMCPRp = 1.88 + 0.0144*(85%-P) 50 For 83% 5 P < 85% OLMCPRp = 1.897 + 0.0059*(85%-P) s

- OLMCPR(P) = K(P)

• OLMCPR(IOO), No change from Fig. 3 9 For 85% r P < 90% Kp = 1.056 + 0.00313*(90%-P)

V) m For 90% r P < 100% Kp = 1.OO + 0.0056*(100%-P)

A' 2.5 -

a I L

I d? I 2

3 I I

I I I

I

- .-;ii I I 3

- 2.0 I I sa? I I

I I

I I

I I

a I t I 0

2 I< 8 OLMCPR(F') I - KP t I I I 1.5 - ' I - - - -

I I I I I I I I I I I I I I I I I  ?

1.o I t I

I I

20 30 40 50 60 70 80 90 100 110 1 Power (% Rated) 1 NAD-MN-025, Monticello Cycle 26 COLR, Revision 0 Page 43 of 44

Figure 9 Pressure Regulator Out Of Service Interim MFLCPR Limit 20 30 40 50 60 70 80 90 100 Power (% Rated)

The plot is valid for Option A & B scram times.

The limit is not dependent on core flow.

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