ML14168A283

Core Operating Limits Report, Cycle 23

ML14168A283
Person / Time
Site:	Millstone
Issue date:	06/10/2014
From:	Armstrong L Dominion, Dominion Nuclear Connecticut
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
14-261
Download: ML14168A283 (14)

Text

Dominion Nuclear Connecticut, Inc.

Rope Ferry Rd., Waterford, CT 06385 iDominioni Mailing Address: P.O. Box 128 JUN 10 2014' Warerford, CT 06385 dorn.com U. S. Nuclear Regulatory Commission Serial No.14-261 Attention: Document Control Desk NSS&L/MLC RO Washington, DC 20555 Docket No. 50-336 License No. DPR-65 DOMINION NUCLEAR CONNECTICUT, INC.

MILLSTONE POWER STATION UNIT 2 CORE OPERATING LIMITS REPORT, CYCLE 23 In accordance with the Millstone Power Station Unit 2 (MPS2) Technical Specifications (TSs), Section 6.9.1.8.d, Dominion Nuclear Connecticut, Inc., hereby submits, as an enclosure, the Cycle 23 Core Operating Limits Report (COLR).

The MPS2 COLR has been revised to include the following:

• Revision of page headers to reflect Cycle 23.

" Editorial changes to correct administrative and typographical errors.

" Revision of Figure 2.7-1 to extend the ACCEPTABLE OPERATING REGION over the power range from 0% to 40%.

" Removal of the 1.0025 penalty factor for incore instrument misalignment.

Starting with Cycle 21, this penalty was included in the COLR to account for a small misalignment of 26 of the 44 installed In-Core Instruments (ICI) detectors (reference Agencywide Documents Access and Management System Accession Nos. ML11152A148, ML11342A122, ML12025A225 and ML12025A226). During Refueling Outage 22, all but two of the affected ICI strings were replaced with ICI strings with a slightly shorter tail (the two remaining misaligned ICI strings are located on the core periphery). This allows the ICI detectors to be properly positioned to restore the original axial power distribution monitoring function, permitting the deletion of the penalty factor for Cycle 23.

The Cycle 23 COLR has been incorporated into the MPS2 Technical Requirements Manual.

If you have any questions or require additional information, please contact Mr. William D.

Bartron at (860) 444-4301.

Sincerely, L. J. Afnmstrong Director, Nuclear Station Licensing - Millstone 4c&(

Serial No.14-261 Docket No. 50-336 MPS2 Cycle 23 COLR Page 2 of 2

Enclosure:

Core Operating Limits Report, Cycle 23 Commitments made in this letter:

None.

cc: U.S. Nuclear Regulatory Commission Region I 2100 Renaissance Blvd. Suite 100 King of Prussia, PA 19406-2713 M. C. Thadani Project Manager - Millstone Power Station U.S. Nuclear Regulatory Commission One White Flint North, Mail Stop 08-Bl 11555 Rockville Pike Rockville, MD 20852-2738 NRC Senior Resident Inspector Millstone Power Station

Serial No.14-261 Docket No. 50-336 ENCLOSURE CORE OPERATING LIMITS REPORT. CYCLE 23 DOMINION NUCLEAR CONNECTICUT, INC.

MILLSTONE POWER STATION UNIT 2

TECHNICAL REQUIREMENTS MANUAL APPENDIX 8.1 CORE OPERATING LIMITS REPORT, CYCLE 23 I

1. CORE OPERATING LIMITS REPORT This CORE OPERATING LIMITS REPORT for Millstone 2 has been prepared in accordance with the requirements of Technical Specification 6.9.1.8 a through 6.9.1.8 d.

The Technical Specifications affected by this report are listed below:

Section Specification 2.1 3/4.1.1.1 SHUTDOWN MARGIN - (SDM) 2.2 Deleted (Ref. License Amendment 280) I 2.3 3/4.1.1.4 Moderator Temperature Coefficient (MTC) 2.4 3/4.1.3.6 Regulating CEA Insertion Limits 2.5 3/4.2.1 Linear Heat Rate 2.6 3/4.2.3 TOTAL UNRODDED INTEGRATED RADIAL PEAKING FACTOR -- FrT 2.7 3/4.2.6 DNB Margin Terms appearing in capitalized type are DEFINED TERMS as defined in Section 1.0 of the Technical Specifications.

2. OPERATING LIMITS The cycle-specific parameter limits for the specifications listed in Section 1.0 are presented in the following subsections. These limits have been developed using the NRC approved methodologies specified in Section 3.

2.1 SHUTDOWN MARGIN - (SDM) (Specification,3/4.1 .1.1)

The SHUTDOWN MARGIN shall be _>3.6% AK/K 2.2 Deleted I 2.3 Moderator Temperature Coefficient (Specification 3/4.1.1.4)

The moderator temperature coefficient shall be:

a. Less positive than 0.7x1 0 4 AK/K/°F whenever THERMAL POWER is __70% of RATED THERMAL POWER,

b. Less positive than 0.4x1 0 4 AK/K/0 F whenever THERMAL POWER is> 70%

of RATED THERMAL POWER,

c. Less negative than -3 .2 x10-4 AK/K/ 0F at RATED THERMAL POWER.

MILLSTONE - UNIT 2 TRM 8.1-1 LBDCR 14-MP2-004 April 1,2014

TECHNICAL REQUIREMENTS MANUAL APPENDIX 8.1 CORE OPERATING LIMITS REPORT, CYCLE 23 2.4 Regulating CEA Insertion Limits (Technical Specification 3/4.1.3.6)

The regulating CEA groups shall be limited to the withdrawal sequence and to the insertion limits shown in Figure 2.4-1. CEA insertion between the Long Term Steady State Insertion Limits and the Transient Insertion Limits is restricted to:

a. <4 hours per 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> interval,

b. <5 Effective Full Power Days per 30 Effective Full Power Day interval, and

c. < 14 Effective Full Power Days per 365 Effective Full Power Day interval.

2.5 Linear Heat Rate (Technical Specification 3/4.2.1)

The linear heat rate, including heat generated in the fuel, clad and moderator, shall not exceed:

a. 15.1 kw/ft whenever the reactor coolant flow rate (determined per Technical Specification 3/4.2.1) is Ž_360,000 gpm.

b. 15.0 kw/ft whenever the reactor coolant flow rate (determined per Technical Specification 3/4.2.1) is < 360,000 gpm and Ž_354,600 gpm.

c. 14.9 kw/ft whenever the reactor coolant flow rate (determined per Technical Specification 3/4.2.1) is < 354,600 gpm and _Ž 349,200 gpm.

During operation with the linear heat rate being monitored by the Excore Detector Monitoring System, the AXIAL SHAPE INDEX shall remain within the limits of Figure 2.5-1.

During operation with the linear heat rate being monitored by the Incore Detector Monitor System, the alarm setpoints shall be adjusted to less than or equal to the limit when the following factors are appropriately included in the setting of the alarms:

1. A measurement-calculational uncertainty factor of 1.07,

2. An engineering uncertainty factor of 1.03, and

3. A THERMAL POWER measurement uncertainty factor of 1.02.

MILLSTONE - UNIT 2 TRM 8.1-2 LBDCR 14-MP2-004 April 1,2014

TECHNICAL REQUIREMENTS MANUAL APPENDIX 8.1 CORE OPERATING LIMITS REPORT, CYCLE 23 I 2.6 TOTAL UNRODDED INTEGRATED RADIAL PEAKING FACTOR -- FrT (Technical Specification 3/4.2.3)

The calculated value of FrT at RATED THERMAL POWER shall be:

< 1.690 whenever the reactor coolant flow rate is Ž 360,000 gpm.

< 1.664 whenever the reactor coolant flow rate is < 360,000 gpm and Ž354,600 gpm.

< 1.639 whenever the reactor coolant flow rate is < 354,600 gpm and _ 349,200 gpm.

2.6.1 The Power Dependent Frr limits, whenever the reactor coolant flow rate is _>360,000 gpm, are shown in Figure 2.6-1.

2.6.2 The Power Dependent FrT limits, whenever the reactor coolant flow rate is < 360,000 gpm and >_354,600 gpm, are shown in Figure 2.6-2. I 2.6.3 The Power Dependent FrT limits, whenever the reactor coolant flow rate is < 354,600 gpm and _>349,200 gpm, are shown in Figure 2.6-3.

2.7 DNB Margin (Technical Specification 3/4.2.6)

The DNB margin shall be preserved by maintaining the cold leg temperature, pressurizer pressure, reactor coolant flow rate, and AXIAL SHAPE INDEX within the following limits:

Parameter Limits Four Reactor Coolant Pumps Operations

a. Cold Leg Temperatiure < 549°F

b. Pressurizer Pressurre > 2225 psia*

C. Reactor Coolant FIc w Rate >Ž 360,000 gpm with Linear Heat Rate and FrT limits as specified in Sections 2.5 and 2.6.

or

Ž>354,600 gpm with Linear Heat Rate and FrT limit reductions as specified in Sections 2.5 and 2.6.

or

> 349,200 gpm with Linear Heat Rate and FrT limit reductions as specified in Sections 2.5 and 2.6.

d. AXIAL SHAPE INDEX Figure 2.7-1

• Limit not applicable during either the THERMAL POWER ramp increase in excess of 5% of RATED THERMAL POWER per minute or a THERMAL POWER step increase of greater than 10% of RATED THERMAL POWER.

MILLSTONE - UNIT 2 TRM 8.1-3 LBDCR 14-MP2-004 April 1, 2014

TECHNICAL REQUIREMENTS MANUAL APPENDIX 8.1 CORE OPERATING LIMITS REPORT, CYCLE 23

3. ANALYTICAL METHODS The analytical methods used to determine the core operating limits shall be those previously reviewed and approved by the NRC, specifically those described in the following documents:

3.1 EMF-96-029(P)(A) Volumes 1 and 2, "Reactor Analysis System for PWRs Volume 1 - Methodology Description, Volume 2 - Benchmarking Results,"

Siemens Power Corporation, January 1997.

3.2 ANF-84-73 Revision 5 Appendix B(P)(A), "Advanced Nuclear Fuels Methodology for Pressurized Water Reactors: Analysis of Chapter 15 Events," Advanced Nuclear Fuels, July 1990.

3.3 XN-NF-82-21(P)(A) Revision 1, "Application of Exxon Nuclear Company PWR Thermal Margin Methodology to Mixed Core Configurations," Exxon Nuclear Company, September 1983.

3.4 XN-75-32(P)(A) Supplements 1 through 4, "Computational Procedure for Evaluating Fuel Rod Bowing," Exxon Nuclear Company, October 1983.

3.5 EMF-2328(P)(A), "PWR Small Break LOCA Evaluation Model S-RELAP5 Based,"

Framatome ANP, March 2001.

3.6 EMF-2087(P)(A), "SEM/PWR-98: ECCS Evaluation Model for PWR LBLOCA Applications," Siemens Power Corporation, June 1999.

3.7 XN-NF-78-44(NP)(A), "A Generic Analysis of the Control Rod Ejection Transient for Pressurized Water Reactors," Exxon Nuclear Company, October 1983.

3.8 XN-NF-621(P)(A) Revision 1, "Exxon Nuclear DNB Correlation for PWR Fuel Designs," Exxon Nuclear Company, September 1983.

3.9 XN-NF-82-06(P)(A) Revision 1 and Supplements 2, 4, and 5, "Qualification of Exxon Nuclear Fuel for Extended Burnup," Exxon Nuclear Company, October 1986.

3.10 ANF-88-133(P)(A) and Supplement 1, "Qualification of Advanced Nuclear Fuels PWR Design Methodology for Rod Burnups of 62 GWd/MTU," Advanced Nuclear Fuels Corporation, December 1991.

MILLSTONE - UNIT 2 TRM 8.1-4 LBDCR 14-MP2-004 April 1,2014

TECHNICAL REQUIREMENTS MANUAL APPENDIX 8.1 CORE OPERATING LIMITS REPORT. CYCLE 23 I 3.11 XN-NF-85-92(P)(A) "Exxon Nuclear Uranium Dioxide/Gadolinia Irradiation Examination and Thermal Conductivity Results," Exxon Nuclear Company, November 1986.

3.12 ANF-89-151(P)(A), "ANF-RELAP Methodology for Pressurized Water Reactors:

Analysis of Non-LOCA Chapter 15 Events," Advanced Nuclear Fuels Corporation, May 1992.

3.13 EMF-1 961 (P)(A) Revision 0, "Statistical Setpoint/Transient Methodology for Combustion Engineering Type Reactors," Siemens Power Corporation, July 2000.

3.14 EMF-2310(P)(A), Revision 1, "SRP Chapter 15 Non-LOCA Methodology for Pressurized Water Reactors," Framatome ANP, May 2004.

3.15 EMF-92-153(P)(A), Revision 1, "HTP: Departure from Nucleate Boiling Correlation for High Thermal Performance Fuel," Siemens Power Corporation, January 2005.

3.16 EMF-92-116(P)(A) Revision 0, "Generic Mechanical Design Criteria for PWR Fuel Designs," Siemens Power Corporation, February 1999.

MILLSTONE - UNIT 2 TRM 8.1-5 LBDCR 14-MP2-004 April 1,2014

TECHNICAL REQUIREMENTS MANUAL APPENDIX 8.1 CORE OPERATING LIMITS REPORT, CYCLE 23 I (1.00, BeANK? 135 steps]

!100 090 0.80 (0.73. BANK 7 97 Ste-ps) - TiI 4 0.70 0.60

-~~0 '.l5~15S~

5- BAN K6 S90 tes 0.50 o 040 0 TRANSIENT INSERTIONLIMI,4T - - . - - -

,, 050

(~2)z 0.20 0.10 1 -1 ~(0 20. BANK 5@72 Steps) 000 1I 7.1 1 1 1 1 I; I I0 I I I s l II II I

II 108 72 30 0 1M0 180 BANKS 144 I I Ia I 144 10a 72 36 1 4 1801 144 I

108 I

72 36 U 180 180144 108 72 38 0 180 144 108 72 36 0 CEA Position (steps withdrawr Note: Regulating CEAs that are > 176 steps withdrawn are considered fully withdrawn and are acceptable per this figure.

Figure 2.4-1 CEA Insertion Limit vs. THERMAL POWER With Four Reactor Coolant Pumps Operating MILLSTONE - UNIT 2 TRM 8.1-6 LBDCR 14-MP2-004 April 1,2014

TECHNICAL REQUIREMENTS MANUAL APPENDIX 8.1 CORE OPERATING LIMITS REPORT. CYCLE 23 I 120 - UNACCEPTABLE OPERATION ---------

REGION 110 ......................

!(-0.08, 100) !B D i_(0.08,100)

SG -- - -3: - - --.,.........

L ACCEPTABLE T ---- I..-- - -- - ,P -- - - - -..-,-- .. .. -. -..- -

.. ... . ORERAION.

70 ----------........ . .......... ..........

I .. -- - '--------

o 60 --------------.. (-0.3,8 ..; . .. . .. .. *.. .. . *; Point Break (o)* . . . . . . . ..

. .. . .. . .. . .. . ....--... ----... --...... ... ....-.. ,.5)... ....

5 -- ..............

-- A" ..... ..... .............--

o B (-0.11,100) ,

6 40 -........... .......  ;........ C (0.00, 101)

S0 D (+0.08, 100) so -------- ------------------ E (+0-25. 65) ....... ...............

I I I I, 20 Note: Point'Uisproidedforsettingplantinstrurmentaiononly.

Operation is not allowed above 100% of rated power. ,

10 L .. .... . . . . ........ . . I.. -- - - - - -----------. .,.,.. .. . .. .. .. . . . . ..

-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 AXIAL SHAPE INDEX (ASI)

Figure 2.5-1 AXIAL SHAPE INDEX vs.

PERCENT OF ALLOWABLE POWER LEVEL MILLSTONE - UNIT 2 TRM 8.1-7 LBDCR 14-MP2-004 April 1, 2014

TECHNICAL REQUIREMENTS MANUAL APPENDIX 8.1 CORE OPERATING LIMITS REPORT, CYCLE 23 100,....,1....... ..

(1.7ý068 90), , UNACCEPTABLE .,

90= .. . - ........ ...... " ...... ". -- ....... r--, OPER.ATION .... ,......."........." .......

REGICNq

....... IIA/U

...... .............. e ................... I ...... ,............. 0...... 0 ..... .-.... 4...... . - .

30.

0. . . . .. .L..... . .......

10.......................................

• I I l l

• I I I ..........

I I a.....I l l 20 . ... . ..

.. . .. .. ' -- I- - .. . . . . . . . . .. .. ------

10 . ...... ................ .... ............. ......... . . . . . . . . .. . . . . . . . . . . . . . . .

1.69 1.70 1.71 1.72 1.73 1.74 1.75 1.76 1.77 1.78 '1.79 1.80 1.81 1'.82 1.83 1.84 TOTAL UNRODDED INT2ERATED RADIAL PEAKING FACTOR- F1T Note: The FrT limit should be reduced for reactor coolant flow rates Ž: 349,200 gpm and < 360,000 gpm (see Section 2.6).

Figure 2.6-1 TOTAL UNRODDED INTEGRATED RADIAL PEAKING FACTOR vs. Allowable RATED THERMAL POWER For Reactor Coolant Flow Rates Ž: 360,000 gpm MILLSTONE - UNIT 2 TRM 8.1-8 LBDCR 14-MP2-004 April 1, 2014

TECHNICAL REQUIREMENTS MANUAL APPENDIX 8.1 CORE OPERATING LIMITS REPORT, CYCLE 23 100- (1.664,100) -----. .

0* 80 ,

• LtNACCEPTABLE 90 .......

. AC ...... .... ........ ... ... .. O".PE ON ... .I" . I......

REGION 7 - - - . . I. - I. - - - .

7 0 . .. ..

~60................. .OPERATION.09,70 50.... .... ..

CI a I

• I I I I I I Il I S40................................. ............ ........................

530 .... .... ...........

10............*.r'.........

. I.

20 .........................

• • . . IlI I  !

10o........ L...... " ............. ....... ................... . ....... .

01 1.664 1.674 1.684 1.694 1.704 1.7'14 1.7*24 1.7'34 1.744 1.754 1.764 1.7,74 1.7'84 1.7,94 1.8,04 12814 TOTAL LINRCCCED INTEGRATED RADIAL PEAK(ING FACTOR- Fr Figure 2.6-2 TOTAL UNRODDED INTEGRATED RADIAL PEAKING FACTOR vs. Allowable RATED THERMAL POWER For Reactor Coolant Flow Rates < 360,000 gpm and Žt354,600 gpm MILLSTONE - UNIT 2 TRM 8.1-9 LBDCR 14-MP2-004 April 1, 2014

TECHNICAL REQUIREMENTS MANUAL APPENDIX 8.1 CORE OPERATING LIMITS REPORT, CYCLE 23 90 .......... ..........................................

. . . . . REGION A........

s . L I ..... a . a 0 . . . i a e 0 . . .. . I

3. .................

i . I . I............ a I ...... a......................

a I I r .........

I i ....

I i

• a

• a a a a a a a a I i I a a I I i I i a l m i I i* I

• I 10 ........... ... REIN........................... ............. ............ ........ .....

20 . . . ...

313 a . .. a .. . . .. . ... .. .. ..... .. .. a a.. .

... . j.. .. I .. .

1.639 1.649 1.659 1.669 1.679 11,6139 1.699 1.709 1.719 1.729 1.739 1.749 1.759 1.769 1.779 1.789 TOTAL UNK)DCED INTEGRATED RADIAL PE] NG FACTOR- FT Figure 2.6-3 TOTAL UNRODDED INTEGRATED RADIAL PEAKING FACTOR vs. Allowable RATED THERMAL POWER For Reactor Coolant Flow Rates < 354,600 gpm and Ži 349,200 gpm MILLSTONE - UNIT 2 TRM 8.1 -10 LBDCR 14-MP2-004 April 1, 2014

TECHNICAL REQUIREMENTS MANUAL APPENDIX 8.1 CORE OPERATING LIMITS REPORT, CYCLE 23 1.20 T - -

1.00 EJ--

-ti i OPERATION UNACCEPTABLE

(-01 1.0 j j j REGI.90 i

r7d OPERATION i

I -UNACCEPTABLE

. ~ -- OREGION REGION 0 .CC 0.20 .. -, 1...... -. ............

004 -t---**--- - - -!.. __ ... !--

o0.60 I I I I _ -

lii1- . -REGON -IIO ....

U .o ___ L __i _j

-0.6 -0.5 -0. -0.3 -0.2 -0.1 0 0.1 0.2 0.3 04 0.5 0.6 AXIALS-APE INDEX (AS[)

Figure 2.7-1 AXIAL SHAPE INDEX Operating Limits With Four Reactor Coolant Pumps Operating MILLSTONE - UNIT 2 TRM 8.1-11 LBDCR 14-MP2-004 April 1, 2014