ML19317D460

Core Operating Limits Report; Surry 1 Cycle 30 Pattern Apo Revision 0

ML19317D460
Person / Time
Site:	Surry
Issue date:	11/07/2019
From:	Standley B Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
19-440
Download: ML19317D460 (10)

Text

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 November 7, 2019 United States Nuclear Regulatory Commission Serial No.: 19-440 Attention: Document Control Desk NRA/GDM: RO Washington, D.C. 20555 Docket No.: 50-280 License No.: DPR-32 VIRGINIA ELECTRIC AND POWER COMPANY (DOMINION ENERGY VIRGINIA)

SURRY POWER STATION UNIT 1 CORE OPERATING LIMITS REPORT SURRY 1 CYCLE 30 PATTERN APO REVISION 0 Pursuant to Surry Technical Specification (TS) 6.2.C, attached is a copy of the Core Operating Limits Report (COLR) for Surry Power Station Unit 1, Cycle 30, Pattern APO, Revision 0.

If you have any questions or require additional information, please contact Mr. Gary Miller at (804) 273-2771.

Sincerely, B. E. Standley, Director Nuclear Regulatory Affairs Dominion Energy Services, Inc. for Virginia Electric and Power Company

Attachment:

Core Operating Limits Report, Surry Unit 1 Cycle 30, Pattern APO, Revision 0 Commitment Summary: There are no new commitments contained in this letter.

Serial No.19-440 Docket No. 50-280 COLR S1C30 Page 2 of 2 cc: U.S. Nuclear Regulatory Commission Region II Marquis One Tower 245 Peachtree Center Avenue, NE Suite 1200 Atlanta, Georgia 30303-1257 Mr. Vaughn Thomas NRC Project Manager U. S. Nuclear Regulatory Commission One White Flint North Mail Stop 04 F-12 11555 Rockville Pike Rockville, Maryland 20852-2738 Mr. G. Edward Miller NRC Senior Project Manager U. S. Nuclear Regulatory Commission One White Flint North Mail Stop 09 E-3 11555 Rockville Pike Rockville, Maryland 20852-2738 NRC Senior Resident Inspector Surry Power Station

Serial No.19-440 Docket No. 50-280 COLR S1C30 Attachment CORE OPERATING LIMITS REPORT Surry Unit 1 Cycle 30 Pattern APO Revision 0 Virginia Electric and Power Company (Dominion Energy Virginia)

Serial No.19-440 Docket No. 50-280 COLR S1C30 Attachment

1.0 INTRODUCTION

This Core Operating Limits Report (COLR) for Surry Unit 1 Cycle 30 has been prepared in accordance with the requirements of Surry Technical Specification 6.2.C.

The Technical Specifications affected by this report are:

TS 2.1- Safety Limit, Reactor Core TS 2.3.A.2.d- Overtemperature T TS 2.3.A.2.e - Overpower T TS 3.l.E - Moderator Temperature Coefficient TS 3.12.A.1, TS 3.12.A.2, TS 3.12.A.3 and TS 3.12.C.3.b.l(b) - Control Bank Insertion Limits TS 3.12.A.l.a, TS 3.12.A.2.a, TS 3.12.A.3.c and TS 3.12.G-Shutdown Margin TS 3.12.B.1 and TS 3.12.B.2 - Power Distribution Limits (Heat Flux Hot Channel Factor and Nuclear Enthalpy Rise Hot Channel Factor)

TS 3.12.F - DNB Parameters TS Table 4.1-2A-Minimum Frequency for Equipment Tests: Item 22- RCS Flow

2.0 REFERENCES

1. VEP-FRD-42, Rev. 2.2-A, "Reload Nuclear Design Methodology," October 2017.

Methodology for:

TS 2.1- Safety Limit, Reactor Core TS 3.1.E - Moderator Temperature Coefficient TS 3.12.A.1, TS 3.12.A.2, TS 3.12.A.3 and TS 3.12.C.3.b.l(b) - Control Bank Insertion Limit TS 3.12.A.l.a, TS 3.12.A.2.a, TS 3.12.A.3.c and TS 3.12.G-Shutdown Margin TS 3.12.B.1 and TS 3.12.B.2 - Heat Flux Hot Channel Factor and Nuclear Enthalpy Rise Hot Channel Factor TS 3.12.F- DNB Parameters TS Table 4.l-2A- Minimum Frequency for Equipment Tests: Item 22- RCS Flow

2. WCAP-16009-P-A, "Realistic Large Break LOCA Evaluation Methodology Using the Automated Statistical Treatment of Uncertainty Method (ASTRUM)," (Westinghouse Proprietary), January 2005.

Methodology for:

TS 3.12.B.1 and TS 3.12.B.2 - Heat Flux Hot Channel Factor

3. WCAP-10054-P-A, "Westinghouse Small Break ECCS Evaluation Model Using the NOTRUMP Code," (Westinghouse Proprietary), August 1985.

Methodology for:

TS 3.12.B.1 and TS 3.12.B.2 - Heat Flux Hot Channel Factor Page 1 of 7

Serial No.19-440 Docket No. 50-280 COLR S1C30 Attachment

4. WCAP-10079-P-A, "NOTRUMP, A Nodal Transient Small Break and General Network Code,"

(Westinghouse Proprietary), August 1985.

Methodology for:

TS 3.12.B.1 and TS 3.12.B.2 - Heat Flux Hot Channel Factor

5. WCAP-12610-P-A, "VANTAGE+ Fuel Assembly Report," (Westinghouse Proprietary), April 1995.

Methodology for:

TS 3.12.B.1 and TS 3.12.B.2 - Heat Flux Hot Channel Factor

6. WCAP-12610-P-A and CENPD-404-P-A, Addendum 1-A, "Optimized ZIRLO," (Westinghouse Proprietary), July 2006.

Methodology for:

TS 3.12.B.1 and TS 3.12.B.2 - Heat Flux Hot Channel Factor

7. VEP-NE-2-A, Rev. 0, "Statistical DNBR Evaluation Methodology," June 1987.

Methodology for:

TS 3.12.B.1 and TS 3.12.B.2 - Nuclear Enthalpy Rise Hot Channel Factor

8. DOM-NAF-2-P-A, Rev. 0.3, "Reactor Core Thermal-Hydraulics Using the VIPRE-D Computer Code," including Appendix B, "Qualification of the Westinghouse WRB-1 CHF Correlation in the Dominion VIPRE-D Computer Code," and Appendix D, "Qualification of the ABB-NV and WLOP CHF Correlations in the Dominion VIPRE-D Computer Code,"

September 2014.

Methodology for:

TS 3.12.B.1 and TS 3.12.B.2 - Nuclear Enthalpy Rise Hot Channel Factor

9. WCAP-8745-P-A, "Design Bases for Thermal Overpower Delta-T and Thermal Overtemperature Delta-T Trip Function," September 1986.

Methodology for:

TS 2.3 .A.2.d - Overtemperature LiT TS 2.3 .A.2.e - Overpower LiT 3.0 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 Technical Specification 6.2.C and repeated in Section 2.0.

3.1 Safety Limit. Reactor Core (TS 2.1)

The Reactor Core Safety Limits are presented in Figure A-1.

Page 2 of 7

Serial No.19-440 Docket No. 50-280 COLR S1C30 Attachment 3.2 Overtemperature AT (TS 2.3 .A.2.d)

Where:

LiTis measured RCS Li T, 0 P.

Li To is the indicated LiT at RATED POWER, 0 P.

1 sis the Laplace transform operator, sec-

• Tis the measured RCS average temperature (Tavg), 0 P.

T' is the nominal Tavg at RATED POWER,::; 573.0°F.

P is the measured pressurizer pressure, psig.

P' is the nominal RCS operating pressure 2: 2235 psig.

0 Kr ::; 1.1425 K2 2: 0.01059 / P K3 2: 0.000765 /psig tr 2: 29. 7 seconds 12 ::; 4.4 seconds f(M) 2: 0.0268 { (q1 - qb)}, when (~t - qb) < -24.0% RA TED POWER 0, when -24.0% RATED POWER::; (q1- qb)::; +8.0% RATED POWER 0.0188 {(q1 - qb)- 8.0}, when (q1- qb) > +8.0% RATED POWER Where q1 and qb are percent RATED POWER in the upper and lower halves of the core, respectively, and q1 + qb is the total THERMAL POWER in percent RATED POWER.

3.3 Overpower AT (TS 2.3.A.2.e)

Where:

Li T is measured RCS Li T, 0 P.

Li To is the indicated LiT at RATED POWER, 0 P.

sis the Laplace transform operator, sec- 1*

Tis the measured RCS average temperature (Tavg), 0 P.

T' is the nominal Tavg at RATED POWER,::; 573.0°F.

K4::; 1.0965 Ks 2: 0.0198 / 0 P for increasing Tavg K6 2: 0.001074 / 0 P for T > T' 2: 0 / 0 P for decreasing T avg 2: 0 for T ::; T' t3 2: 9.0 seconds f( M) = as defined above for OTLi T Page 3 of 7

Serial No.19-440 Docket No. 50-280 COLR S1C30 Attachment 3.4 Moderator Temperature Coefficient (TS 3. l .E)

The Moderator Temperature Coefficient (MTC) limits are:

+6.0 pcm/°F at less than 50 percent of RATED POWER, and

+6.0 pcm/°F at 50 percent of RATED POWER and linearly decreasing to O pcm/°F at RATED POWER 3.5 Control Bank Insertion Limits (TS 3 .12.A.1, TS 3 .12.A.2, TS 3 .12.A.3, and TS 3.12.C.3.b. l(b))

3.5.1 The control rod banks shall be limited in physical insertion as shown in Figure A-2.

3 .5 .2 The rod insertion limit for the A and B control banks is the fully withdrawn position as shown on Figure A-2.

3.5.3 The rod insertion limit for the A and B shutdown banks is the fully withdrawn position as shown on Figure A-2.

3.6 Shutdown Mar1:in (TS 3.12.A. l.a, TS 3.12.A.2.a, TS 3.12.A.3.c and TS 3.12.G)

Shutdown margin (SDM) shall be~ 1.77 3/4~k/k.

3.7 Power Distribution Limits (TS 3.12.B.1 and TS 3.12.B.2)

3. 7 .1 Heat Flux Hot Channel Factor - FQ(z)

CFQ FQ(z) ~ p K(z)f or P > 0.5 CFQ FQ(z) ~ ~ K(z)for P ~ 0.5 THERMAL POWER where: P =

RATED POWER CFQ=2.5 K(z) = 1.0 for all core heights, z Page 4 of 7

Serial No.19-440 Docket No. 50-280 COLR S1C30 Attachment 3.7.2 Nuclear Enthalpy Rise Hot Channel Factor - FL1H(N)

FL1H(N) ~ CFDH * {1 + PFDH(l - P)}

THERMAL POWER where: P = -RATED

- - -POWER---

CFDH= 1.635 PFDH=0.3 3.8 DNB Parameters (TS 3.12.F and TS Table 4.1-2A)

Departure from Nucleate Boiling (DNB) Parameters shall be maintained within their limits during POWER OPERATION:

• Reactor Coolant System Tavg ~ 577.0 °F

• Pressurizer Pressure 2'.: 2205 psig

• Reactor Coolant System Total Flow Rate 2'.: 273,000 gpm (Tech Spec Limit) and 2'.: 274,000 gpm (COLR Limit)

Page 5 of 7

Docket No. 50-280 COLR S1C30 Attachment Figure A-1 REACTOR CORE SAFETY LIMITS THREE LOOP OPERATION, 100% FLOW 670 ..

660 u..

~ 650 Cl)

I..

b.O Cl)

C Cl)

I..

s

,tJ

~ 620 Cl)

C.

E 610 Cl) 1-(1) 600 b.O n,

I..

Cl)

~

Cl)

V,

~ 570 ---+-------+----1-------1-------+----1-------1-------+----+----4----+-----l

>

560 550 .

0 10 20 30 40 50 60 70 80 90 100 110 120 Percent of Rated Power Page 6 of 7

Docket No. 50-280 COLR S1C30 Attachment Figure A-2 Surry 1 Cycle 30 Rod Group Insertion Limits Max w/d position = 227 steps 230  !

220 ~ 0.475,227 210

/

200

/

190

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.A V C-Bc nk 1.0, 183 180 170 ,/

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~/

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3 V) 160 150 V ~v

a.

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Cl)

V) 140 0, 151

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r::."'

0 130 ~

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'iii 0

0.. 120

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a.

I 0I,,,

110

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"C 0 100 D-Bank

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90 ,/

80 /

70

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50

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40

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20 0, 23 10 0

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Fraction of Rated Thermal Power Page 7 of 7