NL-13-0646, Cycle 17 Core Operating Limits Reports

Cycle 17 Core Operating Limits Reports

ML13098A205
Person / Time
Site:	Vogtle
Issue date:	04/05/2013
From:	Pierce C Southern Co, Southern Nuclear Operating Co
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
NL-13-0646
Download: ML13098A205 (13)

Text

Charles R. Pierce Southern Nuclear Regulatory Affairs Director Operating Company, Inc.

40 Inverness Center Parkway Post Office Box 1295 Birmingham. Alabama 35201 Tel 205.992.7872 Fax 205.992.7601 April 5, 2013 SOUIHERN'\

COMPANY Docket Nos.: 50-425 [\1 L-1 3-0646 U . S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington , D. C. 20555-0001 Vogtle Electric Generating Plant Unit 2 Cycle 17 Core Operating Limits Report Ladies and Gentlemen:

In accordance with Technical Specification 5.6.5.d , Southern Nuclear Operating Company submits the enclosed Core Operating Limits Report (COLR) for Vogtle Electric Generating Plant (VEGP) Unit 2 Cycle 17, Version 1.

This letter contains no NRC commitments. If you have any questions, please contact Ken McElroy at (205) 992-7369 .

Respectfully submitted, C . R. Pierce Regulatory Affairs Director CRP/RMJ/lac

Enclosure:

Core Operating Limits Report, VEGP Unit 2 Cycle 17, Version 1 cc: Southern l\luclear Operating Company Mr. S. E. Kuczynski, Chairman, President & CEO Mr. D. G. Bost, Executive Vice President & Chief Nuclear Officer Mr. T. E. Tynan , Vice President - Vogtle Mr. B. L. Ivey, Vice President - Regulatory Affairs Mr. B. J. Adams, Vice President - Fleet Operations RType: CVC7000 U. S. Nuclear Regulatory Commission Mr. V. M. McCree, Regional Administrator Mr. R. E. Martin, NRR Senior Project Manager - Vogtle Mr. L. M. Cain, Senior Resident Inspector - Vogtle

Vogtle Electric Generating Plant Unit 2 Cycle 17 Core Operating Limits Report Enclosure Core Operating Limits Report, VEGP Unit 2 Cycle 17, Version 1

1.0 (COLR) for VEGP Unit 2 17 has prepared in the Technical Specification The Requirement affected by is listed 13.1.1 MARGIN - MODES 1 and 2 affected by this report are below:

3.1.1 SHUTDOWN 3, 4 and 5 3.1.3 Moderator Temperature Coefficient 3.1.5 Shutdown Insertion Limits 3.1.6 Control Bank Insertion 3.2.1 Heat Flux Hot Channel Factor -

3.2.2 Enthalpy Rise Hot Channnel Factor 3.2.3 Axial Flux Difference 3.9.1 Boron Concentration 1 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 17 MARCH 2013 2.0 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 NRC-approved methodologies including those specified in Technical Specification 5.6.5.

2.1 SHUTDOWN MARGIN - MODES I and 2 (Technical Requirement 13.1.1) 2.1.1 The SHUTDOWN MARGIN shall be greater than or equal to 1.30 percent ~k/k.

2.2 SHUTDOWN MARGIN - MODES 3, 4 and 5 (Specification 3.1.1) 2.2.1 The SHUTDOWN MARGIN shall be greater than or equal to the limits shown in Figures 1 and 2.

2.3 Moderator Temperature Coefficient (Specification 3. I .3) 2.3.1 The Moderator Temperature Coefficient (MTC) limits are:

The BOll ARO/HZP-MTC shall be less positive than +0.7 x 10'4 ~k/k;oF for power levels up to 70% RTP with a linear ramp to 0 ~k/k/oF at 100% RTP.

The EOLI ARO/RTP-MTC shall be less negative than -5.50 x 10'4 ~kJk/oF.1 2.3.2 The MTC Surveillance limits are:

The 300 ppm/ARO/RTP-MTC should be less negative than or equal to

-4.75 x 10'4 ~k/k/OF.I The 60 ppm! ARO/RTP-MTC should be less negative than -5.35 x 10,4 ~k/k;Op.'

where: BOL stands for Beginning of Cycle Life ARO stands for All Rods Out HZP stands for Hot Zero THERMAL POWER EOL stands for End of Cycle Ufe RTP stands for RATED THERMAL POWER I Applicable for full-power T-average of583.8 to 586.8 °P.

Page 2 of 11

2.4 3.1 2.4.1 shall be withdrawn to a position orp"tpr than or to 225 2.5 =="-'=-"=="-==="'-=== (Specification 3. I.6) 2.5.1 control rod banks shall be in physical as shown in 3.

FQ(Z) (Specification 3.2.1)

RTP F

<_Q_. forP>O.5

- P P=----

RATED THERMAL 2.6.2 2.50 K(Z) is In 4.

F RTP .

2.6.4 < Q for P > 0.5

- p*W(Z)

~--=---- for P ~ 0.5 2.6.5 W(Z) are provided in Table 2.

2.6.6 FQ(Z) penalty factors are provided in l.

Page 3 ofll

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 17 MARCH 2013 N

2.7 ~===-===-,--,,=-"-"-'=,,-===~== - F ~H 3.2.2)

.(1-P))

THERMAL POWER where: P RATED THERMAL POWER 2.7.2 2.7.3 PFM/=O.3 2.8 3.2.3)

The Axial Acceptable Operation Limits are provided in 5.

2.9 3.9.1)

The boron concentration be greater than or equal to 1867 ppm?

2 bounds the (all rods in most rod) and subcriticality (all rods out) over the cycle. This concentration includes boron to address B 10 depletion.

4 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 17 MARCH 2013 Table 1 FQ(Z) PENALTY FACTOR Cycle Bumup FQ(Z) Penalty Factor (MWD/MTU) 5583 1.020 5800 1.023 6017 1.028 6234 1.028 6452 1.027 6669 1.026 6886 1.028 7104 1.033 7321 1.038 7538 1.035 7756 1.030 7973 1.025 8190 1.021 8407 1.020 Notes:

1. The Penalty Factor, to be applied to FQ(Z) in accordance with SR 3.2.1.2, is the maximum factor by which FQ(Z) is expected to increase over a 39 EFPD interval (surveillance interval of 31 EFPD plus the maximum allowable extension not to exceed 25% of the surveillance interval per SR 3.0.2) starting from the burnup at which the FQ(Z) was determined.

2. Linear interpolation is adequate for intermediate cycle burnups.

3. For all cycle burnups outside the range of the table, a penalty factor of 1.020 shall be used.

Page 5 of 11

Table 2 RAOCW(Z)

Axial Elevation 150 4000 12000 20000 Point (feet) MWD/MTV MWD/MTU MWD/MTV MWD/MTV 12.08 1.0000 1.0000 1.0000 1.0000 2 11.88 1.0000 1.0000 1.0000 1.0000 3 11.68 1.0000 1.0000 1.0000 1.0000 4 liAS 1.0000 1.0000 1.0000 1.0000 5 11.27 1.0000 1.0000 1.0000 1.0000 6 11.07 1.2547 1.3054 1.2452 1.2179 7 10.87 1.2582 1.2948 ),2438 1.2071 8 10.67 1.2584 1.2846 1.2414 1.1999 9 10.47 1.2540 1.2748 1.2370 1.1969 10 10.27 1.2478 1.2614 1.2396 1.1972 II 10.07 1.2531 1.2546 1.2443 1.1977 12 9.86 1.2632 1.2512 1.2443 1.1976 13 9.66 1.2674 1.2441 1.2395 1.1914 14 9A6 1.2697 1.2370 1.2348 1,1965 15 9.26 1.2621 1.2261 1.2263 1.1941 16 9.06 1.2492 1.2132 1.2176 1.2016 17 8.86 1.2379 1.2005 1.2087 1.2202 18 8.66 1.2342 1.1933 1.2031 1.2349 19 8A6 1.2398 1.1939 1.2091 1.2469 20 8.25 1.2424 Ll921 1.2130 1.2592 21 8.05 1.2475 U929 l.2185 1.2687 22 7.85 1.2532 1.1946 1.2245 1.2785 23 7.65 1.2545 1.1929 1.2269 1.2902 24 7.45 1.2530  !.I 893 1.2269 1.2974 25 7.25 1.2487 1.1836 1.2244 1.3012 26 7.05 1.2419 1.1762 1.2196 1.30)6 27 6.84 1.2328 1.1672 1.2128 1.2989 28 6.64 1.2220 1.1569 1.2039 1.2932 29 6.44 1.2t05 1.1468 1.1934 1.2848 30 6.24 1.1984 1.1408 Ll831 1.2738 31 6.04 1.1845 1.1355 1.1700 1.2601 32 5.84 1.I709 1.1186 1.1623 1.2452 33 5.64 1.1605 1.1266 1.1614 1.2344 34 5.44 1.1552 1.1369 1.1665 1.2313 35 5.23  !.IS77 1.1466 1.1720 1.2326 36 5.03 1.1621 1.1548 1.1763 1.2341 37 4.83 1.1650 U627 1.1794 1.2333 38 4.63 1.1674 1.1695 1.1811 1.2305 39 4.43 1.1699 1.1754 1.1816 1.2255 40 4.23 1.1726 1.1805 1.1808 1.2186 41 4.03 1.1744 1.1841 1.1785 1.2088 42 3.83 1.1749 1.1880 1.1788 1.2003 43 3.62 1.1745 1.1934 1.1828 1.1950 44 3.42 1.1730 1.1986 1.1849 1.1879 45 3.22 1.1694 1.2038 1.1861 J.l795 46 3.02 1.1728 1.2120 1.1860 1.1722 47 2.112 1.1836 1.2285 1.1877 1.1716 48 2.62 1.1956 1.2527 1.1956 1.1793 49 2.42 1.2072 1.2768 1.2044 1.1895 50 2.21 1.2224 l.3007 1.2131 1.1996 51 2.01 1.2388 1.3243 1.2218 1.2097 52 1.81 1.2548 1.3472 1.2307 l.2199 53 1.61 1.2705 1.3692 1.2400 1.2304 54 1.41 1.2857 1.3900 1.2497 1.2411 55 1.21 1.3004 104094 1.2590 1.2519 56 1.01 1.J1J7 1.4261 1.2673 1.2622 57 0.81 1.0000 1.0000 1.0000 1.0000 58 0.60 1.0000 1.0000 1.0000 1.0000 59 0.40 1.0000 1.0000 1.0000 1.0000 60 0.20 1,0000 1.0000 1.0000 1.0000 61 0.00 1.0000 1.0000 1.0000 1.0000 Top and Boltom 5 POints Excluded per Technical Specification B3.2.1.

These W(Z) values are consistent with 5, and are valid over the range from to 586.8°F.

6 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 17 MARCH 2013 FIGURE 1 REQUIRED SHUTDOWN MARGIN FOR MODES 3 AND 4 (FOUR LOOPS FILLED AND VENTED AND AT LEAST ONE REACTOR COOLANT PUMP RUNNING) 5.0 I

4.0 I I

ACCEPTABLE OPERATING REGION

.!t!

........ (2 00, .1 P)

.!t!

<l 3 . 0 I I ./'

0\0 V I ./'

t V

Z H

REQUIRED SHUTDOWN MARGIN V C!)

,I V

'e

~

~

(IE 00  :,)

~/

~ I /

0 2.0 Q

E-I

~til / VI

/ II

// i I IUNACCEPTABLE OPERATING REGION I

(~5C, .3 0 )

1 II 1.0 I

0.0 o 500 1000 1500 2000 2500 RCS BORON CONCENTRATION (ppm)

Page 7 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 17 MARCH 2013 FIGURE 2 REQUIRED SHUTDOWN MARGIN FOR MODES 4 AND 5 (MODE 4 WHEN FIGURE 1 NOT APPLICABLE) 5.0 (2 00 I 0}YV i

/ / 1 i

/

/

4.0 , V IACCEPTABLE OPERATING REGION I V

/

V VV

.!.! /

V

<l 3.0

~o Z

IREQUIRED SHUTDOWN MARGIN I / (1 50, 08 ~)

H

{!)

~

I

/ I

~ I / I

~

0 2.0

/ I Q

Eo<

D

/

Il til / I vr I

UNACCEPTABLE OPERATING REGION 1.0 / I

(~6 ( I or )

I 0.0 I o 500 1000 1500 2000 2500 RCS BORON CONCENTRATION (ppm)

Page 8 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 17 MARCH 2013 FIGURE 3 ROD BANK INSERTION LIMITS VERSUS % OF RATED THERMAL POWER (Fully WIthdrawn) 2 20 I V ( .0% 225 / 78 * )9, .: )

/ V V

2 00 I- I

-- /

s:: BANK B

~ 1 80 / I 113 / I 1/ I I 1-1 V / i

'0

..c:: V V I 61  % 61 1 60 V / I oW .01% I ( .( I(

.,-l I

~

V til 0.

2 140 A Ul I

/

BANK C 5 l20 H V 1/

V

/

E-< / /

H Ul V IL V

~ 100 V I

/

/ / BANK D 60 / 1/ I V /

V V

/ /

40 C%, 461) /

I V - f-I 20 I( 3 .2% (I) o 1/

0 10 20 30 40 50 60 70 80 90 1 o POWER (% of Rated Thermal Power)

'Fully withdrawn shall be the condition where control rods are at a position within the interval ~ 225 and :-s; 231 steps withdrawn.

NOTE: The Rod Bank Insertion Limits are based on the control bank withdrawal sequence A, B, C, 0 and a control bank tip-to-tip distance of 115 steps.

Page 9 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 17 MARCH 2013 FIGURE 4 K(Z) - NORMALIZED FQ(Z) AS A FUNCTION OF CORE HEIGHT 1.4 1.2

~

o E-<

U

~ 1. 0

~

H

~

r.:I Po 0.8 FQ = 2 .50 Q

r.:I CORE

~

H HT. K(Z)

~

0.00 1. 00 00 . 6 6.00 1. 00 Z 12.0 .925 0.2 0.0 o 2 4 6 8 10 12 CORE HEIGHT (feet)

Page 10 of 11

CORE OPERATING LIMITS REPORT, VEGP UNIT 2 CYCLE 17 MARCH 2013 FIGURE 5 AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF % RATED THERMAL POWER FORRAOC 120 110

( IS, 100) (+10, 100) 100 1 1\

"'OJ~" 90 UIJAC I'EP1 ABI E I \ UN Cc:E PTl' BLE 0

Il< II \

III 80 I i 1\

Ei

"'OJ" I ,I I \

..c::

E-i 70 I A r.CE PTA! LE

\

"d 1\

OJ

.IJ III p:: 60 I \

~ I \

0 0'P 50 V 1\

p::

1 (- 3 0, 50) I (+26, 50)

~ 40 0

Il<

30 20 10

-- r---

o

-50 -40 -30 -20 -10 o 10 20 30 40 50 AXIAL FLUX DIFFERENCE (percent ~I)

Page 11 of 11