L-06-062, Cycle 18 Core Operating Limits Report

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Cycle 18 Core Operating Limits Report
ML061100184
Person / Time
Site: Beaver Valley
Issue date: 04/14/2006
From: Lash J
FirstEnergy Nuclear Operating Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
L-06-062
Download: ML061100184 (14)


Text

FENOC FirstEnergy Nuclear Operating Company James H. Lasjh 724-682-5234 Site Vice President Fax: 724-643-8069 April iZ- 2006 L-06-062 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555-0001

Subject:

Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Cycle 18 Core Operating Limits Report Beaver Valley Power Station, Unit No. 1 completed the seventeenth cycle of operation on February 13, 2006. This letter provides a copy of the Cycle 18 Core Operating Limits Report (COLR) in accordance with Technical Specification 6.9.5.d.

This revision of the COLR includes changes due to the Cycle 18 reload design and changes due to four Unit No. 1 license amendments implemented during the Spring 2006 refueling outage. These license amendments are 271 (Containment Conversion), 272 (Best Estimate LOCA), both of which were issued on February 6, 2006, 273 (Replacement Steam Generators) which was issued on February 9, 2006, and 274 (Relaxed Axial Offset Control) which was issued on February 27, 2006.

The Cycle 18 COLR is being submitted in accordance with Technical Specification 6.9.5.d. The COLR has been updated for this cycle by incorporating the changes related to license amendments 271, 272, 273 and 274, as well as the reload-specific axial flux difference limits and FQ Surveillance W(Z) factors associated with the Relaxed Axial Offset Control License Amendment.

No new regulatory commitments are contained in this submittal. If there are any questions or if additional information is required, please contact Mr. Gregory A. Dunn, Manager, FENOC Fleet Licensing, at (330) 315-7243.

Sincerely, ames H. Lash

Beaver Valley Power Station, Unit No. 1 Unit 1 Cycle 18 Reload and Core Operating Limits Report L-06-062 Page 2

Enclosure:

Beaver Valley Power Station Unit No. 1 Cycle 18 Core Operating Limits Report c: Mr. T. G. Colburn, NRR Senior Project Manager Mr. P. C. Cataldo, NRC Senior Resident Inspector Mr. S. J. Collins, NRC Region I Administrator Mr. D. A. Allard, Director BRP/DEP Mr. L. E. Ryan (BRP/DEP)

Beaver Valley Power Station Unit No.1 Cycle 18 Core Operating Limits Report

BVPS-I LICENSING REQUIREMENTS MANUAL 4.1 CORE OPERATING LIMITS REPORT This Core Operating Limits Report provides the cycle specific parameter limits developed in accordance with the NRC approved methodologies specified in Technical Specification Administrative Control 6.9.5.

Specification 3.1.3.5 Shutdown Rod Insertion Limits The shutdown rods shall be withdrawn to at least 225 steps.*

Specification 3.1.3.6 Control Rod Insertion Limits Control Banks A and B shall be withdrawn to at least 225 steps.*

Control Banks C and D shall be limited in physical insertion as shown in Figure 4.1-1.*

Specification 3.2.1 Axial Flux Difference The Axial Flux Difference (AFD) acceptable operation limits are provided in Figure 4.1-2.

Specification 3.2.2 Heat Flux Hot Channel Factor - Fp(Z) Limits The Eleat Flux Hot Channel Factor - FQ(Z) limit is defined by:

FQ(Z) < [CFQ

  • K(Z) for P > 0.5 FQ(Z) <ICFQ *K(Z) for P < 0.5

[ 0.5 J Where: CFQ = 2.40 P THERMAL POWER RATED THERMAL POWER K(Z) = the function obtained from Figure 4.1-3.

F (Z) = FM (Z)

  • 1.0815 Q

FQ (Z) = F (Z)

  • W(Z)

The W(Z) values are provided in Table 4.1-1.

The FQ(Z) penalty function, applied when the analytic FQ(Z) function increases from one monthly measurement to the next, is provided in Table 4.1-2.

  • As indicated by the group demand counter BEAVER VALLEY- UNIT 1 4.1-1 COLR 18 Revision 51

BVPS-1 LICENSING REQUIREMENTS MANUAL Specification 3.2.3 Nuclear Enthalpy Rise Hot Channel Factor FNAH I FNAAH: CFAH * ( + PFH (I-P))

Where: CFAH = 1.62 PFH = 0.3 P= THERMAL POWER RATED THERMAL POWER BEAVER VALLEY - UNIT 1 4.1-2 COLR 1;3 Revision 51

BVPS-I LICENSING REQUIREMENTS MANUAL 200 150 I-.

100 50 0

0 20 40 60 80 100 Relative Power (Percent)

FIGURE 4.1-1 CONTROL ROD INSERTION LIMITS BEAVER VALLEY - UNIT I 4.1-3 COLR 1.3 Revision 51

BVPS-1 LICENSING REQUIREMENTS MANUAL 120

- I I1~ -1 11- !f 110 100 I I

(-14, 10)(+10, I I 100)

UNACCEPTABLE I - l lUNACCEPTABLE 90 OPERATION PERATION 80 70 N ACCEPTABLE l lOPERAIN L

zI1 60

_ lI I 1 \____

50

(-31,50) (2,0 40 I II_ I II I I I 3(0 2(1

_ II 1( __ 1 lH I _T I ___

c _ _ _ I I - -1 - _ _

-60 -40 -20 0 20 40 6(

Axial Flux Difference (Delta 1)%

FIGURE 4.1-2 AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF PERCENT OF RATED THERMAL POWER FOR RAOC I BEAVE:R VALLEY - UNIT 1 4.1-4 COLR 1.3 Revision 51

BVPS-1 LICENSING REQUIREMENTS MANUAL 1.2 1.0 0.8 9 0.6 0.4 0.2 0.0 C0 2 4 6 8 10 12 Core Height (feet)

FIGURE 4.1-3 FQT NORMALIZED OPERATING ENVELOPE, K(Z)

BEAVER VALLEY - UNIT 1 4.1-5 COLR 1.3 Revision 51

BVPS-I LICENSING REQUIREMENTS MANUAL Specification 3.3.1.1 Reactor Trip System Instrumentation Setpoints, Table 3.3-1 Table Notations A and B Overtemperature AT Setpoint Parameter Values:

Parameter Value Overtemperature AT reactor trip setpoint KI < 1.242 Overtemperature AT reactor trip setpoint Tavg coefficient K2 2 0.0 183/ 0 F Overtemperature AT reactor trip setpoint pressure coefficient K3 2 0.001/psia Tavg at RATED THERMAL POWER T' < 580.OOF(I)

Nominal Pressurizer Pressure P' 22250 psia Measured reactor vessel average temperature lead/lag time constants T, 2 30 secs T2 < 4 secs Measured reactor vessel AT lag time constant r4 < 6 secs Measured reactor vessel average temperature lag time constant rs < 2 secs f (Al) is a function of the indicated difference between top and bottom detectors of the power-range nuclear ion chambers; with gains to be selected based on measured instrument response during plant startup tests such that:

(i) for qt - qb between -37 percent and +15 percent, f (AI) = 0 (where qt and qb are percent RATED THERMAL POWER in the top and bottom halves of the core respectively, and qt +

qb is total THERMAL POWER in percent of RATED THERMAL POWER).

(ii) for each percent that the magnitude of (qt - qb) exceeds -37 percent, the AT trip setpoint shall be automatically reduced by 2.52 percent of its value at RATED THERMAL POWER.

(iii) For each percent that the magnitude of (qt - qb) exceeds +15 percent, the AT trip setpoint shall be automatically reduced by 1.47 percent of its value at RATED THERMAL POWER.

(1) T' represents the cycle-specific Full Power Tavg value used in core design (576.2 °F).

BEAVER VALLEY- UNIT 1 4.1-6 COLR 13 Revision 51

BVPS-1 LICENSING REQUIREMENTS MANUAL Overpower AT Setpoint Parameter Values:

Parameter Value Overpower AT reactor trip setpoint K4 < 1.085 I Overpower AT reactor trip setpoint Tavg rate/lag coefficient K5 2 0.02/0 F for increasing average temperature K5=0/0 F for decreasing average temperature I Overpower AT reactor trip setpoint Tavg heatup coefficient K6 2 0.0021/ 0 F for I T>T" K6 = 0/0 F for T < T" Tavg at RATED THERMAL POWER T" < 580.OOF(I)

Measured reactor vessel average temperature rate/lag time constant T3 2 10 secs Measured reactor vessel AT lag time constant ¶4 < 6 secs Il Measured reactor vessel average temperature lag time constant T5 < 2 secs Specification 3.2.5 DNB Parameters Parameter Indicated Value Reactor Coolant System Tavg Tavg < 583.60F( 2 ) I Pressurizer Pressure Pressure 2 2218 psia(3)

Reactor Coolant System Total Flow Rate Flow > 267,300 gpm(4)

(1) T" represents the cycle-specific Full Power Tavg value used in core design (576.2 °F). I (2) The Reactor Coolant System (RCS) Tavg value includes allowances for rod control operation and I verification via control board indication.

(3) The pressurizer pressure value includes allowances for pressurizer pressure control operation and I verification via control board indication.

(4) Th - RCS total flow rate includes allowances for normalization of the cold leg elbow taps wilh a I beginning of cycle precision RCS flow calorimetric measurement and verification on a periodic basis via control board indication.

BEAVER VALLEY - UNIT 1 4.1-7 COLR 13 Revision 51

BVPS-1 LICENSING REQUIREMENTS MANUAL on 0 0.2 0.4 0.6 0.8 1 1.2 .1.4 FRACTION OF RATED THERMAL POWER Figure 4.1-5 REACTOR CORE SAFETY LIMIT THREE LOOP OPERATION (Technical Specification Safety Limit 2.1.1)

BEAVER VALLEY - UNIT 1 4.1-8 48COLR 1'3 Revision 51

BVPS-1 LICENSING REQUIREMENTS MANUAL Table 4.1-1 (Page 1 of 2)

FQ Surveillance W(Z) Function versus Burnup Exclusion Axial Elevation 150 3000 10000 16000 Zone Point (feet) MWD/MTU MWD/MTU MWD/MTU MWD/MTUJ

  • 1 12.00 1.0000 1.0000 1.0000 1.0000
  • 2 11.80 1.0000 1.0000 1.0000 1.0000
  • 3 11.60 1.0000 1.0000 1.0000 1.0000
  • 4 11.40 1.0000 1.0000 1.0000 1.0000
  • 5 11.20 1.0000 1.0000 1.0000 1.0000

_ 6 11.00 1.0000 1.0000 1.0000 1.0000

  • 7 10.80 1.0000 1.0000 1.0000 1.0000
  • 8 10.60 1.0000 1.0000 1.0000 1.0000
  • 9 10.40 1.0000 1.0000 1.0000 1.0000 10 10.20 1.2273 1.2990 1.2429 1.2529 11 10.00 1.2153 1.2811 1.2330 1.2252 12 9.80 1.2026 1.2736 1.2223 1.2088 13 9.60 1.1891 1.2688 1.2104 1.2014 14 9.40 1.1772 1.2630 1.2001 1.1940 15 9.20 1.1738 1.2536 1.1937 1.1945 16 9.00 1.1824 1.2416 1.1912 1.2163 17 8.80 1.1923 1.2424 1.1984 1.2353 18 8.60 1.2001 1.2507 1.2127 1.2504 19 8.40 1.2056 1.2584 1.2269 1.2637 20 8.20 1.2091 1.2624 1.2375 1.2742 21 8.00 1.2104 1.2637 1.2454 1.2819 22 7.80 1.2097 1.2622 1.2505 1.2868

= 23 7.60 1.2069 1.2580 1.2528 1.2889

= 24 7.40 1.2026 1.2514 1.2525 1.2883 25 7.20 1.1977 1.2426 1.2497 1.2849 26 7.00 1.1930 1.2316 1.2444 1.2789 27 6.80 1.1869 1.2187 1.2369 1.2735

= 28 6.60 1.1791 1.2040 1.2272 1.2673 29 6.40 1.1700 1.1879 1.2156 1.2581 30 6.20 1.1597 1.1706 1.2022 1.2467 Note: Top and Bottom 15% Excluded BEAVER VALLEY - UNIT 1 4.1-9 COLR 1'3 Revision 51

BVPS-1 LICENSING REQUIREMENTS MANUAL Table 4.1-1 (Page 2 of 2)

FQ Surveillance W(Z) Function versus Burnup Exclusion Axial Elevation 150 3000 10000 16000 Zone Point (feet) MWD/MTU MWD/MTITU MWD/MTU MWD/MTU 31 6.00 1.1480 1.1509 1.1871 1.2333 32 5.80 1.1371 1.1359 1.1713 1.2174 33 5.60 1.1310 1.1246 1.1565 1.2015 34 5.40 1.1295 1.1142 1.1458 1.1880 35 5.20 1.1363 1.1140 1.1434 1.1752 36 5.00 1.1436 1.1174 1.1421 1.1728 37 4.80 1.1495 - 1.1224 1.1389 1.1726 38 4.60 1.1551 1.1265 1.1364 1.1704 39 4.40 1.1601 1.1302 1.1363 1.1677 40 4.20 1.1645 1.1334 1.1364 1.1642 41 4.00 1.1683 1.1361 1.1361 1.1594 42 3.80 1.1716 1.1385 1.1355 1.1555 43 3.60 1.1743 1.1404 1.1347 1.1547 44 3.40 1.1769 1.1417 1.1344 1.1559 45 3.20 1.1806 1.1465 1.1377 1.1571 46 3.00 1.1929 1.1589 1.1494 1.1592 47 2.80 1.2141 1.1779 1.1676 1.1671 48 2.60 1.2367 1.1989 1.1881 1.1833 49 2.40 1.2596 1.2228 1.2084 1.2002 50 2.20 1.2823 1.2471 1.2282 1.2168 51 2.00 1.3047 1.2706 1.2475 1.2332 52 1.80 1.3265 1.2935 1.2660 1.2491

  • 53 1.60 1.0000 1.0000 1.0000 1.0000
  • 54 1.40 1.0000 1.0000 1.0000 1.0000

= 55 1.20 1.0000 1.0000 1.0000 1.0000 56 1.00 1.0000 1.0000 1.0000 1.0000

= 57 0.80 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 Note: Top and Bottom 15% Excluded BEAVER VALLEY - UNIT I 4.1-10 COLR 18 Revision 51

C I

BVPS-1 LICENSING REQUIREMENTS MANUAL Table 4.1-2 FQ(Z) Penalty Factor versus Bumup Cycle Burnup FQ(Z)

(MT'D/MTU) Penalty Factor All Burnups 1.02 Note: The Penalty Factor, to be applied to FQ(Z) in accordance with Technical Specification Surveillance Requirement 4.2.2.3, is the maximum factor by which FQ(Z) is expected to increase over a 39 Effective Full Power Day (EFPD) interval (surveillance interval of 31 EFPD plus the maximum allowable extension not to exceed 25% of the surveillance interval per Technical Specification Surveillance Requirement 4.0.2) starting from the burnup at which the FQ(Z) was determined.

BEAVER VALLEY - UNIT 1 4.1-11 COLR 18 Revision 5:1