L-06-155, Core Operating Limits Report, Revision 13

Core Operating Limits Report, Revision 13

ML063120169
Person / Time
Site:	Beaver Valley
Issue date:	11/06/2006
From:	Lash J FirstEnergy Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
L-06-155
Download: ML063120169 (13)

Text

FENOC FirstEnergyNuclear OperatingCompany James H. Lash 724-682-5234 Site Vice President Fax: 724-643-8069 November 6, 2006 L-06-155 ATTN: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

Beaver Valley Power Station, Unit No. 2 Docket No. 50-412, License No. NPF-73 Core Operating Limits Report, Revision 13 FirstEnergy Nuclear Operating Company (FENOC) hereby submits a revision of the Core Operating Limits Report (COLR) for Beaver Valley Power Station (BVPS) Unit No. 2 as required by Section 6.9.5 of the BVPS Technical Specifications. Revision 13 of the COLR is enclosed.

Revision 13 of the COLR is associated with the implementation of License Amendments Nos. 155 (Relaxed Axial Offset Control) and 156 (Extended Power Uprate) and the reload for Cycle 13 with a 3% power uprate, effective October 20, 2006.

There are no regulatory commitments contained in this letter. 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

Enclosure:

Beaver Valley Power Station Unit No. 2, Core Operating Limits Report, Revision 13 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)

L-06-155 Enclosure Beaver Valley Power Station Unit No. 2 Core Operating Limits Report Revision 13

BVPS-2 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Specification 3.1.3.5 Shutdown Rod Insertion Limits The shutdown rods shall be withdrawn to at least 225 steps.0)

Specification 3.1.3.6 Control Rod Insertion Limits Control Banks A and B shall be withdrawn to at least 225 steps.0)

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 - Fo(Z) Limits The Heat Flux Hot Channel Factor - FQ(Z) limit is defined by:

FQ(Z) [<CFQ]*K(Z) for P> 0.5 FQ(Z) [CFQ]

• K(Z) forP*< 0.5 Where: CFQ = 2.40 P= THERMAL POWER RATED THERMAL POWER K(Z) the function obtained from Figure 4.1-3.

FQ (Z) = F (Z)* 1.0815 F6 (Z) F6(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.

(1) As indicated by the group demand counter BEAVER VALLEY - UNIT 2 4.1-1 COLR 13 Revision 49

BVPS-2 LICENSING REQUIREMENTS MANUAL Specification 3.2.3 Nuclear Enthalpy Rise Hot Channel Factor - F NAH FNAH -< CFAH * (1 + PFAH (1-P))

Where: CFAH = 1.62 PFAH = 0.3 P= THERMAL POWER RATED THERMAL POWER BEAVER VALLEY - UNIT 2 4.1-2 COLR 13 Revision 49

BVPS-2 LICENSING REQUIREMENTS MANUAL 225 200 175 "i) 150 C) 0.

0~ 125 z

o i-C,)

0 100 10.

Z

<m r0 75 0

50 25 0

0 10 20 30 40 50 60 70 80 90 100 PERCENT OF RATED THERMAL POWER FIGURE 4.1-1 CONTROL ROD INSERTION LIMITS AS A FUNCTION OF RATED POWER LEVEL BEAVER VALLEY - UNIT 2 4.1-3 COLR 13 Revision 49

BVPS-2 LICENSING REQUIREMENTS MANUAL 120 110 100 90 80 70 60 50 40 30 20 10 0

-60 -40 -20 0 20 40 60 Axial Flux Difference (Delta I)%

FIGURE 4.1-2 AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF PERCENT OF RATED THERMAL POWER FOR RAOC BEAVER VALLEY - UNIT 2 4.1-4 COLR 13 Revision 49

BVPS-2 LICENSING REQUIREMENTS MANUAL 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 2 4 6 8 10 12 Core Height (feet)

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

BEAVER VALLEY - UNIT 2 4.1-5 COLR 13 Revision 49

BVPS-2 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 *1.239 Overtemperature AT reactor trip setpoint Tavg coefficient K2 > 0.0183/ 0 F Overtemperature AT reactor trip setpoint pressure coefficient K3 > 0.001/psia Tavg at RATED THERMAL POWER T'<* 580.0°F(')

Nominal Pressurizer Pressure P'> 2250 psia Measured reactor vessel AT lead/lag time constants til = 0 sec*

(* The response time is toggled off to meet the analysis value of zero.) -12 = 0 sec*

Measured reactor vessel AT lag time constant Tc3

• 6 secs Measured reactor vessel average temperature lead/lag time constants T4 - 30 secs T5 < 4 secs Measured reactor vessel average temperature lag time constant T6 < 2 secs f (AI) 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 2 4.1-6 COLR 13 Revision 49

BVPS-2 LICENSING REQUIREMENTS MANUAL Overpower AT Setpoint Parameter Values:

Parameter Value Overpower AT reactor trip setpoint K4*< 1.094 Overpower AT reactor trip setpoint Tavg rate/lag coefficient K5 > 0.02/°F for increasing average temperature K5 = 0/'F for decreasing average temperature Overpower AT reactor trip setpoint Tavg heatup coefficient K6 > 0.0021/°F for T > T" K6 = 0/'F for T _<T" Tavg at RATED THERMAL POWER T" < 580.0°F(')

Measured reactor vessel AT lead/lag time constants "C,= 0 sec*

(* The response time is toggled off to meet the analysis value of zero.) T2 = 0 sec*

Measured reactor vessel AT lag time constant T3 *--6 secs Measured reactor vessel average temperature lag time constant T6 < 2 secs Measured reactor vessel average temperature rate/lag time constant T7 Ž- 10 secs Specification 3.2.5 DNB Parameters Parameter Indicated Value Reactor Coolant System Tavg Tavg _< 583.6-F(2)

Pressurizer Pressure Pressure Ž 2214 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 OF).

(2) The Reactor Coolant System (RCS) Tavg value includes allowances for rod control operation and verification via control board indication.

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

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

BEAVER VALLEY - UNIT 2 4.1-7 COLR 13 Revision 49

BVPS-2 LICENSING REQUIREMENTS MANUAL 670 660 650 640 630 H620 610 600 590 580 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 2 4.1-8 COLR 13 Revision 49

BVPS-2 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/MTU

• 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 1.2425 1.3243 1.2957 1.2379 9 10.40 1.2294 1.3089 1.2830 1.2268 10 10.20 1.2157 1.2912 1.2681 1.2233 11 10.00 1.2036 1.2737 1.2535 1.2178 12 9.80 1.1934 1.2603 1.2420 1.2115 13 9.60 1.1827 1.2557 1.2312 1.2033 14 9.40 1.1730 1.2534 1.2205 1.1992 15 9.20 1.1706 1.2464 1.2083 1.1985 16 9.00 1.1782 1.2374 1.1962 1.2000 17 8.80 1.1847 1.2348 1.1974 1.2021 18 8.60 1.1913 1.2342 1.2073 1.2098 19 8.40 1.1978 1.2317 1.2176 1.2209 20 8.20 1.2017 1.2267 1.2245 1.2300 21 8.00 1.2037 1.2194 1.2290 1.2364 22 7.80 1.2039 1.2152 1.2311 1.2402 23 7.60 1.2020 1.2110 1.2307 1.2416 24 7.40 1.1986 1.2045 1.2280 1.2405 25 7.20 1.1946 1.1972 1.2231 1.2372 26 7.00 1.1908 1.1905 1.2162 1.2316 27 6.80 1.1856 1.1825 1.2074 1.2240 28 6.60 1.1787 1.1728 1.1968 1.2147 29 6.40 1.1704 1.1619 1.1847 1.2033 30 6.20 1.1607 1.1498 1.1712 1.1903 31 6.00 1.1499 1.1362 1.1564 1.1805 32 5.80 1.1380 1.1237 1.1408 1.1712 Note: Top and Bottom 10% Excluded BEAVER VALLEY - UNIT 2 4.1-9 COLR 13 Revision 49

BVPS-2 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/MTU MWD/MTU MWD/MTU 33 5.60 1.1301 1.1129 1.1274 1.1618 34 5.40 1.1282 1.1062 1.1201 1.1561 35 5.20 1.1340 1.1099 1.1188 1.1565 36 5.00 1.1402 1.1145 1.1198 1.1563 37 4.80 1.1451 1.1176 1.1218 1.1561 38 4.60 1.1497 1.1206 1.1229 1.1575 39 4.40 1.1538 1.1232 1.1237 1.1584 40 4.20 1.1568 1.1260 1.1242 1.1584 41 4.00 1.1625 1.1303 1.1241 1.1576 42 3.80 1.1715 1.1353 1.1252 1.1559 43 3.60 1.1816 1.1395 1.1310 1.1539 44 3.40 1.1910 1.1435 1.1360 1.1516 45 3.20 1.1988 1.1471 1.1387 1.1483 46 3.00 1.2112 1.1579 1.1485 1.1511 47 2.80 1.2315 1.1786 1.1675 1.1675 48 2.60 1.2560 1.2033 1.1874 1.1862 49 2.40 1.2801 1.2281 1.2074 1.2047 50 2.20 1.3037 1.2527 1.2271 1.2229 51 2.00 1.3268 1.2769 1.2462 1.2406 52 1.80 1.3488 1.3001 1.2647 1.2576 53 1.60 1.3694 1.3220 1.2819 1.2736 54 1.40 1.3878 1.3418 1.2975 1.2883

• 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 10% Excluded BEAVER VALLEY - UNIT 2 4.1-10 COLR 13 Revision 49

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

MWD/MTU Penalty Factor 0 to 4300 1.02 4300 to 5000 1.0205 5000 to EOL 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 2 4.1-11 COLR 13 Revision 49