View source for L-19-011, Plant, Unit 1 - Revision 1 of the Cycle 16 Core Operating Limits Report (COLR)

{{Adams
| number = ML19029B238
| issue date = 01/29/2019
| title = Plant, Unit 1 - Revision 1 of the Cycle 16 Core Operating Limits Report (COLR)
| author name = Simmons P
| author affiliation = Tennessee Valley Authority
| addressee name = 
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = 05000390
| license number = NPF-090
| contact person = 
| case reference number = WBL-19-011
| document type = Fuel Cycle Reload Report, Letter type:L
| page count = 12
}}

=Text=
{{#Wiki_filter:Tennessee Valley A wBL-19-011 January 29,2019 10 cFR 50.4 ATTN: Document Control Desk
: u. s. Nuclear Regulatory commission Washington, D.C. 20555-0001 Watts Bar Nuclear plant, Unit 1 Facility Operating License No. NpF-90 NRC Docket No. 50-390

==Subject:==
UNIT 1 REVISION 1 OF THE CYCLE           CORE OPERATING LIiIITS REPORT (coLR)                                '6 Pursuant to Watts Bar Nuclear Plant Technical Specifications (Tech Spec) Section 5.g.s.d, Tennessee Valley Authority (TVA) has encloseo irevision revision updates the W(z) values on Table A.1.
i otine unit'i6v"re io cotR. rni.
There are no regulatory commitments contained in this letter or the enclosure. should you have questions regarding this submittal, please contact Kim Hulvey at (4Zg) 365-7T20.
Paul Simmons Site Vice President Watts Bar Nuclear plant

U.S. Regulatory Commission Page2 January 29,2019

==Enclosure:==
Watts Bar Nuclear Plant, Unit 't, Cycle 16 Core Operating Limits Report, Revision 1, January 2019 cc (Enclosure):
NRC Regional Administrator - Region Il NRR Project Manager NRC Senior Resident lnspector

ENCLOSURE     1 Watts Bar Nuclear Plant, Unit 1, Cycle 16 Gore Operating Limits Report Revision I January 2019

QA Record 136 1901 18 802 IVATTS BAR NUCLEAR PLANT, UNIT 1, CYCLE 16 CORE OPERATING LIMITS REPORT Revision    1 January 2019 Prepared by:
Fuel Engineering Verified by:
J. f/Ritchi{PVUR Fuel Engineering l   ,1re  Irt Date Reviewed by:
Setter,     WR Fuel Engineering Manager r r.fl 8/tt Date
                                              ,//1'T-(
B.T. Mack, Reacto fnginee               Manager                                          Date Approved by:
                                                                                   '/ou/,r r, PORC Chairman                                                        Date d*rt
                                                                                           ,/1 ll, Plant Manager                                                      D ate Date of PORC    Affected Revision             Approval        Pages        Reason for Revision 0              4il27l2018         Ail        lnitial lssue 1              See Above          1.9        Revised W(=) values due to DAO > 3%
L,lnit I                                                                                         C1'clc lfi W.,\T]'S tsAR                                    []agc I ol'  I                                ltevision  I

1.0    CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for Watts Bar Unit 1 Cycle 16 has been prepared in accordance with the requirements of the Technical Specifications (TS) 5.9.5.
The Technical Specifications affected by this report are listed below:
3.1.4 Moderator Temperature Coefficient (MTC) 3.1.5 Rod Group Alignment Limits 3.1.6 Shutdown Bank Insertion Limits 3.L.7 Control Bank Insertion Limits 3.2.1 Heat Flux Hot Channel Factor (Fq(Z))
3.2.2 Nuclear Enthalpy Rise Hot Charurel Factor (Fo"*)
3.2.3 Axial Flux Difference (AFD) 3.9.1 BoronConcentration 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 the NRC approved methodologies specified in the Technical Specifications Section 5.9.5.
The following abbreviations are used in this section:
BOL              Beginning of Cycle Life ARO              AllRods Out ITZP             HotZero Thermal Power EOL              End of Cycle Life RTP              Rated Thermal Power 2.1    MODERATOR TEMPERATURE COEFFICIENT - MTC (LCO 3.1.4) 2.1.1 The MTC limits are:
The ARO/HZP - MTC shall be less positive than or equal to 0 Ak/l/oF (upper limit).
With the measured BOLIAROIHZP - MTC more positive than -3.277 x l0-5 Al/ld"F (as-measured MTC limit), establish control rod withdrawal limits to ensure the MTC remains less positive than or equal to 0 Ak/ld"F (upper limit) for all times in core life.
The EOL/ARO/RTP - MTC shall be less negative than or equal to
                   -4.5 x l0a Aldl/oF (lower limi0.
2.1.2 The 300 ppm surveillance limit is:
The measured 300 ppm /AROiRTP-MTC should be less negative than or equal to
                    -3.75 x l0-4 Ak/ldoF.
2.1.3 The 60 ppm surveillance limit is:
The measured 60 ppm /ARO/RTP-MTC should be less negative than or equal to 4.28 x l0-4 Ak/k/oF.
Unit I                                                                                      Cycle 16 WATTS    BAR                               Page2 of  9                                    Revision I

2.2    SHUTDOWN MARGTN             - SDM (LCO 3.1.5,3.1.6,    3.1.7) 2.2.1 For TS 3.1.5, SDM shall be Z l.6a Ak/k in MODE I and MODE 2.
2.2.2   For TS 3.1.6, SDM shall be> l.60/o  Lklk in MODE I and MODE 2.
2.2.3 For TS 3.1.7, SDM shall be> 1.6%o LWk inMODE I andMODE 2 withkeff> 1.0.
2.3    SHUTDOWN BANK TNSERTION LIMITS (LCO 3.1.6) 2.3.1 The shutdown banks shall be withdrawn to     a position greater than or equal to 225 steps withdrawn.
2.4    CONTROL BAI{K INSERTION LIMITS (LCO 3.1.7) 2.4.1 The control banks are fully withdrawn or shall be limited in physical insertion   as shown in Figure  l.
2.4.2 Each control bank shall be considered fully withdrawn from the core at greater than or equal to 225 steps.
2.4.3 The control banks shall be operated in sequence by withdrawal of Bank A, Bank B, Bank C, and Bank D. The control banks shall be sequenced in reverse order upon insertion.
2.4.4 Each control bank not fully withdrawn from the core shall be operated with the following overlap as a function of park position.
Park Position  (steps)           Bank Overlap   (steps)            Bank Difference (steps) 225                               109                               116 226                                 r0                              116 227                                 11                              116 228                                 t2                              116 229                                 13                              116 na                                  t4                              l l6 231                               r l5                              116 2.5    HEAT FLUX HOT CHANNEL FACTOR -Bq(Z) (LCO 3.2.1)
Fo(Z)< [CFQ/P]     *K(Z)        forP>0.5 Fq(Z)< [CFQ/0.5]      *K(Z)     forP<0.5 Where P    - Thermal Power lRated Thermal Power 2.s.r cFQ - 2.s0 Unit I                                                                                    Cycle  16 WATTS BAR                                  Page 3 of 9                                  Revision  1

2.5.2 K(Z) is provided in Figure 2.
2-53 Faw(Z) = Fo'(Z)
* W(Z)1P for P > 0.5 Fq*(Z) : Fq'(Z)
* W(Z)/0.5 for P < 0.5 where: W(Z) values are provided in Table A.l. The table provides suflicient information to determine W(Z) versus core height for all cycle burnups.
2.5.4 Partpower W(Z) values are only required to be used when the part power surveillance is performed using the moveable incore detector system.
2.5.5 Faw(Z) Penalty Factor The Faw(Z) penalty factor is provided in Table A.2.
2.6    ttucLEAR ENTHALPY RrSE HOT CHANNEL FACTOR -                      FarrN (LCO 3.2.2)
Far* S F*"tt * ( I + PF * ( l-P))
where P  - Thermal Power lRated Thermal Power TT RTP FaH""    : I.65 for RF A-2 fuel, and PF : 0.3 2.7    AXrAL FLUX DIFFERENCE - AFD (LCO               3.2.3) 2.7.1 The AFD limits for Cycle 16 are provided in Figure  3.
2.8    REFUELING BORON CONCENTRATION (LCO 3.9.1) 2.8.1 The refueling boron concentration shall be > 2000 ppm.
3.0    NUMBER OF TPBARS IN REACTOR CORE (TS 4.2.1) 3.0.1 There are 1584 tritium producing burnable absorber rods (TPBARs) in the reactor core for Cycle 16.
Unit 1                                                                                Cycle  16 WATTS BAR                                 Page 4 of 9                                Revision 1

       ?ts E,
o
         -E 3
          .a 1so a.
lrJ g  F 3
F I
Lzs 6
o a.
A 1oo H
z-o c,
tts 0.0           0.2            0.4             0.5            0.8              1.0 FRACTION OF RATED THERMAT POWER Figure I Control Bank Insertion Limits Versus Thermal Power Four Loop Operation Note: Fully withdrawn region shall be the condition where shutdown and control banks are at a position within the interval of >225 and323l steps withdrawn.
Unit 1                                                                                Cycle   16 WATTS BAR                                  Page 5 of 9                              Revision   1

1.2 1.1 1.0                                          L E-_
0.9 0.8 l-o o
         =
(L    o.7 o
LL 0.6                                           I core  Heioht     KU\
oo
        .N G
E    0.5 l-zo o.4 0.3 o.2 0.1 0
o         2          468                                 10         12 Core Height (feet)
Figure  2 K(z) - Normalized Fq(z)  as a Function of Core    Height Unit 1                                                                             Cycle 16 WATTS BAR                             Page 6 of 9                                Revision I

120 110 100 90 80 o
8ro
       =
6 E
o f60 E'
o r}a (r
fso o
s 40
                                  -20      -10       0       10 Flux Difference (Ll) Yo f igure 3 Axial Flux Difference Acceptable Operation Limits as a function of Rated Thermal Power (RAOC)
Unit I                                                                           Cycle 16 WATTS BAR                             Page 7 of 9                             Revision  1

trrr Table A.1 RAOC W(Z) Surveillance Factors Max W(z) Max W(z)     Max W(z)    Max W(z)   Max W(z)   Max W(z)   Max W(z) at 150  at 3000      at 60fi)     at 80fi)  at 12fi)0  at 16fi)0  at 18000 Height (ft)  MWD'MTU  MWD/MTU     MWD/MTU      MWD'MTU    MWD/MTU    MWD'MTU    MWD/MTU (100%    (100%        (100%        (100%      (100%     (100%       (100%
Powerl   Powerl       Powerl        Powerl    Powerl                Powerl 12.0742     1.0000   1.0000       1.0000       1.0000     1.0000    1.0000     1.0000 11.8730     1.0000   1.0000       1.0000       1.0000     1.0000    1.0000     1.0000 11.6717     1.0000   1.0000       1.0000       1.0000     1.0000    1.0000     1.0000 1',!.4705   1.0000   1.0000       1.0000       1.0000     1.0000    1.0000     1,0000 11.2693     1.0000   1.0000       1.0000       1.0000     1.0000    1.0000     1.0000 11.0680     1.0000   1.0000       1.0000       1.0000     1.0000    1.0000     1.0000 10.8668     1.1622   1.2701       1.2488       1.2143     1.14/,9   1.1530     1.1705 10.6655     1.1598   1.2670       1.2453       1.2113     1.1438    1.1510     1,1679 10.4643     1.1549   1.2612       1.2391       1.2057     1.1403    1.1465     1.1638 10.2631     1.1491   1.2538       1.2312       1.1983     1.1355    1.1405     1.1580 10.0618     1.1438   1.2445       1.2216       1.1900     1.1288    1.1326     1.1514 9.8606     1.1390   1.2.36.2     1.2128       1.1799     1125s     1.1273     1.1435 9.6594      1.1364   1.2301       1.2052       1.1715     1.1253    1.1270     1.1363 9.4581      1.1377   1.2223       1.1978       1.1702     1.1247    1.1264     1.1338 9.2569      1j370    1.2123       1.1997       1.1714    1.1266     1.1236     1.1%7 9.0557      1.1388  1.2042        1.2014       1.1723    1.1273     1.1248     1.1434 8.8544     1.1465   1.1996        1:1978       1.1713    1.1281     1.1304     1.1486 8.6532     1.1579   1.1959        1.1948       1.1712    1.1341     1.1402     1.1558 8.4519     1.1687   1.1914        1.1970       1.1766    1.',1443   1.1571     1.1736 8.2507      1.1769  1.1906        1.1973       1.1798    1.1525     11720      1.1892 8.0495     1.1828   1.1908       1.1953        1.1807    1.1587     1.1843     1.2020 7.8482     1.1866   1.1906        1.1918       1.1802    1.1633     1.1950     1.2131 7.6470     1.1881   1.1887        1jffi7       1.1779    1.1663     1.2034     '1.2218 7.4458     1.1878   1.1853       1.1800        1.1741    1.1675     1.2096     1.2282 7.2445     1.1888   1.1806       1.1719        1.1688    1,1666     1.2137     1.2322 7.0433     1.1904   1.1737       1.1628        1.1617    1.1679     1.2157     1.23/,0 6.8420     1.1909   1.1681       1.1573        1.1585    1.1701     1.2156     1.2335 6.6408     1.1898   1.1648       1.1559        1.1587    1.1701     1.2135     1.2309 6.4396     1.1876   1.1599       1.1526        1.1579    1.1692     1.2102     1.2266 6.2383     1.1835   1.1  553     1.1475        1.1557    1.1669     1.2050     1.2205 6.0371     1.1799   1.1515       1.1439       1.1523     1.1626     1.1978     1.2123 5.8359     1.1771   '1.1472      1.1410       1.1471     1.1584     1.1889     1.2022 5.6346     1.1738   1.1418       1.1373       11420      1.1559     1.1782     1.1903 5.4334     1.1700   1.1378       1.1 355      1.1404     '1.1540    1.1684     1.1782 5.2322     1.1680   1.1363       1.1357       1.1427     1.1537     1.1683     1.1716 5.0309     1.1690   1.1346       1.1357       1.',1454   1.1535     1.1698     1.1708 4.8297     1  1711  1.1318       't.1346      1.1469     1.1542     1.1711     1.1717 4.6284     1.1717   1.1286       1.1330       1.1479    1.1582      1.1715     1.1709 4.4272     1.1719   1.1249       1.1309       1.1482    1.1625     1.1710      1.1694 4.2260     1.173/'  1.1206       1.1282       1.1480    1.1664     1.1715     1.1672 4.4247     1.1749   1.1162       1.1252       1.1475    11700      1.1732     1.16/10 3.8235     1.1755   1.1111       1.1219       1.1463    1.1734     1.1743     1.1623 3.6223     1.1761   1.1069       1.12'.11     1.1454    1.1766     1.1762     1.1629 3.4210     1.1788   1.1065       1.1259       1.1472    1.1797     1.1829     1.1684 3.2198     1.1886   1.1090       1.1301      1.1518     1.1853     1.1912     1.1734 3.0186     1.1996   1.1 108      1.1351      1.1600     1.1938     1.1978     1.1791 2.8173     1.2095   1.1172       1_1444      11751      1.2093     1.2110     1.1926 2.6161     1.2210   1.1323      1.1588       1.1962     1.2320     1.2337     1.2138 2.4148     1.2356   1.1497      1.1761       1.2166     1.2534     1.2il6     1.2336 2.2136     1.2493   1.1671      1.1944       1.2365     1.2742     1.2747     1.2527 2.0124     1.2620   1.1839      1.2124       1.2559     1.2942     1.2940     1.2711 1.8111     1.2737   1.2001      1.2294        '1.2742   1.3131     1.3121     1.2884 1.6099     1.2842   1.2151      1.2452       1.2910     1.3304     1.3286     1.3M3 1.4087     1.2939   1.2279      1.2587       1.3053     1.3450     '1.3425    1.3177 1.2074     1.3025   1.2372      1.2684       1.3157     1.3554     1.3520     1.3268 1.0062     1.0000   1.0000      1.0000       1.0000     1.0000     1.0000     1.0000 0.8049     1.0000   1.OOO0      1.0000       1.0000     1.0000     1.0000     1.0000 0.6037     1.0000   1.0000      1.0000       1.0000     1.0000     1.0000     1.0000 o.4025     1.0000   1.0000      1.0000       1.0000     1.0000     1.0000     1.0000 0.2012     1.0000   1.0000      1.0000       1.0000     1.0000     1.0000     1.0000 0.0000     1.0000   1.0000      1.0000       '1.0000    1.0000     1.0000     1.0000 Unit I                                                                                            Cycle  16 WATTS BAR                               Page 8 of 9                                              Revision 1

trll Table 4.2 Fq*(Z) Penalty Factor Fo*(z)
Core Burnup Penalty (MWD/MTU)
Factor A11 Burnups           1.0200 Note:
: l. The Penalty Factor, which is applied to Faw(Z) for compliance with Surveillance Requirement 3.2.1.2, is the maximum factor by which Fq*(Z) is expected to increase per 3l Effective Full Power Days (EFPD) starting from the burnup at which the fow1Zl was determined.
Unit 1                                                                                Cycle 16 WATTS BAR                                Page 9 of 9                                Revision 1}}