ML20211B735

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Cycle 7 Colr
ML20211B735
Person / Time
Site: Millstone Dominion icon.png
Issue date: 05/31/1999
From: Johansen B, Skutch J, Sung Y
WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:
Shared Package
ML20211B726 List:
References
CAC-99-188, NUDOCS 9908250071
Download: ML20211B735 (15)
v • d • e


Text

.  :

i MILLSTONE UNIT 3 CYCLE 7 CORE OPERATING LIMITS REPORT May 1999 Edited by:

J. Skutch Y. Sung F

Approved:

B. J. JMen, Manager Core Analysis C Commercial Nuclear Fuel Division Westinghouse Electric Company LLC W==

Commercial Nuclear Fuel Dhh P. O. Box 355 CAC-99-188 Pittsburgh,Penns}lvania 15230 9908250071 990807 PDR ADOCK 05000423 p PDR.

AE w MimI UNrr 3. CYCLE 7 MAY 1999 Table of Content Sectkum Title Page 1.0 Core Oper ating thnits Report ..... ..... ...................... ..... ............ ........ .. .. . .... 1 2.0 Operating Lhnits . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I 11 Moderator Temperatum Coemcient (SpecificaGon 3/4.1.1.3) ................. 1 2.2 Shmtdown Rod Insertion Lhnit (Specification 3 /4.1.3.5) . .. .. .. . . ... . .. . . . . . .. .. . 2

'23 Comtrol Rod Insertion Limits (Specification 3/4.1.3.6) ... .. .. . . .. .. .. . . . . . . .. . . . . 2 4 2.4 Ax:ial Flux DifTenace (Four . Loop Operation)

(Specification 3/4.2.1.1)................................................................2 25 Section Deleted . .. .. .. .. .. .... . . .. . ... .. .. . .. . . . . .... . . ... . . . .... .. . . . . . . . . . . . .. . . . . .. .. . . 2 2.6 Heat Flux Hot Channel Factor (Four . Loop Operation) . Fn(Z)

(Specification 3/4.2.2.1)................................................................3 l

27 Heat Flux Hot Channel Factor Surveillance (Four . Loop Operation) 1 l Fo(Z) (Specification 3 /4.2.2.1.2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . 4 1

2.8 Section Deleted . . . . . . . .. .. . . . . . . . . .. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 I 19 Section Deleted . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1 10 Nmelear Enthalpy Rise Hot Channel Factor (Four . Loop Operation)

F% (Specification 3/4.2.3.1)...........................................................4 2.11 Section Deleted . .. . .. . .. . . . . . .. . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . .. 4 i 1 12 Shmtdown Margin Monitor Alann Setpoint (Specification 3/4.3.5)........... 5 l

Rev. Mar 1.1999 8:53 AM i

) y- 1 MILLSTONE UNrf 3 - CYCLE 7 MAY 1999 List of Figures 4 Figure Title Page 1 Control Rod Bank Insertion Limits versus Thermal Power for Four Loop Operat ion .. . . . .. .. . . .. . . .. .. . . . . .. . . . . . . . . . . . . . .. . . . . . . .. . . . . .. . ... . . . . . .. . . . . . . . . . . . . . 6 2 Axial linx Difference Lhnits as a Function of Rated Thermal Power for Four Loop Operation . . . . . . . .. . . . . .. . ... ... ... . . .. . . . . . .. .. . ... .. .. .. .... .. .. .... .. . . . . . . . . . . . .. . . . 7 3 K(Z) - Normalized Fn(Z) as a Function of Core Height for Four Loop Operation . .. . . . .. . . . .. . . . ... .. .. .. .. .. .. . . . . . .. . ..... . . . . ... . . . . . . . . . . . . . . .. . . . . . . . . .. .. 8 List of Tables Table Title Page 1 Four Loop RAOC W(Z) Function Millstone Unit 3 - Cycle 7 .. . . . .. ..... . .. ... . ...... .. .. .. . .. .... . . .. .. ...... .. .. .. . . .. . . . .. .. . . . . . 9 2 Four Loop Base Load W(Z) Function Millstone Unit 3 - Cycle 7 ... . . .. ... ... .. .. .. . ... .. .. .... . .. . . . ........ . .. . . .... .. . . . . . . . . . . .. . 11 Rev. May 3,1999 8:53 AM ii

MILisrONE UNrr 3 - CYCLE 7 MAY 1999 Millstone Unit 3 Cycle 7 Core Operating Limits Report 1.0 Core Operating Limits Report This Core Operating Limits Report (COLR) for Millstone Unit No. 3 Cycle 7 has been prepared in accordance with the requirements of Technical Specification 6.9.1.6.a. The Technical Specifications affected by this report are listed below.

3,4.1.1.3 Moderator Temperature Coefficient 3,4.1.3.5 Shutdown Rod Insertion Limit 3,4.1.3.6 Control Rod Insertion Limits (Four Loop) 3/4.2.1.1 Axial Flux Difference - Four loop 3/4.2.2.1 Heat Flux Hot Channel Factor - Four Loop 3,4.2.3.1 Nuclear Enthalpy Rise Hot Channel Factor - Four loop 3,4.3.5 Shutdown Margin Monitor Alarm Serpoint .

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 :m Technical Specificetion 6.9.1.6.b. Limits for N-1 loop operation are not provided. Power operation :m N-1 loop conditions is not allowed for Cycle 7.

2.1 Moderator Temperature Coemcient (Specification 3/4.1.1.3) 2.1.1 The Moderator Temperature Coemeient (MTC) limits are as follows:

d

. The BOl>ARO/0% - 70% RTP MTC shall be less positive than + 0.5 x 10 Ak/k/ F.

l Above 70% RTP, the MTC limit is a linear ramp to 0 Ak/k/ F at 100% RTP.

. The EOL/ARO/RTP MTC shall be less negative than 5.65 x 104 Ak/k/*F.

Rev. May 3. :1999 8:53 AM l

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MILLSTONE UNIT 3 - CYCLE 7 MAY 1999

' 2.1.2 The MTC surveillance limit is as follows:

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

- 4.9 x 10d Ak/k/*F.

where: BOL stands for Beginning Of Cycle Life ARO stands for All Rods Out HZP stands for Hot Zero Power EOL stands for End Of Cycle Life RTP stands for Rated Thermal Power 2.2 Shutdown Rod Insertion Limit (Specification 3/4.1.3.5) e The shutdown rods shall be at least 222 steps withdrawn (inclusive).

2.3 Control Rod Insertion Limits (Specification 3/4.1.3.6)

I e The control rod banks shall be limited in physical insertion s shown in Figure I for four-loop operation.

2.4 Axial Flux Difference (Four - Loop Operation) (Specification 3/4.2.1.1) 2.4.1 The Axial Flux Difference (AFD) limits are provided in Figure 2.

2.4.2 The AFD target band during base load operation is i 5%.

2.4.3 The mimmum allowable (nuclear design) power level for base load operation (APL"") is 80% of Rated Thermal Power.

2.5 Section Deleted Rev. May 3.1999 8:53 AM 2

l I

M1ILLSTONE UNTT 3 - CYCLE 7 MAY 1999 1.6 - Heat Flux Hot Channel Factor (Four-Loop Operation) - F n(Z) (Specification 3/4.2.2.1)

Fo(Z) s F""n _

  • K(Z) for P > 0.5 P

Fn(Z) s F""n_

  • K(Z) for P s 0.5

0.5 where

P= Thermal Power Rated Thermal Power

2. 6. I F""n = 2.60.

I

2. 6.2 K(Z)is provided in Figure 3. j
2. 6.3* W(Z) values for 4-Loop RAOC operation are provided in Table 1. Note that the W(Z) values at Axial Mesh I are at the top of the core. The Cycle 7 burnup dependent RAOC W(Z) values are valid over the range of burnup from 0 to 22000 MWD /MTU.
2. 6.4* W(Z) values for 4-Loop Base Load (BL) operation are provided in Table 2. Note that the W(Z) values at Axial Mesh I are at the top of the core. The Cycle 7 burnup dependent BL W(Z) values are valid over the range of burnup from 0 to 22000 MWD /MTU.
2. 6.5 A 2% factor shall be used for surveillance requirements 4.2.2.1.2 and 4:2.2.1.4 .

i

  • Sections 2.6.3 and 2.6.4 are prepared by NU.

I I 1 Itam. May 3.1999 8:53 AM 3

Y MIL 1 STONE UNIT 3 - CYCLE 7 MAY 1999 2.7 Heat Flux Hot Channel Factor Surveillance (Four-Loop Operation) - Fo(Z)

(Specification 3/4.2.2.1.2)

F"q(Z) s F""g ___

  • K(Z) for P > 0.5 P
  • W(Z)

F"q(Z) s ____F""g_

  • K(Z) for P s 0.5 0.5
  • W(Z) where: P= Thermal Power Rated Thermal Power 2.8 Section Deleted 2.9 Section Ikleted 2.10 Nuclear Enthalpy Rise Hot Channel Factor (Four-Loop Operation) - F%

(Specification 3/4.2.3.1)

F"au s F""An * (1 + PFan * [l - P])

where: P= Thermal Power Rated Thermal Power 2.10.1 F""An = 1.54 for VANTAGE SH fuel assembly F""An = 1.58 for Robust Fuel Assembly (RFA).

2.10.2 PFan = 0.3.

2.11 Section Deleted En. May 3.1999 8:53 AM 4

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MILLSTONE UNIT 3 - CYCLE 7 MAY 1999 2.12 Shutdown Margin Monitor Alarm Setpoint (Specification 3/4.3.5)+  !

I The Shutdown Margin Monitor (SMM) minimum count rate and Alarm Ratio Setting to meet LIMITING COINDITION FOR OPERATION (LCO) 3.3.5 shall be as shown below.

Tech. Spec. ILO SMM Alarm Ratio Setting Min. Count Rate (counts /sec) 3.3.5.a 1.50 1.0 1.25 0.6 3.3.5.b.1 1.50 0.50  ;

1.25 0.35 3.3.5.b.2 1.50 0.35 1.25 0.25 The combination of the SMM Alarm Ratio setting and minimum count rate accounts for the time lag between the indicated and actual count rates, as well as other uncertainties. h'I'e specified SMM Alarm Rauio setting ensures that the assumption that an alarm is generated at flux doubling in the Boron Dilution Eve:nt analysis remains valid. The count rate is displayed on the SMM.

I I

l Section 2.12 was prepared by NU based on boron dilution analyses performed by Westinghouse.

Rew. May 3.1999 8:53 AM 5

AE @

MIM. STONE UNir 3 - CYCLE 7 MAY 1999 Figure 1 Control Rod Bank Insertion Lhnits versus Thennal Power for Four Loop Operation 225

/ /o. m .222 200

/

175 j BANK B p

/

g ~~ /

  1. 1.0,164

$ 150 s /

5 E

g 125 f p,/

.i '

BANK C .

u

$ 100 f t

8 l 3 75 i

5 / BANK D 1

/

/

50 c 1 nm so 1 l 25 0.28,0 I

0 0.0(I 0.20 0.40 0.60 0.80 1.00 Fraction of Rated Thermal Power Rev. May 3,1999 821> AM 6

I 1

'A MILLSTONE UNrr 3 - CYCLE 7 MAY 1999 Figure 2 Axial Flux Difference Lhnits as a Function of ,

Rated Thennal Power for Four Loop Operation 120 .

i 1

-14,100 9,100 100 ,

UNACCEPTABLE UNACCEPTABLE )

OPERATION OPERATION

  • A y 80 3:

O ACCEPTABLE 1 OPERATION ( )

m \

60 g

F-

-32,50 f 27,50 o

3m 40

" l 20 1

0

-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 Flux Difference % Delta-1 Rev. May 3,1999 8:53 AM 7

w ill MILL 5 TONE llN'~ 3 - CYCLE 7 MAY 1999 Figure 3 K(Z) - Normalized Fn(Z) as a Function of Core IIeight for Four Loop Operation 1.2 I l

i 1.1 l

l 1.0 -

l 0.9 i

~

l

@ 0.8 E I B l ts 0.7 9

. 0.6 0.5 7

Mm o

0.4 z

K(Z) Elevation 1.0 0.0 Ft i 1.0 6.0 Ft l 0.925 12.0 Ft 0.1 0.0 E 1 2 3 4 5 6 7 8 9 10 1 ', 12 Core Elevation,(feet) l Rev. May 3,1999- E- AM 8

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MILLSTONE UNrr 3 - CYCLE 7 MAY 1999 Table 1

Four Loop RAOC W(Z) Function Millstone Unit 3 - Cycle 7 i

Bumup Bumup Bumup Bumup Mesh Axial Height

  • MWD /MTU MWD /MTU MWD /MTU MWD /MTU No. (feet) 150 4000 10000 18000 1 12.00 1.0000 1.0000 1.0000 1.0000 2 11.83 1.0000 1.0000 1.0000 1.0000 3 11.67 1.0000 1.0000 1.0000 1.0000 4 11.50 1.0000 1.0000 1.0000 1.0000 5 11.33 1.0000 1.0000 1.0000 1.0000 6 11.17 1.0000 1.0000 1.0000 1.0000 7 11.00 1.0000 1.0000 1.0000 1.0000 8 10.83 1.0000 1.0000 1.0000 1.0000 9 10.67 1.0000 1.0000 1.0000 1.0000 10 10.50 1.0000 1.0000 1.0000 1.0000 11 10.33 1.0000 1.0000 1.0000 1.0000 12 10.17 1.2468 1.3097 1.3437 1.3214 13 10.00 1.2366 1.2960 1.3269 1.3076 14 9.83 12280 1.2819 1.3091 12938 15 9.67 1.2172 1.2682 1.2890 1.2807 16 9.50 12053 12564 1.2668 1.2660 17 9.33 1.1915 1.2440 12496 12530 18 9.17 1.1758 1.2300 1.2394 12456 19 9.00 1.1610 1.2167 12280 1.2443 20 8.83 1.1505 1.2054 1.2185 1.2427 21 8.67 1.1457 1.1959 1.2134 12374 22 8.50 1.1440 1.1874 1.2079 12335 23 8.33 1.1425 1.1797 12004 12296 24 8.17 1.1400 1.1731 1.1921 1.2248 25 8.00 1.1370 1.1670 1.1861 1.2227 26 7.83 1.1335 1.1605 1.1807 12207 27 7.67 1.1294 1.1533 1.1747 1.2176 l j 28 7.50 1.1249 1.1634 1.1709 1.2174 i 29 7.33 1.1199 1.1562 1.1676 1.2175 30 7.17 1.1147 1.1485 1.1626 1.2150 31 7.00 1.1109 1.1395 1.1564 1.2110 32 6.83 1.1091 1.1313 1.1491 1.2055 33 6.67 1.1086 1.1258 1.1407 1.1985 34 6.50 1.1470 1.1232 1.1317 1.1902 35 6.33 1.1469 1.1807 l 1.1219 1.1208 36 6.17 1.1469 1.1204 1.1099 1.1699 37 6.00 1.1461 1.1192 1.1056 1.1573 7-38 5.83 1.1465 1.1189 1.1043 1.1461 l

Rev. May 3,1999 8:53 AM 1

L

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~

ill w MILLsTcNE UNIT 3 - CYCLE 7 MAY 1999 39 5.67 1.1506 1.1197 1.1027 1.1404 40 5.50 1.1584 1.1216 1.1043 1.1425 41 5.33 1.1673 1.1251 1.1"/33 1.1473 42 5.17 1.1749 1.1303 1.1121 1.1500 43 5.00 1.1823 1.1353 1.1155 1.1520 44 4.83 1.1892 1.1397 1.1185 1.1534 45 4.67 1.1956 1.1439 1.1212 1.1540 46 4.50 1.2016 1.1477 1.1236 1.1546 47 4.33 1.2072 1.1512 1.1257 1.1553 48 4.17 1.2124 1.1544 1.1275 1.1557 49 4.00 12175 1.1575 1.1294 1.1557 50 3.83 1.2226 1.1598 1.1331 1.1552 51 3.67 1.2277 1.1626 1.1394 1.1545 52 3.50 1.2328 1.1702 1.1455 1.1542 53 3.33 1.2370 1.1800 1.1512 1.1542 54 3.17 1.2420 1.1889 1.1568 1.1550 55 3.00 1.2526 1.1972 1.1615 1.1554 56 2.83 1.2658 1.2066 1.1694 1.1570 57 2.67 1.2785 1.2188 1.1827 1.1652 58 2.50 1.2941 1.2340 1.1961 1.1769 59 2.33 1.3119 1.2506 1.2088 1.1899 60 2.17 1.3304 1.2665 1.2215 1.2028 61 2.00 1.3488 1.2822 1.2338 1.2155 I 62 1.83 1.3667 1.2973 1.2455 ~1.2276 63 1.67 1.0000 1.0000 1.0000 1.0000 64 1.50 1.0000 1.0000 1.0000 1.0000 65 1.33 1.0000 1.0000 1.0000 1.0000 66 1.17 1.0000 1.0000 1.0000 1.0000 67 1.00 1.0000 1.0000 1.0000 1.0000 68 0.83 1.0000 1.0000 1.0000 1.0000 69 0.67 1.0000 1.0000 1.0000 1.0000 70 0.50 1.0000 1.0000 1.0000 1.0000 71 0.33 1.0000 1.0000 1.0000 1.0000 72 0.17 1.0000 1.0000 1.0000 1.0000 73 0.00 1.0000 1.0000 1.0000 1.0000

  • Distance from the bottom of active core (feet)

Rev. May L. 2999 853 AM ,

10 1

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MILLSTONE UNrr 3 - CYCLE 7 MAY 1999 1

Table 2 Four Imp Base Load W(Z) Function Millstone Unit 3 - Cycle 7 Bumup Bumup Bumup Bumup i Mesh Axial Height

  • MWD /MTU MWD /MTU MWD /MTU MWD /MTU No (feet) 150 4000 10000 18000 1 12.00 1.0000 1.0000 1.0000 1.0000 2 11.83 1.0000 1.0000 1.0000 1.0000 3 11.67 1.0000 1.0000 1.0000 1.0000 4 11.50 1.0000 1.0000 1.0000 1.0000 5 11.33 1.0000 1.0000 1.0000 1.0000 6 11.17 1.0000 1.0000 1.0000 1.0000 7 11.00 1.0000 1.0000 1.0000 1.0000 8 10.83 1.0000 1.0000 1.0000 1.0000 9 10.67 1.0000 1.0000 1.0000 1.0000 10 10.50 1.0000 1.0000 1.0000 1.0000 11 10.33 1.0000 1.0000 1.0000 1.0000 12 10.17 1.2469 1.2256 1.1777 1.1614 13 10.00 1.2365 1.2141 1.1757 1.1651 l 1.1665 14 9.83 1.2280 1.2024 1.1740 15 9.67 1.2172 1.1911 1.1720 1.1643 16 9.50 1.2053 1.1813 1.1706 1.1618 17 0.33 1.1915 1.1710 1.1662 1.1573 i 18 9.17 1.1758 1.1592 1.1584 1.1520 10 9.00 1.1611 1.1494 1.1528 1.1541 20 8.83 1.1503 1.1431 1.1499 1.1569 l' 8.67 1.1442 1.1398 1.1479 1.1569 21 22 8.50 1.1402 1.1370 1.1459 1.1572 23 8.33 1.1358 1.1330 1.1424 1.1568 24 8.17 1.1307 1.1281 1.1379 1.1554 25 8.00 1.1268 1.1247 1.1359 1.1567 26 7.83 1.1238 1.1227 1.1343 1.1583 27 7.67 1.1211 1.1213 1.1319 1.1591 28 7.50 1.1192 1.1370 1.1324 1.1628 29 7.33 1.1172 1.1357 1.1335 1.1670 l 30 7.17 1.1145 1.1337 1.1327 1.1688 l 31 7.00 1.1112 1.1307 1.1308 1.1693 l 32 6.83 1.1090 1.1278 1.1279 1.1686 l 33 6.67 1.1086 1.1254 1.1241 1.1666 l

34 6.50 1.1471 1.1235 1.1195 1.1634 35 6.33 1.1468 1.1219 1.1133 1.1590 36 6.17 1.1469 1.1204 1.1067 1.1535 37 6.00 1.1464 1.1192 1.1048 1.1479 38 5.83 1.1460 1.1189 1.1044 1.1432

( Rev. May 3,1999 8:53 AM l4 ,

9

M

.AEm W MH1 STONE UNrr 3 - CYCLE 7 MAY 1999 39 5.67 1.1460 1.1194 1.1027 1.1400 40 5.50 1.1452 1.1194 1.1023 1.1385 41 5.33 1.1440 1.1186 1.1020 1.1370 42 5.17 1.1422 1.1175 1.1012 1.1345 43 5.00 1.1401 1.1160 1.1000 1.1314 44 4.83 1.1375 1.1142 1.0985 1.1283 45 4.67 1.1346 1.1119 1.0967 1.1250 46 4.50 1.1312 1.1094 1.0947 1.1.212 47 4.33 1.1283 1.1068 1.0924 1.1168 48 4.17 1.1268 1.1039 1.0901 1.1120 49 4.00 1.1267 1.1010 1.0878 1.1070 50 3.83 1.1271 1.0988 1.0850 1.1016 51 3.67 1.1291 1.0976 1.0825 1.0961 52 3.50 1.1310 1.0982 1.0833 1.0909 53 3.33 1.1323 1.0990 1.0856 1.0875 54 3.17 1.1337 1.0991 1.0873 1.0860 55 3.00 1.1383 1.1078 1.0900 1.0869 56 2.83 1.1483 1.1220 1.0950 1.0923 57 2.67 1.1635 1.1370 1.1026 1.1020 58 2.50 1.1793 1.1525 1.1112 1.1125 59 2.33 1.1948 1.1683 1.1203 1.1228 3

60 2.17 1.2105 1.1041 1.1298 1.1332

- 61 2.00 1.2260 1.1997 1.1393 ,1.1435 62 1.83 1.2410 1.2149 1.1483 1.1534 63 1.67 1.0000 1.0000 1.0000 1.0000 64 1.50 1.0000 1.0000 1.0000 1.0000 65 1.33 1.0000 1.0000 1.0000 1.0000 66 1.17 1.0000 1.0000 1.0000 1.0000 67 1.00 1.0000 1.0000 1.0000 1.0000 68 0.03 1.0000 1,0000 1.0000 1.0000 69 0.67 1.0000 1.0000 1.0000 1.0000 70 0.50 1.0000 1.0000 1.0000 1.0000 71 0.33 1.0000 1.0000 1.0000 1.0000 ia 72 0.17 1.0000 1.0000 1.0000 1.0000 l 73 0.00 1.0000 1.0000 1.0000 1.0000

  • Distance from the bottom of active core (feet)

Rev. May 3.1999 8:33 AM 12

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