ML20099K289

Rev 1 to Callaway Cycle 6 Colr

ML20099K289
Person / Time
Site:	Callaway
Issue date:	06/25/1992
From:	Hone M, Sheila Ray, Secker J UNION ELECTRIC CO.
To:
Shared Package
ML20099K286	List: ML20099K285 ML20099K289
References
NUDOCS 9208260021
Download: ML20099K289 (17)

Text

-- . . _ . .

, Callowsy Cycle 6 Rev.1 Ca!Jaway Cycle 6 Core Operating Limits Repon June,1992

'XL W c>L J. R. Secker L R. Rio& s Core Design E Core Design E Date: Llt 9 Rt Date: 4.)y 9A ~

VERIFIED: hl 8* M ht J. Hone

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Core Design E ,

Date: yas-/w

-{tm uuetzAn turc amtyt K APPevAU

.%,32/iOA o.u/4u sa s ,. a.,, ,..,

APPROVED: / 4prw=1 pb M M A 4 o.a: / NL S. ay, Ma rage /uk inn ' sun./.nc. Hoew row Core Design E PAGE 1 OF 17 I

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. Callsway Cycle 6 Rev. I 1.0 C9RE OPERATING LIMITS REPORT j nis Core Operating Limits Repon (COLR) for Callaway Plant Cycle 6 has been prepared in accordance with the requirernents of Technical SpeclDcation 6.9.1.9.

The Core Operating Limits affecting the following Technical Specificatioru are included in thh repon.

3.1.13 Moderator Temperature Coefficient 3.13.5 Shutdown Rod Iraertion Limit 3.1.3.6 Control Rod insertion Limits l 3.2.1 Axial Flux Difference 3.2.2 Heat Flux Hot Channel Factor 3.23 Nuclear Enthalpy Rise Hot Channel Factor 3.9.1 Refueling Boron Concentration e

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PAGE 2 OF 17 i

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Callaway Cycle 6 Rev.1 2.0 OPER ATING LIMIM The cycle specific parameter limits for the specifications listed in Section 1.0 are presented in the subsections which follow. These limits have been developed using the NRC.

approved methodologies speciGed in Technical Specification 6.9.1.9.

2.1 Moderator Temperature Coefficient (SpeciDeation 3.1.1.3) 2.1.1 The Moderator Temperature Coefficient shell be less positive than the limits shown in Figure 1. These limits shall be referred to as the Beginning of Cycle Life (BOL) Limit.

The Moderator Temperature Coef0cient shall be less negative than -41 pcm*F. -.

This limit shall be referred to as the End of Cycle Life (EOL) Lirnit.

2.1.2 The MTC 300 ppm surveillance limit is 32 pcm*F (all rods withdrawn. Rated Thermal Power condition).

mm PAGE 3 OF 17

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PAGE 4 OF 17

Callaway Cycle 6 Rev.1 2.2 Shutdown Red Insertion Limit;(SpeciGcation 3.1.3.5)

The shutdown rods si.all be withdrawn to at least 225 steps.

2.3 Control Rod Insertion Limits (SpeciGcation 3.1.3.6)

The Control Bank Insertion Limits are speciDed by Figure 2.

3 E

PAGE 5 OF 17

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FIGURE 2 CALLAWAY UNIT 1 CYCLE 6 ROD BANK INSERTION 1.lMITS VERSUS RATED TkERMAL POWER - FOUR LOOP OPERATION PAGE 6 OF 17

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. Callaway Cycle 6 Rev.1 2.4 Atial Flut Difference (Specification 3.2.1)  !

i 2.4.1 De Axial F1'tt Difference (AFD) Limits are provided in Figure 3.

2.4.2 The target band during Restricted AFD Operation is 3rc.

2.4.3 The minimum allowable power level for Restricted AFD Operation. APLND. is 907c of RATED THERMAL POWER.

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FIGURE 3 CALLAWAY UNIT 1 CYCLE 6 AXtAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF RATED THERMAL POWER FOR RAOC PAGE 8 OF 17

Calloway Cycle 6 Rey,1 2.5 11 eat Flux Hot Channel Fartor Fe (Z)

(Specification 3.2.2)

Fo ""

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• K(Z) for P > 0.5 P

FoRU Fo(Z)1

• K(Z) for P s 0.5 0.5 THERMAL POWER where: P=

RATED THERMAL POWER 2.5.1 FoRU = 2.50 2.5.2 K(Z) is povided in Figure 4.

2.5.3 The W(z) functions that are to be used in Technical Specifications 4.2.2.2, 4.2.2.3, and 4.2.2.4 for Fosun'eillance are showm in Figures 5 through 10.

Because significant margin exists between the analytically determined maximum Fo(z)

• Pg va)ues and their limit, Restrict;d Axial Flux Difference (RAFDO) operation is not expected to be required for Cycle 6. For this reason, no W(z)narDo talues are supplied for Cycle 6.

The Normal Operation W(z) values have been determined for several burnups up to 16000 MWD /MTU in Cycle 6. This permits determination of W(z) at any cycle burnup up to 16000 MWD /MTU through the use of three point interpolation.

For cycle burnups greater than 16000 MWD /MTU, use of the 16000 MWD /MTU W(z) values without interpolation or extrapolation is censervative. The W(z)go values were determined a,suming Cycle 6 operates with the RAOC strategy. Also included is a W(z)so function that bounds the W(z)no cune for all Cycle 6 burnups. Use of the bounding W(z)so curve will be consenative for anv Cycle 6 burnup; however, additional margin may be gained by using the burnup dependent W(z)so values.

The W(z) values are provided for 73 adal points assuming the core height boundaries of 0 and 12 feet and intervals of .167 feet between the core boundaries.

PAGE 9 OF 17 l

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l CALLAWAY UNIT 1 CYCLE 6 K(Z) - NORMALIZED FQ(Z) AS A FUNCTION OF CORE HEIGHT PAGE 10 OF 17 l

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FIGURE 5 CALLAWAY UNIT 1 CYCLE 6 W(Z), AT 150 MWD /MTU Top and bottom 15'i excluded as per Toch Spec 4.2.2.2G PAGE 11 OF 17

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FIGURE 6 CALLAWAY UNIT 1 CYCLE 6 W(2), AT 2000 MWD /MTU ,

Top and bottom 15% excluded as per Tech Spec 4.2.2.2G l

PAGE 12 OF 17-

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• Top and bottom 15. excluded as per Tech Spec 4.2.2.2G PAGE 13 07 17

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FIGURE 8 CALLAWAY UNIT 1 CYCLE 6 W(Z)m AT 12000 MWDIMTU l

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PAGE 14 OF 17

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• Top and bottom 15% excluded as per Tech Spec 4.2.2.20 PAGE 15 OF 17

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Top and bottom 15% excluded as per Tech Spec 4.2.2.2G PAGE 16 OF 17

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PAGE 17 OF 17