ML20197H969

Rev 0 to Callaway Cycle 5 Core Operating Limits Rept

ML20197H969
Person / Time
Site:	Callaway
Issue date:	09/30/1990
From:	Kapil S, Pogorzelski N UNION ELECTRIC CO.
To:
Shared Package
ML20197H964	List: ML20197H960 ML20197H969
References
NUDOCS 9011200285
Download: ML20197H969 (15)

Text

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4 Callaway Cycle 5 key. 0-

)

i Callaway Cycle 5 Core Operating Limits Report Septader, 1990 r

Reviewed by:

8 5' i

N. A. Pogorzelski-Core Design E f

Approved by:

44 St.K. Kapil, Manager Core Design E Page 1 of 15 90112002e5 903114 fDR ADOCK 0500o4g3 PDC

Cl411away Cycle 5 Rev. 0

1. 'O CORE ~ OPERATING LIMITS REPORT This Core Operating Limits Report. (COLR) for Callaway Plant Cycle 5 has been prepared in accordance with the requirements of Technical Specification 6.9.1.9.

j

-The. Core Operating Limits affecting the following Technical Specifications are included in this report.

3.1.1.3 Moderator Temperature Coefficient 3.1.3.5 Shutdown Rod Insertion Limit 3.1.3.6 Control Rod Insertion Limits 3.2.1 Axial Flux Difference i

3. 2. 2 -

Heat Flux Hot Channel Factor 3.2.3-Nuclear Enthalpy Rise Hot Channel Factor t

P V'

t j !

lu l'

i t-Page 2 of 15

Callaway Cycle 5 Rev. 0

' 2. 'O OPERATING LIMITS

.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 specified in~ Technical Specification 6.9.1.9.

2.1 Moderator Temoerature Coefficient t

I (Specification 3.1.1.3)

I 2.1.1 The Moderator Temperature-Coefficient shall 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 coefficient shall be less negative than -41 pcm/'F.

This limit shall be referred'to as the Endsof Cycle' Life (EOL)' Limit.-

-2.1.2 The MTC 300 ppm surveillance limit is -32 pcm/*F (all rods withdrawn, Rated Thermal Power condition).

J l

K l

1; I

l l

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Page 3 of 15 i

t FIGURE 1 I

MODERATOR TEMPERATURE COEFFIC!ENT VS POWER LEVEL

-1.r.......................................................................

4

7..,

mAas opeunON.........................,-

l a............. L.

3,70, 5..

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............'.........:.............................................!.5 4 }r-I L

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...y

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g.......................................................................

l-"T-r- ' ~

r r T-- r-i Tri

- r-T j

i 10 20 30 il 50 il il 11 il 100

% OF RATED THERMAL POWER L

l l

PAGE 4 OF 15 vv-.,

,-,-a v-e-

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-Callaway Cycle 5 Rev. O 2.' 2 Shutdown Rod Insertion-Limits (Specification 3.1.3.5)

The shutdown rods shall be withdrawn to at least 225 steps.

2. 3' Control Rod Insertion Limits (Specification 3.1.3.6)

The Control Bank Insertion Limits are specified by' Figure 2.

i

.,i, s.

Page 5 of 15

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t

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FULLY WITHCRAWN (725 steps or hi;ter) 225 ~

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^

220

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200

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20 40 60-80 100 PULLYINSERTED RATED THERMAL POWER (Percent) l FIGURE 2

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ROD BANK INSERTION LIMITS VERSUS RATED THERMAL POWER - FOUR LOOP OPERATION CALLAWAY - UNIT 1 Th ta 6.3 C 15

~.

1 Callaway Cycle 5 Rev. 0 2.4-Axial Flux Differe,ngs (Specification 3.2.1) 2.4.1 The Axial Flux Difference (AFD) target bands

are, a.

+3%,

-12% for Normal Operation b.

13% for Restricted AFD Operation 2.4.2' The Acceptable Operation Limits are'shown in-Figure 3.

2.4.3 The minimum allowable power lggel for Restricted AFD Operation, APL is 90% of RATED THERMAL POWER.

s Page 7 of 15

AXIAL FLUX O!FFERDCE LIMIT 5 A5 A Fu c7 ten of a m s THU Wu POW U

,_.8

s

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-., 2._

---

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g jl=

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E UNACCEPTABLE it.11.901:

- (11, 901 5! UNACCEPTABL2 lE'=

CPERATION

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3 E0 0

R.UX OtFFERENCE ( AD%)

CALLAIAY - UNIT 1 FIGURE 3 L

Page 8 of 15

.. ~

9

? '

Callaway Cycle 5 Rev. 0 x

~

2.5 Heat Flux Hot Channel Factor - Fg(Z)

(Specification 3.2.2)

RTP' F

F (Z) 5 S---

-* K(Z) for P > 0.5 9

P RTP F

i F (Z) 5 9---

• -K(Z) for P $ 0.5 g

0.5 THERMAL POWER where: P = -------------------

RATED THERMAL POWER-2.5.1 F RTP = 2'.50 g

2.5.2; K(Z).is.provided 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 F surveillance are shown in 0

Figures 5 through 8.

Because significant margin exists between the

. analytically determined maximum F z)*P

' values'andtheirlimit,Restricteh(AxiaI*hlux Difference (RAFDO). operation is not expected to be required;for Cycle 5.

For this reason, no W(z)RAFDO values are suppliedLfor Cycle 5.

The Normal Operation W(z): values, W(z)Ug, have been determined.for three specifi burnups in' Cycle 5.

-This permits determination of W(z) at any cycle burnup through the use of three point interpolation.

The W(z)Uherates with the CAOC strategy and values were determined assuming Cycle 5 uses-a +3%, -12% delta-I band about the-target flux difference.

Also included is a W(z)$21 Cycle 5 burnups. function that bounds the W(z)Ngound curve for Use of the W(z)5o 'urve will be conservative for any c

Cyc1 5 burnup, however additional margin may Page 9 of 15

a

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FIGURE 4 1

K(Z);- NORMALIZED FQ(Z) AS A FUNCTION OF CORE HEIGHT 1

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PAGE 10 OF 15 1

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l CALLAWAY UNIT 1 CYCLE 5 BOUNDING W(2) FOR CYCLE 5 NO

• Top and bottom 15% excluded as per Tech Spec 4.2.2.2G Page 14 of 15

,j

,7,;.<-

-.a l

. Callaway Cycle 5 Rev. 0 be gained by using~the burnup dependent W(z)No values.

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

[

i N

2.6 ' Nuclear Enthalov Rise Hot Channel Factor -

FAH (Specification 3.2.3)

~F

" 's - F (1 + PFg(1-P)]

i g

g where:

THERMAL POWER p....................

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F

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2.6.2 PF

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2.7 'Refuelina Boron Concentration (Specification 3.'9.1) 4 2.7.1 The' refueling boron concentration to maintain k,ff $ 0.95 shall be 2: 2000 ppm.

Page 15 of 15

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