ML20129A863

Cycle 7 Colr

ML20129A863
Person / Time
Site:	Beaver Valley
Issue date:	10/10/1996
From:	DUQUESNE LIGHT CO.
To:
Shared Package
ML20129A849	List: ML20129A844 ML20129A863
References
NUDOCS 9610220260
Download: ML20129A863 (6)

Text

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NPF-73 BEAVER VALLEY UNIT 2

! CYCLE 7 l CORE OPERATING LIMITS REPORT l 1 This Core Operating Limits Report provides the cycle specific '

parameter limits developed in accordance with the NRC approved methodologies specified in Technical Specification Administrative l Cont--l 6.9.1.12.

Snecification 3.1.3.5 Shutdown Rod Insertion Limits The shutdown rods shall be withdrawn to at least 225 steps.

Soecification 3.1.3.6 Control Rod Insertion Limits Control Banks A and B shall be withdrawn to at least 225 steps.

' Control Banks C and D shall be limited in physical insertion as shown in Figure 1.

Soecification 3.2.1 Axial Flux Difference NOTE: The target band is 17% about the target flux from 0% to 100% RATED THERMAL POWER.

l The indicated Axial Flux Difference:

a. Above 90% RATED THERMAL POWER shall be maintained within the 17% target band about the target flux difference.

b. Between 50% and 90% RATED THERMAL POWER is within the limits shown on Figure 2.

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c. Below 50% RATED THERMAL POWER may deviate outside the target band.

Specification 3.2.2 Fg(Z) and Fxy Limits l Fg(Z)$C.EQ*K(Z) for P > 0.5 1

P Fg(Z) 1 SEQ

• K(Z) for P $ 0.5

0.5 Where

CFQ = 2.40 P= THERMAL POWER '

RATED THERMAL POWER K(Z) = the function obtained from Figure 3.

1 OF 6 COLR 7 l BEAVER VALLEY - UNIT 2 9610220260 961010 r PDR ADOCK 05000412 P PDR

4 NPF-73 4

The F limits (Fxy(L)] for RATED THERMAL POWER within specific corep[anesshallbe:

Fxy(L) = Fxy(RTP) (1 + PFXY * (1-P))

Where: For all core planes containing D-BANK:

Fxy(RTP) $ 1.71 i

For unrodded core planes:

Fxy(RTP) $ 1.75 from 1.8 f t. elevation to 5.7 f t. elevation Fxy(RTP) $ 1.81 from 5.7 ft. elevation to 8.7 ft. elevation Fxy(RTP) $ 1.77 from 8.7 ft. elevation to 9.7 ft. elevation elevation Fxy(RTP) $ 1.72 from 9.7 f t. elevation to 10.2 f t.

PFXY = 0.2 P= THERMAL POWER RATED THERMAL POWER Figure 4 provides the maximum total peaking factor times relative T

power (Fg *Prel) as a function of axial core height during normal core operation.

Specification 3.2.3 FNDH FNDH $ CFDH *(1 + PFDH *(1-P))

I Where: CFDH = 1.62 PFDH = 0.3 P= THERMAL POWER l RATED THERMAL POWER 4

1 BEAVER VALLEY - UNIT 2 2'OF 6 COLR 7 l

NPF-73 220 [ j 54.53,225 i I'

200 f l100,187 g

3: 180 f BANK C j 160 f

/

E 140 z 120 7

/ pf l

l 0,114 l BANK D ,/

100 Q- /

W 60 O '

U~ 40 20 8, 0 l

' \

o 10 20 30 40 50 60 70 80 90 100 0

RELATIVE POWER (Percent) .

FIGURE 1 CONTROL ROD INSERTION LIMITS AS A FUNCTION OF POWER LEVEL BEAVER VALLEY - UNIT 2 3 of 6 COLR 7 I

j 1

NPF-73 1

100 )

E -11, 90 11,90 l

~

UNACCEPTABLE UNACCEPTABLE ~

OPERATION / \ OPERATION 2* / \

g /

/ \ '

c 70 60 b ACCEPTABLE OPERATION 50 'i

-31, 50 31,50 u.

0 40 l

$ 30 l 5

1 20 10 0

-50 -40 -30 -20 -10 0 10 20 30 40 50 FLUX DIFFERENCE (AI) % l FIGURE 2 AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF RATED THERMAL POWER l l

l BEAVER VALLEY - UNIT 2 4 of 6 COLR 7 l 1

NPF-73 1.2 0,1.00 6,1.00 1.0

-- 12.0,.925 -

~

.80 8

g .60

.40

.20 0.00 2 4 6 8 10 12 0

CORE HE!GHT (Feet)

FIGURE 3 FdNORMALIZED OPERATING ENVELOPE, K(Z)

BEAVER VALLEY - UNIT 2 5 of 6 COLR 7 I

NPF-73 I I 0.0,2.40 6.0,2.40

[ Sin" ,MXfM@ff M92 % % 12.0,2.22 WMfCE)(y M p'%

f_\ '-fl # , /

2.2 g 2.0

^ ^

i o n 1.8 g d i 6 b-o ct A

+

, H O l '4 2

D 1.2

~

E BASIS FXY FROM 1.8 FT. TO 5.7 FT. s 1.75 M ABOVE 5.7 FT. TO 8.7 FT. s 1.81 4

.80 -,

ABOVE 8.7 FT. TO 9.7 FT. s 1.77 ABOVE 9.7 F. TO 10.2 R. s 1.72

.60

. b A

.40

/k A

.20 0

0 2 4 6 8 10 12 CORE HEIGHT (Feet)

FIGURE 4 AL CORE HEIGHT MAXIMUM (Fd* PREL)

DURING NORMAL CORE OPERATION BEAVER VALLEY - UNIT 2 6 of 6 COLR 7  !

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