ML20096C128

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Cycle 4 Core Operating Limits Rept
ML20096C128
Person / Time
Site: Beaver Valley
Issue date: 04/30/1992
From:
DUQUESNE LIGHT CO.
To:
Shared Package
ML20096C127 List:
References
NUDOCS 9205130176
Download: ML20096C128 (6)


Text

{{#Wiki_filter:. . - . - - . - . - - - - . . . - - . . . - . . - . _ . - - - . . - . - . - . - - . - . - . - . . NPF-73 I BEAVER VALLEY UNIT 2 CYCLE 4 l COPJ,._Q ERATING LIMITS REPORT This Core Operating Limits Report provides the cycle specific parameter limits developed in accordance with the NRC approved methodologies specified in Technical Specification Administrative  ; Control 6.9.1.14. Specification 3.1.3.5 Shutdown Rod Insertion Limits The shutdown rods shall be withdrawn to at lobst 225 steps. Specification 3.1.3.6 Control _ Rod _Jnsertion Limits Control Banks A and B shall be withdrawn to at least 225 steps. Control Banks C and D shall be limited in physical insertivn as shown

                       'in Figure 1.

Specification 3. 2.1 Axial FluxJJflgrgILq.c NOTE: The target band is 17% about the target flux from 0% to 100% RATED THERMAL POWER. The indjcated 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 tne limits shown on Figure 2.

c.- Below 5 0 ?. RATED THERMAL -POWER may deviate outside the target band. apecification 3.2.2 F (Z) 9 . and Fxy Limits  ! Fg(Z) s CEQ

  • K(2) for P > 0.5 P

Fg(Z) $ CEQ

  • K(Z) for P S 0.5

, 0.5 Where: CFQ = 2.32 7= THERMAL _ POWER  ; RATED THERMAL POWER K(Z) = the function obtained from Figure 3.

                      ' BEAVER VALLEY - UNIT 2                                                           1 OF 6                 COLR 4                       APRIL 1992    l 9205130176 920430                                                                                                                                     )
                            .PDR        ADOCK 05000412 P                           PDR

4 _ .._._ . __ . . _ _ _ _ _ . - . _ . - _ _ . -_ _ _- - - - _ _ _ _ _ _ _ _ . . . - _ _ _ _ i

    . NPF-73 The       F             limits                 (F x     for     RATED   THERMAL      POWER within specific core pY5nes shall be:y(L))

Fxy(L) = Fxy(RTP) (1 + PFXY * (1-P)) Where: For_all core planes containing D-BANh: Fgy(RTP) 1 1.71 For unrodded core planes: , 1 Fxy(RTP) $ 1.67 from 1.8 ft. elevation to 2.6 ft. elevation l l Fxy(RTP) $ 3.74 from 2.6 ft. elevation to 4.0 ft. elevation l Fxy(RTP) $ 1.11 from 4. 0 f t. elevation to 6.20 ft. elevation l Fxy(RTP) $ 1.73'fron 6.20 ft. elevation to 8.80 ft. elevation l Fxy(RTP) 5 1.70 from 8.80 ft. elevation to 9.80 ft. elevation 1

                 -Fxy(RTP) $ 1.65 from 9.80 f t.

elevation to 10.2 ft. elevation l ,

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 haight during normal core operation. Foecification 3.2.3 FNDH FliDH S - CFDH * (1. +. PFDH * (1-P) ) . Where CFDH = 1.b5 PFDH = 0.3 P= THERMAL POWER 4 -RATED THERMAL POWER BEAVER VALLEY - UNIT 2 2 OF 6 COLR 4 APRIL 1992 I

t NPF 73 220 l I(54.53, 225)) 200 , y 180 ,

                                                                                            /                                                        LL100,1a7
                                                                                    /       BANK C 100                                        /

E.140 / o /

                                                                                                                               /
                                                                                                                                     /

k(0,11411 BANK D i: / 100 - -- g 80- ' - - k co 80 / - I 8 m 40 '

                                                                                          /

20 ' ' b(e,0)l 0 ,

                                          -0              10             20             30               40     50       60       70              80         90              100 RELATIVE POWER (Percent)                                                                             :

l_ FIGURE-1 [- CONTROL ROD INSERTION LIMITS AS A , c FUNCTION OF POWER LEVEL l BEAVER VALLEY - UNIT 2 3 c.,f 6 COLR 4 APRIL 92 I

NPF 73 , l , 100

  • I*II* 90]. III* *0) 00 ~ UNACCEPTABLE ..
                                                                                                                 ~   UNACCEPTABLE ~

OPERATION OPERATION g" i

                                                                     /                               \         ,

g / \

                                                               /                                                '

cr 70

             *50                                             /                                                     \
                                                      ,I         ACCEPTABLE OPERATION                                  \ '

50 _ ( 31, 50) (31, 50) b0 4

             '$ 30 5

L 20 10 - 0 50 -40 30 -20 10 0 10 20 30 40 50 l FLUX DIFFERENCE ( AI) % FIGURE 2 AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF RATED THERMAL POWER l l BEAVER VALLEY - UNIT 2 4 of 6 COLR 4 APRIL 92 l L l l ... - - .---.- - -. -- -.

NPF 73 1.2 1 (0,1.00) (e,1.00) 10 -~ (10.s, .e4) -

                                                                                                                                                       ~

7

                                   .90                                                                                                                                           \
                                                                                                                                                                                   \

(12, .s47) \ g g .so

                                   .40
                                   .20 I

0.00 -- i 0 2 4 s a 10 12 l i CORE HEIGHT (Feet)- L FIGURE 3 Fa' NORMAllZED OPERATING ENVELOPE, K(Z) BEAVER VALLEY - UNIT 2 5 of 6 COLR 4 APRIL 92 l

        --2._         . . _ . , _ . . .            -

_ _ . _ . . _ . . - . ~...__._---- _ . _ - _ _ _ _ _ _ _ _ _ _ - -

_ . . . _ _ _ _ _ . _ . _ . _ _ _ _ _ _ _ . . - = - - . _ . _ . _ _ . . _ . . _ . _ _ . _ _ _ _ _ _ _ _ _ _ _ . _ NPF 73

                                              ._..._..._.._..r---                            - - - - -- - -                       T - - --                      r---                       -- - -- q

[._ __. _ . _' d . _ _. .._.d_..._......_.. . _ . b _. _ _ _ } _._. __ . .a g,4 ..Q, 2,32 j___ __._ ._._- (6.0, $.55[ -- . .-.. k . . . -. . 8 I I 7- ]l i P~ f n i i?^'[. ^ i .: Sigg;iI 10.8, . _ - - -.- ..; 2.18)j._.~l _m 4 _. _. - _ _p __. # _ _..q____ .q 2.0 W-- - + - - - - A --- A nJ

                 ,                    ..                                              _b _ . _ _ _ _ -                                     _ _ . . . __.                      __

_ . _ .2 L _. . d .[  !....__ .._. _ _ _. . _ . - _- _ __._ ..,_ _. ,_ ._ _ .__. ._- E _ _.d. __ _ .. _..h

                                                                                                                                         -           I                     I
  • l J l __I l l p 1.67- -{-t.- L-~-.-

f r-- ]

                 .                  ______,                              .- c                                                                                                           .
                                                                                                                                                                            ,U 2.0,Mh 2                  _

l I___ t. t 2 l l l t i , a . _ . - - -

                                                                                            -_.                      ._.. 7 - _ .7- .-. -.

k 1,2 -- - BASIS FXY

                                                                                                                                                                                -f --

2 . - FROM 1.8 FT. TO 2.6 FT. 1.67 *

                                                                           'ABOVE 2.6 FT. TO 4.0 FT. 1.74                                                                                    i          . ) -__-

ABOVE 4.0 FT. TO 6.2 FT. 1.71 ~ ~ T~ ~1 4'; ABOVE 6.2 FT. TO 8.8 FT. 1.73 - -+ - '--i

                        .80         -                        )             ABOVE 8.8 FT. TO 9.6 FT. 1.70                                                                        -__L---_.---

ABOVE 9.8 FT. TO 10.2 FT. 1.65 p _ ,l _ _4 } _ . i h. ._ _ . . _ , . .

                                                                                                       +_ _ -
                                                                                                                                        !            I;

_ _ _ . . _ . _ . _J _ _. 0 2 4 6 0 10 12 CORE HEIGHT (Feet) FIGURE 4 l MAXIMUM ( Fa'* Pngt) VS AXIAL CORE HEIGHT l DUPING NORMAL CORE OPERATION L l BEAVER VALLEY - UNIT 2 6 of 6 COLR 4 APRIL 92 l

     . _ _ . _             _. . . . _ . _                  _             _        __                        . . _ . _ _                 _ _ _                   _. __                                                                  . _ .}}