Latest revision as of 01:32, 22 February 2020

Text

Proposed Revised Page 3.10-5 to Tech Specs for Rod Misalignment Limitations
	ML19290D632
Person / Time
Site:	Prairie Island
Issue date:	02/20/1980
From:	; NORTHERN STATES POWER CO.
To:	;
Shared Package
ML19290D617	List: ML19290D616; ML19290D626; ML19290D632;
References
	TAC-13038, TAC-13039, NUDOCS 8002220428
	Download: ML19290D632 (8)
	v • d • e

{{#Wiki_filter:. Exhibit A Prairie Is. lard Nuclear Generating Plant License Amendment Request dated February 20 , 1980 Proposed Changes to the Technical Specifications Appendix A of Operating Licenses DPR-42 & -60 Pursuant to 10 CFR 50.59, the holders of Operating Licenses DPR-42 and DPR-60 hereby propose the following changes to Appendix A, Technical Specifications. Specification 3.10.E (Rod Misalignment Limitations) Proposed Changes

1. Change the first sentence of Specification 3.10.E.1 to read-

           "If a full-length or part-length rod control cluster (RCC) assembly is misaligned from its bank as described in 3.10.E.2, the rod will be realigned or the core peaking factors shall be determined within 2 hours and Specification 3.10.B applied."

2. Add Specification - 3.10.E.2 as follows-

       "2.(a)    If the bank demand position is greater than or equal to 215 steps, or less than or equal to 30 steps, and the rod position indicator channel differs by more than 24 steps, that rod control cluster shall be considered misaligned.

(b) If the bank demand position is between 30 steps and 215 steps, and the rod position indicator channel differs by more than 12 steps, that RCCA shall be considered misaligned."

3. Change Specification 3.10.E.2 to read-

       "3.       If the misaligned rod control cluster is not realigned within a total of 8 hours the rod shall be considered inoperable.

Reason For Change By letter dated October 29, 1979, A Schwencer (NRC) to L 0 Mayer (NSP), the NRC Staff requested Northern States Power Company review the existing - Technical Specifications regarding RCCA misalignment to determine if control rods are required to be maintained within +12 steps indicated and rod position indication (RPI) system verified to be accurate within 12 steps. By letter dated December 5,1979, L 0 Mayer (NSP) to Director of Nuclear Reactor Regulation (NRC), NSP notified the NRC that it planned to submit a technical specification change. Safety Evaluation The individual rod position indicator (IRPI) channel readings as rods are withdrawn typically do not show exact agreement with the bank demand position stepcounter as shown in Figures 1-4. In Figure 1, the IRPI were calibrated to agree with bank demand position at 20 and 200 steps. In Figures 2-4, the IRPI were calibrated to agree with bank demand position at 20 and 210 steps, the ranges normally encountered when the plant is shut down 3 o02220 m g

or operating, respectively. 'Ihe maximum deviation from bank demand was 13 steps (Figure 3) in tests conducted at Hot Zero Power (HZP). As power is raised, the temperature in the vicinity of the RPI coils should increase and could cause possibly higher deviations. For this reason, agreement to within +12 steps of bank demand position cannot be assumed and specifications as 3.10.E.2 are proposed. Sensitivity of core behavior to rod misalignment is of greater significance when the rods are inserted further into the core because of the higher rod worth in that region. The safety analyses are typically conducted with the maximum F0 (2.32), a condition expected when rods are inserted closer to the insertion limit. Note that Technical Specification 3.10.B. limits F to 2.21 based on ECCS requirements so that anq F of 2.32 is not allowed.9 Safety analyses typically assume a ryecified scram reactivity and correspond-ing insertion limits. If rods are at the insert ion limit and misaligned excessively, the actual scram reactivity could be dif ferent from that assumed. Likewise, if rods are inserted into the central core region, a more profound ef fect on power distribution might be expected than if rods are placed in the peripheral regions, where rod worth is less. If the rods are nisaligned as described in revised Specification 3.10.E.2(a) or (b), rod realignment corrects the problem. If this is not done (or the readings are erroneous), determination of the core peaking factors provides assurance that the assumptions of the safety analyses (Fq and Fg) are complied with. On this basis, greater tolerance is allowed in the peripheral regions than in the central region. For these reasons and the fact that these changes are more restrictive than the current specification, there should be no significant effect on the public health and safety. D c) fh J JO hlh dhuu h.M h J[}b on [ Calibrated at 20 and 200 steps t-

                      ,k                           '

lli' i , l....l..;.l__.. . .l . . . _ . lt ... l I l

b. . . f.. ':f[i.

i:

                                                                                                                                                                                                                                . ! f,                 .

[il ;i l'I; .,..'..'

l

                                                                     ,                                             ,                                                                   l.                                               c                            ..,        ,J.q@l:, .1. ./ .

p.

                                ._._..'                             l.._

7 f ! 1.

                                      ,                       ..f                                                                                                                 ,f, :                                            .;.                    ....

p. __.7.

                                                                                                                                                                                                                                                                                                     .l..             ,
                                                                                                                                                                                                                                                                                                       , . l -/

i ;

- l- * -

                . gg .
                                    ..!_....                        I                                                                                    t                             8                      '                                                    '-                              -'                           -l-y I.
                                                                                                                                                                                                                                                                                                     .:'W .'.

1 I. l

                                                                                                                                                                                                                                       !!                          j-                                                            ih
                                                                .j-                                    I I
                                                                                                                         . . . . . . . .                                   .;.__                       .j ;

l, .

                                                                                                                                                                                                                                                                                                                                  ,f..
                                                                    ;                   ;                        ;                           i                                    I                    .n                              L                                   :rr                 A3 0                              :I J:OO-                 ,,                            .                                                                                                   +                                                                                                                                                                       -

. r7f *'*:.'. . .d . ' .L

                 ,                                                  I l                        1                                      l        ,
                                                                                                                                                                                  ; f ;..                           ,

!: .l.: 1 i j . . _ . . . ' ___ _ ; ; t "-

r: ; D :,

                                                                                                             .f'....L_       1.                         ;
                                                                                                                                                                                 . {:

I l

fy. , . _ ,

I :! .~

1:

t ; : .

                                                                                                                                                                                                                                                                                       .i.                                       ,
                                            . ._ j .                   ....p..___.._                                 _p                        -
                                                                                                                                                                                                 . ' g ,.:                        ,,

p_ _.'- '

                                                                                                                                                                                                                                                                                                     . } . . ..                           .

h l.gg _._L_..-_. ._ _ __ L 3 N' g I' u a l l

j. . '

[; . ' ^ u-L-

                                                                                                                                                                                                                                                                                       .l::: g . l T ,Q .I, 3-V i

ek F - T 1

                                                                                                                                                                                        . %. I. ..-                                                                                                               c.s i l                                                              .                                          i e

O l i 1 >

                                                                                                                                                                                                                                                                                      .1: .Q i                                                                                e                                                                                                                         j                                  .

w ,

                                                                                                               !..                               . . _ . . . . ,                                ._.                   .                     . . . . _ . .                     _.;_N..                                     _ ., [. ..

g e g.l.. ..J.. i i

                                                                                                                                                    .l<                   - l:*.                         '                           '                           !                    - I,
                                                                                                                                                                                                                                                                                                                               . I' :
                                              .i                             . . . . , . _ . _ . _ _ _ _                                                              .
                                                                                                                                                                                         ;'           .f.                                                                                                     ',                                 j
   ]                                                                                  !.                      l                      . .j.                                ...                   _ . . .                       .; f. ..                              ._                . . .                   '_.         _.;

Cd

                                                                                                               ;                  'g                  ;                             ':                                              j:                          i
   ,                 pp                                                                                        -
                                                                                                                                  ..,9
                                                                                                                                                                                                                                                                 ~
                                                                                                     , . .5 ..                                        .
                                                                                                                                                                                                                                                                                                          .u          . . . .          ..

t.,4 *

    >                                            '                l                                         L .                                                                                                                                                                                                                                'l

5. ' - . .

                                                                                                                                          !                                                                                                                                                                 I-t c
                                                                                                            ,I. j, '                  I l              i i

1- .

                                                                                                                                                                                                                                                                                      -l  -

r 1, . -i i i , . , .p .j i- i .n

p. .. 4. . .. ( , .

                                                                                                                                                      '              '                        l                                                               '                          !                  l II _

4 -

                                                                                                                          ..l
                                                                                                                                                                     }                                                                                                                    ,

t. .

                                                                                     .F
                                                                                                                                                                   .I.
                                                                                                                                                                                         -..p.._

t

g. - - - - - -

                                                                                                                                         '                                                                                                                                                                                   ^
            ;-fy-                         ---- - , g.,                                                                                   ,
                                                !       .     ..Ag
                   . gp . ,                          .              _ . . . . _
                                                                                             ..._..,.                                    p__.._._!.                                                                                            .I
                                    ... [h -
                                        .                       t                                            '                           r
                                                                                                                                         ,           .]            .
                                                                                                                                                                                                                             . i . ,i.                        i

_ .y . . .

                                                                                                                                                                                                                                                                                         !         _.. j ;                   :i:

i l l _l ; i ! q-i O@+-- 20 YO i SO . / 0 , /$O ;\lW lWil4W 1N;WO

                                                                                                                                                    . r-                 -
                                                                                                                                                                                         ,      .. - ----r..--                         .
                                                                                                                                                                                                                                                           .r.

We : .. I ' t_ . . . . l 3.. -

                                                                                                                                                                                                                                                          .l.           '

Stepcounter Reading FIGURE 1 Comparison of Bank and Individual RPI Readings Control Bank D

Calibrated at 20 and 210 steps

                                      '.i                                        ;'              N,                 '-

ih hf %!!;i -

!U

                                                                                                                                                                                                                                   !!!! l[!!               !$ !$                  !NOlN.! [01 !ll! !N! h!! lhj O!!
                                                                                                                                                                                                                                                                             ,                .i. ..
                                                                   .'.i.i                                                      1.                                            .i.,                      !;:. l:                                  3-1, "             ;:                     "                         .,
                                                                                                                                                                                                                                                                                                                                     -     1...

t .t..r .3 1

                                                                                                                                                                                                                                                                                                                                                                                         , t'
                                                                                                                                                                                                                                                                                                                                                                                         . t;
                                                                                                .i                                                                                 t                                                                                  ;                                                                                                    u:j s7,                                                                      :l.. -

l_:".

                                                                                                                                                                                                                                                                                                                                              ,                                          tt:
                                                                                                                                                                                                                                                                                         -                                                 -               M,;-                          - r-
                                    . ._ . . g . p . .                                                      ..
                                                                                                                    . , . _ , . ._                                                7                                          _
                                                                                                                                                                                                                                                                                                                               , r.,

g i 4 .i - a i

                                                                                                                                                                                                                                                                                                                        ..w .g+ g                                   .
                                                                                                                                                                                                                                                                                                                                                                                 .      tt.y,:.
                                   --{- .                 ,
                                                                                                                        .[                        :l:.                                                    .@.                                       ,

u. c -

                                                                                                                                                                                                                                                                                                              .-d :.:Nfr: i.:iy,iji
                                                                         !.:*                       I                   -[                                                        .
                     .y           --
                                                                                                                                                  . I n. n
                                                                                                                                                     ..                          I' i    ..
                                                                                                                                                                                                                                                                                 ...              . .g. E.
                                                                                                                                                                                                                                                                                                  ,.         . -.ih :- . t.I                  . - t.: : :H
                                                                                                                                                                                                                                                                                                                                                                          . . .n.t..:i. i . t:. ,

1.' i,

                                                                                                                  .                          . :i.                               t               in                                   .,                                s.       .-                                                                           .:          i:           tti:

n -

. + --

                                                                                                                                                                                                                                                  .- ' m . . [,,-[r:                    :: .-                                                                                                ~
                                                                                                                                                                                                                      , '             .           ..         - .q r .. .                                     ---         -

I:ii I

k. "

Sir. !i:, . li:: ifrii: !!I! : :4yM :;ili-

                 --] p

!:. b

                                                                                                                                                                                                                    ..                    p...

r ,- .:.t

.,:: y -

l .g:,:. '

                                                                                                                                                                                                                                                   ;_- q _. . "~

m

                                                                                                                                                                                                                                                                                                                   .Q-i                                                      l
                                                                                                                                                                                                                                                                                  ~             -                                                                                          ~-
                                                                                                                                                                        ..J a                                                                                                                                                                                                                                                                                                                                                  :ll 0-                                             i S                                                                                               .

I- i.: '. ":q ! ::,7 .i , . :2 n. n : . :, :::.

:in -

                                                                                                                                                                                                                                                                         ;-       d-                                   I: .1d d: .:..g:                                         : an u        -)%e             -
                                                      ,l                                           l                       l l

v

                                                                                                                                                                                                                                                                                                                                                       ,.=
                                                                                                                                                                                                                                . $. . .d m

o - v .l- i .. .

                                                                                                                                                                                                                                   ' ."                                         a:.            :.                                                                 :                    ::::

3l: .=i p :. i i - i q ._.._ ;__. . - t - e I i

                                                                                                                                                                                                         ,.         ,-+.           ..- . . .                                                                           .. '                            -

_:i,:;

                ~~                                                                    ~ ~~
                                                                                                                                                                                                                                                                                                                                                   .l.                          .it,.

l I . l'

                                                                                                                                                                                                                                                                                                                                                               .{                     .
      ;                                                                                                                                   _ _ a_.                              '-                                                #                           d:._
                                                                                                                                                                                                                                                                                                                                                               ~                   g '"
                                                                                        ._.3__.. _ . ! ._

o i :i.r. .l.ng2

'lf

6. . . . tl' J, ! 7 fl ,

m .; . -.-

                                                                                                                                                                                                                                                                                                                                            . 4.                                      .;p.

4 - i . p i 3 t

                                                                                                                                                                                                                                                          .r . ..                 . .. .       ..

r. i .

                                                                                                                                                                                                                                                                                                                                                  .l:..* u.q::n.

o g4

                                           ,                        ,                            =
                                                                                                                                     .l . i i.                                ..                  .-                                -

le: . n. M.,: ; ._.

                                                                                                                                                                                                                                                                                                                                                                               ~~*'~

n

                                        .;          ' .;                                                                  l                      .l-            Q.        -*l ~* . .t,.,;.
                                                                                                                                                                                                                                                                                               ,,'             'l.
                                                                                                                                                                                                                                                         ..                                                                                       . l :_ ... ,..j ;.in.

_/4 . , . g }' 1 .. . . .- . .. : p :n _ p- 1

                                - .:_. .                                                                                                                                                                                                                                                                                                              I*...

Q 3 - _ . .

                                                                                                                          . . . >. .__1(
                                                                                                                                                                                                           }l

p. . .

     =c        -      -S. ,-
                                                                                                                                    ...l.:.-
                                                                                                                                                                          .i.

i :.r.. . - l:. ;. n. g .(. l j;' . ,

                                          ,                                                                                                                               .                       4                                                                                      ..
                                                                                                                                                                                                                                                                                                                                                                                         .I.

t[.i

                                                                                                                                              '                                                        ~

H . _1. . _ ;U :UM; h_- -

                             ~
                                 ~ h. ; d 3                                                              -

n .!" ! . Nii' @ _r '- .h '$ -- li:

                                       .j          ! . i .h -                                .;. 4 .l'_l_.:l...

th .ii' HU . i- :W 'iF . d:. -.. .. .:' i Fij; i

t i .-

                                                          .3
                                                                                                                                                                                                                                               .:.--                                   .                                                         :t.-                            , :n a           :
                                                                                   ..          i i
                                                                                                                                                -l::                        -
                                                                                                                                                                                                                                                         - :h.                                                   . h' -                              n                           ::-:-
                                       .1         !           :i:            ,    M4-                                                                                     .j-                             ;l;

l: :;

                                         '. g ._..L t

__'__,l...._ 1

l: ; -

                                                                                                                                                                                                                                                                                                            ._ l .' .                                     .:

li:: i _:_ _; I /.. _..j p - . l I i l'

                                                                                                                                                                                                  .:f:                                .l'..                   'l:                  .          :                  :f:                                    ,                           ;d:

q - j'

                                                                                                                                                                            .                                                              I                                                                     -!*                                                             ;-4
                                 ..,..                                          .         _ . .                  . _ _i + - . .. .-

1:'

l:

                                                                                                                                                                                                                                                                                        *1:                                      .               .}'.., :
                                                                                                                                                                                                                                                                                                                                                                         . . . l . ; .7
                                                                                                                                                                                                                                                                                                             ...[,                                                                           ,
                                                                                                                                                                                                                                                                                                 .                 1. :
                                                                                                                                                                                                                                                                                                                                 .     ' .; . . f .:, *
                                                                                                                                                                                                                                                                                                                                       ..                                     . l 3. ". .
                    ..[                                                                                                I gg:fI[W.3%g:fhh]                                                                                                     hl. Mhf M                                                       {.f D                           i                 kh
             ~ ~ - - ' "
                                - r.)..I.h . h .., ...h -
                                                                                                                                                                                                                                               .g4         ,
                                                                                                                                                                                                                                                                    .y.            .             6.,                                   .                              ..           W
                                                                                                                                                                                                                                                                                                                                                             ,4
                                                                                                                                                                                                                                                                                                                ". , t'.

t M. !* .i. *

l. .l , .. . . . I,1.! 1i,: ... . ,l . .,li..

                                                                                                                                                                                                 .               t.:'

_ . :}1.*! l11"1

                                                                                                                                                                                                                    ...        .                         "..       :... i.- t ! ! 4. :.       .: .                               .     ,h,7  ,! *.. 01 1 j :.            d. '.

Stepcounter Reading FIGURE 2 Comparison of Bank and Individual RPI Readings Control Bank D DW D

OVf q $'

                                                                                                                                                                                                                                                                                                                                                                                                 ~
                                                                                                                                                                                                                                                                     'Wbf                                               oJ                      J0d                                            o

f 9 l W'ie) j . , ',Ljl: 4TJu', Hl;L \ !)!, < ,

3. ill \ 0l w , !

                                                                                                                                                                                                                                                             0L(i]l:ijll
                                                                                                                                                                                                                                                                                            't
                                                                                                                                                                                                                                                                                                     ;_, ,1i lf Calibrated at 20 and 210 steps T- .                                                ..

1 1 i .

                                                                                   '                       j                  .l-                                                                    ,                                                                                                                -g,
                                                                                                                                    . . . L_w                                                                           _ . ' . . _ . :1 . , .                                  ..l..                    ,.3 )             '-

lh __. L . l 1

                                                                                                                                                           .L -                          l                 _ , . _ _

i

.g.

i ,

.1.

i i i e

                                                                                                                                                                                                                                                                                          , /. /
                                                                                                                                                                                                                                                                                                 /   .. .

_jh. . -

                                                                                                                                                                                                                 '.                ._                  .-h..__..                                      ..

I i l ..,.

                                                                                                                                 .                  i t

i.. J, ,. 1- 5/ - _g i I l '

                                                                                                          . _ _ L _..____._. '

j

                                                                                                                                                                                                                                                             /[                  '                          '
                                                                    ;                                                                                                                                                                            p                 . p 4
                                                                                            -j i                      I           i        !                                            -

1.....

                                                                                                                                                                                                                                       ,4  $-        ,

e_7[il :. ., 2

      .}gg.            ._ l                                                                                                                                     ! __. __                                            . . f'
                                                                                                                                    ... l       .,.

l. j . 4/c [ f.. I l

                                                                                                                                 !- ly                                                                   t.y , *

n. !

r t ,- ' a . r L. _

                                                                                                          !                                         i           :                      i o                             .                                                            1 t,

l-

                                                                                                                                                                                              , . .                                                             ,                                           i g                                               .
                                                                     ,                     .l._._..                  l .jl .                                ..
                                                                                                                                                                             ._ . ./     8. 11                    ,             .. .           .

g c 2, 3 w . >J .

  ,   _/yo.               ._L . L . . . .                                              _ _ L_._:, . . _.                                            '          l
                                                                                                                                                               ;          7_ ..p ,, .; /

O l l l -l / *' _. A a a . . .__ .r ._ j ' '

l. h MI.

I I I d: / . 'h.['.j,[_'}l. . jgQ. -_...-_-___.T ~~ 5 ~ ~ ~ ~ ~ ~ ~ ~ * ~Lk ' ' ~ ~ ~~ l ^ ^ ~

 .e  i. .

i

                                                                                                                          . . .        jy_ ./. .                     '

l , , o '

                                                                                                                                        '. ' i .        's M

l ,

l. - l' ' i

                                                                                                                                                                                      '            l          l                           l                   ,

fpp _ _ _ . ,

                                                                                                                                     /
                                                                                                                                    'j j'

i _.2 . . . _ . l 1

              ' _..                           ._..,                                                                           /.s._                                                                                                    .j.

g . } ._ - _ .. y _$p. _ . . _. .. _.._Z._[ '.__jl. L__i _ j __ . i

 'O e                                     .,             l                             /;/i /'                                           :

i

                                        .t                                                                                                                    1                                                                                               1 s
                 .   ..                                            i

_ g,/

                                                                                                 . . /.. ..p,. . .             i l-l

_.gD. .. '_.__. . X-- ' _..- l . . . _ - _ _ _ _

                                                                                                                                                                                                                                     . f _._ .                ..                    '__.                  '
                                                                                . j. .
                                                                                                  /                                     ;

l .. l

                                                             '/L:;/                                     !

l l , ., .l _ .p._ - . .

                                            . , , pt ./ _

i i l , 4 .i .. _ , I l

                                                 .-            si                                       ,

i ; , _.go.

                        .y..               W._%l               .!                        - g . . - . ; _. .                   1._ . . _ . . __                    . _ _ _ . _              .                           . . ._ . J                   .
                                   .-                                                      a t
                                                                                                                   .,'            . i.                                               l - .t. . _ ,                                       i

1. _

                        .-            d                i                                                                      l                                                      '          -

l , l l l i l , 1 i O O A k i.I N ;. & 2 M W 9 '.\ 8 ' f f t E M

B
T M * * *'*

Stepcounter Reading FIGURE 3 Comparison of Bank and Individual RPI Readings Control Bank A, Group 1

Calibrated at 20 and 210 steps up " :.in :n.

                 .:.: ::j::                .:: m-
                                                                                               .o          n:

a: nn.f::' .ni:n:.u: pt *u in tut in :u utj ';tt+ n w..tj;; t w;. j:: u u"-.. ~i t+! *** --**

                                                                                .,                                                     ,                                             l}n ut.} :n                                                .      :n-                  n:1                   : 1. c                 ::[p:
                                                                                                                                                                                                                                                                                                                            ..          h:n:
                              "! !   '-~'"i                                  ,                                 ,                                               .
                                                                                                                                                                                                                     -o.j.r.
                       g'.                                                                                                                                                                                                                               *                                                                                                                                                     . ,
                                                     .' : :'1:. f:                                                            ,                                                                                      W;                                                     ![. .;-

6 I' j .! ! j .; .t :

l ' .' .'

                                                                                                                                                                                                                                                                                                       .                         .,.                       .g:
                                                                                                                                                                                                                                                                                                                                                                .                        i
                                                                                                                                                                                                                                                                                                                                                                                                                               . h( -

j u:l: ':.. '-

                                                                                                                                                                                             .j;t i                              l'                                                       .-                 tu.                                                                                       .                                             i                          ,                                                                I                               is

t *

                                                                                                                                                                                                   . -- . :1:                                          .

t- :l--'

                                                                                                                                                                                                                                                                                                                                 . .                          ;~            . .

9: :;.!.,. !1. : ; t',. l.

                                                                                                                                                                                                                                                                                                                              , j '.

g'. .:

                                                                                                                                                                                     ! 5. !. .     !!!
                                                                                                                                                                                                                       ,                                                         ..                ' j ;. .f!              . .
                                                                                                                                                                                                                                                                                                                                                                            ":f.   .

A_._.

                                                                                                                             .-                                                      M;                             :lt:p .:'                                                                                                                                                                                   gb -
                                                                                                                                             .. .                    11                                       .                                                                    .     ,;n                                                                'l:           : /l.

n ' . .a}: ..

                                                                                                           'n'-.                             :::                     1:;,;:

c

. :(--~ :n'l::.~ T : /..!..

fiIt.. ,: ';l.'

                                                                                                                                                                                                                                                      ---f~!
                                                                                                                                                                                                                                                      . ! .: l .,-.                                       :.j
                                                                                                                                                                                                                                                                                                                         . .l:'                            . /.yf .l..,--

g t:

                                                   .      .                          ; l-                             ,                                 .
                                                                                                                                                                                                                                                                                                                                 ...                      :l..
                                                                                                                                                                                                                                                                                                                                                         .g.

/ .:;.:.

u. i.

                                                                                                           .i.
                                                                                                                                                        ,,          nu                                                                     ..i a       :n ; -                              n :t                       *

f- j..

. ! :. ?.!.-

                    ..                         :                                                                            ;               n                       ,--                                                                       -
                                                                                                                                                                                                                                                                   ;fa.                                                  n :-               .y .I                            -                                 '             ...
                                                                                     .k' '~-                              -~~
                                                                                                                                                                                                                                                                   ,i.
                                                                                                                                                                                                                                                                                         - - -:l: .                                 ... X u!-                                                                                                                                                                            .,

t " i:;: ;, !. n. ,:n "Q'., ..

                                                                                                                                                                    .                                                                                             :. p.                                                    . . e..m / 4                  . , .. . .
                                                                                                                                                                                                                                                                                                                                                                                  .l.      .

m a _

                -'l'                          !                 ,'                                                         i,.;             _..;                    "j' df 2, ','          :"                                                                                 _!),%,j

-- ,.' l I'

                                                                                                                                                                                                                                                    ~~                    -

o. .j1. t

                                                          . . ,                                                                             ..i                     u ., ,

gg na a: i. i. a:

                                                                                                                                               ~                                                                                                                                                                                                                                                                         ,

3

                                                                                        .                                                                                                                                                                                                             d. m -

l: - 1- m i gg -

                    - 1:@ R- n .:
                                                                                                                 .        F                .(j                     F. y! ;n. j                                                                                   ;jj. ; +e:g . % ._ _ _j } 7                                                                                                                             i.
       $                                     I n:                         l U
                                                                                                                                                                                                  "2                    '
                                                                                                                                                                                                                                                                      .N..                            .r. '
                                                                                                                                                                                                                                                                                                                               !b                       h                                                               _l

[ '7 ~

                                                                'g       i. ,
                                                                                                                                                                                                                   ,'. .                                                                    .a.                                                                             ~~7'--~

g,,~ *g I

                                                                                                                                                                                                                                                                                                                               ;g:..' ' ' :~..

w .. ' . l4 ,l' . ;i!. f;.) .g *[. :l

                                                                                                                                                                                        ..        f...* j .             ,;,;                      pr .                                     * ** :                                                                             'l-
                                                                                                                                                                                                                                                                                                                                                                                                   ,g                  y.
                                                                                                                                                                                                                                                                                                                                       .t.

O ' ,' ' '

                                                            .                 ..                                                                                  l '. .                ;         t;               !.                I A                                     !,!                               '                                         '

f rf

                                                                                                                                                                                                                                                                        ,s                     .. ...                                         ]                                 .,.                     }
                          '3
                                                                                                                                                                                                     .i.           1:                                            : 'i-'                        :l                                             j. .f                                                                                  !
      "O O
            -j    ,
                                                 ;       ' .'                    '      [               :!-

l

                                                                                                                                              .                                                   i;i.
                                                                                                                                                                                                  ^;; [.::
                                                                                                                                                                                                                                          ,:l:, j :      . 21 : ! ! '

d:,.' t

f !* 'l 4

M

                                      , :.:.;,              ' , ' .i:                                                                                                                                                                                                                                                                         ;
                                                                                                        ~~

7 q,f"...p,. .--- ,,]? j. l-

~~-

j --- l :- t 1 , - 1M g.

     -                                                                                 l                                                                          ,

s ! -*-~:1. ,. - +- -l ,

     'O
     *       $f'5::                                            !!                                                  !                                     I                                                                                                                                                                           '

I _I

       >   ~. 1:1. ".-- ~.1,
                                                       ~+
                                                           ." --~;*~-                                 +-+. ;-                            .

e e

                                                                                                                                                                                                                                                                                                                                                                              .1.
                                                                                                                                                  .: t. ,g
                                                                                                                                                                                                                                                                                               .i,                            ,1, 4G    9                          .n.                          '

n . d ,14 :: *-

                                                                                                                                                                                                                                                                                         - -                               ~ .:             i
                                                                                                                                                                                                                                                                                                                                                         .-                   . l'-

l

                                        ...             g.                           I'                                                  ./j g.                                                    li: . . , j ll ;

H -;!.

             .              ,1' i..
                                                                                                       't'.            ...:             /:'l                                '          '
                                                                                                                                                                                         /{!!:                        ^.:                         -
                                                                                                                                                                                                                                                                                                  '                                         ,         .                           l
           +p +~ ~~

t . ..

                                                                                                                                                                                                                                                                                                                                                    ' ' .l ..: .--h'                      . .-*---.'9---            !
                                                                       ""~~                                                              ~~'                     ~                '-~'+*~                                                -
                                                                                                      -!*; t-                                                                                                                                     ~;-* ;                                                             ---

n n. n' I p!"T y, ; l-

l, :. _ - - -

lu 7. :,: g't

g

g. .

a. . ,.u. p i. >.

                                                                                                                                                                                                                             , .                      : u. l :. . .
                                                                                                                                                                                                                                                      .                        .                                                                                              1, pL i!~ iii                       *
                                                                       .4_..-
                                                                                     . ! p/;                 :_           _d-i:                      :
                                                                                                                                                                                          -q!!F        -

il ' n :ul i i ! _ 2_ _: 4_ .. __._ :__. - l Ih-}' _l /

                                                          ;i.
                                                                                ~ !~ ;

[ ! :. q i j ., , ! ; n-

            ; , , 'li o .
                                     . .'_' ny. : A:: y./ ./

V. .nl..

1.

1 1

l

                                                                                                                                                                                                                                                                                                                                                     .j,-           !           r f                               I
           -+-
            ,..l                             '

f, . ,p,.- p-n

                                                                                                                                         'nj.-                                        > j u, n:
                                                                                                                                                                                                                                                                                                                               ,                . q . _.. . . . . q _ _.                                          7. .; .

(, p-

                                                                                                                                                                                                                                                                                                '-                                                   q                          l ug'g_                                                                                             -

1

                                                                                                                                                                                                                                                                                                                             - l-

i;:; -

            ! -                      A:/

ml

                                      .; .-4                    :

n; n

                     .      . . ,                                                 .t.           .       ..

p. 1. .. ._. . _ . . _ . _ . _ l. ;I- 1 .I h,. .l; .# ,

                                                                                  't                                 1 il:                                                ,                                                           l
                                                                                                                                                                                                                                                                                                                                                     .j                                                       :l.

g

           }lll
           ++* t                                       . - -                           -    h- %N iM.! JNPl!l/.iR!M,k ;I4 db MWA!IM  t-                           .i                                  - .. ... ...                                                          .. _ . ,                                                                          .                                                  i Stepcounter Reading FIGURE 4 Comparison of Bank and Individual RPI Readings Control Bank A, Group 2

Exhibit B Prairie Island Nuclear Generating Plant License Amendment Request dated February 20, 1980 Docket Nos. 50-282 License Nos. DPR-42 50-306 DPR-60 Exhibit B consists of revised pages of the Prairie Island Nuclear Generating Plant. Technical Specifications, Appendix A, as listed below: Page (TS- ) 3.10-5

TS.3.10-5 REV E. Rod Misalignment Limitations

1. If a full-length or part-length rod cluster control (RCC) assembly is misaligned from its bank as described in 3.10.E.2, the rod will l be realigned or the core power peaking factors shall be decermined within 2 hours, and Specification 3.10.B applied. If peaking factors are not determined within 2 hours, the high neugron flux trip setpoint shall be reduced to 85 percent of rating.

2. (a) If the bank demand position is greater than or equal to 215 steps, or less than or equal to 30 steps and the rod position indicator channel differs by more than 24 steps, that rod control cluster assembly (RCCA) shall be considered misaligned.

(b) If the bank demand position is between 30 and 215 steps and the rod position indicator channel differs by more than 12 steps, that RCCA shall be considered misaligned.

3. If the misaligned rod cluster control is not realigned within a total of 8 hours, the rod shall be declared inoperable.

F. Inoperable Rod Position Indicator Channels

1. If a rod position indicator (RPI) channel is out of service then (a) For operation between 50% and 100% of rating, the position of the RCC shall be checked directly by core instrumentation (excore detector and/or thermocouples and/or movable incore detectors) every shift or subsequent to rod motion exceeding a total of 24 steps, whichever occurs first.

(b) During operation below 50% of rating, no special monitoring is required.

2. The plant shall be brought to the hot shutdown condition should more than one RPI channel per sub-bank or more than two RPI channels per bank be found to be inoperable during power operation.

3. If a full length or part length rod having a rod position indicator channel out of service is found to be misaljgned from 1.a. above, then Specification 3.10 E. will be applied.

G. Inoperable Rod Limitations

1. An inoperable rod is a rod which (a) does not trip, (b) is declared inoperable under Specification 3.10 E. or 3.10 H. or (c) cannot be moved by its drive mechanism and cannot be corrected within 8 hours.

See footnote 2, page TS.3.10-4. See footnote 2, page TS.3.10-4.}}

ML19290D632: Difference between revisions

Latest revision as of 01:32, 22 February 2020

Text

Navigation menu

ML19290D632: Difference between revisions

Latest revision as of 01:32, 22 February 2020

Text

Navigation menu

Search