View source for 2CAN068408, Unit Two Cycle Four Startup Rept, for Period Ending 840315

{{Adams
| number = ML20092L449
| issue date = 03/15/1984
| title = Unit Two Cycle Four Startup Rept, for Period Ending 840315
| author name = 
| author affiliation = ARKANSAS POWER &amp; LIGHT CO.
| addressee name = Miller J
| addressee affiliation = NRC OFFICE OF NUCLEAR REACTOR REGULATION (NRR)
| docket = 05000368
| license number = 
| contact person = 
| document report number = 2CAN068408, 2CAN68408, NUDOCS 8406290393
| document type = TECHNICAL SPECIFICATIONS &amp; TEST REPORTS, TEST REPORT
| page count = 35
}}

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I TABLE OF CONTENTS PAGE

==1.0  INTRODUCTION==
1 2.0   PRECRITICAL TEST SUMMARIES                                      2 2.1 CEA Trip Test                                                2
: 2. 2 Reactor Coolant Flow Coastdown                             2 3.0  LOW POWER PHYSICS TEST SUMMARIES                                3 3.1 Determination of Critical Boron Concentration               3 3.2 CEA Symmetry Test                                           3 3.3 Temperature Reactivity Coefficient                          4 3.4 Regulating CEA Group Reactivity Worth                       7
: 3. 5 Individual Control Element Assembly (CEA) 6-1 Reactivity   9 Worth 3.6 Sequential Regulating Groups Reactivity Worth               9 4.0  POWER ESCALATION TEST SUMMARIES                                 9 4.1 Reactor Coolant Flow at 50% and 100% Full Power             9 4.2 Core Power Distribution at 50% and 100% Full Power         12 4.3 Shape Annealing Matrix (SAM) and Boundary Point Power      23 Correlation (BPPC) Verification at 50% Full Power 4.4 Radial Peaking Factor and CEA Shadowing Factor             25 Verification at 50% Full Power 4.5 Reactivity Coefficients at 50% and 100% Full Power        28

==5.0  CONCLUSION==
31

   ), ,
LIST OF TABLES AND FIGURES PAGE Table 3.3-1             Isothermal Temperature Coefficient Measurement                                                    6 Table 3.4-1          - Regulating CEA Group Worths                                                                        8 Table 4.2-1             Core Power. Distribution at 50% Full Power                                                  12 Fig. 4.2-1(a) Radial Power Distributinn at 50% Full                                                                13-16 4.2-1(d) Power Table 4.2-2         - Core Power Distribution at 100% Full Power                                                    17 Fig.-4.2-2(a) Radial Power Distribution at 100% Full                                                               18-21
             .4.2-2(d) Power Table 4.3-1            Shape Annealing Matrix (SAM) and Boundary Point                                              23 Power Correlation Coefficients
        -Table 4.4-1            Radial Peaking Factors                                                                       25 1 Table 4.4-2          CEA Shadowing Factors                                                                         26 Table 4.5-1           Reactivity Coefficients at 50% and 100% Full Power-                                           29 b
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==1.0 INTRODUCTION==
Post fuel load startup testing of Arkansas Nuclear One, Unit 2 commenced January 24, 1984, with the performance of precritical tests. Low power physics testing began on January 25, 1984. On this date at 1813 hours Cycle 4. initial criticality was achieved. Low power physics testing proceeded to completion at 0733 hours on January 29, 1984, at which time power ascension testing commenced. The first power ascension test plateau (50% full power) was attained on February 6, 1984. Following completion of testing at 50% full power on February 20, 1984, reactor power was raised to 100% full power and testing continued. The power escalation test program was completed on March 15, 1984.
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PAGE 1 6
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* l;.,' # ' ~2                 ,
12.0- PRECRITICAL' TEST SUMMARIES                                                          !
2.1_ CEA Trip Test                                                             -    !
i 2.~ 1.1    Purpose                                                            ,
The CEA trip test was performed to verify that the elapsed         :
t!me between initiation of a CEA trip and 90%' insertion of the CEA was 5 3.0 seconds.                                         l 2.1.2    ~ Test Method                                                        f
                                                                                                                                +
Initial reactor coolant system conditions were established         I with Tavg 2 525*F and four reactor coolant pumps operating.        '
                                                            .One CEA group.was then fully withdrawn. As each CEA in             y that group was dropped (by removing electrical power from
* the drive mechanism), the elapsed time between initiation of the trip and 90% insertion of the CEA was recorded.
                                         .                 'After completing drop time testing on one CEA group, the next CEA group was tested. Drop time testing proceeded in this manner until all designated CEAs had been tested.             j 2.1. 3 . Results and Evaluation                                             !
l The measured' individual full length CEA drop times from a         !
fully withdrawn position to 90% insertion were < 3.0               i seconds.                                                           .
2i2 Reactor Coolant Flow Coastdown                                                  !
2.2.1      Purpose
                                                                                                                               '[
                                                        ~
The reactor coolant flow coastdown test was performed to           I verify the response time of Channel C core protection              ;
calculator to a two out of four reactor coolant pump trip          !
                                                           =and flow coastdown.                                                 !
i 2.2.2      Test Method                                                        ;
e Initial reactor-coolant system conditions were established with four reactor coolant pumps running. Recording                 :
instrumentation was connected to the status contacts of two        ;
separate-loop RCP motor power supply breakers and CEDM coil        ,
monitors. With appropriate test software loaded in CPC             i Channel C, the two reactor coolant pumps were tripped              ,
simultaneously. The elapsed time between initiation of the         !
pump. trip and receipt of a low DNBR trip from the core            !
protection calculator was measured.                                 ;
PAGE 2

2.2.3     Results and Evaluation The measured response time of CPC Channel C to a two pump
                       -loss of flow transient was less than the maximum allowable response time of 0.80 seconds.
3.0 LOW POWER PHYSICS TEST SUMMARIES 3.1 Determination of Critical Boron Concentration 3.1.1     Purpose The reactor coolant system boron concentration required to maintain criticality of the reactor at the beginning of Cycle 4 under hot zero power xenon-free conditions was measured. The results of this measurement were compared to predictions to verify design, fabrication and proper loading of the core.
3.1.2    Test Method Criticality of the reactor was obtained by deboration of the reactor coolant system at a constant charging rate.
All CEAs were fully withdrawn prior to deborating the RCS with the exception of regulating group 6 which was 75" withdrawn. Once criticality was achieved, the dilution was terminated and the RCS boron concentration allowed to equilibrate.. The critical boron concentration was calculated by correcting the measured equilibrium boron concentration for deviation of CEA position from the reference (AR0) CEA position and compared to the predicted critical ARO boron concentration.
3.1. 3   Results and Evaluation The measured critical boron concentration of 1613 ppm agreed well with the predicted value of 1617. Acceptance criteria state that the measured critical boron concentration shall be within 100 ppm of the predicted critical boron concentration.
3.2 CEA Symmetry Test
: 3. 2.1 - Purpose A CEA symmetry test was performed to verify that all CEAs were coupled to their extension shafts and to demonstrate that the core was loaded properly.
PAGE 3 L

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1 3.2.2   Test Method The symmetry checks were performed by inserting the reference CEA of a group to its lower electrical limit and compensating for the reactivity change by withdrawing CEA regulating group 6. Symmetric CEAs in the group were subsequently traded with each other and the reactivity         ;
deviation from the reference CEA measured. The reference CEA was finally traded for the last symmetric CEA in the group to measure reactivity drift. CEA coupling was verified by noting a change in reactivity when a CEA was inserted.
1 3.2.3   Results and Evaluation The absolute value of adjusted reactivity deviation for all     '
CEAs from their respective references was less than the         j maximum acceptable value of 1.5 cents. All CEAs were verified to be coupled.
3.3 Temperature Reactivity Coefficient 3.3.1   Purpose The isothermal temperature coefficient (ITC) measurement was performed during low power physics testing to verify conformance with Technical Specifications on the moderator temperature coefficient (MTC). Compariso, of the measured ITC to predictions was also performed to demonstrate proper design and fabrication of the core.
3.3.2   Test Method The isothermal temperature coefficient was measured at two CEA configurations: essentially all rods out (CEA group 6
                    > 130" withdrawn) and the zero power insertion limit.
At the specified CEA configuration, the test was initiated by decreasing average reactor coolant temperature by approximately 10*F and then increasing the temperature to its initial value. During the change in temperature, reactivity feedback was compensated for by CEA regulating group movement. This compensation was required to maintain reactor power within the acceptable test range. The reactivity change associated with the change in RCS average temperature was obtained from the reactivity computer and used to calculate the ITC.
After the ITC had been measured, a predicted value of the fuel temperature coefficient was subtracted from the ITC to obtain the MTC.
PAGE 4

3.3.3   . Results and ' Evaluation Table 3.3-1 tabulates the results of the temperature reactivity coefficient measurement.
All applicable acceptance criteria were met.
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       ,       -1                                                                                     I
              , l-                                       TABLE 3.3-1                                  l
               .I-                                                                                    l l                 ISOTHERMAL TEMPERATURE C0 EFFICIENT MEASUREMINT                    l l                                                                                    l
              -- I            .I           I                       l                    l             l l-           :l         'l        MEASURED        l     PREDICTED      l ACCEPTANCE  l   1 l            -l           l (x 10-4 Ak/k/ F)      l (x 10~4 Ak/k/*F)   l   CRITERIA  l   i
               'l              I
_              i I..           l                       .
l     ,
l   1. -ARO    l'. ITC-   l         +0.300         l       +0.42        l     (a)    l    ,
              -l               1.         I                       I                     l            l
              - I-            ~ I .MTC'   I         +0.450        l        +0.57        l     (b)    1
              -l                                                                                     l l                                                                                    l l   2. ZPIL   l 'ITC     l         +0.243        l        +0.27        l     (a) ,  I    4 l-             1          I                       1                     l            l l              l MTC      l         +0.403       .l        +0.43        l     (b)    l    ;
              'l               l          I                       I                     I            l l                                                                                    l    .
t l NOTES:                                                                             l l                -
l r
              - l'(a) Measured value must'be within 1 0.3 x 10-4 Ak/k/*F of predicted value. l l-                                                                                   l l (b) _ Measured value plus measurement uncertainty must be less positive            l l'      than + 0.5 x 10-4 Ak/k/*F or the applicable Special Test Exception l
              ~l        must be invoked.                                                             l l                                                                                    l-PAGE 6 k.

3.4 Regulating CEA Group Reactivity Worth 3.4.1    Purpose The reactivity worths of the CEA regulating groups were measured to verify calculations of available shutdown margin. The results of this test were compared to vendor predictions of regulating group reactivity worth.
If sufficient agreement between prediction and measurement is demonstrated for the regulating CEA group reactivity worths, the reactivity worth. predictions for the shutdown CEA groups are deemed adequate.
Additionally, the measured values of regulating CEA reactivity worth can be utilized for reactivity balance calculations.
3.4.2    Test Method The-regulating group reactivity worths were measured at hot zero power conditions using the baron /CEA group swap method. A constant charging rate of DI water is initiated and maintained. During the dilution, CEA groups are individually inserted to compensate for the positive addition of reactivity. The worths of the CEA groups are then obtained from the reactivity computer.
.        3.4.3    Results and Evaluation Table 3.4-1 tabulates the results of the regulating CEA group reactivity worth measurement. All applicable acceptance criteria were met.
PAGE 7 L.

f-l                                                                            l 1                               TABLE 3.4-1                                  1
  ,     .I                                                                              1
,:- c   'l                         REGULATING CEA GROUP WORTHS                          I I                                                                            I O        MEASURED WORTH >    PREDICTED WORIH     ACCEPTANCE CRITERIA
             = NUMBER.       (%Ak/k)              (%Ak/k)               (%Ak/k) l                                                                            1 1     -6      I       0.45        l       o.50        I      i o.10          1 l                                                                            i I                                                                            I l      5      I       o.42        I       o.39       l       1 0.10          l 1                                                                            I I                                                                            I l-      4      I       o.38       1        0.33       l          o.10         1
         )                                 i                                           I l-                                I                                           l' I      ~3     l      - 0.51-      I        o.50       I          o.10      . 1 I                                                                            I I                                                                 -
1
       -l_       2     I       o.53        I        o.57       1          0.10        1 1                                                                            I
< --     1                                                                            I L        I       1     1        1.03       1        1.00       I       i o.15         I I                                                                            I I                                                                            I I   TOTAL     1      -3.32        1        3.34       1       1 0.33         I I             I                   i                   1                      I PAGE 8

(;
13.5 -Individual Control Element Assembly (CEA) 6-1 Reactivity Worth
:3.5.1       Purpose This test was performed for information only. The results were utilized in the 50% power ITC/MTC measurement.
3.5.2       Test Method CEA 6-1 reactivity worth was measured at hot zero power using the reactivity computer. Reactivity changes were measured and correlated with CEA 6-1 positions during both insertion and withdrawal of CEA 6-1.
3.5.3       Results and Evaluation
                           .This measurement was made for information only. Hence, no quantitative acceptance criteria were applied.
3.6 Sequential Regulating Groups Reactivity Worth 3.6.1       Purpose This test was performed for information only.
3.6.2       Test Method Sequential reactivity worth was measured at hot zero power from the zero power dependent insertion limit to all rods out. A constant boration rate was maintained
                          -until group 6 was approximately 130" withdrawn. The boration was then stopped and an incremental pull made
                           .to determine worth of group 6 from 130" to all rods out.
3.6.3       Results and Evaluation This measurement was made for information only. Hence, no quantitative acceptance criteria were applied.
4.0 POWER ESCALATION TEST SUMMARIES 4.1 Reactor Coolant Flow at 50% and 100% Full Power 4.1.1       Purpose Measurement of reactor coolant flow was carried out at 50% and 100% full power utilizing calorimetric methods.
The results were used to verify the conservatism of the Core Operating Limit Supervisory System (COLSS) and the Core Protection Calculator (CPC) measurements of reactor coolant flow.
PAGE 9 L

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                 .4.1.2'  Test Method A calorimetric measurement of reactor coolant flow was
                         -performed at steady state conditions. After establishing initial conditions for test performance, reactor coolant AT, primary system pressure, and seconuary caloritt.c.tric pwcr were racorded Ti.. Ocsse parameters, RCS mass flow was computed from the-following:
[n=Q/Ah where Q = Secondary calorimetric power (BTU /hr)
Ah = hg -hC = difference between hot leg and cold leg specific enthalpy (BTU /lb,)
m = RCS mass flowrate (1b,/hr)
The calorimetric RCS mass flow was then compared to COLSS-RCS mass flow and appropriate adjustments to COLSS c
flow constants were made. CPC RCS mass flow was next compared to COLSS RCS mass flow. Adjustments to the
                         ' appropriate CPC constants were made to_ maintain the CPC value of RCS flow conservative with respect to the COLSS value of RCS flow.
4.1.3   Results and Evaluation Acceptance criteria applied to this test at 50% and 100%
full power state that'for COLSS operable, measured RCS flow must'be greater than COLSS calculated RCS flow which in turn must be greater than CPC calculated RCS flow. Measured flows at 50% and 100% were 108.11% and 113.77% of design mass flow respectively. Applicable acceptance criteria were met at 50% and 100% full power.
4.2 Core Power Distribution at 50% and 100% Full Power 4.2.1   Purpose Steady state core power distribution was reasured at 50%
and 100% full power to verify core nuclear and thermal-hydraulic calculational models, thereby justifying use of these models'for performing the cycle 4 safety analysis. This test also serves to verify acceptable operating conditions at each test plateau.
PAGE 10

      ~'..
4.2.2 Test Method Steady state reactor power was established at the
* appropriate test plateau with equilibrium xenon. Incore detector data was then collected and analyzed using an incore analysis computer code. Specified power distribution parameters were obtained from the code and compared to predictions to verify the acceptability of the measured power distribution.
4.2.3 Results and Evaluation Tables 4.2-1 and 4.2-2 tabulate the results of the core power distribution tests. Figures 4.2-1-and 4.2-2 depict the measured radial power distributions at 50%
and 100% full power. All applicable acceptance criteria for this test were met.
s.
PAGE 11 L-u

m l                                            TABLE 4.2-1                                l I                                   .                                                   l
            -- l                            CORE POWER DISTRIBUTION AT 50% FULL POWER                  l l'                                                                                      l
            'l                          l              l            l           l
            'l      !
PARAMETER-        l MEASURED l PREDICTED l DIFFERENCE l ACCEPTAN                 l l                                                                                       l l RMS(I)-(axial)               3.11          --          --
5 5.000 RMS II) (radial) 3.68          --          --
1     5 5.000          l )
: l.        7 -(2)-                                                l                      l l-          xy                 1.6092        1.53      +0.0792         i 0.15           l l
7- (3)                                                                        l l            r                  1.5350    '
1.51      +0.025          i 0.15           l l
l 7z (4).              1.2347        1.26      -0.0253         1 0.13 l
l l
7    (5)                                                                      l l            Q           ~l     1.8773   l    1.90   l  -0.0227   l       0.19           l l                                                                                        l n
2                                                    l ll (3) RMS = [ I (100hg ) /n] j2-      t L                     <
l
            -- l              1=m.                                                                     l
            -l                                                                                         l l        where h = difference between the predicted and measured relative               l 1
                                            ~
th power density-for the i           axial or radial node.
            -l.         m,n = 1,101 for the axial distribution                                         l 1               .
l l         m,n = 1,177 for the radial distribution                                        l (2) F      = Planar radial-peaking factor                                          _
l (3) F r      = Integrated planar radial peaking factor                                 l
                    )F       = Core average axial peaking factor                                       l (5) Fq = Three dimensional power peaking factor
            'l (6) Additional review criteria requires that for each assembly with a                   l l         predicted relative power density B 0.9, the measured relative power            l l         density (RPD) must agree with the predicted RPD to within i 10% of the         l
            -l          predicted value. For each assembly with a predicted RPD < 0.9, the             l l         measured RPD must agree with the predicted RPD to within i 15% of the          l
            .l-       ' predicted value.                                                               l l                                                                                        l PAGE 12

(_-
y, FIGURE 4.2-1 (a)
   ;+        .
                                             ' RADIAL POWER DISTRIBUTION AT 50% FULL POWER
      ~
A                B~          C            D            E          F         G
                                                                                               'l          l         l l  .564 l     .814 l.
1                                                                          l  .5934l     .8559l l 5.21 1    5.15 l l
                                                                    'l              l                                l l      .809 l     1.060 l     .713 l     .894 l 2~                                              l      .7862l     1.0540l     .7533l     .9752l
          .                                                           l. -2.82      l     .57 l    5.65 l    9.08 l l
l                                                          l l     .876 l      1.200 l      1.310 1    1.070 l   1.260 l 3'                                 l     .8344l      1.15691      1.2798l    1.09331   1.3240l l  -4.75    l    -3.59    l  -2.31     l  2.23  -l  5.08 l r .
l l                                                                        l l       .808 l1 1.200 l         1.010 l      1.360 l    1.280 l    .997 l
                   ~4' -
l       .7629l. 1.1427l        .98311     1.3059l    1.28791   1.0660l l    -5.58 l -4.77 l           -2.66    l  -3.98     l   .62 -l   6.92 l l                                                                        l
                                         -l                                                                         l l     1.060 l      1.310-l      1.360 l        .953 l   1.010 l   1.250 l 5                    l     1.0030l      1.25121      1.31321        .9517l   1.0244l   1.2703l l    -5.38    l  -4.49    l ' -3.44     l      .14 l    1.43 l    1.62 l l-l                                                                                      l l     .564 l          .712 l     1.070.l      1.280 l      1.010 l     .956 l    .969 l 6   -l       .5559l          .7088l     1.0512l      1.2493l        .9956l    .9643l    .9650l l  -1.44      l'       .45' l   -1.76    l    -2.40    l  -1.43     l   .87   l   .41 l
          ,.              ll                                                                                        l l          .                                                                            l
                          'l-      .813 l         .894 l     -1.260 l        .997 l. 1.250 l     .969 l   1.100 l 7: 'l        .7995l          .8940l     1.2476l        .9991l    '1.2344l     .9777l   1.1035l
                          .l   -1,66-     l-      .00 l~       .98   l       .21 'l   -1.25 l       .90 l.    .32 l
                          -l-             l-             l           l             l            l         l         l
                          'l              l                                                                   l l   'x'.xxx l Predicted                                                      NW   I l    y.yyy-l Measured
                          -l     z.zzz l Percent Difference
                           'l             l                                                                   l l
PAGE 13

f:L g-,
FIGURE 4.2-1 (b)
RADIAL POWER DISTRIBUTION AT 50% FULL POWER
                  -N'           J             K           L          M          N          P'        R
       .l               -
l       . l            1
        -l.        .905 l        .813 l~      .564 l l _ .9431l              8497l       .58761                                                          1 l' 4.21
             .             l '4.51      l     4.18 l
       ~l l                                                     l          l l '1.070'l            .894'l        .712 l -1.060 l        .808 l l  '1.1369l
                                .9632l        .7444l     1.0399l     .7746l                                   2 l~6.25.-l             7.74 l       4.55 ~l -1.90 l -4.13          l
        -l
: l.           .
l-l         .790.l .1.260 l           1.070 l     1.310 l. 1.200 l       .876 l l . .85381 .1.31431                 1.08341     1.2635l -1.1385l       .8149l                        3 l       8 .08    l    4.31    l  ~
1.25 .l   -3.55    l -5.12    l -6.97    l l-                                                                !
       .l                                                                  l                       l l         .780 l       .997 l~ 1.280 l          1.360 l '1.010 l      1.200 l     .809 l
        .l         .8453l      1.0598l 1.2784l           1.2907l     .9686l    1.1078l     .7  il             4 l       8.37 l      6.30      l      .13   1 -5.10     l -4.10    l -7.68    l -7.73      l l                           -l                                                            l l                             l                                                           l
       .l          .739 l      1;250 l       1.010 l      .953 l    1.360 l    1.310 l    1.060 l
       -l:         .7822l      1.2694l       1.0232l      .9499l 1.30491       1.2369l     .9919l             5 l 5.85           l    1.55 l        1.31   l     .33 l -4.05. l     -5.58   l -6.'42      l l
       'l                                                                                                  l l-        .881 l       .969 l        .956 l 1.010 l        1.280 l    1.070 l     .713 l    .564 l l         .9008l       .9703l        .9705l. 1.0084l       1.2537l    1.0505l     .7096l    .5606l   6
       .l -2.25.          l     .13 l        1.52   l     .16  l -2.05     l -1.82   l     .48 l     .60 l l                                                                 l                              l l          .                                                      1                              I
       -l          .929 l. 1.100 l-           .969 l     1.250 l     .997 l .1.260 l       .894 l    .814 l l         .9475l      1.1106l        .98691     1.2496l    1.00881    1.2598l     .9045l    .8108l   7
       -l 1.99 l-               .96 l        1.85: l      .03 l     1.18   l    .02 l     1.17 l     .39  l l-               l-           l            l          l           l         l            l       l l-           l                                                               l l x.xxx l Predicted                                                          l  NE.
l y.yyy l Measured l    z.zzz l Percent Difference l            l                                                               l l
PAGE 14

FIGURE 4.2-1 (c)
RADIAL POWER DISTRIBUTION AT 50% FULL POWER l           l            l          l           1           I          l          l l      .905 l      1.070 l     .790 l      .780 l      .739 l     .881 l    .929 l 8   l      .8967l     1.0802l      .8145l      .8040l      .7565l     .8939l    .92711 l      .92 l        .95 l    3.10 l     3.08 l      2.37 l       1.46 l     .20    l l                                                l           l                     l l                                                l           l                     l l      .814 l       .894 l   1.260 l       .997 l   1.250 l       .969 l  1.100 l 9~ l       .8223l       .9445l   1.2773l     1.0083l     1.2361l      .9771l  1.1023l l    1.02 l       5.65 l     1.37    l   1.13 l    -1.11 l        .84 l     .21   l l                                                                                 l l                                                                                 l l      .564 l       .713 l   1.070 l    1.280 l     1.010 l       .956 l    .969 l 10   l      .5724l       .7302l   1.0814l    1.2596l       .9923l      .9605l    .9649l l    1.49 l       2.41 l     1.07    l -1.59    l  -1.75    l     .47 l     .42 l l                                                                                 l l
l    1.060 l    1.310 l    1.360 l       .953 l    1.010 l   1.250 l 11               l     1.0129l    1.2582l    1.3119l       .9443l    1.0125l   1.25371 l   -4.44   l  -3.95 l    -3.54    l     .91   l     .25   l  .30 l l            l                                                        l l            l                                                        l l       .809 l   1.200 l    1.010 l     1.360 l     1.280 l    .997 l 12               l       .7615l   1.1290l      .9724l    1.2802l     1.2632l   1.0399l l    -5.87   l  -5.92   l  -3.72    l  -5.87    l  -1.31    l 4.30 l l                                                                     l l
l     .876 l   1.200 l     1.310 l     1.070 l   1.260 l 13                            l     .8238l   1.1416l     1.2592l     1.0716l   1.2932l l  -5.96   l  -4.87    l  -3.88    l     .15   l 2.63 l l~                                                       l l
l     .808 l    1.060 l       .712 l   .894 l 14                                       l     .7769l    1.0432l       .7352l   .9471l l  -3.85    l  -1.58    l   3.26 l    5.94 l l           l                                l l
l     .564 l   .813 l 15                                                               l     .5785l   .8343l l   2.57 l    2.62 l     l l          l         1 A            B          C           D           E          F         G l            l                                                              l l   x.xxx l Predicted                                                       l l y.yyy l Heasured l   z.zzz    l Percent Difference l            l                                                          SW  l         .
l         l PAGE 15

FIGURE 4.2-1 (d)
RADIAL POWER DISTRIBUTION AT 50% FULL POWER I            I                l                  l                                  l                   l                    l                                            l         l l    .718 l             .929 l           .881 l                               .739 l      .780 l              .790 l                                      1.070 l             .905 l l    .7401l             .938 l           .90541                               .7708l      .8168l              .8321l                                      1.0986l             .9147l   8 l 3.08 l                .97   l   2.77           l 4.30                             l   4.72 l            5.33               l                          2.67 l              1.07    l l                                                                                                                                                                                   l l                                                                                                                                                                                   l l    .929 l            1.100 l           .969'l                              1.250 l     .997 l             1.260 l                                                 .894 l    .813 l l    .9457l            1.090 l           .9886l                              1.2579l    1.0221l             1.2909l                                                 .9573l    .8475l 9 l   1.80 l              .82   l   2.02 l                                      .63 l     2.52 l              2.45 l                                      7.08 l              4.24    l l                                                                                                                                                                                   l l                                                                                                                                                                                   l l    .881 l             .969 l           .956 l                              1.010 l    1.280 l             1.070 l                                                 .712 l   .564 l
                                                -l    .8956l             .9642l           .9699l                              1.0183l    1.2727l             1.0775l                                                 .7450l   .6153l 10 l   1.66 l              .50 l     1.45 l                                      .82 l      .57            l    .70 l                                     4.63 l               9.10    l                              l l                                                                                                                                                                                   l                              '
l                                                                                                                                                                                                                  l l    .739 l            1.250 l    1.010 l                                     .953 l    1.360 l             1.310 l                                      1.060 l                                                   '
i    .7702l            1.25401    1.0174l                                     .9544l    1.3235l             1.2657l                                      1.0232l                      11 1 4.22 l                .32 l           .73 l                                 .15 l   -2.68*-l -3.38 l -3.47                                                             l                                         l l                                                                                                                                                                        l
: l.                                                                                                                                                                       l l    .780 l             .997 l    1.280 l                                    1.360 l    1.010 l             1.200 l                                                 .808 l l    .82831            1.03661    1.26541                                    1.2862l     .9774l             1.1340l                                                 .7670l            12                           j
,                                                l' 6.19      l         3.97   l -1.14           l -5.43                            l -3.23              l -5.50             l -5.07                                      l l                                                                                                                                                                        l l
l    .790 l            1.260 l    1.070 l                                    1.310 l    1.200 l              .876 l l    .83801            1.2933l    1.07221                                    1.2583l    1.14261              .8259l                                                                   13 l 6.08       l         2.64 l            .21 l              -3.95                  l -4.78              l -5.72             l l                                                                                                                           l l-l   1.070 l             .894 l          .713 l                               1.060 l     .809 l l   1.1136l             .95021          .7358l 1.0328l                                   .7734l                                                                                       14 l 4.07       l         6.29   l   3.20 l -2.57 l                                      -4.40             l l                                                                                  l                    l l
l    .905 l             .814 l          .564 l l    .9235l             .8358l          .5794l                                                                                                                                        15 l   2.04 l 2.68 'l                2.73 l l            l                l                l l
H                  J            K                                        L          M                   N                                                  P            H
!                                                             l                l                                                                                                                                                l j                                                             l         x.xxx l Predicted                                                                                                                                       l
;                                                             l y.yyy l Measured z.zzz l Percent Difference l
l                l                                                                                                                                                l   se l
l PAGE 16 l

l-                                                                            l l                                  TABLE 4.2-2                                l l                                                                             1      l l
l                  CORE POWR DISTRIBUTION AT 100% FULL POWER                  l l                                                                             l l                  l           l           l           l l    PARAMETER     l MEASURED l PREDICTED l DIFFERENCE l ACCEPTA              l l                 _l                                                          l      l RMS(I) (axial)       4.74        --           --           5 5.000          l l RMS(I) (radial)      3.20        --           --
5 5.000 l
7    (2)                                                               l l        xy            1.5778      1.5200    +0.0578           i .15          l l
7    (3)                                                               l l        r             1.5007      1.4900      0.0107          i .15          l l
7    (4)                                                               l l        z             1.1603      1.2200    -0.0597           i .12          l l
7    (5)                                                              l l        Q         l   1.7844 l    1.8100 l  -0.0256   l       1 .18         l l                                                                            l l Note: Superscripts refer to footnotes of Tabic 4.2-1                       l l                    ,                                                       _l PAGE 17
                                                                                    .--l

FIGURE 4.2-2 (a)
RADIAL POWER DISTRIBUTION AT 100% FULL POWER A             B          C          D         E         F         G l         l         l l   .557 l    .794 l 1                                                          l  .584 l     .844 l l 4.87    l 6.25    l l
l          l                              l l    .769 l   1.010 l    .710 l     .889 l 2                                     l    .754 l   1.004 l    .735 l     .958 l l -1.96 l       .63   l 3.51    l 7.79    l l
l                                                    l l    .835 l   1.150 l    1.260 l   1.060 l   1.250 l 3                          l    .800 l    1.113 l   1.236 l   1.071 l   1.311 l l -4.21    l -3.18. l   -1.92 l    1.08   l  4.86    l l                   l l                                            l                   l l      .769 l   1.150 l      .988 l   1.330 l   1.270 l   1.020 l 4             l      .736 l   1.088 l      .951 l   1.270 l   1.272 l   1.067 l l   -4.33 l    -5.43 l    -3.75 l    -4.52 l     .18   l  4.57   l l                                                                l l                                                                l l    1.010 l    1.260 l    1.330 l      .966 l  1.030 l   1.280 l 5             l      .979 l   1.216 l    1.289 l      .947 l  1.034 l   1.300 l l   -3.10 l    -3.45 l    -3.05 l    -1.96 l     .37   l  1.60   l l
l                                                                           l l   .556 l        .709 l   1.060 l    1.270 l    1.030 l   1.000 l   1.030 l 6  l   .558 l        .704 l   1.035 l    1.249 l    1.021 l    .999 l   1.021 l l   .32   l       .77  l  -2.33 l    -1.66 l      .85   l   .12   l   .90   l l                                                                           l l                                                                           l l  .793 l        .889 l    1.250 l    1.020 l    1.280 l   1.030 l   1.180 l 7  l  .805 l        .899 l    1.259 l    1.017 l    1.283 l   1.026 l   1.170 l l 1.51    l     1.13   l    .71   l     .25  l    .20   l   .42   l   .82   l l         l            l          l          l          l         l         l l         l                                                           l l x.xxx l Predicted                                              gy   l l y.yyy l Measured l z.zzz l Percent Difference I         l                                                           l l
4 PAGE 18

 %=; :                    .1                 - e
                       ~.
r FIGURE 4.2-2-(b)
RADIAL POWER DISTRIBUTION AT 100%' FULL POWER H            J             K          L          M         N         P          R                      l 1-      -      l            l             l                                                                   l
               - ^l        '878 l
                           .             .793 l       .556 l                                                                      I
                  -l       .929 l        .835'l      c.577 l                                                         l'           l l 5.82 l 5.34               l   3.71 -l.                                                                       l l                                                                                                             !
1:                                   -             l          l l   1.060 l          .889 l       .709'l 1.010 l        .769 l
                  < l-  1.119 l.         .942 l       .724 l     .984 l     .740 l                                   2            i l 5.61        l 5.96        l' 2.08 l -2.54 l -3.76 l                                                         !
                   !                                         l 1                                         I                              I                                     i
:1       .810 l      1.250 l.. 1.060 l        1.260 l    1.150 l    .835 l                                      l ll       .850 l     1.301 l -1.061-l- 1.218 l 'I.094 l              .780 l                         3            l
                  .l    4.93 l       4.11 -l          .05 l -3.33 l -4.86 .l -6.53          l                                     ,
,    r,            l~                                                                                                             !
                   !                                                                                  l
* l       .815 l     1.020 l       1.270 l 1.330 l         .988 l 1.150 l      .769 l e
m                  l       .854 l     1.066-l       1.264 l 1.256 l         .937 l 1.054 l      .720 l               4 l 4.731 ~l- 4.49             l . .45 l--5.58~ l -5.19 l -8.36 l -6.34 l 1                                                                        !       'l
:                -l                                                                         l-        l l       .787 l     1.280 l       1.030 l      .966 l 1.330 l      1.260 l- 1.010 l
                - 1.       .808 l     1.300 l       1.032 l      .944 l- 1.281 l     1.205 l . 969-l                 5 l    2.73      l   1.57      l    . 16 l -2.31      l -3.66- l -4.36 -l'-4.04     .l I                                                    ,
l l       .946-l: 1.030 l          1.000 l     1.030_l    1.270 l   1.060 l    .710 l      .557 l 1       .949 l     1.023 l       1.001 1     1.026 l    1.252 l   1.042 l    .705 l      .560 l   6
                  ~l       .29   .l  -  .70 l         .09 :l     .36 ' l -1.43 . l -1.68~ l     .74   l     .59  l l-                          l                                                                 l
                  'l                           I           .                                                     l l    1.010 l       1.180 l       1.030 l     1.280 l 1.020 l      1.250 l-   .889-l-     .794 l l    1.005~l       1.174 l       1.030 l     1.289 l _1.022-l     1.267.l~   .904 l      .810 l   7
                , l ;-.51
: l.      48- -l      .02    l   .70   l    .23 '
l  1.37   l  1.72   l  2.01    l l              1            l             I         l          l         l         l'         l l            1                                                             l l x.xxx l Predicted                                                        l   NE l y.yyy l Heasured l   z.zzz.l Percent Difference l            l                                                             l PAGE 19 4
                                                                                                                        ---- w w&

t.
      '1           .
N FIGURE 4.2-2 (c)
RADIAL POWER. DISTRIBUTION AT 100% FULL POWER
               ~
l-
                 ~
m                       l         .1 -           .l                           .l            l           l           l
                                  ~ l.     .878 l       1.060-l'       .810 l        .815 l        .787 l    .946 l     1.010 l
                        -8::l-             .902 l      .1.088~l        .838 l        .832 l        .811 l    .951 l     1.002 l l  .2.75 l        .2.68 l       3.48    l     2.09      l   3.06    l   .51     l    .77    l l                           l                           l                                   l
                                  -l                .           1.               .           l                                   l l-    .794 l         .889'l. 1.250 l       1.020 -l      1.280 l   1.030 l      1.180 l
        -_,              9           l-    .823 l         .938 l     1.285 l       1.028 l       1.289 l   1.028 l      1.171 l l   3.69     l   .5.55 'l       2.82-   l       .81' l        .71   l   .19     l    .77    l l                            '
l l-                                                                                          l l     .557 l         .710 l     1.060 l       1.270 l       1.030 l-  1.000 l      1.030 l 10- l               .572'l        .723''l 1.065 l       1.265 l       1.028 l   1.001 l      1.022 l
                                  -l     2.72     l     1.88    l      .51   l       .39    l      .19   l   .08     l    .78    l
                                  .I                                                                                            l l
l     1.010 l      1.260 l       1.330 l        .966 l   1.030 l      1.280 l 11                         l      .993 l      1.231 l       1.297 l         .948 l  1.032 l      1.297 l l   -1.65 l       -2.28 l     -2.45 l        -1.86 l       .16 ' .l   1.29    l I                                                                             l
_l                                     .                                        l l      .769 l      1.150 l        .988 l       1.330 l   1.270 l      1.020 l 12                         l      .741 l      1.088 l        .949 l       1.255.l   1.263 l      1.062 l
                                               -l     -3.62 l       -5.37 .l    -3.90 l        -5.62 l      .54     l   4.13    l l                                                                             l l
l      .835-l      1.150 l       1.260 l   1.060 l      1.250 l
                      .13                                       l      .799 l      1.109 l      '1.227 l   1.061 l     .1.296 l    ;
l   -4.35 l- -3.54 l           -2.62 l      .10     l   3.70    l  l l                                                               l  l
                                                                                                                  .           .l   ;
l       .769 l       1.010 l    .709 l       .889 l    l
: 14.                                                          .752 l                  .723 l l                    1.002 l                 .937 l l   -2.25 l           .84   l  2.04     l   5.42    l l               l                       l           l l           l  l l   .556 l       .793 l 15                                                                               l   .574 l       .829 l l  3.25     l   4.51    l l           l           l  ;
A              B            C.            D             E         F            G l            l         .
l
: l. x.xxx l Predicted                                                                 l         .
l y.yyy ~l Measured                                                                            l l1 z.zzz l Percent Difference                                                                  i l'
                                ^
,                                                l                                                                  SW   l l'                                                                                                                       l PAGE 20 i

m N 4 1
FIGURE 4.2-2 (d)
RADIAL POWER DISTRIBUTION AT 100% FULL POWER l            -l               l             l          l           l            l         l          l
               -lL       .795 l      1.010 l           .946 l      .787 l      .815 l       .810 l   1.060 l     .878 l l     .797 l      1.010 l           .957 l      .816 l      .837 l       .840 l   1.094 l     .909 l 8
               .l        .28      l    .03-      l   1.14     l  3.75     l 2.73      l   4.49    l  3.23    l  3.53   l
       .           l                                                                    '
                                                                                                              \
l
                 ~l                                                                     ,
l l .1.010 l        1.180 l         1.030 l     1.280 l    1.020 l       1.250 l      .889 l    .793 !
l   1.005 l       1.175 l        1.034 l      1.299 l    1.032 l       1.284 l      .936 l    .834 l    9 l     .51    ,l     .42      l      .34    l  1.49    l  1.14     l    2.71 l 5.30 l 5.15 l l-                                                                                                  I l     .
l l     .946 l- 1.030 l            1.000 l      1.030 l    1.270 l       1.060 l      .709 l    .556 l
              -l        .947 l 1.021'l              1.004 l      1.044 l    1.265 l       1.051 l      .726 l    .598 l 10    l l-   .09       l    .87; l         .45     l  1.32    l     .40   l     .86   l   2.45- l. 7.61     l l-                                                                                                   l
              'l l     .787:l      1.280 l         1.030 l        .966 l   1.330 l       1.260 l    1.010 l l~    .802 l      1.291 l         1.030 l        .949 l   1.294 l       1.221 l      .988 l             11
               - l 11.93          l   .86       l     .04    l -1.73    l -2.72      l -3.07     l -2.18    l l                                                                   l                     l
:l                                                                      l l
l     .815 l ~1 .020 l' 1.270 l 1.330 l                      .988 l 1.150 l          .769 l
:l        .846 l 1.048 l 1.256 l 1.251 l                         .943 l 1.072 l          .733 l             12 011 3.80 l 2.77 'l -1.13 l -5.94 l -4.55 l -6.79 l -4.62 l
              .. l                                                                                          l l
               'l4      .810'l      1.250 l         1.060 l      1.260 l- 1.150 l          .835 l l      .842 l      1.290 l         1.055 l      1.218 l 1.099.l           .789 l                         13 l 4.01          l- 3.22       l      .44- l -3.34      l -4.40 -l -5.51 l l                                                                               l l .1.060 l l                    .889 l          .710 l     1.010 l      .769 l l    1.106 l        . 939 l          .722 l      .988 l      .743 l                                      14 l 4.36 l 5.59                 l ,1.62      l -2.15' l -3.34        l l                                                      l           l
             . l.            .
l l      .878 l        .794 l          .557 l                                                                 j l      .918 l        .829 l          .574 l                                                              15 l'14.52 l. 4.44 l                  2.99    l l              l             l             l               -
         *^           ~H             J               K            L           M           N           P         R
                               -l             l                                                                   l
                             .l x.xxx l Predicted                                                                 l l y.yyy l Measured l   z.zzz l Percent Difference l             l                                                                   l   SE l
PAGE 21

i l
4.3 Shape Annealing Mt'rix (SAM) and Boundary Point Power Correlation                                                                                                                                                                                    1 (BPPC) Verification at 50% Full Power
 ?
9                             -              4.3.1                                                   Purpose Measurement of the SAM elements and BPPC constants was                                                                                                                        '
performed to determine acceptable values of these
              -                                                                                                      constants for a wide range of core axial power shapes.
Jg                                                       4.3.s2                                                  Test Method
                                                                                                           '         The SAM elements and BPPC constants were determined from a'least squares analysis of the measured excore detector
                                    %                                                                        /-readings and the corresponding power distribution determined from the incoro detector signals. Since
                                                                                                                 ,these values must be representative of the range of s' axial power distributions expected throughout cycle 4, i
it was desirable to measure these parameters within the
                                                                                                                 . expected range of axial shapes. This was done by
                %'             s                           ,                                                         initiating an axial xenon oscillation and periodically
                 ,;"-                                                  ..                                            recording incore, excore and reactor state parameters
               ~#
s during the-oscillation. The incore data was analyzed
                                             '                                                                       using an incore analysis computer code to obtain N                                                                           one-third Sore peripheral power integrals, one-third core detector fractional response, upper and lower
                                  ' , ' e.4 1                                 one-third core integrals of core average power and upper
                                                       %                                                             and lower core boundary point powers. A least squares J          -
analysis was then performed to obtain the optimum set of
                                         ~t                                      '
SAM elements and BPPC constants characterizing the e,                                                      r                 correlation between the excore detector response and the
      /                    J'            /                                                                N corresponding incore detector power distributions. The
                                                                                                                .an.aly.
sis was performed for each CPC channel.
n                    -                                   ,
                                                   ~
4.3.3                                                    Results and Evaluation                                                                                                                                                       i
                                                                                                                                                .,                                                                                                                                                 1
                                                     -       C                                                 - Acceptanbe crjteria for this test required that new SAM                                                                                                                          ;
                                           ;*                                                                    ' elues and BPPC coefficients be installed in each CPC.                                                                                                                           '
o                   .
                                  ..x                    -
For each SAM' calculated, a test value characterizing the e                                                      -
                                          '-                                                                        "goodnass of f1't" of each matrix was computed.
Acceptable test, values were obtained for each matrix.
                                                                                                    '               Hence, no further adjustments to the CPCs were
                                      ,,1                                                                           nece sary.                     Table 4.3-1 tabulates the results of the test.               <-                     ,
f o
         ,                                            ,.                                                           s-
           .b-                                                                                                             %
4 PAGE 22 l%.-         ,             ._

l                                                                                                                l l                                 TABLE 4.3-1                                                                    1 I                                                                                                                I
-l                       SHAPE ANNEALING MAYRIX.(SAM) AND                                                         l l                                                                                                                l l                BOUNDARY POINT POWER CORRELATION COEFFICIENTS                                                   l l                                                                                                                l NEASI' RED VALUE CPC CONSTANT PID   CHANNEL A      CilANNEL B        CllANNEL C                                  CilANNEL D l     SC11      81   5.4368         6.6147            6.4053                                      6.3730         l l     SCl2      82   1.6892           .24111            .43850                                       .62474    ,
l l     SC13      83  -4.3794        -3.4293           -3.0115                        -2.7126                      l l     SC21      84   1.2846           .10124            .50820                                       .01770      l l     SC22      85     .71944       3.1685            2.1816                                      2.9878         l l     SC23      86   1.5799           .22938            .75465                                       .31861      l l     SC31      87  -3.7214        -3.5134           -3.9135                        -3.3907                      l l     SC32      88     .59135         .07265          1.2569                                         .63699      l l     SC33      89   5.7995         6.2000            5.2569                                     5.3940          l l    BPPCC1     99     .01007         .10058 E-1        .10058 E-1                                   .10058E-1l l    BPPCC2    100     .0_3874        .39497 E-1        .39497 E-1                                   .39497E-1l l    BPPCC3    101     .01062         .10585 E-1        .10585 E-1                                   .10585F,-1l l    BPPCC4    102     .0458_1        .45986 E-1        .45986 E 1                                   .45986E-1l 1
l I
1 PAGE 23

F.         .-
                                              ,                    1
                               \                     m3 s                                                   ,
4.4 Radial Peaking Factor'and CEA Shadowing Factor Verification at 50%
1     ~
JFull Power ( :
4.4:1                Purpose Performance of this test at 50% full power assured conservatism of the radial peaking factors (RPFs) utilized by the CPCs and COLSS in the power distribution systhesis algorithms. In addition, it is used to verify
                               --          . the CEA shadowing factors used in CPCs.
                                  ~'
                       '4.4.2                The performance of this test involved establishing the following CEA configurations:
x                  ,
All CEAs out Group 6 at LEL (Lower Electrical Limit)
                         -                   Group 6 at LEL, Group 5 at LEL Group 6 at LEL, Group 5 at LEL, Group P at 37.5" wd. Group 6 at LEL, Group F at 37.5" wd. Group P at 37.5" wd.
At each CEA configuration, incore and excore data were recorded. This data was analyzed to determine the planar radial peaking factors and CEA shadowing factors for the particular CEA configuration.                  ~
14.4.3                Results and Evaluations Tables 4.4-1 and 4.4-2 summarize the results of t'ie radial peaking factor and CEA shadowing factor test.
All necessary adjustments to appropriate CPC and COLSS constants were made based upon measured RPFs and CSFs.
                                                                                         ,  PAGE 24 4

               . .i -
t l                                       I                  .
l           TABLE 4.4-1              'l                  !
;                                  l.                                      1                  .
I      RADIAL PEAKING FACTORS           l                  ,,
I                                       l                 l CEA GROUP / POSITION Fw                         l MEASURED-1                                         -
I                  l
                                  .l ARO                         1.6077   l                  l l                                      l                  :
                            . s. l 6/LEL                       1.7428   l l                                      l                  -
l 6/LEL, S/LEL                1.7529   l 1    .
l l-6/LEL, 5/LEL, P/37.5"       1.7409   l                  :
I-                                     l
                                 .l 6/LEL,' P/37.5"              1.7207   l                  .
: l.                                     I                  I l P/37.5"                 l   1.5947   l                  ;
i i
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PAGE 25 C.      s       "

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                                                                 ~
        ~l.                                                                                     I l                                          TABLE 4.4-2                                l l                                                                                     l l                                    CEA SHADOWING FACTORS                            l l                                                                                     l M ASURED CSF CEA GROUP / POSITION CHANNEL A    CHANNEL B      CHANNEL C   CHANNEL D     !
l-                                                                                    I
        'l     6/LEL                           0.9934        0.9993        1.0065      0.9980   l   .
I                                                                                      I   l l 6/LEL, S/LEL                        0.9074        0.8940        0.8894      0.8925   l   )
        .I                      .                                                               I l 6/LEL,-5/LEL, P/37.5"               0.9231       0.8903         0.8827      0.8827   l l-                                                                                     1 l 6/LEL, P/37.5"                      1.0181        1.0236        1.0310      1.0199   l l                                                                                      l l P/37.5"                          l  1.0130    l   1.0093   l    1.0093   l  1.0093   l 4
s H                                                                                                   !
                                                                                                  -l l
PAGE 26 e

r 4.5 Reactivity Coefficients at 50% and 100% Full Power 4.5.1      Purpose Temperature reactivity coefficients were measured at 50%
and 100% full power to verify that these parameters were within the range specified in Technical Specifications.
A power reactivity coefficient measurement was performed in conjunction with the temperature reactivity coefficient measurement at 50% full power.       In addition to verifying compliance with Technical Specifications, these measurements aid in verifying proper design and fabrication of the reload core and provide an expanded data base for reactivity balance calculations.
4.5.2      Test Method Two methods were used to determine the isothermal temperature coefficient (ITC) and power coefficient (PC); one method relies upon center CEA movement while the other method does not utilize movement of the center CEA.
4.5.2.1      Reactivity Coefficient Measurement with Center CEA Movement at 50% Full Power Measurement of the isothermal temperature coefficient (ITC) and power coefficient (PC) using center CEA movement was performed in two stages. Initial conditions were established
;                              with the reactor at steady state, equilibrium xenon and CEA group 6 at 120 inches withdrawn.
The ITC portion of the test was started by initiating a small increase in turbine load.
Reactor power was held essentfally constant by insertion of the center CEA while reactor
                              . coolant temperature was allowed to decrease.
After the system had stabilized at the new steady state conditions, data was collected and the process described above reversed.
This sequence was repeated to assure data was consistent and to reduce experimental
  .                           -uncertainty. Following completion of this phase of the test, initial conditions were re-established for the PC portion of the test.
This phase of the measurement was initiated by decreasing turbine load while withdrawing the center CEA to maintain reactor coolant temperature constant. Reactor power was allowed to increase and stabilize at a new steady state. This process was reversed PAGE 27

r-following a short data collection period at the new steady state. The entire cycle was then repeated to assure data was consistent and to reduce experimental uncertainty. Data obtained from the test was reduced to obtain two equations in which the ITC and PC were independent variables. These equations were solved simultaneously utilizing an iterative solution technique to obtain the ITC and PC.
The moderator temperature coefficient (MTC) was calculated by subtracting the predicted fuel temperature coefficient from the measured ITC.
4.5.2.2     Temperature Reactivity Coefficient Measurement without Center CEA Movement at 100% Full Power With the reactor at steady state, equilibrium xenon and CEA group 6 at 120 inches withdrawn, a small step change in the turbine control valve position was made and then adjusted to establish a new coolant inlet temperature.
This change produced a small turbine load-reactor power mismatch. The temperature change resulted in a reactivity feedback and a resultant power change. The power change produced an opposite reactivity feedback and the reactor settled out at a new power and temperature condition. The cycle was then reversed by making a small step change in the turbine control valve position in the opposite direction. The ITC was calculated iteratively
             .         using the resultant power and temperature changes along with an assumed power coefficient. The moderator temperature coefficient (MTC) was then calculated by subtracting the predicted fuel temperature coefficient (FTC) from the measured isothermal temperature coefficient (ITC).
4.5.3 Results and Evaluation Acceptance criteria state the following:
: a. The measured ITC shall agree with the predicted          -
values within 1 0.3 x 10-4 Ak/k/ F;
: b. The measured power coefficient should agree with the predicted values within 1 0.3 x 10-4 Ak/k/%
power; and
: c. The MTC shall be less positive than + 0.5 x 10 4
                 ^k/k/ F when reactor power is 5 70% of rated thermal power and less positive than 0.0 when reactor power is > 70% of rated thermal power and less negative than - 2.8 x 10-4 Ak/k/*F at rated thermal power.
PAGE 28

                          +
6
     .N.5
                                             -These criteria were met at both the 50% and 100%
test-plateaus. Table 4.5-1 tabulates - the results
                                             ~ of the reactivity coefficient measurements at 50%
and~100% full power.
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               - l-                                                                                           -l
                 .l                                            TABLE 4.5-1                                     l l                                                                                           l l                               REACTIVITY COEFFICIENTS AT                                  l l                                                                                           l
:   l                                  '50% AND 100% FULL POWER                                 l l'                                                                                          I WITil0UT CENTER TEST JPARAMETER A M0E ME R          CEA MOEM
                           ^
PREDICTED       MEASURED       PREDICTED     MEASURED
                 -l'     .
l
               '- l 50%      _lITC (Ap/*F)         -0.08 x 10-4        .125 x 10-4       N/A      l N/A     l
                 -l Full       l         .
l l1 Power lPC (Ap/% Power) -1.05 x 10-4            -1.148 x 10-4       N/A           N/A     l
                 'l~         .. l                                                                              l
               ;l                 MTC-(Ap/*F)-          .06 x 10-4     .015 x 10-4      .N/A           N/A     l l                                                                                            l
               ' l 100%' lITC (Ap/*F)                      N/A            N/A       -0.41 x 10-4 -0.39 x 10-4l l Full       l       .                                                                     -l l Power lPC (Ap/% Power)                 N/A            N/A       -0.87 x 10-4       N/A     l l            l                            .
                                                                             .                                 l
               .l              lMTC (Ap/*F)    - l-        N/A     l      N/A      l-0.28 x 10-4l-0.26 x 10-4l 5
     '-l T
PAGE 30

==5.0 CONCLUSION==

The results of the Arkansas Nuclear One Unit 2 Cycle 4 reload test program summarized in the body of this report:
            '(1) Verify that the core was correctly loaded with regard to the utilized fuel management plan and that there are no detectable anomalies present wnich would result in unsafe operation of the plant during the length of the cycle.
(2) Calculational models utilized in designing the reload core and performing the safety analysis for Cycle 4 adequately predict core behavior during this cycle.
            .The ANO-2 Cycle 4 reload core was demonstrated to be properly designed, fabricated and installed. The unit can be operated in a manner that should not pose undue risk to the health and safety of the public.
I v
PAGE 31 l-

p -3 ARKANSAS POWER & LIGHT COMPANY POST OFFICE BOX 551 LITTLE ROCK. ARKANSAS 72203 (501) 371-4000 June 22, 1984 2CAN068408 Director of Nuclear Reactor Regulation ATTN: Mr. James R. Miller, Chief Operating Reactors Branch #3 Division of Licensing U. S. Nuclear Regulatory Commission Washington, DC 20555

==SUBJECT:==
Arkansas Nuclear One - Unit 2 Docket No. 50-368                                    '
License No. NPF-6 ANO-2 Startup Report f     Gentlemen:                                                   '
Pursuant to the requirements of Arkansas Nuclear One - Unit 2 (ANO-2).
Technical Specification, Section 6.9.1.1, attached is the ANO-2 Startup Report for Cycle 4. The results and conclusions summarized in this report demonstrate that the AND-2 reload core has been properly designed and that the unit can be operated in a manner that will not endanger the health and safety of the public.
Very truly yours, John R. Marshall Manager, Licensing JRM/SAB/ac Attachment fpb OYg. O
    .                                                  T MEMBEA MfDOLF SOUTH UTIUTIES SYSTEM}}