ML20078M904

Quad-Cities Nuclear Power Station Unit One Cycle Fourteen Startup Test Results Summary

ML20078M904
Person / Time
Site:	Quad Cities
Issue date:	11/23/1994
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20078M880	List: ML20078M877 ML20078M904
References
NUDOCS 9412050199
Download: ML20078M904 (6)

Text

.

4 i

QUAD-CITIES NL'LLEAR POWER STATION UNIT ONE CYCLE FOURTEEN STARTUP TEST RESULTS

SUMMARY

i TECHRI'DUICYCLl4 9412050199 941123 PDR ADOCK 05000254 P PDR

e-4 l'

TABLE OF CONTENTS TEST NO. TITLE PAGE 1 SHUTDOWN MARGIN 1 2 CORE VERIFICATION 1 3 INITIAL CRITICAL 2 4 TIP REPRODUCIBILITY 3 AND CORE POWER i

TECINtirr\U1CYCLl4 j i

e '

1. Shutdown Marain Demonstration and Control Rod Functional Checks ,

Purpose The purpose of this test is to demonstrate for this core loading in the most-reactive. condition during the-operating cycle, that

- the reactor can be made subcritical with the strongest control rod fully withdrawn and all other rods fully inserted.

Criteria If a shutdown margin of 0.290% ok (0.25% + R + B.C settling penalty) cannot be demonstrated with the strongest control rod  ;

fully withdrawn, the core loading must be altered to achieve this margin. The core reactivity has been calculated to be at a maximum 0 MWD /ST into the cycle and R is given as 0.0Xok.

The control rod B,C settling penalty for Unit One is 0.04%ok.

Results and Discussion ,

s On July 8,1994 control rod E-5 was fully withdrawn to demonstrate ,

that the reactor would remain subcritical with the strongest rod .

out. This rod was calculated by Nuclear Fuel Services (NFS) to t have the highest worth with the core fully loaded. The strongest  ;

rod out maneuver was performed to allow single control rod withdrawals for CRD testing.

Control rod functional subcritical checks were performed as part  ;

of control rod friction testing. No unexpected reactivity insertions were observed when any of the 177 control rods were withdrawn.

Prior to the initial critical, NFS calculated the shutdown margin to be 1.22% ok (using a critical eigenvalue of 1.004) at 0 mwd /ST, which is the point of minimum shutdown margin for the cycle (R=0).

The difference between the estimated and actual critical eigenvalue was 0.494% ok. Corrections for temperature and period were -0.15% ok and .047% ok, respectively. Adding these  ;

corrections to the NFS calculated value, the shutdown margin for ,

Cycle 14 was determined to be 1.517% ok.

2. Core Verification '

, Purpose The purpose of the core verification procedure is to verify proper core location and orientation for each fuel assembly. 1 I

l l

TECmRPTTUICYCLl4 }

.' i f

Criteria

~

Prior to reactor startup the actual core configuration shall be verified to be ' identical to the planned core configuration.

Results and Discussion The Unit One Cycle 14 core verification was completed on July 7, ,

1994. Fuel assembly orientation, seating, and serial number were verified for each assembly. .,

The first inspect' ion was made to verify orientation and seating of assemblies. A second pass was subsequently made to verify bundle - ,

serial numbers. The four assemblies in cell location 42-07 were '

found not to be properly seated. These assemblies were removed from the core and the fuel support piece at 42-07 was reseated.

The four assemblies were then placed back into their. proper  :

locations and verified to be located and seated correctly. ' The 7 Cycle 14 core map is shown in Figure 1.

3. Initial Critical Prediction Purpose The purpose of this test is to demonstrate the ability of NFS to [

calculate control rod worths and shutdown margin by predicting the _;

in-sequence critical. .

Criteria ,

NFS' prediction for the critical rod pattern must _ agree within 1%. ,

Ak to the actual critical rod pattern. A discrepancy greater than j 1% Ak will be cause for an On-Site Review and investigation by NFS.  ;

Results and Discussion  ;

On August 19, 1994, at 1408 hours0.0163 days <br />0.391 hours <br />0.00233 weeks <br />5.35744e-4 months <br /> the reactor was brought critical with a reactor water temperature at the time of criticality ofl i 122oF. The difference between the expected critical rod pattern (at 68oF)~and the actual critical rod. pattern was 0.00894 from rod '

i worth tables supplied by NFS. The temperature effect was -0.0015 Ak from NFS supplied corrections. The excess reactivity from the -i 111 second period was 0.00047 Ak. These reactivities. sum to 1 0.00697 Ak difference (0.697% Ak) between the~ expected critical i rod pattern'and the actual rod pattern. This is within the 1% Ak- l criteria of this test, and NFS' ability to predict control rod t worths is, therefore, successfully demonstrated.

]

i l

l rscummuicycu4 2

o l

-4 4 '. - - Core Power Distribution Symmetry Analysis '

Purpose i The purpose of this test is to determine the magnitude of- -

indicated core power dist'ibution r asymmetries using data (TIP i traces and 00-1) collected in conjunction with the CMC update.  !

Criteria A. The total TIP uncertainty (including random noise and geometric uncertainties' obtained by averaging the uncertainties for all data sets) must be less than 9%. ,

B. The gross check of TIP signal symmetry should yield a maximum deviation between symmetrically located pairs of less than 25%.

Results and Discussion Due to a forced shutdown, this portion of the startup test program .

has not been. completed. A supplement to this report will be l issued upon completion of the test or in three months, whichever is-earliest.

t i

TECihRmUICYCL14 3

FIGURE 1 CYCLE 14 .

QUAD CITIES UNIT 1 REACTOR [ ,

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 ,

60 tmn two tmn tune tes trax inus imm tm7 tum -

60 58 tum tras4 tm4: tmes inm tmsc tmn tmo in2ss imo tuo tuo4 58 56 (mn tms) tuss 2 tnne (mu tmsc tmo imio inns tmn (mn tmn tmst tusi tuss twn twie imx 56 54 tuu tusa tus4 tuss tus2 tmn uso msu vm msso uso vmo nos mus tmn tmso tun trau ims tvan 54 52 tmso tmv tvan iniss msor tma moos um tum mso4 twa (mu us.si tmn mn ms* tmsi ms4o tytm tras two tun 52 50 tus2 ten tea 3 tmo msx im4: m s3 m ai tmss vain tmo usu uni twsos u2n tmis um mo nun unn trTns tun tymn two 50 48 tuxi tvm tun ten tnm vmo (mu uns twso4 vmu tmsi uns two imis uns tmn msn (moi u2n tmn um tmso tmis tvm tm): twee 48 43 tmm tu4o imes msos vm4 vm uisi twoo2 msai msie unr vasi vas vmu msor va2n nx3 msn twni uni nun un vmu inm tvan imos 46 44 tmss tues .msn mo4 tmsi mu vma) vaso two msi tmis uin tmi4 twsti vaisi tmn va2n two mso vmss vam (moo vmes vasn twu tun 44 42 tras2 tmu tmso tmu mse vans twim van twns m st imo en teso was uns (mss um twns mn tmu mso4 tmsa v42n van tnm imis tun two 42 40 tus two mm imo2 msss was twns van tum7 um tum3 mss 4 twm uso twmi twn4 me tmn umis tmm us2n two vasn twsis uns nun tnm2 tnm tvm tmu 40 38 tmss two (nni mus una (neos mes vas4 mn twns vmu tms: unis tmos msn vms twns urn tme nxu twm va2n vmu uma twoon va274 nun tw tms4 tuos 38 33 tmn tmas (mas muo tmn ms, imn um tmn vaise twas vmu twne was two2 ima vmos (mn mn tem vmon tm3: unao mm un4 tmu vassa inns inm4 tm4o 36 34 tuu tmso imu n3soo msos twics va2m nw vain tmos una two em twas uin mss im3s was twns um inni vains vmu uns twoos van nuis (ms tnm3 tmn 34 32 ten im:7 inns urn twm unis twm vmu tmn mso twns van twsss mm tmn tum vain tmp van to mio imio nun twoos van 2 two vm tuis (mso tuui 32 3D teso inm inns msis (mn vans tme vmu twsu mso twn3 msse twm mm tw= twm vans ime msn twns va2m tws2 nxu twm vans tw man tmu inm tuns 30 28 ten tmn inne vmx ess twei v43is msas wx teos usu tmn um tmn wn vaan two urn tmst uxo ten uans uxn tam 2 twan uno msss imm imo tra 28 23 tous tuna inns usos twns mu tnm ua3a tm:4 wio twn2 vano imm u2o tmas two vam twna um tuns mn twn: vans (mss vana tmsa nuo imii tmso (mx 26 24 tuxi imu tmn mut vams twin vmis vmos v42s2 twas unn twne vars tmn vais nxu twn4 um twm moor tmss vam msas nuo tmrt uno vmir (mn in2s2 tun 24 22 tux 4 tms tmn tmo msss vazia twin mss 4 tmas unze twm vms: twns uns imu twns un. ims man twno um (mas van twu3 uns nun tmas inin trace twa 22 j 23 tuns tuus (mss inni um v4x4 twoo ms2e (Mn um tMss uns tmn m4s vam tma u2s tmn mat (mas van (M34 uns vant inm imis trats ime 20 18 tux 3 twn van unas (mse mo msa2 vasi twar u2si tmas uns twers twsis va2n twm vaan tmsa uxu nisse usm inns msa ux* tuoi tmu 18

, 10 tm* tun tmo msn msos vasa uru twem unsa van uso msse uxoo uxn una va m van nun LWan vam uxx n3soi un34 in N trao2 1923 16 14 inso two tun tmu imse vas2 tmi4 ums twue msas imx uns twus (mn vam (nm usu tmu tmn van m ai (mai inne imas tmso imu 14 12 tms4 tme tvm imis vm24 mso varu va2n twin wo twur vam um tmn vans twin um mu mso ums (ms4 ten tmu ten 12 i 10 two ten tuos tmis mso2 inm man vams imii van tmn imm una tms2 vans Exs tmn msn l

tms: tues tun lm4 10 l 8 imo (msi tus tuus tu4u imp vmso ums msso um4 nxie uxos vm ww 1 tmu teos (mss traos tmis imi 8 6 two in3n tuns tun tmoo imu tmu tmo tmn tms4 inn 4 tmse imo tniu tveoi tmas 1

tym4 tmas 6 4 tmp tuo2 tyT2is tv12sl tvTns tyf22o tvT2s2 lit 2ss tvT2? tvf24s (valo (m42 4 l 2 twa tuss 4 tmsi ruxs inne twa tuni tuus (mos imas 2 3 5 7 9 1

11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 lhpEM .; L.i:' . ;" ' her. Af v " " " " "

())

\ ,

l 4~

p i.3  ;.m yf