'

. .

AVERAGE DAILY UNIT PC'4ER LEVEL

50-289'

-pocgg; no,

T'4I-1in;I7

12/1/IIDATE

W. E. PottsCOMPIETED BY

TEL. NO. 215-929-3601, Ext. 11h

NovemberMCIE

DAY AVERAGE DAIIY PCWER LEVEL (f.Ne-Net) DAY AVERAGE DAILY PGIER TEVELf ?#,Je--Met )

1 795 21 798

2 7o0 22 802

3 785 23 801

h 781 2h 799

8035 781 25

6 792 26 80h

805788 277

8038 793 28

802793 299

803791 3910

80311 33

80h12

80h13

3381h

7C515

79I16

78617

I99 E*^ c. o

18 bJu) Ui] \01

19

2 W 2910810 [3

.

.

/ERATING SUMMARY.

The unit operated at essentially 100% power for the entire =cnth except for the

,two brief unplanned forced reductions of November ik,1977 and November 17, 1977.

Monthly inspections of the Decay Heat Removal Pump shafts continue. In addition,the recirculation orifice on both Decay Heat Removal Pumps was removed in order toincrease the minimum recirculation flow.

The unit tripped frc= 100% power at 0757 cn Nove=ber lh ,1977, due to a =cdulefailure within the Integrated Centrol System (ICS) . The actual generated =egawattsignal feedback to the ICS failed icv causing the ICS to increase reactor power,steam, and feed ficv to correct for the seemingly large error between the =egavattdemand and actual generated negawatts. The Reacter protection System tripped thereactor approximately one minute after the ICS module failure. The =cdule wasrepaired and the unit was brcught back en line by 1620 hours, November ik, and theunit attained full pcver by 2320 hcurs , November 15, 1977

While operating at 100% pcVer, the unit experienced an ICS "unback to 55% pcVer dueto an erroneous Group One "in-limit" indication. The runback cecurred at Ihl3hours on November 17, 1977. The errenecus Group One in-limit indication clearedby itself and the unit returned to full pcver by lhh8 hours , November 17, 1977.Subsequent trouble shooting revealed excessive =cisture on the affected controlrod position cable trays due to a leaking roof.

MAJCR SATETY RElATED MAIRE'IA' ICE

Decay Heat pu=ps "A" and "3" were inspected during this =cnth for possible shaftdefects. The following work / inspection was performed en each pump:

1. IED readings were taken2. Pump to motor coupling removed3. Ultrasonic test of pump shaftk. Analysis of UT results

5 Ccupling of pu=p to =cter6. Testing of pump and declaring purp operable7 Return pump to service

Each pump was taken cut of service separately to perform the above verk. Results ofUT and IRD readings were satisfactory for both purps. All work performed on eachpump was cc=pleted within the time limits se+ forth in the technical specificaticns.

DR-P-1A end bell was replaced after discovering a slight crack in the end bell. Workincluded:

1. Testing of redundant cc=pcr.ent2. Disassembly of purp to =ctor coupling3 Disassembly of notcr end tellh. Replacement of end bell

5 IRD readings6. Testing of pump and declaring pump operable

7 Returning pump to service

Work was cc=pleted within time specifications set ferth in technical specificaticns.Test results were satisfactory.

o

. . . . _ _ . . . _ _ _ . . - . . . . . . - . . -.

1

.

n

1;tJIU1ARY : UNIT DIRffD(WNS AND PWER I(EIAJCTIONS

Tha uni t. rnn nt. essentin11y 100% power for the entfre month except between 0757 and 1(15 on 11/lb/77during wl:tch the- unit van rhutdown due to a flux / flow imbninnce reactor trip. The trip wan

50-P09enus-41 t y t.he? ICS S1 pins-Conyertar "I," moduIe fa111ng to the zero yo1L pisItion. The sk>du1e DOCKET NO.

w in replaced anel the unit returned to service. The ualt also expertenced a run back to 55%p<, var nt I h l i on ll/IT/Tl due to a faulty in limit livlication on group 1 control rods. The (JNIT NAffE TMI-I |

uni t wns r.+ turned to escentially 100% power by thh2 on 11/17/77DATE IP/1/77

CU4P!1TED BY W. E. Potts

TEL. NO. 215-%")-V41 Es t. IlhRP2 RT MON 111 November

METil(D OFTYI E SillflTING [0WNF-FORCED DURATide illE HEACTm (il

No. liATE S-ScilE14JIED (fl0URS) REASON (1) REIUCING P(WER (2) COMMENTS

5 ll/lb/77 F 8.3 A 3 Failure of ICS M.wlule Gignal Converter "I," (ICS #?-2-1,3)caused reactor powec to increase above 103% F.P. Thuscausing a flux / flow Imbalance trip.

,

I

(1) REASUI (2) ME'11 rop:A-EQtlIPMENT FAIIURE (EXPIAIM) 1-MANt!AI,

B.-MAINT. OR TEST P-MANtfAI, SCRAM

C-REMTELING 3-Alff04ATIC SCRAMsD-REGUIA1 DRY RESTRICTI(N h-0111ER (EXPIAIN)E-OPERATOR TRAINING AND

~O I.ICENSE EXAMINATirn-

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. . ._____ . _ - _ - _ _ - _ _ _ _ - - . . _ _ . _ _ _ . - _ . .

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.

UNIT SIRffMVNC AND P(WER NEIUCTIONSgggu(y ;

The ualt rnn at c=sentially 100% power for the entire mouth excelt tietween 0757 arel 1615 on 11/14/77during which the unit 'was shutdrwn due to a flux / flow imbalance reacter trip. The trip was WNemuel by the ICS Sigdal-4'onverter "L" module fallina to t he zero volt p>uition. The a dule DOCKET NO.

waa reg. laced and the unit returned to service. The unit also ext.crienced a run back to $5%gmer at l le l'1 on 11/17/77 dae to a faulty in limit ir,lication on group I control ruls. The UNIT NAME TMI-1unit was returne<1 to ecsentially 10id g> we r by I k h 2 on 11/17/77.

DATE 1//l /TT

C04PirTED BY W. E. I a' t s

TEL. NO. Pl'. 4?). dLOl , Ex t , 113IdP0HT W) NTH N verit er

MF'IH G) fFTYPE SHlf1" TING IiOWNF-imhCED [AIBATIQ4 THE NEACTGt Gt

NO. I> ATE S-SCHEICIED (HollHS) ItEASON (1) hEIUCING P(VEN (2) CtNMENTS

5 tt/lb/77 F 8.3 A 1 Failure or ICS blale Sl ynal Converter "L" (ICS #J-?-3,31causel reactor p>wer t o inercase at we los% F.P. Thuscausing a riux/ flow tubalance trip.

4(1) FZASG4: (2) ME'lHOD:

A-t%dUIIMEfrF FAIIDHE (EXPIAIN) 1-MANt!AL"

(~-) B-MAINT. OH TEST 2-MANt1AL SCRAMC-REMIEIJ NG 3-AlfffMATIC SLM#_ .NREGillATORY RECTNICTICTI k-0THEH (EKPIAIN)''

d E-OPERATOH TRAINING ANI)LICENSE EIAMINATI(#1

C3 F- AI4CNCTRATIVEC-TEhATI(14AL Emit (EXPIAIN)CJH- UIHER (EXPIAIN)C'

,

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