ML19253B923

Monthly Operating Rept for June 1975

ML19253B923
Person / Time
Site:	Crane
Issue date:	07/09/1975
From:	Lawyer L METROPOLITAN EDISON CO.
To:
Shared Package
ML19253B916	List: ML19253B915 ML19253B923
References
TASK-TF, TASK-TMR NUDOCS 7910310649
Download: ML19253B923 (3)

Text

{{#Wiki_filter:m UNIT Three Mile Island Unit 1 DATE July 9, 1975 COMPLtTED BY L. L. Larfer TEL. :10. 215-929-3601, Ext. 567 DAILY PLANT POWER OUTPUT MONTH June, 1975 DAY AVERAGE DAILY MWe-net DAY AVERAGE DAILY MWe-net 1 _q 21 466 2 -5 22 763 3 -6 23 720 h -10 2h 777 5 -11 25 100 6 -12 26 hl 7 -15 27 350 8 -30 28 6hh 9 h: 29 776 10 h2 30 766 11 92 31 12 60h 13 6h5 _ lb 656 15 750 16 78h 1505 '05 17 737 18 u-19 gie 7910310 f 20 636

SUMMAhY: From Jnoe 1 to June 11, 1975 the unit was still shutdown for the control rod interchange ort-UNIT NAME Three Mlle Island Unit 1 age. On June 9 the reactor was taken critical and zera-power physics testing was perferned. On June 11, DATE July 9, 1975 power escalation commenced. Additional [hysics testing was performed at 80% of full }cwer. Power was in-creased to 100T on June 16 and the unit remained at essentially full power until June 18 when the reactor CO*" ETED BY L. L. T.avyer trippe d due to a turbine load transient caused by erroneous control signals. During the rise to power af ter this trip, the turbine was removed from service on June 21 due to main transformer problems. IN11 TEL. NO. 215-Q?9 T 01, Fxt. 567 power was achieved on June 22. On June 23, load was reduced for a short period due to main transform.. malfunctions and the unit was returned to full power. On June 25. the reactor tripped due to im-HENRT MGNTH hn ' 1W balance because control rod Group 7 Phase B bus bar faulted to neutral causing Group 7 to drop into the An attempt was made to put the turbine on line on June 26 but water in the high pressure turbine core. caused a turbine trip on high eccentricity. The turbine was returned to service on June 27. full power was achie'ved on June 29, and the unit operated <it essentially full power for the remainder of the nua.t h. PLANT DHUTD0WNS ~ ~~ ~ MFTHOD OF TYPE F-FORCED DURATi3 CHU'1" PING DW'i No. PATE 8-CCliF.DUID ( HOIIHS) .lWASGN (1) THE HFACTOR (2) COMMFNTS 8 6/1/75 3 253.3 H A Continuation of control rod interchange outure started on May 31, 1975 9 6/18/75 V 20.2 A C A brush rec ^rder mor itoring the turbine electro hydraulic control (EHC) Cyste's caused erroneous voltage spikes to be red into the EHC System re-sulting in rapid load reduction and reactor trip on high pressure. 10 6/21/75 V 3.6 A NA The turbine had to be teken orf line due to main t ransformer pr(blems. Reactor power was reduced to 15% tc remove the t urbine from service.a 11 6/25/75 P 27.3 A C Reactor trip due to high positive imbalance created when control rod Group 7 Phase B bus bar faulted to neutral causing Group 7 control rods to drop into the core.== 12 6/J6/75 F 2 3+. 2 A NA When attempting to put the turbine on line after the reactor was returned to service, the turbine tripled due to high eccentricity. * (1) HEASON: (2) MerHOD: A-EQUIIMENT FAIIDHE (EXPLAIN) A-MANUAL s B-MAINT. OR TEST B-MANUAL SCRAM C-NEFIELING C-AUT0MATIC CCHAM C D-HEGULA'IUHY HESTRICTION W E-OPERATOR TPAINING AND e Non-Nuclear Equipment LICFWSE EXAMINt. TION

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c -4 D GRCS3 HOUR 3 IN REPCETING PEP!CD: ~M 2. CURPI.N*LY AL""HORI;ID FCWF.R LEVEL Wt 2*?S M'de-NE* 70 2 QXC"24 '_I?E:CA5!.E ,. oA 4,.y....v.5 y-, f PC'4ER *ZIEL TO WHICH FJ.~13!C ED (!F ANY): Ner.e 3 a i le. REASCN3 iR RESTRIC"!0N3 (!F A'iY): Not Applicable i t I. l THIS CC4ULATIVE ? F'I':"> YP-T"-CA*E % *A*r i I 5 HOUR 3 REACTCR WAS CRITICAL L6k.0 ???2.0 f ut. 6. REACTOR RESERVE SHL""00WN DURS 0 0 0.6 7 HOUR 3 GE'iERATOR CN-LINE 391.k ?c53.5 fil?.c O O O 8. CIIT RESERVE 3HUTDC'4'i HOUR 3. 9 GRCSS THEFF.AL PCWER GE'iERATED (%3) 379,7k6 S,6k?,29 3 1L,919,~C0 l 10. GECC3 ELEC"'RICAL P'WER GENERATED (W~i) 236,6Sk 2,929,Lk3 c,0?S,113 e i 11. NE"' ELECTRICAL PC'4ER OE* TERA *ED (W3) 260,197 2,738,373 L,726,63r i

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