ML20092M052

Monthly Operating Rept for May 1984

ML20092M052
Person / Time
Site:	Diablo Canyon
Issue date:	05/31/1984
From:	Kelly W, Thornberry R PACIFIC GAS & ELECTRIC CO.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
NUDOCS 8407020113
Download: ML20092M052 (5)

Text

x mn MONTHLY NARRATIVE REPORT t 0F OPERATION AND MAJOR MAINTENANCE EXPERIENCE a -

This report describes'the operating and major maintenance experience for the  !

month of May, 1984. .This narrative report was prepared by the plant staff and .

is submitted in accordance with Section 6.9.1.10 of the Plant Technical-

-Specifications.

Following. initial criticality of the Unit I reactor on April 29, 1984, zero-power physics testing and the special low power natural circulation testing commenced and was successfully completed well ahead of schedule on May 23, 1984

~w ith no significant' problems.

.0n May 6th, with one protection set out of service for a functional test, a

. spurious signal from a second protection set resulted in a reactor trip.

. Subsequent investigation revealed a faulty Temperature Modifier in the protection set II-control cabinet. The component was replaced and protection set II returned to service.  ;

-On May~8th,'a malfunction in the Steam Dump Control System allowed several 40

per cent steam dump valves- to open, initiating a high steam flow coincident with Low-Low Tavg safety injection and reactor trip. A failed pressure control module was replaced and the steam dump control system returned to service.

On May 14th, test recorders connected to pressure comparators through a defective isolator shorted the comparator's output, causing the Power Operated Relief. Valves (PORV's) to cycle open and closed. The PORV's were closed and isolated and the recorders removed. A Significant Event report was made to the NRC Operations Center.

~0n May 16, 1984, we reported to the NRC the occurrence of a Positive Moderator

= Temperature Coefficient (MTC) in the all rods withdrawn, beginning of cycle life, hotL zero power condition. A conservative upper estimate of predicted

.burnup sufficient to restore the temperature coefficient to within the s acceptable limit is 3500 MWD /MTV, which is equivalent to 93 effective full power

,  : days. In the interim,'the reactor will be operated with control rod withdrawal limits imposed to maintain.the actual MTC negative.

.On May 21st, the inadvertent deenergization of various plant radiation monitors resulted in the actuation of containment ventilation isolation. Power was restored to the radiation monitors within minutes and containment ventilation '

L returned to its normal lineup.

Upon successful completion of all startup tests, the Unit 1 reactor was shut down on May 23rd for Post-operations inspection and maintenance.

-0n May 25th, while draining the Unit 2 condenser hotwell, a quantity of water ,

containing fluorescein dye was discharced to the outfall. There was no significant impact to the environment and a news release to local news media was made.

'On May 31st, replacement of steam generator snubbers was completed. The newly l

. .-installed snubbers have an improved sealing and hydraulics system for a longer j expected service life with less maintenance and inspection required.

~

No changes have been made in the Offsite Dose Calculation Procedure, the Environmental Radiological Monitoring Procedure, or any radioactive waste l treatment systems.

i 8407020113 840531 PDR ADOCK 05000275 DC0044 .3 R PDR ,

$[

OPERATING DATA EPORT -

, DOCKET NO. 50-275

.t '

DATE COMPLETED BY 06/08/84-W.J. Kelly i TELEPHONE (805)595-7351 1 OPERATING STATUS' .

.l. .UnitLName: Diablo Canyon Unit 1 ,

c2.5 Reporting PeB od: May 1984 Notes: Startup Testing is

3. : Licensed Thermal Power i,MWt):- completed.- Awaiting grant 166.9 n4 1 NameplateRating(GrossMWe): i 1170 of the full power license  ;

5. EDesign Electrical Rating <(Net MWe): _ 1084- from the NRC.  !

,6B LMaximum. Dependable Capacity; Gross MWe): 1134 -

- 17.<: Maximum Dependable Capacityi Net MWe): 1084  :

78. 'If~. Changes 0ccur in Capacity Ratings (Items Number 3 Through 7) Since Last. Report, *

- Give -Reasons: :

p , ;-  ;

1. LPowercLevel To Which' Restricted,:If Any (Net--MWe):- 58.50 I L a 11?.c Reasons For Restrictions, If Any:.

Low power test permit granted by the Nuclear 4

Regulatory' Commission ~on April 13,1984, effective April 19, 1984 at 1200 nours.

i This Month Yr-to-Dat'e . Cumulative  !

e illi L Hours In Reporting Period _

o 744 4194 4194- i J12.c tNumber.Of Hours ' Reactor Was Critical- 330 378 378 s13. ; Reactor Reserve Shutdown Hours. 0 0 0

~1 4MHour's: Generator 0n-Line-- .

0 0- 0 i

M 15.sjUnit Reserve Shutdown Hours. . 0 0 0 9 216/' Gross Thermal Energy Generated ~(MWH) . 0 0 0-17.. LGross

. Electrical Energy. Generated (MWH) 0 0- ~0

~

~ '18.- Net Electrical Energy Generated (MWH)' -0 0- 0 l K19.~(Unit-Service Factor . 2 N/A L20g Unit. Availability Factor ~ . N/A j E . ;21.? (Unit' Capacity Factorf Using MDC: Net N/A ,

'4 224: LUnit Capacity Factor _ Using DER Net h/A e

23 d Unit Forced Outage. Rate.,. . .

N/A  !

- 24'._ Shutdowns l Scheduled Over Next 6 Months (Type, Date,;and Duration of Each):-

~ '

~

725.f 'If? Shut Down At End Of Report Period,. Est. Date of. Startup: -

-JULY 1984 n ,126. tUnits ..In Test -Status .(Prior to Commercial Operation): Forecast Achieved INITIAL CRITICALITY April 1984 April 1984 i LINITIAL' ELECTRICITY. July- 1984 .i

C0mERCIALHOPEP4110N ,

September 1984 i

+

e A

if . :DC0044 4l n

da_ 'tUL , s

y:y .

y 3-L  ;

.i'L

',, &G --

AVERAGE DAILY UNIT POWER LEVEL

' ~ '

.' ' DOCKET N0. 275

~~.r

, UNIT Diablo Canyon Unit 1 DATE T6/08/84-

_~ COMPLETED BY W.J. Kelly TELEPHONE -(805)595-7351

?

z. T. -- -

'May 1984

, M' ONTH 7

., -DAY l TAVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL

.UWE-NET). UWE-NET) l' 0 17- 0

2- 0 18. 0

,.3 0 19' 0

~*- :4 -

0 20 0

.5- ~0 _. 21 0 6 0 '22- 0' 7 0 :23 0 '-

~

8: 0 24- 0

'N ,9 0- 25 0 i W 10L 0 -26 'O a 114 ~0- 27 0

-121 0- 28 0 13' -0 29 0

14. 0 30 0'

15- 0~ 31 0

.16~ 0 m

40

. INSTRUCTIONS

^

-0n' this format, list the average daily unit power level in MWe-Net for each day in the

. reporting month. Compute to the nearest whole megawatt.

- DC0044: 5'

y  ;

3g a - + -

s c. 2

. 7, 4 - . s

'.m?? - , . y.;:/ N;, ,

7-LMIT;SRITDOW6 NO POER REDUCTIONS 00CET2e N

. . . . J' .

4> Wn ilMIT; NAPE -DIABLO LANYON UNIT 1 d w :DATE/ 05/04/84

.a C@PLETED bye W.J. Kell.Y '

TELEPHWE WUb)de-/351 REPORTPDfiH MAY.. -1%4 - ,

- Method.of Licensee. 'Cause.& Corrective Duration  : Shutting:. Event- System "Couponent < Action to -

<No. :Date' Typel -(Hours) Reason . 2 ' Down Reactor 3 Report # Code'* Code 5 Prevent Recurrencei TNONE- ,.

-P 1 2 -

3 4 F: -Forced Reason: Method: Exhibit G - Instructions S:--Scheduled A-Equipment Failure:(Explain) 1-Manual for Preparation of Data B-Maintenance or Test- 2-ManualiScram. Entry Sheets for Licensee C-Refueling . .

3-Automatic Scram. Event Report-(LER) File D-Regulatory Restriction. -

4-Other (Explain) (NUREG-0161)

E-Operator Training 8. License Examination F-Adminiftrative .. 5

G-Operational Error!(Explain) Exhibit I - Same Source sH-Other'(Explain)!

'DC0044 6

7_.

L, o.,

a

t. PACIFIC OAS AND E LE C T RIC C O M PANY DIABLO CANYON POWER PLANT PWE ,

i PO. Box 56 Avila Beach, California 93424 + (805) 595-7351 R.C. THORN 8ERRY PLANT MANAGER June 8, 1984 Office of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, DC 20555 RE: Docket No. 50-275 License No. DPR-76

- Monthly -Operating Report for May,1984 Gentlemen:

Enclosed are the completed monthly operating report forms for Diablo Canyon Unit 1 for May 1984. This report-is submitted in accordunce with Section 6.9.1.10 of our Technical . Specifications.

Sincerely, GEC 7 R. C. THORNBERRY RCT:jhr Enclosures cc Mr. John B. Martin, Regional Administrator Region V - USNRC

-. 1 y