ML19210D035

Monthly Operating Rept for Oct 1979

ML19210D035
Person / Time
Site:	Rancho Seco
Issue date:	10/31/1979
From:	Colombo R SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:
Shared Package
ML19210D032	List: ML19210D031 ML19210D035
References
NUDOCS 7911200447
Download: ML19210D035 (6)

Text

.

NARRATIVE Sl%".ARY OF Pl. ANT OPERATIONS 10-1 to Plant ooerated at approximately 100% full power.

Performed 10-9-79 routine surveillance and preventive maintenance items.

10-10-79 (1320)

Started plant shutdown from 890 MWe at 1 Mile / minute due to non-conpletion of pipe support work on the "A" Nuclear Service Cooling Water System (1600)

Reactor at 86% power 6753 MWe)

(2045)

Reactor at 43% power (s350 MWe) and decreasing at 1 MWe/ minute to a Hot Shutdown (2313)

Opened OCB's 220 and 230. Unit off line.

(2315)

Tripped Turbine and reduced reactor power to 14%

10-11-79 (2346)

Reactor at 11% power.

(0107)

Reactor at 10-8 amps.

(0119)

Reactor placed in Hot Shutdown.

10-12-79 (1102)

Reactor critical.

(1105)

Reactor at 10-8,mp,,

, 1950)

Started increasing to $10% for turbine roll.

(

(2105)

Reactor at s10% power.

(2110)

Latched main turbine. Unable to get intercept Valve #1 open.

10-13-79 (1358)

Reactor at 10% power, tripped turbine.

Reactor still at 10%.

(1650)

Started turbine roll.

(1814)

While putting excitation on maid unit, it tripped on overexcitation and caused reactor trip.

(1857)

Reactor critical.

-8 (1908)

Reactor at 10 amps.

(1925)

Reactor at 1% power.

(2029)

Reactor at 10% power.

(2129)

Closed OCB's 220 and 230. Unit on line.

i 3 ()

7911200 k

10-14-79 (0000)

Feactor at 47

(%397 MVe).

(0035)

Reactor at SO: (%400 MWe)

(0650)

Reactor at 72% (%620 MWe).

Started 5-hour hold.

(1150)

Raising power to 92%.

(1356)

Reactor at 87% (%810 MWe) - Started 2-hour hold.

(1600)

Increasing to 100% full power.

(1746)

Reactor at 100% full power (%910 MWe).

10-15 to 10-31-79 Plant operated at approximately 100% full power.

Performed routine surveillance and preventive maintenance items.

PERSONNEL CHANGES REOUIRING REPORTING No personnel changes that require reporting in accordance with Technical Specifications Figure 6.9-2 were made in October, 1979.

MAJOR ITEMS OF SAFETY-RELATED MAINTENANCE 1.

Continued inspection / testing of pipe supports; repaired or replaced as necessary to meet the new criteria covered in Bulletin 79-02.

SUMMARY

OF CHANGES MADE IN ACCORDANCE WITH 10 CFR 50.59(bl No changes, tests or experiments were completed in October, 1979, Ohich constituted a change in a safety analysis report description.

l'l 7' :/ 'l JlI 1

I i

REFUELING I?.70TJ'.ATIO:' ?.EQUEST Rancho Seco Unit 1 1.

Nace of Facility:

2.

Scheduled date for next refueling shutdoer:

Januarv, 1980 March, 1980

'3.

Scheduled date for restart following refueling: _

4: Technical Specification change or other license ar.cnd=cnt required:

a) Change to Rod Inder. vs. Power Level Curve (TS 3.5.2) b) Change to Core I balance vs. Pouer Level Curve (TS 3.5.2)

' c) Tilt Limits (TS 3'5.2) d) Safety Equipment Testing (TS 3.3.3)

December. 1979 5.

Scheduicd date(s) for submitting proposed licensing action:

None 6.

Important licensing considerations associated with refueling:

~

7.

Number of fuel assen.blies:

a) In the core:

177 112 In the Spent Fuel Fool:

b) 379 8.

Present licensed spent' fuel capacity:

9.

frojected date of the last refueling that can be discharged 1987 to the Spent Fuel Pool:

'7C' 312 e

AVERAGE D \\lLY UNI T POh ER LEVEL

~

DOCKET NO.

IJNIT Rancho Seco Unit 1 DATE 70-10-11

\\~) J '" " \\

n l

TELEPliONE (916) 452-3211 MONTil October DAY AVERAGE DAILY POW ER LEVEL DAY AVERAGE DAILY POWER LEVE!.

(MWe Net)

(MWe Ne:)

849 861 g7 2

946 18 865 3

853 39 860 4

857 867 20 5

861 21 869 6

861 22 865 7

003 863 23 8

864 24 9

860 860 25 10 AR7 26 866 11 0

27 866 12 0

28 865 13 0

29 865 14 Asn 30 867 15 858 33 866 16 858 INS 3CCTIONS On tha formt. h5t the acr;c J.: y t.r:t power laelin MWe Net for each day in the repoinn; m..nrh. Compute to the nes est wheie meganatt.

e (9/77 )

M &99mW_

__ w.mese.e.me eme e - ene=

=+

OPERATLNG DATA REPORT DOCKET NO.

50-312 DATE 79-10-31 i

CO3IPLETED I!Y 9

W.

Colombo l[id h f3

,.l 76Jr] h,o.

TELEPHONE I41 AW-1211 OPERATING ST \\TUS

l. Unit Name:

%ncho Seco l'nie 1

2. Reporting Fenod: October, 1979

3. Licensed Ther nal Power e3thri:

2772

4. Nr.episte Ratin; tGross alwer 061

5. Design Electrical Rating (Net ?.lWei:

918

6. Maximum Dependable Copacity iGrou.\\lWe::

917

7. Maximum Dependable Cacacity iNet 31We):

073

8. If Change, Occur in Capacity Rat:c3s fitems Number 3 Throu;h 7) Since Last Report. Gise Reasons:

9/s

9. Power Level To which Restricted. If Anv (Net 31We):

N/^

10.' Reasons For Restrictions, If Any:

N/A This Month Yr.to.Dat:

Cumulatise

-11. Hours !n Reporting Period 745 7,296 39,793

12. Number Of Hours Reactor Was Crities!

• • D O'"J

13. Resetor Resene Shutdown Hours 33.7 1,557.7 3,975.1

14. HoarsG.enerator Oa Line 6 74. 7 5,399.6 23,562.8

15. Unit Resene Shutdown Hours 0

1.199.3 1.210.2

16. Gross The. mal Ener;y G.nerated \\lWH) 1.847,705 14,753,805 59,826.961

17. Gran Electrical Ener;> Generated iathHi 590,650 4,808.359 20,071,159 IS. Net Efeetrical Energy Generated i3th Hi 559.602 4.560.773 18.9so.AA3

19. Unit Senice Factor 90.6 74.0 59.2

20. Unit Assilabi!ity Factor 90.6 90.4 62.3

21. Unit Capacit> Factor IUning MDC Neti 86.0 71.6 54.6

22. Unit Ca,,a,:it> Faetor iUsing DER Nets 81.8 68.1 51.9

23. Unic Forced Outiu Rate 9.4 5.9 33.2

24. ShutJown> Sehe.!aled Oser Nest o \\!onths IT)pc. Date Jcd Dur.: tion of Eachi:

RA#ueline i,ni,,v..

1000 - ri,, v, e f e, n, n n r n y f -, e n 1,.

An 4,ve Snubber insocction/cht.ncine of undervoltace setoointst Mid Yeve-ber - due,H nn 3 days.

25. If Shut Down \\t End Of Re;.:rt Period. Estimated Date of St_rtup:

N/A

26. Units in Tor Status iPrior to Commercia! Ogyrations:

Foreca :

Achiesed INITIAL CRITICAL.iii.

N/A e

N/A INITI \\L FLFCTR! CITY N/A N/A COMMLRCIAL UPER \\ fl0N N/A N/A h

s

O D

m g/ ha

!j 7r DOCKET NO. 50-312 i

UNITSilUTDOWNS AND POWER REDUCTIONS i j jj UNIT NA%IE Rancho Seco linit 1 C,,

.n

'D D ATE 79-10-11 COMPLEIEl> liv p t?

c.a m wn REPORT MONTit October TELEPilONE (916) 452-1711 "L

C C

EO

'e

• EU Licer.sce E-t

'd%

Cause A Corsective No.

Date 5j 3$d Event (i

f'8 Action so f

E j ;f, =

Repori e mu O

Prevent Recurrence H

g c5 I

13 79-10-10 F

7.3 D

1 79-014/03 L-0 CJ SUPORT Non-completion of pipe support work on Nuclear Service Cooling Water System.

Unit brought to llot Shutdown per Technical Specification limitations and work was completed.

6 2

3 4

F: Forced Reaum Method:

Exhibit G. Instructions s

S: Scheduled A-I: qui ment Failure (Explain)

' l-Manual for Preparation of Data c_w II.M.sintenance or Test 2 Manual Scram.

Enity Sheets for Licensee a

C Itcfueling 3-Automatic Sciam.

Event Report (LI:RI File (NUREG.

D Itc3;ulatory Restriction 4-Other (Explain) 01611 g

I' t)pesaior Tsaining & License Examination F. Adnunist raine 5

g G-Operationa! Eiror (Explain)

Exlubit I -Same Source (9/77)

Il Oiher (Explain)