ML19261D443

Monthly Operating Rept for May 1979

ML19261D443
Person / Time
Site:	Pilgrim
Issue date:	06/07/1979
From:	Whitney G BOSTON EDISON CO.
To:
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ML19261D442	List: ML19261D441 ML19261D443
References
NUDOCS 7906190250
Download: ML19261D443 (6)

Text

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OPERATING DAT.i REPORT I

DOCKET NO. 50-293 DATE 6/7/79 CO.\\lPLETED !sY C-n_ IJh4eney TELEPfl0NE 1-617 7'+7900 OPER AT NG c.TATUS

1. Unit Name:

D41gri-T Mav. 1979

2. Reportin; Period:

1998.

3. Licensed Thermal Po..rr 131Wt):

678.

4. Nameplate Ra:ing (Gross SIWE):

655.

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.i. Design Electrical Rat:ng(Net SlWe):

690.

6. Sf aximum Dependabie Capacity (Gross SIWE):

670.

7. Staximum Depend:ib:e Capacity INet SIW'e):

8. If Chan;es Occur in Capacity Ratings (Irems Number 3 Through 1) S;nce Last Report. Give Reasons:

None

9. Power Lael To Whi:h Restricted.lf Any (Net SIWE):

None

10. Reasons For Restrictions. If Any:

N/A This $1onth Yr..t o'.Da t e Cumulati.e 744.0 3623.0 56759.0

11. Hours In Reporting Period,

12. Number Of Hours Reactor Was Critical 322.1 3103.9 40151.6 0.0 0.0 0.0

13. Reactor Reserve Shutdown !!ours

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307.4 3075.4 38798.0

14. IIours Generator On.Line

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0 574728.0 6003744.0 64445544.0

16. Gross Thermal Encr;y Generated (51WH)

17. Gross Electric.*l Ener;:y Generated (stWii) 196550.0 2063010.0 21193484.0

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189230.0 1984915.0 20346479.0 IS. Net Electrical Energy Generated (.1WH) 41.3 84.9 68.4

19. Unit Service Facter 41 3 84.9

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20. Unit Availability Factor 38.0 81.8 s,_s

21. Unit Capacity Factor llhing SIDC Net) 38.8 83.6 54.7

22. Unit Capacity Facter(thm; DER Net) 58.7 15.1 11.1

23. Uni Forcesi Outar.e Rate

24. Shutdowns Schedt.ted Over Nest 6.\\lonths (Type. Date.and Duration of Each t wrw rrnit Oneratine

25. If Shut D r..n At End Of !!eport Period. Estime.ted Date of 5mitup:

26. Units in Te:t Status (Poor to Connuercial Operationn Forecast Actnesed INIT I A l. CitlTICAI.lTY INil I A 1. EL ECTRICITY CO?.!Sil:i:CIAL Ol' ERA Tl0N 2307 186 p,j q 7 9 0 61909-5D

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AVERAGE DAILY UNIT POWER LEVEL tu t, t

I DOCKET NO.

50-293 UNIT Pilgrim I DATE 6/7/79 COMPLETED BY G. G. Whitney TELEPif0NE 1-617-746-7900 MONTl!

May. 1979 DAY AVERACE DAILY iOWER LEVEL DAY AVERACE DAILY POWER LEVEL IMbe Net)

(MWe. Net) 1 664.

17 0_

665.

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2 18 3

533.

39 0.

4 664 20 0.

5 664 21 0.

6 665.

22 0.

7 664.

33 0,

s 663.

74 0,

9 663.

25 0.

10 662.

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26 0.

l;

620, 27 0,

12 1.

23 0.

13 0-29 0.

14 0-30 265.

15 0.

490:

3, 16 0.

2307 187 INSTT;UCTIONS On this fermat.Inr the serage J2:!> umt p.mer lese!in MWe.Ne,t for ca:h day in the reportin; month. Compu'c to the nearest whele m:pw.ti.

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UNIT SIIUTDOWNS AND POWEit REI)UCTIONS I)CCl:ET NO.

50-293 UNil NAME Pilgrim T liSIE 6/7/70 COMPl.E1El: :1Y C-C-

IJh i t n ov ItEPO?.T MONTIl

g g,g g.u.. NE l-617-746-79d0 l

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kt Cause & Cunettne N...

Date 3,

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jgy Event

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Prescar lle6unente H

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5/12/79 F

436.6 11 2

79-14/lX-0 CB SUPORT The cause of this event is belived to be the result of a deficiency in the w) original. design. The snubbers will be modified to with-stand the required loading.

Unit shut down to modify hydraulic snubbers.

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4 F: Foes ed Itcason:

hieilud:

Exinbit C lastructions gg OC)

S. S,lieduled A Equipinent failure (laplain) 1 Manual for Piep.natnin of l)ata CC)

!! Maintenance oi Tc:;t 2-Manual Scrain.

1.n t:3 Slieets los 1.ieensee C l(efuti:ng 3-Automatic Scr.iin.

INent I:cp.ni ii 1:10 ! de (NtiltEG-F' D !(egul.itory itestsiction 4 Otties (Explain) 0161) 1 0,iciatos Training & 1 itense E.w:tination g

F-AJnanntiaine 5

G Urse.ition l 1:sior (1:xplain) l~ sli. tnt 1 Same Sonice Pif77) ll Ollies (E splam)

BOSTON EDISON COMPANY PILGRIM NUCLEAR POWER STATION

SUMMARY

OF OPERATIONS FOR MAY, 1979 The month of May began with the unit operating at 100% power.

On May 3, 1979, during normal steady state power operations, "B"

Recirculation M.G. Set tripped on loss of lube oil.

Fluid drive oil pump P-225B was in service and tripped when relay 129A failed open.

The failure of this relay tripped the "B" lube oil pump and prevented both the "A" lube oil and De lube oil pumps from starting.

The 129B relay was replaced and the automatic transfer schemes were tested.

Transfer from pump "A" to "B" performed satisfactorily, however, the transfer from "B" to "A" could not be accomplished.

Further investigation revealed frozen contacts on the 106A relay.

No replacement relay was inmediately available, so the control room was instructed

• .o use the "A" pump as the primary component until a replacement relay could be installed. The Recirculation M.G. Set was returned to service and Recirculation pump restarted in accordance with station procedures.

The unit returned to 100% power at 0246 hours0.00285 days <br />0.0683 hours <br />4.06746e-4 weeks <br />9.3603e-5 months <br /> on May 4, 1979, and remained at this power level until 0010 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> on May 13, 1979, at which time the unit was taken out of service to inspect, seismically evaluate and modify, as necessary, snubbers on safety related systems.

Of the 76 snubbers inspected and evaluated, 30 were modified, doubling their load capability. The fillet welds on 13 snubber pads were increased, the steel work on 7 snubbers was mcdified, 3 snubber pads were replaced with thicker pads and the associated inbed bolts replaced with bolts of a larger diameter.

The modifications were completed and the reactor brought critical at 1116 on May 29.

The same day oscillations occurred in the main turbine EPR resulting in a reactor scram on a low level signal at 183c. The EPR was repaired and the reactor brought critical at 2121.

• ka generator was phased to the grid at 0444 on May 30.

The month of May ended with the unit operating at 80% power.

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-RErt1F.I.1NG INF010!ATTON

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-The following refueling information is included in the Monthly Report as requested in a letter to Mr. G. C. Andognini dated January 18, 1978.

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For your convenience, the information supplied has been enumerated so that each number corresponds to equivalent notation utill:cd in the request.

1.

The name_of this facility is Pilgrim Nuclear Power Station, Docket No. 50-293.

2.

Scheduled date for next Refueling Shutdown: January 1980 3.

' Scheduled date for restart following refueling: April, 1980 4.

5.

Due to their similarity, requests 4, 5 & 6 are responded to collectively.

6. *The' fuel, which is presently expected to be loaded during the next scheduled shutdown, may be reload fuel of a new design and may therefore require a proposed license subbittal and technical spectification change.

It is not possible, however, to supply pertinent information on dates. As information concerning fuel design, core configuration, Operational Review Committee determinations, proposed licensing action, and technical spectification submittals becomes availabic, it will be forwarded to you.

7.

(a) There are 580 fuel assemblies in the core.

g (b). There are 580 fuel assemblies in the spent fuel pool.

8.

(a) The station is presently licensed to store 2320 spent fuel assemblies.

The actual spent fuel storage capacity is 1160 fuel assemblies and new high density fuel storage racks are in the process of being installed.

(b) The planned spent fuel storage capacity is 2320 fuel assemblies.

9.

With present spent fuel in storage, the spent fuel pool now has the capacity

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to accommodate an additional 580 fuel assemblies (one core).

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