ML20141F333

Monthly Operating Rept for Apr 1997 for Seabrook Station Unit 1

ML20141F333
Person / Time
Site:	Seabrook
Issue date:	04/30/1997
From:	Feigenbaum T, Nardone P NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NYN-97051, NUDOCS 9705210281
Download: ML20141F333 (5)

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i. ' North North Atlantic Energy Service Corporation P.O. Box 300 Atlantic seehrook, sii O3874 I

(603) 474-9 fat The Northeast Utilities System t

May 15,1997 Docket No. 50-443 NYN-97051 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 c

Seabrook Station hionthlv Oocrating Renort Enclosed please find Monthly Operating Report 97-04. This report addresses the operating and shutdown experience relating to Seabrook Station Unit 1 for the month of April,1997 and is submitted in accordance with the requirements of Seabrook Station Technical Specification 6.8.1.5.

Should you require further information regarding this matter, please contact Mr. Terry L. Harpster, Director of Licensing, at (603) 773-7765.

Very truly yours, NORTil ATLANTIC ENERGY SERVICE CORP.

Ted C. Feigenbaum Executive Vice President and Chief Nuclear Officer

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cc:

li.J. Miller, Region i Administrator A.W, De Agazio, NRC Project Manager, Seabrook Station h

J.B. Macdonald, Senior Resident inspector, Seabrook Station j

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9705210281 970430 PDR ADOCK 05000443 R

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OPERATING DATA REPORT DOCKET NO.

5043 UNIT Seabrook1 DATE May 1,1997 COMPLETED BY P.E. Nardone TELEPilONE (603) 773-7074 OPERATING stall'S 1.

Unit Name:

Seabrook Station Unit 1 2i Reporting Period:

APRIL, 1997 3

Licensed Thermal Power (MW ):

3411 4.

Nameplate Rating (Gross Mwe):

1897 5.

Dwign Electrical Rating (Net MWe):

1148 6.

Mnimum Dependable Capacity (Gross MWe):

1204 7.

Maaimum Dependable Capacity (Net MWe):

1158 8.

If Changes Occur in Capacity Ratings (Items Number 3 through 7) Since IJst Not Applichble Report, Give Reasons:

9.

Power Level To Which Restricted, If Any (Net MWe):

None 10.

Reasons For Restrictions,If Any:

Not Applicable This Month Yr-to-Date Cunndative 11.

Ilours in Reporting P uixi 719.0 2879.0 92376.0 12.

Number oflimrs Reactor Was Critical 719.0 2879.0 52553.9 1

13.

Reactor Reserve Shutdown Ilours 0.0 0.0 953.3 14.

Ilours Generator On-Line 719.0 2879.0 50179.8 15.

Unit Reserve Shutdown llours 0.0 0.0 0.0 16.

Gross Thermal Energy Generated (MWil) 2452033 9822832 165894042 17.

Gross Elec. Energy Generated (MWII) 867719 3475490 57857457 18.

Net Electrical Energy Genersted (MWil) 835136 3344649 555 % 598

• 19.

Usut Service Factor 100.0 100.0 83.1

• 20.

Unit Availability Factor 100 0 100.0 83.1

'21.

Unit Capucity Factor (Usmg MDC Net) 100.3 100.3 80.7

'22.

Unit Capacity Factor (Using DER Net) 101.2 101.2 80.9

'23.

Unit Forced Outage Rate 0.0 0.0 5.2 24.

Shutdowns Scheduled Over Neat 6 Months (Type, Date, Refueling. 05/10/97, 36 Days and Duration of Each):

25.

If Shut Down At End Of Report Period, Estimated Date of Not Applicable Startup:

• NOTE: "Cumulauve' values based on total Imurs starting 8/19/90, date Regular Full Power Operatice began.

Increased MDC values (Items 6 & 7) starting 11@l/95.

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50443 UNIT Seabrook1 DATE May 1,1997 COMPLETED BY P.E. Nardone TELEPHONE (603) 773-7074 MONDI: APRIL,1997 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net).

(MWe-Net) i 1145 17 1159 2

1862 18 1162 3

1162 19 1162 4

!!62 20 1162 5

!!62 21 1162 6

1863 22 1162 7

1163 23 1162

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8 1162 24 -

1862 9

1162 25 1162 10 1162 26 1862 11 1162 27

!!62 12 1162 28

!!62 13 1162 29 1163 14 1162 30 1162 15 1162 16 1164 g

INSTRUCTIONS On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest wlmle megawatt.

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UNIT SIIUTDOWNS AND POWER REDUCTIONS DOCKET NO.

50-443 UNTT Seabrook1 DATE May 1.1997 COMPLETED BY P.E. Nardone TELEPHONE (603) 773-7074 REPORT MONTi{ APRTL 1997 NO.

DATE TYPE' DURATION REASON

• METIIOD OF SIRTITING I ICENSEE EVENT CAUSE A CORRECTTVE ACTION 10 PREVFAT (IIOURS)

DOWN REACTOR

• REPORT #

RECL1RFSCE Page1ofI 974)1 OM)l/97 F

0 F

5 Two out of three 345KV transmission hnes trgped during severe winter snow storm. Commenced a power seduch in anncipanon of not being aNe to restore either line within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> per Techrucal Specifications.

Power reduction was terminated at H% RTP following restoration of first tripped line. The Unit returned to 100% RTP following restoration of secont tripped line.

97412 04/17/97 F

0 BiF Power Range channel N41 response time tesang exceeded 6 hour6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> window allcwed for Bypass / Test conhtion.

Channel N41 mal associated bistables were placed in tripped condition per Technical Specifications. Operanng procedures require a 2% RTP power reduction with loop i OPDT channel in tripped cesriition (N41 associated bistable). This action provides margin against an inadvertent OPDT trip due to the Upper Plenum Flow Anomaly. The Unit retured to 100% RTP following completion of N41 testing l

2 3

F: Forced Reason:

Method:

S: Scheduled A - Equipment Fadure (Explain) 1 - Manual B - Maintenan:e or Test 2 - Manual Scram C - Refuelmg 3 - Automanc Scram D - Regulatory Restriction 4 - Contmued from prevnis rnon:h E - Operator Training & License Exammation 5 - Power Reduction (D tradon = 0)

F - Admmistrative 9 - Other (Explain)

G - Operational Error (Explain) 11 - Other (Explain) l i

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- REFUELING INFORMATION REQUEST a ;-

DOCKET NO.

50 443.

I UNIT ScalmA 1

.DATE May 1,1997

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COMPLETED BY P.E. Nardone TELEPHONE !(603)773-7074 f

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'S bea rook Unit 1,

1.

Name of Facility:

j

- 2. Scheduled date for next refueling shutdown:

Refueling Outage 5, 05/10/97 3.'

Scheduled date for restart following refueling: Refueling Outage 5, 06/14/97 ~[ 36 days ]

L 4.1 Will refueling or resumption of operation thereafter require a technical specification change or other license amendment?.

]

I Yes:

LAR 97-01, Design Feature - Fuel Assembly Reconstitution (TAC M97929) -

I 5,.' Schedule date(s) for submitting licensing action and supporting information:

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' Submitted on February 18,1997

6. ' important licensing considerations associated with refueling, e.g., new or different fuel design or supplier, unreviewed l

- design or performance analysis methods, significant changes in fuel design, new operating procedures:

N/A i

4 7.- The number of fuel assemblies (a) in the core (b) in the spent fuel storage pool and (c) in the new fuel storage vault i

1 (a) 193 (b) 368 (c) 4 o

8.

The present licensed spent fuel pool storage capacity and the size of any increase in licensed storage capacity that has been requested or is planned, in number of fuel assemblies:

i Present licensed capacity:

1236 No increase in storage capacity requested or planned.

', 9.

The projected date of the last refueling that can be discharged to the spent fuel pool assuming the present licensed capacity:

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" Licensed capacity of 1236 fuel assemblies based on two annual and twelve eighteen-month refuelings with full -

core omond capability.

' The current licensed capacity is adequate until at least the year 2010.

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