ML20196B716

PNO-OSP-88-011:ON 880619,return to Power Following 10-day Outage Subsequent to 880609 Reactor Trip.Outstanding Maint Needed on balance-of-plant Equipment Reduced

ML20196B716
Person / Time
Site:	Sequoyah
Issue date:	06/21/1988
From:	Richardson S NRC OFFICE OF SPECIAL PROJECTS
To:
References
PNO-OSP-88-011, PNO-OSP-88-11, NUDOCS 8806300354
Download: ML20196B716 (1)

Text

June 21, 1988 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PN0-0SP-88-011 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verifi-cation or evaluation, and is basically all that is known by OSP staff on this date.

FACILITY _: Tennessee Valley Authority Licensee Emergency Classification:

Sequoyah Unit 2 Notification of Unusual Event Docket No. 50-328 Alert Soddy Daisy, Tennessee __

Site Area Emergency General Emergency X Not Applicable

SUBJECT:

SEQUOYAH UNIT 2 RESTART AFTER TRIP ON JUNE 9, 1988 At 10:00 a.m., on June 19, the Director, Office of Special Projects, authorized Sequoyah Unit 2 to return to power following an 10 day outage subsequent to the reactor trip of June 9, 1988. During the outage, the licensee reduced the outstanding maintenance needed on balance-of-plant equipment and incorporated various administrative changes to improve methods of pla" operation. ,

The reactor was determined to be critical at 2:49 p.m., on June 19. During the power ascension phase, the reactor power will be liinited to 70% of its design capacity. The reason for this is to extend unit op2 rating time and to assure sufficient shutdown margin following a reactor trip during the end-of-life fuel cycle.

The plant is currently at approximately 1% reactor power and holding to correct main feedwater pump turbine oscillations.

This PN is being issued for information purposes only and is corrent as of 8:00 a.m. on June 21, 1988. ,

CONTACT: S. Richardson - 492-3289 DISTRIBUTION 5520: Mail:

TaTrman Zech - INRC1718/Leadop X75 Comissioner Roberts - INRC1718/Leadop DCS Comissioner Bernthal - INRC1718/Leadop 01A-MNBB-8607 Comissioner Carr - 1NRC1718/Leadop 01 - 3E4-DLewis Comissioner Rogers - 1NRC1718/Leadop OSP SECY - 1NRC1718/Leadop CA - INRC1718/Leadop PA - 1NRC02/Leadop ARM - NRCRM/ Brown Regional Offices ~

A0ED - NRCRMPN Region I - Rl/Leadop Hqs Oper. Office - NRCRMPN Region II - RII/Leadop NRR - INRC1112/Berean Sequoyah Resident Inspector OE - 1NRC0708/ Summers Licensee: TVA NMSS - 1NRC0506/Leadop Region III - RIII/Leadop .

0GC - INRC1516/Leadop Region IV - RIV/Leadop SP - INRC0304/SGindes Region V - RV/Leadop EDO - INRC1718/Leadop DEDRO - INRC1718/Leadop GPA - INRC1718/Leadop gi e806300354 800621 f

-U 00-011 PDR l i

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