ML20154D884

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PNO-OSP-88-006:on 880512,director Authorized Entry Into Mode 2 & Util Withdrawal of Shutdown Banks & RCS Dilution. Criticality Expected to Occur on 880513
ML20154D884
Person / Time
Site: Sequoyah Tennessee Valley Authority icon.png
Issue date: 05/12/1988
From: Richardson S
NRC OFFICE OF SPECIAL PROJECTS
To:
References
PNO-OSP-88-006, PNO-OSP-88-6, NUDOCS 8805200018
Download: ML20154D884 (1)


Text

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hi$ 1.1 1M PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-0SP-88-00 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is all that is known by the OSP staff on this date.

FACILITY: Tennessee Valley Authority Licensee Emergency Sequoyah Unit 2 Classification:

Notification of Unusual Docket No. 50-328 Event Soddy-Daisy, Tennessee Alert Site Area Emergency General Emergency X

Not Applicable

SUBJECT:

SEQUD AH UNIT 2 RESTART The Director, Office of Special Projects, authori:ed entry into Mode 2 for Sequoyah Unit 2 on May 12, it)88 at 4:34 am a6d TVA comenced withdrawal of shutdown banks and RCS dilution from 2000 ppm to 1200 ppm boron concentration. TVA expects to be at 1200 ppm boron concentration at 12, 1988. Upon completion of this initial approximately 6:00 pm today, May dilution and after TVA reviews the entire plant status and briefs the NRC restart team, TVA will withdraw the control banks to the desired height and then slowly dilute to critica,lity: Criticality is expected to [ occur on May 13,.1988.

This PN is being issued for information purposes only and is current as of 3:30 p.m. (EDST) on May 12, 1988.

CONTACT:

S. Richardson (301) 49-23286 DISTRIBUTION Mail:

5520:

Chafrman Zech - INRC1718/Leadep XCE Comissioner Roberts - INRC1718/Leadop OCS Comissioner Bernthal - INRC1718/Leadop OIA-MNBB-8607 Comissioner Carr - INRC1718/Leadop 01 - 3E4-Olewis Comissioner Rogers - INRC1718/Leadop OSP SECY - INRC1718/Leadop CA - INRC1718/Leadop PA - INRC02/Leadop Regional Offices _

ARM - NRCRM/ Brown A0E0 - NRCRMPN Region I - RI/Leadop Reoion !! - RII/Leadop Hqs Oper. Of fice - NRCRMPN Sequoyah Resident Inspector NRR - INRC1112/Berean Licensee:

TVA OE - INRC0708/Sumers NMSS - INRC0506/Leadop Region 11! - R!!!/Leadop OGC - INRC1516/Leadop Region IV - RIV/Leadop SP - INRC0304/SGindes Region !!! - RIII/Leadop E00 - INRC1718/Leadop DEDR0 - INRC1718/Leadop 4

$5h GPA - INRC1718/Leadop I

gg52Q18880512 PNG-OSP-88-OO6 DCD

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