ML20212F065

PNO-OSP-87-013:TVA Indicated Desire to Conduct non-nuclear Heat Up of Unit 2 Before Restart

ML20212F065
Person / Time
Site:	Sequoyah
Issue date:	11/13/1987
From:	Donohew J, Mccoy F NRC OFFICE OF SPECIAL PROJECTS
To:
References
PNO-OSP-87-013, PNO-OSP-87-13, NUDOCS 9711040166
Download: ML20212F065 (1)

Text

o l nc 0f PRELIMINARY NOTIFIC ON OF EVENT OR UNUSUAL OCCURRENCE PNO-OSP-87-13 This preliminary nMif},catign constitutes EARLY notice of events of POSSIBLE safety or public interett tdgn'ific&nce. The information is as initially

/ received without verification or evaluation, and is basically all that is known s by the Region 11 staff on this date.

FACILITY: Tennessee Valley Authority Licensee Emergency Classification:

Sequoyah Unit 2 Notification of Unusual Event Docket No. 50-328 Alert Site Area Emergency  ;

General Emergency l X Not Applicable l

SUMMARY

OF DISCUSSIONS BETWEEN NRC AND TVA REGARDING HEATUP 0F SEQUOYAH UNIT 2 BEFORE RESTART TVA L s indicated to the Office of Special Projects (OSP) its desire to conduct a non-nuclear heat-up (to Modes 4 and 3. Hot Shutdown and Hot Standby) of i Sequoyah Unit 2 before the restart of the plant. Although there is fuel in the core, this non-nuclear heatup would use the plant's Reactor Coolant Pumps as the source of heat. Accordingly, the reactor will remain subcritical. This preliminary heatup would allow for the performance of required hot operational testino of both primary and secondary plant systems, early identification of

" cold layup" related equipment problems, and would enable operations personnel to get familiar with hot operations again. The plant would remain hot for a i specified period and then return to cold shutdown (Mode 5) to complete all remaining restart work. TVA is preparing to conduct valve lineups and is

,A discussing with the staff the work which must be completed before heatup. The

(.)

OSP staff has informed TVA that it will require compliance with all applicable Technical Specifications during the heat-up unless appropriate exemptions are obtained. Also, the staff will require TVA to formally document the basis to justify their compliance with the TSs. The staff will issue an SER prior to heatup. The two principal issues requiring resolution for heatup are pipe support criteria and modifications, and establishment of assurance that equipment required to function supported by silicone rubber cable will perform its intended function for Modes 4 and 3. Although TVA has not yet made a submittal

, addressing this preliminary " shake down" heatup, the staff believes it could

take place in the December 1987/ January 1988 timeframe. .

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/

This PN is being issued for information purposes only, yO  ! h dg O y

Contact:

UL J. Donobew, 492-7292 \

hs o.sg F. McCoy, 242-5525 i 7e DISTRIBUTION Willste Mail O' H Street MNBB Phillips E/W 4

NES Chairman Zech EDU~ NRR DU hMSS ADRIDMB

'" Com. Roberts PA OIA RES D0T: Trans Only i Comm. Asselstine MPA AE0D Applicable State Com. Bernthal ES NRR Comm. Carr OGC Air Rights INPO

. SECY NRR

< ACRS CW Regions:

/PDR' Licensee:

C '/ -n ,- , ' (Reactor Licenses) l

' Applicable Resident Site