ML20077E502

Forwards Application for Amend to License NPF-3,removing Tech Specs Decay Heat Isolation Valve & Pressurizer Heater Interlock Requirements in Modes 4 & 5.Proposed Changes Involve Tech Specs 3/4.3.2

ML20077E502
Person / Time
Site:	Davis Besse
Issue date:	06/04/1991
From:	Shelton D CENTERIOR ENERGY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20077E505	List: ML20077E502 ML20077E511 ML20077E517
References
TAC-80329, NUDOCS 9106100419
Download: ML20077E502 (2)

Text

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.D-GNTEgR Doreld C. Shelton 300 Maison Avenue VW Pm Nuhr Toledo, OH 436520001

% g,$3, (419)249 7300 Docket Number 50-346 License Number NPF-3 Serial Number 1918 June 4. 1991 United States Nuclear Regulatory Commission Document Control Desk Vashington, D. C. 20555 Subj ec t s License Amendment Request to Remove Technical Specifications Decay Heat Isolation Valve and Pressurizer Heater Interlock Requirements in Modes 4 and 5 Gentlemen Enclosed is an application for an amendment to the Davis-Besse Nuclear Pover Station, Unit 1 (DBNPS), Operating License Number NPF-3, Appendix A Technical Specifications (TS). The proposed changes involve TS 3/4.3.2,

" Safety Features Actuation System Instrumentation."

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. The proposed changes remove operability requirements for decay heat isolation valve end pressut izer heater interlock channels in Modes 4 (hot shutdown) and 5 p.nld shutdo n). The decay heat isolation valve interlocks are intended to ensucc %Me valve isolation between the reactor coolant l system (RCS) and telatively low pressure decay heat removal system is l established during plant heatup (Modes 2 and 3) and maintained during plant

operation (Mode 1).

I The proposed changes also remove the requirement in TS 3/4.3.2 for the pressurizer heater interlock channels to be operable in Modes 4 and 5. The pressurizer heater interlock channels prevents pressurizer heater operation vith either of the two in-series decay heat isolation valves not fully closed. This interlock serves as an automatic prompt to the operator to properly position both decay heat isolation valves and enable the automatic valve closure interlocks. The pressurizer heater interlock is only needed in Mode 3 while either decay heat isolation valve is open. The proposed l change accordingly revises the mode applicability for the pressutIzer heater interlock to Modn 3 vith either decay heat isolation valve open. t 9106100419 910604 PDR ADOCE 05000346 l P PDR opemng comsomos ym -

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Docket Number 50-346  ;

License Number NPF-3 Serial Number 1918  ;

Page 2 Since these proposed changes also support co..iplete utillration of the safety l features _ actuation system shutdown bypass modification scheduled to be '

completed during the seventh refueling outage. Toledo Edison requests that this amendment be issued by the ?.'uclear Regulatory Commission by September 1, 1991, with implementation within 45 days following issuance.

If you have any questions regarding this amendment request, please contact Mr. Robert V. Schrauder, Manager - Nuclear Licensing, at (419) 249-2366.

Very truly yours,

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encloste e cca P. H. Byron, NRC Region III, DB-1 Senior Resident Inspector A. B. Davis, Regional Administrator, NRC Region III J. B. Hopkins, NRC/NRR DB-1 Senior Project Manager l J. R. Villiams, Chief of Staff, Ohio Emergency Management Agency, l State of Ohio (NRC Liaison)

Utility Radiological Safety Board l

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